WO2015069013A1 - Method for controlling uplink transmission power and apparatus thereof - Google Patents

Abstract

The present invention relates to a method and an apparatus for controlling uplink transmission power. A method for controlling uplink transmission power by a terminal according to an embodiment of the present invention comprises the steps of: allocating transmission power of one or more uplink control channels and/or one or more uplink data channels in order to transmit the uplink control channels and/or the uplink data channels in two or more cells; and transmitting the uplink control channel and/or the uplink data channel to one or more base stations according to the allocated transmission power.

Description

Method and apparatus for controlling uplink transmission power

The present invention relates to a method and apparatus for controlling uplink transmission power, and more particularly, to a method and apparatus for allocating transmission power in transmitting uplink to two or more cells.

As communication systems have evolved, consumers, such as businesses and individuals, have used a wide variety of wireless terminals. Mobile communication systems such as LTE (Long Term Evolution) and LTE-Advanced of the current 3GPP series are high-speed and large-capacity communication systems that can transmit and receive various data such as video and wireless data out of voice-oriented services. The development of technology capable of transferring large amounts of data is required. Meanwhile, as deployments such as a plurality of cells or small cells are introduced, there is a need for a technique and a method for enabling carrier aggregation to be applicable in various deployment scenarios. In particular, when performing uplink transmission in a plurality of cells, a technique for controlling transmission power is required.

The present invention provides a technique for controlling the transmission power when the terminal performs uplink transmission to two or more cells and two or more base stations. In more detail, considering the transmission of Physical Uplink Control CHannel (PUCCH) in two or more cells, simultaneous transmission of PUCCH in different serving cells, and simultaneous transmission of PUCCH to different base stations, uplink transmission transmitted by the UE in uplink It provides a method and apparatus for controlling the power of the.

A method for controlling uplink transmission power by a terminal according to an embodiment of the present invention includes transmitting the uplink control channel and / or to transmit one or more uplink control channels and / or one or more uplink data channels in two or more cells. Allocating a transmission power of the uplink data channel, and transmitting the uplink control channel and / or the uplink data channel to one or more base stations according to the allocated transmission power.

According to another embodiment of the present invention, a method for controlling uplink transmission power of a terminal includes: transmitting, by the RRC configuration parameter, indication information indicating simultaneous transmission of uplink control information from two or more cells to the terminal; Receiving from the terminal at least one uplink control channel and / or at least one uplink data channel whose transmission power is controlled according to the indication information.

Terminal for controlling the uplink transmission power according to another embodiment of the present invention to receive a downlink from the base station, to transmit one or more uplink control channel and / or one or more uplink data channel in two or more cells A control unit for allocating transmission power of the uplink control channel and / or the uplink data channel, and a transmitter for transmitting the uplink control channel and / or the uplink data channel to one or more base stations according to the allocated transmission power. It includes.

The base station for controlling the uplink transmission power of the terminal according to another embodiment of the present invention, a transmitter for transmitting the indication information indicating the simultaneous transmission of the uplink control information in two or more cells to the terminal as an RRC configuration parameter, the indication And a receiver for receiving at least one uplink control channel and / or at least one uplink data channel whose transmission power is controlled according to the information from the terminal, and a controller for controlling the transmitter and the receiver.

When the present invention is implemented, transmission power may be controlled when uplink transmission is performed in two or more cells. In more detail, a method and apparatus for controlling the power of uplink transmission transmitted by the UE in uplink when considering simultaneous transmission of PUCCH and transmission of PUCCH in different serving cells from two or more cells to the same base station and different base stations To provide.

1 is a diagram illustrating small cell deployment according to an embodiment.

2 is a diagram illustrating a small cell deployment scenario.

3 to 6 show detailed scenarios in small cell deployment.

7 is a diagram illustrating various scenarios of carrier aggregation.

8 is a diagram illustrating a detailed method 1 according to an embodiment of the present invention.

9 is a diagram illustrating a detailed method 2 according to another embodiment of the present invention.

10 is a diagram illustrating a detailed method 3 according to another embodiment of the present invention.

11 is a diagram illustrating a detailed method A according to another embodiment of the present invention.

12 is a diagram illustrating a detailed method B according to another embodiment of the present invention.

13 is a view showing uplink transmission according to another embodiment of the present invention.

14 is a diagram illustrating a process of controlling power of uplink transmission in a terminal according to an embodiment of the present invention.

15 is a diagram illustrating a process of receiving an uplink signal transmitted by controlling transmission power at a base station according to an embodiment of the present invention.

16 is a diagram showing the configuration of a user terminal according to another embodiment of the present invention.

17 is a diagram illustrating a configuration of a base station according to another embodiment.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

The wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like. The wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB). In the present specification, a user terminal is a generic concept meaning a terminal in wireless communication. In addition, user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like. Hereinafter, in the present specification, the user terminal may be abbreviated as a terminal. In the following description, the user terminal may be referred to as a terminal for short.

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, an Sector, a Site, and a BTS. Other terms such as a base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell may be called.

In other words, in the present specification, a base station or a cell is a generic meaning indicating some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as, and it is meant to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, small cell communication range.

Since the various cells listed above have a base station for controlling each cell, the base station may be interpreted in two senses. i) the device providing the megacell, the macrocell, the microcell, the picocell, the femtocell, the small cell in relation to the wireless area, or ii) the wireless area itself. In i) all devices which provide a given wireless area are controlled by the same entity or interact with each other to cooperatively configure the wireless area to direct the base station. The eNB, RRH, antenna, RU, LPN, point, transmit / receive point, transmit point, receive point, and the like, according to the configuration of the radio region, become an embodiment of the base station. In ii), the base station may indicate the radio area itself to receive or transmit a signal from a viewpoint of a user terminal or a neighboring base station.

Therefore, megacells, macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmit / receive points, transmit points, and receive points are collectively referred to as base stations. do.

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

There is no limitation on the multiple access scheme applied to the wireless communication system. Various multiple access techniques 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-TDMA, OFDM-CDMA Can be used. One embodiment of the present invention can be applied to resource allocation in the fields of asynchronous wireless communication evolving to LTE and LTE-Advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB. The present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.

The uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.

In addition, in systems such as LTE and LTE-Advanced, a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers. The uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control CHannel (EPDCCH), and the like. Control information is transmitted through the same control channel, and data is configured by a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).

On the other hand, control information may also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).

In the present specification, a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.

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

The multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an eNB) and a high transmission power or a low transmission power in a macro cell region, which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.

In the present specification, the transmission power may mean a transmission power or a power value, and may be described by being represented by P, which means power.

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

Hereinafter, a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH may be expressed in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH.'

In addition, hereinafter, a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.

That is, the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.

In addition, for convenience of description, the EPDCCH, which is an embodiment of the present invention, may be applied to the portion described as the PDCCH, and the EPDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.

Meanwhile, high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.

An eNB, which is an embodiment of a base station, performs downlink transmission to terminals. The eNB includes downlink control information and uplink data channels (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required for reception of the PDSCH). For example, a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted. Hereinafter, the transmission and reception of signals through each channel will be described in the form of transmission and reception of the corresponding channel.

Small cells using low power nodes are being considered as a means to cope with the explosion of mobile traffic. Low power nodes represent nodes that use lower transmit (Tx) power than typical macro nodes.

Prior to 3GPP Release 11, carrier aggregation (called Carrier Aggregation, or "CA") technology was able to build small cells using low-power remote radio heads (RRHs), which are geographically dispersed antennas within macro cell coverage.

However, in order to apply the aforementioned carrier merging technique, the macro cell and the RRH cell are constructed to be scheduled under the control of one base station. For this purpose, an ideal backhaul is required between the macro cell node and the RRH.

An ideal backhaul means a backhaul that exhibits very high throughput and very low latency, such as optical fiber, dedicated point-to-point connections using LOS microwaves (Line Of Sight microwave).

In contrast, backhaul that exhibits relatively low throughput and large delay, such as digital subscriber line (xDSL) and Non LOS microwaves, is called non-ideal backhaul.

The plurality of serving cells may be merged through the single base station-based carrier merging technique described above to provide a service to the terminal. That is, a plurality of serving cells may be configured for a UE in a radio resource control (hereinafter referred to as 'RRC') CONNECTED state, and when an ideal backhaul is established between the macro cell node and the RRH, the macro cell And the RRH cell may be configured with serving cells to provide a service to the terminal.

When a carrier aggregation technique based on a single base station is configured, the terminal may have only one RRC connection with the network.

In an RRC connection establishment / reestablishment / handover, one serving cell is a Non-Access Stratum (hereinafter referred to as 'NAS') mobility information (e.g., TAI: Tracking Area Identity) and one serving cell provides security input in RRC connection reset / handover. Such a cell is called a primary cell (Pcell). The Pcell can only be changed with the handover procedure. Secondary Cells (Scells) may be configured as Serving Cells together with Pcells according to UE capabilities.

Hereinafter, the present invention provides a joint operation between FDD and TDD to a UE belonging to a corresponding base station when a small cell and an arbitrary cell / base station / RRH / antenna / RU support different duplexes, that is, FDD and TDD in a multi-layer cell structure. An operation method and apparatus of a terminal for enabling an operation), a base station method using the method, and an apparatus thereof are provided. Regardless of the duplex mode, each duplex mode is used in macro cell and small cell and any cell / base station / RRH / antenna / RU, and supports carrier merging and joint operation between macro cell and small cell and dual connectivity. In this case, the present invention relates to a method of designating a secondary cell.

In addition, the terminal may communicate with one or more cells or base stations, and the terminal may perform communication by grouping one or more cells. That is, communication can be performed in various forms. In this case, the above-described transmission power may mean transmission power for each of one or more cells or for each group or base station according to each communication type. In the following description, it is described as the total transmission power for convenience of understanding.

The following describes a small cell deployment scenario to which the proposals described in the present invention are applicable.

1 is a diagram illustrating small cell deployment according to an embodiment.

FIG. 1 illustrates a configuration in which a small cell and a macro cell coexist, and in FIGS. 2 to 3 below, whether macro coverage is present and whether the small cell is for outdoor or indoor. In order to determine whether the small cell is sparse or dense, the deployment of the small cell is divided in more detail according to whether or not to use the same frequency spectrum as the macro in terms of spectrum. The detailed configuration of the scenario will be described with reference to FIGS. 2 to 6.

2 is a diagram illustrating a small cell deployment scenario. FIG. 2 shows a typical representative configuration for the scenario of FIGS. 3 to 6. 2 illustrates a small cell deployment scenario and includes scenarios # 1, # 2a, # 2b and # 3. 200 denotes a macro cell, and 210 and 220 denote small cells. In FIG. 2, the overlapping macro cell may or may not exist. Coordination may be performed between the macro cell 200 and the small cells 210 and 220, and coordination may also be performed between the small cells 210 and 220. The overlapped areas of 200, 210, and 220 may be bundled into clusters.

3 to 6 show detailed scenarios in small cell deployment.

3 illustrates Scenario # 1 in small cell deployment. Scenario 1 is a co-channel deployment scenario of a small cell and a macro cell in the presence of an overhead macro and is an outdoor small cell scenario. 310 denotes a case where both the macro cell 311 and the small cell are outdoors, and 312 indicates a small cell cluster. Users are distributed both indoors and outdoors.

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 the small cell and the macro cell.

4 illustrates small cell deployment scenario # 2a. Scenario 2a is a deployment scenario in which the small cell and the macro use different frequency spectrums in the presence of an overlay macro and an outdoor small cell scenario. Both macro cell 411 and small cells are outdoors and 412 indicates a small cell cluster. Users are distributed both indoors and outdoors.

Solid lines connecting the small cells in the small cell 412 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 the small cell and the macro cell.

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

Solid lines connecting the small cells in the small cell 512 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 the small cell and the macro cell.

6 illustrates small cell deployment scenario # 3. Scenario 3 is an indoor small cell scenario in the absence of coverage of macros. 612 indicates a small cell cluster. In addition, small cells are all indoors, and users are distributed both indoors and outdoors.

Solid lines connecting the small cells in the small cell 612 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 the small cell and the macro cell.

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

7 is a diagram illustrating various scenarios of carrier aggregation.

As shown in FIG. 7, the corresponding F1 and F2 may be frequencies supporting the same duplex mode, or the frequencies supporting different duplex modes may be considered.

In 710, F1 and F2 cells are co-located and overlapped under almost the same coverage. Two layers are scenarios that provide sufficient coverage and mobility, and scenarios in which aggregation between overlapped F1 and F2 cells are possible.

720 is a scenario in which F1 and F2 cells co-locate and overlap, but the coverage of F2 is smaller than that of F1. F1 has sufficient coverage, mobility support is performed based on F1 coverage, and F2 is a scenario used for improving throughput, and a scenario in which overlapping F1 and F2 cells are merged is possible.

730 is a scenario in which F1 and F2 cells co-locate, but F2 antennas are directed to the cell edge to increase cell edge throughput. Mobility support is performed based on F1 coverage, where F1 has sufficient coverage but F2 is potentially a coverage hole, and F1 and F2 cells on the same eNB can be merged where coverage overlaps. That is the scenario.

Scenario 740 is a scenario in which F1 has macro coverage and RRH at F2 is used to improve throughput in hot spot area. Mobility support is performed based on F1 coverage and with F1 macro cell. This is a scenario in which F2 RRHs cells can be merged.

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

The physical uplink control channel (PUCCH) used as an uplink control channel is briefly mentioned. The uplink PUCCH is formatted according to the type of information sent from the terminal. The following is a description of the types of PUCCH formats and their uses.

Looking at the PUCCH structure as follows.

The PUCCH (Physical Uplink Control Channel) used as an uplink control channel is formatted according to the type of information sent from the terminal. The following describes the types of formats for PUCCH and their uses.

PUCCH format 1 is a channel format for transmitting only a scheduling request.

PUCCH format 1a / 1b is a channel for transmitting Ack / Nack for a scheduling request and / or downlink data channel and according to format number 1a / according to the number of bits of Ack / Nack and a modulation scheme. It is divided into 1b.

The shortened PUCCH format 1a / 1b is a format in which the last SC-FDMA symbol of one subframe is punctured in PUCCH format 1a / 1b transmitting A / N (Ack / Nack). Whether to use the format is determined by TRUE / FALSE of "ackNackSRS-SimultaneousTransmission", which is an RRC parameter indicated by an upper layer of the base station, and cell-specific information configuration of a sounding reference signal (SRS).

PUCCH format 2 is a channel format for transmitting only CQI.

PUCCH format 2a / 2b is a channel for transmitting "AQ / Nack for CQI + downlink data channel" and is divided into 2a / 2b according to the number of bits and modulation scheme of Ack / Nack.

PUCCH format 3 is a channel for transmitting Ack / Nack of 4 bits or more under downlink carrier aggregation.

Shortened PUCCH format 3 is a format in which the last SC-FDMA symbol of one subframe is punctured in PUCCH format 3 transmitting Ack / Nack. Whether to use the format is determined by TRUE / FALSE of "ackNackSRS-SimultaneousTransmission", which is an RRC parameter indicated by an upper layer of the base station, and the cell-specific information configuration of the SRS.

Hereinafter, power control between uplink transmission channels, between uplink channel and sounding reference signals, and between sounding reference signals under carrier aggregation considering a case of transmitting a PUCCH in one serving cell without considering multiple PUCCHs. As a method of the present invention, a case in which there is a power limited case of the terminal (power limited case) and a case in which there is a non-power limited case of the terminal will be described briefly.

The sum of the total transmission power of the terminal for the terminal configured for simultaneous transmission of PUCCH and PUSCH means the maximum transmission power according to each communication type. In case of exceeding, UE sets priority of power of PUCCH in determining transmission power of PUSCH for serving cell c, and scales transmission power of PUSCH to a value between 0 and 1 for the remaining transmission power. UE determines the transmit power of the corresponding PUSCH. Using Equation 1, the UE determines the transmit power of the corresponding PUSCH.

[Equation 1]

Here, the UE is in a situation such as subframe i of the serving cell c.

Is scaled according to Equation 1, wherein

silver

Is a linear value of, or a linear value of,

silver

Is the linear value of

Is the total configured maximum output power of the UE in subframe i

Is a linear value of. w (i) is for serving cell c

The scaling factor of

It has a value within the range of. If there is no PUCCH transmission in subframe i

Becomes

On the other hand, the sum of the total transmission power of the terminal

In case of exceeding, in determining transmission power between PUSCHs transmitted by different carriers or different serving cells, the UE has UCI according to whether information included in the corresponding PUSCH includes uplink control information (UCI). By assigning PUSCH transmission power to a serving cell or component carrier that transmits a PUSCH first, scaling is performed with the same scaling factor between the remaining serving cell (s) or component carriers. PUSCH transmit power is determined. Here, the scaling factor may be set to 0 for a specific serving cell (s) or component carrier. Using Equation 2 below, the UE determines the transmit power of the corresponding PUSCH.

[Equation 2]

When the UE transmits a PUSCH transmission with UCI (PUSCH) with the UCI in the serving cell j, and transmits the PUSCH without the UCI in another serving cell (PUSCH without UCI), the total transmission power of the UE is

In this case, the UE in subframe i transmitting the PUSCH without UCI

Is scaled to satisfy Equation 2.

here

Is the PUSCH transmission power during PUSCH transmission with UCI, and w (i) is for the serving cell c without UCI.

Is a scaling factor of. in this case,

And the total transmission power of the terminal

If not exceed

Do not apply power scaling for. here

Is set equal to a value greater than or equal to 0, and may have a value of 0 in a specific serving cell.

The sum of the total transmit power of the terminal

In case of exceeding the UE, the UE determines the transmission power of PUCCH + PUSCH with UCI transmitted from different carriers or different serving cells and PUSCHs without UCI. The transmission power of the PUSCH having the UCI is set to be guaranteed, and the PUSCH transmission power is determined by performing scaling with the same scaling factor between the remaining serving cell (s) or component carriers with respect to the transmission power of the remaining UEs. Here, the scaling factor may be set to 0 for a specific serving cell (s) or component carrier. Using Equation 3 below, the UE determines the transmit power of the corresponding PUSCH.

[Equation 3]

If the UE transmits PUCCH and PUSCH with UCI at the same time in serving cell j and transmits PUSCH without UCI in another serving cell, the total transmit power of the UE is

And may exceed, the terminal according to the equation (3)

Can be obtained.

The sum of all the transmit powers of the terminals

In case of exceeding, when the UE determines transmission power between SRSs transmitted from different carriers or different serving cells, the UE performs scaling with the same scaling factor among the serving cell (s) or component carriers to reduce the transmission power of the SRS. Will be decided. Using Equation 4 below, the UE determines transmission power of corresponding SRSs.

[Equation 4]

Here, the sum of the total transmit powers that the UE transmits SRS

In case of exceeding the UE, the UE is associated with subframe I and serving cell c.

Is scaled using Equation 5 as follows.

[Equation 5]

here

Is

Is the linear value of the value,

Is defined in subframe i

Is a linear value of.

Of the serving cell c

Is the scaling factor of

Satisfies.

Has the same value in the serving cells.

According to the related art, when a terminal simultaneously transmits uplink data, a control channel, and an uplink signal to a base station under carrier aggregation, one serving cell, that is, a primary serving cell (hereinafter, referred to as 'PCell') is transmitted to the base station. Only PUCCH transmission is considered, and transmission of PUCCH in a serving cell other than the PCell is not considered. Therefore, when PUCCH transmission is considered in a serving cell other than the PCell, that is, when the PUCCH is transmitted in the Pcell and the other serving cell and the simultaneous transmission of the PUCCH in different serving cells, the multiplexing method between uplink channels or Power control methods need to be newly defined and applied. That is, ambiguity occurs when the terminal transmits the uplink data, the control channel, and the uplink signal to the base station, so that both the base station and the terminal cannot know how the operation of the terminal is performed according to the current technology. Therefore, in the case where multiple PUCCHs are configured, multiplexing methods and power control methods for uplink data and control channels and uplink signals transmitted by the UE need to be newly defined.

According to the present invention, when PUCCH transmission in a serving cell other than the PCell is considered under a small cell environment and TDD-FDD carrier aggregation, that is, the PUCCH transmission in a serving cell different from the Pcell and in a different serving cell Considering simultaneous transmission of PUCCH, multiplexing method and transmission power control method for multiple PUCCH (s) transmitted from uplink by UE, multiplexing method and power control for simultaneous transmission of multiple PUCCH (s) and PUSCH, and multiplexing The present invention relates to a multiplexing method for simultaneous transmission of a PUCCH (s) and multiple PUSCHs, a transmission power control method, and an apparatus thereof.

According to the present invention, when a PUCCH transmission in a serving cell other than a PCell is considered under a small cell environment and TDD-FDD carrier aggregation, that is, a base station configures transmission of multiple PUCCHs to different serving cells to a UE, or PUCCH to Scell When configured to transmit, the multiplexing method and transmission power control method for the multiple PUCCH (s) transmitted by the UE in the uplink, the multiplexing method and power control for the simultaneous transmission of the multiple PUCCH (s) and PUSCH, and multiple PUCCH The present invention relates to a multiplexing method, simultaneous transmission power control method, and apparatus for simultaneous transmission of multiple PUSCHs.

When the base station configures transmission of multiple PUCCHs to different serving cells to the UE or transmits PUCCHs to Scells, the method for each configuration is semi-statically through a new RRC parameter. There may be a method for configuring transmission of multiple PUCCH or transmission of PUCCH (PUCCH on SCell) in SCell. The method through the RRC parameter will be described in detail method C.

When the base station is configured and configured to transmit multiple PUCCHs to different serving cells or PUCCHs on Scells to the UE, simultaneous transmission of PUCCHs to different serving cells may be possible. Therefore, a multiplexing method and a power control method of PUCCHs simultaneously transmitted to different serving cells are proposed below.

A power control method between multiple PUCCHs will be described.

Power limited case, detailed method 1, 2, 3 when the total transmit power exceeds the maximum allowable transmit power (P_CMAX) of the UE in the overlapping part of the symbol transmitting PUCCHs transmitted on other cells Can be applied.

Detailed Method 1) A transmission power of PUCCHs transmitted on different cells may have a same scaling value, and a method of setting transmission power of PUCCHs transmitted in each cell may be considered. As one embodiment, the following Equation 6 may be used to perform transmission power control on different PUCCHs transmitted to the serving cell c in the i-th subframe.

[Equation 6]

Detailed Method 1 is a method of applying the same scaling value to the transmit power of the PUCCH transmitted in each cell.

Detailed Method 2) Since the transmission of the PUCCH may be concentrated in a specific PCell, a method of prioritizing the transmission power of the PUCCH for the specific PCell may be considered. This may be considered as a method of prioritizing the transmission power of a PCell, which is a specific cell among cells configured to the terminal, when the terminal transmits a PUCCH to each base station as an uplink control channel for downlink transmission transmitted from each base station. .

Alternatively, as a method of prioritizing transmission power for a specific cell, a method of prioritizing transmission power of a PUCCH in a serving cell in which PUCCH transmission as a feedback channel for different serving cells is concentrated may be considered. That is, when it is said that PUCCH is transmitted on two different cells, the PUCCH transmitted to a specific cell may be configured to transmit HARQ-ACK and / or CSI and / or SR (UCI) for multiple cells. A method of prioritizing transmission power setting for a PUCCH. In other words, the power control is performed by determining the priority of power setting for the PUCCHs transmitted to different serving cells depending on the number of serving cells included in the UCIs transmitted to the PUCCHs transmitted to a specific serving cell.

As an example, PUCCH transmitted in the i-th subframe of the serving cell c, i.e., the PCell, to the UE is given priority over PUCCH transmitted to the other serving cell j using Equation 7 as follows. Transmit power control for each of the two cells, and the number of serving cells included in the UCI transmitted to the PUCCH transmitted to the serving cell c in the i-th subframe is transmitted to the PUCCH transmitted to the serving cell j. Compared to the number of serving cells included in the UCI, it may be configured to perform transmission power control on different PUCCHs in many cases.

[Equation 7]

When the number of serving cells included in the UCI is the same, equal power scaling may be performed using the same scaling value between PUCCHs as in the detailed method 1). Or, give priority to the type of feedback included in the UCI, for example, HARQ-ACK or SR> RI> PMI or CQI, HARQ-ACK> SR> RI> PMI or CQI, and SR> HARQ-ACK> RI> The power control may be configured to determine the priority of the transmission power control for the PUCCHs transmitted to the serving cell c and the serving cell j according to priority such as PMI or CQI.

Detailed Method 2 is to set the priority of the power in the case of a specific PCell configured to the terminal in allocating the transmission power of the multiple PUCCH, if the number of serving cells containing the UCI is a high priority to set the transmission power of the serving cell In this scheme, the transmission power is given priority by setting the feedback type included in the UCI.

Detailed Method 3) Since HARQ-ACK may be the most important information among UCIs transmitted on the PUCCH, it is similar to determining the power control priority of the PUCCH depending on the number of serving cells included in the UCI described in Detailed Method 2). In this regard, a method of prioritizing the transmission power of the PUCCH may be considered depending on the number of HARQ-ACKs to which HARQ-ACKs should be delivered. Since a PUCCH transmitted to a specific cell may be configured to transmit HARQ-ACKs for multiple cells, this is a method of prioritizing transmission power setting for the corresponding PUCCH. In other words, a method of controlling power by prioritizing power settings for PUCCHs transmitted to different serving cells depending on the number of serving cells including HARQ-ACK transmitted on the PUCCH of a specific serving cell.

As one embodiment, the number of serving cells included in the HARQ-ACK transmitted to the PUCCH of the serving cell c in the i-th subframe is expressed by Equation 8 as below, and the HARQ-ACK transmitted to the PUCCH of the serving cell j is included. Compared to the number of serving cells, transmission power control for different PUCCHs may be performed in many cases.

[Equation 8]

When the number of serving cells included in the HARQ-ACK is the same, the same power scaling may be performed using the same scaling value between the PUCCHs as in the detailed method 1), or the PUCCH as in the detailed method 2). Among these, the PUCCH transmitted to the PCell may be set to perform transmission power control, or priority may be given to the type of feedback of the UCI that may be transmitted simultaneously with the HARQ-ACK. For example, SR> RI> The power control may be configured to determine the priority of the transmission power control for the PUCCHs transmitted to the serving cell c and the serving cell j according to priority such as PMI or CQI.

Detailed Method 3 is a method of prioritizing power setting so that transmission power is concentrated when the number of serving cells including HARQ-ACK is large.

In the case of multiple PUCCH, the transmission power is scaled equally as described in the detailed method 1, or, in the case of the specific PCell configured in the terminal as described in the detailed method 2, the power is prioritized or the number of serving cells including the UCI. In many cases, the transmission power of the serving cell is given priority or the transmission power is given priority by giving priority to the type of feedback included in the UCI, or as described in the detailed method 3 including HARQ-ACK. When the number of serving cells is large, the method of prioritizing power setting has been described.

8 is a diagram illustrating a detailed method 1 according to an embodiment of the present invention.

In two cells CC0 and CC1, PUCCH is transmitted. Here, there are a Pcell indicated by 810 and an Scell indicated by 820. When applying Method 1, the same scaling value may be applied to transmission of these PUCCHs. That is, the scaling values applied when the PUCCHs of CC0 and CC1 of FIG. 8 are transmitted are the same.

9 is a diagram illustrating a detailed method 2 according to another embodiment of the present invention.

In two cells CC0 and CC1, PUCCH is transmitted. Here, when the Pcell indicated by 910 and the Scell indicated by 920 are configured for the UE, when the method 2 is applied, the specific PCell configured for the UE during transmission of these PUCCHs may be set to give priority to power. In this case, transmission power control may be set by allocating PUCCH transmission power transmitted to the 910, that is, the PCell, and allocating the remaining transmission power to the 920, that is, the SCell.

Consider the case where both CC0 and CC1 contain UCI. In the PUCCH indicated by 930, the number of serving cells including UCI is two, and in the PUCCH indicated by 940, the number of serving cells including UCI is one. In this case, detailed method 2 can be applied. The power of the PUCCH indicated by the 930 having a larger number of serving cells included in the UCI may be preferentially set.

If the number of serving cells included in the UCI is the same, the same power scaling may be performed by using the same scaling value, or the transmission power of a specific PCell may be prioritized, or as described above. Priority may be determined according to the type of feedback included in the UCI.

10 is a diagram illustrating a detailed method 3 according to another embodiment of the present invention.

In two cells CC0 and CC1, a PUCCH including HARQ-ACK is transmitted. Here, the number of serving cells included in the HARQ-ACK is 2 in CC0 indicated by 1010, and the number of serving cells included in the HARQ-ACK is 1 in CC1 indicated by 1020. In this case, when applying the detailed method 3, the number of serving cells included in the HARQ-ACK may be preferentially set to the power of the PUCCH of CC0.

If the number of serving cells included in HARQ-ACK is the same in the application process of detailed method 3, scaling may be performed identically by applying detailed method 1, or specific PCell configured to the terminal by applying detailed method 2 In the case of power, the priority is set, or if the number of serving cells including UCI is large, the transmission power of the serving cell is set in priority, or the transmission power is given priority by giving priority to the type of feedback included in the UCI. Can be set.

Next, a power control method between multiple PUCCHs and one or multiple PUSCHs will be described.

Detailed method when the total transmit power exceeds the maximum allowable transmit power (P_CMAX) of the UE in an overlapping portion of a symbol transmitting PUCCHs and a symbol transmitting PUSCH in a power limited case A and B can be applied.

Detailed Method A) A transmission power of PUSCHs transmitted on different cells may have a same scaling value, and a method of setting transmission power of a PUSCH transmitted in each cell may be considered. As one embodiment, the following formula may be used to perform transmission power control on different PUSCHs transmitted to the serving cell c in the i-th subframe. That is, the transmission powers of the PUSCHs transmitted on the cells for the remaining transmission powers other than the transmission powers allocated for the multiple PUCCHs in the maximum transmission power of the terminal are set with the same scaling value to set the transmission power.

The UE for the serving cell c in the i-th subframe

Scaling is performed such that the condition of Equation 9 below is satisfied.

[Equation 9]

here

In the i subframe

Is the linear value of,

In the i subframe

Is the linear value of,

Is the maximum output power in the i-th subframe configured in the terminal

Is a linear value of. And, W _c (i) is for the serving cell c

Is a scaling factor of, and the range is

Same as And Z _c (i) is for serving cell c

Is the scaling factor of,

Same as If there is no transmission of the PUCCH on the i-th subframe

to be.

Detailed Method A is an example of applying scaling to all transmission powers of a PUSCH.

Detailed Method B) When there is a PUSCH including UCI among PUSCHs transmitted on different cells, it is set to ensure detection probability and reliability of UCI transmitted as a feedback channel for DL transmission. For this purpose, a method of preferentially allocating the power of the PUSCH to which the UCI is transmitted compared to the PUSCH not including the UCI may be considered.

As one embodiment, the following formula may be used to perform transmission power control on different PUSCHs transmitted to the serving cell c and the serving cell j in the i-th subframe. If the UE transmits multiple PUCCHs and transmits one or multiple PUSCHs, the PUSCH transmitted to the serving cell j includes the UCI, and the PUSCH is transmitted without the UCI in the other serving cells. In this case, the transmit power of the PUSCH for the serving cell c in the i-th subframe using Equation 10 below,

Allows you to set a value.

[Equation 10]

here

In the i subframe

Is the linear value of

Is the i-th subframe of the serving cell c

Is the linear value of,

Is the transmission power of the PUSCH including the UCI transmitted to the serving cell j.

Is a linear value of. And,

Is the maximum output power in the i-th subframe configured in the terminal

Is a linear value of. And, W _c (i) is for the serving cell c

Is the scaling factor of,

Same as And Z _c (i) is for serving cell c

Is the scaling factor of,

Same as If there is no transmission of the PUCCH on the i-th subframe

to be.

In the detailed method C, the terminal and the base station can share the indication information indicating simultaneous transmission of uplink control information in two or more cells as an RRC configuration parameter. This may be optionally performed, and the base station may be instructed or preconfigured by the base station in a manner other than the RRC configuration parameter.

In detail, the method D may be set to Pcell / Scell or vice versa for the first cell and the second cell, respectively, in which the master base station is the first cell and the second base station is the second cell. The case where the control and the second cell is divided into a case where the master base station controls the first cell and the secondary base station controls, and such information may be set to be shared between the base station and the terminal.

11 is a diagram illustrating a detailed method A according to another embodiment of the present invention.

In FIG. 11, among the cells of the MeNB, the PUCCH is transmitted in CC0 (1110), and the PUSCH is transmitted in CC1 (1120). Meanwhile, the PUCCH is transmitted in the cell CCx of the SeNB (1130). Here, CCx becomes CC0 when the cell index of the SeNB is set independently of the MeNB, and CC2 when the cell index is set in association with the MeNB.

In this case, when the detailed method A is applied to each PUSCH transmitted in each cell, the same scaling value is applied. That is, W _c (i) of Equation 9 has the same value of W ₀ (i) of CC0, W ₁ (i) of CC1, and Wx (i) of CCx. However, in the case of CC0, since the PUCCH is transmitted, the transmit power of the PUCCH is first assigned, and then the transmit power of the PUSCH is allocated.

12 is a diagram illustrating a detailed method B according to another embodiment of the present invention.

Detailed Method B is a method of first allocating transmission power of a PUSCH including control information UCI when transmitting a data channel including uplink control information and a data channel not including control information to different base stations. In FIG. 12, CC0 is a PUSCH including UCI transmitted to SeNB (1210), and CCx is a PUSCH not including UCI transmitted to SeNB (1220). Therefore, in the case of applying Equation 10 in allocating the transmit power of the PUSCH, the remaining transmit power for the PUSCH 1220 transmitted to the remaining SeNB after allocating the transmit power of the PUSCH transmitted to the MeNB including the UCI of CC0. Allocate

13 is a view showing uplink transmission according to another embodiment of the present invention.

Here, CCx becomes CC0 when the cell index of the SeNB is set independently of the MeNB, and CC2 when the cell index is set in association with the MeNB.

1310 shows a case where a PUCCH is transmitted. And PUCCH is transmitted in MeNB and SeNB. Since a plurality of PUCCHs are transmitted in a plurality of cells, one of detailed methods 1, 2, and 3 may be selected. That is, detailed method 1 for setting the same scaling value for each PUCCH is applied, or detailed method 2, that is, a method of setting priority of power in the case of a specific PCell configured in the terminal, or a large number of serving cells including UCI. In this case, detailed method 2 suggesting a method of setting the transmission power of the corresponding serving cell with priority or a method of setting the transmission power with priority by giving priority to the type of feedback included in the UCI can be applied. Meanwhile, when all UCIs are included on the PUCCHs of CC0 and CCx, detailed method 3 of setting transmit power of the PUCCH may be applied depending on the number of HARQ-ACKs in the UCI.

In 1320, a PUCCH is transmitted to CC0 and a PUSCH including UCI is transmitted in CCx. In this case, detailed method B may be applied. After allocating the transmit power associated with the PUCCH of CC0, the transmit power of the PUSCH of CCx is preferentially assigned to the PUSCH of CC0 and CC1.

1330 may also apply method B. In detail method B, transmit power is first allocated to CC0 and CCx including UCI. Priority between CC0 and CCx including the UCI may be determined in consideration of the priorities of the PCell, the number of UCIs, or the number of HARQ-ACKs included in the UCI, as described in detail methods 2 and 3 above.

In the above-described methods, two or more different CCs that can be transmitted in the uplink in the operation of the terminal are configured, and multiple TAGs are not configured in the terminal and multiple TAGs are configured in the terminal. If so, they can all be considered as applicable. In addition, the operation of the terminal is defined when the transmission situation of the terminal is each power limited, that is, when the total transmission power exceeds the maximum allowable transmission power (P_CMAX) of the terminal. This is to set power control or dropping for a specific channel and signal in transmission of an uplink control channel or an uplink data channel. It can be considered as a way to ensure maximum transmission. This may be a method of preventing excessive data control of the uplink control channel and the data channel, thereby preventing deterioration of the data rate for the data channel during carrier aggregation.

The contents proposed in the present invention may be considered even when performing dual connectivity in consideration of the small cell. In other words. It can be applied to the following scenarios.

In the present specification, when the terminal configures dual connectivity, forms an RRC connection with the terminal, terminates the base station or S1-MME providing a cell (for example, Pcell) that is the basis of handover, and mobility to the core network. A base station serving as an anchor is described as a master base station or a first base station. The master base station or the first base station may be a base station providing a macro cell, and may be a base station providing any one small cell in a dual connectivity situation between the small cells.

Meanwhile, a base station that is distinguished from a master base station in a dual connectivity environment and provides additional radio resources to a terminal is described as a secondary base station or a second base station.

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

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

In the present invention, the macro cell may mean each of at least one or more cells, and may be described as representing a whole cell associated with the first base station. In addition, the small cell may also mean each of at least one or more cells, and may also be described as representing a whole cell associated with the second base station. However, as described above, in a specific scenario such as a small cell cluster, the cell may be a cell associated with the first base station. In this case, the cell of the second base station may be described as another small cell or another small cell.

However, in the following embodiments, for convenience of explanation, the macro cell may be associated with the master base station or the first base station, and the small cell may be associated with the secondary base station or the second base station, but the present invention is not limited thereto. A base station or a second base station may be associated with the macro cell, and the present invention also applies to a situation where the master base station or the first base station is associated with the small cell.

Since there may be a case in which transmission to a single base station and uplink transmission to different base stations are configured, a method of informing the UE of the configuration may be considered. That is, by setting an RRC configuration parameter such as "simultaneous UL transmission to both MeNB and SeNB", the above-described operation and power control method of the terminal can be applied. A method of configuring various types of RRC parameters other than UL transmission in “simultaneous UL transmission to both MeNB and SeNB” may be considered. That is, instead of uplink transmission, UCI transmission (UCI transmission), HARQ-ACK transmission, CQI transmission, SR transmission, HARQ-ACK and CQI transmission, HARQ-ACK and SR transmission, SR and CQI transmission, SRS transmission, HARQ-ACK and SRS There may be a transmission and a method of configuring CQI and SRS transmission. Each meaning may mean simultaneous transmission of each uplink channel and reference signal to different base stations from the terminal's point of view.

In the case where uplink transmission to different base stations is configured, whether information is to be transmitted to the first base station (master base station or macro base station), which is a different base station type, or information to be transmitted to a second base station (master base station or macro base station). Accordingly, the power control method proposed in the present invention may be considered. That is, the master base station or the macro base station that establishes the RRC connection, which is the first base station, may be considered to have great importance. The power control method proposed in the present invention, which allocates power to the uplink control channel transmitted to the second base station with priority, may be considered. In addition, the power control according to the priority of the UCI type transmitted in the uplink in combination with this. For example, the power control method proposed in the present invention may be considered according to HARQ-ACK> = SR> CQI. That is, although the present invention has been described as PCell and Scell, the PCell may be considered as a cell belonging to the first base station, and the Scell may be considered as a cell belonging to the second base station. PUCCH is a channel capable of transmitting HARQ-ACK, SR, and CQI, and in the case of PUSCH with UCI including UCI, it is a channel capable of transmitting HARQ-ACK, RI, CQI, PMI, and the like. When the transmission is prioritized, when transmitting to different base stations, a method of setting power prior to performing power control over PUCCH transmitting CQI may be considered to transmit PUSCH having HARQ-ACK.

Hereinafter, when PUCCH transmission in a non-PCell serving cell is considered under a small cell environment and TDD-FDD carrier aggregation, that is, transmission of PUCCH in a Pcell and another serving cell and simultaneous transmission of PUCCH in different serving cells will be considered. In this case, a power control method for transmitting multiple PUCCHs and PUSCHs according to multiple PUCCH (s) transmitted from the UE by uplink and an apparatus for implementing the same will be described.

14 is a diagram illustrating a process of controlling power of uplink transmission in a terminal according to an embodiment of the present invention.

The terminal performs uplink transmission to two or more cells.

First, as described in detail method C, the terminal receives, as an RRC configuration parameter, indication information indicating uplink simultaneous transmission in the two or more cells from the base station (S1410). This may optionally be done and may be indicated or preset in other ways than the RRC configuration parameters.

Next, when simultaneous transmission is set according to the indication information, the transmission power of the uplink control channel and the data channel is controlled. That is, in order to transmit one or more uplink control channels and / or one or more uplink data channels in two or more cells, transmission powers of the uplink control channel and / or the uplink data channel are allocated (S1420). The transmission power allocation scheme is variously applied according to the prioritization and scaling of the transmission power, and has been described in detail methods 1, 2, 3, and A, B, and D. In detail 1, the transmission power of the PUCCH of each cell is scaled. In the case of the detailed methods 2 and 3, the transmission power of the power allocation according to the type or number of UCI so that the transmission power is allocated preferentially according to the PCell priority and the type or number of UCI included in the uplink control channel or the uplink data channel. Priorities can be applied. The UCI type in the present specification may mean a UCI type.

Meanwhile, in the detailed method A, when the UE transmits the PUSCH in the plurality of cells, the UE transmits the two or more PUSCHs scheduled to be transmitted for the remaining power except the transmit power of the PUCCH transmitted in the plurality of cells. In setting the power, transmit power control may be performed by applying the same scaling value.

Next, in applying the detailed method B, when the UCI is included in the PUSCH, the transmission power may be allocated in preference to the PUSCH of another cell. That is, when the uplink data channel to be transmitted in the first cell includes UCI in a situation in which the first cell and the second cell are configured, the terminal transmits the transmission power of the uplink data channel to the uplink data channel to be transmitted in the second cell. Assign first.

As described in detail method D, Pcell / Scell or vice versa Scell / Pcell may be set for the first cell and the second cell, respectively, in which the master base station controls the first cell and the secondary base station controls the second cell. The case may be divided into the case where the master base station controls the second cell and the case where the secondary base station controls the first cell.

When the allocation of the transmission power is completed according to various schemes, the terminal transmits the uplink control channel and / or the uplink data channel to one or more base stations according to the allocated transmission power (S1430).

15 is a diagram illustrating a process of receiving an uplink signal transmitted by controlling transmission power at a base station according to an embodiment of the present invention.

The base station may transmit information indicating this to the terminal so that the terminal can perform uplink transmission in two or more cells. In one embodiment of the indicating information may be an RRC configuration parameter. In more detail, the base station transmits, to the terminal, indication information indicating simultaneous transmission of uplink control information in two or more cells as an RRC configuration parameter (S1510), in which uplink simultaneous transmission as well as UCI transmission (UCI transmission) are performed. To configure HARQ-ACK transmission, CQI transmission, SR transmission, HARQ-ACK and CQI transmission, HARQ-ACK and SR transmission, SR and CQI transmission, SRS transmission, HARQ-ACK and SRS transmission, and CQI and SRS transmission can do.

The base station receives one or more uplink control channels and / or one or more uplink data channels whose transmission power is controlled according to the indication information from the terminal (S1520). The control method of the transmission power has been described in detail methods 1, 2, 3 and detailed methods A, B, and D.

In detail method 1, the transmission power of the PUCCH of each cell is scaled equally. In the case of detailed methods 2 and 3, the type or number of UCIs are applied so that the transmission power is preferentially allocated according to a specific PCell priority and the type or number of UCIs included in the uplink control channel or the uplink data channel. The transmission power can be controlled.

Meanwhile, in the detailed method A, in the detailed method A, in transmitting a PUSCH in a plurality of cells, at least two signals scheduled to be transmitted for the remaining power except for the transmit power of the PUCCH transmitted in the plurality of cells are transmitted. In setting the transmission power of the PUSCH transmission, the same scaling value may be applied to perform transmission power control.

Next, in applying the detailed method B, when the UCI is included in the PUSCH, the transmission power may be allocated in preference to the PUSCH of another cell. That is, when the uplink data channel to be transmitted in the first cell includes UCI in a situation in which the first cell and the second cell are configured, the terminal transmits the transmission power of the uplink data channel to the uplink data channel to be transmitted in the second cell. It is assigned first.

As described in detail method D, Pcell / Scell or vice versa Scell / Pcell may be set for the first cell and the second cell, respectively, in which the master base station controls the first cell and the secondary base station controls the second cell. The case may be divided into the case where the master base station controls the second cell and the case where the secondary base station controls the first cell.

16 is a diagram showing the configuration of a user terminal according to another embodiment of the present invention.

Referring to FIG. 16, a user terminal 1600 according to another embodiment includes a receiver 1630, a controller 1610, and a transmitter 1620.

The receiver 1630 receives downlink control information, data, and a message from a base station through a corresponding channel.

In addition, the controller 1610 may consider the PUCCH transmission in a serving cell other than the PCell under the small cell environment and the TDD-FDD carrier aggregation necessary for carrying out the above-described present invention, that is, the PUCCH in the serving cell different from the Pcell. In consideration of simultaneous transmission of PUCCH in different serving cells, the overall UE operation is controlled according to power control for transmission of multiple PUCCH and PUSCH according to multiple PUCCH (s) transmitted from uplink by the UE.

The transmitter 1620 transmits uplink control information, data, and a message to a base station through a corresponding channel.

Looking in more detail as follows.

The receiver 1630 receives the downlink from the base station. The controller 1610 allocates transmission power of the uplink control channel and / or the uplink data channel to transmit at least one uplink control channel and / or at least one uplink data channel in two or more cells. The transmitter 1620 transmits the uplink control channel and / or the uplink data channel to one or more base stations according to the allocated transmission power.

In the case of detailed method 1, the controller 1610 may scale the transmit power of the PUCCH of each cell. In the case of detailed methods 2 and 3, the controller 1610 is configured to preferentially allocate transmission power according to the type or number of UCIs included in the uplink control channel or the uplink data channel. Transmission power may be allocated by applying the type or number of UCIs included in the link data channel.

In method A, the control unit 1610 is configured to scale the transmit power of the uplink control channel transmitted from the first cell to the transmit power of the uplink data channel in the first cell. The uplink data channel transmit power of the first cell may be allocated within a value excluding a value scaled by a factor.

Next, referring to method B, when the uplink data channel to be transmitted in the first cell includes the UCI, the controller 1610 prioritizes the transmission power of the uplink data channel to the uplink data channel to be transmitted in the second cell. Assign. That is, when the uplink data channel to be transmitted in the first cell includes UCI in a situation consisting of the first cell and the second cell, the transmission power of the uplink data channel is allocated in preference to the uplink data channel to be transmitted in the second cell. do.

As described in detail method C, the receiver 1610 may receive, from the base station, indication information indicating uplink simultaneous transmission in the two or more cells as an RRC configuration parameter. This may optionally be done and may be indicated or preset in other ways than the RRC configuration parameters.

As described in detail method D, Pcell / Scell or vice versa Scell / Pcell may be set for the first cell and the second cell, respectively, in which the master base station controls the first cell and the secondary base station controls the second cell. The case may be divided into the case where the master base station controls the second cell and the case where the secondary base station controls the first cell.

17 is a diagram illustrating a configuration of a base station according to another embodiment.

Referring to FIG. 17, a base station 1700 according to another embodiment includes a controller 1710, a transmitter 1720, and a receiver 1730.

When the PUCCH transmission in the serving cell other than the PCell is considered under the small cell environment and the TDD-FDD carrier aggregation necessary for carrying out the above-described present invention, that is, the control unit 1710 transmits the PUCCH in the serving cell different from the Pcell. And considering the simultaneous transmission of the PUCCH in different serving cells, and controls the overall operation of the base station according to the power control for the transmission of multiple PUCCH and PUSCH according to the multiple PUCCH (s) transmitted from the terminal to the uplink.

The transmitter 1720 and the receiver 1730 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.

In more detail, the transmitter 1720 transmits, to the UE, indication information indicating simultaneous transmission of uplink control information in two or more cells, as an RRC configuration parameter. In one embodiment of the indicating information may be an RRC configuration parameter. In more detail, the base station transmits, to the terminal, indication information indicating uplink simultaneous transmission in two or more cells as an RRC configuration parameter (S1510), in which not only uplink simultaneous transmission but also UCI transmission (UCI transmission) and HARQ- It can be instructed to configure ACK transmission, CQI transmission, SR transmission, HARQ-ACK and CQI transmission, HARQ-ACK and SR transmission, SR and CQI transmission, SRS transmission, HARQ-ACK and SRS transmission, and CQI and SRS transmission. .

The receiver 1730 receives at least one physical uplink control channel and / or at least one physical uplink shared channel from which the transmission power is controlled according to the indication information.

The controller 1710 controls the transmitter 1720 and the receiver 1730.

The control method of the transmission power has been described in detail methods 1, 2, 3 and detailed methods A, B, and D.

In detail 1, the transmission power of the PUCCH of each cell is scaled. In detail methods 2 and 3, the transmission power is applied to the type or number of UCIs so that the transmission power is preferentially allocated according to the type or number of UCIs included in the uplink control channel or the uplink data channel. This can be controlled.

In method A, when a UE transmits a PUSCH in a plurality of cells, a scaling value for a PUSCH of a first cell may be applied. That is, the transmission power of the uplink data channel in the first cell is a value obtained by scaling the transmission power of the uplink control channel transmitted in the first cell to the scaling factor of the first cell in the total transmission power. It can be within the value excluded.

Next, in applying the detailed method B, when the UCI is included in the PUSCH, the transmission power may be allocated in preference to the PUSCH of another cell. That is, when the uplink data channel to be transmitted in the first cell includes UCI, the uplink data channel may be allocated the transmission power in preference to the uplink data channel to be transmitted in the second cell.

As described in detail method D, Pcell / Scell or vice versa Scell / Pcell may be set for the first cell and the second cell, respectively, in which the master base station controls the first cell and the secondary base station controls the second cell. The case may be divided into the case where the master base station controls the second cell and the case where the secondary base station controls the first cell.

Until now, in a small cell environment and in a TDD-FDD carrier aggregation, a multiplexing method and a transmission power control method for multiple PUCCHs transmitted from an MS to an uplink, a multiplexing method for simultaneous transmission of multiple control channels and a PUSCH, and Power control, a multiplexing method for simultaneous transmission of multiple control channels and multiple PUSCHs, a transmission power control method, and apparatus thereof have been described.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application is filed with the Korean Patent Application No. 10-2013-0135867 filed in Korea on November 08, 2013 and the Patent Application No. 10-2014-0012709 filed in Korea on February 04, 2014 and July 2014. Priority is claimed under Patent Application No. 10-2014-0088948 filed in Korea on the 15th in accordance with US Patent Act Article 119 (a) (35 USC § 119 (a)), all of which are hereby incorporated by reference. Incorporated into the application. In addition, if this patent application claims priority for the same reason for countries other than the United States, all its contents are incorporated into this patent application by reference.

Claims (20)

1. In the method for the terminal to control the uplink transmission power,

   Transmission of the uplink control channel and / or the uplink data channel to transmit at least one physical uplink control channel and / or at least one uplink shared channel in two or more cells Allocating power; And

   Transmitting the uplink control channel and / or the uplink data channel to one or more base stations according to the allocated transmission power.
2. The method of claim 1,

   The allocating of the transmit power may include allocating a cell belonging to a first base station among cells to which the uplink control channel is transmitted as priority.
3. The method of claim 1,

   The allocating of the transmit power may include allocating the transmit power based on whether UCI is included in the uplink control channel or the uplink data channel or the type or number of uplink control information (UCI).
4. The method of claim 1,

   The transmission power of the uplink data channel in the first cell excludes a value obtained by scaling the transmission power of the uplink control channel transmitted in the first cell to the scaling factor of the first cell from the total transmission power. Method within a value.
5. The method of claim 1,

   When the uplink data channel to be transmitted in one cell includes the UCI, the UE allocates the transmission power of the uplink data channel including the UCI in preference to the uplink data channel in another cell not including the UCI. Characterized in that the method.
6. The method of claim 1,

   The terminal receives the indication information indicating the simultaneous transmission of the uplink in the two or more cells from the base station as an RRC configuration parameter (RRC configuration parameter).
7. The method of claim 1,

   The two or more cells include a first cell and a second cell,

   The first cell is a Pcell and the second cell is a Scell,

   Wherein the first cell is controlled by a master base station and the second cell is controlled by a secondary base station, or the first cell is controlled by a secondary base station and the second cell is controlled by a master base station.
8. The method of claim 1,

   The allocating of the transmit power may include allocating the uplink control channel including HARQ-ACK as a priority.
9. In the method for the base station to control the uplink transmission power of the terminal,

   Transmitting, to the UE, indication information indicating simultaneous transmission of uplink control information in two or more cells as an RRC configuration parameter; And

   And receiving one or more uplink control channels (Physical Uplink Control CHannel) and / or one or more uplink data channels (Physical Uplink Shared CHannel) whose transmission power is controlled according to the indication information.
10. The method of claim 9,

    The transmission power is determined by giving priority to a cell belonging to a first base station among cells in which the uplink control channel is transmitted.
11. The method of claim 9,

    The transmission power is determined according to whether the UCI is included in the uplink control channel or the uplink data channel or the type or number of uplink control information (UCI).
12. The method of claim 9,

    The transmission power of the uplink data channel in the first cell excludes a value obtained by scaling the transmission power of the uplink control channel transmitted in the first cell to the scaling factor of the first cell from the total transmission power. Method within a value.
13. The method of claim 9,

    When the uplink data channel to be transmitted in one cell includes the UCI, the uplink data channel including the UCI is allocated the transmission power in preference to other uplink data channels not including the UCI to be transmitted in another cell. How to.
14. The method of claim 9,

    The transmit power is determined by giving priority to the uplink control channel including HARQ-ACK.
15. In the terminal for controlling the uplink transmission power,

    Receiving unit for receiving a downlink from the base station;

    Transmission of the uplink control channel and / or the uplink data channel to transmit at least one physical uplink control channel and / or at least one uplink shared channel in two or more cells A control unit for allocating power; And

    And a transmitter for transmitting the uplink control channel and / or the uplink data channel to one or more base stations according to the allocated transmission power.
16. The method of claim 15,

    The control unit allocates the transmission power to the uplink control channel or the uplink data channel based on whether UCI is included or the type or number of uplink control information (UCI).
17. The method of claim 15,

    The control unit transmits a transmission power of an uplink data channel in a first cell by scaling a transmission power of an uplink control channel transmitted in the first cell to a scaling factor of the first cell in total transmission power. And allocating uplink data channel transmission power of the first cell within a value excluding the Tx.
18. The method of claim 15,

    When the uplink data channel to be transmitted in one cell includes the UCI, the controller allocates the transmission power of the uplink data channel including the UCI in preference to the uplink data channel to be transmitted in another cell not including the UCI. Terminal, characterized in that.
19. The method of claim 15,

    The receiving unit is a terminal, characterized in that for receiving indication information indicating the simultaneous transmission of uplink in the two or more cells as an RRC configuration parameter (RRC configuration parameter).
20. In the base station for controlling the uplink transmission power of the terminal,

    A transmitter for transmitting, to an RRC configuration parameter, indication information indicating simultaneous transmission of uplink control information from two or more cells to the UE;

    A receiver configured to receive at least one uplink control channel (Physical Uplink Control CHannel) and / or at least one uplink data channel (Physical Uplink Shared CHannel) whose transmission power is controlled according to the indication information; And

    And a control unit for controlling the transmitter and the receiver.

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