KR20140126230A - Methods for transmitting and receiving control information in uplink and the apparatuses thereof - Google Patents

Abstract

The present invention relates to a method and apparatus for transmitting / receiving control information in an uplink, and a method for transmitting control information in an uplink of a terminal belonging to a first base station and a second base station, according to an embodiment of the present invention, Mapping the control information HARQ-ACK, RI, CQI, and PMI to the PUSCH to be transmitted to the base station or the second base station, and transmitting the PUSCH mapped with the control information as an uplink signal, One reference signal per subframe, or the PUSCH uses multiple subframes or multiple TTI structures.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for transmitting control information in uplink,

The present invention relates to a method and apparatus for transmitting / receiving control information in an uplink, and more particularly, to a method and apparatus for transmitting / receiving control information in an uplink data transmission channel of a small cell and an arbitrary cell / base station / RRH / antenna / To a method and apparatus for mapping and transmitting uplink control information and receiving the control information.

As communications systems evolved, consumers, such as businesses and individuals, used a wide variety of wireless terminals. The current mobile communication system such as LTE (Long Term Evolution) and LTE-Advanced of the 3GPP series is a high-speed and large-capacity communication system capable of transmitting and receiving various data such as video and wireless data beyond voice- It is required to develop a technique capable of transmitting large-capacity data in accordance with the above-described method. On the other hand, since the conventional single cell method can not be applied in transmitting uplink and reference signals in a plurality of cells or a small cell, a new technique and a method are needed.

The present invention can transmit / receive the control information between the UE and the BS by mapping the UL control information on the uplink data transmission channel of the small cell and the UE belonging to any cell / base station / RRH / antenna / RU under the multi- .

According to an aspect of the present invention, there is provided a method for transmitting control information in an uplink in a first BS and a second BS in a BS according to an embodiment of the present invention includes transmitting control information to a PUSCH to be transmitted to the first BS or a second BS, Mapping HARQ-ACK, RI, CQI, and PMI, and transmitting the PUSCH to which the control information is mapped, as an uplink signal, wherein the PUSCH has one reference signal per subframe Or the PUSCH uses multiple subframes or multiple TTI structures.

A method for receiving control information in an uplink from a terminal belonging to a first base station and a second base station according to another embodiment of the present invention includes receiving a PUSCH transmitted by the terminal, Decoding the HARQ-ACK, RI, CQI, and PMI, wherein the PUSCH has one reference signal per subframe, or the PUSCH uses multiple subframes or multiple TTI structures .

A UE transmitting control information in an uplink belonging to multiple cells according to another embodiment of the present invention maps control information HARQ-ACK, RI, CQI, and PMI to a PUSCH to be transmitted to a first base station or a second base station And a transmitter for transmitting the PUSCH mapped with the control information as an uplink signal, wherein the PUSCH has one reference signal per subframe, or the PUSCH has multiple subframes or multiple TTI structures Is used.

A base station receiving control information in the uplink from a terminal belonging to multiple cells according to another embodiment of the present invention is a base station receiving control information in the uplink from a terminal belonging to a first base station and a second base station, And a control unit for decoding HARQ-ACK, RI, CQI, and PMI, which are control information mapped to the received PUSCH, wherein the PUSCH is allocated to one subframe Or a PUSCH uses multiple subframes or multiple TTI structures.

In the case of applying the present invention, a small cell and a UE belonging to any cell / base station / RRH / antenna / RU under the multi-layer cell structure can transmit control information to the base station by mapping control information to an uplink PUSCH.

1 is a view showing a small cell development according to an embodiment.
2 is a diagram showing a small cell deployment scenario.
3 to 6 are diagrams showing detailed scenarios in the small cell deployment.
7 is a diagram showing a structure of a subframe in the PUSCH transmission to which the present invention is applied.
FIG. 8 is a diagram showing an example of a PUSCH subframe structure according to multiple TTI (or subframe) scheduling in a normal CP according to an embodiment of the present invention.
9 is a diagram illustrating an example of a PUSCH subframe structure according to multiple TTI (or subframe) scheduling in an extended CP according to an embodiment of the present invention.
10 and 11 are diagrams schematically illustrating a UCI transmission method transmitted on a PUSCH.
12 is a diagram illustrating a process performed by a terminal according to the first embodiment of the present invention.
13 is a diagram illustrating a process performed by a UE according to the second embodiment of the present invention.
14 is a diagram illustrating a process performed by a UE according to the third embodiment of the present invention.
15 is a diagram illustrating a process performed by a UE according to the fourth embodiment of the present invention.
16 is a flowchart illustrating a process performed by a UE according to the fifth embodiment of the present invention.
17 is a diagram illustrating a process performed by a UE according to the sixth embodiment of the present invention.
18 is a diagram illustrating a process performed by a UE according to a seventh embodiment of the present invention.
FIG. 19 is a diagram illustrating a configuration of a user terminal according to another embodiment.
20 is a diagram illustrating a configuration of a base station according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data and the like. A wireless communication system includes a user equipment (UE) and a base station (BS, or eNB). The user terminal in this specification is a comprehensive concept of a terminal in wireless communication. It is a comprehensive concept which means a mobile station (MS), a user terminal (UT), an SS (User Equipment) (Subscriber Station), a wireless device, and the like. Hereinafter, the user terminal may be referred to as a terminal in the present specification. Hereinafter, the user terminal may be referred to as a terminal in the present specification.

A base station or a cell generally refers to a station that communicates with a user terminal and includes a Node-B, an evolved Node-B (eNB), a sector, a Site, a BTS A base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), a transmission point (TP), a reception point It can be called another term.

In this specification, a base station or a cell is interpreted as a comprehensive meaning indicating a part or function covered by BSC (Base Station Controller) in CDMA, Node-B in WCDMA, eNB in LTE or sector (site) And covers various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, and RU communication range.

Since the various cells listed above exist in the base station controlling each cell, the base station can be interpreted into two meanings. i) a device itself providing a megacell, a macrocell, a microcell, a picocell, a femtocell, or a small cell in relation to a wireless region, or ii) the wireless region itself. i indicate to the base station all devices that are controlled by the same entity or that interact to configure the wireless region as a collaboration. An eNB, an RRH, an antenna, an RU, an LPN, a point, a transmission / reception point, a transmission point, a reception point, and the like are embodiments of a base station according to a configuration method of a radio area. ii) may indicate to the base station the wireless region itself that is to receive or transmit signals from the perspective of the user terminal or from a neighboring base station.

Therefore, a base station is collectively referred to as a megacell, a macrocell, a microcell, a picocell, a femtocell, a small cell, an RRH, an antenna, an RU, a low power node (LPN), a point, an eNB, Quot;

Herein, the user terminal and the base station are used in a broad sense as the two transmitting and receiving subjects used to implement the technical or technical idea described in this specification, and are not limited by a specific term or word. The user terminal and the base station are used in a broad sense as two (uplink or downlink) transmitting and receiving subjects used to implement the technology or technical idea described in the present invention, and are not limited by a specific term or word. Here, an uplink (UL, or uplink) means a method of transmitting / receiving data to / from a base station by a user terminal, and a downlink (DL or downlink) .

There are no restrictions on multiple access schemes applied to wireless communication systems. Various multiple access schemes such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, OFDM- Can be used. An embodiment of the present invention can be applied to asynchronous wireless communication that evolves into LTE and LTE-Advanced via GSM, WCDMA, and HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB. The present invention should not be construed as limited to or limited to a specific wireless communication field and should be construed as including all technical fields to which the idea of the present invention can be applied.

A TDD (Time Division Duplex) scheme in which uplink and downlink transmissions are transmitted using different time periods, or an FDD (Frequency Division Duplex) scheme in which they are transmitted using different frequencies can be used.

In systems such as LTE and LTE-Advanced, the uplink and downlink are configured on the basis of one carrier or carrier pair to form a standard. The uplink and downlink transmit control information through a control channel such as a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel And a data channel such as a Physical Downlink Shared CHannel (PDSCH), a Physical Uplink Shared CHannel (PUSCH), and the like. On the other hand, control information can also be transmitted using EPDCCH (enhanced PDCCH or extended PDCCH).

In this specification, a cell refers to a component carrier having a coverage of a signal transmitted from a transmission point or a transmission point or transmission / reception point of a signal transmitted from a transmission / reception point, and a transmission / reception point itself .

The wireless communication system to which the embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-point transmission / reception system in which two or more transmission / reception points cooperatively transmit signals. antenna transmission system, or a cooperative multi-cell communication system. A CoMP system may include at least two multipoint transmit and receive points and terminals.

The multi-point transmission / reception point includes a base station or a macro cell (hereinafter referred to as 'eNB'), and at least one mobile station having a high transmission power or a low transmission power in a macro cell area, Lt; / RTI >

Hereinafter, a downlink refers to a communication or communication path from a multiplex transmission / reception point to a terminal, and an uplink refers to a communication or communication path from a terminal to a multiplex transmission / reception point. In the downlink, a transmitter may be a part of a multipoint transmission / reception point, and a receiver may be a part of a terminal. In the uplink, the transmitter may be a part of the terminal, and the receiver may be a part of multiple transmission / reception points.

Hereinafter, a situation in which a signal is transmitted / received through a channel such as PUCCH, PUSCH, PDCCH, and PDSCH is expressed as 'PUCCH, PUSCH, PDCCH and PDSCH are transmitted and received'.

In the following description, the description that the PDCCH is transmitted or received or the signal is transmitted or received through the PDCCH may be used to mean transmitting or receiving the EPDCCH or transmitting or receiving the signal through the EPDCCH.

The physical downlink control channel described below may mean a PDCCH, an EPDCCH, or a PDCCH and an EPDCCH. For convenience of description, the PDCCH, which is an embodiment of the present invention, may be applied to the PDCCH.

In addition, the High Layer Signaling described herein includes RRC signaling for transmitting RRC information including RRC parameters.

An eNB, which is an embodiment of a base station, performs downlink transmission to terminals. The eNB includes a physical downlink shared channel (PDSCH) as a main physical channel for unicast transmission, downlink control information such as scheduling required for reception of PDSCH, and uplink data channel A physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission in a Physical Uplink Shared Channel (PUSCH). Hereinafter, the transmission / reception of a signal through each channel will be described in a form in which the corresponding channel is transmitted / received.

At this time, as described below with reference to the drawings, the first UE1 transmits the uplink signal to the eNB and the second UE transmits the uplink signal to the RRH.

The following describes a small cell deployment scenario to which the proposals described in the present invention can be applied.

1 is a view showing a small cell development according to an embodiment.

FIG. 1 shows a configuration in which a small cell and a macro cell coexist. In FIGS. 2 to 3, the presence or absence of macro coverage, whether the small cell is for outdoor use or indoor use, , Whether the development of the small cell is sparse or dense, or whether the same frequency spectrum as the macro is used in terms of spectrum or not.

2 is a diagram showing a small cell deployment scenario. Figure 2 shows a typical representative configuration for the scenario of Figure 3; Fig. 2 shows a small cell deployment scenario and includes scenarios # 1, # 2a, # 2b, and # 3. 200 represents a macro cell, and 210 and 220 represent a small cell. The overlapping macrocells in FIG. 2 may or may not exist. Coordination can be performed between the macro cell 200 and the small cells 210 and 220 and adjustment can also be performed between the small cells 210 and 220. And the overlapping regions of 200, 210, and 220 can be clustered.

3 to 6 are diagrams showing detailed scenarios in the small cell deployment.

Fig. 3 shows scenario # 1 in the small cell expansion. Scenario 1 is a co-channel deployment scenario for small cells and macro cells in the presence of overhead macros and is an outdoor small cell scenario. Reference numeral 310 denotes a case where both the macro cell 311 and the small cell are outdoors, and 312 denotes a small cell cluster. Users are distributed both indoors / outdoors.

The solid lines connecting the small cells in the small cell 312 mean a backhaul link within a cluster. The dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between small cells and macro cells.

Fig. 4 shows the small cell deployment scenario # 2a. Scenario 2a is a deployment scenario in which small cells and macros use different frequency spectra in the presence of an overlaid macro, and is an outdoor small cell scenario. Both the macro cell 411 and the small cells are outdoors and 412 indicates a small cell cluster. Users are distributed both indoors / outdoors.

The solid lines connecting the small cells in the small cell 412 indicate a backhaul link within the cluster. The dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between small cells and macro cells.

5 shows the small cell deployment scenario # 2b. Scenario 2b is a deployment scenario in which the small cell and the macro use different frequency spectrum in the presence of the overlay macro and is an indoor small cell scenario. The macro cell 511 is outdoors, the small cells are all indoors, and 512 is a small cell cluster. Users are distributed both indoors / outdoors.

The solid lines connecting the small cells in the small cell 512 indicate a backhaul link within the cluster. The dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between small cells and macro cells.

6 shows the small cell deployment scenario # 3. Scenario 3 is an indoor small cell scenario with no coverage of macros. 612 indicates a small cell cluster. In addition, the small cells are all indoor and users are dispersed both indoors and outdoors.

The solid lines connecting the small cells in the small cell 612 mean a backhaul link within the cluster. The dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between small cells and macro cells.

The following shows a frame structure for uplink data transmission and reference signal (RS) transmission in LTE and LTE-Advanced.

7 is a diagram showing a structure of a subframe in the PUSCH transmission to which the present invention is applied. Reference numeral 710 denotes a subframe structure in the case of PUSCH transmission and a case of a normal CP (normal CP). 711 is a first slot (1 ^st slot), 712 is a second slot (2 ^nd slot). Reference numeral 720 denotes a subframe structure in the case of PUSCH transmission and shows an extended CP case. 721 is the first slot, and 722 is the second slot.

710 and 720 show the structure of a subframe for the case of PUSCH transmission. Here, the first slot and the second slot may be allocated to different frequency regions according to frequency hopping.

Hereinafter, reference signals for PUSCH data demodulation are described. In the case of a reference signal for PUSCH data demodulation, in a conventional system, a parameter for generating a reference signal transmitted from an arbitrary base station or an arbitrary cell to a terminal, that is, a sequence group index, a sequence index a terminal receives a sequence index, a cyclic shift index, and orthogonal cover code (OCC) index information from a base station to which the corresponding terminal belongs. The UE can perform the following operations: i) setting a sequence group hopping and a sequence hopping, which are set in a cell ID and an RRC configured to perform the division of the corresponding base station, according to the configuration of the sequence group hopping and the sequence hopping, And notifies the terminal of the index. Ii) a cyclic shift index (PDCCH) for generating a reference signal to be transmitted by the UE through the downlink control information (DCI) format 0 and the DCI format 4 for the uplink transmitted through the downlink, , And the OCC index. Through the procedures of i) and ii), the UE generates a reference signal for data demodulation and transmits the reference signal and the uplink PUSCH to an arbitrary base station.

In the prior art, when uplink data transmitted from a cell / base station / RRH / antenna / RU or a terminal belonging to a small cell is transmitted, a reference signal is transmitted for demodulation of a data channel, One symbol per slot is used for the uplink reference signal in the frequency domain to which the data channel is assigned or in the same frequency domain as the RBs. This is because the data rate for uplink transmission in the UE is fixedly reduced by 1/7 (14.3%) per subframe in the case of the normal CP, 1/6 (16.7%) in the case of the extended CP, ). However, in the case where the small cell environment and any cell / base station / RRH / antenna / RU can limit UE mobility to low speed, a method capable of reducing such RS overhead can be considered .

Also, in the case of using a structure for reducing the RS overhead, it may be difficult to secure the reliability of transmission and reception of the control channel through different understanding of the uplink channel PUSCH between the UE and the BS. Therefore, it may be necessary to newly define a rule for UCI transmission on the uplink PUSCH.

The present invention can reduce the overhead of a reference signal in a case where a small cell environment and any cell / base station / RRH / antenna / RU can limit UE mobility to low speed, Channel and reference signal transmission method. In addition, in the development of a small cell and an arbitrary cell / base station / RRH / antenna / RU that can be independently deployed and a macrocell / base station / RRH / antenna / The present invention relates to a method for transmitting an uplink data channel and a reference signal so as to support backward compatibility, and a method for transmitting an uplink PUSCH transmission between a terminal and a base station A mapping method for UCI transmission on the uplink PUSCH and a related method of transmitting the UCI on the uplink PUSCH are proposed in order to solve the ambiguity due to the PUSCH transmission and reception between the terminal and the base station, .

In case of applying multiple TTI (Multiple Transmission Time Interval) and multiple sub-frame scheduling to a small cell environment and any cell / base station / RRH / antenna / RU, multiple antennas ) Is used to transmit an uplink PUSCH using multiple layers, an OCC having a length of 2 (length-2) can be applied to maintain the orthogonality of an uplink reference signal between antennas / layers . That is, the number of SC-FDMA or DFT-spread OFDM symbols to which the UL reference signal is allocated should be designed to be a multiple of two.

Based on this, it is possible to transmit PUSCH on multiple layers as various embodiments, and it is possible to reduce an overhead of an uplink reference signal, thereby improving uplink data throughput, We will look at the structure for.

In this manner, even when existing terminals having backward compatibility exist, a new terminal, that is, a terminal performing multi-TTI (or sub-frame) scheduling and a legacy terminal performing a single sub-frame scheduling allocate resources on the same frequency resource A new terminal and a legacy terminal are multiplexed so that orthogonality of an uplink reference signal can be maintained. That is, as in the case of the legacy scheme, different terminals configure the uplink SDMA or MU-MIMO by the scheduling of the base station to allocate frequency resources of the same PUSCH, but improve the data throughput by maintaining the orthogonality of the uplink reference signal The transmission structure for the uplink reference signal and the PUSCH is modified as follows, and the overhead of the reference signal is reduced to increase the data throughput.

FIG. 8 is a diagram showing an example of a PUSCH subframe structure according to multiple TTI (or subframe) scheduling in a normal CP according to an embodiment of the present invention.

810, 820, 830, and 840, data symbols and RS symbols are configured according to respective TTI or sub-frame scheduling.

9 is a diagram illustrating an example of a PUSCH subframe structure according to multiple TTI (or subframe) scheduling in an extended CP according to an embodiment of the present invention.

910, 920, 930, and 940, data symbols and RS symbols are configured according to respective TTI or sub-frame scheduling.

For single layer transmission, intra and inter-subframe frequency hopping between slots is applied depending on whether frequency hopping that can be instructed by UL DCI is set in the structures of FIGS. 8 and 9 It is possible to assign the first slot and the second slot of each subframe to different frequency regions, and since resource allocation of the PUSCH is performed through one scheduling grant, the first subframe and the second subframe The frequency hopping pattern of the PUSCH of the frame is set to be the same. In this case, demodulation is performed based on the reference signal in the slot in which the demodulation reference signal exists in the same frequency region during the PUSCH demodulation for the transmission of the uplink PUSCH. 810 of FIG. 8, for example, since the resource allocation areas in the frequency domain for the PUSCH in slot 0 and slot 2 are the same, demodulation is performed based on the demodulation reference signal in slot 0, and in slot 1 and slot 3 So that demodulation is performed on the basis of the demodulation reference signal in slot 3, since the resource allocation area in the frequency domain with respect to the PUSCH of slot 3 is the same. 810 of FIG. 8 has been described by way of example, it is also possible to demodulate the PUSCH of the same resource allocation area based on the slot having the demodulation reference signal in 820, 830 and 840 of FIG. 8 in a similar manner. 9, 920, 930, and 940 of FIG. 9, the demodulation of the PUSCH of the same resource allocation area is performed based on the slot having the demodulation reference signal, similarly to the above description for the extended CP as in the case of the normal CP . So that demodulation for PUSCH transmission is performed based on a demodulation reference signal existing in one subframe even in case of inter-frame frequency hopping.

In addition, the following features can be obtained with respect to the structures of FIGS. 8 and 9. 8 and 9 illustrate that the channel is not changed significantly in the low mobility state, and after performing accurate channel estimation at the position of the reference signal, interpolation (or interpolation) is performed for channel estimation in the data symbol having no reference signal. In this case, since the channel estimation value of the data channel is interpolated based on the accurate channel estimation at the position of the reference signal due to the channel having a small variation in the case, Reliability can be secured.

8 and 9, since the channels of the reference signals to which the OCC is allocated are most similar when estimating the OCC-allocated reference signals used for transmission of multiple layers, Since the accuracy of the channel estimation can be increased, an error of the channel estimation value of the reference signal, for example, a mean square error value between the reference signal and the actual channel at the position can be measured to be low. Therefore, since the interpolation method and the extrapolation method (extrapolation method) for the data channel are performed with the corresponding channel estimation value, the reliability of the channel estimation for the data channel can be secured.

8 and 9, 830, 840, 930, and 940 have the advantage that the patterns of the reference signals can be taken in the same manner for each subframe when one subframe is taken as a reference. There is an advantage that a physical channel can be mapped based on one subframe that is not two subframe-based mappings to which a physical channel is mapped.

As a further suggestion to the present invention, it may be considered to set UE-specific so as to have different patterns so that different reference signal symbols between UEs can be allocated.

As a method of setting the pattern, there is a method of assigning four or two orthogonal patterns to each of the terminals. Among the four or two patterns, a method of setting a pattern used by the UE may be an explicit signaling method, for example, a method of directly instructing the corresponding pattern on the uplink DCI format, There may be a method of determining a corresponding pattern by using a code-point remaining on the DCI format as an implicit signaling (or implicit, implicit signaling) There may be a method of assigning a reference signal allocation pattern of a terminal to be dependent on a value indicated in a cyclic shift field and also a method of modulo 4 or modulo 4 according to C- or < RTI ID = 0.0 > 2). < / RTI > Alternatively, there may be a method of setting different reference signal symbols between UEs belonging to each cell so as to have different patterns so as to reduce the interference of the reference signal for the uplink for each cell . This will be a way to set different patterns based on the cell ID.

In the method of the present invention, the number of subframes used in the multi-TTI, multiple subframe scheduling is represented by two subframes in the present invention shown in FIGS. 8 and 9, but this can be extended to multiple subframes have. That is, by extending the embodiment of FIGS. 8 and 9, it is possible to transmit a reference signal while ensuring orthogonality among 2N (N is a natural number equal to or greater than 1) subframes.

In this patent, the number of uplink RSs per subframe is applied in the small cell environment as shown in the above figure, uplink control information (UCI) transmitted on the uplink PUSCH, i.e. HARQ-ACK, CSI CQI, PMI, and RI) to a PUSCH and an apparatus using the method. That is, according to an embodiment of the present invention, an uplink PUSCH for mapping and transmitting uplink control information on an uplink data transmission channel of a small cell and a cell / base station / RRH / antenna / To a UCI mapping and transmission method and apparatus therefor.

10 and 11 are diagrams schematically illustrating a UCI transmission method transmitted on a PUSCH.

10, a UL-SCH, a channel quality indicator (CQI), a precoding matrix indicator (PMI), and a random indicator (RI) are multiplexed at 1010 in the scheduled PUSCH transmission resource, and a Hybrid Automatic Retransmission reQuest acknowledgment is punctured by the CQI, the PMI, and the RI to map the multiplexed resource to the uplink data transmission channel PUSCH. This type of mapping is performed in front of the DFT, and a diagram showing a resource completed in the time and frequency resource mapping on the DFT front end is shown in FIG. That is, the UUS on the PUSCH is mapped to the region excluding the symbol through which the RS of the PUSCH is transmitted, and more specifically, in the case of the HARQ-ACK transmission, it is regarded as important information enabling HARQ for downlink transmission Therefore, the HARQ-ACK information is mapped to a region closest to the RS allocated region, so that the best channel estimation is performed when estimating a channel based on a frequency selective channel and a time selective channel characteristic And the HARQ-ACK is set to have reliability in detection of the HARQ-ACK according to the result. As shown in FIG. 10 and FIG. 11, the RI of the CSI information is mapped on the PUSCH in a form similar to the HARQ-ACK. That is, in order to know the CQI or the PMI, the RI requires more reliable detection as information to be correctly known, and therefore, the RI is set to map the RI to the outer symbol of the HARQ-ACK allocated immediately adjacent to the uplink reference signal symbol. Also, for CQI and PMI, time and frequency domain allocation is set to map to PUSCH resource using a mapping method that precedes time domain.

Referring to FIGS. 10 and 11, it can be seen that control information and data are multiplexed on the PUSCH.

Hereinafter, the present invention will be described with reference to the case where the structure of the PUSCH used for the uplink is i) UCI mapping in case of one reference signal per subframe and ii) UCI mapping in the case of multiple-subframe or multiple TTI UCI mapping of the case will be examined.

That is, UCI mapping and transmission process on the uplink PUSCH for transmitting uplink control information on the uplink data transmission channel of the small cell and the cell / base station / RRH / antenna / RU of the UE under the multi-layer cell structure As follows.

The present invention relates to a method and an apparatus for transmitting and receiving control information in an uplink in a first base station and a second base station in a second base station, and a mapping of control information to an uplink will be described in detail.

The PUSCH has one reference signal for one subframe or the PUSCH has multiple subframes or multiple TTI structures. In this case, the first and second base stations transmit control information in the uplink, And the UE maps control information HARQ-ACK, RI, CQI, and PMI to the PUSCH to be transmitted to the first base station or the second base station, and transmits the PUSCH to which the control information is mapped as an uplink signal.

Each embodiment will be described as follows.

In the first embodiment, HARQ-ACKs are mapped using one or two nearby symbols of a symbol in which one reference signal is located in each of the one or more subframes, and symbols excluding both of the two symbols near the symbol are used So that the RI can be mapped.

In the second embodiment, HARQ-ACK is mapped using one symbol in the neighborhood of a symbol in which one reference signal is located in each of the one or more subframes, and the HARQ-ACK is mapped from the next resource of the HARQ- Can be mapped.

In a third embodiment, each of the one or more sub-frames includes two different slots, and when a reference signal is mapped to a first position of a first one of the slots, It is possible to map HARQ-ACK, RI, CQI, PMI, and the like while avoiding the second position of the slot. That is, the subframe is composed of two slots. One of the slots is referred to as a first slot. A reference signal is mapped to a specific position (first position) of the first slot, and a second slot The HARQ, RI, CQI, and PMI can be mapped by avoiding the second position of the second slot corresponding to the first position of the first slot even when the reference signal is not mapped.

In the fourth embodiment, HARQ-ACK or RI can be mapped on the same time axis as the CQI and PMI mapped areas on the PUSCH. Since the channel environment may not have a large time selectivity under the subframe structure, mapping is performed on the time axis, such as mapping on the PUSCH of the CQI and PMI used for HARQ-ACK or RI, .

In the fifth embodiment, HARQ-ACK or RI may be first mapped on a time axis to a slot where one reference signal is located in each of the one or more subframes. This is because HARQ-ACK or RI is first allocated to the slot where one reference signal per subframe is allocated, as in the conventional method in which CQI and PMI are allocated to the PUSCH resource on the time axis as a whole, . This can be mapped to allocate from CQI / PMI mapping resources that are opposite in frequency axis so as not to overlap with CQI / PMI mapping.

In the sixth embodiment, each of the one or more subframes includes two different slots, and when a reference signal is mapped to a first slot of the slot, the HARQ-ACK and the RI in the first slot include a CQI and a PMI And allocates the CQI and the PMI to the frequency axis and the time axis of the time axis among the remaining resources, and allocates the CQI and the PMI on the time axis different from the HARQ-ACK and the RI And allocate and map resources from the resources.

In the seventh embodiment, each of the at least one subframe includes two different slots. When the reference signal is mapped to the first slot of the slots, the HARQ-ACK and the RI are allocated to the first slot, The CQI and the PMI may be mapped to allocate the CQI and the PMI to the remaining slots to which the reference signal is not mapped, on the time axis, and to allocate the CQI and the PMI by expanding to the frequency axis.

In the present invention, when the structure of the PUSCH used for the uplink has one reference signal per subframe, a method of mapping the UCI is proposed through various embodiments.

end. HARQ - ACK of PUSCH On To map  Way

-1) In the first embodiment as described above, it is possible to set HARQ-ACK to be mapped onto the PUSCH using two symbols near both of the SC-FDMA or DFTs OFDM symbol or OFDM symbol in which one reference signal is allocated per subframe . In order to secure the reliability of transmission of the HARQ-ACK rather than the transmission of the PUSCH, the HARQ-ACK is mapped to a symbol whose channel estimation performance is more accurate in order to ensure reliability of transmission of the HARQ-ACK.

-2) In the above-described second embodiment, HARQ-ACK is set to be mapped on the PUSCH resource using SC-FDMA or DFTsOFDM where one reference signal per subframe is located, or one symbol near each OFDM symbol , And when an additional symbol is needed during the accumulation of the HARQ-ACK, the HARQ-ACK mapping can be performed using the next nearby symbol. In order to secure the reliability of transmission of the HARQ-ACK rather than the transmission of the PUSCH, the HARQ-ACK is mapped to a symbol whose channel estimation performance is more accurate in order to ensure reliability of transmission of the HARQ-ACK. In addition, it can be applied as a method for further improving the efficiency of resources.

-3) According to the third embodiment, even if one reference signal per subframe exists only in a specific slot, the position of a symbol used as an RS in a subframe structure based on the existing uplink PUSCH subframe structure is assumed to be To map the HARQ-ACK on the resources of the PUSCH. This makes it possible to set the mapping of the HARQ-ACK onto the PUSCH to be the same as that of the existing methods regardless of the subframe structure of the PUSCH. Even if the uplink subframe structure is changed, The HARQ-ACK transmitted on the PUSCH is detected in the same manner as in the conventional method, thereby maintaining backward compatibility.

-4) In the fourth embodiment, since the channel environment may not have a large time selectivity under one subframe structure in the small cell environment, mapping of the CQI and PMI on the PUSCH used in the HARQ-ACK, Similarly, the HARQ-ACK may be mapped first on the time axis and the mapping of the HARQ-ACK to the PUSCH on the frequency axis may be extended.

-5) The fifth embodiment described above is applied as follows. This allocates HARQ-ACK to the PUCCH resource on the time axis first, to the PUSCH resource on the time axis first, and to the slot on which one reference signal is allocated per subframe, on the time axis, as in the latter scheme. In order to avoid overlapping RE for CQI / PMI mapping in a manner used in the past, it can be mapped to allocate from resources opposite to each other in the frequency axis different from the CQI / PMI mapping.

In the case of having the same symbol distance as one embodiment which can be added to -1) to -5), in a case where a symbol in one direction needs to be selected, in the case of data processing, The symbol having the lowest symbol number in the slot can be mapped to the symbol having the earliest time on the subframe. However, according to the embodiment, when the data processing time is sufficient, the time can be set to be mapped to the latest symbol.

I. RI To PUSCH  On To map  Way

-1) In the first embodiment as described above, SCI-FDMA or DFTsOFDM in which one reference signal per subframe is located, or RI is mapped on the PUSCH using both third symbols except for two nearby symbols of the OFDM symbol Can be set. In order to ensure the reliability of transmission of the RI rather than the transmission of the PUSCH, the RI is mapped to a symbol whose channel estimation performance is more accurate in order to ensure reliability of transmission of the RI.

(2) In the second embodiment, HARQ-ACK is set to be mapped on the PUSCH using SC-FDMA or DFTsOFDM in which one reference signal is located per subframe or one symbol in the vicinity of the OFDM symbol, The HARQ-ACK mapping is performed using the next near symbol in the case where additional symbols are required while the HARQ-ACK is being piled, and the RI performs HARQ-ACK mapping from the next resource to which the HARQ- Can be assigned. In order to ensure the reliability of transmission of the RI rather than the transmission of the PUSCH, the RI is mapped to a symbol whose channel estimation performance is more accurate in order to ensure reliability of transmission of the RI.

-3) According to the third embodiment, even if one reference signal per subframe exists only in a specific slot, the position of a symbol used as an RS in a subframe structure based on the existing uplink PUSCH subframe structure is assumed to be To map the RI onto the resources of the PUSCH. In this case, even if the uplink subframe structure is changed by setting the mapping of the RI onto the PUSCH regardless of the subframe structure of the PUSCH, the existing terminal and the new terminal can not use the PUSCH And the backward compatibility is set so that the RI transmitted on the RI can be detected using the same method as the conventional method.

4) In the fourth embodiment, since the channel environment may not have a large time selectivity under a single subframe structure in the small cell environment, mapping of the CQI and PMI on the PUSCH used in the conventional RI, It is possible to map the RI first on an axis and to extend the mapping of the RI to the PUSCH on the frequency axis.

-5) The fifth embodiment described above is applied as follows. It is possible to allocate RIs first on the time axis to a slot in which one reference signal per subframe is located, such as a scheme in which CQI and PMI are allocated to a PUSCH resource on the time axis as a whole on a subframe and PUSCH resources are allocated on a frequency axis later. In order to avoid overlapping RE for CQI / PMI mapping in a manner used in the past, it can be mapped to allocate from resources opposite to each other in the frequency axis different from the CQI / PMI mapping. This also causes mapping to be performed so as not to overlap resources of the HARQ-ACK.

-1) to -5), in a case where symbols in one direction are to be selected in the case of having the same symbol distance, in the case of the data processing, First, it is possible to set the symbol to be mapped using the symbol having the lowest symbol number in the slot, i.e., the subframe in the slot. If the data processing time is sufficient according to the embodiment, the time can be set to be mapped to the latest symbol.

All. CQI / PMI To PUSCH  On To map  Way

C-1) The sixth embodiment described above is applied as follows. The CQI and the PMI are first allocated to the PUSCH resource on the time axis as the time axis, and the CQI and PMI are allocated on the time axis to the slot where one reference signal is allocated per subframe, The slot is allocated to the frequency axis later, and the next slot is assigned to the next slot in the order of time and frequency. In order to prevent overlapping of the HARQ-ACK and the RI mapping, it is possible to set the HARQ-ACK and the RI to be allocated from the opposite resources in the frequency axis to which the HARQ-ACK and the RI are mapped. It is also set to be mapped so as not to overlap resources of HARQ-ACK.

(2) According to the third embodiment, even if one reference signal per subframe exists only in a specific slot, the position of a symbol used as an RS in a subframe structure based on the existing uplink PUSCH subframe structure is assumed to be To map the CQI / PMI on the resources of the PUSCH. Here, when one reference signal per subframe exists only in a specific slot, when CQI / PMI in a slot to which a reference signal is not allocated is allocated, RE Lt; RTI ID = 0.0 > CQI / PMI. ≪ / RTI > For backward compatibility with existing terminals, mapping of CQIs / PMIs to REs in a location for an existing reference signal in a slot to which a corresponding reference signal is not allocated may be excluded, In another aspect of the present invention, the CQI / PMI mapping can be performed on the RE at the position for the existing reference signal in the slot to which the reference signal is not allocated.

(3) The seventh embodiment as described above is applied as follows. In the seventh embodiment, the slot in the time axis to which the CQI / PMI is allocated may be allocated to the slot in which the reference signal does not exist because the resource in the slot in which the reference signal is located in one subframe may be allotted by HARQ-ACK and RI. . In this case, as a mapping method of time and frequency, CQI and PMI may be allocated to a corresponding slot on a time axis first and then allocated to a corresponding slot later on a frequency axis.

In the following description of the present invention, a method of mapping a corresponding UCI in the case of a PUSCH using multiple subframes or multiple TTI structures is proposed through various embodiments.

la. HARQ - ACK of PUSCH On To map  Way

-1) In the first embodiment as described above, the HARQ-ACK is transmitted to the PUSCH using either SC-FDMA or DFTsOFDM in which one reference signal is located on each subframe per multiple subframe, or one of nearby symbols of the OFDM symbol. As shown in FIG. This is a method of expanding a case where there are two reference signals per one subframe in the PUSCH structure in a case where one reference signal exists on each subframe per multiple subframe. There may be a scheme of accumulating HARQ-ACK on the PUSCH resource at the positions of the symbols shown above. In this case, HARQ-ACK in the first subframe is first mapped and HARQ-ACK in the next subframe in the multiple subframe scheduling is mapped. -ACK can be mapped.

In order to secure the reliability of transmission of the HARQ-ACK rather than the transmission of the PUSCH, the HARQ-ACK is mapped to a symbol whose channel estimation performance is more accurate in order to ensure reliability of transmission of the HARQ-ACK.

2) In the above-described second embodiment, HARQ-ACK is transmitted on the PUSCH phase using SC-FDMA or DFTsOFDM in which one reference signal is located on each subframe per multiple subframe or one symbol near the OFDM symbol. And if HARQ-ACK is being accumulated, additional HARQ-ACK mapping can be performed using the next nearest symbol when additional symbols are needed. There may be a scheme of accumulating HARQ-ACK on the PUSCH resource at the positions of the symbols shown above. In this case, HARQ-ACK in the first subframe is first mapped and HARQ-ACK in the next subframe in the multiple subframe scheduling is mapped. -ACK can be mapped.

In order to secure the reliability of transmission of the HARQ-ACK rather than the transmission of the PUSCH, the HARQ-ACK is mapped to a symbol whose channel estimation performance is more accurate in order to ensure reliability of transmission of the HARQ-ACK. In addition, the efficiency of the resource can be further improved.

In the third embodiment, even when one reference signal is present on each subframe per multiple subframe and one reference signal per subframe exists only in a specific slot, the existing uplink PUSCH It is possible to map the HARQ-ACK on the resource of the PUSCH based on the position of the symbol used as the RS in the subframe structure based on the subframe structure. This makes it possible to set HARQ-ACK on the PUSCH to be the same as that used in the past, so that even if the uplink subframe structure changes, This is a way to maintain backward compatibility that allows you to detect using the same method.

4) Considering scheduling of multiple subframes in a small cell environment, since the channel environment may not have a large time selectivity under the corresponding subframe structure, the PUSCH phase of the CQI and PMI used for the corresponding HARQ- HARQ-ACK in a symbol unit can be mapped on the time axis as a mapping.

When scheduling of multiple subframes is considered in mapping HARQ-ACKs on a symbol-by-symbol basis on the time axis, HARQ-ACKs can be mapped to scheduled subframes on a symbol-by-symbol basis on the time axis. For example, In the case of two subframes, HARQ-ACK mapping is performed on a time axis in two subframes on a symbol-by-symbol basis.

Alternatively, when scheduling of multiple subframes is considered in mapping HARQ-ACKs on a symbol-by-symbol basis on the time axis, if multiple subframes are scheduled based on a scheme used in a single subframe The HARQ-ACK mapping on the time axis in a single subframe can be performed first. In addition, when transmission of HARQ-ACK is required, transmission of the corresponding HARQ-ACK can be extended to the next subframe. In the extension to the next subframe, the same method as that of the previously used single subframe mapping scheme can be used.

(5) The fifth embodiment described above is applied as follows. Considering the scheduling of multiple subframes, if there is one reference signal on each subframe per multiple subframe, CQI and PMI are first allocated to the PUSCH resource on the time axis over the entire subframe, Scheme, a HARQ-ACK can be first allocated on a time axis to a slot in which one reference signal is allocated per subframe. It can be mapped to allocate from the opposite resource in the CQI / PMI mapped frequency axis to avoid overlapping with the CQI / PMI mapping.

In a case where the symbols having the same symbol distance are to be selected in one direction, it is necessary to select a symbol in one direction from the viewpoint of data processing, First, it is possible to set the symbol to be mapped using the symbol having the lowest symbol number in the slot, i.e., the subframe in the slot. If the data processing time is sufficient according to the embodiment, the time can be set to be mapped to the latest symbol.

hemp. RI To PUSCH  On To map  Way

(1) SCI-FDMA or DFTsOFDM in which one reference signal is located on each subframe per multiple subframe, or RI is mapped on the PUSCH using both third symbols except for two symbols near both of the OFDM symbols . RI can be piled up at the positions of the symbols shown above in stacking on the PUSCH resource and the RIs in the first subframe can be mapped first and the RIs in the next subframe in the multiple subframe scheduling can be mapped.

In order to ensure the reliability of transmission of the RI rather than the transmission of the PUSCH, the RI is mapped to a symbol whose channel estimation performance is more accurate in order to ensure reliability of transmission of the RI.

(2) In the second embodiment, HARQ-ACK is transmitted on the PUSCH phase using SC-FDMA or DFTsOFDM in which one reference signal is located on each subframe per multiple subframe or one symbol in the vicinity of the OFDM symbol. And an HARQ-ACK mapping is performed using the next neighbor symbol when additional symbols are needed while the HARQ-ACK is being piled. In addition to the HARQ-ACK mapping, the HARQ-ACK is allocated after HARQ- You can assign RIs from the following resources: There may be a method of stacking the RIs on the PUSCH resource at the positions of the symbols shown above and may map the RIs in the first subframe first and the RIs in the next subframe in the multiple subframe scheduling have.

In order to ensure the reliability of transmission of the RI rather than the transmission of the PUSCH, the RI is mapped to a symbol whose channel estimation performance is more accurate in order to ensure reliability of transmission of the RI.

Even in a case where one reference signal per subframe exists only in a specific slot on each subframe per multiple subframe, the subframe structure based on the existing uplink PUSCH subframe structure, It is possible to map the RI to the resource of the PUSCH on the assumption of the position of the symbol used as the RS. In this case, even if the uplink subframe structure is changed by setting the mapping of the RI onto the PUSCH regardless of the subframe structure of the PUSCH, the existing terminal and the new terminal can not use the PUSCH And the backward compatibility is set so that the RI transmitted on the RI can be detected using the same method as the conventional method.

-4) In the fourth embodiment as described above

In the case of considering scheduling of multiple subframes in a small cell environment, since the channel environment may not have a large time selectivity under the subframe structure, mapping of the CQI and PMI on the PUSCH resource used for the corresponding RI, Lt; RTI ID = 0.0 > RI < / RTI >

When the scheduling of multiple subframes is considered in mapping the RIs on a symbol-by-symbol basis on the time axis, the RI may be mapped to the scheduled subframe in units of symbols on the time axis. For example, It means that RI is mapped on a time axis in two subframes on a symbol-by-symbol basis.

Alternatively, in the case of considering the scheduling of multiple subframes in mapping the RIs on a symbol-by-symbol basis on the time axis, even if multiple subframes are scheduled based on the scheme used in a single subframe, In doing so, the mapping of RIs on the time axis within a single subframe can be performed first. In addition, when transmission of the RI is required, the transmission of the corresponding RI can be extended to the next subframe. In the extension to the next subframe, the same method as that of the single subframe used previously can be used.

(5) The fifth embodiment as described above is applied as follows. Considering the scheduling of multiple subframes, if there is one reference signal on each subframe per multiple subframe, CQI and PMI are first allocated to the PUSCH resource on the time axis over the entire subframe, The RI can be allocated to the slot in which one reference signal is allocated per subframe as a time axis. In order to avoid overlapping RE for CQI / PMI mapping in a manner used in the past, it can be mapped to allocate from resources opposite to each other in the frequency axis different from the CQI / PMI mapping. It is also mapped so as not to overlap resources of the HARQ-ACK.

In one embodiment, which may be added in (1) to (5), when a symbol in one direction needs to be selected in the case of having the same symbol distance, in the case of data processing, First, it is possible to set the symbol to be mapped using the symbol having the lowest symbol number in the slot, i.e., the subframe in the slot. If the data processing time is sufficient according to the embodiment, the time may be set to map to the latest symbol.

bar. CQI / PMI To PUSCH  On To map  Way

Bar -1) The sixth embodiment described above is applied as follows. In the case of considering multiple sub-frame scheduling, unlike the scheme in which CQI and PMI are first allocated to the PUSCH resource on the time axis over the entire subframe and the frequency axis is later allocated to the PUSCH resource, CQI, and PMI, allocates the slot to the corresponding slot later on the frequency axis, and assigns the CQI and the PMI to the slot in which the reference signal of the next subframe exists, in the order of time and frequency. A slot in which the reference signal of the first subframe does not exist, and a slot in which the reference signal of the next subframe does not exist is allocated next. This can be allocated from HARQ-ACK and RI resources that are opposite in the frequency axis in order to avoid overlapping HARQ-ACK and RI mapping. It is also mapped so as not to overlap resources of HARQ-ACK and RI.

In case of considering the multiple sub-frame scheduling according to the third embodiment as described above, even when one reference signal per sub-frame exists only in a specific slot, the sub-frame structure based on the existing uplink PUSCH sub- It is possible to map the CQI / PMI to the PUSCH resource on the assumption of the position of the symbol used as the RS. In the case where one reference signal per subframe exists only in a specific slot, when allocating CQI / PMI in a slot to which a reference signal is not allocated, CQI / PMI is allocated to RE for an existing reference signal of a slot to which the reference signal is not allocated / PMI can be mapped. For backward compatibility with existing terminals, mapping of CQIs / PMIs to REs in a location for an existing reference signal in a slot to which a corresponding reference signal is not allocated may be excluded, In another embodiment, the mapping of the CQI / PMI to the RE at the location for the existing reference signal of the slot to which the reference signal is not allocated can be set in terms of increasing the transmission efficiency.

Bar -3) The following seventh embodiment is applied as follows. In the case of considering multiple sub-frame scheduling, since resources in a slot in which a reference signal is located in one subframe can be allotted by HARQ-ACK and RI, in the seventh embodiment, in the time axis in which CQI / The slot can be set to a slot in which the reference signal does not exist. In this case, as a mapping method of time and frequency, CQI and PMI may be allocated to the corresponding slot on the time axis first, and may be allocated to the corresponding slot later on the frequency axis.

The present invention can improve the data rate of the uplink in the mobile station and improve the data rate in the downlink through accurate transmission and reliable transmission of control information in the uplink.

In an uplink subframe structure applied in a small cell environment, when the uplink UCI is transmitted to the PUSCH, ambiguity regarding transmission / reception between the UE and the base station is solved, so that transmission of UCI information and data in the UE, The reliability of information and data reception can be ensured and the data transmission rate of the uplink and downlink can be improved.

A method of transmitting control information in an uplink in a first base station and a second base station in a second base station, the method comprising the steps of: transmitting HARQ-ACK, RI, and HARQ control information to the PUSCH to be transmitted to the first base station or the second base station, CQI, and PMI, and transmits the PUSCH to which the control information is mapped as an uplink signal. The PUSCH has one reference signal per subframe, or the PUSCH includes multiple subframes or multiple TTI structures Lt; / RTI >

Meanwhile, in a method for receiving control information in an uplink from a terminal belonging to a first base station and a second base station, in operation of a first base station or a second base station, a PUSCH transmitted by the terminal is received, And decoding the HARQ-ACK, RI, CQI, and PMI, which are control information mapped to the PUSCH, wherein the PUSCH has one reference signal per subframe, or the PUSCH includes multiple subframes or multiple TTI structure is used.

The above process is shown in the first to seventh embodiments, which will be described with reference to the terminal.

12 is a diagram illustrating a process performed by a terminal according to the first embodiment of the present invention. In step S1210, the UE maps the HARQ-ACK using one or two neighbor symbols of a symbol in which one reference signal is located in each of at least one subframe of the PUSCH to be transmitted to the first base station or the second base station. Then, the terminal maps the RI to symbols except for two nearby symbols of the symbol (S1220). The CQI and PMI are mapped by applying the above embodiment, and the PUSCH to which the HARQ-ACK, RI, CQI, and PMI are mapped is transmitted as an uplink signal (S1230). The embodiment of FIG. 12 includes the embodiments of -1, -1, -1, and -1.

The base station receives the PUSCH and decodes the HARQ-ACK mapped to one or two neighboring symbols of a symbol in which one reference signal is located in each of the one or more subframes, The mapped RI can be decoded.

13 is a diagram illustrating a process performed by a UE according to the second embodiment of the present invention.

In step S1310, the UE maps HARQ-ACK to one neighbor symbol of a symbol in which one reference signal is located in each of at least one subframe of the PUSCH to be transmitted to the first base station or the second base station. Then, the MS maps the RI from the next resource of the HARQ-ACK-mapped resource (S1320). The CQI and PMI are mapped by applying the above embodiment, and the PUSCH to which the HARQ-ACK, RI, CQI, and PMI are mapped is transmitted as the uplink signal (S1330). The embodiment of FIG. 13 includes the embodiments of -2, -2, -2, and -2.

The base station decodes the HARQ-ACK mapped to one of neighbor symbols of a symbol in which one reference signal is located in each of the one or more subframes, and maps the RI mapped from the next resource of the HARQ- .

14 is a diagram illustrating a process performed by a UE according to the third embodiment of the present invention.

In step S1410, the UE determines a first position of a first slot to which a reference signal is mapped among two slots included in one or more subframes of a PUSCH to be transmitted to the first base station or the second base station. In step S1420, the MS avoids the second position of the second slot corresponding to the first position of the first slot and maps HARQ-ACK, RI, CQI, or PMI. Thereafter, the MS transmits a PUSCH to which HARQ-ACK, RI, CQI, and PMI are mapped, as an uplink signal (S1430). The embodiment of FIG. 14 includes embodiments of -3, -3, -2, -3, -3, and -2.

The base station avoids the second position of the second slot corresponding to the first position of the first slot to which the reference signal is mapped among the two slots included in each of the one or more subframes of the PUSCH and decodes the mapped control information.

15 is a diagram illustrating a process performed by a UE according to the fourth embodiment of the present invention. The UE maps the HARQ-ACK and the RI on the PUSCH to be transmitted to the first base station or the second base station on the time axis (S1510), and maps the CQI / PMI to the remaining resources on the same time axis (S1520). The UE then transmits the PUSCH to which the HARQ-ACK, RI, CQI, and PMI are mapped, as an uplink signal (S1530). The embodiment of FIG. 15 includes the embodiments of -4, -4, -4, and -4 above.

The BS decodes the HARQ-ACK or the RI that has been allocated and mapped on the same time axis as the CQI or the PMI mapping on the PUSCH.

16 is a flowchart illustrating a process performed by a UE according to the fifth embodiment of the present invention. In step S1610, the UE checks the slot in which the reference signal is located among the two slots included in one or more subframes of the PUSCH to be transmitted to the first base station or the second base station, so as not to overlap HARQ-ACK or RI on the time axis (S1620). After the step S1620, that is, after the HARQ-ACK or RI mapping, the CQI and the PMI are mapped (S1630). The PUSCH to which the HARQ-ACK, RI, CQI, and PMI are mapped is transmitted as an uplink signal (S1640). The embodiment of FIG. 16 includes embodiments of -5, -5, -5, and -5.

The base station allocates the HARQ-ACK or RI mapped in the time axis of the slot where one reference signal is located in each of the one or more subframes. And also decodes the CQIs and PMIs mapped in the manner presented in various embodiments.

17 is a diagram illustrating a process performed by a UE according to the sixth embodiment of the present invention. The UE checks a first slot to which a reference signal is mapped among two slots included in each of at least one subframe of a PUSCH to be transmitted to the first base station or the second base station (S1710). The HARQ-ACK and the RI The CQI and the PMI are first allocated on the time axis and then mapped (S1720). In step S1730, the MS allocates and maps CQI and PMI from resources opposite to the frequency axis in step S1730, and transmits the PUSCH in which HARQ-ACK, RI, CQI, and PMI are mapped on the uplink signal in step S1740. The embodiment of Fig. 17 includes the embodiments of da-1 and bar-1 in advance.

The base station decodes the HARQ-ACK and the RI that are mapped and allocated on the time axis of the first slot to which the reference signal is mapped among the two slots included in each of the one or more subframes, And decodes the mapped CQI and the PMI.

18 is a diagram illustrating a process performed by a UE according to a seventh embodiment of the present invention. In step S1810, the UE checks the CQI and the PMI in the first slot for a time slot in which the reference signal is not mapped among the two slots included in one or more subframes of the PUSCH to be transmitted to the first base station or the second base station, Axis, and maps them in step S1820. The UE then maps the HARQ-ACK and the RI in step S1830, and transmits the PUSCH to which the HARQ-ACK, RI, CQI, and PMI are mapped on the uplink signal in step S1840. The embodiment of FIG. 17 includes the embodiments of the above-mentioned-2 and the bar-2.

The BS decodes the CQI and the PMI mapped to the time axis of the slot to which the reference signal is not mapped, out of the two slots included in each of the one or more subframes.

In FIGs. 12 to 18, the symbol to which the control information is to be allocated may be preferentially allocated to the symbol having the lowest symbol number.

FIG. 19 is a diagram illustrating a configuration of a user terminal according to another embodiment.

19, a user terminal 1900 according to another embodiment includes a receiving unit 1930, a control unit 1910, and a transmitting unit 1920.

The receiver 1930 receives downlink control information, data, and a message from the base station through the corresponding channel.

Further, the controller 1910 transmits uplink control information on the uplink data transmission channel of the small cell and the UE belonging to any of the cell / base station / RRH / antenna / RU under the multi-layer cell structure necessary for performing the above- And controls the overall operation of the UE according to UCI mapping and transmission on the uplink PUSCH mapping and transmitting.

The transmitter 1920 transmits uplink control information, data, and a message to the base station through the corresponding channel.

19 is a terminal belonging to a first base station and a second base station, and the controller 1910 controls HARQ-ACK, RI, CQI, and the like, which are control information, on a PUSCH to be transmitted to the first base station or the second base station. PMI, and the transmitter 1920 transmits the PUSCH to which the control information is mapped as an uplink signal. Here, the PUSCH has one reference signal per subframe, or the PUSCH uses multiple subframes or multiple TTI structures.

The first to seventh embodiments will be described as follows.

The control unit 1910 determines whether or not a reference signal corresponding to one reference signal is present in each of the at least one subframe, The HARQ-ACK may be mapped using one or two symbols, and the RI may be mapped to a symbol except for two neighboring symbols of the symbol.

The terminal of the second embodiment has been described with reference to -2, -2, -2, and -2, and the control unit 1910 determines whether or not each of the near- Mapped to the HARQ-ACK, and maps the RI from the next resource of the resource to which the mapping of the HARQ-ACK is completed.

3, -3, -2, -3, -3 and -2, the controller 1910 controls the PUSCH to be transmitted to the first base station or the second base station, The second position of the second slot corresponding to the first position of the first slot is avoided by confirming the first position of the first slot to which the reference signal is mapped among the two slots included in each of the one or more sub- And maps at least one of the HARQ-ACK, the RI, the CQI, and the PMI.

The control unit 1910 determines whether the CQI on the PUSCH or the PMI is mapped on the same time axis as the area mapped to the PMI on the PUSCH And maps the HARQ-ACK or the RI first.

The terminal of the fifth embodiment has been described with reference to -5, -5, -5, and -5, and the control unit 1910 determines whether the terminal receives a reference signal among two slots included in each of at least one subframe And mapping the CQI and the PMI to the HARQ-ACK or RI after mapping the HARQ-ACK or RI.

The control unit 1910 identifies a first slot to which a reference signal is mapped among two slots included in each of one or more subframes, Allocates and maps the HARQ-ACK and the RI to a slot on a time axis, and maps the CQI and the PMI to resources allocated on the frequency axis.

The control unit 1910 identifies a slot to which the reference signal is not mapped among the two slots included in each of the one or more subframes, The CQI and the PMI are first allocated and mapped on the time axis, and after the allocation of the CQI and the PMI, the HARQ-ACK and the RI are mapped.

20 is a diagram illustrating a configuration of a base station according to another embodiment of the present invention.

Referring to FIG. 20, a base station 2000 according to another embodiment includes a control unit 2010, a transmitter 2020, and a receiver 2030.

The control unit 2010 maps uplink control information on an uplink data transmission channel of a small cell and a cell belonging to any cell / base station / RRH / antenna / RU under a multi-layer cell structure necessary for performing the above- And controls the overall operation of the base station by mapping and transmitting the UCI on the uplink PUSCH.

The transmitting unit 2020 and the receiving unit 2030 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the terminal.

In more detail, the base station of FIG. 20 receives control information in the uplink from the terminals belonging to the first base station and the second base station. The base station of FIG. 20 may be the first base station or the second base station. The receiving unit 2030 receives the PUSCH transmitted by the UE and the control unit 2010 decodes HARQ-ACK, RI, CQI, and PMI, which are control information mapped to the received PUSCH. Also, the PUSCH has one reference signal per subframe, or the PUSCH uses multiple subframes or multiple TTI structures.

The first to seventh embodiments will be described as follows.

1, -1, -1, and -1, and the control unit 2010 determines that the reference signal of one symbol in each of the one or more subframes Decodes the HARQ-ACK mapped to one or two neighboring symbols, and decodes the RI mapped to a symbol except for two symbols in the vicinity of the symbol.

The base station of the second embodiment has been described with reference to -2, -2, -2, and -2, and the control unit 2010 determines whether or not a near one of the symbols in which one reference signal is located in each of the one or more sub- Decodes the HARQ-ACK mapped to the HARQ-ACK, and decodes the RI mapped from the next resource of the HARQ-ACK-mapped resource.

3, -3, -2, -3, -3 and -2 in the third embodiment, the control unit 2010 includes one or more subframes of the PUSCH And decodes the mapped control information by avoiding the second position of the second slot corresponding to the first position of the first slot to which the reference signal is mapped.

The base station of the fourth embodiment has been described in (4), (-4), (-4), (-4) and (-4). The control unit 2010 determines the CQI or the PMI mapping on the PUSCH And decodes the HARQ-ACK or the RI.

5, -5, -5, and -5, the control unit 2010 determines the time axis of a slot in which one reference signal is located in each of the one or more subframes And decodes the HARQ-ACK or the RI allocated and mapped first.

The base station of the sixth embodiment has been described with reference to the reference numeral -1 and the reference numeral -1, and the control unit 2010 determines whether or not a reference signal is mapped on the time axis of the first slot, Decodes the mapped HARQ-ACK and the RI, and allocates resources opposite to the frequency axis to decode the mapped CQI and the PMI.

The base station of the seventh embodiment has been described with reference to D-2 and D-2, and the controller 2010 determines whether the reference signal is mapped to a time axis of a slot to which a reference signal is not mapped, CQI and PMI are decoded.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

Claims (32)

A method for transmitting control information in a UL on a terminal belonging to a first base station and a second base station,
(Hybrid Automatic Retransmission ReQuest Acknowledgment), RI (Rand Indicator), CQI (Channel Quality Indicator), and PMI (Precoding Matrix) to the PUSCH (Physical Uplink Shared CHannel) to be transmitted to the first base station or the second base station. A mapping unit for mapping the mapping information to the mapping information; And
And transmitting the PUSCH to which the control information is mapped as an uplink signal,
Wherein the PUSCH has one reference signal per subframe or the PUSCH uses multiple subframes or multiple transmission time interval (TTI) structures.
The method according to claim 1,
The mapping step
Mapping the HARQ-ACK using both one or two symbols near a symbol in which one reference signal is located in each of the one or more subframes; And
Further comprising mapping the RI to a symbol except for two nearby symbols of the symbol.
The method according to claim 1,
The mapping step
Mapping the HARQ-ACK to one neighbor symbol of a symbol in which one reference signal is located in each of the one or more subframes; And
Mapping the RI from the next resource of the resource to which mapping of the HARQ-ACK is completed.
The method according to claim 1,
The mapping step
A first position of a first slot in which a reference signal is mapped among two slots included in each of at least one subframe of a PUSCH to be transmitted to a first base station or a second base station, And mapping at least one of the HARQ-ACK, the RI, the CQI, or the PMI by avoiding a second position of the second slot.
The method according to claim 1,
The mapping step
Mapping the HARQ-ACK or the RI first on the PUSCH; And
Mapping the CQI or the PMI on the same HARQ-ACK or the same time axis to which the RI is mapped.
The method according to claim 1,
The mapping step
Mapping the HARQ-ACK or RI to a time axis of the slot in which the UE receives the reference signal among the two slots included in each of the one or more subframes so as not to overlap; And
Mapping the CQI, PMI after mapping the HARQ-ACK or RI.
The method according to claim 1,
The mapping step
Determining a first slot to which a reference signal is mapped among two slots included in each of at least one subframe, and allocating and mapping HARQ-ACK and RI to the first slot on a time axis; And
And allocating and mapping the CQI and the PMI from a resource opposite to the frequency axis in the HARQ-ACK and the resource mapped with the RI.
The method according to claim 1,
The mapping step
Determining a slot to which a reference signal is not mapped among two slots included in each of the one or more subframes, and allocating and mapping CQI and PMI on the time axis first; And
And mapping HARQ-ACK and RI after assignment of the CQI and PMI.
A method for receiving control information in an uplink from a terminal belonging to a first base station and a second base station,
Receiving a Physical Uplink Shared CHannel (PUSCH) transmitted by the MS; And
(RI), a channel quality indicator (CQI), and a Precoding Matrix Indicator (PMI), which are control information mapped to the received PUSCH,
Wherein the PUSCH has one reference signal per subframe or the PUSCH uses multiple subframes or multiple transmission time interval (TTI) structures.
10. The method of claim 9,
The decoding step
The base station decoding the HARQ-ACK mapped to one or two neighboring symbols of a symbol in which one reference signal is located in each of the one or more subframes; And
And decoding the RI mapped to a symbol excluding two symbols near both of the symbol.
10. The method of claim 9,
The decoding step
Decoding the HARQ-ACK mapped to one of neighbor symbols of a symbol in which one reference signal is located in each of the one or more subframes; And
And decoding the RI mapped from the next resource of the HARQ-ACK-mapped resource.
10. The method of claim 9,
The decoding step
And decoding the mapped control information by avoiding the second position of the second slot corresponding to the first position of the first slot to which the reference signal is mapped among the two slots included in the at least one subframe of the PUSCH How to.
10. The method of claim 9,
The decoding step
And decoding the HARQ-ACK or RI allocated and mapped on the same time axis as the CQI or the PMI mapping on the PUSCH.
10. The method of claim 9,
The decoding step
And decoding the mapped HARQ-ACK or RI in a time axis of a slot in which one reference signal is located in each of the one or more subframes.
10. The method of claim 9,
The decoding step
Decoding the HARQ-ACK and the RI that are allocated and mapped on a time axis of a first slot to which a reference signal is mapped among two slots included in each of the at least one subframe; And
And decoding the CQI and the PMI mapped by allocating from resources opposite to the frequency axis.
10. The method of claim 9,
The decoding step
And decoding the CQI and PMI mapped to the time axis of the slot to which the reference signal is not mapped among the two slots included in each of the one or more subframes.
1. A terminal that belongs to multiple cells and transmits control information in an uplink,
(Hybrid Automatic Retransmission ReQuest Acknowledgment), RI (Rand Indicator), CQI (Channel Quality Indicator), and PMI (Precoding Matrix Indicator), which are control information, to the PUSCH (Physical Uplink Shared CHannel) to be transmitted to the first base station or the second base station. ); And
And a transmitter for transmitting the PUSCH to which the control information is mapped as an uplink signal,
Wherein the PUSCH has one reference signal per subframe or the PUSCH uses multiple subframes or multiple transmission time interval (TTI) structures.
18. The method of claim 17,
The control unit
Mapping the HARQ-ACK using both one or two neighboring symbols of a symbol in which one reference signal is located in each of the one or more subframes, and mapping the RI to a symbol excluding two neighboring symbols of the symbol .
18. The method of claim 17,
The control unit
Mapping the HARQ-ACK to one of neighbor symbols of a symbol in which one reference signal is located in each of the one or more subframes, and mapping the RI from the next resource of the resource to which mapping of the HARQ-ACK is completed. Terminal.
18. The method of claim 17,
The control unit
A first position of a first slot in which a reference signal is mapped among two slots included in each of at least one subframe of a PUSCH to be transmitted to a first base station or a second base station, And maps at least one of the HARQ-ACK, the RI, the CQI, and the PMI by avoiding the second position of the second slot.
18. The method of claim 17,
The control unit
And maps the HARQ-ACK or the RI on the same time axis as the CQI or the PMI-mapped region on the PUSCH.
18. The method of claim 17,
The control unit
The UE maps the HARQ-ACK or the RI to the time axis of the slot in which the reference signal is located among the two slots included in each of the one or more subframes so that the HARQ-ACK or RI does not overlap and maps the CQI and PMI after mapping the HARQ- .
18. The method of claim 17,
The control unit
A first slot in which a reference signal is mapped among two slots included in each of one or more subframes, allocates and maps the HARQ-ACK and the RI to the first slot on a time axis, and maps the CQI and the PMI And allocates and allocates resources opposite to the frequency axis.
18. The method of claim 17,
The control unit
A slot in which a reference signal is not mapped among two slots included in each of the one or more subframes, allocates and maps CQI and PMI on a time axis in the slot, maps HARQ-ACK and PMI And maps the RI.
A base station for receiving control information in an uplink from a terminal belonging to multiple cells,
A receiving unit for receiving a Physical Uplink Shared CHannel (PUSCH) transmitted by the UE; And
And a controller for decoding HARQ-ACK (Hybrid Automatic Retransmission ReQuest Acknowledgment), RI (Rand Indicator), CQI (Channel Quality Indicator), and PMI (Precoding Matrix Indicator), which are control information mapped to the received PUSCH,
Wherein the PUSCH has one reference signal per subframe or the PUSCH uses multiple subframes or multiple transmission time interval (TTI) structures.
26. The method of claim 25,
The control unit
The base station decodes the HARQ-ACK mapped to one or two neighboring symbols of a symbol in which one reference signal is located in each of the one or more subframes, And decodes the RI.
26. The method of claim 25,
The control unit
Decodes the HARQ-ACK mapped to one neighbor symbol of a symbol in which one reference signal is located in each of the one or more subframes, and decodes the RI mapped from the next resource of the HARQ-ACK-mapped resource .
26. The method of claim 25,
The control unit
And a second position of a second slot corresponding to a first position of a first slot to which a reference signal is mapped among two slots included in each of at least one subframe of the PUSCH is avoided and the mapped control information is decoded. .
26. The method of claim 25,
The control unit
And decodes the HARQ-ACK or the RI mapped on the same time axis as the CQI or the PMI mapping on the PUSCH.
26. The method of claim 25,
The control unit
Wherein the HARQ-ACK or RI is allocated in a time axis of a slot where one reference signal is located in each of the one or more subframes, and decodes the mapped HARQ-ACK or RI.
26. The method of claim 25,
The control unit
Wherein the HARQ-ACK and the RI are allocated on a time axis of a first slot to which a reference signal is mapped among the two slots included in each of the at least one subframe, And decoding the mapped CQI and the PMI.
26. The method of claim 25,
The control unit
Wherein the CQI and the PMI mapped to the time axis of a slot to which a reference signal is not mapped among the two slots included in each of the at least one subframe are decoded.

Images