WO2014025150A1 - Procédé de transmission d'informations de commande sur des points de transmission et point de transmission correspondant, ainsi que procédé de mappage de ressource de canal de commande en liaison montante de terminal et terminal correspondant - Google Patents

Procédé de transmission d'informations de commande sur des points de transmission et point de transmission correspondant, ainsi que procédé de mappage de ressource de canal de commande en liaison montante de terminal et terminal correspondant Download PDF

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WO2014025150A1
WO2014025150A1 PCT/KR2013/006815 KR2013006815W WO2014025150A1 WO 2014025150 A1 WO2014025150 A1 WO 2014025150A1 KR 2013006815 W KR2013006815 W KR 2013006815W WO 2014025150 A1 WO2014025150 A1 WO 2014025150A1
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Prior art keywords
control channel
resource
information
transmission
terminal
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PCT/KR2013/006815
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English (en)
Korean (ko)
Inventor
박규진
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주식회사 케이티
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Priority claimed from KR1020120132928A external-priority patent/KR20140019718A/ko
Priority claimed from KR1020120145416A external-priority patent/KR101584751B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to CN201380052383.0A priority Critical patent/CN104704758B/zh
Priority to US14/419,530 priority patent/US10396960B2/en
Publication of WO2014025150A1 publication Critical patent/WO2014025150A1/fr

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    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements

Definitions

  • the present invention relates to a method and apparatus for transmitting downlink control information through a downlink control channel introduced into a data region and transmitting uplink control information for a terminal receiving the control information.
  • the present invention relates to an uplink control channel resource mapping method and apparatus for uplink HARQ ACK / NACK feedback of a user equipment on a downlink data channel through transmitted downlink scheduling information.
  • the increase in system capacity is limited due to the resources of the conventional limited control region, thereby increasing the need for transmitting downlink control information through a downlink control channel located in the data region.
  • uplink HARQ ACK / NACK feedback of a terminal receiving downlink scheduling information through a new downlink control channel newly introduced into a data area for improving performance and capacity of a downlink control channel is provided.
  • an object of the present specification is to provide a method for transmitting control information of a transmission / reception point and a transmission / reception point, an uplink control channel resource mapping method of a terminal, and the terminal in a wireless communication system.
  • the present specification provides a method for transmitting control information of a transmission / reception point for transmitting control information for a terminal through a data region of a physical resource block pair of a subframe. Allocating at least one set of Enhanced Physical Downlink Control CHannel composed of X resource block pairs (X is a natural number less than or equal to the number of RBs of one or more full bands) of the frame; Transmitting uplink control channel resource starting offset indication information to each of the at least one downlink control channel set; And transmitting the control information to the terminal through at least one control channel element indexed for each downlink control channel set.
  • the present disclosure is directed to each of at least one set of Enhanced Physical Downlink Control Channels composed of X resource block pairs (X is a natural number less than or equal to the number of RBs of one or more full bands) of a subframe.
  • PDSCH physical downlink shared channel
  • the present specification is a transmission and reception point for transmitting control information for a UE through a data region of a physical resource block pair of a subframe, wherein X resource block pairs (X is 1) of the subframe.
  • a controller for allocating at least one Enhanced Physical Downlink Control CHannel set having a natural number less than or equal to the number of RBs of the full band; And at least one enhanced control channel element for transmitting uplink control channel resource starting offset indication information to each of the at least one downlink control channel set and indexed by the downlink control channel set.
  • Provides a transmission and reception point comprising a transmitter for transmitting the control information to the terminal through.
  • the present specification provides for each of at least one set of Enhanced Physical Downlink Control Channels composed of X resource block pairs (X is a natural number less than or equal to the number of RBs of one or more full bands) of a subframe.
  • a terminal including a control unit for mapping using the determination element.
  • a method for transmitting control information of a transmission / reception point, a transmission / reception point thereof, a method of mapping uplink control channel resources of a terminal, and the terminal transmits downlink control information through a downlink control channel and transmits the control information. It is effective in transmitting uplink control information for a receiving terminal.
  • FIG. 1 illustrates an example of a wireless communication system to which embodiments are applied.
  • FIG. 2 and 3 are flowcharts of downlink transmission and uplink transmission in the wireless communication system of FIG. 1.
  • FIG. 5 illustrates one resource block pair of a downlink subframe in the case of a normal cyclic prefix (CP) in a Long Term Evolution (LTE) or LTE-Advanced (LTE-A) system.
  • CP normal cyclic prefix
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • FIG. 6 shows examples of assigning an index to a resource element in a PRB pair.
  • FIG. 7 illustrates two types of EPDCCH transmissions: centralized EPDCCH transmission and distributed EPDCCH transmission.
  • FIG. 9 is a flowchart of a method for transmitting control information of a transmission / reception point according to an embodiment of the present invention, and a flowchart of a method of mapping a PUCCH resource of a terminal according to another embodiment.
  • 10 is a flowchart summarizing the entire process of downlink transmission of a transmission and reception point and uplink transmission of a terminal.
  • FIG. 11 is a diagram illustrating a configuration of a transmission and reception point according to another embodiment.
  • FIG. 12 is a diagram illustrating a configuration of a user terminal according to another embodiment.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a transmission / reception point.
  • a user terminal is a comprehensive concept of a terminal in wireless communication.
  • UE user equipment
  • LTE Long Term Evolution
  • HSPA High Speed Packet Access
  • MS Mobile Station
  • UT User Terminal
  • SS Global System for Mobile communications
  • a transmission / reception point generally refers to a station communicating with a user terminal, and includes a base station (BS) or a cell, a node, a node-B, an evolved node-B, and a sector. ), A site, a base transceiver system (BTS), an access point, an access point, a relay node, a remote radio head (RRH), and a radio unit (RU).
  • BS base station
  • BTS base transceiver system
  • RRH remote radio head
  • RU radio unit
  • a base station or a cell is interpreted in a comprehensive sense to indicate some areas or functions covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, an eNB or a sector (site) in LTE, and the like. It is meant to cover various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, remote radio head (RRH), and radio unit (RU) communication range.
  • BSC base station controller
  • NodeB in WCDMA
  • eNB eNodeB
  • site a sector
  • RU radio unit
  • a user terminal and a transmission / reception point are used in a generic sense as two transmission / reception entities used to implement the technology or technical idea described in the present specification, and are not limited by the terms or words specifically referred to.
  • the user terminal and the transmission and reception point is used in a comprehensive sense as two (uplink or downlink) transmission and reception subjects used to implement the technology or the technical idea described in the present invention and are not limited by the terms or words specifically referred to.
  • the uplink Uplink, UL, or uplink
  • the downlink Downlink, DL, or downlink
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • UMB Universal Mobile Broadband
  • 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
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • Uplink and downlink transmit control information through control channels such as Physical Downlink Control CHannel (PDCCH), Physical Control Format Indicator CHannel (PCFICH), Physical Hybrid ARQ Indicator CHannel (PHICH), and Physical Uplink Control CHannel (PUCCH).
  • a data channel is configured such as PDSCH (Physical Downlink Shared CHannel), PUSCH (Physical Uplink Shared CHannel) and the like to transmit data.
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself.
  • Can be. 1 illustrates an example of a wireless communication system to which embodiments are applied.
  • a wireless communication system 100 to which embodiments are applied includes a coordinated multi-point transmission / reception system (CoMP system) or cooperative system in which two or more transmission / reception points cooperate to transmit a signal. It may be a coordinated multi-antenna transmission system, a cooperative multi-cell communication system.
  • the CoMP system 100 may include at least two transmission / reception points 110 and 112 and terminals 120 and 122.
  • the transmit / receive point has a high transmission power or a low transmission power in a macro cell region, which is connected to an eNB or a macro cell (macro cell 110, hereinafter referred to as an 'eNB') and an eNB 110 by a wired or optically controlled cable. It may be at least one RRH 112 having a.
  • the eNB 110 and the RRH 112 may have the same cell ID or may have different cell IDs.
  • downlink means a communication or communication path from the transmission and reception points (110, 112) to the terminal 120, the uplink (uplink) from the terminal 120 to the transmission and reception points (110, 112) Or a communication path.
  • the transmitter may be part of the transmission / reception points 110 and 112 and the receiver may be part of the terminals 120 and 122.
  • the transmitter may be part of the terminal 120 and the receiver may be part of the transmission / reception points 110 and 112.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, and a PDSCH may be expressed in the form of transmitting and receiving a PUCCH, a PUSCH, a PDCCH, and a PDSCH.
  • FIG. 2 and 3 are flowcharts of downlink transmission and uplink transmission in the wireless communication system of FIG. 1.
  • the eNB 110 which is the first transmission / reception point, which is one of the transmission and reception points 110 and 112, may perform downlink transmissions S210 and S310 to the terminals 120 and 122.
  • the eNB 110 performs downlink control information and uplink data channels such as a physical downlink shared channel (PDSCH), which is a main physical channel for unicast transmission, and scheduling required for reception of the PDSCH.
  • PDSCH physical downlink shared channel
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission in eg, a physical uplink shared channel (PUSCH)
  • PUSCH physical uplink shared channel
  • the first terminal 120 and UE1 may perform uplink transmission (S220) to the eNB 110 which is the first transmission / reception point.
  • the second terminal 122 and the UE2 may perform uplink transmission (S320) to the RRH 112, which is the second transmission / reception point, which is one of the transmission and reception points 110 and 112.
  • the first terminal 120 may perform uplink transmission to the RRH 112 and the second terminal 122 may perform uplink transmission to the eNB 110.
  • the number of terminals may be two or more. However, in the following embodiment, the number of terminals is two, one terminal is an eNB 110, the other terminal will be described by way of example to transmit the uplink signal to the RRH (112).
  • the first terminal 120 and the second terminal 122 are uplink control channels (eg, the first transmission and reception point 110 and the second transmission and reception point 112, respectively).
  • a UE may transmit a scheduling request (SR), a HARQ (ACK) for a received downlink data channel transport block, and a report of a UE related to a downlink channel state through a PUCCH (Physical Uplink Control CHannel)
  • the uplink data may be transmitted through an uplink data channel (for example, a physical uplink shared channel (PUSCH)).
  • the first terminal 120 and the second terminal 122 are reference signals (eg, DM-RS) for demodulation of an uplink channel to the first transmission / reception point 110 and the second transmission / reception point 112, respectively. (DeModulation Reference Signal)) may be transmitted.
  • the first terminal 120 and the second terminal 122 are unified to the terminal 120 and the first transmission and reception point 110 and the second transmission and reception point 112 are unified to the transmission and reception point 110.
  • the PUCCH may support various formats as shown in Table 1 below.
  • PUCCH format 1 / 1a / 1b may be used for scheduling request (SR) and HARQ-ACK transmission.
  • PUCCH format 2 / 2a / 2b may be used for channel quality indicator (CQI) / precoding matrix indicator (PMI) / rank indication (RI) transmission.
  • PUCCH format 3 can be used for a large number of HARQ-ACK / NACK transmission.
  • Equation 1 Corresponds to the total number of single carrier frequency division multiple access (SC-FDMA) symbols used for one slot in uplink.
  • c (i) is a pseudo-random sequence
  • the initial value (c init ) is the cell ID ( )to be. Therefore, the cyclic delay of the PUCCH may be determined by the cell ID.
  • the physical resource block used for transmission of the PUCCH as shown in FIG. 4 may be defined in Equation 2 in the slot n s .
  • n PRB is a physical resource block number, Is the number of uplink resource blocks, Is the number of subcarriers in one resource block. Is a value delivered through higher layer signaling. Denotes an available resource block for PUCCH format 2 / 2a / 2b transmission in each slot. Denotes the number of cyclic delays used for PUCCH format 1 / 1a / 1b in a resource block in which PUCCH formats 1 / 1a / 1b and 2 / 2a / 2b are mixed and used; Is an integer multiple of, Is delivered through higher layer signaling. Orthogonal resources used for transmission of the PUCCH formats 1 / 1a / 1b, 2 / 2a / 2b, and 3 are respectively , And It is expressed as
  • Corresponding resource blocks are used for PUCCH format 2 / 2a / 2b transmission, and information on ) Is delivered through uplink signaling.
  • a maximum of one resource block in a resource block for PUCCH format 2 / 2a / 2b transmission is used by mixing PUCCH formats 1 / 1a / 1b and 2 / 2a / 2b, and in such resource blocks, PUCCH format 1 / 1a / 1b Is a parameter that indicates how many orthogonal resources Corresponds to The resource blocks are then used for PUCCH format 1 / 1a / 1b transmission.
  • the index of the resource block for PUCCH format 1 / 1a / 1b only is for each of two slots in one subframe. about As many Break each and increase one by one. That is, for each specific subframe to which the PUCCH is mapped, resource indexes in two resource blocks of one subframe consisting of two slots ( ) Is the total number of This means the total number of resources having orthogonality within the resource block.
  • Is the antenna index Is a parameter representing the index of the orthogonal resource with respect to all orthogonal resources used for the PUCCH format 1 / 1a / 1b
  • the mapping is determined by a control channel element (CCE) index on which an upper layer parameter (for example, an RRC parameter) and corresponding downlink scheduling information are transmitted as shown in Equations 3 and 4 below.
  • CCE control channel element
  • Equations 3 and 4 are PUCCH resources for HARQ ACK / NACK feedback in antenna port 0 and antenna port 1 respectively in a terminal supporting two antenna port transmissions in a corresponding terminal.
  • RRC signaling e.g, RRC signaling
  • resource blocks are semi-static through higher layer signaling.
  • the resource block may be determined dynamically. Accordingly, the uplink transmission resource may be classified into a semi-static configuration region 410, a dynamic configuration region 420 in which the PUCCH format 1 / 1a / 1b may be configured, and a PUSCH region 430, as shown in FIG. 4. Can be.
  • the PUCCH resource mapping method according to Equations 3 and 4 described above is HARQ ACK / NACK through PUCCH formats 1a / 1b of a UE in which one serving cell is configured in a frame structure type 1 (FDD) system.
  • PUCCH resource mapping method for transmission is applied as a function of a minimum CCE index and a higher layer parameter similarly to the aforementioned method.
  • a plurality of candidate PUCCH resource values are determined in advance through higher layer signaling, and the PUCCH to be used among the candidate PUCCH resource values through the 'TPC command for PUCCH' information region of actual downlink scheduling information.
  • An ACK / NACK Resource Indication (ARI) scheme indicating resources may be used.
  • FIG. 5 illustrates one resource block pair of a downlink subframe in the case of a normal cyclic prefix (CP) in a Long Term Evolution (LTE) or LTE-Advanced (LTE-A) system.
  • CP normal cyclic prefix
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • one resource block pair of a downlink subframe in a normal cyclic prefix may include 14 ⁇ 12 resource elements (12 ⁇ 12 in an extended CP).
  • the resource element (RE) may consist of one OFDM symbol on the time axis and one subcarrier on the frequency axis.
  • PCFICH physical control format information channel
  • PHICH physical hybrid ARQ indicator channel
  • PDCCH physical downlink control channel
  • PDSCH Physical Downlink Shared CHannel
  • FIG. 5 four OFDM symbols are allocated to the control region 510, but it is possible to allocate one to four OFDM symbols for the control region 510.
  • the size information of the OFDM symbol of the control region 510 may be transmitted through the PCFICH.
  • a reference signal may be mapped to a specific resource element of the downlink. That is, the common reference signal or cell-specific reference signal (CRS) 530, the demodulation reference signal or the UE-specific reference signal (DeModulation Reference Signal or UE-specific Reference Signal) in the downlink DM-RSs 532 and 534 and a Channel Status Information Reference Signal (CSI-RS) may be transmitted.
  • CRS cell-specific reference signal
  • CSI-RS Channel Status Information Reference Signal
  • the CRS 530 located in the control region 510 may be used for channel estimation for decoding the PDCCH, and the CRS 530 located in the data region 520 may be used for downlink channel measurement.
  • Channel estimation for data decoding of the data region 520 may be performed using the DM-RSs 532 and 534.
  • the resources of the control area 510 reduce the resources of the data area 520 used for data transmission as overhead of the system. Meanwhile, in the LTE-A system capable of transmitting data to more users, the increase in system capacity may be limited due to the resources of the conventional limited control area 510. Therefore, an increase in control channel resources is inevitable, so a control channel transmission / reception method for multiple users using a spatial division multiplexing technique in the data region 520 may be considered. This method transmits and receives a control channel in the data area 520.
  • the control channel transmitted in the data region 520 may be called EPDCCH (Extended PDCCH or Enhanced PDCCH), but is not limited thereto.
  • control channel resources may be allocated in units of resource blocks (or resource block pairs) for compatibility with data channel (eg, PDSCH) resources. Since the decoding reference signal (DM-RS) can be used to transmit the control channel in the data region 520, the control channel can be transmitted using a beam forming technique.
  • DM-RS decoding reference signal
  • allocating control information is used in the same sense as allocating a control channel.
  • the allocation of the control channel in the present specification means allocating control information to resource elements.
  • the EPDCCH may be transmitted through some PRBs of a plurality of EPDCCH sets configured of a group of X PRBs (a group of X PRBs), where X is a natural number less than or equal to the number of PRBs of one or more full bands.
  • the EPDCCH set may be a localized type and also a distributed type.
  • Each EPDCCH set may be configured for a centralized EPDCCH or a distributed EPDCCH. That is, each EPDCCH set cannot be configured by mixing a centralized EPDCCH or a distributed EPDCCH.
  • K 1 EPDCCHs
  • the PDCCH is composed of 9-72 REGs according to a Downlink Control Information (DCI) format, which is reception control information of the UE, and an aggregation level for increasing reliability of the PDCCH.
  • DCI Downlink Control Information
  • the PDCCH has a CCE (control channel element) composed of nine REGs as a basic unit.
  • an EREG may be formed by grouping a plurality of resource elements (REs) in the data area, and an ECCE composed of the plurality of EREGs may be formed.
  • REs resource elements
  • ECCE ECCE composed of the plurality of EREGs
  • Control information allocated to the data area may be allocated such ECCE as a basic unit.
  • the EPDCCH may be assigned ECCE as a basic unit.
  • the EREGs may be grouped according to the characteristics of the indexes assigned to each resource element (RE) of the PRB.
  • FIG. 6 shows examples of assigning an index to a resource element in a PRB pair.
  • index 16 numbers in an RB pair are repeated with frequency priority to give an index.
  • each resource element is sequentially indexed from 0 according to frequency, and when the indexing in one symbol region is completed, the index is continuously indexed to the next resource region adjacent to or closest to the last indexed region.
  • Index can be assigned to all resource elements by assigning. In this case, indexes from 0 to 15 are assigned to each resource element, and after 15 times, indexes are sequentially assigned from 0 again.
  • Resource elements having the same index for the index of these resource elements may be grouped into one EREG.
  • the EREG is composed of resource elements having the same index, 16 EREGs exist in one resource block pair.
  • One ECCE may be configured by combining four or eight EREGs as described above.
  • ECCEs to which EPDCCH is allocated in the centralized EPDCCH transmission exist in one resource block pair, and ECCEs to which EPDCCH is allocated in distributed EPDCCH transmission may exist in two or more resource block pairs.
  • FIG. 7 shows two types of EPDCCH transmissions: localized EPDCCH transmission and distributed EPDCCH transmission.
  • N PRB be the number of downlink physical resource blocks (PRBs) constituting a system band supported by an arbitrary cell configured by a carrier.
  • PRBs physical resource blocks
  • the EPDCCH transmitted through the corresponding PDSCH region may have two types of EPDCCH transmission types: centralized EPDCCH transmission and distributed EPDCCH transmission. Accordingly, the number of resource elements (REs) constituting the ECCE structure and one ECCE may vary according to each EPDCCH transmission type, but may also be the same regardless of the EPDCCH transmission type.
  • REs resource elements
  • the centralized EPDCCH transmission shown in FIG. 7A means that one ECCE is located in one resource block pair and transmitted.
  • distributed EPDCCH transmission shown in FIG. 7B means that one ECCE is transmitted in at least two resource block pairs.
  • ECCE corresponds to a certain number of Enhanced Resource Element Groups (ERREGs). Each EREG means a specific number of resource elements (REs) available. In conclusion, ECCE means a set of available resource elements for EPDCCH transmission.
  • the number of ECCEs required for a specific EPDCCH depends on the size of the control information (DCI payload) and the channel coding rate. In this case, the number of ECCEs required for a specific EPDCCH is called an aggregation level (AL).
  • AL aggregation level
  • the number of REs constituting ECCE for centralized EPDCCH transmission may be referred to as N ECCE, L
  • the number of REs constituting ECCE for distributed EPDCCH transmission may be referred to as N ECCE, D.
  • the maximum number of REs that can be used for EPDCCH transmission in one PRB or VRB (Virtual Resource Block) is N RB
  • RE the number of ECCEs that can be transmitted through the corresponding PRB (or VRB) is concentrated.
  • in case of distributed EPDCCH transmission there are [N RB, RE / N ECCE, D ].
  • the maximum number of ECCEs that can be transmitted through the corresponding PRB is determined according to the aforementioned EPDCCH transmission type. [N RB, RE / N ECCE, L ] and [N RB, RE / N ECCE, D ].
  • uplink HARQ ACK / NACK feedback of a UE receiving downlink scheduling information through an EPDCCH newly introduced into a data region (PDSCH region) for improving performance and capacity of a downlink control channel It is necessary to define a PUCCH resource mapping method.
  • the present invention provides a PUCCH resource mapping method for uplink HARQ ACK / NACK feedback of a terminal receiving downlink scheduling information through an newly introduced EPDCCH.
  • the present invention defines an implicitly determined part and an explicitly determined part for determining PUCCH resource mapping for a terminal receiving downlink control information (DCI) through EPDCCH.
  • DCI downlink control information
  • an ECCE indexing method for the EPDCCH is provided.
  • Each PUCCH resource mapping includes an implicitly determined parameter determined by ECCE, (Equation 3 and 4 Explicitly determined parameter, (Equation 3 and 4 ) And an implicitly determined offset, offset i may be included as a component of PUCCH resource determination.
  • Resource mapping is determined by Equations 5 and 6, respectively.
  • the present invention is an uplink HARQ ACK / NACK resource mapping method for a UE configured to receive downlink scheduling information for PDSCH transmission through an EPDCCH.
  • a first method of determining a value corresponding to the UE-specific RRC parameter for the aforementioned legacy PDCCH UE is Can be reused and applied.
  • the above-described explicit determination parameter in case of a UE configured to receive DCI through EPDCCH, the above-described explicit determination parameter, Can be set independently for each terminal through terminal-specific higher layer signaling.
  • the transmission and reception point when the transmission and reception point is configured to receive the DCI through the EPDCCH for any terminal, an explicit determination parameter for the terminal, Value, and the terminal applies the PUCCH resource mapping according to Equations 5 and 6 described above.
  • a parameter to be applied when HARQ ACK / NACCK feedback PUCCH resource mapping among the aforementioned n parameters may be indicated.
  • an existing information area (information field) of downlink scheduling information for the terminal may be used for indication of a corresponding ACK / NACK resource.
  • the value of the 'TPC command for PUCCH' information area is 2 bits and the value is '10'. to Is applied.
  • An ACK / NACK resource indication may be made for.
  • Implicit determination parameter which is one of the following components of PUCCH resource determination, Will be described in detail.
  • FIG. 6 illustrates two EPDCCH transmission types: localized EPDCCH transmission and distributed EPDCCH transmission.
  • N PRB be the number of downlink physical resource blocks (PRBs) constituting a system band supported by an arbitrary cell configured by a carrier.
  • PRBs physical resource blocks
  • the EPDCCH transmitted through the corresponding PDSCH region may have two types of EPDCCH transmission types: centralized EPDCCH transmission and distributed EPDCCH transmission. Accordingly, the number of resource elements (REs) constituting the ECCE structure and one ECCE may vary according to each EPDCCH transmission type, but may also be the same regardless of the EPDCCH transmission type.
  • REs resource elements
  • the centralized EPDCCH transmission shown in FIG. 6A means that one ECCE is located in one resource block pair and transmitted.
  • distributed EPDCCH transmission shown in FIG. 6B means that one ECCE is located in at least two resource block pairs and transmitted.
  • Any terminal is a PUCCH for HARQ ACK / NACK feedback the index of the minimum PRB (or VRB) of the PRB (or VRB) used for transmission of the EPDCCH for the terminal in the centralized or distributed EPDCCH set configured for the terminal Of resource mapping expressions It can be used as a value. That is, PRBs of a centralized or distributed EPDCCH set composed of X resource block pairs (X is a natural number less than or equal to the number of RBs of one or more full bands) of a subframe allocated for an arbitrary UE are sequentially set from 0 to 0 ⁇ .
  • the n PRB May be used for PUCCH resource mapping for PUCCH ACK / NACK feedback.
  • n PRB * [N RB, EREG / N REG, D ] n PRB * N ECCE, D may correspond, i.e., the number of ECCEs set through one PRB of any centralized EPDCCH set, N ECCE, L And when the number of ECCEs, N ECCE, D set through one PRB of any distributed EPDCCH set is applied, Equations 5 and 6 for PUCCH resource mapping for uplink HARQ ACK / NACK feedback of the UE
  • n PRB * N ECCE, L may be corresponded when the EPDCCH is centralized EPDCCH transmission
  • n PRB * N ECCE, D may be corresponded when the EPDCCH is distributed EPDCCH transmission.
  • the minimum index of the PRB for transmitting control information of the X PRBs (VRBs) constituting the EPDCCH is used as one resource determination element when mapping the PUCCH resource of the ACK / NACK to the PDSCH allocated according to the downlink scheduling information.
  • the product of the minimum index of the PRB and the number of ECCEs that may be set through each of the PRBs may be used as one resource determination element when mapping PUCCH resources of ACK / NACK to the allocated PDSCH according to downlink scheduling information.
  • the EPDCCH set may be a centralized EPDCCH set or a distributed EPDCCH set.
  • Equations 5 and 6 for PUCCH resource mapping for uplink HARQ ACK / NACK feedback of a corresponding UE as a function of the number of blind decoding The value can be determined. For example, when the corresponding downlink scheduling information is received through N-th blind decoding of the UE, You can apply N as the value.
  • An EPDCCH transmission type dependent blind decoding method may be defined as an EPDCCH blind decoding procedure of a corresponding UE.
  • both the distributed EPDCCH search space and the centralized EPDCCH search space are configured for a terminal on which an EPDCCH is set, perform the blind decoding for the distributed EPDCCH search space first, and then perform the blind decoding for the centralized EPDCCH search space. can do.
  • the UE performs blind decoding on the distributed EPDCCH search space in the order of ECCE aggregation level 1, 2, 4, 8, etc., and then moves to the centralized EPDCCH discovery space, and then moves to ECCE aggregation level 1, 2, 4, 8 And perform the blind decoding in the order of.
  • it may be defined to perform blind decoding in a centralized EPDCCH search space first manner.
  • an aggregation level dependent blind decoding method may be defined.
  • the blind decoding is performed in the order of ECCE aggregation level 1, 2, 4, 8, and so on. That is, when both the distributed EPDCCH search space and the centralized EPDCCH search space are set in a certain terminal, after performing the blind decoding on the aggregation level 1 of the distributed EPDCCH search space in the order of low aggregation level to high aggregation level, It may be defined to perform the blind decoding for the aggregation level 1 of the EPDCCH transmission type, and then perform the blind decoding in the distributed EPDCCH search space first manner in the same way for the aggregation levels 2, 4, and 8 thereafter. It may be defined to perform in a high aggregation level priority manner in the reverse order.
  • the order of the corresponding blind decoding is applied to only the downlink scheduling information at once, and the order of the fallback downlink scheduling information of DCI format 1A, which is the fallback downlink scheduling information, is assigned according to the above-described rule.
  • the PDSCH transmission mode may be sequentially numbered for the DCI format.
  • ECCE indexing is performed for each UE in a UE-specific search space and the minimum ECCE in which downlink scheduling information is transmitted. Index above Can be applied as a value.
  • ECCE indexing for this is a function of the number of blind decoding
  • An index may be defined for each search space according to the EPDCCH transmission type by a method similar to the above-described embodiment in which a value is determined. That is, M EPBs (M is a natural number less than or equal to the number of full-band PRBs) are allocated as distributed EPDCCH search spaces as an EPDCCH search space for an arbitrary terminal, and L (L is 1 or more).
  • the centralized EPDCCH search space the number n ECCE, D values and the L values of ECCE generated for distributed EPDCCH search space area for each M value Accordingly, the concentrated EPDCCH search space n ECCE, L value is determined. Accordingly, as the ECCE indexing method of the UE, indexing is performed from 0 to (n ECCE, D -1) for ECCEs of the distributed EPDCCH search space, and then n ECCE for ECCEs constituting the centralized EPDCCH search space.
  • ECCE indexes can be defined in the order of , D ⁇ (n ECCE, D + n ECCE, L -1).
  • ECCE indexing may be separately performed on the distributed EPDCCH search space and the centralized EPDCCH search space.
  • ECCE, D Define an ECCE index up to 1), followed by 0 for the ECCEs that make up the centralized EPDCCH search space to (n ECCE, L -ECCE index can be defined in the order of 1).
  • a plurality of EPDCCH sets configured by a group of X PRBs (X is a natural number less than or equal to the number of PRBs of one or more full bands) for each EPDCCH transmission type for an arbitrary UE or for any EPDCCH transmission type
  • X is a natural number less than or equal to the number of PRBs of one or more full bands
  • EPDCCH or ECCE indexing may be separately performed for each EPDCCH set.
  • any of the terminal is set to receive DCI through EPDCCH (e.g. to claim EPDCCH set # 1 ⁇ EPDCCH set #K L constituting the convergent EPDCCH search space for one UE (UE1)
  • K L of EPDCCH A set may be allocated, and K D EPDCCH sets may be allocated from EPDCCH set # 1 to EPDCCH set #K D constituting a distributed EPDCCH search space, in which case, each of the centralized type EPDCCH set #n may be allocated.
  • the ECCEs of the centralized EPDCCH set are indexed by ECCE # 0 to 7. At this time, since the centralized EPDCCH set, one ECCE is located in one PRB pair. For example, all of the ECCE # 0, for example, all of the EREGs constituting the ECCE are located in the same PRB #n.
  • ECCE # 0 to 7 It indexes with ECCE # 0 to 7 for ECCEs constituting one distributed EPDCCH set.
  • one ECCE is located in two PRB pairs. For example, one half of ECCE # 0, ECCE (1/2) # 0, for example, half of the EREGs constituting ECCE are located in PRB #m and the other half ECCE (2/2) # 0, for example ECCE. The other half of the constituent EREGs is located in PRB # m + N.
  • the order of ECCE indexing in one centralized EPDCCH set is indexed sequentially from the ECCE located at the minimum frequency position according to the frequency position constituting each ECCE, or configures the corresponding EPDCCH set.
  • one distributed EPDCCH set may be indexed in the same order as that of the aforementioned concentrated EPDCCH set.
  • ECCE indexing is performed for each UE in a UE-specific search space and the minimum ECCE in which downlink scheduling information is transmitted. Index above Can be applied as a value.
  • ECCE indexing according to the resource block (s) allocated for transmission of EPDCCH for the UE and the EPDCCH transmission type in the resource block (s). Can be done.
  • L max [as described in an embodiment of determining the implicit decision parameter described above. N RB, EREG / N ECCE, L ].
  • k consecutive PRBs are allocated from PRB (or VRB) #n to PRB (or VRB) # (n + k-1) for centralized EPDCCH transmission for an arbitrary UE.
  • the centralized ECCE index of the PRB (or VRB) is in order from the minimum ECCE. Index can be assigned.
  • the number of distributed ECCEs defined through corresponding PRBs is determined.
  • the distributed ECCE index of the PRB (or VRB) is in order from the minimum ECCE. Index can be assigned.
  • the various methods of determining the implicit decision parameters described above are differently applied according to the type (intensive or distributed) of the EPDCCH set may be included in the scope of the present invention.
  • each of the minimum indexes and PRBs of the PRB is used as an implicit decision parameter of the PUCCH transmission resource mapping equation for HARQ ACK / NACK feedback of the corresponding UE.
  • the product of the number of ECCEs that can be set through may be used.
  • an HARQ ACK / NACK PUCCH resource mapping function for any UE configured to receive a DCI through an EPDCCH is an implicit decision offset value in addition to the implicit decision parameter and the explicit decision parameter.
  • the offset i value can be introduced.
  • the corresponding value is the DM RS antenna port number of the low ECCE, aggregation level, C-RNTI of the corresponding UE, and the corresponding downlink scheduling information for the corresponding UE is transmitted. It can be determined as a function value that takes as a parameter a subset of parameters such as the system band of the cell, N PRB, and the like.
  • a hashing function for determining a UE-specific search space of a UE for each aggregation level of an existing legacy PDCCH located in a control region may be reused.
  • Yk is a variable according to the aggregation level of the common search space or the UE-specific search space, and m 'is determined by the number of PDCCH candidates and the carrier indicator field value, and L means the aggregation level (AL). And i is 0,... , L-1.
  • the offset value may vary depending on whether the common search space for the corresponding UE is set in the legacy PDCCH region located in the control region or in the EPDCCH region. For example, when the common search space (CSS) of the legacy PDCCH is reused, 16, which is the number of CCEs constituting the legacy PDCCH, may be added to an offset value.
  • SCS common search space
  • Implicitly determined parameter which is a component of PUCCH resource determination when mapping PUCCH resources by corresponding antenna port for HARQ ACK / NACK feedback, , Explicitly determined parameter, And various embodiments of implicitly determined offset, offset i, respectively.
  • Resource mapping method may be included in the device.
  • an implicit decision parameter which is one of a component of PUCCH resource determination.
  • ECCE indexing may be performed separately for each EPDCCH set, and a minimum ECCE index including downlink scheduling information may be applied.
  • the function for PUCCH resource mapping is an implicitly determined parameter determined by ECCE in a manner similar to the above Equations (3) and (4).
  • Equation (3) and (4) And explicit determined parameters (Equation (3) and (4) It can be expressed as an expression including a modification parameter for). That is, the PUCCH resource for each antenna port is determined by Equations 7 and 8, respectively.
  • an implicitly determined offset additional parameter And explicitly determined offset It may be further included to determine the function for PUCCH resource mapping, as shown in equations (9) and (10) below.
  • each parameter ( , , , Look at the embodiments of the).
  • the explicit information may be transmitted through higher layer signaling (explicitly determined, higher layer configured parameter, ).
  • Equation 3 to 4 The value corresponding to ( Is a UE-specific parameter set by higher layer signaling, and may serve as an offset for PUCCH format 1 / 1a / 1b resource allocation to determine a starting point of a dynamically allocated PUCCH region). Can act as an offset to determine where the PUCCH region begins, in this sense May be referred to as a PUCCH resource starting offset indication value,
  • the higher layer signaling including the value may be referred to as resource starting offset indication information.
  • a cell-specific higher layer is allocated from a base station for the uplink HARQ ACK / NACK resource mapping.
  • Radio Resource Control (RRC) parameters transmitted through cell-specific higher layer signaling The value was equally applied to all terminals in the cell.
  • the above-described information included in the system information received from the base station is the same as the terminal receiving the DCI through the legacy legacy PDCCH.
  • a value may be used to map PUCCH resource for uplink HARQ ACK / NACK transmission.
  • a case of a terminal configured to receive a DCI through the EPDCCH Can be set independently for each terminal through terminal-specific higher layer signaling.
  • For PDSCH transmission based on downlink scheduling information transmitted through values and centralized EPDCCH sets Values can be assigned separately. That is, two for any terminal And And the PUCCH resource mapping equations of Equations 7 to 10 for PDSCH allocation through the distributed EPDCCH set and PDSCH allocation through the centralized EPDCCH set for the corresponding UE, respectively. and Can be applied.
  • one or more resource block pairs (a group of X PRBs, X is 1) for each EPDCCH transmission type (distributed or centralized) or for any EPDCCH transmission type for any UE configured to receive DCI through EPDCCH.
  • a separate UE-specific higher layer signaling parameter for each EPDCCH set Can be assigned.
  • any of the terminals are configured to receive the DCI through EPDCCH (EPDCCH set to # 1 ⁇ EPDCCH set #K L constituting the convergent EPDCCH search space (localized EPDCCH search space) for eg UE1)
  • EPDCCH EPDCCH set to # 1 ⁇ EPDCCH set #K L constituting the convergent EPDCCH search space (localized EPDCCH search space) for eg UE1)
  • K L EPDCCH sets may be allocated
  • K D EPDCCH sets may be allocated from EPDCCH set # 1 to EPDCCH set #K D constituting a distributed EPDCCH search space.
  • m 1,..., K L
  • the UE corresponds to an EPDCCH set in which downlink scheduling information in which a corresponding PDSCH resource is allocated is transmitted for PUCCH resource mapping for uplink HARQ ACK / NACK feedback for PDSCH transmission. You can let the values apply.
  • Equations 7 to 10 Look at the embodiment of. May be implicitly determined parameter, ).
  • N PRB will be referred to as the number of downlink resource block pair PRB (Physical Resource Block) constituting the system bandwidth (bandwidth) supported by any cell configured by the carrier.
  • PRB Physical Resource Block
  • two types of EPDCCH transmission types may exist in the EPDCCH transmitted through the corresponding PDSCH region, that is, a localized EPDCCH transmission and a distributed EPDCCH transmission. Accordingly, the number of resource elements (REs) constituting an ECCE structure and one ECCE may vary according to each EPDCCH transmission type.
  • REs resource elements
  • the number of REs constituting the ECCE for the centralized EPDCCH type is referred to as N ECCE, L
  • the number of REs constituting the ECCE for the distributed EPDCCH type is referred to as N ECCE, D.
  • N ECCE the number of REs constituting the ECCE for the distributed EPDCCH type
  • the maximum number of REs that can be used to transmit EPDCCH to one PRB or VRB (Virtual Resource Block) is N RB
  • RE the number of ECCEs that can be transmitted through the corresponding PRB (or VRB) is concentrated.
  • For the type EPDCCH type there are [N RB, RE / N ECCE, L ]
  • the distributed type EPDCCH type there are [N RB, RE / N ECCE, D ].
  • the maximum number of ECCEs that can be transmitted through the PRB is determined according to the EPDCCH transmission type. [N RB, RE / N ECCE, L ] and [N RB, RE / N ECCE, D ].
  • n PRB as the lowest PRB (or VRB) index among PRBs (or VRBs) used for EPDCCH transmission for a corresponding terminal
  • an uplink HARQ ACK / NACK feedback of the corresponding terminal is determined.
  • PUCCH resource mapping As the value, if the EPDCCH the centralized EPDCCH transmission, n PRB * corresponding to [N RB, RE / N ECCE, L], and if the EPDCCH is distributed EPDCCH transmission, n PRB * [N RB, RE / N ECCE, D ].
  • the value can be determined. For example, when the corresponding downlink scheduling information is received through the Nth blind decoding of the UE, You can let N be the value.
  • An EPDCCH transmission type dependent blind decoding scheme according to an EPDCCH transmission type may be defined as an EPDCCH blind decoding procedure of a corresponding UE.
  • both the distributed EPDCCH search space and the centralized EPDCCH search space are configured for a certain terminal (UE set as EPDCCH)
  • blind decoding is performed on the distributed EPDCCH search space first, and then blind on the centralized EPDCCH search space.
  • the UE performs blind decoding on the distributed EPDCCH search space in the order of ECCE aggregation level 1, 2, 4, and 8, and then moves to the centralized EPDCCH search space and moves to ECCE aggregation level 1. And blind decoding in the order of 2, 4, and 8. Alternatively, it may be defined to perform blind decoding in a manner that proceeds the centralized EPDCCH search space first.
  • an aggregation level dependent blind decoding method may be defined.
  • blind decoding is performed in the order of ECCE aggregation level 1, 2, 4, and 8. That is, when both the distributed EPDCCH search space and the centralized EPDCCH search space are set in a certain terminal, after performing blind decoding on the aggregation level 1 of the distributed EPDCCH search space in the order of low aggregation level to high aggregation level, It may be defined to perform blind decoding on aggregation level 1 of the EPDCCH transmission type, and then to perform blind decoding on aggregation levels 2, 4, and 8 afterwards.
  • the blind decoding may be defined by performing a high aggregation level first in the reverse order.
  • the blind decoding order is applied to only the downlink scheduling information at a time, and the above rule is applied to DCI format 1A, which is a fallback DL scheduling grant, among the downlink scheduling information.
  • the numbers may be numbered accordingly, and may be sequentially numbered for a PDSCH transmission mode dependent DCI format according to the PDSCH transmission mode.
  • ECCE indexing is performed for each UE in a UE-specific search space, and the lowest ECCE index of the control channel element in which downlink scheduling information is transmitted. Above Can be applied as a value. ECCE indexing for this can define the index for each search space according to the EPDCCH transmission type. That is, M pairs of resource blocks and PRB (s) are allocated as distributed EPDCCH search spaces as EPDCCH search spaces for an arbitrary UE, and L PRBs are each configured as centralized EPDCCH search spaces.
  • the number n ECCE, D values of ECCEs generated in the distributed EPDCCH search space according to the value, and the number n ECCE , L values of the ECCEs generated in the centralized EPDCCH search space are determined according to the L value.
  • the 0 to about the ECCE for distributed EPDCCH search space as the ECCE indexing scheme for the terminal according to (n ECCE, D - 1) and then indexing through, then n ECCE for the ECCE constituting the convergent EPDCCH search space ECCE indexes can be defined in the order of , D ⁇ (n ECCE, D + n ECCE, L -1).
  • ECCE indexing may be separately performed in the distributed EPDCCH search space and the centralized EPDCCH search space.
  • ECCE, D Define an ECCE index up to 1), followed by 0 for the ECCEs that make up the centralized EPDCCH search space to (n ECCE, L -ECCE index can be defined in the order of 1).
  • ECCE indexing is performed for each UE in a UE-specific search space and the lowest ECCE index of the control channel element in which downlink scheduling information is transmitted is described above. Can be applied as a value.
  • ECCE is determined according to the resource block (s) allocated for transmission of the EPDCCH for the UE and the EPDCCH transmission type in the resource block. You can do indexing.
  • L max [N RB, RE / N ECCE, L ]. .
  • k consecutive PRBs are allocated from PRB (or VRB) #n to PRB (or VRB) # (n + k-1) for centralized EPDCCH transmission for an arbitrary UE.
  • the centralized ECCE index of the PRB (or VRB) is in order from the lowest ECCE. Index can be assigned.
  • the distributed ECCE index of the PRB may be assigned an index from 0 to (KECCE, D-1) in order from the lowest ECCE.
  • the lowest PRB (or VRB) index among PRBs (or VRBs) used for EPDCCH transmission for the UE is applied.
  • the value of implicitly determined offset Values can be introduced. like this When is introduced, the corresponding value is a DM RS (Demodulation Reference Signal) antenna port number of the minimum ECCE in which downlink scheduling information for the UE is transmitted, an aggregation port, and a C- of the UE. It may be determined as a function value having a subset of parameters such as a cell radio network temporary identifier (RNTI), a system bandwidth of the corresponding cell, the number of resource block pairs (N PRB ), and the like.
  • RNTI cell radio network temporary identifier
  • N PRB number of resource block pairs
  • a hashing function for determining a UE-specific search space of a UE for each aggregation level of an existing legacy PDCCH may be reused.
  • a hashing function for determining a search space of the terminal according to an aggregation level In N subband k the total number of control channel elements (total number of CCEs) of the PDCCH can be applied by replacing only N CCE, K values with N PRB .
  • Equation 5 may be applied.
  • a value may be defined and applied to the terminal according to the ARI value in the downlink scheduling information.
  • an information field for ARI configuration may be newly defined in DCI formats (ie, DCI formats 1A, 2A, 2B, 2C, etc.) for downlink scheduling information, or an existing information area may be defined as a corresponding ARI (ACK / It can be used for the purpose of NACK Resource Indication.
  • the existing 2-bit 'TPC command for PUCCH' information area can be used for ARI use.
  • the value is determined semi-static through higher layer signaling.
  • the value may be referred to as a dynamic offset indication value in the sense that the value can be indicated through control information transmitted to the terminal.
  • UE-specific higher layer signaling (UE-specific higher layer signaling) for any terminal configured to receive the DCI over the EPDCCH , ... ,
  • UE-specific higher layer signaling UE-specific higher layer signaling
  • Up to n explicit decision parameters can be configured to be UE-specific. For example, when a 2-bit ARI is applied, three offset values except four, which are four or default offset values, are set for each terminal through UE-specific higher layer signaling as shown in Table 4 or Table 5 below. Different terminal according to ARI This can be applied.
  • the offset value according to the ARI may be fixed to apply the same value to all terminals.
  • a set applied to link adaptation as a scheme for efficiently allocating PUCCH resources while minimizing collision between the terminal receiving the DCI through the EPDCCH and the terminal receiving the DCI through the legacy PDCCH.
  • the remaining values (3,5,6,7) except the aggregation level may be used as offset values according to the corresponding ARI. That is, as shown in Table 6 below, 3,5,6,7 is applied as an offset value according to ARI, or aggregation level that does not use three offset values except the default offset value as shown in Table 7 below. ) 3,5,6,7, except for even number 6, (3,5,7) can be applied to each.
  • the ACK / NACK Resource offset field corresponds to the above-described ARI field. Is Same value as
  • the offset value according to the ARI may be fixed, and the offset mapping table according to the ARI may be differently taken according to the aggregation level of the EPDCCH in which the corresponding downlink scheduling information is transmitted. That is, ARI-for aggregation level 1 Mapping Table, ARI for Set Level 2- Mapping Table, ARI for Set Level 4- ARI for mapping table and aggregation level 8- Each mapping table is defined and determined according to the aggregation level of the EPDCCH for the corresponding downlink scheduling information and the ARI of the corresponding downlink scheduling information. You can let the values apply. For example, see Tables 9 to 12 below for each set level of ARI ⁇ Each mapping table may be defined.
  • 9A illustrates a method of transmitting control information of a transmission / reception point for transmitting control information for a specific terminal through a data region of a physical resource block pair of a specific subframe according to an embodiment of the present invention. It is a flow chart.
  • an embodiment of the present invention in terms of a transmission / reception point controls a transmission / reception point for transmitting control information for a terminal through a data region of a physical resource block pair of a subframe.
  • a set of at least one Enhanced Physical Downlink Control Channel (EPDCCH) configured of X resource block pairs (X is a natural number less than or equal to the number of RBs of one or more full bands) of a subframe Allocating (S810) and transmitting uplink control channel resource starting offset indication information to each of the at least one downlink control channel set (S815).
  • EPDCCH Enhanced Physical Downlink Control Channel
  • the control information transmitted from the transmission / reception point to the terminal may include downlink scheduling information, and the control information may include at least one control of one downlink control channel set of the at least one downlink control channel set (EPDCCH set). It may be transmitted to the terminal through an enhanced control channel element (ECCE).
  • ECE enhanced control channel element
  • the minimum index of the control channel element in which the control information is transmitted and the PUCCH resource starting offset indication information transmitted in step S815 are resources for mapping the PUCCH resource of ACK / NACK for the PDSCH (Physical Downlink Shared Channel) allocated according to the downlink scheduling information. Can be used as a determinant.
  • the resource starting offset indication information transmitted in step S815 may be transmitted through higher layer signaling.
  • the higher layer signaling may be RRC (Radio Resource Control) as an example.
  • the dynamic offset indication information When the dynamic offset indication information is transmitted through the downlink scheduling information, the dynamic offset indication information may be used as another resource determination element when mapping PUCCH resources of ACK / NACK to the PDSCH allocated according to the downlink scheduling information.
  • the PUCCH resource mapping is , , And It can be determined by four resource decision factors.
  • FIG. 9B is a flowchart of a PUCCH resource mapping method of a terminal receiving downlink scheduling information through an EPDCCH according to another embodiment.
  • another embodiment is a PUCCH resource mapping method 900 of a terminal, and includes at least one resource block pair (X is a natural number greater than 1) of a subframe.
  • resource starting offset indication information may be received through higher layer signaling (eg, RRC).
  • the eNB 110 performs downlink transmission (S1010) as a transmission / reception point, the eNB 110 is configured through higher layer signaling before downlink transmission (S1010) is performed. Information about the parameters may be transmitted to the first terminal 120.
  • the eNB 110 indexes at least two enhanced control channel elements per set.
  • ECCEs constituting the centralized EPDCCH set may be indexed separately for at least one centralized EPDCCH set composed of two physical resource block pairs.
  • the ECCEs are indexed for each EPDCCH set as described above with reference to FIG. 8.
  • control information may be assigned to at least one of the indexed control channel elements, for example, ECCE # 4 and 5, and the control information may be transmitted to a specific terminal.
  • the control information includes the downlink scheduling information
  • the PDSCH indicated by the downlink scheduling information is also transmitted downlink to the first terminal 120 in step S1010.
  • step S1010 the first terminal 120 receives control information including downlink scheduling information and a PDSCH indicated by the downlink scheduling information from the eNB 110 through the EPDCCH.
  • the first terminal 120 transmits a scheduling request (SR) through a PUCCH, a HARQ (ACK) for the received downlink data channel transport block, and a report of a UE related to a downlink channel state.
  • uplink data may be uplinked through a PUSCH.
  • the terminal 120 may perform uplink transmission to the eNB 110, which is the first transmission / reception point.
  • the second terminal 122 may perform uplink transmission to the RRH 112 which is the second transmission / reception point.
  • the ACK / NACK Resource Indicator (ARI) information field is defined in the downlink scheduling information, so that the first terminal 120 may receive the dynamic offset indication information through this field.
  • the first terminal 120 may check the dynamic offset value through the ARI information field.
  • the first terminal 120 transmits HARQ ACK for reception of a corresponding PDSCH of a terminal through which PDSCH allocation information for the corresponding terminal is transmitted through downlink scheduling information through an EPDCCH allocated to a data region of a resource block.
  • Implicitly determined parameter determined by ECCE as a component of PUCCH resource determination when mapping PUCCH resources by corresponding antenna port for / NACK feedback, (Equation 3 and 4 Explicitly determined parameter, (Equation 3 and 4 Implicitly determined offset And explicitly determined offset It may include.
  • the PUCCH resource mapping for each antenna port for HARQ ACK / NACK feedback for the PDSCH reception may be determined by Equations 7 to 10, respectively.
  • ECCE # 4 may be used as one element to map PUCCH resources.
  • PUCCH resource m 2.
  • a transmission / reception point 1100 includes a controller 1110, a transmitter 1120, and a receiver 1130.
  • the transmitter 1120 and the receiver 1130 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention.
  • the transmitter 1120 transmits the above-described control information to a specific terminal through an EPDCCH of a data region of a resource block pair of a specific subframe.
  • the base station 1100 performs one of the embodiments of the present invention.
  • the implementation of the embodiments will be further described.
  • the controller 1110 may allocate at least one set of an enhanced physical downlink control channel composed of X resource block pairs (X is 1 or more and a natural number less than or equal to the number of full-band PRBs) of the subframe. (Wherein X may be one of 2, 4, 8, 16).
  • the uplink control channel resource starting offset indication information is represented by Equations 7 to 10, 8 to 10, and Described through the examples Information about.
  • the transmitter 1120 transmits control information to the terminal through the data region of the resource block pair of the subframe.
  • the control information may include downlink scheduling information, and the control information may be described in the description of the controller 1110. It is transmitted through at least one enhanced control channel element (ECCE) of one downlink control channel set of at least one downlink control channel set (EPDCCH set) mentioned.
  • ECCE enhanced control channel element
  • ACK / NACK for the PDSCH Physical Downlink Shared Channel allocated according to the downlink scheduling information for the minimum index of the uplink control channel resource starting offset indication information transmitted by the transmitter 1120 and the control channel element through which the control information is transmitted. It may be used as a resource determining element in the uplink control channel resource mapping of.
  • the downlink scheduling information transmitted by the transmitter 1120 may include dynamic offset indication information.
  • the transmitter 1120 may define an ARI field in the downlink scheduling information and transmit dynamic offset indication information through this field.
  • the transmitted dynamic offset indication information may be used as another resource determination element when uplink control channel resource mapping of ACK / NACK for PDSCH (Physical Downlink Shared Channel) allocated according to downlink scheduling information.
  • the receiver 1210 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • the receiver 1210 is configured to index at least one downlink control channel set for at least one enhanced physical downlink control channel set consisting of X resource block pairs (X is a natural number greater than 1) of a subframe.
  • control unit 1220 controls the overall operation of the base station according to the PUCCH resource mapping method for the uplink HARQ ACK / NACK feedback for the terminal configured to receive the DCI through the EPDCCH required to perform the above-described present invention.
  • the controller 1220 uses the minimum index of the control channel element as one element to map the PUCCH resources when mapping the PUCCH resources of the ACK / NACK for the physical downlink shared channel (PDSCH) allocated according to the downlink scheduling information.
  • PDSCH physical downlink shared channel
  • the transmitter 1230 transmits downlink control information, data, and a message to a base station through a corresponding channel.
  • the terminal 1200 described with reference to FIG. 12 is provided through the receiver 1210, the controller 1220, and the transmitter 1230.
  • Example, Example, Examples and All of the functions of the terminal in the embodiment of the present invention described by the embodiment can be performed.
  • the receiver 1210 uplinks each of at least one set of enhanced physical downlink control channels including X resource block pairs (X is 1 or more and a natural number less than the number of full-band PRBs) of a subframe.
  • ECCE control channel element
  • X 2, 4, 8, (16), and (32) in X resource block pairs that constitute one EPDCCH set, but are not limited thereto.
  • the EPDCCH set may or may not be configured with a maximum of 16 resource block pairs according to the type of the EPDCCH set.
  • a distributed EPDCCH set may consist of 16 resource block pairs, but a centralized EPDCCH set may consist of up to 8 resource block pairs.
  • the uplink control channel resource starting offset indication information is represented by Equations 7 to 10, 8 to 10, and Described through the examples Information about.
  • the receiver 1210 may receive such uplink control channel resource starting offset indication information through higher layer signaling (eg, RRC).
  • RRC higher layer signaling
  • the control unit 1220 controls uplink control channel resource mapping of ACK / NACK with respect to the Physical Downlink Shared Channel (PDSCH) allocated according to the downlink scheduling control information, and the control unit 1220 controls uplink received during resource mapping.
  • the uplink control channel resource may be mapped using the minimum index of the control channel element in which the channel resource starting offset indication information and the control information are received as the resource determination element.
  • the downlink scheduling control information may include dynamic offset indication information.
  • the control unit 1220 may use the dynamic offset indication information as another resource determination element to map the uplink control channel resource.
  • Such dynamic offset indication information is represented by Equations 9 to 10, FIG. Described through the examples Information about.

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

Abstract

La présente invention porte sur un procédé et un appareil de transmission d'informations de commande en liaison montante pour un terminal qui transmet des informations de commande en liaison descendante par l'intermédiaire d'un canal de commande en liaison descendante qui est introduit dans un domaine de données et reçoit les informations de commande, et plus particulièrement, sur un procédé et un appareil de mappage d'une ressource de canal de commande en liaison montante destinée à renvoyer par rétroaction en liaison montante HARQ ACK/NACK du terminal pour un canal de données en liaison descendante par l'intermédiaire d'informations de planification en liaison descendante, qui sont transmises par l'intermédiaire du canal de commande en liaison descendante.
PCT/KR2013/006815 2012-08-06 2013-07-30 Procédé de transmission d'informations de commande sur des points de transmission et point de transmission correspondant, ainsi que procédé de mappage de ressource de canal de commande en liaison montante de terminal et terminal correspondant WO2014025150A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380052383.0A CN104704758B (zh) 2012-08-06 2013-07-30 传输接收点的控制信息传输方法
US14/419,530 US10396960B2 (en) 2012-08-06 2013-07-30 Method for transmitting control information on transmission points and corresponding transmission point, as well as method for mapping uplink control channel resource of terminal and corresponding terminal

Applications Claiming Priority (16)

Application Number Priority Date Filing Date Title
KR10-2012-0085937 2012-08-06
KR20120085937 2012-08-06
KR10-2012-0089253 2012-08-16
KR20120089253 2012-08-16
KR20120089881 2012-08-17
KR10-2012-0089881 2012-08-17
KR20120093098 2012-08-24
KR10-2012-0093098 2012-08-24
KR10-2012-0093109 2012-08-24
KR20120093109 2012-08-24
KR10-2012-0132928 2012-11-22
KR1020120132928A KR20140019718A (ko) 2012-08-06 2012-11-22 송수신포인트의 제어정보 전송방법 및 그 송수신포인트, 단말의 상향링크 컨트롤 채널 자원 매핑방법, 그 단말
KR1020120145416A KR101584751B1 (ko) 2012-08-16 2012-12-13 송수신 포인트의 상향링크 제어채널 자원 설정 방법, 그 송수신 포인트, 단말의 상향링크 제어채널 자원 매핑방법 및 그 단말
KR10-2012-0145416 2012-12-13
KR1020120146706A KR101556749B1 (ko) 2012-08-06 2012-12-14 송수신포인트의 제어정보 전송방법 및 그 송수신포인트, 단말의 상향링크 컨트롤 채널 자원 매핑방법, 그 단말
KR10-2012-0146706 2012-12-14

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CN112272079A (zh) * 2017-01-05 2021-01-26 Oppo广东移动通信有限公司 传输上行控制信道的方法、网络设备和终端设备
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