KR101674791B1 - Methods for controlling the transmission power of uplink signals and Apparatuses thereof - Google Patents

Abstract

The present invention relates to a method and apparatus for allocating or controlling transmission power in transmitting an uplink signal. In more detail, in a dual connectivity environment in which a mobile station transmits and receives signals to and from different base stations, when the mobile station transmits various types of channels or signals in the uplink, the uplink channels or signals between the same base station or different base stations are multiplexed And more particularly, In particular, the present invention provides a method for controlling uplink transmission power of a mobile station, comprising: determining an uplink maximum transmission power for each of a plurality of cell groups including at least one serving cell; And transmitting the uplink channel and the uplink signal of each of the plurality of cell groups using the transmission power.

Description

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

The present invention relates to a method and apparatus for allocating or controlling transmission power in transmitting an uplink channel and a signal. In more detail, in a dual connectivity environment in which a mobile station transmits / receives signals to / from different base stations, when the mobile station transmits various channels or signals in the uplink, the uplink channels or signals between the same base station or different base stations are multiplexed And more particularly,

As communications systems evolved, consumers, such as businesses and individuals, used a wide variety of wireless terminals. In a mobile communication system such as the current 3GPP family Long Term Evolution (LTE) and LTE-A (LTE Advanced), a high-speed and large-capacity communication system capable of transmitting and receiving various data such as video and wireless data, , It is required to develop a technology capable of transmitting large-capacity data based on a wired communication network. 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, there is no discussion as to how to distribute the limited terminal transmission power to a plurality of base stations constituting the dual connectivity, or to distribute the transmission power between various signals that can be simultaneously transmitted. In such a situation, there are many problems in that the terminal processes a large amount of data at a high speed by using a plurality of base stations. That is, there is a problem in that the terminal can not transmit the uplink signal using the dual connectivity because the problem of how to allocate the transmission power to each signal and transmit the signal can not be solved.

The present invention conceived in the above situation is to propose a specific method and apparatus for controlling uplink transmission power when a UE transmits an uplink channel or signal in a dual connectivity situation.

In addition, the present invention proposes a concrete transmission power allocation method and apparatus for simultaneously transmitting an uplink channel and a signal in a dual connectivity situation.

In addition, the present invention proposes a method and apparatus for setting a transmission indicator for simultaneously transmitting a channel and a signal for each cell group in the case of simultaneously transmitting an uplink channel and a signal in a dual connectivity situation.

According to another aspect of the present invention, there is provided a method of controlling uplink transmission power of a mobile station, the method comprising: configuring a dual connectivity in a mobile station; Determining an uplink maximum transmission power with respect to each cell group and indicating a maximum transmission power for each cell group to the terminal.

The present invention also provides a method for controlling uplink transmission power of a mobile station, the method comprising: determining an uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells; And transmitting an uplink channel and an uplink signal of each of the plurality of cell groups using the transmission power.

According to another aspect of the present invention, there is provided a method of 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 transmitted from the terminal, Wherein the uplink channel and the uplink signal are transmitted based on an uplink maximum transmission power for a group of cells including one or more cells provided by the base station.

In addition, the present invention provides a UE for controlling uplink transmission power, comprising: a controller for determining an uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells; And a transmitter for transmitting an uplink channel and an uplink signal of each of the plurality of cell groups using power.

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 controller configured to establish dual connectivity with the terminal and a receiver for receiving an uplink channel and an uplink signal transmitted from the terminal, , The uplink channel and the uplink signal are transmitted based on the uplink maximum transmission power for a cell group including one or more cells provided by the base station.

According to another aspect of the present invention, there is provided a method of setting a simultaneous transmission indicator of an uplink channel and an uplink signal to a terminal, the method comprising: configuring a dual connectivity to the terminal; (PUCCH and PUSCH) for the uplink control channel (PUCCH) and the uplink signal (SRS) to the uplink control channel (PUCCH and PUSCH) And setting the ackNackSRS-SimultaneousTransmission setting independently for each cell group.

According to another aspect of the present invention, there is provided a method for transmitting, from a base station to a plurality of cell groups, simultaneous transmission of an uplink channel and an uplink signal in each of a plurality of cell groups, (Simultaneous_PUCCH-PUSCH) setting for the uplink control channel and the data channel (PUCCH + PUSCH) for each of the cell groups of the uplink control channel (PUCCH) and the uplink signal (SRS) ackNackSRS-SimultaneousTransmission), the UE transmitting concurrent transmission of the uplink channel and the signal to each of the plurality of cell groups.

As described above, the present invention provides a concrete method of controlling the uplink transmission power when a UE transmits an uplink channel or a signal in a dual connectivity situation.

In addition, the present invention provides a concrete transmission power allocation method and apparatus for simultaneously transmitting an uplink channel and a signal in a dual connectivity situation.

In addition, the present invention provides a method for simultaneously transmitting uplink channels and signals to each cell group in a dual connectivity situation, wherein independent transmission indicator setting for each cell group for simultaneous transmission of channels and signals transmitted to each cell group is performed A method and an apparatus for performing concurrent transmission of an uplink channel and a signal in different cell groups are provided.

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 is a diagram for explaining operations of a terminal according to an embodiment of the present invention.
12 is a view for explaining an operation of a base station according to another embodiment of the present invention.
13 is a view for explaining the operation of a base station according to another embodiment of the present invention.
FIG. 14 through FIG. 24 are diagrams for explaining respective embodiments of a method for transmitting an uplink signal or a channel by a terminal according to the present invention.
25 is a diagram illustrating a configuration of a user 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 symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

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

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 systems such as LTE and LTE-Advanced, the uplink and downlink are configured on the basis of one carrier or carrier pair to form a standard. The uplink and 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 multipoint transmission / reception point to a terminal, and an uplink refers to a communication or communication path from a terminal to a multiple 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: The number of bits of Ack / nack and the modulation scheme (Ack / nack) as a channel for transmitting a scheduling request and / or a response information for a downlink data channel 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 a UE transmission power of an uplink channel or 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 전송전력를 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.

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 one base station is considered, and different base stations are configured to configure multiple cells or element carriers, and a PUCCH is transmitted from one cell to another under different base stations . Therefore, when the PUCCH is transmitted in the PCN of MeNB as in the dual connectivity environment, and the PUCCH transmission in the serving cell that is part of the PUCCH transmission in another serving cell and the PCell function of another SeNB is considered, It is necessary to newly define and apply the multiplexing method and the power control method between the uplink signals. 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 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.

11 is a diagram for explaining operations of a terminal according to an embodiment of the present invention.

The UE according to an embodiment of the present invention controls the uplink transmission power by determining uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells, And transmitting the uplink channel and the uplink signal of each of the plurality of cell groups using the link maximum transmission power.

Referring to FIG. 11, the UE may include determining uplink maximum transmission power for each of a plurality of cell groups including one or more serving cells (S1110). The UE can determine the uplink maximum transmission power for each of the cell groups described above. For example, the uplink maximum transmit power for the master cell group (MCG), which is a group of one or more serving cells associated with the master base station, may be determined. Similarly, an uplink maximum transmit power for a secondary cell group (SCG), which is a group of one or more serving cells associated with a secondary base station, can be determined. That is, the UE can determine the uplink maximum transmission power for each cell group in the dual connectivity environment. The uplink maximum transmit power determined for each cell group may be set to be the same or may be set differently.

For example, the sum of uplink maximum transmit power for each of a plurality of cell groups may be determined to be equal to or less than a total maximum transmit power of the UE. Specifically, the sum of the uplink maximum transmission power of the MCG and the uplink maximum transmission power of the SCG may be determined to be equal to the total maximum transmission power of the UE. Or the sum of the uplink maximum transmission power of the MCG and the uplink maximum transmission power of the SCG may be determined to be smaller than the total maximum transmission power of the UE. That is, assuming that the total maximum transmission power of the UE is 100, the uplink maximum transmit power for the MCG may be set to 50, and the uplink maximum transmit power for the SCG may be set to 30. [

Meanwhile, in determining the transmission power of one or more uplink channels or uplink signals, the UE can independently determine each of the cell groups using the uplink maximum transmission power for each cell group. For example, the transmit power for the simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal may be determined based on the uplink maximum transmit power of each cell group in each cell group.

For example, the transmit power for simultaneous transmission between the uplink channels may include transmit power for simultaneous transmission between the PUCCH and the PUSCH. As another example, the transmit power for simultaneous transmission of the uplink channel and the uplink signal may include transmit power for simultaneous transmission between the PUCCH / PUSCH and the SRS.

In addition, the transmission power for transmission of the uplink channel and the uplink signal may be determined in each of the plurality of cell groups, and then determined among the cell groups. In other words, the transmission power of each channel or signal is independently determined in each cell group using the determined maximum UL transmission power in each cell group, and then the transmission power is determined between the cell groups. For example, the transmission power of each uplink channel and signal is primarily determined in a cell group including an uplink channel and a serving cell to which a signal is transmitted. Thereafter, if there is a transmission power to allocate the transmission power of all the uplink channels or signals in any cell group, the remaining transmission power can be used as the transmission power of the uplink channel or signal of another cell group.

In addition, the UE includes a step of transmitting an uplink channel and an uplink signal of each of the plurality of cell groups using the uplink maximum transmission power of each of the plurality of cell groups (S1120). The uplink channel and the signal can be transmitted to the base station with the transmission power allocated by the above-described transmission power allocation method.

The method of determining transmission power according to transmission of each uplink channel or signal will be described in detail in each embodiment below.

12 is a view for explaining an 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 may be transmitted based on the uplink maximum transmission power for a cell group including one or more cells provided by the base station.

Referring to FIG. 12, the base station of the present invention includes a step of configuring a dual connectivity to a terminal (S1210). 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.

Meanwhile, the uplink channel and the uplink signal 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 a cell group.

For example, the transmit power for uplink channel simultaneous transmission may include the transmit power for simultaneous transmission between the PUCCH and the PUSCH. In another example, the transmit power for simultaneous transmission between the uplink channel and the uplink signal may include transmit power for simultaneous transmission between the PUCCH / PUSCH and the SRS. As described above, the uplink channel or the uplink signal received by the base station constituting the dual connectivity from the mobile station is transmitted to the base station through the channel transmitted by the transmit power determined based on the uplink maximum transmit power of the cell group associated with the base station, Or signal. Or the uplink channel or the uplink signal is simultaneously transmitted, the transmission power of the corresponding uplink channel or signal may be determined preferentially by the maximum transmission power of the cell group associated with the corresponding base station. That is, the transmission power of an uplink channel or a signal is preferentially determined based on a maximum transmission power for a cell group associated with a base station, and then a transmission power remaining in a maximum transmission power for a cell group associated with another base station is allocated .

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

Referring to FIG. 13, a base station according to another exemplary embodiment of the present invention may further include transmitting concurrent transmission parameters for simultaneous transmission between uplink channels or an uplink channel and an uplink signal.

Specifically, the base station can configure dual connectivity for other base stations and terminals (S1310). The dual connectivity may be configured as a terminal with the structure of FIG. 9 or 10 as described in FIG.

Thereafter, the base station may include transmitting concurrent transmission parameters for simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal (S1320). The simultaneous transmission parameters may include information indicating that the UE simultaneously transmits uplink channels or uplink signals and uplink signals. In one example, the concurrent transmission parameters can be configured to have RRC parameters independently in each cell group. Contents related to the simultaneous transmission parameters will be described in detail in accordance with each embodiment below.

Then, the base station receives the uplink channel or the uplink signal from the terminal as in step S1220 described above (S1330). The uplink channel or the uplink signal is transmitted by a transmission power determined by the UE independently in a cell group including a serving cell associated with the corresponding base station.

Hereinafter, a multiplexing method and a transmission power control method for transmitting an uplink channel or an uplink signal in a dual connectivity situation will be specifically described with reference to respective embodiments. That is, the present invention proposes a multiplexing method for uplink channels and 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. In addition, the transmission power of the uplink channel and the uplink signal can be determined based on the uplink maximum transmission power determined in each cell group.

When the transmission power of the uplink channel or the uplink signal is independently applied in each cell group as described with reference to Equations 1 to 4, when the UE having the dual connectivity is configured to have different types of cell groups (for example, MCG , SCG), or uplink channels transmitted to different base stations (e.g., MeNB, SeNB) and signals, and RRC parameters independently. 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 an uplink channel and an uplink signal 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, as described with reference to FIGS. 10 to 13, the transmission power of an uplink signal or a channel can be determined using uplink maximum transmission power of each cell group. Specifically, the transmission power of an uplink signal or an uplink channel can be applied by changing P _CMAX to P _{CMAX and CG} in section 5.1.1.1 of TS document 36.213 as shown in the following table.

(PUCCH / PUSCH / PRACH) and a signal (SRS) in a situation 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.

FIG. 14 through FIG. 24 are diagrams for explaining respective embodiments of a method for transmitting an uplink signal or a channel by a terminal according to the present invention.

14 to 24, 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 over different cell groups together 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, when a UE having a different cell group transmits power (i.e., uplink channel / signal combination) transmitted in multiple PUCCH (s) / PUSCH / The following method can be applied to perform control or multiplexing.

When this method is applied, the following additional terminal operation is 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 multiple PUCCH configuration is set in the UE as shown in FIG. 14, 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. 15, 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. 16, if the UE PUCCH transmission in the subframe i of the serving cell of the MCG is part of the first symbol of the PUSCH transmission in the subframe i + 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.)
17, when a dual connectivity or a 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. 18 shows a case where SRS is transmitted in the MCG, and FIG. 19 shows a case where SRS is transmitted in the SCG.

on any overlapped portion of the symbol.)
18 and 19, in a situation where 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. 20 shows the case where the PRACH is transmitted in the MCG and the SRS is transmitted in the SCG. FIG. 21 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.)
20 and 21, 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 is transmitted 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.)
20 and 21, 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. 22 to 24, the UE can transmit PUCCH, PUSCH, and SRS in serving cells of different cell groups in a dual connectivity situation. Here, the transmission power allocation method of the present invention described with reference to FIGS. 14 to 21 can also be applied.

Referring to FIG. 22, 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.

23, 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 FIG. 24, a PUCCH may be transmitted in one cell of the MCG, and a 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.

INDUSTRIAL APPLICABILITY As described above, the present invention provides a concrete method of controlling the uplink transmission power when a UE transmits an uplink channel or a signal in a dual connectivity situation. In addition, the present invention provides a concrete transmission power allocation method and apparatus for simultaneously transmitting uplink signals in a dual connectivity situation. In addition, the present invention provides a method for simultaneously transmitting uplink channels and signals to each cell group in a dual connectivity situation, wherein independent transmission indicator setting for each cell group for simultaneous transmission of channels and signals transmitted to each cell group is performed A method and an apparatus for performing concurrent transmission of an uplink channel and a signal in different cell groups are provided.

In other words, carrier merging is performed using the carriers having the same or different TDD and FDD duplex modes when carrier merging (i.e., inter-base station carrier merging and dual connectivity support) between base stations having different base station types is performed , It is possible to solve the behavior of the terminal operating according to the setting of the PCell and the 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 and the uplink signal transmission, and the HARQ operation, Thereby ensuring reliability of the data transmission of the terminal. Through this, it is possible to increase the data rate of the uplink and the downlink.

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

25, a user terminal 2500 according to another embodiment of the present invention includes a receiver 2530, a controller 2510, and a transmitter 2520.

A UE 2500 according to another embodiment of the present invention includes a controller 2510 for determining an uplink maximum transmission power for each of a plurality of cell groups including at least one serving cell, And a transmitter 2520 that transmits the uplink channel and the uplink signal of each of the plurality of cell groups using the transmission power.

In addition, the controller 2510 may determine that the total sum of uplink maximum transmit powers for each of the plurality of cell groups is equal to or less than the total maximum transmit power of the UE. In addition, when determining the transmission power for the simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal, the control unit 2510 may use the uplink maximum transmission power for each of the plurality of cell groups, Can be determined independently from each other.

For example, the transmission power for simultaneous transmission between uplink channels may include transmission power for simultaneous transmission between a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH). As another example, the transmission power for simultaneous transmission between the uplink channel and the uplink signal includes the transmission power for simultaneous transmission between the Physical Uplink Control Channel (PUCCH) / Physical Uplink Shared Channel (PUSCH) and the SRS There is. As another example, the transmission power for transmission of the uplink channel and the uplink signal may be determined in advance among the plurality of cell groups, and then determined among the plurality of cell groups.

In addition, the controller 2510 may be configured to multiplex the uplink channels / signals in the serving cells under the same base station or between serving cells in different base stations in a situation where the dual connectivity required for performing the above-described present invention is configured. Thereby controlling the overall operation of the terminal.

The transmitter 2520 can transmit the uplink channel and the uplink signal using the transmission power for simultaneous transmission. Also, the transmitter 2520 transmits uplink control information, data, and a message to the base station through the corresponding channel.

The receiver 2530 receives downlink control information, data, and messages from 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 control unit 2620, a transmission unit 2630, and a reception unit 2610.

The base station 2600 of the present invention may include a control unit 2620 configured to establish dual connectivity with the UE and a receiver 2610 configured to receive the uplink channel and the uplink signal from the UE. Here, the uplink channel and the uplink signal may be transmitted based on the uplink maximum transmission power for a cell group including one or more cells provided by the base station. The uplink and uplink signals may be received in one subframe and may be based on transmission power for simultaneous transmission between uplink channels or uplink channels and independently determined within a cell group. Lt; / RTI &gt; Also, the transmission power for simultaneous transmission between the uplink channels includes the transmission power for simultaneous transmission between the PUCCH and the PUSCH, and the transmission power for the simultaneous transmission between the uplink channel and the uplink signal is transmitted between the PUCCH / PUSCH and the SRS Lt; / RTI &gt;

In addition, the control unit 2620 controls the UE to multiplex the uplink channels / signals in the serving cells under the same base station or among the serving cells in different base stations in a situation where the dual connectivity required for performing the above-described present invention is configured Thereby controlling the overall operation of the base station.

The transmitter 2630 may transmit the concurrent transmission parameters for the simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal.

In addition, the transmitting unit 2630 and the receiving unit 2610 are used to transmit and receive signals, messages, and data necessary for performing the above-described present invention.

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

Claims (18)

A method for controlling uplink transmission power of a UE,
Determining an uplink maximum transmit power for each of the plurality of cell groups such that a sum of uplink maximum transmit power for each of a plurality of cell groups including at least one serving cell is less than a total maximum transmit power of the terminal; And
And transmitting an uplink channel and an uplink signal of each of the plurality of cell groups using the uplink maximum transmission power of each of the plurality of cell groups,
Wherein the step of transmitting an uplink channel and an uplink signal of each of the plurality of cell groups comprises:
Determining transmission power for simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal on the basis of the determined uplink maximum transmission power of each of the plurality of cell groups independently in each of the plurality of cell groups ; And
Performing concurrent transmission between the uplink channels or between the uplink channel and the uplink signal using a transmission power determined in each of the plurality of cell groups. delete delete The method according to claim 1,
The transmission power for simultaneous transmission between the uplink channels may be expressed as:
A transmission power for simultaneous transmission between a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH)
Wherein the transmission power for the simultaneous transmission between the uplink channel and the uplink signal is &lt; RTI ID = 0.0 &gt;
And transmit power for simultaneous transmission between the PUCCH or PUSCH and a sounding reference signal (SRS). The method according to claim 1,
Wherein the transmission power for transmission of the uplink channel and the uplink signal is &lt; RTI ID = 0.0 &gt;
Wherein the plurality of cell groups are preferentially determined in each of the plurality of cell groups and then determined among the plurality of cell groups. 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 in one subframe from the UE,
Wherein the uplink channel and the uplink signal are transmitted to the plurality of cell groups so that the sum of uplink maximum transmit power for each of a plurality of cell groups including one or more cells provided by the base station is equal to or less than a total maximum transmit power of the UE. The uplink maximum transmission power for each of the plurality of cell groups is determined and the uplink maximum transmission power for each of the plurality of cell groups is determined based on the uplink maximum transmission power of each of the plurality of cell groups, Signal is transmitted based on the determined transmit power for simultaneous transmission of signals. delete The method according to claim 6,
The transmission power for simultaneous transmission between the uplink channels may be expressed as:
A transmission power for simultaneous transmission between a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH)
Wherein the transmission power for the simultaneous transmission between the uplink channel and the uplink signal is &lt; RTI ID = 0.0 &gt;
And transmit power for simultaneous transmission between the PUCCH or PUSCH and a sounding reference signal (SRS). The method according to claim 6,
And transmitting a simultaneous transmission parameter for simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal. A terminal for controlling uplink transmission power,
A controller for determining an uplink maximum transmit power for each of the plurality of cell groups so that a sum of uplink maximum transmit power for each of a plurality of cell groups including at least one serving cell is equal to or less than a total maximum transmit power of the terminal; And
And a transmitter for transmitting an uplink channel and an uplink signal of each of the plurality of cell groups using the uplink maximum transmission power of each of the plurality of cell groups,
Wherein,
Determining transmission power for simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal on the basis of the determined uplink maximum transmission power of each of the plurality of cell groups independently in each of the plurality of cell groups and,
The transmitter may further comprise:
And performs simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal using a transmission power determined in each of the plurality of cell groups. delete delete 11. The method of claim 10,
The transmission power for simultaneous transmission between the uplink channels may be expressed as:
A transmission power for simultaneous transmission between a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH)
Wherein the transmission power for the simultaneous transmission between the uplink channel and the uplink signal is &lt; RTI ID = 0.0 &gt;
And a transmit power for simultaneous transmission between the PUCCH or PUSCH and a sounding reference signal (SRS). 11. The method of claim 10,
Wherein the transmission power for transmission of the uplink channel and the uplink signal is &lt; RTI ID = 0.0 &gt;
Wherein the plurality of cell groups are preferentially determined in each of the plurality of cell groups and then determined among the plurality of cell groups. 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 in one subframe from the UE,
Wherein the uplink channel and the uplink signal are transmitted to the plurality of cell groups so that the sum of uplink maximum transmit power for each of a plurality of cell groups including one or more cells provided by the base station is equal to or less than a total maximum transmit power of the UE. The uplink maximum transmit power for each of the plurality of cell groups is determined and the uplink maximum transmit power for each of the plurality of cell groups is determined based on the determined uplink maximum transmit power of each of the plurality of cell groups, Link signal based on the determined transmit power for simultaneous transmission of the link signal. delete 16. The method of claim 15,
The transmission power for simultaneous transmission between the uplink channels may be expressed as:
A transmission power for simultaneous transmission between a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH)
Wherein the transmission power for the simultaneous transmission between the uplink channel and the uplink signal is &lt; RTI ID = 0.0 &gt;
And a transmit power for simultaneous transmission between the PUCCH or the PUSCH and the SRS. 16. The method of claim 15,
And a transmitter for transmitting concurrent transmission parameters for simultaneous transmission between the uplink channels or between the uplink channel and the uplink signal.

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