WO2020066852A1

WO2020066852A1 - Base station device, terminal device, communication method and integrated circuit

Info

Publication number: WO2020066852A1
Application number: PCT/JP2019/036833
Authority: WO
Inventors: 星野　正幸; 山田　昇平; 秀和坪井; 高橋　宏樹; 麗清劉
Original assignee: シャープ株式会社
Priority date: 2018-09-27
Filing date: 2019-09-19
Publication date: 2020-04-02
Also published as: JP2020053879A

Abstract

In this invention, channel state information is efficiently transmitted. The purpose of the present invention is to provide a terminal device, a base station device, a communication method and an integrated circuit which allow efficient communication between the base station device and the terminal device in a wireless communication system. A receiving unit is provided which receives a reference signal for calculating channel state information. On the basis of whether or not NZP-CSI-RS time-frequency resources are limited to part or all of ZP-CSI-RS time-frequency resources, a spatial domain transmission filter that uses the previous sounding reference signal is applied, and the sounding reference signal is transmitted.

Description

Base station device, terminal device, communication method, and integrated circuit

<< The present invention relates to a base station device, a terminal device, a communication method, and an integrated circuit. This application claims priority based on Japanese Patent Application No. 2018-182382 for which it applied to Japan on September 27, 2018, and uses the content here.

Currently, as the wireless access method and wireless network technology for the fifth generation cellular system, in the 3rd generation partnership project (3GPP: The Third Generation Partnership Project), LTE (Long Term Evolution) -Advanced Pro and NR (New Radio) technology) and standard formulation (Non-Patent Document 1).

5th generation cellular systems include enhanced mobile broadband (eMBB) for high-speed and large-capacity transmission, ultra-reliable and low-latency communication (URLLC) for low-latency and high-reliability communication, and Internet of Things (IoT). There are three demands for the service scenario: mmMTC (massive Machine Type Communication) to which many machine-type devices connect.

One object of one embodiment of the present invention is to provide a terminal device, a base station device, a communication method, and an integrated circuit that enable efficient communication in the above wireless communication system.

(1) In order to achieve the above object, the present invention has taken the following measures. That is, in the terminal device according to the first aspect of the present invention, the first time-frequency resource of one or a plurality of zero power channel state information reference signals is set by the upper layer, and is arranged in the second time-frequency resource. A receiving unit that receives downlink control information including information specifying a first non-zero power channel state information calculation reference signal, wherein the second time-frequency resource is a part of the first time-frequency resource or The spatial domain transmission filter used for the previous sounding reference signal is applied based on whether the sounding reference signal is limited to the whole, and the sounding reference signal is transmitted.

(2) Further, the base station apparatus according to one aspect of the present invention sets the first time-frequency resource of one or a plurality of zero power channel state information reference signals by an upper layer, and arranges the first time-frequency resource in the second time-frequency resource. A transmission unit that transmits downlink control information including information specifying a first non-zero power channel state information calculation reference signal to be transmitted, wherein the second time-frequency resource is a part of the first time-frequency resource. Alternatively, the sounding reference signal transmitted by applying the spatial domain transmission filter used for the previous sounding reference signal is received based on whether the sounding reference signal is limited to the whole.

(3) The communication method according to an aspect of the present invention is a communication method for a terminal device, wherein a first time-frequency resource of one or a plurality of zero power channel state information reference signals is set by an upper layer, Receiving downlink control information including information designating a first non-zero power channel state information calculation reference signal arranged in a second time-frequency resource, wherein the second time-frequency resource is in the first time-frequency resource; The spatial domain transmission filter used for the previous sounding reference signal is applied, and the sounding reference signal is transmitted, based on whether the sounding reference signal is limited to part or all of the frequency resources.

(4) The communication method according to an aspect of the present invention is a communication method for a base station apparatus, wherein the first time-frequency resource of one or more zero power channel state information reference signals is set by an upper layer. Transmitting downlink control information including information specifying a first non-zero power channel state information calculation reference signal to be allocated to a second time-frequency resource, wherein the second time-frequency resource is the first time-frequency resource. Apply the spatial domain transmission filter used for the previous sounding reference signal transmitted based on whether it is limited to part or all of the time-frequency resource, and receive the sounding reference signal.

(5) Further, the integrated circuit according to one aspect of the present invention is an integrated circuit mounted on a terminal device, wherein the first time-frequency resource of one or a plurality of zero power channel state information reference signals is transmitted by an upper layer. Receiving means for receiving downlink control information that includes information specifying a first non-zero power channel state information calculation reference signal that is set and arranged in a second time-frequency resource; The spatial domain transmission filter used for the previous sounding reference signal is applied based on whether the time frequency resource is limited to a part or the entirety of the first time frequency resource, and the sounding reference signal is transmitted.

(6) Further, the integrated circuit according to one aspect of the present invention is an integrated circuit mounted on the base station apparatus, wherein the first time-frequency resource of one or a plurality of zero power channel state information reference signals is assigned to an upper layer. Transmitting means for transmitting downlink control information including information specifying a first non-zero power channel state information calculation reference signal arranged in a second time-frequency resource. Receiving the sounding reference signal transmitted by applying the spatial domain transmission filter used for the previous sounding reference signal based on whether the time-frequency resource is limited to part or all of the first time-frequency resource I do.

According to one aspect of the present invention, a base station device and a terminal device can communicate efficiently.

It is a figure showing the concept of the wireless communication system in this embodiment. FIG. 2 is a diagram illustrating an example of a schematic configuration of an uplink and a downlink slot in the present embodiment. FIG. 3 is a diagram showing a relationship in a time domain between subframes, slots, and minislots. FIG. 3 is a diagram illustrating an example of a slot or a subframe. FIG. 3 is a diagram illustrating an example of beam forming. FIG. 3 is a diagram illustrating an example of CSI resource settings and ZP-CSI-RS resource settings. FIG. 2 is a schematic block diagram illustrating a configuration of a terminal device according to the present embodiment. FIG. 2 is a schematic block diagram illustrating a configuration of a base station device according to the present embodiment.

Hereinafter, embodiments of the present invention will be described.

FIG. 1 is a conceptual diagram of the wireless communication system according to the present embodiment. In FIG. 1, the wireless communication system includes a terminal device 1A, a terminal device 1B, and a base station device 3. Hereinafter, the

terminal devices

1A and 1B are also referred to as terminal devices 1.

The terminal device 1 is also called a user terminal, a mobile station device, a communication terminal, a mobile device, a terminal, a UE (User Equipment), and an MS (Mobile Station). The base station device 3 includes a wireless base station device, a base station, a wireless base station, a fixed station, an NB (Node B), an eNB (evolved Node B), a BTS (Base Transceiver Station), a BS (Base Station), and an NR NB ( Also called NR (Node B), NNB, TRP (Transmission and Reception Point), and gNB. The base station device 3 may include a core network device. In addition, the base station device 3 may include one or more transmission / reception points 4 (transmission @ reception @ point). At least a part of the functions / processes of the base station device 3 described below may be the functions / processes at each transmission / reception point 4 of the base station device 3. The base station device 3 may serve the terminal device 1 with one or more cells in a communicable range (communication area) controlled by the base station device 3. Further, the base station device 3 may serve the terminal device 1 with one or a plurality of cells in a communicable range (communication area) controlled by one or a plurality of transmission / reception points 4. Further, one cell may be divided into a plurality of partial areas (Beamed @ area), and the terminal device 1 may be served in each of the partial areas. Here, the partial area may be identified based on an index of a beam used in beamforming or an index of precoding.

無線 A wireless communication link from the base station device 3 to the terminal device 1 is referred to as a downlink. The wireless communication link from the terminal device 1 to the base station device 3 is called an uplink.

In FIG. 1, in wireless communication between the terminal device 1 and the base station device 3, orthogonal frequency division multiplexing (OFDM) including a cyclic prefix (CP: Cyclic Prefix), single carrier frequency multiplexing (SC- （). FDM: Single-Carrier Frequency Division Multiplexing, Discrete Fourier Transform Spread OFDM (DFT-S-OFDM: Discrete Fourier Transform Spread OFDM), Multi-Carrier Code Division Multiplexing (MC-CDM) Is also good.

In FIG. 1, in wireless communication between the terminal device 1 and the base station device 3, a universal filter multicarrier (UFMC), a filter OFDM (F-OFDM), and a window function are used. Multiplied OFDM (Windowed OFDM) and filter bank multicarrier (FBMC: Filter-Bank Multi-Carrier) may be used.

In the present embodiment, OFDM symbols will be described using OFDM as a transmission scheme, but a case using the above-described other transmission schemes is also included in one embodiment of the present invention.

In FIG. 1, in the wireless communication between the terminal device 1 and the base station device 3, the above-described transmission method using no padding or zero padding instead of the CP may be used. Also, the CP and zero padding may be added to both the front and the rear.

In FIG. 1, the following physical channels are used in wireless communication between the terminal device 1 and the base station device 3.

・ PBCH (Physical Broadcast CHannel)
・ PDCCH (Physical Downlink Control CHannel)
・ PDSCH (Physical Downlink Shared CHannel)
・ PUCCH (Physical Uplink Control CHannel)
・ PUSCH (Physical Uplink Shared CHannel)
・ PRACH (Physical Random Access CHannel)

The PBCH is used to broadcast important information blocks (MIB: Master Information Block, EIB: Essential Information Block, BCH: Broadcast Channel) containing important system information required by the terminal device 1.

The PBCH may be used to broadcast a time index within a cycle of a synchronization signal block (also referred to as an SS / PBCH block). Here, the time index is information indicating an index of a synchronization signal and a PBCH in a cell. For example, when transmitting an SS / PBCH block using the assumption of three transmission beams (transmission filter setting, quasi-co-location (QCL: Quasi Co-Location) related to reception spatial parameters), the SS / PBCH block is set within a predetermined period or set. Chronological order within the specified cycle. Further, the terminal device may recognize the difference in the time index as the difference in the transmission beam.

The PDCCH is used to transmit (or carry) downlink control information (Downlink Control Information: DCI) in downlink wireless communication (wireless communication from the base station device 3 to the terminal device 1). Here, one or a plurality of DCIs (which may be referred to as DCI formats) are defined for transmission of downlink control information. That is, a field for downlink control information is defined as DCI and is mapped to information bits.

For example, the following DCI format may be defined.
-DCI format 0_0
-DCI format 0_1
-DCI format 1_0
-DCI format 1_1
-DCI format 2_0
-DCI format 2_1
-DCI format 2_2
-DCI format 2_3

DCI format 0_0 may include information indicating PUSCH scheduling information (frequency domain resource allocation and time domain resource allocation).

The DCI format 0_1 is information indicating PUSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating a band portion (BWP: BandWidth @ Part), channel state information (CSI: Channel @ State @ Information) request, sounding reference. A signal (SRS: Sounding Reference Signal) request and information on an antenna port may be included. Here, the channel state information request is also referred to as a CSI request. The sounding reference signal request is also called an SRS request.

The DCI format 1_0 may include information indicating PDSCH scheduling information (frequency domain resource allocation and time domain resource allocation).

The DCI format 1_1 includes information indicating PDSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating a band portion (BWP), a transmission configuration instruction (TCI: Transmission Configuration Indication), and information regarding an antenna port. Is fine.

$ DCI format 2_0 is used to notify the slot format of one or more slots. The slot format is defined such that each OFDM symbol in a slot is classified into one of downlink, flexible, and uplink. For example, when the slot format is 28, DDDDDDDDDDDFU is applied to 14 OFDM symbols in the slot for which the slot format 28 is indicated. Here, D is a downlink symbol, F is a flexible symbol, and U is an uplink symbol. The slot will be described later.

The DCI format 2_1 is used to notify the terminal device 1 of a physical resource block and an OFDM symbol that may be assumed to have no transmission. This information may be referred to as a preemption instruction (intermittent transmission instruction).

The DCI format 2_2 is used for transmitting a PUSCH and a transmission power control (TPC: Transmit Power Control) command for the PUSCH.

The DCI format 2_3 is used to transmit a group of TPC commands for transmitting a sounding reference signal (SRS) by one or a plurality of terminal devices 1. Further, an SRS request may be transmitted together with the TPC command. Further, in DCI format 2_3, an SRS request and a TPC command may be defined for an uplink without a PUSCH and a PUCCH, or for an uplink in which SRS transmission power control is not associated with PUSCH transmission power control.

ＤＣThe DCI for the downlink is also called a downlink grant (downlink @ grant) or a downlink assignment (downlink @ assignment). Here, DCI for the uplink is also referred to as an uplink grant (uplink @ grant) or an uplink assignment (Uplink @ assignment).

The PUCCH is used for transmitting uplink control information (Uplink Control Information: UCI) in uplink wireless communication (wireless communication from the terminal device 1 to the base station device 3). Here, the uplink control information may include channel state information (CSI: {Channel} State} Information) used to indicate the state of the downlink channel. Further, the uplink control information may include a scheduling request (SR: Scheduling Request) used to request the UL-SCH resource. In addition, the uplink control information may include HARQ-ACK (Hybrid \ Automatic \ Repeat \ request \ ACKnowledgement). HARQ-ACK may indicate HARQ-ACK for downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink-Shared Channel: DL-SCH).

The PDSCH is used for transmitting downlink data (DL-SCH: Downlink Shared CHannel) from the medium access (MAC: Medium Access Control) layer. In the case of downlink, it is also used for transmitting system information (SI: \ System \ Information) and a random access response (RAR: \ Random \ Access \ Response).

The PUSCH may be used to transmit HARQ-ACK and / or CSI together with uplink data (UL-SCH: Uplink Shared CHannel) or uplink data from the MAC layer. Also, it may be used to transmit only CSI or only HARQ-ACK and CSI. That is, it may be used to transmit only UCI.

Here, the base station device 3 and the terminal device 1 exchange (transmit and receive) signals in an upper layer (higher layer). For example, the base station device 3 and the terminal device 1 transmit and receive RRC signaling (RRC message: Radio Resource Control message, RRC information: also referred to as Radio Resource Control information) in a radio resource control (RRC: Radio Resource Control) layer. May be. Further, the base station device 3 and the terminal device 1 may transmit and receive a MAC control element in a MAC (Medium Access Control) layer. Here, the RRC signaling and / or the MAC control element are also referred to as a higher-layer signal. The upper layer here means the upper layer as viewed from the physical layer, and may include one or more of a MAC layer, an RRC layer, an RLC layer, a PDCP layer, a NAS (Non Access Stratum) layer, and the like. For example, in the processing of the MAC layer, the upper layer may include one or more of an RRC layer, an RLC layer, a PDCP layer, a NAS layer, and the like.

$ PDSCH or PUSCH may be used for transmitting RRC signaling and MAC control elements. Here, in the PDSCH, RRC signaling transmitted from the base station device 3 may be common signaling to a plurality of terminal devices 1 in a cell. Further, the RRC signaling transmitted from the base station apparatus 3 may be signaling dedicated to a certain terminal apparatus 1 (also referred to as dedicated signaling). That is, terminal device-specific (UE-specific) information may be transmitted to a certain terminal device 1 using dedicated signaling. Also, the PUSCH may be used for transmission of UE capability (UE Capability) in the uplink.

In FIG. 1, the following downlink physical signals are used in downlink wireless communication. Here, the downlink physical signal is not used for transmitting information output from the upper layer, but is used by the physical layer.
・ Synchronization signal (SS)
・ Reference Signal (RS)

The synchronization signal may include a primary synchronization signal (PSS: Primary Synchronization Signal) and a secondary synchronization signal (SSS). The cell ID may be detected using the PSS and the SSS.

The synchronization signal is used by the terminal device 1 to synchronize the downlink frequency domain and the time domain. Here, the synchronization signal may be used by the terminal device 1 for precoding or beam selection in precoding or beamforming by the base station device 3. Note that the beam may be called a transmission or reception filter setting, or a spatial domain transmission filter or a spatial domain reception filter.

The reference signal is used by the terminal device 1 to perform channel compensation of the physical channel. Here, the reference signal may also be used by the terminal device 1 to calculate downlink CSI. In addition, the reference signal may be used for fine synchronization (Fine synchronization) to enable numerology such as wireless parameters and subcarrier intervals, FFT window synchronization, and the like.

In the present embodiment, one or more of the following downlink reference signals are used.
・ DMRS (Demodulation Reference Signal)
・ CSI-RS (Channel State Information Reference Signal)
・ PTRS (Phase Tracking Reference Signal)
・ TRS (Tracking Reference Signal)

DMRS is used to demodulate a modulated signal. In the DMRS, two types of reference signals for demodulating the PBCH and a reference signal for demodulating the PDSCH may be defined, or both may be referred to as DMRS. CSI-RS is used for channel state information (CSI) measurement and beam management, and a periodic, semi-persistent, or aperiodic CSI reference signal transmission method is applied. PTRS is used to track the phase in the time axis in order to guarantee a frequency offset due to phase noise. TRS is used to guarantee Doppler shift during high-speed movement. Note that TRS may be used as one setting of CSI-RS. For example, a radio resource may be set as one port CSI-RS as TRS.

In this embodiment, one or more of the following uplink reference signals are used.
・ DMRS (Demodulation Reference Signal)
・ PTRS (Phase Tracking Reference Signal)
・ SRS (Sounding Reference Signal)

DMRS is used to demodulate a modulated signal. In the DMRS, two types of reference signals for demodulating the PUCCH and reference signals for demodulating the PUSCH may be defined, or both may be referred to as DMRS. The SRS is used for uplink channel state information (CSI) measurement, channel sounding, and beam management. PTRS is used to track the phase in the time axis in order to guarantee a frequency offset due to phase noise.

A downlink physical channel and / or a downlink physical signal are collectively referred to as a downlink signal. An uplink physical channel and / or an uplink physical signal are collectively referred to as an uplink signal. The downlink physical channel and / or the uplink physical channel are collectively referred to as a physical channel. The downlink physical signal and / or 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) layer is called a transport channel. A transport channel unit used in the MAC layer is also referred to as a transport block (TB) and / or a MAC PDU (Protocol Data Unit). In the MAC layer, HARQ (Hybrid Automatic Repeat Repeat reQuest) control is performed for each transport block. The transport block is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, transport blocks are mapped to codewords, and encoding is performed for each codeword.

{Also, the reference signal may be used for radio resource measurement (RRM). Further, the reference signal may be used for beam management.

Beam management includes analog and / or digital beams in a transmitting device (the base station device 3 in the case of downlink, and the terminal device 1 in the case of uplink) and a receiving device (the terminal device 1 in the case of downlink). (In the case of the uplink, the base station apparatus 3), the procedure of the base station apparatus 3 and / or the terminal apparatus 1 for matching the directivity of the analog and / or digital beams and obtaining the beam gain.

The procedure for configuring, setting, or establishing a beam pair link may include the following procedure.
・ Beam selection
・ Beam refinement
・ Beam recovery

{For example, beam selection may be a procedure for selecting a beam in communication between the base station device 3 and the terminal device 1. Further, the beam improvement may be a procedure of selecting a beam having a higher gain or changing a beam between the base station apparatus 3 and the terminal apparatus 1 optimally by moving the terminal apparatus 1. The beam recovery may be a procedure for reselecting a beam when the quality of a communication link is degraded due to a blockage caused by a shield or the passage of a person in communication between the base station device 3 and the terminal device 1.

Beam management may include beam selection and beam improvement. Beam recovery may include the following procedures.
Detection of beam failure detection of a new beam transmission of a beam recovery request monitoring of a response to a beam recovery request

For example, when selecting a transmission beam of the base station device 3 in the terminal device 1, CSI-RS or RSRP (Reference Signal Received Power) of SSS included in the SS / PBCH block may be used, or CSI may be used. Good. Further, a CSI-RS resource index (CRI: CSI-RS {Resource} Index) may be used as a report to the base station device 3, or a PBCH included in the SS / PBCH block and / or a demodulation used for demodulation of the PBCH. An index indicated by a reference signal (DMRS) sequence may be used.

Further, the base station apparatus 3 indicates a time index of CRI or SS / PBCH when instructing a beam to the terminal apparatus 1, and the terminal apparatus 1 receives a signal based on the instructed CRI or SS / PBCH time index. I do. At this time, the terminal device 1 may set and receive a spatial filter based on the designated CRI or SS / PBCH time index. In addition, the terminal device 1 may receive the data using an assumption of a pseudo-same location (QCL: Quasi @ Co-Location). A signal (antenna port, synchronization signal, reference signal, etc.) is "QCL" or another signal (antenna port, synchronization signal, reference signal, etc.) with another signal (antenna port, synchronization signal, reference signal, etc.) Can be interpreted as being associated with another signal.

Two antenna ports are said to be QCL if the Long Term Property of a channel carrying a symbol at one antenna port can be inferred from the channel carrying a symbol at the other antenna port. . The long-range characteristics of the channel include one or more of delay spread, Doppler spread, Doppler shift, average gain, and average delay. For example, if the antenna port 1 and the antenna port 2 are QCL with respect to the average delay, it means that the reception timing of the antenna port 2 can be inferred from the reception timing of the antenna port 1.

This QCL can be extended to beam management. For this purpose, a QCL extended to the space may be newly defined. For example, as the long-term property of a channel in the assumption of QCL in the spatial domain, the arrival angle (AoA (Angle of Arrival), ZoA (Zenith angle of Arrival), and / or the like) and / or angle spread in a radio link or a channel. (Angle Spread, for example, ASA (Angle Spread of Arrival) or ZSA (Zenith angle Spread of Arrival)), transmission angle (AoD, ZoD, etc.) and its angular spread (Angle Spread, such as ASD (Angle Spread of Departure) or ZSD ( Zenith angle Spread of Departure)), spatial correlation (Spatial Correlation), and reception spatial parameters.

For example, when the reception spatial parameter can be regarded as QCL between the antenna port 1 and the antenna port 2, the reception from the reception beam (reception spatial filter) for receiving the signal from the antenna port 1 receives the signal from the antenna port 2 It means that the beam can be inferred.

As the QCL type, a combination of long-range characteristics that may be regarded as a QCL may be defined. For example, the following types may be defined:
-Type A: Doppler shift, Doppler spread, average delay, delay spread-Type B: Doppler shift, Doppler spread-Type C: average delay, Doppler shift-Type D: reception spatial parameter

The above-mentioned QCL type sets and / or sets one or two reference signals and an assumption of QCL of PDCCH or PDSCH @ DMRS as a transmission setting instruction (TCI: Transmission Configuration Indication) in the RRC and / or MAC layer and / or DCI. You may instruct. For example, when the terminal device 1 sets and / or indicates the index # 2 of the PBCH / SS block and the QCL type A + QCL type D as one state of the TCI when receiving the PDCCH, the terminal device 1 performs PDCCH @ DMRS Is received, the PDCCH DMRS is received, and the synchronization and propagation path are considered as the Doppler shift, Doppler spread, average delay, delay spread, reception spatial parameters and the long-term characteristics of the channel in the reception of the PBCH / SS block index # 2. An estimate may be made. At this time, the reference signal indicated by the TCI (PBCH / SS block in the above example) is a source reference signal, and a reference affected by the long-term characteristic inferred from the long-term characteristic of the channel when the source reference signal is received. The signal (PDCCH @ DMRS in the above example) may be referred to as a target reference signal. In the TCI, a combination of a source reference signal and a QCL type may be set for a plurality of TCI states and each state by RRC, and may be instructed to the terminal device 1 by a MAC layer or DCI.

An example in which four TCIs are set by the RRC as an example of the TCI setting will be described. Here, NZP-CSI-RS-Resource # 1 and QCL type A + QCL type D are set in TCI-State # 0, and NZP-CSI-RS-Resource # 1 and QCL type B + QCL type D are set in TCI-State # 1. An example is shown in which SSB # 1 and QCL type A are set in TCI-State # 2, and SSB # 2 and QCL type A + QCL type D are set in TCI-State # 3. When the terminal device 1 sets and / or instructs TCI-State # 0 to NZP-CSI-RS-Resource # 3 as the setting of RS, NZP-CSI-RS-Resource # 3 becomes NZP-CSI-RS-Resource # 1 and QCL type A + QCL type D are set and / or designated. Also, when the terminal device 1 sets TCI-State # 2 in PDCCH @ DMRS, it means that SSB # 1 and QCL type A are set in PDCCH @ DMRS. Also, when the terminal device 1 sets and / or instructs TSCH-State # 2 in PDSCH @ DMRS, it means that SSB # 2 and QCL type A + QCL type D are set and / or instructed in PDSCH @ DMRS.

Similarly, when the terminal device 1 sets and / or instructs the index # 2 of the PBCH / SS block and the QCL type A + QCL type D as one state of the TCI when calculating the CSI, the terminal device 1 -When receiving the CSI-RS resource, the NZP-CSI-RS resource is regarded as a Doppler shift, a Doppler spread, an average delay, a delay spread, a reception spatial parameter, and a long-range characteristic of the channel in receiving the PBCH / SS block index # 2. May be received to perform synchronization or channel estimation. In addition, when the terminal device 1 receives and sets the index # 2 of the NZP-CSI-RS resource and the QCL type A + QCL type D as one state of the TCI when receiving the PDSCH, the terminal device 1 When receiving the PDSCH @ DMRS, the PDSCH DMRS is received by considering the Doppler shift, the Doppler spread, the average delay, the delay spread, the reception spatial parameters and the long-range characteristics of the channel in the reception of the NZP-CSI-RS resource index # 2. Synchronization or propagation path estimation may be performed. When combined with the above-described example, the PDCCH DMRS of the TCI corresponding to the PBCH / SS block index # 2 is received, the PDCCH is detected, and the assigned PDSCH is indicated by the DCI. NZP-CSI-RS resource The synchronization and the propagation path estimation may be performed by receiving the PDSCH @ DMRS of the TCI corresponding to the index # 2. At this time, the terminal device receives PDCCH @ DMRS in which PBCH / SS block index # 2 and QCL type D are set, and receives PDSCH @ DMRS in which NZP-CSI-RS resource index # 2 and QCL type D are set. 1, the reception space parameter may be switched. Since the switching of the reception space parameter includes the switching operation of the analog circuit and the like, it is necessary to secure a switching time. For example, from the completion of reception of the PDCCH instructing the downlink assignment, the reception start time of the instructed PDSCH cannot be met. Assuming a situation, when PDSCH allocation is notified at a time interval shorter than a preset threshold value counted from the last symbol of PDCCH, spatial parameter switching is not performed and the same spatial parameter as PDCCH DMRS reception is used. May be used to receive PDSCH.

With this method, the operations of the base station apparatus 3 and the terminal apparatus 1 equivalent to the beam management are defined by the assumption of the QCL in the spatial domain and the radio resources (time and / or frequency) as beam management and beam instruction / report. Good.

Hereinafter, the subframe will be described. In this embodiment, it is called a subframe, but may be called a resource unit, a radio frame, a time section, a time interval, or the like.

FIG. 2 is a diagram illustrating an example of a schematic configuration of an uplink and a downlink slot according to the first embodiment of the present invention. Each of the radio frames is 10 ms long. Each radio frame is composed of 10 subframes and W slots. One slot is composed of X OFDM symbols. That is, the length of one subframe is 1 ms. Each slot has a time length defined by a subcarrier interval. For example, when the subcarrier interval of the OFDM symbol is 15 kHz and NCP (Normal Cyclic Prefix), X = 7 or X = 14, which are 0.5 ms and 1 ms, respectively. When the subcarrier interval is 60 kHz, X = 7 or X = 14, which are 0.125 ms and 0.25 ms, respectively. For example, when X = 14, W = 10 when the subcarrier interval is 15 kHz, and W = 40 when the subcarrier interval is 60 kHz. FIG. 2 shows a case where X = 7 as an example. It should be noted that the same applies to the case where X = 14. Also, an uplink slot is defined similarly, and a downlink slot and an uplink slot may be defined separately. Further, the bandwidth of the cell in FIG. 2 may be defined as a part of the bandwidth (BWP: BandWidth Part). Further, a slot may be defined as a transmission time interval (TTI: Transmission @ Time @ Interval). A slot may not be defined as a TTI. The TTI may be a transmission period of a transport block.

The signal or physical channel transmitted in each of the slots may be represented by a resource grid. A resource grid is defined by multiple subcarriers and multiple OFDM symbols. The number of subcarriers forming one slot depends on the downlink and uplink bandwidth of the cell, respectively. Each of the elements in the resource grid is called a resource element. Resource elements may be identified using subcarrier numbers and OFDM symbol numbers.

The resource grid is used to represent the mapping of resource elements of a certain physical downlink channel (such as PDSCH) or uplink channel (such as PUSCH). For example, when the subcarrier interval is 15 kHz, the number of OFDM symbols included in the subframe is X = 14. In the case of NCP, one physical resource block is composed of 14 consecutive OFDM symbols in the time domain and 14 in the frequency domain. It is defined from 12 * Nmax consecutive subcarriers. Nmax is the maximum number of resource blocks determined by a subcarrier interval setting μ described later. That is, the resource grid is composed of (14 * 12 * Nmax, μ) resource elements. In the case of ECP (Extended @ CP), since it is supported only at a subcarrier interval of 60 kHz, one physical resource block is, for example, 12 (the number of OFDM symbols included in one slot) * 4 (included in one subframe) in the time domain. (Number of slots to be used) = 48 continuous OFDM symbols and 12 * Nmax, μ continuous subcarriers in the frequency domain. That is, the resource grid is composed of (48 * 12 * Nmax, μ) resource elements.

参照 Reference resource blocks, common resource blocks, physical resource blocks, and virtual resource blocks are defined as resource blocks. One resource block is defined as 12 continuous subcarriers in the frequency domain. The reference resource block is common to all subcarriers. For example, a resource block may be configured at a subcarrier interval of 15 kHz, and may be numbered in ascending order. Subcarrier index 0 in reference resource block index 0 may be referred to as reference point A (or simply referred to as "reference point"). The common resource block is a resource block that is numbered in ascending order from 0 at each subcarrier interval setting μ from the reference point A. The resource grid described above is defined by this common resource block. The physical resource blocks are resource blocks numbered in ascending order from 0 included in a bandwidth portion (BWP) described later, and the physical resource blocks are allocated in ascending order from 0 included in the bandwidth portion (BWP). This is a numbered resource block. A physical uplink channel is first mapped to a virtual resource block. Thereafter, the virtual resource blocks are mapped to physical resource blocks. (From TS38.211)

Next, the subcarrier interval setting μ will be described. As mentioned above, NR supports multiple OFDM numerologies. In a certain BWP, a subcarrier interval setting μ (μ = 0, 1,..., 5) and a cyclic prefix length are given in an upper layer (upper layer) with respect to a downlink BWP, Provided in the upper layer in BWP. Here, when μ is given, the subcarrier interval Δf is given by Δf = 2 ＾ μ · 15 (kHz).

In the subcarrier interval setting μ, slots are counted in ascending order from 0 to N ^ {subframe, μ} _ {slot} -1 in a subframe, and from 0 to N ^ {frame, μ} _ {slot } -1 is counted in ascending order. Based on the slot configuration and the cyclic prefix, N ^ {slot} _ {symb} consecutive OFDM symbols are in the slot. N ^ {slot} _ {symb} is 14. The start of slot n ^ {μ} _ {s} in a subframe is the start and time of the n ^ {μ} _ {s} N ^ {slot} _ {symb} th OFDM symbol in the same subframe. Are aligned.

Next, subframes, slots, and minislots will be described. FIG. 3 is a diagram illustrating the relationship in the time domain between subframes, slots, and minislots. As shown in the figure, three types of time units are defined. The subframe is 1 ms regardless of the subcarrier interval, the number of OFDM symbols included in the slot is 7 or 14, and the slot length varies depending on the subcarrier interval. Here, when the subcarrier interval is 15 kHz, 14 OFDM symbols are included in one subframe. The downlink slot may be referred to as PDSCH mapping type A. Uplink slots may be referred to as PUSCH mapping type A.

A minislot (which may be referred to as a subslot) is a time unit composed of fewer OFDM symbols than the number of OFDM symbols included in the slot. The figure shows an example where the minislot is composed of 2 OFDM symbols. An OFDM symbol in a mini-slot may coincide with the OFDM symbol timing making up the slot. The minimum unit of scheduling may be a slot or a minislot. Assigning minislots may also be referred to as non-slot based scheduling. In addition, scheduling a minislot may be expressed as scheduling a resource whose relative time position between the reference signal and the data start position is fixed. The downlink minislot may be referred to as PDSCH mapping type B. An uplink minislot may be referred to as PUSCH mapping type B.

FIG. 4 is a diagram illustrating an example of the slot format. Here, a case where the slot length is 1 ms at a subcarrier interval of 15 kHz is shown as an example. In the figure, D indicates downlink and U indicates uplink. As shown in the figure, within a certain time interval (for example, the minimum time interval that must be assigned to one UE in the system)
One or more of downlink symbols, flexible symbols, and uplink symbols may be included. Note that these ratios may be predetermined as a slot format. Also, it may be defined by the number of downlink OFDM symbols included in the slot or the start position and the end position in the slot. Also, it may be defined by the number of uplink OFDM symbols or DFT-S-OFDM symbols included in the slot, or the start position and the end position in the slot. It should be noted that scheduling a slot may be expressed as scheduling a resource whose relative time position between the reference signal and the slot boundary is fixed.

The terminal device 1 may receive a downlink signal or a downlink channel using a downlink symbol or a flexible symbol. The terminal device 1 may transmit an uplink signal or a downlink channel using an uplink symbol or a flexible symbol.

4A may be referred to as a certain time section (for example, a minimum unit of a time resource that can be allocated to one UE, or a time unit. Also, a plurality of the minimum units of a time resource are bundled and called a time unit. FIG. 4B illustrates an example in which uplink scheduling is performed using, for example, a PDCCH in the first time resource, and processing delay of the PDCCH and downlink are performed. To transmit an uplink signal through a flexible symbol including an uplink switching time and generation of a transmission signal. FIG. 4 (c) is used for the transmission of the PDCCH and / or the downlink PDSCH in the first time resource, and the PUSCH or PUCCH via the processing delay and the switching time from the downlink to the uplink and the gap for generating the transmission signal. Is used for transmission. Here, as an example, the uplink signal may be used for transmission of HARQ-ACK and / or CSI, that is, UCI. FIG. 4 (d) is used for transmission of the PDCCH and / or PDSCH in the first time resource, and uses the processing delay and the switching time from downlink to uplink, the PUSCH and / or uplink through the gap for generating the transmission signal. Alternatively, it is used for PUCCH transmission. Here, as an example, the uplink signal may be used for transmission of uplink data, that is, UL-SCH. FIG. 4E shows an example in which all the signals are used for uplink transmission (PUSCH or PUCCH).

下り The above-mentioned downlink part and uplink part may be composed of a plurality of OFDM symbols as in LTE.

FIG. 5 is a diagram showing an example of beam forming. The plurality of antenna elements are connected to one transmission unit (TXRU: Transceiver unit) 10, the phase is controlled by a phase shifter 11 for each antenna element, and transmitted from the antenna element 12 to transmit signals in an arbitrary direction. Can direct the beam. Typically, TXRU may be defined as an antenna port, and in terminal device 1, only an antenna port may be defined. By controlling the phase shifter 11, directivity can be directed in an arbitrary direction, so that the base station apparatus 3 can communicate with the terminal apparatus 1 using a beam having a high gain.

Hereinafter, the band portion (BWP) will be described. BWP is also called carrier BWP. The BWP may be set for each of the downlink and the uplink. BWP is defined as a set of contiguous physical resources selected from a contiguous subset of a common resource block. The terminal device 1 can set up to four BWPs in which one downlink carrier BWP is activated at a certain time. The terminal device 1 can set up to four BWPs in which one uplink carrier BWP is activated at a certain time. In the case of carrier aggregation, BWP may be set in each serving cell. At this time, the fact that one BWP is set in a certain serving cell may be expressed as not setting the BWP. The setting of two or more BWPs may be expressed as the setting of the BWP.

<MAC entity operation>
In an activated serving cell, there is always one active (activated) BWP. BWP switching for a serving cell is used to activate an inactive (deactivated) BWP and deactivate an active (activated) BWP. Is done. BWP switching for a certain serving cell is controlled by a PDCCH indicating a downlink assignment or an uplink grant. BWP switching for a serving cell may be further controlled by the MAC entity itself at the start of a BWP inactivity timer or a random access procedure. In addition of SpCell (PCell or PSCell) or activation of SCell, one BWP is initially active without receiving a PDCCH indicating a downlink assignment or an uplink grant. The initially active BWP may be specified in an RRC message sent from the base station device 3 to the terminal device 1. The active BWP for a certain serving cell is specified by RRC or PDCCH sent from base station apparatus 3 to terminal apparatus 1. In an unpaired spectrum (such as a TDD band), DL BWP and UL BWP are paired, and BWP switching is common to UL and DL. In the active BWP for each of the activated serving cells in which the BWP is set, the MAC entity of the terminal device 1 applies a normal process. The normal processing includes transmitting a UL-SCH, transmitting a RACH, monitoring a PDCCH, transmitting a PUCCH, transmitting an SRS, and receiving a DL-SCH. For each activated serving cell for which BWP is configured, in an inactive BWP, the MAC entity of the terminal device 1 does not transmit the UL-SCH, does not transmit the RACH, does not monitor the PDCCH, does not transmit the PUCCH, It does not transmit SRS and does not receive DL-SCH. If a serving cell is deactivated, there may be no active BWP (eg, the active BWP is deactivated).

<RRC operation>
A BWP information element (IE) included in an RRC message (system information to be broadcast or information sent in a dedicated RRC message) is used for setting BWP. The RRC message transmitted from the base station device 3 is received by the terminal device 1. For each serving cell, the network (eg, base station device 3) has at least one downlink BWP and one (if the serving cell is configured for uplink) or two (appendix uplink (supplementary uplink)). At least an initial BWP (initial BWP) including the uplink BWP in the case where is used is set for the terminal device 1. Further, the network may configure additional uplink and downlink BWPs for certain serving cells. BWP configuration is divided into uplink parameters and downlink parameters. In addition, the BWP setting is divided into a common parameter and a dedicated parameter. Common parameters (such as BWP uplink common IE and BWP downlink common IE) are cell-specific. The common parameters of the primary BWP of the primary cell are also provided in the system information. For all other serving cells, the network provides common parameters with dedicated signals. BWP is identified by BWP ID. The initial BWP has a BWP ID of 0. BWP IDs of other BWPs take values from 1 to 4.

専用 Dedicated parameters for uplink BWP include SRS settings. The uplink BWP corresponding to the dedicated parameter of the uplink BWP is associated with one or more SRSs corresponding to the SRS setting included in the dedicated parameter of the uplink BWP.

In the terminal device 1, one primary cell and up to 15 secondary cells may be set.

The time and frequency resources for reporting the CSI used by the terminal device 1 are controlled by the base station device 3. The CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), CRI (CSI-RS Resource Indicator), LI (Layer Indication), RI (rank indication), and / or L1-RSRP (Layer-1 Reference Signal Signal Received). Power). For the CQI, PMI, CRI, LI, RI, and L1-RSRP, the terminal device 1 sets N (N is 1 or more) CSI reporting, and M (M is 1 or more) CSI reference signal (CSI-RS ), And settings relating to one CSI measurement including L (L is 1 or more) links are set by the upper layer. The settings for CSI measurement include a list of settings for CSI reporting, a list of settings for CSI resources, a list of link settings, and a list of trigger states. Hereinafter, each will be described.

Each of the settings for CSI reporting is associated with one downlink BWP (upper layer BWP identity), and for each of the settings for CSI reporting, the reported parameters include:
• One identity to identify settings for CSI reporting • Time domain operation (eg, periodic, semi-persistent, or aperiodic)
-Reported CSI parameters (eg, CRI, RI, PMI, CQI, etc.)
-Setting of frequency domain (Information for setting wideband CQI or subband CQI and information for setting wideband PMI or subband PMI are included, respectively)
-Setting of CSI measurement restriction (measurement restriction configuration, may be set for each of channel measurement and interference measurement)
-Codebook setting (setting of CSI type (information indicating type 1 or type 2) and codebook subset restriction)
-Maximum number of CQIs per report (may be information indicating 1 codeword or 2 codewords)
Assumption of CQI table (CQI table including up to 64 QAM, CQI table including up to 256 QAM, URLLC, etc.)

Each of the settings for the CSI resources includes information on S (S is 1 or more) CSI-RS resource sets, and each CSI-RS resource set includes a plurality of CSI-RS resources (NZPs for channel measurement or interference measurement). -Contains settings related to CSI-RS, CSI-IM (InterferencementMeasurement) resources for interference measurement, and SS / PBCH block resources used for L1-RSRP calculation. Here, the NZP-CSI-RS resource is a CSI-RS in which a sequence is generated according to a generation method defined in advance in specifications and mapped to a resource element to which the CSI-RS is mapped. The NZP-CSI-RS may be expressed as a non-zero power channel state information reference signal. Also, each of the settings for the CSI resources is placed in an identified BWP in the upper layer, and the settings for all the CSI resources associated with the settings for one CSI report are the same BWP. Just as the channel state information reference signal is expressed as NZP-CSI-RS, the CSI-IM may be expressed as ZP-CSI-RS or zero power channel state information reference signal.

Next, the above-described channel measurement and interference measurement will be described. Channel measurement is to measure a quantity related to the quality of each layer or each codeword assuming a downlink desired signal or channel or spatial multiplexing for CSI measurement, and interference measurement is to measure CSI measurement for CSI measurement. It is to measure the amount of interference in each layer or codeword assuming a downlink interference signal or channel or spatial multiplexing. Here, the layer is the number of PDSCHs spatially multiplexed.

Here, the ZP-CSI-RS for interference measurement may be configured and / or indicated in the RRC and / or MAC layer and / or DCI.

Note that the settings (ssb-Resources) related to the SS / PBCH block resources used for the L1-RSRP calculation may be included in each of the settings related to the CSI resources.

Also, each of the settings related to the CSI resource may include a time-domain operation of the CSI-RS resource. In addition, the setting for each CSI-RS resource set may include the operation of the CSI-RS resource in the time domain.

FIG. 6 shows an example of CSI resource settings and ZP-CSI-RS resource settings. Here, NZP-CSI-RS resource set # 0 and NZP-CSI-RS resource set # 1 that use an aperiodic transmission method as a time domain operation are set in CSI resource setting # 1, and CSI resource setting # 2 2 shows an example in which an NZP-CSI-RS resource set # 2 and an NZP-CSI-RS resource set # 3 that use a periodic transmission method as an operation in the time domain are respectively set. Each NZP-CSI-RS resource set includes one or more NZP-CSI-RSs. The NZP-CSI-RS resource that uses the aperiodic transmission method includes a time-frequency resource setting, and QCL information may be set. The NZP-CSI-RS resource that adopts a periodic or semi-persistent transmission method includes a period and offset setting and a time-frequency resource setting, and QCL information may be set. The ZP-CSI-RS resource setting may be set for each downlink BWP. Here, the ZP-CSI-RS resource # that uses a periodic transmission method as a time domain operation is set in the ZP-CSI-RS resource set setting # 0. 0 and a ZP-CSI-RS resource # 1 are set, and a ZP-CSI-RS resource # 2 and a ZP-CSI that adopt a semi-persistent transmission method as a time domain operation in a ZP-CSI-RS resource set setting # 2. -RS resource # 3 is set, and ZP-CSI-RS resource # 4 and ZP-CSI-RS resource # 5 adopting an aperiodic transmission method as a time domain operation in ZP-CSI-RS resource set setting # 2. Are respectively set. For a ZP-CSI-RS resource employing a periodic or semi-persistent transmission method, a period and offset setting and a time-frequency resource setting are set. The time-frequency resource setting is set for the ZP-CSI-RS resource that uses the aperiodic transmission method.

As an example of the CSI report using the aperiodic CSI resource configuration, when the configuration of the CSI report triggered by the uplink grant includes the aperiodic CSI resource configuration, the NZP-CSI-RS resource is transmitted, and A triggered CSI report may be provided. As an example of the instruction using the ZP-CSI-RS resource setting, when the PDSCH allocation is instructed to the downlink BWP in which the ZP-CSI-RS resource is set, the time-domain operation is performed on the PDSCH-allocated slot. A ZP-CSI-RS resource using an aperiodic transmission method may be applied. As another example using the ZP-CSI-RS resource configuration, when PDSCH allocation is instructed to the downlink BWP in which the ZP-CSI-RS resource is configured, a periodic transmission method is performed as a time domain operation. ZP-CSI-RS resources activated by DCI or MAC @ CE and RRC signaling among ZP-CSI-RS resources and / or ZP-CSI-RS resources adopting a semi-persistent transmission method. It may be.

設定 The setting of each link includes an indication of a setting related to a CSI report, an indication of a CSI setting, and an indication indicating whether to measure a channel measurement or an interference measurement. Also, the configuration of each link may include multiple trigger states for dynamically selecting a configuration for CSI reporting for one or more aperiodic CSI reports.

Each trigger state is associated with a setting for one or more CSI reports, and a setting for each CSI report is tied to a setting for one or more periodic or semi-persistent or aperiodic CSI reference signals. I have. Here, the terminal device may assume the following depending on the number of settings related to the linked CSI resource.
When the setting for one CSI resource is set, the resource setting is for channel measurement for L1-RSRP calculation. When the setting for two CSI resources is set, the setting for the first CSI resource. Is for channel measurement, and the setting for the second CSI resource is for interference measurement on ZP-CSI-RS resource or NZP-CSI-RS resource.
-When the settings for three CSI resources are set, the settings for the first CSI resource are for channel measurement, and the settings for the second CSI resource are for interference measurement on the ZP-CSI-RS resource. And the setting for the third CSI resource is for measuring interference on the NZP-CSI-RS resource.

For CSI measurement, the terminal device 1 may assume the following.
Each NZP-CSI-RS port configured for interference measurement corresponds to the transmission layer of the interference,
The transmission layer of all interference on the NZP-CSI-RS port takes into account the associated energy per resource element (EPRE), and the NZP-CSI-RS resource for channel measurement, or interference There are other interfering signals on CSI-RS resources for measurement or ZP-CSI-RS resources for interference measurement.

Here, EPRE indicates the energy of NZP-CSI-RS per resource element. Specifically, the base station apparatus 3 determines the ratio of PDSCH @ EPRE to EPRE of NZP-CSI-RS (Pc), the ratio of PDCCH @ EPRE to EPRE of NZP-CSI-RS (Pc-PDCCH), and NZP-CSI-RS. , The ratio (Pc_SS) of the EPRE of the SS / PBCH block to that of the EPRE is set. Thus, the CSI-RS @ EPRE can be considered in the CSI measurement based on the energy ratio set.

When reporting the CSI, the terminal device 1 may determine whether a certain slot is a downlink slot effective for calculating each index of the CSI. More specifically, when a certain slot satisfies the following conditions, it is determined to be a valid downlink slot.
-At least one symbol or more downlink symbols or flexible symbols are included by the upper layer setting, and-It is not a gap section for mobility measurement for the terminal device 1, and-CSI resources for at least one time channel measurement or interference measurement are used. There is a transmission opportunity.
Here, the time-frequency resource in which the ZP-CSI-RS set and / or designated by the RRC and / or the MAC layer and / or the DCI for interference measurement is arranged is separately set and / or designated by the NZP-CSI. -Time and frequency resources in which RSs are arranged can be different. In particular, when the time-frequency resource where the latter NZP-CSI-RS is arranged exceeds the range of the time-frequency resource where the former ZP-CSI-RS is arranged, as an example, the time when the ZP-CSI-RS is arranged Since the PDSCH is transmitted in a frequency resource other than the frequency resource, an unexpected interference component is included in the time-frequency resource in which the NZP-CSI-RS used for channel measurement is arranged, and each index of the CSI expected in advance is calculated. Cannot be performed. For this reason, when the time-frequency resource in which the NZP-CSI-RS is arranged is not limited to part or all of the time-frequency resource in which the ZP-CSI-RS is arranged, the terminal device 1 makes the slot effective. It is determined that the slot is not a proper slot.

When specifying the time-frequency resource in which the ZP-CSI-RS is arranged, the ZP-CSI-RS is indicated in the slot of the ZP-CSI-RS to which the aperiodic transmission method is applied. If another PDSCH of the DCI is transmitted, it is determined that the slot is not a valid slot.

When the operation of the NZP-CSI-RS resource in the time domain is periodic or semi-persistent, the terminal device 1 does not include the above-mentioned ineffective slot and does not include the NZP-CSI-RS resource in the effective slot observed in the past. Is used to calculate and report at least one of CQI, PMI, CRI, LI, RI, and L1-RSRP, which are each index of CSI.

One or more CSI reports for channel measurement and / or interference measurement on one or more component carriers for a CSI-RS resource set whose operation in the time domain of the CSI-RS resource set is aperiodic A configuration for and / or a trigger state for one or more CSI-RS resource sets is configured at a higher layer. For triggering an aperiodic CSI report, one set of CSI trigger states is set in upper layer parameters, and the CSI trigger states are associated with any one candidate of DL @ BWP. The terminal device 1 does not expect to be triggered a CSI report for a downlink BWP that has not been activated. Each trigger state is started using a CSI request field included in DCI (for example, DCI format 0_1).

The terminal device 1 does not perform the CSI calculation and report when the operation of the NZP-CSI-RS resource in the time domain is aperiodic, and when instructed to calculate the CSI in the invalid slot, An uplink data signal is generated and transmitted according to the instruction of DCI format 0_1 including the channel state information request. The uplink data signal at this time may be a HARQ response signal to downlink data or uplink data. Further, when the terminal device 1 is instructed to calculate the CSI in the invalid slot, the terminal device 1 may determine that the DCI is not valid, ignore the uplink grant, and not transmit the uplink signal. .

時間 The time and frequency resources for transmitting the SRS used by the terminal device 1 are controlled by the base station device 3. More specifically, the setting given by the upper layer for BWP includes the setting for SRS. The setting related to the SRS includes the setting of the SRS resource, the setting related to the SRS resource set, and the setting of the trigger state. Hereinafter, each will be described.

A case where one or more SRS resources are set will be described. The base station device 3 sets a plurality of SRS resources for the terminal device 1. The multiple SRS resources are associated with multiple symbols behind the uplink slot. For example, it is assumed that four SRS resources are set and each of the four symbols behind the slot is associated with each SRS resource. The terminal device 1 transmits an SRS symbol using a transmission beam (transmission filter).

As an example, a case where SRS resources (expressed as SRS resources # 1, # 2, # 3, and # 4, respectively) are set using four SRS symbols (expressed as S1, S2, S3, and S4, respectively) explain. S1 is an SRS resource associated with SRS resource # 1, S2 is an SRS resource associated with SRS resource # 2, S3 is an SRS resource associated with SRS resource # 3, and S4 is an SRS resource associated with SRS resource # 4. As a resource, the terminal device 1 transmits an SRS by applying a transmission beam for each resource based on this setting.

The terminal device 1 may transmit using a different transmission antenna port for each SRS resource. For example, the SRS may be transmitted using the antenna port 10 in S1, the antenna port 11 in S2, the antenna port 12 in S3, and the antenna port 13 in S4.

The terminal device 1 may transmit using a plurality of transmission antenna ports or transmission antenna port groups for each SRS resource. For example, transmission may be performed using the

antenna ports

10 and 11 in S1, and using the

antenna ports

12 and 13 in S2.

The setting of the SRS resource includes spatial relation information (Spatial Relation Info). The spatial relation information is information for obtaining a beam gain by applying the separately applied reception or transmission filter setting to the transmission filter of the sounding reference signal. To specify the separately applied reception or transmission filter setting, one of a synchronization signal block, a CSI reference signal, and a sounding reference signal is set as a signal to be received or transmitted.

The setting of the SRS resource may include at least one or more of the following information elements in addition to the spatial relation information.
(1) Information about a symbol for transmitting a sounding reference signal or index (2) Information about an antenna port for transmitting a sounding reference signal (3) Frequency hopping pattern of the sounding reference signal

The terminal device 1 may be configured with an SRS resource set including one or more SRS resource configurations.

The SRS resource set configuration may include information on an associated CSI reference signal (associated CSI-RS) in addition to information on transmission power control applied to SRS resources included in the set.

The SRS resource setting and / or SRS resource set setting may include information for setting an operation in the time domain. The information for setting the operation in the time domain sets one of periodic (periodic), semi-persistent, and aperiodic.

The base station apparatus 3 selects one or more of the set SRS resources, and transmits an SRI (SRS {Resource} Index) for transmitting the PUSCH, an index associated with the SRS resource, or an index associated with the SRI. May be instructed to the terminal device 1 by DCI or MAC @ CE, RRC signaling. The terminal device 1 transmits an SRI (SRS @ Resource @ Index), an index associated with the SRS resource, or an index associated with the SRI among the set SRS resources from the base station device 3 by DCI or MAC @ CE and RRC signaling. You may receive it. The terminal device 1 performs PUSCH transmission using one or more antenna ports of DMRS (demodulation reference signal) and / or one or more antenna ports of PUSCH associated with the designated SRS resource. For example, the terminal device 1 transmits the SRS using the transmission beams # 1 to # 4 using four SRS resources, and when the base station device 3 instructs the SRS resource # 2 as the SRI, the terminal device 1 The PUSCH may be transmitted using # 2. Also, when a plurality of SRS resources are specified, PUSCH is performed by MIMO spatial multiplexing (MIMO SM) using a plurality of transmission beams used in the SRS resources associated with the specified SRI. May be transmitted.

The base station apparatus 3 selects one or more of the set SRS resources and transmits an SRI (SRS {Resource} Index) for transmitting the PUCCH, an index associated with the SRS resource, or an index associated with the SRI. May be instructed to the terminal device 1 by DCI or MAC @ CE, RRC signaling. Information for specifying the SRS resource associated with the PUCCH is included in DCI for performing downlink resource allocation. The terminal device 1 decodes the PDSCH based on the DCI for performing downlink resource allocation, and transmits HARQ-ACK on the PUCCH resource indicated by the DCI for performing downlink resource allocation. The terminal device 1 transmits an SRI (SRS @ Resource @ Index), an index associated with the SRS resource, or an index associated with the SRI among the set SRS resources from the base station device 3 by DCI or MAC @ CE and RRC signaling. You may receive it. The terminal device 1 performs PUCCH transmission using one or more antenna ports of DMRS (demodulation reference signal) and / or one or more antenna ports of PUCCH associated with the designated SRS resource.

The base station apparatus 3 may associate the information of the cycle and the offset with the SRS resource for which the operation in the time domain is set to be periodic among the SRS resources, and instruct the terminal apparatus 1 by DCI or MAC @ CE and RRC signaling. The terminal device 1 periodically performs the SRS transmission on the SRS resources for which the operation in the time domain is set to be periodic among the SRS resources, using the information of the transmission cycle and the offset associated with the SRS resources.

The base station apparatus 3 may associate the information of the period and the offset with the SRS resource in which the operation in the time domain is set as semi-persistent among the SRS resources, and instruct the terminal apparatus 1 by DCI or MAC @ CE and RRC signaling. . The base station device 3 instructs the terminal device 1 to activate / deactivate the SRS resource by DCI or MAC @ CE and RRC signaling for the SRS resource for which the operation in the time domain is set as semi-persistent among the SRS resources. May be. The terminal device 1 activates / deactivates the SRS resource for each SRS resource for which the operation in the time domain is set to be semi-persistent among the set SRS resources by DCI or MAC @ CE, and RRC signaling. May be received. When receiving the activation instruction, the terminal device 1 receives information or an index related to a symbol for transmitting the SRS, and / or information about an antenna port for transmitting the SRS, and / or information of the SRS associated with the specified SRS resource. Using the information of the frequency hopping pattern, the SRS is periodically transmitted using the information of the cycle and the offset associated with the designated SRS resource. When receiving the deactivation instruction, the terminal device 1 stops SRS transmission of the specified SRS resource.

The base station apparatus 3 may instruct the terminal apparatus 1 to issue an SRS transmission request by DCI or MAC @ CE and RRC signaling for the SRS resource for which the operation in the time domain is set to be non-periodic among the SRS resources. The terminal device 1 may receive an SRS transmission request from the base station device 3 by DCI, MAC @ CE, or RRC signaling for the SRS resource for which the operation in the time domain is set to be non-periodic among the set SRS resources. . When the terminal device 1 receives the SRS transmission request, the information or index relating to the symbol for transmitting the SRS, and / or the information regarding the antenna port for transmitting the SRS, and / or the frequency of the SRS associated with the specified SRS resource Using the information of the hopping pattern, SRS transmission is performed using the information of the period and offset associated with the designated SRS resource. The SRS transmission request includes one or more trigger states, and each SRS resource setting and / or each SRS in which the time domain operation of each SRS resource setting and / or each SRS resource set setting is set to be non-periodic. The resource set settings are associated with one or more trigger states.

Next, the setting of the trigger state will be described. Each trigger state is associated with a setting for one or more SRS resource sets.

One or more for uplink channel state information (CSI) and / or channel sounding and / or beam management on one or more component carriers for SRS resource sets whose operation in the time domain is aperiodic; A trigger state for SRS transmission in a plurality of SRS resource sets is set in an upper layer. For triggering SRS transmission in a non-periodic SRS resource set, one set of SRS trigger states is set in upper layer parameters. Each trigger state is indicated using an SRS request field included in DCI (for example, DCI format 0_1, DCI format 1_1, DCI format 2_3).

At this time, the terminal device performs the following operation.
If the value of the SRS request field is 0, no SRS transmission is requested. If the value of the SRS request field is 1 or 2 or 3, the SRS transmission is performed based on the setting for the SRS resource set associated with the corresponding trigger state. I do. At this time, the terminal device transmits an SRS from the SRS resource set based on the setting information included in the setting related to the SRS resource.

設定 The setting related to each SRS resource set includes information for setting operation in the time domain, and an index or identity of a signal related to spatial relation information.

Next, an example of an RRC setting for an SRS in a certain serving cell # 1 and an example of an SRS request field will be described. Here, it is assumed that the number of BWPs set in the serving cell is two. A list of settings related to the BWP index # 1 in the serving cell # 1 is set in the information about the SRS of the serving cell # 1, and four settings related to the SRS resource set are set in the list. Among them, the setting of the aperiodic SRS resource set is the setting # 1 to # 3 related to the SRS resource set.

Setting # 1 for the SRS resource set is associated with trigger state # 1, setting # 2 for the SRS resource set is associated with trigger state # 2, and setting # 3 for the SRS resource set is associated with trigger state # 3. ing. “00” in the SRS request field does not transmit the SRS. Trigger state # 0 is associated with "01", trigger state # 1 with "10", and trigger state # 2 with "11".

The terminal device 1 transmits the SRS based on the setting related to the SRS set by the RRC and the setting related to the SRS resource set associated with the value of the SRS request field included in the DCI. At this time, the terminal device 1 transmits the SRS from the setting related to the SRS resource set associated with the setting related to the SRS based on the setting information included in the setting related to the SRS.

設定 Also, the settings for each SRS are associated with the BWP in the serving cell. As an example, SRS configuration # 1 may be associated with BWP index # 1.

Here, in the example described above, one SRS request field is set to one SRS resource set, but a plurality of SRS resource sets may be associated with each other.

4 shows an example of an SRS setting and an SRS request field set by RRC in two serving cells. Here, each of the settings related to the SRS resource set whose time operation is aperiodic is associated with a trigger state.

The terminal device 1 transmits the SRS resource set in the serving cell # 1 when 10 is indicated as the value of the SRS request field. That is, the value (information) of the SRS request field indicates one of the plurality of trigger states, and each of the plurality of trigger states is set for each serving cell and is associated with the setting of one or more SRS resource sets. . Note that the value of the SRS request field may be paraphrased with information included in the SRS request field.

Here, “active” is set as the BWP index of the SRS setting # 2, not the actual index of the set BWP. This means that it is associated with the activated BWP. For example, when the BWP indicating the BWP index # 1 is activated in a certain slot for the terminal device 1, the SRS setting # 2 is a setting corresponding to the activated BWP index # 1, and the terminal device 1 transmits the corresponding BRS # 1 SRS resource set. That is, the SRS request field included in the DCI of the PDCCH includes trigger states, each trigger state is associated with a setting for one or more SRS resource sets, and the SRS setting is associated with an activated BWP of the serving cell c. May be set to be set.

Next, an example in which two serving cells are set will be described. Here, an example is shown in which two are set as the number of serving cells, and a trigger state is assigned to a setting related to an aperiodic SRS resource set in each cell. A plurality of aperiodic SRS resource set settings may be associated with the SRS request field, and the trigger state # 0 of the serving cell # 1 and the trigger state # 0 of the serving cell # 2 are set to the code point "01". It shall be.

Here, in a certain slot, when “10” is instructed to the terminal device 1 as the value of the SRS request field, the terminal device 1 transmits the SRS resource set of the BWP # 1 of the serving cell # 1 and the BWP of the serving cell # 2. # 1 SRS resource set is transmitted. At this time, when both BWP # 1 of serving cell # 1 and BWP # 1 of serving cell # 2 are activated, terminal apparatus 1 sets SRS resource set of BWP # 1 of serving cell # 1 and BWP # 1 of serving cell # 2. Send

{Circle around (2)} If the BWP # 1 of the serving cell # 1 is activated and the BWP # 2 of the serving cell # 2 is activated, the terminal device 1 reports the CSI of the BWP # 1 of the serving cell # 1. In this way, a plurality of serving cells are set, and the SRS resource set of each serving cell indicated by the value of the SRS request field is transmitted. That is, the terminal device 1 receives the PDCCH carrying the DCI including the SRS request field, and when an SRS transmission request of BWP in a plurality of serving cells is triggered based on the SRS request field, the activated BWP index is Transmit the indicated BWP CSI report. At this time, the SRS request field indicates a trigger state, and the trigger state indicates one of a plurality of states. Each state of the plurality of states is set for each serving cell and is associated with a setting for one or more SRS resource sets and a setting for one or more SRS resource sets and a BWP index in each serving cell.

In the above example, a case has been described where the setting related to the SRS resource set of each serving cell is always associated with the setting related to the BWP index. However, when there is one BWP, the information to be associated may not be set. In this case, the SRS resource set may be transmitted based on the bandwidth of the serving cell.

Further, in the above example, the setting related to the SRS resource set includes information indicating the index of the trigger state. However, the setting related to the SRS resource set includes a list of trigger states, and the setting related to which SRS resource set each trigger state includes. It may be set.

Hereinafter, a spatial domain transmission filter applied to sounding reference signal transmission will be described.

As described above, the base station apparatus 3 can set the CSI reference signal (associated CSI-RS) corresponding to the setting of a certain SRS resource set to the terminal apparatus 1. The terminal device 1 in which a certain CSI reference signal is set as a corresponding CSI reference signal receives various downlink signals. The terminal device 1 specifies a corresponding CSI reference signal associated with the SRS resource set by setting the SRS among various downlink signals, and specifies a spatial domain reception filter applied when the corresponding CSI reference signal is received. Further, when transmitting the SRS resource set, the terminal device 1 applies the spatial domain reception filter as a spatial domain transmission filter and transmits the SRS resource set. Further, as the setting of the spatial relation information for the SRS resource set whose time operation is aperiodic, an NZP-CSI-RS resource in which the time domain operation is set to be aperiodic is set in a CSI reference signal for setting the spatial relation information. Alternatively, the transmission instruction of the NZP-CSI-RS resource may be given by the DCI of the SRS request.

Next, identification of a spatial domain reception filter and transmission of SRS resources in consideration of ZP-CSI-RS resources will be described. The time-frequency resource in which the ZP-CSI-RS configured and / or designated by the RRC and / or the MAC layer and / or the DCI for interference measurement is arranged is different from that of the separately configured and / or designated NZP-CSI-RS. The arranged time-frequency resources can be different arrangements. In particular, when the time-frequency resource where the latter NZP-CSI-RS is arranged exceeds the range of the time-frequency resource where the former ZP-CSI-RS is arranged, as an example, the time when the ZP-CSI-RS is arranged When the PDSCH is transmitted using a frequency resource other than the frequency resource, an unexpected interference component is included in the time-frequency resource in which the NZP-CSI-RS used for specifying the spatial domain reception filter is arranged. The transmission filter cannot be calculated. Similarly, when calculating the spatial domain transmission filter, the terminal device 1 may determine whether a certain slot is a downlink slot effective for calculating each index of CSI. As described above, a certain slot may be determined to be a valid downlink slot when the following conditions are satisfied.
-At least one symbol or more downlink symbols or flexible symbols are included by the upper layer setting, and-It is not a gap section for mobility measurement for the terminal device 1, and-CSI resources for at least one time channel measurement or interference measurement are used. There is a transmission opportunity.

If the time-frequency resource where the NZP-CSI-RS is arranged is not limited to a part or all of the time-frequency resource where the ZP-CSI-RS is arranged, the terminal apparatus 1 The SRS resource is transmitted using the spatial domain transmission filter applied to the transmission of the SRS. In addition, the terminal device 1 determines that the time-frequency resource in which the NZP-CSI-RS is allocated is not limited to part or all of the time-frequency resource in which the ZP-CSI-RS is allocated. The transmission may not be performed, and the SRS resource may be transmitted after the next reception timing of the CSI reference signal.

One aspect of the present embodiment may be operated in carrier aggregation or dual connectivity with a radio access technology (RAT: Radio Access Technology) such as LTE or LTE-A / LTE-A Pro. At this time, some or all cells or cell groups, carriers or carrier groups (for example, a primary cell (PCell: \ Primary \ Cell), a secondary cell (SCell: \ Secondary \ Cell), a primary secondary cell (PSCell), and an MCG (Master Cell Group) ), SCG (Secondary Cell Group), etc.). Further, it may be used as a stand-alone that operates alone. In the dual connectivity operation, SpCell (Special @ Cell) is referred to as PCell of MCG or PSCell of SCG, respectively, depending on whether the MAC entity is associated with MCG or SCG. If it is not a dual connectivity operation, SpCell (Special @ Cell) is called PCell. SpCell (Special @ Cell) supports PUCCH transmission and contention-based random access.

Hereinafter, the configuration of the device according to the present embodiment will be described. Here, an example is shown in which CP-OFDM is applied as a downlink radio transmission scheme, and CP-OFDM or DFTS-OFDM (SC-FDM) is applied as an uplink radio transmission scheme.

FIG. 7 is a schematic block diagram showing the configuration of the terminal device 1 of the present embodiment. As illustrated, the terminal device 1 includes an upper layer processing unit 101, a control unit 103, a receiving unit 105, a transmitting unit 107, and a transmitting / receiving antenna 109. Further, the upper layer processing unit 101 is configured to include a radio resource control unit 1011, a scheduling information interpretation unit 1013, a channel state information report control unit 1015, and a sounding reference signal control unit 1017. The receiving unit 105 includes a decoding unit 1051, a demodulation unit 1053, a demultiplexing unit 1055, a wireless reception unit 1057, and a measurement unit 1059. Further, transmitting section 107 is configured to include coding section 1071, modulating section 1073, multiplexing section 1075, radio transmitting section 1077, and uplink reference signal generating section 1079.

(4) The upper layer processing unit 101 outputs the uplink data (transport block) generated by a user operation or the like to the transmission unit 107. The upper layer processing unit 101 includes a medium access control (MAC: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: \ RLC) layer, and a radio resource control. (Radio \ Resource \ Control: \ RRC) layer processing.

(4) The radio resource control unit 1011 included in the upper layer processing unit 101 manages various setting information of its own device. Further, the radio resource control unit 1011 generates information to be allocated to each uplink channel and outputs the information to the transmission unit 107.

The scheduling information interpreting unit 1013 included in the upper layer processing unit 101 interprets the DCI (scheduling information) received via the receiving unit 105 and, based on the result of interpreting the DCI, determines whether the receiving unit 105 and the transmitting unit 107 It generates control information for performing control and outputs it to the control unit 103.

CSI report control section 1015 instructs measurement section 1059 to derive channel state information (RI / PMI / CQI / CRI) related to the CSI reference resource. CSI report control section 1015 instructs transmission section 107 to transmit RI / PMI / CQI / CRI. CSI report control section 1015 sets a setting used by measurement section 1059 when calculating CQI.

Sounding reference signal control section 1017 instructs uplink reference signal generation section 1079 to derive information related to SRS resource configuration. Sounding reference signal control section 1017 instructs transmitting section 107 to transmit an SRS resource. Sounding reference signal control section 1017 sets a setting used when uplink reference signal generation section 1079 generates an SRS. Further, sounding reference signal control section 1017 outputs spatial relation information and / or information of the corresponding CSI reference signal to control section 103. Also, sounding reference signal control section 1017 outputs the spatial domain reception filter input from reception section 105 to transmission section 107.

The control unit 103 generates a control signal for controlling the receiving unit 105 and the transmitting unit 107 based on the control information from the upper layer processing unit 101. The control unit 103 outputs the generated control signal to the receiving unit 105 and the transmitting unit 107 to control the receiving unit 105 and the transmitting unit 107. Further, control section 103 outputs the spatial relation information and / or the information of the corresponding CSI reference signal input from sounding reference signal control section 1017 to receiving section 105 and / or transmitting section 107. Receiving section 105 transmits, to sounding reference signal control section 1017, a spatial domain reception filter used when receiving a downlink signal corresponding to spatial relation information and / or information of a corresponding CSI reference signal input from control section 103. Output.

The radio reception unit 1057 converts the downlink signal received via the transmission / reception antenna 109 into an intermediate frequency (down conversion: {down} covert), removes unnecessary frequency components, and maintains the signal level appropriately. The quadrature demodulation is performed based on the in-phase and quadrature components of the received signal, and the quadrature demodulated analog signal is converted into a digital signal. The radio receiving unit 1057 removes a portion corresponding to a guard interval (Guard Interval: GI) from the converted digital signal, performs fast Fourier transform (Fast Fourier Transform: FFT) on the signal from which the guard interval has been removed, and Extract the signal of the area.

The demultiplexing unit 1055 demultiplexes the extracted signal into a downlink PDCCH, a PDSCH, and a downlink reference signal. Also, the demultiplexing section 1055 compensates for the PDCCH and PUSCH propagation paths based on the propagation path estimation values input from the measurement section 1059. Further, demultiplexing section 1055 outputs the separated downlink reference signal to measurement section 1059.

Here, the terminal device 1 may assume the following for signal separation in the demultiplexing unit 1055.
The time-frequency resources of the NZP-CSI-RS to which the periodic and semi-persistent transmission methods are applied are not used for the PDSCH;
The time-frequency resources of the ZP-CSI-RS to which the periodic and semi-persistent transmission methods are applied are not used for the PDSCH; and the ZP-CSI-RS to which the aperiodic transmission method is applied. Is not used for the PDSCH instructed to be assigned by the DCI instructing the ZP-CSI-RS.

Demodulation section 1053 demodulates the downlink PDCCH and outputs the result to decoding section 1051. Decoding section 1051 attempts to decode the PDCCH and, if decoding is successful, outputs the decoded downlink control information and the RNTI corresponding to the downlink control information to upper layer processing section 101.

The demodulation unit 1053 demodulates the PDSCH with the modulation scheme notified by a downlink grant such as QPSK (Quadrature Phase Shift Keying), 16 QAM (Quadrature Amplitude Modulation), 64 QAM, or 256 QAM, and outputs it to the decoding unit 1051. I do. Decoding section 1051 performs decoding based on the information on the transmission or the original coding rate notified by the downlink control information, and outputs the decoded downlink data (transport block) to upper layer processing section 101.

Measurement section 1059 performs downlink path loss measurement, channel measurement, and / or interference measurement from the downlink reference signal input from demultiplexing section 1055. The measurement unit 1059 outputs the CSI calculated based on the measurement result and the measurement result to the upper layer processing unit 101. Also, measuring section 1059 calculates an estimated value of the downlink propagation path from the downlink reference signal and outputs the estimated value to demultiplexing section 1055.

Transmitting section 107 generates an uplink reference signal according to the control signal input from control section 103, encodes and modulates uplink data (transport block) input from upper layer processing section 101, and generates PUCCH, The PUSCH and the generated uplink reference signal are multiplexed and transmitted to the base station device 3 via the transmission / reception antenna 109. Further, transmitting section 107 outputs the spatial domain reception filter input from sounding reference signal control section 1017 to multiplexing section 1075.

Encoding section 1071 encodes uplink control information and uplink data input from upper layer processing section 101. Modulating section 1073 modulates the coded bits input from coding section 1071 using a modulation method such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM.

The uplink reference signal generation unit 1079 uses a physical cell identifier (physical cell identifier: referred to as PCI, Cell ID, or the like) for identifying the base station device 3, a bandwidth for allocating the uplink reference signal, and an uplink grant. Based on the notified cyclic shift, the value of the parameter for generating the DMRS sequence, and the like, a sequence determined by a predetermined rule (expression) is generated. In addition, the uplink reference signal generation unit outputs the spatial domain transmission filter applied when transmitting the SRS resource to the multiplexing unit 1075.

The multiplexing unit 1075 determines the number of PUSCH layers to be spatially multiplexed based on information used for PUSCH scheduling, and uses MIMO spatial multiplexing (MIMO SM: Multiple Input Multiple Output Spatial Multiplexing) to generate the same PUSCH. A plurality of uplink data to be transmitted are mapped to a plurality of layers, and precoding is performed on the layers.

The multiplexing unit 1075 performs a discrete Fourier transform (Discrete Fourier Transform: DFT) on the PUSCH modulation symbol according to the control signal input from the control unit 103. The multiplexing unit 1075 multiplexes the PUCCH and / or PUSCH signal and the generated uplink reference signal for each transmission antenna port. That is, multiplexing section 1075 arranges the PUCCH and / or PUSCH signal and the generated uplink reference signal in the resource element for each transmission antenna port. Further, multiplexing section 1075 uses the spatial domain reception filter input from transmission section 107 or the spatial domain transmission filter input from uplink reference signal generation section 1079 to perform precoding on the uplink data and the uplink reference signal. (Precoding).

The radio transmitting unit 1077 performs an inverse fast Fourier transform (Inverse Fast Fourier Transform: IFFT) on the multiplexed signal, performs SC-FDM modulation, and adds a guard interval to the SC-FDM modulated SC-FDM symbol. Generating a baseband digital signal, converting the baseband digital signal to an analog signal, generating an in-phase component and a quadrature component of an intermediate frequency from the analog signal, removing extra frequency components for the intermediate frequency band, The signal of the intermediate frequency is converted into a signal of a high frequency (up-conversion: up convert), an extra frequency component is removed, power is amplified, and the amplified signal is output to the transmission / reception antenna 109 and transmitted.

FIG. 8 is a schematic block diagram showing the configuration of the base station device 3 of the present embodiment. As illustrated, the base station device 3 is configured to include an upper layer processing unit 301, a control unit 303, a reception unit 305, a transmission unit 307, and a transmission / reception antenna 309. Further, the upper layer processing unit 301 is configured to include a radio resource control unit 3011, a scheduling unit 3013, a channel state information report control unit 3015, and a sounding reference signal control unit 3017. The receiving unit 305 includes a decoding unit 3051, a demodulating unit 3053, a demultiplexing unit 3055, a wireless receiving unit 3057, and a measuring unit 3059. Also, the transmitting section 307 includes an encoding section 3071, a modulating section 3073, a multiplexing section 3075, a radio transmitting section 3077, and a downlink reference signal generating section 3079.

The upper layer processing unit 301 includes a medium access control (MAC: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: \ RLC) layer, and a radio resource control (Radio). Resource Control: RRC) layer processing. Further, the upper layer processing unit 301 generates control information for controlling the receiving unit 305 and the transmitting unit 307, and outputs the control information to the control unit 303.

The radio resource control unit 3011 included in the upper layer processing unit 301 generates downlink data (transport block), system information, RRC message, MAC @ CE (Control @ Element), etc., arranged in the downlink PDSCH, or The information is acquired from the node and output to the transmission unit 307. The wireless resource control unit 3011 manages various setting information of each terminal device 1.

The scheduling unit 3013 included in the upper layer processing unit 301 determines the frequency and subframe to which a physical channel (PDSCH or PUSCH) is to be allocated, based on the received CSI and the estimated value of the propagation path and the channel quality input from the measurement unit 3059. The transmission coding rate, modulation scheme, transmission power, and the like of the channel (PDSCH or PUSCH) are determined. The scheduling unit 3013 generates control information for controlling the receiving unit 305 and the transmitting unit 307 based on the scheduling result, and outputs the control information to the control unit 303. The scheduling unit 3013 generates information (for example, DCI (format)) used for scheduling the physical channel (PDSCH or PUSCH) based on the scheduling result.

Here, the upper layer processing unit 301 performs the following processing when assigning a physical channel.
No PDSCH is assigned to the time-frequency resource of the NZP-CSI-RS to which the periodic and semi-persistent transmission method is applied,
No PDSCH is allocated to the time-frequency resource of the ZP-CSI-RS to which the periodic and semi-persistent transmission method is applied, and the time of the ZP-CSI-RS to which the aperiodic transmission method is applied. The PDSCH whose allocation has been instructed by the DCI that has indicated the ZP-CSI-RS is not allocated to the frequency resource.

チャネル The channel state information report control unit 3015 included in the upper layer processing unit 301 controls the CSI report of the terminal device 1. The sounding reference signal control unit 3017 transmits the setting used when the terminal device 1 generates the SRS to the terminal device 1 via the transmission unit 307. Further, sounding reference signal control section 3017 provided in upper layer processing section 301 controls SRS transmission of terminal apparatus 1. The sounding reference signal control unit 3017 transmits the setting used when the terminal device 1 generates the SRS to the terminal device 1 via the transmission unit 307.

The control unit 303 generates a control signal for controlling the receiving unit 305 and the transmitting unit 307 based on the control information from the upper layer processing unit 301. The control unit 303 outputs the generated control signal to the receiving unit 305 and the transmitting unit 307, and controls the receiving unit 305 and the transmitting unit 307.

Receiving section 305 separates, demodulates, and decodes a received signal received from terminal apparatus 1 via transmitting / receiving antenna 309 according to the control signal input from control section 303, and outputs the decoded information to upper layer processing section 301. . The wireless receiving unit 3057 converts an uplink signal received via the transmission / reception antenna 309 into an intermediate frequency (down-conversion: {down} covert), removes unnecessary frequency components, and appropriately maintains a signal level. The amplification level is controlled as described above, quadrature demodulation is performed based on the in-phase and quadrature components of the received signal, and the quadrature-demodulated analog signal is converted into a digital signal.

The wireless receiving unit 3057 removes a part corresponding to a guard interval (Guard GI) from the converted digital signal. The wireless receiving unit 3057 performs fast Fourier transform (Fast Fourier Transform: FFT) on the signal from which the guard interval has been removed, extracts a signal in the frequency domain, and outputs the signal to the demultiplexing unit 3055.

The demultiplexing unit 1055 separates the signal input from the radio reception unit 3057 into signals such as PUCCH, PUSCH, and uplink reference signals. This separation is performed based on the radio resource allocation information included in the uplink grant, which is determined in advance by the base station apparatus 3 in the radio resource control unit 3011 and notified to each terminal apparatus 1. Further, the demultiplexing section 3055 compensates for the PUCCH and PUSCH propagation paths based on the propagation path estimation values input from the measurement section 3059. Further, demultiplexing section 3055 outputs the separated uplink reference signal to measurement section 3059.

The demodulation section 3053 performs an inverse discrete Fourier transform (Inverse Discrete Fourier Transform: IDFT) on the PUSCH, obtains a modulation symbol, and applies BPSK (Binary Phase Shift Keying), QPSK, 16QAM, The own device demodulates the received signal using a predetermined modulation method such as 64QAM or 256QAM, or a modulation method notified by the own device to each terminal device 1 in advance by an uplink grant. Demodulation section 3053 uses MIMO SM based on the number of spatially multiplexed sequences notified in advance in the uplink grant to each of terminal devices 1 and information indicating precoding to be performed on the sequences. The modulation symbols of a plurality of uplink data transmitted on PUSCH are separated.

The decoding unit 3051 transmits the demodulated coded bits of the PUCCH and PUSCH to the transmission or transmission of the predetermined information in a predetermined coding scheme or in advance by the own apparatus to the terminal apparatus 1 by an uplink grant. Decoding is performed at the coding rate, and the decoded uplink data and uplink control information are output to the upper layer processing unit 101. When the PUSCH is retransmitted, the decoding unit 3051 performs decoding using the coded bits held in the HARQ buffer input from the upper layer processing unit 301 and the demodulated coded bits. Measuring section 3059 measures an estimated value of the propagation path, channel quality, and the like from the uplink reference signal input from demultiplexing section 3055, and outputs the measured value to demultiplexing section 3055 and upper layer processing section 301.

The transmitting section 307 generates a downlink reference signal according to the control signal input from the control section 303, encodes and modulates downlink control information and downlink data input from the upper layer processing section 301, and performs PDCCH , PDSCH, and the downlink reference signal are multiplexed or transmitted using separate radio resources to the terminal device 1 via the transmission / reception antenna 309.

Encoding section 3071 encodes downlink control information and downlink data input from upper layer processing section 301. The modulation unit 3073 modulates the coded bits input from the coding unit 3071 using a modulation method such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM.

The downlink reference signal generation unit 3079 generates a sequence known by the terminal device 1 as a downlink reference signal, which is obtained by a predetermined rule based on a physical cell identifier (PCI) for identifying the base station device 3 and the like. I do.

The multiplexing unit 3075 maps one or a plurality of downlink data transmitted on one PDSCH to one or a plurality of layers according to the number of spatially multiplexed PDSCH layers, and Precoding is performed on the layer of. The multiplexing unit 3075 multiplexes a downlink physical channel signal and a downlink reference signal for each transmission antenna port. The multiplexing unit 3075 arranges a downlink physical channel signal and a downlink reference signal in a resource element for each transmission antenna port.

The radio transmission unit 3077 performs an inverse fast Fourier transform (Inverse Fast Fourier Transform: IFFT) on the multiplexed modulation symbols and the like, performs OFDM modulation, adds a guard interval to the OFDM symbol that has been OFDM modulated, , Convert the baseband digital signal into an analog signal, generate an in-phase component and a quadrature component of the intermediate frequency from the analog signal, remove extra frequency components for the intermediate frequency band, and remove the intermediate frequency signal. Is converted into a high-frequency signal (up-conversion: 余分 up convert), an extra frequency component is removed, power is amplified, and the signal is output to the transmission / reception antenna 309 and transmitted.

(1) More specifically, the terminal device 1 in the first aspect of the present invention sets the first time-frequency resource of one or more zero power channel state information reference signals by an upper layer, And a receiving unit for receiving downlink control information including information specifying a first non-zero power channel state information calculation reference signal arranged in the time-frequency resource, wherein the second time-frequency resource is the first time-frequency resource. The spatial domain transmission filter used for the previous sounding reference signal is applied and the sounding reference signal is transmitted based on whether the time-frequency resource is limited to a part or the entirety of the time-frequency resource.

(2) The base station apparatus 3 according to the second aspect of the present invention sets the first time-frequency resource of one or a plurality of zero power channel state information reference signals by an upper layer, and sets the first time-frequency resource in the second time-frequency resource. A transmitting unit that transmits downlink control information including information designating a first non-zero power channel state information calculation reference signal to be arranged, wherein the second time-frequency resource is one of the first time-frequency resources. The sounding reference signal transmitted by applying the spatial domain transmission filter used for the previous sounding reference signal is received based on whether the sounding reference signal is limited to a part or the whole.

(3) The communication method according to the third aspect of the present invention is a communication method for a terminal device, wherein a first time-frequency resource of one or a plurality of zero power channel state information reference signals is set by an upper layer, Receiving downlink control information including information designating a first non-zero power channel state information calculation reference signal arranged in a second time-frequency resource, wherein the second time-frequency resource is in the first time-frequency resource; The spatial domain transmission filter used for the previous sounding reference signal is applied, and the sounding reference signal is transmitted, based on whether the sounding reference signal is limited to part or all of the frequency resources.

(4) The communication method according to the fourth aspect of the present invention is a communication method for a base station apparatus, wherein a first time-frequency resource of one or a plurality of zero power channel state information reference signals is set by an upper layer. Transmitting downlink control information including information specifying a first non-zero power channel state information calculation reference signal to be allocated to a second time-frequency resource, wherein the second time-frequency resource is the first time-frequency resource. A sounding reference signal transmitted by applying a spatial domain transmission filter used for a previous sounding reference signal is received based on whether the sounding reference signal is limited to part or all of the time-frequency resource.

(5) The integrated circuit according to the fifth aspect of the present invention is an integrated circuit mounted on a terminal device, wherein the first time-frequency resource of one or a plurality of zero power channel state information reference signals is transmitted by an upper layer. Receiving means for receiving downlink control information that includes information specifying a first non-zero power channel state information calculation reference signal that is set and arranged in a second time-frequency resource; The spatial domain transmission filter used for the previous sounding reference signal is applied based on whether the time frequency resource is limited to a part or the entirety of the first time frequency resource, and the sounding reference signal is transmitted.

(6) The integrated circuit according to the sixth aspect of the present invention is an integrated circuit mounted on a base station apparatus, wherein the first time-frequency resource of one or a plurality of zero power channel state information reference signals is assigned to an upper layer. Transmitting means for transmitting downlink control information including information specifying a first non-zero power channel state information calculation reference signal arranged in a second time-frequency resource. Receiving the sounding reference signal transmitted by applying the spatial domain transmission filter used for the previous sounding reference signal based on whether the time-frequency resource is limited to part or all of the first time-frequency resource I do.

The program that operates on the device according to one embodiment of the present invention may be a program that controls a Central Processing Unit (CPU) and the like to cause a computer to function so as to realize the functions of the embodiment according to the present invention. The program or information handled by the program is temporarily stored in a volatile memory such as a Random Access Memory (RAM), a non-volatile memory such as a flash memory, a Hard Disk Drive (HDD), or another storage device system.

Note that a program for realizing the functions of the embodiment according to the present invention may be recorded on a computer-readable recording medium. The program may be realized by causing a computer system to read and execute the program recorded on the recording medium. Here, the “computer system” is a computer system built in the device, and includes an operating system and hardware such as peripheral devices. In addition, the “computer-readable recording medium” is a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a medium that dynamically holds a program for a short time, or another computer-readable recording medium. Is also good.

Each functional block or various features of the device used in the above-described embodiment may be implemented or executed by an electric circuit, for example, an integrated circuit or a plurality of integrated circuits. An electrical circuit designed to perform the functions described herein may be a general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA), or other Logic devices, discrete gate or transistor logic, discrete hardware components, or a combination thereof. A general purpose processor may be a microprocessor, or may be a conventional processor, controller, microcontroller, or state machine. The above-described electric circuit may be configured by a digital circuit or an analog circuit. In addition, in the case where a technology for forming an integrated circuit that substitutes for a current integrated circuit appears due to the progress of semiconductor technology, one or more aspects of the present invention can use a new integrated circuit based on the technology.

In the embodiment according to the present invention, an example in which the present invention is applied to a communication system including a base station device and a terminal device has been described. However, in a system in which terminals communicate with each other, such as D2D (Device @ to \ Device). Is also applicable.

Note that one embodiment of the present invention is not limited to the above embodiment. In the embodiment, an example of the device is described. However, one embodiment of the present invention is not limited thereto, and a stationary or non-movable electronic device installed indoors and outdoors, for example, an AV device, It can be applied to terminal devices or communication devices such as kitchen appliances, cleaning / washing appliances, air conditioning appliances, office appliances, vending machines, and other household appliances.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the embodiments, and may include design changes within the scope of the present invention. Further, the present invention can be variously modified within the scope shown in the claims, and the technical scope of the present invention includes embodiments obtained by appropriately combining technical means disclosed in different embodiments. It is. The elements described in each of the above embodiments also include a configuration in which elements having the same effects are replaced with each other.

Claims

A terminal device,
A first time-frequency resource of one or more zero power channel state information reference signals is set by an upper layer,
A receiving unit that receives downlink control information including information designating a first non-zero power channel state information calculation reference signal arranged in a second time-frequency resource;
Based on whether the second time-frequency resource is limited to some or all of the first time-frequency resource,
Apply the spatial domain transmission filter used for the previous sounding reference signal and transmit the sounding reference signal,
Terminal device.
A base station device,
Set the first time-frequency resource of one or more zero power channel state information reference signal by the upper layer,
A transmission unit configured to transmit downlink control information including information specifying a first non-zero power channel state information calculation reference signal to be allocated to the second time-frequency resource;
Based on whether the second time-frequency resource is limited to some or all of the first time-frequency resource,
Receive the sounding reference signal transmitted by applying the spatial domain transmission filter used for the previous sounding reference signal,
Base station device.
A communication method of a terminal device,
A first time-frequency resource of one or more zero power channel state information reference signals is set by an upper layer,
Receiving downlink control information including information specifying a first non-zero power channel state information calculation reference signal arranged in a second time-frequency resource;
Based on whether the second time-frequency resource is limited to some or all of the first time-frequency resource,
Apply the spatial domain transmission filter used for the previous sounding reference signal and transmit the sounding reference signal,
Communication method.
A communication method of a base station device,
Set the first time-frequency resource of one or more zero power channel state information reference signal by the upper layer,
Transmitting downlink control information including information specifying a first non-zero power channel state information calculation reference signal arranged in a second time-frequency resource;
Based on whether the second time-frequency resource is limited to some or all of the first time-frequency resource,
Receive the sounding reference signal transmitted by applying the spatial domain transmission filter used for the previous sounding reference signal,
Communication method.
An integrated circuit mounted on the terminal device,
A first time-frequency resource of one or more zero power channel state information reference signals is set by an upper layer,
Receiving means for receiving downlink control information including information designating a first non-zero power channel state information calculation reference signal arranged in a second time-frequency resource,
Based on whether the second time-frequency resource is limited to some or all of the first time-frequency resource,
Apply the spatial domain transmission filter used for the previous sounding reference signal and transmit the sounding reference signal,
Integrated circuit.
An integrated circuit mounted on the base station device,
A first time-frequency resource of one or more zero power channel state information reference signals is set by an upper layer,
Transmitting means for transmitting downlink control information including information specifying a first non-zero power channel state information calculation reference signal arranged in the second time-frequency resource,
Based on whether the second time-frequency resource is limited to some or all of the first time-frequency resource,
Receive the sounding reference signal transmitted by applying the spatial domain transmission filter used for the previous sounding reference signal,
Integrated circuit.