WO2014042356A1 - Procédé de transmission d'informations de commande de point d'émission-réception et ledit point d'émission-réception, procédé de réception d'informations de commande pour un terminal et ledit terminal - Google Patents

Procédé de transmission d'informations de commande de point d'émission-réception et ledit point d'émission-réception, procédé de réception d'informations de commande pour un terminal et ledit terminal Download PDF

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Publication number
WO2014042356A1
WO2014042356A1 PCT/KR2013/006816 KR2013006816W WO2014042356A1 WO 2014042356 A1 WO2014042356 A1 WO 2014042356A1 KR 2013006816 W KR2013006816 W KR 2013006816W WO 2014042356 A1 WO2014042356 A1 WO 2014042356A1
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Prior art keywords
control channel
resource
ereg
resource block
ecce
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PCT/KR2013/006816
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English (en)
Korean (ko)
Inventor
박규진
최우진
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주식회사 케이티
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Priority claimed from KR1020120144531A external-priority patent/KR101574713B1/ko
Priority claimed from KR1020120145368A external-priority patent/KR101562694B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to CN201380059609.XA priority Critical patent/CN104798330B/zh
Priority to US14/428,234 priority patent/US9385850B2/en
Publication of WO2014042356A1 publication Critical patent/WO2014042356A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a method for transmitting control information of a transmission / reception point for a terminal for receiving downlink control information through a downlink control channel introduced into a data region, a method for receiving control information of a terminal, and apparatuses thereof.
  • 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.
  • the present invention provides an Enhanced Control Channel Element (ECCE) / Enhanced Resource Element Group (EREG) mapping method for downlink control channel transmission in the data domain.
  • ECCE Enhanced Control Channel Element
  • EREG Enhanced Resource Element Group
  • the present invention also provides a method and apparatus for indexing ECCE in an arbitrary Enhanced Physical Downlink Control Channel (EPDCCH) set and a distributed EPDCCH set.
  • EPDCCH Enhanced Physical Downlink Control Channel
  • the present invention is a method for transmitting control information of a transmission / reception point for transmitting control information to a terminal through data regions of resource block pairs (Physical Resource Block pairs) of a subframe, at least one of resource block pairs of some of the resource block pairs.
  • the resource element groups constituting the channel element are located in one resource block pair and the resource element groups constituting the control channel element in the distributed downlink control channel set are located in two or more resource block pairs; And transmitting control information to the terminal through at least one control channel element among the control channel elements.
  • the present invention is a method for receiving control information of a terminal for receiving control information from a transmission / reception point through data regions of resource block pairs (Physical Resource Block pairs) of a subframe, and repeating 16 numbers in each of the resource block pairs with frequency priority.
  • resource block pairs Physical Resource Block pairs
  • 4 or 4 resource element groups of different indexes the remainder of which is divided by 4 of the enhanced resource groups composed of resource elements having the same index for the resource elements assigned to the index.
  • Receiving a radio signal through at least one control channel element among control channel elements allocated to eight resource element groups of the same different index, the remainder of which is divided by-for resource block pairs of some of the resource block pairs At least one localized enhanced downlink control channel set is established.
  • At least one distributed downlink control channel set is configured for resource block pairs of other portions of the resource block pairs, and configures the control channel element in the centralized downlink control channel set.
  • Resource element groups are located in one resource block pair, and the resource element groups constituting the control channel element in the distributed downlink control channel set are located in two or more resource block pairs; And obtaining the control information from the radio signal.
  • the present invention is a transmission and reception point for transmitting control information to a terminal through a data area of physical resource block pairs of a subframe, at least one localized to the resource block pairs of some of the resource block pairs Configure an enhanced physical downlink control channel set, and configure at least one distributed downlink control channel set for resource block pairs of other portions of the resource block pairs, and the resource block pairs
  • the remainder divided by 4 of the Resource Element Groups consisting of resource elements having the same index for the Resource Elements which are repeated by frequency-priority 16 numbers in each is indexed.
  • Control unit for allocating control channel elements to the resource element groups of the centralized downlink control channel set in the resource element groups constituting the control channel element is located in one resource block pair in the distributed downlink control channel set
  • Resource element groups constituting the control channel element are located in at least two resource block pairs;
  • the present invention is a terminal for receiving control information from a transmission / reception point through a data region of physical resource block pairs of a subframe, and a resource in which 16 numbers in each of the resource block pairs are repeated with frequency priority first and assigned an index.
  • Four of the Resource Element Groups of resource elements that have the same index for the Resource Elements divided by four equal the remainder divided by four or four Resource Element Groups of the same index.
  • an Enhanced Physical Downlink Control Channel is configured and the child At least one distributed downlink control channel set is configured for resource block pairs of other portions of the block pairs, and the resource element groups constituting the control channel element in the centralized downlink control channel set are one.
  • Resource element groups which are located in a resource block pair of and constitute the control channel element in the distributed downlink control channel set, are located in two or more resource block pairs; And a control unit obtaining the control information from the radio signal.
  • FIG. 1 illustrates an example of a wireless communication system to which embodiments are applied.
  • FIG. 2 illustrates one resource block pair in the case of a normal cyclic prefix (CP) as an example of a structure of a downlink resource in a Long Term Evolution (LTE) or LTE-Advanced (LTE-A) system.
  • CP normal cyclic prefix
  • EPDCCH transmissions show two types of EPDCCH transmissions: centralized EPDCCH transmission and distributed EPDCCH transmission.
  • FIG. 4 is an example of resource element (RE) mapping of a PRB paired physical resource block (PRB) indexed by a symbol reference cyclic shift with respect to one transmit antenna port (Cell-specific reference signal (CRS) port 0) It is also.
  • RE resource element
  • FIG. 5 shows an example of RE mapping of PRREG pairs EREG indexed with symbol-based cyclic shifts for two transmit antenna ports (CRS ports 0 and 1).
  • FIG. 6 shows an example of RE mapping of PRREG pairs EREG indexed with symbol reference cyclic shifts for four transmit antenna ports (CRS ports 0, 1, 2, 3).
  • FIG. 7 is an example of RE mapping of PRREG pairs that are EREG indexed without cyclic shift for one transmit antenna port (CRS port 0).
  • FIG. 8 is an example of RE mapping of PRREG pairs EREG indexed without cyclic shift for two transmit antenna ports (CRS ports 0 and 1).
  • FIG. 9 is an example of RE mapping of PRREG pairs EREG indexed without cyclic shift for four transmit antenna ports (CRS ports 0, 1, 2, 3).
  • FIG. 10 is a diagram illustrating EREG mapping of a centralized EPDCCH set according to the first and second embodiments.
  • FIG. 11 is a configuration diagram of an ECCE in a distributed EPDCCH set according to the third embodiment.
  • FIG. 12 is a configuration diagram of an ECCE in a distributed EPDCCH set according to the embodiment 4-1.
  • FIG. 13 is a configuration diagram of an ECCE in a distributed EPDCCH set according to the embodiment 4-2.
  • FIG. 14 is a configuration diagram of an ECCE in a distributed EPDCCH set according to the embodiment 4-3.
  • 15 is a flowchart illustrating a method for transmitting control information of a transmission / reception point according to an embodiment of the present invention.
  • 16 is a flowchart illustrating a method for receiving control information of a terminal according to another embodiment of the present invention.
  • 17 is a diagram showing the configuration of a transmission and reception point according to another embodiment of the present invention.
  • FIG. 18 is a diagram illustrating a configuration of a terminal according to another embodiment of the present invention.
  • 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.
  • a transmission / reception point refers to a transmission point for transmitting / transmitting a signal or a reception point for receiving a signal, and a combination of these.
  • FIG. 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 signals are transmitted and received through channels such as a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and the like, may be used.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • PDSCH physical downlink control channel
  • PDSCH is transmitted and received.
  • the eNB performs downlink transmission to the terminals.
  • the eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required to receive the PDSCH.
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • one radio frame (radioframe) consists of 10 subframes, and one subframe consists of two slots.
  • the radio frame has a length of 10 ms and the subframe has a length of 1.0 ms.
  • the basic unit of data transmission is a subframe unit, and downlink or uplink scheduling is performed on a subframe basis.
  • One slot includes seven (or normal cyclic prefix) or 6 (or extended CP) orthogonal frequency division modulation (OFDM) symbols in the time domain.
  • OFDM orthogonal frequency division modulation
  • the frequency domain may be configured by, for example, a subcarrier unit of 15 kHz interval.
  • time-frequency resources may be configured in units of resource blocks (RBs).
  • the resource block may consist of one slot on the time axis and 180 kHz (12 subcarriers) on the frequency axis.
  • One subcarrier (two slots) on the time axis A resource consisting of 12 subcarriers on the frequency axis may be referred to as a resource block pair (RBP).
  • RBP resource block pair
  • the resource element (RE) may consist of one OFDM symbol on the time axis and one subcarrier on the frequency axis.
  • One resource block pair may include 14 ⁇ 12 resource elements or 12 ⁇ 12 resource elements.
  • FIG. 2 illustrates one resource block pair in the case of a normal cyclic prefix (CP) as an example of a structure of a downlink resource in a Long Term Evolution (LTE) or LTE-Advanced (LTE-A) system.
  • CP normal cyclic prefix
  • PCFICH physical control format information channel
  • PHICH physical hybrid ARQ indicator
  • three OFDM symbols are shown in FIG. 2 for the control region 210, it is possible to assign 1 to 4 OFDM symbols for the control region 210.
  • the size information of the OFDM symbol of the control region 210 may be transmitted through the PCFICH.
  • the PDCCH may be transmitted over the entire system band, and the PDSCH may be transmitted on a resource block basis.
  • the user terminal may first check the PDCCH set for the user, and if there is no data corresponding to the user, take a micro sleep mode to reduce power consumption of the user terminal in the data area 120.
  • a reference signal may be mapped to a specific resource element of downlink. That is, the common reference signal or cell-specific reference signal (CRS) 230, the demodulation reference signal or the UE-specific reference signal (DeModulation Reference Signal or UE-specific Reference Signal) in the downlink DM-RSs 232 and 234 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 230 in the control region 210 may be used for channel estimation for decoding the PDCCH, and the CRS 230 in the data region 220 may be used for downlink channel measurement.
  • Channel estimation for data decoding of the data region 220 may be performed using the DM-RSs 232 and 234.
  • the DM-RSs 232 and 234 are multiplexed with reference signals for a plurality of layers using orthogonal codes. For example, in the case of four layer transmission, an orthogonal code having a length of 2 may be applied to two reference signal resource elements consecutive in the time axis, and two different reference signals may be multiplexed for each reference signal group. In the case of layer transmission, four orthogonal signals having a length of 4 may be applied to four reference signal resource elements distributed in the time axis, thereby multiplexing four different reference signals for each reference signal group.
  • DM-RS corresponding to each layer is transmitted by applying the same precoding applied to the layer. This enables decoding of data at the receiving end (terminal) without the information of precoding applied at the transmitting end (base station).
  • a control channel is required to efficiently use limited resources.
  • the resources of the control area 210 reduce the resources of the data area 220 used for data transmission as overhead of the system.
  • one resource block pair consists of 14 or 12 OFDM symbols, of which up to three OFDM symbols are used for the control region 210 and the remaining OFDM symbols are used for the data region 220. I use it.
  • the increase in system capacity may be limited due to the resources of the conventional limited control area 210. Therefore, an increase in control channel resources is inevitable, and thus a control channel transmission / reception method for multiple users using a spatial division multiplexing technique in the data region 220 may be considered.
  • This method is to transmit and receive a control channel in the data area 220.
  • the control channel transmitted in the data region 220 may be called EPDCCH (Extended PDCCH or Enhanced PDCCH), but is not limited thereto.
  • all UEs receive 1 ⁇ 3 OFDM symbols (system band> 10PRBs) or 2 ⁇ in front of a downlink subframe to receive a downlink DCI. It depends on the Physical Downlink Control Channel (PDCCH) transmitted on 4 OFDM symbols (system band ⁇ 10 PRBs).
  • the basic unit of PDCCH transmission for any terminal is a control channel element (CCE), and one CCE is composed of nine resource element groups (REGs).
  • REG is included in REs except for PCFICH, which is another physical channel present in the PDCCH region of the corresponding downlink subframe, and resource elements (REs) to which a PHICH and a cell-specific reference signal (CRS) are transmitted. 4 consecutive REs on the frequency axis.
  • PCFICH resource elements
  • CRS cell-specific reference signal
  • EREG Enhanced REG
  • ECCE Enhanced CCE
  • EPDCCH which is newly introduced in 3GPP LTE / LTE-A release 11 and subsequent systems, is transmitted through a PDSCH region of a downlink pilot time slot (DwPTS) of a downlink subframe or a special subframe unlike the legacy PDCCH.
  • DwPTS downlink pilot time slot
  • each M group of M PRBs M is a natural number less than or equal to the number of PRBs of one or more full bands
  • K is a natural number less than or equal to the number of PRBs of one or more full bands
  • K may be one of 2, 3, 4, and 6
  • each EPDCCH set configured for a certain UE may have a different M value.
  • one EPDCCH type of a distributed type or a localized type may be configured and signaled for each EPDCCH set.
  • the EPDCCH set may be a localized type or a distributed type.
  • FIG. 3 illustrates 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 (a) of FIG. 3 means that one ECCE is located in one resource block pair and transmitted. Meanwhile, the distributed EPDCCH transmission shown in FIG. 3B means that one ECCE is transmitted in at least two resource block pairs.
  • EREG / ECCE not only the frame structure type, subframe configuration, and cyclic prefix length, but also the legacy PDCCH control for one PRB pair constituting each EPDCCH set
  • a total of 16 EREGs are constructed from EREG # 0 to EREG # 15 in the corresponding PRB pair, regardless of the size of the region and the presence of other reference signals (for example, CRS, CSI-RS, PRS, etc.) except DM-RS. can do.
  • FIGS. 4 to 9 Examples of EREG indexing in one PRB pair constituting an arbitrary EPDCCH set in a downlink subframe corresponding to a normal CP are shown in FIGS. 4 to 9 below. However, in Figs. 4 to 9 below, parts indicated by hatching and not indicated by the numbers indicate REs used for DM-RS, and parts indicated by numbers indicating lattice or hatched and indicated by RE are transmitted by the CRS. Indicates.
  • FIG. 4 illustrates an example of RE mapping of PRREG pairs EREG indexed with a symbol reference cyclic shift with respect to one transmit antenna port (CRS port 0).
  • the EREG is indexed in a frequency-prioritized manner from 0 to 15, and indexed by the symbol-based cyclic shift to index 12 of the second symbol in the index 11 of the first symbol. .
  • index 8 of the third symbol is indexed adjacent to index 7 of the second symbol.
  • the PRB pair shown in FIG. 4 is for CRS port 0, and CRSs are mapped to eight REs as shown in FIG. 3.
  • the CRS may be mapped to another location by frequency shifts.
  • FIG. 5 shows an example of RE mapping of PRREG pairs EREG indexed with symbol-based cyclic shifts for two transmit antenna ports (CRS ports 0, 1)
  • FIG. 6 shows four transmit antenna ports (CRS ports 0, 1, An example of RE mapping of PRREG pairs EREG indexed with symbol reference cyclic shift for 2, 3).
  • FIGS. 5 and 6 are indexed with symbol-based cyclic shifts in the same manner as shown in FIG. 4, and FIG. 5 shows an additional eight in addition to the CRS shown in FIG. 4 for CRS ports 0, 1.
  • CRSs are mapped to REs, and in FIG. 6, CRSs are further mapped to eight REs in addition to the CRSs shown in FIG. 5 for CRS ports 0, 1, 2, and 3.
  • FIGS. 7 to 9 to be described below are examples of not applying a cyclic shift. .
  • FIG. 7 shows an example of RE mapping of a PRREG pair EREG indexed without cyclic shift for one transmit antenna port (CRS port 0), and FIG. 8 shows cyclic for two transmit antenna ports (CRS ports 0, 1).
  • FIG. 9 is an exemplary RE mapping example of an EREG indexed PRB pair without cyclic shift for four transmit antenna ports (CRS ports 0, 1, 2, and 3). .
  • CRSs are mapped in the same manner as the CRS mappings of FIGS. 4 to 6, respectively. However, there is a difference in the way of indexing.
  • the EREG is indexed in a frequency-priority manner with numbers from 0 to 15, and also indexed without the symbol reference cyclic shift so that index 12 of the second symbol is indexed adjacent to index 11 of the first symbol. It is being indexed away.
  • index 8 of the third symbol which is the next order of index 7 of the second symbol, is indexed without being contiguous.
  • FIGS. 4 to 9 REs having the same index are grouped into one EREG. Therefore, a total of 16 EREGs from EREG # 0 to EREG # 15 are allocated to one PRB pair. 4 to 9 illustrate examples of the PRB pair of the normal CP, but in the same manner, 16 EREGs are allocated to the PRB pair of the extended CP from EREG # 0 to EREG # 15.
  • EREG # 15 may consist of 9 REs each.
  • the number of REs that can be actually used for EPDCCH transmission for each EREG may vary according to the number of transmit antenna ports (CRS port number) and the legacy PDCCH size, as shown in the above figure.
  • EREG # 0 consists of all six available REs.
  • EREG corresponding to index # 1 there are 9 REs indexed by # 1, but 5 of EREG # 1 can be used except for the RE to which the third control region and CRS are mapped (see the upper right of FIG. 4). It will consist of an RE.
  • ECCE which is a basic unit of EPDCCH transmission, may be composed of N EREGs according to subframe type and CP length, respectively. Specifically, the N value may be determined as follows.
  • the normal subframe corresponding to the extended CP, the special subframes 1, 2, 6, 7 and 9 corresponding to the normal CP, and the special subframes 1, 2, 3, corresponding to the extended CP, N and 8 can be set for 5 and 6.
  • two ECCEs may be configured with eight EREGs for each of 16 EREGs constituting one PRB pair.
  • the EREG for each REREG is not considered without considering the legacy control region size (ie, legacy PDCCH size) and other REs used as other reference signals such as CRS and CSI-RS. Since indexing is performed, the number of REs that can be actually used for EPDCCH transmission varies depending on the size of the legacy control region and the presence of other reference signals in any downlink subframe. That is, the number of REs available for EPDCCH transmission may vary for each EREG. Therefore, in the case of ECCE which is a basic unit of actual EPDCCH transmission, there is a possibility that an imbalance occurs in the number of REs actually available for each ECCE.
  • each of the EREG # 0, EREG # 1, ..., EREG # 15 set in one PRB pair is composed of nine REs.
  • the number of REs that can be actually used for EPDCCH transmission for each EREG is determined by the number of CRS ports and the legacy PDCCH size as shown in FIGS. 4 to 9.
  • Tables 1 to 3 below show EPDCCH transmission for each EREG index in one PRB pair constituting an arbitrary EPDCCH set according to legacy PDCCH size and CRS port setting in a normal downlink subframe based on FIG. 4. This is a table showing the number of REs available.
  • Table 1 is a table listing the number of available REs for each EREG according to each CRS port configuration when the legacy PDCCH size is 1. Table 1 summarizes EREG indexing based on which cyclic shift is not applied.
  • Table 2 summarizes the number of available REs for each EREG according to each CRS port configuration when the legacy PDCCH size is 2. Table 2 summarizes EREG indexing based on which cyclic shift is not applied.
  • Table 3 is a table listing the number of available REs for each EREG according to each CRS port configuration when the legacy PDCCH size is 3. Table 3 summarizes EREG indexing based on cyclic shift.
  • the present invention provides a method of mapping EREGs constituting each ECCE.
  • the present invention provides a method of ECCE / EREG mapping in EPDCCH sets of localized type and distributed type.
  • the present invention provides a method for configuring each ECCE in M PRB pairs that constitute an EPDCCH set of a localized type and a distributed type as described above.
  • the present invention considers the legacy PDCCH and CRS transmitted through the DwPTS region of all downlink subframes and special subframes, and optimal ECCE / EREG mapping considering the number of REs that can be used for EPDCCH transmission in a corresponding PRB pair.
  • EREGs constituting one ECCE may be distributed to M PRB pairs constituting the EPDCCH set.
  • the present invention provides an ECCE / EREG mapping method in a distributed type EPDCCH set.
  • M PRB pairs constituting an arbitrary EPDCCH set are referred to herein as an Enhanced Physical Resource Block (EPRB) for distinguishing from a PRB, which is a unit of a conventional PDSCH transmission, and corresponding EPRB index # m is a sequence of PRB indexes of the PRB pairs constituting the EPDCCH set, and EPRB # 0, ..., EPRB from the PRB pair having the lowest PRB index to the PRB pair having the largest PRB index, respectively.
  • Index with # (M-1) M PRB pairs constituting an arbitrary EPDCCH set
  • Embodiment 1 provides a method of configuring N consecutive EREGs as one ECCE in one PRB pair constituting the EPDCCH set, and thus a method of indexing the ECCE.
  • EPDCCH set is a localized type in any EPDCCH set composed of M physical resource block (PRB) groups (a group of X PRBs) (X is 2, 4, 8, or 16)
  • ECCEs constituting the EPDCCH set may be configured as follows according to the first embodiment.
  • the ECCE configured according to the first embodiment may be indexed in ascending order from the lowest PRB pair (PRB pair having the smallest PRB index).
  • a 1 st ECCE composed of EREG # 0 to EREG # 3 in the lowest PRB pair becomes ECCE # 0
  • a 2 nd ECCE composed of EREG # 4 to EREG # 7 is ECCE # 1, respectively.
  • EREG # 8 ⁇ is the 3 rd ECCE consisting EREG # 11 ECCE # 2
  • EREG # 12 ⁇ EREG # 15 4 th ECCE consisting are each indexed by the ECCE # 3.
  • each of 1 st , 2 nd , 3 rd , and 4 th consisting of EREG # 0 ⁇ 3, EREG # 4 ⁇ 7, EREG # 8 ⁇ 11, and EREG # 12 ⁇ 15, respectively ECCEs are indexed into ECCE # 4, ECCE # 5, ECCE # 6, and ECCE # 7, respectively.
  • ECCE indexing of the centralized EPDCCH set and EREG mapping constituting each ECCE may be performed.
  • M PRBs constituting an arbitrary centralized EPDCCH set may be sequentially indexed from 1 st ECCEs consisting of EREG # 0, # 1, # 2, and # 3 in each PRB pair.
  • M ECCEs ranging from 1 st ECCEs consisting of EREG # 0 to EREG # 3 of the lowest PRB to ECCEs consisting of EREG # 0 to EREG # 3 of the Mth lowest PRB index (large PRB index)
  • the indexes may be indexed from ECCE # 0 to ECCE # (M-1) in order of the PRB including the corresponding ECCEs.
  • EREG # 4, # 5, # 6, # 7 like for the M 2 nd ECCE consisting of lowest PRB pairs from largest to PRB pairs from each ECCE #M in ascending ECCE # (2M-1 in each PRB pairs Indexing), and then indexing ECCE # 2M to ECCE # (3M-1) in the ascending order of PRB index for 3 rd ECCEs consisting of EREG # 8 to EREG # 11 of each PRB pair, and finally As such, the 4 th ECCEs consisting of EREG # 12 to EREG # 15 of each PRB pair may be indexed up to ECCE # 3M to ECCE # (4M-1).
  • Embodiment 2 provides a method of configuring one ECCE by taking an EREG index value of modulo 4 in one PRB pair constituting the EPDCCH set, dividing by 4, and combining the same EREG indexes.
  • each ECCE may be configured as follows.
  • n 0,1,2, ..., 15, where n is the EREG index shown in FIGS.
  • 1 st ECCE in the PRB pair in any EPDCCH set is EREG # 0, EREG # 4, EREG # 8, is composed of EREG # 12, 2 nd ECCE is EREG # 1, EREG # 5, EREG # 9, EREG is composed of # 13, 3 rd ECCE is EREG # 2, EREG # 6, EREG # 10, is composed of EREG # 14, 4 th ECCE is EREG # 3, EREG # 7, EREG # 11, composed of EREG # 15 do.
  • the available REs according to the legacy PDCCH sizes for each ECCE are calculated as follows.
  • the number of EREGs constituting each ECCE and available REs for each ECCE is configured as shown in Table 7.
  • the number of EREGs constituting each ECCE and available REs for each ECCE is configured as shown in Table 8.
  • the number of EREGs constituting each ECCE and available REs for each ECCE is configured as shown in Table 9.
  • ECCEs constituting the EPDCCH set may be configured as follows according to the second embodiment. have.
  • a 1 st ECCE including EREG # 0, # 4, # 8, and # 12 of a lowest PRB pair is 2 nd ECCE indexed with ECCE # 0, EREG # 1, # 5, # 9, # 13 indexed with ECCE # 1, 3 rd ECCE with EREG # 2, # 6, # 10, # 14 and A 4 th ECCE consisting of EREG # 3, # 7, # 11, and # 15 can be indexed into ECCE # 2 and ECCE # 3, respectively. Then, it is indexed to the respective ECCE # 4 ⁇ # 7 ECCE in the same sequence in the 2 nd lowest PRB pair. In this way, the 4 th ECCE of the PRB pair having the last Mth lowest PRB index (ECCE consisting of EREG # 3, 7, 11, and 15 of the PRB pair) is set to ECCE # (4M-1). Can be indexed.
  • ECCEs in order from 1 st ECCEs (ECCEs consisting of EREG # 0, # 4, # 8, and # 12 in each PRB pair) of each PRB pair Index # 0 to ECCE # (M-1), then index ECCE #M to ECCE # (2M-1) in the same order for the 2 nd ECCEs of each PRB pair, as well as for each PRB pair It can be indexed as ECCE # 2M to ECCE # (3M-1) for 3 rd ECCEs and ECCE # 3M to ECCE # (4M-1) for the last 4 th ECCEs of each PRB pair.
  • the same ECCE / EREG mapping method and corresponding ECCE indexing method may be applied to the centralized EPDCCH set configured in 7,9 (normal CP) and special subframes 1,2,3,5,6 (extended CP). .
  • Embodiment 1 instead of configuring four ECCEs by tying four consecutive EREGs out of 16 EREGs configuring the PRB pair for any PRB pair configuring each centralized EPDCCH set, 8
  • the two EREGs may be bundled to configure 1 st ECCE (EREG # 0 to EREG # 7) and 2 nd ECCE (EREG # 8 to EREG # 15), respectively.
  • EREG # 0 to EREG # 7 EREG # 8 to EREG # 15
  • four EREGs having the same EREG index value are obtained when modulo 4 is applied to 16 EREGs constituting the PRB pair for any PRB pair constituting any centralized EPDCCH set.
  • Each ECCE can be configured with eight EREGs having the same EREG index value when modulo 2 is taken instead of forming one ECCE each. That is, 1 st ECCE is configured with (EREG # 0, # 2, # 4, # 6, # 8, # 10, # 12, # 14) in the corresponding PRB pair, and (EREG # 1, # 3, # 5, # 7, # 9, # 11, # 13, it is possible to # 15) constituting the 2 nd to the ECCE.
  • each ECCE constituting an arbitrary distributed EPDCCH set composed of M EPRBs is It can be transmitted over N distributed EPRBs according to two conditions.
  • each ECCE is per EPRB
  • each ECCE maps N EREGs constituting the ECCE through a total of N distributed EPRBs, one EREG per one EPRB.
  • the corresponding N EPRBs out of M EPRBs constituting the EPDCCH set It consists of N EPRBs with an interval of EPRB units.
  • each ECE is composed of four EREGs by combining two EREGs and two EREGs in EPRB # 1.
  • FIG. 11A is an ECCE configuration diagram of a distributed EPDCCH set consisting of two EPRBs according to the third embodiment.
  • the distributed EPDCCH set includes two PRB pairs of EPRB # 0 and EPRB # 1, and two EREGs in EPRB # 0 according to condition 1-1).
  • EPRB # 1 two EREGs are combined to form an ECCE with four EREGs.
  • one ECCE is four EREGs for transmitting the corresponding ECCE to (one EREG in EPRB # 0, one EREG in EPRB # 2, one EREG in EPRB # 4, and one EREG in EPRB # 6).
  • 11 is a configuration diagram of an ECCE in a distributed EPDCCH set consisting of eight EPRBs according to the third embodiment.
  • the distributed EPDCCH set is composed of eight PRB pairs from EPRB # 0 to EPRB # 7, and according to the above conditions 1-2), EPRB # 0, EPRB # 2, EPRB # 4, and EPRB.
  • One EREG is assigned to # 6 to form one ECCE.
  • the ECCE may be configured with EREGs having the same index from each of the EPRBs mapped to configure one ECCE. That is, in order to configure one ECCE, in the case of 1-1), the respective EPRBs Two EREGs should be mapped, and in the case of 1-2), one EREG of each EPRB should be mapped.
  • each ECE may be configured by mapping EREGs having the same index in each EPRB.
  • the indexes of the selected EREGs in the EPRB constituting the ECCE are indexed starting from ECCE # 0, starting with the smallest ECCE, and the above 1-2.
  • indexing may be performed from the ECCE mapped to the smallest EPRB indexes. That is, the EREG constituting ECCE #i constituting the distributed EPDCCH set may be configured by Equations 1 and 2 below.
  • N ⁇ M and ECCE #i is ⁇ EREG #n (i) of EPRB #m (a) ⁇ .
  • [x] is the maximum integer not exceeding x
  • FIG. 12 is a configuration diagram of an ECCE in a distributed EPDCCH set according to the embodiment 4-1.
  • the number N of the EREGs constituting the ECCE is 4, and the index i of the ECCE is 0.
  • FIG. 12 the number N of the EREGs constituting the ECCE is 4, and the index i of the ECCE is 0.
  • ECCE # 0 becomes ⁇ EREG # 0 and EREG # 1 of EPRB # 0 and EPRB # 1 ⁇ , and EREG # 0 and EREG # 1 are selected from EPRB # 0 and EPRB # as shown in FIG. ECCE # 0 can be configured by selecting EREG # 0 and EREG # 1 from 1.
  • EPRB ECCE # 0 becomes ⁇ EREG # 0 of EPRB # 0, EPRB # 2, EPRB # 4, EPRB # 6 ⁇ , select EREG # 0 from EPRB # 0, as shown in Figure 12 (b), EPRB ECCE # 0 can be configured by selecting EREG # 0 in # 2, EREG # 0 in EPRB # 4, and EREG # 0 in EPRB # 6.
  • the ECCE may be configured with EREGs having a shifted index from the respective EPRBs mapped to configure one ECCE.
  • the hopping size of the EPRB index to select an EREG constituting any ECCE can be regarded as one EPRB in the case of 1-1), and as described above only in the case of 1-2). EPRBs.
  • the present embodiment will be described in detail, starting from the EREG # 0 of EPRB # 0 in M EPRBs of EPRB # 0 to EPRB # (M-1) constituting an arbitrary distributed EPDCCH set.
  • One EREG is selected from each EPRB while hopping the EPRB by the hopping size according to the condition of Example 3.
  • the EREG index selected from the EPRB is increased by one.
  • the cyclic shifting returns to the first EPRB (smallest EPRB). Apply cyclic shifting to continue the EREG mapping.
  • EREG # 0 of EPRB # 0 is selected, and EREG # # in EPRB # 1.
  • Select 1 select EREG # 2 in EPRB # 2, and then select EREG # 3 in EPRB # 0 to select and map N EREGs through a total of N EPRBs (where N> M is In this case, EPRB may be selected in duplicate).
  • the first ECCE / EREG mapping consisting of N EREGs proceeds to the next EPRB and hops one EPRB of each EPRB, starting with EREG # 0 of EPRB # 1 and hopping the same hopping size. In increments, select a total of N EREGs to map the second ECCE. In this manner, the EREG constituting the Mth ECCE is mapped to the EREG # 0 starting from EPRB # (M-1), which is the last EPRB constituting the EPDCCH set.
  • M-1 the last EPRB constituting the EPDCCH set.
  • EREGs of EREG # 0 to EREG # (N-1) of all the EPRBs up to each EPRB # 0 to EPRB # (M-1) constituting the EPDCCH set are completed. It is used to map ECCE up to ECCE # 0 ⁇ ECCE # (M-1). Then, start again with EREG #N of EPRB # 0 and start the second turn in the same way, starting with EREG #N of EPRB # 0, starting from ECCE #M to ECCE # (2M-1), respectively. Perform EREG mapping.
  • the ECCE / EREG mapping method for any distributed EPDCCH set according to the embodiment 4-2 may be represented by Equations 3 and 4 below.
  • N ⁇ M and ECCE #i is ⁇ EREG #n (a) of EPRB #m (a) ⁇ .
  • a 0,1, ..., N-1 ego, to be.
  • [x] is the maximum integer not exceeding x
  • N ⁇ M and ECCE #i is ⁇ EREG #n (a) of EPRB #m (a) ⁇ .
  • a 0, 1, ..., for N-1, ego, (Where [x] is the maximum integer not exceeding x)
  • FIG. 13 is a configuration diagram of an ECCE in a distributed EPDCCH set according to the embodiment 4-2.
  • the number N of EREGs constituting the ECCE is 4, and the index i of the ECCE is 0.
  • FIG. 13 the number N of EREGs constituting the ECCE is 4, and the index i of the ECCE is 0.
  • FIG. 13A is a configuration diagram of an ECCE according to Equation 3, and referring to FIG. 13A, the number M of EPRBs constituting the EPDCCH set is 2.
  • FIG. 13B is a configuration diagram of the ECCE according to Equation 4, and referring to FIG. 13B, the number M of EPRBs constituting the EPDCCH set is 8.
  • Example 4-2 while selecting a total of N EREGs by one EREG while hopping the EPRB, unlike Example 4-2, the EREG is selected by increasing the index by 1 for each EPRB hopping. Not according to the above N value It can be selected and mapped while increasing the EREG index. That is, in the M EPRBs of EPRB # 0 to EPRB # (M-1) constituting an arbitrary distributed EPDCCH set, the EPRB is hopped by the hopping size according to the hopping size according to the third embodiment, starting with EREG # 0 of EPRB # 0. Select one EREG from each EPRB.
  • the EREG index selected from the EPRB is not increased by 1 as in the above embodiment 4-2, but according to the N value. Increase it.
  • M 8
  • the first ECCE (ECCE # 0) constituting the EPDCCH set is composed of EREG # 0 of EPRB # 0, EREG # 4 of EPRB # 2, EREG # 8 of EPRB # 4, and EREG # 12 of EPRB # 6. do.
  • the second ECCE index is composed of EREG # 0 of EPRB # 1, EREG # 4 of EPRB # 3, EREG # 8 of EPRB # 5, and EREG # 12 of EPRB # 7.
  • ECCE # (M-1) which is the last ECCE of the first turn and the Mth ECCE of the EPDCCH set (in this example, ECCE # 7), is equivalent to EREG # 0 and EPRB # 1 of EPRB # 7.
  • EREG # 4 EREG # 8 of EPRB # 3 and EREG # 12 of EPRB # 5.
  • the modulo of all the EPRBs up to each EPRB # 0 to EPRB # (M-1) constituting the corresponding EPDCCH set is, in this example, all EREGs having indices where modulo 4 is zero are used to map M (8 in this example) ECCEs up to respective ECCE # 0 to ECCE # (M-1).
  • ECCE #M which is the (M + 1) th ECCE, that constitutes the ECCE in the same way, is set in the same way. Mapping is via EREG # 13 at 6, and the second ECCE ECCE # (2M-1) is mapped to EREG # 1 at EPRB # 7, EREG # 5 at EPRB # 1, EREG # 9 at EPRB # 3, and EPRB # Termination by mapping via EREG # 13 of 5.
  • Equations 5 and 6 The ECCE / EREG mapping method for any distributed EPDCCH set according to the present embodiment 4-3 may be represented by Equations 5 and 6 below.
  • N ⁇ M and ECCE #i is ⁇ EREG #n (a) of EPRB #m (a) ⁇ .
  • a 0,1, ..., N-1, ego, to be.
  • [x] is the maximum integer not exceeding x
  • N ⁇ M and ECCE #i is ⁇ EREG #n (a) of EPRB #m (a) ⁇ .
  • a 0,1, ..., N-1 ego, to be.
  • [x] is the maximum integer not exceeding x
  • FIG. 14 is a configuration diagram of an ECCE in a distributed EPDCCH set according to the embodiment 4-3.
  • the number N of EREGs constituting the ECCE is 4, and the index i of the ECCE is 0.
  • FIG. 14A illustrates a configuration of ECCE according to Equation 5.
  • the number M of EPRBs constituting the EPDCCH set is 2.
  • FIG. 14B is a configuration diagram of the ECCE according to Equation 6, and referring to FIG. 14B, the number M of EPRBs constituting the EPDCCH set is 8.
  • legacy PDCCH have a size of 2.
  • the usable RE number is summarized in Table 3.
  • Example 4-2 configures ECCE while increasing the index of EREG by one.
  • a summary of the number of available REs of ECCEs according to Example 4-2 is shown in Table 10 below.
  • EREG # 1 there are 28 usable REs consisting of EREG # 0, EREG # 4, EREG # 8, and EREG # 12 for one transmit antenna port (1 Tx CRS), and EREG # 1, EREG #.
  • the number of usable REs of the ECCE composed of 5, EREG # 9, and EREG # 13 is 29, and there is a difference in the number of usable REs from each other. This is smaller than the difference in the number of available REs between ECCEs according to the embodiment 4-2.
  • the ECCEs according to the embodiment 4-3 do not show a difference in the number of usable REs between the ECCEs for the two transmit antenna ports (2 Tx CRS) and the four transmit antenna ports (4 Tx CRS).
  • ECCEs may be configured with EREGs having the same index, and in the case of an EPDCCH set including 8 EPRBs, EPRB # 0, EPRB # 2, EPRB # 4, and EPRB # 6.
  • EREG eg, EREG corresponding to EREG # 0
  • Example 4-1 may be independent of Example 3, in which case, for example, the same index in four EPRBs of consecutive indexes of EPRB # 0, EPRB # 1, EPRB # 2, and EPRB # 3.
  • An EREG (eg, an EREG corresponding to EREG # 0) may be configured as one ECCE.
  • Example 4 Another example of Example 4, which is independent of Example 3, is given.
  • an ECCE may be configured with EREGs (eg, EREG # 0, EREG # 1, EREG # 2, and EREG # 3) of consecutive indexes, and the EPDCCH set including two EPRBs may be configured.
  • Select EREG # 0 from EPRB # 0, select EREG # 1 from EPRB # 1, select EREG # 2 from EPRB # 0 again, and select EREG # 3 from EPRB # 1 again.
  • Example 4-2 may be independent of Example 3, in this case, for example, select EREG # 0 in EPRB # 0 and select EREG # 1, EREG # 2, EREG # 3 in EPRB # 1. Can configure one ECCE.
  • the ECCE may be configured by selecting EREG while increasing the index by 16 / N without hopping the EPRB independently of Example 3.
  • one ECCE may be configured by selecting EREG # 0, EREG # 4, and EREG # 8 in EPRB # 0 and EREG # 12 in EPRB # 1 in an EPDCCH set consisting of two EPRBs.
  • Example 3 and Example 4 provide an ECCE / EREG mapping method in any distributed EPDCCH set, and the ECCE / EREG mapping function of Example 4-1 is defined by Equations 1 and 2 below.
  • the ECCE / EREG mapping function according to Example 4-2 was defined by Equations 3 and 4
  • the ECCE / EREG mapping function of Example 4-3 was defined by Equations 5 and 6. .
  • Equations 1 to 6 are examples of function expressions reflecting the respective embodiments, and other forms of functional formulas incorporating the concepts of Embodiments 4-1, 4-2, and 4-3 are provided. It may be.
  • 15 is a flowchart illustrating a method for transmitting control information of a transmission / reception point according to an embodiment of the present invention.
  • a transmission / reception point for transmitting control information to a UE through data regions of resource block pairs of a subframe may include at least one centralized type for resource block pairs of some of the resource block pairs.
  • a localized downlink control channel set is configured and at least one distributed downlink control channel set is configured for resource block pairs of other portions of the resource block pairs (S1510).
  • the transmitting and receiving point is the resource element group (enhanced Resoure Element Group) consisting of the resource elements having the same index for the resource element (index) is assigned to repeat the 16 numbers in each of the resource block pairs frequency-first
  • the control channel elements are allocated to four resource element groups of different indices having the same dividing by four or eight resource element groups of different indices having the same dividing by two (S1520).
  • step S1520 the resource element groups constituting the control channel element in the centralized downlink control channel set are located in one resource block pair and the resource element groups constituting the control channel element in the distributed downlink control channel set are two or more resources. It is located in a block pair.
  • index assigned to a resource block pair may refer to the foregoing description with reference to FIGS. 4 to 9.
  • PRB pair resource block pair
  • the EREG is indexed in a frequency-prioritized manner to numbers from 0 to 15.
  • index 12 of the second symbol is indexed at index 11 of the first symbol by indexing with a symbol reference cyclic shift.
  • the second symbol is indexed without the symbol reference cyclic shift. Is not indexed adjacent to index 11 of the first symbol.
  • the transmission / reception point may allocate ECCEs to EREGs corresponding to different indices divided by four among EREGs or EREGs corresponding to different indices divided by two.
  • EREGs # 0, # 4, # 8, and # 12 may constitute one ECCE for allocating ECCEs with EREGs corresponding to different indices divided by 4, and EREG # 1.
  • Another one with ECCE, EREG # 2, # 6, # 10, # 14, another with # 5, # 9, # 13, another with ECCE, EREG # 3, # 7, # 11, # 15 ECCE can be configured.
  • EREGs # 0, # 2, # 4, # 6, # 8, # 10, # 12, and # 14 may be assigned to assigning ECCEs to EREGs corresponding to different indices divided by two.
  • One ECCE may be configured, and EREGs # 1, # 3, # 5, # 7, # 9, # 11, # 13, and # 15 may configure another ECCE.
  • the transmitting / receiving point may allocate ECCE by distributing EREGs to resource block pairs so that a frequency diversity gain is maximized at step S1520 of allocating control channel elements to a distributed downlink control channel set.
  • Content described in Example 3 may be one of these methods.
  • the transmit / receive point hops two PRBs from EPRB # 0 in eight PRB pairs, and selects EREGs from EPRB # 2, EPRB # 4, and EPRB # 6, respectively, and allocates ECCE.
  • the transmit / receive point may allocate ECCE to EREGs corresponding to different indices divided by 4 as described above in the PRB pairs (EPRB # 0, EPRB # 2, EPRB # 4, and EPRB # 6).
  • ECCEs may be allocated to EREGs corresponding to different indices having a remainder divided by two.
  • ECCE By selecting EREG # 0 in EPRB # 0, EREG # 4 in EPRB # 2, EREG # 8 in EPRB # 4, and EREG # 12 in EPRB # 6. Can be. As another example, you can configure ECCE by selecting EREG # 12 in EPRB # 0, EREG # 8 in EPRB # 2, EREG # 4 in EPRB # 4, and EREG # 0 in EPRB # 6. Can be.
  • the indexes of EREGs assigned to ECCE are ⁇ 0,4,8,12 ⁇ , ⁇ 1,5,9,13 ⁇ , ⁇ 2,6,10,14 ⁇ and ⁇ 3,7,11 , 15 ⁇ or one of ⁇ 0,2,4,6,8,10,12,14 ⁇ and ⁇ 1,3,5,7,9,11,13,15 ⁇ .
  • the transmission / reception point transmits control information to the terminal through at least one control channel element among the control channel elements (S1530).
  • the control information may be transmitted through an EPDCCH, which is a control channel transmitted in the data region 220, and the EPDCCH is allocated to the at least one control channel element in a resource block pair.
  • 16 is a flowchart illustrating a method for receiving control information of a terminal according to another embodiment of the present invention.
  • a terminal receiving control information from a transmission / reception point through data areas of resource block pairs (Physical Resource Block pairs) of a subframe includes:
  • each of the resource block pairs divided by 4 of the Enhanced Resoure Groups consisting of resource elements having the same index for the Resource Elements that are repeated in the frequency-first order of 16 numbers Receives a radio signal through at least one control channel element among control channel elements allocated to four resource element groups of the same different index or divided by two and eight resource element groups of the same different index ( S1610).
  • the terminal may acquire control information from the received radio signal.
  • At least one localized enhanced physical downlink control channel set is configured for resource block pairs of some of the resource block pairs, and at least one resource block pair for other portions of the resource block pairs.
  • a distributed downlink control channel set is configured, and in step S1610, the resource element groups constituting the control channel element in the centralized downlink control channel set are located in one resource block pair and the distributed downlink control channel Resource element groups constituting control channel elements in the set are located in two or more resource block pairs.
  • index assigned to a resource block pair may refer to the foregoing description with reference to FIGS. 4 to 9.
  • PRB pair resource block pair
  • the EREG is indexed in a frequency-prioritized manner to numbers from 0 to 15.
  • index 12 of the second symbol is indexed at index 11 of the first symbol by indexing with a symbol reference cyclic shift.
  • the second symbol is indexed without the symbol reference cyclic shift. Is not indexed adjacent to index 11 of the first symbol.
  • EREGs whose remainders divided by four of the EREGs correspond to the same different indexes, or EREGs whose remainders divided by 2, which correspond to the same different indexes may be allocated to form an ECCE.
  • EREGs # 0, # 4, # 8, and # 12 may constitute one ECCE for allocating ECCEs with EREGs corresponding to different indices divided by 4, and EREG # 1.
  • Another one with ECCE, EREG # 2, # 6, # 10, # 14, another with # 5, # 9, # 13, another with ECCE, EREG # 3, # 7, # 11, # 15 ECCE can be configured.
  • EREGs # 0, # 2, # 4, # 6, # 8, # 10, # 12, and # 14 may be assigned to assigning ECCEs to EREGs corresponding to different indices divided by two.
  • One ECCE may be configured, and EREGs # 1, # 3, # 5, # 7, # 9, # 11, # 13, and # 15 may configure another ECCE.
  • Control channel elements allocated to the distributed downlink control channel set may be allocated to resource block pairs so as to maximize frequency diversity gain.
  • Content described in Example 3 may be one of these methods.
  • EREGs are selected from EPRB # 2, EPRB # 4, and EPRB # 6 while hopping by two PRBs from EPRB # 0 in eight PRB pairs to configure ECCE.
  • ECCE may be allocated to EREGs corresponding to different indices divided by 4 as described above, or 2 ECCE may be allocated to EREGs corresponding to different indices divided by.
  • EREG # 0 is selected in EPRB # 0
  • EREG # 4 is selected in EPRB # 2
  • EREG # 8 is selected in EPRB # 4
  • EREG # 12 is selected in EPRB # 6, and ECCE is configured.
  • Can be is selected in EPRB # 12
  • EREG # 8 is selected in EPRB # 2
  • EREG # 4 is selected in EPRB # 4
  • EREG # 0 is selected in EPRB # 6 to configure ECCE. Can be.
  • the indexes of EREGs assigned to ECCE are ⁇ 0,4,8,12 ⁇ , ⁇ 1,5,9,13 ⁇ , ⁇ 2,6,10,14 ⁇ and ⁇ 3,7,11 , 15 ⁇ or one of ⁇ 0,2,4,6,8,10,12,14 ⁇ and ⁇ 1,3,5,7,9,11,13,15 ⁇ .
  • 17 is a diagram showing the configuration of a transmission and reception point according to another embodiment of the present invention.
  • a transmission / reception point 1700 that transmits control information to a terminal through data regions of resource block pairs of a subframe includes a control unit 1710, a transmitter 1720, and a receiver 1730. And the like.
  • the controller 1710 configures at least one localized downlink physical downlink control channel set for the resource block pairs of some of the resource block pairs, and applies the resource block pairs of the other part of the resource block pairs to each other.
  • At least one distributed downlink control channel set is configured with respect to each of the resource block pairs, and the resource elements having the same index with respect to the resource elements that are indexed by repeating 16 numbers in each of the resource block pairs with frequency priority.
  • the control channel is composed of four resource element groups of 4 different indexes with the remainder divided by 4 among the enhanced Resoure Element Groups consisting of 4 or 8 resource element groups of the same index with the remainder divided by 2 Allocate elements.
  • the controller 1710 controls the resource element groups constituting the control channel element in the centralized downlink control channel set to be located in one resource block pair, and the resource element group constituting the control channel element in the distributed downlink control channel set. Control to be located in two or more resource block pairs.
  • the indexes of EREGs assigned to ECCE are ⁇ 0,4,8,12 ⁇ , ⁇ 1,5,9,13 ⁇ , ⁇ 2,6,10,14 ⁇ and ⁇ 3,7,11 , 15 ⁇ or one of ⁇ 0,2,4,6,8,10,12,14 ⁇ and ⁇ 1,3,5,7,9,11,13,15 ⁇ .
  • control unit 1710 controls the operation of the overall transmission and reception point according to the ECCE / EREG mapping method for the EPDCCH transmission and the ECCE indexing in any centralized and distributed EPDCCH set necessary to carry out the above-described present invention.
  • the transmitter 1720 transmits control information to the terminal through at least one control channel element among the control channel elements.
  • the transmitter 1720 and the receiver 1730 are used to transmit and receive signals, messages, data, and information necessary for carrying out the present invention.
  • FIG. 18 is a diagram illustrating a configuration of a terminal according to another embodiment of the present invention.
  • a terminal 1800 that receives control information from a transmission / reception point through data areas of resource block pairs of a subframe includes a receiver 1810, a controller 1820, and a transmitter 1830. And the like.
  • the receiving unit 1810 repeats 16 numbers in each of the resource block pairs in frequency-first order, and among the enhanced element groups (enhanced resource groups) having resource elements having the same indexes for the resource elements assigned the indexes.
  • At least one localized enhanced physical downlink control channel set is configured for resource block pairs of some of the resource block pairs, and at least one resource block pair of another part of the resource block pairs.
  • a distributed downlink control channel set is configured, and the resource element groups constituting the control channel element in the centralized downlink control channel set are located in one resource block pair and controlled in the distributed downlink control channel set. Resource element groups constituting the channel element are located in two or more resource block pairs.
  • the indexes of EREGs assigned to ECCE are ⁇ 0,4,8,12 ⁇ , ⁇ 1,5,9,13 ⁇ , ⁇ 2,6,10,14 ⁇ and ⁇ 3,7,11 , 15 ⁇ or one of ⁇ 0,2,4,6,8,10,12,14 ⁇ and ⁇ 1,3,5,7,9,11,13,15 ⁇ .
  • the controller 1820 acquires control information from the radio signal received by the receiver 1810. In addition, the controller 1820 controls the overall operation of the UE according to the ECCE / EREG mapping method for receiving the EPDCCH necessary for carrying out the above-described present invention and the ECCE indexing in any centralized and distributed EPDCCH set.
  • the transmitter 1830 and the receiver 1810 are used to transmit and receive signals, messages, data, and information necessary for carrying out the above-described present invention.

Abstract

La présente invention concerne un procédé pour transmettre des informations de commande d'un point d'émission-réception, qui transmet des informations de commande à un terminal par l'intermédiaire d'une zone de données d'une paire de blocs de ressources physiques d'une sous-trame. Le procédé comprend les étapes consistant à : configurer au moins un ensemble de canaux de contrôle de liaison descendante du type localisé pour certaines paires de blocs de ressources physiques parmi les paires de blocs de ressources physiques ; configurer au moins un ensemble de canaux de contrôle de liaison descendante du type réparti pour certaines autres paires de blocs de ressources physiques ; et attribuer des éléments de canal de contrôle à 8 groupes d'éléments de ressources, qui ont différents index pour lesquels les restes sont les mêmes, qui sont obtenus en divisant des groupes d'éléments de ressources améliorés par 4, lesquels groupes comportent des éléments de ressources ayant le même index en relation avec des éléments de ressources auxquels 16 nombres, qui proviennent des paires de blocs de ressources physiques, sont donnés en tant qu'index de manière répétée sur la base d'une priorité fréquentielle ; et transmettre des informations de commande au terminal par l'intermédiaire d'au moins l'un des éléments de canal de contrôle.
PCT/KR2013/006816 2012-09-14 2013-07-30 Procédé de transmission d'informations de commande de point d'émission-réception et ledit point d'émission-réception, procédé de réception d'informations de commande pour un terminal et ledit terminal WO2014042356A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380059609.XA CN104798330B (zh) 2012-09-14 2013-07-30 传输接收点的控制信息传输方法及此传输接收点、终端的控制信息接收方法及此终端
US14/428,234 US9385850B2 (en) 2012-09-14 2013-07-30 Method for transmitting control information of transceiving point and said transceiving point, method for receiving control information for terminal and said terminal

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
KR10-2012-0102452 2012-09-14
KR20120102452 2012-09-14
KR20120103584 2012-09-18
KR10-2012-0103584 2012-09-18
KR20120111501 2012-10-08
KR10-2012-0111501 2012-10-08
KR10-2012-0144531 2012-12-12
KR1020120144531A KR101574713B1 (ko) 2012-09-14 2012-12-12 송수신포인트의 제어 정보 전송 방법 및 그 송수신포인트, 단말의 제어 정보 수신 방법 및 그 단말
KR10-2012-0145368 2012-12-13
KR1020120145368A KR101562694B1 (ko) 2012-09-18 2012-12-13 송수신포인트의 제어 정보 전송 방법 및 그 송수신포인트, 단말의 제어 정보 수신 방법 및 그 단말

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CN106685503A (zh) * 2015-11-06 2017-05-17 中兴通讯股份有限公司 信道状态测量导频csi-rs的配置方法及装置
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CN106685503A (zh) * 2015-11-06 2017-05-17 中兴通讯股份有限公司 信道状态测量导频csi-rs的配置方法及装置
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US11871386B2 (en) 2017-03-17 2024-01-09 Panasonic Intellectual Property Corporation Of America Base station, terminal, and communication method

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