KR102233094B1 - Method and apparatus for allocating resources of base station in carrier aggregation system - Google Patents

Abstract

The present invention proposes a resource allocation method and apparatus for the base station in a frequency integrated system. Through this, the base station sets a control channel format for transmitting feedback on downlink data to the terminal, sets a resource to transmit the control channel format to the terminal based on the set control channel format, and establishes different duplex structures. When scheduling downlink data of cells having, when a subframe of a specific cell is an uplink subframe, the set control channel transmission resource is used for control channel transmission or uplink data transmission of any terminal in the cell, It is possible to increase system resource utilization efficiently without deteriorating system performance.

Description

A method and apparatus for allocating resources of a base station in a frequency integrated system {METHOD AND APPARATUS FOR ALLOCATING RESOURCES OF BASE STATION IN CARRIER AGGREGATION SYSTEM}

The present invention relates to a method and apparatus for allocating resources of a base station in a frequency aggregation (CA) communication system.

In general, mobile communication systems have been developed to provide voice services while ensuring user activity. However, the mobile communication system is gradually expanding its domain to not only voice but also data services, and has developed to the extent that it can provide high-speed data services. However, in a mobile communication system in which a service is currently provided, a more advanced mobile communication system is required due to a shortage of resources and a demand for high-speed service from users.

In The 3rd Generation Partnership Project (3GPP), LTE-A (Long Term Evolution-Advanced) is a technology that implements high-speed packet-based communication having a transmission rate of up to 1 Gbps. In LTE-A, the number of cells to which the terminal accesses is expanded, but a method of transmitting feedback generated in each cell is adopted only in a primary cell. In addition, in LTE-A, cells configured for a terminal have the same duplex structure. Accordingly, all cells may have a frequency division duplex (FDD) structure or a time division duplex (TDD) structure. TDD cells may have a static TDD structure in which uplink-downlink (UL-DL) configuration is maintained, and UL-DL configuration is system information, high layer signaling, or DL common It can have a dynamic TDD structure that changes according to the control channel.

If one cell controlled by the base station has an FDD structure and one frequency band is added as a new cell, the added frequency band is easy to apply the TDD structure. The reason is that two different frequency bands are required between downlink (DL) and uplink (UL) in order to operate FDD.

Therefore, when the double structure is different between cells due to the addition of a limited frequency band or other reasons as in the above case, scheduling data in multiple cells and transmitting control information for the data does not affect the performance of the system. Instead, a method for using the resources of the base station to improve system performance is required.

Likewise, even when the doubles structure is the same between cells, a method for scheduling the resources of the base station for a plurality of cells without affecting the performance of the system is additionally required.

The present invention provides a method and apparatus for allocating resources of a base station in a frequency integrated communication system.

The present invention provides a method and apparatus for allocating resources of a base station when the double structure is different between cells in a frequency integrated communication system.

The present invention provides a method and apparatus for allocating resources of a base station when cells have the same duplex structure in a frequency integrated communication system.

A method according to an embodiment of the present invention; In the resource allocation method of a base station in a frequency integrated system, when an FDD cell is allocated as a P (Primary) cell and a TDD cell is allocated as an S (Secondary) cell to a first terminal, the n-th subframe of the TDD cell is uplink The process of determining whether it is a subframe, and when the n-th subframe of the TDD cell is the uplink subframe, the remaining resources other than the resources allocated for the first terminal in the n-th subframe are transferred to the second terminal. Including the process of allocating.

Another method according to an embodiment of the present invention; In the resource allocation method of a base station in a frequency integrated system, when an FDD cell is allocated as a P (Primary) cell and a TDD cell is allocated as an S (Secondary) cell to a first terminal, n of one of the FDD cell and the TDD cell A process of determining whether downlink data scheduling has been performed in a th subframe, and when the downlink data scheduling is not performed in the n th subframe, resources allocated for the first terminal in the n th subframe It includes the process of allocating the remaining resources to the second terminal except for.

Another method according to an embodiment of the present invention; In the resource allocation method of a base station in a frequency integrated system, when a first FDD cell is allocated as a P (Primary) cell and a second another FDD cell is allocated to a first terminal as an S (Secondary) cell, the P cell and the A process of determining whether downlink data scheduling has been performed in the n-th subframe of one of the S cells, and when the downlink data scheduling is not performed in the n-th subframe, the first It includes the process of allocating the remaining resources to the second terminal other than the resources allocated for the terminal.

Another method according to an embodiment of the present invention; In the resource allocation method of a base station in a frequency integrated system, when a first TDD cell is allocated as a P (Primary) cell and a second TDD cell is allocated to a first terminal as an S (Secondary) cell, the P cell and the S cell A process of determining whether downlink data scheduling has been performed in one of the n-th subframes, and when the downlink data scheduling is not performed in the n-th subframe, the first terminal is operated in the n-th subframe. It includes the process of allocating the remaining resources to the second terminal except for the resources allocated for the purpose.

1A and 1B are diagrams showing a communication system according to an embodiment of the present invention;
2A is a diagram showing a timing of a physical uplink control channel (PUCCH) transmission hybrid automatic repeat request (HARQ) for a physical data shared channel (PDSCH) transmitted from an S cell according to the first embodiment of the present invention;
FIG. 2B is a diagram showing PUCCH transmission HARQ timing for PDSCHs transmitted in Pcell and Scell according to a second embodiment of the present invention;
FIG. 2C is a diagram showing PUCCH transmission HARQ timing for PDSCHs transmitted in Pcell and Scell according to a third embodiment of the present invention;
FIG. 2D is a diagram illustrating PUCCH transmission HARQ timing for PDSCHs transmitted in Pcell and Scell according to the fourth embodiment of the present invention.
FIG. 2E is a diagram illustrating PUCCH transmission HARQ timing for PDSCHs transmitted in Pcell and Scell according to a fifth embodiment of the present invention;
FIG. 2F is a diagram showing PUCCH transmission HARQ timing for PDSCHs transmitted in Pcell and Scell according to a sixth embodiment of the present invention;
FIG. 2G is a diagram illustrating PUCCH transmission HARQ timing for PDSCHs transmitted in Pcell and Scell according to an eighth embodiment of the present invention;
FIG. 2H is a diagram showing PUCCH transmission HARQ timing for PDSCHs transmitted in Pcell and Scell according to the ninth embodiment of the present invention;
2I and 2J are diagrams showing a special subframe setting according to embodiments 8 and 9 of the present invention;
3A is a diagram showing a PUCCH format used when an FDD P cell and a TDD S cell are configured according to embodiments 1, 2, 8, and 9 of the present invention;
3B is a diagram showing a PUCCH format used when an FDD P cell and an FDD S cell are configured according to a third embodiment of the present invention;
3C is a diagram showing a PUCCH format used when an FDD P cell and an FDD S cell are configured according to a fourth embodiment of the present invention;
3D is a diagram showing a PUCCH format used when a TDD P cell and a TDD S cell are configured according to a fifth embodiment of the present invention;
3E is a diagram showing a PUCCH format used when a TDD P cell and a TDD S cell are configured according to a sixth embodiment of the present invention;
3F is a diagram showing a PUCCH format used when PUCCH transmission resources are shared and set to a terminal according to a seventh embodiment of the present invention;
4A and 4B show that when a subframe of a TDD Scell is an uplink subframe and there is no data scheduling in a Pcell or Scell according to an embodiment of the present invention, the base station uses the set control channel transmission resources for other purposes. Drawings showing examples,
5A is a flowchart showing an operation of a base station for resource allocation according to the first embodiment of the present invention;
5B is a flow chart showing an operation of a base station for resource allocation according to the second to eighth embodiments of the present invention;
5C is a flowchart showing an operation of a base station for resource allocation according to a ninth embodiment of the present invention;
6 is an internal configuration diagram of a base station according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout the present specification.

Hereinafter, in this specification, a Long Term Evolution (LTE) system and an LTE-Advanced (LTE-A) system are described as examples, but the method and apparatus according to the embodiment of the present invention are different from other communication systems to which base station scheduling is applied. It can be applied without.

The Orthogonal Frequency Division Multiplexing (OFDM) transmission method is a method of transmitting data using a multi-carrier, which parallelizes the serially input symbol strings and makes each of them mutually orthogonal. This is a kind of multi-carrier modulation method in which a plurality of multicarriers, that is, a plurality of sub-carrier channels, are modulated and transmitted.

In the OFDM scheme, the modulated signal is located in a two-dimensional resource composed of time and frequency. Resources on the time axis are distinguished by different OFDM symbols and they are orthogonal to each other. Resources on the frequency axis are divided into different subcarriers, and these are also orthogonal to each other. That is, in the OFDM scheme, when a specific OFDM symbol is designated on the time axis and a specific subcarrier is designated on the frequency axis, one minimum unit resource may be indicated, which is referred to as a resource element (RE). Different REs have characteristics that are orthogonal to each other even through a frequency selective channel, so signals transmitted to different REs can be received at the receiving side without causing mutual interference.

A physical channel is a channel of a physical layer that transmits a modulation symbol obtained by modulating one or more encoded bit streams. In an Orthogonal Frequency Division Multiple Access (OFDMA) system, a plurality of physical channels are configured and transmitted according to the purpose of the information stream to be transmitted or the receiver. The transmitter and receiver must make an appointment in advance on which RE to transmit one physical channel, and the rule is called mapping.

In an OFDM communication system, a downlink bandwidth is composed of a plurality of resource blocks (RBs), and as an example, each physical resource block (PRB) is 12 subcarriers arranged along the frequency axis. And 14 or 12 OFDM symbols arranged along the time axis. Here, the PRB becomes a basic unit of resource allocation.

A reference signal (RS) is a signal that is transmitted from a base station and enables the terminal to estimate a channel.In an LTE communication system, a demodulation reference signal that is one of a common reference signal (CRS) and a dedicated reference signal (DMRS: DeModulation Reference Signal, hereinafter referred to as'DMRS') is included.

The CRS is a reference signal transmitted over the entire downlink band and can be received by all terminals, and is used for channel estimation, configuration of feedback information of the terminal, or demodulation of a control channel and a data channel. The DMRS is also a reference signal transmitted over the entire downlink band, and is used for demodulation of a data channel and channel estimation of a specific terminal. Unlike the CRS, it is not used for configuring feedback information. Therefore, the DMRS is transmitted through the PRB resource to be scheduled by the terminal.

On the time axis, a subframe consists of two slots with a length of 0.5 msec, that is, a first slot and a second slot. A physical dedicated control channel (PDCCH) region that is a control channel region and an enhanced PDCCH (ePDCCH) region that is a data channel region are divided and transmitted on a time axis. This is to quickly receive and demodulate the control channel signal. In addition, the PDCCH region is located over the entire downlink band, and one control channel is divided into small unit control channels and distributed over the entire downlink band.

Uplink is largely divided into PUCCH (Physical Uplink Control Channel), which is a control channel, and Physical Uplink Shared Channel (PUSCH), which is a data channel, and a HARQ (Hybrid Automatic Repeat Request) response to a downlink data channel, Physical Downlink Shared Channel (PDSCH). And other feedback information is transmitted using a control channel when there is no data channel, and transmitted using a data channel when there is a data channel. The downlink may further include a physical downlink control channel (PDCCH), which is a control channel indicating the PDSCH.

A cell of the TDD structure may have one of a plurality of UL-DL configurations. Table 1 below shows an example of TDD UL-DL configurations. The radio frame of the TDD cell 10 functions as an uplink subframe (U), a downlink subframe (D), or a special subframe (S) according to the corresponding TDD UL-DL configuration. It includes three subframes.

Configuration
Serial Number Switching point
cycle Sub frame number 0 One 2 3 4 5 6 7 8 9 0 5 ms D S U U U D S U U U One 5 ms D S U U D D S U U D 2 5 ms D S U D D D S U D D 3 10 ms D S U U U D D D D D 4 10 ms D S U U D D D D D D 5 10 ms D S U D D D D D D D 6 10 ms D S U U U D S U U D

1A and 1B are diagrams showing a communication system according to an embodiment of the present invention.

Referring to FIG. 1A, in a network, a TDD cell 102 and an FDD cell 103 may be used by one base station 101. In this case, the terminal 104 transmits and receives data to and from the base station through the TDD cell 102 and the FDD cell 103. Uplink transmission of the terminal 104 is performed through a primary cell. For example, when the TDD cell 102 is a P cell, the UE 104 performs uplink transmission through the TDD cell 102, and when the FDD cell 103 is a P cell, the UE 104 Performs uplink transmission.

Referring to FIG. 1B, a network may include a macro base station 111 for wide coverage and a pico base station 112 for increasing data transmission amount. In this case, the macro base station 111 can transmit and receive data with the terminal 114 using the FDD scheme 116 and the pico base station using the TDD scheme 115. When the macro base station 111 and the pico base station 112 have an ideal backhaul network, uplink transmission may be performed through the macro base station 111 when the macro base station is a P cell. In this case, fast X2 communication 113 between base stations is possible, so even if uplink data is transmitted only to the macro base station 111, the pico base station 112 transmits uplink transmission-related control information to the macro base station through the X2 communication 113 It is possible to receive from 111 in real time. On the other hand, when the macro base station 111 and the pico base station 112 do not have an ideal backhaul network, uplink data may be transmitted from the terminal 114 to the macro base station 111 and the pico base station 112, respectively.

Meanwhile, the method according to an embodiment of the present invention to be described below will be described with the communication system shown in FIG. 1A as an example, but may be applied to the communication system shown in FIG. 1B or other similar communication systems.

2A is a diagram illustrating a PUCCH transmission HARQ timing for a PDSCH transmitted from an S cell according to the first embodiment of the present invention.

2A shows an embodiment of a control channel transmission using the timing of an FDD cell. Hereinafter, a method of determining a transmission timing of an uplink control channel of an FDD cell when transmitting an uplink control channel for downlink data in a TDD cell will be described with reference to FIG. 2A.

As shown in FIG. 2A, cells using different doubles schemes may coexist in the network. In FIG. 2A, the P cell 201 uses an FDD scheme (hereinafter referred to as'FDD cell 201'), _{uses f 1 as a frequency for downlink transmission, and f 2} as a frequency for uplink transmission. use.

The S cell 202 uses a TDD scheme (hereinafter referred to as'TDD cell 202'), and uses downlink subframes and uplink subframes set according to TDD UL-DL configuration #4. When the PDSCH 207 is scheduled in subframe #7 of the TDD cell 202, the HARQ response to the PDSCH 207, HARQ-ACK (Acknowledgement), is 4 subframes according to the transmission timing of the uplink control channel of the FDD cell. , May be transmitted in the uplink subframe #1 of _{the frequency f 2} of the FDD cell 201. At this time, if the PDSCH 206 of the FDD cell 201 is scheduled in subframe #7, the HARQ-ACK for the PDSCH 206 is an uplink subframe _{of the frequency f 2 of the FDD cell 201 after 4 subframes.} In #1, it is multiplexed with HARQ-ACK for the PDSCH 207 and transmitted (208).

When the PDSCH 203 in the FDD cell 201 is scheduled in subframe #2, the HARQ-ACK for the PDSCH 203 is 4 subframes later, and the uplink subframe #6 of _{the frequency f 2 of the FDD cell 201} Is sent from. At this time, the PDSCH 204 of the TDD cell 202 cannot be scheduled because subframe #2 of the TDD cell 202 is an uplink subframe. Therefore, in _{the uplink subframe #6 of the frequency f 2} of the FDD cell 201, the HARQ-ACKs of the TDD cell together with the HARQ-ACKs for the PDSCH 203 of the FDD cell 201 are DTX (Discontinuous) It can be processed (or indicated) as a non-transmission according to (205).

2B is a diagram illustrating a PUCCH transmission HARQ timing for PDSCHs transmitted in a P cell and an S cell according to the second embodiment of the present invention.

2B shows an embodiment of transmission of a control channel using timing of an FDD cell. Hereinafter, a method of determining a transmission timing of an uplink control channel of an FDD cell when transmitting an uplink control channel for downlink data in a TDD cell will be described with reference to FIG. 2B.

As shown in FIG. 2B, cells using different doubles schemes may coexist in the network. In FIG. 2B, the P cell 211 uses an FDD scheme (hereinafter referred to as'FDD cell 211'), uses f _{1 as a frequency for downlink transmission, and f 2} as a frequency for uplink transmission. use.

The S cell 212 uses a TDD scheme (hereinafter referred to as'TDD cell 212'), and uses a downlink subframe and an uplink subframe set according to TDD UL-DL configuration #4. When the PDSCH 217 is scheduled in subframe #4 in the TDD cell 212, the HARQ-ACK for the PDSCH 217 is 4 subframes according to the transmission timing of the uplink control channel of the FDD cell, the FDD cell 211 ) May be transmitted in the uplink subframe #8 of the frequency f _2. At this time, if the PDSCH 216 in the FDD cell 211 is scheduled in subframe #4, the HARQ-ACK for the PDSCH 216 is an uplink subframe _{of the frequency f 2 of the FDD cell 211 after 4 subframes.} In frame #8, it is multiplexed with HARQ-ACK for the PDSCH 217 and transmitted (218).

When the PDSCH 213 in the FDD cell 211 is scheduled in subframe #4, the HARQ-ACK for the PDSCH 213 is 4 subframes later, and the uplink subframe #8 of _{the frequency f 2 of the FDD cell 211} Is sent from. In this case, in subframe #4 in the TDD cell 212, it is assumed that the PDSCH 214 is not scheduled according to the determination of the base station. Therefore, in _{the uplink subframe #8 of the frequency f 2} of the FDD cell 211, HARQ-ACKs of the TDD cell together with the HARQ-ACK for the PDSCH 213 of the FDD cell 211 may be DTX-processed and transmitted. There is (215).

In FIG. 2B, a case in which the P cell and the S cell have different duplex structures has been described, but the method described in FIG. 2B is applicable even when the P cell and the S cell have the same duplex structure. In addition, the method described in FIG. 2B is a case where the P cell and the S cell have the same double structure TDD, and the P cell and the S cell operate according to the same UL-DL configuration or different UL-DL configurations. It is also applicable to

2C is a diagram illustrating a PUCCH transmission HARQ timing for PDSCHs transmitted in a P cell and an S cell according to the third embodiment of the present invention.

2C shows an embodiment of transmission of a control channel using timing of P cells when FDD cells are frequency-integrated. Hereinafter, an operation of transmitting an uplink control channel for downlink data in a P cell and an S cell from the P cell will be described with reference to FIG. 2C.

In Fig. 2c, cells are using the same doubles method. That is, the P cell 221 uses the FDD scheme, uses f _{1 as a frequency for downlink transmission, and f 2} as a frequency for uplink transmission.

The S cell 222 uses the FDD scheme, uses f _{3 as a frequency for downlink transmission, and f 4} as a frequency for uplink transmission. When the PDSCH 227 is scheduled in subframe #7 in the S cell 222, the HARQ-ACK for the PDSCH 227 is of frequency f ₂ after 4 subframes according to the transmission timing of the uplink control channel of the P cell. It may be transmitted in uplink subframe #1. At this time, if the PDSCH 226 in the Pcell 221 is scheduled in subframe #7, the HARQ-ACK for the PDSCH 226 is an uplink sub _{of the frequency f 2 of the Pcell 221 after 4 subframes.} In frame #1, it is multiplexed with HARQ-ACK for the PDSCH 227 and transmitted (228).

When the PDSCH 223 in the Pcell 221 is scheduled in subframe #0, the HARQ-ACK for the PDSCH 223 is 4 subframes later, and the uplink subframe #4 of _{the frequency f 2 of the Pcell 221} Is sent from. In this case, it is assumed that in subframe #0 in the Scell 222, the PDSCH 224 is not scheduled according to the determination of the base station. Therefore, in _{the uplink subframe #4 of the frequency f 2} of the P cell 221, HARQ-ACKs of the S cell together with the HARQ-ACK for the PDSCH 223 of the P cell 221 are not transmitted according to the DTX scheme. It can be treated as (225).

2D is a diagram illustrating a PUCCH transmission HARQ timing for PDSCHs transmitted in a P cell and an S cell according to the fourth embodiment of the present invention.

2D shows an embodiment of transmission of a control channel using timing of a P cell when FDD cells are frequency-integrated. Hereinafter, with reference to FIG. 2D, it will be described that the P cell transmits an uplink control channel for downlink data in the P cell and the S cell.

In Fig. 2d, cells use the same doubles method. In FIG. 2D, the P cell 231 uses the FDD scheme, uses f _{1 as a frequency for downlink transmission, and f 2} as a frequency for uplink transmission.

The S cell 232 uses the FDD scheme, uses f _{3 as a frequency for downlink transmission, and f 4} as a frequency for uplink transmission. When the PDSCH 237 is scheduled in subframe #4 in the S cell 232, the HARQ-ACK for the PDSCH 237 is the frequency f ₂ after 4 subframes according to the transmission timing of the uplink control channel of the P cell. It may be transmitted in uplink subframe #8. At this time, if the PDSCH 236 in the Pcell 231 is scheduled in subframe #4, the HARQ-ACK for the PDSCH 236 is an uplink sub _{of the frequency f 2 of the Pcell 231 after 4 subframes.} In frame #8, it is multiplexed with HARQ-ACK for the PDSCH 237 and transmitted (238).

When the PDSCH 234 in the Scell 232 is scheduled in subframe #7, the HARQ-ACK for the PDSCH 234 is 4 subframes later, and the uplink subframe #1 of _{the frequency f 2 of the Pcell 231} Is sent from. In this case, in subframe #7 of the Pcell 231, it is assumed that the PDSCH 233 is not scheduled according to the determination of the base station. _{Therefore, in the uplink subframe #1 of the frequency f 2} of the P cell 231, the HARQ-ACKs of the P cell together with the HARQ-ACK for the PDSCH 234 of the S cell 232 are not transmitted according to the DTX scheme. It can be processed as (235).

2E is a diagram illustrating a PUCCH transmission HARQ timing for PDSCHs transmitted in a P cell and an S cell according to the fifth embodiment of the present invention.

2E shows an embodiment of transmission of a control channel using timing of P cells when TDD cells are frequency-integrated. Hereinafter, with reference to FIG. 2E, transmission of an uplink control channel for downlink data in a P cell and an S cell will be described.

In Fig. 2e, cells are using the same doubles method. In FIG. 2E, the P cell 241 uses a TDD scheme, and uses a downlink subframe and an uplink subframe set according to TDD UL-DL configuration #1.

The Scell 242 uses a TDD scheme, and uses a downlink subframe and an uplink subframe set according to TDD UL-DL configuration #1. When the PDSCHs 247 are scheduled in subframes #0, #1, and #3 in the S cell 242, the HARQ-ACK for the PDSCHs 247 is in the TDD UL-DL configuration #1 of the Pcell. It may be transmitted in the uplink subframe #7 of the P cell according to the uplink control channel transmission timing. At this time, if the PDSCHs 246 in the Pcell 241 are scheduled in subframes #0, #1, #3, the HARQ-ACK for the PDSCHs 246 is the TDD UL-DL configuration of the Pcell # According to the transmission timing of the uplink control channel in 1, in the uplink subframe #7 of the Pcell, it is multiplexed and transmitted together with the HARQ-ACKs for the PDSCHs 247 (248).

When the PDSCHs 243 in the Pcell 241 are scheduled in subframes #0, #1, and #3, the HARQ-ACK for the PDSCHs 243 is in the TDD UL-DL configuration #1 of the Pcell. It is transmitted in the uplink subframe #7 of the Pcell 241 according to the uplink control channel transmission timing. In this case, in subframes #0, #1, and #3 in the Scell 242, it is assumed that the PDSCHs 244 are not scheduled at all by the determination of the base station. Therefore, in the uplink subframe #7 of the P cell 241, HARQ-ACKs of the S cell together with the HARQ-ACKs for the PDSCHs 243 of the P cell 241 are processed as non-transmission according to the DTX scheme. Can (245).

In FIG. 2E, a case in which the P cell and the S cell operate according to the same UL-DL configuration while the P cell and the S cell have the same TDD as each other are described. Even in this case, the method described in FIG. 2E can be applied only as a difference in the UL control channel transmission timing according to the UL-DL configuration applied to the P cell and the S cell.

FIG. 2F is a diagram illustrating a PUCCH transmission HARQ timing for PDSCHs transmitted in a P cell and an S cell according to the sixth embodiment of the present invention.

2F shows an embodiment of transmission of a control channel using timing of P cells when TDD cells are frequency-integrated. Hereinafter, with reference to FIG. 2F, it will be described that the P cell transmits an uplink control channel for downlink data in the P cell and the S cell.

In Fig. 2f, cells are using the same doubles method. In FIG. 2F, the P cell 251 uses a TDD scheme, and uses a downlink subframe and an uplink subframe set according to TDD UL-DL configuration #1.

The Scell 252 uses a TDD scheme, and uses a downlink subframe and an uplink subframe set according to TDD UL-DL configuration #1. When the PDSCHs 257 are scheduled in subframes #0, #1, and #3 in the S cell 252, the HARQ-ACK for the PDSCHs 257 is in the TDD UL-DL configuration #1 of the Pcell. It may be transmitted in the uplink subframe #7 of the P cell according to the uplink control channel transmission timing. At this time, if the PDSCHs 256 in the Pcell 251 are scheduled in subframes #0, #1, #3, the HARQ-ACK for the PDSCHs 256 is the TDD UL-DL configuration of the Pcell # According to the transmission timing of the uplink control channel in 1, in the uplink subframe #7 of the Pcell, it is multiplexed and transmitted together with the HARQ-ACK for the PDSCHs 257 (258).

When the PDSCHs 254 in the Scell 252 are scheduled in subframes #0, #1, and #3, the HARQ-ACK for the PDSCHs 254 is in the TDD UL-DL configuration #1 of the Pcell. It is transmitted in the uplink subframe #7 of the Pcell 251 according to the uplink control channel transmission timing. In this case, in subframes #0, #1, and #3 of the Pcell 251, it is assumed that the PDSCHs 253 are not scheduled at all by the determination of the base station. Therefore, in the uplink subframe #7 of the P cell 251, the HARQ-ACKs of the P cell together with the HARQ-ACKs for the PDSCHs 254 of the S cell 252 will be processed as non-transmission according to the DTX scheme. Can (255).

FIG. 2G is a diagram illustrating a PUCCH transmission HARQ timing for PDSCHs transmitted in a P cell and an S cell according to the eighth embodiment of the present invention.

2G shows an embodiment of transmission of a control channel using the timing of an FDD cell. Hereinafter, a method of determining a transmission timing of an uplink control channel of an FDD cell when transmitting an uplink control channel for downlink data in a TDD cell will be described with reference to FIG. 2G.

As shown in FIG. 2G, cells using different doubles schemes may coexist in the network. In FIG. 2G, the P cell 261 uses an FDD scheme (hereinafter referred to as'FDD cell 261'), uses f _{1 as a frequency for downlink transmission, and f 2} as a frequency for uplink transmission. use.

The S cell 262 uses a TDD scheme (hereinafter referred to as'TDD cell 262'), and uses a downlink subframe and an uplink subframe set according to TDD UL-DL configuration #4. The UE may obtain the downlink frequency f1 for the Pcell while performing a cell search, and the uplink frequency f2 for the Pcell may be obtained by receiving system information from the base station. In addition, the terminal may obtain the TDD UL-DL configuration information for the S cell through an upper signal.

When the PDSCH 270 is scheduled in subframe #1 in the TDD cell 262, the HARQ-ACK for the PDSCH 270 is the FDD cell 261 after 4 subframes according to the transmission timing of the uplink control channel of the FDD cell. ) May be transmitted in the uplink subframe #5 of the frequency f _2. Subframe #1 of the TDD cell 262 is a special subframe, and includes a DwPTS 272, a Guard Period (GP) 273, and an UpPTS 274. The DwPTS 272 is a section for naturally performing downlink transmission following the immediately preceding downlink subframe (#0), and the GP 273 earns the time required for the terminal to switch the RF from downlink to upstream. The UpPTS 274 is a section for starting uplink transmission and allowing uplink transmission to be naturally performed even in the next uplink subframe (#2). The lengths of the DwPTS, GP, and UpPTS on the time axis are defined in the special subframe configuration, and the special subframe configuration of the TDD cell 262 is transmitted to the terminal through an upper signal. The PDSCH 270 may be transmitted in the DwPTS 272 capable of performing downlink transmission. However, if the DwPTS 272 is less than 4 OFDM symbols, that is, 3 OFDM symbols, the PDSCH is defined so that it cannot be transmitted. This is because a PDCCH can be transmitted up to 3 OFDM symbols, so there is no region in which a PDSCH can be transmitted.

On the other hand, if the PDSCH 269 in the FDD cell 261 is scheduled in subframe #1, the HARQ-ACK for the PDSCH 269 is an uplink subframe _{of the frequency f 2 of the FDD cell 261 after 4 subframes.} In #5, it is multiplexed together with the HARQ-ACK for the PDSCH 270 and transmitted through a PUCCH format preset by an upper signal (271).

When the PDSCH 263 in the FDD cell 261 is scheduled in subframe #1, the HARQ-ACK for the PDSCH 263 is 4 subframes later, and the uplink subframe #5 of _{the frequency f 2 of the FDD cell 261} Is sent from. In this case, in subframe #1 in the TDD cell 262, it is assumed that the PDSCH 264 is not scheduled according to the determination of the base station. Subframe #1 of the TDD cell 262 is a special subframe, and includes a DwPTS 266, a GP 267, and an UpPTS 268. The lengths of the DwPTS, GP, and UpPTS on the time axis are defined in the special subframe configuration, and the special subframe configuration of the TDD cell 262 is transmitted to the terminal through an upper signal. The special subframe #1 is a subframe in which the PDSCH can be transmitted, but the PDSCH 264 is not scheduled according to the determination of the base station, and thus the PDSCH 264 is not transmitted in the DwPTS 266.

Therefore, in _{the uplink subframe #5 of the frequency f 2} of the FDD cell 261, HARQ-ACKs of the TDD cell 262 together with the HARQ-ACK for the PDSCH 263 of the FDD cell 261 are DTX-processed. It is transmitted through the PUCCH format set in advance by the higher signal (265).

In FIG. 2G, a case in which the P cell and the S cell have different duplex structures is described, but the method described in FIG. 2G is applicable even when the P cell and the S cell have the same duplex structure. In addition, the method described in FIG. 2G is a case in which the P cell and the S cell have the same double structure TDD, and the P cell and the S cell operate according to the same UL-DL configuration or operate according to different UL-DL configurations. It is also applicable to

2H is a diagram illustrating a PUCCH transmission HARQ timing for a PDSCH transmitted in an S cell according to a ninth embodiment of the present invention.

2H shows an embodiment of transmission of a control channel using the timing of an FDD cell. Hereinafter, a method of determining a transmission timing of an uplink control channel of an FDD cell when transmitting an uplink control channel for downlink data in a TDD cell will be described with reference to FIG. 2H.

As shown in FIG. 2H, cells using different doubles schemes may coexist in the network. In FIG. 2H, the P cell 281 uses an FDD scheme (hereinafter referred to as'FDD cell 281'), _{uses f 1 as a frequency for downlink transmission, and f 2} as a frequency for uplink transmission. use. The UE may obtain the downlink frequency f1 for the Pcell while performing a cell search, and the uplink frequency f2 for the Pcell may be obtained by receiving system information from the base station. In addition, the terminal may obtain the TDD UL-DL configuration information for the S cell through an upper signal.

The S cell 282 uses a TDD scheme (hereinafter referred to as'TDD cell 282'), and uses downlink subframes and uplink subframes set according to TDD UL-DL configuration #4. When the PDSCH 290 is scheduled in subframe #0 of the TDD cell 282, the HARQ-ACK response to the PDSCH 290 is 4 subframes according to the transmission timing of the uplink control channel of the FDD cell 281. , May be transmitted in the uplink subframe #4 of _{the frequency f 2} of the FDD cell 281. At this time, if the PDSCH 289 of the FDD cell 281 is scheduled in subframe #0, the HARQ-ACK for the PDSCH 289 is an uplink subframe _{of the frequency f 2 of the FDD cell 281 after 4 subframes.} In #4, it is multiplexed together with the HARQ-ACK for the PDSCH 290 and transmitted through a PUCCH format preset by an upper signal (291).

Next, an embodiment in which the PDSCH cannot be transmitted in the special subframe of the TDD cell 282 will be described. When the PDSCH 283 in the FDD cell 281 is scheduled in subframe #1, the HARQ-ACK for the PDSCH 283 is 4 subframes later, and the uplink subframe #5 of _{the frequency f 2 of the FDD cell 281} Is sent from. At this time, in the PDSCH 284 of the TDD cell 282, the PDSCH cannot be transmitted because the subframe #2 of the TDD cell 282 is a special subframe in which the DwPTS 286 consists of 3 OFDM symbols. As described above, the special subframe configuration of the TDD cell 282 is transmitted to the terminal through an upper signal, and when the DwPTS 286 set by the special subframe configuration is less than 4 OFDM symbols, that is, 3 OFDM symbols. , PDSCH is defined so that it cannot be transmitted. This is because a PDCCH can be transmitted up to 3 OFDM symbols, so there is no region in which a PDSCH can be transmitted.

Therefore, in _{the uplink subframe #5 of the frequency f 2} of the FDD cell 281, HARQ-ACKs of the TDD cell together with HARQ-ACKs for the PDSCH 283 of the FDD cell 281 are DTX (discontinuous) processing. It is transmitted through the PUCCH format preset by the higher signal (285).

2I and 2J are diagrams illustrating a special subframe configuration according to embodiments 8 and 9 of the present invention.

In LTE, the special subframe configuration defining the length of the DwPTS, GP, and UpPTS of the special subframe is whether the cyclic prefix (CP) applied in the downlink is a normal cyclic prefix. Depending on whether it is an extended cyclic prefix, 10 special subframe settings (FIG. 2I) and 8 special subframe settings (FIG. 2J) are included. Whether the cyclic prefix applied in the downlink is a normal cyclic prefix or an extended cyclic prefix may be obtained through decoding of a synchronization signal received from a cell by the UE.

Referring to FIG. 2i, in a special subframe configuration (2A-1) supporting a normal cyclic prefix in downlink, a special subframe configuration in which a PDSCH including DwPTS of 3 OFDM symbols cannot be transmitted is #0 (2A-2). And #5(2A-3). Referring to FIG. 2J, in a special subframe configuration (2B-1) supporting an extended cyclic prefix in downlink, a special subframe configuration in which a PDSCH including DwPTS of 3 OFDM symbols cannot be transmitted is #0 (2B-2). And #4(2B-3).

Therefore, when the TDD cell supports a normal cyclic prefix in downlink with a special subframe configuration, that is, a special subframe configuration #0 (2A-2) or #5 (2j-3), the embodiment of FIG. 2H is applied. Otherwise, the embodiment of FIG. 2G may be applied. When the extended cyclic prefix is supported in the downlink, that is, when the special subframe configuration #0 (2B-2) or #4 (2B-3) is used, the embodiment of FIG. 2H may be applied, otherwise the implementation of FIG. 2G Examples can be applied.

Hereinafter, a specific HARQ-ACK transmission method will be described with reference to FIGS. 3A to 3F.

3A is a diagram illustrating a PUCCH format used when an FDD P cell and a TDD S cell according to the first and second embodiments or the eighth and ninth embodiments of the present invention are configured. In the first embodiment of FIG. 2A, a transmission mode may be set so that two codewords are transmitted to the FDD cell 201, and a transmission mode may be set so that two codewords are also transmitted to the TDD cell 202. In addition, the terminal may transmit the PUCCH based on the PUCCH format according to the first embodiment of the present invention. (In the following, a case in which the PUCCH format is "PUCCH format 1b with channel selection" will be described, but the embodiment of the present invention may be applied even when the PUCCH format is different from "PUCCH format 1b with channel selection".) In this case, FIG. 2A In subframe #7 of, the PDSCH 206 and the PDSCH 207 are respectively scheduled and transmitted in the FDD cell 201 and the TDD cell 202, and the HARQ-ACK for them is 4 subframes after the FDD cell 201. It is transmitted in the uplink subframe #1 of the frequency f _{2 (208).} At this time, it is determined whether HARQ-ACK for each of the four codewords is ACK or NACK as decoded by the UE, and is mapped to the table shown in FIG. 3A.

For example, if the result of decoding performed by the UE is ACK and NACK/DTX for two codewords transmitted from the FDD cell 201, and ACK and ACK for two codewords transmitted from the TDD cell 202, The UE performs HARQ-ACK transmission using the second row 301 in the table of FIG. 3A. That is, the UE transmits HARQ-ACK by mapping 0,1 to n(1)_PUCCH,2 resource b(0)b(1). Then, the base station decodes b(0)b(1)=0,1 from the n(1)_PUCCH,2 resource, so that the UE ACK, NACK/DTX, and ACK for a total of 4 codewords of the FDD cell and the TDD cell. , It can be seen that the ACK has been transmitted.

Next, since the PDSCH 203 is scheduled and transmitted in the FDD cell 201 in subframe #2 of FIG. 2A, and the subframe #2 of the TDD cell 202 is an uplink subframe, PDSCH transmission is not performed. Accordingly, the HARQ-ACK for the PDSCH is transmitted in the uplink subframe #6 _{of the frequency f 2 of the FDD cell 201 after 4 subframes (205).} At this time, the HARQ-ACK for the two codewords transmitted from the FDD cell is determined as ACK or NACK as decoded by the UE and may be mapped to the table of FIG. 3A, but the two codewords transmitted from the TDD cell are Since it does not exist, each can be mapped to DTX.

For example, the UE's decoding result is ACK and NACK/DTX for two codewords transmitted from the FDD cell 201, and since there is no codeword transmitted from the TDD cell 202, the transmission mode for the two codewords DTX and DTX are set according to, and the UE performs HARQ-ACK transmission using the fifth row 302 from the bottom in the table of FIG. 3A. That is, by mapping 1,0 to b(0)b(1) on n(1)_PUCCH,0 resource, HARQ-ACK is transmitted. The base station decodes b(0)b(1)=1,0 from the n(1)_PUCCH,0 resource, so that the UE ACK, NACK/DTX, and DTX for a total of 4 codewords of the FDD cell and the TDD cell. , It can be seen that DTX was transmitted. At this time, when the subframe of the TDD cell is an uplink subframe, since both the third and fourth columns must be DTX configured, when the subframe of the TDD cell is an uplink subframe, a mapable row is indicated by reference numeral 303. You can see that it is limited to the indicated line. Therefore, when the subframe of the TDD cell is an uplink subframe, n(1)_PUCCH,0 resources are used, and n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3 Is not used.

In addition, when SORTD (Spatial Orthogonal Resource Transmit Diversity) is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH existing in the table of FIG. 3A are set. In addition to ,3, additional resources n(1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as the upper signal. Therefore, when the subframe of the TDD cell is an uplink subframe, n(1)_PUCCH,0 and n(1)_PUCCH,0' resources are used, and the remaining resources are not used. When the number of UEs simultaneously scheduled in the cell of the base station is large and the UL-DL configuration of the TDD cell includes a large uplink subframe, among the resources set for the PUCCH format, the subframe of the TDD cell is an uplink subframe. In this case, the amount of unused resources increases even further.

Accordingly, when an FDD cell is used as a P cell and a TDD cell is used as an S cell by the base station, the UE uses the PUCCH format according to an embodiment of the present invention, and the subframe of the TDD cell is an uplink subframe. The remaining resources other than n(1)_PUCCH,0 may be used for PUSCH transmission or PUCCH transmission of an arbitrary terminal without deteriorating system performance. That is, the remaining resources can be used for PUSCH transmission or PUCCH transmission of any terminal without deterioration in performance according to the transmission amount of the terminal configured for the PUCCH transmission resource. Alternatively, when SORTD is set, the remaining resources other than n(1)_PUCCH,0 and n(1)_PUCCH,0' set as a higher signal can be used for PUSCH transmission or PUCCH transmission of any terminal without deteriorating system performance. And, due to this, system performance can be improved.

In FIG. 3A, a table for applying PUCCH format 1b with channel selection is described as an example when both the FDD P cell and the TDD S cell are set to a transmission mode for performing two codeword transmission. Method is applicable. That is, when only one of the FDD Pcell and TDD Scell is set to two codeword transmission modes, a table for applying PUCCH format 1b with channel selection and one codeword for both FDD Pcell and TDD Scell are transmitted. When the mode is set, it can also be applied to a table for applying PUCCH format 1b with channel selection.

When an FDD P cell and a TDD S cell according to the second embodiment of the present invention are configured, a PUCCH transmission method will be described with reference to FIG. 3A as follows. In the second embodiment of FIG. 2B, a transmission mode may be set so that two codewords are transmitted to the FDD cell 211, and a transmission mode may be set so that two codewords are also transmitted to the TDD cell 212. In addition, the UE may transmit the PUCCH based on the PUCCH format according to the second embodiment of the present invention. (In the following, a case in which the PUCCH format is “PUCCH format 1b with channel selection” will be described, but the embodiment of the present invention may be applied even when the PUCCH format is different from “PUCCH format 1b with channel selection”.) In this case, FIG. 2B The PDSCH 216 and the PDSCH 217 are respectively scheduled and transmitted in subframe #4 of the FDD cell 211 and the TDD cell 212 of the FDD cell 211 and the HARQ-ACK for them is 4 subframes after the FDD cell 211 It is transmitted in the uplink subframe #8 of the frequency f _{2 (218).} At this time, it is determined whether HARQ-ACK for each of the four codewords is ACK or NACK as decoded by the UE, and is mapped to the table shown in FIG. 3A.

For example, if the result of decoding performed by the UE is ACK and NACK/DTX for two codewords transmitted from the FDD cell 211, and ACK and ACK for two codewords transmitted from the TDD cell 212, The UE performs HARQ-ACK transmission using the second row 301 in the table of FIG. 3A. That is, the UE transmits HARQ-ACK by mapping 0,1 to b(0)b(1) over n(1)_PUCCH,2 resources. Then, the base station decodes b(0)b(1)=0,1 from the n(1)_PUCCH,2 resource, so that the UE ACK, NACK/DTX, and ACK for a total of 4 codewords of the FDD cell and the TDD cell. , It can be seen that the ACK has been transmitted.

Next, the PDSCH 213 is scheduled and transmitted in the FDD cell 211 in subframe #4 of FIG. 2B, and the PDSCH 214 is not scheduled according to the determination of the base station in subframe #4 of the TDD cell 212. Assume Accordingly, HARQ-ACK for the PDSCH is transmitted in uplink subframe #8 _{of frequency f 2 of the FDD cell 211 after 4 subframes (215).} At this time, the HARQ-ACK for the two codewords transmitted from the FDD cell is determined as ACK or NACK as decoded by the UE and may be mapped to the table of FIG. 3A, but the two codewords transmitted from the TDD cell are Since it does not exist, each can be mapped to DTX.

For example, the UE's decoding result is ACK and NACK/DTX for two codewords transmitted from the FDD cell 211, and since there is no codeword transmitted from the TDD cell 212, the transmission mode for the two codewords DTX and DTX are set according to, and the UE performs HARQ-ACK transmission using the fifth row 302 from the bottom in the table of FIG. 3A. That is, by mapping 1,0 to b(0)b(1) to n(1)_PUCCH,0 resource, HARQ-ACK is transmitted. The base station decodes b(0)b(1)=1,0 from the n(1)_PUCCH,0 resource, so that the UE ACK, NACK/DTX, and DTX for a total of 4 codewords of the FDD cell and the TDD cell. , It can be seen that DTX was transmitted. At this time, when there is no scheduling for downlink data in a subframe of a TDD cell, since DTX must be set for both the third and fourth columns, when there is no scheduling for downlink data in a subframe of the TDD cell, mappable rows are shown in the figure. It can be seen that it is limited to the line indicated by reference numeral 303. Therefore, when there is no scheduling for downlink data in a subframe of a TDD cell, n(1)_PUCCH,0 resources are used, and n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH ,3 is not used.

In addition, when SORTD (Spatial Orthogonal Resource Transmit Diversity) is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH existing in the table of FIG. 3A are set. In addition to ,3, additional resources n(1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as the upper signal. Accordingly, when there is no scheduling for downlink data in a subframe of a TDD cell, n(1)_PUCCH,0 and n(1)_PUCCH,0' resources are used, and the remaining resources are not used. When the number of terminals to be simultaneously scheduled in the cell of the base station is large and the amount of data to be transmitted to the terminals is not large, the amount of unused resources among the resources set for the PUCCH format increases even more.

Therefore, when a P cell and an S cell are set by the base station, and the P cell and the S cell have different duplex structures or the same duplex structure, while the P cell and the S cell have TDD with the same duplex structure, When the Pcell and the Scell operate according to the same UL-DL configuration, or the Pcell and the Scell operate according to different UL-DL configurations, the UE uses the PUCCH format according to the embodiment of the present invention, and P When there is no scheduling for downlink data in the cell or Scell. Except for n(1)_PUCCH,k (k is one of 0, 1, 2, 3), the remaining resources may be used for PUSCH transmission or PUCCH transmission of any terminal without deteriorating system performance.

That is, the remaining resources can be used for PUSCH transmission or PUCCH transmission of any terminal without deterioration in performance according to the transmission amount of the terminal configured for the PUCCH transmission resource. Alternatively, when SORTD is set, the remaining resources other than n(1)_PUCCH,k and n(1)_PUCCH,k' set as a higher signal can be used for PUSCH transmission or PUCCH transmission of any terminal without deteriorating system performance. And, due to this, system performance can be improved. In the above, k is determined as a resource index determined when DTX is mapped according to a transmission mode of a cell without downlink data scheduling. In the description of FIG. 3A, since the case where there is no downlink data scheduling of the S cell is described, when the HARQ-ACK of the S cell is mapped to DTX according to the transmission mode of the S cell, the resource to be used is n(1)_PUCCH, Since it was 0, k=0.

When an FDD P cell and a TDD S cell according to the eighth embodiment of the present invention are configured, a PUCCH transmission method will be described with reference to FIG. 3A as follows. In the eighth embodiment of FIG. 2G, a transmission mode may be set so that two codewords are transmitted to the FDD cell 261, and a transmission mode may be set so that two codewords are also transmitted to the TDD cell 262. In addition, the UE may transmit the PUCCH based on the PUCCH format according to the eighth embodiment of the present invention. (In the following, a case in which the PUCCH format is “PUCCH format 1b with channel selection” will be described, but an embodiment of the present invention may be applied even when the PUCCH format is different from “PUCCH format 1b with channel selection”.) In this case, FIG. 2G In subframe #1 of the FDD cell 261 and the TDD cell 262, the PDSCH 269 and the PDSCH 270 are respectively scheduled and transmitted, and the HARQ-ACK for them is 4 subframes after the FDD cell 261 It is transmitted in the uplink subframe #5 of the frequency f _{2 (271).} At this time, it is determined whether HARQ-ACK for each of the four codewords is ACK or NACK as decoded by the UE, and is mapped to the table shown in FIG. 3A.

For example, if the result of decoding performed by the UE is ACK and NACK/DTX for two codewords transmitted from the FDD cell 261, and ACK and ACK for two codewords transmitted from the TDD cell 262, The UE performs HARQ-ACK transmission using the second row 301 in the table of FIG. 3A. That is, the UE transmits HARQ-ACK by mapping 0,1 to b(0)b(1) over n(1)_PUCCH,2 resources. Then, the base station decodes b(0)b(1)=0,1 from the n(1)_PUCCH,2 resource, so that the UE ACK, NACK/DTX, and ACK for a total of 4 codewords of the FDD cell and the TDD cell. , It can be seen that the ACK has been transmitted.

Next, the PDSCH 263 is scheduled and transmitted in the FDD cell 261 in subframe #1 of FIG. 2G, and the PDSCH 264 is not scheduled by the determination of the base station in subframe #1 of the TDD cell 262. That is, it is assumed that the PDSCH is not transmitted. Accordingly, HARQ-ACK for the PDSCH is transmitted in uplink subframe #5 _{of frequency f 2 of the FDD cell 261 after 4 subframes (265).} At this time, the HARQ-ACK for the two codewords transmitted from the FDD cell is determined as ACK or NACK as decoded by the UE and may be mapped to the table of FIG. 3A, but the two codewords transmitted from the TDD cell are Since it does not exist, each can be mapped to DTX.

For example, the UE's decoding result is ACK and NACK/DTX for two codewords transmitted from the FDD cell 261, and since there is no codeword transmitted from the TDD cell 262, the transmission mode for the two codewords DTX and DTX are set according to, and the UE performs HARQ-ACK transmission using the fifth row 302 from the bottom in the table of FIG. 3A. That is, by mapping 1,0 to b(0)b(1) to n(1)_PUCCH,0 resource, HARQ-ACK is transmitted. The base station decodes b(0)b(1)=1,0 from the n(1)_PUCCH,0 resource, so that the UE ACK, NACK/DTX, and DTX for a total of 4 codewords of the FDD cell and the TDD cell. , It can be seen that DTX was transmitted. At this time, when there is no scheduling for downlink data in a subframe of a TDD cell, since DTX must be set for both the third and fourth columns, when there is no scheduling for downlink data in a subframe of the TDD cell, mappable rows are shown in the figure. It can be seen that it is limited to the line indicated by reference numeral 303. Therefore, when there is no scheduling for downlink data in a subframe of a TDD cell, n(1)_PUCCH,0 resources are used, and n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH ,3 is not used.

In addition, when SORTD is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3 in addition to n(1)_PUCCH,3 present in the table of FIG. (1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as higher-order signals. Accordingly, when there is no scheduling for downlink data in a subframe of a TDD cell, n(1)_PUCCH,0 and n(1)_PUCCH,0' resources are used, and the remaining resources are not used. When the number of terminals to be simultaneously scheduled in the cell of the base station is large and the amount of data to be transmitted to the terminals is not large, the amount of unused resources among the resources set for the PUCCH format increases even more.

Therefore, when a P cell and an S cell are set by the base station, and the P cell and the S cell have different duplex structures or the same duplex structure, while the P cell and the S cell have TDD with the same duplex structure, When the Pcell and the Scell operate according to the same UL-DL configuration, or the Pcell and the Scell operate according to different UL-DL configurations, the UE uses the PUCCH format according to the embodiment of the present invention, and P When there is no scheduling for downlink data in the cell or Scell. Except for n(1)_PUCCH,k (k is one of 0, 1, 2, 3), the remaining resources may be used for PUSCH transmission or PUCCH transmission of any terminal without deteriorating system performance.

That is, the remaining resources can be used for PUSCH transmission or PUCCH transmission of any terminal without deterioration in performance according to the transmission amount of the terminal configured for the PUCCH transmission resource. Alternatively, when SORTD is set, the remaining resources other than n(1)_PUCCH,k and n(1)_PUCCH,k' set as a higher signal can be used for PUSCH transmission or PUCCH transmission of any terminal without deteriorating system performance. And, due to this, system performance can be improved. In the above, k is determined as a resource index determined when DTX is mapped according to a transmission mode of a cell without downlink data scheduling. In the description of FIG. 3A, since the case where there is no downlink data scheduling of the S cell is described, when the HARQ-ACK of the S cell is mapped to DTX according to the transmission mode of the S cell, the resource to be used is n(1)_PUCCH, Since it was 0, k=0.

When an FDD P cell and a TDD S cell according to the ninth embodiment of the present invention are configured, a PUCCH transmission method will be described with reference to FIG. 3A as follows.

In the ninth embodiment of FIG. 2H, a transmission mode may be set so that two codewords are transmitted to the FDD cell 281, and a transmission mode may be set so that two codewords are also transmitted to the TDD cell 282. In addition, the terminal may transmit the PUCCH based on the PUCCH format according to the ninth embodiment of the present invention. (In the following, a case in which the PUCCH format is “PUCCH format 1b with channel selection” will be described, but an embodiment of the present invention may be applied even when the PUCCH format is different from “PUCCH format 1b with channel selection”.) In this case, FIG. 2H In subframe #0 of, the PDSCH 289 and the PDSCH 290 are respectively scheduled and transmitted in the FDD cell 281 and the TDD cell 282, and the HARQ-ACK for them is 4 subframes after the FDD cell 281 It is transmitted in the uplink subframe #4 of the frequency f _{2 (291).} At this time, it is determined whether HARQ-ACK for each of the four codewords is ACK or NACK as decoded by the UE, and is mapped to the table shown in FIG. 3A.

For example, if the result of decoding performed by the UE is ACK and NACK/DTX for two codewords transmitted from the FDD cell 281, and ACK and ACK for two codewords transmitted from the TDD cell 282, The UE performs HARQ-ACK transmission using the second row 301 in the table of FIG. 3A. That is, the UE transmits HARQ-ACK by mapping 0,1 to n(1)_PUCCH,2 resource b(0)b(1). Then, the base station decodes b(0)b(1)=0,1 from the n(1)_PUCCH,2 resource, so that the UE ACK, NACK/DTX, and ACK for a total of 4 codewords of the FDD cell and the TDD cell. , It can be seen that the ACK has been transmitted.

Next, in subframe #1 of FIG. 2H, the PDSCH 283 is scheduled and transmitted in the FDD cell 281, and subframe #1 of the TDD cell 282 is a special subframe in which the DwPTS 286 has 3 OFDM symbols. Therefore, PDSCH transmission is not performed. Accordingly, the HARQ-ACK for the PDSCH is transmitted in the uplink subframe #5 _{of the frequency f 2 of the FDD cell 281 after 4 subframes (285).} At this time, the HARQ-ACK for the two codewords transmitted from the FDD cell is determined as ACK or NACK as decoded by the UE and may be mapped to the table of FIG. 3A, but the two codewords transmitted from the TDD cell are Since it does not exist, each can be mapped to DTX.

For example, the UE's decoding result is ACK and NACK/DTX for two codewords transmitted from the FDD cell 281, and since there is no codeword transmitted from the TDD cell 282, the transmission mode for the two codewords DTX and DTX are set according to, and the UE performs HARQ-ACK transmission using the fifth row 302 from the bottom in the table of FIG. 3A. That is, by mapping 1,0 to b(0)b(1) on n(1)_PUCCH,0 resource, HARQ-ACK is transmitted. The base station decodes b(0)b(1)=1,0 from the n(1)_PUCCH,0 resource, so that the UE ACK, NACK/DTX, and DTX for a total of 4 codewords of the FDD cell and the TDD cell. , It can be seen that DTX was transmitted. At this time, if the subframe of the TDD cell is an uplink subframe, the third and fourth columns must all be DTX configured, so if the subframe of the TDD cell is a special subframe having DwPTS of 3 OFDM symbols, a mapable row It can be seen that is limited to the line indicated by reference numeral 303. Therefore, when a subframe of a TDD cell is a special subframe having DwPTS of 3 OFDM symbols, n(1)_PUCCH,0 resources are used, and n(1)_PUCCH,1, n(1)_PUCCH,2, n (1)_PUCCH,3 is not used.

In addition, when SORTD is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3 in addition to n(1)_PUCCH,3 present in the table of FIG. (1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as higher-order signals. Therefore, when a subframe of a TDD cell is a special subframe having a DwPTS of 3 OFDM symbols, n(1)_PUCCH,0 and n(1)_PUCCH,0' resources are used, and the remaining resources are not used. When the number of UEs simultaneously scheduled in the cell of the base station is large, and the special subframe configuration of the TDD cell indicates a special subframe having DwPTS of 3 OFDM symbols, among the resources configured for the PUCCH format, the subframe of the TDD cell is In the case of a special subframe having DwPTS of 3 OFDM symbols, the amount of unused resources increases even more.

Therefore, the base station uses the FDD cell as the P cell and the TDD cell as the S cell, the UE uses the PUCCH format according to the embodiment of the present invention, and the subframe of the TDD cell is a special subframe having a DwPTS of 3 OFDM symbols. If it is. The remaining resources other than n(1)_PUCCH,0 may be used for PUSCH transmission or PUCCH transmission of an arbitrary terminal without deteriorating system performance. That is, the remaining resources can be used for PUSCH transmission or PUCCH transmission of any terminal without deterioration in performance according to the transmission amount of the terminal configured for the PUCCH transmission resource. Alternatively, when SORTD is set, the remaining resources other than n(1)_PUCCH,0 and n(1)_PUCCH,0' set as a higher signal can be used for PUSCH transmission or PUCCH transmission of any terminal without deteriorating system performance. And, due to this, system performance can be improved.

In FIG. 3A, a table for applying PUCCH format 1b with channel selection is described as an example when both the FDD P cell and the TDD S cell are set to a transmission mode for performing two codeword transmission. Method is applicable. That is, when only one of the FDD Pcell and TDD Scell is set to two codeword transmission modes, a table for applying PUCCH format 1b with channel selection and one codeword for both FDD Pcell and TDD Scell are transmitted. When the mode is set, it can also be applied to a table for applying PUCCH format 1b with channel selection.

In FIG. 3A, a table for applying PUCCH format 1b with channel selection is described as an example when both the P cell and the S cell are set to a transmission mode for performing two codeword transmission, but the method of FIG. 3A is also described in other cases. Applicable. That is, when only one of the Pcell and Scell is set to two codeword transmission modes, the table for applying PUCCH format 1b with channel selection and both the Pcell and Scell are set to one codeword transmission mode. When present, it can also be applied to a table for applying PUCCH format 1b with channel selection.

When an FDD P cell and an FDD S cell according to the third embodiment of the present invention are configured, a PUCCH transmission method will be described with reference to FIG. 3B as follows. In the third embodiment of FIG. 2C, the transmission mode may be set so that the P cell 221 transmits two codewords, and the transmission mode may be set so that the S cell 222 also transmits two codewords. In addition, the UE may transmit the PUCCH based on the PUCCH format according to the third embodiment of the present invention. (In the following, a case in which the PUCCH format is "PUCCH format 1b with channel selection" will be described, but an embodiment of the present invention may be applied even when the PUCCH format is different from "PUCCH format 1b with channel selection".) In this case, FIG. PDSCH 226 and PDSCH 227 are respectively scheduled and transmitted in subframe #7 of P cell 221 and S cell 222 of 2c, and HARQ-ACK for them is 4 subframes after, P cell 221 ) Is transmitted in the uplink subframe #1 of the frequency f _{2 (228).} At this time, it is determined whether HARQ-ACK for each of the four codewords is ACK or NACK as decoded by the UE, and is mapped to the table shown in FIG. 3B.

For example, if the result of decoding performed by the UE is ACK and NACK/DTX for two codewords transmitted from the P cell 221, and ACK and ACK for two codewords transmitted from the S cell 222, The UE performs HARQ-ACK transmission using the second row 311 in the table of FIG. 3B. That is, the UE transmits HARQ-ACK by mapping 0,1 to b(0)b(1) over n(1)_PUCCH,2 resources. Then, the base station decodes b(0)b(1)=0,1 from the n(1)_PUCCH,2 resource, so that the UE ACK, NACK/DTX, and ACK for a total of 4 codewords of the Pcell and Scell. , It can be seen that the ACK has been transmitted.

Next, the PDSCH 223 is scheduled and transmitted in the Pcell 221 in subframe #0 of FIG. 2C, and the PDSCH 224 is not scheduled according to the determination of the base station in subframe #0 of the Scell 222. Assume Accordingly, HARQ-ACK for the PDSCH is transmitted in uplink subframe #4 _{of frequency f 2 of the Pcell 221 after 4 subframes (225).} At this time, it is determined whether HARQ-ACK for the two codewords transmitted from the Pcell is ACK or NACK as decoded by the UE and can be mapped to the table of FIG. 3B, but the two codewords transmitted from the Scell are Since it does not exist, each can be mapped to DTX.

For example, the UE's decoding result is ACK and NACK/DTX for two codewords transmitted from the Pcell 221, and since there is no codeword transmitted from the Scell 222, the transmission mode for the two codewords DTX and DTX are set according to, and the UE performs HARQ-ACK transmission using the fifth row 312 from the bottom of the table of FIG. 3B. That is, by mapping 1,0 to b(0)b(1) to n(1)_PUCCH,0 resource, HARQ-ACK is transmitted. The base station decodes b(0)b(1)=1,0 from the n(1)_PUCCH,0 resource, so that the UE ACK, NACK/DTX, and DTX for a total of 4 codewords of the Pcell and the Scell. , It can be seen that DTX was transmitted. At this time, if there is no scheduling for downlink data in the subframe of the S cell, all the third and fourth columns must be DTX configured, so if there is no scheduling for the downlink data in the subframe of the S cell, the mapable rows are shown in the figure. It can be seen that it is limited to the line indicated by reference numeral 313. Therefore, when there is no scheduling for downlink data in a subframe of the S cell, n(1)_PUCCH,0 resources are used, and n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH ,3 is not used.

In addition, when SORTD is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3, which are present in the table of FIG. 3B, are additional resources n (1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as higher-order signals. Therefore, when there is no scheduling for downlink data in a subframe of the Scell, n(1)_PUCCH,0 and n(1)_PUCCH,0' resources are used, and the remaining resources are not used. When the number of terminals to be simultaneously scheduled in the cell of the base station is large and the amount of data to be transmitted to the terminals is not large, the amount of unused resources among the resources set for the PUCCH format increases even more.

Therefore, when a Pcell and an Scell are configured by the base station, and the Pcell and Scell have the same duplex structure as FDD, the UE uses the PUCCH format according to the embodiment of the present invention, and in the Pcell or Scell. There is no scheduling for downstream data. All HARQ-ACKs for a cell without scheduling are randomized except for n(1)_PUCCH,k (k is one of 0, 1, 2, 3), all mapped to DTX in Table 3b, without degrading the performance of the system. It can be used for PUSCH transmission or PUCCH transmission of the UE of.

That is, the remaining resources can be used for PUSCH transmission or PUCCH transmission of any terminal without deterioration in performance according to the transmission amount of the terminal configured for the PUCCH transmission resource. Or, when SORTD is configured, the HARQ-ACKs for cells without scheduling are all mapped to DTX in Table 3b, except for n(1)_PUCCH,k and n(1)_PUCCH,k' set as a higher signal. It can be used for PUSCH transmission or PUCCH transmission of an arbitrary terminal without deteriorating system performance, and thus, system performance can be improved. In the above, k is determined as a resource index determined when all HARQ-ACKs corresponding to the cell are mapped to DTX according to the transmission mode of a cell without downlink data scheduling. Since the description of FIG. 3B describes the case where there is no downlink data scheduling of the Scell, when all HARQ-ACKs of the Scell are mapped to DTX according to the transmission mode of the Scell, the resource to be used is n(1)_PUCCH. Since it was ,0, k=0.

In FIG. 3B, a table for applying PUCCH format 1b with channel selection is described as an example when both the Pcell and the Scell are set to a transmission mode for performing two codeword transmissions, but the method of FIG. 3B is also described in other cases. Applicable. That is, when only one of the Pcell and Scell is set to two codeword transmission modes, the table for applying PUCCH format 1b with channel selection and both the Pcell and Scell are set to one codeword transmission mode. When present, the method of FIG. 3B can also be applied to a table for applying PUCCH format 1b with channel selection.

When an FDD P cell and an FDD S cell according to the fourth embodiment of the present invention are configured, a PUCCH transmission method will be described with reference to FIG. 3C as follows. In the fourth embodiment of FIG. 2D, the transmission mode may be set so that the P cell 231 transmits two codewords, and the transmission mode may be set so that the S cell 232 also transmits two codewords. In addition, the UE may transmit the PUCCH based on the PUCCH format according to the fourth embodiment of the present invention. (In the following, a case in which the PUCCH format is "PUCCH format 1b with channel selection" will be described, but an embodiment of the present invention may be applied even when the PUCCH format is different from "PUCCH format 1b with channel selection".) In this case, FIG. PDSCH 236 and PDSCH 237 are respectively scheduled and transmitted in subframe #4 of P cell 231 and S cell 232 of 2d, and HARQ-ACK for them is 4 subframes after, P cell 231 ) Is transmitted in the uplink subframe #8 of the frequency f _{2 (238).} At this time, the HARQ-ACK for each of the four codewords is determined as ACK or NACK as decoded by the UE, and is mapped to the table shown in FIG. 3C.

For example, if the result of decoding performed by the UE is ACK and NACK/DTX for two codewords transmitted from the P cell 231, and ACK and ACK for two codewords transmitted from the S cell 232, The UE performs HARQ-ACK transmission using the second row 321 in the table of FIG. 3C. That is, the UE transmits HARQ-ACK by mapping 0,1 to b(0)b(1) over n(1)_PUCCH,2 resources. Then, the base station decodes b(0)b(1)=0,1 from the n(1)_PUCCH,2 resource, so that the UE ACK, NACK/DTX, and ACK for a total of 4 codewords of the Pcell and Scell. , It can be seen that the ACK has been transmitted.

Next, the PDSCH 234 is scheduled and transmitted in the Scell 232 in subframe #7 of FIG. 2D, and the PDSCH 233 is not scheduled according to the determination of the base station in subframe #7 of the Pcell 231. Assume Accordingly, the HARQ-ACK for the PDSCH is transmitted in the uplink subframe #1 _{of the frequency f 2 of the Pcell 231 after 4 subframes (235).} At this time, the HARQ-ACK for the two codewords transmitted from the S cell is determined as ACK or NACK as decoded by the UE and can be mapped to the table of FIG. 3C, but the two codewords transmitted from the P cell are Since it does not exist, each can be mapped to DTX.

For example, the UE's decoding result is ACK and NACK/DTX for two codewords transmitted from the Scell 232, and since there is no codeword transmitted from the Pcell 231, the transmission mode for the two codewords DTX and DTX are set according to, and the UE performs HARQ-ACK transmission using the eighth row 322 from the top in the table of FIG. 3C. That is, by mapping 1,0 to b(0)b(1) to n(1)_PUCCH,3 resource, HARQ-ACK is transmitted. The base station decodes b(0)b(1)=1,0 from the n(1)_PUCCH,3 resource, so that the UE has DTX, DTX, ACK, and NACK for a total of 4 codewords of the Pcell and the Scell. You can see that /DTX was sent. At this time, if there is no scheduling for downlink data in the subframe of the P cell, both the first and second columns must be DTX configured, so if there is no scheduling for the downlink data in the subframe of the P cell, the mapable rows are shown in the figure. It can be seen that it is limited to the line indicated by reference numeral 323. Therefore, when there is no scheduling for downlink data in a subframe of the Pcell, n(1)_PUCCH,3 resources are used, and n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH ,2 is not used.

In addition, when SORTD is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3 in addition to n(1)_PUCCH,3 present in the table of FIG. (1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as higher-order signals. Therefore, when there is no scheduling for downlink data in a subframe of the Pcell, n(1)_PUCCH,3 and n(1)_PUCCH,3' resources are used, and the remaining resources are not used. When the number of terminals to be simultaneously scheduled in the cell of the base station is large and the amount of data to be transmitted to the terminals is not large, the amount of unused resources among the resources set for the PUCCH format increases even more.

Therefore, when a Pcell and an Scell are configured by the base station, and the Pcell and Scell have the same duplex structure as FDD, the UE uses the PUCCH format according to the embodiment of the present invention, and in the Pcell or Scell. There is no scheduling for downstream data. All of the HARQ-ACKs for a cell without scheduling except for n(1)_PUCCH,k (k is one of 0, 1, 2, 3), all mapped to DTX in Table 3c, are random without deteriorating the performance of the system. It can be used for PUSCH transmission or PUCCH transmission of the UE of.

That is, the remaining resources can be used for PUSCH transmission or PUCCH transmission of any terminal without deterioration in performance according to the transmission amount of the terminal configured for the PUCCH transmission resource. Or, when SORTD is configured, the HARQ-ACKs for cells without scheduling are all mapped to DTX in Table 3c, except for n(1)_PUCCH,k and n(1)_PUCCH,k' set as a higher signal. It can be used for PUSCH transmission or PUCCH transmission of an arbitrary terminal without deteriorating system performance, and thus, system performance can be improved. In the above, k is determined as a resource index determined when all HARQ-ACKs corresponding to the cell are mapped to DTX according to the transmission mode of a cell without downlink data scheduling. In the description of FIG. 3C, since the case where there is no downlink data scheduling of the Pcell is described, when all HARQ-ACKs of the Pcell are mapped to DTX according to the transmission mode of the Pcell, the resource to be used is n(1)_PUCCH. ,3, so k=3.

In FIG. 3C, a table for applying PUCCH format 1b with channel selection is described as an example when both the P cell and the S cell are set to a transmission mode for performing two codeword transmission. However, in other cases, the method of FIG. 3C is also described. Applicable. That is, when only one of the Pcell and Scell is set to two codeword transmission modes, the table for applying PUCCH format 1b with channel selection and both the Pcell and Scell are set to one codeword transmission mode. When present, the method of FIG. 3C can be applied to a table for applying PUCCH format 1b with channel selection.

When a TDD P cell and a TDD S cell according to the fifth embodiment of the present invention are configured, a PUCCH transmission method will be described with reference to FIG. 3D as follows. The UE may transmit the PUCCH based on the PUCCH format according to the fifth embodiment of the present invention. (In the following, a case in which the PUCCH format is "PUCCH format 1b with channel selection" will be described, but an embodiment of the present invention may be applied even when the PUCCH format is different from "PUCCH format 1b with channel selection".) In this case, FIG. PDSCHs 246 and PDSCHs 247 are respectively scheduled and transmitted in subframes #0, #1, and #3 of the P cell 241 and the S cell 242 of 2e, and the HARQ-ACK for them is P It is transmitted in the uplink subframe #7 of the P cell according to the uplink control channel transmission timing in the TDD UL-DL configuration #1 of the cell (248). At this time, as the HARQ-ACK for PDSCHs in each subframe is decoded by the UE, it is determined whether it is ACK or NACK, and is mapped to the table shown in FIG. 3D. For convenience, in this embodiment, it is assumed that the transmission mode of each TDD cell is all set to one codeword transmission mode.

For example, the decoding result of the UE is ACK, NACK/DTX, and ACK for each codeword transmitted in subframes #0, #1, and #3 of the P cell 241, and sub-frames of the S cell 242 In the case of ACK, ACK, and ACK for each codeword transmitted in frames #0, #1, and #3, the UE performs HARQ-ACK transmission using the third row 331 in the table of FIG. 3D. That is, the UE transmits HARQ-ACK by mapping 1,1 to n(1)_PUCCH,3 resource b(0)b(1). Then, the base station decodes b(0)b(1)=1,1 from n(1)_PUCCH,3 resources, so that the terminal codes in subframes #0, #1, and #3 of the Pcell and Scell. For this, it can be seen that ACK, NACK/DTX, any, ACK, ACK, and ACK were transmitted in the order of P cell and S cell.

Next, PDSCHs 243 are scheduled and transmitted in subframes #0, #1, and #3 of the Pcell 241 of FIG. 2E, and subframes #0, #1, and #3 of the Scell 242 are It is assumed that PDSCHs 244 are not scheduled at all according to the determination of the base station. Accordingly, the HARQ-ACK for the PDSCH is transmitted in the uplink subframe #7 of the Pcell according to the uplink control channel transmission timing in the TDD UL-DL configuration #1 of the Pcell (245). At this time, the HARQ-ACK for the three codewords transmitted from the P cell is determined whether it is ACK or NACK as decoded by the UE and can be mapped to the table of FIG. 3D, but the three codewords transmitted from the S cell are Since it does not exist, each can be mapped to DTX.

For example, the decoding result of the terminal is ACK, NACK/DTX, and ACK for the codewords transmitted in subframes #0, #1, and #3 of the Pcell 241, respectively, and the subframe of the Scell 242 Since there is no codeword transmitted in #0, #1, #3, DTX, DTX, and DTX are set for each subframe #0, #1, and #3, and the third row (332) from the bottom in the table of FIG. 3D is used. Thus, the UE performs HARQ-ACK transmission. That is, HARQ-ACK is transmitted by mapping 1,1 to b(0)b(1) on n(1)_PUCCH,0 resource. The base station decodes b(0)b(1)=1,1 from the n(1)_PUCCH,0 resource, so that the UE is the codeword in each subframe #0, #1, #3 of the Pcell and the Scell. For, it can be seen that ACK, NACK/DTX, any, NACK/DTX, any, any were transmitted in the order of P cell and S cell. At this time, if there is no scheduling for downlink data in subframes #0, #1, #3 of the S cell, all HARQ-ACK(i) corresponding to the S cell must be DTX configured, so in the subframe of the S cell When there is no scheduling for downlink data, it can be seen that the mappable rows are limited to the rows indicated by reference numeral 333. Therefore, when there is no scheduling for downlink data in a subframe of the S cell, n(1)_PUCCH,0, n(1)_PUCCH,1 resources are used, and n(1)_PUCCH,2, n(1)_PUCCH ,3 is not used.

In addition, when SORTD is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3, which are present in the table of FIG. (1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as higher-order signals. Therefore, when there is no scheduling for downlink data in a subframe of the S cell, n(1)_PUCCH,0, n(1)_PUCCH,1 and n(1)_PUCCH,0', n(1)_PUCCH,1' Resources are used, and the rest of the resources are not used. When the number of terminals to be simultaneously scheduled in the cell of the base station is large and the amount of data to be transmitted to the terminals is not large, the amount of unused resources among the resources set for the PUCCH format increases even more.

Therefore, when a Pcell and an Scell are configured by the base station, and the Pcell and Scell have the same duplex structure as TDD, the UE uses the PUCCH format according to the embodiment of the present invention, and in the Pcell or Scell. There is no scheduling for downstream data. HARQ-ACKs for cells without scheduling are all mapped to DTX in Table 3d, except for n(1)_PUCCH,k (k is one of 0, 1, 2, 3, and k is a plurality). It can be used for PUSCH transmission or PUCCH transmission of any terminal without deteriorating system performance.

That is, the remaining resources can be used for PUSCH transmission or PUCCH transmission of any terminal without deterioration in performance according to the transmission amount of the terminal configured for the PUCCH transmission resource. Or, when SORTD is configured, all HARQ-ACKs for a cell without scheduling are mapped to DTX in Table 3d, except for n(1)_PUCCH,k and n(1)_PUCCH,k' set as a higher signal. It can be used for PUSCH transmission or PUCCH transmission of an arbitrary terminal without deteriorating system performance, and thus, system performance can be improved. In the above, k is determined as a resource index determined when all HARQ-ACKs corresponding to the cell are mapped to DTX in a cell without downlink data scheduling. In the description of FIG. 3D, since the case where there is no downlink data scheduling of the S cell is described, when all HARQ-ACKs of the S cell are mapped to DTX, the resources to be used are n(1)_PUCCH,0, n(1). Since it was _PUCCH,1, k=0, 1.

In FIG. 3D, a table for applying PUCCH format 1b with channel selection is described as an example when codeword transmission is performed for three subframes in both the Pcell and the Scell, but the method of FIG. 3D is also applied in other cases. It is possible. For example, when codeword transmission is performed for two subframes among Pcell and Scell, a table for applying PUCCH format 1b with channel selection and codeword transmission for four subframes of both Pcell and Scell are performed. When performing, the method of FIG. 3D may be applied to a table for applying PUCCH format 1b with channel selection.

When a TDD P cell and a TDD S cell according to the sixth embodiment of the present invention are configured, a PUCCH transmission method will be described with reference to FIG. 3E as follows. The UE may transmit the PUCCH based on the PUCCH format according to the sixth embodiment of the present invention. (In the following, a case in which the PUCCH format is "PUCCH format 1b with channel selection" will be described, but an embodiment of the present invention may be applied even when the PUCCH format is different from "PUCCH format 1b with channel selection".) In this case, FIG. PDSCHs 256 and PDSCHs 257 are respectively scheduled and transmitted in subframes #0, #1, and #3 of P cell 251 and S cell 252 of 2f, and HARQ-ACK for them is P It is transmitted in the uplink subframe #7 of the P cell according to the uplink control channel transmission timing in the TDD UL-DL configuration #1 of the cell (258). At this time, as the HARQ-ACK for PDSCHs in each subframe is decoded by the UE, it is determined whether it is ACK or NACK, and is mapped to the table shown in FIG. 3E. For convenience, in this embodiment, it is assumed that the transmission mode of each TDD cell is all set to one codeword transmission mode.

For example, the decoding result of the UE is ACK, NACK/DTX, and ACK for each codeword transmitted in subframes #0, #1, and #3 of the P cell 251, and sub-frames of the S cell 252 In the case of ACK, ACK, and ACK for each codeword transmitted in frames #0, #1, and #3, the UE performs HARQ-ACK transmission using the third row 341 in the table of FIG. 3E. That is, the UE transmits HARQ-ACK by mapping 1,1 to b(0)b(1) over n(1)_PUCCH,3 resources. Then, the base station decodes b(0)b(1)=1,1 from n(1)_PUCCH,3 resources, so that the terminal codes in subframes #0, #1, and #3 of the Pcell and Scell. For this, it can be seen that ACK, NACK/DTX, any, ACK, ACK, and ACK were transmitted in the order of P cell and S cell.

Next, PDSCHs 254 are scheduled and transmitted in subframes #0, #1, and #3 of the Scell 251 of FIG. 2F, and subframes #0, #1, and #3 of the Pcell 252 are It is assumed that the PDSCHs 253 are not scheduled at all according to the determination of the base station. Accordingly, the HARQ-ACK for the PDSCH is transmitted in the uplink subframe #7 of the Pcell according to the uplink control channel transmission timing in the TDD UL-DL configuration #1 of the Pcell (255). At this time, it is determined whether HARQ-ACK for the three codewords transmitted from the S cell is ACK or NACK as decoded by the UE and can be mapped to the table of FIG. 3E, but the three codewords transmitted from the P cell are Since it does not exist, each can be mapped to DTX.

For example, the decoding result of the UE is ACK, NACK/DTX, and ACK for the codewords transmitted in subframes #0, #1, and #3 of the Scell 252, respectively, and the subframe of the Pcell 251 Since there is no codeword transmitted in #0, #1, #3, DTX, DTX, DTX are set for each subframe #0, #1, #3, and the sixth row (342) from the bottom in the table of Fig. 3e is used. Thus, the UE performs HARQ-ACK transmission. That is, HARQ-ACK is transmitted by mapping 0,0 to b(0)b(1) on n(1)_PUCCH,2 resources. The base station decodes b(0)b(1)=0,0 from the n(1)_PUCCH,2 resource, so that the terminal codes in subframes #0, #1, and #3 of the Pcell and Scell. For this, it can be seen that NACK/DTX, any, any, ACK, NACK/DTX, any were transmitted in the order of P cell and S cell. At this time, if there is no scheduling for downlink data in subframes #0, #1, and #3 of the P cell, all HARQ-ACK(i) corresponding to the P cell must be DTX configured, so in the subframe of the P cell It can be seen that when there is no scheduling for downlink data, the mappable row is limited to the row indicated by reference numeral 343. Therefore, when there is no scheduling for downlink data in a subframe of the Pcell, n(1)_PUCCH,2, n(1)_PUCCH,3 resources are used, and n(1)_PUCCH,0, n(1)_PUCCH ,1 is not used.

In addition, when SORTD is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3, and n, which are additional resources, are present in the table of FIG. 3E. (1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as higher-order signals. Therefore, when there is no scheduling for downlink data in a subframe of the Pcell, n(1)_PUCCH,2, n(1)_PUCCH,3 and n(1)_PUCCH,2', n(1)_PUCCH,3' Resources are used, and the rest of the resources are not used. When the number of terminals to be simultaneously scheduled in the cell of the base station is large and the amount of data to be transmitted to the terminals is not large, the amount of unused resources among the resources set for the PUCCH format increases even more.

Therefore, when a Pcell and an Scell are configured by the base station, and the Pcell and Scell have the same duplex structure as TDD, the UE uses the PUCCH format according to the embodiment of the present invention, and in the Pcell or Scell. There is no scheduling for downstream data. HARQ-ACKs for cells without scheduling are all mapped to DTX in Table 3e, except for n(1)_PUCCH,k (k is one of 0, 1, 2, 3, and k is a plurality of possible). It can be used for PUSCH transmission or PUCCH transmission of any terminal without deteriorating system performance.

That is, the remaining resources can be used for PUSCH transmission or PUCCH transmission of any terminal without deterioration in performance according to the transmission amount of the terminal configured for the PUCCH transmission resource. Or, when SORTD is configured, all HARQ-ACKs for a cell without scheduling are mapped to DTX in Table 3e, except for n(1)_PUCCH,k and n(1)_PUCCH,k' set as a higher signal. It can be used for PUSCH transmission or PUCCH transmission of an arbitrary terminal without deteriorating system performance, and thus, system performance can be improved. In the above, k is determined as a resource index determined when all HARQ-ACKs corresponding to the cell are mapped to DTX in a cell without downlink data scheduling. Since the description of FIG. 3E describes the case where there is no downlink data scheduling of the Pcell, when all HARQ-ACKs of the Pcell are mapped to DTX, the resources to be used are n(1)_PUCCH,2, n(1). Since it was _PUCCH,3, k=2,3.

In FIG. 3E, a table for applying PUCCH format 1b with channel selection is described as an example when codeword transmission is performed for three subframes in both the P cell and the S cell, but the method of FIG. 3E is also applied in other cases. It is possible. For example, when codeword transmission is performed for two subframes among Pcell and Scell, a table for applying PUCCH format 1b with channel selection and codeword transmission for four subframes of both Pcell and Scell are performed. When performing, the method of FIG. 3E may be applied to a table for applying PUCCH format 1b with channel selection.

When a TDD P cell and a TDD S cell according to the seventh embodiment of the present invention are configured, a PUCCH transmission method will be described with reference to FIG. 3F as follows. UEs may transmit PUCCH based on the PUCCH format according to the seventh embodiment of the present invention. (In the following, a case in which the PUCCH format is "PUCCH format 1b with channel selection" will be described, but an embodiment of the present invention can be applied even when the PUCCH format is different from "PUCCH format 1b with channel selection".) From a system point of view In the PUCCH transmission resource can be set to a plurality of terminals. For example, a transmission resource may be shared and set between terminal 1 according to the third embodiment (terminals without scheduling in the S cell) and terminal 2 (terminals without scheduling in the P cell) according to the fourth embodiment. That is, UE 1 according to the third embodiment uses only n(1)_PUCCH,0 resource 352 when transmitting HARQ-ACK, and UE 2 according to the fourth embodiment uses n(1)_PUCCH when transmitting HARQ-ACK. ,3 use the resource 351. At this time, the base station is n(1)_PUCCH,0 of n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3 to be set for one terminal. May be set to UE 1, and n(1)_PUCCH,3 to UE 2.

In addition, when SORTD is set, n(1)_PUCCH,0, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH,3 in addition to n(1)_PUCCH,3 present in the table of FIG. (1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' are set as higher-order signals. At this time, the base station is among n(1)_PUCCH,0', n(1)_PUCCH,1', n(1)_PUCCH,2', n(1)_PUCCH,3' that should be set to one terminal, n( 1)_PUCCH,0' can be set for terminal 1, and n(1)_PUCCH,3' can be set for terminal 2.

In FIG. 3F, a table for applying PUCCH format 1b with channel selection is described as an example when the P cell and the S cell are FDD cells and both are set to a transmission mode performing two codeword transmission. The method of 3f is applicable. That is, when only one of the Pcell and Scell is set to two codeword transmission modes, the table for applying PUCCH format 1b with channel selection and both the Pcell and Scell are set to one codeword transmission mode. When present, it can also be applied to a table for applying PUCCH format 1b with channel selection. In addition, when both the P cell and the S cell are TDD cells and both the P cell and the S cell perform codeword transmission for 2, 3, or 4 subframes, PUCCH format 1b with channel selection The method of Fig. 3f can be applied to the table, respectively.

Next, with reference to FIGS. 4A and 4B, an embodiment of using the PUCCH transmission resource set for a specific terminal for other purposes will be described in more detail.

4A and 4B show that a subframe of a TDD Scell is an uplink subframe, or a subframe of a TDD Scell is a special subframe in which PDSCH cannot be transmitted, or a Pcell according to an embodiment of the present invention. Or, when there is no data scheduling in the S cell, a diagram showing an example of using the set control channel transmission resources for other purposes.

4A, a PUCCH transmission resource region 401 includes n(1)_PUCCH,0(402) and n(1)_PUCCH,1(403) set for PUCCH transmission. Here, when the subframe of the TDD Scell is an uplink subframe, n(1)_PUCCH,1(403) excluding n(1)_PUCCH,0(402) are Can be used.

4B shows a PUCCH transmission resource region 411 and a PDCCH logical resource region 412 indicating a PDCCH Control Channel Element (CCE) index that determines a PUCCH transmission resource. 4B, when a subframe of a TDD S cell is an uplink subframe, n(1)_PUCCH,1, n(1)_PUCCH,2, n(1)_PUCCH excluding n(1)_PUCCH,0 PDCCH transmission (413, 414, 415) for the terminals may be performed by the base station so that ,3 is determined for PUCCH transmission of any terminals.

5A is a flowchart illustrating an operation of a base station for resource allocation according to the first embodiment of the present invention.

Referring to FIG. 5A, in step 501, the base station configures frequency aggregation having different doubles modes to the terminal. When the base station additionally configures the TDD Scell to the terminal having the FDD Pcell, as an example, the PUCCH format 1b with channel selection is configured as a PUCCH transmission format for the terminal.

In step 502, the base station determines whether subframe n of the TDD Scell is an uplink subframe, and in case of the uplink frame, the base station proceeds to step 503. In step 503, the base station except for n(1)_PUCCH,0 (n(1)_PUCCH,0, n(1)_PUCCH,0') set for PUCCH format 1b with channel selection in subframe n in step 503 In order to use the region corresponding to the PUCCH resource for PUSCH transmission or PUCCH transmission of a certain terminal, the base station performs PDCCH transmission for scheduling a PDSCH or PDCCH transmission for scheduling a PUSCH to the random terminal.

5B is a flowchart illustrating an operation of a base station for resource allocation according to the second to eighth embodiments of the present invention.

Referring to FIG. 5B, in step 511, the base station sets frequency aggregation having different doubles mode or the same doubles mode to the terminal. Here, when the base station additionally configures an S cell to a terminal having a P cell, as an example, a PUCCH format 1b with channel selection is configured as a PUCCH transmission format for the terminal.

In step 512, the base station determines whether to schedule downlink data in subframe n of one of the Pcell and Scell, and if there is no downlink data scheduling, the base station proceeds to step 513. In step 513, the base station has the rest except n(1)_PUCCH,k (n(1)_PUCCH,k, n(1)_PUCCH,k') set for PUCCH format 1b with channel selection in subframe n in step 513. In order to use the region corresponding to the PUCCH resource for PUSCH transmission or PUCCH transmission of a certain terminal, the base station performs PDCCH transmission for scheduling a PDSCH or PDCCH transmission for scheduling a PUSCH to the random terminal.

5C is a flowchart illustrating an operation of a base station for resource allocation according to the ninth embodiment of the present invention.

Referring to FIG. 5C, in step 521, the base station sets frequency aggregation having different doubles mode or the same doubles mode to the terminal. When the base station additionally configures an S cell to a terminal having a P cell, the base station sets PUCCH format 1b with channel selection as an example of a PUCCH transmission format for the terminal through an upper signal.

In step 522, the base station determines whether subframe n of the TDD Scell is a special subframe having a DwPTS of 3 OFDM symbols, and in case of the subframe, proceeds to step 523. The determination in step 522 may be made at a time when the special subframe setting is transmitted to the terminal or at a time when the special subframe setting is determined by the base station. The base station excludes n(1)_PUCCH,0 (n(1)_PUCCH,0, n(1)_PUCCH,0') set for PUCCH format 1b with channel selection in subframe n in step 523. In order to use the region corresponding to the remaining PUCCH resources for PUSCH transmission or PUCCH transmission of a certain terminal, the base station performs PDCCH transmission for scheduling a PDSCH or PDCCH transmission for scheduling a PUSCH to the random terminal.

6 is an internal configuration diagram of a base station according to an embodiment of the present invention.

6, a base station includes a PDCCH block 605, a PDSCH block 616, a PHICH block 624, a transmitter including a multiplexer 615, a PUSCH block 630, a PUCCH block 639, and a demultiplexer. It includes a controller 601 and a scheduler 603 that control the reception unit including 649 and the DL/UL HARQ-ACK transmission/reception timing, and controlling the use of PUCCH transmission resources already set for a specific terminal for other purposes.

Here, the DL/UL HARQ-ACK transmission/reception timing includes both PUCCH transmission timing for PDSCH transmission and PUSCH timing for PDCCH transmission, and the operation of using the PUCCH transmission resource already set for a specific terminal for other purposes is an embodiment of the present invention. It is assumed to include the operation of the base station according to. For transmission/reception in a plurality of cells, there may be a plurality of transmitters and receivers (except for PUCCH blocks), but for explanation, it will be described as an example that one transmitter and one receiver each exist.

The controller 601, which controls the DL/UL HARQ-ACK transmission/reception timing and uses the PUCCH transmission resource already set for a specific terminal for other purposes, performs scheduling by referring to the amount of data to be transmitted to the terminal and the amount of resources available in the system. Scheduler 603, PDCCH block 605, PDSCH block 616, PHICH block 624, PUSCH block 630, PUCCH block 639 by adjusting the timing relationship between physical channels for the desired terminal. ) To control. The DL/UL HARQ-ACK transmission/reception timing and a method of using a PUCCH transmission resource already configured for a specific terminal for other purposes follows the method described in a specific embodiment of the present invention. The PDCCH block 605 is controlled by the scheduler 603 to configure control information to use the PUCCH transmission resource already set for a specific terminal for other purposes as described in the embodiment of the present invention, and the control information is a multiplexer ( 615) is multiplexed with other signals.

The PDSCH block 616 generates data under the control of the scheduler 603, and the data is multiplexed with other signals in the multiplexer 615.

The PHICH block 624 generates HARQ ACK/NACK for the PUSCH received from the terminal under the control of the scheduler 603. The HARQ ACK/NACK is multiplexed with other signals in the multiplexer 615.

In addition, the multiplexed signals are generated as OFDM signals and transmitted to the terminal.

In the receiver, the PUSCH block 630 acquires PUSCH data for a signal received from the terminal. Controller 601 that notifies the scheduler 603 of the error of the decoding result of the PUSCH data to adjust the generation of downlink HARQ ACK/NACK, and controls the DL/UL HARQ-ACK transmission/reception timing of the error of the decoding result. ) To adjust the downlink HARQ ACK/NACK transmission timing.

The PUCCH block 630 acquires an uplink ACK/NACK or CQI from a signal received from the terminal according to the DL/UL HARQ-ACK transmission/reception timing. The obtained uplink ACK/NACK or CQI is applied to the scheduler 603 and used to determine whether to retransmit the PDSCH and to determine whether or not to retransmit the PDSCH and the Modulation and Coding Scheme (MCS). In addition, the acquired uplink ACK/NACK is applied to the controller 601 to adjust the transmission timing of the PDSCH.

The terminal has a receiving unit corresponding to the transmitting unit of the base station and a transmitting unit corresponding to the receiving unit of the base station. Specifically, the reception unit of the terminal includes a demultiplexer, a PDCCH block, a PDSCH block, and a PHICH block, and the transmission unit of the terminal includes a PUSCH block, a PUCCH block, and a multiplexer. The controller of the terminal may control the transmission unit and the reception unit to use the PUCCH transmission resource set for a specific terminal for different purposes according to the UL/DL HARQ-ARQ transmission/reception timing of the base station.

Embodiments of the present invention provide a method and apparatus for allocating resources of a base station in a frequency integrated system. Through this, the base station sets a control channel format for transmitting feedback on downlink data to the terminal, sets a resource to transmit the control channel format to the terminal based on the set control channel format, and establishes different duplex structures. When scheduling downlink data of cells having or having the same double structure, when there is no scheduling in a specific cell, a subframe of a specific cell is an uplink subframe, or a subframe of a specific cell is a special subframe in which PDSCH is not transmitted, The set control channel transmission resource can be used for transmission of a control channel or uplink data transmission of an arbitrary terminal in a cell without deteriorating the performance of the system.

Meanwhile, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined by the scope of the claims to be described later, as well as the scope and equivalents of the claims.

Claims (27)

In a method for allocating resources by a base station in a frequency integrated system,
Configuring the first cell and the second cell to the first terminal;
The process of identifying at least one second subframe of the first cell and at least one third subframe of the second cell-The at least one second subframe is received in the first subframe of the first cell Associated with the feedback information to be made-;
Determining whether there is downlink data transmission in at least one third subframe of the second cell; And
When there is no downlink data transmission in at least one third subframe of the second cell, allocating a frequency resource other than the frequency resource used for transmission of the feedback information in the first subframe to the second terminal Resource allocation method by a base station in a frequency integrated system including the process of determining.
delete delete delete The method of claim 1, wherein the determining whether there is downlink data transmission comprises: the second cell has a time division duplex (TDD) structure, and the at least one third subframe is an uplink subframe. In the case of, the resource allocation method by the base station in a frequency integrated system comprising the step of determining that there is no downlink data transmission in the at least one third subframe. The method of claim 1, wherein the determining whether there is downlink data transmission is in the at least one third subframe when downlink data transmission is not scheduled in the at least one third subframe. A method of allocating resources by a base station in a frequency integrated system including determining that there is no downlink data transmission. The method of claim 6, wherein when the second cell has a time division duplex (TDD) structure, the at least one third subframe is a downlink subframe or a downlink pilot time slot (DwPTS), a guard period (GP) and a special subframe including an uplink pilot time slot (UpPTS)-the length of the DwPTS is greater than or equal to the minimum length capable of downlink data transmission -, and
When the second cell has a frequency division duplex (FDD) structure, the at least one third subframe is a subframe on a downlink frequency. The method of claim 1, wherein the step of determining whether there is downlink data transmission is that the second cell has a time division duplex (TDD) structure, and the at least one third subframe has a downlink pilot time. When including a slot (DwPTS), a guard period (GP) and an uplink pilot time slot (UpPTS) and the length of the DwPTS is shorter than the minimum length capable of downlink data transmission, downlink to the at least one third subframe A method of allocating resources by a base station in a frequency integrated system including determining that there is no data transmission. The method of claim 8, further comprising transmitting information on the length of the DwPTS to the first terminal through high layer signaling. The method of claim 8, wherein the length of the DwPTS, the length of the GP, and the length of the UpPTS are determined based on special subframe configuration information. The method of claim 1, wherein the first cell is allocated resources by a base station in a frequency integrated system having any one of a frequency division duplex (FDD) structure and a time division duplex (TDD) structure. Way. The method of claim 1, further comprising transmitting control information indicating the frequency resource to the second terminal in the first subframe allocated to the second terminal. . The base station of claim 1, further comprising receiving feedback information corresponding to data transmitted in at least one second subframe of the first cell in a first subframe of the first cell. Resource allocation method by. The method of claim 12, wherein the feedback information comprises hybrid automatic repeat request (HARQ) feedback corresponding to data transmitted in at least one second subframe of the first cell and at least one third subframe of the second cell. A method of allocating resources by a base station in a frequency integrated system including data transmitted in. The method of claim 12, wherein the feedback information comprises a decoding result related to data transmitted in at least one second subframe of the first cell and a discontinuity related to data transmitted in at least one third subframe of the second cell. A resource allocation method by a base station in a frequency integrated system including bits of hybrid automatic repeat request (HARQ) feedback mapped to transmission (DTX). In the apparatus for allocating resources of a base station in a frequency integrated system,
A transceiver configured to communicate wireless signals with the first terminal and the second terminal; And
Configure the first cell and the second cell to the first terminal,
At least one second subframe of the first cell and at least one third subframe of the second cell are identified-the at least one second subframe is to be received in the first subframe of the first cell Associated with feedback information -,
Determining whether there is downlink data transmission in at least one third subframe of the second cell; And
When there is no downlink data transmission in at least one third subframe of the second cell, allocating a frequency resource other than the frequency resource used for transmission of the feedback information in the first subframe to the second terminal An apparatus for allocating resources of a base station in a frequency integrated system comprising at least one processor configured to determine. The method of claim 16, wherein the at least one processor comprises the at least one processor when the second cell has a Time Division Duplex (TDD) structure and the at least one third subframe is an uplink subframe. An apparatus for allocating resources of a base station in a frequency integrated system further configured to determine that there is no downlink data transmission in a third subframe. The method of claim 16, wherein when the downlink data transmission is not scheduled in the at least one third subframe, the at least one processor determines that there is no downlink data transmission in the at least one third subframe. An apparatus for allocating resources of a base station in a frequency integrated system further configured to determine. The method of claim 18, wherein when the second cell has a time division duplex (TDD) structure, the at least one third subframe is a downlink subframe or a downlink pilot time slot (DwPTS), a guard period (GP) and a special subframe including an uplink pilot time slot (UpPTS)-the length of the DwPTS is greater than or equal to the minimum length capable of downlink data transmission -, and
When the second cell has a frequency division duplex (FDD) structure, the at least one third subframe is a subframe on a downlink frequency, an apparatus for allocating resources of a base station in a frequency integrated system. The method of claim 16, wherein the at least one processor has a time division duplex (TDD) structure in the second cell, and a downlink pilot time slot (DwPTS) and a guard period in the at least one third subframe Including (GP) and uplink pilot time slot (UpPTS) and when the length of the DwPTS is shorter than the minimum length in which downlink data transmission is possible, to determine that there is no downlink data transmission in the at least one third subframe An apparatus for allocating resources of a base station in a further configured frequency integration system. 21. The apparatus of claim 20, wherein the transceiver is further configured to transmit information on the length of the DwPTS to the first terminal through high layer signaling. The apparatus of claim 20, wherein the length of the DwPTS, the length of the GP, and the length of the UpPTS are determined based on special subframe configuration information. The method of claim 20, wherein the first cell allocates resources of a base station in a frequency integrated system having any one of a frequency division duplex (FDD) structure and a time division duplex (TDD) structure. Device for doing. The method of claim 16, wherein the transceiver allocates resources of a base station in a frequency integrated system further configured to transmit control information indicating the frequency resource to the second terminal in the first subframe allocated to the second terminal. Device for doing. The frequency integrated system of claim 16, wherein the transceiver is further configured to receive feedback information corresponding to data transmitted in at least one second subframe of the first cell in a first subframe of the first cell. An apparatus for allocating resources of a base station. The method of claim 16, wherein the feedback information comprises hybrid automatic repeat request (HARQ) feedback corresponding to data transmitted in at least one second subframe of the first cell and at least one third subframe of the second cell. An apparatus for allocating resources of a base station in a frequency integrated system including data transmitted from The method of claim 16, wherein the feedback information comprises a decoding result related to data transmitted in at least one second subframe of the first cell and a discontinuity related to data transmitted in at least one third subframe of the second cell. An apparatus for allocating resources of a base station in a frequency integrated system including bits of hybrid automatic repeat request (HARQ) feedback mapped to transmission (DTX).

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