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WO2013111843A1 - Dispositif station mobile, dispositif station de base et système de radiocommunication - Google Patents

Dispositif station mobile, dispositif station de base et système de radiocommunication Download PDF

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Publication number
WO2013111843A1
WO2013111843A1 PCT/JP2013/051541 JP2013051541W WO2013111843A1 WO 2013111843 A1 WO2013111843 A1 WO 2013111843A1 JP 2013051541 W JP2013051541 W JP 2013051541W WO 2013111843 A1 WO2013111843 A1 WO 2013111843A1
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WIPO (PCT)
Prior art keywords
station apparatus
mobile station
base station
mtc
resource
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PCT/JP2013/051541
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English (en)
Japanese (ja)
Inventor
和豊 王
立志 相羽
克成 上村
恭之 加藤
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Sharp Corp
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Sharp Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/22—Allocation of codes with a zero correlation zone
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • 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 signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0055—ZCZ [zero correlation zone]
    • H04J13/0059—CAZAC [constant-amplitude and zero auto-correlation]

Definitions

  • the present invention relates to a mobile station device, a base station device, and a radio communication system.
  • the third generation partnership project is the evolution of wireless access methods and wireless networks for cellular mobile communications (hereinafter referred to as “Long Term Evolution (LTE)” or “Evolved Universal Terrestrial Radio Access: EUTRA”). : 3GPP).
  • LTE Long Term Evolution
  • EUTRA Evolved Universal Terrestrial Radio Access
  • 3GPP 3rd Generation Partnership Project
  • ⁇ OFDM orthogonal frequency division multiplexing
  • SC-FDMA Single-Carrier Frequency Division Multiple Access
  • LTE Long Term Evolution
  • a base station apparatus is also called eNodeB (evolvedvolveNodeB)
  • UE User Equipment
  • LTE is a cellular communication system in which a plurality of areas covered by a base station apparatus are arranged in a cell shape.
  • the base station apparatus transmits a synchronization signal (Synchronization signal: SS) and a physical broadcast channel (Physical Broadcast Channel: PBCH) using 72 subcarriers in the center of the system band.
  • SS Synchronization signal
  • PBCH Physical Broadcast Channel
  • the mobile station apparatus performs cell search (initial cell search, standby cell search and in-communication cell search) using the synchronization signal, and performs carrier frequency offset synchronization, OFDM symbol timing synchronization, radio frame timing synchronization, and physical layer cell identifier.
  • PCI Physical-layer Cell Identity
  • the mobile station apparatus acquires a master information block (Master information block: MIB) using a physical broadcast channel.
  • the master information block includes information indicating the downlink system bandwidth of the cell, information indicating a system frame (radio frame) number (System Frame Number: SFN), and the like.
  • the mobile station apparatus After receiving the PBCH, acquires a plurality of system information blocks (System information block: SIB) using a physical downlink shared channel (Physical Downlink Shared Channel: PDSCH).
  • SIB System information block
  • PDSCH Physical Downlink Shared Channel
  • the SIB includes radio resource setting information common to a plurality of mobile station apparatuses.
  • the base station apparatus allocates a part of the downlink band of the cell to the PDSCH.
  • the base station apparatus transmits downlink control information (Downlink Control Information: DCI) used for scheduling of a single PDSCH using a single physical downlink control channel (Physical Downlink Control Channel: PDCCH).
  • DCI Downlink Control Information
  • the base station apparatus transmits downlink control information used for scheduling of PDSCH for transmitting SIB using PDCCH in a common search region (Common Search Space: CSS).
  • CSS is used for transmission of PDCCH common to all mobile station apparatuses, and all mobile station apparatuses monitor (monitor) PDCCH in CSS.
  • the mobile station apparatus sets a physical random access channel (Physical Random Access Channel: PRACH) based on the radio resource setting information included in the SIB.
  • PRACH Physical Random Access Channel
  • the mobile station apparatus starts a random access procedure and adjusts uplink transmission timing.
  • the mobile station apparatus transmits a connection request message to the base station apparatus, and starts an initial connection establishment procedure.
  • a technology in which a mobile station apparatus and a base station apparatus communicate using a plurality of cells (component carriers) having the same channel structure (cell aggregation: cell-aggregation, carrier aggregation: also called carrier-aggregation) Is used.
  • cell aggregation cell-aggregation
  • carrier aggregation also called carrier-aggregation
  • a mobile station apparatus and a base station apparatus can simultaneously transmit and receive on a plurality of physical channels using a plurality of cells.
  • a cell used by the base station apparatus for communication with the mobile station apparatus can be added.
  • Cost reduction methods such as reduction in the number of antenna ports / RF chains, reduction in transmission / reception data transfer rate, adoption of half-duplex frequency division multiplexing (Half-duplex Frequency Division Duplex) method, transmission power reduction, and extension of intermittent reception interval Proposed.
  • the maximum transmission / reception frequency bandwidth of the MTCUE is limited to a frequency bandwidth narrower than 20 MHz, for example, 1.4 MHz.
  • the base station apparatus transmission / reception method, mobile station apparatus transmission / reception method, and communication protocol are compatible with conventional LTE standard (LTE Release 8 and 9) and LTE-Advanced standard (LTE Release 10) compatible systems. No specific implementation method is presented.
  • the present invention has taken the following measures. That is, a mobile station device that supports machine type communication that communicates with a base station device, and monitors a physical downlink control channel in a common search region arranged in the center of the downlink band in the base station device, The common search area is arranged in a predetermined number of resource blocks based on a downlink bandwidth supported by the mobile station apparatus.
  • the mobile station apparatus is characterized by monitoring downlink control information accompanied by a random access identifier in the physical downlink control channel.
  • the mobile station apparatus is characterized by monitoring downlink control information accompanied with a temporary radio network identifier in the physical downlink control channel.
  • the mobile station apparatus is characterized by monitoring paging information in the physical downlink control channel.
  • a base station apparatus that communicates with a mobile station apparatus that supports machine type communication, and a physical downlink control channel is arranged in a common search region arranged in the center of the downlink band in the base station apparatus
  • the common search area is arranged in a predetermined number of resource blocks based on a downlink bandwidth supported by the mobile station apparatus.
  • the base station apparatus transmits downlink control information accompanied by a random access identifier to the mobile station apparatus in the physical downlink control channel.
  • the base station apparatus transmits downlink control information accompanied by a random access identifier to the mobile station apparatus in the physical downlink control channel.
  • the base station apparatus transmits paging information to the mobile station apparatus in the physical downlink control channel.
  • a wireless communication system in which a base station apparatus and a mobile station apparatus corresponding to machine type communication communicate with each other, wherein the base station apparatus is located in the center of a downlink band in the base station apparatus.
  • a physical downlink control channel is arranged, the mobile station apparatus monitors the physical downlink control channel, and the common search area is preliminarily determined based on a downlink bandwidth supported by the mobile station apparatus. It is characterized in that it is arranged in a prescribed number of resource blocks.
  • the mobile station apparatus communicates with the base station apparatus, and a resource defined exclusively for the mobile station apparatus corresponding to machine type communication is allocated by the base station apparatus, and the resource is used. And performing a random access procedure.
  • the resource includes scheduling information related to the random access of the mobile station apparatus corresponding to the machine type communication or sequence information related to the random access of the mobile station apparatus corresponding to the machine type communication. Yes.
  • the resource is allocated to the mobile station apparatus by the base station apparatus using a system information block.
  • a base station apparatus that communicates with a mobile station apparatus, wherein a resource defined exclusively for a mobile station apparatus that supports machine type communication is allocated to the mobile station apparatus, and the resource is used It is characterized by executing a random access procedure.
  • the resource includes scheduling information related to the random access of the mobile station apparatus corresponding to the machine type communication or sequence information related to the random access of the mobile station apparatus corresponding to the machine type communication. Yes.
  • the base station apparatus is characterized in that the resource is allocated to the mobile station apparatus using a system information block.
  • a wireless communication system in which a base station device and a mobile station device communicate with each other, wherein the base station device assigns a resource defined exclusively for a mobile station device corresponding to machine type communication to the mobile station.
  • the mobile station apparatus performs a random access procedure using the resource.
  • the mobile station device supports machine type communication that communicates with the base station device, and uses a physical uplink control channel arranged only at one end of the uplink band in the base station device, Link control information is transmitted to the base station apparatus.
  • a base station apparatus that communicates with a mobile station apparatus that supports machine type communication, and a physical uplink control channel that is arranged only at one end of an uplink band in the base station apparatus is transmitted to the mobile station apparatus. It is characterized by assigning.
  • a radio communication system in which a base station apparatus and a mobile station apparatus corresponding to machine type communication communicate with each other, wherein the base station apparatus is a physical station arranged only at one end of an uplink band in the base station apparatus.
  • An uplink control channel is allocated to the mobile station apparatus, and the mobile station apparatus transmits uplink control information to the base station apparatus using the physical uplink control channel.
  • a mobile station apparatus compatible with machine type communication can efficiently communicate.
  • FIG. 1 is a conceptual diagram of a wireless communication system according to the first embodiment of the present invention.
  • the wireless communication system includes a low-cost MTC mobile station apparatus (1A to 1C) compatible with the LTE-Advanced extended standard (LTE Release 11) related to the present invention, and the conventional LTE standard (LTE Release 8,9).
  • the low-cost MTC mobile station apparatus (1A to 1C) corresponding to the LTE-Advanced extended standard (LTE Release 11) is referred to as MTCUE1, the conventional LTE standard (LTE Release 8,9), and the LTE-Advanced standard (LTE Release 10).
  • the corresponding mobile station devices (2A to 2C) are referred to as UE1.
  • UE1 and UE1 are collectively referred to as mobile station apparatuses.
  • Base station apparatuses (3) corresponding to UE1 and MTCUE1 are collectively referred to as base station apparatuses.
  • MTCUE1 (also referred to as an MTC device or MTC terminal) includes user equipment provided for machine type communication (communication between machines).
  • MTCUE1 can communicate with an access network comprising multiple cells with different characteristics (eg, eNodeBs, home ⁇ eNodeBs, e-UTRA Relays).
  • FIG. 1 shows a downlink reference signal (Downlink Reference Signal: DLRS), a synchronization signal (Synchronization signal: SS), a physical broadcast channel (Physical Broadcast Channel: PBCH), in downlink radio communication from the base station apparatus to the UE1.
  • Physical Downlink Control Channel Physical Downlink Control Channel: PDCCH
  • Physical Downlink Shared Channel Physical Downlink Shared Channel
  • PDSCH Physical Control Format Indicator Channel
  • PCFICH Physical Control Format Indicator Channel
  • Physical Hybrid ARQ Indicator Channel Physical Hybrid ARQ Indicator Channel: PHICH
  • FIG. 1 also shows DLRS, SS, PBCH shared with UE1, physical downlink control channel (4) (MTC-PDCCH) compatible with MTCUE1, and MTCUE1 in downlink radio communication from the base station apparatus to MTCUE1.
  • MTC-PDSCH Physical downlink shared channel
  • MTCUE1-compatible physical control format indicator channel MTC-PCFICH
  • MTCUE1-compatible physical HARQ indicator channel MTC-PHICH.
  • FIG. 1 illustrates uplink reference signals (Uplink Reference Signal: ULS), physical uplink control channel (Physical Uplink Control Channel: PUCCH), and physical uplink shared in uplink radio communication from UE1 to the base station apparatus. It indicates that a channel (Physical Uplink Shared Channel: PUSCH) and a physical random access channel (Physical Random Access Channel: PRACH) are used.
  • ULS Uplink Reference Signal
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • FIG. 1 shows an uplink reference signal (MTC-Uplink-Reference Signal: MTC-ULRS) compatible with MTCUE1 and a physical uplink control channel (9) compatible with MTCUE1 in uplink radio communication from MTCUE1 to the base station apparatus.
  • MTC-Physical-Uplink-Control Channel MTC-PUCCH
  • MTCUE1-compatible physical uplink shared channel MTC-Physical-Uplink Shared Channel: MTC-PUSCH
  • MTCUE1-compatible physical random access channel (10) MTC-Physical-Random Access-Channel: MTC- PRACH
  • SS is used for UE to synchronize downlink frequency domain and time domain.
  • the downlink reference signal is used for the UE to synchronize the frequency domain and the time domain of the downlink, the UE is used to measure the reception quality of the downlink, or the UE uses the PDSCH or PDCCH propagation path. Used to make corrections.
  • the PBCH is a physical channel used for broadcasting a master information block (Master Information Block: MIB) that is system information commonly used by UEs in a cell.
  • MIB Master Information Block
  • PBCH is transmitted at intervals of 40 ms.
  • the timing at intervals of 40 ms is blind-detected at the UE.
  • the PBCH is retransmitted at 10 ms intervals.
  • the MIB includes essential physical layer information for receiving other system information such as a system bandwidth and a radio frame number (System Frame: SFN).
  • the PDCCH also includes downlink control information (Downlink Control Information: DCI) such as downlink assignment (also referred to as “Downlink Grant: DG” or “Downlink Grant: DG”) and uplink grant (Uplink Grant: UG). ) Is the physical channel used to transmit.
  • DCI Downlink Control Information
  • the downlink assignment includes information on modulation scheme and coding rate for PDSCH (Modulation & Coding Scheme: MCS), information indicating radio resource allocation, TPC command (Transmission Power Control Command) for PUCCH, and the like.
  • MCS Modulation & Coding Scheme
  • TPC command Transmission Power Control Command
  • the uplink grant includes information on modulation scheme and coding rate for PUSCH, information indicating radio resource allocation, TPC command for PUSCH, and the like.
  • a plurality of formats are defined in the downlink control information transmitted on the PDCCH.
  • the format of the downlink control information is called a DCI format (DCIDformat).
  • DCI format 0 is used for scheduling of a PUSCH of a single antenna port transmission scheme in a single cell.
  • the DCI format 4 is used for PUSCH scheduling of a multi-antenna port transmission scheme in a single cell.
  • the DCI format 1A is used for scheduling a PDSCH in a single antenna port transmission scheme or transmission diversity transmission scheme in a single cell.
  • the DCI format 2 is used for scheduling of the PDSCH of the multi-antenna port transmission method in a single cell. That is, DCI format 0 and DCI format 4 are uplink grants. DCI format 1A and DCI format 2 are downlink assignments.
  • PDSCH is a physical channel used for transmitting paging information (Paging Channel: PCH), SIB information (Broadcast Channel: BCH), and downlink data (Downlink Shared Channel: DL-SCH).
  • the SIB information includes radio resource setting information common to a plurality of UEs.
  • PCFICH is a physical channel used for transmitting information indicating a region (OFDM symbol) in which PDCCH is arranged.
  • PHICH is a physical channel used for transmitting a HARQ indicator (response information) indicating success or failure of decoding of uplink data received by the base station apparatus. For example, when the base station apparatus succeeds in decoding the uplink data included in the PUSCH, the HARQ indicator for the uplink data indicates ACK (Acknowledgement), and the base station apparatus decodes the uplink data included in the PUSCH. In case of failure, the HARQ indicator for the uplink data indicates NACK (Negative Acknowledgment).
  • a single PHICH transmits a HARQ indicator for a single uplink data. HARQ indicators for a plurality of uplink data included in the same PUSCH are transmitted using a plurality of PHICHs.
  • MTC-PDCCH (4) is a PDCCH corresponding to MTCUE1, and is a physical channel used for transmitting downlink control information (DCI) for MTCUE1.
  • DCI downlink control information
  • MTC-PDSCH is a PDSCH corresponding to MTCUE1, and is a physical channel used for transmitting PCH, SIB information and DL-SCH to MTCUE1.
  • MTC-PCFICH is a PCFICH compatible with MTCUE1, and is a physical channel used for transmitting information indicating an area (OFDM symbol) in which MTC-PDCCH (4) is arranged.
  • MTC-PHICH is a PHICH corresponding to MTCUE1, and is a physical channel used for transmitting a HARQ indicator (response information) indicating success or failure of decoding of uplink data received by the base station apparatus.
  • ULRS is used for the base station apparatus to synchronize the uplink time domain of UE1, the base station apparatus is used for measuring the uplink reception quality of UE1, or the base station apparatus It is a signal used to perform propagation channel correction for PUSCH and PUCCH.
  • the ULRS includes a demodulation reference signal (Demodulation Reference Signal: DMRS) that is one of the ULRSs that are time-multiplexed with the PUSCH or the PUCCH, and one ULRS that is transmitted regardless of the PUSCH and the PUCCH.
  • DMRS demodulation Reference Signal
  • SRS Sounding Reference Signal
  • PUCCH is channel state information (Channel Information: CSI) indicating downlink channel quality, scheduling request (Scheduling Request: SR) indicating a request for radio resources of PUSCH, and decoding of downlink data received by UE1. It is a physical channel used for transmitting uplink control information (Uplink Control Information: UCI) that is information used for communication control, such as ACK / NACK indicating success or failure.
  • CSI Channel Information
  • SR scheduling request
  • UCI Uplink Control Information
  • PUSCH is a physical channel used for transmitting uplink data (Uplink Shared Channel: UL-SCH) and uplink control information.
  • PRACH is a physical channel used for transmitting a random access preamble. The PRACH is mainly intended for the UE 1 to synchronize with the base station apparatus in the time domain, and in addition, an initial connection establishment (initial connection) establishment) procedure, a handover procedure, and a connection re-establishment (connection re-establishment) procedure. Used for uplink transmission synchronization (timing adjustment) and uplink radio resource allocation request.
  • the MTC-ULRS is used for the base station apparatus to synchronize the uplink time domain of the MTCUE1, the base station apparatus is used for measuring the reception quality of the uplink of the MTCUE1, This is a signal used by the apparatus for channel correction of MTC-PUSCH and MTC-PUCCH (9).
  • the MTC-ULRS includes a demodulation reference signal (MTC-Demodulation-Reference-Signal: MTC-DMRS) for MTCUE data, which is one of the MTC-ULRSs that are time-multiplexed with the MTC-PUSCH or MTC-PUCCH (9) and transmitted.
  • MTC-UE Sanding Reference Signal MTC-Sounding Reference-Signal: MTC-SRS
  • MTC-SRS MTC-Sounding Reference-Signal
  • MTC-PUCCH (9) is channel state information (MTC Channel State: MTC-CSI) indicating downlink channel quality of MTCUE1, and a scheduling request (MTC Scheduling Request: indicating MTC-PUSCH radio resource request).
  • MTC-SR for transmitting uplink control information (MTC-Uplink-Control-Information: MTC-UCI) that is information used for communication control, such as ACK / NACK indicating success or failure of decoding of downlink data received by MTCUE1 Is a physical channel used for
  • the MTC-PUSCH is a physical channel used for transmitting MTCUE uplink data (MTC-Uplink-Shared Channel: MTC-UL-SCH) and uplink control information.
  • MTC-PRACH (10) is a physical channel used for transmitting the random access preamble for MTCUE.
  • MTC-PRACH (10) is mainly intended for MTCUE1 to synchronize with the base station apparatus in the time domain. Besides, initial connection establishment (initial ⁇ connection establishment) procedure, handover procedure, connection reestablishment (connection re- establishment) procedure, synchronization for uplink transmission (timing adjustment), and uplink radio resource allocation request.
  • FIG. 2 is a diagram illustrating an example of a configuration of a downlink radio frame according to the first embodiment of the present invention.
  • a radio frame has a length of 10 ms and is composed of 10 subframes.
  • the length of the subframe is 1 ms, and is composed of two slots.
  • the slot length is 0.5 ms, and is composed of 7 OFDM symbols.
  • the downlink system bandwidth is composed of a plurality of OFDM subcarriers.
  • the frequency bandwidth of one subcarrier is 15 kHz, and the number of subcarriers depends on the downlink system bandwidth.
  • a resource element which is the minimum unit of radio resources, is composed of one subcarrier and one OFDM symbol.
  • a resource element is identified using a subcarrier number and an OFDM symbol number.
  • the resource block is used to express mapping of resource elements of a certain physical downlink channel.
  • virtual resource blocks and physical resource blocks are defined.
  • a certain 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.
  • FIG. 2 is a figure which shows an example of the mapping of the physical downlink channel corresponding to UE1 in connection with the 1st Embodiment of this invention.
  • the PCFICH is mapped to the 0th (first) OFDM symbol in the subframe.
  • PCFICH is mapped to four resource element groups distributed in the frequency domain.
  • a resource element group is composed of a plurality of continuous resource elements.
  • the PHICH is mapped to the OFDM symbol of the 0th (first subframe) in the subframe.
  • One PCFICH is mapped to three resource element groups distributed in the frequency domain.
  • the base station apparatus can code multiplex a plurality of PCFICHs on the same resource element.
  • the PDCCH is mapped to OFDM symbols from No. 0, No. 0 and No. 1 or No. 0 to No. 2 in the subframe.
  • PDCCH is mapped avoiding resource elements to which PCFICH and PHICH are mapped.
  • UE1 recognizes the OFDM symbol to which PDCCH is mapped based on the information received by PCFICH.
  • the base station apparatus can multiplex a plurality of PDCCHs in time and frequency.
  • the PDSCH is mapped to an OFDM symbol to which no PDCCH in the subframe is mapped.
  • the base station apparatus can frequency-multiplex, time-multiplex and / or spatially multiplex a plurality of PDSCHs.
  • the SS is transmitted in the 0th and 5th subframes in each radio frame in the time domain.
  • the synchronization signal is transmitted using the 5th and 6th OFDM symbols in the first slot.
  • the synchronization signal is transmitted in 72 subcarriers in the frequency domain symmetrically with respect to the center frequency f1 of the downlink system bandwidth of the cell.
  • the PBCH is transmitted in the 0th subframe in each radio frame in the time domain.
  • the PBCH is transmitted using OFDM symbols from the 0th to the 3rd in the second slot.
  • PBCH is transmitted in 72 subcarriers in the center of the downlink system band of the cell in the frequency domain. In FIG. 2, the description of the downlink reference signal is omitted.
  • FIG. 3 is a diagram illustrating an example of physical downlink channel mapping corresponding to MTCUE1 according to the first embodiment of the present invention.
  • the resource element corresponding to UE1 is shown centering on the center frequency f1 of the downlink system bandwidth (for example, 20 MHz), and the downlink system bandwidth corresponding to MTCUE1 (for example, 5 MHz) is the downlink corresponding to UE1.
  • system bandwidth eg 20 MHz.
  • the downlink system bandwidth corresponding to MTCUE1 also referred to as downlink bandwidth
  • the center frequency of the downlink system bandwidth (for example, 5 MHz) corresponding to MTCUE1 is f1.
  • the downlink system bandwidth corresponding to MTCUE1 is narrower than the downlink system bandwidth (for example, 20 MHz) in the base station apparatus, and can have, for example, 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, and 15 MHz. That is, for example, MTCUE1 can operate in the downlink system bandwidth corresponding to MTCUE1, such as 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, and 15 MHz. That is, it can be considered that the downlink system bandwidth corresponding to MTCUE1 is more limited than that of the conventional UE1.
  • SS, PBCH, and DLRS corresponding to MTCUE1 use resource elements within the downlink system bandwidth corresponding to MTCUE1 by using those corresponding to UE1.
  • MTC-PCFICH is mapped to the OFDM symbol of No. 6 (last subframe) in the subframe. Also, MTC-PCFICH is mapped to four resource element groups distributed in the frequency domain. A resource element group is composed of a plurality of continuous resource elements. MTC-PHICH is mapped to the 6th OFDM symbol in the subframe. One MTC-PCFICH is mapped to three resource element groups distributed in the frequency domain. Also, the base station apparatus can code multiplex a plurality of MTC-PCFICHs on the same resource element.
  • the MTC-PDCCH (4) is the sixth MTC-PDCCH resource region (4A), the sixth and fifth MTC-PDCCH resource regions (4B), or the sixth to fourth in the subframe.
  • MTC-PDCCH (4) is mapped avoiding the resource elements to which MTC-PCFICH and MTC-PHICH are mapped.
  • MTCUE1 recognizes the OFDM symbol (the start position of the OFDM symbol) to which MTC-PDCCH (4) is mapped based on the information received by MTC-PCFICH.
  • MTC-PDSCH is mapped to an OFDM symbol to which MTC-PDCCH (4) in a subframe within the downlink system bandwidth corresponding to MTCUE1 is not mapped.
  • the base station apparatus can frequency multiplex, time multiplex and / or spatially multiplex a plurality of MTC-PDSCHs.
  • MTC-PDSCH since the resource region of MTC-PDSCH is the same as the resource region of PDSCH within the downlink system bandwidth corresponding to MTCUE1, MTC-PDSCH has the same meaning as PDSCH within the downlink system bandwidth compatible with MTCUE1. .
  • the mapping of the UE1 and MTCUE1 resources in the two resource areas has no collision and can be scheduled appropriately.
  • FIGS. 4A and 4B are other diagrams showing an example of physical downlink channel mapping corresponding to MTCUE1.
  • the MTC-PDCCH (11) is an MTC-PDCCH resource region (11A to 11C) composed of a plurality of physical resource blocks in a subframe within the downlink system bandwidth corresponding to MTCUE1. ).
  • MTC-PDCCH (11) is mapped avoiding resource elements to which MTC-PCFICH and MTC-PHICH are mapped.
  • MTCUE1 recognizes the size of the physical resource area to which MTC-PDCCH (11) is mapped, for example, the MTC-PDCCH area (11A to 11C) block shown in FIG. 4a, based on the information received by MTC-PCFICH .
  • the MTC-PDCCH resource region (11A to 11C) is mapped to a plurality of physical resource blocks in the second slot.
  • the MTC-PDCCH resource regions (11A to 11C) are mapped to 1, 2, and 3 physical resource blocks, respectively.
  • the number of physical resource blocks is indicated by MTC-PCFICH information.
  • MTC-PCFICH is mapped to the resource area (11A to 11C) of MTC-PDCCH. For example, it is mapped to the first OFDM symbol in the second slot.
  • MTC-PCFICH is mapped to two resource element groups distributed in the frequency domain.
  • a resource element group is composed of a plurality of continuous resource elements.
  • MTC-PHICH is mapped to, for example, the second OFDM symbol in the second slot.
  • One MTC-PHICH is mapped to two resource element groups distributed in the frequency domain.
  • the base station apparatus can code multiplex a plurality of MTC-PHICHs on the same resource element.
  • MTC-PDSCH is mapped to an OFDM symbol to which MTC-PDCCH (4) in a subframe within the downlink system bandwidth corresponding to MTCUE1 is not mapped.
  • the base station apparatus can frequency multiplex, time multiplex and / or spatially multiplex a plurality of MTC-PDSCHs.
  • MTC-PDSCH region is the same as the PDSCH region within the downlink system bandwidth corresponding to MTCUE1, MTC-PDSCH has the same meaning as the PDSCH within the downlink system bandwidth compatible with MTCUE1.
  • the UE1 and MTCUE1 resource mapping in the two regions does not collide and can be scheduled appropriately.
  • the resource region of MTC-PDCCH (11A-11C) has shown to have one or more physical resource blocks in the second slot, but as shown in FIG. 4b, It may have a first slot and / or a second slot on the time axis and one or more unit bandwidths (eg 6 subcarriers) on the frequency axis.
  • the MTC-PDCCH resource regions (11A to 11C) are continuously mapped (localized) in units of physical resource blocks on the frequency axis, but as shown in FIG. 4b.
  • the distributed mapping can be performed in units of physical resource blocks or a unit bandwidth (for example, 6 OFDM subcarriers).
  • MTCUE1 has one end of the downlink system band corresponding to MTCUE1 as shown in FIG. ), It is possible to know the position where MTC-PCFICH is mapped by previously identifying that it is mapped to the first OFDM symbol in the second slot.
  • mapping position of MTC-PCFICH is, as shown in FIG. 4b, from one end (for example, the high frequency end) of the downlink system band corresponding to MTCUE1 and / or from the beginning of the subframe (for example, the first subframe), It is possible to start from a position specified by a preset frequency offset and / or time offset.
  • these offsets are based on parameters specific to the base station (Cell Special) (for example, PCI) or parameters specific to the mobile station (UE Special) (for example, terminal manufacturing number, individual identification number, user number, etc.) Can be calculated.
  • FIG. 5 is a diagram illustrating an example of a search space of the mobile station apparatus according to the first embodiment of the present invention.
  • a common search space (Common Search Space: CSS) and a specific search space (UE specific Search Space: USS) of the mobile station apparatus are configured in the resource region of the UE 1 compatible PDCCH resource. That is, a CSS that is a common search space is defined (arranged and set) for UEs 1A to 1C that are a plurality of UEs 1.
  • a USS that is a unique search space is defined for UE1A that is a specific UE1.
  • CSS and USS are a set of resources that the base station apparatus can use for PDCCH transmission.
  • CSS is defined by a common resource for a plurality of UE1s.
  • USS is defined independently with respect to each of UE1.
  • the base station apparatus transmits a DCI format intended for a plurality of UE1s and / or a DCI format intended for a specific UE1.
  • the DCI format for a plurality of UEs 1 is a DCI format used for SIB scheduling or a DCI format used for PRACH response scheduling.
  • the base station apparatus transmits a DCI format intended for a specific UE 1 in USS.
  • UE1 monitors PDCCH in CSS (trying to decode PDCCH). Moreover, UE1 monitors PDCCH in USS. That is, UE1 monitors a set of PDCCH candidates addressed to itself.
  • monitoring means that UE1 attempts to decode each PDCCH in the set of PDCCH candidates according to all the DCI formats to be monitored (also referred to as blind decoding).
  • RNTI Radio Network Temporary Identifier
  • transmission on PDCCH transmission on PDCCH.
  • a CRC parity bit (also simply referred to as CRC) generated based on downlink control information (which may be a DCI format) is added to the downlink control information, and after the CRC parity bit is added, Scrambled with RNTI.
  • the CRC parity bit and C-RNTI are represented by 16 bits.
  • the mobile station apparatus decodes downlink control information accompanied by CRC parity bits scrambled by RNTI. That is, the mobile station apparatus decodes the PDCCH accompanied by CRC parity bits scrambled by RNTI.
  • RNTI includes RA-RNTI, Temporary C-RNTI, and C-RNTI.
  • the MTC-PDCCH (4) -compatible MTC-PDCCH (4) resource region includes an MTCUE1-compatible search space (5) (MTC Common Search Space: MTC-CSS) and an MTCUE1-compatible search space (6) (MTC UE specific).
  • MTC-CSS MTC Common Search Space
  • MTC UE specific MTC UE specific
  • Search Space MTC-USS
  • MTC-CSS (5) that is a common search space is defined for MTCUE1A to 1C that are a plurality of MTCUE1s.
  • MTC-USS (6) which is a unique search space, is defined for MTCUE1A that is a specific MTCUE1.
  • MTC-CSS (5) and MTC-USS (6) are a set of resources that the base station apparatus can use for transmission of MTC-PDCCH (4).
  • MTCUE1 monitors MTC-PDCCH (4) in MTC-CSS (5).
  • MTCUE1 monitors MTC-PDCCH (4) in MTC-USS (6).
  • MTC-CSS (5) is defined by a common resource for a plurality of MTCUE1s.
  • MTC-USS (6) is defined independently for each MTCUE1.
  • the base station apparatus transmits a DCI format intended for a plurality of MTCUE1s and / or a DCI format intended for a specific MTCUE1.
  • the DCI format including a plurality of MTCUE1s includes a DCI format used for SIB scheduling or a DCI format used for MTC-PRACH (10) response scheduling.
  • the base station apparatus transmits a DCI format intended for a specific MTCUE1 in MTC-USS (6).
  • MTC-CSS (5) may be defined at the center of the downlink band (center of the downlink cell).
  • MTC-CSS (5) may be defined within a predetermined number of subcarriers (eg, within 72 subcarriers or within 300 subcarriers) in the center of the downlink band.
  • MTC-CSS (5) may be defined in a predetermined number of resource blocks in the center of the downlink band (for example, in 6 resource blocks or 25 resource blocks).
  • the predefined number of subcarriers in the center of the downlink band or the predefined number of resource blocks in the center of the downlink band are based on the downlink bandwidth supported by the MTCUE1.
  • MTC-CSS (5) is defined in a part of the center of the downlink band.
  • MTC-CSS (5) may be defined by a calculation formula used to specify a search space (search space position).
  • MTC-CSS (5) may be defined by setting the value of any one of a plurality of parameters included in the calculation formula to a fixed value (for example, 0). That is, how the MTC-CSS (5) is defined in the downlink band is defined in advance by specifications or the like, and can be known between the base station apparatus and the MTCUE1. By doing so, MTCUE1 can monitor MTC-PDCCH (4) in MTC-CSS (5) arranged in the center of the downlink band in the base station apparatus.
  • MTC-CSS (5) may be defined in a resource area set by the base station apparatus.
  • the base station apparatus can set the resource region in which the MTC-CSS (5) is arranged for the mobile station apparatus using a higher layer signal.
  • MTCUE1 can monitor MTC-PDCCH (4) in MTC-CSS (5) defined in advance in the center of the downlink band at the time of initial connection.
  • MTCUE1 can monitor MTC-PDCCH (4) in MTC-CSS (5) set by the base station apparatus after the initial connection.
  • MTCUE1 may monitor MTC-PDCCH (4) in MTC-CSS (5) defined in advance in the center of the downlink band after the initial connection.
  • MTC-USS (6) may be defined at the center of the downlink band (center of the downlink cell).
  • MTC-USS (6) may be defined within a predetermined number of subcarriers (eg, within 72 subcarriers or within 300 subcarriers) in the center of the downlink band.
  • MTC-USS (6) may be defined in a predetermined number of resource blocks in the center of the downlink band (for example, in 6 resource blocks or 25 resource blocks). That is, for example, MTC-USS (6) is defined in a part of the center of the downlink band.
  • MTC-USS (6) may be defined by a calculation formula used to specify a search space (search space position).
  • MTC-USS (6) may be defined in a resource area set by the base station apparatus.
  • the base station apparatus can set the resource region in which the MTC-CSS (5) is arranged for the mobile station apparatus using a higher layer signal.
  • MTCUE1 can monitor MTC-PDCCH (4) in MTC-USS (6) defined in advance in the center of the downlink band.
  • MTCUE1 can monitor MTC-PDCCH (4) in MTC-USS (6) set by the base station apparatus after the initial connection.
  • MTCUE1 may monitor MTC-PDCCH (4) in MTC-USS (6) defined in advance in the center of the downlink band after the initial connection.
  • FIG. 6 is a diagram showing a configuration of a search space in the PDCCH resource area or the MTC-PDCCH (4) resource area according to the first embodiment of the present invention.
  • aggregation level 4 CSS or MTC-CSS (5), aggregation level 8 CSS or MTC-CSS (5), and aggregation level 1 USS or MTC-USS (6) at aggregation level 2, USS or MTC-USS (6) at aggregation level 2, USS or MTC-USS (6) at aggregation level 4, USS or MTC-USS at aggregation level 8 (6 ) Is configured.
  • CSS or MTC-CSS (5) is composed of control channel elements having a predetermined number.
  • MTC-CSS (5) and MTC-USS (6) may be defined in the resource area of MTC-PDCCH (4), respectively.
  • the aggregation level (4, 8) in MTC-CSS (5) may be limited to a lower aggregation level than the aggregation level (1, 2, 4, 8) in MTC-USS (6). .
  • an aggregation level 4 CSS or MTC-CSS (5) and an aggregation level 8 CSS or MTC-CSS (5) are composed of control channel elements from 0 to 15.
  • the control channel elements constituting USS or MTC-USS (6) include a radio network temporary identifier (Radio (Network Temporary Identifier: RNTI) assigned by UE1 or MTCUE1 by a base station apparatus, an aggregation level, and a slot in a radio frame. It is determined based on the number of the.
  • Radio Network Temporary Identifier: RNTI
  • the base station device transmits a temporary cell radio network temporary identifier (Temporary Cell-Radio Network Temporary Identifier: Temporary C-RNTI) to UE1 or MTCUE1 by including it in a random access response.
  • the base station apparatus may reset the cell radio network identifier (Cell-Radio Network Temporary Identifier: C-RNTI) of UE1 or MTCUE1 after the initial access.
  • FIG. 7 is a diagram illustrating an example of SIB resource mapping according to the first embodiment of the present invention.
  • the SIB corresponding to UE1 includes 13 system information blocks of SIB1 (7A to 7C) as system information block 1 (7) and SIB2 to 13 as system information blocks 2 to 13. include.
  • the MTCUE1-compatible SIB includes 13 system information blocks SIB1 (7) and MTC-SIB2-13 (8A-8C) which are system information blocks 2-13 (8) compatible with MTCUE1. Yes.
  • SIB1 (7) is variable in the frequency resource and is transmitted in the PDSCH or MTC-PDSCH resource region within the MTCUE1-compatible downlink system bandwidth (for example, 5 MHz), fixed in the time resource, and transmitted in a period of 80 ms. Is done. Also, SIB1 (7) is retransmitted at 20 ms intervals. Also, SFN is transmitted to the fifth subframe region of a frame that is a multiple of 8.
  • SIB2 to 13 are system information blocks corresponding to UE1, and both frequency resource and time resource are variably mapped (scheduled) to PDSCH.
  • MTC-SIB2 to 13 (8) are system information blocks corresponding to MTCUE1, and both frequency resources and time resources are variably mapped (scheduled) to the resource area of MTC-PDSCH.
  • SIB1 (7) includes identification information such as an operator identifier, SIB2 to 13 and MTC-SIB2 to 13 (8) information of a period in which resources are repeatedly transmitted (System Information Window: SIW).
  • SIWs of SIB2 to 13 and MTC-SIB2 to 13 (8) may be used in common.
  • the SIBs 2 to 13 include resource scheduling information, handover information, and the like.
  • SIB2 includes PRACH resource scheduling information for UE1
  • MTC-SIB2 includes common / shared channel information such as MTC-PRACH resource scheduling information for MTCUE1.
  • FIG. 8 is a diagram illustrating a configuration of an uplink radio frame according to the first embodiment of the present invention.
  • a radio frame has a length of 10 ms and is composed of 10 subframes.
  • the length of the subframe is 1 ms, and is composed of two slots.
  • the slot length is 0.5 ms, and is composed of 7 SC-FDMA symbols.
  • the uplink system bandwidth is composed of a plurality of SC-FDMA subcarriers.
  • the frequency bandwidth of one subcarrier is 15 kHz, and the number of subcarriers depends on the downlink system bandwidth.
  • a resource element which is the minimum unit of radio resources, is composed of one subcarrier and one SC-FDMA symbol.
  • a resource element is identified using a subcarrier number and an SC-FDMA symbol number.
  • One physical resource block is defined by 7 consecutive SC-FDMA 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.
  • FIG. 8 is a diagram illustrating an example of physical uplink channel mapping corresponding to UE1 according to the first embodiment of the present invention.
  • the PUCCH is mapped with a plurality of physical resource blocks from both ends of the system frequency bandwidth.
  • ULRS is mapped to the third SC-FDMA symbol.
  • the PUSCH is mapped by avoiding the PUCCH and ULRS resource elements.
  • the base station apparatus can frequency multiplex, time multiplex and / or spatially multiplex a plurality of PUSCHs.
  • FIG. 9 is a diagram illustrating an example of physical uplink channel mapping corresponding to MTCUE1 according to the first embodiment of the present invention.
  • the resource element corresponding to MTCUE1 has an uplink system bandwidth (for example, 5 MHz) corresponding to MTCUE1 from one end (for example, a high frequency end) of the uplink system bandwidth (for example, 20 MHz) of the base station apparatus. ) Be placed within.
  • the uplink system bandwidth corresponding to MTCUE1 is narrower than the uplink system bandwidth (for example, 20 MHz) of the base station apparatus, and may have, for example, 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, and 15 MHz.
  • MTC-PUCCH (9) is mapped with a plurality of physical resource blocks from one end (eg, high frequency end) of the uplink band in the base station apparatus. That is, MTC-PUCCH (9) is arranged only at one end (for example, only at the high frequency end) of the uplink band in the base station apparatus.
  • how the MTC-PUCCH (9) is mapped to the uplink system bandwidth of the base station apparatus may be defined in advance by specifications or the like. Further, how the MTC-PUCCH (9) is mapped to the uplink system bandwidth of the base station apparatus may be set by the base station apparatus.
  • MTCUE1 can transmit uplink control information using MTC-PUCCH (9).
  • MTC-PUCCH (9) is multiplexed with PUCCH by code division.
  • MTC-ULRS is mapped within the downlink system bandwidth (for example, 5 MHz) corresponding to MTCUE1.
  • MTC-PUSCH is mapped avoiding MTC-PUCCH (9) and MTC-ULRS resource elements.
  • the base station apparatus can frequency-multiplex, time-multiplex and / or spatially multiplex a plurality of MTC-PUSCHs.
  • MTC-PUSCH since the resource region of MTC-PUSCH is the same as the resource region of PUSCH within the uplink system bandwidth corresponding to MTCUE1, MTC-PUSCH has the same meaning as PUSCH within the uplink system bandwidth compatible with MTCUE1. .
  • mapping scheduling
  • FIG. 10 is a diagram illustrating an example of mapping (scheduling) of PRACH resources according to the first embodiment of the present invention.
  • the PRACH resource is periodically scheduled in the PUSCH resource region by SIB2 transmitted by the base station apparatus.
  • the PRACH resource is composed of six resource blocks and one subframe.
  • the purpose of using the PRACH is to synchronize the UE 1 and the base station apparatus in the uplink.
  • the resources (10A to 10C) of MTC-PRACH (10), which are PRACH resources corresponding to MTCUE1, are periodically scheduled in the resource region of MTC-PUSCH by MTC-SIB2 transmitted by the base station apparatus.
  • the resource of MTC-PRACH (10) is composed of six resource blocks and one subframe.
  • the purpose of using MTC-PRACH (10) is to synchronize between MTCUE1 and the base station apparatus in the uplink.
  • the base station apparatus schedules the PRACH resource in the PUSCH resource region and the MTC-PRACH (10) resources (10A to 10C) in the MTC-PUSCH resource region. That is, since the MTC-PUSCH resource area overlaps with a part of the PUSCH resource area, the base station apparatus does not overlap the PRACH resource area and the MTC-PRACH (10) resource area (10A to 10C). Can be scheduled. Also, as shown in FIG. 10, in consideration of the versatility of the base station apparatus, the base station apparatus can also be scheduled to overlap the PRACH resource area and the MTC-PRACH (10) resource area (10C). .
  • the base station apparatus can store in advance the PRACH resource instructed to the mobile station apparatus and the position information of the resource area (10A to 10C) of the MTC-PRACH (10).
  • the base station apparatus should not store in advance the PRACH resource and the location information of the resource area (10A to 10C) of the MTC-PRACH (10) instructed to the mobile station apparatus. You can also.
  • the mobile station apparatus attach procedure (UE attach procedure), the mobile station apparatus startup procedure (UE startup procedure), the RRC connection establishment procedure (RRC connection establishment) ) Etc.
  • the mobile station device can make and receive calls, and can enter standby mode (RRC idle mode: RRC_IDLE) or wireless connection mode. It is possible to transition to (RRC connected mode: RRC_CONNECTED).
  • the mobile station apparatus makes a cell search synchronized with the base station apparatus, acquires system information (for example, MIB and SIB) from the base station apparatus, and moves to the base station apparatus in order to transition to the standby mode or the wireless connection mode. Random access.
  • system information for example, MIB and SIB
  • MIB and SIB system information
  • Random access a system information acquisition procedure and a random access procedure in the mobile station apparatus will be described.
  • FIG. 11 is a diagram illustrating an example of a system information acquisition procedure of the mobile station apparatus according to the first embodiment of the present invention. Each procedure (steps S11 to S18) will be described below.
  • the mobile station apparatus performs cell search.
  • the mobile station device performs a cell search for a cell to which a radio link is to be connected when the power is turned on, during a handover, or in a standby mode.
  • the mobile station apparatus detects the maximum power SS, for example, the carrier frequency offset and OFDM symbol timing corresponding to the base station apparatus shown in FIG.
  • the carrier frequency offset and the OFDM symbol timing correction are performed based on the detection result, and the PCI is identified.
  • the mobile station apparatus can demodulate the downlink OFDM signal of a specific base station apparatus, for example, the base station apparatus shown in FIG. As shown in FIG.
  • the downlink system bandwidth (for example, 20 MHz) that is the reception bandwidth of UE1, and the MTCUE1-compatible downlink system bandwidth (for example, 5 MHz) that is the reception bandwidth of MTCUE1 are the SS bandwidth.
  • SS signal can be received.
  • the mobile station apparatus acquires MIB information.
  • the mobile station apparatus receives the PBCH from the base station apparatus, demodulates the MIB information, and determines the system bandwidth of the base station apparatus, SFN, SIB1 from the MIB information.
  • Information such as the reception method of (7) is acquired.
  • the downlink system bandwidth for example, 20 MHz
  • the MTCUE1-compatible downlink system bandwidth for example, 5 MHz
  • PBCH signal can be received.
  • the mobile station apparatus acquires SIB1 (7) information. From the acquired MIB information, the mobile station apparatus uses the downlink system bandwidth (for example, 20 MHz) of the base station apparatus, the SIB1 (7) reception method, and the SFN information to indicate the downlink system band corresponding to MTCUE1 shown in FIG. The resource mapping position of SIB1 (7) within the width (for example, 5 MHz) is calculated, and SIB1 (7) information is acquired. As shown in FIG.
  • the base station apparatus that can support the mixture of UE1 and MTCUE1 is different from the conventional UE1 compatible base station apparatus, and the area of SIB1 (7) in advance is the downlink system bandwidth (compatible with MTCUE1) For example, scheduling is performed within 5 MHz.
  • the downlink system bandwidth (for example, 20 MHz) that is the reception bandwidth of UE1, and the MTCUE1-compatible downlink system bandwidth (for example, 5 MHz) that is the reception bandwidth of MTCUE1 covers the bandwidth of SIB1 (7). Therefore, SIB1 (7) can be received.
  • the mobile station apparatus determines UE1 or MTCUE1.
  • a mobile station apparatus judges UE1 or MTCUE1 from built-in mobile station apparatus capability information etc., and switches a processing procedure. That is, if it is MTCUE1, the process proceeds to step S17 (Yes), and if it is UE1, the process proceeds to step S15 (No).
  • the mobile station apparatus has a single capability, this step is not necessary, and the corresponding step is passed and the process proceeds to each step of UE1 and MTCUE1.
  • UE1 receives CSS (decodes PDCCH in CSS).
  • UE1 receives the radio frame signal of the downlink system bandwidth (for example, 20 MHz) corresponding to UE1 transmitted from the base station apparatus, and after the cell search in step S11, 2 using the timing information such as subframe / slot / OFDM symbol, the system bandwidth of the base station apparatus obtained through the PBCH reception in step S12, and the SFN, etc., and the 0th OFDM symbol of the PDCCH shown in FIG. 1 can be demodulated, and the 1st and 2nd OFDM symbols of the subsequent PDCCH can be demodulated.
  • the downlink system bandwidth for example, 20 MHz
  • UE1 receives SIB2-13. That is, UE 1 calculates the CSS and USS resource mapping position corresponding to UE 1 shown in FIG. 5 by demodulating PDCCH information, and detects the DCI format of CSS. When the DCI format used for SIB scheduling is detected, UE1 acquires the scheduling information of SIB2-13 and receives the information of SIB2-13 shown in FIG.
  • MTCUE1 receives MTC-CSS (5) (decodes PDCCH in MTC-CSS (5)). That is, in the case of MTCUE1, MTCUE1 receives the radio frame signal of the downlink system bandwidth (for example, 5 MHz) corresponding to MTCUE1 transmitted from the base station apparatus, and the radio frame / subframe obtained through the cell search in step S11. Using the timing information such as frame / slot / OFDM symbol, the system bandwidth of the base station apparatus obtained through the PBCH reception in step S12, and the information such as SFN, 6 of MTC-PDCCH (4) shown in FIG. It is possible to demodulate the MTC-PCFICH and MTC-PHICH in the No.
  • MTC-CSS (5) decodes PDCCH in MTC-CSS (5). That is, in the case of MTCUE1, MTCUE1 receives the radio frame signal of the downlink system bandwidth (for example, 5 MHz) corresponding to MTCUE1 transmitted from the base station apparatus, and the radio
  • MTC-PCFICH and MTC-PHICH are demodulated from the first OFDM symbol in the second slot of MTC-PDCCH (11A to 11C) shown in FIG. 4a, and then MTC-PDCCH (11A to 11C) is demodulated. It can be demodulated.
  • MTCUE1 receives the necessary MTC-SIB among MTC-SIB2 to 13 (8).
  • MTCUE1 calculates MTC-CSS (5) and MTC-USS (6) resource mapping positions corresponding to MTCUE1 shown in FIG. 5 by demodulating MTC-PDCCH (4) information, and the DCI format of MTC-CSS (5) Is detected.
  • MTCUE1 acquires scheduling information of MTC-SIB2 to 13 (8), and is necessary among MTC-SIB2 to 13 (8) shown in FIG. The information of the correct MTC-SIB is received.
  • the random access procedure of the mobile station apparatus includes two access procedures of Contention based Random Access and Non-contention based Random Access.
  • Contention based Random Access is random access that may collide between mobile station apparatuses, and is normally performed random access.
  • Non-contention based Random Access is a random access in which no collision occurs between mobile station devices, and in a special case such as a handover in order to quickly synchronize between the mobile station device and the base station device. This is performed in response to an instruction from the base station apparatus.
  • the mobile station device When the mobile station device performs random access, it transmits only the random preamble.
  • the random access preamble is composed of a preamble part and a CP (Cyclic prefix) part.
  • a RACH sequence which is a signal pattern representing information, for example, CAZAC (Constant Amplitude Zero, Auto Auto Correlation Zone Code) sequence is used, and 64 types of sequences (sequence numbers 1 to 64) are represented by 6-bit information. Expressed.
  • FIG. 12a is a diagram showing an example of a RACH sequence group according to the first embodiment of the present invention.
  • the 64 sequences are divided into three RACH sequence groups depending on the application.
  • the sequences of group A and group B are selected when the mobile station apparatus itself selects the sequence and performs random access.
  • the RACH sequence of group A is selected by the mobile station apparatus when the path loss between the mobile station apparatus and the base station apparatus is large (the radio channel quality is poor) or the transmission data capacity of message 3 is small .
  • the RACH sequence of group B is selected by the mobile station apparatus when the path loss between the mobile station apparatus and the base station apparatus is small (the radio channel quality is good) and the transmission data capacity of message 3 is large.
  • the RACH sequence of group C is notified from the base station apparatus to the mobile station apparatus when using the Non-contention based Random Access procedure. Note that the number of RACH sequences in each group is variable, and sequence information regarding the number of RACH sequences in each group is reported from the base station apparatus.
  • the mobile station apparatus can perform Contention based Random Access using the RACH sequences of Groups A and B, and can perform Non-contention based Random Access using the RACH sequences of Group C.
  • UE1 randomly selects a RACH sequence using sequence information related to PRACH, and MTCUE1 uses sequence information related to MTC-PRACH (10), and transmits a random access preamble.
  • sequence information related to PRACH is referred to as RACH sequence information
  • sequence information related to MTC-RACH (10) is referred to as MTC-RACH (10) sequence information.
  • RACH sequence information may be referred to as UE1-compatible random access preamble information
  • MTC-PRACH (10) sequence information may be referred to as MTCUE1-compatible random access preamble information.
  • RACH sequence group D is added under the RACH sequence groups A, B, and C shown in FIG. 12b (the sequence number corresponding to each RACH sequence group is redefined), and the RACH sequence group D is added.
  • a dedicated RACH sequence used only by MTCUE1 may be defined. That is, RACH sequence group D may include MTC-PRACH (10) sequence information.
  • FIG. 13 is an example of a random access (Contention based Random Access) procedure according to the first embodiment of the present invention.
  • the mobile station apparatus can obtain SIB2 or MTC-SIB2 (8) information through the system information acquisition procedure (S11 to S18) shown in FIG.
  • the SIB2 includes scheduling information of the PRACH resource region (PRACH resource region) corresponding to UE1 and RACH sequence information notified from the base station apparatus.
  • MTC-SIB2 (8) includes scheduling information of MTC-PRACH resource region (MTC-PRACH resource region) (10A to 10C) and MTC-RACH (10) sequence information notified from the base station apparatus. It is included.
  • a resource related to the MTC-PRACH includes the scheduling information of the PRACH resource region and the sequence information of the RACH, This is referred to as a PRACH resource.
  • Both the resource relating to PRACH and the resource relating to MTC-PRACH include resource region (frequency, time) and sequence information.
  • the base station apparatus notifies (assigns) the resource information about the PRACH to the mobile station apparatus using the SIB2 and the resource information about the MTC-PRACH using the MTC-SIB2 (8).
  • mapping (assignment) of the PRACH resource region and the MTC-PRACH resource region (10A to 10C) is performed without overlapping with the PRACH resource region like the MTC-PRACH resource region (10A, 10B). be able to.
  • mapping can be performed by overlapping with the PRACH resource region as in the MTC-PRACH resource region (10C).
  • the base station apparatus can store in advance the PRACH resource area and MTC-PRACH (10) resource area (10A to 10C) location information (frequency, time) notified to the mobile station apparatus. Also, considering the versatility of the base station apparatus, the base station apparatus should not store in advance the location information of the PRACH resource area and the MTC-PRACH (10) resource area (10A to 10C) instructed to the mobile station apparatus. You can also.
  • the mobile station apparatus transmits a random access preamble as a message 1 to the base station apparatus.
  • UE1 receives PRACH resource information from SIB2, and in the PRACH resource area notified from the base station apparatus as shown in FIG. 10, the RACH sequence randomly selected by the RACH sequence information.
  • the PRACH random access preamble is transmitted to the base station apparatus.
  • MTCUE1 receives information on resources related to MTC-PRACH from MTC-SIB2 (8), and as shown in FIG. 10, the MTC-PRACH resource region (10A ⁇ 10) corresponding to MTCUE1 notified from the base station apparatus.
  • the random access preamble of MTC-PRACH (10) is transmitted to the base station apparatus using the RACH sequence randomly selected by the sequence information of MTC-RACH (10). That is, UE1 can transmit a random access preamble to a base station apparatus using the resource area
  • UE1 receives PRACH resource information notified from the base station apparatus, and uses the RACH sequence information included in the PRACH resource information to transmit a downlink path loss or message 3 (
  • the sequence group A or B shown in FIG. 12a is selected based on the data size described later.
  • One CAZAC sequence is randomly selected from the selected sequence group, a random access preamble is generated based on the selected CAZAC sequence, and the PRACH resource region information included in the PRACH resource information is used to generate a random access preamble.
  • a random access preamble (message 1) is transmitted on the access channel RACH.
  • MTCUE1 receives information on resources related to MTC-PRACH notified from the base station apparatus, and uses the MTC-RACH sequence information included in the information on resources related to MTC-PRACH, and uses the MTC-RACH sequence information.
  • sequence group A or B is selected based on the data size of message 3.
  • One CAZAC sequence is randomly selected from the selected sequence group, a random access preamble is generated based on the selected CAZAC sequence, and MTC-PRACH resource region information included in the resource information about the MTC-PRACH is obtained.
  • the random access preamble (message 1) is transmitted using the random access channel RACH.
  • MTCUE1 receives information on resources related to MTC-PRACH notified from the base station apparatus, and uses the MTC-RACH sequence information included in the information on resources related to MTC-PRACH, as shown in FIG.
  • One CAZAC sequence is randomly selected from the selected sequence group D, a random access preamble is generated based on the selected CAZAC sequence, and MTC-PRACH resource region information included in the resource information related to MTC-PRACH is obtained.
  • the random access preamble (message 1) is transmitted using the random access channel RACH.
  • the base station apparatus determines whether or not it is the message 1 from the UE 1 by identifying whether or not the resource area of the random access preamble from the mobile station apparatus is a PRACH resource area. Specifically, when a random access preamble is detected in the PRACH resource area as shown in FIG. 10, the base station apparatus notifies the mobile station apparatus and stores the location of the PRACH resource area stored in advance. Since it is the same resource area as compared with the information, it is determined as random access from UE1, and the process proceeds to step S24 (Yes). On the other hand, when the base station apparatus notifies the mobile station apparatus and no random access preamble is detected in the resource area of the PRACH stored in advance, the base station apparatus proceeds to step S23 (No).
  • the base station apparatus determines whether or not it is the message 1 from the MTCUE1 by identifying whether or not the resource area of the random access preamble from the mobile station apparatus is the MTC-PRACH resource area (10A to 10C). . Specifically, when a random access preamble is detected in the resource region (10A) of the MTC-PRACH as shown in FIG. 10, the base station device notifies the mobile station device and stores the MTC stored in advance. -Compared with the location information of the PRACH resource region (10A), since it is the same resource region, it is determined as random access from MTCUE1, moves to step S25 (Yes), and notifies the mobile station apparatus. If the resource related to RACH and the resource related to MTC-RACH are the same and it cannot be determined whether the received message 1 is message 1 from UE1 or message 1 from MTCUE1, the process proceeds to step S26 (No).
  • the base station apparatus When the base station apparatus detects the random access preamble transmitted by the UE1, the base station apparatus calculates a transmission timing shift amount between the UE1 and the base station apparatus from the random access preamble, and outputs the L2 / L3 message in the PUSCH, that is, the message 3 Resource scheduling for transmission, for example, uplink radio resource location, transmission format (message size), etc.
  • Temporary C-RNTI Cell-Radio Network Temporary Identity
  • PRACH is assigned to CSS RA-RNTI (Random Access Network Temporary Identity) indicating a response (random access response) addressed to UE1 that has transmitted the random access preamble of Transmission timing gap information to the CH, scheduling information, to place the random access response message including the Temporary C-RNTI and the received preamble preamble number (sequence number), and transmits the message 2 of the UE1.
  • the DCI format 1A is used as the DCI format used for scheduling the random access response.
  • the base station apparatus When the base station apparatus detects a random access preamble transmitted by MTCUE1, the base station apparatus calculates a transmission timing deviation amount between MTCUE1 and the base station apparatus from the random access preamble, and an L2 / L3 message in MTC-PUSCH, that is, a message 3, resource scheduling for transmitting 3, for example, uplink radio resource position, transmission format (message size) and so on, Temporary C-RNTI is assigned, MTC-CSS (5) MTC-RACH random access preamble An RA-RNTI indicating a response (random access response) addressed to MTCUE1 that has been transmitted is arranged, transmission timing deviation information, scheduling information, and Temporary C in the MTC-PDSCH.
  • the base station apparatus arranges the MTC-PDCCH (4) with the CRC scrambled with the RA-RNTI. That is, for example, in the MTC-CSS (5), the base station apparatus transmits downlink control information with a CRC in which the RA-RNTI is scrambled using the MTC-PDCCH (4).
  • the base station apparatus calculates the transmission timing shift amount between the mobile station apparatus and the base station apparatus from the random access preamble, and PUSCH Resource scheduling for transmitting L2 / L3 message, that is, message 3 in both MTC and MTC-PUSCH, eg, uplink radio resource position, transmission format (message size), etc. are specified, and Temporary C-RNTI (Cell-RadioNetwork Temporary RA: R-NTT indicating a response (random access response) addressed to the mobile station device which has assigned a random access preamble to both CSS and MTC-CSS (5).
  • L2 / L3 message that is, message 3 in both MTC and MTC-PUSCH, eg, uplink radio resource position, transmission format (message size), etc.
  • Temporary C-RNTI Cell-RadioNetwork Temporary RA: R-NTT indicating a response (random access response) addressed to the mobile station device which has assigned a random access preamble to both CSS and MTC-CSS
  • a random access response message including transmission timing deviation information, scheduling information, Temporary C-RNTI, and preamble number (sequence number) of the received preamble is arranged on the PDSCH and MTC-PDSCH, and the mobile station apparatus message 2 Send.
  • radio resources scheduled in the mobile station apparatus by the random access responses in steps 24, 25, and 26 are only one resource block (one subframe).
  • the mobile station apparatus determines whether the own station is UE1 or MTCUE1. A mobile station apparatus judges whether it is UE1 or MTCUE1 from built-in mobile station apparatus capability information etc., and switches a processing procedure. If it is MTCUE1, the process proceeds to step S28 (Yes), and if it is UE1, the process proceeds to step S29 (No). However, if the mobile station apparatus has a single capability, this step is unnecessary, and the corresponding step is passed and the process proceeds to each step of UE1 and MTCUE1.
  • UE1 receives message 2 of UE1.
  • UE1 detects the presence of RA-RNTI in CSS, it confirms the content of the random access response message arranged in PDSCH, and if the preamble number corresponding to the transmitted random access preamble is included, message 2 of UE1 Extract information.
  • MTCUE1 receives MTCUE1 message 2.
  • MTCUE1 detects the presence of RA-RNTI in MTC-CSS (5)
  • MTCUE1 confirms the content of the random access response message arranged in MTC-PDSCH and includes the preamble number corresponding to the transmitted random access preamble. If so, the information of message 2 of MTCUE1 is extracted. That is, for example, MTCUE1 monitors MTC-PDCCH (4) with CRC in which RA-RNTI is scrambled in MTC-CSS (5). That is, for example, MTCUE1 monitors the downlink control information accompanied by CRC in which RA-RNTI is scrambled in MTC-CSS (5).
  • the mobile station apparatus corrects the transmission timing shift using the extracted message 2 information, and uses the scheduled C-RNTI (or C-RNTI) and IMSI (International Mobile Subscriber Identity) in the scheduled radio resource and transmission format.
  • the L2 / L3 message including information for identifying the mobile station device such as the message 3 is transmitted.
  • the mobile station device continues to wait for a certain period of time for the random access response message from the base station device, and if it does not receive the random access response message including the preamble number of the transmitted random access preamble, it again transmits the random access preamble. To do.
  • the base station apparatus receives the L2 / L3 message, that is, the message 3, in order to transmit a collision confirmation (contention resolution) message to the mobile station apparatus as a response to the message 3, It is determined whether it is message 3 from MTCUE1. As an example of the determination, a determination is made based on the PUSCH radio resource assigned to which mobile station apparatus the L2 / L3 message transmitted from the mobile station apparatus.
  • the base station device arranges Temporary C-RNTI (or C-RNTI) included in the L2 / L3 message in CSS. Then, the collision confirmation message including the identification information of the mobile station apparatus included in the message 3 is arranged in the PDSCH, and the message 4 of the UE 1 is transmitted.
  • Temporary C-RNTI or C-RNTI
  • the base station device uses the Temporary C-RNTI (included in the L2 / L3 message in MTC-CSS (5)). Or C-RNTI), a collision confirmation message including the identification information of the mobile station apparatus included in message 3 is arranged in MTC-PDSCH, and message 4 of MTCUE1 is transmitted.
  • the mobile station apparatus determines UE1 or MTCUE1.
  • a mobile station apparatus judges UE1 or MTCUE1 from built-in mobile station apparatus capability information etc., and switches a processing procedure. If it is MTCUE1, the process proceeds to step S36 (Yes), and if it is UE1, the process proceeds to step S35 (No). However, if the mobile station apparatus has a single capability, this step is unnecessary, and the corresponding step is passed and the process proceeds to each step of UE1 and MTCUE1.
  • UE1 receives the message 4 of UE1.
  • the UE 1 detects that the CSS has Temporary C-RNTI, the UE 1 confirms the content of the collision confirmation message arranged in the PDSCH, and if the identification information of the own mobile station device is included, the random access procedure is terminated.
  • MTCUE1 receives message 4 of MTCUE1.
  • MTCUE1 detects the presence of Temporary C-RNTI in MTC-CSS (5), it confirms the content of the collision confirmation message arranged in MTC-PDSCH, and if the identification information of its own mobile station device is included, End the random access procedure.
  • MTCUE1 monitors MTC-PDCCH (4) with CRC in which Temporary C-RNTI is scrambled in MTC-CSS (5).
  • the mobile station apparatus does not detect a random access response message including a preamble number corresponding to the random access preamble transmitted within a certain period, fails to transmit message 3, or collides within a certain period. If the identification information of the mobile station apparatus is not detected in the confirmation message, the process starts again from transmission of the random access preamble (message 1). After the random access procedure is completed, control data for connection is further exchanged between the base station apparatus and the mobile station apparatus.
  • the RRC connection establishment procedure (RRC Connection Establishment Procedure) defined in the LTE specifications is performed between the mobile station device and the base station device, and the standby mode is changed to the wireless connection mode.
  • the mobile station apparatus transmits a mobile station apparatus capability message during the RRC connection establishment procedure or after the RRC connection establishment procedure.
  • the mobile station apparatus transmits a mobile station apparatus capability signal indicating UE1 or MTCUE1 using a mobile station apparatus capability transmission procedure (UE Capability Transfer) defined in the LTE specification.
  • the mobile station apparatus sends a UE1 or MTCUE1 message to a mobile station apparatus capability (UE Capability Information, or UE EUTRA Capability Information) message, which is one of the RRC messages defined in the LTE specification, as the format of the mobile station apparatus capability signal. Use the information added.
  • UE Capability Information for example, 1 bit (or a plurality of encoded bits) indicating UE1 or MTCUE1, or a plurality of bits related to UE1 or MTCUE1 Information bits.
  • a mobile station apparatus capability signal indicating UE 1 or MTCUE 1 described in the abstract syntax notation ASN (Abstract Syntax Notation) is added, for example, an MTC-Capability message.
  • the mobile station apparatus capability message to which the mobile station apparatus capability signal is added is converted into an information bit string by the ASN encoder process according to the configuration of the mobile station apparatus to be described later, and the mobile station apparatus capability transmission procedure (UE Capability Transfer) to the base station device.
  • UE Capability Transfer mobile station apparatus capability transmission procedure
  • the base station apparatus extracts an information bit string by an ASN decoder process according to the configuration of the mobile station apparatus to be described later, and information on the mobile station apparatus capability message, for example, MTC-Capability information, that is, mobile station apparatus capability indicating UE1 or MTCUE1
  • MTC-Capability information that is, mobile station apparatus capability indicating UE1 or MTCUE1
  • the signal is decoded and stored as a mobile station apparatus capability in a base station apparatus and / or a core network (not shown) connected to the base station apparatus.
  • the uplink bandwidth of MTCUE1 is narrower than the uplink system bandwidth (for example, 20 MHz) of the base station device, and the uplink system bandwidth (for example, 20 MHz) of the base station device. Although mapped to the high frequency end, it is the same as the uplink system bandwidth (for example, 20 MHz) of the base station apparatus or narrower than the uplink system bandwidth (for example, 20 MHz) of the base station apparatus, and the uplink of the base station apparatus Mapping to the lower frequency end of the system bandwidth (for example, 20 MHz) or narrower than the uplink system bandwidth (for example, 20 MHz) of the base station apparatus and the center frequency f2 of the uplink system bandwidth (for example, 20 MHz) of the base station apparatus Can also be done.
  • MTC-SIB2 the uplink information of MTCUE1, such as the uplink bandwidth, frequency position of MTCUE1, and the resource region (10A to 10B) of MTC-PRACH (10), is notified by MTC-SIB2 (8).
  • the base station apparatus can identify whether the mobile station apparatus is UE1 or MTCUE1 by the random access procedure shown in FIG. Further, the base station apparatus can identify whether the mobile station apparatus is UE1 or MTCUE1 based on the mobile station apparatus capability notified from the mobile station apparatus.
  • FIG. 14 is a diagram illustrating an example of a paging transmission procedure of the base station apparatus.
  • the base station apparatus detects whether a paging message needs to be transmitted to UE1 or MTCUE1.
  • the base station device detects that the paging message needs to be transmitted, for example, when the base station device is requested by the host control device for a call notification of the mobile station device, the cell managed by the base station device This is when it is necessary to update the system information, and when a notification from the host controller is received that an earthquake and tsunami warning (ETWS) notification is necessary.
  • EWS earthquake and tsunami warning
  • the base station apparatus that has detected that transmission of a paging message is necessary identifies whether the mobile station apparatus that is the transmission target of paging is UE1 or MTCUE1 by the procedure of FIG.
  • the base station apparatus determines UE1 or MTCUE1, and switches the paging transmission procedure. That is, if it is MTCUE1, the process proceeds to step S104 (Yes), and if it is UE1, the process proceeds to step S103 (No).
  • the base station device does not perform the determination of step S102, but performs step S103 and step S103. You may perform both transmission procedures of S104.
  • EWS earthquake tsunami warning
  • the base station apparatus that has been requested to notify the call to UE1 transmits a PDCCH with a CRC scrambled with RNTI (P-RNTI) for UE1 in the CSS of the downlink system bandwidth (for example, 20 MHz) corresponding to UE1.
  • P-RNTI CRC scrambled with RNTI
  • the base station apparatus arranges the identifier of the UE 1 to be paged (temporary service subscriber identifier: S-TMSI, international subscriber identifier: IMSI) in the paging message.
  • a base station apparatus transmits the paging message by which the identifier of UE1 is arrange
  • the base station apparatus that has detected that the system information for UE1 needs to be updated, transmits a PDCCH with a CRC scrambled for RNTI (P-RNTI) for UE1 to the downlink system bandwidth corresponding to UE1 ( For example, transmission is performed using CSS of 20 MHz.
  • the base station apparatus arranges information indicating update of the system information in the paging message transmitted by the PDSCH.
  • a base station apparatus transmits the paging message by which the information which shows the update of the system information with respect to UE1 is arrange
  • the base station apparatus updates the system information that needs to be updated at a timing that becomes the update period (modification period) of the system information, and transmits the information using the PDSCH.
  • the base station apparatus that has detected that the notification of the earthquake tsunami warning (ETWS) to UE1 is necessary, transmits the PDCCH with the CRC scrambled with the RNTI for paging (P-RNTI) to UE1. It transmits with CSS of system bandwidth (for example, 20 MHz). At this time, the base station apparatus arranges information indicating a notification of an earthquake tsunami warning (ETWS) in a paging message transmitted by PDSCH. And a base station apparatus transmits the paging message by which the information which shows the notification of the earthquake tsunami warning (ETWS) with respect to UE1 is arrange
  • ETS earthquake tsunami warning
  • the base station apparatus that has been requested to make a call notification to MTCUE1 uses MTC-PDCCH (4) with a CRC scrambled for RNTI (P-RNTI) for MTCUE1 as a downlink system bandwidth corresponding to MTCUE1 (for example, (5 MHz) MTC-CSS (5).
  • P-RNTI RNTI
  • the base station apparatus arranges the identifier of MTCUE1 that is the target of paging in the paging message. Then, the base station apparatus transmits a paging message in which the identifier of MTCUE1 is arranged using MTC-PDSCH.
  • the base station apparatus that has detected that the system information for MTCUE1 needs to be updated, downloads MTC-PDCCH (4) with a CRC in which RNTI (P-RNTI) for paging is scrambled with respect to MTCUE1. Transmission is performed by MTC-CSS (5) having a link system bandwidth (for example, 5 MHz). At this time, the base station apparatus arranges information indicating the update of the system information in the paging message transmitted by the MTC-PDSCH. Then, the base station apparatus transmits a paging message in which information indicating update of system information for MTCUE1 is arranged using MTC-PDSCH. In addition, the base station apparatus updates the system information that needs to be updated at a timing that is a system information update period (modification period), and transmits the system information using MTC-PDSCH.
  • P-RNTI RNTI
  • the base station apparatus that has detected that the notification of the earthquake and tsunami warning (ETWS) to MTCUE1 is necessary requires MTC-PDCCH (4) with CRC in which RNTI (P-RNTI) for paging is scrambled for MTCUE1. Transmission is performed using MTC-CSS (5) having a downlink system bandwidth (for example, 5 MHz) corresponding to MTCUE1.
  • the base station apparatus arranges information indicating a notification of an earthquake tsunami warning (ETWS) in a paging message transmitted by MTC-PDSCH.
  • the base station apparatus transmits a paging message in which information indicating a notification of an earthquake tsunami warning (ETWS) to MTCUE1 is arranged using MTC-PDSCH.
  • the base station apparatus transmits the system information MTC-PDSCH related to the information on the earthquake tsunami warning (ETWS).
  • the base station apparatus can use different paging transmission procedures by identifying whether the mobile station apparatus is UE1 or MTCUE1. For example, the base station apparatus notifies the UE 1 of paging by transmitting the PDCCH in which the P-RNTI is arranged by using CSS, and the MTC-PDCCH (4) in which the P-RNTI is arranged as the MTC-CSS. Notification is made by transmitting in (5).
  • the MTCUE1 in the standby mode periodically monitors the MTC-PDCCH (4) in the MTC-CSS (5) and detects the transmission of the paging message.
  • a paging message for MTCUE1 is transmitted by placing an RNTI for paging (P-RNTI) in MTC-PDCCH (4).
  • P-RNTI RNTI for paging
  • MTCUE1 detects the presence of P-RNTI in MTC-CSS (5)
  • MTCUE1 receives the paging message arranged in MTC-PDSCH, and identifies its own station (temporary service subscriber identifier: S-) in the paging message. It is confirmed whether TMSI and international subscriber identifier (IMSI) are allocated. If the local station identifier (S-TMSI and IMSI) is allocated, the RRC connection establishment procedure is started.
  • the MTCUE1 in the standby mode or the wireless connection mode monitors the MTC-PDCCH (4) in the MTC-CSS (5) and detects whether the system information update or the earthquake tsunami warning (ETWS) is included in the paging message. To do.
  • MTCUE1 detects the presence of P-RNTI in MTC-CSS (5), it receives the paging message placed on MTC-PDSCH and checks whether system information update or earthquake tsunami warning (ETWS) is included To do.
  • a mobile station apparatus compatible with machine type communication can efficiently communicate.
  • a mobile station apparatus that supports machine type communication can efficiently communicate with a base station apparatus while having backward compatibility with a conventional system.
  • a low-cost MTC device or MTC terminal is provided by narrowing the downlink frequency bandwidth (reception bandwidth) and / or the uplink frequency bandwidth (transmission bandwidth) of the mobile station apparatus that supports machine type communication. can do.
  • FIG. 15 is a diagram illustrating a configuration of the base station apparatus according to the first embodiment of the present invention.
  • the base station apparatus includes an interface unit, an upper layer processing unit (3), a physical channel generation unit (3), a multiplexing unit (3), a transmission unit (3), a transmission antenna unit (3), a reception antenna unit (3), A receiving unit (3), a demultiplexing unit (3), a physical channel demodulating unit (3), and a control unit (3) are provided.
  • the physical channel generation unit (3) includes a common channel generation unit (3), a UE1-compatible channel generation unit (3), and an MTCUE1-compatible channel generation unit (3).
  • the physical channel demodulation unit (3) includes a UE1-compatible channel demodulation unit (3) and an MTCUE1-compatible channel demodulation unit (3).
  • the common channel generation unit (3) generates DLRS, SS, and PBCH signals of common channels that are commonly received by the UE1 and the MTCUE1 illustrated in FIG. As shown in FIG. 1, the UE1-compatible channel generation unit (3) generates PDCCH, PCFICH, PHICH, and PDSCH signals of channels received by the UE1. As shown in FIG. 1, the MTCUE1-compatible channel generation unit (3) generates MTC-PDCCH (4), MTC-PCFICH, MTC-PHICH, and MTC-PDSCH signals of channels received by MTCUE1.
  • the multiplexing unit (3) is DLRS, SS, PBCH, PDCCH, PCFICH, PHICH generated by the common channel generation unit (3) and the UE1-compatible channel generation unit (3), as shown in FIG.
  • the PDSCH signal is mapped to a downlink radio frame, a downlink radio frame baseband signal is generated, and sent to the transmission unit (3).
  • the multiplexing unit (3) generates a common channel generation unit (3), a UE1-compatible channel generation unit (3), and an MTCUE1-compatible channel generation when UE1 and MTCUE1 coexist.
  • DLRS, SS, PBCH, PDCCH, PCFICH, PHICH, PDSCH, MTC-PDCCH (4), MTC-PCFICH, MTC-PHICH, MTC-PDSCH signals generated by the unit (3) are mapped to downlink radio frames, Further, a fast inverse Fourier transform IFFT (Inverse Fourier Transform) and a guard interval GI (Guard Interval) are inserted to generate a baseband signal of a downlink radio frame and send it to the transmitter (3).
  • IFFT Inverse Fourier Transform
  • GI Guard Interval
  • the transmission unit (3) performs digital / analog conversion on the downlink radio frame baseband signal output from the multiplexing unit (3), performs filter processing such as bandwidth limitation, and orthogonal modulation processing to generate a predetermined RF signal. Further, the RF signal is amplified to a predetermined output power and output to the transmission antenna unit (3).
  • FIG. 13 shows one transmission antenna unit (3) and one transmission unit (3). However, according to the layer mapping process of each downlink physical channel, a plurality of transmission antenna units (3) and It is good also as providing a some transmission part (3).
  • the receiving unit (3) receives an RF signal of a predetermined uplink physical channel from the receiving antenna unit (3), performs amplification, frequency conversion, filter processing, quadrature demodulation processing, analog / digital conversion, etc., and obtains the result.
  • the uplink physical channel signal is output to the demultiplexing unit (3).
  • FIG. 15 shows one receiving antenna unit (3) and one receiving unit (3). However, according to the layer mapping process of each uplink physical channel, a plurality of receiving antenna units (3) and It is good also as providing a some receiving part (3).
  • FIG. 15 shows the transmitting antenna unit (3) and the receiving antenna unit (3) separately.
  • the antenna duplexer DUP Duplexer
  • SW antenna switching unit
  • the demultiplexing unit (3) performs OFDM symbol timing detection, guard interval GI removal, and fast Fourier transform FFT (Fast Fourier Transform) on the uplink physical channel signal received from the mobile station apparatus. 8, when the baseband signal of the uplink radio frame shown in FIG. 8 is generated and UE1 and MTCUE1 are mixed, the baseband signal of the radio frame of the uplink system bandwidth (for example, 20 MHz) shown in FIG. Then, each physical channel is extracted and output to the physical channel demodulator (3).
  • FFT Fast Fourier transform
  • the UE1-compatible channel demodulation unit (3) demodulates ULRS, PUCCH, PUSCH, and PRACH signals transmitted from the UE1 shown in FIG.
  • the MTCUE1-compatible channel demodulation unit (3) demodulates the MTC-ULRS, MTC-PUCCH (9), MTC-PUSCH, and MTC-PRACH (10) signals transmitted from the MTCUE1 shown in FIG.
  • Control unit (3) controls each block. For example, the control unit (3) performs timing control, on / off control of each block, measurement of uplink radio channel conditions, uplink and downlink radio resource scheduling, processing of predetermined communication protocols and procedures, and the like.
  • the interface unit is connected to a core network (not shown), and transmits and receives user data and control data.
  • the upper layer processing unit (3) is connected to the core network through the interface unit, and performs generation processing and extraction processing of upper layer user data and control data.
  • the upper layer processing unit (3) performs various communication protocols and procedure processes.
  • the upper layer processing unit (3) includes a data control unit (3).
  • the data control unit (3) Through the control unit (3), the data control unit (3) generates SIB1 (7) related data in the PBCH, as shown in FIG. 3, MTC-PDCCH (4), MTC-PCFICH, MTC-PHICH, and Generation of MTC-PCSCH related data, generation of downlink radio frame control data, and transmission to the mobile station apparatus are controlled. Further, as shown in FIG. 7, the data control unit (3) moves the MTC-SIB2 into the resource area (7A to 7C) of the SIB1 (7) within the downlink system bandwidth (for example, 5 MHz) corresponding to the MTCUE1. Control is performed so that resource mapping is performed in the resource areas (8A to 8C) of ⁇ 13 (8).
  • the system information acquisition procedure of the mobile station apparatus shown in FIG. 11 can be operated by the control of the data control unit (3).
  • the data control unit (3) performs resource mapping to the resource region (10A to 10C) of the SIB2 (10) within the uplink system bandwidth (for example, 5 MHz) corresponding to MTCUE1.
  • the physical channel demodulator (3) CSS, MTC-CSS (5), or CSS and MTC-CSS ( 5)
  • the random access procedure shown in FIG. 13 can operate under the control of the data control unit (3).
  • the data control unit (3) controls reception of the mobile station apparatus capability message to which the mobile station apparatus capability signal is added through the mobile station apparatus capability transmission procedure (UE Capability Transfer).
  • the upper layer processing unit (3) includes an ASN decoder, an information bit string is extracted by the ASN decoder process, and information on the mobile station apparatus capability message, for example, information on MTC-Capability, that is, UE1 or MTCUE1.
  • the mobile station apparatus capability signal shown is decoded and stored in the base station apparatus as the mobile station apparatus capability.
  • the data control unit (3) transmits a UE1-compatible paging message to the UE1-compatible channel generation unit (3) and an MTCUE1-compatible channel generation unit (3) through the paging transmission procedure of the base station apparatus. Corresponding paging messages can be inserted.
  • the base station apparatus transmits / receives an OFDM signal.
  • the present invention is not limited to this, and the base station apparatus can perform SC-FDMA scheme by the mobile station apparatus by changing the function of the circuit block.
  • the uplink signal transmitted in step 1 may be received.
  • an uplink signal transmitted by SC-FDMA (Clustered DFT-S-OFDM or CL-DFT-S-OFDM (Clustered Discrete Fourier Transform Spread OFDM)) method in which uplink frequency bands are not continuous may be received.
  • SC-FDMA Clustered DFT-S-OFDM or CL-DFT-S-OFDM (Clustered Discrete Fourier Transform Spread OFDM)
  • the configuration of the base station apparatus shown in FIG. 15 may correspond to any of the FDD mode, the TDD mode, or the dual mode of FDD / TDD.
  • FIG. 16 is a diagram illustrating the configuration of the MTCUE 1 according to the first embodiment of the present invention.
  • the MTCUE 1 includes a transmission / reception antenna unit 1, an antenna duplexer 1, a reception unit 1, a demultiplexing unit 1, a physical channel demodulation unit 1, a physical channel generation unit 1, a physical channel generation unit 1, a multiplexing unit 1, a transmission unit 1, and a control. Unit 1 and higher layer processing unit 1.
  • the transmission / reception antenna unit 1 receives a signal from the base station apparatus shown in FIG. A reception signal from the transmission / reception antenna unit 1 is input to the antenna duplexer 1, while a transmission signal from the transmission unit 1 is transmitted by the transmission / reception antenna unit 1.
  • the receiving unit 1 performs amplification, frequency conversion, quadrature demodulation, filtering, analog / digital conversion processing, etc., on the received signal from the antenna duplexer 1. Since the frequency band of the receiving unit 1 is limited to the MTCUE1-compatible downlink frequency bandwidth (for example, 5 MHz), the baseband signal of the radio frame configuration of the MTCUE1-compatible downlink frequency bandwidth (for example, 5 MHz) illustrated in FIG. Is output to the demultiplexing unit 1.
  • the demultiplexing unit (1) performs OFDM symbol timing detection, guard interval GI removal, and fast Fourier transform FFT (Fast Fourier Transform) on the downlink physical channel signal received from the base station apparatus, as shown in FIG.
  • Each physical channel signal is extracted from the baseband signal of the radio frame having the MTCUE1-compatible downlink system bandwidth (for example, 5 MHz) and output to the physical channel demodulator (1).
  • the physical channel demodulation unit (1) includes a common channel unit (1) and an MTCUE1-compatible channel demodulation unit (1).
  • the common channel section (1) demodulates the DLRS, SS, and PBCH signals of the common channels that the UE1 and MTCUE1 shown in FIG. 1 receive in common.
  • the MTCUE1-compatible channel demodulation unit (1) demodulates the MTC-PDCCH (4), MTC-PCFICH, MTC-PHICH, and MTC-PDSCH signals of channels received by the MTCUE1.
  • the physical channel generation unit (1) includes an MTCUE1-compatible channel generation unit (1).
  • the MTCUE1-compatible channel generation unit (1) receives MTC-ULRS, MTC-PUCCH (9), MTC-PUSCH, and MTC-PRACH (10) signals of channels received by the base station apparatus. Generate.
  • the UE1-compatible channel demodulator (1) demodulates ULRS, PUCCH, PUSCH, and PRACH signals transmitted from the UE1 shown in FIG.
  • the MTCUE1-compatible channel demodulation unit (1) demodulates the MTC-ULRS, MTC-PUCCH (9), MTC-PUSCH, and MTC-PRACH (10) signals transmitted from the MTCUE1 shown in FIG.
  • Control unit (1) controls each block. For example, the control unit (1) performs timing control of each block, on / off control, measurement of uplink radio channel conditions, uplink and downlink radio resource scheduling, control by a predetermined communication protocol and procedure, and the like.
  • the multiplexing unit (1) includes the MTC-ULRS, MTC-PUCCH (9), MTC-PUSCH, and MTC-PRACH (10) generated by the MTCUE1-compatible channel generation unit (1).
  • the signal is mapped to an uplink radio frame, and further, a fast inverse Fourier transform IFFT (Inverse Fourier Transform) and a guard interval GI (Guard Interval) are inserted, and the downlink frequency bandwidth corresponding to MTCUE1 shown in FIG. 3 or 4a
  • IFFT Inverse Fourier Transform
  • GI Guard Interval
  • the transmission unit (1) performs digital / analog conversion on the uplink radio frame baseband signal output from the multiplexing unit (1), performs filter processing such as bandwidth limitation, and orthogonal modulation processing to generate a predetermined RF signal. Then, the RF signal is amplified to a predetermined output power and output to the transmission / reception antenna unit (1) through the antenna duplexer (1).
  • the upper layer processing unit (1) performs generation processing and extraction processing of upper layer user data and control data, and also performs various communication protocols and procedure processing.
  • the upper layer processing unit (1) includes a data control unit (1). Through the control unit (1), the data control unit (1) generates related data of MTC-ULRS, MTC-PUCCH (9), MTC-PUSCH, and MTC-PRACH (10) as shown in FIG. Controls generation of downlink radio frames and transmission to mobile station apparatuses.
  • the data control unit (1) performs resource mapping to MTC-ULRS, MTC-PUCCH, and MTC-PUSCH within the downlink system bandwidth (for example, 5 MHz) corresponding to MTCUE1. Control.
  • the system information acquisition procedure of the mobile station apparatus shown in FIG. 11 can be operated by the control of the data control unit (1).
  • the data control unit (1) performs control so as to transmit a PRACH random access preamble to the base station apparatus using the PRACH resource region and the RACH sequence information notified from the base station apparatus.
  • the random access procedure shown in FIG. 13 can operate under the control of the data control unit (1).
  • the data control unit (1) controls the transmission of the mobile station apparatus capability message to which the mobile station apparatus capability signal is added through the mobile station apparatus capability transmission procedure (UE Capability Transfer).
  • the upper layer processing unit (1) includes an ASN encoder, is converted into an information bit string by the ASN encoder process, and, as a mobile station apparatus capability message, for example, information indicating MTC-Capability, that is, movement indicating UE1 or MTCUE1
  • the station apparatus capability signal is encoded and transmitted to the base station apparatus as the mobile station apparatus capability.
  • the data control unit (1) monitors the demodulated MTC-PDCCH (4) from the MTCUE1-compatible channel demodulation unit (1) through the paging reception procedure of the mobile station apparatus, and detects the transmission of the paging message. be able to.
  • MTCUE1 performs transmission / reception of an OFDM signal
  • this invention is not limited to this
  • You may transmit MTCUE1 by SC-FDMA system by the function change of a circuit block.
  • transmission may be performed by SC-FDMA (Clustered DFT-S-OFDM or CL-DFT-S-OFDM (Clustered Discrete Fourier Transform Spread OFDM)) method in which the uplink frequency band is not continuous.
  • SC-FDMA Clustered DFT-S-OFDM or CL-DFT-S-OFDM (Clustered Discrete Fourier Transform Spread OFDM)
  • the configuration of MTCUE1 shown in FIG. 16 may correspond to any of the FDD mode, the TDD mode, or the dual mode of FDD / TDD.
  • the system information acquisition procedure in the previous embodiments in MTCUE1 is the same as that in normal UE1 until MTCUE1 receives PBCH and SIB1 (7).
  • the procedure was different. Therefore, in the present embodiment, SIB2 to 13 and MTC-SIB2 to 13 (8) are not transmitted on different PDSCHs, and system information common to UE1 and MTCUE1 and system applied individually to one system information block Including information.
  • the base station apparatus transmits SIB2 including system information corresponding to MTC-SIB2 applied to MTCUE1.
  • SIB2 is transmitted based on the SIW of SIB1 (7), and is transmitted in the PDSCH within the downlink system bandwidth (for example, 5 MHz) corresponding to MTCUE1 or the resource region of MTC-PDSCH.
  • UE1 which received SIB2 applies the system information common to UE1 and MTCUE1, and the system information applied to UE1.
  • MTCUE1 which received SIB2 applies the system information common to UE1 and MTCUE1, and the system information applied to MTCUE1.
  • SIB3 The same applies to SIB3 and later.
  • the base station apparatus may transmit a certain system information block, which is applied only to MTCUE1, using a PDSCH different from the system information block of UE1, or may be included in the system information block of UE1 and transmitted.
  • the system information of SIB4 may be transmitted separately for SIB4 and MTC-SIB4.
  • SIB4 is transmitted by the PDSCH of the downlink system bandwidth (for example, 20 MHz) of the base station apparatus
  • MTC-SIB4 is transmitted by the PDSCH within the downlink system bandwidth corresponding to MTCUE1 or the resource region of MTC-PDSCH.
  • SIB1 (7) it is possible to make a system configuration in which system information commonly used in SIB2 to 13 and MTC-SIB2 to 13 is not transmitted redundantly. Further, in SIB1 (7), it is not necessary to transmit information of a period (System Information Window: SIW) in which MTC-SIB2 to 13 (8) resources are repeatedly transmitted, so it is necessary to change the reception processing of SIB1 (7) Disappears.
  • SIW System Information Window
  • a program that operates on a base station apparatus and a mobile station apparatus related to the present invention is a program (a program that causes a computer to function) that controls a CPU (Central Processing Unit) 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 RAM (Random Access Memory) during the processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). Reading, correction, and writing are performed by the CPU as necessary.
  • RAM Random Access Memory
  • ROMs Read Only Memory
  • HDD Hard Disk Drive
  • the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.
  • the “computer system” here is a computer system built in the mobile station apparatus or base station apparatus, and includes an OS and hardware such as peripheral devices.
  • the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
  • the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line,
  • a volatile memory inside a computer system serving as a server or a client may be included and a program that holds a program for a certain time.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
  • a part or all of the mobile station device and the base station device in the above-described embodiment may be realized as an LSI that is typically an integrated circuit, or may be realized as a chip set. Each functional block of the mobile station device and the base station device 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.

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JP2016527831A (ja) * 2013-08-09 2016-09-08 ゼットティーイー コーポレーションＺｔｅ Ｃｏｒｐｏｒａｔｉｏｎ ランダムアクセスチャネルリソース設定方法及びシステム
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CN113194541A (zh) * 2015-01-29 2021-07-30 夏普株式会社 终端装置、基站装置以及通信方法
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CN109475001A (zh) * 2017-09-08 2019-03-15 北京三星通信技术研究有限公司 随机接入前导序列的发送方法及装置
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CN109475001B (zh) * 2017-09-08 2023-11-24 北京三星通信技术研究有限公司 随机接入前导序列的发送方法及装置
WO2019050316A1 (fr) 2017-09-08 2019-03-14 Samsung Electronics Co., Ltd. Procédé et appareil de détermination de ressource, configuration de ressource, transmission de préambule d'accès aléatoire et accès aléatoire
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CN109495975A (zh) * 2017-09-11 2019-03-19 北京三星通信技术研究有限公司 随机接入方法、基站设备及用户设备
CN109803384A (zh) * 2017-11-16 2019-05-24 北京三星通信技术研究有限公司 确定资源的方法、资源配置方法及设备
CN109803384B (zh) * 2017-11-16 2024-04-09 北京三星通信技术研究有限公司 确定资源的方法、资源配置方法及设备
CN112020895A (zh) * 2018-05-15 2020-12-01 株式会社Ntt都科摩 用户装置及基站装置

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