KR102228177B1 - Method and apparatus for transmitting control information in carrier aggregation system - Google Patents

Abstract

In the present invention, when multiple uplink carriers support uplink control channel transmission in a carrier aggregation system, when multiple uplink control channel transmission and uplink data channel transmission occur in the same subframe, uplink control information is converted to uplink data. It relates to a method and apparatus for transmitting by inserting into a channel.

Description

Method and apparatus for transmitting control information in a carrier aggregation system {METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN CARRIER AGGREGATION SYSTEM}

The present invention relates to a cellular wireless communication system, and more particularly, to a method and apparatus for transmitting a control channel in a carrier integrated 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 lack of resources and a demand for high-speed service from users.

Long Term Evolution-Advanced (hereinafter referred to as LTE-A) system developed based on the Long Term Evolution (hereinafter referred to as LTE) system in 3GPP (The 3rd Generation Partnership Project) is based on high-speed packets with a transmission speed of up to 1 Gbps. It is a technology that implements communication. LTE-A supports a carrier aggregation system that can communicate with a base station using a plurality of carriers by expanding the number of cells to which the terminal is connected, and all cells extended to the terminal are the same duplex. It has a structure. Therefore, all the cells may have a frequency division duplex (Frequency Division Duplex, hereinafter referred to as FDD) structure, or may have a time division duplex (Time Division Duplex, hereinafter referred to as TDD) structure. TDD may be a static TDD structure in which UL-DL configuration is maintained, or a dynamic TDD structure in which UL-DL configuration is changed by system information, an upper signal, or a downlink common control channel.

If one cell controlled by the base station has an FDD structure and one frequency band is added, it is easy to apply the TDD structure to the one frequency band. The reason is that in order to operate FDD, two different frequency bands are required for each of the downlink (DL) and the uplink (UL). Accordingly, 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, a method for transmitting a control channel for data transmitted from a plurality of cells is required.

In addition, in LTE-A, the number of cells to which the terminal accesses is expanded, and feedback generated in each cell is transmitted only in a primary cell (primary cell or Pcell, hereinafter referred to as a P cell). To further explain, when a terminal that can support only one carrier in uplink and a terminal that can support multiple carriers in uplink coexist, in the case of a terminal that can support only one uplink carrier, only one uplink carrier is used. Thus, an uplink control channel can be transmitted. Therefore, the number of terminals capable of supporting a plurality of carriers in the base station is not large, and in terms of defining a standard for supporting all terminals, a method of transmitting feedback generated in downlink of each cell only in the P cell was adopted. In LTE-A, when uplink control channel transmission and uplink data channel transmission occur in the same subframe, uplink control information transmitted in the uplink control channel is embedded and transmitted in the uplink data channel.

However, when the number of terminals supporting a plurality of uplink carriers increases, it is necessary to support uplink control channel transmission in a plurality of uplink carriers. In addition, transmission of a plurality of uplink control channels occurs, so that uplink data channel transmission and When overlapping, there is a need for a technique for inserting and transmitting uplink control information transmitted in a plurality of uplink control channels into an uplink data channel.

The present invention has been proposed to solve the above-described problem. In an embodiment of the present invention, when multiple uplink carriers support uplink control channel transmission in a carrier aggregation system, multiple uplink control channel transmission and uplink control channel transmission are provided. An object of the present invention is to provide a method and apparatus for transmitting by inserting uplink control information into an uplink data channel when data channel transmission occurs in the same subframe.

In order to solve the above problems, a method for transmitting uplink control information of a terminal in a wireless communication system using carrier aggregation of the present invention includes an uplink control channel transmitted from a first cell and an uplink data channel transmitted from a second cell. Determining whether the transmission is in the same arbitrary subframe, when the uplink control channel and the uplink data channel are transmitted in the arbitrary same subframe, inserting first uplink control information into the uplink data channel And a transmission step of transmitting the first cell and the second cell, wherein the first cell and the second cell are the same or different cells.

In addition, in a wireless communication system using carrier aggregation, the method for receiving uplink control information of a base station is to determine whether an uplink control channel received from a first cell and an uplink control channel received from a second cell are received in any of the same subframe. A determining step of determining, including the step of extracting first uplink control information from the uplink data channel when the uplink control channel and the uplink data channel are received in the same subframe, and the first cell And the second cell are the same or different cells.

In addition, a terminal transmitting uplink control information in a wireless communication system using a carrier aggregation system includes a transmission/reception unit for transmitting and receiving signals with a base station, and an uplink control channel transmitted from the first cell and an uplink control channel transmitted from the second cell. It is determined whether a data channel is transmitted in the same subframe, and when the uplink control channel and the uplink data channel are transmitted in the same subframe, first uplink control information is transmitted to the uplink data channel. And a control unit, wherein the first cell and the second cell are the same or different cells.

In addition, a base station receiving uplink control information in a wireless communication system using a carrier aggregation system includes a transceiver for transmitting and receiving a signal with a terminal, and an uplink control channel received from the first cell and an uplink control channel received from the second cell. It is determined whether a data channel is received in any of the same subframe, and when the uplink control channel and the uplink data channel are received in the same subframe, first uplink control information is transmitted in the uplink data channel. And a control unit characterized in that the first cell and the second cell are the same or different cells.

According to an embodiment of the present invention, a terminal and a base station may transmit and receive a control channel required for data scheduling.

In addition, according to an embodiment of the present invention, when transmission of an uplink control channel and an uplink data channel overlap when transmission of an uplink control channel is supported by a plurality of uplink carriers, uplink control information is inserted into the uplink data channel and transmitted. By doing so, it is possible to transmit uplink control information even with low terminal transmission power, and the base station can increase the probability of receiving the uplink control information without error.

1A and 1B illustrate a communication system to which some embodiments of the present invention are applied.
2A shows an embodiment of cells mapped to one conventional uplink control channel.
2B shows a first embodiment of cells mapped to a plurality of uplink control channels proposed in the present invention.
2C shows a second embodiment of cells mapped to a plurality of uplink control channels proposed in the present invention.
2D shows a third embodiment of cells mapped to a plurality of uplink control channels proposed in the present invention.
3 is an uplink data channel when simultaneous transmission of an uplink control channel and an uplink data channel is not set to a terminal in a cell in which an uplink control channel proposed in the present invention is transmitted, and an uplink control channel overlaps an uplink data channel It is a flow chart of the base station and the terminal for the insertion of control information into.
4 is a case in which simultaneous transmission of an uplink control channel and an uplink data channel is set to a terminal in a cell in which an uplink control channel proposed in the present invention is transmitted, and the uplink control channel overlaps the uplink data channel. It is a flow chart of a base station and a terminal for insertion of control information.
5 is a case in which simultaneous transmission of an uplink control channel and an uplink data channel in a cell in which an uplink control channel proposed in the present invention is transmitted is set to a terminal only in a P cell, and the uplink control channel overlaps the uplink data channel, the cell It is a flow chart of a base station and a terminal for insertion of control information into an uplink data channel in group 1.
6 is a cell group when simultaneous transmission of an uplink control channel and an uplink data channel is set only in a P cell to a terminal in a cell in which an uplink control channel proposed in the present invention is transmitted, and the uplink control channel overlaps the uplink data channel. It is a flow chart of a base station and a terminal for inserting control information into an uplink data channel transmitted irrespective of.
7 is a block diagram of a base station according to embodiments of the present invention.
8 is a block diagram of a terminal according to embodiments 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, embodiments of the present invention will be described using an LTE system and an LTE-A system as an example, but the present invention can be applied to other communication systems to which base station scheduling is applied without any addition or subtraction.

OFDM (Orthogonal Frequency Division Multiplexing) 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: Resource Element, hereinafter referred to as RE). Different REs have characteristics that are orthogonal to each other even through a frequency selective channel, so signals transmitted through different REs can be received to a receiving side without causing mutual interference.

A physical channel is a channel of a physical layer that transmits modulation symbols obtained by modulating one or more encoded bit streams. In an Orthogonal Frequency Division Multiple Access (OFDMA, hereinafter referred to as 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 (RB: Resource Block, hereinafter referred to as RB), and each physical resource block (PRB: Physical Resource Block, hereinafter referred to as PRB) refers to a frequency axis. It may consist of 12 subcarriers arranged along the line and 14 or 12 OFDM symbols arranged along the time axis. Here, the PRB becomes a basic unit of resource allocation.

The reference signal (RS: Reference Signal, hereinafter referred to as RS) is a signal transmitted from a base station. The terminal estimates the channel using the RS. The LTE communication system includes a common reference signal (CRS: Common Reference Signal, hereinafter referred to as CRS) and a demodulation reference signal (DMRS: DeModulation Reference Signal, hereinafter referred to as DMRS). DMRS is a kind of dedicated reference signal.

CRS is a reference signal transmitted over the entire downlink band. All terminals can receive the CRS. The CRS is used for channel estimation, configuration of feedback information of a terminal, or demodulation of a control channel and a data channel. DMRS is also a reference signal transmitted over the entire downlink band. The DMRS is used for demodulation of a data channel and channel estimation of a specific terminal, and 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 downlink 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 a physical uplink control channel (PUCCH) and a data channel (PUSCH). When the uplink data channel is not scheduled, other feedback information such as a response (HARQ-ACK feedback) and channel information for the downlink data channel is transmitted through the control channel. When the uplink data channel is scheduled, other feedback information such as a response to the downlink data channel (HARQ-ACK feedback) and channel information is transmitted through the data channel.

1A and 1B illustrate a communication system to which some embodiments of the present invention are applied. Referring to FIG. 1A, cell 1 102 and cell 2 103 coexist in one base station 101 in a network. Cell 1 may be a TDD cell or an FDD cell. In addition, cell 2 may be a TDD cell or an FDD cell. The terminal 104 transmits data to the base station through the cell 1 102 and the cell 2 103 and receives data from the base station. The terminal 104 may transmit an uplink control channel through a plurality of uplink carriers or may transmit an uplink control channel through one uplink carrier according to the capabilities of the corresponding terminal. When the terminal 104 has the ability to transmit an uplink control channel through a plurality of uplink carriers, the terminal performs uplink transmission through cell 1 (102) and cell 2 (103). When the terminal 104 has the ability to transmit an uplink control channel through one uplink carrier, the terminal 104 performs uplink transmission only through the Pcell. When cell 1 (102) is a P cell, terminal 104 performs uplink transmission only through cell 1 (102). In addition, when the cell 2 103 is a P cell, the terminal 104 performs uplink transmission only through the cell 2 103.

Referring to FIG. 1B, a macro base station 111 for wide coverage and a pico base station 112 for increasing data transmission amount coexist in a network. In the case of FIG. 1B, the macro base station 111 can perform communication with the terminal 114 using the FDD scheme in cell 2 116, and the pico base station 112 using the TDD scheme in cell 1 115. . Alternatively, the macro base station 111 may perform communication with the terminal 114 in cell 2 116 using the TDD scheme, and the pico base station 112 in cell 1 115 using the FDD scheme. A terminal 114 capable of transmitting an uplink control channel through a plurality of uplink carriers may transmit an uplink control channel through a plurality of uplink carriers, and may transmit an uplink control channel through one uplink carrier. have. When the terminal 114 transmits an uplink control channel through a plurality of uplink carriers, the terminal performs uplink transmission through the pico base station 112 of the TDD scheme and the macro base station 111 of the FDD scheme. When the terminal 114 transmits an uplink control channel through one uplink carrier, when the macro base station is a P cell, the terminal performs uplink transmission only through the macro base station 111. In addition, when the pico base station is a P cell, the terminal performs uplink transmission only through the pico base station 112. In this case, it is assumed that the macro base station 111 and the pico base station 112 have an ideal backhaul network. Therefore, X2 communication 113 between base stations at a high speed is possible, so that even if the uplink signal of the terminal 114 is transmitted only to the macro base station 111 or the pico base station 112, the terminal 114 through the X2 communication 113 It is possible to receive the control information related to the P cell from the base station in real time.

Although the scheme proposed in some embodiments of the present invention can be applied to both the system of FIG. 1A and the system of FIG. 1B, the present invention mainly assumes the system of FIG. 1A to be described.

Next, embodiments proposed in the present invention for cells capable of performing HARQ-ACK feedback and channel information reporting in an uplink control channel will be described with reference to FIG. 2.

2A shows an embodiment of cells mapped to one conventional uplink control channel. In the conventional LTE-A, carrier aggregation is possible up to five cells, and one cell capable of transmitting uplink control information is referred to as a P cell, and the remaining cells are referred to as secondary cells (Secondary cell or Scell, hereinafter S cell). The S cell has an S cell index (SCellIndex). HARQ-ACK feedback and channel information for each of the five cells are always transmitted only through the PUCCH in the P cell. A cell (P cell) indicated by a hatched in FIG. 2A refers to a cell that transmits PUCCH. For example, HARQ-ACK feedback for downlink data transmitted from Scell1 is transmitted through the PUCCH of the Pcell, and channel information measured in Scell1 is transmitted through the PUCCH of the Pcell according to the reporting period set in Scell1. Is transmitted. Therefore, the mapped cell to perform HARQ-ACK feedback and channel information reporting through the PUCCH in the P cell includes 5 cells (P cell, S cell 1, S cell 2, S cell 3, S cell) 4, it can be seen that it is S cell 5).

2B shows a first embodiment of cells mapped to a plurality of uplink control channels proposed in the present invention. In the first embodiment of FIG. 2B, carrier aggregation is possible up to five cells as in the carrier aggregation in the conventional LTE-A, but a cell group capable of transmitting HARQ-ACK feedback and channel information through PUCCH is a separate group. Divide by Cells (P cells, S cells 1) indicated by hatching in FIG. 2B refer to cells that transmit PUCCH. Cell group 1 201 is a set of cells to be mapped to perform HARQ-ACK feedback and channel information reporting through PUCCH in a P cell. In the first embodiment of FIG. 2B, cell group 1 201 includes a total of three cells: P cells, S cells 2, and S cells 3. Cell group 2 202 is a set of cells to be mapped to perform HARQ-ACK feedback and channel information reporting through PUCCH in Scell 1. In the first embodiment of FIG. 2B, cell group 2 202 includes a total of two cells, Scell 1 and Scell 4. Accordingly, it can be seen that the cells mapped to perform HARQ-ACK feedback and channel information reporting through the PUCCH in the P cell are Pcell, Scell2, and Scell3 included in cell group 1 201, and S It can be seen that the cells mapped to perform HARQ-ACK feedback and channel information reporting through the PUCCH in cell 1 are Scells 1 and 4 included in cell group 2 202.

2C shows a second embodiment of cells mapped to a plurality of uplink control channels proposed in the present invention. In the second embodiment of FIG. 2C, carrier aggregation is possible up to five cells as in the conventional LTE-A carrier aggregation, but a cell group capable of transmitting HARQ-ACK feedback and channel information through PUCCH is a separate group. Divide by Cells (P cells, S cells 4) indicated by hatching in FIG. 2C refer to cells that transmit PUCCH. Cell group 1 211 is a set of cells to be mapped to perform HARQ-ACK feedback and channel information reporting through PUCCH in a P cell. In the second embodiment of FIG. 2C, cell group 1 211 includes a total of four cells: Pcell, Scell1, Scell2, and Scell3. Cell group 2 212 is a set of cells to be mapped to perform HARQ-ACK feedback and channel information reporting through PUCCH in Scell 4. In the second embodiment of FIG. 2C, only S cell 4 is included in cell group 2 212. Therefore, it can be seen that the mapped cells to perform HARQ-ACK feedback and channel information reporting through the PUCCH in the Pcell are Pcell, Scell1, Scell2, and Scell3 included in cell group 1211. In addition, it can be seen that only Scell 4 included in the cell group 2 212 is mapped so as to perform HARQ-ACK feedback and channel information reporting through the PUCCH in Scell4.

2D shows a third embodiment of cells mapped to a plurality of uplink control channels proposed in the present invention. In the third embodiment in FIG. 2D, carrier aggregation is possible up to 5 cells as in the carrier aggregation in the conventional LTE-A, but a cell group capable of transmitting HARQ-ACK feedback and channel information through PUCCH is a separate group. Divide by Cells (P cells, S cells 2) indicated by hatching in FIG. 2D refer to cells that transmit PUCCH. Cell group 1 221 is a set of cells to be mapped to perform HARQ-ACK feedback and channel information reporting through PUCCH in a P cell. In the third embodiment of FIG. 2D, only P cells are included in cell group 1 221. Cell group 2 222 is a set of cells to be mapped to perform HARQ-ACK feedback and channel information reporting through PUCCH in Scell 2. In the third embodiment of FIG. 2D, cell group 2 222 includes a total of four cells, Scell 1, Scell 2, Scell 3, and Scell 4. Therefore, it can be seen that only the cells included in the cell group 1 (221) are mapped to allow HARQ-ACK feedback and channel information reporting through the PUCCH in the P cell, and HARQ through the PUCCH in Scell 2 It can be seen that the cells mapped to perform -ACK feedback and channel information reporting are Scell1, Scell2, Scell3, and Scell4 included in cell group 2 (222).

For convenience, when describing the following embodiments, a P cell through which PUCCH is transmitted in cell group 1 and a cell through which PUCCH is transmitted in cell group 2 are referred to as pS cells.

Next, when PUCCH transmission and PUSCH transmission based on a cell group mapped to a plurality of PUCCHs in FIGS. 2b, 2c, and 2d occur in the same subframe, the uplink control information of the PUCCH is transmitted to the PUSCH of the cell in the cell group. We will propose a method of inserting into and transmitting. 3, 4, and 5, a method of independently inserting and transmitting uplink control information into a PUSCH for each cell group is proposed. That is, when a plurality of cell groups are set to the UE for carrier aggregation, even if a PUSCH is transmitted in cells of cell group 1, a PUSCH is not transmitted in cells of cell group 2, and only PUCCH is transmitted in the pS cell, the cell group The control information of the PUCCH of the pS cell of 2 is inserted into the PUSCH transmitted from the cells of the cell group 1 and is not transmitted.

Since PUCCH transmission and PUSCH transmission may be performed for each cell group, when UE uplink power control is performed, a power scaling order may be linked with a PUCCH transmission and an uplink control information type of PUSCH transmission. As an example, when HARQ-ACK feedback is inserted into the PUSCH of cell group 1 and channel information is transmitted to the PUCCH of cell group 2, when the power of the terminal is limited, the PUCCH transmission power of cell group 2 may be first scaled. have. As another example, when channel information is inserted into the PUSCH of cell group 1 and HARQ-ACK feedback is transmitted to the PUCCH of cell group 2, when the power of the terminal is limited, the transmission power of the PUSCH of the cell group 1 is first scaled. Can be.

The method proposed by the present invention will be described in detail by dividing it as follows.

When simultaneous PUCCH and PUSCH transmission in a cell in which PUCCH is transmitted is not set to the terminal, and when simultaneous transmission of PUCCH and PUSCH in a cell in which PUCCH is transmitted next is set to the terminal, the PUCCH and the PUCCH and the PUCCH only in the P cell in which the PUCCH is transmitted next are It will be described by dividing the case where simultaneous PUSCH transmission is set to the terminal. Hereinafter, simultaneous transmission of PUCCH and PUSCH means a case where PUCCH and PUSCH are transmitted using the same cell in the same subframe, and the case where PUCCH and PUSCH overlap means that PUCCH and PUSCH are transmitted using the same or different cells within the same subframe. It means the case of becoming.

Whether the UE supports the cell group operation is determined by the UE capability to perform the PUCCH transmission operation in multiple cells, and the network reports its UE capability to the network when the UE connects to the network. do. The cell group operation refers to an operation in which a plurality of cell groups and cells included in the cell group are set in the carrier aggregation system, and uplink control information of the PUCCH is inserted into the PUSCH according to the cell group and transmitted. When the UE capability supports cell group operation, the network may inform the UE of cell group configuration information such as the number of cell groups and which cells belong to the cell group through higher layer signaling.

In addition, a UE capable of simultaneous transmission of PUCCH and PUSCH may or may not be configured to enable simultaneous transmission through higher layer signaling.

First, when simultaneous transmission of PUCCH and PUSCH in a cell in which PUCCH is transmitted is not configured for a terminal, an operation of inserting and transmitting uplink control information will be described. That is, when simultaneous PUCCH and PUSCH transmission is not configured in the P cell or pS cell, when PUCCH transmission and PUSCH transmission occur in the same subframe, a method of inserting and transmitting the uplink control information of the PUCCH into the PUSCH will be described. In the case where simultaneous PUCCH and PUSCH transmission is not set to the terminal, it is also applicable to a terminal in which simultaneous PUCCH and PUSCH transmission is not possible, and simultaneous transmission of PUCCH and PUSCH is possible, but also to a terminal in which simultaneous transmission of PUCCH and PUSCH is not set as a higher signal. Corresponds.

First, when cell group 1 includes more than one cell, if a Pcell transmits a PUCCH, uplink control information insertion is determined based on a situation in which PUSCH transmission occurs in cell group 1 and the type of uplink control information. As an example, when PUSCH transmission occurs in the cell due to a request to transmit aperiodic channel information to a cell belonging to cell group 1, uplink control information of the PUCCH transmitted from the Pcell is aperiodic channel information or HARQ-ACK feedback. In the case of, the uplink control information is transmitted after being inserted into the PUSCH due to the aperiodic channel information request of the cell. As another example, when PUSCH transmission occurs in a Pcell, when uplink control information of a PUCCH transmitted from the Pcell is periodic channel information or HARQ-ACK feedback, the uplink control information is inserted into the PUSCH of the Pcell. And transmitted. As another example, when PUSCH transmission occurs in the S cell of cell group 1 other than the P cell, the uplink control information when the uplink control information of the PUCCH transmitted from the P cell is periodic channel information or HARQ-ACK feedback. Is inserted into the PUSCH of the S cell having the smallest S cell index among the S cells of cell group 1 transmitting the PUSCH and is transmitted. The above insertion and transmission operations are applied in the same manner even when cell group 2 contains more than one cell, and when pS cell transmits PUCCH, uplink control information insertion is determined based on PUSCH transmission in cell group 2 do.

Next, when cell group 1 includes only one cell (ie, P cell), if the P cell transmits PUCCH, when PUSCH transmission in cell group 1 occurs, uplink control information insertion is unconditionally determined. As an example, when PUSCH transmission occurs in the same subframe in a cell belonging to cell group 1, uplink control information of the PUCCH transmitted from the Pcell is inserted into the PUSCH and transmitted. The above insertion and transmission operations are applied in the same manner even when cell group 2 contains only one cell (ie, pS cell), and if pS cell transmits PUCCH, uplink control based on PUSCH transmission in cell group 2 Decide to insert information.

Control information on the uplink data channel when simultaneous transmission of the uplink control channel and the uplink data channel is not set to the terminal in the cell through which the uplink control channel is transmitted using FIG. 3 and the uplink control channel overlaps the uplink data channel The operation of the base station and the terminal for insertion will be described.

3A is a flow chart showing the operation of the base station. First, in step 301, the base station does not configure simultaneous PUCCH and PUSCH transmission in the PUCCH transmission cell of the cell group (P cell in case of cell group 1, pS cell in case of cell group 2) to the UE. If the simultaneous PUCCH and PUSCH transmission is not set to the terminal, it is also applicable to a terminal that is not capable of simultaneous PUCCH and PUSCH transmission, and simultaneous transmission of PUCCH and PUSCH is possible, but also to a terminal whose simultaneous transmission of PUCCH and PUSCH is not set as a higher signal. Corresponds. In step 302, when PUCCH reception and PUSCH reception collide in subframe n, that is, if the subframe to receive the PUCCH from the terminal and the subframe to receive the PUSCH from the terminal coincide, in step 303, the base station transmits the PUCCH to the cell group. (That is, if the PUCCH transmission cell is a P cell, cell group 1, and if the PUCCH transmission cell is a pS cell, cell group 2) it is determined whether it includes one or more cells or only one cell. In step 303, if the cell group transmitting the PUCCH includes one or more cells, the uplink control information is PUSCH based on the situation in which PUSCH transmission occurs in the cell group proposed in the present invention and the type of uplink control information in step 304. Uplink control information is extracted from the received PUSCH by inserting into the device. In step 303, if the cell group transmitting the PUCCH includes only one cell, if the PUSCH transmission in the cell group proposed in the present invention occurs in step 305, uplink control information is unconditionally inserted into the PUSCH. It is extracted from the received PUSCH.

3B is a flow chart showing the operation of the terminal. First, in step 311, the UE does not configure simultaneous PUCCH and PUSCH transmission in the PUCCH transmission cell of the cell group (P cell for cell group 1, pS cell for cell group 2). If the simultaneous PUCCH and PUSCH transmission is not set to the terminal, it is also applicable to a terminal that is not capable of simultaneous PUCCH and PUSCH transmission, and simultaneous transmission of PUCCH and PUSCH is possible, but also to a terminal whose simultaneous transmission of PUCCH and PUSCH is not set as a higher signal. Corresponds. In step 312, when the PUCCH transmission and the PUSCH transmission collide in subframe n, that is, if the subframe in which the UE should transmit the PUCCH and the subframe in which the UE transmits the PUSCH coincide, in step 313, the UE transmits the PUCCH in a cell group (i.e. If the PUCCH transmission cell is a P cell, it is determined whether cell group 1, if the PUCCH transmission cell is a pS cell, cell group 2) includes one or more cells or only one cell. In step 313, if the cell group transmitting the PUCCH includes one or more cells, in step 314, the uplink control information is PUSCH based on the situation in which PUSCH transmission occurs in the cell group proposed by the present invention and the type of uplink control information. The uplink control information is inserted into the PUSCH and transmitted by the method of inserting into. If the cell group transmitting the PUCCH includes only one cell in step 313, if the PUSCH transmission in the cell group proposed in the present invention occurs in step 315, uplink control information is unconditionally inserted into the PUSCH. It is inserted into the PUSCH and transmitted.

Second, when simultaneous transmission of PUCCH and PUSCH in a cell in which PUCCH is transmitted is set to a terminal, an operation of inserting and transmitting uplink control information will be described. That is, when simultaneous PUCCH and PUSCH transmission is configured in a P cell or a pS cell, when PUCCH transmission and PUSCH transmission occur in the same subframe, a method of inserting and transmitting the uplink control information of the PUCCH into the PUSCH will be described. In the above case, when simultaneous PUCCH and PUSCH transmission is configured for a terminal, simultaneous transmission of PUCCH and PUSCH is possible, and simultaneous transmission of PUCCH and PUSCH corresponds to a terminal configured as an upper signal.

First, when cell group 1 includes more than one cell, if a Pcell transmits a PUCCH, uplink control information insertion is determined based on a situation in which PUSCH transmission occurs in cell group 1 and the type of uplink control information. As an example, when PUSCH transmission occurs in the Pcell, when the uplink control information of the uplink control channel transmitted from the Pcell is periodic channel information and HARQ-ACK feedback, the HARQ-ACK feedback among the uplink control information is It is transmitted on the PUCCH of the Pcell, and periodic channel information is transmitted after being inserted into the PUSCH of the Pcell. As another example, when PUSCH transmission occurs in the S cell of cell group 1 other than the P cell, when the uplink control information of the PUCCH transmitted from the P cell is periodic channel information and HARQ-ACK feedback, the uplink control Among the information, HARQ-ACK feedback is transmitted on the PUCCH of the Pcell, and periodic channel information is inserted into the PUSCH of the Scell having the smallest Scell index among the Scells of cell group 1 transmitting the PUSCH and transmitted. As another example, when PUSCH transmission occurs in the cell due to a request to transmit aperiodic channel information to a cell belonging to cell group 1, the uplink control information of the PUCCH transmitted from the Pcell includes aperiodic channel information and HARQ. -In the case of ACK feedback/scheduling request (SR) information, HARQ-ACK feedback/scheduling request information among the uplink control information is transmitted on the PUCCH of the Pcell, and aperiodic channel information is an aperiodic channel of the cell. It is inserted and transmitted in the PUSCH due to the information request. In general, since the power of the PUCCH is higher than that of the PUSCH, the feedback of the HARQ-ACK that directly affects the throughput of the terminal is reliably transmitted using the PUCCH, and the case of channel information that does not significantly affect the throughput of the terminal is limited. In order to save resources of the existing PUCCH, it is inserted into the PUSCH and transmitted. The above insertion and transmission operations are applied in the same manner even when cell group 2 contains more than one cell, and when pS cell transmits PUCCH, uplink control information insertion is determined based on PUSCH transmission in cell group 2 do.

Next, when cell group 1 contains only one cell (ie, P cell), when the P cell transmits PUCCH and PUSCH transmission occurs in cell group 1, uplink control information is inserted according to the type of uplink control information. To decide. As an example, when PUSCH transmission occurs in the same subframe in a cell belonging to cell group 1, HARQ-ACK feedback/scheduling request information among the uplink control information of the PUCCH transmitted from the Pcell is transmitted on the PUCCH, and the periodic channel /Aperiodic channel information is transmitted after being inserted into the PUSCH. The above insertion and transmission operations are applied in the same manner even when cell group 2 contains only one cell (ie, pS cell), and if pS cell transmits PUCCH, uplink control based on PUSCH transmission in cell group 2 Decide to insert information.

Insertion of control information into an uplink data channel when simultaneous transmission of an uplink control channel and an uplink data channel is set to a terminal in a cell through which an uplink control channel is transmitted using FIG. 4 and the uplink control channel overlaps the uplink data channel The operation of the base station and the terminal will be described.

4A is a flow chart showing the operation of the base station. First, in step 401, the base station configures simultaneous PUCCH and PUSCH transmission as higher signals in the PUCCH transmission cell of the cell group (P cell in case of cell group 1, pS cell in case of cell group 2). The simultaneous transmission of PUCCH and PUSCH corresponds to a terminal in which simultaneous transmission of PUCCH and PUSCH is possible and simultaneous transmission of PUCCH and PUSCH is set as an upper signal. In step 402, when PUCCH reception and PUSCH reception collide in subframe n, that is, if the subframe to receive the PUCCH from the terminal and the subframe to receive the PUSCH from the terminal coincide, in step 403, the base station transmits the PUCCH to the cell group. (That is, if the PUCCH transmission cell is a P cell, cell group 1, and if the PUCCH transmission cell is a pS cell, cell group 2) it is determined whether it includes one or more cells or only one cell. In step 403, if the cell group transmitting the PUCCH includes one or more cells, in step 404, the uplink control information is PUSCH based on the situation in which the PUSCH transmission occurs in the cell group proposed by the present invention and the type of uplink control information. Uplink control information is extracted from the received PUSCH by inserting into the device. In step 403, if the cell group transmitting the PUCCH includes only one cell, in step 405, when PUSCH transmission in the cell group proposed by the present invention occurs, uplink control information is inserted into the PUSCH according to the type of uplink control information. In this way, uplink control information is extracted from the received PUSCH.

4B is a flow chart showing the operation of the terminal. First, in step 411, the UE is configured to simultaneously transmit PUCCH and PUSCH as higher signals in the PUCCH transmission cell of the cell group (P cell in case of cell group 1, pS cell in case of cell group 2). When simultaneous PUCCH and PUSCH transmission is set to a terminal, simultaneous transmission of PUCCH and PUSCH is possible, and simultaneous transmission of PUCCH and PUSCH corresponds to a terminal configured as an upper signal. In step 412, when the PUCCH transmission and the PUSCH transmission collide in subframe n, that is, if the subframe in which the UE should transmit the PUCCH and the subframe in which the UE transmits the PUSCH match, in step 413, the UE transmits the PUCCH in a cell group (i.e. If the PUCCH transmission cell is a P cell, it is determined whether cell group 1, if the PUCCH transmission cell is a pS cell, cell group 2) includes one or more cells or only one cell. In step 413, if the cell group transmitting the PUCCH includes one or more cells, in step 414, uplink control information is provided based on the situation in which PUSCH transmission occurs in the cell group proposed by the present invention and the type of uplink control information. By inserting into the PUSCH, uplink control information is inserted into the PUSCH and transmitted. If the cell group transmitting the PUCCH includes only one cell in step 413, if PUSCH transmission in the cell group proposed in the present invention occurs in step 415, uplink control information is unconditionally transmitted to the PUSCH according to the type of uplink control information. As an insertion method, uplink control information is inserted into the PUSCH and transmitted.

Third, the insertion and transmission operation in cell group 1 when simultaneous PUCCH and PUSCH transmission is configured for the terminal only in the P cell will be described. That is, when simultaneous PUCCH and PUSCH transmission is set only in the P cell, a method of inserting and transmitting uplink control information of the PUCCH into the PUSCH when PUCCH transmission and PUSCH transmission occur in the same subframe will be described. In the above, when simultaneous PUCCH and PUSCH transmission is set to the terminal only in the P cell, it is defined in the standard so that simultaneous transmission of PUCCH and PUSCH is possible only in the P cell, and simultaneous transmission of PUCCH and PUSCH of the terminal is possible, and simultaneous transmission of PUCCH and PUSCH is P This corresponds to a terminal set as a higher level signal only in the cell.

First, when cell group 1 includes more than one cell, if a Pcell transmits a PUCCH, uplink control information insertion is determined based on a situation in which PUSCH transmission occurs in cell group 1 and the type of uplink control information. As an example, when PUSCH transmission occurs in a Pcell, when uplink control information of an uplink control channel transmitted from the Pcell is periodic channel information and HARQ-ACK feedback, HARQ-ACK feedback among the uplink control information Is transmitted on the PUCCH of the Pcell, and periodic channel information is transmitted after being inserted into the PUSCH of the Pcell. As another example, when PUSCH transmission occurs in the S cell of cell group 1 other than the P cell, when the uplink control information of the PUCCH transmitted from the P cell is periodic channel information and HARQ-ACK feedback, the uplink Among the control information, HARQ-ACK feedback is transmitted on the PUCCH of the P cell, and periodic channel information is inserted into the PUSCH of the S cell having the smallest S cell index among the S cells of cell group 1 transmitting the PUSCH and transmitted. As another example, when PUSCH transmission occurs in the cell due to a request to transmit aperiodic channel information to a cell belonging to cell group 1, the uplink control information of the PUCCH transmitted from the Pcell is aperiodic channel information and HARQ. -In the case of ACK feedback/scheduling request information, among the uplink control information, HARQ-ACK feedback/scheduling request information is transmitted on the PUCCH of the Pcell, and aperiodic channel information is inserted into the PUSCH due to the aperiodic channel information request of the cell. And transmitted.

Next, if cell group 1 includes only one cell (ie, P cell), if the P cell transmits PUCCH, when PUSCH transmission in cell group 1 occurs, uplink control information is inserted according to the type of uplink control information. Decide. As an example, when PUSCH transmission occurs in the same subframe in a cell belonging to cell group 1, HARQ-ACK feedback/scheduling request information among the uplink control information of the PUCCH transmitted from the Pcell is transmitted on the PUCCH, and the periodic channel/ratio Periodic channel information is transmitted after being inserted into the PUSCH.

5, when simultaneous transmission of an uplink control channel and an uplink data channel can be set to the terminal only in the P cell, and the configuration is indicated as an upper signal and the uplink control channel overlaps the uplink data channel in cell group 1 , Operation of a base station and a terminal for insertion of control information into an uplink data channel in cell group 1 will be described.

5A is a flow chart showing the operation of the base station. First, in step 501, the base station configures simultaneous PUCCH and PUSCH transmission as higher signals for the Pcell, which is a PUCCH transmission cell of cell group 1, to the UE. The simultaneous transmission of PUCCH and PUSCH corresponds to a terminal in which simultaneous transmission of PUCCH and PUSCH is possible and simultaneous transmission of PUCCH and PUSCH is set as an upper signal. In step 502, when PUCCH reception and PUSCH reception collide in subframe n, that is, if the subframe to receive the PUCCH from the terminal and the subframe to receive the PUSCH from the terminal coincide, the base station has one cell group 1 in step 503. It is determined whether it includes more than one cell or only one cell. In step 503, if cell group 1 includes one or more cells, in step 504, uplink control information is transmitted to the PUSCH based on the situation in which PUSCH transmission occurs in cell group 1 proposed by the present invention and the type of uplink control information. In an insertion method, uplink control information is extracted from the received PUSCH. In step 503, if cell group 1 includes only one cell, when PUSCH transmission in cell group 1 proposed by the present invention occurs in step 505, a method of inserting uplink control information into a PUSCH according to a type of uplink control information Uplink control information is extracted from the received PUSCH.

Next, Figure 5b is a flow chart showing the operation of the terminal. First, in step 511, the UE is configured to simultaneously transmit PUCCH and PUSCH as a higher signal in the Pcell, which is a PUCCH transmission cell of cell group 1. When simultaneous PUCCH and PUSCH transmission is set to a terminal, simultaneous transmission of PUCCH and PUSCH is possible, and simultaneous transmission of PUCCH and PUSCH corresponds to a terminal configured as an upper signal. In step 512, when PUCCH transmission and PUSCH transmission collide in subframe n, that is, when the subframe in which the UE transmits PUCCH and the subframe in which the UE transmits PUSCH are identical, in step 513, the UE has at least one cell group 1 It is determined whether to include or to include only one cell. In step 513, if cell group 1 includes one or more cells, in step 514, uplink control information is transmitted to the PUSCH based on the situation in which PUSCH transmission occurs in cell group 1 proposed by the present invention and the type of uplink control information. As an insertion method, uplink control information is inserted into the PUSCH and transmitted. In step 513, if cell group 1 includes only one cell, when PUSCH transmission in cell group 1 proposed by the present invention occurs in step 515, a method of inserting uplink control information into a PUSCH according to a type of uplink control information Uplink control information is inserted into the PUSCH and transmitted.

Next, using FIG. 6, when PUCCH transmission and PUSCH transmission based on the multiple cell groups of FIGS. 2b, 2c, and 2d occur in the same subframe, the uplink control information of the PUCCH is inserted into the PUSCH regardless of the cell group. We propose a method of transmission. That is, when a plurality of cell groups are configured in the UE for carrier aggregation, even if PUSCH is transmitted in cells of cell group 1 and PUSCH is not transmitted in cells of cell group 2 and only PUCCH is transmitted in pS cell, cell group 2 The control information of the PUCCH of the pS cell may be transmitted by inserting it into the PUSCH transmitted from cells of the cell group 1. Even in this case, since PUCCH transmission and PUSCH transmission can be performed for each cell group, when performing terminal uplink power control, the power scaling order can be linked with the PUCCH transmission and the uplink control information type of the PUSCH transmission. have. As an example, when HARQ-ACK feedback is inserted into the PUSCH of cell group 1 and channel information is transmitted to the PUCCH of cell group 2, when the power of the terminal is limited, the PUCCH transmission power of cell group 2 is first scaled. Can be. As another example, when channel information is inserted into the PUSCH of cell group 1 and HARQ-ACK feedback is transmitted to the PUCCH of cell group 2, when the power of the terminal is limited, the transmission power of the PUSCH of cell group 1 is first scaled. Can be.

In the case where simultaneous PUCCH and PUSCH transmission is set for a terminal only in a P cell, an operation of inserting and transmitting uplink control information in cell group 2 will be described. That is, when simultaneous PUCCH and PUSCH transmission is set only in the P cell, when PUCCH transmission in the pS cell and PUSCH transmission occur in the same subframe regardless of the cell group, uplink control information of the PUCCH is inserted into the PUSCH and transmitted. Explain how. In the above, when simultaneous PUCCH and PUSCH transmission is set to the terminal only in the P cell, it is defined in the standard so that simultaneous transmission of PUCCH and PUSCH is possible only in the P cell, and simultaneous transmission of PUCCH and PUSCH of the terminal is possible, and simultaneous transmission of PUCCH and PUSCH is performed in the PC It corresponds to the terminal set as the upper level signal only in.

When the pS cell transmits PUCCH in cell group 2, the pS cell cannot inherently perform PUSCH transmission, so the uplink control based on the situation in which PUSCH transmission occurs in all cells regardless of the cell group and the type of uplink control information Decide to insert information. Therefore, in this case, cell group 2 is not classified according to whether it contains more than one cell or only one cell. As an example, when PUSCH transmission occurs in the P cell of cell group 1, when the uplink control information of the uplink control channel transmitted from the pS cell is periodic channel information and HARQ-ACK feedback, among the uplink control information, HARQ- ACK feedback is transmitted on the PUCCH of the pS cell, and periodic channel information is transmitted after being inserted into the PUSCH of the P cell of the cell group 1. As another example, when PUSCH transmission occurs in an S cell of cell group 1 and cell group 2 other than the P cell, the uplink control information of the PUCCH transmitted from the pS cell is periodic channel information and HARQ-ACK feedback. , Among the uplink control information, HARQ-ACK feedback is transmitted on the PUCCH of the pS cell, and periodic channel information is the S cell having the smallest S cell index among the S cells of cell group 1 and cell group 2 transmitting the PUSCH. It is inserted into the PUSCH of and transmitted. As another example, when PUSCH transmission occurs in the cell due to a request to transmit aperiodic channel information for cells belonging to cell group 1 and cell group 2, uplink control information of PUCCH transmitted from the pS cell is aperiodic. In the case of channel information and HARQ-ACK feedback/scheduling request information, HARQ-ACK feedback/scheduling request information among the uplink control information is transmitted on the PUCCH of the pS cell, and aperiodic channel information is aperiodic channel information of the cell. It is inserted and transmitted in the PUSCH due to the request.

In the above embodiment, from the viewpoint of transmitting uplink control information through one PUSCH irrespective of a cell group, simultaneous PUCCH and PUSCH transmission can be applied regardless of whether or not simultaneous transmission of PUCCH and PUSCH is configured in the Pcell and pScell. . If simultaneous transmission of PUCCH and PUSCH is configured in the Pcell and pScell, and PUCCH including HARQ-ACK feedback is transmitted respectively in the Pcell and pScell, and periodic or aperiodic channel information is transmitted through the PUSCH, two PUCCHs And one PUSCH may be transmitted at the same time. Therefore, in this case, when performing the terminal uplink power control, power scaling may be performed as follows. PUSCH transmission power is first scaled, and a PUCCH with a small number of currently actually transmitted HARQ-ACK feedbacks during transmission of two PUCCHs may be first scaled. For example, if the HARQ-ACK feedback transmitted from the P cell for actual data transmission is 6 bits and the HARQ-ACK feedback transmitted from the pS cell for actual data transmission is 4 bits, the PUCCH transmitted from the pS cell is first scaled. As another example, a PUCCH with a small number of cells included in the cell group may be first scaled. For example, when the number of cells included in cell group 1 is 2 including the P cell, and the number of cells included in cell group 2 is 3 including the pS cell, the PUCCH transmitted from the P cell is first scaled. As another example, a PUCCH with a small number of HARQ-ACK feedbacks in consideration of the number of cells included in the cell group and the transmission mode may be first scaled. For example, in each transmission mode of Pcell and Scell 1 included in cell group 1, the transmission mode of the Pcell is a transmission mode in which two codewords are transmitted, and the transmission mode of Scell 1 is two codewords. A total of 4 HARQ-ACK feedbacks are expected as a transmission mode for transmitting the pS cell, and in each transmission mode of the pS cell, S cell 3, and S cell 4 included in cell group 2, the transmission mode of the pS cell is one codeword. When the transmission mode is the transmission mode, the transmission mode of Scell 3 is the transmission mode that transmits one codeword, and the transmission mode of the Scell 4 is the transmission mode that transmits one codeword, the total number of HARQ-ACK feedbacks is 3 It is expected. Therefore, in this case, the PUCCH of the pS cell may be first scaled. As another example, control information from a higher level may be transmitted in the Pcell, and when considering that it is important for system operation that HARQ-ACK feedback for the control information is transmitted in a timely manner, the PUCCH of the pScell is always scanned first. Carling may be considered.

Using FIG. 6, simultaneous transmission of an uplink control channel and an uplink data channel can be set to the terminal only in the P cell, and the configuration is indicated as an upper signal, and the uplink control channel overlaps the uplink data channel regardless of the cell group. In this case, the operation of the base station and the terminal for inserting control information into an uplink data channel will be described.

6A is a flow chart showing the operation of the base station. First, in step 601, the base station configures simultaneous PUCCH and PUSCH transmission as higher signals for the Pcell, which is a PUCCH transmission cell of cell group 1, to the UE. The simultaneous transmission of PUCCH and PUSCH corresponds to a terminal in which simultaneous transmission of PUCCH and PUSCH is possible and simultaneous transmission of PUCCH and PUSCH is set as an upper signal. In step 602, the PUCCH reception of the pS cell and the PUSCH reception in any cell regardless of the cell group collide in subframe n, that is, the subframe to receive the PUCCH from the terminal and the subframe to receive the PUSCH from the terminal coincide. In step 603, uplink control by inserting uplink control information in the PUCCH of the pS cell into the PUSCH based on the situation in which PUSCH transmission occurs regardless of the cell group proposed by the present invention and the type of uplink control information. Information is extracted from the received PUSCH.

6B is a flow chart showing the operation of the terminal. First, in step 611, the UE is configured to simultaneously transmit PUCCH and PUSCH as a higher signal in the Pcell, which is a PUCCH transmission cell of cell group 1. When simultaneous PUCCH and PUSCH transmission is set to a terminal, simultaneous transmission of PUCCH and PUSCH is possible, and simultaneous transmission of PUCCH and PUSCH corresponds to a terminal configured as an upper signal. In step 612, when the PUCCH transmission of the pS cell and the PUSCH transmission in a cell regardless of the cell group collide in subframe n, that is, the subframe in which the UE transmits PUCCH and the subframe in which the UE transmits PUSCH coincide In step 613, uplink control information is inserted into the PUSCH based on the situation in which PUSCH transmission occurs regardless of the cell group proposed in the present invention and the type of uplink control information in the PUCCH of the pS cell. It is inserted into the PUSCH and transmitted.

7 is a diagram illustrating a base station apparatus according to an embodiment of the present invention. Referring to FIG. 7, the base station apparatus includes a transmission unit composed of a PDCCH block 705, a PDSCH block 716, a PHICH block 724, and a multiplexer 715, a PUSCH block 730, a PUCCH block 739, and vice versa. It is composed of a receiving unit composed of a neutralizer 749 and a control unit 701 and a scheduler 703 that control extraction of uplink control information from the received PUSCH when PUCCH and PUSCH reception overlap in the same subframe according to the present invention. . Here, a method of extracting uplink control information from the received PUSCH includes all embodiments of the present invention. For transmission/reception in a plurality of cells, there may be a plurality of transmitters and receivers, but for explanation, it is assumed that there is only one transmitter and one receiver.

When PUCCH and PUSCH reception overlap in the same subframe, the control unit 701 including control of extracting uplink control information from the PUSCH is intended to schedule by referring to the amount of data to be transmitted to the terminal and the amount of resources available in the system. The scheduler 703, PDCCH block 705, PDSCH block 716, PHICH block 724, PUSCH block 730, PUCCH block 739 by adjusting the timing relationship between each physical channel for the UE Informs you. When PUCCH and PUSCH transmissions overlap in the same subframe, the control unit 701 determines whether PUCCH and PUSCH are received in any of the same subframe, and extracts the first uplink control information by inserting the first uplink control information from the PUSCH to which cell of which cell group. Whether to do so is indicated by the PUCCH block 739 and the PUSCH block 730. The first cell and the second cell may be the same or different cells, and the extraction of uplink control information when the PUSCH of the specific cell group is received follows the method described in the specific embodiment of the present invention. The PDCCH block 705 configures control information under the control of the scheduler 703, and the control information is multiplexed with other signals in the multiplexer 715.

The PDSCH block 716 generates data under the control of the scheduler 703, and the data is multiplexed with other signals in the multiplexer 715.

The PHICH block 724 generates HARQ ACK/NACK for the PUSCH received from the terminal under the control of the scheduler 703. The HARQ ACK/NACK is multiplexed with other signals in the multiplexer 715.

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

In the receiver, the PUSCH block 730 acquires PUSCH data for a signal received from the terminal. As described in the specific embodiment of the present invention, when PUCCH and PUSCH reception overlap in the same subframe, first uplink control information is extracted from the PUSCH. The downlink HARQ ACK/NACK generation is notified to the scheduler 703 of the error of the decoding result of the PUSCH data, and the downlink HARQ ACK/NACK is transmitted by applying the error of the decoding result to the control unit 701. Try to adjust the timing.

The PUCCH block 730 acquires uplink ACK/NACK or channel information from a signal received from the terminal. The acquired uplink ACK/NACK or channel information is applied to the scheduler 703 and used to determine whether or not to retransmit the PDSCH and to determine the modulation and coding scheme (MCS). In addition, the acquired uplink ACK/NACK is applied to the control unit 701 to adjust the transmission timing of the PDSCH.

8 is a diagram illustrating a terminal device according to an embodiment of the present invention.

Referring to FIG. 8, the UE comprises a transmission unit composed of a PUCCH block 805, a PUSCH block 816, and a multiplexer 815, a PHICH block 824, a PDSCH block 830, a PDCCH block 839, and a demultiplexer. It is composed of a receiving unit consisting of (849) and a control unit 801 that controls insertion of uplink control information into the PUSCH when PUCCH and PUSCH transmissions overlap in the same subframe according to the present invention. For transmission/reception in both base stations and transmission/reception in multiple cells, there may be a plurality of transmitters and receivers, but for explanation, it is assumed that there is only one transmitter and one receiver each.

According to the present invention, when PUCCH transmitted from the first cell and PUSCH transmitted from the second cell overlap in the same subframe, the controller 801 determines whether the PUCCH and the PUSCH are transmitted in any of the same subframe, and which cell The PUCCH block 805 and the PUSCH block 816 indicate to which cell of the group the first uplink control information is inserted and transmitted in the PUSCH. The first cell and the second cell may be the same or different cells, and the insertion of uplink control information when transmitting the PUSCH of the specific cell group follows the method described in the specific embodiment of the present invention.

The PUCCH block 805 configures HARQ ACK/NACK or channel information as uplink control information under the control of a controller 801 that controls storage of downlink data in a soft buffer, and the HARQ ACK/NACK or channel information is a multiplexer. At 815, it is multiplexed with other signals.

The PUSCH block 816 extracts data to be transmitted, and the extracted data is multiplexed with other signals in the multiplexer 815. In this case, when PUCCH transmission and PUSCH transmission overlap according to a specific embodiment of the present invention, uplink control information is inserted into the PUSCH.

In addition, the multiplexed signals are generated as a single carrier frequency division multiple access (SC-FDMA) signal and transmitted to the base station in consideration of the DL/UL HARQ-ACK transmission/reception timing.

In the receiver, the PHICH block 824 separates the PHICH signal through the demultiplexer 849 for the signal received from the base station according to the DL/UL HARQ-ACK transmission/reception timing, and then acquires whether or not HARQ ACK/NACK for the PUSCH. .

The PDSCH block 830 separates the PDSCH signal through the demultiplexer 849 with respect to the signal received from the base station, obtains the PDSCH data, and notifies the PUCCH block 805 whether there is an error in the decoding result of the data. Thus, the generation of uplink HARQ ACK/NACK is adjusted, and the control unit 801 whether an error in the decoding result is applied to adjust the timing when transmitting the uplink HARQ ACK/NACK.

The PDCCH block 839 separates the PDCCH signal through the demultiplexer 849 and then performs DCI format decoding to obtain downlink control information from the decoded signal.

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 is limited to the described embodiments and should not be defined, and should be defined by the scope of the claims and equivalents as well as the scope of the claims to be described later.

Claims (20)

In a method for transmitting uplink control information of a terminal in a wireless communication system using carrier aggregation,
Determining whether simultaneous transmission of an uplink control channel and an uplink data channel is configured in the terminal;
Checking the number of cells in the cell group to which the cell transmitting the uplink control channel belongs;
Determining whether the uplink control channel and the uplink data channel transmitted from cells in the cell group should be transmitted in any same subframe; And
When the uplink control channel and the uplink data channel are transmitted in the same subframe, uplink control information is inserted into the uplink data channel based on whether the simultaneous transmission is set and the number of cells in the cell group Including the step of transmitting,
The uplink control information inserted into the uplink data channel is changed based on whether the simultaneous transmission is set and the number of cells in the cell group.

The method of claim 1,
The uplink control channel and the uplink data channel are transmitted in the same subframe, and the UE is not configured to simultaneously transmit the uplink control channel and the uplink data channel, and the number of cells in the cell group When is one, the uplink control information inserted into the uplink data channel includes all of the uplink control information.
The method of claim 1,
The uplink control channel and the uplink data channel are transmitted in the same subframe, and the UE is not configured to simultaneously transmit the uplink control channel and the uplink data channel, and the number of cells in the cell group When is two or more, the uplink control information inserted into the uplink data channel includes at least one of channel information or HARQ-ACK feedback.
The method of claim 1,
When the uplink control channel and the uplink data channel are transmitted in the same arbitrary subframe, and simultaneous transmission of the uplink control channel and the uplink data channel is set to the terminal, insertion into the uplink data channel The uplink control information to be transmitted comprises at least one of periodic channel information and aperiodic channel information. delete In a terminal for transmitting uplink control information in a wireless communication system using a carrier aggregation system,
A transceiver for transmitting and receiving signals to and from the base station; And
It is determined whether simultaneous transmission of an uplink control channel and an uplink data channel is configured in the terminal,
Check the number of cells in the cell group to which the cell transmitting the uplink control channel belongs, and
It is determined whether the uplink control channel and the uplink data channel transmitted from cells in the cell group should be transmitted in any of the same subframe,
When the uplink control channel and the uplink data channel are transmitted in the same subframe, uplink control information is inserted into the uplink data channel based on whether the simultaneous transmission is set and the number of cells in the cell group It includes a control unit that controls to be transmitted and
The uplink control information inserted into the uplink data channel is changed based on whether the simultaneous transmission is set and the number of cells in the cell group. The method of claim 6, wherein the control unit,
The uplink control channel and the uplink data channel are transmitted in the same subframe, and the UE is not configured to simultaneously transmit the uplink control channel and the uplink data channel, and the number of cells in the cell group When is one, the uplink control information inserted into the uplink data channel is controlled to include all of the uplink control information.
The method of claim 6, wherein the control unit,
The uplink control channel and the uplink data channel are transmitted in the same subframe, and the UE is not configured to simultaneously transmit the uplink control channel and the uplink data channel, and the number of cells in the cell group When is more than one, the uplink control information inserted into the uplink data channel is controlled to include at least one of channel information or HARQ-ACK feedback.
The method of claim 6, wherein the control unit,
When the uplink control channel and the uplink data channel are transmitted in the same arbitrary subframe, and simultaneous transmission of the uplink control channel and the uplink data channel is set to the terminal, insertion into the uplink data channel The terminal, characterized in that the uplink control information is controlled to include at least one of periodic channel information and aperiodic channel information.
delete In a method for receiving uplink control information of a base station in a wireless communication system using carrier aggregation,
Determining whether simultaneous transmission of an uplink control channel and an uplink data channel is configured in the terminal;
Checking the number of cells in the cell group to which the cell receiving the uplink control channel belongs;
Determining whether the uplink control channel and the uplink data channel received by cells in the cell group should be received in any same subframe; And
When the uplink control channel and the uplink data channel are received in the same subframe, uplink control information is extracted from the uplink data channel based on whether the simultaneous transmission is set and the number of cells in the cell group Including the step of,
The uplink control information extracted from the uplink data channel is changed based on whether the simultaneous transmission is set and the number of cells in the cell group.
The method of claim 11,
The uplink control channel and the uplink data channel are received in the same arbitrary subframe, and simultaneous transmission of the uplink control channel and the uplink data channel is not set to the terminal, and the number of cells in the cell group is one In the case of, the uplink control information extracted from the uplink data channel includes all of the uplink control information.
The method of claim 11,
The uplink control channel and the uplink data channel are received in the same arbitrary subframe, and simultaneous transmission of the uplink control channel and the uplink data channel is not set to the terminal, and the number of cells in the cell group is two. In the above case, the uplink control information extracted from the uplink data channel includes at least one of channel information or HARQ-ACK feedback.
The method of claim 11,
When the uplink control channel and the uplink data channel are received in the same subframe, and simultaneous transmission of an uplink control channel and an uplink data channel is set to the terminal, the uplink extracted from the uplink data channel The link control information comprises at least one of periodic channel information and aperiodic channel information.
delete In a base station for receiving uplink control information in a wireless communication system using a carrier aggregation system,
Transmitting and receiving unit for transmitting and receiving a signal to and from the terminal; And
It is determined whether simultaneous transmission of an uplink control channel and an uplink data channel is configured in the terminal,
Check the number of cells in the cell group to which the cell receiving the uplink control channel belongs,
Determine whether the uplink control channel and the uplink data channel received by cells in the cell group should be received in any same subframe,
When the uplink control channel and the uplink data channel are received in the same subframe, uplink control information is extracted from the uplink data channel based on whether the simultaneous transmission is set and the number of cells in the cell group It includes a control unit that controls to be
The base station, wherein the uplink control information extracted from the uplink data channel is changed based on whether the simultaneous transmission is set and the number of cells in the cell group.
The method of claim 16, wherein the control unit,
The uplink control channel and the uplink data channel are received in the same arbitrary subframe, and simultaneous transmission of the uplink control channel and the uplink data channel is not set to the terminal, and the number of cells in the cell group is one In the case of, the uplink control information extracted from the uplink data channel is controlled to include all of the uplink control information.
The method of claim 16, wherein the control unit,
The uplink control channel and the uplink data channel are received in the same arbitrary subframe, and simultaneous transmission of the uplink control channel and the uplink data channel is not set to the terminal, and the number of cells in the cell group is two. In the above case, the uplink control information extracted from the uplink data channel is controlled to include at least one of channel information or HARQ-ACK feedback.
The method of claim 16, wherein the control unit,
When the uplink control channel and the uplink data channel are received in the same subframe, and simultaneous transmission of an uplink control channel and an uplink data channel is set to the terminal, the uplink extracted from the uplink data channel The base station, characterized in that the link control information is controlled to include at least one of periodic channel information and aperiodic channel information.
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