WO2015190312A1 - 基地局装置、端末装置および通信方法 - Google Patents
基地局装置、端末装置および通信方法 Download PDFInfo
- Publication number
- WO2015190312A1 WO2015190312A1 PCT/JP2015/065506 JP2015065506W WO2015190312A1 WO 2015190312 A1 WO2015190312 A1 WO 2015190312A1 JP 2015065506 W JP2015065506 W JP 2015065506W WO 2015190312 A1 WO2015190312 A1 WO 2015190312A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- information
- crs
- base station
- interference
- terminal device
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims description 22
- 238000000034 method Methods 0.000 title claims description 15
- 238000012545 processing Methods 0.000 claims abstract description 34
- 230000002452 interceptive effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 62
- 230000005540 biological transmission Effects 0.000 description 54
- 238000001514 detection method Methods 0.000 description 20
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 10
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 10
- 230000001629 suppression Effects 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 230000000737 periodic effect Effects 0.000 description 8
- 230000001788 irregular Effects 0.000 description 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000013468 resource allocation Methods 0.000 description 4
- 101001018494 Homo sapiens Pro-MCH Proteins 0.000 description 3
- 102100033721 Pro-MCH Human genes 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 238000007476 Maximum Likelihood Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
-
- 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
-
- 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
-
- 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
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
-
- 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
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
-
- 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
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
-
- 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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
Definitions
- the present invention relates to a base station apparatus, a terminal apparatus and a communication method.
- a communication system such as WCDMA (Wideband Code Division Multiple Access) by 3GPP (Third Generation Partnership Project), Long Term Evolution (LTE), LTE-A (LTE-Advanced), or Worldwide Interoperability for Microwave Access (WiMAX)
- a base station apparatus base station, transmitting station, transmitting point, downlink transmitting apparatus, uplink receiving apparatus, transmitting antenna group, transmitting antenna port group, component carrier, eNodeB) or a transmitting station conforming to the base station apparatus covers
- a communication area can be expanded by providing a cellular configuration in which a plurality of areas are arranged in a cell (Cell) shape. In this cellular configuration, frequency utilization efficiency can be improved by using the same frequency between adjacent cells or sectors.
- a terminal apparatus mobile station apparatus, reception station, reception point, uplink transmission apparatus, downlink reception apparatus, mobile terminal, reception antenna group
- a cell edge cell edge
- a sector edge area Reception antenna port group, UE; User Equipment
- Non-Patent Document 1 an MMSE-IRC receiver (Minimum Mean Square Error-Interference Rejection Combining), an interference cancellation receiver (Interference Cancellation Receiver), an interference suppression receiver (Interference Suppression Receiver) as an advanced receiver, An MLD receiver (Maximal Likelihood Detection Receiver) is shown.
- MMSE-IRC receiver Minimum Mean Square Error-Interference Rejection Combining
- Interference Cancellation Receiver Interference Cancellation Receiver
- Interference Suppression Receiver Interference Suppression Receiver
- MLD receiver Maximum Likelihood Detection Receiver
- MIMO multi-input multi-output
- the advanced receiver can improve frequency utilization efficiency by using it for suppression of inter-stream interference (inter-layer interference, inter-antenna interference) generated in spatial multiplexing transmission.
- inter-stream interference inter-layer interference, inter-antenna interference
- the advanced receiver needs knowledge and information (eg, parameters for demodulation) about the interference signal to reduce interference.
- knowledge and information eg, parameters for demodulation
- the base station apparatus transmits knowledge or information on interference signals to the terminal apparatus, there is a problem that the signaling overhead increases.
- the terminal apparatus needs to estimate the information of the interference signal, and there is a problem that the amount of calculation of the terminal apparatus increases.
- the present invention has been made in view of such circumstances, and an object thereof is to provide a base station apparatus, a terminal apparatus and a communication method capable of reducing interference by knowledge and information of an effective interference signal. It is to do.
- configurations of a terminal device and an integrated circuit according to the present invention are as follows.
- the base station apparatus of the present invention is a base station apparatus that communicates with a terminal apparatus, and is used to reduce interference from a cell-specific reference signal with the first interference information used by the terminal apparatus and / or at least downstream. And a higher layer configured to the terminal device to set second interference information used by the terminal device to reduce interference from a link shared channel, wherein the first interference information includes one or more first aids.
- the second interference information is set only when the first interference information is set.
- each of the first support information includes a first cell identifier for the cell-specific reference signal
- each of the second support information is the downlink And a second cell identifier for the shared channel.
- the second support information is associated with the first support information including the first cell identifier having the same value as the second cell identifier.
- the first interference information and the second interference information are not set simultaneously.
- the second interference information is further used by the terminal apparatus to reduce interference from a cell-specific reference signal.
- each of the first support information includes a first cell identifier for the cell specific reference signal, and each of the second support information is the cell specific.
- a first cell identifier for a reference signal and a second cell identifier for the downlink shared channel are included.
- each of the first support information includes a first cell identifier for the cell specific reference signal, and each of the second support information is the cell specific.
- a terminal apparatus is a terminal apparatus that communicates with a base station apparatus, the first interference information used by the terminal apparatus to reduce interference from a cell-specific reference signal, and / or at least a downlink Second interference information used by the terminal apparatus to reduce interference from a shared channel, comprising an upper layer configured from the base station apparatus, the first interference information includes one or more first The second interference information includes one or more second support information.
- the second interference information is set only when the first interference information is set.
- each of the first support information includes a first cell identifier for the cell-specific reference signal
- each of the second support information is the downlink share. Contains a second cell identifier for the channel.
- the second support information is associated with the first support information including the first cell identifier having the same value as the second cell identifier.
- the first interference information and the second interference information are not set simultaneously.
- the second interference information is further used by the terminal device to reduce interference from a cell specific reference signal.
- each of the first support information includes a first cell identifier for the cell-specific reference signal
- each of the second support information is a cell-specific reference.
- a first cell identifier for a signal and a second cell identifier for the downlink shared channel are included.
- each of the first support information includes a first cell identifier for the cell-specific reference signal, and each of the second support information is a cell-specific reference. And a second cell identifier for the signal and the downlink shared channel.
- the integrated circuit implemented in the terminal device of the present invention comprises: first interference information used by the terminal device to reduce interference from a cell-specific reference signal and / or at least interference from the downlink shared channel A second interference information to be used by the terminal device to reduce the interference, which is set from the base station apparatus, the first interference information includes one or more first support information, and The second interference information includes one or more second support information.
- interference can be effectively reduced in a wireless environment where interference signals arrive.
- the communication system in this embodiment includes a base station apparatus (transmission apparatus, cell, transmission point, transmission antenna group, transmission antenna port group, component carrier, eNodeB) and terminal apparatus (terminal, mobile terminal, reception point, reception terminal, reception) Apparatus, receiving antenna group, receiving antenna port group, UE).
- a base station apparatus transmission apparatus, cell, transmission point, transmission antenna group, transmission antenna port group, component carrier, eNodeB
- terminal apparatus terminal, mobile terminal, reception point, reception terminal, reception Apparatus, receiving antenna group, receiving antenna port group, UE.
- X / Y includes the meaning of "X or Y”. In the present embodiment, “X / Y” includes the meaning of "X and Y”. In the present embodiment, “X / Y” includes the meaning of "X and / or Y”.
- FIG. 1 is a diagram showing an example of a communication system according to the present embodiment.
- the communication system in the present embodiment includes base station apparatuses 1A and 1B and terminal apparatuses 2A, 2B and 2C.
- coverage 1-1 is a range (communication area) in which base station apparatus 1A can be connected to a terminal apparatus.
- coverage 1-2 is a range (communication area) in which the base station device 1B can be connected to the terminal device.
- the terminal devices 2A and 2B will also be described as the terminal device 2.
- the received signal at the terminal apparatus 2 is its own terminal.
- a desired signal addressed to a device also referred to as a first terminal device
- a signal addressed to a terminal device also referred to as a second terminal device
- the received signal at the terminal device 2A is a desired signal addressed to the own terminal device transmitted from the base station device 1A, a signal addressed to the terminal device 2B, and a signal addressed to the terminal device 2C transmitted from the base station device 1B.
- an interference signal is included.
- the reception signal in the terminal device 2B is interference that is a desired signal addressed to the own terminal device transmitted from the base station device 1A, a signal addressed to the terminal device 2A, and a signal addressed to the terminal device 2C transmitted from the base station device 1B. And a signal is included.
- the terminal apparatus receives inter-user interference or if the base station apparatus receives inter-cell interference from another base station apparatus by spatially multiplexing a plurality of terminal apparatuses. It is not limited to the communication system of FIG.
- the inter-user interference and the inter-cell interference do not have to be received at the same time, and the present invention includes both the case of receiving only the inter-user interference and the case of receiving only the inter-cell interference.
- the following uplink physical channels are used in uplink radio communication from the terminal device 2 to the base station device 1A.
- the uplink physical channel is used to transmit information output from the upper layer.
- -PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- PRACH Physical Random Access Channel
- the PUCCH is used to transmit uplink control information (UCI).
- the uplink control information includes ACK (a positive acknowledgment) or NACK (a negative acknowledgment) (ACK / NACK) for downlink data (downlink transport block, downlink-shared channel: DL-SCH).
- ACK / NACK for downlink data is also referred to as HARQ-ACK or HARQ feedback.
- uplink control information includes channel state information (CSI) for downlink.
- the uplink control information includes a scheduling request (SR) used to request a resource of an uplink shared channel (UL-SCH).
- the channel state information corresponds to a rank index RI specifying a suitable spatial multiplexing number, a precoding matrix index PMI specifying a suitable precoder, and a channel quality index CQI specifying a suitable transmission rate.
- the channel quality indicator CQI may be a suitable modulation scheme (for example, QPSK, 16 QAM, 64 QAM, 256 QAM, etc.) in a predetermined band (details will be described later), and a code rate. it can.
- the CQI value can be an index (CQI Index) determined by the change scheme or the coding rate.
- the CQI value may be determined in advance by the system.
- the rank index and the precoding quality index may be determined in advance by a system.
- the rank index or the precoding matrix index may be an index defined by a spatial multiplexing number or precoding matrix information.
- the values of the rank index, the precoding matrix index, and the channel quality index CQI are collectively referred to as a CSI value.
- the PUSCH is used to transmit uplink data (uplink transport block, UL-SCH). Also, PUSCH may be used to transmit ACK / NACK and / or channel state information along with uplink data. Also, PUSCH may be used to transmit only uplink control information.
- PUSCH is used to transmit an RRC message.
- the RRC message is information / signal processed in a Radio Resource Control (RRC) layer.
- PUSCH is used to transmit MAC CE (Control Element).
- the MAC CE is information / signal to be processed (sent) in a Medium Access Control (MAC) layer.
- the power headroom may be included in MAC CE and reported via PUSCH. That is, the field of MAC CE may be used to indicate the level of power headroom.
- the PRACH is used to transmit a random access preamble.
- an uplink reference signal (UL RS) is used as an uplink physical signal.
- the uplink physical signal is not used to transmit information output from the upper layer, but is used by the physical layer.
- the uplink reference signal includes a DMRS (Demodulation Reference Signal) and an SRS (Sounding Reference Signal).
- DMRS relates to PUSCH or PUCCH transmission.
- the base station apparatus 1A uses DMRS to perform PUSCH or PUCCH channel correction.
- the SRS is not related to PUSCH or PUCCH transmission.
- the base station device 1A uses SRS to measure uplink channel conditions.
- the downlink physical channel is used to transmit information output from the upper layer.
- PBCH Physical Broadcast Channel
- PCFICH Physical Control Format Indicator Channel
- PHICH Physical Hybrid automatic repeat request Indicator Channel; HARQ indicated channel
- PDCCH Physical Downlink Control Channel
- EPDCCH Enhanced Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- the PBCH is used to broadcast a master information block (MIB, Broadcast Channel: BCH) commonly used in the terminal device 2.
- MIB Master Information block
- BCH Broadcast Channel
- the PCFICH is used to transmit information indicating a region (for example, the number of OFDM symbols) used for transmission of the PDCCH.
- the PHICH is used to transmit an ACK / NACK to uplink data (transport block, codeword) received by the base station device 1A. That is, PHICH is used to transmit an HARQ indicator (HARQ feedback) indicating ACK / NACK for uplink data. Also, ACK / NACK is also referred to as HARQ-ACK.
- the terminal device 2 notifies the upper layer of the received ACK / NACK.
- the ACK / NACK is an ACK indicating that it was correctly received, a NACK indicating that it did not receive correctly, and DTX indicating that there was no corresponding data. Also, when there is no PHICH for uplink data, the terminal device 2 notifies the upper layer of ACK.
- the PDCCH and the EPDCCH are used to transmit downlink control information (DCI).
- DCI downlink control information
- a plurality of DCI formats are defined for transmission of downlink control information. That is, fields for downlink control information are defined in DCI format and mapped to information bits.
- DCI format 1A used for scheduling of one PDSCH (transmission of one downlink transport block) in one cell is defined as the DCI format for downlink.
- the DCI format for downlink includes downlink control information such as information on resource allocation of PDSCH, information on modulation and coding scheme (MCS) for PDSCH, and TPC commands for PUCCH.
- the DCI format for downlink is also referred to as downlink grant (or downlink assignment).
- DCI format 0 used for scheduling of one PUSCH (transmission of one uplink transport block) in one cell is defined as the DCI format for uplink.
- the DCI format for uplink includes uplink control information such as information on resource allocation of PUSCH, information on MCS for PUSCH, TPC command for PUSCH, and the like.
- the DCI format for uplink is also referred to as uplink grant (or uplink assignment).
- the DCI format for uplink can be used to request (CSI request) downlink channel state information (CSI: Channel State Information, also referred to as reception quality information).
- the channel state information includes a rank indicator RI (Rank Indicator) for specifying a suitable spatial multiplexing number, a precoding matrix indicator PMI (Precoding Matrix Indicator) for specifying a suitable precoder, and a channel quality indicator CQI (for specifying a suitable transmission rate).
- RI Rank Indicator
- PMI Precoding Matrix Indicator
- CQI for specifying a suitable transmission rate.
- Channel Quality Indicator etc. correspond.
- the DCI format for uplink can be used for configuration to indicate uplink resources that map channel state information reports (CSI feedback reports) that the terminal apparatus feeds back to the base station apparatus.
- channel state information reporting may be used for configuration to indicate uplink resources that periodically report channel state information (Periodic CSI).
- the channel state information report can be used for mode setting (CSI report mode) to report channel state information periodically.
- channel state information reporting can be used for configuration to indicate uplink resources reporting irregular channel state information (Aperiodic CSI).
- Channel state information report can be used for mode setting (CSI report mode) which reports channel state information irregularly.
- the base station apparatuses 100-1 and 100-2 can set either the periodic channel state information report or the irregular channel state information report. Also, the base station devices 100-1 and 100-2 can set both the periodic channel state information report and the irregular channel state information report.
- the DCI format for uplink can be used for setting indicating the type of channel state information report that the terminal apparatus feeds back to the base station apparatus.
- Types of channel state information reports include wideband CSI (for example, Wideband CQI) and narrowband CSI (for example, Subband CQI).
- the DCI format for uplink may be used for mode setting including the type of the periodic channel state information report or the irregular channel state information report and the channel state information report.
- a mode for reporting irregular channel state information and wideband CSI a mode for reporting irregular channel state information and narrowband CSI, an irregular channel state information report and wideband CSI and narrowband CSI Reporting mode, periodic channel state information reporting and wideband CSI reporting mode, periodic channel state information reporting and narrowband CSI reporting mode, periodic channel state information reporting and wideband CSI and narrowband CSI
- the terminal device 2 When the PDSCH resource is scheduled using downlink assignment, the terminal device 2 receives downlink data on the scheduled PDSCH. Also, when the PUSCH resource is scheduled using the uplink grant, the terminal device 2 transmits uplink data and / or uplink control information on the scheduled PUSCH.
- the PDSCH is used to transmit downlink data (downlink transport block, DL-SCH). Also, PDSCH is used to transmit a system information block type 1 message.
- the system information block type 1 message is cell-specific (cell-specific) information.
- PDSCH is used to transmit a system information message.
- the system information message includes a system information block X other than the system information block type 1.
- the system information message is cell specific (cell specific) information.
- PDSCH is used to transmit an RRC message.
- the RRC message transmitted from the base station device 1A may be common to a plurality of terminal devices 2 in the cell. Further, the RRC message transmitted from the base station device 1A may be a message dedicated to a certain terminal device 2 (also referred to as dedicated signaling). That is, user apparatus specific (user apparatus specific) information is transmitted to a certain terminal apparatus 2 using a dedicated message.
- PDSCH is used to transmit MAC CE.
- RRC messages and / or MAC CEs are also referred to as higher layer signaling.
- PDSCH can be used to request downlink channel state information.
- the PDSCH can also be used to transmit uplink resources that map channel state information reports (CSI feedback reports) that the terminal apparatus feeds back to the base station apparatus.
- channel state information reporting may be used for configuration to indicate uplink resources that periodically report channel state information (Periodic CSI).
- the channel state information report can be used for mode setting (CSI report mode) to report channel state information periodically.
- Types of downlink channel state information reports include wideband CSI (for example, Wideband CSI) and narrowband CSI (for example, Subband CSI).
- the wideband CSI calculates one channel state information for the system band of the cell.
- Narrowband CSI divides the system band into predetermined units, and calculates one channel state information for the division.
- a synchronization signal (SS) and a downlink reference signal (DL RS) are used as downlink physical signals.
- the downlink physical signal is not used to transmit information output from the upper layer, but is used by the physical layer.
- the synchronization signal is used by the terminal device 2 to synchronize the downlink frequency domain and time domain.
- the downlink reference signal is used by the terminal device 2 to perform channel correction of the downlink physical channel.
- the downlink reference signal is used by the terminal device 2 to calculate downlink channel state information.
- the downlink reference signal includes CRS (Cell-specific Reference Signal), PDRS related URS (UE-specific Reference Signal; terminal specific reference signal), and EPDCCH related DMRS (Demodulation Reference).
- CRS Cell-specific Reference Signal
- PDRS related URS UE-specific Reference Signal
- EPDCCH related DMRS Demodulation Reference
- Signal NZP CSI-RS (Non-Zero Power Chanel State Information-Reference Signal), ZP CSI-RS (Zero Power Chanel State Information-Reference Signal) are included.
- the CRS is transmitted in the entire band of subframes and is used to demodulate PBCH / PDCCH / PHICH / PCFICH / PDSCH.
- the URS associated with the PDSCH is transmitted in subframes and bands used for transmission of the PDSCH associated with the URS, and used to demodulate the PDSCH associated with the URS.
- the DMRSs associated with the EPDCCH are transmitted in subframes and bands in which the DMRS is used to transmit the associated EPDCCH.
- the DMRS is used to demodulate the EPDCCH to which the DMRS is associated.
- the resources of the NZP CSI-RS are set by the base station apparatus 1A.
- the terminal device 2 performs signal measurement (channel measurement) using the NZP CSI-RS.
- the resources of the ZP CSI-RS are set by the base station apparatus 1A.
- the base station apparatus 1A transmits ZP CSI-RS at zero output.
- the terminal device 2 measures interference in a resource corresponding to the NZP CSI-RS.
- the resource of ZP CSI-RS is set by the base station device 1A.
- the base station device 1B transmits ZP CSI-RS with zero output. That is, the base station apparatus 1A does not transmit the ZP CSI-RS.
- the base station device 1B does not transmit the PDSCH and the EPDCCH on the resources set by the ZP CSI-RS.
- the terminal device 2C can measure interference in a resource to which the NZP CSI-RS corresponds in a certain cell.
- MBSFN Multimedia Broadcast Multicast Service Single Frequency Network
- MBSFN RS is transmitted in the entire band of subframes used for PMCH transmission.
- MBSFN RS is used to demodulate PMCH.
- PMCH is transmitted on the antenna port used for transmission of MBSFN RS.
- downlink physical channel and the downlink physical signal are collectively referred to as a downlink signal.
- uplink physical channels and uplink physical signals are collectively referred to as uplink signals.
- downlink physical channels and uplink physical channels are collectively referred to as physical channels.
- downlink physical signals and uplink physical signals are collectively referred to as physical signals.
- BCH, UL-SCH and DL-SCH are transport channels.
- the channel used in the MAC layer is called a transport channel.
- the unit of transport channel used in the MAC layer is also referred to as transport block (TB) or MAC PDU (Protocol Data Unit).
- Transport blocks are units of data that the MAC layer delivers to the physical layer. In the physical layer, transport blocks are mapped to codewords, and encoding processing is performed for each codeword.
- the terminal device can have a function of removing or suppressing inter-user interference and inter-cell interference.
- a technology is under consideration as Network Assisted Interference Cancellation and Suppression (NAICS) in the 3rd Generation Partnership Project (3GPP).
- NAICS Network Assisted Interference Cancellation and Suppression
- a base station apparatus transmits NAICS assist information (also referred to as second support information) used by a terminal apparatus for handling, removing or suppressing an interference signal.
- the terminal device receives the NAICS assist information, detects a parameter for removing or suppressing the interference signal based on the NAICS assist information, and removes or suppresses the interference signal using the parameter.
- the NAICS assist information includes cell ID, CRS antenna port number, MBSFN subframe pattern, PB, virtual cell ID (virtual cell ID), scrambling identity (nSCID), PA, transmission mode, QCL information (quasi co-location information) ZPD / NZP CSI-RS configuration, PDSCH starting position (PDSCH starting position), TDD UL / DL configuration, precoding matrix indicator / rank indicator, modulation scheme, part or all of resource allocation information is included.
- PA is the power ratio of PDSCH to CRS in the OFDM symbol in which CRS is not allocated.
- PB represents the power ratio of PDSCH in an OFDM symbol in which CRS is allocated to PDSCH in an OFDM symbol in which CRS is not allocated.
- the QCL information is information on the QCL for a predetermined antenna port, a predetermined signal, or a predetermined channel. If the long-range characteristics of the channel on which the symbols on one antenna port are carried can be deduced from the channel on which the symbols on the other antenna port are carried in two antenna ports, then those antenna ports are QCL It is called. Long span characteristics include delay spread, Doppler spread, Doppler shift, average gain and / or average delay. That is, when the two antenna ports are QCLs, the terminal device can be considered to have the same long-term characteristics at those antenna ports.
- one value (candidate) may be set for each of the parameters included in the above-described NAICS assist information, or a plurality of values (candidates) may be set.
- the terminal device interprets that the parameter indicates a value that may be set by the base station apparatus causing interference, and sets the interference signal from the plurality of values.
- the NAICS assist information may indicate information of another base station apparatus or may indicate information of its own base station apparatus.
- the above-mentioned NAICS assist information is used by a terminal apparatus for handling, removing or suppressing the interference from the PDSCH to another terminal apparatus when demodulating the PDSCH for the terminal apparatus. Therefore, the NAICS assist information is also referred to as PDSCH interference assist information or PDSCH assist information.
- the NAICS assist information includes at least information on mapping of PDSCH resource elements to other terminal devices.
- the NAICS assist information may be used when making various measurements.
- the measurement includes Radio Resource Management (RRM) measurement, Radio Link Monitoring (RLM) measurement, and Channel State Information (CSI) measurement.
- RRM Radio Resource Management
- RLM Radio Link Monitoring
- CSI Channel State Information
- the terminal apparatus detects (specifies) PDSCH interference based on the set NAICS assist information, and reduces the detected PDSCH interference.
- the NAICS assist information may include quasi-static control information having a relatively long update frequency and may not include dynamic control information having a relatively short update frequency.
- Quasi-static control information includes cell ID, CRS antenna port number, MBSFN subframe pattern, PB, virtual cell ID (virtual cell ID), scrambling identity (nSCID), PA, transmission mode, QCL information (quasi co- location information), ZP / NZP CSI-RS configuration, PDSCH starting position (PDSCH starting position), TDD UL / DL configuration, etc.
- Dynamic control information includes precoding matrix index / rank index, modulation scheme, resource allocation information, and the like. Also, as described above, a plurality of values (candidates) may be set for each of the parameters included in the NAICS assist information. Therefore, the NAICS assist information can be regarded as information for indicating a plurality of PDSCH interference candidates.
- the terminal apparatus can perform blind detection in an attempt to detect PDSCH interference candidates that can be recognized based on the NAICS assist information.
- the terminal apparatus can reduce the interference due to PDSCH with respect to other terminal apparatuses based on the parameter detected from the NAICS assist information, it is possible to obtain the signal addressed to the own terminal apparatus with high accuracy.
- the NAICS assist information indicates a plurality of candidates, the influence on scheduling of the base station apparatus can be reduced.
- the terminal device may be referred to as blind detection of a parameter not received as the assist information.
- the removal or suppression of the interference signal can be performed by linear detection or non-linear detection.
- the linear detection can be detected in consideration of the channel of the desired signal addressed to the own terminal apparatus and the channel of the interference signal addressed to the other terminal apparatus.
- Such linear detection is also called ELMMSE-IRC (Enhanced Linear Minimum Mean Square Error-Interference Rejection Combining).
- an interference canceller or maximum likelihood detection can be performed as the non-linear detection.
- the base station apparatus can list and transmit NAICS assist information as a NAICS assist information list.
- the NAICS Assist Information List may include at least one NAICS Assist Information.
- the NAICS assist information list can be transmitted as adjacent cell NAICS information (also referred to as second interference information).
- the NAICS assist information list may be referred to as a PDSCH assist information list.
- the adjacent cell NAICS information may be referred to as adjacent cell PDSCH information.
- the terminal apparatus uses CRS assist information (also referred to as first support information) transmitted from the base station apparatus as a signal in the upper layer,
- the interference received from the CRS of the base station apparatus can be reduced.
- the CRS assist information is information of another base station apparatus, and includes a cell ID, the number of CRS antenna ports, and an MBSFN subframe setting list.
- the CRS assist information is listed and transmitted by the CRS assist information list.
- the CRS assist information list includes at least one CRS assist information. Further, the CRS assist information list is transmitted as adjacent cell CRS information (also referred to as first interference information).
- FIG. 2 is a schematic block diagram showing the configuration of the base station device 1A in the present embodiment.
- the base station apparatus 1A is configured to include an upper layer processing unit 101, a control unit 102, a transmission unit 103, a reception unit 104, and a transmission / reception antenna 105.
- the upper layer processing unit 101 is configured to include a radio resource control unit 1011 and a scheduling unit 1012.
- the transmitting unit 103 is configured to include an encoding unit 1031, a modulation unit 1032, a downlink reference signal generation unit 1033, a multiplexing unit 1034, and a radio transmission unit 1035.
- the receiving unit 104 includes a wireless receiving unit 1041, a demultiplexing unit 1042, a demodulating unit 1043, and a decoding unit 1044.
- the upper layer processing unit 101 includes a Medium Access Control (MAC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and a Radio Resource Control (Radio). Resource Control (RRC) layer processing is performed.
- the upper layer processing unit 101 also generates information necessary for controlling the transmission unit 103 and the reception unit 104, and outputs the information to the control unit 102.
- MAC Medium Access Control
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- Radio Radio Resource Control
- RRC Radio Resource Control
- the upper layer processing unit 101 determines whether to set NAICS assist information and whether to set CRS assist information.
- the radio resource control unit 1011 generates downlink data (transport block), system information, RRC message, MAC CE, etc., which are allocated to the downlink PDSCH, or acquires them from the upper node.
- the radio resource control unit 1011 outputs downlink data to the transmission unit 103, and outputs other information to the control unit 102.
- the radio resource control unit 1011 manages various setting information of the terminal device 2.
- This setting information can include setting information of a terminal device that causes interference. Alternatively, it is possible to obtain setting information of a terminal apparatus that causes interference from setting information of the own terminal apparatus. Moreover, the setting information of the base station apparatus which becomes interference can be included.
- the base station apparatus can transmit NAICS assist information and CRS assist information or NAICS assist information to a terminal apparatus capable of performing NAICS and / or CRS interference cancellation.
- the following transmission methods can be considered for NAICS assist information and CRS assist information.
- the base station apparatus transmits NAICS assist information without including information transmitted by CRS assist information in the NAICS assist information. Conceivable.
- an index of CRS assist information included in the CRS assist information list may be associated with an index of NAICS assist information included in the NAICS assist information list. For example, when the CRS assist information list includes CRS assist information 1 and CRS assist information 2 and the NAICS assist information list includes NAICS assist information 1 and NAICS assist information 2, NAICS assist information 1 and The CRS assist information 1, the NAICS assist information 2 and the CRS assist information 2 are associated with each other.
- the terminal device can handle the PDSCH interference based on the information included in the NAICS assist information 1 and the CRS assist information 1.
- the number of pieces of CRS assist information included in the CRS assist information list and the number of pieces of NAICS assist information included in the NAICS assist information list may be the same or different.
- the cell ID may be included in CRS and NAICS assist information in order to associate NAICS assist information with CRS assist information. That is, the terminal apparatus can detect the cell ID included in the NAICS assist information, and obtain CRS-related information, that is, the number of CRS antenna ports, MBSFN subframe configuration, from the CRS assist information associated with the cell ID. At this time, the terminal apparatus can remove CRS interference and handle PDSCH interference signals based on the NAICS assist information and the CRS assist information.
- the NAICS assist information can be transmitted only when the base station apparatus transmits the CRS assist information. That is, the base station apparatus can set the neighboring cell NAICS information only when the neighboring cell CRS information is set. Alternatively, when adjacent cell NAICS information is set, the base station apparatus must set adjacent cell CRS information (turn it on).
- the terminal apparatus can determine a subframe that handles PDSCH interference based on a subframe pattern or subframe set for CRS interference cancellation set in the upper layer.
- a method may be considered in which the base station apparatus transmits information on cell ID and CRS in NAICS assist information.
- the terminal device handles the interference related to PDSCH based on the NAICS assist information when the NAICS assist information is set and the CRS assist information is not set in the signal of the upper layer, and the information on the CRS included in the NAICS assist information CRS interference cancellation can be performed based on That is, in the case of the method of transmitting information including CRS in the NAICS assist information, the base station apparatus does not transmit the CRS assist information when transmitting the NAICS assist information, and transmits the CRS assist information. , NAICS assist information may not be transmitted. That is, the base station apparatus can set the neighboring cell NAICS information only when the neighboring cell CRS information is not set. Alternatively, when the neighboring cell NAICS information is set, the base station device does not set the neighboring cell CRS information (turn it off).
- the base station apparatus may include the same cell ID included in the CRS assist information and the cell ID included in the NAICS assist information, or may all be different.
- the terminal apparatus can perform CRS interference removal based on the CRS assist information.
- the base station apparatus can set the cell ID included in the NAICS assist information and the cell ID included in the CRS assist information to be different.
- the terminal device handles CRS interference and PDSCH interference based on information related to CRS set in NAICS assist information, and based on CRS assist information, in addition to CRS interference removed based on NAICS assist information. , CRS interference from another base station apparatus can be eliminated.
- the scheduling unit 1012 determines frequencies and subframes to which physical channels (PDSCHs and PUSCHs) are allocated, coding rates and modulation schemes (or MCSs) and transmission powers of the physical channels (PDSCHs and PUSCHs), and the like.
- the scheduling unit 1012 outputs the determined information to the control unit 102.
- the scheduling unit 1012 generates information used for scheduling physical channels (PDSCH and PUSCH) based on the scheduling result.
- the scheduling unit 1012 outputs the generated information to the control unit 102.
- the scheduling unit 1012 schedules the terminal device 2A and the terminal device 2B on the same resource.
- scheduling may be performed on different resources.
- it can also schedule in cooperation with the base station apparatus 1B.
- the control unit 102 generates a control signal for controlling the transmission unit 103 and the reception unit 104 based on the information input from the upper layer processing unit 101.
- the control unit 102 generates downlink control information based on the information input from the upper layer processing unit 101, and outputs the downlink control information to the transmission unit 103.
- Transmission section 103 generates a downlink reference signal in accordance with the control signal input from control section 102, and encodes the HARQ indicator, downlink control information and downlink data input from upper layer processing section 101. And modulates and multiplexes the PHICH, PDCCH, EPDCCH, PDSCH, and downlink reference signal, and transmits the signal to the terminal device 2 via the transmitting / receiving antenna 105.
- Coding section 1031 is a block coding, convolutional coding, turbo coding or other predetermined coding scheme for the HARQ indicator, downlink control information and downlink data input from upper layer processing section 101. Encoding is performed using the encoding method or encoding is performed using the encoding method determined by the radio resource control unit 1011.
- the modulation unit 1032 determines the coded bits input from the coding unit 1031 as BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), 16 QAM (Quadrature Amplitude Modulation), 64 QAM, 256 QAM, etc.
- the radio resource control unit 1011 performs modulation according to the determined modulation method.
- the downlink reference signal generation unit 1033 refers to the known sequence of the terminal apparatus 2 as a downlink, which is obtained according to a predetermined rule based on a physical cell identifier (PCI, cell ID) or the like for identifying the base station apparatus 1A. Generate as a signal.
- PCI physical cell identifier
- cell ID cell ID
- the multiplexing unit 1034 multiplexes the modulated modulation symbol of each channel, the generated downlink reference signal, and the downlink control information. That is, multiplexing section 1034 arranges the modulated modulation symbols of the respective channels, the generated downlink reference signal and the downlink control information in the resource element.
- the wireless transmission unit 1035 generates a OFDM symbol by performing inverse fast Fourier transform (IFFT) on the multiplexed modulation symbol and the like, and adds a cyclic prefix (CP) to the OFDM symbol to generate a base.
- IFFT inverse fast Fourier transform
- CP cyclic prefix
- the receiving unit 104 separates, demodulates and decodes a received signal received from the terminal device 2 via the transmitting and receiving antenna 105 in accordance with the control signal input from the control unit 102, and outputs the decoded information to the upper layer processing unit 101. .
- the wireless reception unit 1041 down-converts the uplink signal received via the transmission / reception antenna 105 into a baseband signal by down conversion, removes unnecessary frequency components, and amplifies the signal level so as to be appropriately maintained.
- the level is controlled, and quadrature demodulation is performed on the basis of the in-phase component and the quadrature component of the received signal to convert the quadrature-demodulated analog signal into a digital signal.
- the wireless reception unit 1041 removes the portion corresponding to the CP from the converted digital signal.
- the wireless reception unit 1041 performs fast Fourier transform (FFT) on the signal from which the CP has been removed, extracts a signal in the frequency domain, and outputs the signal to the demultiplexing unit 1042.
- FFT fast Fourier transform
- the demultiplexing unit 1042 separates the signal input from the wireless reception unit 1041 into signals such as PUCCH, PUSCH, and uplink reference signal. This separation is performed based on the allocation information of the radio resources included in the uplink grant which the base station apparatus 1A has determined in advance by the radio resource control unit 1011 and notified to each terminal apparatus 2.
- the demultiplexing unit 1042 compensates for the PUCCH and PUSCH propagation paths. Also, the demultiplexing unit 1042 demultiplexes the uplink reference signal.
- Demodulation section 1043 performs inverse discrete Fourier transform (Inverse Discrete Fourier Transform: IDFT) on PUSCH to obtain modulation symbols, and pre-generates modulation symbols such as BPSK, QPSK, 16 QAM, 64 QAM, 256 QAM, etc. for each of PUCCH and PUSCH modulation symbols.
- IDFT inverse discrete Fourier transform
- a predetermined or own apparatus demodulates the received signal using the modulation scheme previously notified to each terminal apparatus 2 by the uplink grant.
- Decoding section 1044 uses the coding rate of PUCCH and PUSCH, which has been demodulated, according to a predetermined coding scheme, or which the apparatus itself has notified terminal apparatus 2 in advance with an uplink grant. Decoding is performed, and the decoded uplink data and uplink control information are output to upper layer processing section 101. When the PUSCH is retransmission, the decoding unit 1044 performs decoding using the coded bits held in the HARQ buffer input from the upper layer processing unit 101 and the decoded coded bits.
- FIG. 3 is a schematic block diagram showing the configuration of the terminal device 2 in the present embodiment.
- the terminal device 2 includes an upper layer processing unit 201, a control unit 202, a transmission unit 203, a reception unit 204, a channel state information generation unit 205, and a transmission / reception antenna 206.
- the upper layer processing unit 201 is configured to include a radio resource control unit 2011 and a scheduling information interpretation unit 2012.
- the transmitting unit 203 is configured to include an encoding unit 2031, a modulation unit 2032, an uplink reference signal generation unit 2033, a multiplexing unit 2034, and a wireless transmission unit 2035.
- the receiving unit 204 includes a wireless receiving unit 2041, a demultiplexing unit 2042, and a signal detecting unit 2043.
- the upper layer processing unit 201 outputs uplink data (transport block) generated by a user operation or the like to the transmitting unit 203. Also, the upper layer processing unit 201 includes a Medium Access Control (MAC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and a radio resource control. (Radio Resource Control: RRC) layer processing is performed.
- MAC Medium Access Control
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- RRC Radio Resource Control
- the radio resource control unit 2011 manages various setting information of the own terminal apparatus. Also, the radio resource control unit 2011 generates information to be allocated to each uplink channel, and outputs the information to the transmission unit 203.
- the radio resource control unit 2011 acquires setting information on CSI feedback transmitted from the base station apparatus, and outputs the setting information to the control unit 202.
- the scheduling information interpretation unit 2012 interprets the downlink control information received via the reception unit 204, and determines scheduling information. Further, the scheduling information interpretation unit 2012 generates control information to control the reception unit 204 and the transmission unit 203 based on the scheduling information, and outputs the control information to the control unit 202.
- the control unit 202 generates a control signal that controls the reception unit 204, the channel state information generation unit 205, and the transmission unit 203 based on the information input from the upper layer processing unit 201.
- the control unit 202 outputs the generated control signal to the reception unit 204, the channel state information generation unit 205, and the transmission unit 203, and controls the reception unit 204 and the transmission unit 203.
- the control unit 202 controls the transmission unit 203 to transmit the CSI generated by the channel state information generation unit 205 to the base station apparatus.
- the receiving unit 204 separates, demodulates and decodes the received signal received from the base station apparatus 1 A via the transmitting and receiving antenna 206 according to the control signal input from the control unit 202, and transmits the decoded information to the upper layer processing unit 201. Output.
- the receiving unit 204 includes a reference signal (also referred to as a first reference signal) corresponding to the base station device 1A and a reference signal based on interference information set from the base station device 1A, which are included in the received signal (second reference (Also referred to as a signal) is output to the channel state information generation unit 205.
- the wireless reception unit 2041 down-converts the downlink signal received via the transmission / reception antenna 206 into a baseband signal by down conversion, removes unnecessary frequency components, and amplifies the level so that the signal level is maintained appropriately. And quadrature-demodulate the quadrature-demodulated analog signal into a digital signal based on the in-phase component and the quadrature-component of the received signal.
- the wireless reception unit 2041 removes the portion corresponding to the CP from the converted digital signal, performs fast Fourier transform on the signal from which the CP has been removed, and extracts the signal in the frequency domain.
- the demultiplexing unit 2042 demultiplexes the extracted signal into PHICH, PDCCH, EPDCCH, PDSCH, and downlink reference signal. In addition, the demultiplexing unit 2042 compensates for the PHICH, PDCCH, and EPDCCH channels based on the channel estimation value of the desired signal obtained from the channel measurement, detects downlink control information, and causes the control unit 202 to detect the downlink control information. Output. Further, the control unit 202 outputs the PDSCH and the channel estimation value of the desired signal to the signal detection unit 2043.
- the signal detection unit 2043 detects a signal using the PDSCH and the channel estimation value, and outputs the signal to the upper layer processing unit 201. If NAICS is set in the upper layer, interference signals are removed or suppressed to perform signal detection. As the removal or suppression of the interference signal, for example, linear detection in which the channel estimation value of the interference signal is considered, or interference cancellation or maximum likelihood detection in which the channel estimation value or modulation scheme of the interference signal is considered.
- the signal detection unit 2043 estimates an interference channel based on the NAICS assist information and CRS assist information associated with the cell ID included in the NAICS assist information. And / or detect parameters necessary for demodulation of the interference signal. For parameters for which multiple values are set in the NAICS assist information, multiple values are set as candidates, and the values set in the interference signal are blindly detected. Moreover, the parameter which is not set by NAICS assistance information and CRS assistance information makes the value which may be set by the system a candidate, and performs blind detection of the value set to the interference signal. The signal detection unit 2043 can perform interference cancellation or suppression of the PDSCH using the detected parameter. Moreover, the interference removal of CRS can be performed based on CRS assist information.
- the signal detection unit 2043 determines parameters necessary for channel estimation of the interference signal and / or demodulation of the interference signal based on the NAICS assist information. To detect. For parameters for which multiple values are set in the NAICS assist information, multiple values are set as candidates, and the values set in the interference signal are blindly detected. Parameters not set in the NAICS assist information are blindly detected. Further, even if CRS assist information is not set, CRS interference is removed based on the information on CRS included in the NAICS assist information.
- the signal detection unit 2043 When CRS assist information is set in the upper layer and NAICS assist information is not set in the upper layer, the signal detection unit 2043 does not perform interference removal or suppression of the PDSCH, and removes CRS interference based on the CRS assist information.
- the transmitting unit 203 generates an uplink reference signal in accordance with the control signal input from the control unit 202, and encodes and modulates uplink data (transport block) input from the upper layer processing unit 201, thereby generating PUCCH,
- the PUSCH and the generated uplink reference signal are multiplexed and transmitted to the base station apparatus 1A via the transmission / reception antenna 206.
- the encoding unit 2031 performs encoding such as convolutional encoding and block encoding on the uplink control information input from the upper layer processing unit 201. Also, the coding unit 2031 performs turbo coding based on information used for PUSCH scheduling.
- the modulation unit 2032 modulates the coded bits input from the coding unit 2031 according to the modulation scheme notified by downlink control information such as BPSK, QPSK, 16 QAM, 64 QAM, or the like, or the modulation scheme predetermined for each channel. .
- the uplink reference signal generation unit 2033 is a physical cell identifier (physical cell identity: referred to as PCI, Cell ID etc.) for identifying the base station apparatus 1A, a bandwidth for arranging the uplink reference signal, an uplink grant Based on the notified cyclic shift, the parameter value for the generation of the DMRS sequence, and the like, a sequence determined by a predetermined rule (expression) is generated.
- PCI physical cell identity
- Cell ID Physical cell identity
- the multiplexing unit 2034 rearranges the modulation symbols of the PUSCH in parallel according to the control signal input from the control unit 202 and then performs discrete Fourier transform (DFT). Also, the multiplexing unit 2034 multiplexes the PUCCH and PUSCH signals and the generated uplink reference signal for each transmission antenna port. That is, multiplexing section 2034 arranges the PUCCH and PUSCH signals and the generated uplink reference signal in the resource element for each transmission antenna port.
- DFT discrete Fourier transform
- the wireless transmission unit 2035 performs inverse fast Fourier transform (IFFT) on the multiplexed signal to perform SC-FDMA modulation, generates SC-FDMA symbols, and generates SC-FDMA symbols.
- IFFT inverse fast Fourier transform
- CP to generate a baseband digital signal, convert the baseband digital signal to an analog signal, remove extra frequency components, convert it to a carrier frequency by up conversion, amplify the power, and transmit / receive antenna Output to 206 and send.
- a program that operates in the base station apparatus and the terminal apparatus according to the present invention is a program (a program that causes a computer to function) to control a CPU or the like so as to realize the functions of the above-described embodiments according to the present invention. Then, the information handled by these devices is temporarily stored in the RAM at the time of the processing, then stored in various ROMs and HDDs, read out by the CPU as needed, and correction / writing is performed.
- a recording medium for storing the program a semiconductor medium (for example, ROM, nonvolatile memory card etc.), an optical recording medium (for example DVD, MO, MD, CD, BD etc.), a magnetic recording medium (for example magnetic tape, It may be any of flexible disks and the like. Further, by executing the loaded program, not only the functions of the above-described embodiment are realized, but also processing in cooperation with an operating system or another application program, etc., based on the instructions of the program. The features of the invention may be realized.
- the program When the program is distributed to the market, the program can be stored and distributed in a portable recording medium, or can be transferred to a server computer connected via a network such as the Internet.
- the storage device of the server computer is also included in the present invention.
- part or all of the terminal device and the base station device in the above-described embodiment may be realized as an LSI, which is typically an integrated circuit.
- Each functional block of the receiving apparatus may be chiped individually, or some or all of the functional blocks may be integrated and chipped. When each functional block is integrated, an integrated circuit control unit is added to control them.
- the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible.
- an integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology, it is also possible to use an integrated circuit according to such technology.
- the present invention is not limited to the above embodiment.
- the terminal device of the present invention is not limited to the application to a mobile station device, and may be a stationary or non-mobile electronic device installed indoors and outdoors, for example, an AV device, a kitchen device, a cleaning / washing device Needless to say, it can be applied to air conditioners, office equipment, vending machines, and other household appliances.
- the present invention is suitable for use in a base station apparatus, a terminal apparatus and a communication method.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
・PUCCH(Physical Uplink Control Channel)
・PUSCH(Physical Uplink Shared Channel)
・PRACH(Physical Random Access Channel)
・PBCH(Physical Broadcast Channel;報知チャネル)
・PCFICH(Physical Control Format Indicator Channel;制御フォーマット指示チャネル)
・PHICH(Physical Hybrid automatic repeat request Indicator Channel;HARQ指示チャネル)
・PDCCH(Physical Downlink Control Channel;下りリンク制御チャネル)
・EPDCCH(Enhanced Physical Downlink Control Channel;拡張下りリンク制御チャネル)
・PDSCH(Physical Downlink Shared Channel;下りリンク共有チャネル)
2A、2B、2C 端末装置
101 上位層処理部
102 制御部
103 送信部
104 受信部
105 送受信アンテナ
1011 無線リソース制御部
1012 スケジューリング部
1031 符号化部
1032 変調部
1033 下りリンク参照信号生成部
1034 多重部
1035 無線送信部
1041 無線受信部
1042 多重分離部
1043 復調部
1044 復号部
201 上位層処理部
202 制御部
203 送信部
204 受信部
205 チャネル状態情報生成部
206 送受信アンテナ
2011 無線リソース制御部
2012 スケジューリング情報解釈部
2031 符号化部
2032 変調部
2033 上りリンク参照信号生成部
2034 多重部
2035 無線送信部
2041 無線受信部
2042 多重分離部
2043 信号検出部
Claims (8)
- 端末装置と通信する基地局装置であって、
セル固有参照信号からの干渉を低減するために前記端末装置に用いられるCRSアシスト情報を前記端末装置に設定する上位層処理部を備え、
DL/ULサブフレーム構成に関する情報とMBSFNサブフレームに関する情報を含む所定のパラメータが設定される場合、前記上位層処理部は前記CRSアシスト情報を前記端末装置に設定しない基地局装置。 - 前記CRSアシスト情報は、物理セルID、アンテナポート数、MBSFNサブフレーム設定を含む請求項1に記載の基地局装置。
- 前記所定のパラメータが設定されない場合のみ、前記上位層処理部は前記CRSアシスト情報を前記端末装置に設定する請求項1に記載の基地局装置。
- 基地局装置と通信する端末装置であって、
前記基地局装置から、セル固有参照信号からの干渉を低減するために用いられるCRSアシスト情報を設定される上位層処理部を備え、
DL/ULサブフレーム構成に関する情報とMBSFNサブフレームに関する情報を含む所定のパラメータが設定される場合、前記CRSアシスト情報は設定されない端末装置。 - 前記CRSアシスト情報は、物理セルID、アンテナポート数、MBSFNサブフレーム設定を含む請求項4に記載の端末装置。
- 前記所定のパラメータが設定されない場合のみ、前記CRSアシスト情報は設定される請求項4に記載の端末装置。
- 端末装置と通信する基地局装置の通信方法であって、
セル固有参照信号からの干渉を低減するために前記端末装置に用いられるCRSアシスト情報を前記端末装置に設定する手段を備え、
DL/ULサブフレーム構成に関する情報とMBSFNサブフレームに関する情報を含む所定のパラメータが設定される場合、前記CRSアシスト情報を前記端末装置に設定しない通信方法。 - 基地局装置と通信する端末装置の通信方法であって、
前記基地局装置から、セル固有参照信号からの干渉を低減するために用いられるCRSアシスト情報を設定される手段を備え、
DL/ULサブフレーム構成に関する情報とMBSFNサブフレームに関する情報を含む所定のパラメータが設定される場合、前記CRSアシスト情報は設定されない通信方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/316,948 US10110358B2 (en) | 2014-06-10 | 2015-05-29 | Base-station device, terminal device, and communication method using CRS assistance information |
EP15805734.9A EP3157306B1 (en) | 2014-06-10 | 2015-05-29 | Base-station device, terminal device, and communication method |
CN201580024159.XA CN106465475B (zh) | 2014-06-10 | 2015-05-29 | 基站装置、终端装置以及通信方法 |
JP2016527739A JP6540968B2 (ja) | 2014-06-10 | 2015-05-29 | 基地局装置、端末装置および通信方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-119166 | 2014-06-10 | ||
JP2014119166 | 2014-06-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015190312A1 true WO2015190312A1 (ja) | 2015-12-17 |
Family
ID=54833413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/065506 WO2015190312A1 (ja) | 2014-06-10 | 2015-05-29 | 基地局装置、端末装置および通信方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10110358B2 (ja) |
EP (1) | EP3157306B1 (ja) |
JP (1) | JP6540968B2 (ja) |
CN (1) | CN106465475B (ja) |
WO (1) | WO2015190312A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014157786A1 (ko) | 2013-03-27 | 2014-10-02 | 엘지전자 주식회사 | 무선 통신 시스템에서 간섭 제거를 위한 방법 및 이를 위한 장치 |
US20150208428A1 (en) * | 2014-01-17 | 2015-07-23 | Lg Electronics Inc. | Method and apparatus for interference cancellation |
US20150365178A1 (en) * | 2014-06-12 | 2015-12-17 | Broadcom Corporation | System, method, and apparatus for signaling intefering cell information |
EP3179648B1 (en) | 2014-08-07 | 2019-10-30 | Sharp Kabushiki Kaisha | Base station apparatus, terminal apparatus and integrated circuit |
WO2016020513A1 (en) * | 2014-08-07 | 2016-02-11 | Telefonaktiebolaget L M Ericsson (Publ) | System and method for characterizing dynamic interferers in advanced receivers |
KR102330319B1 (ko) | 2015-08-07 | 2021-11-24 | 삼성전자주식회사 | 무선 통신 시스템에서 라디오 링크 모니터링 방법 및 장치 |
US10568055B2 (en) * | 2017-03-03 | 2020-02-18 | Motorola Mobility Llc | Method and apparatus for communicating synchronization signals |
WO2018227558A1 (en) * | 2017-06-16 | 2018-12-20 | Qualcomm Incorporated | Signaling design for multiple aperiodic csi feedback |
US10986665B2 (en) * | 2017-09-15 | 2021-04-20 | Qualcomm Incorporated | Quasi-colocation for LBT |
CN110621034B (zh) * | 2018-06-19 | 2021-06-29 | 维沃移动通信有限公司 | 一种传输控制方法、装置及系统 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013107319A1 (zh) * | 2012-01-19 | 2013-07-25 | 中兴通讯股份有限公司 | 下行数据处理、指示方法及装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9642021B2 (en) * | 2010-10-04 | 2017-05-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Acquisition of cell information for enhancing network operation in heterogeneous environment |
CN103843423B (zh) * | 2011-09-30 | 2018-08-24 | 夏普株式会社 | 终端装置以及用于终端装置的方法 |
CN104604283B (zh) * | 2012-08-30 | 2019-04-26 | Lg 电子株式会社 | 在无线通信系统中估计信道的方法和设备 |
EP3972161B1 (en) * | 2013-09-27 | 2024-01-31 | Samsung Electronics Co., Ltd. | Methods and apparatuses for discovery signals for lte advanced |
-
2015
- 2015-05-29 CN CN201580024159.XA patent/CN106465475B/zh active Active
- 2015-05-29 US US15/316,948 patent/US10110358B2/en active Active
- 2015-05-29 WO PCT/JP2015/065506 patent/WO2015190312A1/ja active Application Filing
- 2015-05-29 JP JP2016527739A patent/JP6540968B2/ja active Active
- 2015-05-29 EP EP15805734.9A patent/EP3157306B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013107319A1 (zh) * | 2012-01-19 | 2013-07-25 | 中兴通讯股份有限公司 | 下行数据处理、指示方法及装置 |
Non-Patent Citations (5)
Title |
---|
ERICSSON: "NAICS parameters", 3GPP TSG-RAN WG2 #87 TDOC R2-143509, XP050794510, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_87/Docs/R2-143509.zip> [retrieved on 20150729] * |
INTEL CORPORATION: "Discussion on NAICS interference semi-static parameters blind detection and signalling", 3GPP TSG-RAN WG4 MEETING #71 R4-143034, 12 May 2014 (2014-05-12), XP050797803, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG4_Radio/TSGR4_71/docs/R4-143034.zip> [retrieved on 20150729] * |
MEDIATEK: "Meeting minutes for NAICS ad hoc", 3GPP TSG RAN WG4 MEETING #71 R4-143848, 21 May 2014 (2014-05-21), XP050798459, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG4_Radio/TSGR4_71/docs/R4-143848.zip> [retrieved on 20150729] * |
NVIDIA: "Remaining aspects of higher-layer signaling for NAICS", 3GPP TSG-RAN WG1 #77 R1- 142588, 20 May 2014 (2014-05-20), XP050788172, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_77/Docs/Rl-142588.zip> [retrieved on 20150729] * |
See also references of EP3157306A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN106465475A (zh) | 2017-02-22 |
EP3157306A4 (en) | 2017-07-12 |
JPWO2015190312A1 (ja) | 2017-04-20 |
JP6540968B2 (ja) | 2019-07-10 |
EP3157306A1 (en) | 2017-04-19 |
US20170126383A1 (en) | 2017-05-04 |
CN106465475B (zh) | 2019-12-06 |
EP3157306B1 (en) | 2021-05-19 |
US10110358B2 (en) | 2018-10-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6529087B2 (ja) | 基地局装置、端末装置および集積回路 | |
JP6540968B2 (ja) | 基地局装置、端末装置および通信方法 | |
EP3386243B1 (en) | Base station device, terminal device, and communication method | |
JP6646582B2 (ja) | 基地局装置、端末装置および方法 | |
JP6899326B2 (ja) | 基地局装置、端末装置および通信方法 | |
WO2015166865A1 (ja) | 端末装置および集積回路 | |
JP6588018B2 (ja) | 基地局装置、端末装置および方法 | |
JP6811714B2 (ja) | 基地局装置、端末装置および通信方法 | |
JP6540969B2 (ja) | 端末装置および集積回路 | |
WO2016027646A1 (ja) | 端末装置、基地局装置および通信方法 | |
WO2015166861A1 (ja) | 端末装置および集積回路 | |
WO2016129425A1 (ja) | 基地局装置、端末装置および通信方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15805734 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016527739 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15316948 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REEP | Request for entry into the european phase |
Ref document number: 2015805734 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2015805734 Country of ref document: EP |