WO2018199100A1 - 基地局装置、端末装置、通信方法、および、集積回路 - Google Patents
基地局装置、端末装置、通信方法、および、集積回路 Download PDFInfo
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- WO2018199100A1 WO2018199100A1 PCT/JP2018/016626 JP2018016626W WO2018199100A1 WO 2018199100 A1 WO2018199100 A1 WO 2018199100A1 JP 2018016626 W JP2018016626 W JP 2018016626W WO 2018199100 A1 WO2018199100 A1 WO 2018199100A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
- H04L27/26134—Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain
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- 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), DMT
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- 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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
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- 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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- 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
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
Definitions
- the present invention relates to a base station device, a terminal device, a communication method, and an integrated circuit.
- Non-Patent Document 1 Currently, the third generation partnership project (3GPP: “The Third Generation Generation Partnership Project”) has developed LTE (Long Term Termination Evolution) -Advanced® Pro and NR (New Radio) as wireless access methods and wireless network technologies for the fifth generation cellular system. technology) and standards are being developed (Non-Patent Document 1).
- 3GPP The Third Generation Generation Partnership Project
- LTE Long Term Termination Evolution
- NR New Radio
- eMBB enhanced Mobile Broadband
- URLLC Ultra-Reliable and Low Latency Communication
- IoT Internet-of-Things
- mmCTC massive Machine Type Communication
- Non-patent document 2 In order to communicate at a high frequency, a reference signal for tracking phase noise generated by an oscillator is being studied.
- An object of the present invention is to provide a terminal device, a base station device, a communication method, and an integrated circuit in which the base station device and the terminal device efficiently in the wireless communication system as described above.
- a terminal apparatus is a terminal apparatus that communicates with a base station apparatus, a multiplexing unit that maps a PTRS (Phase Tracking Reference Reference Signal) signal generated by a pseudo random code to a resource element, and a PUSCH
- a transmission unit that transmits (Physical Uplink Shared CHannel) includes, at least, a frequency position offset, a C RNTI (Cell-Radio Network Temporary Identifier), and a scheduled resource block. Based on the frequency density of PTRS and subcarriers, mapping is performed on subcarriers, and the transmission unit transmits PUSCHs on which PTRSs are mapped.
- the frequency density of the PTRS includes every other subcarrier.
- the terminal device includes a receiving unit that receives an RRC (Radio Resource Control) signal, and the offset information of the frequency position is notified by RRC.
- RRC Radio Resource Control
- the terminal device when the reception unit that receives the RRC signal is provided and the plurality of PTRSs are arranged in the same resource element after being encoded or scrambled, An index number for identifying the scrambled sequence is notified by the RRC.
- the RRC signal is received by the RRC including a reception unit that receives an RRC signal, and indicating that transmission power in some resource elements of the PTRS is zero. Is done.
- the base station apparatus is a base station apparatus that communicates with a terminal apparatus, and receives a PUSCH to which a PTRS signal is mapped, and separates the PTRS signal from the PUSCH.
- a demultiplexing unit that performs at least a frequency position offset, a C-RNTI, a scheduled number of resource blocks, and a PTRS frequency density mapped to a subcarrier based on the PTRS signal. Isolate.
- a communication method is a communication method of a terminal device that communicates with a base station device, and a PTRS signal generated by a pseudo-random code is transmitted with at least a frequency position offset, C ⁇ Based on the RNTI, the number of resource blocks to be scheduled, and the frequency density of PTRS, mapping is performed on subcarriers, and the PUSCH to which the PTRS signal is mapped is transmitted.
- a communication method is a communication method of a base station device that communicates with a terminal device, which receives a PUSCH to which a PTRS signal is mapped, and receives at least a frequency position from the PUSCH. Based on the offset, the C-RNTI, the number of resource blocks to be scheduled, and the frequency density of PTRS, the PTRS signal mapped to the subcarrier is separated.
- An integrated circuit is an integrated circuit mounted on a terminal device that communicates with a base station device, and a multiplexing unit that maps a PTRS signal generated by a pseudo-random code to a resource element And a transmission means for transmitting PUSCH, wherein the multiplexing means sub-carriers the PTRS signal based on at least a frequency position offset, C-RNTI, number of resource blocks to be scheduled, and PTRS frequency density.
- the transmission means transmits the PUSCH to which the PTRS is mapped.
- An integrated circuit is an integrated circuit mounted on a base station device that communicates with a terminal device, and includes: a receiving unit that receives a PUSCH to which a PTRS signal is mapped; Demultiplexing means for separating the PTRS signal, the demultiplexing means being mapped to subcarriers based on at least a frequency position offset, C-RNTI, the number of scheduled resource blocks, and PTRS frequency density The PTRS signal is separated.
- the base station device and the terminal device can communicate efficiently.
- FIG. 1 is a conceptual diagram of a wireless communication system in the present embodiment.
- the radio communication system includes terminal apparatuses 1A to 1C and a base station apparatus 3.
- the terminal devices 1A to 1C are also referred to as terminal devices 1.
- the terminal device 1 is also referred to as a user terminal, a mobile station device, a communication terminal, a mobile device, a terminal, a UE (User Equipment), and an MS (Mobile Station).
- the base station apparatus 3 is a radio base station apparatus, base station, radio base station, fixed station, NB (Node B), eNB (evolved Node B), BTS (Base Transceiver Station), BS (Base Station), NR NB ( NR ⁇ ⁇ Node ⁇ ⁇ B), NNB, TRP (Transmission and Reception Point), and gNB.
- orthogonal frequency division multiplexing including cyclic prefix (CP: Cyclic Prefix), single carrier frequency multiplexing (SC-).
- FDM Single-Carrier Frequency Division Multiplexing
- DFT-S-OFDM ⁇ ⁇ ⁇ Discrete Fourier Transform Spread OFDM
- MC-CDM Multi-Carrier Code Division Multiplexing
- a universal filter multicarrier (UFMC: Universal-Filtered Multi-Carrier), a filter OFDM (F-OFDM: Filtered OFDM), and a window function Multiplication OFDM (Windowed OFDM), filter bank multicarrier (FBMC: Filter-Bank Multi-Carrier) may be used.
- UMC Universal-Filtered Multi-Carrier
- F-OFDM Filtered OFDM
- Windowed OFDM window function Multiplication OFDM
- FBMC Filter-Bank Multi-Carrier
- OFDM is described as an OFDM transmission system, but the case of using the above-described other transmission system is also included in one aspect of the present invention.
- the above-described transmission method in which CP is not used or zero padding is used instead of CP may be used. Further, CP and zero padding may be added to both the front and rear.
- orthogonal frequency division multiplexing including cyclic prefix (CP: Cyclic Prefix), single carrier frequency multiplexing (SC-).
- FDM Single-Carrier Frequency Division Multiplexing
- DFT-S-OFDM ⁇ ⁇ ⁇ Discrete Fourier Transform Spread OFDM
- MC-CDM Multi-Carrier Code Division Multiplexing
- the following physical channels are used in wireless communication between the terminal device 1 and the base station device 3.
- PBCH Physical Broadcast CHannel
- PCCH Physical Control CHannel
- PSCH Physical Shared CHannel
- MIB Master Information Block
- EIB Essential Information Block
- BCH Broadcast Channel
- the PCCH is used for transmitting uplink control information (Uplink ⁇ Control Information: ⁇ UCI) in the case of uplink wireless communication (wireless communication from the terminal device 1 to the base station device 3).
- the uplink control information may include channel state information (CSI: Channel State Information) used to indicate the state of the downlink channel.
- the uplink control information may include a scheduling request (SR: “Scheduling” Request) used for requesting the UL-SCH resource.
- the uplink control information may include HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement).
- the HARQ-ACK may indicate HARQ-ACK for downlink data (Transport block, Medium Access Control, Protocol Data, Unit: MAC PDU, Downlink-Shared Channel: DL-SCH).
- downlink wireless communication wireless communication from the base station device 3 to the terminal device 1.
- DCI downlink control information
- one or a plurality of DCIs are defined for transmission of downlink control information. That is, the field for downlink control information is defined as DCI and mapped to information bits.
- DCI including information indicating whether a signal included in the scheduled PSCH indicates downlink radio communication or uplink radio communication may be defined as DCI.
- DCI including information indicating a downlink transmission period included in the scheduled PSCH may be defined as DCI.
- DCI including information indicating an uplink transmission period included in the scheduled PSCH may be defined as DCI.
- DCI including information indicating timing for transmitting HARQ-ACK for the scheduled PSCH may be defined as DCI.
- DCI including information indicating the downlink transmission period, gap, and uplink transmission period included in the scheduled PSCH may be defined as DCI.
- DCI used for scheduling of one downlink radio communication PSCH (transmission of one downlink transport block) in one cell may be defined as DCI.
- DCI used for scheduling of one uplink radio communication PSCH (transmission of one uplink transport block) in one cell may be defined as DCI.
- DCI includes information on PSCH scheduling when the PSCH includes an uplink or a downlink.
- the DCI for the downlink is also referred to as a downlink grant (downlink grant) or a downlink assignment (downlink assignment).
- the DCI for the uplink is also called an uplink grant (uplink grant) or an uplink assignment (Uplink assignment).
- the PSCH is used for transmission of uplink data (UL-SCH: Uplink Shared CHannel) or downlink data (DL-SCH: Downlink Shared CHannel) from mediated access (MAC: Medium Access Control).
- UL-SCH Uplink Shared CHannel
- DL-SCH Downlink Shared CHannel
- SI System Information
- RAR Random Access, Response
- uplink it may be used to transmit HARQ-ACK and / or CSI along with uplink data. Further, it may be used to transmit only CSI or only HARQ-ACK and CSI. That is, it may be used to transmit only UCI.
- the base station device 3 and the terminal device 1 exchange (transmit / receive) signals in a higher layer.
- the base station device 3 and the terminal device 1 transmit and receive RRC signaling (RRC message: Radio Resource Control message, RRC information: also called Radio Resource Control information) in a radio resource control (RRC: Radio Resource Control) layer. May be.
- RRC Radio Resource Control
- the base station device 3 and the terminal device 1 may transmit and receive a MAC control element in a MAC (Medium Access Control) layer.
- MAC Medium Access Control
- the RRC signaling and / or the MAC control element is also referred to as a higher layer signal.
- the PSCH may be used to transmit RRC signaling and MAC control elements.
- the RRC signaling transmitted from the base station apparatus 3 may be common signaling for a plurality of terminal apparatuses 1 in the cell.
- the RRC signaling transmitted from the base station device 3 may be signaling dedicated to a certain terminal device 1 (also referred to as dedicated signaling). That is, information specific to a terminal device (UE specific) may be transmitted to a certain terminal device 1 using dedicated signaling.
- the PSCH may be used for transmission of UE capability (UE Capability) in the uplink.
- the downlink shared channel may be referred to as a physical downlink shared channel (PDSCH: Physical Downlink Shared CHannel).
- the uplink shared channel may be referred to as a physical uplink shared channel (PUSCH: Physical-Uplink-Shared-CHannel).
- the downlink control channel may be referred to as a physical downlink control channel (PDCCH: Physical Downlink Control CHannel).
- the uplink control channel may be referred to as a physical uplink control channel (PUCCH: Physical-Uplink-Control-CHannel).
- the following downlink physical signals are used in downlink wireless communication.
- the downlink physical signal is not used for transmitting information output from the upper layer, but is used by the physical layer.
- ⁇ Synchronization signal (SS) ⁇ Reference signal (RS)
- the synchronization signal may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).
- PSS primary synchronization signal
- SSS secondary synchronization signal
- the cell ID may be detected using PSS and SSS.
- the synchronization signal is used for the terminal device 1 to synchronize the downlink frequency domain and time domain.
- the synchronization signal may be used by the terminal apparatus 1 for precoding or beam selection in precoding or beamforming by the base station apparatus 3.
- the beam may be referred to as a transmit or receive filter setting.
- the reference signal is used for the terminal apparatus 1 to perform propagation channel compensation for the physical channel.
- the reference signal may also be used for the terminal apparatus 1 to calculate downlink CSI.
- the reference signal may be used for fine synchronization such as numerology such as radio parameters and subcarrier intervals and FFT window synchronization.
- any one or more of the following downlink reference signals are used.
- DMRS Demodulation Reference Signal
- CSI-RS Channel State Information Reference Signal
- PTRS Phase Tracking Reference Signal
- MRS Mobility Reference Signal
- DMRS is used to demodulate the modulated signal.
- the CSI-RS is used for measurement of channel state information (CSI) and beam management.
- PTRS is used to track the phase due to the movement of the terminal or the like.
- MRS may be used to measure reception quality from multiple base station devices for handover.
- a reference signal for compensating for phase noise may be defined in the reference signal.
- a downlink physical channel and / or a downlink physical signal are collectively referred to as a downlink signal.
- Uplink physical channels and / or uplink physical signals are collectively referred to as uplink signals.
- a downlink physical channel and / or an uplink physical channel are collectively referred to as a physical channel.
- a downlink physical signal and / or an uplink physical signal are collectively referred to as a physical signal.
- BCH, UL-SCH and DL-SCH are transport channels.
- a channel used in a medium access control (MAC) layer is referred to as a transport channel.
- a transport channel unit used in the MAC layer is also referred to as a transport block (TB) and / or a MAC PDU (Protocol Data Unit).
- HARQ HybridbrAutomatic Repeat reQuest
- the transport block is a unit of data that the MAC layer delivers to the physical layer.
- the transport block is mapped to a code word, and an encoding process is performed for each code word.
- the reference signal may be used for radio resource measurement (RRM: Radio Resource Measurement).
- RRM Radio Resource Measurement
- the reference signal may be used for beam management.
- Beam management includes analog and / or digital beams in a transmitting device (base station device 3 in the case of downlink and terminal device 1 in the case of uplink) and a receiving device (terminal device 1 in the case of downlink).
- the beam selection may be a procedure for selecting a beam in communication between the base station device 3 and the terminal device 1.
- the beam improvement may be a procedure for changing the beam between the base station apparatus 3 and the terminal apparatus 1 that is optimal by selecting a beam with higher gain or moving the terminal apparatus 1.
- the beam recovery may be a procedure for reselecting a beam when the quality of the communication link is deteriorated due to a blockage caused by an obstacle or a person passing in communication between the base station apparatus 3 and the terminal apparatus 1.
- Beam management may include beam selection, beam improvement.
- Beam recovery may include the following procedures. -Detection of beam failure-Discovery of new beam-Transmission of beam recovery request-Monitoring of response to beam recovery request For example, when selecting a transmission beam of the base station apparatus 3 in the terminal apparatus 1, CSI-RS or A synchronization signal (for example, SSS) in the synchronization signal block may be used, or pseudo-co-location (QCL) assumption may be used.
- CSI-RS or A synchronization signal for example, SSS
- QCL pseudo-co-location
- Two antenna ports are said to be QCL if the long term property of a channel carrying a symbol at one antenna port can be inferred from the channel carrying a symbol at the other antenna port.
- the long-term characteristics of the channel include one or more of delay spread, Doppler spread, Doppler shift, average gain, and average delay. For example, when antenna port 1 and antenna port 2 are QCL with respect to average delay, this means that the reception timing of antenna port 2 can be inferred from the reception timing of antenna port 1.
- the long-term characteristics (Long ⁇ ⁇ ⁇ ⁇ term property) of a channel in a spatial QCL assumption include arrival angles (AoA (Angle of Arrival), ZoA (Zenith angle of Arrival), etc.) and / or angular spread (Angle) Spread, eg ASA (Angle Spread of Arrival) or ZSA (Zenith angle Spread of Arrival)), sending angle (AoD, ZoD, etc.) and its angular spread (Angle Spread, eg ASD (Angle Spread of Departure) or ZSS (Zenith angle) Spread of Departure)) or spatial (correlation.
- the operations of the base station device 3 and the terminal device 1 equivalent to the beam management may be defined as the beam management by the QCL assumption of the space and the radio resource (time and / or frequency).
- subframes will be described. Although referred to as a subframe in this embodiment, it may be referred to as a resource unit, a radio frame, a time interval, a time interval, or the like.
- FIG. 2 is a diagram illustrating an example of a schematic configuration of a downlink slot according to the first embodiment of the present invention.
- Each radio frame is 10 ms long.
- Each radio frame is composed of 10 subframes and X slots. That is, the length of one subframe is 1 ms.
- the uplink slot is defined in the same manner, and the downlink slot and the uplink slot may be defined separately.
- the signal or physical channel transmitted in each of the slots may be represented by a resource grid.
- the resource grid is defined by a plurality of subcarriers and a plurality of OFDM symbols.
- the number of subcarriers constituting one slot depends on the downlink and uplink bandwidths of the cell.
- Each element in the resource grid is referred to as a resource element.
- Resource elements may be identified using subcarrier numbers and OFDM symbol numbers.
- the resource block is used to express a mapping of resource elements of a certain physical downlink channel (PDSCH or the like) or uplink channel (PUSCH or the like).
- resource blocks virtual resource blocks and physical resource blocks are defined.
- a physical uplink 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. The That is, one physical resource block is composed of (7 ⁇ 12) resource elements.
- one physical resource block is defined by, for example, 6 consecutive OFDM symbols in the time domain and 12 consecutive subcarriers in the frequency domain. That is, one physical resource block is composed of (6 ⁇ 12) resource elements. At this time, one physical resource block corresponds to one slot in the time domain, and corresponds to 180 kHz (720 kHz in the case of 60 kHz) in the frequency domain when the subcarrier interval is 15 kHz. Physical resource blocks are numbered from 0 in the frequency domain.
- FIG. 3 is a diagram illustrating the relationship in the time domain between subframes, slots, and minislots.
- the subframe is 1 ms regardless of the subcarrier interval, the number of OFDM symbols included in the slot is 7 or 14, and the slot length varies depending on the subcarrier interval.
- the slot length may be defined as 0.5 / ( ⁇ f / 15) ms when the number of OFDM symbols constituting one slot is 7, where the subcarrier interval is ⁇ f (kHz).
- ⁇ f may be defined by a subcarrier interval (kHz).
- the slot length may be defined as 1 / ( ⁇ f / 15) ms.
- ⁇ f may be defined by a subcarrier interval (kHz).
- the slot length may be defined as X / 14 / ( ⁇ f / 15) ms.
- a mini-slot (which may be referred to as a sub-slot) is a time unit configured with fewer OFDM symbols than the number of OFDM symbols included in the slot.
- This figure shows an example in which a minislot is composed of 2 OFDM symbols.
- the OFDM symbols in the minislot may coincide with the OFDM symbol timing that constitutes the slot.
- the minimum scheduling unit may be a slot or a minislot.
- FIG. 4 is a diagram illustrating an example of a slot or a subframe.
- a case where the slot length is 0.5 ms at a subcarrier interval of 15 kHz is shown as an example.
- D indicates the downlink and U indicates the uplink.
- ⁇ Downlink part (duration)
- One or more of the gap and the uplink part (duration) may be included.
- 4A may be referred to as a certain time interval (for example, a minimum unit of time resources that can be allocated to one UE, or a time unit, etc.
- a plurality of minimum units of time resources are bundled to be referred to as a time unit.
- 4 (b) is an example in which all are used for downlink transmission, and FIG. 4 (b) performs uplink scheduling via the PCCH, for example, with the first time resource, and the processing delay and downlink of the PCCH.
- Uplink signal is transmitted through the uplink switching time and the gap for generating the transmission signal.
- FIG. 4 (c) is used for transmission of the downlink PCCH and / or downlink PSCH in the first time resource, through the processing delay, the downlink to uplink switching time, and the gap for transmission signal generation. Used for transmission of PSCH or PCCH.
- the uplink signal may be used for transmission of HARQ-ACK and / or CSI, that is, UCI.
- FIG. 4 (d) is used for transmission of downlink PCCH and / or downlink PSCH in the first time resource, via processing delay, downlink to uplink switching time, and gap for transmission signal generation. Used for uplink PSCH and / or PCCH transmission.
- the uplink signal may be used for transmission of uplink data, that is, UL-SCH.
- FIG. 4E is an example in which all are used for uplink transmission (uplink PSCH or PCCH).
- the above-described downlink part and uplink part may be composed of a plurality of OFDM symbols as in LTE.
- FIG. 5 is a diagram showing an example of beam forming.
- the plurality of antenna elements are connected to a single transmission unit (TXRU: “Transceiver” unit) 10, controlled in phase by a phase shifter 11 for each antenna element, and transmitted from the antenna element 12 in any direction with respect to the transmission signal.
- TXRU Transmission Unit
- the beam can be directed.
- TXRU may be defined as an antenna port, and only the antenna port may be defined in the terminal device 1. Since the directivity can be directed in an arbitrary direction by controlling the phase shifter 11, the base station apparatus 3 can communicate with the terminal apparatus 1 using a beam having a high gain.
- a method of mapping PTRS to the resource element of each terminal device when a plurality of terminal devices 1 communicate using the same radio resource is shown.
- the case where a plurality of terminal devices 1 communicate using the same radio resource may include, for example, a case where MU-MIMO (Multiuser-MIMO) or the like that multiplexes a plurality of terminal devices 1 is used.
- wireless resource of the some terminal device 1 all the radio
- FIG. 8 is a diagram showing a first configuration example of PTRS by the first method in the present embodiment.
- FIGS. 8A and 8B are configuration examples of the PTRS of each terminal device 1 when two terminal devices 1 communicate using the same radio resource.
- FIG. 8C is a configuration example of the PTRS of each terminal device 1 when three terminal devices 1 communicate using the same radio resource.
- each figure (FIGS. 8-1a to 8-3c) included in FIGS. 8-1, 8-2, and 8-3 is a diagram showing a position where PTRS is mapped in one resource block.
- the shaded portions are resource elements to which PTRS is mapped, and the other portions are resource elements other than PTRS (data, DMRS, or SRS) are mapped.
- FIG. 8A and 8B are configuration examples of the PTRS of each terminal device 1 when two terminal devices 1 communicate using the same radio resource.
- FIG. 8C is a configuration example of the PTRS of each terminal device 1 when three terminal devices 1 communicate using the same radio
- a 1st method is a method of setting the arrangement position of PTRS of the some terminal device 1 which communicates using the same resource in a different time position. That is, the first method is a method of orthogonalizing PTRSs of a plurality of terminal devices 1 in the time domain.
- the PTRS arrangement of the terminal device 1A may be as shown in FIG. 8-1a and the PTRS arrangement of the terminal device 1B may be as FIG. 8-1b.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 8-2a
- the PTRS arrangement of the terminal device 1B is shown in FIG. 8-2b. Also good.
- the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements at different time positions at the same frequency position.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 8-3a
- the PTRS arrangement of the terminal device 1B is shown in FIG. 8-3b
- the PTRS arrangement of the terminal device 1C may be as shown in FIG. 8-3c.
- PTRSs of terminal device 1A, terminal device 1B, and terminal device 1C are arranged in resource elements at different time positions at the same frequency position.
- wireless resource may be four or more, and the time position of PTRS mapped to each terminal device 1 is not limited to FIG.
- the frequency position to which PTRS is mapped is the third subcarrier from the bottom as an example, but it may be one subcarrier in the resource block.
- FIG. 9, FIG. 10, FIG. 11, FIG. 12, FIG. 13 and FIG. 14 is a diagram showing a position where PTRS is mapped in one resource block, as in FIG. A portion filled with diagonal lines is a resource element to which PTRS is mapped, and other portions are resource elements to which other than PTRS (data, DMRS, or SRS) is mapped.
- PTRS may be mapped only to resource elements other than the resource elements to which PSS, SSS, PBCH, DMRS, or CSI-RS is mapped. Further, in the case of the downlink, a pattern may be defined so that PTRS is mapped only to resource elements other than the resource elements to which PSS, SSS, PBCH, DMRS, or CSI-RS is mapped.
- PTRS may be mapped only to resource elements other than resource elements to which DMRS or SRS is mapped. Further, in the case of uplink, a pattern may be defined so that PTRS is mapped only to resource elements other than resource elements to which DMRS or SRS is mapped.
- FIG. 9 is a diagram showing a second configuration example of PTRS by the first method in the present embodiment.
- FIG. 9 is an example in which PTRSs of a plurality of terminal devices 1 are arranged at two frequency positions.
- FIGS. 9A and 9B are configuration examples of PTRS of each terminal device 1 when two terminal devices 1 communicate using the same radio resource.
- the PTRS arrangement of the terminal device 1A may be as shown in FIG. 9-1a
- the PTRS arrangement of the terminal device 1B may be as shown in FIG. 9-1b.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 9-2a
- the PTRS arrangement of the terminal device 1B is shown in FIG. 9-2b.
- the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements at different time positions at the same frequency position.
- wireless resource may be two or more, and the time position of PTRS mapped to each terminal device 1 is not limited to FIG. Moreover, the frequency position to which PTRS is mapped is not limited to FIG. 9, and may be two subcarriers in the resource block. In addition, although the example of the method of making PTRS on two subcarriers in a some terminal apparatus time-orthogonally in FIG. 9 was shown, the number of subcarriers may be three or more.
- FIG. 10 is a diagram showing a third configuration example of PTRS by the first method in the present embodiment.
- FIG. 10 is an example in which PTRSs of a plurality of terminal devices 1 are arranged at a certain time interval at one frequency position.
- FIGS. 10A and 10B are configuration examples of the PTRS of each terminal device 1 when two terminal devices 1 communicate using the same radio resource.
- FIG. 10C is a configuration example of the PTRS of each terminal device 1 when three terminal devices 1 communicate using the same radio resource.
- the PTRS arrangement of the terminal device 1A may be FIG. 10-1a and the PTRS arrangement of the terminal device 1B may be FIG. 10-1b.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 10-2a
- the PTRS arrangement of the terminal device 1B is shown in FIG. 10-2b.
- PTRS of terminal device 1A and PTRS of terminal device 1B are arranged in resource elements at different time positions at the same frequency position.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 10-3a
- the PTRS arrangement of the terminal device 1B is shown in FIG. 10-3b
- the PTRS arrangement of the terminal device 1C may be as shown in FIG. 10-3c.
- PTRSs of terminal device 1A, terminal device 1B, and terminal device 1C are arranged in resource elements at different time positions at the same frequency position.
- wireless resource may be four or more, and the time position of PTRS mapped to each terminal device 1 is not limited to FIG.
- the interval at which PTRSs are arranged is not limited to FIG.
- PTRSs are arranged for every two resource elements, but the intervals at which PTRSs are arranged may be three or more.
- the intervals at which PTRSs are arranged may not be constant and the same interval, and PTRSs may be arranged by combining a plurality of intervals.
- the frequency position to which PTRS is mapped is, for example, the third subcarrier from the bottom, but may be one subcarrier in the resource block.
- FIG. 11 is a diagram showing a fourth configuration example of PTRS by the first method in the present embodiment.
- FIG. 11 is an example in which PTRSs of a plurality of terminal devices 1 are arranged at fixed frequency intervals at two frequency positions.
- FIGS. 11-1, 11-2, and 11-3 are configuration examples of PTRS of each terminal device 1 when two terminal devices 1 communicate using the same radio resource.
- the PTRS arrangement of the terminal device 1A may be as shown in FIG. 11-1a, and the PTRS arrangement of the terminal device 1B may be as FIG. 11-1b.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 11-2a, and the PTRS arrangement of the terminal device 1B is shown in FIG. 11-2b. Also good. Also, for example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the PTRS arrangement of the terminal device 1A is shown in FIG.
- FIGS. 11A, 11B, and 11C the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements at different time positions at the same frequency position.
- the number of terminal devices 1 that communicate using the same radio resource may be two or more, and the time position of PTRS mapped to each terminal device 1 is not limited to FIG.
- the interval in the time direction in which the PTRS is arranged is not limited to FIG.
- PTRS is arranged for every two time symbols, but the interval at which PTRS is arranged may be 3 or more.
- the intervals at which PTRSs are arranged may not be constant and the same interval, and PTRSs may be arranged by combining a plurality of intervals.
- the frequency position to which PTRS is mapped is not limited to FIG. 11, and may be two subcarriers in the resource block.
- the number of subcarriers may be three or more.
- PTRSs in a plurality of terminal devices 1 that communicate simultaneously are arranged in resource elements at different time positions at the same frequency position.
- the time position is set by the base station apparatus 3, and may be set, activated, or instructed by RRC, MAC, or DCI.
- the time position may be determined based on information indicating the unique ID of the terminal device 1. For example, as information indicating the unique ID of the terminal device 1, a C-RNTI (Cell (-Radio Network Temporary Identifier) Scramble ID, user-specific ID, PTRS ID, or the like may be used.
- C-RNTI Cell (-Radio Network Temporary Identifier) Scramble ID, user-specific ID, PTRS ID, or the like
- the time position of the resource element to which the PTRS is mapped may be defined by an output generated using a pseudo-random code (for example, M sequence, Gold sequence, PN sequence, etc.) initialized by C-RNTI.
- a pseudo-random code for example, M sequence, Gold sequence, PN sequence, etc.
- the information indicating the unique ID of the terminal device 1 may be information that uniquely identifies the terminal device 1.
- Information indicating the unique ID of the terminal device 1 may be set by the base station device 3, or may be set, activated, or instructed by RRC, MAC, DCI, or the like.
- the C-RNTI may be defined as a user ID for performing unicast data communication. Also, the C-RNTI may be assigned from the base station apparatus 3 during the random access procedure. Further, as a unique ID of the terminal device 1, Temporary C-RNTI or RA-RNTI (Random Access-Radio Network Temporary Identifier) may be used.
- Temporary C-RNTI or RA-RNTI may be used as the unique ID of the terminal device 1.
- the terminal device 1 may assume a fixed PTRS pattern during the random access procedure.
- the fixed PTRS pattern may be a predetermined pattern based on, for example, MCS and / or scheduling bandwidth.
- the information indicating the unique ID of the terminal device 1 described above may be similarly applied to methods other than the first method.
- the above-described scramble ID, user-specific ID, and PTRS ID may be associated with the DMRS ID.
- a scramble ID when notified to generate a DMRS, it may be defined that PTRS resources (time, frequency, code, etc.) are determined using the scramble ID.
- FIG. 11-1a and FIG. 11-1b may be defined as different PTRS patterns, FIG. 11-1a is defined as one pattern, FIG. 11-1b is defined as C-RNTI.
- the resource element position may be defined by shifting the position of the resource element with time according to a user-specific ID. That is, in this case, FIGS. 11-1a and 11-1b may be defined as the same pattern. Also, the same applies to FIGS. 11-2 and 11-3, and the same applies to FIGS. 8, 9 and 10.
- zero power instruction information may be set, and may be set, activated, or instructed by RRC, MAC, or DCI.
- the zero power instruction information is information indicating the position of the resource element instructed to transmit with the transmission power set to 0.
- the zero power instruction information of the terminal device 1A is information indicating the position of the PTRS of the terminal device 1B
- the zero power instruction information of the terminal device 1B is the position of the PTRS of the terminal device 1A. It is information to show.
- the zero power instruction information of the terminal device 1A is information indicating the PTRS position of the terminal device 1B and the PTRS position of the terminal device 1C.
- Is information indicating the PTRS position of the terminal apparatus 1A and the PTRS position of the terminal apparatus 1C, and the zero power instruction information of the terminal apparatus 1C indicates the PTRS position of the terminal apparatus 1A and the PTRS position of the terminal apparatus 1B.
- Information indicating the PTRS position of the terminal apparatus 1A and the PTRS position of the terminal apparatus 1C, and the zero power instruction information of the terminal apparatus 1C indicates the PTRS position of the terminal apparatus 1A and the PTRS position of the terminal apparatus 1B.
- the zero power instruction information may be a position where the PTRS is arranged (for example, a subcarrier number (index) and / or a time symbol number (index)), or a density where the PTRS is arranged (for example, Continuous, every 1 subcarrier, every several subcarriers, every other time symbol, every other time symbol, ratio of PTRS to the number of subcarriers in one resource block, ratio of PTRS to the number of time symbols in one resource block Or a combination of the position where the PTRS is arranged and the density where the PTRS is arranged (for example, a combination of the subcarrier number and the density in the time domain).
- the above-described zero power instruction information may be similarly applied to methods other than the first method.
- FIG. 12 is a diagram illustrating an arrangement example of the first PTRS by the second method in the present embodiment.
- FIGS. 12A and 12B are configuration examples of PTRS of each terminal device 1 when two terminal devices 1 communicate using the same radio resource.
- FIG. 12C is a configuration example of the PTRS of each terminal device 1 when three terminal devices 1 communicate using the same radio resource.
- FIG. 12 is an example in which PTRSs of a plurality of terminal devices 1 are arranged at different frequency positions.
- a 2nd method is a method of setting the arrangement position of PTRS of the some terminal device 1 which communicates using the same resource in a different frequency position. That is, the second method is a method in which PTRSs of a plurality of terminal devices 1 are orthogonalized in the frequency domain.
- the PTRS arrangement of the terminal apparatus 1A may be as shown in FIG. 12-1a, and the PTRS arrangement of the terminal apparatus 1B may be as shown in FIG. 12-1b.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 12-2a, and the PTRS arrangement of the terminal device 1B is shown in FIG. 12-2b.
- the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements at one frequency position different from each other.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 12-3a, and the PTRS arrangement of the terminal device 1B is illustrated. 12-3b, and the PTRS arrangement of the terminal device 1C may be as shown in FIG. 12-3c.
- the PTRSs of the terminal device 1A, the terminal device 1B, and the terminal device 1C are arranged in resource elements at different frequency positions.
- the number of terminal devices 1 that communicate using the same radio resource may be four or more, and the frequency positions of PTRS mapped to each terminal device 1 are not limited to those in FIG.
- the time positions to which PTRS are mapped are continuous in the time direction, but may be mapped every other time, or may be mapped every plurality of time symbols.
- FIG. 13 is a diagram showing a second configuration example of PTRS by the second method in the present embodiment.
- FIG. 13 is an example in which PTRSs of a plurality of terminal devices 1 are arranged at two different frequency positions.
- FIGS. 13A and 13B are configuration examples of PTRS of each terminal device 1 when two terminal devices 1 communicate using the same radio resource.
- the PTRS arrangement of the terminal apparatus 1A may be as shown in FIG. 13-1a, and the PTRS arrangement of the terminal apparatus 1B may be as shown in FIG. 13-1b.
- the PTRS arrangement of the terminal device 1A is as shown in FIG. 13-2a, and the PTRS arrangement of the terminal device 1B is as FIG. 13-2b.
- the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements at one frequency position different from each other.
- wireless resource may be two or more, and the frequency position of PTRS mapped to each terminal device 1 is not limited to FIG.
- the time positions to which PTRS are mapped are continuous in the time direction, but they may be mapped every other time or may be mapped every plurality of time symbols.
- the intervals in the time direction in which PTRSs are arranged may not be the same constant intervals, and PTRSs may be arranged by combining a plurality of intervals.
- the frequency position is set by the base station apparatus 3, and may be set, activated, or instructed by RRC, MAC, or DCI. Further, the frequency position may be determined based on information indicating the unique ID of the terminal device 1. For example, as information indicating the unique ID of the terminal device 1, C-RNTI, scramble ID, user-specific ID , PTRS ID, etc. may be used. For example, the frequency position of the resource element to which the PTRS is mapped may be defined by the output generated using a pseudo-random code (for example, M sequence, Gold sequence, PN sequence, etc.) initialized by C-RNTI.
- a pseudo-random code for example, M sequence, Gold sequence, PN sequence, etc.
- base station apparatus 3 and terminal apparatus 1 determine the frequency position of PTRS based on C-RNTI.
- the frequency position of the resource element to which the PTRS is mapped may be determined using the unique ID of the terminal device 1.
- zero power instruction information may be set, and may be set, activated, or instructed by RRC, MAC, or DCI.
- the above-described scramble ID, user-specific ID, and PTRS ID may be associated with the DMRS ID.
- a scramble ID when notified to generate a DMRS, it may be defined that PTRS resources (time, frequency, code, etc.) are determined using the scramble ID.
- FIG. 12-1a and FIG. 12-1b may be defined as different PTRS patterns
- FIG. 12-1a is defined as one pattern
- FIG. 12-1b is defined as FIG. 12-1a as C-RNTI
- FIG. 12-1a and 12-1b may be defined as the same pattern. The same applies to FIGS. 12-2, 12-3, 13-1, and 13-2.
- FIG. 14 is a diagram showing a configuration example of PTRS by the third method in the present embodiment.
- FIGS. 14A, 14B, and 14C are configuration examples of PTRS of each terminal device 1 when three terminal devices 1 communicate using the same radio resource.
- the third method is a method of setting the PTRS arrangement positions of a plurality of terminal apparatuses 1 communicating using the same resource at different frequency positions and time positions. That is, the third method is a method in which the PTRS arrangement positions of the plurality of terminal devices 1 are orthogonalized in the frequency direction and the time method.
- the PTRS arrangement of the terminal device 1A is shown in FIG. 14-1a
- the PTRS arrangement of the terminal device 1B is shown in FIG. 1b
- the PTRS arrangement of the terminal device 1C may be as shown in FIG. 12-1c.
- the PTRS arrangement of the terminal apparatus 1A may be as shown in FIG. 14-2a
- the PTRS arrangement of the terminal apparatus 1B may be as shown in FIG. 14-2b
- the PTRS arrangement of the terminal apparatus 1C may be as shown in FIG.
- the PTRS arrangement of the terminal apparatus 1A may be as shown in FIG.
- the PTRS arrangement of the terminal apparatus 1B may be as shown in FIG. 14-23
- the PTRS arrangement of the terminal apparatus 1C may be as shown in FIG.
- the PTRSs of the terminal device 1A, the terminal device 1B, and the terminal device 1C are arranged in resource elements at different frequency positions and time positions.
- PTRSs in a plurality of terminal apparatuses 1 that communicate simultaneously are arranged in resource elements at different frequency positions and time positions.
- the number of terminal apparatuses 1 that communicate using the same radio resource may be four or more, and the frequency position and time position of PTRS mapped to each terminal apparatus 1 are not limited to those in FIG.
- the time positions to which PTRS are mapped may be continuous in the time direction, may be mapped every other time, may be mapped at arbitrary intervals, or every other plurality, and each terminal device 1 It suffices if the PTRS positions are orthogonal to each other.
- the frequency position and the time position may be determined based on information indicating the unique ID of the terminal device 1, for example, as information indicating the unique ID of the terminal device 1, C-RNTI, scramble ID, user A unique ID, PTRS ID, or the like may be used.
- the frequency position and time position of the resource element to which the PTRS is mapped are defined by the output generated using a pseudo-random code (for example, M sequence, Gold sequence, PN sequence, etc.) initialized by C-RNTI. It's okay.
- a pseudo-random code for example, M sequence, Gold sequence, PN sequence, etc.
- the frequency position and time position of the resource element to which the PTRS is mapped may be determined using the unique ID of the terminal device 1. Also, zero power instruction information may be set, and may be set, activated, or instructed by RRC, MAC, or DCI.
- the above-described scramble ID, user-specific ID, and PTRS ID may be associated with the DMRS ID.
- a scramble ID when notified to generate a DMRS, it may be defined that PTRS resources (time, frequency, code, etc.) are determined using the scramble ID.
- the fourth method is a method in which PTRSs of a plurality of terminal apparatuses 1 communicating with the same radio resource are arranged at the same position, and PTRSs are encoded or scrambled to scramble PTRSs in an orthogonal or pseudo-orthogonal manner. is there.
- codes of orthogonal codes and pseudo-random codes M series, Gold series, PN series, etc.
- the encoded or scrambled sequence may be set, activated, or instructed by RRC, MAC, or DCI.
- an index number may be associated with an encoded or scrambled sequence in advance, and the index number may be set, activated, or instructed by RRC, MAC, or DCI.
- the PTRS pattern may be a position (for example, a subcarrier number (index) and / or a time symbol number (index)) at which the PTRS is arranged, or a density (for example, continuous, PTRS). Every other subcarrier, every more than one subcarrier, every other time symbol, every other time symbol, the ratio of PTRS to the number of subcarriers in one resource block, the ratio of PTRS to the number of time symbols in one resource block, etc.) Or a combination of a position where PTRS is arranged and a density where PTRS is arranged (for example, a combination of a subcarrier number and a time domain density).
- the density in the time domain and / or frequency domain may be set by the MCS. Further, the density in the time domain and / or the frequency domain may be set by a scheduling bandwidth (scheduled BW) or may be set by a scheduling bandwidth and MCS.
- the density in the time domain and the density in the frequency domain may be set according to a plurality of conditions.
- One or a plurality of conditions may be selected from a frequency band, a scheduling bandwidth, an MCS, a modulation scheme, a radio transmission scheme, and / or a moving speed of a terminal device.
- the frequency direction pattern may be arranged on one subcarrier, may be discontinuously distributed using a plurality of subcarriers, or may be continuously arranged on a plurality of subcarriers. Also good.
- PTRS may not be set, and when PTRS is not set, it may be indicated by information indicating the presence or absence of PTRS, or may be defined as a pattern indicating that PTRS is not included.
- the presence or absence of PTRS and / or the pattern of PTRS may be set, activated, or instructed by RRC, MAC, or DCI.
- the PTRS pattern may be different or the same depending on the wireless transmission method.
- the wireless transmission method may be set, activated, or instructed by RRC, MAC, or DCI.
- the terminal device 1 may map PTRS in consideration of the radio transmission method notified from the base station device 3.
- PTRSs When transmitting using a plurality of antennas, PTRSs may be orthogonalized between antenna ports. Further, in the terminal device 1, at least any one port of DMRS and an antenna port that transmits PTRS may be the same. For example, when the number of DMRS antenna ports is 2 and the number of PTRS antenna ports is 1, either one of the DMRS antenna ports may be the same as the PTRS antenna port, or both may be the same. There may be. Further, QCL may be assumed for the antenna ports of DMRS and PTRS. For example, the frequency offset due to DMRS phase noise is inferred from the frequency offset compensated by PTRS. Also, DMRS may always be transmitted regardless of whether PTRS is mapped or not.
- the terminal device 1 does not have to map the PUSCH signal to the resource element to which the PTRS is mapped. That is, when the PUSCH signal is not mapped, a rate match may be applied in which the resource element to which the PTRS is mapped is not a resource element that can arrange the PUSCH signal. Moreover, although the PUSCH signal is arranged in the resource element to which PTRS is mapped, it may be overwritten by PTRS. In this case, the base station apparatus 3 may perform the demodulation process by regarding that the data is arranged in the resource element in which the PTRS is arranged.
- the base station device 3 performs scheduling and sets the PTRS pattern of the scheduled terminal device 1.
- the base station device 3 sets the PTRS pattern of each terminal device 1.
- the base station apparatus 3 may set the PTRS density, and may set the PTRS pattern based on the set density and / or a corresponding predefined pattern.
- the information indicating the unique ID of the terminal device 1 may be set by the base station device 3, or may be set, activated, or instructed by RRC, MAC, DCI, or the like.
- the frequency domain density of two terminal apparatuses 1 is set to one in a resource block, and the time domain density is set to 1 ⁇ 2 of the number of time symbols in one resource block.
- the base station apparatus 3 may set the PTRS of the terminal apparatus 1A in FIG. 8-1a, the PTRS of the terminal apparatus 1B in FIG. 8-1b, or the PTRS of the terminal apparatus 1A using the first method, for example. 10-1a, and the PTRS of the terminal device 1B may be set in FIG. 10-1b. Also, the base station apparatus 3 sets the PTRS of the terminal apparatus 1A and the terminal apparatus 1B in FIG. 8-1a or FIG.
- the time position of PTRS at (or the time position shift or offset relative to FIG. 8-1a or FIG. 10-1a) may be determined.
- C-RNTI may be initialized with a pseudo random code, and the value of the initialized pseudo random sequence may be associated with the time position.
- the pseudo-random code may be designed so that the pattern of the pseudo-random sequence matches the density of the time domain.
- the base station apparatus 3 may set the PTRS of the terminal apparatus 1A in FIG. 12-1a and the PTRS of the terminal apparatus 1B in FIG. 12-1b using the second method. Also, the base station apparatus 3 sets the PTRS of the terminal apparatus 1A and the terminal apparatus 1B in FIG. 12-1a, and based on the information indicating the unique ID of the terminal apparatus 1, the frequency position of the PTRS in each terminal apparatus 1 (Or frequency position shift or offset relative to FIG. 12-1a) may be determined. For example, C-RNTI may be initialized with a pseudo random code, and the value of the initialized pseudo random sequence may be associated with the frequency position.
- the base station apparatus 3 uses the third method to set the PTRS of the terminal apparatus 1A to FIG. 14-1a, the PTRS of the terminal apparatus 1B to FIG. 14-1b, and the PTRS of the terminal apparatus 1C to FIG. 14-1c. Also good. Further, the base station device 3 sets the PTRS of the terminal device 1A, the terminal device 1B, and the terminal device 1C in FIG. 14-1a, and based on the information indicating the unique ID of the terminal device 1, the base station device 3 The frequency position of PTRS (or frequency position shift or offset relative to FIG. 14-1a) and time position (or time position shift or offset relative to FIG. 14-1a) may be determined.
- the PTRS of the terminal device 1 to be multiplexed is not orthogonal. There may be places.
- the base station device 3 may set the transmission power of the specified resource block to 0 based on the zero power instruction information.
- the base station apparatus 3 sets the PTRS of the terminal apparatus 1A and the terminal apparatus 1B to the same pattern using the fourth method, and encodes or scrambles the PTRS to scramble the PTRS orthogonally or pseudo-orthogonally. May be.
- the index number associated with the encoded or scrambled sequence may be set, activated, or indicated by the RRC, MAC, or DCI as the encoded index number.
- the PTRS setting method (first method, second method, third method or fourth method) may be set, activated or instructed by RRC, MAC, or DCI.
- the pattern set in each terminal device 1 may be set, activated, or instructed by RRC, MAC, or DCI.
- the terminal device 1 receives the signal transmitted from the base station device 3, determines the PTRS pattern, and tracks the phase noise using the PTRS. For example, the terminal device 1 may determine the PTRS pattern in the same procedure as the PTRS setting rule in the base station device 3, or may determine the PTRS pattern using information notified by DCI. . For example, the density of PTRS may be determined using MCS and / or scheduling bandwidth.
- the terminal device 1 may determine the position of the PTRS using information indicating a unique ID of the terminal device 1 and / or a coding index number and / or a PTRS setting method. For example, in the case of the first method, the terminal apparatus 1 initializes C-RNTI with a pseudo-random code, and sets the time position (or time position shift) associated with the initialized pseudo-random sequence value to PTRS. It is good also as a time position. Further, for example, in the case of the second method, the terminal apparatus 1 initializes the C-RNTI with a pseudo-random code, and shifts the frequency position (or frequency position shift) associated with the initialized pseudo-random sequence value.
- the offset may be the frequency position of the PTRS.
- the terminal apparatus 1 initializes the C-RNTI with a pseudo-random code, and shifts the frequency position (or frequency position shift) associated with the initialized pseudo-random sequence value.
- offset) and time position may be used as PTRS frequency position and time position.
- the terminal device 1 may determine the PTRS associated with the encoding index number based on the encoding index number.
- the terminal device 1 determines the PTRS setting method set or activated in the base station device 3, and based on the determined PTRS setting method. The above processing may be performed.
- the base station apparatus 3 receives the signal transmitted from the terminal apparatus 1 and tracks phase noise using PTRS. Further, the base station apparatus 3 performs scheduling and sets information necessary for setting the PTRS when the terminal apparatus 1 transmits on the uplink.
- the information necessary for setting the PTRS includes, for example, the time position (or time position shift or offset) and / or the frequency position (or frequency position shift or offset) of the PTRS and / or zero power indication information and / or Alternatively, a PTRS setting method may be included.
- the index number associated with the encoded or scrambled sequence is the RRC, MAC, It may be set or activated or directed by DCI.
- the zero power instruction information may be set, activated, or instructed by RRC, MAC, or DCI.
- the information indicating the unique ID of the terminal device 1 may be set by the base station device 3, or may be set, activated, or instructed by RRC, MAC, DCI, or the like.
- the terminal device 1 when the CP-OFDM wireless transmission scheme is applied in uplink transmission is shown. Based on the information set in the base station device 3, the terminal device 1 sets a PTRS pattern when the terminal device 1 transmits on the uplink.
- the terminal device 1 may set a PTRS pattern using information notified by DCI. For example, the terminal device 1 may set the density of PTRS using MCS and / or scheduling bandwidth.
- the terminal device 1 uses the information indicating the unique ID of the terminal device 1 and / or the zero power instruction information and / or the encoding index number and / or the PTRS setting method, etc. Shift or offset) may be set.
- the terminal apparatus 1 initializes the C-RNTI with a pseudorandom code, and shifts or offsets the time position (or time position shift or offset) associated with the initialized pseudorandom sequence value. ) May be the PTRS time position.
- the terminal apparatus 1 initializes the C-RNTI with a pseudo-random code, and shifts the frequency position (or frequency position shift) associated with the initialized pseudo-random sequence value.
- the offset may be the frequency position of the PTRS.
- the terminal apparatus 1 initializes the C-RNTI with a pseudo-random code, and shifts the frequency position (or frequency position shift) associated with the initialized pseudo-random sequence value.
- offset) and time position may be used as PTRS frequency position and time position.
- the terminal device 1 sets PTRS associated with the encoding index number based on the encoding index number.
- the terminal device 1 determines the PTRS setting method set or activated in the base station device 3, and based on the determined PTRS setting method. The above processing may be performed.
- the terminal device 1 may set the transmission power of the specified resource block to 0 based on the zero power instruction information.
- DFT spreading may be performed by inserting PTRS into X symbols in a specific DFTS-OFDM symbol in a slot.
- X may be the number of DFTS-OFDM symbols included in the slot.
- PTRS symbols may be mapped in a specific pattern before DFT.
- PTRS may be placed in time and / or frequency after DFT spreading.
- the PTRS pattern to be input before DFT may be determined by an ID specified by C-RNTI or DCI.
- One aspect of this embodiment may be operated in carrier aggregation or dual connectivity with a radio access technology (RAT: “Radio” Access “Technology”) such as LTE or LTE-A / LTE-A Pro.
- RAT Radio Access “Technology”
- some or all cells or cell groups, carriers or carrier groups for example, primary cell (PCell: Primary Cell), secondary cell (SCell: Secondary Cell), primary secondary cell (PSCell), MCG (Master Cell Group) ), SCG (Secondary Cell Group), etc.
- PCell Primary Cell
- SCell Secondary Cell
- PSCell primary secondary cell
- MCG Master Cell Group
- SCG Secondary Cell Group
- CP-OFDM is applied as the downlink radio transmission scheme
- SC-FDM DFTS-OFDM
- FIG. 6 is a schematic block diagram showing the configuration of the terminal device 1 of the present embodiment.
- the terminal device 1 includes an upper layer processing unit 101, a control unit 103, a receiving unit 105, a transmitting unit 107, and a transmission / reception antenna 109.
- the upper layer processing unit 101 includes a radio resource control unit 1011, a scheduling information interpretation unit 1013, and a channel state information (CSI) report control unit 1015.
- the reception unit 105 includes a decoding unit 1051, a demodulation unit 1053, a demultiplexing unit 1055, a wireless reception unit 1057, and a measurement unit 1059.
- the transmission unit 107 includes an encoding unit 1071, a modulation unit 1073, a multiplexing unit 1075, a radio transmission unit 1077, and an uplink reference signal generation unit 1079.
- the upper layer processing unit 101 outputs uplink data (transport block) generated by a user operation or the like to the transmission unit 107.
- the upper layer processing unit 101 includes a medium access control (MAC: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: RLC) layer, and radio resource control. Process the (Radio Resource Control: RRC) layer.
- MAC Medium Access Control
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- RRC Radio Resource Control
- the radio resource control unit 1011 included in the upper layer processing unit 101 manages various setting information of the own device. Also, the radio resource control unit 1011 generates information arranged in each uplink channel and outputs the information to the transmission unit 107.
- the scheduling information interpretation unit 1013 included in the higher layer processing unit 101 interprets the DCI (scheduling information) received via the reception unit 105, and based on the interpretation result of the DCI, the reception unit 105 and the transmission unit 107 In order to perform control, control information is generated and output to the control unit 103.
- DCI scheduling information
- the CSI report control unit 1015 instructs the measurement unit 1059 to derive channel state information (RI / PMI / CQI / CRI) related to the CSI reference resource.
- the CSI report control unit 1015 instructs the transmission unit 107 to transmit RI / PMI / CQI / CRI.
- the CSI report control unit 1015 sets a setting used when the measurement unit 1059 calculates the CQI.
- the control unit 103 generates a control signal for controlling the reception unit 105 and the transmission unit 107 based on the control information from the higher layer processing unit 101.
- the control unit 103 outputs the generated control signal to the reception unit 105 and the transmission unit 107 to control the reception unit 105 and the transmission unit 107.
- the receiving unit 105 separates, demodulates, and decodes the received signal received from the base station apparatus 3 via the transmission / reception antenna 109 according to the control signal input from the control unit 103, and sends the decoded information to the upper layer processing unit 101. Output.
- the radio reception unit 1057 converts the downlink signal received via the transmission / reception antenna 109 into an intermediate frequency (down-conversion: down covert), removes unnecessary frequency components, and maintains the signal level appropriately. Then, the amplification level is controlled, quadrature demodulation is performed based on the in-phase component and the quadrature component of the received signal, and the quadrature demodulated analog signal is converted into a digital signal.
- the radio reception unit 1057 removes a portion corresponding to a guard interval (Guard Interval: GI) from the converted digital signal, and performs a fast Fourier transform (FFT Fourier Transform: FFT) on the signal from which the guard interval has been removed. Extract the region signal.
- GI Guard Interval
- FFT fast Fourier transform
- the demultiplexing unit 1055 separates the extracted signals into downlink PCCH, PSCH, and downlink reference signals. Further, demultiplexing section 1055 performs PCCH and PSCH propagation path compensation based on the propagation path estimation value input from measurement section 1059. Also, the demultiplexing unit 1055 outputs the separated downlink reference signal to the measurement unit 1059.
- Demodulation section 1053 demodulates the downlink PCCH and outputs the result to decoding section 1051.
- Decoding section 1051 attempts to decode the PCCH, and when decoding is successful, outputs the decoded downlink control information and the RNTI corresponding to the downlink control information to higher layer processing section 101.
- the demodulating unit 1053 demodulates the PSCH with the modulation scheme notified by a downlink grant such as QPSK (Quadrature Phase Shift Keying), 16 QAM (Quadrature Amplitude Modulation), 64 QAM, 256 QAM, and the like, and outputs the result to the decoding unit 1051 To do.
- Decoding section 1051 performs decoding based on the information related to transmission or original coding rate notified by downlink control information, and outputs the decoded downlink data (transport block) to higher layer processing section 101.
- the measurement unit 1059 performs downlink path loss measurement, channel measurement, and / or interference measurement from the downlink reference signal input from the demultiplexing unit 1055.
- the measurement unit 1059 outputs the CSI calculated based on the measurement result and the measurement result to the upper layer processing unit 101. Also, measurement section 1059 calculates an estimated value of the downlink propagation path from the downlink reference signal, and outputs it to demultiplexing section 1055.
- the transmission unit 107 generates an uplink reference signal according to the control signal input from the control unit 103, encodes and modulates the uplink data (transport block) input from the higher layer processing unit 101, PUCCH, The PUSCH and the generated uplink reference signal are multiplexed and transmitted to the base station apparatus 3 via the transmission / reception antenna 109.
- the encoding unit 1071 encodes the uplink control information and the uplink data input from the higher layer processing unit 101.
- the modulation unit 1073 modulates the coded bits input from the coding unit 1071 with a modulation scheme such as BPSK, QPSK, 16QAM, 64QAM, and 256QAM.
- the uplink reference signal generation unit 1079 is a physical cell identifier for identifying the base station device 3 (referred to as physical cell ⁇ ⁇ identity: ⁇ ⁇ ⁇ PCI, Cell ⁇ ID, etc.), a bandwidth for arranging the uplink reference signal, and an uplink grant.
- a sequence determined by a predetermined rule is generated based on the notified cyclic shift, the value of a parameter for generating the DMRS sequence, and the like.
- the multiplexing unit 1075 determines the number of spatially multiplexed PUSCH layers based on information used for PUSCH scheduling, and uses MIMO spatial multiplexing (MIMO SM: (Multiple Input Multiple Output Spatial Multiplexing) on the same PUSCH.
- MIMO SM Multiple Input Multiple Output Spatial Multiplexing
- a plurality of uplink data to be transmitted is mapped to a plurality of layers, and precoding is performed on the layers.
- the multiplexing unit 1075 performs discrete Fourier transform (Discrete-Fourier-Transform: DFT) on the modulation symbols of the PSCH according to the control signal input from the control unit 103. Further, multiplexing section 1075 multiplexes the PCCH and PSCH signals and the generated uplink reference signal for each transmission antenna port. That is, multiplexing section 1075 arranges the PCCH and PSCH signals and the generated uplink reference signal in the resource element for each transmission antenna port.
- DFT discrete Fourier transform
- the radio transmitter 1077 performs inverse fast Fourier transform (Inverse Fast Transform: IFFT) on the multiplexed signal, performs SC-FDM modulation, and adds a guard interval to the SC-FDM-modulated SC-FDM symbol.
- IFFT inverse fast Fourier transform
- Generating a baseband digital signal converting the baseband digital signal to an analog signal, generating an in-phase component and a quadrature component of an intermediate frequency from the analog signal, removing an extra frequency component for the intermediate frequency band,
- the intermediate frequency signal is converted to a high frequency signal (up-conversion: up convert), an extra frequency component is removed, the power is amplified, and output to the transmission / reception antenna 109 for transmission.
- FIG. 7 is a schematic block diagram showing the configuration of the base station apparatus 3 of the present embodiment.
- the base station apparatus 3 includes an upper layer processing unit 301, a control unit 303, a reception unit 305, a transmission unit 307, and a transmission / reception antenna 309.
- the upper layer processing unit 301 includes a radio resource control unit 3011, a scheduling unit 3013, and a CSI report control unit 3015.
- the reception unit 305 includes a decoding unit 3051, a demodulation unit 3053, a demultiplexing unit 3055, a wireless reception unit 3057, and a measurement unit 3059.
- the transmission unit 307 includes an encoding unit 3071, a modulation unit 3073, a multiplexing unit 3075, a radio transmission unit 3077, and a downlink reference signal generation unit 3079.
- the upper layer processing unit 301 includes a medium access control (MAC: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: RLC) layer, a radio resource control (Radio). Resource (Control: RRC) layer processing. Further, the upper layer processing unit 301 generates control information for controlling the reception unit 305 and the transmission unit 307 and outputs the control information to the control unit 303.
- MAC Medium Access Control
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- Radio Radio Resource
- the radio resource control unit 3011 included in the upper layer processing unit 301 generates downlink data (transport block), system information, RRC message, MAC CE (Control element), etc. arranged in the downlink PSCH, or higher layer. Obtained from the node and output to the transmission unit 307.
- the radio resource control unit 3011 manages various setting information of each terminal device 1.
- the scheduling unit 3013 included in the upper layer processing unit 301 uses the received CSI and the channel estimation value, the channel quality, and the like to which the physical channel (PSCH) is allocated based on the channel estimation value and the channel quality. PSCH) transmission coding rate, modulation scheme, transmission power, and the like are determined.
- the scheduling unit 3013 generates control information for controlling the reception unit 305 and the transmission unit 307 based on the scheduling result, and outputs the control information to the control unit 303.
- the scheduling unit 3013 generates information (for example, DCI (format)) used for physical channel (PSCH) scheduling based on the scheduling result.
- the CSI report control unit 3015 provided in the higher layer processing unit 301 controls the CSI report of the terminal device 1.
- the CSI report control unit 3015 transmits, to the terminal device 1 via the transmission unit 307, information indicating various settings assumed for the terminal device 1 to derive RI / PMI / CQI in the CSI reference resource.
- the control unit 303 generates a control signal for controlling the reception unit 305 and the transmission unit 307 based on the control information from the higher layer processing unit 301.
- the control unit 303 outputs the generated control signal to the reception unit 305 and the transmission unit 307 and controls the reception unit 305 and the transmission unit 307.
- the receiving unit 305 separates, demodulates and decodes the received signal received from the terminal device 1 via the transmission / reception antenna 309 according to the control signal input from the control unit 303, and outputs the decoded information to the higher layer processing unit 301.
- the radio reception unit 3057 converts an uplink signal received via the transmission / reception antenna 309 into an intermediate frequency (down-conversion: down covert), removes unnecessary frequency components, and appropriately maintains the signal level. In this way, the amplification level is controlled, and based on the in-phase and quadrature components of the received signal, quadrature demodulation is performed, and the quadrature demodulated analog signal is converted into a digital signal.
- the wireless receiver 3057 removes a portion corresponding to a guard interval (Guard Interval: GI) from the converted digital signal.
- the radio reception unit 3057 performs fast Fourier transform (FFT) on the signal from which the guard interval is removed, extracts a frequency domain signal, and outputs the signal to the demultiplexing unit 3055.
- FFT fast Fourier transform
- the demultiplexing unit 1055 demultiplexes the signal input from the radio receiving unit 3057 into signals such as PCCH, PSCH, and uplink reference signal. This separation is performed based on radio resource allocation information included in the uplink grant that is determined in advance by the radio resource control unit 3011 by the base station device 3 and notified to each terminal device 1. Further, the demultiplexing unit 3055 compensates the propagation paths of the PCCH and the PSCH from the propagation path estimation value input from the measurement unit 3059. Also, the demultiplexing unit 3055 outputs the separated uplink reference signal to the measurement unit 3059.
- the demodulator 3053 performs inverse discrete Fourier transform (Inverse Discrete Fourier Transform: IDFT) to obtain modulation symbols, and BPSK (Binary Shift Keying), QPSK, 16QAM,
- IDFT Inverse Discrete Fourier Transform
- BPSK Binary Shift Keying
- QPSK 16QAM
- the received signal is demodulated using a predetermined modulation scheme such as 64QAM, 256QAM or the like, or a modulation scheme that the device itself has previously notified to each terminal device 1 with an uplink grant.
- the demodulator 3053 uses the MIMO SM based on the number of spatially multiplexed sequences notified in advance to each terminal device 1 using an uplink grant and information indicating precoding performed on the sequences. A plurality of uplink data modulation symbols transmitted on the PSCH are separated.
- the decoding unit 3051 transmits the demodulated encoded bits of the PCCH and the PSCH according to a predetermined encoding method, a predetermined transmission method, or a transmission or original signal that the own device has previously notified the terminal device 1 using an uplink grant. Decoding is performed at the coding rate, and the decoded uplink data and uplink control information are output to the upper layer processing section 101. When the PSCH is retransmitted, the decoding unit 3051 performs decoding using the encoded bits held in the HARQ buffer input from the higher layer processing unit 301 and the demodulated encoded bits.
- the measurement unit 3059 measures the channel estimation value, channel quality, and the like from the uplink reference signal input from the demultiplexing unit 3055 and outputs the measured values to the demultiplexing unit 3055 and the upper layer processing unit 301.
- the transmission unit 307 generates a downlink reference signal according to the control signal input from the control unit 303, encodes and modulates downlink control information and downlink data input from the higher layer processing unit 301, and performs PCCH , PSCH, and downlink reference signal are multiplexed or transmitted with different radio resources to the terminal device 1 via the transmission / reception antenna 309.
- the encoding unit 3071 encodes downlink control information and downlink data input from the higher layer processing unit 301.
- the modulation unit 3073 modulates the coded bits input from the coding unit 3071 using a modulation scheme such as BPSK, QPSK, 16QAM, 64QAM, and 256QAM.
- the downlink reference signal generation unit 3079 generates a known sequence as a downlink reference signal, which is obtained by a predetermined rule based on a physical cell identifier (PCI) for identifying the base station apparatus 3 and the like. To do.
- PCI physical cell identifier
- the multiplexing unit 3075 maps one or more downlink data transmitted on one PSCH to one or more layers according to the number of spatially multiplexed PSCH layers, and the one or more layers Precoding the layer.
- the multiplexing unit 3075 multiplexes the downlink physical channel signal and the downlink reference signal for each transmission antenna port.
- the multiplexing unit 3075 arranges the downlink physical channel signal and the downlink reference signal in the resource element for each transmission antenna port.
- the wireless transmission unit 3077 performs inverse fast Fourier transform (Inverse Fast Fourier Transform: IFFT) on the multiplexed modulation symbols and the like, performs modulation in the OFDM scheme, adds a guard interval to the OFDM symbol that has been OFDM-modulated, and baseband
- IFFT inverse Fast Fourier Transform
- the baseband digital signal is converted to an analog signal, the in-phase and quadrature components of the intermediate frequency are generated from the analog signal, the extra frequency components for the intermediate frequency band are removed, and the intermediate-frequency signal is generated. Is converted to a high-frequency signal (up-conversion: up convert), an extra frequency component is removed, power is amplified, and output to the transmission / reception antenna 309 for transmission.
- the terminal apparatus 1 is a terminal apparatus that communicates with a base station apparatus, and includes a first reference signal, a second reference signal, and a physical uplink A transmission unit that transmits a link shared channel; and a reception unit that receives a physical downlink control channel, wherein the physical uplink shared channel is based on downlink control information received by the physical downlink control channel.
- the first reference signal that is transmitted is arranged in a partial resource element in a resource block determined based on the downlink control information, and the second reference signal uniquely identifies the terminal device Generated based on the first information.
- the first information is C-RNTI.
- the first information is a scramble ID included in the downlink control information.
- the first information is a user-specific ID included in the downlink control information.
- the second reference signal is encoded or scrambled using a predetermined encoding method, and the downlink control information is the encoded or scrambled sequence. Contains an index number for identifying.
- the first information is a second information indicating that the downlink control information sets transmission power in some resource elements of the second reference signal to zero. Contains information.
- the base station apparatus 3 is a base station apparatus that communicates with a terminal apparatus, and is a base station apparatus that communicates with a terminal apparatus, and the first base station uses a physical downlink control channel.
- a transmission unit that transmits information; a first reference signal; a second reference signal; and a reception unit that receives a physical uplink shared channel, wherein the first reference signal is the downlink control information.
- the second reference signal is generated based on first information that uniquely identifies the plurality of terminal devices arranged in the same resource. Is done.
- a communication method is a communication method of a terminal apparatus that communicates with a base station apparatus, and includes a first reference signal, a second reference signal, and a physical uplink shared channel. Transmitting, receiving the physical downlink control channel, the physical uplink shared channel is transmitted based on downlink control information received by the physical downlink control channel, and the first reference signal is the downlink.
- the second reference signal is generated based on first information that uniquely identifies the terminal device.
- the second reference signal is arranged in a partial resource element in a resource block determined based on link control information.
- a communication method is a communication method of a base station device that communicates with a terminal device, wherein first information is transmitted on a physical downlink control channel, and the first reference signal and , Receiving a second reference signal and a physical uplink shared channel, wherein the first reference signal is arranged in a partial resource element in a resource block determined based on the downlink control information, The two reference signals are generated based on first information that uniquely identifies the plurality of terminal devices arranged in the same resource.
- An integrated circuit is an integrated circuit mounted on a terminal device that communicates with a base station device, and includes a first reference signal, a second reference signal, and a physical uplink. Transmitting means for transmitting a shared channel and receiving means for receiving a physical downlink control channel, wherein the physical uplink shared channel is transmitted based on downlink control information received by the physical downlink control channel.
- the first reference signal is arranged in a partial resource element in a resource block determined based on the downlink control information, and the second reference signal uniquely identifies the terminal apparatus. 1 is generated based on the information of 1.
- An integrated circuit is an integrated circuit mounted on a base station apparatus that communicates with a terminal apparatus, and a transmission unit that transmits first information on a physical downlink control channel;
- a resource block comprising: a first reference signal; a second reference signal; and receiving means for receiving a physical uplink shared channel, wherein the first reference signal is determined based on the downlink control information
- the second reference signal is generated based on first information that uniquely identifies a plurality of the terminal devices arranged in the same resource.
- a program that operates on an apparatus according to one aspect of the present invention is a program that controls a central processing unit (CPU) or the like to function a computer so as to realize the function of the embodiment according to one aspect of the present invention. Also good.
- the program or information handled by the program is temporarily stored in a volatile memory such as a Random Access Memory (RAM), a non-volatile memory such as a flash memory, a Hard Disk Drive (HDD), or other storage system.
- RAM Random Access Memory
- HDD Hard Disk Drive
- a program for realizing the functions of the embodiments according to one aspect of the present invention may be recorded on a computer-readable recording medium. You may implement
- the “computer system” here is a computer system built in the apparatus, and includes hardware such as an operating system and peripheral devices.
- the “computer-readable recording medium” refers to a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a medium that dynamically holds a program for a short time, or other recording medium that can be read by a computer. Also good.
- each functional block or various features of the apparatus used in the above-described embodiments can be implemented or executed by an electric circuit, for example, an integrated circuit or a plurality of integrated circuits.
- Electrical circuits designed to perform the functions described herein can be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or others Programmable logic devices, discrete gate or transistor logic, discrete hardware components, or a combination thereof.
- a general purpose processor may be a microprocessor or a conventional processor, controller, microcontroller, or state machine.
- the electric circuit described above may be configured with a digital circuit or an analog circuit.
- one or more aspects of the present invention can use a new integrated circuit based on the technology.
- terminals such as D2D (Device (to Device) communicate with each other.
- the present invention can also be applied to a system to be performed.
- the present invention is not limited to the above-described embodiment.
- an example of the apparatus has been described.
- the present invention is not limited to this, and a stationary or non-movable electronic device installed indoors or outdoors, such as an AV device, a kitchen device, It can be applied to terminal devices or communication devices such as cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other daily life equipment.
- One embodiment of the present invention is used in, for example, a communication system, a communication device (for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), a program, or the like. be able to.
- a communication device for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device
- an integrated circuit for example, a communication chip
- a program or the like.
Abstract
Description
本願は、2017年4月27日に日本に出願された特願2017-088200号について優先権を主張し、その内容をここに援用する。
・PBCH(Physical Broadcast CHannel)
・PCCH(Physical Control CHannel)
・PSCH(Physical Shared CHannel)
PBCHは、端末装置1が必要な重要なシステム情報を含む重要情報ブロック(MIB: Master Information Block、EIB: Essential Information Block、BCH:Broadcast Channel)を報知するために用いられる。
・同期信号(Synchronization signal: SS)
・参照信号(Reference Signal: RS)
同期信号は、プライマリ同期信号(PSS:Primary Synchronization Signal)およびセカンダリ同期信号(SSS)を含んでよい。PSSとSSSを用いてセルIDが検出されてよい。
・CSI-RS(Channel State Information Reference Signal)
・PTRS(Phase Tracking Reference Signal)
・MRS(Mobility Reference Signal)
DMRSは、変調信号を復調するために使用される。なお、DMRSには、PBCHを復調するための参照信号と、PSCHを復調するための参照信号の2種類が定義されてもよいし、両方をDMRSと称してもよい。CSI-RSは、チャネル状態情報(CSI:Channel State Information)の測定およびビームマネジメントに使用される。PTRSは、端末の移動等により位相をトラックするために使用される。MRSは、ハンドオーバのための複数の基地局装置からの受信品質を測定するために使用されてよい。また、参照信号には、位相雑音を補償するための参照信号が定義されてもよい。
・ビーム選択(Beam selection)
・ビーム改善(Beam refinement)
・ビームリカバリ(Beam recovery)
例えば、ビーム選択は、基地局装置3と端末装置1の間の通信においてビームを選択する手続きであってよい。また、ビーム改善は、さらに利得の高いビームの選択、あるいは端末装置1の移動によって最適な基地局装置3と端末装置1の間のビームの変更をする手続きであってよい。ビームリカバリは、基地局装置3と端末装置1の間の通信において遮蔽物や人の通過などにより生じるブロッケージにより通信リンクの品質が低下した際にビームを再選択する手続きであってよい。
・ビーム失敗(beam failure)の検出
・新しいビームの発見
・ビームリカバリリクエストの送信
・ビームリカバリリクエストに対する応答のモニタ
例えば、端末装置1における基地局装置3の送信ビームを選択する際にCSI-RSまたは同期信号ブロック内の同期信号(例えば、SSS)を用いてもよいし、擬似同位置(QCL:Quasi Co-Location)想定を用いてもよい。
図4は、スロットまたはサブフレームの一例を示す図である。ここでは、サブキャリア間隔15kHzにおいてスロット長が0.5msの場合を例として示している。同図において、Dは下りリンク、Uは上りリンクを示している。同図に示されるように、ある時間区間内(例えば、システムにおいて1つのUEに対して割り当てなければならない最小の時間区間)においては、
・下りリンクパート(デュレーション)
・ギャップ
・上りリンクパート(デュレーション)のうち1つまたは複数を含んでよい。
3 基地局装置
10 TXRU
11 位相シフタ
12 アンテナ
101 上位層処理部
103 制御部
105 受信部
107 送信部
109 アンテナ
301 上位層処理部
303 制御部
305 受信部
307 送信部
1011 無線リソース制御部
1013 スケジューリング情報解釈部
1015 チャネル状態情報報告制御部
1051 復号化部
1053 復調部
1055 多重分離部
1057 無線受信部
1059 測定部
1071 符号化部
1073 変調部
1075 多重部
1077 無線送信部
1079 上りリンク参照信号生成部
3011 無線リソース制御部
3013 スケジューリング部
3015 チャネル状態情報報告制御部
3051 復号化部
3053 復調部
3055 多重分離部
3057 無線受信部
3059 測定部
3071 符号化部
3073 変調部
3075 多重部
3077 無線送信部
3079 下りリンク参照信号生成部
Claims (10)
- 基地局装置と通信する端末装置であって、
疑似ランダム符号により生成されたPTRS信号をリソースエレメントへマッピングする多重部と、
PUSCHを送信する送信部とを、備え、
前記多重部は、前記PTRS信号を、少なくとも、周波数位置のオフセット、C-RNTI、スケジュールされるリソースブロック数、PTRSの周波数密度に基づいてサブキャリアにマッピングし、
前記送信部は、PTRSがマッピングされたPUSCHを送信することを特徴とする端末装置。 - 前記PTRSの周波数密度には、1サブキャリアおきの場合が含まれていることを特徴とする請求項1記載の端末装置。
- RRC信号を受信する受信部を備え、
前記周波数位置のオフセット情報はRRCにより通知されることを特徴とする請求項1記載の端末装置。 - RRC信号を受信する受信部を備え、
複数の前記PTRSを同一の前記リソースエレメントに、
符号化またはスクランブルして配置する場合、
符号化またはスクランブルされた系列を識別するためのインデックス番号は、
前記RRCにより通知されることを特徴とする請求項1記載の端末装置。 - RRC信号を受信する受信部を備え、
前記PTRSの一部のリソースエレメントにおける送信電力をゼロにする旨を示す情報が、
前記RRCにより通知されることを特徴とする請求項1記載の端末装置。 - 端末装置と通信する基地局装置であって、
PTRS信号がマッピングされたPUSCHを受信する受信部と、
前記PUSCHから前記PTRS信号を分離する多重分離部とを、備え、
前記多重分離部は、少なくとも、周波数位置のオフセット、C-RNTI、スケジュールされるリソースブロック数、PTRSの周波数密度に基づいて、
サブキャリアにマッピングされた前記PTRS信号を分離することを特徴とする基地局装置。 - 基地局装置と通信する端末装置の通信方法であって、
疑似ランダム符号により生成されたPTRS信号を、少なくとも、周波数位置のオフセット、C-RNTI、スケジュールされるリソースブロック数、PTRSの周波数密度に基づいてサブキャリアにマッピングし、
前記PTRS信号がマッピングされたPUSCHを送信することを特徴とする通信方法。 - 端末装置と通信する基地局装置の通信方法であって、
PTRS信号がマッピングされたPUSCHを受信し、
前記PUSCHから、少なくとも、周波数位置のオフセット、C-RNTI、スケジュールされるリソースブロック数、PTRSの周波数密度に基づいて、
サブキャリアにマッピングされた前記PTRS信号を分離することを特徴とする通信方法。 - 基地局装置と通信する端末装置に実装される集積回路であって、
疑似ランダム符号により生成されたPTRS信号をリソースエレメントへマッピングする多重手段と、
PUSCHを送信する送信手段とを、備え、
前記多重手段は、前記PTRS信号を、少なくとも、周波数位置のオフセット、C-RNTI、スケジュールされるリソースブロック数、PTRSの周波数密度に基づいてサブキャリアにマッピングし、
前記送信手段は、PTRSがマッピングされたPUSCHを送信することを特徴とする集積回路。 - 端末装置と通信する基地局装置に実装される集積回路であって、
PTRS信号がマッピングされたPUSCHを受信する受信手段と、
前記PUSCHから前記PTRS信号を分離する多重分離手段とを、備え
前記多重分離手段は、少なくとも、周波数位置のオフセット、C-RNTI、スケジュールされるリソースブロック数、PTRSの周波数密度に基づいて、
サブキャリアにマッピングされた前記PTRS信号を分離することを特徴とする集積回路。
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