KR20160037722A - Methods for controlling the transmission power of uplink channels and signals and Apparatuses thereof - Google Patents

Abstract

The present invention relates to a methods for multiplexing at least one of uplink channels and uplink signals by a terminal and controlling the transmission power of uplink channels and uplink signals and apparatuses therefor. More specifically, the present invention relates to methods for multiplexing and transmitting various uplink channels and uplink signals by a terminal and controlling the transmission power of various uplink channels and uplink signals under a dual connectivity environment which receives and transmits to different base stations and apparatuses therefor. Especially, regarding the methods for controlling transmission power of uplink channels by a terminal, the present invention includes a step of setting maximum transmission power of uplink for each of multiple cell groups that include one or more serving cells, and a step of allocating transmission power of uplink channels and uplink signals, based on at least one of the maximum transmission power of uplink, total sum of the transmission power of one or more uplink channels and uplink signals, which are transmitted from each of the multiple cell groups and total maximum transmission power of the terminal, wherein the uplink channel includes a physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH), and the uplink signal includes sounding reference signal (SRS).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a transmission power control method for an uplink channel and a signal,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for multiplexing an uplink channel and an uplink signal and controlling transmission power of an uplink channel and an uplink signal. More particularly, the present invention relates to a method in which a UE multiplexes and transmits uplink signals with various uplink channels in a dual connectivity environment transmitting and receiving signals to and from different base stations, And a method of controlling the same.

As communications systems evolved, consumers, such as businesses and individuals, used a wide variety of wireless terminals. In a mobile communication system such as LTE (Long Term Evolution) and LTE-Advanced of the current 3GPP series, a high-speed and large-capacity communication system capable of transmitting and receiving various data such as video and wireless data outside a voice- It is required to develop a technique capable of transmitting large-capacity data in accordance with the above-described method. It is possible to efficiently transmit data using a plurality of cells in a method for transmitting a large amount of data.

In such a situation, a technique of expanding a large number of small base stations having a relatively narrow coverage such as a small cell is discussed in order to transmit a large amount of data at a high speed and stably transmit and receive data in an environment in which a plurality of terminals are concentrated in a specific base station In fact.

Also, discussion is being made on dual connectivity for performing communication with a terminal using such a small cell and an existing macro cell. In this dual connectivity situation, a terminal can perform wireless communication with a plurality of base stations.

However, since the UE transmits an uplink channel and an uplink signal using a limited uplink transmission power, it is necessary to discuss how to multiplex and transmit the uplink signals with various uplink channels. Further, a discussion on how to distribute the limited terminal transmission power to a plurality of base stations constituting dual connectivity, or how to distribute transmission power between various uplink channels and uplink signals that can be simultaneously transmitted need. That is, since the problem of allocating the transmission power to each uplink channel and the uplink signal by the terminal and transmitting the uplink channel and the uplink signal can not be solved, the terminal can not uplink the uplink channel using the dual connectivity There is a problem that the link signal can not be transmitted and the base station can not correctly receive the uplink channel and the uplink signal.

The present invention conceived in the foregoing situation is to propose a method and an apparatus for multiplexing and transmitting a plurality of uplink channels and an uplink signal in a case where a UE transmits an uplink channel and an uplink signal in a dual connectivity situation.

In addition, the present invention proposes a specific method and apparatus for allocating transmission power between each uplink channel and a signal when a UE transmits a signal with a plurality of uplink channels in a dual connectivity situation. In particular, a method and apparatus for determining transmission power allocation priorities between uplink channels and uplink signals to transmit signals with a plurality of uplink channels in a transmission power limitation state of a mobile station are proposed.

According to another aspect of the present invention, there is provided a method for controlling uplink transmission power of a UE, the method comprising: setting uplink maximum transmit power for each of a plurality of cell groups including at least one serving cell; The transmission power of the uplink channel and the uplink signal is allocated based on at least one of the transmission power, the total transmission power of one or more uplink channels transmitted in each of the plurality of cell groups and the uplink signal, Wherein the uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal includes a SRS (Sounding Reference Signal).

According to another aspect of the present invention, there is provided a method for receiving an uplink channel and an uplink signal in a base station, the method comprising: configuring a dual connectivity in a terminal; and receiving an uplink channel and an uplink signal from the terminal, , The uplink channel and the uplink signal include at least one of an uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells, a total transmission power of an uplink channel and an uplink signal, A method in which the uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal includes a SRS (Sounding reference signal) .

In addition, the present invention provides a method for controlling uplink transmission power in a mobile station, the method comprising: setting an uplink maximum transmission power for each of a plurality of cell groups including at least one serving cell; Based on at least one of a total transmission power of at least one uplink channel transmitted in the uplink channel and a total transmission power of the uplink signal and a total maximum transmission power of the terminal, The uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal includes a SRS (Sounding Reference Signal). And a terminal device.

According to another aspect of the present invention, there is provided a base station for receiving an uplink channel and an uplink signal, the base station including a control unit for establishing dual connectivity to the terminal and a receiver for receiving an uplink channel and an uplink signal from the terminal, The link channel and the uplink signal are based on at least one of an uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells, a total transmission power of an uplink channel and an uplink signal, The uplink channel includes a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH), and the uplink signal includes a base station apparatus including an SRS (sounding reference signal) to provide.

As described above, the present invention provides a method and an apparatus for multiplexing and transmitting a plurality of uplink channels and an uplink signal in transmitting a uplink channel and an uplink signal in a dual connectivity situation .

The present invention also provides a concrete method and apparatus for allocating transmission power between uplink signals and uplink signals in a case where a UE transmits a plurality of uplink and uplink signals in a dual connectivity situation . In particular, there is provided an apparatus and method for determining a transmission power allocation priority order between uplink channels and an uplink signal for transmitting a plurality of uplink channels and an uplink signal in a transmission power limitation state of a terminal.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a small cell development according to an embodiment. Fig.
2 is a diagram showing a small cell deployment scenario.
3 to 6 are diagrams showing detailed scenarios in the small cell deployment.
Figure 7 is a diagram showing various scenarios of carrier merging.
FIG. 8 is a diagram illustrating an example of a dual connectivity scenario to which the present invention can be applied.
9 is a diagram showing an example of a dual connectivity structure.
10 is a diagram showing another example of the dual connectivity structure.
11 to 21 are diagrams for explaining respective embodiments of a method for transmitting an uplink channel and an uplink signal or a channel according to the present invention.
22 is a diagram illustrating an example in which the uplink maximum transmit power of each cell group of the present invention is determined.
23 is a view for explaining operations of a terminal according to an embodiment of the present invention.
24 is a view for explaining the operation of a base station according to another embodiment of the present invention.
25 is a diagram illustrating a configuration of a terminal according to another embodiment of the present invention.
26 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 numerals even though 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.

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), and a small cell.

That is, in the present specification, a base station or a cell has 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, RU, and small cell 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) the device itself providing a megacell, macrocell, microcell, picocell, femtocell, small cell in relation to the wireless region, or ii) indicating 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 exemplary 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 base station, collectively referred to as a megacell, macrocell, microcell, picocell, femtocell, small cell, RRH, antenna, RU, low power node do.

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 a system such as LTE and LTE-A, the uplink and downlink are configured based on one carrier or carrier pair to form a standard. The uplink and the downlink are divided into a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel, a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control Channel (EPDCCH) Transmits control information through the same control channel, and is configured with data channels such as PDSCH (Physical Downlink Shared CHannel) and PUSCH (Physical Uplink Shared CHannel), and transmits data.

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, EPDCCH, and PDSCH is expressed as 'PUCCH, PUSCH, PDCCH, EPDCCH and PDSCH are transmitted and received'.

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

That is, the physical downlink control channel described below may mean a PDCCH, an EPDCCH, or a PDCCH and an EPDCCH.

Also, for convenience of description, EPDCCH, which is an embodiment of the present invention, may be applied to the portion described with PDCCH, and EPDCCH may be applied to the portion described with EPDCCH according to an embodiment of the present invention.

Meanwhile, the High Layer Signaling described below includes RRC signaling for transmitting RRC information including RRC parameters.

The eNB performs downlink transmission to the UEs. 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 a PDSCH, 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.

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 frequencies F1 and F2 used in the various small cell scenarios of FIGS. 1 and 2 to 6 described above may be frequencies that support the same duplex mode, or F1 and F2 may have different duplex modes , For example, F1 may be considered to support FDD mode, F2 may be considered to support TDD mode, or vice versa.

Figure 7 is a diagram showing various scenarios of carrier merging.

As shown in FIG. 7, the F1 and F2 may be frequencies that support the same duplex mode under a carrier merging scenario, or F1 and F2 may support frequencies that support different duplex modes.

710, the F1 and F2 cells are co-located and overlaid under almost the same coverage. The two layers are scenarios that provide sufficient coverage and mobility, and can be aggregated between overlapping F1 and F2 cells.

720 is a scenario where F1 and F2 cells are co-located and overlaid, but coverage of F2 is smaller than F1. F1 has sufficient coverage, mobility support is based on F1 coverage, F2 is a scenario used to improve throughput, and it is possible to merge overlapping F1 and F2 cells.

730 is a scenario where F1 and F2 cells are co-located, while F2 antennas are directed to cell boundaries to increase cell edge throughput. Mobility support is performed based on F1 coverage, F1 has sufficient coverage, F2 is a scenario with provisional coverage holes, and F1 and F2 cells in the same eNB can be merged where coverage is overlapped. This is a scenario.

Scenario 740 is a scenario in which F1 has macro coverage and RRH in F2 is used to improve throughput in a hot spot region. The mobility support is based on F1 coverage and is combined with the F1 macrocell F2 RRHs is a scenario where cells can be merged.

750 is a scenario similar to the scenario of 720 in which frequency selective repeaters are deployed for coverage expansion of one carrier. It is a scenario where F1 and F2 cells in the same eNB can be merged where coverage is overlapped.

As an example of the uplink channel, a physical uplink control channel (PUCCH) used as an uplink control channel will be briefly described. The PUCCH is divided into formats according to the types of information transmitted from the terminals. The following is a description of the format of the PUCCH and its use.

- PUCCH format 1: Channel format for transmitting only scheduling request

PUCCH format 1a / 1b is a channel for transmitting a scheduling request and / or acknowledgment information (for example, Ack / Nack) for a downlink data channel, the number of bits of Ack / Nack and the modulation scheme modulation scheme according to the format 1a / 1b.

- Shortened PUCCH format 1a / 1b: A format in which the last SC-FDMA symbol of one subframe is punctured in PUCCH format 1a / 1b transmitting Ack / Nack. Whether or not the corresponding format is used is determined by the RRC parameter according to an instruction of the upper layer of the base station, whether ackNackSRS-SimultaneousTransmission is TRUE / FALSE and cell specific information configuration of SRS (Sounding Reference signal).

- PUCCH format 2: Channel format for transmitting only CQI (Channel Quality Indication).

- PUCCH format 2a / 2b: channel for transmitting ack / nack for CQI + downlink data channel, divided into 2a or 2b according to the number of bits and a modulation scheme of ack / nack.

- PUCCH format 3: A channel for transmitting ack / nack of 4 bits or more under downlink carrier aggregation.

- Shortened PUCCH format 3: In the PUCCH format 3 transmitting Ack / Nack, the last SC-FDMA symbol of one subframe is a punctured format. Whether or not the corresponding format is used is determined by the RRC parameter according to an instruction of the upper layer of the base station, whether the ackNackSRS-SimultaneousTransmission is TRUE / FALSE, and the cell specific information configuration of the SRS.

Hereinafter, a method for controlling UE transmission power of an uplink channel and an uplink signal under carrier aggregation when a PUCCH is transmitted in one serving cell without considering multiple PUCCHs will be described. Specifically, as a method for power control between uplink transmission channels, between an uplink channel and sounding reference signals, and between sounding reference signals, there are a power limited case of the UE, A portion of the non-power limited case relating to the present invention will be briefly described.

를 넘는 경우에, 단말은 서빙 셀 c를 위한 PUSCH의 전송 전력을 결정함에 있어서 PUCCH의 전송 전력를 우선시 하도록 설정한다. 단말은 PUCCH 전송전력을 할당한 후 나머지 전송 전력에 대해서 PUSCH의 전송 전력을 0과 1사이의 값으로 스케일링(scaling)하여 해당 PUSCH의 전송 전력을 결정한다. 즉, 단말은 수학식 1을 사용하여 해당 PUSCH의 전송전력을 결정한다.
- If the sum of the total transmission power of the terminal for the terminal with simultaneous transmission of PUCCH and PUSCH is configured

, The UE sets the transmission power of the PUCCH to be priority in determining the transmission power of the PUSCH for the serving cell c. After allocating the PUCCH transmission power, the UE scales the transmission power of the PUSCH to a value between 0 and 1 with respect to the remaining transmission power, and determines the transmission power of the corresponding PUSCH. That is, the UE determines the transmission power of the corresponding PUSCH using Equation (1).

는

의 리니어 값(linear value)이고, 는

의 리니어 값(linear value)이고,

는 서브프레임 i에서의 단말에 구성된 전체 최대 출력 파워인

의 리니어 값(linear value)이다.

는 서빙 셀 c를 위한

의 스케일링 팩터이고, 0에서 1 사이의 값을 갖는다.

The

Lt; / RTI > is a linear value of < RTI ID = The

Lt; / RTI > is a linear value of < RTI ID =

Is the total maximum output power of the terminal in the subframe i

Is a linear value.

Lt; RTI ID = 0.0 >

, And has a value between 0 and 1.

를 넘는 경우, 단말에서 서로 다른 캐리어 혹은 서로 다른 서빙 셀에서 전송되는 PUSCH들 간의 전송 전력을 결정함에 있어서는 해당 PUSCH가 포함하는 정보가 UCI(uplink control information)를 포함하고 있느냐의 여부에 따라 결정된다. 구체적으로, UCI를 가지는 PUSCH를 전송하는 서빙 셀 혹은 요소 캐리어를 우선하여 PUSCH 전송 전력을 할당하도록 하고, 나머지 서빙 셀(들) 혹은 요소 캐리어들 간에 동일한 스케일링 팩터를 가지고 스케일링을 수행하여 PUSCH 전송 전력을 결정하게 된다. 여기서, 특정 서빙 셀(들) 혹은 요소 캐리어에 대해서 스케일링 팩터를 0으로 설정할 수도 있다. 즉, 단말은 수학식 2를 사용하여 해당 PUSCH의 전송전력을 결정한다.- If the total transmission power of the terminal is

, The determination of the transmission power between PUSCHs transmitted from different carriers or different serving cells in the UE depends on whether or not the information included in the PUSCH includes uplink control information (UCI). Specifically, the PUSCH transmission power is allocated in preference to the serving cell or the elementary carrier that transmits the PUSCH having the UCI, and the scaling is performed with the same scaling factor between the remaining serving cell (s) or the element carriers, . Here, the scaling factor may be set to 0 for a particular serving cell (s) or an elementary carrier. That is, the UE determines the transmission power of the corresponding PUSCH using Equation (2).

를 초과하면, 단말은 수학식 2를 참조하여 전송전력을 할당할 수 있다.

는 UCI를 포함하는 셀을 위한 PUSCH 전송전력이고,

는 UCI를 포함하지 않는 서빙 셀 c를 위한

의 스케일링 팩터이다. If the UE transmits a PUSCH including the UCI in the serving cell j and a PUSCH not including the UCI in the remaining serving cell (s), and the sum of the transmission powers for transmitting the PUSCHs is the total transmission power of the UE

, The terminal can allocate transmission power with reference to Equation (2).

Is the PUSCH transmit power for the cell containing the UCI,

For a serving cell < RTI ID = 0.0 > c < / RTI &

Lt; / RTI >

를 넘는 경우, 단말에서 서로 다른 캐리어 혹은 서로 다른 서빙 셀에서 전송되는 PUCCH+PUSCH with UCI와 UCI가 없는 PUSCH들 간의 전송 전력을 결정함에 있어서는, 가장 우선순위로 PUCCH의 전송 전력을 보장하도록 하고, 다음으로 UCI를 가지는 PUSCH의 전송 전력을 보장하도록 설정하며, 단말의 나머지 전송 전력에 대해서 나머지 서빙 셀(들) 혹은 요소 캐리어들 간에 동일한 스케일링 팩터를 가지고 스케일링을 수행하여 PUSCH 전송 전력을 결정하게 된다. 여기서 특정 서빙 셀(들) 혹은 요소 캐리어에 대해서 스케일링 팩터를 0으로 설정할 수도 있다. 즉, 단말은 수학식 3을 사용하여 해당 PUSCH의 전송전력을 결정한다.- If the total transmission power of the terminal is

, In determining the transmission power between the PUCCH + PUSCH with UCI and the UCI-free PUSCH transmitted from different carriers or different serving cells, the transmission power of the PUCCH is guaranteed to be the highest priority, And the PUSCH transmission power is determined by performing scaling with the same scaling factor between the remaining serving cell (s) or the remaining number of the elementary carriers with respect to the remaining transmission power of the UE. Where the scaling factor may be set to zero for a particular serving cell (s) or element carrier. That is, the UE determines the transmission power of the corresponding PUSCH using Equation (3).

and

를 넘는 경우에는 단말에서 서로 다른 캐리어 혹은 서로 다른 서빙 셀에서 전송되는 SRS들 간의 전송 전력을 결정함에 있어서는 서빙 셀(들) 혹은 요소 캐리어들 간에 동일한 스케일링 팩터를 가지고 스케일링을 수행하여 SRS의 전송 전력을 결정하게 된다. 즉, 단말은 수학식 4를 사용하여 해당 SRS들의 전송전력을 결정한다.- If the total transmission power of the terminal is

, In determining the transmission power between the SRSs transmitted from different carriers or different serving cells in the UE, scaling is performed with the same scaling factor between the serving cell (s) or the element carriers, so that the transmission power of the SRS . That is, the UE determines the transmission power of corresponding SRSs using Equation (4).

는

의 리니어 값이고,

는 서브프레임 i에서의 단말에 구성된 전체 최대 출력 파워인

의 리니어 값(linear value)이다.

는 서빙 셀 c를 위한

의 스케일링 팩터이고, 0에서 1 사이의 값을 갖는다.
In Equation 4,

The

Lt; / RTI >

Is the total maximum output power of the terminal in the subframe i

Is a linear value.

Lt; RTI ID = 0.0 >

, And has a value between 0 and 1.

Dual  Connectivity ( Dual Connectivity )

FIG. 8 is a diagram illustrating an example of a dual connectivity scenario to which the present invention can be applied.

The scenario of FIG. 8 relates to inter-node radio resource aggregation for improving the terminal transmission rate from different nodes under dual connectivity, and it is possible to use one or more base stations for user plane data transmission Lt; RTI ID = 0.0 > wireless < / RTI >

Dual connectivity represents an operation in which an RRC_CONNECTED terminal uses radio resources provided by at least two different network points (e. G., Master eNB and Secondary eNBs) connected by a non-ideal backhaul. In a dual connectivity, a master eNB refers to a base station that terminates the S1-MME and acts as a mobility anchor toward a core network (CN). The Master eNB may be referred to as a master base station or a MeNB or a Macro eNB or a macrocell eNB. In the dual connectivity, the secondary eNB is a base station that provides additional radio resources for the UE, not a master eNB. The secondary eNB may be referred to as a secondary base station or an SeNB or a small cell eNB or a Small eNB or an assisting eNB. At this time, the group of serving cells associated with MeNB is referred to as MCG (Master Cell Group), and the group of serving cells associated with SeNB is referred to as SCG (Secondary Cell Group). Here, the associated serving cells may refer to a serving cell provided by the corresponding base station.

SeNB has at least one special cell containing a PUCCH. That is, at least one serving cell associated with SeNB has a configured uplink. And one of them is configured with a PUCCH resource (at least one cell in SeNB has been configured for UL and one of them is configured with PUCCH resources).

9 is a diagram showing an example of a dual connectivity structure.

9 shows an example of a dual connectivity structure using radio resources provided by two base stations connected by a non-ideal backhaul. When dual connectivity is configured in the UE with the structure shown in FIG. 9, the UE can configure a specific data radio bearer as a dedicated BS bearer. For example, the UE may configure a specific radio bearer for voice service as a MeNB dedicated data radio bearer (MCG radio bearer), and a specific radio bearer for Internet service as a SeNB dedicated data radio bearer (SCG radio bearer) Can be configured. For a specific MCG data radio bearer or a specific SCG radio bearer, only one base station has a PDCP entity, an RLC entity, and a MAC entity. The terminal has an entity in the terminal peered to the entity.

10 is a diagram showing another example of the dual connectivity structure.

10 shows another example of a dual connectivity structure using radio resources provided by two base stations connected by a non-ideal backhaul. When dual connectivity is configured in the UE with the structure shown in FIG. 10, the UE can configure a specific data radio bearer (Split) through two base stations (MeNB and SeNB). Hereinafter, the bearer separated by two base stations is referred to as a separate radio bearer (MCG-SCG radio bearer) or a split bearer. For a specific separated data radio bearer, each base station has independent RLC entity (MeNB is MeNB RLC entity, SeNB is SeNB RLC entity) and MAC entity (MeNB is MeNB MAC entity and SeNB is SeNB MAC entity). The terminal has an entity in the terminal peered to the entity.

In this specification, when the UE configures the dual connectivity, the UE establishes an RRC connection with the UE, terminates the base station or the S1-MME that provides the handover-based cell (for example, Pcell) a base station serving as a mobility anchor is described as a master base station (MeNB) or a first base station as needed.

The master base station or the first base station may be a base station providing macro cells and the base station providing any small cell in a dual connectivity situation between small cells.

On the other hand, a base station which is distinguished from the master base station in the dual connectivity environment and provides additional radio resources to the terminal is described as a secondary base station or a second base station as needed.

The first base station (master base station) and the second base station (secondary base station) may each provide at least one cell to the terminal, and the first base station and the second base station may be connected through the interface between the first base station and the second base station. have.

In addition, for ease of understanding, a cell associated with a first base station may be referred to as a macro cell, and a cell associated with a second base station may be referred to as a small cell. However, in the small cell cluster scenario described below, the cell associated with the first base station may also be described as a small cell.

The macrocell in the present invention may mean at least one or more cells and may be written in the meaning of representing the entire cell associated with the first base station. Also, a small cell may mean at least one or more cells, and may be written in the meaning of representing the entire cell associated with the second base station. However, in a specific scenario, such as a small cell cluster as described above, it may be a cell associated with the first base station, in which case the cell of the second base station may be described as another small cell or another small cell.

However, in the following description of the embodiment, for convenience of description, it is possible to associate a macro cell with a master base station or a first base station, and associate a small cell with a secondary base station or a second base station, but the present invention is not limited thereto, The present invention is also applicable to a situation where a base station or a second base station can be associated with a macro cell and a master base station or a first base station is associated with a small cell.

In addition, the uplink channel and the uplink signal in the present specification may refer to all channels or signals transmitted from the terminal to the base station. For example, the uplink channel should be interpreted to mean a channel including a PUCCH and a PUSCH, which the UE transmits to the BS. Also, the uplink signal should be interpreted to mean a signal including a signal transmitted from the terminal to the base station like the SRS. In addition, the uplink channel and the uplink signal are various channels or signals transmitted from the terminal to the base station. The PUCCH and PUSCH described above are described as an uplink channel and the SRS is described as an uplink signal as necessary. Alternatively, PUCCH, PUSCH, and SRS may be described as an uplink signal if necessary.

When the UE simultaneously transmits the uplink data, the control channel, and the uplink signal to the base station under the carrier aggregation in the non-dual connectivity, the PUCCH transmission in one serving cell, that is, the primary serving cell (PCell) And does not consider the transmission of PUCCH in the serving cell other than the PCcell. In addition, only a case where multiple cells or element carriers are configured under a single base station is considered, and different base stations may be configured to configure multiple cells or element carriers, and each base station or each cell group Lt; RTI ID = 0.0 > PUCCH < / RTI > Therefore, when the PUCCH is transmitted in the PCN of MeNB as in the dual connectivity environment, and the PUCCH is transmitted in the serving cell that performs PUCCH transmission in another serving cell and part of the PCell function of another SeNB, It is necessary to newly define and apply a multiplexing method or a power control method between a channel or an uplink signal. That is, since ambiguity occurs in transmitting the uplink data, the control channel, and the uplink signal to the base station, the base station and the terminal can not know how the operation of the terminal is performed. Therefore, when multiple PUCCHs are configured, a multiplexing method and power control methods related to combinations of uplink channels (PUCCH, PUSCH, PRACH) and uplink signals (SRS) transmitted by the UE need to be newly defined.

In addition, under dual connectivity, the UE can individually transmit or combine PUCCH / PUSCH / SRS to different base stations or different cell groups. Meanwhile, when transmission to different base stations or different cell groups is considered in a situation where the total maximum transmission power of the UEs that can be transmitted by the UE is limited, the PUCCH, which is transmitted to different base stations or different cell groups, The multiplexing and power control methods for individual transmissions of / PUSCH / SRS and their combined transmissions need to be redefined.

In this context, the present invention is based on the assumption that when a PUCCH transmission in a serving cell other than a PCcell is considered under a small cell environment (i.e., transmission is performed to different base stations MeNB (Master eNB) and SeNB (Secondary eNB) In a case where the UE is configured to transmit an uplink channel or a signal to a different base station in a case where a dual connectivity is configured to allow receipt from the SeNB), in a serving cell under the same base station or between serving cells A method of multiplexing uplink channels or signals is proposed. The present invention also provides a method and apparatus for controlling transmission power of a terminal. When a cell for transmitting a PUCCH is configured in a PCcell for transmitting a PUCCH and a secondary cell group (SCG) in a master cell group (MCG), an uplink channel (PUCCH, PUSCH, , PRACH) and uplink signals (SRS), and a power control method and apparatus therefor.

Also, considering PUCCH / PUSCH / SRS individual transmission or combination transmission to different base stations or different cell groups under dual connectivity, the uplink PUCCH / PUSCH / SRS transmitted from the UE to different base stations or different cell groups To a multiplexing method and a transmission power control method and apparatus for performing transmission power control under limited maximum total transmission power for individual transmission or combined transmission.

Hereinafter, the multiplexing method and the transmission power control method for transmitting the uplink channel and the uplink signals in the dual connectivity will be described in detail with reference to the respective embodiments. That is, the present invention proposes a multiplexing method for uplink channel signals in a case where a terminal having different cell groups, a terminal having dual connectivity, or a multiple PUCCH configuration is set in the terminal.

As described above, the UE can independently determine the uplink maximum transmission power in each cell group. Also, the transmission power of the uplink channel and the uplink signals can be determined based on the uplink maximum transmission power determined in each cell group.

When the transmission power of the uplink channel and the uplink signals is independently applied in each cell group as described with reference to Equations 1 to 4, when a UE having dual connectivity is configured to have different types of cell groups (for example, MCG , SCG) or different base stations (for example, MeNB, SeNB), and RRC parameters can be independently provided as a method for supporting multiplexing between an uplink channel and an uplink signal. That is, a method may be considered in which the RRC parameters can be independently set in each cell group for the following four parameters, which can inform the RRC parameters of items that need to be supported by the operation of the UE .

Method 1: ackNackSRS-SimultaneousTransmission, which is an RRC parameter that can indicate simultaneous transmission of SRS and PUCCH format that can transmit Ack / Nack through PUCCH format 1 / 1a / 1b and PUCCH format 3, How to set it up independently.

For example, Rck parameters such as ackNackSRS-SimultaneousTransmission for the master cell group and ackNackSRS-SimultaneousTransmission for the secondary cell group are set so that the RRC parameters for concurrent transmission of Ack / Nack and SRS are present for each cell group. Or ackNackSRS-SimultaneousTransmission for the master base station and the ackNackSRS-SimultaneousTransmission for the secondary base station, RRC parameters indicating simultaneous transmission of Ack / Nack and SRS are respectively present for each base station constituting each cell group .

Since the PUCCH can be transmitted in one cell per each cell group, when it is set to perform simultaneous transmission of Ack / Nack and SRS in each cell group, the PUCCH and the SRC can be transmitted using the mechanism described with reference to Equations (1) SRS multiplexing is performed. For example, one cell that can transmit a PUCCH per cell group described above may be a PCell in the MCG, and a special SCell (or special PCell or sPCell or PSCell) in the SCG.

As another example, under dual connectivity, the UE may be configured not to allow simultaneous transmission of PUCCH and SRS in the SCG. In this case, ackNackSRS-SimultaneousTransmission for that SCG or SeNB may not be needed. In this case, however, the simultaneous transmission operation of PUCCH and SRS for transmitting ack / Nack according to the setting of ackNackSRS-SimultaneousTransmission should be applied only to MCG or MeNB. Therefore, for the terminals constituting the dual connectivity, the corresponding RRC parameter ackNackSRS-SimultaneousTransmission may need to be changed to ackNackSRS-SimultaneousTransmission for MCG or ackNackSRS-SimultaneousTransmission for MeNB. Or the same parameter may be used as it is. In this case, the base station may instruct the terminal to set ackNackSRS-SimultaneousTransmission, which is an existing RRC parameter, to be used only for MeNB or MCG for a terminal having dual connectivity.

Method 2: A method of independently setting the simultaneousAckNackAndCQI, which is an RRC parameter instructing simultaneous transmission of ack / Nack and CQI through PUCCH 2 / 2a / 2b, to each cell group.

For example, it is possible to set the RRC parameters for simultaneous transmission of Ack / Nack and CQI for each cell group using simultaneousAckNackAndCQI for the master cell group and simultaneousAckNackAndCQI for the secondary cell group. Alternatively, it is possible to set the RRC parameters indicating simultaneous transmission of Ack / Nack and CQI for each base station constituting the cell group by using a method such as simultaneousAckNackAndCQI for the master base station and simultaneousAckNackAndCQI for the secondary base station.

Since the PUCCH can be transmitted in one cell per each cell group, when the Ack / Nack and the CQI can be simultaneously transmitted in each cell group, the Ack / It is a way to set up multiplexing of Nack and CQI. For example, one cell that can transmit a PUCCH per cell group described above may be a PCell in the MCG, and a special SCell (or special PCell or sPCell or PSCell) in the SCG.

As another example, it is possible to set the SCG to not allow simultaneous transmission of ack / Nack and CQI on the PUCCH to the UE under dual connectivity. In this case, ack / Nack on the PUCCH for the SCG and simultaneousAckNackAndCQI for SCG (or SeNB) for simultaneous transmission of the CQI may not be needed. However, in this case, it is also necessary to apply a simultaneous transmission of ACK / NACK and CQI on the PUCCH according to the setting of simultaneousAckNackAndCQI only to MCG or MeNB. Therefore, it is necessary to change the RRC parameter of simultaneousAckNackAndCQI for MCG or simultaneousAckNackAndCQI for MeNB for the terminals constituting the dual connectivity. Alternatively, when the same parameters are used as they are, the base station can instruct the terminal to set the existing RRC parameter, simultaneousAckNackAndCQI, to be used only for the MeNB or MCG for the UE having the dual connectivity.

Method 3: A method for independently setting RRC parameters, simultaneousAckNackAndCQI-Format3-r11, which instructs to simultaneously transmit ack / Nack and CQI through PUCCH Format 3, for each cell group.

For example, it is possible to set the RRC parameters for simultaneous transmission of Ack / Nack and CQI for each cell group using simultaneousAckNackAndCQI-Format3 for the master cell group and simultaneousAckNackAndCQI-Format3 for the secondary cell group . Or simultaneousAckNackAndCQI-Format3 for the master base station and simultaneousAckNackAndCQI-Format3 for the secondary base station, RRC parameters for simultaneously transmitting Ack / Nack and CQI for each base station constituting each cell group can be set to exist have.

Since the PUCCH can be transmitted in one cell per each cell group, when the Ack / Nack and the CQI can be simultaneously transmitted in each cell group, the Ack / It is a way to set up multiplexing of Nack and CQI. For example, one cell that can transmit a PUCCH per cell group described above may be a PCell in the MCG, and a special SCell (or special PCell or sPCell or PSCell) in the SCG.

As another example, it is possible to set the SCG to not allow simultaneous transmission of ack / Nack and CQI on the PUCCH to the UE under dual connectivity. In this case, ack / Nack on the PUCCH for the SCG and simultaneousAckNackAndCQI-Format3 for SCG (or SeNB) for simultaneous transmission of the CQI may not be needed. In this case, however, it is necessary to apply the operation of simultaneously transmitting ack / Nack and CQI on PUCCH according to the setting of simultaneousAckNackAndCQI-Format3 only to MCG or MeNB. Therefore, for the terminals constituting the dual connectivity, it is necessary to change the RRC parameters of simultaneousAckNackAndCQI-Format3-r11 to simultaneousAckNackAndCQI-Format3 for MCG or simultaneousAckNackAndCQI-Format3 for MeNB. Alternatively, if the same parameters are used as they are, the base station may instruct the terminal to set the existing RRC parameter, simultaneousAckNackAndCQI-Format3-r11, to be used only for the MeNB or MCG for the UE having the dual connectivity.

Method 4: The simultaneous transmission of the PUCCH and the PUSCH is enabled, and the simultaneous PUCCH-PUSCH of the RRC parameter is independently set for each cell group.

For example, it is possible to set the RRC parameters for simultaneous transmission of PUCCH and PUSCH for each cell group using simultaneous PUCCH-PUSCH for the master cell group and simultaneous PUCCH-PUSCH for the secondary cell group. Alternatively, RRC parameters indicating simultaneous transmission of PUCCH and PUSCH may be set for each base station constituting each cell group by using a method such as simultaneous PUCCH-PUSCH for the master base station and simultaneous PUCCH-PUSCH for the secondary base station.

Since the PUCCH can be transmitted in one cell for each cell group, when the PUCCH and the PUSCH can be simultaneously transmitted in each cell group, the PUCCH and the PUSCH can be simultaneously transmitted using the mechanism described with reference to Equations (1) And a piggyback mechanism to the PUSCH for multiplexing and UCI to be transmitted on the PUCCH so that backward compatibility can be satisfied. One cell that can transmit a PUCCH per cell group described above may be a PCell in the MCG and a special SCell (or special PCell or sPCell or PSCell) in the SCG.

As another example, it is possible to set the SCG to not allow simultaneous transmission of PUCCH and PUSCH to the UE under dual connectivity. In this case, you may not need a simultaneous PUCCH-PUSCH for that SCG or for SeNB. In this case, however, simultaneous transmission of PUCCH and PUSCH according to the setting of simultaneous PUCCH-PUSCH should be applied to only MCG or MeNB. Therefore, for the terminals constituting the dual connectivity, the corresponding RRC parameter, simultaneousPUCCH-PUSCH, may need to be changed to simultaneous PUCCH-PUSCH for MCG or simultaneousPUCCH-PUSCH for MeNB. Or the same parameter may be used as it is. In this case, the base station may instruct the terminal to set the existing RRC parameter, i.e., simultaneousPUCCH-PUSCH to be used only for the MeNB or MCG for the UE having the dual connectivity.

In the above description, a method of multiplexing between uplink channels or between an uplink channel and an uplink signal using independent RRC parameters for each cell group has been described.

Hereinafter, a transmission power control operation for the uplink channel and the uplink signals in a case where a terminal having different cell groups, a terminal having dual connectivity, or a multiple PUCCH configuration is set in the terminal will be described.

For example, the UE can set uplink maximum transmission power for each cell group. That is, the uplink maximum transmit power can be set to P_cmax and MCG for the master cell group, and the uplink maximum transmit power can be set to P_cmax and SCG for the secondary cell group. The set P_cmax, MCG, P_cmax, and SCG can satisfy any one of the following conditions.

One)

2) P_cmax> = P_cmax, MCG, P_cmax> = P_cmax, SCG, P_cmax <= P_cmax, MCG + P_cmax, SCG

The present invention can be applied to the above 1) and 2) conditions, respectively, and 1) conditions will be described in order to facilitate understanding. It goes without saying that the present invention can be similarly applied to the case of 2) conditions.

As described above, in determining the uplink transmission power, the UE according to the present invention can independently determine the uplink transmission power in each cell group using the uplink maximum transmission power set for each cell group. That is, the UE applies P_cmax to P_cmax and MCG for PUCCH / PUSCH / PRACH and SRS transmission of serving cells belonging to the MCG, and P_cmax for the PUCCH / PUSCH / PRACH and SRS transmission of serving cells belonging to the SCG P_cmax, and SCG.

For example, the transmission power of the uplink channel and the uplink signal may be determined using the uplink maximum transmission power of each cell group. For reference, the transmission power of the uplink channel and the uplink signals can be applied by changing P _CMAX to P _{CMAX , CG} in section 5.1.1.1 of TS document 36.213 as shown in the following table.

(PUCCH / PUSCH / PRACH) and signal (SRS) in the case where a terminal having different cell groups, a terminal having dual connectivity, or a multiple PUCCH configuration is set in the terminal, P_cmax, CG , It is possible to maintain backward compatibility in performing transmission power control for each uplink channel and channel and combination thereof. Also, in order to use the power control related power scaling mechanism used when performing carrier merging in one base station, the power scaling is preferentially performed in the same cell group, and in the next step, (PUCCH / PUSCH / PRACH) and the transmission power of the signal SRS exceeds the maximum power P_cmax that can be transmitted by the mobile station.

11 to 21 are diagrams for explaining respective embodiments of a method for transmitting a uplink signal or a channel by a terminal according to the present invention.

11 to 21, in an embodiment of the present invention, the sum of the transmission powers of the uplink channels (PUCCH / PUSCH / PRACH) and the signal (SRS) transmitted together among different cell groups can be transmitted A method of performing power scaling for a case where the maximum transmission power P_cmax is exceeded will be described.

For example, the power according to the transmission of multiple PUCCH (s) / PUSCH / SRS (i.e. uplink channel / signal combination) transmitted from different cell groups by UEs having different cell groups In order to perform control or multiplexing, the following method can be applied.

When this method is applied, the following additional terminal operations are required for a combination of uplink channels and signals transmitted to each MCG and SCG.

- If the PUCCH is transmitted simultaneously to different cell groups and exceeds the maximum transmission power Pcmax that the terminal can transmit

on any overlapped portion.)
In the situation where a dual connectivity or a multiple PUCCH configuration is set in the UE as shown in FIG. 11, if the UE PUCCH transmission in the subframe i for the MCG serving cell is PUCCH transmission in the subframe i + 1 for the serving cell of the SCG, , The UE shall adjust so that no overlapping part exceeds the total maximum transmission power of the UE, P _CMAX . (If the UE is configured with [multiple PUCCH configuration or transmission] or [dual connectivity capability] transmission of the UE on subframe i for a given serving cell on the MCG overlaps some portion of the PUCCH transmission on the subframe i + 1 for a different serving cell on the secondary cell group (SCG) transmission power to not exceed

on any overlapped portion.

- When PUCCH / PUSCH is transmitted simultaneously to different cell groups, if the maximum transmission power Pcmax that can be transmitted by the terminal exceeds

on any overlapped portion.)
In the situation where a dual connectivity or multiple PUCCH configuration is set in the UE as shown in FIG. 12, if the UE PUCCH / PUSCH transmission in the subframe i of the MCG serving cell is PUCCH / PUSCH transmission in the subframe i + 1 of the serving cell of the SCG When some overlap is made, the UE must adjust so that no overlapping part does not exceed P _CMAX , which is the total maximum transmission power of the UE. (If the UE is configured with [multiple PUCCH configuration or transmission] or [ the PUCCH / PUSCH transmission on the subframe i for a given serving cell on the MCG overlaps some portion of the PUCCH / PUSCH transmission on the subframe i + 1 for a different serving cell on the secondary cell group (SCG) the UE shall adjust its total transmission power to not exceed

on any overlapped portion.

- PUCCH under different cell group configurations on MCG is transmitted and PUSCH on When the SCG is simultaneously transmitted, if the maximum transmission power Pcmax that can be transmitted by the terminal is exceeded

on any overlapped portion.)
In the situation where a dual connectivity or a multiple PUCCH configuration is set in the UE as shown in FIG. 13, if the UE PUCCH transmission in the subframe i of the serving cell of the MCG corresponds to the first symbol of the PUSCH transmission in the subframe i + 1 of the serving cell of the SCG, When overlapping, the terminal shall adjust so that no overlapping part exceeds the total maximum transmit power of the terminal, P _CMAX . (If the UE is configured with [multiple PUCCH configuration or transmission] or [dual connectivity capability], and if the PUCCH transmission of the UE on subframe i for a given serving cell on a primary cell group (MCG) overlaps some portion of the first symbol of the PUSCH transmission on the subframe i + 1 for a different serving cell on a secondary cell group (SCG) UE shall adjust its total transmission power to not exceed

on any overlapped portion.

- PUSCH under different cell group configuration on MCG is transmitted and PUCCH on When the SCG is simultaneously transmitted, if the maximum transmission power Pcmax that can be transmitted by the terminal is exceeded

on any overlapped portion.)
14, when a dual connectivity or multiple PUCCH configuration is set in the UE, if the UE PUSCH transmission in the sub-frame i of the MCG serving cell is the first symbol of the PUCCH transmission in the sub-frame i + 1 of the serving cell of the SCG When some overlap is made, the UE must adjust so that no overlapping part does not exceed P _CMAX , which is the total maximum transmission power of the UE. (If the UE is configured with [multiple PUCCH configuration or transmission] or [ the PUSCH transmission on the subframe i for a given serving cell on a primary cell group (MCG) overlaps some portion of the first symbol on the PUCCH transmission on the subframe i + 1 for a different serving cell on a secondary cell group (SCG) the UE shall adjust its total transmission power to not exceed

on any overlapped portion.

- SRS in one cell group under different cell group configuration on MCG is transmitted and PUCCH / PUSCH on When the SCG is transmitted simultaneously, it exceeds the maximum transmission power Pcmax that the terminal can transmit .

FIG. 15 shows a case where SRS is transmitted in the MCG, and FIG. 16 shows a case where SRS is transmitted in the SCG.

on any overlapped portion of the symbol.)
15 and 16, when a dual connectivity or a multiple PUCCH configuration is set in the UE, if the terminal SRS transmitted in one symbol of the subframe i of the serving cell of one cell group is a serving of another cell group If the PUCCH / PUSCH transmission is partially overlapped with the subframe i or i + 1 of the cell, the UE drops the SRS so as not to exceed P _CMAX , which is the total maximum transmission power of the UE, in the overlapped portion of the symbol. The UE is configured with multiple PUCCH configuration or transmission or dual connectivity capability, and if the SRS transmission of the UE is a subframe for a given cell on a Cell Group (CG) overlaps with the PUCCH / PUSCH transmission on subframe i or subframe i + 1 for a different serving cell on another cell group (CG), the UE shall drop SRS if its total transmission power exceeds

on overlapped portion of the symbol.

- When the PRACH is transmitted in one or more cells of one cell group under different cell group configurations and the SRS is concurrently transmitted in a cell belonging to another cell group, if the maximum transmission power Pcmax that the terminal can transmit

FIG. 17 shows the case where the PRACH is transmitted in the MCG and the SRS is transmitted in the SCG. FIG. 18 shows a case where the PRACH is transmitted in the SCG and the SRS is transmitted in the MCG

on any overlapped portion in the symbol.)
As shown in FIGS. 17 and 18, in a situation where a dual connectivity or a multiple PUCCH configuration is set in the UE, the UE transmits a PRACH in one or more serving cells of one cell group and a PRACH in one or more serving cell subframe symbols of another cell group SRS transmission. When a request is received from an upper layer, the SRS is dropped if the symbols are overlapped and exceed the total maximum transmission power P _CMAX of the UE. (If the UE is configured with [multiple PUCCH configuration or transmission] or [dual connectivity capability, the UE shall, when requested by higher layers, to transmit PRACH in more than a serving cell on a cell in parallel with SRS transmission in a symbol on a subframe of a different cell belonging to a different cell Group, drop SRS if the total transmission power exceeds

on overlapped portion in the symbol.

- For each other in other cell groups are PRACH is transmitted in one or more cells of a cell group, which PUSCH / PUCCH are simultaneously transferred from the cell (s) belonging to the other group of cells, the maximum transmission power Pcmax which the UE can transmit If over.

on the overlapped portion.)
17 and 18, in a situation where a dual connectivity or a multiple PUCCH configuration is set in the UE, the UE transmits a PRACH in one or more serving cells of one cell group and one or more serving cell services PUSCH / PUCCH transmission is performed in a frame, and when a request is made from an upper layer, the transmission power of the PUSCH / PUCCH is adjusted so that the total maximum transmission power P _CMAX of the UE does not exceed the overlapping portion. (If the UE is configured with [ PUCCH / PUCCH in more than a different serving cell belonging &lt; RTI ID = 0.0 &gt; to a different Cell Group, adjust the transmission power of PUSCH / PUCCH so that its total transmission power does not exceed

on the overlapped portion.

As shown in FIGS. 19 to 21, in a dual connectivity situation, a UE can transmit PUCCH, PUSCH, and SRS in serving cells of different cell groups. Here, the transmission power allocation method of the present invention described with reference to FIGS. 11 to 18 can also be applied.

Referring to FIG. 19, a PUCCH may be transmitted in one cell of the MCG, and a PUCCH may be transmitted in one cell of the SCG. Also, the PUSCH can be transmitted in each serving cell constituting the MCG and the SCG. Here, some PUSCHs may not include a UCI.

20, the PUCCH may be transmitted in one cell of the MCG, and the PUCCH may be transmitted in one cell of the SCG. Also, SRS and PUSCH may be transmitted in the serving cell of each cell group to which the PUCCH is transmitted, and some PUSCH may not include UCI. Here, the SRS of the MCG may overlap with the PUCCH of the SCG.

In the case of FIG. 21, the PUCCH may be transmitted in one cell of the MCG, and the PUCCH may be transmitted in one cell of the SCG. Also, SRS and PUSCH may be transmitted in the serving cell of each cell group to which the PUCCH is transmitted, and some PUSCH may not include UCI. Here, the SRS of the MCG does not overlap with the PUCCH of the SCG.

The relationship between the maximum total transmission power of the UE and the maximum total transmission power of the UE when the UE simultaneously transmits the uplink channel and the uplink signal is described in detail according to the simultaneous transmission scenario of the uplink channel and the uplink signal.

Hereinafter, a method for allocating transmission power for an uplink channel and an uplink signal for transmission of uplink and uplink signals under dual connectivity according to the present invention will be described. For example, when considering individual transmission or combined transmission of PUCCH / PUSCH / SRS to different base stations or different cell groups under dual connectivity, the uplink PUCCH / PUSCH / SRS To a multiplexing method and a transmission power control method and apparatus for performing transmission power control under a maximum transmission power of a limited terminal for individual transmission or combined transmission.

For a terminal having dual connectivity, a base station may define or signal transmission power that can be guaranteed when considering transmission of a PUCCH or a PUSCH in each cell group.

For example, the MeNB may define and transmit signal to the UE by defining a transmission power (for example, P_MeNB) that can be guaranteed when the UE considers PUCCH or PUSCH transmission in a cell group associated with the MeNB.

For another example, the MeNB may set or transmit signal to the UE by defining a transmission power (for example, P_SeNB) that can be guaranteed when considering the PUCCH or PUSCH transmission of the UE for a cell group associated with another base station.

As another example, when P_SeNB is defined and signaled from the MeNB or the master cell group, transmission power is secured with respect to a certain portion of the transmission of at least the PUCCH or PUSCH for transmission to the corresponding base station or cell group So that each base station can perform transmission.

In the present invention, when the total maximum transmission power of the UE is P_cmax and the P_MeNB and the P_SeNB are set in the UE, the maximum transmission power of the UE can be allocated at the time of individual transmission or combination transmission of PUCCH, PUSCH, or SRS to different base stations The transmission power control for each uplink channel and uplink signals and the operation of the UE are proposed. .

22 is a diagram illustrating an example in which the uplink maximum transmit power of each cell group of the present invention is determined.

Referring to FIG. 22, two cases can be considered as in the case of FIGS. 22 (a) and 22 (b), assuming that the sum of P_MeNB and P_SeNB is set so as not to exceed 100% of Pcmax. That is, in the case (a), the sum of P_MeNB + P_SeNB is set to Pcmax, and in the case (b), the sum of P_MeNB + P_SeNB is set to be smaller than Pcmax.

23 is a view for explaining operations of a terminal according to an embodiment of the present invention.

A method for controlling uplink transmission power in a UE according to an embodiment of the present invention includes: setting uplink maximum transmission power for each of a plurality of cell groups including at least one serving cell; Allocating a transmission power of an uplink channel and an uplink signal based on at least one of a total transmission power of one or more uplink channels transmitted in each of the plurality of cell groups and an uplink signal and a total maximum transmission power of the terminal . Here, the uplink channel may include a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal may include a SRS (Sounding Reference Signal).

Referring to FIG. 23, the UE includes a step of setting an uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells (S2310). For example, a terminal having dual connectivity from a base station can set uplink maximum transmit power for each of a plurality of cell groups. Uplink maximum transmit power may be set independently for each cell group, and information for setting uplink maximum transmit power from the MeNB may be received and set. Also, the total sum of the uplink maximum transmit powers of the plurality of cell groups set may be set to be equal to or less than the total maximum transmit power of the UE. That is, the uplink maximum transmit power of each of the plurality of cell groups can be set as shown in case (a) of FIG. Alternatively, the uplink maximum transmit power of each of the plurality of cell groups may be set as shown in case (b) of FIG.

The UE calculates the maximum transmission power of the uplink channel and the uplink signal based on at least one of the uplink maximum transmission power, the total transmission power of one or more uplink channels transmitted in each of the plurality of cell groups and the uplink signal, And allocating transmission power (S2320). For example, the UE must allocate transmission power for each uplink channel and uplink signal to transmit an uplink channel and an uplink signal. In order to do this, the UE determines whether the uplink maximum transmission power of the corresponding cell group set in step S2310, the maximum total transmission power of the UE (the above-described Pcmax), and the sum of the transmission power of the uplink channel and the uplink signal to be transmitted The transmission power of the uplink channel and the uplink signal can be allocated using the above information.

For example, if the total transmission power of the uplink channel and the uplink signal in the plurality of cell groups is within the UL maximum transmission power, the UE can allocate the SRS transmission power independently in each of the plurality of cell groups. Specifically, if the total transmission power of an uplink channel and an uplink signal to be transmitted by a terminal to a base station constituted by the corresponding cell group is equal to or less than the uplink maximum transmission power set in the corresponding cell group, The SRS transmission power included in the SRS can be guaranteed and allocated.

In another example, when the total transmission power of an uplink channel and an uplink signal in a cell group of a plurality of cell groups exceeds an uplink maximum transmission power of a certain cell group, the terminal calculates a transmission power of the PUCCH and a PUSCH May be allocated prior to the transmission power of the SRS. Specifically, the UE allocates transmission power for uplink channels and uplink signals independently in each of a plurality of cell groups. However, when transmission power allocation for the uplink channel and the uplink signal is required beyond the maximum UL transmission power, the UE allocates the transmission power of the PUCCH and the PUSCH in preference to the SRS. For example, the UE may preferentially allocate the transmission power of the PUCCH and the PUSCH in the corresponding cell group, scaling down the transmission power of the SRS for the uplink transmission power remaining after allocation, or drop the transmission of the SRS. can do.

As another example, the UE can assign the PUCCH and PUSCH transmission power in any cell group among a plurality of cell groups prior to the SRS transmission power of another cell group. Specifically, the UE can transmit an uplink channel and an uplink signal in each of a plurality of cell groups. In this case, the terminal preferentially allocates the transmission power of the PUCCH and the PUSCH in each cell group. That is, when the sum of the transmission power of the uplink channel and the uplink signal to be transmitted from one terminal to a plurality of base stations exceeds the total maximum transmission power of the terminal, which is the maximum transmission power that the terminal can transmit, The transmission power of the PUCCH and the PUSCH of the group can be allocated in priority to the SRS transmission power of another cell group. For example, the PUCCH and PUSCH transmit power at the MCG may be assigned prior to the SRS transmit power of the SCG. Likewise, the PUCCH and PUSCH transmit power at the SCG can be allocated prior to the SRS transmit power of the MCG.

As another example, the UE can allocate the SRS transmission power of a cell group associated with a base station operating as a mobility anchor among a plurality of cell groups in preference to the SRS transmission power of another cell group. As described above, there exists a base station serving as a mobility anchor for the core network in a dual connectivity situation. In the above, this base station is referred to as MeNB. Accordingly, the UE can allocate the SRS transmission power of the MCG associated with the MeNB in preference to the SRS transmission power of the SCG in the power limitation state of the UE.

As described above, the UE can allocate the transmission power for the uplink channel and the uplink signals. That is, each uplink channel and uplink signal may be allocated according to priority in a UE-restricted situation where the total sum of the requested transmission power of the uplink channel and the uplink signals exceeds the total maximum transmission power of the UE. Each of the above embodiments may be applied independently or in combination. For example, in the case of mutual combination, the transmission power allocation priority of the uplink channel and the uplink signal takes precedence over the SRS in the PUCCH and PUSCH, and the SRS in the MCG can be allocated in priority to the SRS in the SCG.

A method of allocating transmission power of each uplink channel and an uplink signal according to individual conditions such as a power limitation state of the UE will be described in detail below.

In each of cases (a) and (b) of FIG. 22, the terminal may control SRS transmission power control differently. Therefore, the present invention will be described by dividing each embodiment into SRS transmission power control methods and apparatuses so that they can be applied to respective conditions.

Includes both cases where one or both of the PUCCH / PUSCH may not be present at a certain point in the "required transmission power value required for PUCCH / PUSCH transmission"

On the other hand, in setting the transmission power for different cell groups, allocation of additional residual power to each cell group may be considered together with P_MeNB and P_SeNB described above. Specifically, transmission power is allocated before transmission on the basis of the PUCCH or PUSCH to be actually transmitted in different cell groups. In consideration of this, in a specific subframe, there may be a specific subframe of a specific cell group in which neither PUCCH nor PUSCH or both are transmitted. Therefore, the margin power may exist in both of FIGS. 22A and 22B, and if Pcmax is the total maximum transmission power of the UE, a margin power may exist.

For example, the allocation of the reserved power as described above is based on whether the base station can know the scheduling information for the other base station or whether the timing of transmitting the terminal to different base stations is synchronous or asynchronous, And may or may not support look-ahead so as to know in advance the transmission to other base stations. In particular, at least the PUCCH or PUSCH may be assigned a transmission power according to a priority order. The priority of the PUCCH or PUSCH may be determined based on a synchronization state (synch / asynch), a look- A value that can be assumed that the synchronization timing is correct when the terminal transmits the timing difference to the two base stations that are in the vicinity of [33us]. The transmission power for the different cell groups may be finally allocated. In consideration of such a conditional situation, the terminal operation scheme in Figs. 22 (a) and 22 (b) will be described below by way of example.

1. When the required power for PUCCH / PUSCH / SRS transmission in MeNB or MCG is P_MeNB or less and the required power for PUCCH / PUSCH / SRS transmission in SeNB or SCG is P_SeNB or less (Required Power for PUCCH / PUSCH / SRS transmission on MeNB < = P_MeNB and Required Power for PUCCH / PUSCH / SRS transmission on SeNB < = PSeNB).

When the sum of the required transmission power value required for transmission of the PUCCH / PUSCH and the required transmission power value required for transmission of the SRS in each cell group does not exceed the respective P_MeNB and P_SeNB, the transmission power The transmission power of the SRS for each cell group is guaranteed. That is, the SRS in each cell group can be set to be transmitted to each base station.

2. PUCCH / PUSCH / SRS transmission in MeNB or MCG under the condition that the required power for PUCCH / PUSCH transmission in MeNB or MCG is P_MeNB or less and the required power for PUCCH / PUSCH transmission in SeNB or SCG is P_SeNB or less (PUCCH / PUSCH on MeNB < = P_MeNB, Required Power for PUCCH / PUSCH on < SEP > on &lt; SEP &gt; SeNB <= PSeNB and Required Power for PUCCH / PUSCH / SRS on MeNB> P_MeNB, Required Power for PUCCH / PUSCH / SRS on SeNB> PSeNB).

2, the transmission power of at least PUCCH / PUSCH is guaranteed at each MCG and SCG. However, when the required transmission power value of the SRS is included, the sum of the PUCCH / PUSCH / SRS required transmission powers exceeds P_MeNB and P_SeNB for uplink transmission, and the transmission power required for the transmission to each base station Exceeds the total maximum transmission power Pcmax that the terminal can transmit. That is, the terminal is in a power limited state. In this case, the SRS transmission power in each cell group is allocated with the lowest priority transmission power. For example, each cell group may scaling down the transmission power of the SRS or drop the transmission of the SRS so that it does not exceed Pcmax for SRS transmission.

As another example, the UL scheduling to the MeNB may be important for SRS transmissions to different base stations, so that the MeNB can be prioritized. For example, scaling down can be considered under the scaling down or dropping of SRS transmissions to SeNB, and not exceeding Pcmax for SRS transmissions to MeNB. That is, the SRS transmission power of the MCG can be allocated prior to the SRS transmission power of the SCG.

As another example, in the above case, the UE may preferentially allocate transmission power to an aperiodic SRS triggered from a base station rather than a periodic SRS.

3. PUCCH / PUSCH / SRS transmission in MeNB or MCG under the condition that the required power for PUCCH / PUSCH transmission in MeNB or MCG is P_MeNB or less and the required power for PUCCH / PUSCH transmission in SeNB or SCG is P_SeNB or less PUSCH on PUSCH / PUSCH on PUSCH / PUSCH on PUSCH / SRS transmission in SeNB or SCG is equal to or less than P_SeNB (Required Power for PUCCH / PUSCH on MeNB <= P_MeNB, Required Power for PUCCH / PUSCH on SeNB < = PSeNB and Required Power for PUCCH / PUSCH / SRS on MeNB> P_MeNB, Required Power for PUCCH / PUSCH / SRS on SeNB <= PSeNB)

The transmission power of at least PUCCH / PUSCH is guaranteed at each MCG and SCG. However, when the requested transmission power value of the SRS is included, the sum of the transmission power required by the terminal exceeds the total maximum transmission power Pcmax that the terminal can transmit, so the terminal is in a power limited state. In this case, the UE sets up to guarantee transmission of SRS to the SeNB, and for SRS transmission to the MeNB, scaling down or drop the transmission power for SRS transmission so as not to exceed the Pcmax of the UE. That is, since the transmission power allocation in each cell group is performed independently, the SRS transmission to the SeNB is guaranteed, and the SRS transmission to the MeNB can be scaled down or dropped.

As another example, the UL scheduling to the MeNB may be important for SRS transmissions to different base stations, so that the MeNB can be prioritized. Therefore, the SRS transmission to the SeNB may be scheduled down or dropped, and the SRS transmission to the MeNB may be set to be scaled down without exceeding Pcmax.

As another example, the aperiodic SRS triggered from the base station may be preferentially assigned to the periodic SRS in the above case.

4. PUCCH / PUSCH / SRS transmission in MeNB or MCG under the condition that the required power for PUCCH / PUSCH transmission in MeNB or MCG is P_MeNB or less and the required power for PUCCH / PUSCH transmission in SeNB or SCG is P_SeNB or less PUSCH / PUSCH on PUSCH / PUSCH / SRS is greater than P_SeNB (Required Power for PUCCH / PUSCH on MeNB <= P_MeNB, Required Power for PUCCH / PUSCH on SeNB <= PSeNB and Required Power for PUCCH / PUSCH / SRS on MeNB <= P_MeNB, Required Power for PUCCH / PUSCH / SRS on SeNB> PSeNB)

The transmission power of at least PUCCH / PUSCH is guaranteed at each MCG and SCG. However, when the requested transmission power value of the SRS is included, the sum of the transmission power required by the terminal exceeds the total maximum transmission power Pcmax that the terminal can transmit, so the terminal is in a power limited state. In this case, the UE sets up the SRS transmission to the MeNB to be guaranteed, and for the SRS transmission to the SeNB, the transmission power for the SRS transmission can be scaled down or dropped so as not to exceed the Pcmax of the UE.

As another example, the aperiodic SRS triggered from the base station may be preferentially assigned to the periodic SRS in the above case.

5. PUCCH / PUSCH / SRS transmission in MeNB or MCG, when the required power for PUCCH / PUSCH transmission in MeNB or MCG exceeds P_MeNB and the required power for PUCCH / PUSCH transmission in SeNB or SCG is P_SeNB or less PUSCH / PUSCH on the SeNB or the SCG is less than or equal to P_SeNB (Required Power for PUCCH / PUSCH on MeNB> P_MeNB, Required Power for PUCCH / PUSCH on SeNB <= PSeNB and Required Power for PUCCH / PUSCH / SRS on MeNB> P_MeNB, Required Power for PUCCH / PUSCH / SRS on SeNB <= PSeNB)

In such a case, the UE selects {(P_cmax - P_SeNB), (P_cmax - Required Power for PUCCH / PUSCH on P_SeNB), and (P_cmax - Required Power for PUCCH / PUSCH / SRS on P_SeNB)} may be used to determine the final transmit power for the corresponding MeNB. In this case, since the UE is in a power limited state, the UE can be configured to perform scaling or drop of the transmission power of the SRS transmitted to the MeNB based on the final transmission power for MeNB. Also, the terminal can set the transmission to be guaranteed so that the sum of the PUCCH / PUSCH / SRS required power for SeNB does not exceed P_SeNB for SRS transmitted to the SeNB.

As another example, the UE may scaling down or drop the SRS transmission power to the SeNB if the requested transmission power of the PUCCH / PUSCH to be transmitted to the MeNB is not satisfied with respect to the SRS transmitted from the SeNB. That is, the PUCCH / PUSCH to be transmitted to the MeNB can be allocated prior to the SRS transmission power of the SeNB.

As another example, the UL scheduling to the MeNB may be important for SRS transmissions to different base stations, so that the MeNB can be prioritized. Therefore, the SRS transmission to the SeNB may be scheduled down or dropped, and the SRS transmission to the MeNB may be set to be scaled down without exceeding Pcmax.

As another example, the aperiodic SRS triggered from the base station may be preferentially assigned to the periodic SRS in the above case.

6. PUCCH / PUSCH / SRS transmission in MeNB or MCG when the required power for PUCCH / PUSCH transmission in MeNB or MCG exceeds P_MeNB and the required power for PUCCH / PUSCH transmission in SeNB or SCG is P_SeNB or less (PUCCH / PUSCH on MeNB> P_MeNB, Required Power for PUCCH / PUSCH on (PUCCH / PUSCH on) is greater than P_MeNB and the required power for PUCCH / PUSCH / SRS transmission in the SeNB or SCG exceeds P_SeNB SeNB <= PSeNB and Required Power for PUCCH / PUSCH / SRS on MeNB> P_MeNB, Required Power for PUCCH / PUSCH / SRS on SeNB> PSeNB)

In such a case, the UE sets {(P_cmax - P_SeNB), (P_cmax - Required Power for PUCCH / PUSCH on P_SeNB), and (P_cmax - Required Power for PUCCH / PUSCH / SRS on P_SeNB)} may be used to determine the final transmit power for the corresponding MeNB. In this case, since the UE is in a power limited state, the UE can be configured to perform scaling or drop of the transmission power of the SRS transmitted to the MeNB based on the final transmission power for MeNB. In addition, the UE sets the lowest priority for SRS transmission to each cell group, scales down the transmission power for transmission to each base station so that the SRS transmission does not exceed Pcmax for the corresponding SRS transmission, You can drop the transmission.

As another example, the UL scheduling to the MeNB may be important for SRS transmissions to different base stations, so that the MeNB can be prioritized. Therefore, the SRS transmission to the SeNB may be scheduled down or dropped, and the SRS transmission to the MeNB may be set to be scaled down without exceeding Pcmax.

As another example, the aperiodic SRS triggered from the base station may be preferentially assigned to the periodic SRS in the above case.

7. PUCCH / PUSCH / SRS in MeNB or MCG, if the required power for PUCCH / PUSCH transmission in MeNB or MCG is P_MeNB or less and the required power for PUCCH / PUSCH transmission in SeNB or SCG exceeds P_SeNB If the required power for transmission is less than P_MeNB and the required power for transmission of PUCCH / PUSCH / SRS in SeNB or SCG exceeds P_SeNB (Required Power for PUCCH / PUSCH on MeNB <= P_MeNB, Required Power for PUCCH / on SeNB> PSeNB and Required Power for PUCCH / PUSCH / SRS on MeNB <= P_MeNB, Required Power for PUCCH / PUSCH / SRS on SeNB> PSeNB)

In such a case, the UE sets {(P_cmax - P_MeNB), (P_cmax - Required Power for PUCCH / PUSCH on P_MeNB), and (P_cmax) according to the above- (P_cmax - Required Power for PUCCH / PUSCH / SRS on P_MeNB)} may be used to determine the final transmit power for the SeNB.

Since the UE is in a power limited state in this case, the UE can scale or drop the transmission of the SRS transmitted to the SeNB based on the final transmission power for the SeNB. Also, since the PUCCH / PUSCH / SRS transmission power to be transmitted to the MeNB does not exceed P_MeNB, the terminal can be configured to guarantee transmission for SRS.

As another example, if the requested transmission power of the PUCCH / PUSCH to be transmitted to the SeNB is not satisfied, the UE may scaling down or drop the transmission power to the SRS transmitted to the MeNB.

As another example, the aperiodic SRS triggered from the base station may be preferentially assigned to the periodic SRS in the above case.

8. PUCCH / PUSCH / SRS in MeNB or MCG, if the required power for PUCCH / PUSCH transmission in MeNB or MCG is P_MeNB or less and the required power for PUCCH / PUSCH transmission in SeNB or SCG exceeds P_SeNB If the required power for transmission exceeds P_MeNB and the required power for transmission of PUCCH / PUSCH / SRS in SeNB or SCG also exceeds P_SeNB (Required Power for PUCCH / PUSCH on MeNB <= P_MeNB, Required Power for PUCCH / PUSCH on / PUSCH / SRS on SeNB > PSENB > PUSCH / SRS on MeNB > P_MeNB, Required Power for PUCCH /

In such a case, the UE sets {(P_cmax - P_MeNB), (P_cmax - Required Power for PUCCH / PUSCH on P_MeNB), and (P_cmax) according to the above- (P_cmax - Required Power for PUCCH / PUSCH / SRS on P_MeNB)} may be used to determine the final transmit power for the SeNB. Since the UE is in a power limited state in this case, the UE can scale or drop the transmission of the SRS transmitted to the SeNB based on the final transmission power for the SeNB. In this case, the UE sets the lowest priority for the SRS transmission to each cell group, and scales down or drops the SRS transmission power in each cell group so that the maximum SRS transmission does not exceed the maximum Pcmax.

As another example, if the required transmit power of the PUCCH / PUSCH to be transmitted to the SeNB is not satisfied, the UE may scaling down or drop the transmit power for the SRS transmitted to the MeNB.

As another example, since UL scheduling to MeNB may be important in SRS transmission to different base stations, priority is given to MeNB to scale down or drop transmission of SRS to SeNB, and transmission of SRS to MeNB is not limited to Pcmax Scaling down can also be performed.

As another example, the aperiodic SRS triggered from the base station may be preferentially assigned to the periodic SRS in the above case.

In addition, the present invention can be applied to a carrier merging situation through multiple carriers in each cell group. In the case where the uplink channel and the uplink signals overlap in different carriers in each cell group, a conventional Relese-10/11 carrier merging mechanism can be used.

Hereinafter, a transmission power control method for the uplink channel and the uplink signal according to the present invention will be briefly described from the viewpoint of a base station.

24 is a view for explaining the operation of a base station according to another embodiment of the present invention.

A method for receiving an uplink channel and an uplink signal according to another embodiment of the present invention includes configuring a dual connectivity to a terminal and receiving an uplink channel and an uplink signal from the terminal . Here, the uplink channel and the uplink signal include at least one of an uplink maximum transmission power for a plurality of cell groups including one or more serving cells, a total transmission power of an uplink channel and an uplink signal, May be received based on the assigned transmit power based on one. Also, the uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal includes a SRS (Sounding Reference Signal).

Referring to FIG. 24, in a method of receiving an uplink channel and an uplink signal, a base station includes a step of configuring a dual connectivity to a terminal (S2410). For example, the base station may be a MeNB or SeNB, and in the case of a MeNB, a dual connectivity may be configured with the SeNB in the terminal. Similarly, when the base station is the SeNB, the dual connectivity may be configured in the terminal together with the MeNB. Through this, the BS can form a bearer as shown in FIG. 9 or FIG. 10 to configure dual connectivity for the UE.

The base station includes a step of receiving an uplink channel and an uplink signal from the terminal (S2420). The uplink and uplink signals received by the base station include uplink maximum transmit power for each of a plurality of cell groups including one or more serving cells, total transmit power of the uplink channel and the uplink signal, Based on at least one of &lt; RTI ID = 0.0 &gt; a &lt; / RTI &gt; Meanwhile, the uplink channel and uplink signals transmitted by the UE can be received in one subframe. Also, the uplink and uplink signals may be signals transmitted based on the transmission power for simultaneous transmission between uplink channels or uplink channels and uplink signals, which are independently determined in each cell group

For example, the transmission power of the SRS can be independently allocated in a cell group associated with a base station when a total transmission power of an uplink channel and an uplink signal in a cell group associated with the base station is within an uplink maximum transmission power.

In another example, the transmission power of the PUCCH and the PUSCH can be allocated in priority to the transmission power of the SRS when the sum of the transmission power of the uplink channel and the uplink signal in the cell group associated with the base station exceeds the UL maximum transmission power.

As another example, the transmission power of the PUCCH and the PUSCH may be allocated in advance of the SRS transmission power transmitted to the base station and the other base station constituting the dual connectivity to the terminal.

In another example, the SRS transmission power is allocated in priority to the SRS transmission power transmitted to the base station and the other base station constituting the dual connectivity, and the base station may be a base station operating as a mobility anchor. That is, the base station to which the SRS transmission power is preferentially allocated is MeNB described above.

In addition, the base station of the present invention may perform various operations required for the terminal to perform the above-described operations of the present invention.

As described above, the present invention provides a method and an apparatus for multiplexing and transmitting a plurality of uplink channels and an uplink signal in transmitting a uplink channel and an uplink signal in a dual connectivity situation . In addition, the present invention provides a concrete method and apparatus for allocating transmission power between each uplink channel and an uplink signal when a UE transmits a plurality of uplink channels and an uplink signal in a dual connectivity situation. In particular, there is provided an apparatus and method for determining a transmission power allocation priority order between an uplink channel and an uplink signal to transmit a plurality of uplink channels and an uplink signal in a transmission power limitation state of a terminal.

Further, when performing carrier merging (i.e., inter-base station carrier merging and dual connectivity support) between base stations having different base station types, carrier merging is performed using carriers having the same or different TDD and FDD duplex modes , It is possible to solve the behavior of the terminal operating according to the setting of the PCell and SCell between the terminal and different base station types and the ambiguity between the terminal and the base station. Accordingly, it is possible to accurately perform transmission and reception operations of the uplink control channel including the connection procedure performed between the subscriber station and the base station, the uplink data transmission, the transmission of the uplink channel and the uplink signal, and the HARQ operation, Thereby ensuring reliability of data transmission of the UE under different duplex modes. Through this, it is possible to increase the data rate of the uplink and the downlink.

A configuration of a terminal and a base station capable of performing all of the above-described present invention will be described with reference to Figs. 25 and 26. Fig.

25 is a diagram illustrating a configuration of a terminal according to another embodiment of the present invention.

25, a user terminal 2500 according to another embodiment of the present invention includes a receiving unit 2530, a control unit 2510, and a transmitting unit 2520.

In detail, the UE 2500 for controlling the uplink transmission power of the present invention sets uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells, and calculates uplink maximum transmission power, A control unit (2510) for allocating a transmission power of an uplink channel and an uplink signal based on at least one of a total transmission power of one or more uplink channels transmitted in each cell group, a total transmission power of an uplink signal, And a transmission unit 2520 for transmitting an uplink channel and an uplink signal based on the transmission power, wherein the uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH) Includes a sounding reference signal (SRS).

For example, when the total transmission power of the uplink channel and the uplink signal is within the uplink maximum transmission power in each of the plurality of cell groups, the controller 2510 allocates the transmission power of the SRS independently in each of the plurality of cell groups . Specifically, if the total transmission power of an uplink channel and an uplink signal to be transmitted to a cell group or a cell group is equal to or less than the uplink maximum transmission power set in the corresponding cell group, The SRS transmission power included in the signal can be guaranteed and allocated.

As another example, when the total transmission power of the uplink channel and the uplink signal in any cell group of the plurality of cell groups exceeds the uplink maximum transmission power of any one of the cell groups, the PUCCH and the PUSCH The transmission power of the SRS may be allocated in priority to the transmission power of the SRS. Specifically, the controller 2510 allocates transmission power for the uplink channel and the uplink signals independently in each of the plurality of cell groups. However, if the transmission power allocation for the uplink channel and the uplink signal is required to exceed the maximum UL transmission power, the controller 2510 allocates the transmission power of the PUCCH and the PUSCH in preference to the SRS. For example, the control unit 2510 may preferentially allocate the transmission power of the PUCCH and the PUSCH in the corresponding cell group, scaling down the transmission power of the SRS for the remaining uplink transmission power remaining after allocation, or drop the transmission of the SRS (not shown).

As another example, the control unit 2510 may assign the PUCCH and PUSCH transmission power in any cell group among a plurality of cell groups in preference to the SRS transmission power of another cell group. Specifically, the control unit 2510 can transmit the uplink channel and the uplink signal in each of the plurality of cell groups. In this case, the control unit 2510 preferentially allocates the transmission power of the PUCCH and the PUSCH in each cell group. That is, when the total transmission power of the uplink and uplink signals exceeds the total maximum transmission power of the UE, the transmission power of the PUCCH and the PUSCH of each cell group is higher than the SRS transmission power of the other cell groups Can be assigned. For example, the PUCCH and PUSCH transmit power at the MCG may be assigned prior to the SRS transmit power of the SCG. Likewise, the PUCCH and PUSCH transmit power at the SCG can be allocated prior to the SRS transmit power of the MCG.

As another example, the control unit 2510 can allocate the SRS transmission power of the cell group associated with the base station operating as the mobility anchor among the number of cell groups to the SRS transmission power of the other cell group. As described above, there exists a base station serving as a mobility anchor for the core network in a dual connectivity situation. In the above, this base station is referred to as MeNB. Accordingly, the controller 2510 may allocate the SRS transmission power of the MCG associated with the MeNB to the SRS transmission power of the SCG in the power limitation state of the UE.

In addition, the controller 2510 controls the overall operation of the UE for multiplexing the uplink channel and the uplink signal and controlling the transmission power in the dual connectivity required to perform the above-described present invention.

The receiver 2530 receives downlink control information, data, and messages from the base station through the corresponding channel. Also, the transmitter 2520 transmits uplink control information, data, and a message to the base station through the corresponding channel.

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

Referring to FIG. 26, a base station 2600 according to another embodiment of the present invention includes a controller 2620, a transmitter 2630, and a receiver 2610.

In detail, the base station 2600 receiving the uplink channel and the uplink signal of the present invention includes a controller 2620 for configuring a dual connectivity to the terminal, and a controller 2620 for receiving an uplink channel and an uplink signal from the terminal The uplink and uplink signals include uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells, total transmission power of an uplink channel and an uplink signal, The uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal is transmitted according to at least one of SRS reference signal.

The controller 2620 configures the dual connectivity to the terminals required to perform the above-described present invention, and controls the overall operation of the base station for multiplexing the uplink channel and the uplink signal and controlling the transmission power of the terminal.

The transmitting unit 2630 and the receiving unit 2610 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the terminal.

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 within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (20)

A method for controlling uplink transmission power of a UE,
Setting uplink maximum transmit power for each of a plurality of cell groups including at least one serving cell; And
Based on at least one of an uplink maximum transmission power, a total transmission power of at least one uplink channel transmitted in each of the plurality of cell groups and an uplink signal, and a total maximum transmission power of the user equipment, Allocating transmission power of the link signal,
Wherein the uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal includes a SRS (Sounding Reference Signal). The method according to claim 1,
When the sum of the transmission powers of the uplink channel and the uplink signal in each of the plurality of cell groups is within the uplink maximum transmission power,
And allocating the transmission power of the SRS independently in each of the plurality of cell groups. The method according to claim 1,
When the total transmission power of the uplink channel and the uplink signal in any cell group of the plurality of cell groups exceeds the uplink maximum transmission power of any one of the cell groups,
Wherein the transmission power of the PUCCH and the PUSCH is allocated prior to the transmission power of the SRS. The method according to claim 1,
Wherein the PUCCH and PUSCH transmission power in any one of the plurality of cell groups is equal to
Gt; SRS &lt; / RTI &gt; transmission power of the other cell group. The method according to claim 1,
Wherein the SRS transmission power of a cell group associated with a base station operating as a mobility anchor among the plurality of cell groups,
Gt; SRS &lt; / RTI &gt; transmission power of the other cell group. A method for a base station to receive an uplink channel and an uplink signal,
Configuring a terminal with dual connectivity; And
Receiving an uplink channel and an uplink signal from the terminal,
Wherein the uplink channel and the uplink signal comprise uplink maximum transmit power for each of a plurality of cell groups including one or more serving cells, total transmit power of the uplink channel and uplink signal, And transmitted in accordance with the transmit power allocated based on at least one,
Wherein the uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal includes a SRS (Sounding Reference Signal). The method according to claim 6,
The transmission power of the SRS is,
Wherein when the total transmission power of the uplink channel and the uplink signal in the cell group associated with the base station is within the uplink maximum transmission power, the cell group is independently allocated in the cell group associated with the base station. The method according to claim 6,
The transmission power of the PUCCH and the PUSCH is,
When a total transmission power of the uplink channel and the uplink signal in the cell group associated with the base station exceeds the uplink maximum transmission power,
Wherein the SRS is allocated prior to the transmission power of the SRS. The method according to claim 6,
The transmission power of the PUCCH and the PUSCH is,
Wherein the SRS transmission power is allocated in priority to the SRS transmission power to be transmitted to the BS and the other BSs constituting dual connectivity to the MS. The method according to claim 6,
The SRS transmission power is calculated by:
And is allocated in priority to the SRS transmission power to be transmitted to the base station and another base station constituting dual connectivity to the terminal,
Wherein the base station is a base station operating as a mobility anchor. A terminal for controlling uplink transmission power,
Setting uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells,
The uplink channel transmission power, the uplink maximum transmission power, the total transmission power of at least one uplink channel transmitted in each of the plurality of cell groups and the uplink signal, and the total maximum transmission power of the terminal, A control unit for allocating transmission power of a signal; And
And a transmitter for transmitting uplink signals to the uplink channel based on the allocated transmission power,
Wherein the uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal includes a SRS (Sounding Reference Signal). 12. The method of claim 11,
Wherein,
When the sum of the transmission powers of the uplink channel and the uplink signal in each of the plurality of cell groups is within the uplink maximum transmission power,
And allocates the transmission power of the SRS independently in each of the plurality of cell groups. 12. The method of claim 11,
Wherein,
When the total transmission power of the uplink channel and the uplink signal in any cell group of the plurality of cell groups exceeds the uplink maximum transmission power of any one of the cell groups,
And allocates the transmission power of the PUCCH and the PUSCH in preference to the transmission power of the SRS. 12. The method of claim 11,
Wherein,
The PUCCH and the PUSCH transmission power in any one of the plurality of cell groups,
A terminal that assigns priority to SRS transmission power of another cell group. 12. The method of claim 11,
Wherein,
The SRS transmission power of a cell group associated with a base station operating as a mobility anchor among the plurality of cell groups,
A terminal that assigns priority to SRS transmission power of another cell group. A base station for receiving an uplink channel and an uplink signal,
A controller configured to configure a dual connectivity in the terminal; And
And a receiver for receiving an uplink channel and an uplink signal from the terminal,
Wherein the uplink channel and the uplink signal comprise uplink maximum transmit power for each of a plurality of cell groups including one or more serving cells, total transmit power of the uplink channel and uplink signal, And transmitted in accordance with the transmit power allocated based on at least one,
Wherein the uplink channel includes a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), and the uplink signal includes a SRS (Sounding Reference Signal). 17. The method of claim 16,
The transmission power of the SRS is,
Wherein when the total transmission power of the uplink channel and the uplink signal in a cell group associated with the base station is within the uplink maximum transmission power, the base station is independently allocated in a cell group associated with the base station. 17. The method of claim 16,
The transmission power of the PUCCH and the PUSCH is,
When a total transmission power of the uplink channel and the uplink signal in the cell group associated with the base station exceeds the uplink maximum transmission power,
Wherein the SRS is allocated prior to the transmission power of the SRS. 17. The method of claim 16,
The transmission power of the PUCCH and the PUSCH is,
Wherein the SRS transmission power is allocated in priority to the SRS transmission power to be transmitted to the BS and another BS constituting dual connectivity to the MS. 17. The method of claim 16,
The SRS transmission power is calculated by:
And is allocated in priority to the SRS transmission power to be transmitted to the base station and another base station constituting dual connectivity to the terminal,
Wherein the base station is a base station operating as a mobility anchor.

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