WO2013115122A1 - Dispositif de station mobile, dispositif de station de base, procédé de communication, circuit intégré et système de communication - Google Patents

Dispositif de station mobile, dispositif de station de base, procédé de communication, circuit intégré et système de communication Download PDF

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Publication number
WO2013115122A1
WO2013115122A1 PCT/JP2013/051709 JP2013051709W WO2013115122A1 WO 2013115122 A1 WO2013115122 A1 WO 2013115122A1 JP 2013051709 W JP2013051709 W JP 2013051709W WO 2013115122 A1 WO2013115122 A1 WO 2013115122A1
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Prior art keywords
phich
base station
station apparatus
resource
mobile station
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PCT/JP2013/051709
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English (en)
Japanese (ja)
Inventor
翔一 鈴木
公彦 今村
立志 相羽
中嶋　大一郎
智造 野上
寿之 示沢
渉 大内
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シャープ株式会社
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Publication of WO2013115122A1 publication Critical patent/WO2013115122A1/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

Definitions

  • the present invention provides a communication system including a plurality of mobile station apparatuses and a base station apparatus, wherein the base station apparatus can efficiently transmit a signal including control information to the mobile station apparatus.
  • the present invention relates to a mobile station apparatus, a base station apparatus, a communication method, an integrated circuit, and a communication system that can efficiently receive a signal including control information from a base station apparatus.
  • LTE Long Term Evolution
  • EUTRA Evolved Universal Terrestrial Radio Access
  • 3GPP Third Generation Partnership Project
  • OFDM orthogonal frequency division multiplexing
  • a SC-FDMA Single-Carrier-Frequency-Division-Multiple-Access
  • uplink uplink; referred to as UL
  • the DFT-Spread OFDM Discrete-Fourier-Transform-Spread-OFDM
  • LTE-A LTE-Advanced
  • LTE-A LTE-Advanced
  • a channel means a medium used for signal transmission.
  • a channel used in the physical layer is called a physical channel.
  • a channel used in a medium access control (Medium Access Control: MAC) layer is called a logical channel.
  • Physical channel types include physical downlink shared channel (Physical Downlink Shared CHannel: PDSCH) used for transmission and reception of downlink data and control information, physical downlink control channel (Physical) used for transmission and reception of downlink control information Downlink Control CHannel: PDCCH).
  • PDSCH Physical Downlink shared channel
  • Physical downlink control channel Physical downlink control channel
  • PDCCH Physical downlink Control CHannel
  • a mobile station apparatus or a base station apparatus arranges and transmits a signal generated from control information, data, and the like on each physical channel.
  • Non-Patent Document 1 introduction of a new control channel for transmitting control information related to a data signal has been studied (Non-Patent Document 1). For example, improving the overall control channel capacity is being considered. For example, it has been considered to support interference coordination in the frequency domain for a new control channel.
  • the present invention has been made in view of the above points, and an object thereof is to efficiently ACK a base station device to a mobile station device in a communication system including a plurality of mobile station devices and a base station device.
  • Communication system, mobile station apparatus, base station apparatus, communication method and integration capable of transmitting a signal including / NACK and allowing the mobile station apparatus to efficiently receive a signal including ACK / NACK from the base station apparatus Regarding the circuit.
  • the present invention has taken the following measures. That is, the mobile station apparatus of the present invention transmits a transport block to the base station apparatus using PUSCH, and transmits ACK / NACK for the transport block to the base station using the first PHICH or the second PHICH. Receive from the station equipment.
  • the first PHICH is multiplied by a first sequence.
  • up to eight first PHICHs multiplied by different first sequences are arranged in the same first resource.
  • the second PHICH is multiplied by a second sequence.
  • up to two second PHICHs multiplied by different second sequences are arranged in the same second resource.
  • the length of the first sequence is 4, and the length of the second sequence is 1.
  • the base station apparatus of the present invention receives a transport block from the mobile station apparatus using PUSCH, and uses ACK / NACK for the transport block using the first PHICH or the second PHICH. Is transmitted to the mobile station apparatus. Further, the base station apparatus of the present invention multiplies the first PHICH by the first sequence and multiplies the first PHICH by multiplying the first sequence by the same first resource. To place. In addition, the base station apparatus of the present invention multiplies the second PHICH by a second sequence, and multiplies a different second sequence to up to two second PHICHs by using the same second resource. To place. In the base station apparatus of the present invention, the length of the first sequence is 4, and the length of the second sequence is 1.
  • a radio communication method of the present invention is a radio communication method used for a mobile station apparatus communicating with a base station apparatus, and transmits a transport block to the base station apparatus using PUSCH, ACK / NACK for the transport block is received from the base station apparatus using the second PHICH or the second PHICH.
  • the first PHICH is multiplied by a first sequence.
  • up to eight first PHICHs multiplied by different first sequences are arranged in the same first resource.
  • the second PHICH is multiplied by a second sequence.
  • up to two second PHICHs multiplied by different second sequences are arranged in the same second resource.
  • the length of the first sequence is 4, and the length of the second sequence is 1.
  • a radio communication method of the present invention is a radio communication method used for a base station apparatus that communicates with a mobile station apparatus, and receives a transport block from the mobile station apparatus using PUSCH, ACK / NACK for the transport block is transmitted to the mobile station apparatus using the second PHICH or the second PHICH.
  • the first PHICH is multiplied by a first sequence, and different first sequences are multiplied by up to eight first PHICHs in the same first resource.
  • the second PHICH is multiplied by a second sequence, and a different second sequence is multiplied by up to two second PHICHs in the same second resource.
  • the length of the first sequence is 4, and the length of the second sequence is 1.
  • An integrated circuit according to the present invention is an integrated circuit that is mounted on a mobile station device that communicates with a base station device, thereby causing the mobile station device to perform a plurality of functions.
  • the mobile station apparatus has a function of transmitting a port block to the base station apparatus, and a function of receiving ACK / NACK for the transport block from the base station apparatus using the first PHICH or the second PHICH. Let it show.
  • the first PHICH is multiplied by a first sequence.
  • up to eight first PHICHs multiplied by different first sequences are arranged in the same first resource.
  • the second PHICH is multiplied by a second series.
  • up to two second PHICHs multiplied by different second sequences are arranged in the same second resource.
  • the length of the first series is 4, and the length of the second series is 1.
  • An integrated circuit of the present invention is an integrated circuit that is mounted on a base station device that communicates with a mobile station device, thereby causing the base station device to perform a plurality of functions.
  • the function of multiplying the first sequence by up to eight, the function of arranging up to eight first PHICHs multiplied by different first sequences in the same first resource, and the second PHICH A function of multiplying two sequences and a function of arranging up to two second PHICHs multiplied by different second sequences in the same second resource.
  • the length of the first series is 4, and the length of the second series is 1.
  • wireless communications system of this invention is a radio
  • the communication system to which the present invention is applicable is not limited to a communication system that is upward compatible with LTE, such as LTE or LTE-A.
  • LTE Long Term Evolution
  • LTE-A Universal Mobile Telecommunications System
  • the base station apparatus can efficiently transmit a signal including ACK / NACK to the mobile station apparatus, and the mobile station apparatus efficiently transmits a signal including ACK / NACK from the base station apparatus.
  • a more efficient communication system that can receive data can be realized.
  • FIG. 1 It is a schematic block diagram which shows the structure of the mobile station apparatus 5 which concerns on embodiment of this invention. It is a schematic block diagram which shows the structure of the base station apparatus 3 which concerns on embodiment of this invention. It is a figure explaining the outline about the whole picture of the communications system concerning the embodiment of the present invention. It is a figure which shows schematic structure of the time frame of the downlink from the base station apparatus 3 which concerns on embodiment of this invention, or RRH4 to the mobile station apparatus 5.
  • FIG. It is a figure which shows an example of allocation of the physical channel within the time frame of the downlink which concerns on embodiment of this invention. It is a figure which shows an example of arrangement
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single carrier FDMA
  • a CDMA system may implement a radio technology (standard) such as Universal Terrestrial Radio Access (UTRA) or cdma2000®.
  • UTRA includes Wideband CDMA (WCDMA) and other improved versions of CDMA.
  • cdma2000 covers IS-2000, IS-95, and IS-856 standards.
  • a TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM).
  • GSM Global System for Mobile Communications
  • OFDMA systems include Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM (registered trademark), etc.
  • Wireless technology may be implemented.
  • UTRA and E-UTRA are part of the universal mobile communication system (UMTS).
  • 3GPP LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named Third Generation Partnership Project (3GPP).
  • cdma2000 and UMB are described in documents from an organization named Third Generation Partnership Project 2 (3GPP2).
  • 3GPP2 Third Generation Partnership Project 2
  • FIG. 3 is a diagram for explaining the outline of the overall image of the communication system according to the embodiment of the present invention.
  • the communication system 1 shown in this figure includes a base station device (eNodeB, NodeB, BS: “Base Station”, AP: “Access Point, also called an access point, macro base station”) 3 and a plurality of RRHs (Remote Radio Head, base 4) 4A, 4B, 4C, and a plurality of mobile station devices (UE: User Equipment), remote ⁇ Radio Unit: also called RRU) (also called remote antenna, distributed antenna)
  • UE User Equipment
  • RRU Radio Unit
  • MS Mobile Station
  • MT Mobile Terminal, terminal, terminal device, also called mobile terminal
  • 5A, 5B, 5C communicate with each other.
  • RRHs 4A, 4B, and 4C are referred to as RRH4, and the mobile station devices 5A, 5B, and 5C are referred to as mobile station devices 5 and will be described as appropriate.
  • the base station device 3 and the RRH 4 cooperate to communicate with the mobile station device 5.
  • the base station apparatus 3 and the RRH 4A perform cooperative communication with the mobile station apparatus 5A
  • the base station apparatus 3 and the RRH 4B perform cooperative communication with the mobile station apparatus 5B
  • the base station apparatus 3 and the RRH 4C are mobile stations. Performs cooperative communication with the device 5C.
  • RRH can be said to be a special form of the base station apparatus.
  • the RRH has only a signal processing unit, and can be said to be a base station apparatus in which parameters used in the RRH are set by another base station apparatus and scheduling is determined. Therefore, in the following description, it should be noted that the expression “base station apparatus 3” appropriately includes RRH4.
  • cooperative communication in which signals are transmitted and received in cooperation using a plurality of cells may be used.
  • a mode in which the base station apparatus communicates using any one frequency band is referred to as a “cell”.
  • different weighting signal processing precoding processing
  • base station device 3 and RRH4 cooperate with the signal to transmit the same mobile station. It transmits to the apparatus 5 (Joint Processing, Joint Transmission).
  • scheduling is performed for the mobile station apparatus 5 in cooperation with a plurality of cells (base station apparatus 3 and RRH 4) (Coordinated Scheduling: CS).
  • a signal is transmitted to the mobile station apparatus 5 by applying beamforming in cooperation with a plurality of cells (base station apparatus 3 and RRH 4) (Coordinated Beamforming: CB).
  • CB Coordinatd Beamforming
  • a signal is transmitted using a predetermined resource only in one cell (base station apparatus 3 or RRH4), and a signal is transmitted using a predetermined resource in one cell (base station apparatus 3 or RRH4). Do not send (Blanking, Muting).
  • different cells may be configured by different base station devices 3 with respect to a plurality of cells used for cooperative communication, or different cells may be managed by the same base station device 3.
  • the different RRH4 may be configured, and the different cell may be configured by the base station apparatus 3 and the RRH4 managed by the base station apparatus 3 different from the base station apparatus.
  • the plurality of cells are physically used as different cells, but may be logically used as the same cell.
  • a configuration may be used in which a common cell identifier (physical layer cell ID: Physical layer layer cell ID) is used for each cell.
  • a configuration in which a plurality of transmitting apparatuses (base station apparatus 3 and RRH 4) transmit a common signal to the same receiving apparatus using the same frequency band is called a single frequency network (SFN).
  • SFN single frequency network
  • a downlink that is a communication direction from the base station device 3 or the RRH 4 to the mobile station device 5 is a downlink pilot channel, a physical downlink control channel (PDCCH: Physical). It includes a physical HARQ indicator channel (PHICH: Physical, Hybrid, Automatic, Repeat, reQuest, Indicator, and CHannel), and a physical downlink shared channel (PDSCH: also called Physical, Downlink, Shared, and CHannel). As for PDSCH, cooperative communication is applied or not applied.
  • the PDCCH includes a first PDCCH and a second PDCCH (E-PDCCH: Enhanced-PDCCH).
  • the PHICH includes a first PHICH and a second PHICH (E-PHICH: Enhanced-PHICH).
  • the downlink pilot channel is based on a first type reference signal (CRS described later), a second reference signal (UE-specific RS described later), and a third type reference signal (CSI-RS described later). Composed.
  • the first type of reference signal is used for demodulation of PDSCH, first PDCCH, and first PHICH.
  • the second type of reference signal is used for demodulation of PDSCH, second PDCCH, and second PHICH.
  • the first PDCCH and the first PHICH are physical channels in which the same transmission port (antenna port, transmission antenna) as that of the first type reference signal is used.
  • the second PDCCH and the second PHICH are physical channels in which the same transmission port as that of the second type reference signal is used.
  • the mobile station apparatus 5 demodulates the signal mapped to the first PDCCH and the second PHICH using the first type reference signal and maps the signal to the second PDCCH and the second PHICH.
  • the signal is demodulated using a second type of reference signal.
  • the first type of reference signal is a reference signal that is common to all mobile station apparatuses 5 in the cell, and is inserted in almost all resource blocks. Any mobile station apparatus 5 can use this reference signal. is there.
  • the second type of reference signal is a reference signal that can be basically inserted only into the allocated resource block.
  • a precoding process can be adaptively applied to the second type of reference signal in the same manner as data.
  • the first PDCCH and the first PHICH are control channels arranged in OFDM symbols in which no PDSCH is arranged.
  • the second PDCCH and the second PHICH are control channels arranged in the OFDM symbol in which the PDSCH is arranged.
  • the first PDCCH and the first PHICH are basically control channels in which signals are arranged over all PRBs (PRBs of the first slot) in the downlink system band.
  • the second PDCCH and the second PHICH are control channels in which signals are arranged over the PRB pair (PRB) configured by the base station apparatus 3 in the downlink system band.
  • an uplink (UL: also referred to as “Uplink”) that is a communication direction from the mobile station device 5 to the base station device 3 or the RRH 4 is also referred to as a physical uplink shared channel (PUSCH: “Physical Uplink” Shared ”CHannel).
  • PUSCH Physical Uplink shared channel
  • Uplink pilot channel uplink reference signal
  • UL RS Uplink Reference Signal
  • SRS Sounding Reference Signal
  • DM RS Demodulation Reference Signal
  • PUCCH Physical Uplink Control CHannel
  • a channel means a medium used for signal transmission.
  • a channel used in the physical layer is called a physical channel
  • a channel used in a medium access control (Medium Access Control: MAC) layer is called a logical channel.
  • MAC Medium Access Control
  • the present invention can be applied to a communication system when, for example, cooperative communication is applied to the downlink, for example, when multiple antenna transmission is applied to the downlink.
  • cooperative communication is not applied and a case where multi-antenna transmission is not applied in the uplink will be described, but the present invention is not limited to such a case.
  • PDSCH is a physical channel used for transmission / reception of downlink data.
  • PDCCH is a physical channel used for transmission / reception of downlink control information (downlink control information; Downlink Control Information: DCI).
  • the PUSCH is a physical channel used for transmission / reception of uplink data and control information (uplink control information; Uplink Control Information: UCI).
  • the PUCCH is a physical channel used for transmission / reception of uplink control information.
  • a scheduling request (Scheduling request: SR) or the like is used.
  • Other physical channel types include synchronization channel (Synchronization ⁇ CHannel: SCH) used for downlink synchronization establishment, physical random access channel (Physical Random Access CHannel: PRACH) used for uplink synchronization establishment.
  • Physical broadcast channel Physical Broadcast CHannel: PBCH
  • MIB Master Information Block
  • Physical control format indicator channel Physical Format Indicator CHannel
  • the mobile station device 5, the base station device 3, or the RRH 4 arranges and transmits signals generated from control information, data, etc. in each physical channel.
  • Data transmitted on the PDSCH or PUSCH is referred to as a transport block.
  • an area controlled by the base station apparatus 3 or the RRH 4 is called a cell.
  • FIG. 4 is a diagram illustrating a schematic configuration of a downlink time frame from the base station apparatus 3 or the RRH 4 to the mobile station apparatus 5 according to the embodiment of the present invention.
  • the horizontal axis represents the time domain
  • the vertical axis represents the frequency domain.
  • the downlink time frame is a unit such as resource allocation.
  • Each radio frame is 10 ms long.
  • Each radio frame is composed of 20 slots.
  • Each of the slots is 0.5 ms long and is numbered from 0 to 19.
  • Each subframe is 1 ms long and is defined by two consecutive slots.
  • the i-th subframe in the radio frame is composed of a (2 ⁇ i) th slot and a (2 ⁇ i + 1) th slot. That is, 10 subframes can be used in each 10 ms interval.
  • the downlink system band (referred to as a downlink system band) is a downlink communication band of the base station apparatus 3 or the RRH 4.
  • the downlink system bandwidth (referred to as a downlink system bandwidth) is configured with a frequency bandwidth of 20 MHz.
  • the signal or physical channel transmitted in each slot is represented by a resource grid.
  • the resource grid is defined by a plurality of subcarriers and a plurality of OFDM symbols.
  • the number of subcarriers constituting one slot depends on the downlink system bandwidth.
  • the number of OFDM symbols constituting one slot is seven.
  • Each element in the resource grid is referred to as a resource element.
  • the resource element is identified using a subcarrier number and an OFDM symbol number.
  • the resource block is used to express a mapping of resource elements of a certain physical downlink channel (PDSCH or the like).
  • PDSCH physical downlink channel
  • virtual resource blocks and physical resource blocks are defined.
  • a physical downlink channel is first mapped to a virtual resource block. Thereafter, the virtual resource block is mapped to the physical resource block.
  • One physical resource block is defined by 7 consecutive OFDM symbols in the time domain and 12 consecutive subcarriers in the frequency domain. Therefore, one physical resource block is composed of (7 ⁇ 12) resource elements.
  • One physical resource block corresponds to one slot in the time domain and corresponds to 180 kHz in the frequency domain. Physical resource blocks are numbered from 0 in the frequency domain.
  • One downlink PRB pair (downlink physical resource block pair; called DL PRB pair) is called two consecutive PRBs (downlink physical resource block; DL PRB in the downlink time domain). ).
  • FIG. 5 is a diagram showing an example of physical channel allocation in a downlink time frame according to the embodiment of the present invention.
  • each downlink subframe at least PDSCH, first PDCCH, second PDCCH, first PHICH, second PHICH, and PCFICH are arranged.
  • the first PDCCH is composed of the first to third OFDM symbols of the downlink subframe.
  • PCFICH and first PHICH are composed of the first OFDM symbol of the downlink subframe.
  • the second PHICH is composed of the fourth OFDM symbol of the downlink subframe.
  • the PDSCH and the second PDCCH are composed of the 4th to 14th OFDM symbols in the downlink subframe.
  • the PDSCH and the second PDCCH are arranged in different DL PRB pairs.
  • a downlink pilot channel used for transmission of a downlink reference signal (Reference signal: RS) (referred to as a downlink reference signal) is distributed to a plurality of downlink resource elements. Be placed.
  • the downlink reference signal includes a first type reference signal, a second type reference signal, and a third type reference signal.
  • the downlink reference signal is used for estimating propagation path fluctuations of PDSCH, PHICH (first PHICH, second PHICH) and PDCCH (first PDCCH, second PDCCH).
  • the first type of reference signal is used for demodulation of PDSCH, first PHICH, and first PDCCH.
  • the first type of reference signal is also called Cell specific RS: CRS.
  • the second type of reference signal is used for demodulation of PDSCH, second PHICH, and second PDCCH.
  • the second type of reference signal is also called UE-specific RS.
  • the third type of reference signal is used only for estimating propagation path fluctuations.
  • the third type of reference signal is also referred to as Channel State Information RS: CSI-RS.
  • the downlink reference signal is a known signal in the communication system 1. In the following description, a case will be described in which CRS is used as the first type reference signal, UE-specific RS is used as the second type reference signal, and CSI-RS is used as the third type reference signal.
  • PDCCH (first PDCCH or second PDCCH) is information indicating the allocation of DL PRB pairs to PDSCH, information indicating the allocation of UL PRB pairs to PUSCH, and a wireless network temporary identifier (called Radio Network Temporary Identifier: RNTI) ), Information relating to modulation scheme and coding rate, information relating to retransmission parameters, information relating to spatial multiplexing number and precoding matrix, and control information such as transmission power control command (TPC command) are arranged.
  • Control information included in the PDCCH is referred to as downlink control information (Downlink Control DCI).
  • DCI including information indicating assignment of DL PRB pair to PDSCH is referred to as downlink assignment (also referred to as “downlink assignment” or “downlink assignment”), and DCI including information indicating assignment of UL PRB pair to PUSCH.
  • downlink assignment also referred to as “downlink assignment” or “downlink assignment”
  • uplink grant referred to as Uplink grant: UL grant
  • FIG. 6 is a diagram illustrating an example of an arrangement of downlink reference signals in a downlink subframe of the communication system 1 according to the embodiment of the present invention.
  • FIG. 6 illustrates the arrangement of downlink reference signals in a single DL PRB pair, but a common arrangement method is used in a plurality of DL PRB pairs in the downlink system band. .
  • R0 to R1 indicate CRS of antenna ports 0 to 1, respectively.
  • the CRS can be arranged in all DL PRB pairs in the downlink system band.
  • the antenna port means a logical antenna used in signal processing, and one antenna port may be composed of a plurality of physical antennas.
  • D1 indicates UE-specific RS.
  • UE-specific RS When UE-specific RS is transmitted using a plurality of antenna ports, different codes are used for each antenna port. That is, CDM (Code Division Multiplexing) is applied to UE-specific RS.
  • FIG. 6 shows an example of arrangement of UE-specific RSs when the number of antenna ports used for transmitting UE-specific RS is one (antenna port 7) or two (antenna port 7 and antenna port 8). Show.
  • the base station apparatus 3 and the RRH 4 when the number of antenna ports used for transmission of UE-specific RS is two, a code having a code length of 2 is used in the same frequency region (subcarrier).
  • UE-specific RSs are multiplexed and arranged with two downlink resource elements continuous in a certain time domain (OFDM symbol) as one unit (unit of CDM).
  • OFDM symbol time domain
  • the UE-specific RS of the antenna port 7 and the antenna port 8 is multiplexed by DDM on D1.
  • a scramble code is further superimposed on the code of each antenna port. This scramble code is generated based on the cell ID and the scramble ID notified from the base station apparatus 3 and the RRH 4.
  • FIG. 7 is a diagram showing an example of a DL PRB pair to which CSI-RS (transmission path condition measurement reference signal) for 8 antenna ports according to the embodiment of the present invention is mapped.
  • FIG. 7 shows a case where CSI-RS is mapped when the number of antenna ports (number of CSI ports) used in base station apparatus 3 and RRH 4 is 8.
  • descriptions of CRS, UE-specific RS, PDCCH, PDSCH, and the like are omitted for simplification of description.
  • the CSI-RS uses a 2-chip orthogonal code (Walsh code) in each CDM group, and a CSI port (CSI-RS port (antenna port, resource grid)) is assigned to each orthogonal code. Code division multiplexing is performed for each port. Further, each CDM group is frequency division multiplexed. Using four CDM groups, CSI-RSs of 8 antenna ports of CSI ports 1 to 8 (antenna ports 15 to 22) are mapped. For example, in the CDM group C1 of CSI-RS, CSI-RSs of CSI ports 1 and 2 (antenna ports 15 and 16) are code division multiplexed and mapped.
  • CSI-RSs of CSI ports 3 and 4 are code division multiplexed and mapped.
  • CSI-RS CDM group C3 CSI-RSs of CSI ports 5 and 6 (antenna ports 19 and 20) are code-division multiplexed and mapped.
  • CDM group C4 of CSI-RS CSI-RS of CSI ports 7 and 8 (antenna ports 21 and 22) are code division multiplexed and mapped.
  • the configuration of CSI-RS (CSI-RS-Config-r10) is notified from the base station device 3 and the RRH 4 to the mobile station device 5.
  • the configuration of the CSI-RS includes information indicating the number of antenna ports set in the CSI-RS (antennaPortsCount-r10), information indicating a downlink subframe in which the CSI-RS is arranged (subframeConfig-r10), CSI-RS Information (ResourceConfig-r10) indicating a frequency region where the RS is arranged is included at least.
  • FIG. 8 is a diagram illustrating a schematic configuration of an uplink time frame from the mobile station apparatus 5 to the base station apparatus 3 and the RRH 4 according to the embodiment of the present invention.
  • the horizontal axis represents the time domain
  • the vertical axis represents the frequency domain.
  • An uplink time frame is a unit for resource allocation and the like, and is a pair of physical resource blocks (uplink physical resource block pair; UL PRB pair) consisting of a frequency band and a time zone of a predetermined width of the uplink. ).
  • One UL PRB pair is composed of two uplink PRBs (uplink physical resource block; referred to as UL PRB) that are continuous in the uplink time domain.
  • one UL PRB is composed of 12 subcarriers (referred to as uplink subcarriers) in the uplink frequency domain, and 7 SC-FDMA (Single- Carrier (Frequency (Division (Multiple Access)) symbol.
  • An uplink system band (referred to as an uplink system band) is an uplink communication band of the base station apparatus 3 and the RRH 4.
  • the uplink system bandwidth (referred to as an uplink system bandwidth) is composed of a frequency bandwidth of 20 MHz, for example.
  • the uplink system band a plurality of UL PRB pairs are arranged according to the uplink system bandwidth.
  • the uplink system band having a frequency bandwidth of 20 MHz is composed of 110 UL PRB pairs.
  • a slot composed of seven SC-FDMA symbols (referred to as an uplink slot) and a subframe composed of two uplink slots (uplink subframe). Called).
  • a unit composed of one uplink subcarrier and one SC-FDMA symbol is referred to as a resource element (referred to as an uplink resource element).
  • each uplink subframe at least PUSCH, PUCCH, PUSCH and PUCCH are demodulated (estimation of propagation path fluctuation) (UL RS (DM RS)).
  • UL RS demodulated (estimation of propagation path fluctuation)
  • PRACH is arranged in any uplink subframe.
  • UL RS (SRS) used for measuring channel quality, synchronization loss, and the like is arranged in any uplink subframe.
  • One PUSCH is composed of one or more UL PRB pairs.
  • One PUCCH has a symmetrical relationship in the frequency domain within the uplink system band, and is composed of two UL PRBs located in different uplink slots. For example, in FIG. 8, the UL PRB having the lowest frequency in the first uplink slot and the UL PRB having the highest frequency in the second uplink slot in the uplink subframe are used for the PUCCH.
  • One PRB pair is configured.
  • the first PDCCH is configured by a plurality of control channel elements (CCE).
  • the number of CCEs used in each downlink system band includes the downlink system bandwidth, the number of OFDM symbols constituting the first PDCCH, and the number of transmission antennas of the base station apparatus 3 (or RRH4) used for communication.
  • the CCE is composed of a plurality of downlink resource elements.
  • FIG. 9 is a diagram illustrating a logical relationship between the first PDCCH and the CCE of the communication system 1 according to the embodiment of the present invention.
  • the CCE used between the base station apparatus 3 (or RRH 4) and the mobile station apparatus 5 is assigned a number for identifying the CCE.
  • the CCE numbering is performed based on a predetermined rule.
  • CCE t indicates the CCE of the number t.
  • the first PDCCH is configured by a set (CCE Aggregation) composed of a plurality of CCEs.
  • the number of CCEs constituting this set is hereinafter referred to as “CCE set number” (CCE aggregation number).
  • the CCE aggregation number configuring the first PDCCH is set in the base station apparatus 3 according to the coding rate set in the first PDCCH and the number of bits of DCI included in the first PDCCH.
  • a set of n CCEs is hereinafter referred to as “CCE aggregation n”.
  • the base station apparatus 3 configures the first PDCCH with one CCE (CCE aggregation 1), configures the first PDCCH with two CCEs (CCE aggregation 2), and four CCEs.
  • the first PDCCH is configured by (CCE aggregation 4), or the first PDCCH is configured by eight CCEs (CCE aggregation 8).
  • the first PDCCH candidate (PDCCH candidate) is a target on which the mobile station apparatus 5 performs decoding detection of the first PDCCH, and the first PDCCH candidate is configured independently for each CCE aggregation number.
  • the first PDCCH candidate configured for each CCE aggregation number includes one or more different CCEs.
  • the number of first PDCCH candidates is set independently for each CCE aggregation number.
  • the first PDCCH candidate configured for each CCE aggregation number includes CCEs having consecutive numbers.
  • the mobile station apparatus 5 performs the first PDCCH decoding detection for the number of first PDCCH candidates set for each CCE aggregation number.
  • the first set of PDCCH candidates is also referred to as a search space.
  • a plurality of downlink resource elements constituting a CCE is configured by nine resource element groups (also referred to as REG and mini-CCE). In other words, CCEs are arranged in nine resource element groups.
  • the resource element group is composed of a plurality of downlink resource elements. For example, one resource element group is composed of four downlink resource elements.
  • FIG. 10 is a diagram illustrating an arrangement example of resource element groups in the downlink radio frame of the communication system 1 according to the embodiment of the present invention.
  • the resource element group used for the first PDCCH is shown, and illustrations and descriptions of unrelated parts (PDSCH, PCFICH, second PHICH, second PDCCH, UE-specific RS, CSI-RS) are omitted.
  • the first PDCCH is composed of first to third OFDM symbols, and downlink reference signals (R0, R1) corresponding to CRSs of two transmission antennas (antenna port 0, antenna port 1) are provided. It shows about the case where it arranges.
  • the vertical axis represents the frequency domain
  • the horizontal axis represents the time domain.
  • one resource element group is configured by four adjacent downlink resource elements in the same OFDM symbol frequency region.
  • FIG. 10 shows that the downlink resource element to which the same code
  • resource element R0 (downlink reference signal for antenna port 0) and R1 (downlink reference signal for antenna port 1) in which downlink reference signals are arranged are skipped to form a resource element group.
  • FIG. 11 is a schematic configuration of a region where the second PDCCH may be arranged in the communication system 1 according to the embodiment of the present invention (hereinafter, referred to as a second PDCCH region for simplification of description). It is a figure which shows an example.
  • the base station device 3 configures (sets and arranges) a plurality of second PDCCH regions (second PDCCH region 1, second PDCCH region 2, and second PDCCH region 3) in the downlink system band. Can do.
  • One second PDCCH region is composed of one or more DL PRB pairs.
  • one second PDCCH region is composed of a plurality of DL PRB pairs, it may be composed of DL PRB pairs dispersed in the frequency domain, or may be composed of DL PRB pairs that are continuous in the frequency domain.
  • the base station device 3 can configure the second PDCCH region for each of the plurality of mobile station devices 5.
  • Different transmission methods are set for the arranged signals for each of the second PDCCH regions. For example, for a certain second PDCCH region, precoding processing is applied to a signal to be arranged. For example, a precoding process is not applied to a signal arranged for a certain second PDCCH region. In the second PDCCH region where the precoding process is applied to the arranged signal, the same precoding process can be applied to the second PDCCH and the UE-specific RS in the DL PRB pair. In the second PDCCH region where precoding processing is applied to the arranged signals, precoding processing applied to the second PDCCH and UE-specific RS is different in different precoding between different DL PRB pairs. Processing (different precoding vectors applied) (different precoding matrices applied) may be applied.
  • FIG. 12 is a diagram illustrating a logical relationship between the second PDCCH and the E-CCE of the communication system 1 according to the embodiment of the present invention.
  • the E-CCE used between the base station apparatus 3 (or RRH 4) and the mobile station apparatus 5 is assigned a number for identifying the E-CCE.
  • the E-CCE numbering is performed based on a predetermined rule.
  • E-CCE t indicates the E-CCE of number t.
  • the second PDCCH is configured by a set of a plurality of E-CCEs (E-CCE Aggregation).
  • E-CCE aggregation number The number of E-CCEs constituting this set is hereinafter referred to as “E-CCE aggregation number” (E-CCE aggregation number).
  • E-CCE aggregation number the E-CCE aggregation number configuring the second PDCCH is set in the base station apparatus 3 according to the coding rate set in the second PDCCH and the number of bits of DCI included in the second PDCCH.
  • E-CCE aggregation n a set of n E-CCEs.
  • the base station apparatus 3 configures a second PDCCH with one E-CCE (E-CCE aggregation 1), or configures a second PDCCH with two E-CCEs (E-CCE). aggregation 2)
  • the second PDCCH is configured by four E-CCEs (E-CCE aggregation 4), or the second PDCCH is configured by eight E-CCEs (E-CCE aggregation 8) .
  • the second PDCCH candidate (E-PDCCH candidate) is a target on which the mobile station apparatus 5 performs decoding detection of the second PDCCH, and the second PDCCH candidate is configured independently for each E-CCE aggregation number. .
  • the second PDCCH candidate configured for each E-CCE aggregation number is composed of one or more different E-CCEs.
  • the number of second PDCCH candidates is independently set for each E-CCE aggregation number.
  • the second PDCCH candidate configured for each E-CCE aggregation number includes E-CCEs with consecutive numbers or E-CCEs with non-consecutive numbers.
  • the mobile station apparatus 5 performs second PDCCH decoding detection on the number of second PDCCH candidates set for each E-CCE aggregation number.
  • the second set of PDCCH candidates is also referred to as a search space.
  • the number of E-CCEs configured in the second PDCCH region depends on the number of DL PRB pairs that configure the second PDCCH region.
  • the amount of resources (number of resource elements) supported by one E-CCE is the resource that can be used for the second PDCCH signal within one DL PRB pair (downlink reference signal, first
  • the resource element used for PDCCH (excluding resource elements) is substantially equal to the amount divided into four.
  • one second PDCCH region may be configured by only one slot of the downlink subframe or may be configured by a plurality of PRBs.
  • the second PDCCH region may be configured independently of the first slot and the second slot in the downlink subframe.
  • the second PDCCH region is mainly described in the case where the second PDCCH region is configured by a plurality of DL PRB pairs in a downlink subframe. It is not limited to such cases.
  • FIG. 13 is a diagram illustrating an example of a configuration of a region (region, resource) according to the embodiment of this invention.
  • the resources constituting the region are shown, and illustration and description of unrelated parts (PDSCH, first PDCCH) are omitted.
  • one DL PRB pair is shown.
  • the second PDCCH is composed of OFDM symbols from the 4th to the 14th in the 1st slot of the downlink subframe, and CRS (R0, R1)
  • CRS R0, R1
  • D1 UE-specific RS
  • the vertical axis represents the frequency domain
  • the horizontal axis represents the time domain.
  • a resource that is divided into four resources that can be used for the second PDCCH signal in the DL PRB pair is configured as one area.
  • a resource obtained by dividing a DL PRB pair resource into four in the frequency domain is configured as one region.
  • a resource divided for every three subcarriers in the DL PRB pair is configured as one area.
  • E-CCEs in the DL PRB pair are numbered in ascending order from E-CCEs including subcarriers that are low in the frequency domain.
  • FIG. 14 is a diagram showing an example of the configuration of the E-CCE and the localized E-PDCCH according to the embodiment of the present invention.
  • the second PDCCH is composed of the fourth to fourteenth OFDM symbols in the downlink subframe.
  • the vertical axis represents the frequency domain
  • the horizontal axis represents the time domain.
  • a certain E-CCE is composed of two E-CCEs (for example, E-CCE 2151) from the smaller number (region, lower in the frequency domain) of a region (region, resource) in a certain DL PRB pair. Area 2101 and area 2102).
  • a certain E-CCE is composed of two E-CCEs with the larger number of regions in a certain DL PRB pair (high in the frequency region) (for example, E-CCE 2152 is composed of region 2103 and region 2104). ing).
  • FIG. 15 is a diagram showing an example of a configuration of E-CCE and Distributed E-PDCCH according to the embodiment of the present invention.
  • the second PDCCH is composed of the fourth to fourteenth OFDM symbols in the downlink subframe.
  • the vertical axis represents the frequency domain
  • the horizontal axis represents the time domain.
  • a certain E-CCE is composed of areas in different DL PRB pairs.
  • PHICH is used for transmission of ACK / NACK.
  • the base station apparatus 3 transmits ACK / NACK with respect to the transport block received by PUSCH scheduled by the downlink control information transmitted using PDCCH by 1st PHICH.
  • the base station apparatus 3 transmits ACK / NACK with respect to the transport block received by PUSCH scheduled by the downlink control information transmitted using 2nd PDCCH by 2nd PHICH.
  • the mobile station apparatus 5 determines the PHICH resource in the subframe n + 4 for the PUSCH transmission scheduled in the subframe n.
  • the mobile station apparatus 5 receives the determined PHICH resource signal, and decodes ACK or NACK corresponding to the PUSCH from the received signal.
  • the base station apparatus 3 arranges a plurality of PHICHs (first PHICH, second PHICH) in the same set of resource elements.
  • a plurality of PHICHs arranged in the same set of resource elements constitute a PHICH group.
  • PHICHs within the same PHICH group are separated through different sequences.
  • a PHICH resource is specified by a pair of a PHICH group number n group PHICH and a sequence index n seq PHICH within the group.
  • the number of PHICH groups N group PHICH is calculated based on equation (1).
  • a PHICH group composed of the first PHICH is also referred to as a first PHICH group.
  • a PHICH group including the second PHICH is also referred to as a second PHICH group.
  • the number of the first PHICH group is also referred to as N group PHICH, 1 .
  • the number of the second PHICH group is also referred to as N group PHICH, 2 .
  • N g, 1 and N g, 2 are values notified by the base station device 3 to the mobile station device 5.
  • the value of N g, 1 and the value of N g, 2 are selected from ⁇ 1/6, 1/2, 1, 2 ⁇ .
  • the base station apparatus 3 transmits information indicating the value of N g, 1 using PBCH.
  • the base station apparatus 3 transmits the MIB including information indicating the value of N g, 1 .
  • the base station apparatus 3 transmits information indicating the value of N g, 1 using PDSCH.
  • the base station device 3 transmits the dedicated radio resource control information for the mobile station device 5 including information indicating the value of N g, 1 .
  • the base station apparatus 3 transmits information indicating the value of N g, 2 using PBCH.
  • the base station apparatus 3 transmits the MIB including information indicating the value of Ng, 2 .
  • the base station apparatus 3 transmits information indicating the value of N g, 2 using PDSCH.
  • the base station apparatus 3 transmits the dedicated radio resource control information for the mobile station apparatus 5 including information indicating the value of Ng, 2 .
  • N DL RB is the number of physical resource blocks included in the downlink bandwidth.
  • the base station apparatus 3 transmits information indicating the value of N DL RB using PBCH.
  • the base station apparatus 3 transmits the MIB including information indicating the value of N DL RB .
  • the base station apparatus 3 transmits information indicating the value of N DL RB using PDSCH.
  • the base station apparatus 3 transmits the dedicated radio resource control information for the mobile station apparatus 5 including information indicating the value of N DL RB .
  • the number N UL RB of physical resource blocks included in the uplink bandwidth is used instead of the number of physical resource blocks N DL RB included in the downlink bandwidth. May be used.
  • the base station apparatus 3 transmits information indicating the value of N UL RB using PDSCH.
  • the base station apparatus 3 transmits the dedicated radio resource control information for the mobile station apparatus 5 including information indicating the value of N UL RB .
  • the number of physical resource blocks included in the uplink bandwidth N UL RB is used instead of the number of physical resource blocks included in the downlink bandwidth N DL RB.
  • the value of N g, 1 may be fixed.
  • FIG. 16 is a diagram illustrating an example of signal processing of ACK / NACK transmitted using the PHICH according to the embodiment of the present invention.
  • ACK is expressed by ⁇ 1>.
  • NACK is expressed by ⁇ 0>.
  • the base station apparatus 3 generates a 3-bit sequence ⁇ 0, 0, 0> by encoding NACK ⁇ 0>.
  • the base station apparatus 3 generates a 3-bit sequence ⁇ 1, 1, 1> by encoding ACK ⁇ 1> (step S1000).
  • the base station apparatus 3 generates three modulation symbols ⁇ z (0), z (1), z (2)> by performing BPSK modulation on the sequence generated in step S1000 (step S1002).
  • the base station apparatus 3 multiplies and scrambles the modulation symbol generated in step S1002 to obtain a modulation symbol sequence ⁇ d (0), d (1),..., D (M symb ⁇ 1)>.
  • Generate step S1004.
  • the base station apparatus 3 generates the modulation symbol sequence based on the equation (2).
  • the first PHICH modulation symbol sequence ⁇ d (0), d (1),..., D (M symb -1)> has a length of 12.
  • the second PHICH modulation symbol sequence ⁇ d (0), d (1),..., D (M symb ⁇ 1)> has a length of 3.
  • [X] mod [Y] is a function that calculates the remainder when [X] is divided by [Y].
  • floor () is a function that calculates the largest integer that is smaller than the number in parentheses.
  • c () is a cell-specific scrambling sequence.
  • c () is a pseudo-random sequence in which an initial value is set based on the physical layer cell ID and the slot number. That is, the PHICH modulation symbol is scrambled by c ().
  • FIG. 17 is a diagram illustrating an example of a sequence w to be multiplied by a PHICH modulation symbol according to the embodiment of the present invention.
  • the sequence index n seq PHICH corresponds to the PHICH number in the PHICH group.
  • N PHICH SF is a spreading factor size used for the modulation of PHICH.
  • the spreading factor size for the first PHICH is 4.
  • the spreading factor size for the second PHICH is 1.
  • the sequence length (sequence length) of w () multiplied by the modulation symbol of the first PHICH is 4.
  • the sequence length (sequence length) of w () multiplied by the modulation symbol of the second PHICH is 1.
  • the spreading factor size for the second PHICH is different from the spreading factor size for the first PHICH. That is, in the embodiment of the present invention, the length of the sequence w () multiplied by the second PHICH modulation symbol is different from the length of the sequence w () multiplied by the first PHICH modulation symbol.
  • sequence length of w () multiplied by the second PHICH modulation symbol may be two instead of one. That is, the second PHICH spreading factor size may be two.
  • a sequence w () having a spreading factor size of 2 is ⁇ +1, +1>, ⁇ +1, ⁇ 1>, ⁇ + j, + j>, ⁇ + j, ⁇ j>.
  • the sequence w () is an orthogonal sequence.
  • a certain sequence w () and another certain sequence w () having the same length as the certain sequence w () are orthogonal in the code domain.
  • a certain sequence w () and another certain sequence w () having the same length as the certain sequence w () are orthogonal in the complex plane region.
  • the base station apparatus 3 arranges the modulation symbol series that has been multiplied and scrambled by the series w in step S1004 in the resource element (step S1006).
  • FIG. 18 is a diagram showing an example of arrangement of resource elements in the first PHICH group according to the embodiment of the present invention.
  • the vertical axis represents the frequency domain.
  • FIG. 18 shows only the first OFDM symbol in the subframe.
  • squares hatched with diagonal lines indicate resource elements in which CRSs are arranged.
  • a square with a number i indicates a resource element in which the i-th first PHICH group is arranged.
  • thick squares indicate resource element groups.
  • a single first PHICH group is arranged in three resource element groups.
  • the three resource element groups in which the same first PHICH group is arranged are arranged so that the intervals are even in the frequency domain.
  • a plurality of first PHICH groups with adjacent numbers are arranged in adjacent resource element groups in the frequency domain.
  • the first PHICH group is arranged in a resource element group other than the resource element group in which PCFICH is arranged.
  • the resource element in which the first PHICH (group) is arranged is also referred to as a first resource.
  • the first resource is a resource of the first PDCCH region.
  • FIG. 19 is a diagram showing an example of arrangement of resource elements in the second PHICH group according to the embodiment of the present invention.
  • the vertical axis indicates the frequency domain.
  • FIG. 19 shows only the fourth OFDM symbol in the subframe.
  • a square with a number i indicates a resource element in which an i-th second PHICH group is arranged.
  • the second PHICH group is arranged in the resource element of the second PDCCH region.
  • a single second PHICH group is arranged in three resource elements.
  • the three resource elements in which the same second PHICH group is arranged are non-contiguous in the frequency domain. Further, the three resource elements in which the same second PHICH group is arranged are resource elements constituting different physical resource blocks.
  • a plurality of second PHICH groups having adjacent numbers are arranged in adjacent resource elements in the frequency domain.
  • the resource element in which the second PHICH (group) is arranged is also referred to as a second resource.
  • the second resource is a resource of the second PDCCH region.
  • PHICH resources (PHICH group number n group PHICH and sequence index n seq PHICH in the PHICH group) corresponding to PUSCH transmission are specified based on Equations (3) and (4).
  • the base station apparatus 3 transmits ACK or NACK to the mobile station apparatus 5 using the PHICH resource specified based on the expressions (3) and (4). Also, the mobile station apparatus 5 receives ACK or NACK from the base station apparatus 3 using the PHICH resource specified based on the expressions (3) and (4).
  • I PRB_RA is the lowest physical resource block index in the first slot of the PUSCH transmission.
  • n DMRS is a value determined from the value of information bits arranged in “cyclic shift for DMRS field” in the most recent downlink control information to which the PUSCH transmission relates. is there.
  • Information bits arranged in “cyclic shift for DMRS field” are used to notify mobile station apparatus 5 of the value of cyclic shift applied to DMRS transmitted together with the PUSCH. Is done.
  • the number of the second PHICH group is 25, the lowest physical resource block index in the first slot of PUSCH transmission is 30, and “cyclic shift field for DMRS (cyclic shift for DMRS field)”
  • the value corresponding to the information bits to be arranged is 1, the number of the second PHICH group corresponding to the PUSCH transmission is 6, and the sequence index in the second PHICH group is 0.
  • FIG. 1 is a schematic block diagram showing a configuration of a mobile station apparatus 5 according to an embodiment of the present invention.
  • the mobile station apparatus 5 includes an upper layer processing unit 101, a control unit 103, a receiving unit 105, a transmitting unit 107 and a transmission / reception antenna 109.
  • the upper layer processing unit 101 includes a radio resource control unit 1011, a scheduling information interpretation unit 1013, and a PHICH resource determination unit 1015.
  • the reception unit 105 includes a decoding unit 1051, a demodulation unit 1053, a demultiplexing unit 1055, a radio reception unit 1057, and a channel measurement unit 1059.
  • the transmission unit 107 includes an encoding unit 1071, a modulation unit 1073, a multiplexing unit 1075, a radio transmission unit 1077, and an uplink reference signal generation unit 1079.
  • the upper layer processing unit 101 outputs uplink data (transport block) generated by a user operation or the like to the transmission unit 107.
  • the upper layer processing unit 101 includes a medium access control (MAC: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: RLC) layer, and radio resource control. Process the (Radio Resource Control: RRC) layer.
  • MAC Medium Access Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • RRC Radio Resource Control
  • the radio resource control unit 1011 included in the upper layer processing unit 101 manages various setting information of the own device. Also, the radio resource control unit 1011 generates information arranged in each uplink channel and outputs the information to the transmission unit 107.
  • the scheduling information interpretation unit 1013 provided in the higher layer processing unit 101 interprets information used for scheduling of physical channels (PUSCH, PDSCH, etc.) received via the reception unit 105.
  • the scheduling information interpretation unit 1013 generates control information to control the reception unit 105 and the transmission unit 107 based on the result of interpreting the information, and outputs the control information to the control unit 103.
  • the PHICH resource determination unit 1015 included in the higher layer processing unit 101 determines a PHICH resource corresponding to the PUSCH transmitted by the mobile station device 5 based on the equations (3) and (4).
  • the PHICH resource determination unit 1015 determines a first PHICH resource corresponding to the PUSCH from the first PHICH resources.
  • the PHICH resource determining unit 1015 determines a second PHICH resource corresponding to the PUSCH from the second PHICH resources.
  • the control unit 103 generates a control signal for controlling the receiving unit 105 and the transmitting unit 107 based on the control information from the higher layer processing unit 101. Control unit 103 outputs the generated control signal to receiving unit 105 and transmitting unit 107 to control receiving unit 105 and transmitting unit 107.
  • the receiving unit 105 separates, demodulates, and decodes the received signal received from the base station apparatus 3 via the transmission / reception antenna 109 according to the control signal input from the control unit 103, and sends the decoded information to the upper layer processing unit 101. Output.
  • the radio reception unit 1057 converts the downlink signal received via the transmission / reception antenna 109 into an intermediate frequency (down-conversion: down covert), removes unnecessary frequency components, and maintains the signal level appropriately. Then, the amplification level is controlled, quadrature demodulation is performed based on the in-phase component and the quadrature component of the received signal, and the quadrature demodulated analog signal is converted into a digital signal.
  • the radio reception unit 1057 removes a portion corresponding to a guard interval (Guard Interval: GI) from the converted digital signal, and performs a fast Fourier transform (FFT Fourier Transform: FFT) on the signal from which the guard interval has been removed. Extract the region signal.
  • GI Guard Interval
  • FFT fast Fourier transform
  • the demultiplexing unit 1055 separates the extracted signals into PHICH, PDCCH, PDSCH, and downlink reference signals. Further, demultiplexing section 1055 compensates the propagation path of PHICH, PDCCH, and PDSCH from the estimated propagation path value input from channel measurement section 1059. Also, the demultiplexing unit 1055 outputs the demultiplexed downlink reference signal to the channel measurement unit 1059.
  • the demodulator 1053 multiplies the PHICH by a corresponding sequence w to synthesize, demodulates the synthesized signal using a BPSK (Binary Phase Shift Shift Keying) modulation method, and outputs the demodulated signal to the decoding unit 1051.
  • Decoding section 1051 decodes the PHICH addressed to the own apparatus, and outputs the decoded HARQ indicator to higher layer processing section 101.
  • Demodulation section 1053 demodulates the QPSK modulation scheme for PDCCH and outputs the result to decoding section 1051.
  • Decoding section 1051 attempts blind decoding of PDCCH, and when blind decoding is successful, decodes downlink control information and outputs RNTI included in downlink control information to higher layer processing section 101.
  • the demodulation unit 1053 demodulates the modulation scheme notified by downlink assignment such as QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, and the like, and outputs the result to the decoding unit 1051. .
  • the decoding unit 1051 performs decoding based on the information regarding the coding rate notified by the downlink control information, and outputs the decoded downlink data (transport block) to the higher layer processing unit 101.
  • the channel measurement unit 1059 measures the downlink path loss from the downlink reference signal input from the demultiplexing unit 1055, and outputs the measured path loss to the higher layer processing unit 101.
  • Channel measurement section 1059 calculates channel state information from the downlink reference signal input from demultiplexing section 1055, and outputs the calculated channel state information to higher layer processing section 101. Also, channel measurement section 1059 calculates an estimated value of the downlink propagation path from the downlink reference signal, and outputs it to demultiplexing section 1055.
  • the transmission unit 107 generates an uplink reference signal according to the control signal input from the control unit 103, encodes and modulates the uplink data (transport block) input from the higher layer processing unit 101, PUCCH, The PUSCH and the generated uplink reference signal are multiplexed and transmitted to the base station apparatus 3 via the transmission / reception antenna 109.
  • the encoding unit 1071 performs encoding such as convolutional encoding and block encoding on the uplink control information input from the higher layer processing unit 101.
  • the encoding unit 1071 performs turbo encoding based on information used for PUSCH scheduling.
  • the modulation unit 1073 modulates the coded bits input from the coding unit 1071 using a modulation method notified by downlink control information such as BPSK, QPSK, 16QAM, 64QAM, or a modulation method predetermined for each channel.
  • Modulation section 1073 determines the number of spatially multiplexed data sequences based on information used for PUSCH scheduling, and uses MIMO SM to transmit a plurality of uplink data transmitted on the same PUSCH to a plurality of uplink data. Mapping to a sequence and precoding the sequence.
  • the uplink reference signal generation unit 1079 is a physical layer cell identifier for identifying the base station apparatus 3 (referred to as physical cell identity: PCI, Cell ID, etc.), a bandwidth for arranging the uplink reference signal, and an uplink grant. Based on the notified cyclic shift, the value of the parameter for generating the DMRS sequence, etc., a sequence determined by a predetermined rule is generated.
  • the multiplexing unit 1075 rearranges the PUSCH modulation symbols in parallel according to the control signal input from the control unit 103, and then performs a discrete Fourier transform (Discrete-Fourier-Transform: DFT). Also, multiplexing section 1075 multiplexes the PUCCH and PUSCH signals and the generated uplink reference signal for each transmission antenna port. That is, multiplexing section 1075 arranges the PUCCH and PUSCH signals and the generated uplink reference signal in the resource element for each transmission antenna port.
  • DFT discrete Fourier transform
  • Radio transmission section 1077 performs inverse fast Fourier transform (inverse Fast Transform: IFFT) on the multiplexed signal, performs SC-FDMA modulation, and adds a guard interval to the SC-FDMA-modulated SC-FDMA symbol
  • IFFT inverse Fast Transform
  • a baseband digital signal converting the baseband digital signal to an analog signal, generating an in-phase component and a quadrature component of an intermediate frequency from the analog signal, removing an extra frequency component for the intermediate frequency band,
  • the intermediate frequency signal is converted to a high frequency signal (up-conversion: up convert), an extra frequency component is removed, the power is amplified, and output to the transmission / reception antenna 109 for transmission.
  • FIG. 2 is a schematic block diagram showing the configuration of the base station apparatus 3 according to the embodiment of the present invention.
  • the base station apparatus 3 includes an upper layer processing unit 301, a control unit 303, a reception unit 305, a transmission unit 307, and a transmission / reception antenna 309.
  • the upper layer processing unit 301 includes a radio resource control unit 3011, a scheduling unit 3013, and a PHICH resource control unit 3015.
  • the reception unit 305 includes a decoding unit 3051, a demodulation unit 3053, a demultiplexing unit 3055, a wireless reception unit 3057, and a channel measurement unit 3059.
  • the transmission unit 307 includes an encoding unit 3071, a modulation unit 3073, a multiplexing unit 3075, a radio transmission unit 3077, and a downlink reference signal generation unit 3079.
  • the upper layer processing unit 301 includes a medium access control (MAC: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: RLC) layer, a radio resource control (Radio). Resource (Control: RRC) layer processing. Further, upper layer processing section 301 generates control information for controlling receiving section 305 and transmitting section 307 and outputs the control information to control section 303.
  • MAC Medium Access Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • Radio Radio Resource
  • the radio resource control unit 3011 provided in the upper layer processing unit 301 generates downlink data (transport block), RRC signal, MAC CE (Control Element) arranged in the downlink PDSCH, or acquires it from the upper node. And output to the transmission unit 307. Further, the radio resource control unit 3011 manages various setting information of each mobile station device 5. For example, the radio resource control unit 3011 performs cell management, periodic channel state information report management, and the like.
  • the scheduling unit 3013 provided in the higher layer processing unit 301 assigns a frequency, subframe, and physical channel (PDSCH) to which physical channels (PDSCH and PUSCH) are assigned based on channel estimation values and channel state information input from the channel measurement unit 3059. And the PUSCH) coding rate, modulation scheme, transmission power, and the like. Based on the scheduling result, scheduling section 3013 generates control information for controlling receiving section 305 and transmitting section 307 and outputs the control information to control section 303. The scheduling unit 3013 generates information used for physical channel (PDSCH and PUSCH) scheduling based on the scheduling result. The scheduling unit 3013 outputs the generated information to the transmission unit 307. Scheduling section 3013 generates ACK or NACK for the transport block received using PUSCH, and outputs the generated ACK or NACK to transmitting section 307.
  • the PHICH resource control unit 3015 included in the upper layer processing unit 301 controls the first PHICH resource and the second PHICH resource.
  • the PHICH resource control unit 3015 controls the number of first PHICH groups and / or the number of second PHICH resource groups.
  • the PHICH resource control unit 3015 controls the PHICH resource used for transmission of ACK or NACK for the received transport block.
  • the control unit 303 generates a control signal for controlling the reception unit 305 and the transmission unit 307 based on the control information from the higher layer processing unit 301.
  • the control unit 303 outputs the generated control signal to the reception unit 305 and the transmission unit 307 and controls the reception unit 305 and the transmission unit 307.
  • the receiving unit 305 separates, demodulates, and decodes the received signal received from the mobile station apparatus 5 via the transmission / reception antenna 309 according to the control signal input from the control unit 303, and outputs the decoded information to the higher layer processing unit 301.
  • the radio reception unit 3057 converts an uplink signal received via the transmission / reception antenna 309 into an intermediate frequency (down-conversion: down covert), removes unnecessary frequency components, and appropriately maintains the signal level. In this way, the amplification level is controlled, and based on the in-phase and quadrature components of the received signal, quadrature demodulation is performed, and the quadrature demodulated analog signal is converted into a digital signal.
  • the wireless receiver 3057 removes a portion corresponding to a guard interval (Guard Interval: GI) from the converted digital signal.
  • the radio reception unit 3057 performs fast Fourier transform (FFT) on the signal from which the guard interval is removed, extracts a frequency domain signal, and outputs the signal to the demultiplexing unit 3055.
  • FFT fast Fourier transform
  • the demultiplexing unit 1055 demultiplexes the signal input from the radio receiving unit 3057 into signals such as PUCCH, PUSCH, and uplink reference signal. This separation is performed based on radio resource allocation information included in the uplink grant that is determined in advance by the radio resource control unit 3011 by the base station device 3 and notified to each mobile station device 5.
  • demultiplexing section 3055 compensates for the propagation paths of PUCCH and PUSCH from the propagation path estimation value input from channel measurement section 3059. Further, the demultiplexing unit 3055 outputs the separated uplink reference signal to the channel measurement unit 3059.
  • the demodulation unit 3053 performs inverse discrete Fourier transform (Inverse Discrete Fourier Transform: IDFT) of PUSCH, acquires modulation symbols, and performs BPSK (Binary Shift Keying), QPSK, 16QAM, PUCCH and PUSCH modulation symbols, respectively.
  • IDFT Inverse Discrete Fourier Transform
  • the received signal is demodulated using a predetermined modulation scheme such as 64QAM, or a modulation scheme that the own device has previously notified to each mobile station device 5 with an uplink grant.
  • the demodulating unit 3053 is the same by using MIMO SM based on the number of spatially multiplexed sequences notified in advance to each mobile station device 5 using an uplink grant and information indicating precoding performed on the sequences.
  • the modulation symbols of a plurality of uplink data transmitted on the PUSCH are separated.
  • the decoding unit 3051 encodes the demodulated PUCCH and PUSCH encoded bits in a predetermined encoding method, in a predetermined encoding method, or in which the own device notifies the mobile station device 5 in advance with an uplink grant. Decoding is performed at a rate, and the decoded uplink data and uplink control information are output to the upper layer processing section 101. When PUSCH is retransmitted, decoding section 3051 performs decoding using the encoded bits held in the HARQ buffer input from higher layer processing section 301 and the demodulated encoded bits.
  • Channel measurement section 309 measures an estimated channel value, channel quality, and the like from the uplink reference signal input from demultiplexing section 3055 and outputs the result to demultiplexing section 3055 and higher layer processing section 301.
  • the transmission unit 307 generates a downlink reference signal according to the control signal input from the control unit 303, encodes and modulates the HARQ indicator, downlink control information, and downlink data input from the higher layer processing unit 301. Then, the PHICH, PDCCH, PDSCH, and downlink reference signal are multiplexed, and the signal is transmitted to the mobile station apparatus 5 via the transmission / reception antenna 309.
  • the encoding unit 3071 determines the HARQ indicator (ACK or NACK), downlink control information, and downlink data input from the higher layer processing unit 301 in advance, such as block encoding, convolutional encoding, and turbo encoding. Encoding is performed using the determined encoding method, or encoding is performed using the encoding method determined by the radio resource control unit 3011.
  • the modulation unit 3073 modulates the coded bits input from the coding unit 3071 with a modulation scheme determined in advance by the radio resource control unit 3011 such as BPSK, QPSK, 16QAM, and 64QAM.
  • the downlink reference signal generation unit 3079 uses, as a downlink reference signal, a sequence known by the mobile station device 5 that is obtained by a predetermined rule based on a physical layer cell identifier (PCI) for identifying the base station device 3 or the like. Generate.
  • the multiplexing unit 3075 multiplexes the modulated modulation symbol of each channel and the generated downlink reference signal. That is, multiplexing section 3075 arranges the modulated modulation symbol of each channel and the generated downlink reference signal in the resource element.
  • the wireless transmission unit 3077 performs inverse fast Fourier transform (Inverse Fast Fourier Transform: IFFT) on the multiplexed modulation symbols and the like, performs modulation in the OFDM scheme, adds a guard interval to the OFDM symbol that has been OFDM-modulated, and baseband
  • IFFT inverse Fast Fourier Transform
  • the baseband digital signal is converted to an analog signal, the in-phase and quadrature components of the intermediate frequency are generated from the analog signal, the extra frequency components for the intermediate frequency band are removed, and the intermediate-frequency signal is generated. Is converted to a high-frequency signal (up-conversion: up convert), an extra frequency component is removed, power is amplified, and output to the transmission / reception antenna 309 for transmission.
  • the mobile station device 3 transmits a transport block to the base station device 3 using PUSCH, and uses the first PHICH or the second PHICH to transmit the transport block.
  • ACK / NACK for the block is received from the base station apparatus 3.
  • the first PHICH is multiplied by a first sequence
  • the second PHICH is multiplied by a second sequence.
  • up to eight first PHICHs multiplied by different first sequences are arranged in the same first resource.
  • up to two second PHICHs multiplied by different second sequences are arranged in the same second resource.
  • the length of the first sequence is 4, and the length of the second sequence is 1.
  • the base station apparatus 3 can arrange
  • the base station apparatus 3 can apply beam forming to the second PHICH signal.
  • the mobile station apparatus 5 can demodulate the signal of the channel used for transmission / reception of ACK / NACK using UE-specific RS.
  • the mobile station apparatus 5 can efficiently multiplex PHICH by multiplying the first PHICH and the second PHICH by sequences of different lengths.
  • the region of the resource where the second PDCCH may be allocated is defined as the second PDCCH region. It is clear that the present invention can be applied if it has a similar meaning.
  • the mobile station device 5 is not limited to a mobile terminal, and the present invention may be realized by implementing the function of the mobile station device 5 in a fixed terminal.
  • the characteristic means of the present invention described above can also be realized by mounting and controlling functions in an integrated circuit.
  • the operation described in the embodiment of the present invention may be realized by a program.
  • the program that operates in the mobile station device 5 and the base station device 3 related to the present invention is a program (a program that causes a computer to function) that controls the CPU and the like so as to realize the functions of the above-described embodiments related to the present invention.
  • Information handled by these devices is temporarily stored in the RAM at the time of processing, then stored in various ROMs and HDDs, read out by the CPU, and corrected and written as necessary.
  • a semiconductor medium for example, ROM, nonvolatile memory card, etc.
  • an optical recording medium for example, DVD, MO, MD, CD, BD, etc.
  • a magnetic recording medium for example, magnetic tape, Any of a flexible disk etc.
  • the program when distributing to the market, can be stored and distributed on a portable recording medium, or transferred to a server computer connected via a network such as the Internet.
  • the storage device of the server computer is also included in the present invention.
  • LSI which is typically an integrated circuit.
  • Each functional block of the mobile station device 5 and the base station device 3 may be individually chipped, or a part or all of them may be integrated into a chip.
  • the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • an integrated circuit based on the technology can also be used.
  • Each functional block of the mobile station device 5 and the base station device 3 may be realized by a plurality of circuits.
  • Information and signals can be presented using a variety of different techniques and methods. For example, chips, symbols, bits, signals, information, commands, instructions, and data that may be referred to throughout the above description may be indicated by voltage, current, electromagnetic waves, magnetic or magnetic particles, optical or light particles, or combinations thereof .
  • DSPs digital signal processors
  • ASIC Application specific integrated circuit
  • FPGA field programmable gate array signal
  • a general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • the processor may also be implemented as a combination of computing devices. For example, a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors connected to a DSP core, or a combination of other such configurations.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any form of recording medium known in the art.
  • a typical recording medium may be coupled to the processor such that the processor can read information from, and write information to, the recording medium.
  • the recording medium may be integral to the processor.
  • the processor and the recording medium may be in the ASIC.
  • the ASIC can be in the mobile station device (user terminal). Or a processor and a recording medium may exist in the mobile station apparatus 5 as a discrete element.
  • the functions described can be implemented in hardware, software, firmware, or a combination thereof. If implemented by software, the functions may be maintained or transmitted as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both communication media and computer recording media including media that facilitate carrying a computer program from one place to another.
  • the recording medium may be any commercially available medium that can be accessed by a general purpose or special purpose computer.
  • such computer readable media may be RAM, ROM, EEPROM, CDROM or other optical disc media, magnetic disc media or other magnetic recording media, or general purpose or It can include media that can be accessed by a special purpose computer or general purpose or special purpose processor and used to carry or retain the desired program code means in the form of instructions or data structures.
  • any connection is also properly termed a computer-readable medium.
  • the software uses a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology such as infrared, wireless, or microwave
  • a website, server, or other remote source When transmitting from, these coaxial cables, fiber optic cables, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the definition of the medium.
  • the discs (disk, disc) used in the present specification include compact discs (CD), laser discs (registered trademark), optical discs, digital versatile discs (DVD), floppy (registered trademark) discs, and Blu-ray discs.
  • the disk generally reproduces data magnetically, while the disk optically reproduces data with a laser. Combinations of the above should also be included on the computer-readable medium.
  • Base station apparatus 4 (A to C) RRH 5 (A to C) Mobile station apparatus 101 Upper layer processing section 103 Control section 105 Reception section 107 Transmission section 301 Upper layer processing section 303 Control section 305 Reception section 307 Transmission section 1011 Radio resource control section 1013 Scheduling information interpretation section 1015 Channel state Information selection unit 3011 Radio resource control unit 3013 Scheduling unit 3015 Control information generation units 2101 to 2112 Regions 2151 to 2155 E-CCE 2201 to 2208 region 2251 to 2254 E-CCE

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

Abstract

L'invention concerne un ACK/NACK pour un bloc de transport provenant d'un dispositif de station de base au moyen d'un premier PHICH et d'un second PHICH, le premier PHICH étant multiplié par une première séquence et jusqu'à huit premiers PHICH ayant été multipliés par différentes premières séquences positionnées sur la même première ressource, le second PHICH étant multiplié par une seconde séquence et jusqu'à deux seconds PHICH étant multipliés par différentes secondes séquences positionnées sur la même ressource. La longueur de la première séquence est 4, et la longueur de la seconde séquence est 1.
PCT/JP2013/051709 2012-01-30 2013-01-28 Dispositif de station mobile, dispositif de station de base, procédé de communication, circuit intégré et système de communication WO2013115122A1 (fr)

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JP2012016200A JP5841439B2 (ja) 2012-01-30 2012-01-30 移動局装置、基地局装置、通信方法、集積回路および通信システム
JP2012-016200 2012-01-30

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010103964A1 (fr) * 2009-03-09 2010-09-16 株式会社エヌ・ティ・ティ・ドコモ Station de base radio

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010103964A1 (fr) * 2009-03-09 2010-09-16 株式会社エヌ・ティ・ティ・ドコモ Station de base radio

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NOKIA ET AL.: "PHICH resource mapping/ dimensioning for TDD", 3GPP RL-081453, 31 March 2008 (2008-03-31), XP050109870 *

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