JP2020109883A - Terminal device, base station device, communication method, and integrated circuit - Google Patents

Abstract

To provide a terminal device, a base station device, and an integrated circuit that have a method for giving notice of a physical parameter of a radio access system so that the terminal device and the base station device can efficiently communicate with each other.SOLUTION: A terminal device receives first information indicating a combination of any of a subcarrier interval, the number of slots, the number of OFDM symbols, and a transmission time interval or one or more candidates of the combination, and identifies a combination of at least a sub-carrier interval (SCS) and a transmission time interval (TTI) set to a physical channel or one or more candidates of the combination based at least on the first information. A base station device transmits the first information and transmits the physical channel by using any of the plurality of candidates of the combination.SELECTED DRAWING: Figure 7

Description

The present invention relates to a terminal device, a base station device, a communication method, and an integrated circuit.

A wireless access method and a wireless network of cellular mobile communication (hereinafter referred to as “Long Term Evolution (LTE: registered trademark)” or “Evolved Universal Terrestrial Radio Access (EUTRA)”) are third generation partnership projects (3rd Generation).
Partnership Project: 3GPP). Further, in 3GPP, as a wireless access method and a wireless network technology for a fifth-generation cellular system, LTE-Advanced Pro, which is an extension technology of LTE, and a new wireless access technology, NR (New Radio technology), are studied. Standards are being developed (Non-Patent Document 1).

In the fifth-generation cellular system, eMBB (enhanced Mobile BroadBand) that realizes high-speed and large-capacity transmission, URLLC (Ultra-Reliable and Low Latency Communication) that realizes low-delay and high-reliability communication, and IoT (Internet of Things). Three of the machine-machine communication (mMTC), which is connected to a large number of machine type devices, is required as a scenario for service.

Further, in NR, it is considered to communicate using a plurality of different physical parameters (for example, subcarrier intervals) (Non-Patent Document 2), and the terminal device determines which of the plurality of different physical parameters is used. It is necessary to specify whether or not to communicate with the base station device by using.

RP-161214, NTT DOCOMO, "Revision of SI: Study on New Radio Access Technology", June 2016 3GPP R1-166878 http://www. 3 gpp. org/ftp/tsg_ran/WG1_RL1/TSGR1_86/Docs/R1-1668878. zip 3GPP R2-168531 http://www. 3 gpp. org/ftp/tsg_ran/WG2_RL2/TSGR2_96/Docs/R2-168831. zip

In NR, it is considered that the base station device and the terminal device communicate with each other using a plurality of physical parameters (numerology) based on the capability of the terminal and the physical parameter supported by the cell (Non-Patent Document 3). However, a method of notifying and applying a necessary parameter has not been studied, and there is a problem that communication between the base station device and the terminal device cannot be efficiently performed.

One embodiment of the present invention has been made in view of the above circumstances, and is used for a terminal device that can efficiently perform communication with a base station device, a base station device that communicates with the terminal device, and the terminal device. Another object is to provide a communication method, a communication method used in the base station device, an integrated circuit mounted in the terminal device, and an integrated circuit mounted in the base station device.

(1) In order to achieve the above object, one aspect of the present invention takes the following means. That is, the first aspect of the present invention is a terminal device, and first information indicating one or a plurality of candidates of a combination of subcarrier intervals, the number of slots, the number of OFDM symbols, and a transmission time interval. And a combination of at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a physical channel based on at least the first information, or one of the combinations or And a control unit that specifies a plurality of candidates.

(2) A second aspect of the present invention is a base station apparatus, which is a first station that indicates one or a plurality of candidates for a combination of subcarrier intervals, the number of slots, the number of OFDM symbols, and a transmission time interval. And a transmission unit configured to transmit the first information and set at least a subcarrier interval (SCS) and a transmission time interval (TTI) for a physical channel based on at least the first information. ), or one or a plurality of candidates of the combination, for transmitting a physical channel.

(3) A third aspect of the present invention is a communication method applied to a terminal device, which comprises one or a plurality of combinations of subcarrier intervals, the number of slots, the number of OFDM symbols, and transmission time intervals. Receiving first information indicating a candidate, and combining at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a physical channel based on at least the first information, Or identifying one or more candidates for the combination.

(4) A fourth aspect of the present invention is an integrated circuit mounted in a terminal device, wherein one or a plurality of combinations of subcarrier intervals, the number of slots, the number of OFDM symbols, and transmission time intervals, or a combination thereof. A function of receiving first information indicating a candidate, and a combination of at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a physical channel based on at least the first information; Alternatively, the terminal device is caused to exhibit the function of specifying one or more candidates of the combination.

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

It is a conceptual diagram of the radio|wireless communications system of this embodiment. It is a block diagram which shows an example of schematic structure of the terminal device which concerns on embodiment of this invention. It is a block diagram which shows an example of schematic structure of the base station apparatus which concerns on embodiment of this invention. It is a figure which shows an example of schematic structure of the downlink slot which concerns on embodiment of this invention. FIG. 5 is a diagram showing a relationship in the time domain of subframes, slots, and minislots according to the embodiment of the present invention. It is a figure which shows an example of the slot or sub-frame which concerns on embodiment of this invention. It is a figure which shows an example of the RRC connection reset procedure which concerns on embodiment of this invention. It is a figure which shows an example of the RRC connection reset message which concerns on embodiment of this invention. It is a figure which shows an example of the element contained in the RRC connection reset message which concerns on embodiment of this invention. It is a figure which shows an example of the element contained in the RRC connection reset message which concerns on embodiment of this invention. It is a figure which shows an example of the element contained in the RRC connection reset message which concerns on embodiment of this invention. It is a figure which shows an example of the element contained in the RRC connection reset message which concerns on embodiment of this invention. It is a figure which shows an example of the RRC connection reset procedure which concerns on embodiment of this invention. It is a figure which shows an example of the element contained in the RRC connection reset message which concerns on embodiment of this invention. It is a figure which shows the information regarding numerology and the example of a transmission time interval (TTI) setting which concern on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described.

A wireless communication system and a wireless network of this embodiment will be described.

LTE (and LTE-A Pro) and NR may be defined as different RATs (Radio Access Technology). NR may be defined as a technology included in LTE. LTE may be defined as a technology included in NR. This embodiment may be applied to NR, LTE and other RATs. In the following description, LTE-related terms are used for description, but they may be applied to other technologies that use other terms.

FIG. 1 is a conceptual diagram of the wireless communication system of this embodiment. In FIG. 1, the wireless communication system includes a terminal device 2 and a base station device 3. Further, the base station device 3 may include one or a plurality of transmission/reception points 4 (transmission reception points: TRP). The base station device 3 may serve the terminal device 2 with the communicable range (communication area) controlled by the base station device 3 as one or a plurality of cells. In addition, the base station device 3 may serve the terminal device 2 with the communicable range (communication area) controlled by the one or more transmission/reception points 4 as one or more cells. In addition, one cell may be divided into a plurality of partial areas (also referred to as a beamed area or a beamed cell), and the terminal device 2 may be served in each of the partial areas. Here, the sub-regions may be identified based on a beam index used in beamforming, an index of waji collocation, or an index of precoding.

The communication area covered by the base station device 3 may have a different size and a different shape for each frequency. Moreover, the area to be covered may be different for each frequency. A wireless network in which cells having different types of base station devices 3 and different cell radius sizes are mixed in the same frequency or different frequencies to form one communication system is referred to as a heterogeneous network.

A wireless communication link from the base station device 3 to the terminal device 2 is called a downlink. A wireless communication link from the terminal device 2 to the base station device 3 is called an uplink. A direct wireless communication link from the terminal device 2 to another terminal device 2 is called a side link.

In FIG. 1, in the wireless communication between the terminal device 2 and the base station device 3 and/or the wireless communication between the terminal device 2 and another terminal device 2, a cyclic prefix (CP: Cyclic) is used.
Orthogonal Frequency Division Multiplexing (OFDM) including Prefix), Single-Carrier Frequency Diversity-Frequency-Sequence OFDM (D-FDM), and Discrete Fourier Transform OFDM (Sequential-Frequency Multiplexing). OFDM), multi-carrier code division multiplexing (MC-CDM: Multi-Carrier Code Division Multiplexing) may be used.

Further, in FIG. 1, in the wireless communication between the terminal device 2 and the base station device 3 and/or the wireless communication between the terminal device 2 and another terminal device 2, a universal filter multi-carrier (UFMC: Universal-Filtered Multi-) is used. Carrier, filter OFDM (F-OFDM: Filtered OFDM), window-multiplied OFDM (Windowed OFDM), and filter bank multi-carrier (FBMC: Filter-Bank Multi-Carrier) may be used.

In the present embodiment, OFDM is used as the transmission method for OFDM symbols, but the present invention also includes the case of using the other transmission methods described above.

Also, in FIG. 1, CP is not used in the wireless communication between the terminal device 2 and the base station device 3 and/or the wireless communication between the terminal device 2 and another terminal device 2, or zero padding is used instead of the CP. The above-described transmission method may be used. Also, CP and zero padding may be added to both the front and the rear.

The terminal device 2 operates by regarding the inside of the cell as a communication area. When the terminal device 2 is in a non-wireless connection (idle state, also referred to as RRC_IDLE state), the terminal device 2 may move to another appropriate cell by a cell reselection procedure. When the terminal device 2 is wirelessly connected (connected state, also referred to as RRC_CONNECTED state), it may move to another cell by a handover procedure. An appropriate cell is generally a cell in which it is determined that access to the terminal device 2 is not prohibited based on the information indicated by the base station device 3, and the downlink reception quality is predetermined. Indicates a cell that meets the conditions. Further, the terminal device 2 may move to another appropriate cell by the cell reselection procedure in the inactive state (also referred to as the inactive state). The terminal device 2 may move to another cell by a handover procedure in the inactive state.

When the terminal device 2 can communicate with a certain base station device 3, among the cells of the base station device 3, a cell set to be used for communication with the terminal device 2 is a serving cell (serving cell). ), other cells that are not used for communication may be referred to as neighbor cells. Further, some or all of the system information required in the serving cell may be reported or notified to the terminal device 2 in another cell.

In the present embodiment, one or more serving cells are set for the terminal device 2. When multiple serving cells are configured for the terminal device 2, the configured multiple serving cells may include one primary cell and one or more secondary cells. The primary cell may be a serving cell for which an initial connection establishment procedure has been performed, a serving cell for initiating a connection re-establishment procedure, or a cell designated as a primary cell in a handover procedure. One or more secondary cells may be set at the time when the RRC (Radio Resource Control) connection is established or after the RRC connection is established. In addition, a cell group (also referred to as a master cell group (MCG)) configured by one or more serving cells including a primary cell (PCell) and a primary cell is not included, and at least a random access procedure can be performed and is inactive. Even if one or a plurality of cell groups (also referred to as a secondary cell group (SCG)) configured by one or a plurality of serving cells including a primary secondary cell (PSCell) that does not enter the state is set for the terminal device 2. Good.

The wireless communication system of this embodiment may be applied with TDD (Time Division Duplex) and/or FDD (Frequency Division Duplex). The TDD (Time Division Duplex) method or the FDD (Frequency Division Duplex) method may be applied to all of the plurality of cells. Also, cells to which the TDD scheme is applied and cells to which the FDD scheme is applied may be aggregated.

In the downlink, a carrier corresponding to a serving cell is called a downlink component carrier (or downlink carrier). In the uplink, the carrier corresponding to the serving cell is called an uplink component carrier (or uplink carrier). In the side link, the carrier corresponding to the serving cell is called a side link component carrier (or side link carrier). The downlink component carrier, the uplink component carrier, and/or the side link component carrier are collectively referred to as a component carrier (or carrier).

Physical channels and physical signals of this embodiment will be described.

In FIG. 1, the following downlink physical channels are used in downlink radio communication between the terminal device 2 and the base station device 3. The downlink physical channel is used to transmit the information output from the upper layer.
・NR-PBCH (New Radio Physical Broadcast Channel)
NR-PDCCH (New Radio Physical Downlink Control Channel)
NR-PDSCH (New Radio Physical Downlink Shared Channel)
The NR-PBCH is important system information (essential) required by the terminal device 2.
It is used for the base station device 3 to notify an important information block (MIB: Master Information Block, EIB: Essential Information Block) including information. Here, one or more important information blocks may be sent as an important information message. For example, the important information block may include information indicating a part or all of a frame number (SFN: System Frame Number) (for example, information about a position in a superframe composed of a plurality of frames). For example, a radio frame (10 ms) is composed of 10 1 ms subframes, and the radio frame is identified by a frame number. The frame number returns to 0 at 1024 (Wrap around). In addition, when different important information blocks are transmitted for each area in the cell, information that can identify the area (for example, identifier information of base station transmission beams forming the area) may be included. Here, the base station transmission beam identifier information may be indicated using an index of the base station transmission beam (precoding). Also, when different important information blocks (important information messages) are transmitted for each area in a cell, the time position in the frame (for example, the subframe number including the important information block (important information message)) is identified. Information that can be included may be included. That is, information for determining each subframe number in which each transmission of the important information block (important information message) using different base station transmission beam indexes may be included. For example, the important information may include information necessary for connection to the cell and mobility. Also, the important information message may be a part of the system information message. Further, part or all of the important information message may be referred to as minimum system information (Minimum SI). When all the valid minimum system information in a certain cell cannot be acquired, the terminal device 2 may regard that cell as a barred cell whose access is prohibited. Further, only a part of the minimum system information may be broadcast on the PBCH, and the remaining minimum system information may be transmitted on the NR-PSCH described later.

The NR-PDCCH is used to transmit downlink control information (DCI) in downlink radio communication (radio communication from the base station device 3 to the terminal device 2). Here, one or more 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, as the DCI, a DCI including information indicating the timing of transmitting HARQ-ACK for the scheduled NR-PDSCH (eg, the number of symbols from the last symbol included in the NR-PDSCH to the HARQ-ACK transmission) is defined. Good.

For example, as the DCI, a DCI used for scheduling one downlink radio communication NR-PDSCH (transmission of one downlink transport block) in one cell may be defined.

For example, as the DCI, a DCI used for scheduling one uplink radio communication NR-PUSCH (transmission of one uplink transport block) in one cell may be defined.

For example, DCI indicates a subcarrier interval (SCS) of one downlink radio communication NR-PDSCH in one cell and/or a unit of time (transmission time interval, TTI: Transmission Time Interval) used for scheduling. Information may be included.

For example, DCI may include information for indicating a subcarrier interval (SCS) and/or a transmission time interval (TTI) of one uplink radio communication NR-PDSCH in one cell.

Here, the DCI includes information about scheduling of NR-PDSCH or NR-PUSCH. Here, the DCI for the downlink is also referred to as a downlink grant or a downlink assignment. Here, the DCI for the uplink is also referred to as an uplink grant or an uplink assignment.

The NR-PDSCH is used for transmitting downlink data (DL-SCH: Downlink Shared Channel) from a mediation access (MAC: Medium Access Control). In addition, system information (SI: System Inf)
information transmission) and random access response (RAR: Random Access Response).

Here, the base station device 3 and the terminal device 2 exchange (transmit/receive) signals in an upper layer (higher layer). For example, in the radio resource control (RRC: Radio Resource Control) layer, the base station apparatus 3 and the terminal apparatus 2 have RRC signaling (RRC message: Radio Resource Control message, RRC information: Radio Resource C).
(also referred to as "control information"). In addition, the base station device 3 and the terminal device 2 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 is also referred to as a higher layer signal (higher layer signaling). The upper layer here means an upper layer viewed from the physical layer, and thus may include one or more of a MAC layer, an RRC layer, an RLC layer, a PDCP layer, a NAS layer, and the like. For example, in the processing of the MAC layer, the upper layer may include one or more of the RRC layer, the RLC layer, the PDCP layer, the NAS layer, and the like.

The NR-PDSCH may be used for transmitting RRC signaling and MAC control elements. Here, the RRC signaling transmitted from the base station device 3 may be common signaling to the plurality of terminal devices 2 in the cell. Further, the RRC signaling transmitted from the base station device 3 may be dedicated signaling (also referred to as “dedicated signaling”) for a certain terminal device 2. That is, the terminal device specific (UE-specific) information may be transmitted to a certain terminal device 2 using dedicated signaling.

The NR-PRACH may be used to transmit the random access preamble. The NR-PRACH includes initial connection establishment procedure, handover procedure, connection re-establishment procedure, synchronization (timing adjustment) for uplink transmission, and NR-PUSCH (UL-SCH) resource. It may be used to indicate a request.

In FIG. 1, the following downlink physical signals are used in downlink radio communication. Here, the downlink physical signal is not used for transmitting the information output from the upper layer, but is used by the physical layer.
・Synchronization signal (SS)
Reference signal (Reference Signal: RS)
The synchronization signal is used by the terminal device 2 to synchronize the downlink frequency domain and time domain. The synchronization signal may include a primary synchronization signal (PSS: Primary Synchronization Signal) and a secondary synchronization signal (Second Synchronization Signal). The synchronization signal may be used by the terminal device 2 to identify a cell identifier (cell ID: Cell Identifier, also referred to as PCI: Physical Cell Identifier). Further, the synchronization signal may be used for selection/identification/determination of a base station transmission beam used by the base station apparatus 3 and/or a terminal reception beam used by the terminal apparatus 2 in downlink beamforming. That is, the synchronization signal may be used by the terminal device 2 to select/identify/determine the index of the base station transmission beam applied to the downlink signal by the base station device 3. The synchronization signal, the primary synchronization signal, and the secondary synchronization signal used in NR may be referred to as NR-SS, NR-PSS, and NR-SSS, respectively. The synchronization signal may also be used to measure cell quality. For example, the reception power (SSRP) and reception quality (SSRQ) of the synchronization signal may be used for the measurement. Also, the synchronization signal may be used to perform channel correction of some downlink physical channels.

Downlink reference signals (hereinafter, also simply referred to as reference signals in the present embodiment) may be classified into a plurality of reference signals based on applications and the like. For example, the reference signal may be one or more of the following reference signals.
・DMRS (Demodulation Reference Signal)
CSI-RS (Channel State Information Reference Signal)
・PTRS (Phase Tracking Reference Signal)
・MRS (Mobility Reference Signal)
The DMRS may be used for propagation path compensation when demodulating the received modulated signal. The DMRS may collectively refer to DMRSs for NR-PDSCH demodulation, NR-PDCCH demodulation, and/or NR-PBCH demodulation, or may be defined individually.

CSI-RS may be used for channel condition measurement and beam management. The PTRS may be used to track the phase as the terminal moves. The MRS may be used to measure reception quality from a plurality of base station devices for handover.

A reference signal for compensating for phase noise may be defined as the reference signal.

Further, the reference signal may be used for radio resource measurement (RRM: Radio Resource Measurement). Further, the reference signal may be used for beam management.

The 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 2 in the case of uplink) and a receiving device (terminal device 2 in the case of downlink). , And in the case of the uplink, it is the base station apparatus 3, and the procedure of the base station apparatus 3 and/or the terminal apparatus 2 for adjusting the directivity of the analog and/or digital beams in the uplink to obtain the beam gain may be used.

The following procedure may be included as a procedure for configuring, setting, or establishing a beam pair link.
・Beam selection
・Beam refinement
・Beam recovery
For example, the beam selection may be a procedure for selecting a beam in communication between the base station device 3 and the terminal device 2. Further, the beam improvement may be a procedure of selecting a beam having a higher gain or changing the beam between the base station apparatus 3 and the terminal apparatus 2 optimally by moving the terminal apparatus 2. The beam recovery may be a procedure of reselecting a beam when the quality of the communication link is deteriorated due to a blockage generated by a blocking object or a person passing in the communication between the base station device 3 and the terminal device 2.

Beam management may include beam selection and beam refinement. Beam recovery may include the following procedures.
-Detection of beam failure-Detection of new beam-Transmission of beam recovery request-Monitoring of response to beam recovery request For example, when selecting a transmission beam of the base station device 3 in the terminal device 2, CSI-RS or A synchronization signal (eg, SSS) in the synchronization signal block may be used, or a pseudo co-location (QCL) assumption may be used.

Two antenna ports are said to be QCL if the long term property of the channel on which one symbol on one antenna port is carried can be inferred from the channel on which one symbol on the other antenna port is carried. .. The long-term characteristics of the channel include one or more of delay spread, Doppler spread, Doppler shift, average gain, and average delay. For example, when 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. Therefore, the QCL extended to the space may be newly defined. For example, as a long-term characteristic of a channel in the QCL assumption of space, the arrival angle (AoA (Angle of Arrival), ZoA (Zenith angle of Arrival), etc.) and/or the angular spread (Angle) in a wireless link or a channel are used. Spread, for example, ASA (Angle Spread of Arrival) and ZSA (Zenith angle Spread of Arrival), delivery angle (AoD, ZoD, etc.) and its angular spread (Angle Spread an Angle Zeple, Angular Spread of Arrival, etc.).
Spread of Departure), spatial correlation (Spatial Corr)
elation).

By this method, as the beam management, the operations of the base station device 3 and the terminal device 2 equivalent to the beam management may be defined by the spatial QCL assumption and the radio resource (time and/or frequency).

However, at least some of the plurality of reference signals may have the function of other reference signals.

In addition, at least one of the plurality of reference signals or another reference signal is a cell-specific reference signal (CRS) individually set for the cell, the base station device 3, or the transmission/reception point 4 Is defined as a beam-specific reference signal (BRS) for each transmission beam and/or a terminal-specific reference signal (UE-specific reference signal; URS) that is individually set for the terminal device 2. May be done.

Further, at least one of the reference signals may be used for fine synchronization (Fine synchronization) to the extent that numerology such as radio parameters and subcarrier intervals, window synchronization of FFT, and the like can be performed.

Further, at least one of the reference signals may be used for radio resource measurement (RRM: Radio Resource Measurement). Also, at least one of the reference signals may be used for beam management. Hereinafter, the radio resource measurement is also simply referred to as measurement. A beam may also be defined as a transmit or receive filter setting (Filter Configuration).

Also, at least one of the reference signals may include a synchronization signal.

In FIG. 1, the following uplink physical channels are used in the uplink radio communication between the terminal device 2 and the base station device 3 (radio communication from the terminal device 2 to the base station device 3). The uplink physical channel is used to transmit the information output from the upper layer.
NR-PUCCH (New Radio Physical Uplink Control Channel)
・NR-PUSCH (New Radio Physical Uplink Shared Channel)
・NR-PRACH (New Radio Physical Random Access Channel)
NR-PUCCH is used to transmit uplink control information (Uplink Control Information: UCI). 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 NR-PUSCH is used for transmission of uplink data (UL-SCH: Uplink Shared Channel) from a mediation access (MAC: Medium Access Control). It may also be used to send HARQ-ACK and/or CSI with the uplink data. 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.

NR-PUSCH may be used to transmit RRC signaling and MAC control elements. Here, the NR-PUSCH may be placed in the uplink and used for transmission of the UE capability (UE Capability).

In addition, the same designation (for example, NR-PCCH) and the same channel definition may be used for NR-PDCCH and NR-PUCCH. The same designation (for example, NR-PSCH) and the same channel definition may be used for NR-PDSCH and NR-PUSCH.

BCH, UL-SCH and DL-SCH are transport channels. A channel used in the medium access control (MAC) layer is called a transport channel. The unit of the transport channel used in the MAC layer is also called a transport block (TB) or a MAC PDU (Protocol Data Unit). The transport block is a unit of data delivered by the MAC layer to the physical layer. In the physical layer, transport blocks are mapped into codewords, and an encoding process is performed for each codeword.

The wireless protocol structure of this embodiment will be described.

In the present embodiment, a protocol stack handling user data of the terminal device 2 and the base station device 3 is a user plane (UP (User-plane, U-Plane)) protocol stack, and a protocol stack handling control data is a control plane (CP( Control-plane, C-Plane)) protocol stack.

A physical layer (PHY layer) provides a transmission service to an upper layer by using a physical channel (Physical Channel). The PHY layer is connected to an upper medium access control layer (MAC layer) by a transport channel. Data moves between the MAC layer, the PHY layer, and the layer via the transport channel. Data transmission/reception is performed via a physical channel between the PHY layers of the terminal device 2 and the base station device 3.

The MAC layer maps various logical channels to various transport channels. The MAC layer is connected to an upper radio link control layer (Radio Link Control layer: RLC layer) by a logical channel. The logical channel is roughly classified according to the type of information to be transmitted, and is divided into a control channel for transmitting control information and a traffic channel for transmitting user information. The MAC layer has a function of controlling the PHY layer for performing intermittent transmission (DRX/DTX), a function of executing a random access procedure, a function of notifying transmission power information, a function of HARQ control, and the like.

The RLC layer divides the data received from the upper layer and adjusts the data size so that the lower layer can appropriately transmit the data. The RLC layer also has a function of guaranteeing QoS (Quality of Service) required by each data. That is, the RLC layer has functions such as data retransmission control.

The packet data convergence protocol layer (PDCP layer) has a header compression function of compressing unnecessary control information in order to efficiently transmit an IP packet which is user data in a wireless section. The PDCP layer also has a data encryption function.

Further, the control plane protocol stack includes a radio resource control layer (Radio Resource Control layer: RRC layer). The RRC layer sets and resets a radio bearer (RB) and controls a logical channel, a transport channel, and a physical channel. The RB may be divided into a Signaling Radio Bearer (SRB) and a Data Radio Bearer (DRB), and the SRB may be used as a route for transmitting an RRC message that is control information. Good. The DRB may be used as a route for transmitting user data. Each RB may be set between the RRC layers of the base station device 3 and the terminal device 2.

The PHY layer corresponds to the physical layer of the first layer in the layered structure of the generally known Open Systems Interconnection (OSI) model, and the MAC layer, the RLC layer and the PDCP layer are OSI layers. The RRC layer corresponds to the data link layer which is the second layer of the model, and the RRC layer corresponds to the network layer which is the third layer of the OSI model.

The above-mentioned function classification of the MAC layer, the RLC layer, and the PDCP layer is an example, and some or all of the functions may not be mounted. Further, some or all of the functions of each layer may be included in another layer. For example, as seen from the physical layer, the control element of the MAC layer and the RRC signaling are higher layer signals. For example, from the perspective of the MAC layer, RRC signaling is a higher layer signal. Seen from the RRC layer, the MAC layer and the physical layer are lower layers. Seen from the RRC layer, for example, the NAS layer is also referred to as an upper layer (Upper Layer).

Further, the signaling protocol used between the network and the terminal device 2 is divided into an access layer (Access Stratum: AS) protocol and a non-access layer (Non-Access Stratum: NAS) protocol. For example, the protocol below the RRC layer is an access layer protocol used between the terminal device 2 and the base station device 3. Further, protocols such as connection management (CM) and mobility management (MM) of the terminal device 2 are non-access layer protocols and are used between the terminal device 2 and the core network (CN). For example, communication using a non-access layer protocol is transparently performed between the terminal device 2 and a mobile management entity (MME) via the base station device 3.

The subframe will be described below. Although referred to as a subframe in this embodiment, it may be referred to as a resource unit, a radio frame, a time section, a time interval, or the like. In addition, one or a plurality of subframes may form one radio frame.

FIG. 4 is a diagram showing an example of a schematic configuration of a downlink slot according to the embodiment of the present invention. Each radio frame is 10 ms long. Each radio frame is composed of 10 subframes and X slots. That is, the length of one subframe is 1 ms. The time length of each slot is defined by the subcarrier interval. For example, when the subcarrier interval of the OFDM symbol is 15 kHz and NCP (Normal Cyclic Prefix) is used, 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. FIG. 4 shows the case where X=7 as an example. It should be noted that the same can be extended when X=14. In addition, the uplink slot is defined similarly, and the downlink slot and the uplink slot may be defined separately.

The signal or physical channel transmitted in each of the slots may be represented by a resource grid. The resource grid is defined by multiple subcarriers and multiple OFDM symbols. The number of subcarriers forming one slot depends on the downlink and uplink bandwidths of the cell. 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 block is used to represent mapping of resource elements of a certain physical downlink channel (PDSCH or the like) or uplink channel (PUSCH or the like). As the resource block, a virtual resource block and a physical resource block are defined. A physical uplink channel is first mapped to a virtual resource block. The virtual resource block is then mapped to the physical resource block. When the number of OFDM symbols included in a slot is X=7 and NCP is used, one physical resource block is defined by 7 consecutive OFDM symbols in the time domain and 12 consecutive subcarriers in the frequency domain. It That is, one physical resource block is composed of (7×12) resource elements. In the case of ECP (Extended CP), one physical resource block is defined by, for example, 6 consecutive OFDM symbols in the time domain and 12 consecutive subcarriers in the frequency domain. That is, one physical resource block is composed of (6×12) resource elements. At this time, one physical resource block corresponds to one slot in the time domain, and 15
For a subcarrier spacing of kHz, it corresponds to 180 kHz (720 kHz for 60 kHz) in the frequency domain. Physical resource blocks are numbered from 0 in the frequency domain.

Next, subframes, slots, and minislots will be described. FIG. 5 is a diagram showing the relationship in the time domain of subframes, slots, and minislots. As shown in the figure, three types of time units may be defined. For example, the subframe may be 1 ms regardless of the subcarrier interval, the number of OFDM symbols included in the slot may be 7 or 14, and the slot length varies depending on the subcarrier interval. Here, when the subcarrier interval is 15 kHz, one subframe includes 14 OFDM symbols. Therefore, when the subcarrier interval is Δf (kHz), the slot length may be defined as 0.5/(Δf/15) ms when the number of OFDM symbols forming one slot is 7. Here, Δf may be defined by a subcarrier interval (kHz). When the number of OFDM symbols forming one slot is 14, the slot length may be defined as 1/(Δf/15) ms. Here, Δf may be defined by a subcarrier interval (kHz). Further, when the number of OFDM symbols included in a slot is X, the slot length may be defined by X/14/(Δf/15) ms.

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 the case where the minislot is composed of two OFDM symbols as an example. The OFDM symbols in a minislot may match the OFDM symbol timing that makes up the slot. The minimum unit of scheduling may be a slot or a minislot.

FIG. 6 is a diagram showing an example of slots or subframes (subframe type). Here, a case where the slot length is 0.5 ms at a subcarrier interval of 15 kHz is shown as an example. In the figure, D indicates a downlink and U indicates an uplink. As shown in the figure, within a certain time period (for example, the minimum time period that must be assigned to one UE in the system),
・Downlink part (duration)
・Gap/Uplink part (duration)
One or more of these may be included.

6A may also be referred to as a certain time section (for example, a minimum unit of time resources that can be assigned to one UE, a time unit, or the like. Further, a plurality of minimum units of time resources are bundled and referred to as a time unit. 6B is an example in which uplink scheduling is performed via the PCCH for the first time resource, and the processing delay of the PCCH and the downlink are used. The uplink signal is transmitted from the to the uplink switching time and the gap for generating the transmission signal. FIG. 6C is used for transmission of the downlink PCCH and/or the downlink PSCH with the first time resource, and through processing delay, downlink to uplink switching time, and a gap for generation of a transmission signal. Used for transmitting PSCH or PCCH. Here, as an example, the uplink signal may be used for transmitting HARQ-ACK and/or CSI, that is, UCI. FIG. 6( d) is used for transmission of the downlink PCCH and/or the downlink PSCH in the first time resource, and the processing delay, the switching time from the downlink to the uplink, and the gap for generating the transmission signal are used. It is used for transmitting the uplink PSCH and/or PCCH. Here, as an example, the uplink signal may be used for transmission of uplink data, that is, UL-SCH. FIG. 6(e) is an example where all are used for uplink transmission (uplink PSCH or PCCH).

The downlink part and the uplink part described above may be composed of a plurality of OFDM symbols as in LTE.

Here, the resource grid may be defined by a plurality of subcarriers and a plurality of OFDM symbols or SC-FDMA symbols. Further, the number of subcarriers forming one slot may depend on the bandwidth of the cell. The number of OFDM symbols forming one downlink part or one uplink part may be 1 or 2 or more. Here, each of the elements in the resource grid is referred to as a resource element. Further, the resource element may be identified using the subcarrier number and the OFDM symbol or SC-FDMA symbol number.

The base station device 3 may transmit a signal having the subframe configuration shown in FIG.

An example of the RRC connection reset message used in this embodiment will be described with reference to FIG.

As shown in FIG. 8, the RRC connection reset message is (8A)rrc-TransactionIdentifier, (8B)measConfig, (8C)mobilityControlInfo, (8D)dedicatedInfoFoedCof8,(8)radioDefoCe8,8). (8H) fullConfig, (8I) sCellToReleaseList, (8J) sCellToAddModList, (8K) systemInformationBlockDedicated may be included partially or entirely.

(8A) rrc-TransactionIdentifier is an element used to identify the RRC procedure (transaction), and has an integer of 0 to 3, for example, as a value. (8B) measConfig is information for setting the (Performed) measurement performed by the terminal device 2, and may include the setting of the gap period for the measurement. (8D) dedicatedInfoNASList is a list of information on the NAS layer specific to the terminal device 2 that is exchanged between the network and the terminal device 2, includes the information on the NAS layer for each DRB, and the RRC layer transparently transmits this information. Is transferred to the upper layer (NAS layer). (8E) radioResourceConfigDedicated may include information used for setting, changing, and/or releasing SRB or DRB, information for changing the MAC layer setting, information about the physical layer channel setting, and the like. The (8F) securityConfigHO is a setting relating to security, and may include, for example, setting of an integrity protection algorithm in the AS layer of the SRB, setting of an encryption (Ciphering) algorithm of the SRB and/or the DRB. (8H) fullConfig is information indicating whether or not a specific option is applied to this RRC connection reconfiguration message, and the terminal device 2 determines that (8H) fullConfig is included in the RRC connection reconfiguration message. Settings included in a specific element may be applied. (8I)sCellToReleaseList and (8J)sCellToAddModList may include information used for adding, changing, and/or releasing secondary cells. (8K) systemInformationBlockDedicated may include a part of the broadcast information of the target cell.

(8C) mobilityControlInfo includes parameters necessary for network-controlled mobility (for example, handover) as illustrated in FIG. 9. (8C) mobilityControlInfo is (9A) targetPhysCellId, (9B) carrierFreq, (9C) carrierBandwidth.
, (9D)t304, (9E)newUE-Identity, (9F)radioResourceConfigCommon, and (9G)rac-ConfigDedicated, may be included in part or all. In addition, (8C)mobilityControlInfo may include various other information.

(9A) targetPhysCellId indicates the identifier of the target cell (for example, physical cell identifier). Further, the targetPhysCellId may include information indicating the area within the cell (for example, time index information or SS block identifier). In addition, information indicating an area in the cell (for example, time index information or SS block identifier) may be included as a parameter different from the targetPhysCellId. (9B) carrierFreq indicates information on the frequency used by the terminal device 2 in the target cell. (9C) carrierBandwidth indicates information on the downlink and/or uplink bandwidth of the target cell. (9D) t304 indicates the value of the timer related to the handover, and for example, the terminal device 2 may execute the predetermined process when the handover is not normally completed within the time indicated by the timer. (9E) newUE-Identity indicates a new identifier (for example, C-RNTI) of the terminal device 2 in the target cell.

The (9F)radioResourceConfigCommon includes information used for specifying (Specify) common radio resource settings such as random access parameters and static physical layer parameters as shown in FIG. 10. (9F) radioResourceConfigCommon is (10A) rach-ConfigCommon, (10B) prac-Config, (10C) pdsch-ConfigCommon, (10D) push-Config-UconFun-Config-Ucon-Common, (10E) pucch-UconFun-Conf, Config-Common. (10G)uplinkPowerControlCommon, (10H)antennaInfoCommon, (10I)p-Max, and (10J)tdd-Config may be included partially or entirely. Also, the (9F)radioResourceConfigCommon may include various other information. Also, the settings of (10C)pdsch-ConfigCommon and (10D)pusch-ConfigCommon may be combined into one setting (psch-ConfigCommon). Further, the above-mentioned part or all of the information included in the (9F)radioResourceConfigCommon may be information for each area in the cell.

(10A) rach-ConfigCommon includes information used to specify a general random access parameter. For example, (10A) rach-ConfigCommon is threshold information for determining the number of non-dedicated preambles that are not individually used as the random access preamble information, and which group of preambles is used as the preamble. , And/or information regarding power ramping.

(10B) prach-Config includes information used to specify the PRACH setting. For example, (10B) prac-Config is a part of index information of a root sequence of a random access preamble, information of time/frequency resources used for random access preamble transmission, and/or information of numerology used for transmission of preamble. Or it may include all.

(10C) pdsch-ConfigCommon includes information for specifying the common PDSCH setting. For example, (10C) pdsch-ConfigCommon is information on energy per unit resource of a downlink reference signal, information on a power ratio between a downlink reference signal and PDSCH, and/or a numerology used for receiving PDCCH and/or PDSCH. Information about, may be included in whole or in part.

(10D) push-ConfigCommon includes information for specifying the common PUSCH setting and/or the setting of the uplink reference signal. For example, (10D) push-ConfigCommon may include part or all of band information of PUSCH resources, hopping information, and/or information about numerology used for transmission of PUCCH and/or PUSCH.

(10E) pusch-ConfigCommon includes information for specifying the common PUCCH setting. For example, (10E) pusch-ConfigCommon may include numerology information used for PUCCH transmission. (10F) soundingRS-UL-ConfigCommon includes information for specifying the setting of a common uplink reference signal that can be used for measurement by the base station apparatus 3. For example, (10F) soundingRS-UL-ConfigCommon may include numerology information used for transmitting part or all of the uplink reference signal. (10G)uplinkPowerControlCommon includes information for specifying the common uplink power control setting. (10H) antennaInfoCommon includes information for identifying common antenna settings. (10I) p-Max includes information for limiting the uplink transmission by the terminal device 2. (10J)tdd-Config includes information for specifying a physical channel setting specific to TDD.

The (9G) rach-ConfigDedicated includes information used to specify individual random access parameters assigned to the terminal device 2. For example, it may include a part or all of the information indicating the format of the random access preamble and the time/frequency resource explicitly, and/or the information about the numerology used for transmitting the preamble. Also, (9G) rach-ConfigDedicated may include information for each area in the cell.

(8G) otherConfig includes some or all of other settings.

In addition, (8) mobilityControlInfo or any of the information elements included in (8C) mobilityControlInfo, the terminal device 2 transmits (1) random access preamble and (2) RRC connection reset completion message transmitted in the target cell to the PUSCH. , PDCCH for receiving PDSCH including (1) synchronization signal, (2) important information block, (3) random access response message received by the terminal device 2 in the target cell, and (4) random access response message. Part of the information specifying the numerology for some or all of the PDSCH containing, (5) the PDCCH for receiving the PDSCH containing the call (paging) message, and (6) the PDSCH containing the call (paging) message. All may be included.

An example of the secondary cell group setting (SCG-Configuration) included in the RRC connection reconfiguration message will be described with reference to FIG. 11.

As shown in FIG. 11, the setting of the secondary cell group may include a part or all of (11A) scg-ConfigPartMCG and (11B) scg-ConfigPartSCG.

(11A) scg-ConfigPartMCG is a setting that is also related to the master cell group when setting the secondary cell group, for example, information about update of key information and/or information about power of the master cell group and the secondary cell group. May be included. (11B) scg-ConfigPartSCG is a setting of a secondary cell group, for example, as shown in FIG. 12, (12A)radioResourceConfigDedicatedSCG, pSCellToAddMod, (12C)sCellToListModSistGlSoIstGly, and (12D)CellsAdd(sResCell) and (12D)CellsAdd(sG), and (12D)CellsAdd(s), and (12D)CellsAdd(s), and (12D)CellsAdd(s), and (12D)CellsAdd(s), and (12D)CellsAdd, and But it's okay.

(12A) radioResourceConfigDedicatedSCG is a radio resource setting unique to the terminal device 2 with respect to the SCG, and may include information for adding/changing DRB, MAC layer setting information, timer setting values, and/or constant information. (12B) pSCellToAddMod is cell addition/change information that is a PSCell, index information for identifying the SCell (PSCell), cell identifier (eg, physical cell identifier or cell global identifier), downlink carrier frequency information. , PSCell common radio resource settings and/or PSCell terminal device 2 specific radio resource settings information may be included.

(12C) sCellToAddModListSCG is the addition/change information of the cell that is the SCell of the secondary cell group, and may include a list of one or more SCell information. Further, each SCell information includes SCell index information for identifying the SCell, a cell identifier (for example, a physical cell identifier or a cell global identifier), downlink carrier frequency information, and/or information on a common radio resource setting of the SCell. May be included. (12D) sCellToReleaseListSCG is information for releasing the SCell of the secondary cell group, and may include a list of one or more SCell index information to be released.

(12E) mobilityControlInfoSCG is information necessary for changing the secondary cell group, and is used to specify an identifier assigned to the terminal device 2 in the secondary cell group and an individual random access parameter assigned to the terminal device 2. Information and/or information about cryptographic algorithms may be included.

Here, the terminal device 2 transmits in a cell (PSCell or all SCells) of the reconfigured secondary cell group to any of the information elements included in (11B) scg-ConfigPartSCG or (11B)scg-ConfigPartSCG. (1) Random access preamble, (2) PUCCH, (3) PUSCH, (1) synchronization signal, (2) random received by the cell (PSCell or all SCells) of the reconfigured secondary cell group by the terminal device 2. PDCCH for receiving PDSCH including an access response message, (3) PDSCH including random access response message, (4) PDCCH for receiving PDSCH including call (paging) message, (5) call ( Part or all of the information specifying the numerology for part or all of the PDSCH including the paging message may be included.

For example, even if the numerology information used for transmitting the preamble is included as a part of the information included in the (12E) mobilityControlInfoSCG and used for specifying the individual random access parameter assigned to the terminal device 2, Good. When a common numerology is used in the cells of the secondary cell group, the numerology used for (12B)pSCellToAddMod to transmit/receive the above-mentioned signal and/or channel of PSCell (or common to the cells of the secondary cell group). Information may be included. When independent numerology is used in the cells of the secondary cell group, (12B) pSCellToAddMod and/or (12C) sCellToAddModListSCG, in each SCell information of each SCell, the numerology used for transmitting the above-mentioned signal and/or channel. Information may be included.

FIG. 14: is a figure which shows an example of said (8E)radioResourceConfigDedicated, (14A) srb-ToAddModList, (14B) drb-ToAddModList, (14C) drb-ToReleaseList, (14D)inCdDmaCd-maCd, MaC-maD,C14D)C(dD)CdCdCdCdCdCdCd)Cd(dD)Cd(dD)Cd(dD)Cd(dD)C(dD)C(dD)Cd(dD)C(d)Cd)(14C)drb-ToAddModify(14D)in(dD)C(dD)C(dD)Cd(dD)C(d)Cd(d)Cd(dD)Cd(dD)Cd(d)Cd(dD)Cd(dD)Cd(d)Cd(d)Cd)) included. (14A) srb-ToAddModList, (14B) drb-ToAddModList, and (14C) drb-ToReleaseList are information used for setting, changing, and/or releasing the SRB or DRB. (14D) mac-MainConfig is information for changing the setting of the MAC layer. (14E) physicalConfigDedicated is information related to physical layer channel settings.

In addition, in the RRC connection reset message (for example, (8E) radioResourceConfigDedicated and (12A) radioResourceConfigDedicatedSCG information), information related to numerology (for example, subcarrier interval (SCS) information) and/or a unit of time used for scheduling (transmission). The numerology used in each cell (or cell group) can be specified by including information for indicating a time interval, TTI (Transmission Time Interval).

For example, FIG. 15 is an example showing information on numerology and a unit of time (transmission time interval, TTI) used for scheduling. In FIG. 15, SCS indicates a subcarrier interval (unit is kHz). Symbol indicates the number of OFDM symbols included in one slot. SlotNum indicates the number of slots included in one TTI. TTI Len indicates a time unit (transmission time interval, TTI) used for scheduling (unit is ms). Idx represents an identifier (or index) that identifies a combination (parameter set) of each parameter.

For example, a plurality of parameter sets as shown in FIG. 15 may be defined in the specifications, and the RRC connection reconfiguration message may include information (Idx) indicating which parameter set is used.

Further, for example, the RRC connection reconfiguration message includes one or more parameter sets as shown in FIG. 15, and further the information (Idx indicating which parameter set is used in the RRC connection reconfiguration message. ) May be included.

Further, since TTI Len can be uniquely identified from the combination of SCS, Symbol and SlotNum, any one of the information may be omitted.

Further, since the TTI Len can be uniquely identified from the combination of SCS, Symbol and SlotNum, any one piece of information may be omitted from the parameter set.

In addition to the unit of time (transmission time interval, TTI) used for actual scheduling, information of standard TTI (dTTI) used for various calculations and the like may be added to the parameter set. Further, the standard TTI may be defined in the specifications.

Further, instead of the information on the number of OFDM symbols, the information on the OFDM symbol length may be included as a parameter.

Information about CP (Cyclic Prefix) may be included as a parameter.

In addition, when a plurality of slots are aggregated to form a scheduling cycle, aggregation level (Aggregation Level: AL) information of the slots may be included as a parameter.

Further, some or all of the information of the parameter set may be notified by another method. For example, a part of the parameter set applied to PDSCH (combination of Symbol and SlotNum) is notified by the RRC connection reconfiguration message, and SCS information is notified by another signal or channel (for example, PDCCH (DCI)). Good. By this means, even when there are multiple subcarrier interval candidates applied to PDSCH transmission in a cell, the amount of information notified in the RRC connection reconfiguration message is suppressed and the subcarrier interval and TTI are dynamically set. can do. This can be applied to the setting of channels other than PDSCH (for example, PUCCH, PUSCH, etc.).

Further, the physical layer setting information (for example, information included in (14E) physicalConfigDedicated) includes the above parameter set information, and the logical channel setting information (for example, information included in (14B) drb-ToAddModList). Information may be included that associates a logical channel with a TTI. Here, the information that associates a logical channel with a TTI is information that can identify each logical channel and the TTI used for transmission (and/or reception) of that logical channel (for example, the TTI length itself (0.5 ms or 1.0 ms). ), or the number of OFDM symbols (7 symbols or 14 symbols), or the ratio to the standard TTI (1dTTI or 0.5dTTI), slot information (1Slot or 2Slot), or slot type information (miniSlot (0.5dTTI), It may be Slot (1dTTI), MultiSlot (2dTTI), or TTI type information (NormalTTI (1dTTI), ShortenedTTI (0.5dTTI), etc.).

The above message is an example, and the RRC connection reconfiguration message may include information other than the RRC connection reconfiguration message, or may not include some information of the RRC connection reconfiguration message. Further, the RRC connection reset message may have a different structure, information element name, or parameter name than the RRC connection reset message.

An example of an operation in which the terminal device 2 in the connected state or the inactive state changes the numerology of one or more physical channels will be described with reference to FIG. 7.

Note that, here, although the procedure of changing the numerology when the mobility control information (MobilityControlInfo) of the master cell group is included in the RRC connection reconfiguration message will be described, the present invention is not limited to this, when adding or modifying a numerology, or mobility control. It can also be applied when changing the numerology when the information is not included in the RRC connection reconfiguration message or when changing or adding or modifying the numerology of the secondary cell group.

Setting the numerology may involve resetting or re-establishing the second layer (PDCP layer, RLC layer and/or MAC layer). In addition, setting the numerology may involve performing random access on the PCell. Also, the master cell group configuration may be a synchronous master cell group reconfiguration procedure (procedure with random access) including layer 2 reset and/or reestablishment. Also, the secondary cell group configuration may be a synchronous secondary cell group reconfiguration procedure (procedure with random access) that includes Layer 2 reset and/or reestablishment. Also, the setting of the master cell group may be a synchronous master cell group reconfiguration procedure (procedure with random access) including security refresh. Also, the setting of the secondary cell group may be a synchronous secondary cell group reconfiguration procedure (procedure with random access) including security refresh if DRB of the secondary cell group is set. This procedure may be used in various scenarios. For example, the scenario may be establishment of a secondary cell group (Esstablement), change of PSCell, refresh of security key, change of DRB, and/or change of numerology. The terminal device 2 may perform the operation related to the setting of the secondary cell group by receiving the RRC connection reconfiguration message including the mobility control information (mobilityControlInfoSCG) for the secondary cell group.

In the connected state, the network controls the mobility of the terminal device 2. Further, the network may control the mobility of the terminal device 2 in the inactive state. In network-controlled mobility, the PCell may be changed using an RRC connection reconfiguration message containing mobility control information. Also, in network-controlled mobility, the SCell may be changed using an RRC connection reconfiguration message that includes (or does not include) mobility control information.

Further, the secondary cell group may be established, reconfigured, or released by using an RRC connection reconfiguration message that includes (or does not include) the mobility control information of the secondary cell group. Further, in the reconfiguration of the master cell group, when random access to the PCell is required, the master cell group change procedure (that is, the RRC connection reconfiguration message including the mobilityControlInfo) may be used. Further, in the reconfiguration of the secondary cell group, when random access to the PSCell is required, the secondary cell group change procedure (that is, the RRC connection reconfiguration message including the mobilityControlInfoSCG) may be used.

The base station apparatus 3 instructs the terminal apparatus 2 to change the numerology by notifying the terminal apparatus 2 of an RRC connection reconfiguration (RRCConnectionReconfiguration) message including the setting for the terminal apparatus 2 (step S71).

The terminal device 2, which can receive the RRC connection reconfiguration message and follow the setting including the RRC connection reconfiguration message, transmits an RRC connection reconfiguration complete message (RRCConnectionReconfigurationComplete) to the base station device 3 (step S72). Further, the following resetting process is started based on the information of the RRC connection resetting message (step S73).

In the reconfiguration process of step S73, when the RRC connection reconfiguration message includes the mobility control information, the terminal device 2 synchronizes the downlink of the target PCell based on the setting. Even if the terminal device 2 includes mobility control information in the RRC connection reconfiguration message and the target PCell is the current PCell, if the RRC connection reconfiguration message includes numerology information, the new numerology information is added. Based downlink synchronization may be initiated.

Also, the MAC layer function of the master cell group and the MAC layer function of the secondary cell group may be reset if set. Further, the terminal device 2 may reestablish the function of the PDCP layer for all the established radio bearers. Further, the terminal device 2 may reestablish the function of the RLC layer of the master cell group and the function of the RLC layer of the secondary cell group if set. In addition, the terminal device 2 may deactivate other cells of the SCell of the secondary cell group except the PSCell.

Further, in the reconfiguration process of step S73, when the terminal device 2 includes the mobility control information of the secondary cell group and does not include the mobility control information of the master cell group in the RRC connection reconfiguration message (not a handover), Alternatively, when the setting of the secondary cell group included in the RRC connection reconfiguration message is set to be released, the function of the MAC layer of the secondary cell group may be reset based on the setting. Further, the terminal device 2 includes the mobility control information of the secondary cell group in the RRC connection reconfiguration message and does not include the mobility control information of the master cell group (not a handover), or includes the RRC connection reconfiguration message. The PDCP layer may be reestablished or data recovery may be performed when the configured secondary cell group is configured to release. Further, when the terminal device 2 includes the mobility control information of the secondary cell group in the RRC connection reconfiguration message, or when the setting of the secondary cell group included in the RRC connection reconfiguration message is set to be released, The RLC layer of the master cell group and/or the RLC layer of the secondary cell group may be reestablished. Further, the terminal device 2 includes the mobility control information of the secondary cell group in the RRC connection reconfiguration message and does not include the mobility control information of the master cell group (not a handover), or includes the RRC connection reconfiguration message. When the setting of the secondary cell group to be released is set to be released, other cells in the SCell of the secondary cell group other than the PSCell may be in the inactive state.

Further, in the reconfiguration process of step S73, when the received setting of the secondary cell group is set to be released, the terminal device 2 releases the setting of the secondary cell group excluding the DRB setting, and the secondary cell group is released. You may stop the timer for.

Further, in the resetting process of step S73, when the RRC connection resetting message includes the wireless resource setting unique to the terminal device 2, the terminal device 2 may reset the unique wireless resource setting. Further, when the RRC connection reconfiguration message includes the addition/change information of the cell to be the PSCell, the terminal device 2 executes addition or change of the PSCell. In addition, the terminal device 2 may add or change the SCell of the secondary cell group when the RRC connection reconfiguration message includes the addition/change information of the cell to be the SCell of the secondary cell group. Further, when the RRC connection reconfiguration message includes information for releasing the SCell of the secondary cell group, the terminal device 2 may execute the release of the SCell of the secondary cell group.

When the numerology information of the synchronization signal is included in the RRC connection reconfiguration message, the terminal device 2 may detect the synchronization signal based on the information. If the numerology information of the synchronization signal is not provided in the RRC connection reconfiguration message, the terminal device 2 may try to detect the synchronization signal using a predetermined numerology. Thereby, the numerology of the synchronization signal detected when there are a plurality of numerologies that may be used for the synchronization signal of the target cell can be uniquely specified.

Then, the terminal device 2 starts the random access procedure for transmitting the uplink data and transmits the random access preamble. Upon receiving the random access preamble, the base station device 3 detects a shift in transmission timing of the terminal device 2, and transmits a random access response including information (timing advance command) for correcting the shift to the terminal device 2 (step S74). When the numerology information of the random access preamble is included in the RRC connection reconfiguration message, the terminal device 2 may transmit the random access preamble based on the information. When a plurality of pieces of numerology information are included, the terminal device 2 may select either one. When the numerology information of the random access preamble is not provided in the RRC connection reconfiguration message, the terminal device 2 may transmit the random access preamble using a predetermined numerology. For example, the same numerology as NS-SSS or a numerology corresponding (uniquely derived) to the numerology of NR-SSS may be used. This makes it possible to set an appropriate numerology for each terminal device 2 when the target cell supports a plurality of numerologies. Further, when the RRC connection reconfiguration message includes numerology information used for PDCCH reception and/or PDSCH reception for receiving the random access response, the terminal device 2 receives the random access response based on the information. Good. If the numerology information used for PDCCH reception and/or PDSCH reception for the reception of the random access response is not provided in the RRC connection reconfiguration message, the terminal device 2 uses the same numerology as the predetermined numerology or NR-SSS. May receive a random access response. This makes it possible to set an appropriate numerology for each terminal device 2 when the target cell supports a plurality of numerologies.

Further, the PDSCH numerology including the message of the random access response may be derived by a combination of the information provided in the RRC connection reconfiguration message and the information provided in the PDCCH. For example, the above-mentioned parameter set identifier may be notified by PDCCH. Further, the information about SCS may be notified by PDCCH.

Further, the PDSCH numerology including the message of the random access response may be uniquely derived from the PDCCH numerology. For example, the numerology of PDCCH and PDSCH may be the same. In addition, a combination of numerology of PDCCH and PDSCH may be defined in advance (or set by an RRC connection reconfiguration message).

Also, the numerology of the uplink resource (PUCCH transmission resource and/or PUSCH transmission resource) allocated by the uplink grant provided in the random access response is provided in the information provided in the RRC connection reconfiguration message and the PDCCH. It may be derived in combination with information. For example, the above-mentioned parameter set identifier may be notified by PDCCH. Further, the information about SCS may be notified by PDCCH.

Moreover, the numerology of the uplink resources (PUCCH transmission resource and/or PUSCH transmission resource) allocated by the uplink grant provided in the random access response may be uniquely derived from the numerology of the PDCCH. For example, the numerology of PDCCH and PUSCH may be the same. Also, the combination of the numerology of PDCCH and PUSCH may be defined in advance (or set by the RRC connection reconfiguration message). The numerology of PDCCH and PUCCH may be the same. In addition, a combination of numerology of PDCCH and PUCCH may be defined (or set by an RRC connection reconfiguration message) in advance.

Further, the PDSCH numerology may be derived by a combination of information provided in the RRC connection reconfiguration message and information provided in the PDCCH. For example, the above-mentioned parameter set identifier may be notified by PDCCH. Also, SCS on PDCCH
Information may be notified.

Further, the PDSCH numerology may be uniquely derived from the PDCCH numerology. For example, the numerology of PDCCH and PDSCH indicated by PDCCH may be the same. Further, a combination of numerology of PDCCH and PDSCH indicated by PDCCH may be defined in advance (or set by an RRC connection reconfiguration message).

Also, the numerology of the uplink resources (PUCCH transmission resource and/or PUSCH transmission resource) allocated by the uplink grant is derived by the combination of the information provided in the RRC connection reconfiguration message and the information provided in the PDCCH. May be. For example, the above-mentioned parameter set identifier may be notified by PDCCH. Further, the information about SCS may be notified by PDCCH.

Moreover, the numerology of the uplink resources (PUCCH transmission resource and/or PUSCH transmission resource) allocated by the uplink grant may be uniquely derived from the numerology of the PDCCH. For example, the numerology of PDCCH and PUSCH indicated by PDCCH may be the same. Also, a combination of numerology of PDCCH and PUSCH indicated by PDCCH may be specified (or set by an RRC connection reconfiguration message) in advance. The numerology of PDCCH and PUCCH may be the same. In addition, a combination of numerology of PDCCH and PUCCH may be defined (or set by an RRC connection reconfiguration message) in advance.

An example of processing regarding uplink transmission is shown. The physical layer of the terminal device 2 derives the size of the uplink resource assigned to the own station and the length of the TTI by receiving the DCI indicating the uplink grant on the PDCCH, and notifies the MAC layer of the terminal device 2 To do. The MAC layer of the terminal device 2 generates a MAC PDU to be transmitted based on at least the length of the TTI assigned to the logical channel and the priority (LCP: Logical Channel Priority) of the logical channel. At this time, the derivation of the priority between the logical channels by the LCP may be performed only between the logical channels associated with the TTI length of the allocated uplink resource. Also, when the TTI length of the allocated uplink resource is not associated with any of the logical channels, the allocated uplink resource may be regarded as invalid. Further, even if the TTI length of the assigned uplink resource is not associated with any of the logical channels, it can be considered that the assigned uplink resource is associated with all the logical channels. Good.

Next, an example of a procedure for adding and correcting numerology will be described with reference to FIG.

Setting the numerology may not involve resetting or re-establishing part of the second layer (PDCP layer, RLC layer and/or MAC layer). Moreover, the numerology setting does not have to be accompanied by the execution of random access. Also, the master cell group configuration may be a master cell group reconfiguration procedure (procedure without random access) that does not include Layer 2 reset and/or reestablishment. Further, the setting of the secondary cell group may be a secondary cell group reconfiguration procedure (procedure without random access) that does not include resetting and/or reestablishing a part of the second layer. The terminal device 2 may perform the operation related to the setting of the secondary cell group by receiving the RRC connection reconfiguration message including the mobility control information (mobilityControlInfoSCG) for the secondary cell group.

In the connected state, the network controls the mobility of the terminal device 2. Further, the network may control the mobility of the terminal device 2 in the inactive state. In network-controlled mobility, the PCell may be changed using an RRC connection reconfiguration message containing mobility control information. Further, in network-controlled mobility, the SCell (including PSCell) may be changed using an RRC connection reconfiguration message that includes (or does not include) mobility control information.

Further, the secondary cell group may be established, reconfigured, or released by using an RRC connection reconfiguration message that includes (or does not include) the mobility control information of the secondary cell group. Further, in the reconfiguration of the master cell group, when random access to the PCell is required, the master cell group change procedure (that is, the RRC connection reconfiguration message including the mobilityControlInfo) may be used. Further, in the reconfiguration of the secondary cell group, when random access to the PSCell is required, the secondary cell group change procedure (that is, the RRC connection reconfiguration message including the mobilityControlInfoSCG) may be used.

The base station device 3 notifies the terminal device 2 of an RRC connection reconfiguration message (RRCConnectionReconfiguration) including a setting for the terminal device 2, thereby performing a setting involving addition and/or correction and/or deletion of numerology information. Is instructed to the terminal device 2 (step S131).

The terminal device 2, which can receive the RRC connection reconfiguration message and follow the setting including the RRC connection reconfiguration message, transmits the RRC connection reconfiguration complete message (RRCConnectionReconfigurationComplete) to the base station device 3 (step S132). Further, the following resetting process is started based on the information of the RRC connection resetting message (step S133).

In the reconfiguration process of step S133, the terminal device 2 includes the mobility control information of the secondary cell group in the RRC connection reconfiguration message and does not include the mobility control information of the master cell group (not the handover), or RRC. When the setting of the secondary cell group included in the connection reconfiguration message is set to be released, the function of the MAC layer of the secondary cell group may be reset based on the setting. When the mobility control information of the secondary cell group is included in the RRC connection reconfiguration message and the mobility control information of the master cell group is not included (not a handover), or the secondary cell group setting included in the RRC connection reconfiguration message is Even when the cell is set to be released, when the PCell and the PSCell are in the same cell (or when the RRC connection reconfiguration message instructs the cell to be set to the same cell), the terminal device 2 is No need to re-establish or data recovery. However, for example, in a situation where the PSCell is already set to a cell different from the PCell, and the PSCell is changed to the same cell as the PCell, etc., the DRB is split into both the MCG and the SCG (Split DRB). ) And/or SCG-only DRB (SCG
If DRB) was present, PDCP layer data recovery may be performed. Further, for example, in a situation where the same cell as the PCell has already been set in the PSCell and the PSCell has been changed to a cell different from the PCell, the RRC connection reconfiguration message is divided into both MCG and SCG (split). If there is a DRB (Split DRB), the terminal device 2 may perform data recovery of the PDCP layer. Further, when the terminal device 2 includes the mobility control information of the secondary cell group in the RRC connection reconfiguration message, or when the setting of the secondary cell group included in the RRC connection reconfiguration message is set to be released, The RLC layer of the master cell group and/or the RLC layer of the secondary cell group may be reestablished. Further, the terminal device 2 includes the mobility control information of the secondary cell group in the RRC connection reconfiguration message and does not include the mobility control information of the master cell group (not a handover), or includes the RRC connection reconfiguration message. When the setting of the secondary cell group to be released is set to be released, other cells in the SCell of the secondary cell group other than the PSCell may be in the inactive state.

In addition, in the resetting process of step S133, when the setting of the received secondary cell group is set to be released, the terminal device 2 releases the setting of the secondary cell group excluding the DRB setting to set the secondary cell group. You may stop the timer for.

Further, in the resetting process of step S133, when the RRC connection resetting message includes the wireless resource setting unique to the terminal device 2, the terminal device 2 may reset the unique wireless resource setting. Further, when the RRC connection reconfiguration message includes the addition/change information of the cell to be the PSCell, the terminal device 2 executes addition or change of the PSCell. In addition, the terminal device 2 may add or change the SCell of the secondary cell group when the RRC connection reconfiguration message includes the addition/change information of the cell to be the SCell of the secondary cell group. Further, when the RRC connection reconfiguration message includes information for releasing the SCell of the secondary cell group, the terminal device 2 may execute the release of the SCell of the secondary cell group.

The terminal device 2 may transmit an RRC connection reconfiguration complete message (RRCConnectionReconfigurationComplete) to the base station device 3. In this case, the RRC connection reconfiguration complete message may be transmitted by the Cell (to which the SRB transmission resource is allocated).

In this way, by including the numerology information in the MCG setting and the SCG setting of the RRC connection reconfiguration message (for example, (8E) radioResourceConfigDedicated and (12A) radioResourceConfigDedicatedSCG setting information of each MAC layer), it is used in the cell. Multiple numerologies can be specified.

Here, an example of DCI (Downlink Control Information) transmitted by NR-PDCCH is shown.

For example, an example in which scheduling information of PUSCH is defined as DCI Format 0 is shown. The DCI Format 0 may include multi-bit information (Carrier Indicator) indicating a scheduled component carrier. Further, the DCI Format 0 may include another format having the same length and a flag of 1 or more bits for identifying this format. Further, DCI Format 0 may include an information bit indicating the resource position of the scheduled PUSCH. Further, DCI Format 0 may include information for hopping the resource position. In addition, the DCI Format 0 may include information indicating a modulation scheme, a coding scheme, and a redundancy version (Redundancy Version). In addition, DCI Format 0 has New Data indicating whether it is New Data.
An Indicator may be included. Further, DCI Format 0 may include a transmission power control command (TPC) for performing power control of scheduled PUSCH. Further, the DCI Format 0 may include information (SRS Request) requesting SRS transmission. Further, the DCI Format 0 may include information regarding the subcarrier interval of the scheduled PUSCH. Further, the DCI Format 0 may include other necessary information.

For example, an example in which PDSCH scheduling information is defined as DCI Format 1 is shown. The DCI Format 1 may include a plurality of bits of information (Carrier Indicator) indicating a component carrier on which the PDSCH is scheduled. Further, DCI Format 1 may include an information bit indicating the resource position of the PDSCH to be scheduled. In addition, the DCI Format 1 may include information indicating a modulation method, a coding scheme, and a redundancy version (Redundancy Version). Further, the DCI Format 1 may include a HARQ process number (HARQ Process Number). Further, the DCI Format 1 may include a New Data Indicator indicating whether it is New Data. In addition, the DCI Format 1 may include a transmission power control command (TPC) for performing power control of the scheduled PUCCH. Further, the DCI Format 1 may include information on the subcarrier interval of the scheduled PDSCH. Further, the DCI Format 1 may include information regarding a subcarrier interval of the scheduled PUCCH. Further, the DCI Format 1 may include other necessary information.

(14B) An example of each drb-ToAddMod that is included in drb-ToAddModList is shown. The drb-ToAddMod may include an identifier that identifies the EPS bearer when setting up the DRB. Also, drb-ToAddMod may include PDCP layer setting information. Further, drb-ToAddMod may include setting information of the RLC layer. Also, drb-ToAddMod may include a logical channel identifier corresponding to the DRB when setting up the DRB. Further, drb-ToAddMod may include logical channel setting information. Further, drb-ToAddMod may include information indicating the TTI length associated with the logical channel. Here, the information indicating the TTI length associated with the logical channel is information that can identify the TTI length used for transmission (and/or reception) of the logical channel (for example, the TTI length itself (0.5 ms or 1.0 ms)). , Or the number of OFDM symbols (7 symbols or 14 symbols), or the ratio with standard TTI (1dTTI or 0.5dTTI), or slot information (1Slot or 2Slot, or miniSlot (0.5dTTI), Slot (1dTTI), MultiSlot). (2dTTI)) and the like). Further, other necessary information may be included in drb-ToAddMod.

An example of the numerology information included in (8E) radioResourceConfigDedicated and/or (12A) radioResourceConfigDedicatedSCG is shown. The numerology information includes numerology addition/modification information and may include a list of one or more numerology settings, similar to (12C)sCellToAddModListSCG. Further, as in the case of (12D)sCellToReleaseListSCG, a list for deleting numerology settings may be included. Also, the settings of each channel and each signal included in the information included in (14E) physicalConfigDedicated (for example, pdsch-ConfigDedicated, which is the setting of PDSCH, pdcch-ConfigDedicated, which is the setting of PDCCH, and pupuCH-Configured, which is the setting of PUCCH. The numerology information may be included for each of push-ConfigDedicated, which is the setting of SRS, soundingRS-UL-ConfigDedicated, which is the setting of SRS, and schedulingRequestConfig which is the setting of the scheduling request (SR). Alternatively, (14E) physicalConfigDedicated may include numerology information commonly used for each channel (or common to each of the uplink channel and the downlink channel).

Further, the numerology setting information of each channel and each signal may be configured as one or a plurality of sets. For example, the numerology of each channel and each signal may be set as the primary numerology (or primary numerology set), and another numerology may be set for each channel and each signal as the secondary numerology (or secondary numerology set). For example, the primary numerology and/or secondary numerology setting information may include uplink numerology and downlink numerology settings that are common to each physical channel. Alternatively, the primary numerology and/or secondary numerology setting information may include numerology settings for each physical channel. For example, (14E) physicalConfigDedicated may be included in the setting information of the primary numerology and/or secondary numerology, and the setting information of the primary numerology and/or the secondary numerology may be included in (14E) physicalConfigDedicated.

Further, an RRC connection reconfiguration message including mobility control information may be used when changing the primary numerology, and an RRC connection reconfiguration message that does not include mobility control information may be used when changing the secondary numerology. Further, it may be specified or notified whether the primary numerology or the secondary numerology is used for each component carrier or each cell group. Further, the switching between the primary numerology and the secondary numerology may be notified by signaling of the RRC layer, the MAC layer, or the physical layer (eg, RRC connection reconfiguration message or MAC control element or DCI). Also, a plurality of secondary numerologies may be set. In this case, an identifier for identifying each secondary numerology may be set. Further, the primary numerology may be referred to as master numerology.

Further, the primary numerology setting may be included in the mobility control information, and the secondary numerology setting may be included in the elements of the RRC connection reconfiguration message other than the mobility control information. Further, both the primary numerology setting and the secondary numerology setting may be included in the elements of the RRC connection reconfiguration message other than the mobility control information. Further, the primary numerology and/or the secondary numerology may be settings separated in the uplink and the downlink. That is, the uplink primary numerology and the downlink primary numerology may be defined. In addition, the RRC connection reconfiguration message for adding/modifying SCell and/or PSCell may include numerology information set in the cell. In addition, the RRC connection reconfiguration message element that adds SCell and/or PSCell (for example, each cell information of (8J)sCellToAddModList and (12B)pSCellToAddMod) includes information capable of determining which numerology is to be applied. Good. For example, it indicates whether the primary numerology or the secondary numerology is applied to the element of the RRC connection reconfiguration message that adds SCell and/or PSCell (for example, each cell information of (8J)sCellToAddModList and (12B)pSCellToAddMod). Information (for example, 1-bit information) may be included. For example, SCell and/or P
When the numerology information to be applied to the elements of the RRC connection reconfiguration message for adding SCell (for example, each cell information of (8J)sCellToAddModList and (12B)pSCellToAddMod) is not included, the default numerology (for example, primary numerology) is applied. May be.

Further, the numerology setting of the primary numerology and/or the secondary numerology may include a plurality of numerology settings. In this case, the maximum number (for example, up to 2) may be set for the type of numerology included in the numerology settings of the primary numerology and/or the secondary numerology. Also, the secondary numerology may include the same settings as the primary numerology.

Further, the downlink numerology setting may be set for each PUCCH group and/or for each physical channel. When a common PUCCH resource is used for multiple serving cells, those multiple serving cells may be one PUCCH group. For example, when PUCCH signaling of a plurality of serving cells including the PCell is associated with the PUCCH of the PCell, this PUCCH group may be the Primary PUCCH group. For example, when PUCCH signaling of a plurality of serving cells including SCells is associated with a PUCCH of a certain SCell in which the PUCCH is set, this PUCCH group may be the Secondary PUCCH group. A common downlink numerology may be set for one PUCCH group. When there are a plurality of PUCCH groups, a common downlink numerology may be set for each PUCCH group. At this time, the downlink numerology common to each PUCCH group may include an independent numerology for each physical channel.

Further, the maximum number of PUCCH groups (for example, up to two) may be set for each cell group. Also, a maximum number (for example, up to two) may be set for the type of numerology set for each physical channel of the uplink and/or the downlink.

Further, either the setting of the primary numerology or the setting of the secondary numerology, or each of them may include the setting of the numerology for each PUCCH group. Further, any of the numerology settings for each PUCCH group, or each of them, may include a primary numerology setting and a secondary numerology setting.

In addition, the setting information of CSI-RS may be included in the information elements included in the RRC connection reconfiguration message (for example, (8E) radioResourceConfigDedicated, (12A) radioResourceConfigDedicatedSCG, and measurement object (Measurement Object) for RRM measurement). Further, the setting information may include information indicating the numerology of each CSI-RS or information indicating the numerology of each CSI-RS set. Further, when different numerologies are set between CSI-RSs, the terminal device 2 may regard all CSI-RS settings as valid. Further, the terminal device 2 may regard only the numerology CSI-RS setting set for PDSCH reception as valid.

In addition, the terminal device 2 may support a TTI bundle (TTI bundled). TTI bundling is for scheduling PUSCH resources of a plurality of TTIs using one PDCCH in a situation where radio quality is poor, such as at a cell edge, and applying an incremental redundancy method of HARQ processing to resources of each TTI. The data to which the Redundancy version (RV) is changed (RV cyclized data) is arranged, or the same data is repeated (Repeated data) in order to apply the Chase combining method. is there. For example, the RRC connection reconfiguration message may include information indicating whether or not to enable TTI bundling. Further, the bundling size may be set to a predetermined value (for example, four). Alternatively, the bundling size may be notified by a message or signal of the RRC layer, the MAC layer, or the physical layer. For example, (A) in the physical layer function of the terminal device 2, PUSCH of 2 ms TTI in which four slots of 0.5 ms are aggregated is assigned by slot aggregation. (B) The MAC layer function of the terminal device 2 generates a MAC PDU including data of a logical channel set to be transmitted with a TTI of 2 ms and gives it to the physical layer. (C) The physical layer function of the terminal device 2 generates data of four different RVs when TTI bundling is effective, for example, when the bundling size is 4, (when the Incremental redundancy method is applied), The data generated using the four PUSCH resources is transmitted. That is, in (A), a slot having a length of 0.5 ms forms a 2 ms TTI using four slots by slot aggregation. As a result, the schedule is performed in units of 2 ms. Then, in (B), data of the logical channel permitted to be transmitted in 2 ms TTI is assigned to PUSCH. Next, in (C), when the data assigned to the PUSCH of 2 ms TTI by TTI bundling is applied by the Incremental redundancy method, it is transmitted as 4 data of different RVs by using 4 PUSCH resources (over 8 ms). To be done. Further, in (C), when the Chase combining method is applied, four replicated data are transmitted using four PUSCH resources (over 8 ms).

In the above embodiment, an example in which the numerology is set for each channel has been shown, but in addition to that, the correspondence between the time resource and the numerology is notified using the RRC connection reconfiguration message and/or the MAC control element and/or the DCI. May be done. For example, a partial section (slot, subframe, frame, or the like) that constitutes a time section with a unit of a certain time length (for example, a frame, a superframe, a hyperframe, or a range of 40 ms or 80 ms from the beginning of a certain reference frame) Information indicating the position (combination) and information indicating the numerology (uplink and/or downlink) may be notified. As a result, it is possible to communicate using a plurality of numerologies without individually reporting information for each channel.

In the above description, the word "numerology" is used for convenience, but some or all of the following parameters (A) to (G) used in the system are numerology.
(A) Sampling rate (B) Subcarrier interval (C) Subframe length (D) Time unit used for scheduling (transmission time interval, TTI: Transmission Time Interval)
(E) OFDM symbol length (F) Number of OFDM symbols included in one subframe (G) Antenna port for transmitting signal and/or channel In the above embodiment, the MAC layer setting (for example, each of the mac-MainConfig and Information on a transmission time interval (TTI) may be included in DRB-ToAddMod or the like. Further, the physical layer channel setting (for example, radioResourceConfigDedicated or physicalConfigDedicated) may include information on a subcarrier interval (for each signal and/or channel) and/or information on the number of OFDM symbols included in one subframe. .. Further, the physical layer of the terminal device 2 may notify the MAC layer of the terminal device 2 of the transmission time interval of the received downlink data and/or the information of the transmission time interval of the acquired uplink transmission resource. .. This allows the MAC layer of the terminal device 2 to perform appropriate scheduling based on the transmission time interval.

In the above-described embodiment, there is a part where the transmission time interval (TTI) is included in the numerology, but the present invention is not limited to this, and may be set as another parameter. Even in this case, when a message includes numerology information, the message may include a transmission time interval (TTI).

Further, the “TTI” used in the above description may be referred to as a “transmission duration (Transmission Duration)”.

The configuration of the device according to the embodiment of the present invention will be described.

FIG. 2 is a schematic block diagram showing the configuration of the terminal device 2 of this embodiment. As illustrated, the terminal device 2 is configured to include a wireless transmission/reception unit 20 and an upper layer processing unit 24. The wireless transmission/reception unit 20 includes an antenna unit 21, an RF (Radio Frequency) unit 22, and a baseband unit 23. The upper layer processing unit 24 includes a medium access control layer processing unit 25 and a radio resource control layer processing unit 26. The wireless transmission/reception unit 20 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit. In addition, a control unit that controls the operation of each unit based on various conditions may be separately provided.

The upper layer processing unit 24 outputs the uplink data (transport block) generated by the user's operation or the like to the wireless transmission/reception unit 20. The upper layer processing unit 24 includes a medium access control (MAC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a radio resource control (Radio). Performs some or all of the processing of the Resource Control (RRC) layer.

The medium access control layer processing unit 25 included in the upper layer processing unit 24 performs processing of the medium access control layer. The medium access control layer processing unit 25 controls the transmission of the scheduling request based on various setting information/parameters managed by the wireless resource control layer processing unit 26.

The radio resource control layer processing unit 26 included in the upper layer processing unit 24 performs processing of the radio resource control layer. The radio resource control layer processing unit 26 manages various setting information/parameters of its own device. The radio resource control layer processing unit 26 sets various setting information/parameters based on the upper layer signal received from the base station device 3. That is, the radio resource control layer processing unit 26 sets various setting information/parameters based on the information indicating various setting information/parameters received from the base station device 3.

The wireless transmission/reception unit 20 performs physical layer processing such as modulation, demodulation, encoding, and decoding. The wireless transmission/reception unit 20 separates, demodulates, and decodes the signal received from the base station device 3, and outputs the decoded information to the upper layer processing unit 24. The wireless transmission/reception unit 20 generates a transmission signal by modulating and encoding data and transmits it to the base station device 3.

The RF unit 22 converts a signal received via the antenna unit 21 into a baseband signal by quadrature demodulation (down conversion: down covert) and removes unnecessary frequency components. The RF unit 22 outputs the processed analog signal to the baseband unit.

The baseband unit 23 converts the analog signal input from the RF unit 22 into an analog signal into a digital signal. The baseband unit 23 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal, performs a fast Fourier transform (Fast Fourier Transform: FFT) on the signal from which the CP is removed, and outputs a signal in the frequency domain. Extract.

The baseband unit 23 performs inverse fast Fourier transform (IFFT) on the data to generate SC-FDMA symbols, adds CP to the generated SC-FDMA symbols, and outputs a baseband digital signal. Generate and convert baseband digital signals to analog signals. The baseband unit 23 outputs the converted analog signal to the RF unit 22.

The RF unit 22 uses a low-pass filter to remove excess frequency components from the analog signal input from the baseband unit 23, up-converts the analog signal into a carrier frequency, and transmits the analog signal via the antenna unit 21. To do. The RF unit 22 also amplifies the power. The RF unit 22 may have a function of controlling transmission power. The RF unit 22 is also referred to as a transmission power control unit.

Note that the terminal device 2 may be configured to include some or all of each unit in order to support transmission/reception processing in a plurality of frequencies (frequency bands, frequency bandwidths) or cells in the same subframe.

FIG. 3 is a schematic block diagram showing the configuration of the base station device 3 of this embodiment. As illustrated, the base station device 3 is configured to include a wireless transmission/reception unit 30 and an upper layer processing unit 34. The wireless transmission/reception unit 30 includes an antenna unit 31, an RF unit 32, and a baseband unit 33. The upper layer processing unit 34 includes a medium access control layer processing unit 35 and a radio resource control layer processing unit 36. The wireless transmission/reception unit 30 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit. In addition, a control unit that controls the operation of each unit based on various conditions may be separately provided.

The upper layer processing unit 34 controls the medium access control (MAC: Medium Access C).
Control layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, Radio Resource Control (Radio Resource)
Control (RRC) layer is partially or entirely processed.

The medium access control layer processing unit 35 included in the upper layer processing unit 34 performs processing of the medium access control layer. The medium access control layer processing unit 35 performs processing relating to a scheduling request based on various setting information/parameters managed by the wireless resource control layer processing unit 36.

The radio resource control layer processing unit 36 included in the upper layer processing unit 34 performs processing of the radio resource control layer. The radio resource control layer processing unit 36 generates downlink data (transport block) arranged in the physical downlink shared channel, system information, RRC message, MAC CE (Control Element), or the like, or acquires from the upper node. , To the wireless transmission/reception unit 30. Further, the radio resource control layer processing unit 36 manages various setting information/parameters of each terminal device 2. The radio resource control layer processing unit 36 may set various setting information/parameters for each terminal device 2 via the signal of the upper layer. That is, the radio resource control layer processing unit 36 transmits/notifies information indicating various setting information/parameters.

The function of the wireless transmission/reception unit 30 is the same as that of the wireless transmission/reception unit 20, and the description thereof will be omitted. When the base station device 3 is connected to one or more transmission/reception points 4, some or all of the functions of the wireless transmission/reception unit 30 may be included in each transmission/reception point 4.

In addition, the upper layer processing unit 34 is arranged between the base station devices 3 or an upper network device (MME).
, S-GW (Serving-GW) and the base station device 3 transmits (transfers) or receives user data. In FIG. 3, other constituent elements of the base station apparatus 3 and transmission paths of data (control information) between the constituent elements are omitted, but other functions necessary for operating as the base station apparatus 3 are omitted. It is clear that it has a plurality of blocks that it has as a component. For example, a radio resource management (Radio Resource Management) layer processing unit and an application layer processing unit exist above the radio resource control layer processing unit 36.

Note that the “unit” in the figure is an element that realizes the function and each procedure of the terminal device 2 and the base station device 3, which is also expressed by terms such as section, circuit, constituent device, device, and unit.

Each of the units denoted by reference numerals 20 to 26 included in the terminal device 2 may be configured as a circuit. Each of the units denoted by reference numerals 30 to 36 included in the base station device 3 may be configured as a circuit.

Various aspects of the terminal device 2 and the base station device 3 in the embodiment of the present invention will be described.

(1) A first aspect of the present invention is a terminal device, which is a first device showing one or a plurality of candidates of any combination of a subcarrier interval, the number of slots, the number of OFDM symbols, and a transmission time interval. A combination of a receiving unit that receives information and at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a physical channel based on at least the first information, or one of the combinations Or a control unit that specifies a plurality of candidates.

(2) In the first aspect of the present invention, the receiving unit further receives second information indicating association of each one or a plurality of logical channels with a transmission time interval, and based on the first information. The medium access control layer processing unit is configured to generate a MAC layer protocol data unit (MAC-PDU) based on the specified transmission time interval and the second information.

(3) In the first aspect of the present invention, the first information is notified by an RRC connection reconfiguration message.

(4) In the first aspect of the present invention, the first information includes mobility control information (MCI) in an RRC connection reconfiguration message when the combination is switched to another combination, and the first information is the first information. Information does not include mobility control information (MCI) in the RRC connection reconfiguration message when the candidate for the combination is added or changed.

(5) In the first aspect of the present invention, the transmission time interval of the corresponding physical downlink shared channel is determined based on the information (second information) notified by the physical downlink control channel and the first information. Identify.

(6) In the first aspect of the present invention, the transmission time interval of the assigned physical uplink shared channel is determined based on the information (third information) notified by the physical downlink control channel and the first information. Identify.

(7) A second aspect of the present invention is a base station apparatus, which is a first station that indicates one or a plurality of candidates for a combination of subcarrier intervals, the number of slots, the number of OFDM symbols, and a transmission time interval. And a transmission unit configured to transmit the first information and set at least a subcarrier interval (SCS) and a transmission time interval (TTI) for a physical channel based on at least the first information. ), or one or a plurality of candidates of the combination, for transmitting a physical channel.

(8) A third aspect of the present invention is a communication method applied to a terminal device, which comprises one or a plurality of combinations of subcarrier intervals, the number of slots, the number of OFDM symbols, and transmission time intervals. Receiving first information indicating a candidate, and combining at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a physical channel based on at least the first information, Or identifying one or more candidates for the combination.

(9) A fourth aspect of the present invention is an integrated circuit implemented in a terminal device, wherein one or a plurality of combinations of the subcarrier interval, the number of slots, the number of OFDM symbols, and the transmission time interval is used. A function of receiving first information indicating a candidate, and a combination of at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a physical channel based on at least the first information; Alternatively, the terminal device is caused to exhibit the function of specifying one or more candidates of the combination.

(10) A fifth aspect of the present invention is a communication method applied to a base station apparatus, which is one or a plurality of combinations of subcarrier intervals, the number of slots, the number of OFDM symbols, and transmission time intervals. And generating at least subcarrier spacing (SCS) set for a physical channel based on at least the first information and transmitting the first information. Transmitting a physical channel using either a combination with a transmission time interval (TTI) or one or more candidates of said combination.

(11) A sixth aspect of the present invention is an integrated circuit implemented in a base station apparatus, wherein one or a plurality of combinations of subcarrier intervals, the number of slots, the number of OFDM symbols, and the transmission time intervals are provided. And a function of generating first information indicating a candidate of, and at least a subcarrier interval (SCS) that is set for a certain physical channel based on at least the first information and transmitting the first information. The base station apparatus is caused to exhibit a function of transmitting a physical channel by using one of a combination with a transmission time interval (TTI) or one or more candidates of the combination.

As a result, the terminal device 2 and the base station device 3 can efficiently communicate with each other.

The embodiment described above is merely an example, and can be realized using various modifications and substitutions. For example, the uplink transmission scheme can be applied to both the FDD (frequency division duplex) scheme and the TDD (time division duplex) scheme. Further, the names of each parameter and each event shown in the embodiment are referred to for convenience of explanation, and even if the name actually applied and the name of the embodiment of the present invention are different, It does not affect the gist of the claimed invention in the embodiments of the invention.

Further, the "connection" used in each embodiment is not limited to a configuration in which a certain device and another certain device are directly connected using a physical line, and they are logically connected. And configurations that are wirelessly connected using wireless technology.

The terminal device 2 is also called a user terminal, a mobile station device, a communication terminal, a mobile device, a terminal, a UE (User Equipment), or an MS (Mobile Station). The base station device 3 includes a radio base station device, a base station, a radio base station, a fixed station, an NB (NodeB), and an eNB(
evolved NodeB), BTS (Base Transceiver Station), BS (Base Station), NR NB (NR NodeB), NNB, TRP (Transmission and Reception Point), and gNB (next Generation Node).

The base station device 3 according to the present invention can also be realized as an aggregate (device group) composed of a plurality of devices. Each of the devices forming the device group may include some or all of the functions or functional blocks of the base station device 3 according to the above-described embodiment. It suffices for the device group to have one set of functions or each function block of the base station device 3. Further, the terminal device 2 according to the above-described embodiment can also communicate with the base station device 3 as an aggregate.

In addition, the base station device 3 in the above-described embodiment may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network) or a next-generation core network (NextGen Core). Moreover, the base station apparatus 3 in the above-mentioned embodiment may have a part or all of the functions of the upper node with respect to the eNodeB.

The program that operates in the device according to the present invention may be a program that controls a Central Processing Unit (CPU) or the like to cause a computer to function so as to realize the functions of the embodiments 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) or a non-volatile memory such as a flash memory, a Hard Disk Drive (HDD), or another storage device system.

The program for realizing the functions of the embodiments according to the present invention may be recorded in a computer-readable recording medium. It may be realized by causing a computer system to read and execute the program recorded in this recording medium. The “computer system” here is a computer system built in the apparatus and includes an operating system and hardware such as peripheral devices. Further, 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.

Further, 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, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or others. Programmable logic devices, discrete gate or transistor logic, discrete hardware components, or combinations thereof. A general purpose processor may be a microprocessor, conventional processor, controller, microcontroller, or state machine. The electric circuit described above may be formed of a digital circuit or an analog circuit. Further, in the event that an integrated circuit technology that replaces the current integrated circuit has emerged due to the progress of semiconductor technology, one or more aspects of the present invention can use a new integrated circuit according to the technology.

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

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes and the like within a range not departing from the gist of the present invention. The present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Be done. Further, a configuration in which the elements described in each of the above-described embodiments and having the same effect are replaced with each other is also included.

2 terminal device 3 base station device 20, 30 wireless transceiver unit 21, 31 antenna unit 22, 32 RF unit 23, 33 baseband unit 24, 34 upper layer processing unit 25, 35 medium access control layer processing unit 26, 36 wireless resource Control layer processing unit 4 Transmission/reception point

Claims (5)

A terminal device,
A receiving unit that receives first information indicating one or a plurality of candidates for any combination of the subcarrier interval, the number of slots, the number of OFDM symbols, and the transmission time interval,
Control for identifying at least a combination of at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a physical channel, or one or more candidates for the combination, based on at least the first information And a terminal device including a unit. The receiving unit further receives second information indicating the association of each of the one or more logical channels with the transmission time interval,
The medium access control layer processing part which produces|generates a MAC layer protocol data unit (MAC-PDU) based on the transmission time interval specified based on the said 1st information, and the said 2nd information. Terminal equipment. A base station device,
A control unit that generates first information indicating one or a plurality of candidates for any combination of the subcarrier interval, the number of slots, the number of OFDM symbols, and the transmission time interval,
A combination of at least a subcarrier interval (SCS) and a transmission time interval (TTI) that is set for a physical channel based on at least the first information and that transmits the first information, or a combination of the combinations. A base station apparatus comprising a transmitter that transmits a physical channel using any one or a plurality of candidates. A communication method applied to a terminal device,
Receiving first information indicating one or more candidates of any combination of subcarrier spacing, number of slots, number of OFDM symbols, transmission time interval,
Identifying at least a combination of at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a physical channel, or at least one candidate for the combination, based on at least the first information A communication method comprising: An integrated circuit mounted on a terminal device,
A function of receiving first information indicating one or a plurality of candidates for any combination of the subcarrier interval, the number of slots, the number of OFDM symbols, the transmission time interval,
A function of specifying at least one combination of at least a subcarrier interval (SCS) and a transmission time interval (TTI) set for a certain physical channel, or one or more candidates for the combination, based on at least the first information. An integrated circuit characterized by:

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