WO2015115830A1 - Method and apparatus for reporting channel status in cellular radio communication system - Google Patents

Method and apparatus for reporting channel status in cellular radio communication system Download PDF

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Publication number
WO2015115830A1
WO2015115830A1 PCT/KR2015/000971 KR2015000971W WO2015115830A1 WO 2015115830 A1 WO2015115830 A1 WO 2015115830A1 KR 2015000971 W KR2015000971 W KR 2015000971W WO 2015115830 A1 WO2015115830 A1 WO 2015115830A1
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csi
cell
transmission period
tdd
subframe
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PCT/KR2015/000971
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French (fr)
Korean (ko)
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김영범
이효진
최승훈
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삼성전자 주식회사
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Priority to KR10-2014-0011182 priority Critical
Priority to KR20140011182 priority
Priority to KR1020140070664A priority patent/KR20150090805A/en
Priority to KR10-2014-0070664 priority
Application filed by 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Priority claimed from JP2016549042A external-priority patent/JP6619344B2/en
Publication of WO2015115830A1 publication Critical patent/WO2015115830A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057Physical resource allocation for CQI
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469Two-way operation using the same type of signal, i.e. duplex using time-sharing

Abstract

A method and an apparatus for reporting channel status in a cellular radio communication system are disclosed. In a communication system supporting a carrier aggregation of a component carrier to which an FDD scheme is applied and a component carrier to which a TDD scheme is applied, a base station identifies a TDD uplink-downlink configuration of a TDD primary cell, and configures a CSI transmission period of an FDD secondary cell according to the TDD uplink-downlink configuration. A terminal transmits a CSI of the FDD secondary cell in a specific sub-frame of the TDD primary cell according to a CSI configuration period indicated by the base station.

Description

Method and apparatus for reporting channel status in cellular wireless communication system

The present invention relates to a method and apparatus for a UE to report channel status information (CSI) to a base station in a cellular wireless communication system.

The wireless communication system is evolving into a high speed, high quality wireless packet data communication system for providing data service and multimedia service, instead of providing an initial voice-oriented service.

Telecommunication standards organizations such as 3-rd Generation Partnership Project (3GPP), 3-rd Generation Partnership Project 2 (3GPP2), Institute of Electrical and Electronics Engineers (IEEE), and others, are known as High Speed Packet Access (HSPA) and Long Term Evolution. ), Various mobile communication standards such as Long-Term Evolution Advanced (LTE-A), High Rate Packet Data (HRPD), Ultra Mobile Broadband (UMB), and 802.16e have been developed to realize high-speed and high-quality packet data services.

In the LTE system, a representative example of a broadband wireless communication system, downlink adopts orthogonal frequency division multiplexing (OFDM), and uplink adopts single carrier frequency division multiple access (SC-FDMA). have. In the multiple access scheme as described above, data for each user is allocated by allocating and operating resources such that time-frequency resources for carrying data or control information do not overlap each other, that is, orthogonality is established among users. Or classify control information.

One of the important technologies for providing a high speed wireless data service in a broadband wireless communication system is support of scalable bandwidth. For example, the system transmission band of the LTE system may have various bandwidths such as 20/15/10/5/3 / 1.4 MHz, and service providers may select a specific bandwidth from among various bandwidths and provide a service. There may also be various types of terminals, such as those capable of supporting a maximum bandwidth of 20 MHz to only a minimum of 1.4 MHz bandwidth. In particular, the LTE-A system may provide a broadband service up to a 100 MHz bandwidth through a carrier aggregation (CA) that serves a terminal through a plurality of component carriers (CCs).

The LTE and LTE-A systems may support both a frequency division duplex (FDD) scheme and a time division duplex (TDD) scheme. The FDD scheme uses separate frequencies for the downlink and the uplink, whereas the TDD scheme uses a common frequency for the downlink and the uplink, and distinguishes transmission and reception of the uplink signal and the downlink signal in the time domain.

Existing mobile communication systems supporting carrier combining have a constraint that the same duplex scheme is applied to each component carrier. That is, only component carriers applying the FDD scheme are combined or only component carriers using the TDD scheme are combined. When the component carriers configured for the terminal use different duplex schemes, timings at which the terminal may perform uplink transmission may be different for each component carrier. Therefore, for a carrier combining system capable of combining and operating a cell applying the FDD scheme and a cell applying the TDD scheme, a UE needs a technique for effectively reporting channel state information (CSI) to a base station.

The present invention provides a method and apparatus for reporting a CSI of a terminal to enable a base station to efficiently transmit downlink data in a wireless communication system.

The present invention provides a method and apparatus for an UE to efficiently report CSI in a communication system supporting carrier combining.

The present invention provides a method and apparatus for a UE to perform CSI reporting to a base station in a communication system supporting carrier combining of component carriers in different duplexing modes.

The present invention provides a method and apparatus for determining a CSI transmission period for a secondary cell of a terminal by a base station when carrier combining of cells of different duplication modes is configured.

The present invention provides a method and apparatus for the UE to periodically transmit the CSI of the secondary cell through the primary cell when carrier combination of cells of different duplication modes is configured.

Method according to an embodiment of the present invention; A method of receiving a channel state in a cellular wireless communication system, the method comprising: setting a carrier coupling between a primary cell of a first duplex mode and a secondary cell of a second duplex mode for a terminal; and a channel state determined for the first duplex mode And determining the CSI transmission period of the secondary cell based on the first set of information (CSI) transmission periods, and transmitting the information on the determined CSI transmission period to the terminal.

Method according to an embodiment of the present invention; A method of reporting a channel state (CSI) by a terminal in a cellular wireless communication system, the method comprising: receiving configuration information for setting carrier coupling between a primary cell of a first duplex mode and a secondary cell of a second duplex mode; Receiving information indicating a CSI transmission period for periodic CSI reporting of the secondary cell from the base station; and reporting the CSI of the secondary cell to the base station according to the CSI transmission period. The CSI transmission period is determined based on the first set of channel state information (CSI) transmission periods specified for the first duplication mode.

Apparatus according to an embodiment of the present invention; A base station apparatus for controlling channel status reporting in a cellular wireless communication system, comprising: setting a carrier combination between a primary cell of a first duplex mode and a secondary cell of a second duplex mode for a terminal, and determining the first duplex mode And a controller for determining a CSI transmission period of the secondary cell based on the first set of channel state information (CSI) transmission periods, and a transmitter for transmitting the information on the determined CSI transmission period to the terminal.

Apparatus according to an embodiment of the present invention; A terminal device for reporting a channel state (CSI) in a cellular wireless communication system, the terminal device receiving configuration information for setting carrier coupling between a primary cell of a first duplex mode and a secondary cell of a second duplex mode, and receiving the secondary information A receiver for receiving information indicating a CSI transmission period for periodic CSI reporting of a cell from the base station, and a transmitter for reporting the CSI of the secondary cell to the base station according to the CSI transmission period, and transmitting the CSI of the secondary cell. The period is determined based on a first set of channel state information (CSI) transmission periods specified for the first duplication mode.

1 illustrates a basic structure of an uplink time-frequency resource region in an LTE system.

2 is a diagram illustrating an example of a system configuration of an LTE-A system supporting carrier combining;

3 is a diagram illustrating a structure of a special subframe of an LTE TDD system.

FIG. 4 is a diagram illustrating timing for uplink reporting when cells to which CA is applied use different duplex schemes. FIG.

5 (composed of FIGS. 5A and 5B) is a diagram illustrating an example of an operation when a CSI transmission period is 2 subframes according to an embodiment of the present invention.

6 (composed of FIGS. 6A and 6B) is a diagram illustrating another example of an operation when a CSI transmission period is 2 subframes according to an embodiment of the present invention.

7 illustrates an example of an operation when a CSI transmission period is 5 subframes according to an embodiment of the present invention.

8 (composed of FIGS. 8A and 8B) is a diagram illustrating an example of an operation when a CSI transmission period is 32 subframes according to an embodiment of the present invention.

9 (composed of FIGS. 9A and 9B) is a diagram illustrating an example of an operation when a CSI transmission period is 64 subframes according to an embodiment of the present invention.

10 (consisting of FIGS. 10A and 10B) is a diagram illustrating an example of an operation when a CSI transmission period is 128 subframes according to an embodiment of the present invention.

11 is a diagram illustrating a setting operation of a CSI transmission period according to an embodiment of the present invention.

12 illustrates a setting operation of a CSI transmission period according to another embodiment of the present invention.

13 is a diagram illustrating a setting operation of a CSI transmission period according to another embodiment of the present invention.

14 illustrates a CSI reporting operation of a terminal according to an embodiment of the present invention.

15 is a diagram illustrating a configuration of a terminal transmitter according to an embodiment of the present invention.

16 is a diagram illustrating a configuration of a base station receiver according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, embodiments of the present invention will be described in detail with the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

Hereinafter, embodiments of the present invention will be described by taking an Evolved Universal Mobile Telecommunications System (E-UTRA) Terrestrial Radio Access (or LTE) or Advanced E-UTRA (or LTE-A) system as an example. The invention is not limited to this particular system, and of course, embodiments of the invention may be applied to other communication systems having a similar technical background and / or channel form. In addition, the embodiments of the present invention may be applied to other communication systems through some modifications without departing from the scope of the present invention by the judgment of those skilled in the art.

In the present specification, a base station (Node B: NB) is an entity that performs resource allocation of a terminal, and may be at least one of an eNode B (eNB), a base station (BS), a radio access unit, a base station controller, or a node on a network. Can be. In addition, a user equipment (UE) may be a mobile station (MS), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function.

1 illustrates a basic structure of an uplink time-frequency resource region in an LTE system. Uplink (UL) refers to a radio link through which a terminal can transmit data or control signals to a base station, and downlink (DL) refers to a radio link through which a base station can transmit data or control signals to a base station. do.

Referring to FIG. 1, in the illustrated 2D radio resource region, the horizontal axis represents a time domain and the vertical axis represents a frequency domain. The minimum transmission unit in the time domain is an SC-FDMA symbol, in which N symb (102) SC-FDMA symbols are gathered to form one slot 106, and two slots are combined to constitute one subframe 105. 10 subframes gather to form one radio frame 107. The slot 106 has a length of 0.5 ms, the subframe has a length of 1.0 ms, and the radio frame 107 has a length of 10 ms. The minimum transmission unit in the frequency domain is a subcarrier.

The basic unit of resource in the time-frequency domain is a resource element (RE) 112, and each RE 112 may be defined as an SC-FDMA symbol index and a subcarrier index. The resource block (RB) 108 (or physical resource block: PRB) includes N symb contiguous SC-FDMA symbols 102 in the time domain and N RB SC contiguous subcarriers 110 in the frequency domain. Is defined as Thus, one RB 108 is composed of N symb × N RB SC REs 112. In general, the minimum transmission unit of data is RB, and the system transmission band is composed of a total of N RB RBs. The total system transmission band is composed of a total of N RB x N RB SC subcarriers 104. In the LTE system, generally N symb = 7, N RB SC = 12, and may be set to another value in some cases.

The LTE system uses techniques such as Adaptive Modulation and Coding (AMC) and channel sensitive scheduling to improve transmission efficiency. By utilizing the AMC scheme, the transmitter can adjust the amount of data to be transmitted according to channel conditions. In other words, if the channel condition is not good, the transmitter reduces the amount of data to be transmitted to adjust the reception error probability to a desired level. If the channel condition is good, the transmitter can effectively transmit a lot of information while increasing the amount of data to be transmitted while matching the probability of reception error to a desired level. The channel-sensitive scheduling resource management method allows the transmitter to selectively service users with good channel condition among multiple users, thereby increasing the radio system capacity of the mobile communication system compared to allocating and servicing channels to one user at the transmitter. Can be. This increase in capacity is called the multi-user diversity gain. In short, the AMC scheme and the channel sensitive scheduling scheme are methods of applying appropriate modulation and coding schemes at the time when it is determined to be most efficient by receiving partial channel state information from the receiver.

When the AMC scheme is used in conjunction with a multiple antenna multiple input / output (MIMO) scheme, a function of determining the number (or rank), precoding, etc. of spatial layers through which a signal is transmitted It may include. In this case, the AMC method not only considers a coding rate and a modulation method to determine an optimal data rate, but also determines how many transport layers are used using MIMO.

In order to support the AMC operation, the terminal must perform a channel state information (CSI) reporting operation to the base station. The CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), or a Rank Indicator (RI). CQI represents the Signal to Interference and Noise Ratio (SINR) for the system wideband or some subbands. Such CQI is generally expressed in the form of Modulation and Coding Scheme (MCS) to satisfy the required data reception performance. PMI provides precoding information required when a base station transmits data through multiple antennas in a system supporting MIMO. RI provides rank information required when a base station transmits data through multiple antennas in a system supporting MIMO. The CSI is information provided by the terminal to the base station to help the scheduling of the base station. The base station may determine information such as MCS, precoding, rank, etc. to be applied to actual data transmission based on the CSI.

The UE may periodically transmit the CSI at regular time intervals by an advance appointment with the base station, which is called 'periodic CSI reporting'. The base station informs the terminal of control information necessary for 'periodic CSI reporting' of the terminal, for example, a CSI transmission cycle, a CSI transmission resource, and the like through signaling. In case of 'periodic CSI reporting', the UE basically transmits CSI to a base station through a PUCCH (Physical Uplink Control Channel). Exceptionally, when the UE needs to perform PUSCH (Physical Uplink Shared Channel) transmission, which is a channel for transmitting uplink data at the time when CSI for 'cyclic CSI reporting' needs to be transmitted, the UE multiplexes CSI with uplink data. It can transmit to the base station through the PUSCH.

Unlike 'periodic CSI reporting', the base station may request 'aperiodic CSI reporting' from the terminal as needed. The base station transmits 'aperiodic CSI report request control information' to the terminal through a control channel for scheduling uplink data of the terminal. The terminal, which has received the request for 'aperiodic CSI report' through the 'aperiodic CSI report request control information', performs CSI report to the base station through the PUSCH.

The LTE system adopts a hybrid automatic repeat request (HARQ) scheme in which the terminal or the base station retransmits the corresponding data in the physical layer when a decoding failure occurs in the data transmission. In the HARQ scheme, when the receiver fails to correctly decode the data, the receiver transmits HARQ NACK (Negative Acknowledgement), which informs the transmitter of the decoding failure, so that the transmitter can retransmit the corresponding data in the physical layer. The receiver combines the data retransmitted by the transmitter with the data that has previously failed to be decoded to increase data reception performance. In addition, if the data is correctly decoded, the receiver may transmit HARQ ACK (Acknowledgement), which is information indicating a successful decoding, so that the transmitter may transmit new data.

Control information such as HARQ ACK / NACK and CSI fed back to the base station by the terminal is called uplink control information (UCI). In the LTE system, the UCI is transmitted to a base station through a PUCCH, which is an uplink control channel dedicated to control information, or multiplexed with uplink data through a PUSCH, which is a physical channel for uplink data transmission, to be transmitted to a base station.

One of the important things for providing high speed wireless data service in broadband wireless communication system is support of scalable bandwidth. For example, the system transmission band of the LTE system may have various bandwidths such as 20/15/10/5/3 / 1.4 MHz, and service providers may select a specific bandwidth from among various bandwidths and provide a service. The terminal may support up to 20 MHz bandwidth or only 1.4 MHz bandwidth according to the type.

The LTE-A system requires wider bandwidth than the LTE system for high speed data transmission. In addition, it is important that the LTE-A system provides backward compatibility with the LTE terminals, and the LTE terminals should also be able to receive services by accessing the LTE-A system. To this end, the LTE-A system divides the entire system band into component carriers (CCs) or subbands of a bandwidth that can be transmitted or received by the LTE terminal, and combines several component carriers to service the terminal. Can be. The LTE-A system transmits data for each component carrier, and can support high-speed data transmission by performing a transmission / reception process of an existing LTE system for each component carrier. As such, the LTE-A system may provide a broadband service up to a 100 MHz bandwidth through a carrier aggregation (CA) technology that combines LTE carriers.

2 shows an example of a system configuration of an LTE-A system supporting carrier combining.

2, the base station 202 supports the combination of two component carriers (CC # 1, CC # 2), CC # 1 is composed of a frequency f1, CC # 2 is a frequency f2 different from f1 Consists of CC # 1 and CC # 2 are provided in one base station 202. The base station 202 provides coverages 204 and 206 corresponding to each component carrier. In the LTE-A system supporting carrier combining, data transmission and control information transmission for supporting data transmission are basically performed for each component carrier. In the present specification, unless otherwise noted, a cell may have the same meaning as a component carrier. The configuration of FIG. 2 is equally applicable to uplink carrier coupling as well as downlink carrier coupling.

In the carrier combining system, each component carrier is divided into a primary cell (Pcell) or a secondary cell (Scell). Pcell provides a basic radio resource to the terminal, and refers to a cell that the terminal is a base for performing operations such as initial access and handover. The Pcell consists of a downlink primary frequency (or primary component carrier (PCC)) and an uplink primary frequency. The UE transmits UCI including HARQ ACK / NACK or CSI fed back to the base station through the PUCCH, and the PUCCH may be transmitted only through the Pcell. The Scell is a cell that provides additional radio resources to the UE and includes a downlink secondary frequency (or Secondary Component Carrier (SCC)) and an uplink secondary frequency or consists only of a downlink secondary frequency.

The LTE and LTE-A systems may support a frequency division duplex (FDD) scheme and a time division duplex (TDD) scheme for each cell. The FDD scheme uses separate frequencies for downlink and uplink, whereas the TDD scheme uses a common frequency for downlink and uplink, and operates uplink and downlink signals separately in the time domain. do. The LTE and LTE-A systems classify and transmit uplink or downlink signals for each subframe in the TDD scheme. Therefore, according to the traffic load of uplink and downlink, the uplink and downlink subframes are divided and operated evenly in the time domain, more subframes are allocated to the downlink, or uplink is used. More subframes can be allocated and operated on.

Table 1 below shows TDD uplink-downlink (UL-DL) configurations defined in LTE.

Table 1

Figure PCTKR2015000971-appb-T000001

As shown in Table 1, each of the ten subframes constituting one radio frame operates as one of 'D', 'U', and 'S' according to an uplink-downlink configuration determined by a base station. do. Where 'D' represents a subframe configured for downlink transmission, 'U' represents a subframe configured for uplink transmission, and 'S' represents a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and UpPTS It represents a special subframe consisting of (Uplink Pilot Time Slot). In the DwPTS, downlink control information can be transmitted as in a general downlink subframe. If the length of the DwPTS is long enough according to a special subframe configuration, downlink data transmission is also possible. GP is a section that accommodates the transition from the downlink to the uplink, and the length is determined according to the network configuration. UpPTS is composed of one or two SC-FDMA symbols, and is used for transmitting a SRS (Sounding Reference Signal) of a terminal required for a base station to estimate an uplink channel state or a random access preamble transmission of a terminal for random access.

3 shows a structure of a special subframe in an LTE TDD system.

Referring to FIG. 3, the special subframe has a length of 1 ms like the normal subframe, and according to a special subframe configuration given by the base station, the DwPTS 301 is composed of 3 to 12 OFDM symbols, and the UpPTS 303 ) Is composed of 1 to 2 SC-FDMA symbols, GP 302 is composed of the remaining time interval minus the length of the DwPTS 301 and UpPTS 303 of 1ms. As shown in Table 1, the special subframe may be set at the position of the subframe # 1 or the subframe # 6 according to the TDD uplink-downlink configuration.

For example, in case of TDD uplink-downlink configuration # 6, downlink data and control information can be transmitted in subframes # 0, # 5, and # 9, and subframes # 2, # 3, # 4, and # 7. , Uplink data and control information can be transmitted to # 8. In subframes # 1 and # 6 corresponding to the special subframe, downlink control information and downlink data may be transmitted in some cases, and SRS or random access preamble transmission may be performed in uplink.

The aforementioned TDD uplink-downlink configuration is applied for each component carrier, that is, for each cell. However, when component carriers (that is, CA cells) to which carrier combining is applied use different duplex schemes, positions of subframes in which a UE can perform uplink transmission may be different for each cell.

4 illustrates an example of timing for uplink reporting when cells to which a CA is applied use different duplex schemes.

Referring to FIG. 4, a Pcell 401 and an Scell 402 configured to operate as a CA are configured for a UE, the Pcell 401 is operated in a TDD mode, and the Scell 402 is operated in an FDD mode. . The Pcell 401 is configured with a frequency f1 403 operating in the TDD mode, and the Scell 402 is configured with an uplink frequency f2 405 and a downlink frequency f3 404 for operating in the FDD mode. The Pcell 401 operates in TDD uplink-downlink configuration # 4 among the TDD uplink-downlink configurations shown in Table 1 above.

When carrier combining is applied in the LTE-A system, a reporting period of 'periodic CSI reporting' for each cell can be independently set for each cell.

In the case of FDD cells in LTE and LTE-A systems, the CSI transmission period (N pd ) for 'periodic CSI reporting' is set to one of {2, 5, 10, 20, 40, 80, 160, 32, 64, 128}. In the case of a TDD cell, the CSI transmission period N pd for 'periodic CSI reporting' may be set to one of {1, 5, 10, 20, 40, 80, 160}. The unit of the CSI transmission period is a subframe. The base station transmits a CSI transmission period (N pd ) and a subframe offset (N OFFSET, CQI ) indicating the positions of the subframes capable of 'periodic CSI reporting' in a radio frame for 'periodic CSI reporting' to the terminal. Inform in advance.

In the example of FIG. 4, CSI transmission period N pd = 5 and subframe offset N OFFSET, CQI = 0. Periodic CSI reporting of the UE is possible in a subframe that satisfies Equation 1 below.

Equation 1

Figure PCTKR2015000971-appb-M000001

Where n f represents a radio frame number and n s represents a slot number within a radio frame. Since one subframe consists of two slots, one radio frame consists of a total of 20 slots. In the example of FIG. 4, if n f = 1, the first subframe 408 (n s = 0 or 1) of the uplink frequency 405 of the Scell 402 satisfies Equation 1 as follows. do.

(10 × 1 + 0-0) mod 5 = 0

Therefore, the first subframe 408 becomes a subframe capable of periodic CSI reporting. Similarly, since the fifth subframe 409 (n s = 10 or 11) also satisfies Equation 1 (10 × 1 + 5-0) mod 5 = 0, a subframe capable of periodic CSI reporting is do.

As described above, the UCI may be transmitted only through the Pcell 401. However, the subframes 410 and 413 of the Pcell 401 corresponding to the first subframe 408 and the fifth subframe 409 of the Scell 402 are all downlink subframes, and the UE is configured to the subframes 410 and 413. It is impossible to perform 'cyclic CSI report' to the base station through the Pcell (401). That is, in the example of FIG. 4, when the periodic CSI report of the Scell 402 is CSI transmission period (N pd ) = 5 and the subframe offset (N OFFSET, CQI ) = 0, the UE may “periodically” the Scell 402. CSI reporting 'cannot be performed.

In the case of FIG. 4, the UE may perform 'periodic CSI reporting' only within the uplink subframes 411, 412, 414, and 415 of the Pcell 401.

Hereinafter, embodiments in which a UE performs "periodic CSI reporting" to a base station in a carrier combining system operating by combining a cell applying the FDD scheme and a cell applying the TDD scheme as described above.

<First Embodiment>

In a carrier combining system in which a cell applying an FDD scheme and a cell applying a TDD scheme are operated, the TDD cell is configured as a frequency f1 to operate as a Pcell (hereinafter, referred to as a TDD cell). When operating as an Scell composed of an uplink frequency f2 and a downlink frequency f3 (hereinafter, the FDD cell is referred to as an FDD Scell), a detailed operation of performing 'periodic CSI reporting' for the FDD Scell through the TDD Pcell will be described. .

The first embodiment limits the CSI transmission period N pd that can be set for the FDD Scell according to the TDD uplink-downlink configuration of the TDD Pcell. That is, according to the TDD uplink-downlink configuration of the TDD Pcell, {2, 5, 10, 20, 40, 80, which is a CSI transmission period (N pd ) that can be set for the FDD cell in the existing LTE and LTE-A systems. 160, 32, 64, 128} CSI transmission period applicable to the FDD Scell is selected.

5 (composed of FIGS. 5A and 5B) illustrates an example of an operation when a CSI transmission period is 2 subframes according to an embodiment of the present invention. The illustrated example shows that when the CSI transmission period (N pd ) = 2 subframes of the FDD Scell and the even number of subframe offsets (N OFFSET, CQI ) = 0, 2, 4, ..., each TDD upstream of the TDD Pcell It indicates whether the FDD Scell can support N pd = 2 according to the link-downlink configuration.

In the case of TDD uplink-downlink configuration # 0 in FIG. 5, when N pd = 2 and N OFFSET, CQI = even number are applied to Equation 1, a subframe that satisfies Equation 1 is a radio frame #. Subframes # 0, # 2, # 4, # 6, # 8 (500, 501, 502, 503, 504) of k 570 and subframes # 0, # 2 of radio frame # k + 1 (571) , # 4, # 6, # 8 (505, 506, 507, 508, 509). Since the uplink signal transmission of the UE is possible only in the UL subframe, subframes # 2, # 4, and # 8 of the radio frame #k 570, which are UL subframes satisfying Equation 1, are 501 and 502. , 504, and the subframes # 2, # 4, and # 8 of the radio frame # k + 1 571 (506, 507, 509), the periodic CSI reporting of the terminal is possible. Among UL subframes that satisfy Equation 1, the interval d between adjacent subframes capable of periodic CSI reporting of the UE is 2 subframes between subframe # 2501 and subframe # 4502; Four subframes, between subframe # 4502 and subframe # 8504 , at least satisfy CSI transmission period N pd = 2 at least once. That is, the TDD Scell operated by the TDD uplink-downlink configuration # 0 may partially support the CSI transmission period for the FDD Scell.

In this case, the TDD Scell operated by the TDD uplink-downlink configuration # 0 reports the 'cyclic CSI' in which the CSI transmission period (N pd ) = 2 subframes and the subframe offset (N OFFSET, CQI ) = even number of the FDD Scell. Can be defined to support '. Generalizing the conditions for determining whether periodic CSI reporting is possible is as shown in Equation 2 below.

Equation 2

Figure PCTKR2015000971-appb-M000002

Here, d ij represents an interval between adjacent subframe #i and subframe #j in which periodic CSI reporting is possible for a specific TDD uplink-downlink configuration, and min (x) represents a minimum value of x.

Referring to FIG. 5, when the TDD Pcell has a TDD uplink-downlink configuration # 1, the UE may have a subframe # 2 501 of a radio frame #k 570-> a subframe # 4 502-> Periodic CSI in the order of subframe # 8 (504)-> subframe # 2 (506)-> subframe # 4 (507)-> subframe # 8 (508) of radio frame # k + 1 (571). Report '.

Next, in the case of TDD uplink-downlink configuration # 1, when N pd = 2 and N OFFSET, CQI = 'even' are applied to Equation 1, the periodic CSI of the UE satisfying Equation 1 is applied. Reportable UL subframes include subframes # 2, # 8 (511, 514) of radio frame #k 570 and subframes # 2, # 8 (516, 519) of radio frame # k + 1 571. Becomes The interval d between the subframes is 6 subframes between subframe # 2 511 and subframe # 8 514 and 4 subframes between subframe # 8 514 and subframe # 2 516. , ..., do not satisfy Equation 2, and therefore TDD uplink-downlink configuration # 1 does not guarantee CSI transmission period (N pd ) = 2 to be applied to the FDD Scell at all.

In this case, the TDD Pcell operated with the TDD uplink-downlink configuration # 1 reports the 'cyclic CSI' with the CSI transmission period (N pd ) = 2 subframes and the subframe offset (N OFFSET, CQI ) = even for the FDD Scell. Is not supported.

Similarly, if the above operation is applied to TDD uplink-downlink configuration # 2, # 3, # 4, # 5, # 6, UL subframes satisfying Equation 1 and Equation 2 are TDD uplink. For each link-downlink configuration:

TDD uplink-downlink configuration # 2

UL subframe satisfying <Equation 1>: subframe # 2 (521) of radio frame #k (570) and subframe # 2 (526) of radio frame # k + 1 (571)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 3

UL subframe satisfying Equation 1: Subframes # 2, # 4 (531, 532) of radio frame #k (570) and subframes # 2, # 4 of radio frame # k + 1 (571) (536, 537)

UL subframe satisfying Equation 2: Subframes # 2, # 4 (531, 532) of radio frame #k (570) and subframes # 2, # 4 of radio frame # k + 1 (571) (536, 537)

Therefore, the UE in the TDD Pcell of TDD uplink-downlink configuration # 3, subframe # 2 (531)-> subframe # 4 (532) of the radio frame #k (870)-> radio frame # k + 1 ( Periodic CSI reporting is performed in the order of subframe # 2 536-> subframe # 4 537 of 571).

TDD uplink-downlink configuration # 4

UL subframe satisfying Equation 1: subframe # 2 541 of radio frame #k 570 and subframe # 2 546 of radio frame # k + 1 571

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 5

UL subframe satisfying <Equation 1>: subframe # 2 (551) of radio frame #k (570) and subframe # 2 (556) of radio frame # k + 1 (571)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 6

UL subframe satisfying Equation 1: subframes # 2, # 4, # 8 (561, 562, 564) and radio frame # k + 1 (571) of radio frame #k (570) # 2, # 4, # 8 (566, 567, 569)

UL subframe satisfying Equation 2: Subframes # 2, # 4, # 8 (561, 562, 564) and radio frame # k + 1 (571) of radio frame #k (570) # 2, # 4, # 8 (566, 567, 569)

Therefore, the UE in the TDD Pcell of TDD uplink-downlink configuration # 6, subframe # 2 (531)-> subframe # 4 (532)-> subframe # 8 (564) of the radio frame #k (870). Periodic CSI reporting is performed in the order of subframe # 2 536 of radio frame # k + 1 571, subframe # 4 537, and subframe # 8 569.

Therefore, CSI transmission period (N pd ) = 2 of the FDD Scell is;

When N OFFSET, CQI = even, it can be applied to TDD uplink-downlink configuration # 0, # 3, # 6 of TDD Pcell.

6 (composed of FIGS. 6A and 6B) illustrates another example of an operation when the CSI transmission period is 2 subframes according to an embodiment of the present invention. In the illustrated example, when CSI transmission period (N pd ) = 2 subframes of the FDD Scell and subframe offset (N OFFSET, CQI ) = odd, whether or not N pd is supported according to the TDD uplink-downlink configuration of the TDD Pcell Indicates.

Therefore, CSI transmission period (N pd ) = 2 of the FDD Scell is;

When N OFFSET, CQI = odd, it may be applied to TDD uplink-downlink configuration # 0 of the TDD Pcell.

In this case, the UE subframe # 3 (601) of the radio frame #k (670)-> subframe # 3 (603)-> subframe # 9 (604)-> subframe of the radio frame #k + 1 (671) Periodic CSI reporting is performed in the order of Frame # 3 (606)-> Subframe # 3 (608)-> Subframe # 9 (609).

In conclusion, the CSI transmission period (N pd ) = 2 of the FDD Scell may support TDD uplink-downlink configuration # 0, # 3, and # 6 in consideration of the case where N OFFSET and CQI are even or odd. .

7 illustrates an example of an operation when a CSI transmission period is 5 subframes according to an embodiment of the present invention. In the illustrated example, when CSI transmission period (N pd ) = 5 subframes of FDD Scell, and N OFFSET, CQI = any value, the FDD Scell sets N pd = 5 according to the TDD uplink-downlink configuration of the TDD Pcell. Indicates whether support is possible.

Referring to FIG. 7, UL subframes satisfying Equations 1 and 2 are as follows for each TDD uplink-downlink configuration.

TDD uplink-downlink configuration # 0

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 4, # 7, # 8, # 9 (702, 703, 704, 707, 708, and the like) of radio frame #k (770) 709)

UL subframe that satisfies Equation 2: Subframes # 2, # 3, # 4, # 7, # 8, # 9 (702, 703, 704, 707, 708) of radio frame #k (770) 709)

Accordingly, the UE may perform subframe # 2 702 of the radio frame #k (770)-> subframe # 7 (707), or subframe # 3 (703) of the radio frame #k (770)-> subframe # 8. 708, or 'cyclic CSI reporting' is performed in the order of subframe # 4 704-> subframe # 9 709 of radio frame #k 770.

TDD uplink-downlink configuration # 1

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 7, and # 8 (712, 713, 717, 718) of radio frame #k (770)

UL subframe that satisfies Equation 2: Subframes # 2, # 3, # 7, # 8 of radio frame #k (770) (712, 713, 717, 718)

Accordingly, the UE may perform subframe # 2 712 of the radio frame #k 770, subframe # 7 717, or subframe # 3 713 of the radio frame #k 770, subframe # 8. Perform periodic CSI reporting in the order of 718.

TDD uplink-downlink configuration # 2

UL subframe satisfying <Equation 1>: subframes # 2 and # 7 of radio frame #k (770) (722, 727)

UL subframe satisfying Equation 2: Subframes # 2 and # 7 of radio frame #k (770) (722, 727)

Therefore, the UE performs 'periodic CSI reporting' in the order of the subframe # 2 722 of the radio frame #k 770, the subframe # 7 727.

TDD uplink-downlink configuration # 3

UL subframe satisfying <Equation 1>: subframes # 2, # 3, and # 4 of the radio frame #k (770) (732, 733, 734)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 4

UL subframe satisfying <Equation 1>: subframes # 2, # 3 of radio frame #k (770) (742, 743)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 5

UL subframe satisfying <Equation 1>: subframe # 2 (752) of radio frame #k (770)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 6

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 4, # 7, and # 8 (762, 763, 764, 767, 768) of radio frame #k (770)

UL subframe that satisfies Equation 2: Subframes # 2, # 3, # 7, # 8 (762, 763, 767, 768) of radio frame #k (770)

Accordingly, the UE may subframe # 2 (762)-> subframe # 7 (767) of radio frame #k (770), or subframe # 3 (763)-> subframe # 8 of radio frame #k (770). Perform periodic CSI reporting in the order of 768.

In conclusion, CSI transmission period (N pd ) of FDD Scell = 5;

It can be applied to TDD uplink-downlink configuration # 0, # 1, # 2, # 6 of TDD Pcell.

8 (composed of FIGS. 8A and 8B) shows an example of an operation when a CSI transmission period is 32 subframes according to an embodiment of the present invention. In the illustrated example, when CSI transmission period (N pd ) = 32 subframes of the FDD Scell and N OFFSET, CQI = any value, the FDD Scell sets N pd = 32 according to the TDD uplink-downlink configuration of the TDD Pcell. Indicates whether support is possible.

Referring to FIG. 8, UL subframes satisfying Equations 1 and 2 are as follows for each TDD uplink-downlink configuration.

TDD uplink-downlink configuration # 0

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 4, # 7, # 8, # 9 (800, 801, 802, 803, 804, of radio frame #k (880)) 805) and subframes # 4, # 9 of radio frame # k + 3 (881) (808, 811)

UL subframe satisfying Equation 2: Subframes # 2, # 7 (800, 803) of radio frame #k (880) and subframes # 4, # 9 of radio frame # k + 3 (881) (808, 811)

Accordingly, the UE may subframe # 2 (800) of the radio frame #k (880)-> subframe # 4 (808) of the radio frame # k + 3 (881), or subframe # of the radio frame #k (880) Periodic CSI reporting is performed in the order of subframe # 9 (811) of 7803 (803)-> radio frame # k + 3 (881).

TDD uplink-downlink configuration # 1

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 7, and # 8 (820, 821, 822, 823) of radio frame #k (880)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 2

UL subframe satisfying <Equation 1>: subframes # 2, # 7 of radio frame #k (880) (830, 831)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 3

UL subframe satisfying Equation 1: subframes # 2, # 3, # 4 (840, 841, 842) and radio frame # k + 3 (881) of radio frame #k (880) # 4 (845)

UL subframe satisfying Equation 2: Subframes # 2 (840, 841, 842) of radio frame #k (880) and subframes # 4 (845) of radio frame # k + 3 (881)

Accordingly, the UE performs 'periodic CSI reporting' in the order of the subframe # 2 840 of the radio frame #k 880-> the subframe # 4 845 of the radio frame # k + 3 881.

TDD uplink-downlink configuration # 4

UL subframe satisfying <Equation 1>: subframes # 2 and # 3 of radio frame #k (880) (850, 851)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 5

UL subframe satisfying <Equation 1>: subframe # 2 (860) of radio frame #k (880)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 6

UL subframe satisfying Equation 1: subframes # 2, # 3, # 4, # 7, # 8 (870, 871, 872, 873, 874) and radio frame of radio frame #k (880) Subframe # 4 of # k + 3 (881) (877)

UL subframe satisfying Equation 2: subframe # 2 (870) of radio frame #k (880) and subframe # 4 (877) of radio frame # k + 3 (881)

Accordingly, the UE performs 'periodic CSI reporting' in the order of the subframe # 2 870 of the radio frame #k 880-> the subframe # 4 877 of the radio frame # k + 3 881.

In conclusion, the CSI transmission period (N pd ) of the FDD Scell = 32;

It can be applied to TDD uplink-downlink configuration # 0, # 3, # 6 of the TDD Pcell.

9 (composed of FIGS. 9A and 9B) illustrates an example of an operation when a CSI transmission period is 64 subframes according to an embodiment of the present invention. In the illustrated example, when the CSI transmission period (N pd ) = 64 subframes of the FDD Scell, and N OFFSET, CQI = any value, the FDD Scell is set to N pd = according to each TDD uplink-downlink configuration of the TDD Pcell. Indicates whether 64 can be supported.

Referring to FIG. 9, UL subframes satisfying Equations 1 and 2 are as follows for each TDD uplink-downlink configuration.

TDD uplink-downlink configuration # 0

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 4, # 7, # 8, # 9 (900, 901, 902, 903, 904) of radio frame #k (981) 905), subframes # 7, # 8 (909, 910) of radio frame # k + 6 (982), and subframes # 2, # 3 (912, 913) of radio frame # k + 7 (983).

UL subframe satisfying Equation 2: Subframes # 3, # 4, # 8, # 9 (901, 902, 904, 905) of radio frame #k (981), radio frame # k + 6 ( Subframes # 7, # 8 (909, 910) of 982), and subframes # 2, # 3 (912, 913) of radio frame # k + 7 (983)

Accordingly, the UE may transmit a subframe # 3 901 of a radio frame #k (981)-> a subframe # 7 (909) of a radio frame # k + 6 (982), or a subframe # of a radio frame #k (981). 4 (902)-> subframe # 8 (910) of radio frame # k + 6 (982), or subframe # 8 (904) of radio frame #k (981)-> radio frame # k + 7 (983) Subframe # 2 (912), or subframe # 9 (905) of radio frame #k (981)-> subframe # 3 (913) of radio frame # k + 7 (983). CSI reporting '.

TDD uplink-downlink configuration # 1

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 7, # 8 (920, 921, 922, 923) of radio frame #k (981), radio frame # k + 6 ( Subframes # 7, # 8 (926, 927) of 982), and subframes # 2, # 3 (928, 929) of radio frame # k + 7 (983)

UL subframe satisfying Equation 2: Subframes # 3, # 8 (921, 923) of radio frame #k (981), subframes # 7, (926) of radio frame # k + 6 (982) ), And subframe # 2 (928) in radioframe # k + 7 (983)

Accordingly, the UE may subframe # 3 (921) of the radio frame #k (981)-> subframe # 7 (926) of the radio frame #k + 6 (982), or subframe # of the radio frame #k (981) 8 (923)-> Periodic CSI reporting is performed in the order of subframe # 2 928 of radio frame # k + 7 (983).

TDD uplink-downlink configuration # 2

UL subframe satisfying <Equation 1>: subframes # 2 and # 7 of radio frame #k (981) (930, 931)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 3

UL subframe satisfying <Equation 1>: subframes # 2, # 3, and # 4 of the radio frame #k (981) (940, 941, 942)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 4

UL subframe satisfying Equation 1: Subframes # 2 and # 3 of radio frame #k (981) (950, 951)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 5

UL subframe satisfying <Equation 1>: subframe # 2 (960) of radio frame #k (981)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 6

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 4, # 7, # 8 (970, 971, 972, 973, 974) of radio frame #k (981), radio frame Subframes # 7, # 8 (978, 979) in # k + 6 (982), and Subframes # 2 (980) in radio frame # k + 7 (983)

UL subframe satisfying Equation 2: Subframes # 3, # 4, # 8 (971, 972, 974) of radio frame #k (981), subframe of radio frame # k + 6 (982) # 7, # 8 (978, 979), and subframe # 2 (980) in radio frame # k + 7 (983)

Accordingly, the UE may subframe # 3 (971) of the radio frame #k (981)-> subframe # 7 (978) of the radio frame #k + 6 (982), or subframe # of the radio frame #k (981) 4 (972)-> subframe # 8 (979) of radio frame # k + 6 (982), or subframe # 8 (974) of radio frame #k (981)-> radio frame # k + 7 (983) 'Cyclic CSI reporting' is performed in the order of subframe # 2 (980).

In conclusion, CSI transmission period (N pd ) = 64 of FDD Scell is;

It can be applied to TDD uplink-downlink configuration # 0, # 1, # 6 of TDD Pcell.

10 (composed of FIGS. 10A and 10B) illustrates an example of an operation when a CSI transmission period is 128 subframes according to an embodiment of the present invention. In the illustrated example, when CSI transmission period (N pd ) = 128 subframes of the FDD Scell and N OFFSET, CQI = any value, the FDD Scell sets N pd = 128 according to the TDD uplink-downlink configuration of the TDD Pcell. Indicates whether support is possible.

Referring to FIG. 10, UL subframes satisfying Equations 1 and 2 are as follows for each TDD uplink-downlink configuration.

TDD uplink-downlink configuration # 0

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 4, # 7, # 8, and # 9 of the radio frame #k (1080) (1000, 1001, 1002, 1003, 1004, 1005), subframes # 2, # 7 of radioframe # k + 13 (1081) (1006, 1009)

UL subframe satisfying Equation 2: Subframes # 4, # 9 (1002, 1005) of radio frame #k (1080), subframes # 2, # 7 of radio frame # k + 13 (1081) (1006, 1009)

Accordingly, the UE may subframe # 4 (1002) of the radio frame #k (1080)-> subframe # 2 (1006) of the radio frame # k + 13 (1081), or subframe # of the radio frame #k (1080). Periodic CSI reporting is performed in the order of 9 (1005)-> subframe # 7 1009 of radio frame # k + 13 (1081).

TDD uplink-downlink configuration # 1

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 7, and # 8 of radio frame #k (1080) (1020, 1021, 1022, 1023)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 2

UL subframe satisfying <Equation 1>: subframes # 2 and # 7 of radio frame #k (1080) (1030, 1031)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 3

UL subframe satisfying Equation 1: subframes # 2, # 3, # 4 (1040, 1041, 1042) of radio frame #k (1080), subframe of radio frame # k + 13 (1081) # 2 (1043)

UL subframe that satisfies Equation 2: subframe # 4 (1042) of radio frame #k (1080), subframe # 2 (1043) of radio frame # k + 13 (1081)

Accordingly, the UE performs "periodic CSI reporting" in the order of the subframe # 4 1042 of the radio frame #k 1080-> the subframe # 2 1043 of the radio frame # k + 13 1081.

TDD uplink-downlink configuration # 4

UL subframe satisfying <Equation 1>: subframes # 2 and # 3 of radio frame #k (1080) (1050, 1051)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 5

UL subframe satisfying <Equation 1>: subframe # 2 (1060) of radio frame #k (1080)

UL subframe that satisfies Equation 2: None.

TDD uplink-downlink configuration # 6

UL subframe satisfying <Equation 1>: subframes # 2, # 3, # 4, # 7, # 8 (1070, 1071, 1072, 1073, 1074) of radio frame #k (1080), radio frame Subframe # 2 of # k + 13 (1031) (1075)

UL subframe satisfying Equation 2: subframe # 7 (1072) of radio frame #k (1080), subframe # 2 (1075) of radio frame # k + 13 (1031)

Accordingly, the UE performs "periodic CSI reporting" in the order of the subframe # 4 1072 of the radio frame #k 1080-> the subframe # 2 1075 of the radio frame # k + 13 1081.

In conclusion, the CSI transmission period (N pd ) of the FDD Scell = 128;

It can be applied to TDD uplink-downlink configuration # 0, # 3, # 6 of the TDD Pcell.

Since all TDD uplink-downlink configurations satisfy a periodicity of 10 ms, {10, 20, 40, 80, 160} for which the CSI transmission period (N pd ) of the FDD Scell corresponds to a multiple of 10 corresponds to all TDD uplink- Applicable to downlink configuration.

In summary, the TDD uplink-downlink configuration applicable to each CSI transmission period N pd of the FDD Scell in the first embodiment may be summarized as shown in Table 2 below.

TABLE 2

Figure PCTKR2015000971-appb-T000002

In other words, when the TDD Pcell has TDD uplink-downlink configuration # 0, N pd of the FDD Scell may be selected from {2,5,32,64,128} and {10,20,40,80,160}, and TDD When the Pcell has a TDD uplink-downlink configuration # 1, the N pd of the FDD Scell may be selected from {5, 64} and {10,20,40,80,160}, and the TDD Pcell is a TDD uplink-downlink In case of having configuration # 2, N pd of FDD Scell may be selected from {5} and {10,20,40,80,160}, and when TDD Pcell has TDD uplink-downlink configuration # 3, N of FDD Scell pd may be selected from {2,32,128} and {10,20,40,80,160}, and if the TDD Pcell has TDD uplink-downlink configuration # 4,5, N pd of the FDD Scell is {10,20 And, if the TDD Pcell has a TDD uplink-downlink configuration # 6, N pd of the FDD Scell is {2,5,32,64,128} and {10,20,40,80,160 } Can be selected from.

11 illustrates a setting operation of a CSI transmission period N pd according to an embodiment of the present invention.

Referring to FIG. 11, in step 1100, the base station identifies a TDD uplink-downlink configuration defined for a TDD Pcell of a terminal. The TDD uplink-downlink configuration may be determined in consideration of the uplink-downlink traffic situation of the TDD Pcell, the state of the TDD uplink-downlink configuration of neighboring cells, etc. at the time when the TDD Pcell is configured for the UE. Can be.

In step 1102, the base station determines the CSI transmission period (N pd ) to be set for the FDD Scell. In more detail, the base station may select one of {2, 5, 10, 20, 40, 80, 160, 32, 64, 128} that can be set for the FDD cell.

In step 1104, the base station evaluates whether UL subframes of the TDD Pcell satisfying Equation 1 are satisfied from Equation 2 from the CSI transmission period N pd . If the <Equation 2> is satisfied, the base station information on the decision in step 1106 to the CSI transmission period (N pd) of the FDD Scell the CSI transmission period (N pd), and the determined CSI transmission period in 1110 steps Is transmitted in a predetermined signaling message to the terminal. On the other hand, if Equation 2 is not satisfied, in step 1108, the base station returns to step 1102 to set the CSI transmission period again.

In another embodiment, when the Pcell configured for the UE is in the TDD mode and the Scell is in the FDD mode, the base station identifies a TDD uplink-downlink configuration of the TDD Pcell and may be used for the TDD uplink-downlink configuration. Acquire a CSI transmission period set of the FDD Scell. As an example, the base station may include a memory that previously stores sets of CSI transmission periods for each TDD uplink-downlink configuration of the TDD Pcell based on <Table 2>. Then, the CSI transmission period of the FDD Scell is selected according to a predetermined condition from the obtained set.

Second Embodiment

In a carrier combining system in which a cell applying an FDD scheme and a cell applying a TDD scheme are operated, the TDD cell is configured as a frequency f1 to operate as a Pcell (hereinafter, referred to as a TDD cell). When operating as an Scell composed of an uplink frequency f2 and a downlink frequency f3 (hereinafter, the FDD cell is referred to as an FDD Scell), a detailed operation of performing 'periodic CSI reporting' for the FDD Scell through the TDD Pcell will be described. .

In the second embodiment, the CSI transmission period N pd configurable for the FDD Scell is not limited by the TDD uplink-downlink configuration of the TDD Pcell, but is possible for the FDD cell as in the existing LTE and LTE-A systems. {2, 5, 10, 20, 40, 80, 160, 32, 64, 128}. The UE performs 'periodic CSI reporting' in the UL subframe of the TDD Pcell satisfying Equation 1. Therefore, in some cases, CSI reporting of the UE may occur at a time interval longer than the CSI transmission period set by the base station.

As an example, referring to FIG. 5, CSI transmission period (N pd ) = 2 and subframe offset (N OFFSET, CQI ) = even for an FDD Scell, and the TDD Pcell includes TDD uplink-downlink configuration # 4. In this case, the UL subframe that satisfies Equation 1, in which 'periodical CSI reporting' is possible, is a subframe of subframe # 2 (541) and radio frame # k + 1 (571) of radio frame #k (570). # 2 (546). Accordingly, the UE performs CSI reporting in the order of the subframe # 2 541 of the radio frame #k 570-> the subframe # 2 546 of the radio frame # k + 1 571. The time interval between subframe # 2 541 of radio frame #k 570 and subframe # 2 546 of radio frame # k + 1 571 is 10 subframes. One CSI transmission period (N pd ) = longer than 2. That is, the CSI transmission period (N pd ) that the base station can set for the FDD Scell is not limited, but the CSI transmission period actually generated by the terminal may be long.

Third Embodiment

In a carrier combining system in which a cell applying an FDD scheme and a cell applying a TDD scheme are operated, a TDD cell is configured with a frequency f1 to operate as a Pcell (hereinafter, referred to as a TDD cell). When operating as an Scell composed of an uplink frequency f2 and a downlink frequency f3 (hereinafter, the FDD cell is referred to as an FDD Scell), a detailed operation of performing 'periodic CSI reporting' for the FDD Scell through the TDD Pcell will be described. .

In the third embodiment, in case of carrier combining, the CSI transmission period (N pd ) applicable to the FDD Scell is {2, 5, 10, 20, 40, 80, 160, 32 determined for the FDD cell of the single-carrier. 64, 128}, but not based on a separate set determined in consideration of possible CSI transmission periods of the TDD cell.

Method 1: CSI transmission period which can be applied to FDD Scell (N pd) is selected from CSI transmission period (N pd) that can be applied to TDD Pcell. That is, the set of CSI transmission periods (N pd ) applicable to the FDD Scell is {1, 5, 10, 20, 40, 80, 160}. When the base station determines N pd for the FDD Scell configured for the terminal, it selects one element of the set, and signals the information about the selected N pd to the terminal. The UE performs 'periodic CSI reporting' in the UL subframe of the TDD Pcell satisfying Equation 1 based on N pd indicated by the base station. Here, N pd = 1 means that CSI reporting is performed in all UL subframes of the TDD Pcell.

Method 2: The CSI transmission period (N pd ) applicable to the FDD Scell is selected from {5, 10, 20, 40, 80, 160} which is a set applicable in common to the TDD cell and the FDD cell. When the base station determines N pd for the FDD Scell configured for the terminal, it selects one element of the set, and signals the information about the selected N pd to the terminal. The UE performs 'periodic CSI reporting' in the UL subframe of the TDD Pcell satisfying Equation 1 based on N pd indicated by the base station.

According to the third embodiment, the base station and the terminal set the CSI transmission period (N pd ) applied to the FDD Scell or FDD cell according to whether carrier combining of the TDD cell and the FDD cell is configured.

12 is a flowchart illustrating a setting operation of a CSI transmission period according to another embodiment of the present invention. The flowchart shown here may be common to both the base station and the terminal.

Referring to FIG. 12, in operation 1200, the base station determines whether carrier combining of a TDD cell and an FDD cell is configured for the terminal. If the carrier combining of the TDD cell and the FDD cell is configured, in step 1202, the base station determines the CSI transmission period (N pd ) applied to the FDD Scell by using {1, 5, 10, 20, 40, 80, 160 of Method 1 described above. } Or {5, 10, 20, 40, 80, 160} of the method 2.

On the other hand, when the carrier coupling between the TDD cell and the FDD cell is not configured, that is, when the FDD cell is configured alone for the UE or when the carrier coupling between the FDD cell and the FDD cell is configured, the base station is applied to the FDD Scell in step 1204. the (N pd) CSI transmission period that is set based on the set of CSI transmission period (N pd) defined for FDD cell in the existing LTE and LTE-a system.

In step 1206, the base station may transmit the information on the set N pd to the terminal. Then, the UE periodically reports the CSI for the FDD Scell in the UL subframe of the TDD Pcell satisfying Equation 1 based on the received N pd .

In a selectable embodiment, when the terminal is configured to select N pd through the same algorithm used in the base station, the base station may omit step 1206 of transmitting information on the N pd , and the terminal may transmit the N pd from the base station. N pd may be determined by itself without receiving information, and the CSI for the FDD Scell may be periodically reported using the determined N pd .

Referring to FIG. 12, in operation 1200, the UE determines whether carrier combining of the TDD cell and the FDD cell is set by the base station. If carrier combining is set between the TDD cell and the FDD cell, in step 1202, the UE determines the CSI transmission period (N pd ) applied to the FDD Scell by using {1, 5, 10, 20, 40, 80, 160 of Method 1 described above. } Or {5, 10, 20, 40, 80, 160} of the method 2.

On the other hand, when the carrier coupling between the TDD cell and the FDD cell is not configured, that is, when the FDD cell is configured alone for the UE or when the carrier coupling between the FDD cell and the FDD cell is configured, the UE applies the FDD Scell in step 1204. the CSI transmission period (N pd), which is set based on the set of CSI transmission period (N pd) defined for FDD cell in the existing LTE and LTE-a system.

In step 1206, the UE performs 'cyclic CSI report' for the FDD Scell based on the set N pd . As a selectable embodiment, instead of setting N pd by itself, the UE may receive information on N pd from the base station and perform 'periodic CSI report' on the FDD Scell based on the received N pd .

Fourth Example

In a carrier combining system in which a cell applying an FDD scheme and a cell applying a TDD scheme are operated, the TDD cell is configured with a frequency f1 to operate as an Scell (hereinafter referred to as the TDD cell as a TDD Scell). When operating as a Pcell composed of an uplink frequency f2 and a downlink frequency f3 (hereinafter referred to as an FDD cell), a detailed operation of performing 'cyclic CSI reporting' for a TDD Scell through an FDD Pcell will be described. .

The CSI transmission period (N pd ) for the TDD Scell may be set to one of the CSI transmission periods (N pd ) applicable to the TDD cell, regardless of the carrier coupling configuration. That is, one of {1, 5, 10, 20, 40, 80, 160} configurable for the TDD cells of the existing LTE and LTE-A systems is selected as N pd of the TDD Scell, and the base station is assigned to the selected N pd . Information about the signal to the terminal. The UE performs 'periodic CSI report' in the UL subframe of the FDD Pcell satisfying Equation 1 based on N pd indicated by the base station. Therefore, periodic CSI reporting for the TDD Scell may be performed every N subframes (N pd = 1) through the FDD Pcell.

Fifth Embodiment

In a carrier combining system in which a cell applying an FDD scheme and a cell applying a TDD scheme are operated, the TDD cell is configured with a frequency f1 to operate as an Scell (hereinafter referred to as the TDD cell as a TDD Scell). When operating as a Pcell composed of an uplink frequency f2 and a downlink frequency f3 (hereinafter referred to as an FDD cell), a detailed operation of performing 'cyclic CSI reporting' for a TDD Scell through an FDD Pcell will be described. .

If the carrier binding is set, and can be set to one of the CSI transmission period for TDD Scell (N pd) is, CSI transmission period which can be applied to FDD Pcell (N pd). That is, in case of carrier combining of TDD Scell and FDD Pcell, one of {2, 5, 10, 20, 40, 80, 160, 32, 64, 128} that can be set for FDD cells of existing LTE and LTE-A systems. Is selected as N pd of the TDD Scell, and the base station signals the information on the selected N pd to the terminal. The UE performs 'periodic CSI report' in the UL subframe of the FDD Pcell satisfying Equation 1 based on N pd indicated by the base station. Therefore, in case of carrier combining, the UE may perform periodic CSI reporting on the TDD Scell with N pd = {2, 32, 64, 128} which is not defined for the TDD cells of the existing LTE and LTE-A systems through the FDD Pcell. have.

Sixth Embodiment

In a carrier combining system in which a cell applying an FDD scheme and a cell applying a TDD scheme are operated together, a TDD cell is configured as a frequency f1 and operates as an Scell (hereinafter, the TDD cell is referred to as a TDD Scell). In the case of operating as a Pcell by configuring an uplink frequency f2 and a downlink frequency f3 (hereinafter, the FDD cell is referred to as an FDD Pcell), a detailed operation of performing 'cyclic CSI reporting' for the TDD Scell through the FDD Pcell will be described. .

In the sixth embodiment, in case of carrier combining, the CSI transmission period (N pd ) applicable to the TDD Scell is {1, 5, 10, 20, 40, 80, 160} determined for the TDD cell of the single-carrier. Rather, it is set based on a separate set determined in consideration of possible CSI transmission periods of the FDD cell.

Method 1: CSI transmission period which can be applied to TDD Scell (N pd) is selected from CSI transmission period (N pd) that are applicable to FDD Pcell. That is, the set of CSI transmission periods (N pd ) applicable to the TDD Scell is {2, 5, 10, 20, 40, 80, 160, 32, 64, 128}. When the base station determines N pd for the TDD Scell configured for the terminal, it selects one element of the set, and signals the information about the selected N pd to the terminal. The UE performs 'periodic CSI reporting' in the UL subframe of the FDD Pcell satisfying Equation 1 based on N pd indicated by the base station. Therefore, in case of carrier combining, the UE may perform periodic CSI reporting on the TDD Scell with N pd = {2, 32, 64, 128} for the TDD cell of the existing LTE and LTE-A systems through the FDD Pcell. Can be.

Method 2: The CSI transmission period (N pd ) applicable to the TDD Scell is selected from {5, 10, 20, 40, 80, 160} that are commonly applicable to the TDD cell and the FDD cell. When the base station determines N pd for the TDD Scell configured for the terminal, it selects one element of the set and signals the information about the selected N pd to the terminal. The UE performs 'periodic CSI report' in the UL subframe of the FDD Pcell satisfying Equation 1 based on N pd indicated by the base station.

According to the sixth embodiment, the base station and the terminal set the CSI transmission period (N pd ) applied to the TDD Scell or TDD cell according to whether carrier combining of the TDD cell and the FDD cell is configured. That is, when carrier coupling between the TDD cell and the FDD cell is set, the CSI transmission period N pd applied to the TDD Scell is set by Method 1 or Method 2. If the carrier coupling between the TDD cell and the FDD cell is not configured, that is, when the TDD cell is operated alone or when the carrier coupling between the TDD cell and the TDD cell is configured, the CSI transmission period (N pd ) applied to the TDD cell is determined by the existing LTE and It is selected from the CSI transmission period (N pd ) defined for the TDD cell of the LTE-A system.

13 is a flowchart illustrating a setting operation of a CSI transmission period according to another embodiment of the present invention. The flowchart shown here may be common to both the base station and the terminal.

Referring to FIG. 13, in operation 1300, the base station determines whether carrier combining of a TDD cell and an FDD cell is configured for the terminal. If the carrier combining of the TDD cell and the FDD cell is configured, in step 1302, the base station determines the CSI transmission period (N pd ) applied to the TDD Scell by using {2, 5, 10, 20, 40, 80, 160, 32, 64, 128} or {5, 10, 20, 40, 80, 160} in Method 2.

On the other hand, when the carrier coupling between the TDD cell and the FDD cell is not configured, that is, when the TDD cell is configured alone for the UE or when the carrier coupling between the TDD cell and the TDD cell is configured, the base station is applied to the TDD cell in step 1304. the (N pd) CSI transmission period that is set based on the set of CSI transmission period (N pd) is defined for the TDD cell in the conventional LTE and LTE-a system.

In step 1306, the base station may transmit the information on the set N pd to the terminal. Then, the UE periodically reports the CSI for the TDD Scell in the UL subframe of the FDD Pcell satisfying Equation 1 based on the received N pd .

As a selectable embodiment, when the terminal is configured to select N pd through the same algorithm used in the base station, the base station may omit step 1306 of transmitting information on the N pd , and the terminal may transmit the N pd from the base station. N pd may be determined by itself without receiving information, and the CSI for the TDD Scell may be periodically reported using the determined N pd .

Referring to FIG. 13, in operation 1300, the UE determines whether carrier combining of the TDD cell and the FDD cell is set by the base station. If the carrier coupling between the TDD cell and the FDD cell is configured, in step 1302, the UE determines the CSI transmission period (N pd ) applied to the TDD Scell by using {2, 5, 10, 20, 40, 80, 160 of Method 1 described above. , 32, 64, 128} or {5, 10, 20, 40, 80, 160} in Method 2.

On the other hand, when the carrier coupling between the TDD cell and the FDD cell is not configured, that is, when the TDD cell is configured alone for the UE or when the carrier coupling between the TDD cell and the TDD cell is configured, the UE is applied to the TDD Scell in step 1304. the (N pd) CSI transmission period that is set based on the set of CSI transmission period (N pd) is defined for the TDD cell in the conventional LTE and LTE-a system.

In step 1306, the UE performs 'cyclic CSI report' for the TDD Scell based on the set N pd . As a selectable embodiment, instead of setting N pd by itself, the UE may receive information on N pd from the base station and perform 'periodic CSI report' on the TDD Scell based on the received N pd .

14 is a flowchart illustrating an operation of a UE performing 'periodic CSI reporting' according to an embodiment of the present invention.

Referring to FIG. 14, in step 1400, the UE acquires TDD uplink-downlink configuration information and CSI report configuration information from a base station. The CSI report setting information indicates at least one of a CSI transmission period (N pd ) and a subframe offset (N OFFSET, CQI ). In step 1402, the UE determines the transmission time for periodic CSI reporting. In this case, the UE may determine the time of CSI transmission according to any one of the above-described embodiments. If it is necessary to perform 'cyclic CSI report' in subframe #n, the UE determines whether PUSCH transmission should be performed in subframe #n at 1404. If it is determined that the PUSCH should be transmitted in subframe #n, the UE transmits the CSI in the PUSCH to the base station in subframe #n in step 1406. If there is no PUSCH transmission in subframe #n as a result of the determination in step 1404, the UE transmits CSI through PUCCH in subframe #n in step 1408.

15 is a block diagram showing the configuration of a terminal transmission apparatus according to an embodiment of the present invention. For convenience of description, components that are not directly related to the present invention will not be shown and described.

Referring to FIG. 15, the UE 1500 may include a TDD cell transmitter 1502 and a PUCCH block 1512 including a PUCCH block 1504, a multiplexer 1506, and a transmit radio frequency (RF) block 1508. It consists of a firearm 1514, an FDD cell transmitter 1510 including a transmit RF block 1516 and a controller 1520. The controller 1520 is configured with each of the FDD cell transmitter 1510 and the TDD cell transmitter 1502 according to any one of the embodiments described above with respect to the 'cyclic CSI report' of the terminal with reference to the control information received from the base station. Control the blocks. The control information includes at least one of TDD uplink-downlink configuration information and CSI report configuration information, according to an applied embodiment.

In the TDD cell transmitter 1502, the PUCCH block 1504 generates a PUCCH signal containing CSI when the TDD Pcell is configured for the UE by the base station. When there is another uplink transmission signal transmitted to a TDD cell, the UE multiplexes the PUCCH signal with the other uplink transmission signal by the multiplexer 1506 and then signal-processes the transmission RF block 1508. Transmit to base station.

In the FDD cell transmitter 1510, the PUCCH block 1512 generates a PUCCH signal containing CSI when the FDD Pcell is configured for the UE by the base station. If there is another uplink transmission signal transmitted to the FDD cell, the UE multiplexes the PUCCH signal with the other uplink transmission signal in the multiplexer 1514 and then signal-processes the transmission RF block 1516 and then the base station. To send.

16 is a block diagram showing the configuration of a base station receiver according to an embodiment of the present invention. For convenience of description, components that are not directly related to the present invention will not be shown and described.

Referring to FIG. 16, the base station 1600 includes a TDD cell receiver 1602, a PUCCH block 1612, and a demultiplexer 1614 including a PUCCH block 1604, a demultiplexer 1606, and a reception RF block 1608. And an FDD cell receiver 1610 and a controller 1620 including a receive RF block 1618. The controller 1620 controls the respective building blocks of the TDD cell receiver 1602 and the FDD cell receiver 1610 according to any one of the above-described embodiments so that the base station can receive the CSI transmitted by the terminal. Although not shown, the controller 1620 may transmit at least one of the TDD uplink-downlink configuration information and the CSI report configuration information to the terminal through a separate transmitter (not shown), according to an embodiment.

When the TDD Pcell is configured for the UE, the TDD cell receiver 1602 processes the signal received from the UE in the reception RF block 1608, separates the PUCCH signal through the demultiplexer 1606, and then uses the PUCCH block ( At 1604, CSI is obtained from the PUCCH signal.

When the FDD cell receiver 1610 is configured for the UE, the FDD cell receiver 1610 processes the signal received from the UE in the received RF block 1618, separates the PUCCH signal through the demultiplexer 1614, and then uses the PUCCH block ( In 1612, CSI is obtained from the PUCCH signal.

Seventh Example

The seventh embodiment describes a method of determining a subframe offset (N OFFSET, CQI ) for CSI reporting of an Scell when carrier combining the TDD cell and the FDD cell is configured. In detail, the subframe offset (N OFFSET, CQI ) for CSI reporting of the Scell may be determined using the method for determining the CSI transmission period (N pd ) for the CSI reporting of the Scell defined in the first to sixth embodiments. In the system, the base station provides relevant information for periodic CSI reporting to the terminal through cqi-pmi-ConfigIndex (ICQI / PMI), which is a parameter transmitted to the terminal through higher layer signaling, for example, RRC (Radio Resource Control) signaling. . The relevant information for the CSI report indicates a CSI transmission period (N pd ) and a subframe offset (N OFFSET, CQI ). cqi-pmi-ConfigIndex is a parameter used to determine how often the UE reports CQI and PMI in CSI through PUCCH.

<Table 3><Table4> are each mapped between ICQI / PMI and N pd and N OFFSET, CQI defined for FDD cell and a TDD cell in the LTE system (mapping of ICQI / PMI to N pd and N OFFSET, CQI ) relationship. For example, for non-FDD cell to the carrier binding, received UE signal the ICQI / PMI = 2 from the base station, the mobile station the information for periodic CSI report of the FDD cells by <Table 3> N pd = 5, N OFFSET, CQI = 0 The base station similarly determines the relevant information for periodic CSI reporting of the FDD cell according to Table 3, and then expects the CSI to be received from the terminal at the determined timing.

Table 3 below shows the mapping of ICQI / PMI to N pd and N OFFSET and CQI for FDD.

TABLE 3

Figure PCTKR2015000971-appb-T000003

Table 4 below shows the mapping of ICQI / PMI to N pd and N OFFSET and CQI for TDD.

Table 4

Figure PCTKR2015000971-appb-T000004

By using <Table 3> and <Table 4>, in the carrier combining system operating TDD Pcell and FDD Scell by combining a cell applying FDD scheme and a cell applying TDD scheme, 'cyclic CSI' for FDD Scell In the case of performing 'reporting' through the TDD Pcell , a detailed determination method of N pd , N OFFSET, and CQI will be described in each case of the first to third embodiments.

In case of the first embodiment: The UE determines N pd , N OFFSET, CQI for periodic CSI reporting of FDD Scell by <Table 3>. However, as defined in the first embodiment, N pd that can be set for the FDD Scell is limited according to the TDD uplink-downlink configuration of the TDD Pcell.

In case of the second embodiment: The UE determines N pd , N OFFSET, CQI for periodic CSI reporting of FDD Scell by <Table 3>.

In the case of Method 1 of the third embodiment: The UE determines N pd , N OFFSET, and CQI for periodic CSI reporting of FDD Scell by using Table 4 below.

In case of Method 2 of the third embodiment: The UE determines N pd , N OFFSET, and CQI for periodic CSI reporting of FDD Scell as one of <Table 5>, <Table 6>, and <Table 7>. Which table is used in Tables 5, 6, and 7 may be defined as a standard, or may be promised through signaling between the base station and the terminal. <Table 5> is a form in which N pd = 1 is removed from <Table 4>. <Table 6> is a form in which N pd = 2, 32, 64, 128 is removed from <Table 3>. <Table 7> is a reconstruction of N pd composed of N pd = 5, 10, 20, 40, 80, 160 and N OFFSET, CQI corresponding to N pd .

Table 5

Figure PCTKR2015000971-appb-T000005

Table 6

Figure PCTKR2015000971-appb-T000006

TABLE 7

Figure PCTKR2015000971-appb-T000007

By using <Table 3> and <Table 4>, in the carrier combining system operating the FDD Pcell and the TDD Scell by combining the cell applying the FDD scheme and the cell applying the TDD scheme, the 'cyclic CSI' for the TDD Scell In case of performing 'reporting' through the FDD Pcell , a specific method of determining N pd , N OFFSET, and CQI will be described for each of the fourth to sixth embodiments.

In case of the fourth embodiment: The UE determines N pd , N OFFSET, CQI for periodic CSI reporting of TDD Scell by using <Table 4>.

In case of the fifth embodiment: The UE determines N pd , N OFFSET, CQI for periodic CSI reporting of TDD Scell by using <Table 3>.

For Method 1 of Embodiment 6, the UE determines N pd , N OFFSET, CQI for periodic CSI reporting of TDD Scell by using Table 3 below.

In the case of Method 2 of the sixth embodiment: N pd and N OFFSET, CQI for periodic CSI reporting of TDD Scell are determined according to one of <Table 5>, <Table 6>, and <Table 7>. Which table is used in <Table 5>, <Table 6> and <Table 7> may be defined as a communication standard or may be promised through signaling between the base station and the terminal.

If the terminal receives a value other than N pd defined in the first to seventh embodiment as the CSI transmission period of the Scell from the base station, the terminal cannot perform the periodic CSI transmission of the Scell.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention. That is, it will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented.

Claims (18)

  1. A method of receiving a channel state in a cellular wireless communication system,
    Setting a carrier coupling between a primary cell of a first duplication mode and a secondary cell of a second duplication mode for a terminal; and based on a first set of channel state information (CSI) transmission periods defined for the first duplication mode Determining a CSI transmission period of the secondary cell;
    And transmitting the information on the determined CSI transmission period to the terminal.
  2. The method of claim 1,
    When the cell of the first duplication mode is configured alone or the carrier combination of the cells of the first duplication mode is configured for the terminal, each of the first duplication mode based on the first set of CSI transmission periods And determining the CSI transmission period of the cell.
  3. 2. The method of claim 1, wherein when the cell of the second duplex mode is configured alone for the UE or when carrier combining of the cells of the second duplex mode is set, the second set of CSI transmission periods is based on the second set of CSI transmission periods. 2. The method of claim 2, further comprising determining a CSI transmission period of each cell in a duplex mode.
  4. The method of claim 1,
    And receiving the CSI for the secondary cell from the terminal through the primary cell in a subframe determined according to the CSI transmission period.
  5. The method of claim 4, wherein the CSI for the secondary cell is received from the terminal through an uplink control channel.
  6. The method of claim 1,
    If there is a scheduled uplink shared channel in a subframe determined according to the CSI transmission period, receiving uplink data and CSI for the secondary cell from the terminal through the scheduled uplink shared channel; How to receive channel status.
  7. A method for reporting channel state (CSI) by a terminal in a cellular wireless communication system,
    Receiving, from a base station, configuration information for setting carrier coupling between a primary cell of a first duplication mode and a secondary cell of a second duplication mode;
    Receiving information indicating a CSI transmission period for periodic CSI reporting of the secondary cell from the base station;
    Reporting the CSI of the secondary cell to the base station according to the CSI transmission period;
    The CSI transmission period of the secondary cell is determined based on a first set of channel state information (CSI) transmission periods defined for the first duplication mode.
  8. The method of claim 7, wherein
    When the cell of the first duplication mode is configured alone or the carrier combining of the cells of the first duplication mode is configured for the terminal, the CSI transmission period of each cell of the first duplication mode is the CSI transmission period. Channel status reporting method, characterized in that it is determined based on a first set of the &lt; RTI ID = 0.0 &gt;
  9. 8. The CSI transmission period of claim 7, wherein when a cell of the second duplication mode is configured alone or carrier combining of cells of the second duplication mode is configured for the terminal, the CSI transmission period of each cell of the second duplication mode. Is determined based on the second set of CSI transmission periods.
  10. The method of claim 7, wherein the reporting process,
    And transmitting the CSI for the secondary cell to the base station through the primary cell in a subframe determined according to the CSI transmission period.
  11. 15. The method of claim 14, wherein the CSI for the secondary cell is transmitted to the base station through an uplink control channel.
  12. The method of claim 7, wherein the reporting process,
    If there is an uplink shared channel scheduled in a subframe determined according to the CSI transmission period, transmitting uplink data and CSI for the secondary cell to the base station through the scheduled uplink shared channel. How to report.
  13. The method of claim 1 or 7, wherein the first set is {1, 5, 10, 20, 40, 80, 160},
    The second set is {2, 5, 10, 20, 40, 80, 160, 32, 64, 128}.
  14. The method of claim 1 or 7, wherein the first set is {2, 5, 10, 20, 40, 80, 160, 32, 64, 128},
    And the second set is {1, 5, 10, 20, 40, 80, 160}.
  15. The method of claim 1 or 7, wherein the first set is {2, 5, 10, 20, 40, 80, 160, 32, 64, 128} or {5, 10, 20, 40, 80, 160 },
    And the second set is {1, 5, 10, 20, 40, 80, 160}.
  16. The method of claim 1 or 7, wherein the determined information on the CSI transmission period,
    Includes a configuration index for periodic CSI reporting.
    The configuration index is mapped to a combination of the determined CSI transmission period and a subframe offset indicating a position of subframes capable of periodic CSI reporting.
  17. A base station apparatus for controlling channel status reporting in a cellular wireless communication system,
    Set carrier coupling between a primary cell of a first duplication mode and a secondary cell of a second duplication mode for a terminal, and based on a first set of channel state information (CSI) transmission periods defined for the first duplication mode A controller for determining the CSI transmission period of the secondary cell;
    And a transmitter for transmitting the information on the determined CSI transmission period to the terminal.
  18. A terminal device for reporting a channel state (CSI) in a cellular wireless communication system,
    Receives, from the base station, configuration information for setting carrier coupling between the primary cell in the first duplex mode and the secondary cell in the second duplex mode, and receives information indicating the CSI transmission period for periodic CSI reporting of the secondary cell from the base station. Receiving unit to say,
    A transmission unit for reporting the CSI of the secondary cell to the base station according to the CSI transmission period;
    The CSI transmission period of the secondary cell is determined based on a first set of channel state information (CSI) transmission periods defined for the first duplication mode.
PCT/KR2015/000971 2014-01-29 2015-01-29 Method and apparatus for reporting channel status in cellular radio communication system WO2015115830A1 (en)

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JP2016549042A JP6619344B2 (en) 2014-01-29 2015-01-29 Channel state reporting method and apparatus in cellular radio communication system
EP15743290.7A EP3101943A4 (en) 2014-01-29 2015-01-29 Method and apparatus for reporting channel status in cellular radio communication system
US15/115,160 US10292178B2 (en) 2014-01-29 2015-01-29 Method and apparatus for reporting channel status in cellular radio communication system
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120106404A1 (en) * 2010-11-01 2012-05-03 Qualcomm Incorporated Fdd and tdd carrier aggregation
WO2012109195A2 (en) * 2011-02-07 2012-08-16 Interdigital Patent Holdings, Inc. Method and apparatus for operating supplementary cells in licensed exempt spectrum
US20120257524A1 (en) * 2011-04-11 2012-10-11 Qualcomm Incorporated Csi reporting for multiple carriers with different system configurations
WO2013043022A2 (en) * 2011-09-23 2013-03-28 엘지전자 주식회사 Method for transmitting control information and apparatus for same
US20130315114A1 (en) * 2011-02-10 2013-11-28 Lg Electronics Inc. Method and device for scheduling in carrier aggregate system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120106404A1 (en) * 2010-11-01 2012-05-03 Qualcomm Incorporated Fdd and tdd carrier aggregation
WO2012109195A2 (en) * 2011-02-07 2012-08-16 Interdigital Patent Holdings, Inc. Method and apparatus for operating supplementary cells in licensed exempt spectrum
US20130315114A1 (en) * 2011-02-10 2013-11-28 Lg Electronics Inc. Method and device for scheduling in carrier aggregate system
US20120257524A1 (en) * 2011-04-11 2012-10-11 Qualcomm Incorporated Csi reporting for multiple carriers with different system configurations
WO2013043022A2 (en) * 2011-09-23 2013-03-28 엘지전자 주식회사 Method for transmitting control information and apparatus for same

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None
See also references of EP3101943A4 *

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