CN110677905B

CN110677905B - Method for controlling uplink transmission power and apparatus therefor

Info

Publication number: CN110677905B
Application number: CN201910949779.4A
Authority: CN
Inventors: 卢珉锡; 崔宇辰
Original assignee: KT Corp
Current assignee: KT Corp
Priority date: 2013-11-08
Filing date: 2014-11-05
Publication date: 2023-06-16
Anticipated expiration: 2034-11-05
Also published as: WO2015069013A1; CN110677905A

Abstract

The present invention relates to a method and apparatus for controlling uplink transmission power. A method for controlling uplink transmission power by a terminal according to an embodiment of the present invention includes the steps of: allocating transmission power of one or more uplink control channels and/or one or more uplink data channels for transmitting 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 for controlling uplink transmission power and apparatus therefor

The present application is a divisional application of chinese patent application with application number 201480054086.4, entitled "method for controlling uplink transmission power and apparatus thereof", and chinese patent application with application number 201480054086.4 is a chinese national stage application of international application PCT/KR2014/010565 filed on 11 months 5 of 2014.

Technical Field

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 when uplink transmission in two or more cells is performed.

Background

With the development of communication systems, consumers such as companies and individuals have used a variety of wireless terminals. Current mobile communication systems attached to the third generation partnership project (3 GPP), such as Long Term Evolution (LTE), LTE-advanced (LTE-a), etc., are high-speed and large-capacity communication systems capable of transmitting and receiving various data, such as image data, wireless data, etc., in addition to providing voice-oriented services, and development of a technology capable of transmitting a large amount of data close to the data amount of a wired communication network is required. Meanwhile, according to the introduction of deployments such as multi-cells or small cells, there is a need for a technique and method that enable carrier aggregation to be applied in various development scenarios. In particular, a technique of controlling power transmission when uplink transmission is performed in a plurality of cells is required.

Disclosure of Invention

Technical problem

An aspect of the present invention is to provide a technique for controlling transmission power when a user equipment provides uplink transmission to two or more cells and two or more base stations. More specifically, it is an aspect of the present invention to provide a method and apparatus for controlling power of uplink transmission transmitted in uplink by a user equipment when taking into account transmission of Physical Uplink Control Channels (PUCCHs) in two or more cells, simultaneous transmission of PUCCHs through different serving cells, and simultaneous transmission of PUCCHs to different base stations.

Technical solution

According to an aspect of the present invention, there is provided a method for controlling uplink transmission power by a user equipment. The method comprises the following steps: allocating a transmission power of at least one Physical Uplink Control Channel (PUCCH) and/or a transmission power of at least one Physical Uplink Shared Channel (PUSCH) for transmitting the PUCCH and/or PUSCH on two or more cells; and transmitting the PUCCH and/or the PUSCH to at least one base station according to the allocated transmission power.

According to another aspect of the present invention, a method for controlling uplink transmission power of a user equipment by a base station is provided. The method comprises the following steps: transmitting indication information indicating simultaneous transmission of Uplink Control Information (UCI) on two or more cells to a user equipment as Radio Resource Control (RRC) configuration parameters; and receiving at least one Physical Uplink Control Channel (PUCCH) and/or at least one Physical Uplink Shared Channel (PUSCH) from the user equipment, the transmission power of which is controlled according to the indication information.

According to another aspect of the present invention, there is provided a user equipment for controlling uplink transmission power. The user equipment includes: a receiving unit for receiving a downlink from a base station; a control unit for allocating a transmission power of at least one Physical Uplink Control Channel (PUCCH) and/or a transmission power of at least one Physical Uplink Shared Channel (PUSCH) in order to transmit the PUCCH and/or PUSCH on two or more cells; and a transmission unit for transmitting the PUCCH and/or the PUSCH to at least one base station according to the allocated transmission power.

According to another aspect of the present invention, there is provided a base station for controlling uplink transmission power of a user equipment. The base station includes: a transmission unit for transmitting indication information indicating simultaneous transmission of Uplink Control Information (UCI) on two or more cells as Radio Resource Control (RRC) configuration parameters to a user equipment; a receiving unit for receiving at least one Physical Uplink Control Channel (PUCCH) and/or at least one Physical Uplink Shared Channel (PUSCH) from a user equipment, the transmission power of which is controlled according to the indication information; and a control unit for controlling the transmission unit and the reception unit.

Advantageous effects

When the present invention is implemented, transmission power can be controlled in the case where uplink transmission in two or more cells is performed. More specifically, it is an aspect of the present invention to provide a method and apparatus for controlling power of uplink transmission transmitted in uplink by a user equipment when giving consideration to PUCCH transmission to the same base station or different base stations in two or more cells and simultaneous transmission of PUCCHs through different serving cells.

Drawings

Fig. 1 is a view illustrating small cell deployment according to an embodiment of the present invention.

Fig. 2 is a view illustrating a small cell deployment scenario.

Fig. 3 to 6 are views each illustrating a specific case of small cell deployment.

Fig. 7 is a view illustrating various cases of carrier aggregation.

Fig. 8 is a view illustrating an application of a specific method 1 according to an embodiment of the present invention.

Fig. 9 is a view illustrating an application of the specific method 2 according to another embodiment of the present invention.

Fig. 10 is a view illustrating an application of the specific method 3 according to another embodiment of the present invention.

Fig. 11 is a view illustrating an application of a specific method a according to another embodiment of the present invention.

Fig. 12 is a view illustrating an application of a specific method B according to another embodiment of the present invention.

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

Fig. 14 is a view illustrating a process of controlling power of uplink transmission by a user equipment according to an embodiment of the present invention.

Fig. 15 is a view illustrating a procedure in which a base station receives an uplink signal transmitted in a state of controlling transmission power according to an embodiment of the present invention.

Fig. 16 is a view illustrating a configuration of a user equipment according to another embodiment of the present invention.

Fig. 17 is a view illustrating a configuration of a base station according to another embodiment of the present invention.

Detailed Description

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that where elements in the figures are assigned reference numerals, the same reference numerals will be used to designate the same elements, although they are shown in different figures. Furthermore, 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 unclear.

The wireless communication system of the present invention is widely deployed to provide various communication services such as voice, packet data, and so on. A wireless communication system includes a User Equipment (UE) and a Base Station (BS). In this specification, a UE has a broad concept meaning a terminal in wireless communication. Therefore, the UE should be interpreted as a concept including a Mobile Station (MS), a User Terminal (UT), a Subscriber Station (SS), a radio device, etc. in a global system for mobile communications (GSM), and a User Equipment (UE) in Wideband Code Division Multiple Access (WCDMA), long Term Evolution (LTE), high Speed Packet Access (HSPA), etc. Hereinafter, in this specification, the UE may be simply referred to as a "terminal".

A BS or cell generally refers to a site that communicates with UEs and may be referred to by different terms such as node B, eNB, sector, site, base Transceiver System (BTS), access Point (AP), relay node, remote Radio Head (RRH), radio Unit (RU), small cell, etc.

In particular, in the present specification, a BS or a cell should be interpreted as having a broad meaning indicating a partial area or function covered by a Base Station Controller (BSC) in Code Division Multiple Access (CDMA), a node B in Wideband Code Division Multiple Access (WCDMA), or an eNB or sector (or site) in LTE. Accordingly, the BS or cell has a wide meaning including various coverage areas, such as a megacell, a macrocell, a microcell, a picocell, a femtocell, a communication range of a relay node, a communication range of an RRH, a communication range of an RU, a communication range of a small cell, and the like.

Each of the above enumerated various cells has a BS controlling the corresponding cell, and thus the BS should be interpreted in two senses: i) The BS may be the device itself that provides the megacell, macrocell, microcell, picocell, femtocell, and microcell with respect to the wireless region, or ii) the BS may indicate the wireless region itself. In i), all devices may be indicated as BSs, which interact with each other so that the devices providing the predetermined wireless area can be controlled by the same entity or the wireless areas are cooperatively configured. Accordingly, schemes for configuring a wireless region, an eNB, an RRH, an antenna, an RU, a Low Power Node (LPN), a point, a transmission/reception point, a transmission point, a reception point, and the like may be embodiments of a BS. In ii), a wireless region itself receiving or transmitting a signal from the point of view of the UE or the neighbor BS may be indicated as a BS.

Thus, a megacell, macrocell, microcell, picocell, femtocell, small cell, RRH, antenna, RU, LPN, point, eNB, transmission/reception point, transmission point, and reception point may be collectively referred to as a "BS" in general.

In the present specification, a UE and a BS, which are two transmission or reception topics used to implement the technology or technical ideas described in the present specification, are used in a broad sense and are not limited by the terms or words specifically designated. Herein, the term "Uplink (UL)" refers to a scheme for performing transmission and reception of data with respect to the BS by the UE, and the term "Downlink (DL)" refers to a scheme for performing transmission and reception of data with respect to the UE by the BS.

There is no limitation on the multiple access scheme corresponding to the wireless communication system. For example, various multiple access schemes may be used, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), OFDM (orthogonal frequency division multiplexing) -FDMA, FDMA-TDMA, and OFDM-CDMA. Embodiments of the present invention may be applied to resource allocation in the field of asynchronous wireless communication that has undergone GSM, WCDMA and HSPA and evolved to LTE and LTE-advanced, and in the field of synchronous wireless communication that has evolved to CDMA, CDMA-2000 and Ultra Mobile Broadband (UMB). The present invention should not be construed as being limited or restricted 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.

In this regard, a Time Division Duplex (TDD) scheme in which UL transmission and DL transmission are performed at different times may be used. Alternatively, a Frequency Division Duplex (FDD) scheme may be used in which UL and DL transmissions are performed at different frequencies.

Also, in a system such as LTE or LTE-a, specifications are established by configuring UL and DL based on one component carrier or one component carrier pair. In UL and DL, control information is transmitted through control channels such as a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator Channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a Physical Uplink Control Channel (PUCCH), an EPDCCH (enhanced physical downlink control channel), and the like. In UL and DL, data channels such as a Physical Downlink Shared Channel (PDSCH), a Physical Uplink Shared Channel (PUSCH), and the like are configured and then used to transmit data.

The control information may be transmitted by using EPDCCH (enhanced PDCCH or enhanced PDCCH).

In this specification, a cell may refer to a coverage area of a signal transmitted from a transmission/reception point, a component carrier having a coverage area of a signal transmitted from a transmission/reception point (transmission point or transmission/reception point), or the transmission/reception point itself.

The wireless communication system to which the embodiments of the present invention can be applied may be a coordinated multi-point transmission/reception (CoMP) system, a coordinated multi-antenna transmission system, or a coordinated multi-cell communication system in which two or more transmission/reception points cooperatively transmit signals. The CoMP system may include at least two multiple transmission/reception points and a UE.

The multi-transmission/reception electricity may be at least one RRH connected to the BS, the macrocell, or the eNB through an optical cable or an optical fiber and controlled through a wire, and have a high transmission power or a low transmission power in an area of the macrocell.

In this specification, transmission power may represent transmission electric power or power value, and may be represented and described as P representing power.

Hereinafter, DL refers to a communication or a communication path from a multi-transmission/reception point to a UE, and UL refers to a communication or a communication path from a UE to a multi-transmission/reception point. In DL, the transmitter may be part of a multi-transmission/reception point and the receiver may be part of a UE. In the UL, the transmitter may be part of a UE and the receiver may be part of a multiple transmission/reception point.

Hereinafter, a case in which signals are transmitted and received through a channel such as PUCCH, PUSCH, PDCCH, PDSCH, EPDCCH, PDSCH may be denoted as transmitting or receiving PUCCH, PUSCH, PDCCH, PDSCH, EPDCCH or PDSCH.

Also, hereinafter, description of "transmission or reception of a PDCCH" or "transmission or reception of a signal through a PDCCH" may be used in a sense that it includes transmission and reception of a PDCCH or transmission or reception of a signal through a PDCCH.

In particular, the physical downlink control channel described below may represent PDCCH or EPDCCH, and may also be used in the sense of including both PDCCH and EPDCCH.

Furthermore, the EPDCCH as an embodiment of the present invention may be applied even to a portion in which a physical downlink control channel is described as a PDCCH for convenience of description, and the EPDCCH may also be applied to a portion in which a physical downlink control channel is described as an EPDCCH as an embodiment of the present invention.

Meanwhile, the higher layer signaling described below includes Radio Resource Control (RRC) signaling through which RRC information including RRC parameters is transmitted.

The eNB, which is an embodiment of the BS, performs DL transmission to the UE. The eNB may transmit a PDSCH that is a primary physical channel for unicast transmission and may transmit a PDCCH for transmitting DL control information, such as scheduling required for receiving the PDSCH and scheduling grant information for transmitting a UL data channel (e.g., PUSCH). Hereinafter, transmission and reception of signals through each channel will be described as transmission and reception of the corresponding channel.

A small cell using a low power node is considered as a means for coping with the proliferation of mobile services. A low power node refers to a node that uses lower transmission (Tx) power than a typical macro node.

With carrier aggregation (hereinafter referred to as "CA") technology prior to 3 rd generation partnership project (3 GPP) release 11, small cells can be constructed by using low power Remote Radio Heads (RRHs) as geographically distributed antennas within the macrocell coverage.

However, in order to apply the CA technology, a macro cell or an RRH cell is constructed to be scheduled under the control of one BS. For this reason, an ideal backhaul is required to be constructed between the macrocell node and the RRH.

An ideal backhaul refers to a backhaul that exhibits very high throughput and very short delay, such as a dedicated point-to-point connection using optical lines (fiber) and line-of-sight (LOS) microwaves.

Conversely, a non-ideal backhaul refers to a backhaul that exhibits relatively low throughput and relatively long delays, such as digital subscriber line (xDSL) and non-LOS microwaves.

With the single BS-based CA technology described above, multiple serving cells may be aggregated and may provide services to UEs. In particular, 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 constructed between a macrocell node and an RRH, the macrocell and the RRH may be configured together as a serving cell and may provide services to the UE.

When configuring single BS based CA technology, the UE may have only one RRS connection with the network.

One serving cell provides non-access stratum (hereinafter, referred to as "NAS") mobility information (e.g., tracking Area Identity (TAI)) at RRC connection setup/re-establishment/handover, and one serving cell provides security input at RRC connection re-establishment/handover. Such cells are referred to as "primary cells (Pcell)". The Pcell may change only according to the handover procedure. A secondary cell (Scell) and a Pcell may be configured together as a serving cell according to UE capabilities.

Hereinafter, the present invention relates to an operation method and apparatus of a UE, which enable a UE belonging to a relevant BS to support a combined operation of FDD and TDD when a small cell and an optional cell/BS/RRH/antenna/RU support different duplexing modes (i.e., FDD and TDD) in a multi-layer cell structure, and a method for a BS using the same, and an apparatus thereof. And, the present invention relates to a method for designating scells when each duplex mode is used in a macro cell, a small cell, and optionally a cell/BS/RRH/antenna RU regardless of the duplex mode and supporting dual connection between the macro cell and the small cell, joint operation of the macro cell and the small cell, and CA of the macro cell and the small cell.

Also, the UE in this specification may communicate with one or more cells or BSs, or may group one or more cells and may communicate with a grouped cell. Specifically, the UE may perform communication in various forms. In this case, the transmission power may represent transmission power for each of one or more cells, for each of the groups, or for each of the BSs according to respective communication forms. Hereinafter, for convenience of understanding, the above-described transmission power will be described and explained as a total transmission power.

Hereinafter, a small cell deployment scenario in which the proposal being described by the present invention can be applied will be described.

Fig. 1 illustrates a configuration in the case where a small cell and a macro cell are co-located. In fig. 2 and 3 below, each case is classified in more detail according to whether macro coverage is present, whether the relevant small cell is for outdoor or indoor use, whether the deployment of the relevant small cell is in sparse or dense situations, and from a spectrum point of view whether the same spectrum as the macro cell is used. The configuration of a specific case will be described with reference to fig. 2 to 6.

Fig. 2 is a view illustrating a small cell deployment scenario. Fig. 2 illustrates a typical representative configuration in the case of fig. 3 to 6. Fig. 2 illustrates a small cell deployment scenario and includes scenarios #1, #2a, #2b, and #3. Reference numeral 200 indicates a macro cell, and each of

reference numerals

210 and 220 indicates a small cell. In fig. 2, overlapping (overlay) macro cells may or may not be present. Coordination may be performed between macrocell 200 and

small cells

210 and 220, and coordination may also be performed between

small cells

210 and 220. Furthermore, the overlapping areas of macro cell 200 and

small cells

210 and 220 may be connected to a cluster.

Fig. 3 illustrates case #1 of small cell deployment. Case 1 is a co-channel deployment scenario of a small cell and a macro cell in the presence of a covered macro cell, and is an outdoor small cell scenario. Reference numeral 310 indicates a case in which the macro cell 311 and the small cell are all outdoor cells, and reference numeral 312 indicates a small cell cluster. All users are distributed in indoor and outdoor environments.

The solid lines connecting small cells within the small cell cluster 312 represent backhaul links within the cluster. The dotted line connecting the macrocell BS to the small cells within the cluster represents the backhaul link between the small cell and the macrocell.

Fig. 4 illustrates a small cell deployment scenario #2a. Case 2a is a deployment scenario where a small cell and a macro cell use different spectrum in the presence of overlapping macro cells, and is an outdoor small cell scenario. The macro cell 411 and the small cells are all outdoor cells, and reference numeral 412 indicates a small cell cluster. All users are distributed in indoor and outdoor environments.

The solid lines connecting small cells within small cell cluster 412 represent backhaul links within the cluster. The dotted line connecting the macrocell BS to the small cells within the cluster represents the backhaul link between the small cell and the macrocell.

Fig. 5 illustrates a small cell deployment scenario #2b. Case 2b is a deployment scenario where the small cell and the macro cell use different spectrum in the presence of overlapping macro cells, and is an indoor small cell. The macro cell 511 is an outdoor cell, and the small cells are all indoor cells, and reference numeral 512 indicates a small cell cluster. All users are distributed in indoor and outdoor environments.

The solid line connecting small cells within small cell 512 represents backhaul links within the cluster. The dotted line connecting the macrocell BS to the small cells within the cluster represents the backhaul link between the small cell and the macrocell.

Fig. 6 illustrates a small cell deployment scenario #3. Case 3 is an indoor small cell case where there is no coverage of a macro cell. Reference numeral 612 indicates a small cell cluster. Also, the small cells are all indoor cells, and all users are distributed in indoor and outdoor environments.

The solid line connecting the small cells within small cell 612 represents the backhaul links within the cluster. The dotted line connecting the macrocell BS to the small cells within the cluster represents the backhaul link between the small cell and the macrocell.

The various small cell scenarios of frequencies F1 and F2 and fig. 2 and 6 used in fig. 1, which have been described above, may be frequencies supporting the same duplexing mode, or may have different duplexing modes, respectively. For example, a case may be considered in which F1 is a frequency supporting the FFD mode and F2 is a frequency supporting the TDD mode. Alternatively, another case is considered in which F1 is a frequency supporting the TDD mode and F2 is a frequency supporting the FDD mode.

Fig. 7 is a view illustrating various cases of CA.

Referring to fig. 7, even in the CA case, the correlations F1 and F2 may be frequencies supporting the same duplex mode, or may be regarded as frequencies supporting different duplex modes.

Reference numeral 710 indicates that F1 and F2 are co-located and overlap under nearly the same coverage as each other. Reference numeral 710 indicates a case in which two layers provide sufficient coverage and mobility and overlapping F1 and F2 cells can be aggregated.

Reference numeral 720 indicates a case in which F1 and F2 cells are co-located and overlap but the coverage of F2 is less than that of F1. Reference numeral 720 indicates a case in which F1 has sufficient coverage, mobility support is also performed based on F1 coverage, F2 is used to improve throughput, and overlapping F1 and F2 cells can be aggregated.

Reference numeral 730 indicates a case in which F1 and F2 cells are co-located but the F2 antenna is directed to the edge of the cell in order to increase cell edge throughput. Reference numeral 730 indicates a case in which mobility support is performed based on F1 coverage and F1 has sufficient coverage but F2 temporarily has coverage holes. In this case, the F1 and F2 cells in the same eNB may be aggregated at a location where the coverage of the F1 and F2 cells are overlapped.

Reference numeral 740 indicates a case in which F1 has macro coverage and FFH under F2 is used to improve throughput in the hot spot region. In this case, mobility support is performed based on F1 coverage, and cells of the F1 macro cell and the F2 RRH may be aggregated together.

Similar to the case indicated by reference numeral 720, the case indicated by reference numeral 750 is a case in which a frequency selective repeater is deployed to extend the coverage of one carrier. In this case, F1 and F2 cells in the same eNB may be aggregated at a location where the coverage of the F1 and F2 cells overlap.

The PUCCH used as the UL control channel will be briefly described. The relevant UL PUCCH has a format that can be distinguished according to the type of information transmitted by the UE. The type of the format of the PUCCH and its purpose of use will be described below.

The structure of the PUCCH will be described below.

The PUCCH used as the UL control channel has a format that can be distinguished between them according to the type of information transmitted by the UE. The type of the format of the PUCCH and its purpose of use will be described below.

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

PUCCH format 1a/1b is a channel used to transmit a scheduling request and/or acknowledgement/negative acknowledgement (Ack/Nack) for a DL data channel, and format 1a is different from format 1b according to the number of bits of Ack/Nack and a modulation scheme.

The shortened PUCCH format 1a/1b is a format obtained by puncturing the last SC-FDMA symbol of one subframe of the PUCCH format 1a/1b for transmission of Ack/Nack (a/N). Whether to use the related format is determined by the configuration of whether "ackNackSRS-simultaneous transmission" (ackNackSRS-SimultaneousTransmission) is true or false, which is an RRC parameter according to an indication of a higher layer of the BS, and cell specific information of a Sounding Reference Signal (SRS).

PUCCH format 2 is a channel format for transmitting only a Channel Quality Indicator (CQI).

PUCCH format 2a/2b is a channel used to transmit "cqi+ack/Nack for DL data channel", and PUCCH format 2a is different from PUCCH format 2b according to the number of bits of Ack/Nack and a modulation scheme.

PUCCH format 3 is a channel used to transmit Ack/Nack of 4 bits or more under DL CA.

Shortened PUCCH format 3 is a format obtained by puncturing the last SC-FDMA symbol of one subframe of PUCCH format 3 used to transmit Ack/Nack. Whether to use the related format is determined by whether "ackNackSRS-SimultaneousTransmission" is true or false, which is an RRC parameter according to BS high-layer indication, and configuration of cell-specific information of the SRS.

Hereinafter, a brief description will be made of a case in which power of the UE is limited (power limited case) and a case in which power of the UE is not limited (non-power limited case), as a method for performing power control between UL transmission channels, between UL channels and SRS, and between SRS under CA considering transmission of PUCCHs in one serving cell without considering a plurality of PUCCHs.

When the sum of the total transmission powers of the UEs exceeds a value representing the maximum transmission power according to respective communication forms with respect to the UEs configured to simultaneously transmit PUCCH and PUSCH

When determining the transmission power of the PUSCH for the serving cell c, the UE sets the power of the PUCCH to have priority, and determines the transmission power of the PUSCH by scaling the transmission power of the relevant PUSCH with respect to a value between 0 and 1 with respect to the remaining transmission power except for the power of the PUCCH. The UE determines the transmission power of the related PUSCH by using the following equation 1.

Equation 1

Here, the UE scales in a case such as the case of subframe i of serving cell c according to equation 1

In equation 1, +.>

Representing P _PUCCH (i) Linear value of>

Representing P _PUSCH，c (i) Linear value of>

Representing the most configured for the entire UE in subframe iHigh transmission power (total configured maximum output power) P _CMAX Is a linear value of (c). w (i) represents +.>

And has a value of 0.ltoreq.w (i). Ltoreq.1. When PUCCH is not transmitted in subframe i, +.>

Meanwhile, when the sum of the total transmission power of the UEs exceeds

When determining transmission power for transmission between PUSCHs transmitted through different carriers or different serving cells, the UE prioritizes serving cells or component carriers through which the PUSCH having Uplink Control Information (UCI) is transmitted and allocates PUSCH transmission power to the prioritized serving cells or component carriers based on whether information included in the relevant PUSCH includes UCI. Then, the UE performs scaling and determines the transmission power of the PUSCH by using the same scaling factor between the remaining serving cells or the remaining component carriers. Here, the UE may set the scaling factor to 0 for a specific serving cell or a specific component carrier. The UE determines the transmission power of the related PUSCH by using the following equation 2.

Equation 2

The UE transmits PUSCH together with UCI in serving cell j (PUSCH transmission is performed with UCI). When the UE transmits PUSCH without UCI in another serving cell, the total transmission power of the UE may exceed

In this case, the UE pair +.>

Scaling is performed so as to satisfy equation 2 in subframe i through which the UE transmits PUSCH without UCI.

In the equation 2 of the present application,

represents transmission power of PUSCH in the case where PUSCH is transmitted together with UCI, and w (i) represents a scaling factor for serving cell c in the case where UCI is absent. In this case the number of the elements to be formed is,

and when the total transmission power of the UE does not exceed +.>

Do not correspond to->

Power scaling is applied. Here, w (i) may be set to have an equal value when i is greater than or equal to 0, and may have a value of 0 in a specific serving cell.

When the sum of the total transmission power of the UE exceeds

When determining transmission power for transmission between 'pucch+pusch with UCI' and PUSCH without UCI transmitted through a different carrier or a different serving cell, the UE sets transmission power of PUCCH to be ensured in a prioritized manner and sets transmission power of PUSCH with UCI to be ensured. Then, the UE performs scaling and determines the transmission power of the PUSCH by using the same scaling factor between the remaining serving cells or the remaining component carriers with respect to the remaining transmission power of the UE. Here, the UE may set the scaling factor to 0 for a specific serving cell or a specific component carrier. The UE determines the transmission power of the related PUSCH by using the following equation 3.

Equation 3

When the UE simultaneously transmits PUCCH and PUSCH with UCI in serving cell j and PUSCH without UCI in another serving cell, the total transmission power of the UE may exceed

And the UE may obtain according to equation 3

When the sum of the total transmission power of the UE exceeds

In this case, the UE performs scaling by using equal scaling factors between the serving cells or component carriers and determines the transmission power of the SRS when determining the transmission power for the transmission between the SRS transmitted through different carriers or different serving cells. The UE determines the transmission power of each relevant SRS by using the following equation 4.

Equation 4

Here, when the sum of the total transmission power with which the UE transmits the SRS exceeds

In this case, the UE uses the following equation 5 for subframe i and serving cell c +.>

Scaling is performed.

Equation 5

In the equation 5 of the present invention,

representing P _SRS，c (i) And defining +.>

And it represents P _CMAX Is a linear value of (c). w (i) represents ++for serving cell c>

And satisfies 0.ltoreq.i.ltoreq.1. w (i) has equal values in the serving cell.

According to the related art, when a UE transmits a UE data channel, a UL control channel, and a UL signal to a BS simultaneously under CA, only transmission of PUCCH in one serving cell (e.g., a primary serving cell (hereinafter, "Pcell")) is considered, and transmission of PUCCH in another serving cell other than the Pcell is not considered. Therefore, when considering transmission of PUCCH in another serving cell that is not a Pcell, i.e., when considering transmission of PUCCH in each Pcell and another serving cell and simultaneous transmission of PUCCH through a different serving cell, a multiplexing method or a power control method must be redefined and applied between UL channels. Specifically, when the UE transmits UL data channels, UL control channels, and UL signals to the BS, ambiguity occurs such that the BS and the UE do not know how to perform the operation of the UE according to the current technology. Therefore, when configuring a plurality of PUCCHs, a multiplexing method and a power control method for UL signals, UL control channels, and UL data channels transmitted by the UE must be redefined.

The present invention relates to a multiplexing method and a transmission power control method for a UE to transmit a plurality of PUCCHs in UL; multiplexing method and power control method for simultaneous transmission of multiple PUCCHs and one PUSCH; a multiplexing method and a transmission power control method for simultaneous transmission of a plurality of PUCCHs and a plurality of PUSCHs; and an apparatus using the same, in a case when transmission of a PUCCH in another serving cell that is not a Pcell is considered in a small cell environment and under TDD-FDD CA, i.e., when transmission of a PUCCH in each Pcell and another serving cell and simultaneous transmission of PUCCHs through different serving cells are considered.

The present invention relates to a multiplexing method and a transmission power control method for a UE to transmit a plurality of PUCCHs in UL; multiplexing method and power control method for simultaneous transmission of multiple PUCCHs and one PUSCH; a multiplexing method and a transmission power control method for simultaneous transmission of a plurality of PUCCHs and a plurality of PUSCHs; and an apparatus using the method, when considering transmission of PUCCH in another serving cell that is not a Pcell in a small cell environment and under TDD-FDD CA, i.e., when the BS configures transmission of multiple PUCCHs through different serving cells or configures the PUCCH to be able to transmit on the Scell for the UE.

When the BS configures transmission of a plurality of PUCCHs through different serving cells or configures PUCCHs to be able to transmit on the Scell for the UE, the method for each configuration may be a method for setting transmission of the PUCCH or transmission of the PUCCH of the Scell (PUCCH on the Scell) to be semi-statically configured by a new RRC parameter. The scheme implemented by the RRC parameter will be described in a specific method C.

When the BS configures and sets transmission of a plurality of PUCCHs through different serving cells and configures and sets the PUCCHs so as to be capable of transmission on the Scell for the UE, simultaneous transmission of PUCCHs may be performed through different serving cells first. Therefore, a multiplexing method and a power control method for PUCCHs simultaneously transmitted through different serving cells will be presented below.

A power control method between the plurality of PUCCHs will be described.

The

specific methods

1, 2 and 3 may be applied to a power limited case in which the total transmission power exceeds the maximum allowable transmission power p_cmax of the UE at the symbol overlapping portion of PUCCHs transmitted on different cells through which transmission is performed.

Specific method 1), the transmission power of the PUCCH transmitted on different cells may be considered by a method of setting the transmission power of the PUCCH transmitted on each cell using equal proportion values. As one example, the transmission power control is configured to be performed on different PUCCHs transmitted in the ith subframe on the serving cell c by using the following equation 6.

Equation 6

The specific method 1 is a scheme for applying an equal proportion value to transmission power of a PUCCH transmitted on each cell.

Specific method 2) may converge transmission of PUCCH on a specific Pcell, and thus a method for prioritizing transmission power for transmitting PUCCH on a specific Pcell may be considered. Such a method may be regarded as a method for prioritizing transmission power of Pcell, which is a specific cell among cells configured for the UE, when the UE transmits PUCCH to each BS as an UL control channel corresponding to DL transmission transmitted by each BS.

Alternatively, a method for prioritizing transmission power of PUCCH in a serving cell on which transmission of PUCCH as a feedback channel for a different serving cell is converged may be regarded as a method for prioritizing transmission power of a specific cell. In particular, when transmitting PUCCHs on each of two different cells, PUCCHs transmitted on a specific cell may be configured to transmit UCI (hybrid automatic retransmission request (HARQ) -ACK and/or Channel State Information (CSI) and/or Scheduling Request (SR)) for a plurality of cells, and thus this method is a method for prioritizing the setting of transmission power of the relevant PUCCHs. In other words, this method is a method for determining a priority of power setting of each PUCCH transmitted through a different serving cell according to the number of serving cells included in UCI transmitted through a PUCCH transmitted on a specific serving cell and performing power control.

As one embodiment, PUCCH transmitted in the i-th subframe of the serving cell c, i.e., the serving cell configured as a Pcell for the UE, may be configured to be prioritized over PUCCH transmitted on another serving cell j by using the following equation 7, and transmission power control may be configured to be able to be performed on a different PUCCH. And, when the number of serving cells included in UCI transmitted through a PUCCH transmitted in an i-th subframe on serving cell c is greater than the number of serving cells included in UCI transmitted through a PUCCH transmitted on serving cell j, the transmission power control may be configured to be able to be performed on different PUCCHs.

Equation 7

/>

When the former is the same as the latter in terms of the number of serving cells included in UCI, equal power scaling may be performed by using equal proportion values between PUCCHs as in the specific method 1). Alternatively, priorities may be configured to be allocated to feedback types included in UCI, for example, priorities of transmission power control for PUCCHs transmitted on serving cell c and serving cell j may be configured to be determined according to priorities, such as HARQ-ACK or SR > Rank Indicator (RI) > Precoding Matrix Index (PMI) or CQI, HARQ-ACK > SR > RI > PMI or CQI, and SR > HARQ-ACK > RI > PMI or CQI, and power control may be configured to be able to be performed.

The specific method 2 is a scheme for prioritizing and setting power in the case of a specific Pcell configured for a UE, a scheme for prioritizing and setting transmission power of related serving cells when the number of serving cells included in UCI is large, and a scheme for prioritizing feedback types included in UCI and prioritizing and setting transmission power when the transmission power is allocated to a plurality of PUCCHs.

The specific method 3) HARQ-ACK may be the most important information between pieces of UCI transmitted through the PUCCH, and thus a method for prioritizing transmission power of the PUCCH according to the number of serving cells included in UCI described in the specific method 2) according to the number of pieces of HARQ-ACK required to transmit HARQ-ACK as well as the determination of priority of power control on the PUCCH is performed may be considered. Since the PUCCH transmitted on a specific cell may be configured to transmit multiple pieces of HARQ-ACKs for multiple cells, this method is a method for prioritizing the setting of transmission power for the relevant PUCCH. In other words, this method is a method for determining a priority of power setting for each PUCCH transmitted through a different serving cell according to the number of serving cells included in HARQ-ACKs transmitted through PUCCHs of the specific serving cell and performing power control.

As one embodiment, by using the following equation 8, when the number of serving cells included in HARQ-ACKs transmitted through PUCCH of serving cell c in the i-th subframe is greater than the number of serving cells included in HARQ-ACKs transmitted through PUCCH of serving cell j, transmission power control may be configured to be able to be performed on different PUCCHs.

Equation 8

As in the specific method 1), when the former is the same as the latter in terms of the number of serving cells included in the HARQ-ACK, equal power scaling may be configured to be able to be performed by using equal proportion values between PUCCHs. Alternatively, as in the specific method 2), PUCCHs transmitted on Pcell among PUCCHs may be configured to be prioritized, and transmission power control may be configured to be executable. Alternatively, the priority may be configured to be applied to the feedback type of UCI that can be transmitted simultaneously with HARQ-ACK, for example, the priority of transmission power control for PUCCHs transmitted on serving cell c and serving cell j may be configured to be determined according to the priority, such as SR > RI > PMI or CQI, and power control may be configured to be executable.

The specific method 3 is a method for prioritizing the setting of power, which causes transmission power to be converged when the number of serving cells included in HARQ-ACK is large.

In the case of multiple PUCCHs, a scheme for equally scaling the transmission power as described in the specific method 1 has been described; a scheme for prioritizing and setting power in the case of a specific Pcell configured for a UE as described in specific method 2; a scheme for prioritizing and setting transmission power of related serving cells when the number of serving cells included in UCI is large; a scheme for prioritizing types of feedback included in the UCI and prioritizing and setting transmission power; or a scheme for prioritizing a case in which the number of serving cells included in the HARQ-ACK is large and prioritizing power settings for the case, as described in the specific method 3.

Fig. 8 is a view illustrating the application of a specific method 1 according to an embodiment of the present invention.

The case is described in which each PUCCH is transmitted on two cells CC0 and CC 1. In fig. 8, pcell is indicated by reference numeral 810, and Scell is indicated by reference numeral 820. When the specific method 1 is applied to fig. 8, equal proportional values may be applied to the transmission of these PUCCHs. Specifically, when each PUCCH is transmitted on CC0 and CC1 in fig. 8, the applied ratio values become equal.

A case is described in which each PUCCH is transmitted on two cells CC0 and CC 1. In fig. 9, when the specific method 2 is applied to a case in which the Pcell indicated by reference numeral 910 and the Scell indicated by reference numeral 920 are configured for the UE, the specific Pcell configured for the UE may be configured such that the settings of power for the specific Pcell are prioritized during transmission of the PUCCH. That is, the transmission power control may be configured such that the transmission power of the PUCCH transmitted on the Pcell910 is first allocated to the Pcell910 and the remaining transmission power is allocated to the Scell 920.

A case in which both CC0 and CC1 include respective UCI will be described. The number of serving cells included in UCI is equal to 2 in PUCCH indicated with reference numeral 930, and the number of serving cells included in UCI is equal to 1 in PUCCH indicated with reference numeral 940. Even the specific method 2 can be applied to this case. The power of PUCCHs, which are indicated by reference numeral 930 and include a larger number of serving cells, included in UCI may be prioritized and set.

When the former is the same as the latter in terms of the number of serving cells included in the UCI, equal power scaling may be performed by using equal scale values as described above, or transmission power of a specific Pcell may be configured to be prioritized. Alternatively, the priority may be determined according to the type of feedback included in the UCI, as described above.

A case in which a PUCCH including HARQ-ACK is transmitted on each of two cells CC0 and CC1 is described. In fig. 10, a case is described in which the number of serving cells included in the HARQ-ACK is equal to 2 in CC0 indicated by reference numeral 1010 and the number of serving cells included in the HARQ-ACK is equal to 1 in CC1 indicated by reference numeral 1020. When the specific method 3 is applied to this case, the power of the PUCCH including CC0 of a larger number of serving cells included in the HARQ-ACK may be prioritized and set.

When the former is equal to the latter in terms of the number of serving cells included in the HARQ-ACK in the course of applying the specific method 3, equal scaling may be performed by applying the specific method 1, or by applying the specific method 2, the specific Pcell configured for the UE may be configured such that the settings of power for the specific Pcell are prioritized. Alternatively, when the number of serving cells included in the UCI is large, the transmission power of the relevant serving cell may be configured to be prioritized, or the type of feedback included in the UCI may be prioritized and the transmission power may be configured to be prioritized.

Next, a power control method between a plurality of PUCCHs and a single/plurality of PUSCHs will be described.

The specific methods a and B may be applied to a case as a power limited case, in which the total transmission power exceeds the maximum allowable transmission power p_cmax of the UE at an overlapping portion between symbols of the PUCCH transmitted on different cells and symbols of the PUSCH transmitted on different cells transmitted therethrough.

Specific method a), the transmission power for the PUSCH transmitted on different cells can be considered by a method of setting the transmission power of the PUSCH transmitted on each cell using equal ratio values. As one example, the transmission power control is configured to be performed on different PUSCHs transmitted in the i-th subframe on the serving cell c by using the following equation. Specifically, this method is a method for setting transmission power in such a manner that scaling is performed by using an equal scale value for the transmission power of each PUSCH transmitted on each cell with respect to the remaining transmission power obtained by excluding transmission power allocated for a plurality of PUCCHs from the maximum transmission power of the UE.

The UE in the ith subframe for serving cell c

Scaling is performed so that the condition of the following equation 9 is satisfied.

Equation 9

In the equation 9 of the present application,

representing P in the ith subframe _PUSCH，c (i) And>

a linear value representing the maximum output power in the i-th subframe configured for the UE. And wc (i) represents a cell for serving cell c

And has a ratio of 0.ltoreq.wc (i). Ltoreq.. In addition, Z _C (i) Representing +.>

And has a proportionality factor of 0.ltoreq.Z _C (i) The range is less than or equal to 1. When PUCCH is not transmitted in the ith subframe,/i->

A specific method a is an example of applying equal scaling to the transmission power of each PUSCH.

The specific method B) may consider a method for allocating power in such a manner that the power of the PUSCH through which UCI is transmitted is prioritized as compared to the power of the PUSCH without UCI when there is a PUSCH including UCI between PUSCHs transmitted on different cells in order to ensure detection probability and reliability of UCI transmitted as a feedback channel for DL transmission.

As an embodiment, the transmission power control may be configured to be able to be performed on different PUSCHs transmitted on serving cell c and serving cell j in the i-th subframe by using the following equation. When the UE transmits a plurality of PUCCHs and a single/plurality of PUSCHs, if the PUSCH transmitted on the serving cell j includes UCI and the PUSCH without UCI is transmitted on another remaining serving cell, the transmission power of the PUSCH for the serving cell c in the i-th subframe may be set by using the following equation 10

Is a value of (2).

Equation 10

In the equation 10 of the present invention,

representing P in the ith subframe _PUSCH，c (i) Linear value of>

Representing P in ith subframe of serving cell c _PUSCH，c (i) And>

representing transmission power of PUSCH with UCI transmitted on serving cell j and representing P in subframe _PUSCH，j (i) Is a linear value of (c). And (F)>

A linear value representing the maximum output power in the i-th subframe configured for the UE. And, w _c (i) Representing a cell for serving cell c

And has a range of 0.ltoreq.w (i). Ltoreq.1. In addition, z _c (i) Representing a cell for serving cell c

And has a proportionality factor of 0.ltoreq.z _c (i) The range is less than or equal to 1. When the PUCCH is not transmitted in the i-th subframe,

in a specific method C, the UE and the BS may share indication information indicating simultaneous transmission of UCI on two or more cells through RRC configuration parameters. Such a method may be selectively performed, and the BS may indicate the indication information to the UE, which is not an RRC configuration parameter, or the indication information may be reset in another scheme.

The specific method D is a scheme for pre-configuring cells. According to a specific method D, the first cell and the second cell may be configured as or as Pcell and Scell, respectively. The specific method D allows discrimination between a case in which the first cell is controlled by the master BS and the second cell is controlled by the secondary BS and a case in which the second cell is controlled by the master BS and the first cell is controlled by the secondary BS. A particular method D may set this information to be shared between the BS and the UE.

In fig. 11, PUCCH (as indicated by reference numeral 1110) is transmitted on CC0 among the cells of the MeNB, and PUSCH (as indicated by reference numeral 1120) is transmitted on CC 1. Meanwhile, PUCCH (as reference numeral 1130) is transmitted on cell CCx of SeNB. Here, CCx becomes CC0 when the cell index of the SeNB is set independently of the MeNB, and becomes CC2 when the cell index of the SeNB is set in association with the MeNB.

Here, when the specific method a is applied to the PUSCH transmission on each cell, an equal scale value is applied. Specifically, w in equation 9 _c (i) W with CC0 ₀ (i) W of equal to the value of CC1 ₁ (i) Is equal to the value of w of CCx _x (i) Is equal to the value of (c). In this regard, in the case of CC0, PUCCH is transmitted on CC 0. Therefore, the transmission power of the PUCCH is allocated first, and then the transmission power of the PUSCH is allocated.

The specific method B is a method for first allocating transmission power of PUSCH having UCI as control information when a data channel including UCI and a data channel not including UCI are transmitted to different BSs. In fig. 12, CC0 is PUSCH with UCI transmitted to the MeNB (as indicated by reference numeral 1210), and CCx is PUSCH without UCI transmitted to the SeNB (as indicated by reference numeral 1220). Accordingly, when equation 10 is applied to allocation of transmission power of PUSCH, transmission power of PUSCH with UCI of CC0 transmitted to MeNB is allocated, and then the remaining transmission power is allocated to PUSCH transmitted to the remaining SeNB (as indicated by reference numeral 1220).

Fig. 13 is a view illustrating UL transmission according to another embodiment of the present invention.

In fig. 13, CCx becomes CC0 when the cell index of the SeNB is set independently of the MeNB, and becomes CC2 when the cell index of the SeNB is set in association with the MeNB.

Reference numeral 1310 outputs a case in which PUCCH is transmitted. And, PUCCH is transmitted on MeNB and SeNB. In this case, a plurality of PUCCHs are transmitted on a plurality of cells, and thus one particular method may be selected from among the

particular methods

1, 2, and 3. Specifically, a specific method 1 for setting equal proportion values of the PUCCHs may be applied; or a specific method 2 may be applied which proposes a scheme of prioritizing and setting power in the case of a specific Pcell configured for a UE, a scheme of prioritizing and setting power of related serving cells when the number of serving cells included in UCI is large, or a scheme of prioritizing and setting transmission power by prioritizing feedback types included in UCI. Meanwhile, when the PUCCH of each of CC0 and CCx includes UCI, the specific method 3 may be applied according to the number of pieces of HARQ-ACK among the respective pieces UCI in order to set the transmission power of the PUCCH.

Reference numeral 1320 indicates a case in which PUCCH is transmitted on CC0 and PUSCH with UCI is transmitted on CCx. The specific method B may be applied to this case. After allocating transmission power related to the PUCCH of CC0, transmission power is allocated in such a manner that transmission power of PUSCH of CCx is prioritized as compared to transmission power of PUSCH of each of CC0 and CC 1.

A particular method B may also be applied to the case indicated with reference numeral 1330. In a specific method B, transmission power is first allocated to CC0 and CCx, each of which includes UCI. The priority between CC0 and CCx, each of which includes UCI, may be determined in view of the priority of Pcell, the number of pieces of UCI, or the number of pieces of HARQ-ACK included in UCI, as described in specific methods 2 and 3.

The above-described method allows different CCs capable of being transmitted in UL to be configured as two or more CCs in the operation of the UE, and may be regarded as applicable to a method in both a case in which a plurality of TAGs are not configured for the UE and a case in which a plurality of TAGs are configured for the UE. Also, the above method defines the operation of the UE according to a case in which each transmission case of the UE is power limited, i.e., a case in which the total transmission power exceeds the maximum allowable transmission power p_cmax of the UE. The definition of the operation of the UE configures power control or dropping of a specific channel and a specific signal to be performed when transmitting an UL control channel or an UL data channel, and may be regarded as a method capable of maximally securing transmission of the UL control channel and the UL data channel on additional different CCs. The definition of the operation of the UE may be a method capable of preventing excessive power control on the UL control channel and the UL data channel and thus preventing degradation of the data transmission rate of the data channel during CA.

The configuration proposed in the present invention can also be considered when performing dual connectivity in view of small cells. That is, the configuration can be applied even in the case described below.

In this specification, when the UE configures dual connectivity, the BS will be described as a master BS or a first BS, which forms an RRC connection with the UE and provides a cell (e.g., pcell) that becomes a handover reference, or which terminates S1 Mobility Management Entity (MME) and serves as a mobility anchor point in the core network. The primary BS or the first BS may be a BS providing a macro cell or a BS providing any one small cell in case of dual connection between small cells.

Meanwhile, in the dual connectivity environment, a BS different from the primary BS and providing additional radio resources to the UE will be described as a secondary BS or a secondary BS.

The first BS (or primary BS) and the second BS (or secondary BS) may each provide at least one cell to the UE and may be connected to each other through an interface therebetween.

Also, to aid understanding, a cell associated with a first BS may be described as a macro cell, and a cell associated with a second BS may be described as a small cell. However, in the case of the small cell clusters described below, a cell associated with the first BS may even be described as a small cell.

In the present invention, a macrocell may represent each of one or more cells or may be described in the sense of representing all cells associated with a first BS. Also, a small cell may represent each of one or more cells, and may be described in the sense of representing all cells associated with the second BS. However, as described above, in a specific case such as a small cell cluster, the small cell may be a cell associated with the first BS. In this case, the cell of the second BS may be described as another small cell or yet another small cell.

In this regard, in describing the following embodiments of the present invention, a macro cell may be associated with a primary BS or a first BS and a small cell may be associated with a secondary BS or a second BS for convenience of description. However, the present invention is not limited thereto, and the present invention will be applied to even a case in which the secondary BS or the second BS may be associated with a macrocell and the primary BS or the first BS may be associated with a small cell.

There may be a case in which a transmission to a single BS and UL transmissions to different BSs are configured, and thus a method for informing the UE of the relevant configuration may be considered. Specifically, RRC configuration parameters such as "simultaneous UL transmission to both MeNB and SeNB" may be set, and thus the above-described UE operation and the above-described power control method according to the setting may be applied. In addition to UL transmissions using "simultaneous UL transmissions to both MeNB and SeNB", a method for configuring RRC parameters having various forms may be considered. In particular, there may be a method for configuring 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 transmission, and CQI and SRs transmission instead of UL transmission. From the perspective of the UE, the meaning of each transmission may represent simultaneous transmission of Reference Signals (RSs) and channels in each UL to different BSs.

The power control method proposed in the present invention may be considered according to information to be transmitted to a first BS (a master BS or a macro BS) or information to be transmitted to a second BS (a master BS or a macro BS) when UL transmissions to different BSs are configured, wherein the first BS and the second BS are types of different BSs. In particular, the importance of a master BS or a macro BS as a first BS and establishing an RRC connection may be great. Accordingly, the power control method proposed in the present invention may be considered and it allocates power in such a way that UL control channels transmitted to the relevant first BS are prioritized compared to UL control channels transmitted to the second BS. And, power control may be performed according to the priority of the type of UCI transmitted in UL in combination with the power control method. For example, the control method proposed in the present invention can be considered according to HARQ-ACK > =sr > CQI. Specifically, although described as Pcell and Scell in the present invention, the relevant Pcell may be regarded as a cell belonging to a first BS, and Scell may be regarded as a cell belonging to a second BS. The PUCCH is a channel capable of transmitting HARQ-ACK, SR, and CQI, and the PUSCH with UCI is a channel capable of transmitting HARQ-ACK, RI, CQI, PMI and the like. Accordingly, when prioritizing transmission of HARQ-ACKs and performing transmission to different BSs, a method for setting power during performance of power control in a manner of prioritizing transmission of PUSCH with HARQ-ACKs compared to transmission of PUCCH through which CQI is transmitted may be considered.

Hereinafter, when considering transmission of PUCCH on a serving cell other than a Pcell and under TDD-FDDCA in a small cell environment, that is, when considering transmission of PUCCH on a Pcell and another serving cell and simultaneous transmission of PUCCH through a different serving cell, a power control method for transmission of multiple PUCCHs and one PUSCH according to multiple PUCCHs transmitted in UL by a UE and an apparatus for implementing the method will be described.

Fig. 14 is a view illustrating a procedure for controlling power of uplink transmission by a UE according to an embodiment of the present invention.

The UE performs UL transmissions on two or more cells.

First, in step S1410, the UE receives indication information indicating simultaneous UL transmissions on two or more cells from the BS as RRC configuration parameters, as described in a specific method. Step S1410 may be selectively performed and the indication information is indicated in another scheme, which is not an RRC configuration parameter, or the indication information may be preset.

Then, when simultaneous transmission is configured according to the indication information, transmission power of each of the UL control channel and the UL data channel is controlled. Specifically, in step S1420, the UE allocates a transmission point transmission power of an UL control channel and/or a transmission power of an UL data channel in order to transmit one or more UL control channels and/or one or more UL data channels on two or more cells. The scheme for allocating transmission power may be variously applied according to a scheme and a scaling scheme for prioritizing and allocating transmission power, and have been described in

specific methods

1, 2, and 3 and A, B and C above. The specific method 1 is a scheme for scaling the transmission power of the PUCCH of each cell. The specific methods 2 and 3 may apply the priority of power allocation according to the type of UCI or the number of pieces of UCI to transmit power, so that the transmit power is allocated first according to the priority of Pcell and the type of UCI or the number of pieces of UCI included in UL control channel or UL data channel. In this specification, the type of UCI may represent a UCI type.

Meanwhile, in the specific method a, when PUSCH is transmitted on a plurality of cells, the UE may perform transmission power control by applying an equal proportion value to a setting of transmission power for transmitting two or more PUSCHs scheduled to be transmitted with respect to the remaining power except the transmission power of PUCCH transmitted on the plurality of cells.

Next, when the specific method B is applied, the UE may prioritize PUSCH with UCI with respect to PUSCH of another cell and may allocate transmission power to PUSCH with UCI. Specifically, when an UL data channel to be transmitted on a first cell includes UCI in a case where the first cell and a second cell are configured, the UE allocates transmission power in such a manner that transmission power of the UL data channel is prioritized over transmission power of the UL data channel to be transmitted on the second cell.

Also, as described in the specific method D, the first cell and the second cell may be configured as or as Pcell and Scell, respectively, and a case in which the first cell is controlled by the primary BS and the second cell is controlled by the secondary BS may be distinguished from a case in which the second cell is controlled by the primary BS and the first cell is controlled by the secondary BS.

When the allocation of the transmission power is completed according to various schemes, the UE transmits UL control channels and/or UL data channels to one or more BSs according to the allocated transmission power in step S1430.

Fig. 15 is a view illustrating a process in which a BS receives an uplink signal transmitted in a state of controlling transmission power according to an embodiment of the present invention.

The BS may transmit corresponding indication information to the UE so that the UE may perform UL transmission on two or more cells. An example of the indication information may be an RRC configuration parameter. More specifically, in step S1510, the BS transmits indication information indicating simultaneous transmission of UL control information on two or more cells to the UE as an RRC configuration parameter. The RRC configuration parameters may indicate configurations of simultaneous UL transmission and 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 transmission, and CQI and SRs transmission.

In step S1520, the BS receives one or more UL control channels and/or one or more UL data channels from the UE, the transmission power of which is controlled according to the indication information. The control schemes for the transmission power have been described in the

specific methods

1, 2 and 3 and the specific methods A, B and D.

The specific method 1 is a scheme for equally scaling the transmission power of the PUCCH of each cell. In the case of the specific methods 2 and 3, the type of UCI or the number of pieces of UCI may be applied and UL transmission power may be controlled such that transmission power is prioritized and allocated according to the priority of a specific Pcell and the type of UCI or the number of pieces of UCI included in a UL control channel or UL data channel.

Fig. 16 is a view illustrating a configuration of a UE according to still another embodiment of the present invention.

Referring to fig. 16, a UE 1600 according to still another embodiment of the present invention includes a receiving unit 1630, a control unit 1610, and a transmitting unit 1620.

The receiving unit 1630 receives DL control information, DL data, and messages from the BS through the relevant channels.

Also, when considering transmission of PUCCH on a serving cell other than Pcell in the small cell environment and TDD-FDDCA required to perform the above-described present invention, that is, when considering transmission of PUCCH on Pcell and another serving cell and simultaneous transmission of PUCCH through a different serving cell, the control unit 1610 controls the overall operation of the UE to control power for multiple PUCCH and one PUSCH transmission as a basis, and power for multiple PUCCH and one PUSCH transmission as a basis, multiple PUCCH transmitted in UL by the UE.

The transmission unit 1620 transmits UL control information, UL data, and messages to the BS through the relevant channels.

The configuration of the UE will be described in more detail below.

The receiving unit 1630 receives a DL channel from the BS. The control unit 1610 allocates transmission power of UL control channels and/or transmission power of UL data channels in order to transmit one or more UL control channels and/or one or more UL data channels on two or more cells. Then, the transmission unit 1620 transmits the UL control channel and/or the UL data channel to one or more BSs according to the allocated transmission power.

In case of the specific method 1, the control unit 1610 may scale the transmission power of the PUCCH of each cell. In the case of the specific methods 2 and 3, the control unit 1610 may apply the type of UCI or the number of pieces of UCI included in the UL control channel or UL data channel and allocate transmission power such that the transmission power is prioritized and allocated according to the type of UCI or the number of pieces of UCI included in the UL control channel or UL data channel.

In a specific method a, the control unit 1610 may allocate the transmission power of the UL data channel on the first cell within a value obtained after excluding a value obtained by scaling the transmission power of the UL control channel transmitted on the first cell using the scaling factor of the first cell from the total transmission power.

Next, a specific method B is described. When the UL data channel to be transmitted on the first cell includes UCI, the control unit 1610 allocates transmission power in such a manner that transmission power of the UL data channel to be transmitted on the first cell is prioritized with respect to the UL data channel to be transmitted on the second cell. Specifically, when the UL data channel to be transmitted on the first cell includes UCI in a case where the first cell and the second cell are configured, the control unit 1610 allocates transmission power in such a manner that transmission power of the UL data channel to be transmitted on the first cell is prioritized compared to transmission power of the UL data channel to be transmitted on the second cell.

As described in the specific method C, the receiving unit 1630 receives indication information indicating simultaneous UL transmission on two or more cells from the BS as an RRC configuration parameter. This reception may be selectively performed, and the indication information may be indicated in another scheme, which is not an RRC configuration parameter, or may be preset.

Also, as described in particular method D, the first cell and the second cell may be configured as or as Scell and Scell, respectively. The case in which the first cell is controlled by the master BS and the second cell is controlled by the secondary BS can be distinguished from the case in which the second cell is controlled by the master BS and the first cell is controlled by the secondary BS.

Fig. 17 is a view illustrating a configuration of a BS according to still another embodiment of the present invention.

Referring to fig. 17, a BS 1700 according to another embodiment of the present invention includes a control unit 1710, a transmission unit 1720, and a reception unit 1730.

When considering PUCCH transmission on a serving cell other than a Pcell in the small cell environment and TDD-FDD CA required to perform the above-described present invention, i.e., when considering PUCCH transmission on a Pcell and another serving cell and simultaneous transmission of PUCCHs through different serving cells, the control unit 1710 controls the overall operation of the BS to control power for multiple PUCCHs and one PUSCH transmission based on, and power control for multiple PUCCHs and one PUSCH transmission based on multiple PUCCHs of UL transmission in UL.

The transmission unit 1720 and the reception unit 1730 serve to transmit and receive signals, messages, and data required to perform the above-described present invention to/from the UE.

More specifically, the transmission unit 1720 transmits indication information indicating simultaneous transmission of UL control information on two or more cells to the UE as an RRC configuration parameter. An example of the indication information may be an RRC configuration parameter. More specifically, the BS transmits indication information indicating simultaneous transmission of UL control information on two or more cells to the UE as an RRC configuration parameter. The RRC configuration parameters may indicate configurations of simultaneous UL transmission and 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 transmission, and CQI and SRs transmission.

And, the reception unit 1730 receives one or more UL data channels (PUSCHs) and/or one or more UL control channels (PUCCHs) whose transmission power is controlled from the UE according to the indication information.

The control unit 1710 controls the transmission unit 1720 and the reception unit 1730.

The control schemes for the transmission power have been described in the

specific methods

1, 2 and 3 and the specific methods A, B and D.

The specific method 1 is a scheme for scaling the transmission power of the PUCCH of each cell. In the case of the specific methods 2 and 3, the type of UCI or the number of pieces of UCI may be applied and UL transmission power may be controlled such that transmission power is prioritized and allocated according to the type of UCI or the number of pieces of UCI included in the UL control channel or UL data channel.

In a particular method a, when transmitting PUSCH on multiple cells, the UE may apply a ratio value for PUSCH of a first cell. Specifically, the transmission power of the UL data channel on the first cell is less than or equal to a value obtained by excluding a value obtained by scaling the transmission power of the UL control channel transmitted on the first cell using the scaling factor of the first cell from the total transmission power.

Next, when the specific method B is applied, PUSCH with UCI may be prioritized over PUSCH of another cell and transmission power may be allocated thereto. In particular, when an UL data channel to be transmitted on a first cell includes UCI, the UL data channel may be prioritized over an UL data channel to be transmitted on a second cell, and transmission power may be allocated thereto.

In the above, a multiplexing method and a transmission power control method for a multi-control channel (multiple PUCCHs) for a UE to transmit in UL in a small cell environment and in TDD-FDD CA have been described; multiplexing method and transmission power control method for simultaneous transmission of a plurality of control channels and one PUSCH; multiplexing method and transmission power control method for simultaneous transmission of a plurality of control channels and a plurality of PUSCHs; and an apparatus for using the method.

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 will recognize that various modifications and changes in form can be made without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit but describe the technical idea of the present invention, and thus do not limit the scope of the technical idea of the present invention. The scope of the present invention should be construed based on the appended claims, and all technical ideas included in the scope equivalent to the appended claims should be construed to be included in the proper scope of the present invention.

Cross Reference to Related Applications

The present application claims priority from korean filed patent application nos. 10-2013-0136867, 10-2014-0012709 and 10-2014-0088948, respectively, at 11, 8, 2, 4, and 15, 2014, 7 and 15, according to american code, clause 35, clause 119 (a), the entire contents of which are incorporated herein by reference. In addition, the present application requires priority in countries other than the united states, for the same reason based on korean patent application, the entire contents of which are incorporated herein by reference.

Claims

1. A method for controlling uplink transmission power by a user equipment, the method comprising:

allocating transmission power of at least one Physical Uplink Control Channel (PUCCH) and/or transmission power of at least one Physical Uplink Shared Channel (PUSCH) according to a predefined priority for transmitting PUCCH and/or PUSCH on a primary base station including two or more cells and a secondary base station including two or more cells; and

transmitting a PUCCH and/or PUSCH to at least one of the primary base station and the secondary base station according to the allocated transmission power;

wherein the user equipment prioritizes PUCCH and/or PUSCH on the primary base station over PUCCH and/or PUSCH on the secondary base station,

wherein the priority is differently determined based on whether the PUCCH and the PUSCH include Uplink Control Information (UCI) and a type of UCI included in the PUCCH or the PUSCH,

wherein the types of UCI include: hybrid automatic repeat request (HARQ) Acknowledgements (ACKs), scheduling Requests (SRs), rank Indicators (RIs), precoding Matrix Indexes (PMIs) and Channel Quality Indicators (CQIs),

wherein the two or more cells included in the primary base station include a first cell and a second cell, wherein the first cell corresponds to a primary cell (Pcell) and the second cell corresponds to a secondary cell (Scell), and

Wherein the user equipment prioritizes PUSCH including UCI on Scell over PUSCH including no UCI on Pcell and allocates transmission power of PUSCH including UCI on Scell.

2. The method according to claim 1,

wherein the allocation of the transmission power includes prioritizing and allocating the transmission power to a cell belonging to the first base station among cells on which the PUCCH has been transmitted.

3. The method according to claim 1,

wherein the allocation of transmission power includes prioritizing and allocating transmission power to a PUCCH including a hybrid automatic retransmission request (HARQ) Acknowledgement (ACK).

4. A method for controlling uplink transmission power of a user equipment by a primary base station, the method comprising:

transmitting, to a user equipment, indication information indicating simultaneous transmission of Uplink Control Information (UCI) on at least one of a primary base station including two or more cells and a secondary base station including two or more cells as Radio Resource Control (RRC) configuration parameters; and

receiving at least one Physical Uplink Control Channel (PUCCH) and/or at least one Physical Uplink Shared Channel (PUSCH) from a user equipment according to a predefined priority, the transmission power of which is controlled according to the indication information;

wherein PUSCH including UCI on Scell is prioritized over PUSCH including no UCI on Pcell, and transmission power of PUSCH including UCI on Scell is allocated.

5. The method of claim 4, wherein the transmission power is determined by prioritizing and allocating transmission power to a cell belonging to the first base station among cells on which the PUCCH has been transmitted.

6. The method according to claim 4, wherein the method comprises,

wherein the transmission power is determined by prioritizing a PUCCH including a hybrid automatic retransmission request (HARQ) Acknowledgement (ACK).

7. A user equipment for controlling uplink transmission power, the user equipment comprising:

a receiving unit for receiving a downlink from at least one base station;

a control unit for allocating transmission power of at least one Physical Uplink Control Channel (PUCCH) and/or transmission power of at least one Physical Uplink Shared Channel (PUSCH) according to a predefined priority for transmitting PUCCH and/or PUSCH on a primary base station including two or more cells and a secondary base station including two or more cells; and

a transmission unit for transmitting PUCCH and/or PUSCH to at least one of the primary base station and the secondary base station according to the allocated transmission power;

8. The user equipment according to claim 7,

wherein the control unit prioritizes PUSCH including UCI over PUSCH on another cell not including PCI, and allocates transmission power of PUSCH including UCI when PUSCH to be transmitted on any one cell includes UCI.

9. The user equipment of claim 7, wherein the receiving unit transmits, from the base station, indication information indicating simultaneous uplink transmissions on two or more cells as Radio Resource Control (RRC) configuration parameters.

10. A primary base station for controlling uplink transmission power of a user equipment, the primary base station comprising:

a transmission unit for transmitting, as a Radio Resource Control (RRC) configuration parameter, indication information indicating simultaneous transmission of Uplink Control Information (UCI) on at least one of a primary base station including two or more cells and a secondary base station including two or more cells to a user equipment;

A receiving unit for receiving at least one Physical Uplink Control Channel (PUCCH) and/or at least one Physical Uplink Shared Channel (PUSCH) from a user equipment according to a predefined priority, the transmission power of which is controlled according to the indication information; and

a control unit for controlling the transmission unit and the reception unit;