WO2018199240A1 - 端末装置、基地局装置、および、通信方法 - Google Patents
端末装置、基地局装置、および、通信方法 Download PDFInfo
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- WO2018199240A1 WO2018199240A1 PCT/JP2018/017006 JP2018017006W WO2018199240A1 WO 2018199240 A1 WO2018199240 A1 WO 2018199240A1 JP 2018017006 W JP2018017006 W JP 2018017006W WO 2018199240 A1 WO2018199240 A1 WO 2018199240A1
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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
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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
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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
- H04L5/0001—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
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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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
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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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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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
- H04W72/0446—Resources in time domain, e.g. slots or frames
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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
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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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
- 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
- H04L27/26025—Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
Definitions
- the present invention relates to a terminal device, a base station device, and a communication method.
- LTE Long Term Evolution
- EUTRA Evolved Universal Terrestrial Radio Access
- 3GPP 3rd Generation Partner
- Project 3rd Generation Partner
- a base station apparatus is also called eNodeB (evolved NodeB)
- UE User Equipment
- LTE is a cellular communication system in which a plurality of areas covered by a base station apparatus are arranged in a cell shape. A single base station apparatus may manage a plurality of cells.
- NR New Radio
- eMBB enhanced Mobile BroadBand
- mMTC massive Machine Type Communication
- URLLC Ultra Reliable and Low Latency Communication
- One aspect of the present invention is a terminal device capable of efficiently performing downlink reception, a communication method used for the terminal device, a base station device capable of efficiently performing downlink transmission, and the base station A communication method used in an apparatus is provided.
- a first aspect of the present invention is a terminal apparatus, wherein a receiving unit that monitors PDCCH in a control resource set, and PUSCH scheduled based on an uplink grant included in a DCI format transmitted on the PDCCH
- the PDCCH is composed of one or more CCEs (Control Channel Element), the CCE is composed of 6 REGs (Resource Element Group), and the REG is one
- the OFDM symbol is composed of one PRB
- the CCE is composed of one or more REG bundles that are mapped non-continuously in the frequency domain, and the REG bundle is composed of one or more of the REGs. In the frequency domain of the REG constituting the REG bundle. The number is given separately for the number of OFDM symbols of the CCE.
- a second aspect of the present invention is a base station apparatus, which is scheduled based on a transmission unit that transmits PDCCH in a control resource set and an uplink grant included in a DCI format transmitted on the PDCCH.
- a receiving unit that receives PUSCH wherein the PDCCH is composed of one or a plurality of CCEs (Control Channel Element), the CCE is composed of six REGs (Resource Element Group), and the REG is 1 Composed of one PRB in one OFDM symbol, the CCE is composed of one or more REG bundles that are mapped non-continuously in the frequency domain, and the REG bundle is composed of one or more of the REGs Configured in the frequency domain of the REG constituting the REG bundle. The number is given separately for the number of OFDM symbols of the CCE.
- a third aspect of the present invention is a communication method used for a terminal apparatus, based on a step of monitoring a PDCCH in a control resource set and an uplink grant included in a DCI format transmitted on the PDCCH.
- the PDCCH is composed of one or more CCEs (Control Channel Element)
- the CCE is composed of six REGs (Resource Element Group)
- the REG Is composed of one PRB in one OFDM symbol
- the CCE is composed of one or more REG bundles that are non-contiguously mapped in the frequency domain
- the REG bundle is one or more of the Consists of REG and constitutes the REG bundle
- the number in the frequency domain of the REG is given individually with respect to the number of OFDM symbols of the CCE.
- a fourth aspect of the present invention is a communication method used in a base station apparatus, the step of transmitting a PDCCH in a control resource set, and an uplink grant included in a DCI format transmitted on the PDCCH.
- Receiving a PUSCH scheduled based on the PDCCH wherein the PDCCH is composed of one or more CCEs (Control Channel Element), and the CCE is composed of 6 REGs (Resource Element Group), A REG is composed of one PRB in one OFDM symbol, the CCE is composed of one or more REG bundles that are mapped non-continuously in the frequency domain, and the REG bundle is composed of one or more Consists of the REG and forms the REG bundle
- the number in the frequency domain of the REG is given individually with respect to the number of OFDM symbols of the CCE.
- the terminal device can efficiently perform downlink reception. Further, the base station apparatus can efficiently perform downlink transmission.
- FIG. 1 is a conceptual diagram of a wireless communication system according to one aspect of 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 the terminal device 1.
- radio parameters related to communication between the terminal device 1 and the base station device 3
- at least some radio parameters are also referred to as numerology.
- the radio parameters include at least a part of a subcarrier interval, an OFDM symbol length, a subframe length, a slot length, and a minislot length.
- the subcarrier interval can be classified into two types: a reference subcarrier interval (Reference SCS, Reference Numberology), and a subcarrier interval (Actual SCS, Actual Numberology) for a communication method used for actual wireless communication. Good.
- the reference subcarrier spacing may be used to determine at least some of the radio parameters.
- the reference subcarrier interval is used to set the length of the subframe.
- the reference subcarrier interval is, for example, 15 kHz.
- the subcarrier interval used for actual wireless communication is a communication method used for no communication between the terminal device 1 and the base station device 3 (for example, OFDM: Orthogonal Division Multiplex, OFDMA: Orthogonal Division Multiple Access, It is one of the radio parameters for SC-FDMA: Single Carrier-Frequency Division Multiple Access, DFT-s-OFDM: Discrete Fourier Transform-spread-OFDM).
- OFDM Orthogonal Division Multiplex
- OFDMA Orthogonal Division Multiple Access
- SC-FDMA Single Carrier-Frequency Division Multiple Access
- DFT-s-OFDM Discrete Fourier Transform-spread-OFDM
- the reference subcarrier interval is also referred to as a first subcarrier interval.
- the subcarrier interval used for actual wireless communication is also referred to as a second subcarrier interval.
- FIG. 2 is an example showing configurations of a radio frame, a subframe, and a slot according to an aspect of the present embodiment.
- the slot length is 0.5 ms
- the subframe length is 1 ms
- the radio frame length is 10 ms.
- a slot may be a unit of resource allocation in the time domain.
- the slot may be a unit to which one transport block is mapped.
- a transport block may be mapped to one slot.
- the transport block is a unit of data transmitted within a predetermined interval (for example, transmission time interval (TTI)) defined by an upper layer (for example, MAC: Media Access Control). May be.
- TTI transmission time interval
- MAC Media Access Control
- the slot length may be given by the number of OFDM symbols.
- the number of OFDM symbols may be 7 or 14.
- the length of the slot may be given based at least on the length of the OFDM symbol.
- the length of the OFDM symbol may vary based at least on the second subcarrier spacing. Further, the length of the OFDM symbol may be given based at least on the number of points of Fast Fourier Transform (FFT) used for generating the OFDM symbol.
- FFT Fast Fourier Transform
- the length of the OFDM symbol may include the length of a cyclic prefix (CP) added to the OFDM symbol.
- CP cyclic prefix
- the OFDM symbol may be referred to as a symbol.
- OFDM frequency division multiple access
- SC-FDMA symbols and / or DFT-s-OFDM symbols are also referred to as OFDM symbols.
- the length of the slot may be 0.25 ms, 0.5 ms, 1 ms, 2 ms, and 3 ms.
- OFDM includes SC-FDMA or DFT-s-OFDM.
- OFDM includes a multi-carrier communication scheme to which waveform shaping (Pulse Shape), PAPR reduction, out-of-band radiation reduction, filtering, and / or phase processing (for example, phase rotation) is applied.
- the multi-carrier communication scheme may be a communication scheme that generates / transmits a signal in which a plurality of subcarriers are multiplexed.
- the length of the subframe may be 1 ms. Also, the length of the subframe may be given based on the first subcarrier interval. For example, when the first subcarrier interval is 15 kHz, the length of the subframe may be 1 ms.
- a subframe may include one or more slots.
- the radio frame may be given by the number of subframes.
- the number of subframes for a radio frame may be 10, for example.
- FIG. 3 is a diagram illustrating a configuration example of a slot and a mini-slot according to one aspect of the present embodiment.
- the number of OFDM symbols constituting the slot is seven.
- the minislot may be configured by the number of OFDM symbols that is smaller than the number of OFDM symbols that configure the slot.
- the minislot may be shorter than the slot.
- FIG. 3 shows minislot # 0 to minislot # 5 as an example of the configuration of the minislot.
- a minislot may be composed of one OFDM symbol, as indicated by minislot # 0.
- the minislot may be composed of two OFDM symbols as shown in minislots # 1 to # 3.
- a gap may be inserted between the two minislots, as indicated by minislot # 1 and minislot # 2.
- the minislot may be configured across the boundary between the slot # 0 and the slot # 1, as indicated by the minislot # 5. That is, the minislot may be configured across the slot boundary.
- the minislot is also referred to as a subslot.
- the minislot is also referred to as sTTI (short TTI: Transmission Time Interval).
- the slot may be read as a mini-slot.
- a minislot may be configured with the same number of OFDM symbols as the slot.
- a minislot may be configured with a number of OFDMs that is greater than the number of OFDM symbols that make up the slot.
- the length of the minislot time domain may be shorter than the slot.
- the length of the mini-slot time domain may be shorter than one subframe (eg, 1 ms).
- the uplink physical channel is used by the physical layer to transmit information output from the higher layer.
- ⁇ PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- PRACH Physical Random Access Channel
- the PUCCH is used for transmitting uplink control information (UCI).
- the uplink control information includes channel state information (CSI: Channel State Information) of a downlink channel, and a scheduling request (SR: used for requesting PUSCH (UL-SCH: Uplink-Shared Channel) resources for initial transmission.
- CSI Channel State Information
- SR used for requesting PUSCH
- UL-SCH Uplink-Shared Channel
- HARQ-ACK Hybrid Automatic Repeat ACK knowledge for Physical Downlink Shared Channel.
- HARQ-ACK indicates ACK (acknowledgement) or NACK (negative-acknowledgement).
- HARQ-ACK is also referred to as HARQ feedback, HARQ information, HARQ control information, and ACK / NACK.
- Channel state information includes at least a channel quality indicator (CQI: Channel Quality Indicator) and a rank indicator (RI: Rank Indicator).
- the channel quality indicator may include a precoder matrix indicator (PMI: Precoder Matrix Indicator).
- CQI is an index related to channel quality (propagation strength)
- PMI is an index indicating the precoder.
- the RI is an index indicating the transmission rank (or the number of transmission layers).
- PUSCH is used to transmit uplink data (TB, MAC PDU, UL-SCH, PUSCH).
- the PUSCH may be used to transmit HARQ-ACK and / or channel state information along with uplink data. Also, the PUSCH may be used to transmit only channel state information or only HARQ-ACK and channel state information.
- the PUSCH is used for transmitting the random access message 3.
- PRACH is used for transmitting a random access preamble (random access message 1).
- PRACH performs initial connection establishment (initial connection establishment) procedure, handover procedure, connection re-establishment procedure, synchronization (timing adjustment) for transmission of uplink data, and PUSCH (UL-SCH) resource request. Used to indicate.
- the random access preamble may be used for notifying the base station apparatus 3 of an index (random access preamble index) given from an upper layer of the terminal apparatus 1.
- the random access preamble may be given by cyclically shifting the Zadoff-Chu sequence corresponding to the physical root sequence index u.
- the Zadoff-Chu sequence may be generated based on the physical root sequence index u.
- a plurality of random access preambles may be defined.
- the random access preamble may be specified based on at least an index of the random access preamble. Different random access preambles corresponding to different indexes of the random access preamble may correspond to different combinations of physical root sequence index u and cyclic shift.
- the physical root sequence index u and the cyclic shift may be given based at least on information included in the system information.
- the physical root sequence index u may be an index for identifying a sequence included in the random access preamble.
- the random access preamble may be identified based at least on the physical root sequence index u.
- uplink physical signals are used in uplink wireless communication.
- the uplink physical signal may not be used to transmit information output from the upper layer, but is used by the physical layer.
- Uplink reference signal (UL RS: Uplink Reference Signal)
- UL RS Uplink Reference Signal
- at least the following two types of uplink reference signals may be used.
- SRS (Sounding Reference Signal) DMRS relates to transmission of PUSCH and / or PUCCH.
- DMRS is multiplexed with PUSCH or PUCCH.
- the base station apparatus 3 uses DMRS to perform propagation channel correction for PUSCH or PUCCH.
- transmitting both PUSCH and DMRS is simply referred to as transmitting PUSCH.
- transmitting both PUCCH and DMRS is simply referred to as transmitting PUCCH.
- SRS may not be related to transmission of PUSCH or PUCCH.
- the base station apparatus 3 may use SRS for measuring the channel state.
- the SRS may be transmitted at the end of a subframe or slot in an uplink slot, or in a predetermined number of OFDM symbols from the end.
- the following downlink physical channels are used in downlink wireless communication from the base station apparatus 3 to the terminal apparatus 1.
- the downlink physical channel is used by the physical layer to transmit information output from the higher layer.
- ⁇ PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- MIB Master Information Block, BCH, Broadcast Channel
- the PBCH may be transmitted based on a predetermined transmission interval. For example, the PBCH may be transmitted at an interval of 80 ms. The content of information included in the PBCH may be updated every 80 ms.
- the PBCH may be composed of 288 subcarriers.
- the PBCH may be configured to include 2, 3, or 4 OFDM symbols.
- the MIB may include information related to the identifier (index) of the synchronization signal.
- the MIB may include information indicating at least a part of a slot number, a subframe number, and a radio frame number in which the PBCH is transmitted.
- the PDCCH is used to transmit downlink control information (DCI: Downlink Control Information).
- DCI Downlink Control Information
- the downlink control information is also called a DCI format.
- the downlink control information may include at least either a downlink grant or an uplink grant.
- the downlink grant is also referred to as a downlink assignment or a downlink allocation.
- One downlink grant is used at least for scheduling of one PDSCH in one serving cell.
- the downlink grant is used at least for scheduling the PDSCH in the same slot as the slot in which the downlink grant is transmitted.
- One uplink grant is used at least for scheduling one PUSCH in one serving cell.
- control resource sets are set for searching for PDCCH.
- the terminal device 1 tries to receive the PDCCH in the set control resource set. Details of the control resource set will be described later.
- PDSCH is used for transmitting downlink data (DL-SCH, PDSCH).
- the PDSCH is used at least for transmitting the random access message 2 (random access response).
- the PDSCH is used at least for transmitting system information including parameters used for initial access.
- the downlink physical signal may not be used for transmitting information output from the higher layer, but is used by the physical layer.
- ⁇ Synchronization signal (SS: Synchronization signal) -Downlink reference signal (DL RS: Downlink Reference Signal)
- DL RS Downlink Reference Signal
- the synchronization signal is used for the terminal device 1 to synchronize the downlink frequency domain and time domain.
- the synchronization signal includes PSS (Primary Synchronization Signal) and SSS (Second Synchronization Signal).
- the downlink reference signal is used for the terminal device 1 to correct the propagation path of the downlink physical channel.
- the downlink reference signal is used for the terminal device 1 to calculate downlink channel state information.
- DMRS DeModulation Reference Signal
- Shared RS Shared Reference Signal
- DMRS corresponds to transmission of PDCCH and / or PDSCH.
- DMRS is multiplexed on PDCCH or PDSCH.
- the terminal device 1 may use DMRS corresponding to the PDCCH or the PDSCH in order to perform propagation channel correction of the PDCCH or PDSCH.
- the transmission of both the PDCCH and the DMRS corresponding to the PDCCH is simply referred to as the transmission of the PDCCH.
- the transmission of the PDSCH and the DMRS corresponding to the PDSCH together is simply referred to as the transmission of the PDSCH.
- Shared RS may support at least PDCCH transmission.
- the Shared RS may be multiplexed on the PDCCH.
- the terminal device 1 may use Shared RS to perform PDCCH propagation path correction.
- transmission of both PDCCH and Shared RS is also simply referred to as PDCCH transmission.
- the DMRS may be an RS that is individually set in the terminal device 1.
- the DMRS sequence may be given based at least on parameters individually set in the terminal device 1.
- the DMRS may be transmitted separately for PDCCH and / or PDSCH.
- the Shared RS may be an RS that is commonly set in the plurality of terminal devices 1.
- the Shared RS sequence may be given regardless of the parameters individually set in the terminal device 1.
- the Shared RS sequence may be given based on at least a part of a slot number, a minislot number, and a cell ID (identity).
- the Shared RS may be an RS that is transmitted regardless of whether the PDCCH and / or PDSCH is transmitted.
- the downlink physical channel and downlink physical signal are also referred to as downlink signals.
- the uplink physical channel and the uplink physical signal are also referred to as an uplink signal.
- the downlink physical channel and the uplink physical channel are collectively referred to as a physical channel.
- the downlink physical signal and the 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: Medium Access Control) layer is called a transport channel.
- the unit of the transport channel used in the MAC layer is also called a transport block or a MAC PDU.
- HARQ Hybrid Automatic Repeat reQuest
- the transport block is a unit of data that the MAC layer delivers to the physical layer.
- transport blocks are mapped to codewords, and modulation processing is performed for each codeword.
- the base station device 3 and the terminal device 1 exchange (transmit / receive) signals in a higher layer.
- the base station apparatus 3 and the terminal apparatus 1 are also referred to as RRC signaling (RRC message: Radio Resource Control message, RRC information: Radio Resource Control) in the radio resource control (RRC: Radio Resource Control) layer. May be.
- RRC signaling RRC message: Radio Resource Control message
- RRC information Radio Resource Control
- RRC Radio Resource Control
- the base station device 3 and the terminal device 1 may transmit and receive MAC CE (Control Element) in the MAC layer.
- MAC CE Control Element
- RRC signaling and / or MAC CE are also referred to as higher layer signaling.
- the PUSCH and PDSCH are used at least for transmitting RRC signaling and MAC CE.
- the RRC signaling transmitted from the base station apparatus 3 on the PDSCH may be common signaling for a plurality of terminal apparatuses 1 in the cell. Signaling common to a plurality of terminal devices 1 in a cell is also referred to as common RRC signaling.
- the RRC signaling transmitted from the base station device 3 through the PDSCH may be dedicated signaling (also referred to as dedicated signaling or UE specific signaling) to a certain terminal device 1. Signaling dedicated to the terminal device 1 is also referred to as dedicated RRC signaling.
- the cell specific parameter may be transmitted using common signaling for a plurality of terminal devices 1 in a cell or dedicated signaling for a certain terminal device 1.
- the UE specific parameter may be transmitted to a certain terminal device 1 using dedicated signaling.
- the PDSCH including dedicated RRC signaling may be scheduled by the PDCCH in the first control resource set.
- BCCH Broadcast Control Channel
- CCCH Common Control Channel
- DCCH Dedicated Control Channel
- BCCH Broadcast Control Channel
- CCCH Common Control Channel
- DCCH Dedicated Control Channel
- BCCH is an upper layer channel used to transmit information common to a plurality of terminal devices 1.
- CCCH is used for the terminal device 1 which is not RRC-connected, for example.
- DCCH Dedicated Control Channel
- DCCH is an upper layer channel used for transmitting individual control information (dedicated control information) to the terminal device 1.
- the DCCH is used for, for example, the terminal device 1 that is RRC connected.
- BCCH in the logical channel may be mapped to BCH, DL-SCH, or UL-SCH in the transport channel.
- the CCCH in the logical channel may be mapped to DL-SCH or UL-SCH in the transport channel.
- the DCCH in the logical channel may be mapped to DL-SCH or UL-SCH in the transport channel.
- UL-SCH in the transport channel is mapped to PUSCH in the physical channel.
- the DL-SCH in the transport channel is mapped to the PDSCH in the physical channel.
- the BCH in the transport channel is mapped to the PBCH in the physical channel.
- control resource set will be described.
- FIG. 4 is a diagram showing an example of control resource set mapping according to one aspect of the present embodiment.
- the control resource set may indicate a time frequency region to which one or more control channels can be mapped.
- the control resource set may be an area where the terminal device 1 attempts to receive the PDCCH.
- the control resource set may be configured by continuous resources (Localized resources).
- the control resource set may be configured by non-contiguous resources (distributed resources).
- control resource set mapping unit may be a resource block.
- control resource set mapping unit may be an OFDM symbol.
- the frequency domain of the control resource set may be the same as the system bandwidth of the serving cell. Further, the frequency domain of the control resource set may be given based at least on the system bandwidth of the serving cell. The frequency domain of the control resource set may be provided based at least on upper layer signaling and / or downlink control information.
- the time domain of the control resource set may be given based at least on higher layer signaling and / or downlink control information.
- the control resource set may include at least one or both of a common control resource set (Common control resource set) and a dedicated control resource set (Dedicated control resource set).
- the common control resource set may be a control resource set that is commonly set for a plurality of terminal devices 1.
- the common control resource set may be provided based at least on MIB, first system information, first system information, common RRC signaling, cell ID, and the like.
- the dedicated control resource set may be a control resource set configured to be used exclusively for the terminal device 1.
- the dedicated control resource set may be provided based at least on dedicated RRC signaling and / or C-RNTI values.
- the control resource set may be a set of control channels (or control channel candidates) monitored by the terminal device 1.
- the control resource set may include a set of control channels (or control channel candidates) monitored by the terminal device 1.
- the control resource set may be configured to include one or a plurality of search areas (search space, SS: Search Space).
- search space search space
- SS Search Space
- the search area includes one or a plurality of PDCCH candidates (PDCCH candidates).
- the terminal device 1 receives the PDCCH candidate included in the search area, and tries to receive the PDCCH.
- the PDCCH candidate is also referred to as a blind detection candidate.
- the search area may include at least one or both of CSS (Common Search Space) and USS (UE-specific Search Space).
- the CSS may be a search area that is set to be shared for a plurality of terminal devices 1.
- the USS may be a search area that includes settings used exclusively for the terminal device 1.
- the CSS may be provided based at least on the MIB, the first system information, the first system information, the common RRC signaling, the cell ID, and the like.
- the USS may be provided based at least on dedicated RRC signaling and / or C-RNTI values.
- the common control resource set may include at least one or both of CSS and USS.
- the dedicated control resource set may include at least one or both of CSS and USS.
- the dedicated control resource set may not include CSS.
- the physical resource in the search area is composed of control channel constituent units (CCE: Control Channel Element).
- CCE Control Channel Element
- the CCE is composed of a predetermined number of resource element groups (REG: Resource Element Group).
- REG Resource Element Group
- the CCE may be configured by 6 REGs.
- the REG may be composed of one OFDM symbol of one PRB (Physical Resource Block).
- PRB Physical Resource Block
- PRB is also simply referred to as RB (Resource Block).
- FIG. 5 is a diagram illustrating an example of resource elements included in a slot according to an aspect of the present embodiment.
- the resource element is a resource defined by one OFDM symbol and one subcarrier.
- the slot includes N symb OFDM symbols.
- the number of subcarriers included in the slot may be given by the product of the number N RB of resource blocks included in the slot and the number of subcarriers N RB SC per resource block.
- a resource block is a group of resource elements in the time domain and the frequency domain.
- the resource block may be used as a resource allocation unit in the time domain and / or the frequency domain.
- N RB SC may be 12.
- N symb may be the same as the number of OFDM symbols included in the subframe. N symb may be the same as the number of OFDM symbols included in the slot.
- N RB may be given based on the cell bandwidth and the first subcarrier spacing. The NRB may be given based on the cell bandwidth and the second subcarrier spacing. Further, N RB is the higher layer signal transmitted from the base station apparatus 3 (e.g., RRC signaling) may be provided on the basis of the like. Moreover, NRB may be given based on description of a specification, etc. Resource elements are identified by an index k for subcarriers and an index l for OFDM symbols.
- FIG. 6 is a diagram illustrating an example of the configuration of one REG according to one aspect of the present embodiment.
- the REG may be configured by one OFDM symbol of one PRB. That is, the REG may be composed of 12 REs that are continuous in the frequency domain. A part of the plurality of REs constituting the REG may be an RE to which downlink control information is not mapped.
- the REG may be configured to include an RE to which downlink control information is not mapped, or may be configured to not include an RE to which downlink control information is not mapped.
- the RE to which downlink control information is not mapped may be an RE to which a reference signal is mapped, may be an RE to which a channel other than the control channel is mapped, or the terminal device may not be mapped to a control channel RE assumed by 1 may be used.
- FIG. 7 is a diagram illustrating a configuration example of the CCE according to one aspect of the present embodiment.
- the CCE may be composed of six REGs.
- the CCE may be configured by continuously mapped REGs (Localized mapping).
- the CCE may be configured by REGs that are mapped non-continuously (Distributed mapping).
- the CCE may be configured by a group of REGs that are mapped non-continuously.
- the REG group includes two REGs.
- CCE may be configured to include one or a plurality of REG groups.
- a group of REGs is also referred to as a REG bundle.
- the terminal device 1 may assume that the precoders applied to the REs in the REG group are the same.
- the terminal apparatus 1 can perform channel estimation assuming that the precoders applied to the REs in the REG group are the same.
- the terminal device 1 may assume that precoders applied to REs between REG groups are not the same. In other words, the terminal device 1 may not assume that the precoders applied to the REs between the REG groups are the same.
- “Between REG groups” may be rephrased as “between two different REG groups”.
- the terminal device 1 can perform channel estimation on the assumption that precoders applied to REs between REG groups are not the same. Details of the REG group will be described later.
- FIG. 8 is a diagram illustrating a configuration example of PDCCH candidates according to one aspect of the present embodiment.
- the CCE is composed of REGs that are continuously mapped as shown in FIG. PDCCH candidates are configured based on CCE.
- FIG. 8 illustrates an example of mapping of PDCCH candidates when a CCE configured by continuously mapped REGs is assumed.
- the PDCCH candidates may be configured by continuously mapped CCEs (Localized mapping).
- the PDCCH candidate may be configured by four CCEs indicated by diagonal lines, may be configured by eight CCEs indicated by lattice lines, or 1 indicated by horizontal lines. You may be comprised by one CCE. Further, as shown in FIG.
- the PDCCH may be configured by CCEs that are mapped non-continuously (Distributed mapping). As shown in FIG. 8B, the PDCCH candidate may be configured by 10 CCEs indicated by diagonal lines, or may be configured by 2 CCEs indicated by lattice lines.
- the number of CCEs constituting the PDCCH candidate is also referred to as an aggregation level (AL).
- Aggregation level set of PDCCH candidates of AL X is referred to as the search area of the aggregation level AL X. That is, the search area of the aggregation level AL X is aggregation level may be configured to include one or more PDCCH candidates of AL X. Further, the search area may include a plurality of aggregation level PDCCH candidates.
- the CSS may include multiple aggregation level PDCCH candidates.
- the USS may also include a plurality of aggregation level PDCCH candidates. The set of aggregation levels of PDCCH candidates included in the CSS and the set of aggregation levels of PDCCH candidates included in the USS may be different.
- the REG group may be used for channel estimation in the terminal device 1.
- the terminal device 1 performs channel estimation for each REG group. This is based on the difficulty of performing channel estimation (eg, MMSE channel estimation, etc.) in the RE for reference signals to which different precoders are applied.
- MMSE is an abbreviation for Minimum Mean Square Error.
- the accuracy of channel estimation varies at least based on the power allocated to the reference signal, the density of the time frequency domain of the RE used for the reference signal, the environment of the radio channel, and the like.
- the accuracy of channel estimation varies based at least on the region of time frequency used for channel estimation.
- a group of REGs may be used as a parameter that sets a region of time frequency used for channel estimation.
- the fact that the REG group is small is that many REG groups are included in one PDCCH candidate.
- the fact that many REG groups are included in one PDCCH candidate is a transmission method (precoder rotation, precoder cycling, etc.) that acquires spatial diversity by applying different precoders to each REG group. Is preferred).
- a single REG group may be configured by REGs in the time domain and / or the frequency domain.
- the REG group in the time domain is suitable for improving channel estimation accuracy and / or reducing reference signals.
- the number of REGs constituting a REG group in the time domain may be 1, 2, 2, 3, or any other value.
- the number of REGs constituting a REG group in the time domain may be given based at least on the number of OFDM symbols included in the control resource set. Further, the number of REGs constituting a REG group in the time domain may be the same as the number of OFDM symbols included in the control resource set.
- the frequency domain REG group contributes to the improvement of channel estimation accuracy.
- the number of REGs constituting a REG group in the frequency domain may be two, three, at least a multiple of 2, or at least a multiple of 3. Good.
- the number of REGs constituting the REG group in the frequency domain may be given based at least on the number of PRBs in the control resource set. Further, the number of REGs constituting the REG group in the frequency domain may be the same as the number of PRBs included in the control resource set.
- the number of REGs constituting a REG group in the frequency domain may be given based at least on the mapping method of PDCCH candidates.
- FIG. 9 is a diagram illustrating an example of a relationship between the number of REGs constituting a REG group and a PDCCH candidate mapping method according to an aspect of the present embodiment.
- PDCCH candidates are mapped to one OFDM symbol, and three REG groups (REG groups) including two REGs are configured. That is, in the example shown in FIG. 9A, one REG group is composed of two REGs.
- the number of REGs constituting the REG group in the frequency domain may include a divisor of the number of PRBs mapped in the frequency direction.
- the number of REGs constituting a group of REGs in the frequency domain may be 1, 2, 3, or 6.
- PDCCH candidates are mapped to 2 OFDM symbols, and three REG groups including two REGs are configured.
- the number of REGs constituting a group of REGs in the frequency domain may be either 1 or 3.
- the number of REGs constituting a group of REGs in the frequency domain may be given based at least on the number of OFDM symbols to which PDCCH candidates are mapped.
- the number of REGs constituting a group of REGs in the frequency domain may be individually set for the number of OFDM symbols to which PDCCH candidates are mapped.
- the number of OFDM symbols to which the PDCCH candidates are mapped may be different based on whether the mapping of the REGs forming the CCE is Time first or Frequency first. That is, the number of REGs constituting the REG group in the frequency domain may be given based at least on the mapping of the REGs constituting the CCE.
- the number of REGs constituting the REG group in the frequency domain may be individually set for the mapping of REGs constituting the CCE.
- the mapping of the REG that constitutes the CCE may be either Time first or Frequency first. Further, the mapping of REGs constituting the CCE may be either continuous mapping or non-continuous mapping.
- the number of REGs constituting a group of REGs in the frequency domain may be given based at least on the number of OFDM symbols to which one CCE is mapped.
- the number of REGs constituting a group of REGs in the frequency domain may be individually set for the number of OFDM symbols to which one CCE is mapped.
- FIG. 10 is a diagram illustrating an example of mapping of REGs constituting the CCE according to one aspect of the present embodiment.
- the CCE is composed of six REGs.
- FIG. 10A shows an example in which REGs constituting the CCE are mapped to Time first. Time first mapping is performed by mapping the REG from the lowest REG index in the time domain to the higher one, and increasing the frequency domain REG index by one when the time domain REG index reaches the maximum. Mapping method.
- FIG. 10 shows an example in which REGs constituting the CCE are mapped to Time first. Time first mapping is performed by mapping the REG from the lowest REG index in the time domain to the higher one, and increasing the frequency domain REG index by one when the time domain REG index reaches the maximum
- Frequency first mapping maps REGs from the lowest REG index in the frequency domain to the higher one, and increases the time domain REG index by one when the frequency domain REG index reaches the maximum. Mapping method.
- the number of REGs constituting a group of REGs in the time domain may be given based at least on the number of OFDM symbols to which PDCCH candidates are mapped.
- the number of REGs constituting a group of REGs in the time domain may be individually set with respect to the number of OFDM symbols to which PDCCH candidates are mapped.
- the number of OFDM symbols to which the PDCCH candidates are mapped may be different based on whether the mapping of the REGs forming the CCE is Time first or Frequency first. That is, the number of REGs constituting a group of REGs in the time domain may be given based at least on the mapping of REGs constituting the CCE.
- the number of REGs constituting a group of REGs in the time domain may be individually set for the mapping of REGs constituting the CCE.
- the mapping of the REG that constitutes the CCE may be Time first or Frequency first. Further, the mapping of REGs constituting the CCE may be continuous mapping or non-continuous mapping.
- the number of REGs constituting a group of REGs in the time domain may be given based at least on the number of OFDM symbols to which one CCE is mapped.
- the number of REGs constituting a group of REGs in the time domain may be individually set for the number of OFDM symbols to which one CCE is mapped.
- the time domain REG group is also suitable for reducing reference signals.
- the reference signal may be included in the front OFDM symbol and / or the rear OFDM symbol.
- the first REG (first REG) in the REG group may include an RE to which no downlink control information is mapped, and REGs other than the first REG in the REG group have downlink control information. It is not necessary to include unmapped REs.
- FIG. 11 is a schematic block diagram showing the configuration of the terminal device 1 of the present embodiment.
- the terminal device 1 includes a wireless transmission / reception unit 10 and an upper layer processing unit 14.
- the wireless transmission / reception unit 10 includes an antenna unit 11, an RF (Radio Frequency) unit 12, and a baseband unit 13.
- the upper layer processing unit 14 includes a medium access control layer processing unit 15 and a radio resource control layer processing unit 16.
- the wireless transmission / reception unit 10 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit.
- the upper layer processing unit 14 outputs the uplink data (transport block) generated by the user operation or the like to the wireless transmission / reception unit 10.
- the upper layer processing unit 14 performs processing of a MAC layer, a packet data integration protocol (PDCP: Packet Data Convergence Protocol) layer, a radio link control (RLC: Radio Link Control) layer, and an RRC layer.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- RRC Radio Link Control
- the medium access control layer processing unit 15 included in the upper layer processing unit 14 performs MAC layer processing.
- the radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing of the RRC layer.
- the radio resource control layer processing unit 16 manages various setting information / parameters of the own device.
- the radio resource control layer processing unit 16 sets various setting information / parameters based on the upper layer signal received from the base station apparatus 3. That is, the radio resource control layer processing unit 16 sets various setting information / parameters based on information indicating various setting information / parameters received from the base station apparatus 3.
- the wireless transmission / reception unit 10 performs physical layer processing such as modulation, demodulation, encoding, and decoding.
- the radio transmission / reception unit 10 separates, demodulates, and decodes the signal received from the base station apparatus 3 and outputs the decoded information to the upper layer processing unit 14.
- the radio transmission / reception unit 10 generates a transmission signal by modulating and encoding data, and transmits the transmission signal to the base station apparatus 3.
- the RF unit 12 converts a signal received via the antenna unit 11 into a baseband signal by orthogonal demodulation (down conversion), and removes unnecessary frequency components.
- the RF unit 12 outputs the processed analog signal to the baseband unit.
- the baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal.
- the baseband unit 13 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal, performs fast Fourier transform (FFT) on the signal from which CP is removed, and outputs a signal in the frequency domain. Extract.
- CP Cyclic Prefix
- FFT fast Fourier transform
- the baseband unit 13 performs inverse fast Fourier transform (IFFT) on the data, generates an OFDM symbol, adds a CP to the generated OFDM symbol, generates a baseband digital signal, and generates a baseband signal. Converts a band digital signal to an analog signal.
- the baseband unit 13 outputs the converted analog signal to the RF unit 12.
- IFFT inverse fast Fourier transform
- the RF unit 12 removes an extra frequency component from the analog signal input from the baseband unit 13 using a low-pass filter, up-converts the analog signal to a carrier frequency, and transmits the signal via the antenna unit 11. To do.
- the RF unit 12 amplifies power. Further, the RF unit 12 may have a function of controlling transmission power.
- the RF unit 12 is also referred to as a transmission power control unit.
- FIG. 12 is a schematic block diagram showing the configuration of the base station apparatus 3 of the present embodiment.
- the base station apparatus 3 includes a radio transmission / reception unit 30 and an upper layer processing unit 34.
- the wireless transmission / reception unit 30 includes an antenna unit 31, an RF unit 32, and a baseband unit 33.
- the upper layer processing unit 34 includes a medium access control layer processing unit 35 and a radio resource control layer processing unit 36.
- the wireless transmission / reception unit 30 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit.
- the upper layer processing unit 34 performs processing of the MAC layer, PDCP layer, RLC layer, and RRC layer.
- the medium access control layer processing unit 35 provided in the upper layer processing unit 34 performs processing of the MAC layer.
- the radio resource control layer processing unit 36 included in the upper layer processing unit 34 performs processing of the RRC layer.
- the radio resource control layer processing unit 36 generates downlink data (transport block), system information, RRC message, MAC CE, etc. arranged on the PDSCH, or obtains it from the upper node and outputs it to the radio transmission / reception unit 30 .
- the radio resource control layer processing unit 36 manages various setting information / parameters of each terminal device 1.
- the radio resource control layer processing unit 36 may set various setting information / parameters for each terminal device 1 via an upper layer signal. That is, the radio resource control layer processing unit 36 transmits / notifies information indicating various setting information / parameters.
- Each of the units denoted by reference numerals 10 to 16 included in the terminal device 1 may be configured as a circuit.
- Each of the parts denoted by reference numerals 30 to 36 included in the base station device 3 may be configured as a circuit.
- the base station device 3 includes a communicable range (or communication area) controlled by the base station device 3.
- the communicable range is divided into one or a plurality of cells (or serving cells, subcells, beams, etc.), and communication with the terminal device 1 can be managed for each cell.
- the terminal device 1 selects at least one cell from a plurality of cells, and tries to establish a connection with the base station device 3.
- RRC connection RRC Connection
- the second state in which the terminal device 1 is not connected to any cell of the base station device 3 is also referred to as RRC idle.
- connection between the terminal device 1 and at least one cell of the base station device 3 is established, but the third state in which some functions are restricted between the terminal device 1 and the base station device 3 is: It is also called RRC suspended.
- RRC interruption is also referred to as RRC inactivity.
- the RRC idle terminal device 1 may try to establish a connection with at least one cell of the base station device 3.
- the cell to which the terminal device 1 tries to connect is also referred to as a target cell.
- FIG. 13 is a diagram illustrating an example of a first initial connection procedure (4-step contention based RACH procedure) according to an aspect of the present embodiment.
- the first initial connection procedure includes at least a part of steps 5101 to 5104.
- Step 5101 is a step in which the terminal device 1 requests a response for initial connection to the target cell via the physical channel.
- Step 5101 is a step in which the terminal device 1 performs initial transmission to the target cell via a physical channel.
- the physical channel may be PRACH, for example.
- the physical channel may be a channel used exclusively for requesting a response for an initial connection.
- the physical channel may be PRACH.
- the message transmitted from the terminal device 1 via the physical channel is also referred to as a random access message 1.
- the random access message 1 may be a random access preamble set by higher layer signaling (upper layer parameters).
- the terminal device 1 performs downlink time-frequency synchronization prior to the execution of step 5101.
- the synchronization signal is used for the terminal device 1 to perform downlink time-frequency synchronization.
- the synchronization signal may be transmitted including the target cell ID (cell ID).
- the synchronization signal may be transmitted including a sequence generated based at least on the cell ID. That the synchronization signal includes the cell ID may be that a sequence of synchronization signals is given based on the cell ID.
- the synchronization signal may be transmitted by applying a beam (or precoder).
- Beams exhibit a phenomenon in which antenna gain varies depending on the direction.
- the beam may be provided based at least on the directivity of the antenna.
- the beam may also be provided based at least on the phase conversion of the carrier signal.
- the beam may also be given by applying a precoder.
- the terminal device 1 receives the PBCH transmitted from the target cell.
- the PBCH may be transmitted including an important information block (MIB: Master Information Block, EIB: Essential Information Block) including important system information used for the terminal device 1 to connect to the target cell.
- the important information block is system information.
- the important information block may include information regarding the number of the radio frame.
- the important information block may include information on a position in a super frame composed of a plurality of radio frames (for example, information indicating at least a part of a system frame number (SFN) in the super frame).
- the PBCH may include an index of the synchronization signal.
- the PBCH may include information related to reception of the PDCCH.
- the important information block may be mapped to BCH in the transport channel.
- the important information block may be mapped to BCCH in the logical channel.
- Information related to reception of PDCCH may include information indicating a control resource set.
- the information indicating the control resource set may include information regarding the number of PRBs to which the control resource set is mapped.
- the information indicating the control resource set may include information indicating the control resource set mapping.
- the information indicating the control resource set may include information related to the number of OFDM symbols to which the control resource set is mapped.
- the information indicating the control resource set may include information indicating the period of the slot to which the control resource set is mapped.
- the terminal device 1 can attempt to receive the PDCCH based at least on the information indicating the control resource set included in the PBCH.
- the information related to reception of PDCCH may include information related to an ID indicating the destination of PDCCH.
- the ID indicating the destination of the PDCCH may be an ID used for scrambling CRC bits added to the PDCCH.
- the ID that indicates the destination of the PDCCH is also called RNTI (Radio Network Temporary Identifier).
- Information related to an ID used for scrambling CRC bits added to the PDCCH may be included.
- the terminal device 1 can attempt to receive the PDCCH based at least on the information related to the ID included in the PBCH.
- RNTI may include SI-RNTI (System Information-RNTI), P-RNTI (Paging-RNTI), C-RNTI (Common-RNTI), Temporary C-RNTI, RA-RNTI (Random Access).
- SI-RNTI is used at least for scheduling of PDSCH transmitted including system information.
- the P-RNTI is used at least for scheduling of a PDSCH that is transmitted including information such as paging information and / or a change notification of system information.
- the C-RNTI is used at least for scheduling user data for the terminal device 1 connected to the RRC.
- the Temporary C-RNTI is used at least for scheduling of the random access message 4.
- Temporary C-RNTI is used at least for scheduling PDSCH including data mapped to CCCH in a logical channel.
- RA-RNTI is used at least for scheduling of random access message 2.
- the information related to reception of PDCCH may include information related to the aggregation level of the search area included in the control resource set.
- the terminal device 1 can determine the search area by specifying the aggregation level of PDCCH candidates to be received based on at least information related to the aggregation level of the search area included in the control resource set included in the PBCH.
- the information related to the reception of PDCCH may include information related to the mapping method of REGs constituting the CCE.
- Information related to the mapping method of the REG constituting the CCE may include information indicating continuous mapping and non-continuous mapping.
- the information related to the mapping method of the REG that configures the CCE may include information indicating whether the mapping method of the REG that configures the CCE is the mapping of the time first or the mapping of the frequency first.
- the information related to reception of PDCCH may include information related to the REG group.
- the information related to the reception of the PDCCH may include information indicating the number of REGs constituting the REG group in the frequency domain.
- the information related to the reception of the PDCCH may include information indicating the number of REGs constituting the REG group in the time domain.
- the information related to the REG group may include at least a part or all of the first setting, the second setting, and the third setting.
- the first setting indicates at least a part or all of the setting 1A to the setting 1H.
- (Setting 1A) The number of REGs constituting a group of REGs in the frequency domain is equal to the number of PRBs constituting the control resource set.
- (Setting 1B) The number of REGs constituting the REG group in the time domain is equal to the number of OFDM symbols constituting the control resource set.
- (Setting 1C) The terminal device 1 assumes that the precoders applied to the physical resources (CCE, REG, etc.) in the control resource set are the same.
- the terminal device 1 assumes that the precoders applied to all physical resources (CCE, REG, etc.) in the control resource set are the same.
- (Setting 1D) The terminal apparatus 1 assumes that a reference signal corresponding to the control resource set is transmitted regardless of whether or not PDCCH is detected in the control resource set. Or the terminal device 1 assumes that the reference signal corresponding to a control resource set is always transmitted.
- (Setting 1E) The reference signal corresponding to the control resource set is used for time-frequency domain tracking (time-frequency domain calibration).
- (Setting 1F) A group of REGs in the frequency domain and / or time domain is configured across at least two CCEs.
- (Setting 1G) The reference signal included in the control resource set is used for higher layer channel measurement.
- (Setting 1H) The number of PDCCH transmission antenna ports included in the control resource set is set to 1, 2, or 4.
- the channel measurement of the upper layer may include, for example, RSRP (Reference Signal Received Power).
- the RS corresponding to the control resource set may be a Shared RS.
- the RS included in the control resource set may be a Shared RS.
- the second setting indicates at least a part or all of the settings 2A to 2C.
- Third setting Indicates that the number of REGs that make up the group of REGs in the frequency domain and / or the number of REGs that make up the group of REGs in the time domain is given based at least on various parameters of the control resource set.
- Various parameters of the control resource set may be included in information related to reception of the PDCCH.
- Various parameters of the control resource set may include the number of PRBs included in the control resource set.
- Various parameters of the control resource set may include the number of OFDM symbols included in the control resource set.
- the various parameters of the control resource set may include a mapping method of REGs constituting the CCE.
- Various parameters of the control resource set may include the number of PDCCH transmission antenna ports included in the control resource set.
- Various parameters of the control resource set may include an aggregation level of search areas included in the control resource set.
- Whether the PDCCH included in the control resource set B is mapped to the RE for the reference signal A corresponding to the control resource set A is determined based on whether the control resource set A has the first setting, the second setting, or It may be given based at least on which of the third settings is applied.
- whether the PDCCH is mapped to the RE for the reference signal A is also based on whether the RE for the reference signal A and the RE used for the PDCCH overlap. Good.
- the PDCCH may not include the reference signal B corresponding to the PDCCH.
- Whether the PDSCH scheduled by the PDCCH included in the control resource set B is mapped to the RE for the reference signal corresponding to the control resource set A is determined based on the first setting in the control resource set A, the second It may be given based at least on whether the setting or the third setting is applied. Further, whether or not the PDSCH is mapped to the RE may be based on whether or not the RE and the RE used for the PDSCH overlap.
- whether the PDSCH is mapped to the RE for the reference signal A is also based on whether the RE for the reference signal A and the RE used for the PDSCH overlap. Good.
- the PDSCH may not include the reference signal B corresponding to the PDSCH.
- the PDCCH included in the control resource set A may not be mapped to the RE for the reference signal corresponding to the control resource set A.
- the PDCCH included in the control resource set A may be mapped to the RE for the reference signal corresponding to the control resource set B.
- the PDCCH included in the control resource set B is the RE for the reference signal corresponding to the PDCCH and / or the reference corresponding to the control resource set A. It does not have to be mapped to the RE for the signal.
- the RE for the reference signal corresponding to the control resource set may be an RE to which the PDCCH included in the control resource set is not mapped.
- the RE for the reference signal corresponding to the PDCCH may be an RE to which the PDCCH is not mapped.
- the PDSCH scheduled by the PDCCH included in the control resource set A is the RE for the reference signal corresponding to the control resource set A and / or the It may not be mapped to RE for the reference signal corresponding to PDSCH.
- the PDSCH scheduled by the PDCCH included in the control resource set A may be mapped to the RE for the reference signal corresponding to the control resource set B.
- the PDSCH scheduled by the PDCCH included in the control resource set B corresponds to the RE for the reference signal corresponding to the PDSCH, the control resource set A
- the RE for the reference signal and / or the RE for the reference signal corresponding to the PDCCH may not be mapped.
- the RE for the reference signal corresponding to the PDSCH may be an RE to which the PDSCH is not mapped.
- the PDCCH included in the control resource set A may not be mapped to the RE for the reference signal corresponding to the PDCCH.
- the PDCCH included in the control resource set A may be mapped to the RE for the reference signal corresponding to the control resource set B.
- the PDCCH included in the control resource set B may not be mapped to the RE for the reference signal corresponding to the PDCCH.
- the PDCCH included in the control resource set B may be mapped to the RE for the reference signal corresponding to the control resource set A.
- the PDSCH scheduled by the PDCCH included in the control resource set A corresponds to the RE for the reference signal corresponding to the PDCCH and / or the PDSCH. May not be mapped to RE for the reference signal to be transmitted.
- the PDSCH scheduled by the PDCCH included in the control resource set A may be mapped to the RE for the reference signal corresponding to the control resource set B.
- the PDSCH scheduled by the PDCCH included in the control resource set B corresponds to the RE for the reference signal corresponding to the PDSCH and / or the PDSCH. May not be mapped to RE for the reference signal to be transmitted.
- the PDSCH scheduled by the PDCCH included in the control resource set B may be mapped to the RE for the reference signal corresponding to the control resource set A.
- the PDCCH included in the control resource set A may not be mapped to the RE for the reference signal corresponding to the PDCCH.
- the PDCCH included in the control resource set A may be mapped to the RE for the reference signal corresponding to the control resource set B.
- the PDCCH included in the control resource set B may not be mapped to the RE for the reference signal corresponding to the PDCCH.
- the PDCCH included in the control resource set B may be mapped to the RE for the reference signal corresponding to the control resource set A.
- the PDSCH scheduled by the PDCCH included in the control resource set A corresponds to the RE for the reference signal corresponding to the PDCCH and / or the PDSCH. May not be mapped to RE for the reference signal to be transmitted.
- the PDSCH scheduled by the PDCCH included in the control resource set A may be mapped to the RE for the reference signal corresponding to the control resource set B.
- the PDSCH scheduled by the PDCCH included in the control resource set B corresponds to the RE for the reference signal corresponding to the PDCCH and / or the PDSCH. May not be mapped to RE for the reference signal to be transmitted.
- the PDSCH scheduled by the PDCCH included in the control resource set B may be mapped to the RE for the reference signal corresponding to the control resource set A.
- the reference signal corresponding to the control resource set may correspond to a plurality of PDCCH candidates included in the control resource set.
- the reference signal corresponding to the control resource set may be used for demodulation of a plurality of PDCCHs included in the control resource set.
- the base station apparatus 3 can transmit PBCH including information related to reception of PDCCH, and instruct the terminal apparatus 1 to monitor the first control resource set.
- the terminal device 1 performs monitoring of the first control resource set based at least on detecting information related to reception of the PDCCH included in the PBCH.
- the first control resource set is used at least for scheduling of the first system information.
- the first system information may include system information important for the terminal device 1 to connect to the target cell.
- the first system information may include information regarding various downlink settings.
- the first system information may include information regarding various settings of the PRACH.
- the first system information may include information related to various uplink settings.
- the first system information may include signal waveform information (OFDM or DFT-s-OFDM) set for transmission of the random access message 3.
- the first system information may include at least a part of system information other than information included in the MIB.
- the first system information may be mapped to BCH in the transport channel.
- the first system information may be mapped to BCCH in the logical channel.
- the first system information may include at least SIB1 (System Information Block type1).
- the first system information may include at least SIB2 (System Information Block type 2).
- the first control resource set may be used for scheduling of the random access message 2.
- SIB1 may include information related to measurement necessary for performing the RRC connection.
- SIB2 may include the information regarding the channel shared and / or shared between the some terminal devices 1 in a cell.
- the terminal apparatus 1 may monitor the PDCCH based at least on information related to reception of the PDCCH.
- the terminal device 1 may monitor the PDCCH based at least on information related to the REG group. Based on at least information related to reception of the PDCCH, it may be given which of the first setting, the second setting, or the third setting is applied for PDCCH monitoring.
- the terminal device 1 may assume a setting applied for monitoring the PDCCH based at least on information related to reception of the PDCCH.
- the first setting, the second setting, or the second setting for monitoring the PDCCH It may be given which of the three settings applies. For example, when the frequency band of the control resource set is given based at least on the synchronization signal and / or the PBCH frequency band, the first setting may be applied for monitoring of the PDCCH. In addition, when the frequency band of the control resource set is the same as the frequency band of the synchronization signal and / or PBCH, the first setting may be applied for monitoring the PDCCH. Further, the third setting may be applied when the frequency band of the control resource set is not based on the synchronization signal and / or the PBCH frequency band.
- the first setting may be applied for monitoring the PDCCH.
- the third setting may be applied when the frequency band of the control resource set is different from the frequency band of the synchronization signal and / or PBCH.
- the first setting, the second setting, or the third setting is applied for PDCCH monitoring based at least on the RNTI used for PDCCH monitoring in the control resource set.
- the first configuration may be applied when at least SI-RNTI is used for PDCCH monitoring in the control resource set.
- the first setting may be applied when at least P-RNTI is used for monitoring PDCCH in the control resource set.
- the first setting may be applied for monitoring the PDCCH when the mapping method of the REG configuring the CCE included in the control resource set is non-contiguous mapping (distributed mapping).
- the third setting may be applied for monitoring of the PDCCH when the mapping method of the REG configuring the CCE included in the control resource set is continuous mapping (localized mapping).
- the first setting may be applied for monitoring the PDCCH when the mapping method of the REG configuring the CCE included in the control resource set is Frequency first.
- the 3rd setting may be applied for PDCCH monitoring.
- a mapping method of REGs constituting CCEs included in the control resource set may be provided based at least on the number of OFDM symbols included in the control resource set. For example, when the number of OFDM symbols included in the control resource set is 1, the mapping method of REGs constituting the CCE included in the control resource set is Frequency First may also be used. Further, when the number of OFDM symbols is larger than 1, the mapping method of the REG constituting the CCE included in the control resource set may be Time first.
- the base station device 3 can transmit the MIB and / or the first system information, and instruct the terminal device 1 to monitor the second control resource set.
- the first system information may include information related to reception of PDCCH.
- the terminal device 1 performs monitoring of the second control resource set based at least on information related to reception of MIB and / or PDCCH included in the first system information.
- the second control resource set may be used to schedule a PDSCH including information for paging information and / or system information change notification.
- the second control resource set and the first control resource set may be the same.
- the base station device 3 can transmit the MIB and / or the first system information and instruct the terminal device 1 to monitor the third control resource set.
- the terminal device 1 performs monitoring of the third control resource set based at least on information related to reception of MIB and / or PDCCH included in the first system information.
- the third control resource set may be used for scheduling the PDSCH including the second system information.
- the second system information may be system information that is not included in the MIB and the first system information.
- the second system information may be transmitted based on at least a request from the terminal device 1.
- the request of the terminal device 1 may be made based at least on the transmission of the random access message 1, the random access message 3, and / or the PUCCH.
- the third control resource set may be the same as the first control resource set and / or the second control resource set.
- Step 5102 is a step in which the base station device 3 makes a response to the random access message 1 to the terminal device 1.
- This response is also referred to as random access message 2.
- the random access message 2 may be transmitted via the PDSCH.
- the PDSCH including the random access message 2 is scheduled by the PDCCH.
- the CRC bits included in the PDCCH may be scrambled by RA-RNTI.
- the random access message 2 may be transmitted including a special uplink grant.
- the special uplink grant is also referred to as a random access response grant.
- the special uplink grant may be included in the PDSCH including the random access message 2.
- the random access response grant may include at least Temporary C-RNTI.
- the base station device 3 can transmit the MIB, the first system information, and / or the second system information, and instruct the terminal device 1 to monitor the fourth control resource set.
- the second system information may include information related to reception of PDCCH.
- the terminal device 1 performs monitoring of the fourth control resource set based at least on information related to reception of the PDCCH included in the MIB, the first system information, and / or the second system information.
- the CRC bits added to the PDCCH may be scrambled by the Temporary C-RNTI.
- the fourth control resource set may be used for scheduling of the random access message 2.
- the fourth control resource set may be the same as the first control resource set, the second control resource set, and / or the third control resource set.
- the fourth control resource set further includes a physical route index u included in the random access message 1 transmitted from the terminal device 1 and / or a resource (PRACH resource) used for transmission of the random access message 1. It may be given based at least.
- the random access message 1 may correspond to monitoring of the fourth control resource set.
- the resource may indicate a time and / or frequency resource. The resource may be given by an index of a resource block and / or an index of a slot (subframe). Time monitoring of the fourth control resource set may be triggered by the random access message 1.
- Step 5103 is a step in which the terminal device 1 transmits an RRC connection request to the target cell.
- the RRC connection request is also referred to as a random access message 3.
- the random access message 3 may be transmitted via a PUSCH scheduled by a random access response grant.
- the random access message 3 may include an ID used for identification of the terminal device 1.
- the ID may be an ID managed in an upper layer.
- the ID may be S-TMSI (SAE Temporary Mobile Subscriber Identity).
- the ID may be mapped to CCCH in the logical channel.
- Step 5104 is a step in which the base station device 3 transmits a collision resolution message to the terminal device 1.
- the collision resolution message is also referred to as a random access message 4.
- the terminal device 1 After transmitting the random access message 3, the terminal device 1 performs monitoring of the PDCCH for scheduling the PDSCH including the random access message 4.
- the random access message 4 may include a collision avoidance ID.
- the collision avoidance ID is used to resolve a collision in which a plurality of terminal apparatuses 1 transmit signals using the same radio resource.
- the collision avoidance ID is also referred to as a UE contention resolution identity.
- the terminal device 1 that has transmitted the random access message 3 including the ID (for example, S-TMSI) used to identify the terminal device 1 monitors the random access message 4 including the collision resolution message.
- the collision avoidance ID included in the random access message 4 is equal to the ID used for identification of the terminal device 1, the terminal device 1 considers that the collision resolution has been completed successfully, and the C-RNTI field Alternatively, the value of Temporary C-RNTI may be set. The terminal device 1 in which the value of Temporary C-RNTI is set in the C-RNTI field is considered to have completed the RRC connection.
- the control resource set for PDCCH monitoring for scheduling the random access message 4 may be the same as the fourth control resource set.
- the base station device 3 can transmit information related to reception of the PDCCH in the random access message 2 and instruct the terminal device 1 to monitor the fifth control resource set.
- the terminal device 1 performs monitoring of the PDCCH based at least on information related to reception of the PDCCH included in the random access message 2.
- the fifth control resource set may be used for scheduling of the random access message 5.
- the terminal device 1 connected by RRC can receive dedicated RRC signaling mapped to DCCH in the logical channel.
- the base station apparatus 3 can transmit dedicated RRC signaling including information related to reception of PDCCH, and instruct the terminal apparatus 1 to monitor the sixth control resource set.
- the terminal device 1 may perform monitoring of the PDCCH based at least on information related to reception of the PDCCH included in the dedicated RRC signaling.
- the sixth control resource set the second setting or the third setting may be applied.
- the physical resources of the sixth control resource set may be given based at least on the C-RNTI.
- the base station apparatus 3 can transmit a random access message 4 including information related to reception of PDCCH, and instruct the terminal apparatus 1 to monitor the sixth control resource set.
- the terminal device 1 may perform monitoring of the sixth control resource set based at least on the information related to reception of the PDCCH. Further, when the random access message 4 does not include information related to reception of PDCCH, the terminal device 1 performs monitoring of USS included in at least one of the first to fifth control resource sets. May be.
- the physical resource for the USS may be provided based at least on C-RNTI.
- the first to fifth control resource sets may be common control resource sets.
- the sixth control resource set may be a dedicated control resource set.
- the information related to reception of PDCCH may include information common to a plurality of control resource sets and information set for each of the plurality of control resource sets. For example, information related to a group of REGs applied to the first to fourth control resource sets may be defined.
- the information related to reception of the PDCCH related to the first control resource set may include information related to the group of REGs, and to receive PDCCH related to the second to fourth control resource sets.
- the related information may not include information related to the REG group.
- Information related to reception of PDCCH related to the first control resource set may be applied to the second to fourth control resource sets.
- information related to the REG group may be individually defined for each of the fifth and sixth control resource sets.
- the information indicating the control resource set may be individually defined for the first to sixth control resource sets.
- the aspect of the present invention takes the following measures. That is, the first aspect of the present invention is a terminal apparatus, comprising a receiving unit that monitors PDCCH in a control resource set, and a decoding unit that decodes the PDCCH, and the PDCCH is configured by one or a plurality of REG groups
- the REG group is composed of a plurality of REGs, and the plurality of REGs in the REG group are transmitted by being multiplied by the same precoder, and the REG group constituting the REG group in the first control resource set is transmitted.
- the number is given based at least on PBCH, and whether the first setting is applied to the first control resource set is given based on information related to reception of PDCCH, and the first setting is
- the number of PRBs included in the first control resource set is the number of REGs constituting the REG group Indicates that the given based on at least, in the second control resource set, the number of the REG constituting the REG group is given at least on the basis of the dedicated RRC signaling.
- whether the PDCCH included in the second control resource set is mapped to a reference signal corresponding to the first control resource set is determined by the REG It is given based at least on whether the first setting is applied to the group.
- the 2nd aspect of this invention is a base station apparatus, Comprising: The encoding part which encodes PDCCH, and the transmission part which transmits PDCCH in a control resource set,
- the said PDCCH is 1 Or a plurality of REG groups, the REG group is composed of a plurality of REGs, and the plurality of REGs in the REG group are transmitted by being multiplied by the same precoder, and in the first control resource set, the REG
- the number of REGs constituting a group is given based at least on PBCH, and whether or not the first setting is applied to the first control resource set is given based on information related to reception of PDCCH.
- the number of the REGs constituting the REG group is included in the first control resource set. It indicates that the given least based on the number of RB, in the second control resource set, the number of the REG constituting the REG group is given at least on the basis of the dedicated RRC signaling.
- whether or not the PDCCH included in the second control resource set is mapped to a reference signal corresponding to the first control resource set is determined by the REG It is given based at least on whether the first setting is applied to the group.
- the base station apparatus 3 related to one aspect of the present invention and the program operating in the terminal apparatus 1 control a CPU (Central Processing Unit) and the like so as to realize the functions of the above-described embodiments related to one aspect of the present invention. It may be a program (a program that causes a computer to function). Information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). Reading, correction, and writing are performed by the CPU as necessary.
- RAM Random Access Memory
- ROMs Read Only Memory
- HDD Hard Disk Drive
- the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.
- the “computer system” here is a computer system built in the terminal device 1 or the base station device 3 and includes hardware such as an OS and peripheral devices.
- the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
- the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line,
- a volatile memory inside a computer system serving as a server or a client may be included and a program that holds a program for a certain period of time.
- the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
- the base station device 3 in the above-described embodiment can be realized as an aggregate (device group) composed of a plurality of devices.
- Each of the devices constituting the device group may include a part or all of each function or each functional block of the base station device 3 according to the above-described embodiment.
- the device group only needs to have one function or each function block of the base station device 3.
- the terminal device 1 according to the above-described embodiment can also communicate with the base station device as an aggregate.
- the base station apparatus 3 in the above-described embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network).
- the base station device 3 in the above-described embodiment may have a part or all of the functions of the upper node for the eNodeB.
- the base station apparatus 3 in the embodiment described above may be NG-RAN (NR Radio Access Network, NextGen Radio Access Network).
- the base station device 3 in the above-described embodiment may have a part or all of the functions of the upper node for gNB (NR NodeB, 5G NodeB).
- the base station device 3 in the above-described embodiment may be 5GC (5G Core Network).
- the base station apparatus 3 in the above-described embodiment may be NGC (NR Core Network, NextGen Core Network).
- a part or all of the terminal device 1 and the base station device 3 in the above-described embodiment may be realized as an LSI that is typically an integrated circuit, or may be realized as a chip set.
- Each functional block of the terminal device 1 and the base station device 3 may be individually chipped, or a part or all of them may be integrated into a chip.
- the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
- an integrated circuit based on the technology can also be used.
- the terminal device is described as an example of the communication device.
- the present invention is not limited to this, and the stationary or non-movable electronic device installed indoors or outdoors,
- the present invention can also be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, 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.
- Terminal device 3 Base station device 10, 30 Radio transmission / reception unit 11, 31 Antenna unit 12, 32 RF unit 13, 33 Baseband unit 14, 34 Upper layer processing unit 15, 35 Medium access control layer Processing unit 16, 36 Radio resource control layer processing unit
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Abstract
Description
本願は、2017年4月26日に日本に出願された特願2017-087101号について優先権を主張し、その内容をここに援用する。
・PUCCH(Physical Uplink Control Channel)
・PUSCH(Physical Uplink Shared Channel)
・PRACH(Physical Random Access Channel)
PUCCHは、上りリンク制御情報(UCI:Uplink Control Information)を送信するために用いられる。上りリンク制御情報は、下りリンクチャネルのチャネル状態情報(CSI:Channel State Information)、初期送信のためのPUSCH(UL-SCH:Uplink-Shared Channel)リソースを要求するために用いられるスケジューリングリクエスト(SR:Scheduling Request)、下りリンクデータ(TB:Transport block、MAC PDU:Medium Access Control Protocol Data Unit、DL-SCH:Downlink-Shared
Channel、PDSCH:Physical Downlink Shared Channel)に対するHARQ-ACK(Hybrid Automatic Repeat request ACKnowledgement)を含む。HARQ-ACKは、ACK(acknowledgement)またはNACK(negative-acknowledgement)を示す。HARQ-ACKを、HARQフィードバック、HARQ情報、HARQ制御情報、および、ACK/NACKとも称する。
・上りリンク参照信号(UL RS:Uplink Reference Signal)
本実施形態において、少なくとも以下の2つのタイプの上りリンク参照信号が少なくとも用いられてもよい。
・DMRS(Demodulation Reference Signal)
・SRS(Sounding Reference Signal)
DMRSは、PUSCH、および/または、PUCCHの送信に関連する。DMRSは、PUSCHまたはPUCCHと多重される。基地局装置3は、PUSCHまたはPUCCHの伝搬路補正を行なうためにDMRSを使用する。以下、PUSCHとDMRSを共に送信することを、単にPUSCHを送信すると称する。以下、PUCCHとDMRSを共に送信することを、単にPUCCHを送信すると称する。
・PBCH(Physical Broadcast Channel)
・PDCCH(Physical Downlink Control Channel)
・PDSCH(Physical Downlink Shared Channel)
PBCHは、端末装置1において共通に用いられるマスターインフォメーションブロック(MIB:Master Information Block、BCH、Broadcast Channel)を報知するために用いられる。PBCHは、所定の送信間隔に基づき送信されてもよい。例えば、PBCHは、80msの間隔で送信されてもよい。PBCHに含まれる情報の中身は、80msごとに更新されてもよい。PBCHは、288サブキャリアにより構成されてもよい。PBCHは、2、3、または、4OFDMシンボルを含んで構成されてもよい。MIBは、同期信号の識別子(インデックス)に関連する情報を含んでもよい。MIBは、PBCHが送信されるスロットの番号、サブフレームの番号、および、無線フレームの番号の少なくとも一部を指示する情報を含んでもよい。
・同期信号(SS:Synchronization signal)
・下りリンク参照信号(DL RS:Downlink Reference Signal)
同期信号は、端末装置1が下りリンクの周波数領域および時間領域の同期をとるために用いられる。同期信号は、PSS(Primary Synchronization Signal)、および、SSS(Second Synchronization Signal)を含む。
・DMRS(DeModulation Reference Signal)
・Shared RS(Shared Reference Signal)
DMRSは、PDCCH、および/または、PDSCHの送信に対応する。DMRSは、PDCCHまたはPDSCHに多重される。端末装置1は、PDCCHまたはPDSCHの伝搬路補正を行なうために該PDCCHまたは該PDSCHと対応するDMRSを使用してもよい。以下、PDCCHと該PDCCHと対応するDMRSが共に送信されることは、単にPDCCHが送信されると呼称される。以下、PDSCHと該PDSCHと対応するDMRSが共に送信されることは、単にPDSCHが送信されると呼称される。
第3の設定は、周波数領域のREGのグループを構成するREG数、および/または、時間領域のREGのグループを構成するREG数が、制御リソースセットの種々のパラメータに少なくとも基づき与えられることを示す。制御リソースセットの種々のパラメータは、PDCCHの受信に関連する情報に含まれてもよい。制御リソースセットの種々のパラメータは、制御リソースセットに含まれるPRB数を含んでもよい。制御リソースセットの種々のパラメータは、制御リソースセットに含まれるOFDMシンボル数を含んでもよい。制御リソースセットの種々のパラメータは、CCEを構成するREGのマッピング方法を含んでもよい。制御リソースセットの種々のパラメータは、制御リソースセットに含まれるPDCCHの送信アンテナポート数を含んでもよい。制御リソースセットの種々のパラメータは、制御リソースセットに含まれる探索領域の集約レベルを含んでもよい。
firstであってもよい。また、OFDMシンボル数が1より大きい場合に、制御リソースセットに含まれるCCEを構成するREGのマッピング方法はTime firstであってもよい。
3 基地局装置
10、30 無線送受信部
11、31 アンテナ部
12、32 RF部
13、33 ベースバンド部
14、34 上位層処理部
15、35 媒体アクセス制御層処理部
16、36 無線リソース制御層処理部
Claims (8)
- 制御リソースセットにおいてPDCCHをモニタする受信部と、
前記PDCCHで送信されるDCIフォーマットに含まれる上りリンクグラントに基づきスケジューリングされるPUSCHを送信する送信部と、を備え、
前記PDCCHは、1つまたは複数のCCE(Control Channel Element)から構成され、
前記CCEは、6つのREG(Resource Element Group)から構成され、前記REGは1つのOFDMシンボルにおける、1つのPRBから構成され、
前記CCEは、周波数領域において非連続的にマッピングされる1つまたは複数のREGバンドルから構成され、
前記REGバンドルは、1つまたは複数の前記REGから構成され、
前記REGバンドルを構成する前記REGの周波数領域における数は、前記CCEのOFDMシンボルの数に対して個別に与えられる
端末装置。 - 前記REGバンドルの時間領域におけるREGの数は、前記制御リソースセットを構成するOFDMシンボルの数に等しい
請求項1に記載の端末装置。 - 第1の設定において、前記PDCCHが含まれる制御リソースセットにおいて適用されるプレコーダが同一であり、第2の設定において、前記REGバンドル内において適用されるプレコーダが同一である
請求項1に記載の端末装置。 - 制御リソースセットにおいてPDCCHを送信する送信部と、
前記PDCCHで送信されるDCIフォーマットに含まれる上りリンクグラントに基づきスケジューリングされるPUSCHを受信する受信部と、を備え、
前記PDCCHは、1つまたは複数のCCE(Control Channel Element)から構成され、
前記CCEは、6つのREG(Resource Element Group)から構成され、前記REGは1つのOFDMシンボルにおける、1つのPRBから構成され、
前記CCEは、周波数領域において非連続的にマッピングされる1つまたは複数のREGバンドルから構成され、
前記REGバンドルは、1つまたは複数の前記REGから構成され、
前記REGバンドルを構成する前記REGの周波数領域における数は、前記CCEのOFDMシンボルの数に対して個別に与えられる
基地局装置。 - 前記REGバンドルの時間領域におけるREGの数は、前記制御リソースセットを構成するOFDMシンボルの数に等しい
請求項4に記載の基地局装置。 - 第1の設定において、前記PDCCHが含まれる制御リソースセットにおいて適用されるプレコーダが同一であり、第2の設定において、前記REGバンドル内において適用されるプレコーダが同一である
請求項4に記載の基地局装置。 - 端末装置に用いられる通信方法であって、
制御リソースセットにおいてPDCCHをモニタするステップと、
前記PDCCHで送信されるDCIフォーマットに含まれる上りリンクグラントに基づきスケジューリングされるPUSCHを送信するステップと、を備え、
前記PDCCHは、1つまたは複数のCCE(Control Channel Element)から構成され、
前記CCEは、6つのREG(Resource Element Group)から構成され、前記REGは1つのOFDMシンボルにおける、1つのPRBから構成され、
前記CCEは、周波数領域において非連続的にマッピングされる1つまたは複数のREGバンドルから構成され、
前記REGバンドルは、1つまたは複数の前記REGから構成され、
前記REGバンドルを構成する前記REGの周波数領域における数は、前記CCEのOFDMシンボルの数に対して個別に与えられる
通信方法。 - 基地局装置に用いられる通信方法であって、
制御リソースセットにおいてPDCCHを送信するステップと、
前記PDCCHで送信されるDCIフォーマットに含まれる上りリンクグラントに基づきスケジューリングされるPUSCHを受信するステップと、を備え、
前記PDCCHは、1つまたは複数のCCE(Control Channel Element)から構成され、
前記CCEは、6つのREG(Resource Element Group)から構成され、前記REGは1つのOFDMシンボルにおける、1つのPRBから構成され、
前記CCEは、周波数領域において非連続的にマッピングされる1つまたは複数のREGバンドルから構成され、
前記REGバンドルは、1つまたは複数の前記REGから構成され、
前記REGバンドルを構成する前記REGの周波数領域における数は、前記CCEのOFDMシンボルの数に対して個別に与えられる
通信方法。
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EP18791703.4A EP3618534B1 (en) | 2017-04-26 | 2018-04-26 | Terminal device, base station device, and communication method |
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CN110574459A (zh) | 2019-12-13 |
RU2019133293A (ru) | 2021-05-26 |
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US20200076559A1 (en) | 2020-03-05 |
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