KR20140047495A - Method for controlling uplink power with terminal and terminal thereof - Google Patents

Abstract

The present invention relates to a method for controlling an uplink power of a terminal and the terminal thereof. The present invention relates to an apparatus and a method for controlling an uplink power of a terminal under carrier aggregation. According to an embodiment of the present invention, the method for controlling an uplink power of a terminal includes a step of comprising a multiple timing advanced group (TAG); and a step of setting a resource element for a physical uplink shared channel (PUSACH) not to map the resource element onto the last symbol of a sub frame.

Description

Method for controlling uplink power of terminal and its terminal {Method for Controlling Uplink Power with Terminal and Terminal}

The present invention relates to a method and apparatus for multiplexing an uplink channel and an uplink reference signal transmitted from a user equipment to uplink under carrier aggregation and controlling uplink power.

Under carrier aggregation, which transmits and receives a signal through two or more component carriers, the terminal transmits uplink data, a control channel, and an uplink signal to the transmit / receive point at the same time. The transmission advanced (TA) value is equally applied to all different component carriers or all different serving cells as a single value.

However, when multiple transmission TA values of the UE are indicated, multiplexing methods or power control methods between uplink channels applied in a single TA between different CCs or CC cell groups are used. It needs to be applied differently.

In one aspect, the present invention comprises the steps of configuring multiple TAG (Timing Advanced Group); And setting not to map resource elements for the PUSCH to the last symbol of the subframe transmitting the PUSCH when simultaneously transmitting a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) on the same cell. Provides an uplink power control method.

In another aspect, the present invention provides a method comprising the steps of: configuring multiple Timing Advanced Groups (TAGs); And totally overlapping a symbol transmitting SRS and PUCCH / PUCCH on other cells when simultaneously transmitting a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) on other cells. When the transmission power exceeds the maximum allowable transmission power (P _CMAX ) of the terminal provides an uplink power control method of the terminal comprising the step of dropping the SRS in the subframe transmitting the SRS.

In another aspect, the present invention provides a method comprising the steps of: configuring multiple TAG (Timing Advanced Group); And when the total transmission power exceeds the maximum allowable transmission power (P _CMAX ) of the UE in the overlapping part of the symbol transmitting the SRS and the SRS on other cells when simultaneously transmitting a SRS and a SRS on other cells. It provides an uplink power control method of a terminal including performing the same scaling to set the transmission power of the SRS.

In another aspect, the present invention provides a receiver for receiving configuration information constituting multiple TAG; And a control unit configured to not map resource elements for the PUSCH to the last symbol of the subframe in which the PUSCH is transmitted when the multiple TAGs are configured and the SRS and the PUSCH are simultaneously transmitted on the same cell.

In another aspect, the present invention provides a receiver for receiving configuration information constituting multiple TAG; And a symbol for transmitting SRS and PUCCH / PUCCH on other cells when multiple TAGs are configured and simultaneously transmit a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) on other cells. When the total transmission power in the overlapping portion exceeds the maximum allowable transmission power (P _CMAX ) of the terminal provides a terminal including a control unit for setting to drop the SRS in the subframe transmitting the SRS.

In another aspect, the present invention provides a receiver for receiving configuration information constituting multiple TAG; And when the total transmit power exceeds the maximum allowable transmit power (P _CMAX ) of the UE in the overlapping part of the symbol transmitting SRS and SRS on other cells when multiple TAGs are configured and simultaneously transmit SRS and SRS on other cells. It provides a terminal including a control unit for implementing the same scaling to set the transmission power of the SRS.

1 illustrates an example of a wireless communication system to which embodiments are applied.
FIG. 2 is a diagram illustrating a HARQ ACK / NACK and CSI concurrent transmission structure using PUCCH format 2.
3 is a conceptual diagram of an uplink data channel / control channel and an SRS when a single TA is applied.
FIG. 4 is a symbol overlapping between an uplink data channel / control channel and an SRS between different CCs or a CC group when a transmission TA value of the UE is indicated as multiple; ) Or a collision.
5 is a flowchart of an uplink power control method of a terminal according to the first embodiment.
6 is a conceptual diagram of an uplink power control method of a terminal according to the first embodiment.
7 is a flowchart of an uplink power control method of a terminal according to the second embodiment.
8 is a conceptual diagram of a power control method of a terminal according to the second embodiment.
9 is a flowchart of an uplink power control method of a terminal according to the third embodiment.
10 is a conceptual diagram of an uplink power control method of a terminal according to the third embodiment.
11 is a system flowchart of an uplink power control method according to another embodiment.
12 is a diagram illustrating a configuration of a transmission and reception point according to another embodiment.
13 is a diagram illustrating a configuration of a user terminal according to another embodiment.

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. The wireless communication system includes a user equipment (UE) and a transmission / reception point. In the present specification, a user terminal is a generic concept meaning a terminal in wireless communication. In addition, user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.

A transmission / reception point generally refers to a station communicating with a user terminal, and includes a base station (BS) or a cell, a node, a node-B, an evolved node-B, and a sector. ), A site, a base transceiver system (BTS), an access point, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and an antenna.

That is, in the present specification, a transmission / reception point or a base station and a cell refer to a comprehensive area representing a partial area or function covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as meaning and encompasses various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, remote radio head (RRH), and radio unit (RU) communication range. to be.

In this specification, a user terminal and a transmission / reception point are used in a generic sense as two transmission / reception entities used to implement the technology or technical idea described in the present specification, and are not limited by the terms or words specifically referred to. The user terminal and the transmission and reception point is used in a comprehensive sense as two (uplink or downlink) transmission and reception subjects used to implement the technology or the technical idea described in the present invention and are not limited by the terms or words specifically referred to. Here, the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal, the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.

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-A, 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. In the present specification, the PDCCH is a concept including an ePDCCH.

In the present specification, a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be. In the present specification, a transmission / reception point refers to a transmission point for transmitting a signal or a reception point for receiving a signal and a combination thereof.

In the present specification, HARQ ACK / NACK means Hybrid ACK / NACK acknowledge. CSI means channel state information or channel state information report such as RI (Rank Indicator), Precoding Matrix Indicator (PMI), and Channel Quality Indicator (CQI).

1 illustrates an example of a wireless communication system to which embodiments are applied.

Referring to FIG. 1, a wireless communication system 100 to which embodiments are applied includes a coordinated multi-point transmission / reception system (CoMP system) or cooperative system in which two or more transmission / reception points cooperate to transmit a signal. It may be a coordinated multi-antenna transmission system, a cooperative multi-cell communication system. The CoMP system 100 may include at least two transmission / reception points 110 and 112 and terminals 120 and 122.

The transmission / reception point is a base station or a macro cell (macro cell or macro node 110, hereinafter referred to as an 'eNB' or a first transmission / reception point) and a high transmission that is wired controlled by being connected to the first transmission / reception point 110 by an optical cable or an optical fiber. It may also be at least one pico cell (picco cell 112, hereinafter referred to as 'RRH' or second transmission and reception point) having power or low transmission power in the macro cell region. The first transmission and reception point 110 and the second transmission and reception point 112 may have the same cell ID or may have different cell IDs.

Hereinafter, downlink (downlink) means a communication or communication path from the transmission and reception points (110, 112) to the terminal 120, the uplink (uplink) from the terminal 120 to the transmission and reception points (110, 112) Or a communication path. In downlink, the transmitter may be part of the transmission / reception points 110 and 112 and the receiver may be part of the terminals 120 and 122. In uplink, the transmitter may be part of the terminal 120 and the receiver may be part of the transmission / reception points 110 and 112.

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'.

The first transmission / reception point 110, which is one of the transmission and reception points 110 and 112, may perform downlink transmission to the terminals 120 and 122. The first transmission / reception point 110 includes downlink control information such as a physical downlink shared channel (PDSCH), which is a main physical channel for unicast transmission, and scheduling required for reception of the PDSCH and uplink. A physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission of a link data channel (for example, a physical uplink shared channel (PUSCH)) may be transmitted. In the following description, transmission and reception of a signal through each channel will be described in the form of transmission and reception of the corresponding channel.

The first terminal 120 and UE1 may transmit an uplink signal to the first transmission / reception point 110. The second terminal 122 and the UE2 may transmit an uplink signal to the second transmission / reception point 112 among the transmission and reception points 110 and 112. In this case, the first terminal 120 may transmit an uplink signal to the second transmission / reception point 112, and the second terminal 122 may transmit an uplink signal to the first transmission / reception point 110. In addition, the number of terminals may be two or more. However, in the following embodiment, the number of terminals is two, one terminal is described as an uplink signal to the first transmission and reception point 110, the other terminal to the second transmission and reception point 112 by way of example.

In this case, as described with reference to the drawings below, the first terminal 120 transmits an uplink signal to the first transmission / reception point 110 and the second terminal 122 transmits an uplink signal to the second transmission / reception point 112. Can transmit

In a wireless communication system, a terminal transmits an uplink demodulation signal (UL DMRS or UL DM-RS) every slot in order to determine channel information for demodulation of a data channel during uplink transmission. In case of an uplink DM-RS associated with a PUSCH (Physical Uplink Shared CHannel), a reference signal is transmitted for one symbol in every slot, and in case of an uplink DM-RS associated with a physical uplink control channel (PUCCH), a PUCCH According to the type, three symbols are transmitted in every slot in the case of PUCCH format 1 / 1a / 1b or two symbols in every slot in the case of PUCCH format 2 / 2a / 2b / 3.

The physical uplink control channel (PUCCH) used as the uplink control channel is classified according to the type of information transmitted from the terminal as shown in the following table.

PUCCH format Modulation scheme

Number of bits per subframe ,

One N / A N / A 1a BPSK One 1b QPSK 2 2 QPSK 20 2a QPSK + BPSK 21 2b QPSK + QPSK 22 3 QPSK 48

PUCCH format 1 / 1a / 1b may be used for scheduling request (SR) and HARQ-ACK transmission. The PUCCH format 2 / 2a / 2b may be used for CQI (Channel Quality Indicator) / PMI (Precoding Matrix Indicator) / RI (Rank Indication) transmission. And, PUCCH format 3 can be used for multiple HARQ ACK / NACK transmission.

A description of the format of each PUCCH and its use will be given below.

That is, PUCCH format 1 is a channel format for transmitting only SR (Scheduling Request). The PUCCH format 1a / 1b is a channel for transmitting an ACK / NACK for a Scheduling Request (SR) and / or a downlink data channel, and is divided into a format 1a / 1b according to the number of bits of ACK / NACK and a modulation scheme . Meanwhile, the shortened PUCCH format 1a / 1b is a format in which the last SC-FDMA symbol of one subframe is punctured in the PUCCH format 1a / 1b that transmits ACK / NACK. Whether or not the format is used is determined by the RRC parameter according to the instruction of the upper layer of the transmission / reception point, whether the ackNackSRS-SimultaneousTransmission is TRUE / FALSE, and the cell-specific information configuration of the SRS.

PUCCH Format 2 is a channel format for transmitting only CQI. PUCCH format 2a / 2b is a channel for transmitting ACK / NACK for CQI + downlink data channel, and is divided into 2a / 2b according to the number of bits of ACK / NACK and the modulation method.

PUCCH format 3 is a channel for transmitting 4 or more bits of ACK / NACK under downlink carrier aggregation. Shortened PUCCH format 3 is a format in which the last SC-FDMA symbol of one subframe is punctured (i.e., resource elements are not mapped) in PUCCH format 3 transmitting ACK / NACK. Whether or not the format is used is determined by the RRC parameter according to the instruction of the upper layer of the transmission / reception point, whether the ackNackSRS-SimultaneousTransmission is TRUE / FALSE, and the cell-specific information configuration of the SRS.

Meanwhile, in the LTE communication system, which is one of the current wireless communication methods, a demodulation reference signal (DMRS, DM-RS) and a sounding reference signal (SRS) are defined in the uplink, and the downlink Three reference signals (RSs) are defined in the cell, a cell-specific reference signal (CRS), and an MBSFN reference signal (Multicast / Broadcast over Single Frequency Network Reference Signal; MBSFN-RS). And a UE-specific reference signal.

The uplink SRS is used for measuring the uplink channel state for uplink frequency dependent scheduling or for measuring the uplink / downlink channel state for downlink beamforming using channel reciprocity in the TDD system. In the case of a sounding reference signal, parameters for generating an SRS transmitted from an arbitrary transmission / reception point or an arbitrary cell to a UE in the wireless communication system 100, for example, a cell-specific SRS band of SRS (SRS) bandwidth, a transmission comb (2 frequency sub-carriers assigned to subcarrier spacing intervals such as 0 (even subcarriers) or 1 (odd subcarriers) specific SRS bandwidth, hopping related configuration parameters, frequency domain position, periodicity, subframe configuration (SRS in some subframes, (The number of antennas to transmit SRS, the number of antenna ports), the base sequence index (the SRS sequence index for generating the corresponding SRS is set to the sequence group number u used in the PUCCH and the sequence hopping configuration) And the cyclic shift index (cyclic shift index as a reference signal used for generating the SRS) and the like are transmitted to the terminal 120 as the RRC parameter, and the terminal 120 transmits the cyclic shift index (determined according to the determined sequence number v) And receives the corresponding information and transmits the uplink SRS.

In addition, aperiodic SRS is defined along with periodic SRS. Similar to the periodic SRS, the corresponding aperiodic SRS is a parameter for generating an aperiodic SRS transmitted by the terminal as used in the wireless communication system 100, for example, various parameters used for generating the aperiodic SRS. Any transmit / receive point transmits UE-specific SRS band, transmit comb, frequency domain location, period, subframe configuration, antenna configuration, base sequence index, cyclic shift index, etc. of aperiodic SRS to UE 120 as an RRC parameter. do.

In order to transmit the aperiodic SRS, any transmission / reception point dynamically transmits the aperiodic SRS through the PDCCH to the terminal 120, and the terminal 120 receives triggering and RRC parameters by the PDCCH, And transmits aperiodic SRS.

Hereinafter, the operation of the UE in a case where simultaneous transmission of the uplink PUCCH and the sounding reference signal in one subframe is considered will be described.

In the case where simultaneous transmission of PUCCH and SRS is considered, the UE determines the format type of the PUCCH and the type of SRS, i.e., the periodic SRS (type-0 SRS, hereinafter referred to as 'periodic SRS' , 'Non-periodic SRS'), and the operation under a situation where a multi-element carrier is introduced is defined separately.

The periodic SRS and aperiodic SRS and the operation method of the UE according to each PUCCH format type are as follows.

i) If the PUCCH format 2 / 2a / 2b and periodic SRS occur simultaneously in the same subframe, the UE does not transmit periodic SRS.

ii) PUCCH format with ACK / NACK The UE does not transmit aperiodic SRS when concurrent transmissions occur in the same subframe with 2 / 2a / 2b and aperiodic SRS.

iii) When PUCCH format 2 without ACK / NACK and aperiodic SRS occur in the same subframe simultaneously, the terminal does not transmit PUCCH format 2.

iv) If simultaneous transmission occurs in the same subframe as the PUCCH format and SRS (regardless of periodic SRS or aperiodic SRS) carrying ACK / NACK and SR at the same time or only one of them, ackNackSRS- defined by higher layer. If SimulataneousTransmission is FALSE, the UE does not transmit the SRS.

v) If simultaneous transmission occurs in the same subframe, the shortened PUCCH format carrying either ACK / NACK and positive SR simultaneously or only one of them and SRS (regardless of periodic or non-periodic SRS) is defined by the higher layer. If ackNackSRS-SimulataneousTransmission is TRUE, the UE transmits both shortened PUCCH format and SRS.

vi) Simultaneous transmissions occur in the same subframe using the normal PUCCH format, in which the PUCCH format carries either a positive ACK / NACK and a positive SR simultaneously or only one, and the SRS (regardless of periodic or aperiodic SRS) in any serving cell. If it does not transmit the SRS.

vii) ackNackSRS-SimultaneousTransmission provided in an upper layer as an RRC parameter is a parameter for the UE to configure simultaneous transmission of SRS in the same subframe as HARQ ACK / NACK on the PUCCH. If it is set to support simultaneous transmission of HARQ ACK / NACK and SRS on a PUCCH in one subframe, the corresponding subframe may be allocated to a cell-specific SRS subframe in the first cell (primary cell) The UE simultaneously transmits HARQ ACK / NACK and SRS using the shortened PUCCH format. At this time, the shortened PUCCH format is used regardless of whether the SRS is transmitted in the corresponding subframe. Otherwise, the UE transmits HARQ ACK / NACK and SRS using normal PUCCH format 1 / 1a / 1b or normal PUCCH format 3.

Hereinafter, the operation of the UE in a case where simultaneous transmission of ACK / NACK and periodic CSI is considered in the uplink PUCCH within one subframe will be described.

FIG. 2 is a diagram illustrating a HARQ ACK / NACK and CSI concurrent transmission structure using PUCCH format 2.

Referring to (a) of FIG. 2, in case of a normal CP, when simultaneous transmission of HARQ ACK / NACK and CSI is performed in PUCCH format 2, 10 symbols per subframe exist when the CSI transmission information is block coded and QPSK modulated. The first five symbols are sent in the first slot and the remaining five symbols are sent in the second slot.

There are 7 DFTS-OFDM symbols per slot. Two of the seven DFTS-OFDM symbols of each slot are used for uplink DM-RS transmission. In simultaneous transmission of HARQ ACK / NACK and CSI, a second DM-RS symbol in each slot is modulated by HARQ ACK / NACK. BPSK or QPSK modulation is used depending on whether the information fed back is one or two HARQ ACK / NACK bits. Each of the QPSK symbols and the second of the DM-RS symbols, modulated by HARQ ACK / NACK, transmitted in five symbols of each slot are multiplied by a cyclic shifted length-12 cell-specific sequence and the result is It is transmitted in the corresponding DFTS-OFDM symbol.

 Referring to (b) of FIG. 2, in case of an extended CP, the same structure is used in the case of an extended CP having six DFTS-OFMS symbols per slot, but only one uplink DM-RS symbol exists per slot instead of two. When block coding and QPSK modulation of CSI transmission information and HARQ ACK / NACK, there are 10 symbols per subframe, the first 5 symbols are transmitted in the first slot, and the remaining 5 symbols are transmitted in the second slot. . Each QPSK symbol transmitted in five symbols of each slot is multiplied by a cell-specific sequence of cyclic shifted length 12 and the result is transmitted to the corresponding DFTS-OFDM symbol.

For example, simultaneousAckNackAndCQI provided in an upper layer as an RRC parameter is a parameter for the UE to configure simultaneous transmission of HARQ ACK / NACK and periodic CSI in the same subframe. When configured to configure simultaneous transmission of HARQ ACK / NACK and periodic CSI in one subframe, the UE can simultaneously transmit HARQ ACK / NACK and periodic CSI using PUCCH formats 2a / 2b in the corresponding subframe.

In the following case, there is a power limited case of the terminal (power limited case) and there is a case where there is no power limitation of the terminal (non-power limited case) between the uplink channel and the uplink channel under the carrier aggregation (carrier aggregation) and A method related to power control between sounding reference signals and between sounding reference signals will be described.

를 넘는 경우에는 단말은 서빙 셀(serving cell, c)를 위한 PUSCH의 전송 전력을 결정함에 있어서 PUCCH의 전력을 우선시 하도록 설정하고 나머지 전송 전력에 대해서 PUSCH의 전송 전력을 0과 1사이의 값으로 스케일링을 수행하여 해당 PUSCH의 전송 전력을 결정한다. The sum of the total transmission powers of the UEs for the UEs configured for simultaneous transmission of PUCCH and PUSCH

In case of exceeding the UE, the UE sets priority of PUCCH in determining transmission power of PUSCH for serving cell (c) and scales transmission power of PUSCH to a value between 0 and 1 for the remaining transmission power. By performing the transmission power of the corresponding PUSCH is determined.

을 스케일링을 수행한다.
In the above situation, the UE determines the transmit power of the corresponding PUSCH by the following equation. The UE for the serving cell in subframe i so that the condition of Equation 1 below is satisfied

Perform scaling.

[Equation 1]

는

의 선형값(linear value)이고

는

의 선형 값이고

은 서브프레임 i에 대해 단말에 구성된 총 최대전송전력

(UE total configured maximum output power

)의 선형 값이고

는

으로 서빙 셀 c에 대한

의 스케일링 요소(scaling factor)이다. 이때 서브프레임 i에서 PUCCH 미전송시

이다.
In Equation (1)

The

Is the linear value of

The

Is a linear value of

Is the total maximum transmit power configured in the terminal for subframe i

(UE total configured maximum output power

) Is a linear value

The

For serving cell c

Is a scaling factor of. If no PUCCH is transmitted in subframe i

to be.

를 넘는 경우에는 단말에서 서로 다른 요소 반송파 또는 서로 다른 서빙 셀에서 전송되는 PUSCH 들간의 전송 전력을 결정함에 있어서는 해당 PUSCH가 포함하는 정보가 UCI(Uplink Control Information)를 포함하고 있느냐의 여부에 따라 UCI를 가지는 PUSCH를 전송하는 서빙 셀 또는 요소 반송파를 우선하여 PUSCH 전송 전력을 할당하도록 하고 나머지 서빙 셀(들) 또는 요소 반송파들간에 동일한 스케일링 요소(scaling factor)를 가지고 스케일링을 수행하여 PUSCH 전송 전력을 결정하게 된다. 여기서 특정 서빙 셀(들) 또는 요소 반송파에 대해서 스케일링 요소를 0으로 설정할 수도 있다. On the other hand, the sum of the total transmission power of the terminal

In case of exceeding, in determining the transmission power between PUSCHs transmitted by different CCs or different serving cells, the UE determines UCI according to whether information included in the corresponding PUSCH includes uplink control information (UCI). Branch to allocate the PUSCH transmission power first to the serving cell or component carrier transmitting the PUSCH and to perform scaling with the remaining scaling cell (s) or component carriers to determine the PUSCH transmission power do. Here, the scaling factor may be set to 0 for a specific serving cell (s) or component carrier.

를 초과하면 단말은 수학식 2의 조건이 만족되도록 서브프레임 i에서 UCI를 포함하지 않은 서빙 셀에 대한

를 스케일링을 수행한다.In the above situation, the UE determines the transmit power of the corresponding PUSCH by the following equation. The UE performs PUSCH transmission including UCI on serving cell j and PUSCH transmission including no UCI in the remaining serving cell (s).

If is exceeded, the UE for a serving cell that does not include UCI in subframe i so that the condition of Equation 2 is satisfied.

Perform scaling.

&Quot; (2) "

는 UCI를 포함하는 셀에 대한 PUSCH 전송전력이고

는 UCI를 포함하지 않는 서빙 셀 c에 대한

의 스케일링 요소(scaling factor)이다. 이 경우에

이고 단말의 총 전송전력이

를 초과하지 않으면 전력 스케일링이

에 적용되지 않는다.

는

일 때 서빙 셀들 사이에서 동일하지만 특정 서빙 셀(들)에 대한

은 "0"일 수 있다.In Equation 2,

Is the PUSCH transmit power for the cell containing UCI

For serving cell c that does not contain UCI

Is a scaling factor of. In this case

And the total transmit power of the terminal

Power scaling does not exceed

Does not apply to

The

Is the same between serving cells but for a particular serving cell (s)

May be "0".

를 넘는 경우에는 단말에서 서로 다른 요소 반송파 또는 서로 다른 서빙 셀에서 전송되는 UCI가 있는 PUCCH+PUSCH와 UCI가 없는 PUSCH 들간의 전송 전력을 결정함에 있어서는 가장 우선순위로 PUCCH의 전송 전력을 보장하도록 하고, 다음으로 UCI를 가지는 PUSCH의 전송 전력을 보장하도록 설정하며, 나머지 단말의 전송 전력에 대해서 나머지 서빙 셀(들) 또는 요소 반송파들 간에 동일한 스케일링 요소를 가지고 스케일링을 수행하여 PUSCH 전송 전력을 결정하게 된다. 여기서 특정 서빙 셀(들) 또는 요소 반송파에 대해서 스케일링 요소를 0으로 설정할 수도 있다. In other words, the sum of the total transmit power of

In case of exceeding the UE, the UE determines the transmission power of PUCCH + PUSCH with UCI transmitted from different CCs or different serving cells and PUSCH without UCI. Next, the transmission power of the PUSCH having the UCI is set to be guaranteed, and the PUSCH transmission power is determined by performing scaling with the same scaling factor among the remaining serving cell (s) or component carriers with respect to the transmission power of the remaining UEs. Here, the scaling factor may be set to 0 for a specific serving cell (s) or component carrier.

를 초과하지 않을 때 단말은 아래 수학식 3에 따라

_{를 획득할 수 있다.} In the above situation, the UE determines the transmit power of the corresponding PUSCH by the following equation. UE performs simultaneous PUSCH transmission including PUCCH and UCI on serving cell j and performs PUSCH transmission without UCI in the remaining serving cell (s)

When not exceeding the terminal according to Equation 3 below

_{Can be obtained.}

&Quot; (3) "

를 넘는 경우에는 단말에서 서로 다른 요소 반송파 또는 서로 다른 서빙 셀에서 전송되는 SRS들간의 전송 전력을 결정함에 있어서는 서빙 셀(들) 또는 요소 반송파들 간에 동일한 스케일링 요소를 가지고 스케일링을 수행하여 SRS의 전송 전력을 결정하게 된다. In other words, the sum of the total transmit power of

In case of exceeding, when the UE determines transmission power between SRSs transmitted from different CCs or different serving cells, the UE performs scaling with the same scaling factor between the serving cell (s) or CCs, thereby transmitting power of the SRS. Will be determined.

를 초과하면 단말은 수학식 4의 조건이 만족되도록 서브프레임 i에서 서빙 셀 c에 대한

를 스케일링할 수 있다.In the above situation, the terminal determines transmission power of corresponding SRSs by the following equation. The total transmission power of the terminal to the SRS

If is exceeded, the UE for the serving cell c in subframe i so that the condition of Equation 4 is satisfied.

Can be scaled.

&Quot; (4) "

는

의 선형 값이고

는 서브프레임 i에서

의 선형 값이고 는

으로 서빙 셀 c에 대한

의 스케일링 요소이다. 이때

는 서빙 셀들 사이에서 동일할 수 있다.In Equation 4,

The

Is a linear value of

In subframe i

Is a linear value of

For serving cell c

The scaling factor of. At this time

May be the same between the serving cells.

On the other hand, under carrier aggregation, when a UE simultaneously transmits uplink data, a control channel, and an uplink signal to a transmit / receive point to a transmit / receive point, the transmission timing advance (TA) of the terminal indicated from the transmit / receive point is transmitted. The value is equally applied to all different component carriers or all different serving cells with a single value. In the case where a single TA is applied, as described above, a multiplexing method or a power control method between uplink channels are used as an operation method of a terminal.

Previously, simultaneous transmission of an uplink data channel / control channel and an SRS in the same symbol was not supported for the same component carrier or other component carriers. In this case, when a single TA is applied as shown in FIG. 3, the symbol data overlapping between the uplink data channel / control channel and the SRS can be effectively avoided.

However, when multiple transmission TA values of the UE are indicated, multiplexing methods or power control methods between uplink channels applied in a single TA between different CCs or CCs are used. It needs to be applied differently. That is, since the boundary of the uplink SC-FDMA symbol in one subframe does not exactly match between different CCs or CCs, the corresponding UE moves up to a transmission / reception point. Ambiguity occurs in the transmission of the link data and the control channel and the uplink signal, so that both the transmitting and receiving point and the terminal cannot know how the operation of the terminal is performed.

In other words, when multiple transmission TA values of the UE are indicated as shown in FIG. 4, an uplink data channel or a control channel and an SRS between different CCs or CCs. Symbol overlapping, overlapping or collision problems within a symbol may occur. In addition, when CC0 (Pcell) and CC1 (Scell) are configured with different TAGs (TAG0, TAG1), ambiguity may occur for uplink channel and signal transmission in the UE in areas 410 and 420. Ambiguity with respect to uplink channel and signal reception may occur at a transmission / reception point.

Accordingly, multiplexing methods and power control methods for uplink data and control channels and uplink signals transmitted by a terminal when multiple TAGs are configured need to be defined.

The present invention relates to a transmission and multiplexing method for a control channel transmitted from an MS to an uplink under carrier aggregation, a method and an apparatus for multiplexing an uplink control channel and a sounding reference signal. Time Advanced Groups) provides a multiplexing and transmission method between uplink control channels, sounding reference signals and sounding reference signals, and an apparatus thereof.

In more detail, the UE operates when there is an uplink control channel or an uplink data channel and a sounding reference signal that the UE should transmit on different CCs in which multiple TAGs are configured under carrier aggregation. We need to redefine this.

In this case, in the present invention, when the corresponding multi-TAGs are configured, the behavior of the terminal is defined to ensure backward compatibility and the backward operation is not necessary. Can be defined.

In this case, even if the transmission / reception point is configured with multiple TAGs to the terminal, when two or more uplink component carriers are configured in the operation of the terminal, specific component carriers may have the same TAG. For example, when two UL carriers are configured, each CC may be configured to have the same TAG. For example, when three uplink component carriers are configured with three components, two component carriers may be configured with the same TAG and another component carrier may be configured with another TAG.

Therefore, in consideration of such a scenario, the uplink data channel and the sounding reference signal defined in a single TA are used for component carriers constituting the same TAG in the transmission of the uplink control channel or the uplink data channel and the sounding reference signal. The operation of the terminal can be defined to follow the transmission method of.

Since only a single TA has been supported in the past, in order to guarantee backward compatibility, even if multiple TAGs are configured, power limitations that a UE can transmit with respect to component carriers configured to have the same TAG are provided. In this case (power limited situation) and the case that there is a power (non-power limited situation) that can be transmitted by the terminal (non-power limited situation) can be set as described below the operation of the terminal.

1) In case of the same TAG for different component carriers or full overlap even in different TAGs, the operation of the UE in case of power limitation and simultaneous transmission of PUCCH or PUSCH and SRS is as follows. It can be defined as

In the case of PUCCH + SRS, when a PUCCH format 2 overlaps with aperiodic SRS transmission, aperiodic SRS may be transmitted. Except in this case, the operation of the UE may be defined to always drop the SRS.

In the case of PUSCH + SRS, if the PUSCH includes UCI, the power for the PUSCH including the UCI is guaranteed first, and the remaining transmission power is used for transmission of the SRS, and if there is no remaining transmission power, the SRS is used. Can be set to drop.

When PUCCH format 2 and aperiodic SRS transmission overlap with respect to the case of PUCCH + PUSCH + SRS, a PUSCH and an aperiodic SRS are set to be transmitted, and a PUSCH includes UCI for the transmission power of the corresponding PUSCH and the aperiodic SRS. In this case, power for the corresponding PUSCH may be guaranteed first, and the remaining transmission power may be configured to be used for aperiodic SRS transmission.

In this case, regardless of whether the PUSCH includes UCI or not, the PUSCH may be configured to puncture the last symbol of the corresponding subframe to which the SRS is to be transmitted so as not to map a resource element for the PUSCH. In other words, when the UE is configured with multiple TAGs and simultaneously transmits the SRS and the PUSCH on the same cell, the UE may be configured not to map resource elements for the PUSCH to the last symbol of the subframe transmitting the PUSCH. The above-described embodiment will be described in detail later with reference to FIGS. 5 and 6 as the first embodiment.

Except in this case, the operation of the terminal may be set to always drop the SRS. The corresponding subframe here may be a UE-specific aperiodic SRS subframe or a cell-specific SRS subframe. In more detail, the UE is configured with multiple TAGs and simultaneously transmits a SRS (Sounding Reference Signal) and a PUSCH (Physical Uplink Shared Channel) / PUCCH (Physical Uplink Control Channel) on other cells. If the total transmission power exceeds the maximum allowable transmission power ( Pcmax ) of the UE in the overlapped portion of the symbol transmitting the PUCCH (if the total transmission power exceeds Pcmax on any overlapped portion of the symbol) SRS in the subframe transmitting the SRS You can drop it. The above-described embodiment will be described in detail later with reference to FIGS. 7 and 8 as a second embodiment.

In the case of SRS + SRS, the transmission power of the SRS may be set by scaling with the same scaling value so as to have the same UE behavior as before. Specifically, the terminal has multiple TAGs and is limited in power, that is, if the total transmission power exceeds the maximum allowable transmission power ( Pcmax ) of the terminal (if the total transmission power exceeds Pcmax on any overlapped portion of the symbol) on other cells. When the SRS and the SRS are simultaneously transmitted, the same transmit power value may be scaled to set the transmit power of the SRS. The above-described embodiment will be described in detail later with reference to FIGS. 9 and 10 as a third embodiment.

2) In case of the same TAG for different component carriers or full overlap even in different TAGs, there is no power limitation and the operation of the UE in the case of being configured to transmit PUCCH or PUSCH and SRS simultaneously is mathematical It can be set to follow the above-described terminal operation described with reference to equations 1 to 4.

3) In the case of different TAG for different CCs and there is a power limitation in the case of not full overlapping (partially overlapping), the UE is configured to transmit PUCCH or PUSCH and SRS simultaneously. The operation can be defined as follows.

For the case of PUCCH + SRS, the UE may configure the UE to drop the SRS and transmit only the PUCCH.

For the case of PUSCH + SRS, the UE may configure the UE to drop the SRS and transmit only the PUSCH.

For the case of PUCCH + PUSCH + SRS, the UE may drop the SRS on the corresponding CC and set the PUCCH and the PUSCH to be the same as the transmission power setting method for simultaneous transmission of the PUCCH + PUSCH. As described above in the second embodiment, the terminal is configured with multiple TAGs, and when overlapping as well as partially in other TAGs, the Sounding Reference Signal (SRS) and Physical Uplink Shared Channel (PUSCH) / PUCCH on other cells. (Physical Uplink Control Channel) when the total transmission power exceeds the maximum allowable transmission power ( Pcmax ) of the terminal in the overlapping portion of the symbol for transmitting the SRS and the PUCCH / PUCCH on other cells when simultaneously transmitting (if the total Transmission power exceeds Pcmax on any overlapped portion of the symbol) SRS may be dropped in a subframe transmitting the SRS.

In the case of SRS + SRS, scaling is performed with the same scaling value to set the transmission power of the SRS so as to have the same UE behavior as before. As described above in the third embodiment, the terminal has multiple TAGs and is limited in power, that is, if the total transmission power exceeds the maximum allowable transmission power Pcmax on the terminal (if the total transmission power exceeds Pcmax on any overlapped) portion of the symbol) When SRS and SRS are simultaneously transmitted on different cells, scaling of the same transmit power value may be performed to set transmit power of the SRS.

4) UE in case of different TAG for different CCs and in case of not overlapping (or partially overlapping) and having no power limitation and simultaneously transmitting PUCCH or PUSCH and SRS The operation of may be defined as follows.

For the case of PUCCH + SRS, the UE may be configured to transmit SRS on the component carrier intended for SRS transmission together with PUCCH transmission.

In case of PUSCH + SRS, the UE may be configured to transmit the SRS on the component carrier intended to transmit the SRS together with the PUSCH transmission.

For the case of PUCCH + PUSCH + SRS, the UE is configured to transmit SRS on the component carrier intended to transmit SRS along with PUCCH and PUSCH transmission.

In the case of SRS + SRS, scaling is performed with the same scaling value to set the transmission power of the SRS so as to have the same UE behavior as before.

5 is a flowchart of an uplink power control method of a terminal according to the first embodiment. 6 is a conceptual diagram of an uplink power control method of a terminal according to the first embodiment.

Referring to FIG. 5, the uplink power control method 500 of the terminal according to the first embodiment includes a multi-TAG configuration step S510 and an uplink resource mapping step S520.

In step S510, the terminal from the base station may be composed of multiple timing advanced groups (TAG). The terminal may receive information on which multiple TAGs are configured, for example, TAG configuration information, from a transmission / reception point, and thus multiple TAGs may be configured. In this case, the TAG configuration information may be transmitted from the transmission / reception point to the terminal through downlink control information (for example, PDCCH) or higher layer signaling (for example, RRC message).

In step S520, when the UE simultaneously transmits a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) on the same cell, resources for the PUSCH in SC-FDMA symbols except for the last symbol of the subframe in which the SRS is transmitted Map elements.

In other words, as shown in FIG. 6, when the multiple TAGs TAG0 and TAG1 are configured, if the UE is configured to transmit SRS in the same subframe of the same cell as the cell transmitting the PUSCH, the last symbol of the PUSCH transmission is a rate. It can be matched (rate matching). In this case, as shown in FIG. 6A, an uplink data channel or a control channel and an SRS may be fully overlapped between different CCs or CC groups under multiple TAGs. In addition, as shown in FIG. 6B, an uplink data channel or a control channel and an SRS may be partially overlapped between different CCs or CCs under different TAGs.

In this case, the cell may be one element transport file. In addition, the SRS may be either periodic SRS or aperiodic SRS.

Specifically, the mapping of time and frequency resource elements (k, l) corresponding to the physical resource block (s) allocated for PUSCH transmission in the physical resource mapping of the PUSCH is possible SRS for the terminal-specific periodic SRS in the same serving cell SC-FDMA symbols for possible SRS transmission may not be used. In other words, regardless of whether the PUSCH includes UCI or not, the PUSCH may be configured to puncture the last symbol of the corresponding subframe to which the SRS is to be transmitted so as not to map a resource element for the PUSCH.

7 is a flowchart of an uplink power control method of a terminal according to the second embodiment. 8 is a conceptual diagram of a power control method of a terminal according to the second embodiment.

Referring to FIG. 7, the uplink power control method 700 of the terminal according to the second embodiment includes a multi-TAG configuration step S710 and an uplink power control step S720.

In step S710, the terminal from the base station may be composed of multiple timing advanced groups (TAG). The terminal may receive information on which multiple TAGs are configured, for example, TAG configuration information, from a transmission and reception point, and thus multiple TAGs may be configured. In this case, the TAG configuration information may be transmitted from the transmission / reception point to the terminal through downlink control information (for example, PDCCH) or higher layer signaling (for example, RRC message).

Next, in step S720, the UE simultaneously transmits the SRS and the PUCCH / PUCCH on other cells when simultaneously transmitting a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) on other cells. If the total transmit power in the overlapping part of the symbol transmitted exceeds the maximum allowed transmit power (P _CMAX) of the terminal (if the total transmission power exceeds P _CMAX on any overlapped portion of the symbol) SRS in a subframe for transmitting the SRS You can drop it. In this case, the other cells may be two or more other component carriers. In addition, the SRS may be either periodic SRS or aperiodic SRS.

In other words, if the SRS transmission of the UE in a symbol on a subframe for a given serving cell that is one TAG overlaps the PUCCH / PUSCH transmission on a subframe for another serving cell that is the same or different TAG, the total transmission in the overlapping portion of the symbol When the power exceeds P _CMAX , the UE may drop the SRS.

Specifically, as shown in (a) of FIG. 8, when the UE is the same TAG (TAG0) for different CCs (CCO, CC1), power limitation when simultaneously transmitting SRS and PUSCH / PUCCH on different cells. If there is no multiple TAGs are set to transmit the SRS, if there is a power limit can drop the SRS. Meanwhile, as shown in FIGS. 8B and 8C, even when different TAGs TAG0 and TAG1 for different CCs CCO and CC1 are fully overlapped, the UE is fully overlapped. Similarly, when there is no power limitation when simultaneously transmitting SRS and PUSCH / PUCCH on different cells, SRS may be transmitted if multiple TAGs are configured, and SRS may be dropped when there is power limitation. On the other hand, as shown in (d) of FIG. 8, even if the different TAG (TAG0, TAG1) for the different CC (CC0, CC1) is partially overlapped (partially overlap), the UE is the same as the SRS on the other cells When there is no power limitation when simultaneous transmission of PUSCH / PUCCH, if multiple TAGs are configured, the SRS may be transmitted, and if there is a power limitation, the SRS may be dropped.

On the other hand, in the case of consisting of three or more cells, the SRS transmission of the UE in the symbol on the subframe for a given serving cell that is one TAG overlaps the SRS transmission on the subframe for the other serving cell and the sub for another serving cell If PUCCH / PUSCH transmissions overlap on a frame, the UE may drop the SRS when the total transmit power exceeds P _CMAX in the overlapping portion of the symbol. In other words, when three or more cells are configured, when the SRS + SRS + PUSCH / PUCCH is simultaneously transmitted on three or more component carriers in two or more TAGs, there is a power limitation when the corresponding symbols overlap or partially overlap. In this case, all SRSs can be dropped before performing other power scaling. In this case, if there is no power limitation, the SRS may be transmitted.

9 is a flowchart of an uplink power control method of a terminal according to the third embodiment. 10 is a conceptual diagram of an uplink power control method of a terminal according to the third embodiment.

9, an uplink power control method 900 of a terminal according to the third embodiment includes a TAG configuration step (S910) and an SRS transmission power setting step (S920).

In step S910, the terminal from the base station may be composed of multiple timing advanced groups (TAG). The terminal may receive information on which multiple TAGs are configured, for example, TAG configuration information, from a transmission and reception point, and thus multiple TAGs may be configured. In this case, the TAG configuration information may be transmitted from the transmission / reception point to the terminal through downlink control information (for example, PDCCH) or higher layer signaling (for example, RRC message).

Next, in step S920, the terminal has a power limitation, and when transmitting a SRS (Sounding Reference Signal) and the SRS simultaneously on the other cells may perform the same scaling of the transmission power value to set the transmission power of the SRS. In other words, as shown in Figs. 10A (when TAGs are identical), (b) (when TAGs partially overlap with different cases) and (c) (when TAGs fully overlap with others) In a symbol on a subframe for a given serving cell which is one TAG, the SRS transmission of the UE in the symbol is totally overlapped or partially (at least) with the SRS transmission on the subframe for another serving cell using different TAGs (TAG0, TAG1). In case of overlapping), if there is a power limitation, the UE may set the transmission power of the SRS by performing the same scaling during simultaneous transmission of SRS + SRS such that P cmax is not exceeded. In this case, if there is no power limitation, the terminal may transmit the SRS. In this case, the other cells may be two or more other component carriers. In addition, the SRS may be either periodic SRS or aperiodic SRS.

11 is a system flowchart of an uplink power control method according to another embodiment.

1 and 11, the first transmitting / receiving point 110 serving as a serving cell transmits TAG configuration information in which multiple TAGs (Timing Advanced Groups) can be configured under CoMP or Carrier Aggregation (CA) to the terminal 120. (S1110). The TAG configuration information may be transmitted from the first transmission / reception point 110 to the terminal 120 through downlink control information (eg PDCCH) or higher layer signaling (eg RRC message).

Next, the terminal 120 may receive the TAG configuration information and configure multiple TAGs (S1120). As described above, even if the transmission / reception point is configured with multiple TAGs to the UE, specific component carriers may have the same TAG under carrier aggregation. For example, when two UL carriers are configured, each CC may be configured to have the same TAG. For example, when three uplink component carriers are configured with three components, two component carriers may be configured with the same TAG and another component carrier may be configured with another TAG.

Next, as described above, the terminal 120 has power limitation in case of the same TAG for different component carriers or full overlap even with different TAGs, and simultaneous transmission of PUCCH or PUSCH and SRS. (2) In the case of the same TAG for different component carriers or in the case of full overlap even with different TAGs, there is no power limitation and is configured to transmit PUCCH or PUSCH and SRS simultaneously, 3) In case of different TAG for different CCs, when there is no full overlap (partially overlapped), when power is limited and configured to transmit PUCCH or PUSCH and SRS simultaneously (4) This is another TAG for CC and is not full overlapped (or partially overlapped), so there is no power limitation and simultaneous transmission of PUCCH or PUSCH and SRS If configured, resource mapping and power control operations of the uplink data channel, the uplink control channel, and the sounding reference signal according to each operation are performed (S1130).

For example, as described above with reference to FIGS. 5 and 6 in step S1130, the UE ends a subframe configured to transmit an SRS when simultaneously transmitting a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) on the same cell. Resource element for PUSCH is mapped to SC-FDMA symbols except symbols. In this regard, the first embodiment has been described in detail above.

As another example, in step S1130, as described above with reference to FIGS. 7 and 8, the terminal 120 uses a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) on other cells. In case of simultaneous transmission, if the total transmission power exceeds the maximum allowable transmission power ( P _CMAX ) of the UE in the overlapping part of the symbol transmitting the SRS and the PUCCH / PUCCH on other cells (if the total transmission power exceeds P _CMAX on any overlapped portion of the symbol) SRS may be dropped in a subframe transmitting the SRS. In this regard, the second embodiment has been described in detail above.

As another example, in step S1130, as described above with reference to FIGS. 9 and 10, the terminal 120 has power limitation and performs the same scaling when transmitting a SRS (Sounding Reference Signal) and SRS simultaneously on different cells. The transmission power of the SRS may be set. In this regard, the third embodiment has been described in detail above.

In addition, when the operation of the terminal is configured with two or more different component carriers that can be transmitted in the uplink, and the terminal is configured with multiple TAGs, is the situation of the terminal each has a power limitation? In defining the operation of each terminal depending on whether there is no situation 1) the same TAG for the same TAG for different CCs or even if the different TAG even if full overlap the operation method of the terminal first apply and add 2) In the case of different TAG for different CCs and not full overlap, the operation of the terminal can be applied.

This means that backward compatibility is first applied to different component carriers having the same TAG so that a specific channel and a signal are transmitted in the transmission of an uplink control channel or an uplink data channel and a sounding reference signal under the same TAG. It is to set the power control (or control) to the drop (dropping) for the method to ensure maximum transmission of the uplink data channel and sounding reference signal on the component carrier in additional TAG. May be considered.

This may be a method of preventing excessive power control on the uplink data channel, thereby preventing deterioration of the data transmission rate for the data channel during carrier aggregation. When satisfied, the frequency can be prevented from being dropped frequently, and when the specified conditions are satisfied, the excessive power control of the sounding reference signal is prevented, thereby ensuring the reliability of the sounding reference signal during carrier aggregation. It is possible to obtain the gain by the dependent scheduling or the beamforming by the channel reciprocity in the TDD.

Next, the terminal 120 multiplexes an uplink data channel, an uplink control channel, an uplink reference signal, for example, a sounding reference signal, to which the uplink power control method of the terminal is applied, and thus, the first transmission / reception point or the second. It may transmit to one of the transmission and reception points (S1140). In this case, the UE transmits at least one of an uplink data channel, an uplink control channel, an uplink reference signal, for example, a sounding reference signal to which the uplink power control method of the terminal is applied, to the first transmission / reception point. At least another one may be transmitted to the second transmission / reception point.

12 is a diagram illustrating a configuration of a transmission and reception point according to another embodiment.

Referring to FIG. 12, a transmission / reception point 1200 according to another embodiment includes a controller 1210, a transmitter 1220, and a receiver 1230.

The control unit 1210 multiplexes a transmission and multiplexing method for a control channel transmitted from the terminal to the uplink under the carrier aggregation required for carrying out the above-described invention, and an uplink control channel and a sounding reference signal. Controls the operation of the overall transmit and receive points according to the method.

The transmitter 1220 and the receiver 1230 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention. For example, the transmitter 1220 may transmit configuration information constituting multiple TAGs to the terminal. The receiver 1230 may receive at least one of an uplink data channel, an uplink control channel, an uplink reference signal, for example, a sounding reference signal to which the uplink power control method of the terminal is applied, from the terminal.

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

Referring to FIG. 13, a user terminal 1300 according to another embodiment includes a receiver 1310, a controller 1320, and a transmitter 1330.

The receiver 1310 receives downlink control information, data, and a message from a transmission / reception point through a corresponding channel. As described in the first embodiment, the reception unit 1310 receives configuration information constituting multiple TAGs from a transmission / reception point.

In addition, the control unit 1320 multiplexes the transmission and multiplexing method for the control channel transmitted from the terminal to the uplink under the carrier aggregation and the uplink control channel and the sounding reference signal to carry out the aforementioned invention. Control the overall operation of the terminal according to the method.

As described in the first embodiment, the controller 1320 may be configured not to map a resource element for a PUSCH to a last symbol of a subframe in which a PUSCH is transmitted when multiple TAGs are configured and SRS and PUSCH are simultaneously transmitted on the same cell. have. In addition, as described in the second embodiment, when the control unit 1320 is configured with multiple TAGs and simultaneously transmits a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) on different cells. If the total transmit power exceeds the maximum allowable transmit power (P _CMAX ) of the UE in an overlapping portion of a symbol transmitting SRS and PUCCH / PUCCH on other cells, the SRS may be dropped in a subframe transmitting the SRS. have. As described in the third embodiment, the controller 1320 is configured to not map resource elements for the PUSCH to the last symbol of the subframe in which the PUSCH is transmitted when multiple TAGs are configured and SRS and PUSCH are simultaneously transmitted on the same cell. Can be.

The transmitter 1330 transmits downlink control information, data, and a message to a transmission / reception point through a corresponding channel.

In the above-described embodiments, when multiple TAGs are configured in a terminal under carrier aggregation, uplink control channel, data channel, and sounding reference signal are transmitted on different component carriers, limitation of transmission power of the terminal And by defining the operation of the terminal in accordance with the non-limiting of the transmission power can solve the ambiguity of the terminal according to the configuration of the transmission of the channel and signal that the transmission and reception point requests the terminal to the transmission.

In the above-described embodiments, when multiple TAGs are configured in a terminal under carrier aggregation, uplink control channel and data channel and sounding reference signal are transmitted on different component carriers, the limitation of the transmission power of the terminal and the transmission power Although the operation of the terminal is defined according to the non-limiting, the multi-TAGs are configured to the terminal even under CoMP, and the transmission power of the terminal is limited when the uplink control channel, the data channel, and the sounding reference signal are transmitted on different CCs. And the operation of the terminal in the same manner as described above according to the non-limiting of the transmission power.

The contents related to the standard specification mentioned in the above-mentioned embodiments are omitted for the sake of brevity and constitute a part of this specification. Therefore, it is to be understood that the content of some of the contents related to the above standard is added to or included in the scope of the present invention.

Specifically, the following documents, which are attached below, form a part of this specification as part of already published documents. Therefore, it is to be understood that the content of the above standard content and portions of the standard documents are added to or contained in the scope of the present invention.

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 (12)

In the uplink power control method of the terminal,
Configuring multiple Timing Advanced Groups (TAGs); And
Uplinking of a terminal including setting not to map a resource element for a PUSCH to a last symbol of a subframe transmitting a PUSCH when simultaneously transmitting a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) on the same cell Link power control method. The method of claim 1,
The SRS is the uplink power control method of the terminal, characterized in that one of the periodic SRS or aperiodic SRS. In the uplink power control method of the terminal,
Configuring multiple Timing Advanced Groups (TAGs); And
In the overlapping part of a symbol transmitting the SRS and the PUCCH / PUCCH on other cells when simultaneously transmitting a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) on other cells If the total transmit power exceeds the maximum allowable transmit power (P _CMAX ) of the terminal uplink power control method of the terminal comprising the step of dropping the SRS in the subframe transmitting the SRS. The method of claim 3,
TAGs on the other cells are the same, or TAGs are different on the other cells, and the symbols for transmitting the SRS and the PUCCH / PUCCH overlap at least partially or at least partially. In the uplink power control method of the terminal,
Configuring multiple Timing Advanced Groups (TAGs); And
A method of uplink power control of a terminal including power limitation and setting transmission power of an SRS by performing the same scaling when simultaneously transmitting a SRS and a SRS on different cells. The method according to claim 3 or 5,
And the other cells are different component carriers. A receiver configured to receive configuration information constituting multiple TAGs; And
And a controller configured to not map resource elements for the PUSCH to the last symbol of the subframe in which the PUSCH is transmitted when the multiple TAGs are configured and simultaneously transmit SRS and PUSCH on the same cell. 8. The method of claim 7,
The SRS is a terminal, characterized in that one of the periodic SRS or aperiodic SRS. A receiver configured to receive configuration information constituting multiple TAGs; And
When the multiple TAGs are configured and simultaneously transmit a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) on other cells, the SRS and the PUCCH / PUCCH are transmitted on other cells. And a controller configured to drop the SRS in a subframe in which the SRS is transmitted when the total transmit power exceeds a maximum allowable transmit power (P _CMAX ) of the terminal in an overlapping portion of a symbol. 10. The method of claim 9,
TAGs are identical on the other cells, or TAGs are different on the other cells, and a symbol for transmitting the SRS and the PUCCH / PUCCH overlaps at least partially or at least partially. A receiver configured to receive configuration information constituting multiple TAGs; And
And a controller configured to set the transmission power of the SRS by performing the same scaling when the multiple TAGs are configured, have power limitation, and simultaneously transmit SRS and SRS on different cells. The method according to claim 9 or 11,
And the other cells are different component carriers.

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