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WO2013005991A2 - Procédé et appareil de transmission d'informations de commande de liaison descendante dans un système de duplexage par répartition dans le temps - Google Patents

Procédé et appareil de transmission d'informations de commande de liaison descendante dans un système de duplexage par répartition dans le temps Download PDF

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Publication number
WO2013005991A2
WO2013005991A2 PCT/KR2012/005318 KR2012005318W WO2013005991A2 WO 2013005991 A2 WO2013005991 A2 WO 2013005991A2 KR 2012005318 W KR2012005318 W KR 2012005318W WO 2013005991 A2 WO2013005991 A2 WO 2013005991A2
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WIPO (PCT)
Prior art keywords
subframe
serving cell
phich
pusch
timing
Prior art date
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Ceased
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PCT/KR2012/005318
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English (en)
Korean (ko)
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WO2013005991A3 (fr
Inventor
김시형
권기범
박동현
박경민
윤성준
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Pantech Co Ltd
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Pantech Co Ltd
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Priority claimed from KR2020110011496A external-priority patent/KR20130005037A/ko
Priority claimed from KR1020110066627A external-priority patent/KR20130005192A/ko
Priority claimed from KR1020110080889A external-priority patent/KR20130018052A/ko
Application filed by Pantech Co Ltd filed Critical Pantech Co Ltd
Publication of WO2013005991A2 publication Critical patent/WO2013005991A2/fr
Publication of WO2013005991A3 publication Critical patent/WO2013005991A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H04J11/0053—Interference mitigation or co-ordination of intercell interference using co-ordinated multipoint transmission/reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting uplink control information in a TDD system of a wireless communication system.
  • the multi-carrier system is a wireless communication system capable of supporting carrier aggregation (CA).
  • CA carrier aggregation
  • carrier aggregation is a technique for efficiently using a fragmented small band, and combines a plurality of physically non-continuous bands in the frequency domain to produce the same effect as using a logically large band.
  • the component carrier for receiving downlink control information from the base station and the component carrier for receiving downlink data may be configured differently, or the link between the component carrier for receiving downlink control information and the component carrier for transmitting an uplink signal may be different. It is also possible to follow a link relationship different from the link established in the existing LTE. This scheduling method is called cross-carrier scheduling.
  • enhanced Inter Cell Interference Coordination (eICIC) technology is a method for mitigating interference between various cells in this HetNet situation.
  • the ABS Almost Blank Subframe
  • the Aggressor cell eg, macro cell or femto cell
  • the Victim cell eg pico cell or macro cell
  • An object of the present invention is to provide a method and chapter for performing UL HARQ in a TDD system.
  • Another technical problem of the present invention is to efficiently configure timing information for performing UL HARQ in a terminal and a base station to which cross-carrier scheduling is applied.
  • Another technical problem of the present invention is to provide a method and apparatus for configuring timing information for flexible traffic handling when ABS is used as an eICIC scheme in a TDD system.
  • Another technical problem of the present invention is to provide a method and apparatus for transmitting uplink data by controlling a transmission power of a terminal in a multi-component carrier system.
  • Another technical problem of the present invention is to provide an apparatus and method for applying independent up / down configuration for each serving cell.
  • a method for transmitting uplink control information by a terminal in a wireless communication system includes a physical downlink control channel (PDCCH) to which an uplink grant is mapped from a base station through a first serving cell; Receiving; Receiving a Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) from the base station through a second serving cell; And transmitting an uplink hybrid automatic repeat request (HARQ) based on the uplink grant to the base station through a physical uplink shared channel (PUSCH), wherein the TDD of the first serving cell is included.
  • PDCCH physical downlink control channel
  • PHICH Physical Hybrid Automatic Repeat Request Indicator Channel
  • HARQ uplink hybrid automatic repeat request
  • the PHICH reception timing is assigned to a downlink subframe of the first serving cell.
  • a corresponding position is defined, and the sum of the PHICH reception timing and the PUSCH transmission timing is determined to be the minimum value.
  • a physical downlink control channel (PDCCH) to which an uplink grant is mapped is transmitted to a terminal through a first serving cell.
  • PHICH physical hybrid automatic repeat request indicator channel
  • HARQ uplink hybrid automatic repeat request
  • the PHICH transmission timing is set to a downlink subframe of the first serving cell. Defined as the corresponding position, the sum of the PHICH transmission timing and the PUSCH transmission timing is determined to be the minimum value.
  • a terminal for transmitting uplink control information in a wireless communication system, the physical downlink control channel (PDCCH) to which an uplink grant is mapped from a base station through a first serving cell
  • PDCCH physical downlink control channel
  • a receiving unit for receiving a physical hybrid automatic repeat request indicator channel (PHICH) from the base station through a second serving cell
  • PHICH physical hybrid automatic repeat request indicator channel
  • HARQ uplink hybrid automatic repeat request
  • PUSCH physical uplink shared channel
  • the PHICH reception timing is assigned to a downlink subframe of the first serving cell.
  • a corresponding position is defined, and the sum of the PHICH reception timing and the PUSCH transmission timing is determined to be the minimum value.
  • UL HARQ when different TDD settings are applied to a plurality of serving cells, UL HARQ may be efficiently configured by performing UL HARQ timing.
  • uplink transmission may be performed by effectively operating a PUSCH resource and flexibly configuring an ABS pattern.
  • UL PUSCH timing and UL HARQ timing can be effectively configured.
  • the timing of receiving the transmission power control command for the secondary serving cell can be matched with the timing of the transmission power control command for the main serving cell.
  • the timing according to the request of the channel status information with respect to the secondary serving cell can be matched with the timing of reporting the channel status information.
  • uplink / downlink setting for each serving cell is not the same in the multi-component carrier system, an ambiguity of the reception timing of the transmission power control command, or an ambiguity of the channel status information reporting timing.
  • FIG. 1 shows a wireless communication system to which the present invention is applied.
  • FIG. 2 shows an example of a protocol structure for supporting a multi-carrier system to which the present invention is applied.
  • 3 shows a TDD radio frame structure in a 3GPP LTE system.
  • FIG. 4 is an exemplary diagram illustrating a resource grid for one slot.
  • 5 shows a structure of a downlink subframe.
  • FIG. 6 shows a structure of an uplink subframe.
  • FIG. 9 is a flowchart illustrating an optimized PUSCH scheduling method (or UL HARQ timing configuration method) according to the present invention.
  • FIG. 10 illustrates an example of applying a configuration method of PUSCH timing or PHICH timing according to the present invention.
  • FIG. 11 is a flowchart illustrating another PUSCH timing configuration method or a UL HARQ timing configuration method according to the present invention.
  • FIG 13 illustrates subframe scheduling according to the present invention.
  • FIG. 14 is a flowchart illustrating another example of a method of configuring HARQ timing according to the present invention.
  • 16 is a flowchart illustrating an example of a method of configuring UL HARQ timing according to the present invention.
  • 17 is a flowchart illustrating another example of a method of configuring UL HARQ timing according to the present invention.
  • FIG. 18 is a diagram illustrating a k value configured by the UL HARQ timing configuration method of the present invention.
  • FIG. 19 illustrates k PHICH configured by the UL HARQ timing configuration method of the present invention.
  • 20 is a diagram illustrating a value of l according to a newly configured UL HARQ timing when subframe bundling is configured according to the present invention.
  • FIG. 21 illustrates configuring PHICH timing using multiplexing according to the present invention.
  • FIG. 22 shows a result of resource allocation performed using ACK / NACK multiplexing according to the present invention.
  • 23 is a flowchart illustrating controlling uplink transmission power according to the present invention.
  • FIG. 24 is a flowchart illustrating an example of a method of determining a TPC command reception timing (KPUSCH) according to the present invention.
  • 25 illustrates a method of determining a new TPC command reception timing value in accordance with the present invention.
  • 26 illustrates a process of determining a new TPC command reception timing according to the present invention.
  • FIG. 27 is a flowchart illustrating another example of a method of determining a TPC command reception timing according to the present invention.
  • FIG. 28 shows an example of allocating a common search space for transmitting an RAR grant to which a following serving cell is applied.
  • 29 is a flowchart illustrating aperiodic CSI reporting timing in accordance with the present invention.
  • FIG. 30 is a block diagram illustrating a base station and a terminal for transmitting control information according to an embodiment of the present invention.
  • FIG. 1 shows a wireless communication system to which the present invention is applied.
  • the wireless communication system 10 is widely deployed to provide various communication services such as voice and packet data.
  • the wireless communication system 10 includes at least one base station 11 (evolved NodeB, eNB).
  • Each base station 11 provides a communication service for specific cells 15a, 15b, and 15c.
  • the cell can in turn be divided into a number of regions (called sectors).
  • a UE 12 may be fixed or mobile and may have a mobile station (MS), a mobile terminal (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, or a PDA. (personal digital assistant), wireless modem (wireless modem), a handheld device (handheld device) may be called other terms.
  • the base station 11 may be called by other terms such as a base station (BS), a base transceiver system (BTS), an access point, an femto base station, a home node B, a relay, and the like.
  • the cell should be interpreted in a comprehensive sense of a part of the area covered by the base station 11 and encompasses various coverage areas such as megacells, macrocells, microcells, picocells and femtocells.
  • downlink means communication from the base station 11 to the terminal 12, and uplink means communication from the terminal 12 to the base station 11.
  • the transmitter may be part of the base station 11 and the receiver may be part of the terminal 12.
  • the transmitter may be part of the terminal 12 and the receiver may be part of the base station 11.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-FDMA
  • OFDM-FDMA OFDM-FDMA
  • OFDM-TDMA OFDM-TDMA
  • various multiple access schemes such as OFDM-CDMA may be used.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • Carrier aggregation supports a plurality of carriers, also referred to as spectrum aggregation or bandwidth aggregation.
  • Individual unit carriers bound by carrier aggregation are called component carriers (CCs).
  • Each component carrier is defined by a bandwidth and a center frequency.
  • Carrier aggregation supports increased throughput, prevents cost increases due to the introduction of wideband radio frequency (RF) devices, and ensures compatibility with existing systems. For example, if five component carriers are allocated as granularity in a carrier unit having a 20 MHz bandwidth, a bandwidth of up to 100 MHz may be supported.
  • RF radio frequency
  • Carrier aggregation may be divided into contiguous carrier aggregation between continuous component carriers in the frequency domain and non-contiguous carrier aggregation between discontinuous component carriers.
  • the number of carriers aggregated between the downlink and the uplink may be set differently. The case where the number of downlink component carriers and the number of uplink component carriers are the same is called symmetric aggregation, and when the number is different, it is called asymmetric aggregation.
  • the size (ie, bandwidth) of component carriers may be different from each other. For example, assuming that 5 component carriers are used for the configuration of the 70 MHz band, a 5 MHz component carrier (carrier # 0) + 20 MHz component carrier (carrier # 1) + 20 MHz component carrier (carrier # 2) + 20 MHz component carrier (carrier # 3) + 5MHz component carrier (carrier # 4) may be configured.
  • a multiple carrier system refers to a system supporting carrier aggregation.
  • Adjacent carrier aggregation and / or non-adjacent carrier aggregation may be used in a multi-carrier system, and either symmetric aggregation or asymmetric aggregation may be used.
  • FIG. 2 shows an example of a protocol structure for supporting a multi-carrier system to which the present invention is applied.
  • the common medium access control (MAC) entity 210 manages a physical layer 220 using a plurality of carriers.
  • the MAC management message transmitted on a specific carrier may be applied to other carriers. That is, the MAC management message is a message capable of controlling other carriers including the specific carrier.
  • the physical layer 220 may operate in a time division duplex (TDD) and / or a frequency division duplex (FDD).
  • TDD time division duplex
  • FDD frequency division duplex
  • the physical downlink control channel informs the terminal of resource allocation of a paging channel (PCH) and downlink shared channel (DL-SCH) and hybrid automatic repeat request (HARQ) information related to the DL-SCH.
  • the PDCCH may carry an uplink grant informing the UE of resource allocation of uplink transmission.
  • the physical control format indicator channel informs the UE of the number of OFDM symbols used for PDCCHs and is transmitted every subframe.
  • PHICH physical Hybrid ARQ Indicator Channel
  • PHICH physical Hybrid ARQ Indicator Channel
  • Physical uplink control channel (PUCCH) carries uplink control information such as HARQ ACK / NAK, scheduling request, and CQI for downlink transmission.
  • Physical uplink shared channel (PUSCH) carries an uplink shared channel (UL-SCH).
  • a physical random access channel (PRACH) carries a random access preamble.
  • FIG. 3 illustrates a TDD radio frame structure in a 3GPP LTE system.
  • one radio frame is composed of two half-frames having a length of 10 ms and a length of 5 ms.
  • one half frame consists of five subframes having a length of 1 ms.
  • One subframe is designated as one of an uplink subframe (UL subframe), a downlink subframe (DL subframe), and a special subframe.
  • One TDD radio frame includes at least one uplink subframe, at least one downlink subframe, and at least one special subframe.
  • One subframe consists of two slots.
  • one subframe may have a length of 1 ms, and one slot may have a length of 0.5 ms.
  • the time taken for one subframe to be transmitted is called a transmission time interval (TTI).
  • One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain and a plurality of subcarriers in the frequency domain.
  • the OFDM symbol is used to represent one symbol period since 3GPP LTE uses OFDMA in downlink, and may be referred to as an SC-FDMA symbol or a symbol period according to a multiple access scheme.
  • the RB includes a plurality of OFDM symbols and a plurality of subcarriers in one slot in resource allocation units.
  • the structure of the radio frame is only an example, and the number of subframes included in the radio frame or the number of slots included in the subframe and the number of OFDM symbols included in the slot may be variously changed.
  • the special subframe is a specific period for separating the uplink and the downlink between the uplink subframe and the downlink subframe.
  • At least one special subframe exists in one radio frame, and the special subframe includes a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS).
  • DwPTS is used for initial cell search, synchronization or channel estimation.
  • UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal.
  • the GP is a protection interval for removing interference caused by the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
  • the special subframe may be used as a downlink subframe.
  • FIG. 4 is an exemplary diagram illustrating a resource grid for one slot.
  • one downlink slot includes a plurality of OFDM symbols in a time domain.
  • one downlink slot includes 7 OFDM symbols and one resource block includes 12 subcarriers in a frequency domain, but is not limited thereto.
  • Each element on the resource grid is called a resource element, and one resource block includes 12 ⁇ 7 resource elements.
  • the number N RB of resource blocks included in the downlink slot depends on a downlink transmission bandwidth set in a cell.
  • 5 shows a structure of a downlink subframe.
  • a subframe includes two slots. Up to three OFDM symbols of the first slot in the subframe may be a control region to which control channels are allocated, and the remaining OFDM symbols may be a data region to which a Physical Downlink Shared Channel (PDSCH) is allocated.
  • PDSCH Physical Downlink Shared Channel
  • Downlink control channels include a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), a Physical Hybrid-ARQ Indicator Channel (PHICH), and the like.
  • PCFICH Physical Control Format Indicator Channel
  • PDCH Physical Downlink Control Channel
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • the PDCCH includes resource allocation of downlink-shared channel (DL-SCH) (also referred to as downlink grant) and transmission format, resource allocation information of uplink shared channel (UL-SCH) (also referred to as uplink grant).
  • DL-SCH downlink-shared channel
  • UL-SCH uplink shared channel
  • Resource allocation of upper layer control messages such as paging information on PCH, system information on DL-SCH, random access response transmitted on PDSCH, a set of transmit power control commands for individual UEs in any UE group, and Voice over Internet Protocol (VoIP) can be activated.
  • Control information transmitted through the PDCCH as described above is called downlink control information (DCI).
  • DCI indicates uplink resource allocation information, downlink resource allocation information, and uplink transmission power control command for arbitrary UE groups.
  • the PHICH carries an ACK (Acknowledgement) / NACK (Not-Acknowledgement) signal for an uplink HARQ (Hybrid Automatic Repeat Request). That is, the ACK / NACK signal for the uplink data transmitted by the terminal is transmitted on the PHICH.
  • ACK Acknowledgement
  • NACK Not-Acknowledgement
  • the downlink subframe may be set to an undetected subframe in which the UE does not attempt to detect data (eg, does not detect the reference signal and does not perform the reference signal measurement).
  • the undetected subframe may be, for example, a multicast / broadcast single frequency network (MBSFN) subframe.
  • MMSFN broadcast single frequency network
  • MBSFN subframe can be used for two purposes.
  • the first use is for multimedia broadcast multicast service (MBMS).
  • MBMS is a service that transmits the same signal in multiple cells of a wireless communication system at the same time. Since the signal for MBMS is transmitted in multiple cells at the same time, unicast and reference signals are transmitted in different cells. Should be inserted differently. To this end, the base station informs the terminal of the location of the subframe in which the MBMS signal is transmitted, and a reference signal insertion scheme different from unicast is used in the subframe.
  • the second use is to avoid unnecessary signal reception and reference signal measurement to the terminal to which the base station or relay station is connected.
  • the RS sets the subframe receiving the downlink data from the base station as the MBSFN subframe and informs the UE.
  • the UE (more specifically, the 3GPP LTE release-8 UE) does not detect the reference signal in the MBSFN subframe and does not perform the reference signal measurement.
  • the MBSFN subframe may be used for a second purpose.
  • a plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
  • the PDCCH is transmitted on an aggregation of one or several consecutive control channel elements (CCEs).
  • CCE is a logical allocation unit used to provide a PDCCH with a coding rate according to a state of a radio channel.
  • the CCE corresponds to a plurality of resource element groups.
  • the format of the PDCCH and the number of bits of the PDCCH are determined according to the correlation between the number of CCEs and the coding rate provided by the CCEs.
  • DCI Downlink control information
  • Table 1 DCI format Explanation 0 Used for scheduling of PUSCH (Uplink Grant) One Used for scheduling one PDSCH codeword in one cell 1A Used for simple scheduling of one PDSCH codeword in one cell and random access procedure initiated by PDCCH command 1B Used for simple scheduling of one PDSCH codeword in one cell using precoding information 1C Used for brief scheduling of one PDSCH codeword and notification of MCCH change 1D Used for simple scheduling of one PDSCH codeword in one cell containing precoding and power offset information 2 Used for PDSCH scheduling for UE configured in spatial multiplexing mode 2A Used for PDSCH scheduling of UE configured in long delay CDD mode 2C Used in transmission mode 9 (multi-layer transmission) 2D Used in linked multicasting scheme 3 Used to transmit TPC commands for PUCCH and PUSCH with power adjustment of 2 bits 3A Used to transmit TPC commands for PUCCH and PUSCH with single bit power adjustment 4 Used for PUSCH scheduling in one uplink cell using a multi-antenna port transmission mode
  • DCI format 0 indicates uplink resource allocation information
  • DCI format 1 for scheduling one PDSCH codeword indicates uplink resource allocation information
  • DCI format 1A for compact scheduling of one PDSCH codeword
  • DL- DCI format 1C for very simple scheduling of SCH
  • DCI format for PDSCH scheduling in closed-loop spatial multiplexing mode DCI format for PDSCH scheduling in open-loop spatial multiplexing mode
  • TPC Transmission Power Control
  • Each field of the DCI is sequentially mapped to n information bits a 0 to a n-1 . For example, if DCI is mapped to information bits of a total of 44 bits in length, each DCI field is sequentially mapped to a 0 to a n-1 .
  • DCI formats 0, 1A, 3, and 3A may all have the same payload size.
  • DCI format 0 may be called an uplink grant.
  • Table 2 below shows information elements included in DCI format 0, which is uplink resource allocation information (or uplink grant).
  • Table 3 shows a structure of a radio frame that can be set according to an arrangement of an uplink subframe and a downlink subframe in a 3GPP LTE TDD system, also called TDD configuration.
  • D represents a downlink subframe
  • U represents an uplink subframe
  • S represents a special subframe.
  • the point of time from the downlink to the uplink or the time from the uplink to the downlink is called a switching point.
  • the switch-point periodicity means a period in which an uplink subframe and a downlink subframe are repeatedly switched in the same manner, and are 5 ms or 10 ms.
  • D-> S-> U-> U-> U is switched from 0th to 4th subframe, and 5th to 9th.
  • the subframe is switched to D-> S-> U-> U-> U as before. Since one subframe is 1ms, the periodicity at the switching time is 5ms. That is, the periodicity of the switching time is less than one radio frame length (10ms), and the switching mode in the radio frame is repeated once.
  • the base station or relay station may set the downlink subframe to the MBFSN subframe and then transmit and receive data.
  • a wireless communication system is a 3GPP LTE system, i) subframes 0, 1, 5, 6, ii when operating in TDD mode subframes 0, 4, 5, 9 when operating in FDD mode MBSFN It cannot be set as a subframe. This is because it is a subframe that transmits a main control signal such as a synchronization signal (eg, primary synchronization signal and secondary synchronization signal) to the terminal.
  • a main control signal such as a synchronization signal (eg, primary synchronization signal and secondary synchronization signal)
  • FIG. 6 shows a structure of an uplink subframe.
  • an uplink subframe may be divided into a control region and a data region in the frequency domain.
  • the control region is allocated a Physical Uplink Control Channel (PUCCH) for transmitting uplink control information.
  • the data region is allocated a physical uplink shared channel (PUSCH) for transmitting data.
  • PUCCH Physical Uplink Control Channel
  • PUSCH physical uplink shared channel
  • PUCCH for one UE is allocated to an RB pair in a subframe.
  • Resource blocks belonging to a resource block pair occupy different subcarriers in each of the first slot and the second slot.
  • the frequency occupied by the resource block belonging to the resource block pair allocated to the PUCCH is changed based on a slot boundary. This is called that the RB pair allocated to the PUCCH is frequency-hopped at the slot boundary.
  • the terminal may obtain a frequency diversity gain by transmitting uplink control information through different subcarriers over time.
  • m is a location index indicating a logical frequency domain location of a resource block pair allocated to a PUCCH in a subframe.
  • the uplink control information transmitted on the PUCCH includes a hybrid automatic repeat request (HARQ) acknowledgment (ACK) / non-acknowledgement (NACK), a channel quality indicator (CQI) indicating a downlink channel state, and an SR that is an uplink radio resource allocation request.
  • HARQ hybrid automatic repeat request
  • ACK acknowledgment
  • NACK non-acknowledgement
  • CQI channel quality indicator
  • SR scheduling request
  • the uplink data transmitted on the PUSCH may be a transport block which is a data block for the UL-SCH transmitted during the TTI.
  • the transport block may be user information.
  • the uplink data may be multiplexed data.
  • the multiplexed data may be a multiplexed transport block and control information for the UL-SCH.
  • control information multiplexed with data may include CQI, PMI (Precoding Matrix Indicator), HARQ, RI (Rank Indicator), and the like.
  • the uplink data may consist of control information only.
  • cross-carrier scheduling is a resource allocation of a PDSCH transmitted through another component carrier through a PDCCH transmitted through a specific component carrier or another component other than the component carrier basically linked with the specific component carrier.
  • a scheduling method for resource allocation of a PUSCH transmitted through a carrier That is, the PDCCH and the PDSCH may be transmitted on different DL CCs, and the PUSCH may be transmitted on another UL CC other than the UL CC linked to the DL CC on which the PDCCH including the UL grant is transmitted.
  • the UE can receive scheduling information (UL grant, etc.) only through a specific serving cell (or CC).
  • a serving cell (or CC) for cross-carrier scheduling is called an ordering serving cell (or CC)
  • another serving cell (or CC) scheduled by the ordering serving cell (or CC) is following. It is called a serving cell (or CC).
  • the ordering serving cell may be referred to as a scheduling cell, and the following serving cell refers to a cell that receives information on a scheduling cell through an RRC signal.
  • the ordering serving cell and the following serving cell used below may mean an ordering CC and a following CC, respectively.
  • a carrier indicator indicating a DL CC / UL CC through which a PDSCH / PUSCH for which PDCCH provides control information is transmitted is required.
  • a field including such a carrier indicator is hereinafter called a carrier indication field (CIF).
  • the aforementioned cross carrier scheduling can be classified into downlink cross-carrier scheduling and uplink cross-carrier scheduling.
  • Downlink cross-carrier scheduling means a case in which a component carrier on which a PDCCH including resource allocation information and other information for PDSCH transmission is transmitted is different from a component carrier on which a PDSCH is transmitted.
  • Uplink cross-carrier scheduling means a case in which a component carrier on which a PDCCH including a UL grant for PUSCH transmission is transmitted is different from a DL component carrier linked to a UL component carrier on which a PUSCH is transmitted.
  • the PUSCH timing transmitted by the primary serving cell and the PUSCH timing transmitted by the secondary serving cell are the same.
  • independent TDD configuration is applied to each serving cell and cross-carrier scheduling is applied, if the existing PUSCH timing is used, resources may be wasted and the system may operate unstable. Therefore, a specific scheme for UL HARQ timing is required.
  • the UL HARQ timing includes timing of transmitting PHICH as well as timing of transmitting PUSCH.
  • the main serving cell and the secondary serving cell may exist in different frequency bands (Inter-band) or may exist in the same frequency band (Intra-band).
  • Table 4 below relates to the exponent k value indicating the PUSCH timing considered in the current TDD.
  • k is an offset of a subframe in which the UE transmits the PUSCH corresponding to the PDCCH after DL subframe n in which the UE receives the PDCCH. That is, the PUSCH is transmitted after k subframes.
  • the TDD UL / DL configuration is "0"
  • the UE receives the PDCCH in subframe # 1 the UE transmits the PUSCH corresponding to the PDCCH in subframe # 4.
  • the TDD UL / DL configuration is hereinafter referred to as TDD configuration.
  • Table 5 below relates to an index k PHICH indicating the PHICH timing considered in the current TDD.
  • k PHICH means transmitting the PHICH in subframe # n + k PHICH after subframe #n which is a UL subframe.
  • subframe # 2 transmits a PHICH in subframe # 6.
  • the UL HARQ when the base station transmits the UL grant, which is PUSCH scheduling information to the terminal through the PDCCH, the terminal transmits PUSCH data at a predetermined timing and the ACK / NACK for this uplink grant and / or
  • the process of transmitting through the PHICH is a process of repeating for a predetermined period until receiving the ACK signal from the base station.
  • a UL HARQ process may be performed.
  • RAR random access response
  • UL HARQ is referred to as synchronous UL HARQ transmitted at a predetermined timing.
  • the base station transmits ACK / NACK to the terminal through the PHICH, only the ACK / NACK is transmitted except for the UL grant.
  • the following serving cells are scheduled to transmit ACK / NACK information (ie, transmit PHICH) except for the UL grant (ie, do not transmit the PDCCH).
  • the adaptive UL HARQ also transmits UL grant information (resource allocation related information, etc.) through the PDCCH at PHICH timing.
  • UL grant information resource allocation related information, etc.
  • the base station transmits the PHICH to the terminal through the following serving cell, and at the same timing, the base station transmits the PDCCH to the terminal through the ordering serving cell.
  • a method of transmitting data by configuring synchronous UL HARQ timing of the following serving cell will be described.
  • PUSCH scheduling for a following serving cell in an ordering serving cell using cross-carrier scheduling The present invention relates to a method for configuring an appropriate UL HARQ timing when a TDD configuration of an ordering serving cell and a following serving cell is different.
  • the terminal When the PHICH for the following serving cell can be transmitted through the ordering serving cell, the terminal receives both the UL grant and the PHICH from the base station through the ordering serving cell. However, if the PHICH timing of the following serving cell transmitted from the ordering serving cell is the same as the DL transmission timing of the following serving cell, the PHICH may be transmitted through the following serving cell at this timing.
  • the PUSCH transmission timing and the PHICH transmission timing depend on the transmission timing of the following serving cell. For example, if the ordering serving cell is TDD configuration 1 and the following serving cell is TDD configuration 0, referring to Table 3 above, if the ordering serving cell is TDD configuration 1, the DL subframe is subframe # 0, the subframe. When subframe # 4, subframe # 4, subframe # 5, subframe # 6, subframe # 9, and the following serving cell is TDD configuration 0, the DL subframe is subframe # 0, subframe # 1, subframe # 5, subframe # 6. Accordingly, the PUSCH transmission timing and the PHICH transmission timing are configured with at least one of subframe # 0, subframe # 1, subframe # 5, and subframe # 6 which are DL transmission timings of the following serving cell.
  • the present invention describes a method of configuring the optimized PUSCH timing and PHICH timing for the case where the DL timing of the ordering serving cell does not include the DL timing of the following serving cell.
  • PUSCH scheduling method (or UL HARQ timing configuration method) for each TDD configuration
  • a PUSCH time table (UL HARQ time table) may be configured and used.
  • the PUSCH time table may be configured by the base station and transmitted to the terminal, and then the terminal may transmit the PUSCH based on the PUSCH time table, and the terminal itself may configure the PUSCH time table and transmit the PUSCH based on this.
  • the base station may configure the HARQ time table and transmit HARQ to the terminal based on the base station.
  • the base station may transmit the HARQ based on the HARQ time table. Therefore, the subject of the PUSCH configuration method or HARQ configuration method described below may be a terminal or a base station.
  • transmitting the HARQ and transmitting the PHICH have the same meaning.
  • the PHICH is expressed as transmitting the PHICH.
  • scheduling information such as a UL grant and a position (k PHICH value) of transmitting a PHICH are defined as positions of DL subframes of an ordering serving cell.
  • the location of the DL subframe of the following serving cell (except for the DL subframe transmitting PDCCH) and the UL subframe is defined based on the TDD configuration information of the following serving cell (S905). That is, the DL subframe and the UL subframe can be scheduled for the following serving cell at the same timing.
  • the PHICH may be transmitted in the following serving cell when the base serving cell also has the DL subframe timing at the timing of the DL subframe in which the base station transmits the PHICH to the terminal. It can be applied when the load of the PHICH of the ordering serving cell is full.
  • the DL subframe (k value) corresponding to the PUSCH timing is configured to always transmit the UL grant (S910).
  • the PHICH timing is configured to be at least 4 ms after receiving the PUSCH data
  • the PUSCH timing is configured to be at least 4 ms after receiving the UL grant (S920). That is, in Table 4, the k PHICH value (PHICH timing) is configured to be always greater than or equal to 4, and in Table 3, the k value (PUSCH timing) is configured to be always greater than or equal to 4.
  • All UL subframes are configured to transmit UL grants or PHICHs one-to-one to other DL subframes (S930).
  • k and k PHICHs are configured to be minimum values (S940).
  • k and k PHICH is configured so that HARQ RTT (Round Trip Time) has a value between a minimum of 10ms and a maximum of 16ms (S945), and the sum of all k values and all k PHICH values is configured to be a minimum value (S946). .
  • min sum [total (k + k PHICH )]
  • the k or k PHICH values may be equal to or less than 7, respectively. It is configured to be a value (S947).
  • k and k PHICH values for two UL subframes are configured to have 6 and 8, or k and k PHICH values are configured to have 7 and 7, respectively, k is possible. Value and k PHICH value consist of 7 and 7, respectively.
  • the k value is configured to have a value smaller than the k PHICH value if possible (S948). For example, if a k value and a k PHICH value are configured to have 4 and 6, and a k value and k PHICH value are configured to have 6 and 4, respectively, the k and k PHICH values may be 4 and 6, respectively.
  • the UL grant or PHICH is transmitted or the UL grant and PHICH (ACK / NACK) are transmitted. It may be configured to transmit at the same time (S950). However, step S950 is not an essential component.
  • PHICH timing for successive UL subframes is configured sequentially (S960).
  • FIG. 10 illustrates an example of applying a configuration method of PUSCH timing or PHICH timing according to the present invention.
  • the PUSCH timing configuration method according to the present invention is applied when the ordering serving cell is TDD configuration 3 and the following serving cell is TDD configuration 1.
  • the base station can transmit UL grant information through subframes of the ordering serving cell corresponding to 4 ms before for each UL subframe of the following serving cell.
  • the UL grant may be transmitted in subframe # 8 and subframe # 9 of the ordering serving cell, which is exactly 4 ms before, for subframe # 2 and subframe # 3 among the UL subframes of the following serving cell.
  • subframe # 3 and subframe # 4 which are exactly 4 ms before for subframe # 7 and subframe # 8 of the following serving cell, are UL subframes in the ordering serving cell.
  • UL grants transmitted in DL subframes are not included.
  • the optimal k value is configured such that the k value for each UL subframe of the following serving cell is greater than four.
  • the DL subframe of the nearest ordering serving cell is found to form an optimal k value.
  • the DL subframe of the ordering serving cell capable of transmitting the UL grant is composed of subframe # 0, subframe # 1, subframe # 8, and subframe # 9.
  • the k PHICH value is determined after the k value is determined. It may be configured by applying the steps S910 to S930 of FIG.
  • step S910 since the UL grant should always be transmitted at the PHICH timing, the DL subframe of the ordering serving cell capable of transmitting the PHICH is one of subframe # 0, subframe # 1, subframe # 8, and subframe # 9. Accordingly, the PHICH may be transmitted after 12 ms with respect to UL subframe # 8 of the following serving cell.
  • k or k PHICH value is preferably configured to have a different value of k and k PHICH value if possible, can not be configured such that a value of seven or less, respectively. Therefore, if a subframe of 7 ms or less is found with respect to subframe # 8 of the following serving cell, subframe # 5 is configured instead of subframe # 8 of the ordering serving cell.
  • the modified k and the modified k PHICH may be configured as shown in FIG. 10. According to the modified k and the modified k PHICH , all the steps of FIG. 9 are satisfied.
  • Another PUSCH timing configuration method (or UL HARQ timing configuration method) may be applied.
  • 11 is a flowchart illustrating another PUSCH timing configuration method or a UL HARQ timing configuration method according to the present invention.
  • 11A and 11B are structures in which “A” is connected to FIGS. 11A and 11B in a portion indicated by “A”, and step S1140 of FIG. 11B is performed after step S1130 of FIG. 11A.
  • S1100 to S1120 are performed similarly to steps S900 to S920 of FIG. 9.
  • scheduling information such as an UL grant and a location of a subframe transmitting PHICH are defined as a location of a DL subframe of an ordering serving cell (S1100).
  • the location of the DL subframe of the following serving cell (except for the DL subframe transmitting PDCCH) and the UL subframe is defined based on the TDD configuration information of the following serving cell (S1105).
  • the PHICH may be transmitted in the following serving cell. It can be applied when the load of the PHICH of the ordering serving cell is full.
  • the DL subframe corresponding to the PHICH timing is configured to always transmit the UL grant (S1110).
  • the PHICH timing should be at least 4 ms after receiving the PUSCH data, and the PUSCH timing should be transmitted at least 4 ms after receiving the UL grant (S1120). That is, in Table 4, the k PHICH value is always configured to be greater than or equal to 4, and in Table 3, the k value is configured to be always greater than or equal to 4.
  • a k value and a k PHICH value are configured to have a minimum value (S1130).
  • the base station performs PUSCH scheduling using the UL index when transmitting scheduling information for the following serving cell through the ordering serving cell (S1145).
  • PUSCH scheduling may be performed using a new UL index. In this case, a method of scheduling the PUSCH using the "new UL index" will be described below.
  • the ordering serving cell is TDD configuration 0 and the following serving cell is TDD configuration). 3 or TDD setting 4
  • k values and k PHICH values are configured according to steps S946 to S960 in FIG. 9.
  • the sum of all k values and all k PHICH values is configured to be the minimum value (S1151). That is, min (sum [total (k + k PHICH )]) is calculated.
  • min sum [total (k + k PHICH )]
  • the k or k PHICH value is configured to be 7 or less if possible.
  • the k value is configured to have a value smaller than the k PHICH value as much as possible (S1153).
  • the base station When the base station transmits scheduling information for the following serving cell or ACK / NACK information through each DL subframe within the ordering serving cell, the base station transmits a UL grant or PHICH or simultaneously transmits the UL grant and PHICH with the ACK / NACK. It may be configured to transmit (S1154). PHICH timing for successive UL subframes is configured sequentially (S1155).
  • the excluded one UL subframe may be excluded from the most suitable specific one UL subframe by comparing the configuration according to steps S940 to S948 of FIG. 9. Specifically, when the UL subframe does not satisfy the steps S940 to S948 or the UL subframe that satisfies the steps S940 to S948 but excludes one UL subframe, the sum of all k values and all k PHICH values is the minimum value in step S946. The one UL subframe may be excluded.
  • the ordering serving cell is TDD configuration 0 and the following serving cell is TDD configuration 4.
  • UL subframe # 3 of the following serving cell cannot be PUSCH scheduled. This is because the new UL index can be used only when there are two or more DL subframes capable of transmitting UL grants.
  • the k PHICH value which is the PHICH timing for the UL subframe that cannot perform PUSCH scheduling using the k value, is always configured to 7 (S1180).
  • the UL index is transmitted on the PDCCH and may be configured with 2 bits in DCI format 0/4 capable of transmitting UL grant information.
  • a method of PUSCH scheduling using a general UL index will be described.
  • the UL index is used only in TDD setting 0.
  • a PUSCH scheduling method using a new UL index is an invention that applies a PUSCH scheduling method using a general UL index.
  • I PHICH simultaneously when using the UL index.
  • I PHICH is 1 when the PUSCH is transmitted in subframe # 4 or subframe # 9 for TDD configuration 0, and has a value of 0 otherwise.
  • the MSB (Most Significant Bit) of the UL index is 1 or the I PHICH value is 0, when the subframe in which the PHICH is transmitted is subframe # 0 or subframe # 5, the PUSCH timing is subframe #n (ACK / NACK or Subframe receiving the UL grant) + k.
  • the PUSCH timing is subframe # 4 (condition 1).
  • the I PHICH value is 0 and the subframe in which the PHICH is transmitted is subframe # 5 (condition 2).
  • the subframe in which the PHICH is transmitted is If the frame # 0 or the subframe # 5 or the subframe where the PHICH is transmitted is the subframe # 1 or the subframe # 6, the PUSCH timing is subframe #n (DL subframe with ACK / NACK or UL grant) + 7.
  • the PUSCH timing is subframe # 7 (condition 3), and the subframe in which the PHICH is transmitted is In the case of subframe # 1, the PUSCH timing is subframe # 8 (condition 4).
  • the subframe in which the PUSCH is transmitted is subframe # 9 (condition 5), and the subframe in which the PHICH is transmitted is the subframe # 6. In this case, the PUSCH timing is subframe # 3 (condition 6).
  • the PUSCH timing is subframe # n + k and subframe # n + 7 (condition 7).
  • PUSCH timing may be configured by using the condition 1 to condition 7 and the UL index 2 bits (MSB and LSB).
  • a method of scheduling a PUSCH using a new UL index is a combination of conditions 1 to 7 of a method of scheduling a PUSCH using a general UL index and some of conditions for scheduling a PUSCH using MSBs and LSBs of a general UL index.
  • subframe # 2 If the PUSCH scheduling for subframe # 2, subframe # 3, subframe # 4, subframe # 7, subframe # 8, and subframe # 9 that can be used as the UL subframe in the TDD configuration is not possible, a new UL index Some of the above conditions 1 to 7 are applied to schedule the PUSCH using.
  • condition 3 and condition when I PHICH is 1 (when the subframe receiving the PUSCH is # 4 or # 9) among the conditions 1 to 7 If 5) is applicable, apply those conditions to use the new UL index. In this case, if condition 3 can be applied, condition 1 is also applied, and if condition 5 is applicable, condition 2 is also applied.
  • condition 1 as well as condition 1 apply to a method of scheduling a PUSCH using a new UL index.
  • I PHICH may be newly defined in the new UL index.
  • the meaning of I PHICH may be newly defined using only a condition used in a method of scheduling a PUSCH using a new UL index. For example, when the PUSCH scheduling is performed using the new UL index, the PUSCH timing is subframe # when the subframe where the PUSCH is transmitted is subframe # 4 and the subframe where the PHICH is transmitted is subframe # 0.
  • condition 3 If it can be set to 7 (condition 3), and at the same time, and only applies a condition (condition 1) that allows PUSCH timing to subframe # 4 when the subframe in which the PHICH is transmitted is subframe # 0, I PHICH corresponds to In the TDD configuration corresponding to the TDD configuration of the following serving cell, the PUSCH transmission timing is 1 when the subframe # 4 is defined and 0 otherwise.
  • the condition is unconditional to the method of scheduling the PUSCH using the new UL index.
  • the MSB is 1
  • the PUSCH timing is subframe #n (the subframe receiving the ACK / NACK or UL grant) + k
  • the LSB is 1, the PUSCH timing is subframe # n + 7. The condition is always applied.
  • condition 7 when both MSB and LSB are 1 is applied only when the number of UL subframes of the following serving cell is larger than the number of DL subframes of the ordering serving cell.
  • condition 7 is applied by a method of PUSCH scheduling using a new UL index.
  • the ordering serving cell is TDD configuration 0, the following serving cell is TDD configuration 3, and the TDD HARQ RTT cannot be set from 10 ms to 16 ms. 11, the number of UL subframes of the following serving cell is not greater than the number of DL subframes of the ordering serving cell in step S1140 of FIG. 11.
  • HARQ RTT can be configured up to 20
  • subframe # 2 and subframe # 3 which are UL subframes of the following serving cell
  • the subframe corresponding to the timing before 4ms is not the D subframe in the ordering serving cell, so the value k is made larger.
  • the first k value of 12 is shown.
  • the k PHICH value is determined.
  • the optimal value of the k PHICH value configured to transmit the UL grant in the DL subframe corresponding to the PHICH timing is shown in the first k PHICH value in FIG. 12. It can be seen that the HARQ RTT is 18 at most.
  • HARQ RTT is possible only up to 16, as described above with reference to FIG. 11, after excluding one UL subframe, a new k-th value and a new k-th PHICH value should be configured, and the PUSCH is scheduled using the new UL index. do.
  • the specific one UL subframe most appropriate may be excluded by comparing the configuration according to steps S940 to S948 of FIG. 9. Specifically, when the UL subframe does not satisfy the steps S940 to S948 or the UL subframe that satisfies the steps S940 to S948 but excludes one UL subframe, the sum of all k values and all k PHICH values is the minimum value in step S946. The one UL subframe may be excluded.
  • k such that the sum of k values and k PHICH value is minimized and, k value such that the minimum total sum of k PHICH, and k and k PHICH is configured such that each of 7 or less, and k is configured to be smaller than k PHICH k value and k value were PHICH is equal to the value 2 k and 2 k the value of PHICH 12, wherein the UL sub-frame to be excluded is determined as the sub-frame # 3.
  • the UL index may be used to schedule the UL subframe # 3.
  • the meaning of the UL index can be used as follows.
  • the PUSCH timing is subframe # n + k.
  • the PUSCH timing is subframe # n + 7.
  • the k PHICH value which is the PHICH timing for UL subframe # 3 that cannot be scheduled using only the k value, is set to 7.
  • the k value and the k PHICH value when HARQ RTT is possible up to 16 may be configured with the third k value and the third k PHICH value of FIG. 12.
  • FIG. 13 illustrates subframe scheduling according to the present invention. Specifically, it indicates a PUSCH scheduled subframe and a subframe that transmits an UL grant or PHICH.
  • PUSCH time table (k value) applied by the PUSCH timing configuration method according to the present invention will be described for each TDD setting (TDD setting 0 to TDD setting 6) used by the ordering serving cell, and HARQ timing according to the present invention.
  • TDD setting TDD setting 0 to TDD setting 6
  • HARQ time table k PHICH An example of the HARQ time table k PHICH to which the configuration method is applied will be described.
  • Table 6 below shows k values when the ordering CC uses the TDD setting 0.
  • Table 7 shows the k PHICH value when the ordering CC uses the TDD setting 0.
  • the TDD HARQ RTT can be configured for up to 16 TDD HARQ RTTs up to 16. If the TDD HARQ RTT is configurable up to 20, the TDD HARQ RTT can be configured up to 20. It was.
  • TDD HARQ RTT is configurable up to 16, if MSB of UL index is 1, server frame # n + k is PUSCH timing, ULB of LSB is 1 or PHICH is subframe # When transmitted in 6, subframe # n + 7 is PUSCH timing.
  • the UL index may be used as follows.
  • subframe # n + 7 and subframe # n + k are PUSCH timings.
  • I PHICH has a value of 1 when the PUSCH transmission is scheduled in subframe # 4 and 0 otherwise.
  • Table 8 below shows k values when the ordering CC uses TDD setting 1.
  • Table 9 shows the k PHICH value when the ordering CC uses TDD setting 1.
  • Table 10 below shows k values when the ordering CC uses TDD setting 2.
  • Table 11 shows the k PHICH value when the ordering CC uses TDD configuration 2.
  • Table 12 below shows k values when the ordering CC uses TDD configuration 3.
  • Table 13 below shows a k PHICH value when the ordering CC uses TDD configuration 3.
  • Table 14 below shows k values when the ordering CC uses TDD setting 4.
  • Table 15 below shows the k PHICH value when the ordering CC uses TDD setting 4.
  • Table 16 below shows k values when the ordering CC uses TDD setting 5.
  • Table 17 below shows the k PHICH value when the ordering CC uses TDD setting 5.
  • Table 18 below shows k values when the ordering CC uses TDD setting 6.
  • Table 19 below shows the k PHICH value when the ordering CC uses TDD configuration 6.
  • the UL grant is transmitted from the ordering serving cell and the PHICH is transmitted from the following serving cell. Therefore, only the k value for the UL grant is newly configured, and the rest follows the k value and the k PHICH value of the following serving cell.
  • FIG. 14 is a flowchart illustrating another example of a method of configuring HARQ timing according to the present invention.
  • a position of a subframe that transmits UL grant scheduling information in scheduling for a following serving cell is defined as a position of a DL subframe of an ordering serving cell (S1400).
  • the positions of the DL subframe (but not the PDCCH) and the UL subframe of the following serving cell are defined based on the TDD configuration information of the following serving cell (S1405).
  • the timing of transmitting the UL grant is configured to be at least 4 ms before the UL subframe (S1410).
  • the UL grant is configured to be transmitted at different DL timings for all UL subframes (S1430).
  • UL grants may not be given at different DL timings for all UL subframes.
  • at least all DL subframes of the ordering serving cell are configured to give UL grants for different UL timings of the following serving cells (S1440).
  • the sum of k values capable of transmitting the UL grant is configured to be the minimum (S1450).
  • the process except for transmitting the UL grant is configured according to the k value and the k PHICH value of the following serving cell according to the configuration method of FIG. 9 or 11 (S1460).
  • the PHICH transmission timing in the following serving cell and the DL timing in the ordering serving cell are the same, adaptive UL HARQ may be limitedly performed only for the timing (S1470). Of course, it can be set differently for each base station.
  • the terminal and the base station may know the HARQ timing information of Table 4 and Table 5 in advance.
  • the UE stores the HARQ timing information of Table 4 and Table 5 in advance in a memory, and may operate in a manner of using the information when necessary.
  • the UE may know TDD configuration information of each serving cell through TDD configuration information (TDD-Config) transmitted through RRC signaling, and may know HARQ timing information of the corresponding serving cell based on this.
  • TDD-Config TDD configuration information
  • a UE receives a NACK with a UL grant or PHICH at a specific timing
  • the PUSCH timing and the PUSCH timing for the corresponding UL grant or NACK based on HARQ timing information (k value or k PHICH value table) known to the terminal.
  • the PHICH timing information about may be known.
  • the base station also receives the PUSCH from the terminal at a specific timing, it can know the PHICH transmission timing information for the corresponding PUSCH.
  • the HARQ timing information may be configured according to a table configured by the method of FIGS. 9 to 14.
  • cross carrier scheduling information is shown in the following table.
  • cif-Presence indicates whether the CIF exists in the PDCCH DCI format (TRUE) or not (FALSE).
  • Pdsch-Start is the first OFDM symbol of the PDSCH for the following serving cell (or secondary serving cell), and 1,2,3 values can be applied when the dl_Bandwidth for the following serving cell is greater than 10 RB, and the following When dl-Bandwith for the serving cell is less than or equal to 10RB, 2,3,4 values may be applied.
  • schedulingCellId indicates whether a cell (meaning an ordering cell) signals a downlink allocation or an uplink grant when cross-carrier scheduling is applied to a considered serving cell (following cell).
  • the base station may transmit the PUSCH timing and the PHICH timing to the terminal through the PDCCH.
  • the base station transmits the PDCCH for the following serving cell to the terminal through the ordering serving cell, where the PDCCH may include the PUSCH timing information transmitted by the terminal and the PHICH timing to be received by the terminal.
  • the ULQ 2 bits may be used to command HARQ timing different from the HARQ timing information table.
  • the UE since the UE knows what the UL index constructed by the method of FIGS. 9 to 14 is used in the corresponding TDD configuration, the UE may know the PUSCH timing using only 2 bits.
  • Example 2 a method of configuring UL HARQ timing by performing cross-subframe scheduling in a TDD system to which eICIC is applied will be described. do.
  • a first type there is a case where one UE performs PUSCH scheduling for two UL subframes having different UL grant information.
  • the uplink transmissions since two uplink transmissions are scheduled by one UL grant information, the uplink transmissions have the same resource allocation information, PHICH resource information, demodulated reference signal (DM RS), cyclic shift information, and the like.
  • one UE may perform PUSCH scheduling for two UL subframes in which two UL grant information are different from each other in one DL subframe.
  • two different UL subframes have different UL grant information (PHICH resource, resource allocation, DMRS cyclic shift information, etc.).
  • Subframe bundling refers to a TTI bundling configuration for subframe transmission.
  • the TTI bundling is used to increase the UL coverage in the LTE system.
  • the same data having the same HARQ process number is transmitted on four consecutive UL subframes in four consecutive UL subframes. Can be.
  • TTI bundling When TTI bundling is used, additional signaling overhead can be avoided when retransmission occurs and the same data is transmitted in four consecutive subframes, thereby improving reliability of data transmission and UL coverage. It is also effective in time-sensitive traffic models such as VoIP.
  • Table 21 below relates to the index l representing the PHICH timing for the TTI bundled UL subframe.
  • Subframe # n-l is the PHICH timing for four ULs that are TTI bundled.
  • TDD configuration 1 TDD configuration 1
  • TDD configuration 6 TDD configuration 6
  • the sequence is continued from subframe # n + k using the k value of Table 4 above.
  • PUSCH is transmitted in four UL subframes, and PHICH for four UL subframes TTI-bundled in subframe #nl is transmitted using the l value of Table 6 above.
  • the PHICH carries a 1-bit ACK / NACK signal corresponding to the PUSCH for one UE.
  • the 1-bit ACK / NACK signal performs channel coding using repetition coding at a code rate 1/3.
  • the ACK / NACK signal coded with a 3-bit codeword is generated by 12 BPSK symbols through BPSK modulation and mapped to three modulation symbols.
  • the modulation symbols are spread using an orthogonal sequence of Spreading Factor (SF) N PHICH SF .
  • the number of orthogonal sequences used for spreading is twice that of N PHICH SF to apply I / Q multiplexing.
  • 2N SF PHICH orthogonal 2N SF PHICH of PHICH is spread by using the sequences are defined as one PHICH group. PHICHs belonging to the same PHICH group are distinguished through different orthogonal sequences.
  • Spreaded symbols are hierarchically mapped according to rank. Hierarchically mapped symbols are mapped to resource elements, respectively.
  • the PHICH resource corresponding to the PUSCH is defined using a PRB_Physical Resource Block (PRB) index I PRB_RA of a resource used for the PUSCH and a cyclic shift n DMRS of a 3-bit data demodulation reference signal field used for the PUSCH.
  • the demodulation reference signal refers to a reference signal used for demodulation of data transmitted on the PUSCH.
  • I PRB_RA is associated when the number of TBs indicated in the first TB (Transport Block) of the PUSCH associated with the PDCCH, or the most recent PDCCH associated with the PUSCH is not equal to the number of TBs known negatively. For the case where there is no PDCCH, it is defined as I lowest_index PRB_RA .
  • the second TB of the PUSCH associated with the PDCCH is defined as I lowest_index PRB_RA +1.
  • the PHICH resource is known by an index pair (n group PHICH , n seq PHICH ), and is given by the following equation.
  • n group PHICH is a PHICH group number
  • n seq PHICH is an orthogonal sequence index in the PHICH group.
  • I PHICH is 1 when PUSCH transmission is made in subframe # 4 or subframe # 9 in TDD UL / DL configuration 0, and 0 otherwise.
  • n group PHICH has a value between 0 and (N group PHICH- 1), and the number of PHICH groups N group PHICH is given by the following equation in the FDD system.
  • N DL RB is the total number of resource blocks in the downlink subframe and corresponds to the downlink bandwidth.
  • PHICH resource N g N 1/6, 1/2, 1, 2 ⁇ , which is obtained from a master information block (MIB) on a physical broadcast channel (PBCH).
  • MIB master information block
  • PBCH physical broadcast channel
  • the PHICH resource may be referred to as a parameter for obtaining the number of PHICH groups.
  • N PHICH group has a different number according to m i ⁇ N PHICH group by N PHICH group according to m i and the expression (2) according to the downlink subframe.
  • Table 22 shows the values of m i in the TDD system.
  • the MIB includes PHICH resource N g which is resource allocation information for acquiring the resource region of the PHICH in the control region.
  • the reason why the resource allocation of the PHICH is included in the MIB is that the UE needs to know the resource region of the PHICH in order to receive the PDCCH.
  • the PDCCH is allocated in the region except for the resource region to which the PCFICH and PHICH are allocated. Since the MIB is cell-specific signaling, the N group PHICH is cell specific information, and the n group PHICH may be differently allocated according to the terminal.
  • Table 23 shows an orthogonal sequence of PHICHs for an orthogonal sequence index n seq PHICHs .
  • Table 24 below relates to mapping of cyclic shifts of a DMRS field in a PDCCH of n DMRS and UL DCI format 0/4.
  • eICIC Inter Cell Interference Coordination
  • eICIC is a method that can mitigate interference between multiple cells (eg, between a single macro cell and a pico cell or femto cell phase in a macro cell) in a hetero network situation.
  • the aggressor cell By controlling downlink transmission of the aggressor cell in units of time in inter-cell interference, the downlink of the aggregator cell base station in the inter-cell interference without performing a separate operation at the base station of the Victim cell. The influence of interference due to link transmission can be reduced.
  • inter-cell interference coordination is a method for supporting a reliable communication to a user when a user belonging to a Victim cell is near an aggregator cell.
  • a scheduler may be imposed on the use of certain time and / or frequency resources. It may also impose a constraint on the scheduler how much power to use for a particular time and / or frequency resource.
  • a downlink subframe pattern of cells may be configured.
  • the pattern of subframes refers to an arrangement of subframes repeated at regular periods.
  • the pattern of the subframe may be composed of various subframes.
  • the pattern of the subframe may include an array of low interference subframes that generate less interference between cells, such as a normal subframe and an almost blank subframe (ABS) or a fake subframe. It can be configured repeatedly at regular intervals.
  • ABS almost blank subframe
  • ABS refers to a subframe used to protect a resource that is interfered with by a strong cell. ABS reduces backward transmission power such as control information, data information, and signaling (signals transmitted for channel measurement and synchronization) and transmits backwards compatibility. For this purpose, only control information, data information, signaling, and system information necessary for the terminal can be transmitted. As an ABS, a MBSFN subframe may be used.
  • Fake subframe can be defined in two types.
  • a DL subframe can be used as a fake UL subframe, where the fake UL subframe is a UL subframe that cannot transmit all signals that can be transmitted in UL.
  • a UL subframe can be used as a fake DL subframe, which is a DL subframe that cannot transmit all signals that can be transmitted to the DL. That is, the terminal determines that the fake UL subframe is a UL subframe but cannot operate as a UL subframe, and the terminal determines that the fake DL subframe is a DL subframe but cannot actually operate as a DL subframe.
  • a DL subframe may be used as a fake UL subframe, and unlike the first type, a fake UL subframe may be defined to operate as a UL subframe.
  • the fake UL subframe may transmit all signaling (SRS, PUCCH, PUSCH) and the like that can be transmitted to the UL.
  • SRS signaling
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Control Channel
  • the fake DL subframe may operate as a DL subframe.
  • the fake DL subframe can transmit all signaling (PHICH, PCFICH, CRS, PDCCh, PDSCH) that can be transmitted to the DL.
  • a normal subframe means a subframe excluding an ABS or fake subframe.
  • the ABS pattern refers to a subframe pattern including an ABS or fake subframe.
  • the ABS pattern may have a 20 ms period for the TDD settings 1 to TDD 5, a 70 ms period for the TDD setting 0, and a 60 ms period for the TDD setting 6.
  • subframe # 8 and subframe # of the aggregator cell in order to reduce interference with the UL subframe of subframe # 2 and subframe # 3 of the victor cell (TDD configuration 1).
  • PUSCH scheduling UL grant transmission
  • the subframe capable of transmitting the UL grant is predetermined.
  • the number of subframes capable of transmitting UL grants may be reduced and UL resources may not be used when these subframes are used as ABS. Also, considering all these timings, the configuration of the ABS pattern is limited.
  • the UE needs to know the ABS (or fake subframe) pattern in advance so that the UE can transmit the PUSCH at the PUSCH timing.
  • ABS or fake subframe
  • the UE can know the ABS pattern through the measurement pattern information per ABS pattern period transmitted through the RRC signaling.
  • the DL subframe is determined when the cell configuration information is determined.
  • the subframe may be determined as ABS.
  • the bitmap information refers to the transmission of the subframePatternTDD information transmitted in Table 25 as a bit string.
  • the UE may receive a PUSCH scheduling in a subframe capable of substituting the ABS according to the present invention, and may proceed with UL HARQ based on this.
  • the ABS pattern can be known through the ABS / fake subframe pattern information transmitted through RRC signaling.
  • the ABS / fake subframe pattern information may be transmitted through a bitmap, or may be transmitted as an ABS / fake pattern index value as shown in Table 11 including the ABS / fake subframe pattern information.
  • the information on the ABS pattern and the information on the fake subframe pattern may be transmitted separately.
  • Each pattern information may be transmitted as a bitmap or as an index value as shown in Table 11 below.
  • Table 26 shows the ABS / fake pattern index for the ABS / fake subframe pattern expressed as a bitmap. For 20ms period of TDD setting 1.
  • bitmap If the bitmap is 0, it means ABS / fake subframe, and if 1, it means normal subframe.
  • Table 26 shows an example of expressing 3 bits with respect to TDD configuration 1 and may have different indices according to each TDD configuration.
  • the fake subframe pattern information may be implicitly known by the terminal according to the following method.
  • a DL subframe capable of giving the first UL grant among the DL subframes after the subframe to which the cross subframe scheduling is applied may be recognized as a fake UL subframe.
  • the subframe to which the UL grant is transmitted is ABS (or fake UL sub).
  • Frame when performing UL HARQ on behalf of this subframe, and cross-subframe scheduling when a subframe to which UL grant is to be transmitted is used as an ABS (or fake UL subframe).
  • the UL HARQ timing configuration method includes PUSCH scheduling and PHICH scheduling.
  • the following UL HARQ timing configuration method may be performed by a terminal or a base station, and since the terminal and the base station know the UL HRAQ timing information according to the present invention, the UL HARQ timing according to the present invention may be performed. Can be.
  • the base station may also transmit UL HARQ timing information while transmitting UL grant information.
  • the ABS or fake UL subframe can transmit the PHICH, it is required to configure so that the UL grant of the ABS or fake UL subframe can be transmitted instead in the closest DL subframe.
  • 16 is a flowchart illustrating an example of a method of configuring UL HARQ timing according to the present invention.
  • UL HARQ timing is configured such that the UL HARQ RTT (Round Trip Time) is 10 or more and 16 or less (S1605).
  • the k value configures UL HARQ timing to be greater than or equal to 4 (S1610).
  • each ABS is configured to be replaced by a normal DL subframe that did not transmit different UL grants
  • UL HARQ timing is configured such that the sum of k values is minimum (S1615).
  • the UL HARQ timing is configured to transmit the UL grant in the DL subframe in which the RTT is the minimum (S1620).
  • UL HARQ is performed based on the UL HARQ timing configured as described above (S1635).
  • the UL HARQ timing is configured to perform cross-subframe scheduling in the nearest DL subframe of the previous DL subframe of the ABS (or fake UL subframe) (S1625).
  • UL HARQ timing is configured to perform cross-subframe scheduling in a DL subframe capable of minimizing k value while allowing k value of 4 ms or more among DL subframes closest to the ABS or fake UL subframe (S1630). .
  • a cross subframe scheduling indicator indicating whether cross subframe scheduling is performed in UL HARQ may be included in DCI format 0/4.
  • the cross subframe scheduling indicator may be 1 bit, and in this case, 1 bit may be added to DCI format 0/4. When the indicator is 1, it may indicate that cross subframe scheduling is performed, and when 0, it may indicate that cross subframe scheduling is not performed. The opposite may be true.
  • the cross subframe scheduling indicator may be added to RRC signaling and may also be 1 bit. If the cross subframe scheduling indicator (1 bit) transmitted through RRC signaling is 1, it indicates that the cross subframe scheduling is performed, and the UE includes the cross subframe scheduling indicator in DCI format 0/4, so that DCI format 0/4 is included. It may be determined that the length of 1 is added by 1 bit, and the DCI format 0/4 may be decoded. On the other hand, if the cross subframe scheduling indicator 1 bit transmitted through RRC signaling is 0, it indicates that the cross subframe scheduling is not performed, and the UE interprets the length of DCI format 0/4 as the original length to DCI format 0 Can decode / 4 Of course, the opposite can also be true.
  • the UL HARQ is transmitted based on the UL HARQ timing configured using the cross subframe scheduling (S1635).
  • the UL HARQ timing it is required to configure the UL HARQ timing so that not only the UL grant timing but also the PHICH timing can be transmitted instead in the other DL subframe closest to the ABS or fake UL subframe.
  • 17 is a flowchart illustrating another example of a method of configuring UL HARQ timing according to the present invention.
  • UL HARQ timing is configured so that the UL HARQ RTT is 10 or more and 16 or less (S1705).
  • the k value and the k PHICH value configure UL HARQ timing to be greater than or equal to 4, respectively (S1710).
  • the UL HARQ timing is configured to transmit the UL grant in the DL subframe corresponding to the PHICH timing (S1715).
  • UL HARQ timing is configured to minimize RTT (S1720).
  • each ABS is configured to be replaced by a different DL subframe, and the sum of k values and k PHICHs of DL subframes to be substituted is substituted.
  • UL HARQ timing is configured to be the minimum (S1725).
  • the m i value of Table 22 must also be changed. Instead of the ABS or fake UL sub-frame to transmit the PHICH and replace the value m i of the DL subframe to the value m i of the ABS or fake UL subframe. At this time, the m i value corresponding to the ABS or fake UL subframe is set to 0 (S1727).
  • FIG. 18 is a diagram illustrating k values configured by the UL HARQ timing configuration method described with reference to FIG. 17, and FIG. 19 is a diagram illustrating k PHICH configured by the UL HARQ timing configuration method described with reference to FIG. 17.
  • the values indicated by the arrows represent k values and k PHICH values according to UL HARQ timing newly configured according to the present invention.
  • downlink subframe # 4 when downlink subframe # 4 is used as an ABS or fake subframe in TDD configuration 1, UL grant and PHICH are not transmitted in UL HARQ according to Tables 4 and 5, and subframe # 4 and The UL grant may be transmitted instead in the closest normal downlink subframe # 0.
  • the PHICH timing for UL subframe # 8 was previously subframe # 4
  • the PHICH may be transmitted instead in the normal downlink subframe # 5 closest to the subframe # 4.
  • the UL grant may be transmitted in subframe # 5 instead of subframe # 9, and the PHICH for subframe # 3 may also be transmitted in subframe # 0 instead of subframe # 9. have.
  • 20 is a diagram illustrating a value of l according to a newly configured UL HARQ timing when subframe bundling is configured according to the present invention.
  • a value indicated by an arrow indicates an l value according to a UL HARQ timing newly configured according to the present invention. It may be used as PHICH timing for subframe bundling in a subframe capable of PUSCH scheduling instead of the ABS.
  • step S1700 of FIG. 17 when the UL grant and the PHICH are not transmitted and there are no available DL subframes, that is, the number of ABS (or fake UL subframes) is equal to the PUSCH scheduling information among the normal DL subframes. If the number of DL subframes that are available without transmitting PHICH scheduling information is larger than that, the UL grant is configured to perform cross subframe scheduling in the nearest DL subframe among the previous DL subframes of the ABS, and transmit a value of k.
  • the UL HARQ timing is configured to be greater than or equal to and have a minimum value (S1730).
  • UL HARQ timing is configured to perform cross subframe scheduling as in steps S1625 to S1630 of FIG. 16.
  • a cross subframe scheduling indicator indicating whether cross subframe scheduling is performed in UL HARQ may be included in DCI format 0/4.
  • the cross subframe scheduling indicator may be 1 bit, and in this case, 1 bit may be added to DCI format 0/4. If the indicator is 1, it may indicate that the cross subframe scheduling is performed. If the indicator is 0, it may indicate that the cross subframe scheduling is not performed.
  • the cross subframe scheduling indicator may be added to RRC signaling and may also be 1 bit.
  • the cross subframe scheduling indicator (1 bit) transmitted through RRC signaling is 1, it indicates that the cross subframe scheduling is performed, and the UE includes the cross subframe scheduling indicator in DCI format 0/4, so that DCI format 0/4 is included. It may be determined that the length of 1 is added by 1 bit, and the DCI format 0/4 may be decoded.
  • the terminal interprets the length of DCI format 0/4 to the original length to DCI format 0 Can decode / 4
  • the PHICH timing may be configured using bundling or multiplexing (S1735).
  • PHICH timing may be configured using bundling.
  • a PHICH that cannot be received due to the ABS (or fake UL subframe) may be replaced with an ACK / NACK for the DL subframe closest to the subframe 4 ms after the existing PUSCH timing of the ABS (or fake UL subframe). That is, ACK / NACK for the closest DL subframe may be used as a response for two PUSCHs.
  • the base station transmits NACK if any of the two PUSCH is NACK.
  • the UE determines that the base station has transmitted ACK for all PUSCHs, and if the ACK / NACK of the closest DL subframe is NACK, the base station is determined for all PUSCHs. It is determined that the NACK is transmitted.
  • PHICH timing may be configured using multiplexing.
  • a PHICH that cannot be received due to an ABS (or fake UL subframe) may be transmitted by multiplexing ACK / NACK in the DL subframe closest to 4 ms after the existing PUSCH timing of the ABS (or fake UL subframe).
  • it is applicable only to a case where PUSCH scheduling is performed for two UL subframes in which one UL grant information is different from each other in the first type of two types of definitions of cross subframe scheduling.
  • the two uplink transmissions are scheduled by one UL grant information, they have the same resource allocation information, PHICH resource information, and DM RS cyclic shift information.
  • a cross subframe scheduling indicator indicates cross subframe scheduling
  • a method of distinguishing ACK / NACK for multiplexing PUSCH data scheduled for cross subframe scheduling will be described.
  • n DMRS value and the I PRB_RA value are changed in the present invention, this only affects PHICH resources and PHICH Orthogonal Complementary Code (OCC) for ABS (or fake UL subframe), and performs cross-subframe scheduling.
  • OCC PHICH resources and PHICH Orthogonal Complementary Code
  • ACK / NACK may be multiplexed to indicate a PHICH for data.
  • the additional 3 bits are transmitted only when the cross subframe scheduling indicator downlinking through the RRC signaling indicates the cross subframe scheduling.
  • the UE determines the length of the DCI format 0/4 from the existing DCI format 0/4. Recognize that it is 3 bits long and decode DCI format 0/4.
  • n seq PHICH (OCCC of PHICH) and n group PHICH (PHICH resource) for PUSCH data scheduled for cross-subframe scheduling are known as "the last TB of n DMRS (3 bits). Can be determined by +1 ". That is, the resource allocation information may be instructed to allocate another resource using an offset value (for example, "1").
  • the newly configured n seq PHICH and n group PHICH are as follows.
  • n is "the number of TBs scheduled in one UL grant-1", where the number of TBs includes the number of TBs scheduling cross subframes.
  • I PRB_RA is always I lowest_index PRB_RA
  • k is “the number of original TBs scheduled in one UL grant minus 1”, where the number of original TBs is the number of TBs scheduled for cross-subframe scheduling. It means the number of TBs excluded.
  • the OCC and PHICH resources of the PHICH for the cross-subframe scheduled TB1 and TB2 are as shown in Equations 4 and 5, respectively.
  • I also PRB_RA in the following Equation 4 and 5 is I lowest_index PRB_RA regardless TB 1 and 2.
  • an OCC (n seq PHICH ) and a PHICH resource (n group PHICH ) of a PHICH for PUSCH data scheduled for cross-subframe scheduling are known as an XOR of n DMRS (3 bits) of the last TB. (exclusive or) operation result ".
  • an OCC (n seq PHICH ) and a PHICH resource (n group PHICH ) of a PHICH for PUSCH data scheduled for cross-subframe may be determined by an existing " last TB I PRB_RA + 1 ". Can be. This is as follows.
  • n is "the number of TBs scheduling in one UL grant-1", where the number of TBs includes the number of TBs scheduling cross subframes.
  • I PRB_RA is always I lowest_index PRB_RA .
  • I PRS_RA is always I lowest_index PRB_RA .
  • I PRB_RA and n DMRS +1 instead of the existing I PRB_RA and n DMRS .
  • I PRB_RA I lowest_index PRB_RA + 1
  • n PRB_RA and n DMRS +1 instead of n DMRS for TB1, and TB2 for TB1 .
  • I PRB_RA +1 I PRB_RA +1
  • n DMRS +1 I PRB_RA and n DMRS .
  • the n seq PHICH and the PHICH resource n group PHICH of the PHICH for the cross-subframe scheduled TB1 and TB2 (PUSCH) are the following Equations 8 and 9, respectively.
  • I PRB_RA is I lowest_index PRB_RA regardless of TB 1 and 2.
  • step S1735 the UL HARQ is transmitted based on the UL HARQ timing configured using the cross subframe scheduling (S1740).
  • FIG. 21 illustrates configuring PHICH timing using multiplexing according to the present invention. It relates to the PUSCH timing of TDD configuration 6 in an eICIC situation.
  • subframe # 9 is an ABS (or fake UL subframe)
  • UL grants G4 and G5 are transmitted using sub-subframe scheduling in subframe # 6.
  • the PHICH timing for PUSCH U4 is I4, which is subframe # 9, that is, ABS (or fake UL subframe). Therefore, the PHICH timings I5 and I4 for U5 are multiplexed and transmitted.
  • FIG. 22 shows a result of resource allocation performed by using ACK / NACK multiplexing according to the present invention when N group PHICH is 4.
  • n seq PHICH of TB1 is 0, n group PHICH is 0, n seq PHICH of TB2 is 0, and n group PHICH is 1.
  • n seq PHICH OCC of PHICH
  • n group PHICH PHICH resource
  • n seq PHICH OCC (n seq PHICH ) and PHICH resource (n group PHICH ) of the PHICH for the PUSCH data scheduled for cross subframe are determined by the existing "I PRB_RA +1 of the last TB", n seq PHICH of TB1 Is 0, n group PHICH is 2, n seq PHICH of TB2 is 0, and n group PHICH is 3.
  • n seq PHICH PHICH resource (n group PHICH ) of PHICHs for PUSCH data scheduled for cross-subframe scheduling
  • I PRB_RA and “n DMRS +1” instead of I PRB_RA and n DMRS of the original last TB for TB1.
  • Is determined by " I PRB_RA + 1 " and " n DMRS + 1 " instead of I PRB_RA and n DMRS of the original last TB for TB2
  • n seq PHICH is 1 and n group PHICH is 2
  • N seq PHICH of TB2 is 1 and n group PHICH is 3.
  • the terminal and the base station preconfigure HARQ timing information configured according to FIGS. 16 and 17 of the present invention, and then UL according to the present invention. Send HARQ.
  • the terminal recognizes the ABS or fake subframe pattern through the RRC signaling, and instead of the corresponding ABS or fake subframe UL HARQ according to the UL HARQ timing according to the present invention Perform.
  • the base station transmits ABS and fake subframe pattern information to the terminal and then performs UL HARQ according to the UL HARQ timing according to the present invention.
  • Embodiment 3 a method for determining the reception timing of an optimized TPC command of an ordering serving cell for a following serving cell and controlling the transmission power of the terminal How to do it.
  • Uplink power control is to control each different uplink physical channel.
  • transmit power Is first scaled by the number of antennas for which at least one PUSCH transmission is performed and the number of antennas configured according to the transmission scheme. The adjusted total power is equally divided and allocated for antennas in which at least one PUSCH transmission is performed.
  • PUCCH or SRS the transmission power or Is equally assigned to the antenna ports configured for PUCCH or SRS.
  • the UE transmits the power P PUSCH, c (i) defined as follows for PUSCH transmission in subframe #i for the serving cell c. do.
  • a power P PUSCH, c (i) defined as in the following equation is transmitted.
  • P CMAX, c (i) is the maximum terminal transmission power configured for the serving cell c Is a linear conversion of P CMAX, c (i) dB. Is a value obtained by linearly converting a P PUCCH (i) value and will be described below.
  • M PUSCH, c (i) is a value in which the bandwidth of a resource allocated with a PUSCH in subframe #i for the serving cell c is expressed by the number of RBs.
  • P O_PUSCH, c (j) is the sum of P O_NOMINAL_PUSCH, c (j) and P O_UE_PUSCH, c (j) determined by signaling of a higher layer when j value for the serving cell c is 0 and 1.
  • j in the case of semi-persistent grant PUSCH transmission (or retransmission), j has a value of "0".
  • j has a value of "1" for dynamic scheduled grant PUSCH transmission (or retransmission).
  • j has a value of "2".
  • P O_PRE preambleInitialReceivedTargetPower
  • the 3-bit parameter provided by the upper layer One of the values can be selected. If j is "2" is always ⁇ c (j) it is one.
  • PL c refers to an estimated downlink path attenuation value for the serving cell c calculated by the terminal (in dB), and its value is expressed by the following equation.
  • referenceSignalPower is a value provided by an upper layer and is provided in dBm as an Energy Per Resource Element (EPRE) value of a downlink reference signal.
  • Reference Signal Received Power is a reception power value of a reference signal for a reference serving cell.
  • the determination of the serving cell selected as the reference serving cell and the referenceSignalPower and higherlayerfilteredRSRP used for the calculation of the PL c is configured by the pathlossReferenceLinking which is an upper layer parameter.
  • the reference serving cell configured by the pathlossReferenceLinking may be a DL SCC of a primary serving cell or a secondary serving cell correlated with a UL CC and SIB2.
  • K s in Equation 10 When K s in Equation 10 is 1.5, And zero when K s is zero.
  • K s is given from the parameter deltaMCS-Enabled provided by the higher layers for each of the serving cells c, BPRE and ⁇ PUSCH offset .
  • transmission mode 2 which is a mode for transmission diversity, K s is zero.
  • the BPRE is O CQI / N RE . to be.
  • C is the number of code blocks
  • K r is the size of the code blocks
  • O CQI is the number of CQI / PMI bits including the number of CRC bits
  • N RE is the number of determined resource elements. In other words, to be.
  • ⁇ PUSCH, c refers to a transmit power control (TPC) command present in DCI format 0 or 4 for serving cell c or a TPC command in DCI format 3 / 3A that is coded and transmitted jointly with other terminals.
  • TPC transmit power control
  • the RNTI value may be assigned a different RNTI value for each serving cell to distinguish each of the serving cells when an arbitrary terminal is configured with a plurality of serving cells.
  • the transmission power may be controlled by adjusting ⁇ PUSCH, c .
  • the PUSCH power control adjustment state for the current serving cell c is given by f c (i) and is defined as follows.
  • ⁇ PUSCH, c (iK PUSCH ) is a TPC command in DCI format 0/4 or 3 / 3A in the PDCCH that was transmitted in the iK PUSCH th subframe, and f c (0) is the first value after a cumulative reset.
  • K PUSCH in case of FDD, K PUSCH is 4, and when TDD is 1 to 6, K PUSCH values are shown in Table 27 below.
  • a portion indicated by "-" is a DL subframe and a portion indicated by a number is a UL subframe.
  • the UE attempts to decode the PDCCH in all subframes except when the DRX (discontinous reception) operation.
  • the UE should use only ⁇ PUSCH, c of DCI format 0/4.
  • ⁇ PUSCH, c is 0dB when there is no TPC command for the serving cell c, during DRX operation, or when the corresponding subframe is an UL subframe of TDD.
  • the accumulated delta PUCCH dB values are -1, 0, 1, 3, respectively. If the PDCCH of DCI format 0 is approved as an SPS activation or release PDCCH, ⁇ PUSCH, c is 0 dB.
  • the accumulated ⁇ PUCCH dB values are -1 and 1, respectively.
  • the positive TPC command will not accumulate. If the terminal reaches the minimum power, negative TPC commands will not accumulate.
  • Equation 10 when accumulation is deactivated by the upper layer with respect to the serving cell c, f c (i) is as follows.
  • ⁇ PUSCH, c (iK PUSCH ) is transmitted through DCI format 0/4 in PDCCH for serving cell c in subframe #iK PUSCH .
  • the K PUSCH value is 4 for FDD and is given as shown in Table 4 in TDD UL / DL configuration # 1 to # 6.
  • K PUSCH is 7. Otherwise, K PUSCH is given as shown in Table 27 above.
  • f c (i) is equal to f c (i-1). same.
  • f c (0) Is zero.
  • f c (0) ⁇ P rampup + ⁇ msg2 , where ⁇ msg2 is a TPC command indicated by a random access response.
  • ⁇ P rampup is provided by the upper layer and is for the total power ramp-up from the first preamble to the last preamble.
  • the UE transmits the SRS for the serving cell c to the UE transmit power P SRS as shown in the following equation in subframe #i.
  • P CMAX, c (i) is the maximum terminal transmission power configured for the serving cell c This is a linear conversion of dB.
  • P SRS_OFFSET, c (m) is transmitted through 4-bit higher layer signaling.
  • M SRS, c is a bandwidth of the SRS transmitted in subframe #i for the serving cell c, and is expressed as an RB number.
  • f c (i) is a current PUSCH power control adjustment state for the serving cell c.
  • P O_PUSCH, c (j) and ⁇ c (j) are the same as the parameters described in Equations 10 and 11 for the PUSCH.
  • the timing of controlling the transmission power of the SRS according to the present invention is applied in the same manner as the transmission power of the PUSCH according to the present invention.
  • the UE transmits the power P PUCCH, c (i) defined as the following equation for PUCCH transmission in subframe #i for the main serving cell c.
  • P CMAX, c (i) is the maximum terminal transmission power configured for the serving cell c This is a linear conversion of dB.
  • ⁇ F_PUCCH (F) and ⁇ TxD (F ′) are determined through higher layers.
  • h (n CQI , n HARQ , n SR ) has a different value depending on the PUCCH format.
  • P O_PUCCH has a sum of P O_NOMINAL_PUCCH and P O_UE_PUCCH transmitted from a higher layer.
  • ⁇ PUCCH is a UE-specific value, a TPC command transmitted through DCI format 1A / 1B / 1D / 1 / 2A / 2 / 2B / 2C, or a TPC in DCI format 3 / 3A coded and transmitted jointly with other terminals. Determined with reference to the command.
  • the DCI format 3 / 3A since the CRC parity bit is scrambled to TPC-PUCCH_RNTI, only terminals to which the RNTI value is assigned can be identified. In this case, the RNTI value may be assigned a different RNTI value for each serving cell to distinguish each of the serving cells when an arbitrary terminal is configured with a plurality of serving cells.
  • the current PUCCH power control adjustment state is given by g (i) and is defined as follows.
  • M is the number of elements of the set K, that is, the number of downlink subframes associated with the i-th subframe.
  • M is 1 and k 0 is 4.
  • k m is shown in Table 28 below.
  • the delta PUCCH dB value is -1,0,1,3, respectively.
  • ⁇ PUCCH is 0 dB.
  • the ⁇ PUCCH dB value is -1 and 1, respectively, and is semi-statically set by the higher layer.
  • G (0) ⁇ P rampup + ⁇ msg2 .
  • ⁇ msg2 is the TPC command indicated by the random access response
  • ⁇ P rampup is provided by the upper layer, and is the total power ramp-up from the first preamble to the last preamble.
  • the positive TPC command for the main serving cell will not accumulate. If the terminal reaches the minimum power, negative TPC commands will not accumulate.
  • the terminal When the P O_UE_PUCCH value is changed by the higher layer or when the terminal receives the random access response message, the terminal resets the accumulation.
  • g (i) is g (i-1).
  • a transmission power control command is received from the base station through the ordering serving cell, and the terminal applies the transmission power to perform transmission through the following serving cell.
  • the ordering serving cell and the following serving cell have different TDD settings, there is a need for a method of determining a TPC command reception timing so that a UE can properly receive a TPC command and perform transmission.
  • a case where the UE transmits a PUSCH (or SRS) and a case of transmitting a PUCCH will be described.
  • SRS the same method as in the case of transmitting the PUSCH is applied.
  • the ordering serving cell transmits a TPC command to the terminal through a DCI format (for example, DCI format 0/4/3 / 3A), and the terminal transmits the terminal by applying a PUSCH transmission power or an SRS transmission power based on the TPC command. Applies if
  • 23 is a flowchart illustrating controlling uplink transmission power according to the present invention.
  • the UE determines a TPC command reception timing based on the TDD settings of the ordering serving cell (or the first serving cell) and the following serving cell (or the second serving cell) ( S2300).
  • the UE may know in advance what the TDD settings of the ordering serving cell and the following serving cell are, and the base station may transmit the information to the terminal in advance before the terminal determines the reception timing of the TPC command.
  • the timing of receiving a TPC command means that when the UE transmits a PUSCH or SRS in subframe #i (hereinafter, expressing to transmit a PUSCH also includes transmitting an SRS), the subframe #iK that is before the K PUSCH th subframe. refers to a receiving timing (K PUSCH) in the TPC command that is based on a TPC command received on the PUSCH to control the transmit power of the terminal. That is, the UE determines K PUSCH in advance based on TDD settings of each of the ordering serving cell and the following serving cell, and then includes a TPC included in a subframe before the K PUSCH determined among TPC commands included in the PDCCH received from the base station. After applying the transmission power based on the command, the PUSCH or SRS is transmitted to the base station.
  • the subframe of the ordering serving cell transmitting the TPC command related to the control of the uplink transmission power for the following serving cell to the terminal is a DL subframe and is defined based on the TDD configuration of the ordering serving cell. .
  • the position of the UL subframe of the following serving cell in which the UE transmits the uplink transmission power is determined based on the TDD configuration of the following serving cell. Therefore, since different TDD settings are used, the timing of the ordering serving cell corresponding to the subframe to which the TPC command related to the UL subframe of the following serving cell to which the PUSCH or the SRS is to be transmitted is not broken. It is required to determine the TPC command reception timing (K PUSCH ) value so that the frame does not become an UL subframe.
  • the UE receives a PDCCH including a TPC command through an ordering serving cell (S2305), and the UE applies transmission power based on the K PUSCH determined in advance in step S2300, and transmits the PUSCH or SRS to the base station through the following serving cell. It transmits (S2310).
  • the transmission power is applied based on the received TPC command at the timing indicated by the K PUSCH , and then the PUSCH or SRS is transmitted according to the applied transmission power.
  • the base station serves to adjust or control the transmission power
  • the terminal receives the instruction of the base station and applies the same to control the transmission power of the terminal.
  • the TPC command reception timing may be determined by the terminal in advance, but may be determined by the base station and transmitted to the terminal.
  • the TPC command reception timing information may be transmitted together with the TPC command through the PDCCH, or may be separately transmitted to the UE through RRC signaling.
  • the terminal and the base station may know the timing information of Tables 29 to 37 below.
  • the terminal stores the timing information of Table 29 in the memory in advance, and may operate by using the information when necessary.
  • the UE may know TDD configuration information of each serving cell through TDD configuration information transmitted through RRC signaling, and may know timing information of the corresponding serving cell based on this.
  • the UE may know the PUSCH timing information for the corresponding TPC command based on the timing information (K PUSCH value table) known to the UE.
  • the base station can also know the PUSCH timing information for a specific TPC command.
  • the timing information is configured according to a table configured by the method of FIG.
  • Cross carrier scheduling information is shown in the following table.
  • cif-Presence indicates whether the CIF exists in the PDCCH DCI format (TRUE) or not (FALSE).
  • Pdsch-Start is the first OFDM symbol of the PDSCH for the following serving cell (or secondary serving cell), and 1,2,3 values can be applied when the dl_Bandwidth for the following serving cell is greater than 10 RB, and the following When dl-Bandwith for the serving cell is less than or equal to 10RB, 2,3,4 values may be applied.
  • schedulingCellId indicates whether a cell (meaning an ordering cell) signals a downlink allocation or an uplink grant when cross-carrier scheduling is applied to a considered serving cell (following cell).
  • the base station may transmit the PUSCH timing, the SRS timing, and the aperiodic CSI timing to the terminal through the PDCCH.
  • the base station transmits the PDCCH for the following serving cell to the terminal through the ordering serving cell, where the PDCCH may include PUSCH timing information transmitted by the terminal, SRS timing, and aperiodic CSI timing.
  • the UL index 2 bits or 1 bit may be used to command HARQ timing different from the TPC command reception timing (K PUSCH ) table.
  • K PUSCH TPC command reception timing
  • FIG. 24 is a flowchart illustrating an example of a method of determining a TPC command reception timing (K PUSCH ) according to the present invention.
  • a DL subframe of an ordering serving cell transmitting a TPC command to a UE is 4ms before a UL subframe of a following serving cell transmitting a PUSCH or SRS, that is, K PUSCH is greater than four.
  • the TPC command reception timing of the terminal is determined to be greater than or equal to (S2400).
  • determining the TPC command reception timing is determined according to whether the number of UL subframes of the following serving cell is larger than the number of DL subframes of the ordering serving cell.
  • the TPC command is performed through DL subframes of different ordering serving cells for all UL subframes of the following serving cell.
  • the DL subframes of the ordering serving cell may determine a timing to receive a TPC command with respect to UL subframes of different following serving cells (S2405). That is, UL subframes of the following serving cells are matched with DL subframes of different ordering serving cells.
  • the value of the TPC command is minimized, i.e., to have a min (sum [total (K PUSCH )]) determined the K PUSCH (S2410).
  • the TPC command in the DL subframes of different ordering serving cells for all UL subframes of the following serving cell It is not possible to determine the timing of receiving the TPC command to send a. That is, at least one DL subframe of the ordering serving cell should determine the TPC command reception timing to transmit TPC commands for the plurality of UL subframes of the following serving cell.
  • the ordering serving cell is TDD configuration 0 and the following serving cell is TDD configuration 6.
  • K PUSCH is determined to transmit a TPC command for each different UL subframe of the following serving cell in all DL subframes of the ordering serving cell (S2415). This is to minimize the number of UL subframes of the ordering serving cell transmitting TPC commands for a plurality of UL subframes of the following serving cell.
  • one DL subframe of the ordering serving cell is determined using the 1-bit UL index according to the present invention (S2420). .
  • the UL index according to the present invention may have a size of 1 bit.
  • the UL index may be included in the DCI format for transmitting the TPC command, and the UE may decode the DCI format for transmitting the TPC command to a length of 1 bit added according to the configuration of the ordering serving cell and the following serving cell.
  • the terminal or the base station may be set in advance to have different K PUSCH values when the UL index is set to "0" and when it is set to "1". For example, if the UL index is set to "0", K PUSCH may be 6, and if the UL index is set to "1", K PUSCH may be 7.
  • the terminal or the base station may know in advance about the UL index.
  • the value of the TPC command is minimized, i.e., to have a min (sum [total (K PUSCH )]) determined the K PUSCH (S2410) .
  • 25 illustrates a method of determining a K PUSCH value according to the present invention.
  • the ordering serving cell is TDD setting 6 of the following serving cell when the TDD setting is 0
  • the following serving cell is TDD configuration 6 as in the case of Table 27
  • the subframe # of the ordering serving cell whose K PUSCH value for subframe 4 is "5" and is 5 subframes before subframe # 4. 9 cannot receive a TPC command because it is a UL subframe (S800). Therefore, according to the method of FIG. 24, a new K PUSCH value is configured to receive a TPC command at a new timing.
  • a PUSCH or SRS is transmitted by applying transmission power of a UE based on a TPC command received through subframe # 5 of an ordering serving cell, which is 7 subframes before.
  • a PUSCH or SRS is transmitted by applying transmission power of a UE based on a TPC command received through subframe # 6 of an ordering serving cell, which is 7 subframes before.
  • a new K PUSCH value is determined for subframe # 4 of the following serving cell.
  • the new K PUSCH value is greater than or equal to 4, since 4 DL subframes of the ordering serving cell and 6 UL subframes of the following serving cell are min (sum [total (K PUSCH) To have)]), the new K PUSCH value is determined to be 4.
  • the PUSCH or the SRS is transmitted by applying the transmission power of the UE based on the TPC command received through subframe # 0 of the ordering serving cell, which is before 4 subframes.
  • PUSCH or SRS is transmitted by applying the transmit power of the UE based on the TPC command received through subframe # 1 of the ordering serving cell, which is six subframes before, and the following serving
  • subframe # 8 of a cell a PUSCH or SRS is transmitted by applying a transmission power of a UE based on a TPC command received through subframe # 1 of an ordering serving cell that is 7 subframes before. That is, the PUSCH or the SRS is transmitted by controlling both transmission powers of the UE in subframe # 7 and subframe # 8 of the following serving cell through subframe # 1 of the ordering serving cell.
  • the TPC command may be transmitted using subframe # 0 and the UL index of the ordering serving cell, but min (sum [ In order to determine the K PUSCH value to have a total (K PUSCH )]), the new K PUSCH value is determined as "6".
  • the K PUSCH value for the subframe # 8 of the following serving cell has a value of "7", but when the UL index is set to "0" using the UL index, the following serving cell
  • the TPC command for subframe # 7 of the UL index is set to "1”
  • the TPC command may be distinguished as being a TPC command for subframe # 8 of the following serving cell.
  • TPC commands for a plurality of DL subframes may be transmitted in subframes other than the subframe # 1 of the ordering serving cell, a new K PUSCH is determined as shown in FIG. 25 because the total sum of K PUSCH values should be minimized.
  • Table 30 below determines the TPC command reception timing (K PUSCH ) when the ordering serving cell is TDD configuration 0.
  • Table 31 shows an optimal reception power reception timing when the ordering serving cell uses TDD configuration 1.
  • Table 32 below shows an optimal reception power reception timing when the ordering serving cell uses TDD setting 2.
  • Table 33 below shows an optimal reception power reception timing when the ordering serving cell uses TDD configuration 3.
  • Table 34 below shows an optimal reception power reception timing when the ordering serving cell uses the TDD setting 4.
  • Table 35 below shows an optimal reception power reception timing when the ordering serving cell uses the TDD setting 5.
  • Table 36 below shows an optimal reception power reception timing when the ordering serving cell uses TDD setting 6.
  • TPC command information of a following serving cell is transmitted only in subframe # 0, subframe # 1, subframe # 5, and subframe # 6 of the ordering serving cell. Timing can be determined. Since subframe # 0, subframe # 1, subframe # 5, and subframe # 6 are DL subframes that can transmit PDCCH in common in all TDD configurations, it is possible to create and apply only one K PUSCH table in this case. . In this case, unlike the previous embodiment, a process of comparing the number of subframes is unnecessary.
  • the following table shows an example of scheduling TPC command reception timing so that the UE controls transmission power by transmitting a TPC command only in subframe # 0, subframe # 1, subframe # 5, and subframe # 6 of the ordering serving cell. will be.
  • TPC commands may be received through 4 DL subframes.
  • the UL of the following serving cell is determined. The number of subframes is five or more. Therefore, TPC commands cannot be matched one-to-one through only four DL subframes of the ordering serving cell, and TPCs for UL subframes of a plurality of following serving cells through at least one DL subframe of the ordering serving cell. You must receive the command. Therefore, the UL index is used to receive the TPC command through the ordering serving cell. In this case, the UL index may be 1 bit and may be included in the DCI format in the PDCCH.
  • the following serving cell is TDD configuration 0, it is transmitted as it is at the timing of transmitting the TPC command of the conventional TDD configuration 0.
  • a 2-bit UL index may be used.
  • cross-carrier scheduling is enabled through RRC signaling and one bit is added to the DCI format of the PDCCH that transmits a TPC command for TDD configuration 6 of the following serving cell. Can be decoded to the specified length.
  • At least one UL index may be used. If the UL index is set to "0", K PUSCH may be "6", and if the UL index is set to "1", K PUSCH may be "7". The terminal or the base station may know in advance about the UL index. If the UL index is used, all TPC commands for subframe # 7 and subframe # 8 of the following serving cell may be received in subframe # 1 of the ordering serving cell.
  • the K PUSCH value is determined so as not to schedule two or more UL subframe TPCs in one DL subframe at one timing.
  • the value of the TPC command is minimized, i.e., to have a min (sum [total (K PUSCH )]) determined the K PUSCH
  • the TPC command reception timing for the following serving cell according to K PUSCH values of Table 27 is not a DL subframe of the ordering serving cell, the TPC command is not transmitted from the ordering serving cell to the following serving cell for one UE. If at least one DL subframe exists, the timing at which the TPC command should be transmitted for the following serving cell according to Table 27 among the DL subframes that do not transmit the TPC command, but the timing configured as the UL subframe in the ordering serving cell
  • the K PUSCH value may be determined to transmit a TPC command instead in an adjacent DL subframe at.
  • the ordering serving cell is TDD configuration 1 and the following serving cell is TDD configuration 3.
  • subframe # 2 of the following serving cell transmits a PUSCH by controlling a transmit power of the UE based on a TPC command transmitted through subframe # 8 of the ordering serving cell.
  • the subframe # 3 of the following serving cell transmits a PUSCH whose transmission power is controlled based on the TPC command transmitted through the subframe # 9 of the ordering serving cell, and the subframe # 4 of the following serving cell represents an ordering serving.
  • the PUSCH with the controlled transmit power is transmitted based on the TPC command transmitted through the subframe # 0 of the cell.
  • subframe # 8 of the ordering serving cell is a UL subframe rather than a DL subframe (or an S subframe), a TPC command cannot be transmitted.
  • a new K PUSCH value is determined to receive a TPC command in one of the DL subframes that do not transmit the TPC command for the following serving cell among the DL subframes of the serving cell.
  • the new K PUSCH is determined from a value of 4 or more, but determined as the minimum value.
  • the transmission power of the UE is controlled based on the TPC command received in subframe # 6 of the ordering subframe to transmit the PUSCH through subframe # 2 of the following serving cell.
  • the TPC command is transmitted to the terminal through the DCI format 1A / 1B / 1D / 1 / 2A / 2 / 2B / 2C / 3 / 3A in the PDCCH to the following serving cell. This is applied when a PUCCH transmission power is applied based on the TPC command.
  • the TPC command reception timing is based on the TPC command received based on the TPC command received in subframe #ik m that is before the k mth subframe when the UE transmits the PUCCH in subframe #i.
  • a subframe of an ordering serving cell that transmits a TPC command related to control of uplink transmission power for the following serving cell to the terminal is a DL subframe and is defined based on the TDD configuration of the ordering serving cell.
  • the location of the UL subframe of the following serving cell to which the UE applies uplink transmission power is determined based on the TDD configuration of the following serving cell. Therefore, since it is based on different TDD settings, it is required to determine the k m value so that the timing is not broken.
  • Table 38 below shows the TPC command reception timing (k m ).
  • the associated downlink subframe means a subframe carrying a PDCCH including a TPC command.
  • M is the number of downlink subframes associated with the i-th subframe.
  • the k m values of Table 28 are underlined for UL subframes that cannot receive TPC commands through DL subframes subframe # 0, subframe # 1, subframe # 5, and subframe # 6. Distinguished. That is, the PUCCH may be transmitted in the UL subframe according to the remaining k m except for the underlined k m value.
  • subframe # 0 subframe # 1
  • subframe # 5 subframe # 6
  • FIG. 27 is a flowchart illustrating another example of a method of determining a TPC command reception timing k m according to the present invention.
  • a UL subframe capable of transmitting transmit power from the DL subframe of the ordering serving cell to the PUCCH of the following serving cell since the DL subframe timing of the ordering serving cell does not include the DL subframe timing of the following serving cell, a UL subframe capable of transmitting transmit power from the DL subframe of the ordering serving cell to the PUCCH of the following serving cell. Applicable only if the TPC command for the frame cannot be received (underlined in Table 38 above). However, in determining the PUCCH transmission power, an M value, which is the number of DL subframes associated with subframe #i, is also applied according to the table of k m values (hereinafter, Tables 39 to 43) according to the present invention.
  • a new K m value is determined such that the sum of the K m values is minimum for one TDD setting, that is, a min (sum [total (K m )]) value (S2710).
  • the 1-bit UL index may be scheduled for the UL subframe in which the TPC command cannot be received ( S2715).
  • the 1 bit UL index may be transmitted in addition to the DCI format 1A / 1B / 1D / 1 / 2A / 2 / 2B / 2C / 3 / 3A. This is the case when the ordering serving cell is TDD configuration 0 and the following serving cell is TDD configuration 6.
  • the ordering serving cell is TDD configuration 0 and the following serving cell is TDD configuration 6, cross-carrier scheduling is enabled through RRC signaling, and the length of the DCI format for transmitting the TPC command can be decoded to an additional length of 1 bit. Can be. If the UL index 1 bit is set to "1", it may be determined as information for scheduling UL subframe # 4 of the following serving cell. Or a 1-bit UL index, if set to "1", can be seen that K m has a value of "7".
  • a new k m value is determined such that the sum of k m values is minimum for one TDD setting, that is, min (sum [total (k m )]) value (S2710).
  • an embodiment of an optimal TPC command reception timing (k m ) determined according to the present invention for the case of TDD setting 0 to TDD setting 6 of an ordering serving cell is set for each TDD of the following serving cell. Not represented.
  • Table 39 below determines the TPC command reception timing (k m ) when the ordering serving cell is TDD configuration 0. Table 39 may also be used when applying a table of one k m value to all TDD settings.
  • Table 40 below determines the TPC command reception timing (k m ) when the ordering serving cell is TDD configuration 1.
  • Table 41 below determines the TPC command reception timing (k m ) when the ordering serving cell is TDD setting 2, 4, or 5.
  • Table 42 below determines the TPC command reception timing (k m ) when the ordering serving cell is TDD configuration 3.
  • Table 43 below determines the TPC command reception timing (k m ) when the ordering serving cell is TDD configuration 6.
  • the timing of receiving TPC commands of the PUSCH and the SRS according to the present invention (Tables 30 to 37) may also be applied to the timing of reporting aperiodic CSI.
  • the downlink transmission method is adaptively determined according to the downlink channel situation. This is because the determination of the downlink transmission method can be optimized when the downlink channel condition is made. Since the downlink transmission method is determined by the base station, the base station needs to first recognize the downlink channel condition.
  • the channel state information (CSI) of the downlink is represented by a channel quality indicator (CQI) and a precoding matrix indicator (PMI) or a rank indicator (RI), and the terminal uplinks the information on the downlink channel situation to the base station. By transmitting through the link, the base station can know the channel status of the downlink.
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RI rank indicator
  • CSI allows for periodic reporting or aperiodic reporting. Periodic reporting is reported according to a period determined by higher layer signaling, and aperiodic reporting is transmitted when a CSI request field is set through PDCCH information transmitted from a base station. do.
  • the present invention relates to a method for determining aperiodic CSI reporting timing so that aperiodic CSI reporting can be properly performed when cross carrier scheduling is applied.
  • the CSI request field is transmitted through a UL DCI format 0/4 or a random access response grant (RAR grant).
  • RAR grant random access response grant
  • Aperiodic CSI report is transmitted through the PUSCH.
  • FIG. 28 shows an example of allocating a common search space for transmitting an RAR grant to which a following serving cell is applied.
  • the CSS for the following serving cell is set.
  • the RAR grant for the following serving cell can be transmitted through the ordering serving cell.
  • the CSS resource for the ordering serving cell and the CSS resource for the following serving cell may be set not to overlap each other.
  • CSS of the ordering serving cell and CSS of the following serving cell cannot overlap each other. In this case, when the CSS of the following serving cell cannot be set or only resources other than the CSS of the ordering serving cell are defined.
  • a new RA-RNTI is generated as in the following equation.
  • the new RA-RNTI is hereinafter referred to as M-RA-RNTI (Multiple-RA-RNTI).
  • t id is an index of the first subframe of the specialized Physical Random Access Channel (PRACH) (0 ⁇ t id ⁇ 10).
  • f id is an index of the specified PRACH of the ascending order of the frequency domain in the subframe. (0 ⁇ f id ⁇ 6).
  • 29 is a flowchart illustrating aperiodic CSI reporting timing in accordance with the present invention.
  • aperiodic CSI report timing determination is a method of determining the reception timing of an optimized TPC command of an ordering serving cell for the following serving cell described with reference to FIGS. 23 and 26. The same applies to the method.
  • aperiodic CSI reporting timing of UL subframe #n (see Table 44) of the CSI transfer request information of the DL sub-frame #i K PUSCH one sub-frame before the sub-frame as the #iK PUSCH, K PUSCH more sub The difference is that the subframe # i + K PUSCH after the frame.
  • the k value is the same as the K PUSCH value, but the TPC command reception timing is configured based on the UL subframe, whereas the aperiodic CSI reporting timing is configured based on the DL subframe. Therefore, when configuring the aperiodic CSI reporting timing (k) table in Tables 30 to 37, the K PUSCH is applied to the k value in the # i-K PUSCH subframe (which becomes #i in the aperiodic CSI reporting timing table).
  • the UE determines the aperiodic CSI reporting timing based on the TDD settings of the ordering serving cell and the following serving cell (S2900). The UE may know in advance information about each TDD configuration of the ordering serving cell and the following serving cell, and the base station may separately transmit the UE to the UE before determining the aperiodic CSI reporting timing.
  • the aperiodic CSI report timing k is 4 in an FDD system. Aperiodic CSI reporting is performed after four subframes from the subframe receiving the CSI request field.
  • the aperiodic CSI reporting timing k is shown in Table 44 below.
  • the aperiodic CSI reporting timing is shown in the following table. Same as 44. Or, if the MSB of the 2-bit UL index is set to "0" and the LSB is set to "1”, the aperiodic CSI reporting timing is 7. Alternatively, if the MSB and LSB of the 2-bit UL index are set to "1", the aperiodic CSI reporting timing is shown in Table 44 below.
  • the terminal After determining the k value that is the aperiodic CSI reporting timing in advance, the terminal receives the CSI request field from the base station (S2905).
  • the aperiodic CSI request field may be included in the UL DCI format 0/4 or the RAR grant and transmitted to the terminal.
  • K PUSCH is 6 in subframe # 2 of TDD configuration 0 of Table 27, a TPC command for PUSCH is received in subframe # 6, which is six subframes before. Applying this to aperiodic CSI, in Table 44, the k value of subframe # 6 of TDD configuration 0 is 6, and PUSCH is transmitted to perform aperiodic CSI reporting in subframe # 2 after 6 subframes.
  • the non-periodic CSI report of the subframe after 6ms in the following serving cell Transmits a PUSCH on an available UL subframe.
  • one bit of the delay field is set to "1" it transmits on the next UL subframe among UL subframes capable of aperiodic CSI reporting.
  • the CSI request field is set to 1 bit, if the CSI request field is set to '1', it may indicate that the base station requests the aperiodic CSI report to the terminal.
  • the indication indicated by the CSI request field is shown in Table 45 below.
  • Aperiodic CSI reporting is triggered for serving cell c 10
  • Aperiodic CSI reporting is triggered for the first set of serving cells configured by higher layer 11
  • Aperiodic CSI reporting is triggered for the second set of serving cells configured by higher layer
  • the 1 st set and the 2 nd set refer to respective subframe patterns when there are two subframe patterns for measuring CSI for one serving cell.
  • aperiodic CSI reporting is performed on the determined subframes after the k subframes.
  • the subframe of the ordering serving cell receiving the CSI request field is a DL subframe and is defined based on the TDD configuration of the ordering serving cell.
  • the subframe in which the UE performs the aperiodic CSI report is an UL subframe and the location of the UL subframe is determined based on the TDD configuration of the following serving cell. Therefore, since it is based on different TDD settings, it is required to determine the aperiodic CSI reporting timing (k) value so that the subframe of the following serving cell to perform aperiodic CSI reporting does not become a DL subframe.
  • the aperiodic CSI reporting timing may be adjusted (or delayed) to another subframe using an UL delay field.
  • the aperiodic CSI reporting timing is (UL to send CSI after receiving CSI request).
  • Time to subframe) is equal to k 1 .
  • k 1 means the time (timing) until the CSI is transmitted after receiving the aperiodic CSI transmission request through the RAR grant.
  • the UE If the PDCCH in subframe #i is detected with the associated RA-RNTI and the corresponding DL-SCH transport block includes a response to the transmitted preamble sequence, the UE according to the information of the response UL-SCH transport block Is transmitted in the first subframe # i + k 1 , where k 1 is greater than or equal to 6, and if the UL delay field is set to “0”, subframe # i + k 1 is used for PUSCH transmission. It is the first UL subframe capable of aperiodic CSI reporting. If the UL delay field is set to '1', the PUSCH transmission is deferred to the UL subframe capable of the aperiodic CSI report immediately following the subframe # i + k 1 .
  • FIG. 30 is a block diagram illustrating a base station and a terminal for transmitting control information according to an embodiment of the present invention.
  • the terminal 3000 includes a terminal receiver 3005, a terminal processor 3010, and a terminal transmitter 3020.
  • the terminal receiver 3005 may receive a PDCCH or PHICH from the base station 3050.
  • the PDCCH may include PUSCH timing information configured by the base station in the configuration method as illustrated in FIGS. 9 to 14.
  • the PDCCH may be received from the first serving cell and the PHICH from the second serving cell.
  • the processor 3010 may configure HARQ timing information in the same manner as in FIGS. 9 to 14.
  • HARQ timing information may be configured based on the PDCCH or the PHICH.
  • the terminal transmitter 3020 transmits a PUSCH to the base station 3050 based on the HARQ timing information.
  • the base station 3050 includes a base station transmitter 3055, a base station receiver 3060, and a base station processor 3070.
  • the base station transmitter 3055 transmits the PDCCH or PHICH to the terminal 3000.
  • the PUSCH timing information applied to the terminal may be transmitted together.
  • the base station receiver 3060 may receive a PUSCH from the terminal 3000 and simultaneously receive HARQ timing information of the corresponding PUSCH.
  • the base station processor 3070 may configure the PUSCH timing information by using the method described with reference to FIGS. 9 to 14.
  • the PUSCH timing information may be transmitted from the base station transmitter 3055 to the terminal 3000 together with the PDCCH or PHICH.
  • the terminal receiver 3005 may receive a PDCCH or PHICH from the base station 3050.
  • the UL HARQ timing information may be configured by the configuration method as shown in FIGS. 16 to 17, and the terminal may include such UL HARQ timing information in advance.
  • the processor 3010 may configure HARQ timing information.
  • HARQ timing information may be configured in the same manner as in FIGS. 16 to 17.
  • the terminal transmitter 3020 transmits a PUSCH to the base station 3050 based on the HARQ timing information.
  • the base station transmitter 3055 transmits the PDCCH or PHICH to the terminal 3000.
  • UL HARQ timing information applied to the terminal may be transmitted together.
  • the base station receiver 3060 may receive a PUSCH from the terminal 3000 and simultaneously receive UL HARQ timing information for the corresponding PUSCH.
  • the base station processor 3070 may configure UL HARQ timing information using the method described with reference to FIGS. 16 to 17.
  • the UL HARQ timing information may be transmitted from the base station transmitter 3055 to the terminal 3000 by transmitting ABS or fake subframe pattern related information along with the PDCCH or PHICH.
  • the terminal receiver 3005 receives a TDD up / down configuration message as shown in Tables 26 to 45 from the base station 3050, and the terminal processor 3010. To pass).
  • the terminal receiver 3005 receives the PDCCH on each serving cell.
  • from the base station 3050 receives a DCI format or RSR grant including a CSI request field.
  • the terminal receiver 3005 may receive a plurality of transport blocks over at least one downlink subframe.
  • the terminal processor 3010 applies a TDD configuration specific to each serving cell or a band specific to the serving cell configured in the terminal 3000 according to the TDD configuration.
  • TDD configuration 0 may be applied to the primary serving cell
  • TDD configuration 1 may be applied to the secondary serving cell.
  • the terminal processor 3010 is a primary serving cell in which uplink transmission or downlink transmission is performed according to a first uplink / downlink configuration, and secondary serving in which uplink transmission or downlink transmission is performed according to a second uplink / downlink configuration.
  • the cell may be configured in the terminal 3000.
  • the terminal processor 3010 applies the transmission power of the terminal based on the TPC command included in the PDCCH received by the terminal receiver 3005.
  • the transmission power may be applied by receiving the TPC command.
  • the DCI format of the PDCCH may further include an UL index.
  • the terminal processor 3010 may determine in advance the aperiodic CSI report timing for performing the aperiodic CSI report from the received CSI request field. At this time, it may be determined based on the TDD setting for each serving cell.
  • the terminal transmitter 3020 transmits a PUSCH, SRS or PUCCH to the base station 3050 through the following serving cell based on the controlled transmission power.
  • the terminal transmitter 3020 may transmit a PUSCH for performing the aperiodic CSI report to the base station 3050.
  • the base station 3050 includes a base station transmitter 3055, a base station receiver 3060, and a base station processor 3070.
  • the base station transmitter 3055 may configure a TDD configuration message as shown in Table 27 or Table 56 and transmit the same to the terminal 3000.
  • the base station transmitter 3055 transmits the PDCCH including the TPC command to the terminal 3000 through the ordering serving cell based on the TDD setting of each serving cell.
  • the DCI format of the PDCCH may further include an UL index.
  • the base station transmitter 3055 may transmit a DCI format or RAR grant to the terminal 3000 including a CSI request field for requesting an aperiodic CSI report.
  • the base station receiver 3060 receives a PUSCH, an SRS, or a PUCCH from the terminal 3000 based on the controlled transmission power. In addition, the base station receiver 3060 receives a PUSCH including an aperiodic CSI report from the terminal 3000.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de transmission d'informations de commande de liaison descendante dans un système de communication sans fil. L'appareil objet de la présente invention reçoit d'une station de base et par l'intermédiaire d'une première cellule de desserte un canal de commande physique de liaison descendante auquel est mappée une allocation de liaison montante ; reçoit de la station de base par l'intermédiaire d'une seconde cellule de desserte un canal physique indicateur de demande automatique de répétition hybride (PHICH) ; transmet une demande HARQ de liaison montante à la station de base par l'intermédiaire d'un canal physique partagé de liaison montante (PUSCH) sur la base de l'allocation de liaison montante. Si la configuration de liaison montante/liaison descendante TDD de la première cellule de desserte et la configuration de liaison montante/liaison descendante TDD de la seconde cellule de desserte ne sont pas identiques, la temporisation de réception du canal PHICH est définie comme étant l'emplacement correspondant à une sous-trame de la première cellule de desserte, et le total de la temporisation de réception du canal PHICH et d'une temporisation de transmission du canal PUSCH est fixé à une valeur minimum.
PCT/KR2012/005318 2011-07-05 2012-07-05 Procédé et appareil de transmission d'informations de commande de liaison descendante dans un système de duplexage par répartition dans le temps Ceased WO2013005991A2 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR2020110011496A KR20130005037A (ko) 2011-07-05 2011-07-05 이중화 제어를 위한 ａｔｃａ 시스템
KR10-2011-0066627 2011-07-05
KR1020110066627A KR20130005192A (ko) 2011-07-05 2011-07-05 Ｔｄｄ 시스템의 ｕｌ ｈａｒｑ 수행 방법 및 장치
KR10-2011-0066361 2011-07-05
KR10-2011-0080889 2011-08-12
KR1020110080889A KR20130018052A (ko) 2011-08-12 2011-08-12 다중 요소 반송파 시스템에서 데이터 전송 방법 및 장치

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WO2013005991A3 WO2013005991A3 (fr) 2013-03-14

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140036719A1 (en) * 2012-08-06 2014-02-06 Innovative Sonic Corporation Method and apparatus for time division duplex uplink-downlink configuration change in a wireless communication system
WO2014160780A1 (fr) * 2013-03-29 2014-10-02 Intel IP Corporation Conception de cadencement harq pour système tdd
WO2014163368A1 (fr) * 2013-04-02 2014-10-09 주식회사 케이티 Procédé permettant de transmettre et de recevoir un canal de commande en liaison descendante, et appareil destiné audit procédé
WO2015042881A1 (fr) * 2013-09-27 2015-04-02 华为技术有限公司 Procédé et appareil de commande de puissance d'émission
CN112640378A (zh) * 2018-07-06 2021-04-09 株式会社Ntt都科摩 用户终端
CN113079574A (zh) * 2014-08-15 2021-07-06 交互数字专利控股公司 时分双工的覆盖增强和长期演进系统中增强的干扰减轻和业务适配
US12022489B2 (en) * 2013-01-26 2024-06-25 Lg Electronics Inc. Method for receiving downlink control information by UE in wireless communication system, and apparatus for same

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KR100905385B1 (ko) * 2008-03-16 2009-06-30 엘지전자 주식회사 무선통신 시스템에서 제어신호의 효율적인 전송방법
JP5199223B2 (ja) * 2008-12-30 2013-05-15 創新音▲速▼股▲ふん▼有限公司 Ａｃｋ／ｎａｃｋバンドリングを改善する方法及び通信装置
KR101750371B1 (ko) * 2009-12-24 2017-07-03 삼성전자 주식회사 크로스 캐리어 스케쥴링을 지원하는 ｔｄｄ 통신시스템에서 물리채널의 송수신 타이밍을 정의하는 방법

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140036719A1 (en) * 2012-08-06 2014-02-06 Innovative Sonic Corporation Method and apparatus for time division duplex uplink-downlink configuration change in a wireless communication system
US9100935B2 (en) * 2012-08-06 2015-08-04 Innovative Sonic Corporation Method and apparatus for time division duplex uplink-downlink configuration change in a wireless communication system
US12022489B2 (en) * 2013-01-26 2024-06-25 Lg Electronics Inc. Method for receiving downlink control information by UE in wireless communication system, and apparatus for same
WO2014160780A1 (fr) * 2013-03-29 2014-10-02 Intel IP Corporation Conception de cadencement harq pour système tdd
US9331759B2 (en) 2013-03-29 2016-05-03 Intel IP Corporation HARQ timing design for a TDD system
WO2014163368A1 (fr) * 2013-04-02 2014-10-09 주식회사 케이티 Procédé permettant de transmettre et de recevoir un canal de commande en liaison descendante, et appareil destiné audit procédé
WO2015042881A1 (fr) * 2013-09-27 2015-04-02 华为技术有限公司 Procédé et appareil de commande de puissance d'émission
CN113079574A (zh) * 2014-08-15 2021-07-06 交互数字专利控股公司 时分双工的覆盖增强和长期演进系统中增强的干扰减轻和业务适配
US11924813B2 (en) 2014-08-15 2024-03-05 Interdigital Patent Holdings, Inc. Coverage for time division duplex systems
US12262358B2 (en) 2014-08-15 2025-03-25 Interdigital Patent Holdings, Inc. Coverage for time division duplex systems
CN112640378A (zh) * 2018-07-06 2021-04-09 株式会社Ntt都科摩 用户终端
CN112640378B (zh) * 2018-07-06 2024-03-12 株式会社Ntt都科摩 终端、无线通信方法、基站以及系统

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