Terminal device, base station device, and communication method

Abstract

The present disclosure relates to a terminal device, a base station device, and a communication method. To significantly improve the transmission efficiency of a communication system as a whole by flexibly designing the system according to various use cases in a communication system in which a base station device and a terminal device communicate with each other. A terminal device has a higher layer processing unit that sets at least one first RAT and at least one second RAT through higher layer signaling from a base station device, and a reception unit that receives a transmission signal in the first RAT and a transmission signal in the second RAT. The transmission signal in the first RAT is mapped on a resource element based on one physical parameter configuration in each of one or more subframes. The transmission signal in the second RAT is mapped on a resource element based on one or more physical parameter configurations in each of one or more subframes, and on a resource element based on one physical parameter configuration in a predetermined resource included in each subframe.

Description

[0001] This application is a divisional application of the invention patent application filed on February 2, 2017, entitled "Terminal Equipment, Base Station Equipment and Communication Method", with application number 201780023214.2. Technical Field

[0002] This disclosure relates to a terminal device, a base station device, and a communication method. Background Technology

[0003] The 3rd Generation Partnership Project (3GPP) reviewed radio access schemes and radio networks for cellular mobile communications (hereinafter also referred to as Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Advanced Pro (LTE-A Pro), New Radio (NR), New Radio Access Technology (NRAT), Evolved Universal Terrestrial Radio Access (EUTRA), or Further EUTRA (FEUTRA)). Furthermore, in the following description, LTE includes LTE-A, LTE-A Pro, and EUTRA, and NR includes NRAT and FEUTRA. In LTE and NR, base station equipment (base station) is also referred to as an evolved Node B (eNodeB), and terminal equipment (mobile station, mobile station device, or terminal) is also referred to as user equipment (UE). LTE and NR are cellular communication systems in which multiple areas covered by base station equipment are arranged in a cellular pattern. A single base station equipment can manage multiple cells.

[0004] As the next-generation radio access solution for LTE, NR is a radio access technology (RAT) distinct from LTE. NR is an access technology capable of handling various use cases, including enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable low-latency communication (URLLC). NR is reviewed for the purpose of corresponding to the technical framework of the use cases, request conditions, and placement scenarios in these use cases. Details of the NR scheme or request conditions are disclosed in Non-Patent Document 1.

[0005] Reference List

[0006] Non-patent literature

[0007] Non-patent document 1: 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on Scenarios and Requirements for Next Generation Access Technologies; (Release 14), 3GPP TR 38.913V0.2.0 (2016-02).

[0008] <http: / / www.3gpp.org / ftp / / Specs / archive / 38_series / 38.913 / 38913-020.zip> Summary of the Invention

[0009] Technical issues

[0010] In wireless access technologies, the parameters (physical parameters) of the transmitted signals, such as subcarrier spacing and symbol length, are preferably designed optimally according to the usage conditions. However, in the review of LTE extension technologies, from the perspective of frequency utilization efficiency, it is important for terminal devices using extension technologies to perform multiplexing with terminal devices using related LTE technologies. Therefore, backward compatibility is requested in extension technologies in LTE, and restrictions can be imposed on extension technologies. As a result, such restrictions may affect the transmission efficiency of the entire system.

[0011] This disclosure is designed in consideration of the aforementioned problems, and its purpose is to provide a base station device, terminal device, communication system, communication method, and integrated circuit that can significantly improve the transmission efficiency of the entire system by flexibly designing it according to various usage scenarios within a communication system in which the base station device and terminal device communicate.

[0012] Solution to the problem

[0013] According to this disclosure, a terminal device for communicating with a base station device is provided. The terminal device includes: a higher-layer processing unit configured to set at least one first RAT and at least one second RAT via signaling from a higher layer of the base station device; and a receiving unit configured to receive transmission signals in the first RAT and the second RAT. The transmission signals in the first RAT are mapped to resource elements configured for each subframe based on a physical parameter. The transmission signals in the second RAT are mapped to resource elements configured for each subframe based on one or more physical parameters, and are also mapped to resource elements configured based on a physical parameter among predetermined resources included in each subframe.

[0014] Furthermore, according to this disclosure, a base station apparatus for communicating with a terminal device is provided. The base station apparatus includes: a higher-layer processing unit configured to set at least one first RAT and at least one second RAT for the terminal device via higher-layer signaling; and a transmission unit configured to transmit transmission signals in the first RAT and the second RAT. The transmission signals in the first RAT are mapped to resource elements configured for each subframe based on a physical parameter. The transmission signals in the second RAT are mapped to resource elements configured for each subframe based on one or more physical parameters, and are also mapped to resource elements configured based on a physical parameter among predetermined resources included in each subframe.

[0015] Furthermore, according to this disclosure, a communication method is provided for use in a terminal device communicating with a base station device. The communication method includes the steps of: setting at least one first RAT and at least one second RAT via signaling from a higher layer of the base station device; and receiving transmission signals in the first RAT and the second RAT. The transmission signals in the first RAT are mapped to resource elements configured for each subframe based on a physical parameter. The transmission signals in the second RAT are mapped to resource elements configured for each subframe based on one or more physical parameters, and are also mapped to resource elements configured based on a physical parameter among predetermined resources included in each subframe.

[0016] Furthermore, according to this disclosure, a communication method is provided for use in a base station device communicating with a terminal device. The communication method includes: setting at least one first RAT and at least one second RAT for the terminal device via higher-layer signaling; and transmitting transmission signals in the first RAT and the second RAT. The transmission signals in the first RAT are mapped to resource elements configured for each subframe based on a physical parameter. The transmission signals in the second RAT are mapped to resource elements configured for each subframe based on one or more physical parameters, and are also mapped to resource elements configured based on a physical parameter among predetermined resources included in each subframe.

[0017] Beneficial effects of the invention

[0018] As described above, according to this disclosure, transmission efficiency can be improved in a wireless communication system in which base station devices and terminal devices communicate with each other.

[0019] It should be noted that the above effects are not necessarily limiting. Any effect described in this specification or other effects that can be understood from this specification may be achieved in addition to or in lieu of the above effects. Attached Figure Description

[0020] Figure 1This is a diagram illustrating an example of the component carrier configuration according to this embodiment.

[0021] Figure 2 This is a diagram illustrating an example of the component carrier configuration according to this embodiment.

[0022] Figure 3 This is a diagram illustrating an example of a downlink subframe of LTE according to this embodiment.

[0023] Figure 4 This is a diagram illustrating an example of an uplink subframe of LTE according to this embodiment.

[0024] Figure 5 This is a diagram illustrating an example of a set of parameters related to transmitted signals in an NR cell according to this embodiment.

[0025] Figure 6 This is a diagram illustrating an example of an NR downlink subframe in this embodiment.

[0026] Figure 7 This is a diagram illustrating an example of an NR uplink subframe in this embodiment.

[0027] Figure 8 This is a schematic block diagram illustrating the structure of the base station device in this embodiment.

[0028] Figure 9 This is a schematic block diagram illustrating the structure of the terminal device in this embodiment.

[0029] Figure 10 This is a diagram illustrating an example of LTE downlink resource element mapping according to this embodiment.

[0030] Figure 11 This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment.

[0031] Figure 12 This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment.

[0032] Figure 13 This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment.

[0033] Figure 14 This is a diagram illustrating an example of a resource element mapping method for NR according to this embodiment.

[0034] Figure 15 This is a diagram illustrating an example of a resource element mapping method for NR according to this embodiment.

[0035] Figure 16This is a block diagram illustrating a first example of a schematic structure of an eNB to which the technology according to this disclosure can be applied.

[0036] Figure 17 This is a block diagram illustrating a second example of a schematic structure of an eNB to which the technology according to this disclosure can be applied.

[0037] Figure 18 This is a block diagram illustrating an example of a schematic structure of a smartphone 900 to which the technology according to this disclosure can be applied.

[0038] Figure 19 This is a block diagram illustrating an example of a schematic structure of an automotive navigation device 920 to which the technology according to this disclosure can be applied. Detailed Implementation

[0039] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that structural elements having substantially the same function and structure are denoted by the same reference numerals in this specification and the drawings, and repeated explanations of these structural elements are omitted. Furthermore, unless specifically indicated otherwise, the techniques, functions, methods, structures, and processes described below, as well as all other descriptions, are applicable to both LTE and NR.

[0040] <Wireless communication system in this embodiment>

[0041] In this embodiment, the wireless communication system includes at least a base station device 1 and a terminal device 2. The base station device 1 can accommodate multiple terminal devices. The base station device 1 can connect to another base station device via an X2 interface. Additionally, the base station device 1 can connect to the evolved packet core (EPC) via an S1 interface. Furthermore, the base station device 1 can connect to the Mobility Management Entity (MME) via an S1-MME interface and to the Serving Gateway (S-GW) via an S1-U interface. The S1 interface supports many-to-many connections between the MME and / or the S-GW and the base station device 1. Furthermore, in this embodiment, both the base station device 1 and the terminal device 2 support LTE and / or NR.

[0042] <Example of wireless access technology according to this implementation>

[0043] In this embodiment, both base station device 1 and terminal device 2 support one or more Radio Access Technologies (RATs). For example, RATs include LTE and NR. A single RAT corresponds to a single cell (component carrier). That is, when multiple RATs are supported, each RAT corresponds to a different cell. In this embodiment, a cell is a combination of downlink resources, uplink resources, and / or sidelinks. Furthermore, in the following description, the cell corresponding to LTE is referred to as an LTE cell, and the cell corresponding to NR is referred to as an NR cell. Additionally, LTE is referred to as the first RAT, and NR is referred to as the second RAT.

[0044] Downlink communication is communication from base station device 1 to terminal device 2. Uplink communication is communication from terminal device 2 to base station device 1. Sidelink communication is communication from terminal device 2 to another terminal device 2.

[0045] Sidelink communication is defined for direct proximity detection and communication between terminal devices. It can use a frame structure similar to the uplink and downlink frame structures. Furthermore, sidelink communication can be limited to certain uplink and / or downlink resources (a subset of the uplink and / or downlink resources).

[0046] Base station device 1 and terminal device 2 are capable of supporting communication using a set of one or more cells in the downlink, uplink, and / or sidelink. A set of multiple cells is also referred to as carrier aggregation or dual connectivity. Details of carrier aggregation and dual connectivity will be described below. Additionally, each cell uses a predetermined frequency bandwidth. The maximum, minimum, and settable values ​​in the predetermined frequency bandwidth can be pre-specified.

[0047] Figure 1 This is a diagram illustrating an example of the component carrier configuration according to this embodiment. Figure 1 In the example, one LTE cell and two NR cells are configured. The LTE cell is designated as the primary cell. The two NR cells are designated as the primary secondary cell and the secondary NR cell, respectively. The two NR cells are integrated via carrier aggregation. Additionally, the LTE and NR cells are integrated via dual connectivity. It's important to note that the LTE and NR cells can be integrated via carrier aggregation. Figure 1 In the example, NR may not support some features (such as the ability to perform independent communication) because the connection can be assisted by the LTE cell acting as the primary cell. Features for performing independent communication include those required for initial connection establishment.

[0048] Figure 2 This is a diagram illustrating an example of the component carrier configuration according to this embodiment. Figure 2In the example, two NR cells are configured. These two NR cells are designated as a primary and secondary cell, respectively, and are integrated through carrier aggregation. In this case, when the NR cells support independent communication, the assistance of an LTE cell is not required. It should be noted that the two NR cells can be integrated via dual connectivity.

[0049] <Radio frame structure in this embodiment>

[0050] In this embodiment, a radio frame with a duration of 10 ms (milliseconds) is specified. Each radio frame consists of two half-frames. The time interval between the half-frames is 5 ms. Each half-frame consists of 5 subframes. The time interval between the subframes is 1 ms and is defined by two consecutive time slots. The time slot interval is 0.5 ms. The i-th subframe in a radio frame includes the (2×i)-th time slot and the (2×i+1)-th time slot. In other words, 10 subframes are specified in each radio frame.

[0051] Subframes include downlink subframes, uplink subframes, special subframes, sidelink subframes, etc.

[0052] Downlink subframes are subframes reserved for downlink transmission. Uplink subframes are subframes reserved for uplink transmission. Special subframes include three fields: Downlink Pilot Time Slot (DwPTS), Guard Time (GP), and Uplink Pilot Time Slot (UpPTS). The total length of DwPTS, GP, and UpPTS is 1 ms. DwPTS is a field reserved for downlink transmission. UpPTS is a field reserved for uplink transmission. GP is a field where neither downlink nor uplink transmission is performed. Alternatively, special subframes may include only DwPTS and GP, or only GP and UpPTS. Special subframes are arranged between downlink and uplink subframes in TDD and are used to perform handover from downlink to uplink subframes. Sidelink subframes are subframes reserved or configured for sidelink communication. Sidelinks are used for direct proximity communication and direct proximity detection between terminal devices.

[0053] A single radio frame includes downlink subframes, uplink subframes, special subframes, and / or sidelink subframes. Alternatively, a single radio frame may include only downlink subframes, uplink subframes, special subframes, or sidelink subframes.

[0054] Multiple radio frame structures are supported. The radio frame structure is specified by the frame structure type. Frame structure type 1 can be applied only to FDD. Frame structure type 2 can be applied only to TDD. Frame structure type 3 can be applied only to the operation of Licensed Assisted Access (LAA) secondary cells.

[0055] In frame structure type 2, multiple uplink-downlink structures are specified. In an uplink-downlink structure, each of the 10 subframes in a radio frame corresponds to one of the downlink subframe, uplink subframe, and special subframe. Subframes 0, 5, and DwPTS are often reserved for downlink transmission. UpPTS and the subframe immediately following the special subframe are often reserved for uplink transmission.

[0056] In frame structure type 3, 10 subframes in a radio frame are reserved for downlink transmission. Terminal device 2 treats each subframe as an empty subframe. Unless a predetermined signal, channel, and / or downlink transmission is detected in a subframe, terminal device 2 assumes that no signal and / or channel exists in the subframe. Downlink transmission is occupied only by one or more consecutive subframes. The first subframe for downlink transmission can begin from any of the subframes in the frame. The last subframe for downlink transmission can be occupied entirely by the time interval specified in the DwPTS, or only by the time interval specified in the DwPTS.

[0057] Additionally, in frame structure type 3, 10 subframes in a radio frame can be reserved for uplink transmission. Furthermore, each of the 10 subframes in a radio frame can correspond to any one of the following subframes: downlink subframe, uplink subframe, special subframe, and sidelink subframe.

[0058] Base station device 1 can transmit physical downlink channels and physical downlink signals in the DwPTS of a special subframe. Base station device 1 can restrict the transmission of PBCH in the DwPTS of a special subframe. Terminal device 2 can transmit physical uplink channels and physical uplink signals in the UpPTS of a special subframe. Terminal device 2 can restrict the transmission of some physical uplink channels and physical uplink signals in the UpPTS of a special subframe.

[0059] <LTE frame structure in this embodiment>

[0060] Figure 3 This is a diagram illustrating an example of a downlink subframe of LTE according to this embodiment. Figure 3 The diagram shown is referred to as the LTE downlink resource grid. Base station device 1 can transmit the LTE physical downlink channel and / or LTE physical downlink signal to terminal device 2 in a downlink subframe. Terminal device 2 can receive the LTE physical downlink channel and / or LTE physical downlink signal from base station device 1 in a downlink subframe.

[0061] Figure 4 This is a diagram illustrating an example of an uplink subframe of LTE according to this embodiment. Figure 4 The diagram shown is referred to as the LTE uplink resource grid. Terminal device 2 can transmit the LTE physical uplink channel and / or LTE physical uplink signal to base station device 1 in the uplink subframe. Base station device 1 can receive the LTE physical uplink channel and / or LTE physical uplink signal from terminal device 2 in the uplink subframe.

[0062] In this embodiment, LTE physical resources can be defined as follows: A time slot is defined by multiple symbols. The physical signal or physical channel transmitted in each time slot is represented by a resource grid. In the downlink, the resource grid is defined by multiple subcarriers along the frequency direction and multiple OFDM symbols along the time direction. In the uplink, the resource grid is defined by multiple subcarriers along the frequency direction and multiple SC-FDMA symbols along the time direction. The number of subcarriers or resource blocks can be determined according to the cell bandwidth. The number of symbols in a time slot is determined by the type of cyclic prefix (CP). The type of CP is normal CP or extended CP. In normal CP, the number of OFDM symbols or SC-FDMA symbols constituting a time slot is 7. In extended CP, the number of OFDM symbols or SC-FDMA symbols constituting a time slot is 6. Each element in the resource grid is called a resource element. Resource elements are identified using the subcarrier index (number) and the symbol index (number). In addition, in the description of this embodiment, OFDM symbol or SC-FDMA symbol is also simply referred to as symbol.

[0063] Resource blocks are used to map a physical channel (PDSCH, PUSCH, etc.) to resource elements. Resource blocks include virtual resource blocks and physical resource blocks. A physical channel is mapped to a virtual resource block. A virtual resource block is mapped to a physical resource block. A physical resource block is defined by a predetermined number of consecutive symbols in the time domain. A physical resource block is defined by a predetermined number of consecutive subcarriers in the frequency domain. The number of symbols and subcarriers in a physical resource block is determined based on a parameter set according to the CP type, subcarrier spacing, and / or the higher layers in the cell. For example, in the case of a normal CP type and a subcarrier spacing of 15kHz, the number of symbols in a physical resource block is 7, and the number of subcarriers is 12. In this case, a physical resource block includes (7 × 12) resource elements. Physical resource blocks are numbered starting from 0 in the frequency domain. Furthermore, two resource blocks in a subframe corresponding to the same physical resource block number are defined as a physical resource block pair (PRB pair or RB pair).

[0064] In each LTE cell, a predetermined parameter is used in a subframe. For example, the predetermined parameter is a parameter related to the transmitted signal. Parameters related to the transmitted signal include CP length, subcarrier spacing, number of symbols in a subframe (predetermined time length), number of subcarriers in a resource block (predetermined frequency band), multiple access scheme, signal waveform, etc.

[0065] In other words, in an LTE cell, each of the downlink and uplink signals is generated using a predetermined parameter over a predetermined time length (e.g., a subframe). In other words, in terminal device 2, it is assumed that each of the downlink signal to be transmitted from base station device 1 and the uplink signal to be transmitted to base station device 1 is generated using a predetermined parameter over a predetermined time length. Furthermore, base station device 1 is configured such that each of the downlink signal to be transmitted to terminal device 2 and the uplink signal to be transmitted from terminal device 2 is generated using a predetermined parameter over a predetermined time length.

[0066] <Frame structure of NR in this embodiment>

[0067] In each NR cell, one or more predetermined parameters are used within a predetermined time length (e.g., a subframe). That is, within the NR cell, each of the downlink and uplink signals is generated using one or more predetermined parameters within the predetermined time length. In other words, in terminal device 2, it is assumed that each of the downlink signal to be transmitted from base station device 1 and the uplink signal to be transmitted to base station device 1 is generated using one or more predetermined parameters within the predetermined time length. Furthermore, base station device 1 is configured such that each of the downlink signal to be transmitted to terminal device 2 and the uplink signal to be transmitted from terminal device 2 is generated using one or more predetermined parameters within the predetermined time length. When using the multiple predetermined parameters, the signals generated using the predetermined parameters are multiplexed according to a predetermined method. For example, the predetermined method includes frequency division multiplexing (FDM), time division multiplexing (TDM), code division multiplexing (CDM), and / or space division multiplexing (SDM).

[0068] In the combination of predetermined parameters set in an NR cell, multiple parameter sets can be specified in advance.

[0069] Figure 5 This is a diagram illustrating an example of a set of parameters associated with transmitted signals in an NR cell. Figure 5In the example, the parameters included in the parameter set for the transmitted signal include the subcarrier spacing, the number of subcarriers in each resource block of the NR cell, the number of symbols in each subframe, and the CP length type. The CP length type is the type of CP length used in the NR cell. For example, CP length type 1 is equivalent to the normal CP in LTE, and CP length type 2 is equivalent to the extended CP in LTE.

[0070] For both downlink and uplink, the parameter sets related to the transmitted signals in the NR cell can be specified individually. Additionally, for both downlink and uplink, the parameter sets related to the transmitted signals in the NR cell can be set independently.

[0071] Figure 6 This is a diagram illustrating an example of an NR downlink subframe in this embodiment. Figure 6 In the example, the signals generated using parameter set 1, parameter set 0, and parameter set 2 are subjected to FDM in the cell (system bandwidth). Figure 6 The diagram shown is also referred to as the NR downlink resource grid. Base station device 1 can transmit the NR physical downlink channel and / or NR physical downlink signal to terminal device 2 in a downlink subframe. Terminal device 2 can receive the NR physical downlink channel and / or NR physical downlink signal from base station device 1 in a downlink subframe.

[0072] Figure 7 This is a diagram illustrating an example of an NR uplink subframe in this embodiment. Figure 7 In the example, the signals generated using parameter set 1, parameter set 0, and parameter set 2 are subjected to FDM in the cell (system bandwidth). Figure 6 The diagram shown is also referred to as the NR uplink resource grid. Base station device 1 can transmit the NR physical uplink channel and / or NR physical uplink signal to terminal device 2 in an uplink subframe. Terminal device 2 can receive the NR physical uplink channel and / or NR physical uplink signal from base station device 1 in an uplink subframe.

[0073] <Antenna port in this embodiment>

[0074] Antenna ports are defined, allowing the propagation channel for a given symbol to be inferred from the propagation channel of another symbol transmitted in the same antenna port. For example, it can be assumed that different physical resources in the same antenna port are transmitted through the same propagation channel. In other words, for a symbol in a given antenna port, the propagation channel can be estimated and demodulated based on a reference signal in that antenna port. Furthermore, a resource grid exists for each antenna port. Antenna ports are defined by reference signals. Additionally, each reference signal can define multiple antenna ports.

[0075] Antenna ports are designated or identified using antenna port numbers. For example, antenna ports 0 through 3 are used to transmit CRS. That is, PDSCH transmitted using antenna ports 0 through 3 can be demodulated into CRS corresponding to antenna ports 0 through 3.

[0076] Two antenna ports can be considered quasi-co-location (QCL) if predetermined conditions are met. The predetermined conditions are: the wide-area characteristics of the propagation channel of symbols transmitted in one antenna port can be inferred from the propagation channel of symbols transmitted in the other antenna port. Wide-area characteristics include delay dispersion, Doppler dispersion, Doppler shift, average gain, and / or average delay.

[0077] In this embodiment, antenna port numbers can be defined differently for each RAT, or they can be defined commonly across RATs. For example, antenna ports 0 to 3 in LTE are used to transmit CRS. In NR, antenna ports 0 to 3 can be configured to transmit CRS similar to those in LTE. Additionally, in NR, antenna ports used to transmit CRS, like those in LTE, can be configured with different antenna port numbers than antenna ports 0 to 3. In this embodiment, predetermined antenna port numbers can be applied to both LTE and / or NR.

[0078] <Physical channels and physical signals in this embodiment>

[0079] In this embodiment, physical channels and physical signals are used.

[0080] Physical channels include physical downlink channels, physical uplink channels, and physical sidelink channels. Physical signals include physical downlink signals, physical uplink signals, and sidelink physical signals.

[0081] In LTE, physical channels and physical signals are referred to as LTE physical channels and LTE physical signals. In NR, physical channels and physical signals are referred to as NR physical channels and NR physical signals. LTE physical channels and NR physical channels can be defined as different physical channels. LTE physical signals and NR physical signals can be defined as different physical signals. In the description of this embodiment, LTE physical channels and NR physical channels are also simply referred to as physical channels, and LTE physical signals and NR physical signals are also simply referred to as physical signals. That is, the description of physical channels can be applied to either LTE physical channels or NR physical channels. The description of physical signals can be applied to either LTE physical signals or NR physical signals.

[0082] Physical downlink channels include Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Enhanced PDCCH (EPDCCH), Machine Type Communication (MTC) PDCCH (MTC MPDCCH), Relay PDCCH (R-PDCCH), Physical Downlink Shared Channel (PDSCH), and Physical Multicast Channel (PMCH), etc.

[0083] Physical downlink signals include synchronization signals (SS), downlink reference signals (DL-RS), and discovery signals (DS).

[0084] Synchronization signals include the primary synchronization signal (PSS) and the secondary synchronization signal (SSS).

[0085] Downlink reference signals include Cell-Specific Reference Signals (CRS), UE-Specific Reference Signals associated with the PDSCH (PDSCH-DMRS), Demodulation Reference Signals associated with the EPDCCH (EPDCCH-DMRS), Position Reference Signals (PRS), Channel State Information (CSI) Reference Signals (CSI-RS), and Tracking Reference Signals (TRS). PDSCH-DMRS is also known as the URS associated with the PDSCH, or simply URS. EPDCCH-DMRS is also known as the DMRS associated with the EPDCCH, or simply DMRS. PDSCH-DMRS and EPDCCH-DMRS are also abbreviated as DL-DMRS or Downlink Demodulation Reference Signals. CSI-RS includes Non-Zero Power CSI-RS (NZP CSI-RS). Additionally, downlink resources include Zero Power CSI-RS (ZP CSI-RS) and Channel State Information-Interference Measurement (CSI-IM).

[0086] Physical uplink channels include the Physical Uplink Shared Channel (PUSCH), the Physical Uplink Control Channel (PUCCH), and the Physical Random Access Channel (PRACH).

[0087] Physical uplink signals include the uplink reference signal (UL-RS).

[0088] Uplink reference signals include the uplink demodulation signal (UL-DMRS) and the sounding reference signal (SRS). The UL-DMRS is associated with the transmission of the PUSCH or PUCCH. The SRS is not associated with the transmission of the PUSCH or PUCCH.

[0089] Physical sidelink channels include the Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Control Channel (PSCCH), Physical Sidelink Discovery Channel (PSDCH), and Physical Sidelink Shared Channel (PSSCH).

[0090] Physical channels and physical signals are also simply referred to as channels and signals. That is, physical downlink channels, physical uplink channels, and physical sidelink channels are also referred to as downlink channels, uplink channels, and sidelink channels, respectively. Physical downlink signals, physical uplink signals, and physical sidelink signals are also referred to as downlink signals, uplink signals, and sidelink signals, respectively.

[0091] BCH, MCH, UL-SCH, and DL-SCH are transmit channels. The channels used in the Media Access Control (MAC) layer are called transmit channels. The unit of a transmit channel used in the MAC layer is also called a transmit block (TB) or MAC Protocol Data Unit (MACPDU). In the MAC layer, Hybrid Automatic Repeat Request (HARQ) control is performed for each transmit block. A transmit block is the unit of data sent (transmitted) from the MAC layer to the physical layer. In the physical layer, transmit blocks are mapped to codewords, and encoding processing is performed for each codeword.

[0092] It should be noted that the downlink reference signal and the uplink reference signal are also simply referred to as reference signals (RS).

[0093] <LTE physical channel and LTE physical signal in this embodiment>

[0094] As mentioned above, the descriptions of physical channels and physical signals can also be applied to LTE physical channels and LTE physical signals, respectively. LTE physical channels and LTE physical signals are referred to as the following terms.

[0095] The LTE physical downlink channels include LTE-PBCH, LTE-PCFICH, LTE-PHICH, LTE-PDCCH, LTE-EPDCCH, LTE-MPDCCH, LTE-R-PDCCH, LTE-PDSCH, and LTE-PMCH.

[0096] LTE physical downlink signals include LTE-SS, LTE-DL-RS, and LTE-DS. LTE-SS includes LTE-PSS and LTE-SSS. LTE-RS includes LTE-CRS, LTE-PDSCH-DMRS, LTE-EPDCCH-DMRS, LTE-RRS, LTE-CSI-RS, and LTE-TRS.

[0097] LTE physical uplink channels include LTE-PUSCH, LTE-PUCCH, LTE-PRACH, etc.

[0098] LTE physical uplink signals include LTE-UL-RS. LTE-UL-RS includes LTE-UL-DMRS, LTE-SRS, etc.

[0099] LTE physical sidelink channels include LTE-PSBCH, LTE-PSCCH, LTE-PSDCH, LTE-PSSCH, etc.

[0100] <NR physical channel and NR physical signal in this embodiment>

[0101] As mentioned above, the descriptions of physical channels and physical signals can also be applied to NR physical channels and NR physical signals, respectively. NR physical channels and NR physical signals are referred to as the following terms.

[0102] The NR physical downlink channels include NR-PBCH, NR-PCFICH, NR-PHICH, NR-PDCCH, NR-EPDCCH, NR-MPDCCH, NR-R-PDCCH, NR-PDSCH, and NR-PMCH.

[0103] NR physical downlink signals include NR-SS, NR-DL-RS, NR-DS, etc. NR-SS includes NR-PSS, NR-SSS, etc. NR-RS includes NR-CRS, NR-PDSCH-DMRS, NR-EPDCCH-DMRS, NR-PRS, NR-CSI-RS, NR-TRS, etc.

[0104] The NR physical uplink channels include NR-PUSCH, NR-PUCCH, NR-PRACH, etc.

[0105] The NR physical uplink signal includes NR-UL-RS. NR-UL-RS includes NR-UL-DMRS, NR-SRS, etc.

[0106] NR physical sidelink channels include NR-PSBCH, NR-PSCCH, NR-PSDCH, NR-PSSCH, etc.

[0107] <Physical downlink channel in this embodiment>

[0108] The PBCH is used to broadcast the Master Information Block (MIB), which is broadcast information dedicated to the serving cell of base station device 1. The PBCH is transmitted only through subframe 0 of a radio frame. The MIB can be updated at 40ms intervals. The PBCH is transmitted repeatedly at 10ms intervals. Specifically, the initial transmission of the MIB is performed in subframe 0 of a radio frame that satisfies the condition that the remainder obtained by dividing the System Frame Number (SFN) by 4 is 0, and the MIB is retransmitted (repeated) in subframe 0 of all other radio frames. SFN is the radio frame number (system frame number). MIB is system information. For example, the MIB includes information indicating the SFN.

[0109] PCFICH is used to transmit information related to the number of OFDM symbols used for PDCCH transmission. The area indicated by PCFICH is also called the PDCCH area. The information transmitted via PCFICH is also called the Control Format Indicator (CFI).

[0110] PHICH is used to send HARQ-ACKs (HARQ indicator, HARQ feedback, and response information) indicating acknowledgment (ACK) or denial (NACK) of uplink data (Uplink Shared Channel (UL-SCH)) received by base station device 1. For example, if a HARQ-ACK indicating ACK is received, the corresponding uplink data is not retransmitted. For example, if terminal device 2 receives a HARQ-ACK indicating NACK, terminal device 2 retransmits the corresponding uplink data through a predetermined uplink subframe. A PHICH sends a HARQ-ACK for a specific uplink data. Base station device 1 uses multiple PHICHs to send each HARQ-ACK to multiple uplink data items included in the same PUSCH.

[0111] PDCCH and EPDCCH are used to transmit downlink control information (DCI). The mapping of information bits in the downlink control information is defined by the DCI format. Downlink control information includes downlink grants and uplink grants. Downlink grants are also known as downlink dispatch or downlink allocation.

[0112] The PDCCH is transmitted by one or more consecutive control channel elements (CCEs). Each CCE consists of 9 resource element groups (REGs). Each REG consists of 4 resource elements. When the PDCCH consists of n consecutive CCEs, the PDCCH begins with a CCE that satisfies the following condition: the remainder after dividing the index (number) i of the CCE by n is 0.

[0113] The EPDCCH is transmitted by one or more consecutive Enhanced Control Channel Elements (ECCEs) in a set. Each ECCE consists of multiple Enhanced Resource Element Groups (EREGs).

[0114] Downlink permission is used for scheduling PDSCHs within a cell. Downlink permission is used for scheduling PDSCHs in the same subframe as the subframe that sent the downlink permission. Uplink permission is used for scheduling PUSCHs within a cell. Uplink permission is used for scheduling a single PUSCH in the fourth subframe or a subframe following the one that sent the uplink permission.

[0115] Cyclic Redundancy Check (CRC) parity bits are added to the DCI. The CRC parity bits are scrambled using a Radio Network Temporary Identifier (RNTI). An RNTI is an identifier that can be specified or set according to the purpose of the DCI, etc. An RNTI can be an identifier pre-specified in the specification, an identifier set to be specific to cell information, an identifier set to be specific to terminal device 2 information, or an identifier set to be specific to the group to which terminal device 2 belongs. For example, when monitoring the PDCCH or EPDCCH, terminal device 2 uses a predetermined RNTI to descramble the CRC parity bits added to the DCI and identifies whether the CRC is correct. If the CRC is correct, the DCI is understood to be for terminal device 2.

[0116] The PDSCH is used to transmit downlink data (Downlink Shared Channel (DL-SCH)). Additionally, the PDSCH is also used to transmit higher-layer control information.

[0117] PMCH is used to send multicast data (Multicast Channel (MCH)).

[0118] In the PDCCH area, multiple PDCCHs can be multiplexed based on frequency, time, and / or space. In the EPDCCH area, multiple EPDCCHs can be multiplexed based on frequency, time, and / or space. In the PDSCH area, multiple PDSCHs can be multiplexed based on frequency, time, and / or space. PDCCH, PDSCH, and / or EPDCCH can be multiplexed based on frequency, time, and / or space.

[0119] <Physical downlink signal in this embodiment>

[0120] Synchronization signals are used by terminal device 2 to obtain downlink synchronization in the frequency and / or time domains. Synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). Synchronization signals are placed in predetermined subframes within a radio frame. For example, in a TDD scheme, the synchronization signals are placed in subframes 0, 1, 5, and 6 of the radio frame. In an FDD scheme, the synchronization signals are placed in subframes 0 and 5 of the radio frame.

[0121] PSS can be used for coarse frame / timing synchronization (synchronization in the time domain) or cell group identification. SSS can be used for more accurate frame timing synchronization or cell identification. In other words, PSS and SSS can be used to perform frame timing synchronization and cell identification.

[0122] The downlink reference signal is used by terminal device 2 to perform propagation path estimation, propagation path correction, calculation of downlink channel state information (CSI), and / or measurement of the location of terminal device 2.

[0123] The CRS is transmitted across the entire frequency band of the subframe. The CRS is used to receive (demodulate) the PBCH, PDCCH, PHICH, PCFICH, and PDSCH. The CRS can be used by terminal device 2 to calculate downlink channel state information. The PBCH, PDCCH, PHICH, and PCFICH are transmitted through the antenna ports used for CRS transmission. The CRS supports 1, 2, or 4 antenna port configurations. The CRS is transmitted through one or more antenna ports from 0 to 3.

[0124] The URS associated with the PDSCH is transmitted via a subframe and frequency band used for transmitting the PDSCH associated with the URS. The URS is used for demodulating the PDSCH associated with the URS. The URS associated with the PDSCH is transmitted via antenna ports 5 and 7 through 14.

[0125] PDSCH is transmitted through the antenna port used for CRS or URS transmission based on the transmission mode and DCI format. DCI format 1A is used for scheduling PDSCH transmitted through the antenna port used for CRS transmission. DCI format 2D is used for scheduling PDSCH transmitted through the antenna port used for URS transmission.

[0126] The DMRS associated with the EPDCCH is transmitted via a subframe and frequency band used for the transmission of the EPDCCH associated with the DMRS. The DMRS is used for demodulation of the EPDCCH associated with the DMRS. The EPDCCH is transmitted via an antenna port used for the transmission of the DMRS. The DMRS associated with the EPDCCH is transmitted via one or more antenna ports from antenna ports 107 to 114.

[0127] CSI-RS is sent via the configured subframe.

[0128] The resources for transmitting CSI-RS are configured by base station device 1. CSI-RS is used by terminal device 2 to calculate downlink channel state information. Terminal device 2 uses CSI-RS to perform signal measurements (channel measurements). CSI-RS supports the configuration of some or all of antenna ports 1, 2, 4, 8, 12, 16, 24, and 32. CSI-RS is transmitted through one or more antenna ports 15 to 46. Additionally, the antenna ports to be supported can be determined based on the terminal device capabilities of terminal device 2, the setting of RRC parameters, and / or the transmission mode to be configured.

[0129] The resources for ZP CSI-RS are configured by higher layers. The resources for ZP CSI-RS are transmitted using zero output power. In other words, the resources for ZP CSI-RS are not transmitted. ZP PDSCH and EPDCCH are not transmitted in the configuration of the ZP CSI-RS resources. For example, the resources for ZP CSI-RS are used for neighboring cells to transmit NZP CSI-RS. Additionally, for example, the resources for ZP CSI-RS are used for measuring CSI-IM. Furthermore, for example, the resources for ZP CSI-RS do not transmit predetermined channels (such as PDSCH). In other words, in addition to the resources for ZP CSI-RS, the predetermined channels are mapped (for rate matching or puncturing).

[0130] The resources for CSI-IM are set by base station device 1. CSI-IM resources are used to measure interference in CSI measurements. CSI-IM resources can be configured to overlap with some resources of ZP CSI-RS. For example, when CSI-IM resources are configured to overlap with some resources of ZP CSI-RS, signals from the cell performing CSI measurements are not transmitted in those resources. In other words, base station device 1 does not transmit PDSCH, EPDCCH, etc., in the resources set by CSI-IM. Therefore, terminal device 2 can efficiently perform CSI measurements.

[0131] MBSFN RS is transmitted throughout the entire frequency band of the subframe used for PMCH transmission. MBSFN RS is used for PMCH demodulation. PMCH is transmitted through the antenna port used for MBSFN RS transmission. MBSFN RS is transmitted through antenna port 4.

[0132] PRS is used in terminal device 2 to measure the location of terminal device 2. PRS is transmitted through antenna port 6.

[0133] TRS can be mapped to only predetermined subframes. For example, TRS can be mapped to subframes 0 and 5. Furthermore, TRS can use a structure similar to or partially similar to CRS. For example, within each resource block, the location of the resource element to which TRS is mapped can be consistent with the location of the resource element to which CRS is mapped at antenna port 0. Additionally, the sequence (value) for TRS can be determined based on information set via PBCH, PDCCH, EPDCCH, or PDSCH (RRC signaling). The sequence (value) for TRS can be determined based on parameters such as cell ID (e.g., physical layer cell identifier), slot number, etc. The sequence (value) for TRS can be determined using a different method (formula) than that used for the sequence (value) for CRS at antenna port 0.

[0134] <Physical uplink signal in this embodiment>

[0135] PUCCH is the physical channel used to transmit uplink control information (UCI). Uplink control information includes downlink channel state information (CSI), scheduling requests (SRs) indicating a request for PUCCH resources, and HARQ-ACKs for downlink data (transmit blocks (TB) or downlink-shared channel (DL-SCH)). HARQ-ACKs are also known as ACK / NACKs, HARQ feedback, or response information. Additionally, HARQ-ACKs for downlink data indicate ACK, NACK, or DTX.

[0136] The PUSCH is the physical channel used to transmit uplink data (Uplink-Shared Channel (UL-SCH)). Additionally, the PUSCH can be used to transmit HARQ-ACK and / or channel state information along with uplink data. Alternatively, the PUSCH can be used to transmit only channel state information or only HARQ-ACK and channel state information.

[0137] PRACH is a physical channel used to transmit random access preambles. PRACH can be used by terminal device 2 to achieve synchronization with base station device 1 in the time domain. In addition, PRACH is also used to indicate the initial connection establishment process (processing), handover process, connection re-establishment process, synchronization (timing adjustment) for uplink transmission, and / or requests for PUSCH resources.

[0138] In the PUCCH area, multiple PUCCHs are multiplexed by frequency, time, space, and / or code. In the PUSCH area, multiple PUSCHs can be multiplexed by frequency, time, space, and / or code. PUCCH and PUSCH can be multiplexed by frequency, time, space, and / or code. PRACH can be placed on a single subframe or two subframes. Multiple PRACHs can be multiplexed by code.

[0139] <Physical uplink signal in this embodiment>

[0140] The uplink DMRS is associated with the transmission of PUSCH or PUCCH. The DMRS is time-multiplexed with the PUSCH or PUCCH. Base station device 1 can use the DMRS to perform propagation path correction for the PUSCH or PUCCH. In this embodiment, the transmission of PUSCH also includes multiplexing and transmitting the PUSCH and DMRS. In this embodiment, the transmission of PUCCH also includes multiplexing and transmitting the PUCCH and DMRS. Additionally, the uplink DMRS is also referred to as UL-DMRS. The SRS is not associated with the transmission of PUSCH or PUCCH. Base station device 1 can use the SRS to measure the uplink channel state.

[0141] SRS is transmitted using the last SC-FDMA symbol in the uplink subframe. In other words, SRS is placed in the last SC-FDMA symbol in the uplink subframe. Terminal device 2 can restrict the simultaneous transmission of SRS, PUCCH, PUSCH, and / or PRACH in a certain SC-FDMA symbol of a certain cell. Terminal device 2 can transmit PUSCH and / or PUCCH in a certain uplink subframe of a certain cell using SC-FDMA symbols excluding the last SC-FDMA symbol, and transmit SRS using the last SC-FDMA symbol in the uplink subframe. In other words, terminal device 2 can transmit SRS, PUSCH, and PUCCH in a certain uplink subframe of a certain cell.

[0142] In SRS, trigger type 0SRS and trigger type 1SRS are defined as SRSs with different trigger types. Trigger type 0SRS is transmitted when the parameters associated with trigger type 0SRS are set by higher-layer signaling. Trigger type 1SRS is transmitted when the parameters associated with trigger type 1SRS are set by higher-layer signaling, and is requested to be transmitted via an SRS request included in DCI format 0, 1A, 2B, 2C, 2D, or 4. Furthermore, for DCI formats 0, 1A, or 4, the SRS request is included in both FDD and TDD, while for DCI formats 2B, 2C, or 2D, the SRS request is only included in TDD. If the transmission of trigger type 0SRS and trigger type 1SRS occurs in the same subframe of the same serving cell, priority is given to the transmission of trigger type 1SRS.

[0143] <Physical resources used for the control channel in this embodiment>

[0144] Resource element groups (REGs) are used to define the mapping between resource elements and control channels. For example, REGs are used for mapping PDCCH, PHICH, or PCFICH. A REG consists of four consecutive resource elements located in the same OFDM symbol and not used in the same resource block's CRS. Additionally, a REG consists of the first to fourth OFDM symbols in the first time slot of a subframe.

[0145] Enhanced Resource Element Groups (EREGs) are used to define the mapping between resource elements and enhanced control channels. For example, EREGs are used for mapping EPDCCH. A resource block pair consists of 16 EREGs. For each resource block pair, each EREG is assigned a number from 0 to 15. Each EREG consists of 9 resource elements, excluding the resource elements in a resource block pair used for DM-RS associated with EPDCCH.

[0146] <Structural Example of Base Station Device 1 in this Embodiment>

[0147] Figure 8 This is a schematic block diagram illustrating the structure of the base station device 1 in this embodiment. For example... Figure 3 As shown, the base station device 1 includes a high-layer processing unit 101, a control unit 103, a receiving unit 105, a transmitting unit 107, and a transceiver antenna 109. Furthermore, the receiving unit 105 includes a decoding unit 1051, a demodulation unit 1053, a demultiplexing unit 1055, a wireless receiving unit 1057, and a channel measurement unit 1059. Additionally, the transmitting unit 107 includes an encoding unit 1071, a modulation unit 1073, a multiplexing unit 1075, a wireless transmitting unit 1077, and a downlink reference signal generation unit 1079.

[0148] As described above, base station device 1 can support one or more RATs. Figure 8 Some or all of the units included in the base station apparatus 1 shown can be individually configured according to the RAT. For example, the receiving unit 105 and the transmitting unit 107 are individually configured in LTE and NR. Additionally, in an NR cell, Figure 8 Some or all of the units included in the base station apparatus 1 shown can be individually configured according to a set of parameters related to the transmitted signal. For example, in a certain NR cell, the radio receiving unit 1057 and the radio transmitting unit 1077 can be individually configured according to a set of parameters related to the transmitted signal.

[0149] The higher-layer processing unit 101 performs processing at the Media Access Control (MAC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and Radio Resource Control (RRC) layer. Additionally, the higher-layer processing unit 101 generates control information for controlling the receiving unit 105 and the transmitting unit 107, and outputs the control information to the control unit 103.

[0150] The control unit 103 controls the receiving unit 105 and the transmitting unit 107 based on control information from the higher-layer processing unit 101. The control unit 103 generates control information to be sent to the higher-layer processing unit 101 and outputs the control information to the higher-layer processing unit 101. The control unit 103 receives a decoded signal from the decoding unit 1051 and receives a channel estimation result from the channel measurement unit 1059. The control unit 103 outputs the signal to be encoded to the encoding unit 1071. Furthermore, the control unit 103 is used to control all or part of the base station device 1.

[0151] The high-level processing unit 101 performs processing and management related to RAT control, radio resource control, subframe setting, scheduling control and / or CSI report control.

[0152] The processing and management in the higher-layer processing unit 101 are performed jointly for each terminal device or for terminal devices connected to the base station device. The processing and management in the higher-layer processing unit 101 may be performed solely by the higher-layer processing unit 101, or may be obtained from a higher node or another base station device. Alternatively, the processing and management in the higher-layer processing unit 101 may be performed individually according to the RAT. For example, the higher-layer processing unit 101 individually performs processing and management in LTE and processing and management in NR.

[0153] Under the RAT control of the higher-level processing unit 101, RAT-related management is performed. For example, under RAT control, LTE-related management and / or NR-related management are performed. NR-related management includes the setting and processing of parameter sets related to transmitted signals in NR cells.

[0154] In the radio resource control within the higher-layer processing unit 101, the generation and / or management of downlink data (transmit blocks), system information, RRC messages (RRC parameters), and / or MAC control elements (CE) are performed.

[0155] In the subframe settings of the higher-layer processing unit 101, management is performed on subframe settings, subframe mode settings, uplink-downlink settings, uplink reference UL-DL settings, and / or downlink reference UL-DL settings. Furthermore, the subframe settings in the higher-layer processing unit 101 are also referred to as base station subframe settings. Additionally, the subframe settings in the higher-layer processing unit 101 can be determined based on uplink and downlink traffic. Furthermore, the subframe settings in the higher-layer processing unit 101 can be determined based on the scheduling results of the scheduling control within the higher-layer processing unit 101.

[0156] In the scheduling control within the higher-layer processing unit 101, the frequency and subframes, coding rate, modulation scheme, and transmit power of the physical channel are determined based on the channel state information, estimates, and channel quality received from the propagation path input from the channel measurement unit 1059, etc. For example, the control unit 103 generates control information (DCI format) based on the scheduling results of the scheduling control in the higher-layer processing unit 101.

[0157] In the CSI report control within the high-level processing unit 101, the CSI reports of the terminal device 2 are controlled. For example, settings related to CSI reference resources used to calculate CSI in the terminal device 2 are controlled.

[0158] Under the control of the control unit 103, the receiving unit 105 receives signals transmitted from the terminal device 2 via the transceiver antenna 109, performs reception processing (such as demultiplexing, demodulation, and decoding), and outputs the processed information to the control unit 103. Furthermore, the reception processing in the receiving unit 105 is performed based on pre-specified settings or settings notified from the base station device 1 to the terminal device 2.

[0159] The wireless receiving unit 1057 performs the following functions: conversion to intermediate frequency (down-conversion), removal of unwanted frequency components, control of amplification level to maintain the signal level appropriately, quadrature demodulation based on the in-phase and quadrature components of the received signal, conversion from analog to digital signal, removal of guard interval (GI), and / or extraction of the signal in the frequency domain by performing a fast Fourier transform (FFT) on the uplink signal received by the transceiver antenna 109.

[0160] Demultiplexing unit 1055 separates the uplink channel (such as PUCCH or PUSCH) and / or uplink reference signal from the signal input from wireless receiving unit 1057. Demultiplexing unit 1055 outputs the uplink reference signal to channel measurement unit 1059. Demultiplexing unit 1055 compensates for the propagation path of the uplink channel from the propagation path estimate input from channel measurement unit 1059.

[0161] The demodulation unit 1053 uses a modulation scheme (such as binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64QAM, or 256QAM) to demodulate the received signal of the modulated symbols of the uplink channel. The demodulation unit 1053 performs the separation and demodulation of the MIMO multiplexed uplink channel.

[0162] Decoding unit 1051 performs decoding processing on the coded bits of the demodulated uplink channel. The decoded uplink data and / or uplink control information are output to control unit 103. Decoding unit 1051 performs decoding processing on the PUSCH of each transmit block.

[0163] The channel measurement unit 1059 measures the propagation path estimate, channel quality, etc., from the uplink reference signal input from the demultiplexing unit 1055, and outputs the propagation path estimate, channel quality, etc., to the demultiplexing unit 1055 and / or the control unit 103. For example, it measures the propagation path estimate for propagation path compensation for PUCCH or PUSCH using UL-DMRS, and measures the uplink channel quality using SRS.

[0164] Under the control of the control unit 103, the transmitting unit 107 performs transmission processing (such as encoding, modulation, and multiplexing) on ​​the downlink control information and downlink data input from the higher-layer processing unit 101. For example, the transmitting unit 107 generates and multiplexes the PHICH, PDCCH, EPDCCH, PDSCH, and downlink reference signal, and generates a transmission signal. Furthermore, the transmission processing in the transmitting unit 107 is performed based on pre-specified settings, settings notified from the base station device 1 to the terminal device 2, or settings notified via PDCCH or EPDCCH transmitted through the same subframe.

[0165] Encoding unit 1071 encodes the HARQ indicator (HARQ-ACK), downlink control information, and downlink data input from control unit 103 using a predetermined encoding scheme (such as block coding, convolutional coding, turbo coding, etc.). Modulation unit 1073 modulates the coded bits input from encoding unit 1071 using a predetermined modulation scheme (such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM). Downlink reference signal generation unit 1079 generates a downlink reference signal based on physical cell identification (PCI), RRC parameters set in terminal device 2, etc. Multiplexing unit 1075 multiplexes the modulation symbols and the downlink reference signal for each channel, and arranges the obtained data in predetermined resource elements.

[0166] The wireless transmitting unit 1077 performs processes such as signal conversion to the time domain via inverse fast Fourier transform (IFFT), adding guard intervals, generating baseband digital signals, analog signal conversion, quadrature modulation, conversion from intermediate frequency to high frequency signals (upconversion), removal of extra frequency components, and power amplification of the signal from the multiplexing unit 1075, and generates a transmit signal. The transmit signal output from the wireless transmitting unit 1077 is transmitted via the transceiver antenna 109.

[0167] <Structural Example of Base Station Device 1 in this Embodiment>

[0168] Figure 9 This is a schematic block diagram illustrating the structure of the terminal device 2 in this embodiment. For example... Figure 4 As shown, terminal device 2 includes a high-layer processing unit 201, a control unit 203, a receiving unit 205, a transmitting unit 207, and a transceiver antenna 209. Furthermore, the receiving unit 205 includes a decoding unit 2051, a demodulation unit 2053, a demultiplexing unit 2055, a wireless receiving unit 2057, and a channel measurement unit 2059. Additionally, the transmitting unit 207 includes an encoding unit 2071, a modulation unit 2073, a multiplexing unit 2075, a wireless transmitting unit 2077, and an uplink reference signal generation unit 2079.

[0169] As described above, terminal device 2 can support one or more RATs. Figure 9 Some or all of the units included in terminal device 2 shown can be individually configured according to RAT. For example, receiving unit 205 and transmitting unit 207 are individually configured in LTE and NR. Additionally, in NR cells, Figure 9 Some or all of the units included in the terminal device 2 shown can be individually configured according to a set of parameters related to the transmitted signal. For example, in an NR cell, the radio receiving unit 2057 and the radio transmitting unit 2077 can be individually configured according to a set of parameters related to the transmitted signal.

[0170] The higher-layer processing unit 201 outputs uplink data (transmit blocks) to the control unit 203. The higher-layer processing unit 201 performs processing at the Media Access Control (MAC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and Radio Resource Control (RRC) layer. Additionally, the higher-layer processing unit 201 generates control information for controlling the receiving unit 205 and the transmitting unit 207, and outputs this control information to the control unit 203.

[0171] Based on control information from the higher-level processing unit 201, the control unit 203 controls the receiving unit 205 and the transmitting unit 207 to generate control information to be sent to the higher-level processing unit 201, and outputs the control information to the higher-level processing unit 201. The control unit 203 receives a decoded signal from the decoding unit 2051 and a channel estimation result from the channel measurement unit 2059. The control unit 203 outputs the signal to be encoded to the encoding unit 2071. Furthermore, the control unit 203 can be used to control all or part of the terminal device 2.

[0172] The higher-layer processing unit 201 performs processing and management related to RAT control, radio resource control, subframe setting, scheduling control, and / or CSI reporting control. The processing and management in the higher-layer processing unit 201 are performed based on pre-specified settings and / or settings based on control information set or notified from the base station device 1. For example, control information from the base station device 1 includes RRC parameters, MAC control elements, or DCI. Furthermore, the processing and management in the higher-layer processing unit 201 can be performed individually according to the RAT. For example, the higher-layer processing unit 201 individually performs processing and management in LTE and NR.

[0173] Under the RAT control of the higher-level processing unit 201, RAT-related management is performed. For example, under RAT control, LTE-related management and / or NR-related management are performed. NR-related management includes the setting and processing of parameter sets related to transmitted signals in NR cells.

[0174] In the radio resource control within the higher-layer processing unit 201, the configuration information in the terminal device 2 is managed. In the radio resource control within the higher-layer processing unit 201, the generation and / or management of uplink data (transmit blocks), system information, RRC messages (RRC parameters), and / or MAC control elements (CE) are performed.

[0175] The subframe settings in the higher-layer processing unit 201 manage the subframe settings in base station device 1 and / or base station devices different from base station device 1. Subframe settings include uplink or downlink settings, subframe mode settings, uplink-downlink settings, uplink reference UL-DL settings, and / or downlink reference UL-DL settings. Furthermore, the subframe settings in the higher-layer processing unit 201 are also referred to as terminal subframe settings.

[0176] In the scheduling control of the high-layer processing unit 201, control information for controlling the scheduling on the receiving unit 205 and the transmitting unit 207 is generated based on the DCI (scheduling information) from the base station device 1.

[0177] In the CSI reporting control within the higher-layer processing unit 201, control related to reporting CSI for the base station device 1 is executed. For example, in the CSI reporting control, settings related to CSI reference resources used by the channel measurement unit 2059 to calculate the CSI are controlled. In the CSI reporting control, resources (timing) used for reporting CSI are controlled based on DCI and / or RRC parameters.

[0178] Under the control of the control unit 203, the receiving unit 205 receives signals transmitted from the base station device 1 via the transceiver antenna 209, performs reception processing (such as demultiplexing, demodulation, and decoding), and outputs the processed information to the control unit 203. Additionally, the reception processing in the receiving unit 205 is performed based on pre-specified settings or notifications or settings from the base station device 1.

[0179] The wireless receiving unit 2057 performs the following functions: conversion to intermediate frequency (down-conversion), removal of unwanted frequency components, control of amplification level to maintain the signal level appropriately, quadrature demodulation based on the in-phase and quadrature components of the received signal, conversion from analog to digital signal, removal of guard interval (GI), and / or extraction of the signal in the frequency domain by performing a fast Fourier transform (FFT) on the uplink signal received by the transceiver antenna 209.

[0180] Demultiplexing unit 2055 separates the downlink channel (such as PHICH, PDCCH, EPDCCH, or PDSCH), downlink synchronization signal, and / or downlink reference signal from the signal input from radio receiving unit 2057. Demultiplexing unit 2055 outputs uplink reference signal to channel measurement unit 2059. Demultiplexing unit 2055 compensates for the propagation path of the uplink channel from the propagation path estimate input from channel measurement unit 2059.

[0181] The demodulation unit 2053 uses a modulation scheme (such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM) to demodulate the received signal of the modulated symbols of the downlink channel. The demodulation unit 2053 performs the separation and demodulation of the MIMO multiplexed downlink channel.

[0182] Decoding unit 2051 performs decoding processing on the coded bits of the demodulated downlink channel. The decoded downlink data and / or downlink control information are output to control unit 203. Decoding unit 2051 performs decoding processing on the PDSCH of each transmit block.

[0183] The channel measurement unit 2059 measures the estimated propagation path, channel quality, etc., from the downlink reference signal input from the demultiplexing unit 2055, and outputs the estimated propagation path, channel quality, etc., to the demultiplexing unit 2055 and / or the control unit 203. The downlink reference signal used for the measurements performed by the channel measurement unit 2059 can be determined based on at least one transmission mode set by RRC parameters and / or other RRC parameters. For example, the estimated propagation path used for propagation path compensation of the PDSCH or EPDCCH is measured via DL-DMRS. The estimated propagation path used for propagation path compensation of the PDCCH or PDSCH and / or the downlink channel used for reporting CSI is measured via CRS. The downlink channel used for reporting CSI is measured via CSI-RS. The channel measurement unit 2059 calculates the reference signal received power (RSRP) and / or reference signal received quality (RSRQ) based on CRS, CSI-RS, or the discovery signal, and outputs the RSRP and / or RSRQ to the higher layer processing unit 201.

[0184] Under the control of the control unit 203, the transmitting unit 207 performs transmission processing (such as encoding, modulation, and multiplexing) on ​​the uplink control information and uplink data input from the higher-layer processing unit 201. For example, the transmitting unit 207 generates and multiplexes uplink channels (such as PUSCH or PUCCH) and / or uplink reference signals, and generates a transmission signal. In addition, the transmission processing in the transmitting unit 207 is performed based on pre-specified settings or settings set or notified by the base station device 1.

[0185] Encoding unit 2071 encodes the HARQ indicator (HARQ-ACK), uplink control information, and uplink data input from control unit 203 using a predetermined encoding scheme (such as block coding, convolutional coding, turbo coding, etc.). Modulation unit 2073 modulates the coded bits input from encoding unit 2071 using a predetermined modulation scheme (such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM). Uplink reference signal generation unit 2079 generates an uplink reference signal based on RRC parameters, etc., set in terminal device 2. Multiplexing unit 2075 multiplexes the modulation symbols and the uplink reference signal for each channel, and arranges the obtained data in predetermined resource elements.

[0186] The wireless transmitting unit 2077 performs processes such as signal conversion to the time domain via inverse fast Fourier transform (IFFT), adding guard intervals, generating baseband digital signals, analog signal conversion, quadrature modulation, conversion from intermediate frequency to high frequency signals (upconversion), removal of extra frequency components, and power amplification of the signal from the multiplexing unit 2075, and generates a transmitted signal. The transmitted signal output from the wireless transmitting unit 2077 is transmitted via the transceiver antenna 209.

[0187] <Signaling of control information in this embodiment>

[0188] Base station device 1 and terminal device 2 can use various methods for signaling (notification, broadcast, or setting) for control information. Signaling for control information can be executed at various layers. Control information signaling includes: physical layer signaling, which is executed through the physical layer; RRC signaling, which is executed through the RRC layer; and MAC signaling, which is executed through the MAC layer. RRC signaling is dedicated RRC signaling used to notify terminal device 2 of specific control information or common RRC signaling used to notify control information dedicated to base station device 1. Signaling used by layers higher than the physical layer (such as RRC signaling and MAC signaling) is also referred to as higher-layer signaling.

[0189] RRC signaling is implemented by transmitting RRC parameters. MAC signaling is implemented by transmitting MAC control elements. Physical layer signaling is implemented by transmitting Downlink Control Information (DCI) or Uplink Control Information (UCI). RRC parameters and MAC control elements are sent using PDSCH or PUSC. DCI is sent using PDCCH or EPDCCH. UCI is sent using PUCCH or PUSCH. RRC and MAC signaling are used to transmit semi-static control information and are also known as semi-static signaling. Physical layer signaling is used to transmit dynamic control information and is also known as dynamic signaling. DCI is used for PDSCH scheduling or PUSCH scheduling. UCI is used for CSI reports, HARQ-ACK reports, and / or scheduling requests (SR).

[0190] <Details of the downlink control information in this embodiment>

[0191] The DCI is notified using a DCI format with pre-specified fields. Predefined information bits are mapped to fields specified in the DCI format. The DCI notifies downlink scheduling information, uplink scheduling information, sidelink scheduling information, requests for aperiodic CSI reports, or uplink transmit power commands.

[0192] The DCI format monitored by terminal device 2 is determined based on the transmission mode set for each serving cell. In other words, a portion of the DCI format monitored by terminal device 2 can differ depending on the transmission mode. For example, terminal device 2 with downlink transmission mode 1 monitors DCI format 1A and DCI format 1. For example, terminal device 2 with downlink transmission mode 4 monitors DCI format 1A and DCI format 2. For example, terminal device 2 with uplink transmission mode 1 monitors DCI format 0. For example, terminal device 2 with uplink transmission mode 2 monitors DCI format 0 and DCI format 4.

[0193] The control area where the PDCCH used to notify the terminal device 2 of the DCI is located has not been notified, and the terminal device 2 detects the DCI for the terminal device 2 through blind decoding (blind detection). Specifically, the terminal device 2 monitors a set of candidate PDCCHs in the serving cell. The monitoring instruction is: for each PDCCH in the set, attempt to decode it according to all DCI formats to be monitored. For example, the terminal device 2 attempts to decode all aggregation levels, candidate PDCCHs, and DCI formats that may be sent to the terminal device 2. The terminal device 2 identifies the successfully decoded (detected) DCI (PDCCH) as the DCI (PDCCH) for the terminal device 2.

[0194] Cyclic Redundancy Check (CRC) is added to the DCI. CRC is used for DCI error detection and blind DCI detection. The CRC parity bit is scrambled using RNTI. Terminal device 2 detects whether it is a DCI for terminal device 2 based on RNTI. Specifically, terminal device 2 uses a predetermined RNTI to descramble the bits corresponding to the CRC, extracts the CRC, and checks whether the corresponding DCI is correct.

[0195] RNTIs are specified or set according to the purpose or use of the DCI. RNTIs include cell-RNTI (C-RNTI), semi-permanent scheduling-RNTI (SPS C-RNTI), system information-RNTI (SI-RNTI), paging-RNTI (P-RNTI), random access-RNTI (RA-RNTI), transmit power control-PUCCH-RNTI (TPC-PUCCH-RNTI), transmit power control-PUSCH-RNTI (TPC-PUSCH-RNTI), temporary C-RNTI, multimedia broadcast multicast service (MBMS)-RNTI (M-RNTI), and eIMTA-RNTI.

[0196] C-RNTI and SPS C-RNTI are dedicated RNTIs for terminal device 2 within base station device 1 (cell) and serve as identifiers for terminal device 2. C-RNTI is used to schedule PDSCH or PUSCH within a subframe. SPS C-RNTI is used to activate or deactivate periodic scheduling of resources for PDSCH or PUSCH. A control channel with a CRC using SI-RNTI scrambling is used to schedule System Information Blocks (SIBs). A control channel with a CRC using P-RNTI scrambling is used to control paging. A control channel with a CRC using RA-RNTI scrambling is used to schedule responses to RACH. A control channel with a CRC using TPC-PUCCH-RNTI scrambling is used for PUCCH power control. A control channel with a CRC using TPC-PUSCH-RNTI scrambling is used for PUSCH power control. A control channel with a CRC using temporary C-RNTI scrambling is used by mobile station devices that have not set or identified C-RNTI. A control channel with a CRC using M-RNTI scrambling is used to schedule MBMS. The control channel with CRC using eIMTA-RNTI scrambling is used to notify information related to the TDD UL / DL settings of the TDD serving cell in Dynamic TDD (eIMTA). Alternatively, a new RNTI can be used to scramble the DCI format instead of the aforementioned RNTI.

[0197] Scheduling information (downlink scheduling information, uplink scheduling information, and sidelink scheduling information) includes information for scheduling in units of resource blocks or resource block groups as frequency area scheduling. A resource block group is a contiguous set of resource blocks and indicates the resources allocated to the terminal devices being scheduled. The size of the resource block group is determined by the system bandwidth.

[0198] <Details of the downlink control channel in this embodiment>

[0199] The DCI is transmitted using a control channel (such as PDCCH or EPDCCH). Terminal device 2 monitors a set of candidate PDCCHs and / or a set of candidate EPDCCHs for one or more active serving cells set by RRC signaling. Here, monitoring means attempting to decode the PDCCHs and / or EPDCCHs in the set corresponding to all DCI formats to be monitored.

[0200] A set of candidate PDCCHs or a set of candidate EPDCCHs is also referred to as a search space. Within the search space, a shared search space (CSS) and a terminal-specific search space (USS) are defined. A CSS can be defined only for the search space of the PDCCHs.

[0201] The common search space (CSS) is a search space based on parameters dedicated to base station device 1 and / or pre-specified parameter settings. For example, the CSS is a search space shared by multiple terminal devices. Therefore, base station device 1 maps control channels shared by multiple terminal devices to the CSS, and thus reduces the resources used for transmitting control channels.

[0202] The UE-dedicated search space (USS) is a search space configured using at least one parameter specifically for terminal device 2. Therefore, the USS is a search space dedicated to terminal device 2, and control channels specifically for terminal device 2 can be transmitted separately. For this reason, base station device 1 can efficiently map control channels dedicated to multiple terminal devices.

[0203] The USS can be configured to be used by multiple terminal devices. Because a common USS is set across multiple terminal devices, parameters specific to terminal device 2 are set to the same value across all terminal devices. For example, the unit for setting the same parameters across multiple terminal devices could be cell, transmitting point, or a group of predetermined terminal devices.

[0204] The search space for each aggregation level is defined by a set of candidate PDCCHs. Each PDCCH is sent using one or more sets of CCEs. The number of CCEs used in a PDCCH is also referred to as the aggregation level. For example, the number of CCEs used in a PDCCH may be 1, 2, 4, or 8.

[0205] The search space for each aggregation level is defined by a set of candidate EPDCCHs. Each EPDCCH is transmitted using one or more sets of Enhanced Control Channel Elements (ECCEs). The number of ECCEs used in an EPDCCH is also referred to as the aggregation level. For example, the number of ECCEs used in an EPDCCH can be 1, 2, 4, 8, 16, or 32.

[0206] The number of candidate PDCCHs or candidate EPDCCHs is determined based on at least the search space and the aggregation level. For example, in CSS, the number of candidate PDCCHs in aggregation levels 4 and 8 are 4 and 2, respectively. For example, in USS, the number of candidate PDCCHs in aggregations 1, 2, 4, and 8 are 6, 6, 2, and 2, respectively.

[0207] Each ECCE includes multiple EREGs. EREGs are used to define the mapping of resource elements to the EPDCCH. Sixteen EREGs are defined in each RB pair, and these 16 EREGs are assigned numbers from 0 to 15. In other words, EREG0 to EREG15 are defined in each RB pair. For each RB pair, EREG0 to EREG15 are defined preferentially along the frequency direction at regular intervals for resource elements other than those to which predetermined signals and / or channels are mapped. For example, no EREG is defined for resource elements to which demodulation reference signals associated with the EPDCCH transmitted through antenna ports 107 to 110 are mapped.

[0208] The number of ECCEs used in an EPDCCH depends on the EPDCCH format and is determined by other parameters. The number of ECCEs used in an EPDCCH is also known as the aggregation level. For example, the number of ECCEs used in an EPDCCH is determined by the number of resource elements in an RB pair that can be used for EPDCCH transmission, the EPDCCH transmission method, etc. For example, the number of ECCEs used in an EPDCCH can be 1, 2, 4, 8, 16, or 32. Additionally, the number of EREGs used in an ECCE is determined by the subframe type and the cyclic prefix type, and is either 4 or 8. Distributed transmission and local transmission are supported as EPDCCH transmission methods.

[0209] Distributed or partial transmission can be used in EPDCCH. Distributed and partial transmissions differ in their mapping from ECCE to EREG and RB pairs. For example, in distributed transmission, an ECCE is configured using EREG with multiple RB pairs. In partial transmission, an ECCE is configured using EREG with one RB pair.

[0210] Base station device 1 performs EPDCCH-related settings in terminal device 2. Terminal device 2 monitors multiple EPDCCHs based on the settings from base station device 1. A set of RB pairs can be configured for the EPDCCHs monitored by terminal device 2. This set of RB pairs is also referred to as an EPDCCH set or EPDCCH-PRB set. One or more EPDCCH sets can be configured in one terminal device 2. Each EPDCCH set includes one or more RB pairs. Furthermore, EPDCCH-related settings can be performed separately for each EPDCCH set.

[0211] Base station device 1 can configure a predetermined number of EPDCCH sets in terminal device 2. For example, up to two EPDCCH sets can be configured as EPDCCH set 0 and / or EPDCCH set 1. Each EPDCCH set can consist of a predetermined number of RB pairs. Each EPDCCH set constitutes a set of ECCEs. The number of ECCEs configured in an EPDCCH set is determined based on the number of RB pairs configured in the EPDCCH set and the number of EREGs used in an ECCE. When the number of ECCEs configured in an EPDCCH set is N, each EPDCCH set constitutes ECCEs 0 to N-1. For example, when the number of EREGs used in an ECCE is 4, an EPDCCH set consisting of 4 RB pairs constitutes 16 ECCEs.

[0212] <Details of the channel state information in this embodiment>

[0213] Terminal device 2 reports CSI to base station device 1. The time and frequency resources used for reporting CSI are controlled by base station device 1. In terminal device 2, CSI-related settings are executed via RRC signaling from base station device 1. In terminal device 2, one or more CSI processes are set up in a predetermined transmission mode. The CSI reported by terminal device 2 corresponds to a CSI process. For example, a CSI process is a unit of control or setting related to CSI. For each CSI process, settings related to CSI-RS resources, CSI-IM resources, periodic CSI reporting (e.g., reporting period and offset), and / or non-periodic CSI reporting can be set independently.

[0214] CSI includes a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a Precoding Type Indicator (PTI), a Rank Indicator (RI), and / or a CSI-RS Resource Indicator (CRI). The RI indicates the number of transmission layers (the number of ranks). The PMI is information indicating a pre-specified precoding matrix. The PMI indicates a precoding matrix using one or two pieces of information. When using two pieces of information, the PMI is also referred to as the First PMI and the Second PMI. The CQI is information indicating a combination of a pre-specified modulation scheme and coding rate. The CRI is information indicating the selection of one CSI-RS resource from two or more CSI-RS resources when two or more CSI-RS resources are set in a CSI process (single instance). Terminal device 2 reports the CSI to base station device 1. Terminal device 2 reports the CQI that satisfies the predetermined receive quality for each transmission block (codeword).

[0215] In the CRI report, a CSI-RS resource is selected from the CSI-RS resources to be configured. When reporting a CRI, the PMI, CQI, and RI to be reported are calculated (selected) based on the reported CRI. For example, if the CSI-RS resource to be configured is precoded, terminal device 2 reports the CRI, thereby reporting the precoding (beaming) suitable for terminal device 2.

[0216] The subframe (report instance) capable of performing periodic CSI reporting is determined by the reporting period and subframe offset set by parameters (CQIPMI index, RI index, and CRI index) from higher layers. Furthermore, higher-layer parameters can be set independently within a set of subframes to measure CSI. If only one piece of information is set across multiple subframe sets, that information can be set commonly for all subframe sets. Within each serving cell, one or more periodic CSI reports are set by signaling from higher layers.

[0217] CSI report types support PUCCH CSI report mode. CSI report types are also known as PUCCH report types. Type 1 reports support feedback on CQI for the selected subband. Type 1a reports support feedback on subband CQI and second PMI. Type 2, Type 2b, and Type 2c reports support feedback on broadband CQI and PMI. Type 2a reports support feedback on broadband PMI. Type 3 reports support feedback on RI. Type 4 reports support feedback on broadband CQI. Type 5 reports support feedback on RI and broadband PMI. Type 6 reports support feedback on RI and PTI. Type 7 reports support feedback on CRI and RI. Type 8 reports support feedback on CRI, RI, and broadband PMI. Type 9 reports support feedback on CRI, RI, and PTI. Type 10 reports support feedback on CRI.

[0218] In terminal device 2, information related to CSI measurement and CSI reporting is set from base station device 1. CSI measurements are performed based on reference signals and / or reference resources (e.g., CRS, CSI-RS, CSI-IM resources, and / or DRS). The reference signal used for CSI measurements is determined based on settings such as transmission mode. CSI measurements are performed based on channel measurements and interference measurements. For example, the power of the target cell is measured via channel measurements. The power and noise power of cells other than the target cell are measured via interference measurements.

[0219] For example, in CSI measurements, terminal device 2 performs channel measurements and interference measurements based on CRS. For example, in CSI measurements, terminal device 2 performs channel measurements based on CSI-RS and interference measurements based on CRS. For example, in CSI measurements, terminal device 2 performs channel measurements based on CSI-RS and interference measurements based on CSI-IM resources.

[0220] Through higher-level signaling, CSI processing is configured to be dedicated to information from terminal device 2. In terminal device 2, one or more CSI processes are configured, and CSI measurements and CSI reports are performed based on the settings of the CSI processes. For example, when multiple CSI processes are configured, terminal device 2 independently reports multiple CSIs based on each CSI process. Each CSI process includes settings for cell status information, an identifier for the CSI process, setting information related to CSI-RS, setting information related to CSI-IM, a subframe mode set for CSI reporting, setting information related to periodic CSI reporting, and setting information related to non-periodic CSI reporting. Furthermore, the settings for cell status information can be common to multiple CSI processes.

[0221] Terminal device 2 performs CSI measurements using CSI reference resources. For example, when transmitting PDSCH using a set of downlink physical resource blocks indicated by CSI reference resources, terminal device 2 measures CSI. When the CSI subframe set is set via signaling from higher layers, each CSI reference resource belongs to one of the CSI subframe sets and not to two CSI subframe sets.

[0222] In the frequency direction, the CSI reference resource is defined by a set of downlink physical resource blocks corresponding to the frequency band associated with the measured CQI value.

[0223] In the layer direction (spatial direction), the CSI reference resource is defined by the RI and PMI, the conditions of which are set by the measured CQI. In other words, in the layer direction (spatial direction), the CSI reference resource is defined by the RI and PMI adopted or generated when the CQI is measured.

[0224] In the temporal direction, the CSI reference resource is defined by one or more predetermined downlink subframes. Specifically, the CSI reference resource is defined by a predetermined number of valid subframes preceding the subframe used for reporting CSI. The predetermined number of subframes used to define the CSI reference resource is determined based on the transmission mode, frame structure type, the number of CSI processes to be set, and / or the CSI reporting mode. For example, in the case where one CSI process and a periodic CSI reporting mode are set in terminal device 2, the predetermined number of subframes used to define the CSI reference resource among the valid downlink subframes is a minimum of 4 or greater.

[0225] A valid subframe is a subframe that meets predetermined conditions. A downlink subframe in the serving cell is considered valid if some or all of the following conditions are met.

[0226] (1) In terminal device 2, which has RRC parameters related to ON and OFF states, the effective downlink subframe is the subframe in the ON state.

[0227] (2) In terminal device 2, the effective downlink subframe is set as a downlink subframe;

[0228] (3) In the predetermined transmission mode, the effective downlink subframe is not a Multimedia Broadcast Multicast Service Single Frequency Network (MBSFN) subframe;

[0229] (4) The effective downlink subframes are not included in the range of the measurement interval (measurement gap) set in the terminal device 2;

[0230] (5) When a set of CSI subframes is set in the periodic CSI report in terminal device 2, the effective downlink subframes are elements or a portion of the set of CSI subframes linked to the periodic CSI report; and

[0231] (6) A valid downlink subframe is an element or part of a set of CSI subframes linked to a corresponding CSI request in the uplink DCI format of an aperiodic CSI report used for CSI processing. Under these conditions, a predetermined transmission mode, multiple CSI processes, and a set of CSI subframes for CSI processing are set in terminal device 2.

[0232] <Details of multi-carrier transmission in this embodiment>

[0233] Multiple cells are configured for terminal device 2, and terminal device 2 is capable of performing multi-carrier transmission. Communication using multiple cells by terminal device 2 is referred to as carrier aggregation (CA) or dual connectivity (DC). The content described in this embodiment can be applied to each or some of the multiple cells configured in terminal device 2. The cells configured in terminal device 2 are also referred to as serving cells.

[0234] In CA, the multiple serving cells to be configured include one primary cell (PCell) and one or more secondary cells (SCell).

[0235] It is possible to set up a primary cell and one or more secondary cells in a terminal device 2 that supports CA.

[0236] The primary cell is the serving cell that performs the initial connection establishment procedure, the serving cell that initiates the initial connection re-establishment procedure, or the cell designated as the primary cell during handover. The primary cell operates using the primary frequency. After a connection is established or rebuilt, a secondary cell can be configured. The secondary cell operates using the secondary frequency. Additionally, this connection is also referred to as an RRC connection.

[0237] DC operates as follows: Terminal device 2 consumes radio resources provided from at least two different network points. These network points are a primary base station device (primary eNB (MeNB)) and a secondary base station device (secondary eNB (SeNB)). In dual connectivity, terminal device 2 establishes an RRC connection through at least two network points. In dual connectivity, these two network points can be connected via a non-ideal backhaul.

[0238] In a DC (Distributed Center), base station device 1, which is connected to at least the S1-MME and acts as a mobile anchor point in the core network, is called the primary base station device. Additionally, base station device 1 that is not a primary base station device providing additional radio resources to terminal device 2 is called a secondary base station device. The group of serving cells associated with the primary base station device is also called the primary cell group (MCG). The group of serving cells associated with the secondary base station device is also called the secondary cell group (SCG).

[0239] In a DC (Distributed Cell), the primary cell belongs to the MCG (Multi-Cell Group). In an SCG (Supported Cell Group), the secondary cell corresponding to the primary cell is called a Primary-Secondary Cell (PSCell). Functions (capabilities and performance) equivalent to a PCell (the base station equipment constituting a PCell) can be supported by a PSCell. However, a PSCell may only support some of the functions of a PCell. For example, a PSCell may support the function of performing PDCCH transmission using a search space different from CSS (CSS) or USS (USS). Furthermore, a PSCell can be continuously active. Additionally, a PSCell is a cell capable of receiving PUCCH (Programmable Continuous Cell).

[0240] In the DC, radio bearers (data radio bearers (DRBs) and / or signaling radio bearers (SRBs)) can be allocated via MeNB and SeNB respectively. Duplex modes can be configured in each of the MCG (PCell) and SCG (PSCell). The MCG (PCell) and SCG (PSCell) do not need to be synchronized with each other. Parameters for adjusting multiple timings (Timing Advance Groups (TAGs)) can be independently configured in the MCG (PCell) and SCG (PSCell). In dual connectivity, terminal device 2 transmits UCIs corresponding to cells in the MCG only via the MeNB (PCell) and UCIs corresponding to cells in the SCG only via the SeNB (pSCell). In the transmission of each UCI, a transmission method using PUCCH and / or PUSCH is applied in each cell group.

[0241] PUCCH and PBCH (MIB) are sent only through PCell or PSCell. Additionally, PRACH is sent only through PCell or PSCell, provided that multiple tags are not set between cells in the CG.

[0242] In PCell or PSCell, semi-permanent scheduling (SPS) or discontinuous transmission (DRX) can be performed.

[0243] In secondary cells, the same DRX can be executed as in PCell or PSCell in the same cell group.

[0244] In secondary cells, MAC settings and related information / parameters are largely shared with the PCell or PSCell in the same cell group. Some parameters can be set for each secondary cell. Some timers or counters can be applied only to the PCell or PSCell.

[0245] In CA, cells using TDD and cells using FDD can be aggregated. When TDD and FDD cells are aggregated, this disclosure can be applied to either TDD or FDD cells.

[0246] Terminal device 2 sends information indicating the combination of frequency bands supported by CA to base station device 1. Terminal device 2 also sends information indicating whether simultaneous transmission and reception are supported in multiple serving cells across multiple different frequency bands in each frequency band combination to base station device 1.

[0247] <Details of resource allocation in this embodiment>

[0248] The base station device 1 can use multiple methods to allocate PDSCH and / or PUSCH resources to the terminal device 2. These resource allocation methods include dynamic scheduling, semi-permanent scheduling, multi-subframe scheduling, and cross-subframe scheduling.

[0249] In dynamic scheduling, a DCI performs resource allocation within a subframe. Specifically, the PDCCH or EPDCCH in a subframe performs scheduling of the PDSCH in that subframe. The PDCCH or EPDCCH in a subframe performs scheduling of the PUSCH in a predetermined subframe following that subframe.

[0250] In multi-subframe scheduling, a DCI allocates resources in one or more subframes. Specifically, the PDCCH or EPDCCH in a subframe performs scheduling of PDSCH in one or more subframes following that subframe. The PDCCH or EPDCCH in a subframe performs scheduling of PUSCH in one or more subframes following that subframe. The predetermined number can be set to zero or a larger integer. The predetermined number can be specified in advance and can be determined based on physical layer signaling and / or RRC signaling. In multi-subframe scheduling, consecutive subframes can be scheduled, or subframes with a predetermined time period can be scheduled. The number of subframes to be scheduled can be specified in advance or can be determined based on physical layer signaling and / or RRC signaling.

[0251] In cross-subframe scheduling, a DCI allocates resources within a subframe. Specifically, the PDCCH or EPDCCH in a given subframe performs scheduling of the PDSCH in a predetermined number of subframes following that subframe. The PDCCH or EPDCCH in a given subframe performs scheduling of the PUSCH in a predetermined number of subframes following that subframe. This predetermined number can be set to zero or a larger integer. The predetermined number can be pre-specified and can be determined based on physical layer signaling and / or RRC signaling. In cross-subframe scheduling, consecutive subframes can be scheduled, or subframes with a predetermined time period can be scheduled.

[0252] In Semi-Permanent Scheduling (SPS), a DCI allocates resources in one or more subframes. When SPS-related information is set via RRC signaling and a PDCCH or EPDCCH for activating SPS is detected, terminal device 2 activates SPS-related processing based on the SPS-related settings and receives a predetermined PDSCH and / or PUSCH. When a PDCCH or EPDCCH for deactivating SPS is detected when SPS is activated, terminal device 2 deactivates (disables) SPS and stops receiving the predetermined PDSCH and / or PUSCH. SPS deactivation can be performed based on predetermined conditions. For example, SPS is deactivated when a predetermined number of empty transmissions are received. Empty transmissions for deactivating SPS correspond to a MAC Protocol Data Unit (PDU) including zero MAC Service Data Units (SDUs).

[0253] Information related to SPS executed by RRC signaling includes the SPS C-RNTI as the SPN RNTI, information related to the time period (interval) during which PDSCH is scheduled, information related to the time period (interval) during which PUSCH is scheduled, information related to the settings used to deactivate SPS, and / or the number of the HARQ process in SPS. SPS is supported only in the primary cell and / or primary / secondary cells.

[0254] <HARQ in this embodiment>

[0255] In this embodiment, HARQ has various features. HARQ sends and resends the send block. In HARQ, a predetermined number of processes (HARQ processes) are used (set), and each process operates independently according to the stop-and-wait scheme.

[0256] In the downlink, HARQ operates asynchronously and adaptively. In other words, in the downlink, retransmissions are continuously scheduled via the PDCCH. Uplink HARQ-ACK (response information) corresponding to the downlink transmission is sent via PUCCH or PUSCH. In the downlink, the PDCCH notifies the HARQ processing number indicating whether the transmission was an initial transmission or a retransmission.

[0257] In the uplink, HARQ operates synchronously or asynchronously. Downlink HARQ-ACK (response information) corresponding to the uplink transmission is sent via PHICH. In uplink HARQ, the terminal device's operation is determined based on the HARQ feedback received by the terminal device and / or the PDCCH received by the terminal device. For example, if the PDCCH is not received and the HARQ feedback is ACK, the terminal device does not perform a retransmission but instead stores the data in the HARQ buffer. In this case, the PDCCH can be sent to restart the retransmission. Alternatively, for example, if the PDCCH is not received and the HARQ feedback is NACK, the terminal device performs a non-adaptive retransmission via a predetermined uplink subframe. Furthermore, for example, if the PDCCH is received, the terminal device performs a transmission or retransmission based on the content notified via the PDCCH, regardless of the content of the HARQ feedback.

[0258] Additionally, in the uplink, HARQ can operate asynchronously only if predetermined conditions (settings) are met. In other words, downlink HARQ-ACKs are not sent, and uplink retransmissions can be continuously scheduled via PDCCH.

[0259] In a HARQ-ACK report, HARQ-ACK indicates ACK, NACK, or DTX. When HARQ-ACK is ACK, it indicates that the corresponding transmit block (codeword and channel) was correctly received (decoded). When HARQ-ACK is NACK, it indicates that the corresponding transmit block (codeword and channel) was not correctly received (decoded). When HARQ-ACK is DTX, it indicates that the corresponding transmit block (codeword and channel) did not exist (was not transmitted).

[0260] A predetermined number of HARQ processes are set (specified) in each of the downlink and uplink. For example, in FDD, up to eight HARQ processes are used per serving cell. Alternatively, in TDD, for example, the maximum number of HARQ processes is determined by the uplink / downlink settings. The maximum number of HARQ processes can be determined based on the round-trip time (RTT). For example, if the RTT is 8 TTIs, the maximum number of HARQ processes can be 8.

[0261] In this embodiment, the HARQ information consists of at least a New Data Indicator (NDI) and a Transmit Block Size (TBS). The NDI indicates whether the transmit block corresponding to the HARQ information is an initial transmission or a retransmission. The TBS is the size of the transmit block. A transmit block is a block of data in the transmission channel (transmit layer) and can be the unit used to perform HARQ. In DL-SCH transmission, the HARQ information also includes a HARQ processing ID (HARQ processing number). In UL-SCH transmission, the HARQ information also includes the information bits encoded in the transmit block and a redundant version (RV) of the information as a parity bit. In the case of spatial multiplexing in DL-SCH, its HARQ information includes a set of NDIs and TBSs for each transmit block.

[0262] <Details of LTE downlink resource element mapping in this embodiment>

[0263] Figure 10This is a diagram illustrating an example of LTE downlink resource element mapping in this embodiment. In this example, a set of resource elements in a resource block pair is described when the number of OFDM symbols in one resource block and one time slot is 7. Furthermore, the seven OFDM symbols in the first half of the time direction in the resource block pair are also referred to as time slot 0 (first time slot). The seven OFDM symbols in the second half of the time direction in the resource block pair are also referred to as time slot 1 (second time slot). Additionally, the OFDM symbols in each time slot (resource block) are indicated by OFDM symbol numbers 0 to 6. Furthermore, the subcarriers in the frequency direction in the resource block pair are indicated by subcarrier numbers 0 to 11. Furthermore, when the system bandwidth consists of multiple resource blocks, different subcarrier numbers are allocated across the system bandwidth. For example, when the system bandwidth consists of six resource blocks, subcarriers assigned subcarrier numbers 0 to 71 are used. Additionally, in the description of this embodiment, resource element (k, l) is a resource element indicated by subcarrier number k and OFDM symbol number l.

[0264] The resource elements indicated by R0 to R3 respectively indicate the cell-specific reference signals for antenna ports 0 to 3. Hereinafter, the cell-specific reference signals for antenna ports 0 to 3 are also referred to as the cell-specific RS (CRS). This example describes the case where the CRS uses 4 antenna ports, but this number can be changed. For example, the CRS can use one antenna port or two antenna ports. Furthermore, the CRS can be shifted along the frequency direction based on the cell ID. For example, the CRS can be shifted along the frequency direction based on the remainder obtained by dividing the cell ID by 6.

[0265] Resource elements C1 to C4 indicate reference signals (CSI-RS) used to measure the transmit path status of antenna ports 15 to 22. Resource elements C1 to C4 respectively indicate the CSI-RS for CDM groups 1 to 4. The CSI-RS consists of orthogonal sequences (orthogonal codes) using Walsh codes and scrambling codes using pseudo-random sequences. Furthermore, using orthogonal codes (such as Walsh codes) within the CDM groups, the CSI-RS is code-division multiplexed. Additionally, the CSI-RS is mutually frequency-division multiplexed (FDM) between CDM groups.

[0266] The CSI-RS of antenna ports 15 and 16 are mapped to C1. The CSI-RS of antenna ports 17 and 18 are mapped to C2. The CSI-RS of antenna ports 19 and 20 are mapped to C3. The CSI-RS of antenna ports 21 and 22 are mapped to C4.

[0267] Multiple antenna ports for CSI-RS are specified.

[0268] CSI-RS can be configured as a reference signal corresponding to eight antenna ports from antenna ports 15 to 22. Additionally, CSI-RS can be configured as a reference signal corresponding to four antenna ports from antenna ports 15 to 18. Furthermore, CSI-RS can be configured as a reference signal corresponding to two antenna ports from antenna ports 15 to 16. Additionally, CSI-RS can be configured as a reference signal corresponding to one antenna port from antenna port 15. CSI-RS can be mapped to several subframes, and for example, CSI-RS can be mapped to every two or more subframes. Multiple mapping modes are specified for the resource elements of CSI-RS. Furthermore, base station device 1 can configure multiple CSI-RS in terminal device 2.

[0269] CSI-RS can be set to zero transmit power. A CSI-RS with zero transmit power is also called a zero-power CSI-RS. Zero-power CSI-RS is set independently of the CSI-RS at antenna ports 15 to 22. Additionally, CSI-RS at antenna ports 15 to 22 are also called non-zero-power CSI-RS.

[0270] Base station device 1 configures CSI-RS as dedicated control information for terminal device 2 via RRC signaling. In terminal device 2, CSI-RS is configured by base station device 1 via RRC signaling. Additionally, terminal device 2 can configure CSI-IM resources as resources for measuring interference power. Terminal device 2 generates feedback information using CSI-RS, CSI-RS, and / or CSI-IM resources based on the settings from base station device 1.

[0271] Resource elements D1 to D2 indicate the DL-DMRS for CDM group 1 and CDM group 2, respectively. The DL-DMRS are constructed using orthogonal sequences (orthogonal codes) employing Walsh codes and scrambling sequences based on pseudo-random sequences. Furthermore, the DL-DMRS are independent for each antenna port and can be multiplexed within each resource block pair. The DL-DMRS are orthogonal to each other between antenna ports according to CDM and / or FDM. Each DL-DMRS undergoes CDM within the CDM group according to the orthogonal codes. The DL-DMRS undergo FDM between CDM groups. DL-DMRS within the same CDM group are mapped to the same resource element. For DL-DMRS within the same CDM group, different orthogonal sequences are used between antenna ports, and the orthogonal sequences are orthogonal to each other. DL-DMRS used for PDSCH can use some or all of the eight antenna ports (antenna ports 7 to 14). In other words, the PDSCH associated with the DL-DMRS can perform up to 8-rank MIMO transmission. The DL-DMRS used for EPDCCH can utilize some or all of the four antenna ports (antenna ports 107 to 110). Additionally, DL-DMRS can change the spreading code length of the CDM or the number of resource elements to be mapped based on the number of ranks of the associated channel.

[0272] The DL-DMRS of PDSCH to be transmitted through antenna ports 7, 8, 11, and 13 are mapped to resource elements indicated by D1. The DL-DMRS of PDSCH to be transmitted through antenna ports 9, 10, 12, and 14 are mapped to resource elements indicated by D2. Additionally, the DL-DMRS of EPDCCH to be transmitted through antenna ports 107 and 108 are mapped to resource elements indicated by D1. The DL-DMRS of EPDCCH to be transmitted through antenna ports 109 and 110 are mapped to resource elements indicated by D2.

[0273] <Details of the downlink resource element mapping for NR in this embodiment>

[0274] The following will describe an example of the mapping of downlink resource elements for a predefined resource in NR.

[0275] Here, the predetermined resource may be referred to as an NR resource block (NR-RB), which is a resource block in NR. The predetermined resource can be defined based on the unit of allocation associated with a predetermined channel or predetermined signal (such as NR-PDSCH or NR-PDCCH), the unit that defines the mapping of the predetermined channel or predetermined signal to resource elements, and / or the unit that sets the parameter set.

[0276] Figure 11This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment. Figure 11 This refers to a set of resource elements in the predetermined resources when using parameter set 0. Figure 11 The predetermined resources shown are resources formed by time length and frequency bandwidth, such as a resource block pair in LTE.

[0277] exist Figure 11 In the example, the predetermined resources include 14 OFDM symbols indicated by OFDM symbol numbers 0 to 13 along the time direction and 12 subcarriers indicated by subcarrier numbers 0 to 11 along the frequency direction. When the system bandwidth includes the plurality of predetermined resources, the subcarrier numbers are allocated across the entire system bandwidth.

[0278] Resource elements C1 through C4 indicate reference signals (CSI-RS) used to measure the transmit path status of antenna ports 15 through 22. Resource elements D1 and D2 indicate DL-DMRS for CDM group 1 and CDM group 2, respectively.

[0279] Figure 12 This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment. Figure 12 This refers to a set of resource elements in the predetermined resources when using parameter set 1. Figure 12 The predetermined resources shown are resources formed with the same time length and frequency bandwidth as a resource block pair in LTE.

[0280] exist Figure 12 In the example, the predetermined resources include seven OFDM symbols indicated by OFDM symbol numbers 0 to 6 along the time direction and 24 subcarriers indicated by subcarrier numbers 0 to 23 along the frequency direction. When the system bandwidth includes the plurality of predetermined resources, the subcarrier numbers are allocated across the entire system bandwidth.

[0281] Resource elements C1 through C4 indicate reference signals (CSI-RS) used to measure the transmit path status of antenna ports 15 through 22. Resource elements D1 and D2 indicate DL-DMRS for CDM group 1 and CDM group 2, respectively.

[0282] Figure 13 This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment. Figure 13 This refers to a set of resource elements in the predetermined resources when using parameter set 1. Figure 13 The predetermined resources shown are resources formed with the same time length and frequency bandwidth as a resource block pair in LTE.

[0283] exist Figure 13 In the example, the predetermined resources include 28 OFDM symbols indicated by OFDM symbol numbers 0 to 27 along the time direction and 6 subcarriers indicated by subcarrier numbers 0 to 6 along the frequency direction. When the system bandwidth includes the plurality of predetermined resources, the subcarrier numbers are allocated across the entire system bandwidth.

[0284] Resource elements C1 through C4 indicate reference signals (CSI-RS) used to measure the transmit path status of antenna ports 15 through 22. Resource elements D1 and D2 indicate DL-DMRS for CDM group 1 and CDM group 2, respectively.

[0285] For example, in NR, a reference signal equivalent to the CRS in LTE may not be transmitted.

[0286] <Details of the NR resource element mapping method in this embodiment>

[0287] As described above, in this embodiment, Figures 11 to 13 The physical signals shown, having different parameters related to the transmitted signal, can be multiplexed in NR via FDM or the like. For example, this multiplexing is performed using predetermined resources as a unit. Furthermore, even if base station device 1, which performs scheduling or the like, recognizes the multiplexing, terminal device 2 may not recognize it. Terminal device 2 may only recognize physical signals received or transmitted by terminal device 2, or it may not recognize physical signals not received or transmitted by terminal device 2.

[0288] Additionally, parameters related to transmitted signals can be defined, set, or specified in the mapping to resource elements. In NR, resource element mapping can be performed using various methods. It should be noted that this embodiment describes the method of NR resource element mapping with reference to the downlink, but it is applicable to both the uplink and sidelink.

[0289] The first mapping method related to resource element mapping in NR is a method of setting or specifying parameters (physical parameters) related to the transmission signal in a predefined resource.

[0290] In the first mapping method, parameters related to the transmitted signal are set in the predetermined resource. These parameters include the subframe interval of the subcarriers in the predetermined resource, the number of subcarriers included in the predetermined resource, the number of symbols included in the predetermined resource, the CP length type in the predetermined resource, the multiple access scheme used in the predetermined resource, and / or other parameters set in the predetermined resource.

[0291] For example, in the first mapping method, the resource grid in the NR can be defined using the predetermined resources.

[0292] Figure 14 This is a diagram illustrating an example of a resource element mapping method for NR according to this embodiment. Figure 14 In the example, one or more predetermined resources can undergo FDM within a predetermined system bandwidth and a predetermined time region (subframe).

[0293] The bandwidth and / or duration of the predetermined resource can be specified in advance. For example, the bandwidth of the predetermined resource corresponds to 180 kHz, and the duration of the predetermined resource corresponds to 1 millisecond. That is, the predetermined resource corresponds to the same bandwidth and duration as a resource block pair in LTE.

[0294] Furthermore, the bandwidth and / or duration of the predetermined resources can be set via RRC signaling. For example, based on information included in a MIB or SIB transmitted via a broadcast channel, the bandwidth and / or duration of the predetermined resources are set to be dedicated to base station device 1 (cell). Alternatively, for example, based on control information dedicated to terminal device 2, the bandwidth and / or duration of the predetermined resources are set to be dedicated to terminal device 2.

[0295] In the first mapping method, parameters related to the transmitted signal set in the predetermined resources can be set via RRC signaling. For example, based on information included in a MIB or SIB transmitted via a broadcast channel, the parameters are set to be dedicated to base station device 1 (cell). Alternatively, for example, based on control information dedicated to terminal device 2, the parameters are set to be dedicated to terminal device 2.

[0296] In the first mapping method, parameters related to the transmitted signal are set in the predetermined resource based on at least one of the following methods or definitions.

[0297] (1) Individually set parameters related to the transmission signal in each of the predetermined resources.

[0298] (2) Individually set parameters related to the transmitted signal in each group of the predetermined resources. The group of predetermined resources is a collection of predetermined resources that are consecutive along the frequency direction. The number of predetermined resources included in the group can be specified in advance or set via RRC signaling.

[0299] (3) The predetermined resources for which certain parameters are set are predetermined continuous resources determined based on information indicating the start and / or end of the predetermined resources. This information can be set via RRC signaling.

[0300] (4) The predetermined resource for which a certain parameter is set is indicated by information about a bitmap. For example, each bit included in the information about the bitmap corresponds to the predetermined resource or a set of the predetermined resources. When a bit included in the information about the bitmap is 1, the parameter in the predetermined resource or the set of the predetermined resources corresponding to that bit is set. The information about the bitmap can be set via RRC signaling.

[0301] (5) When a predetermined signal or channel is mapped (transmitted) to the predetermined resource, pre-specified parameters are used. For example, when a predetermined resource is used to transmit a synchronization signal or broadcast channel, pre-specified parameters are used. For example, the pre-specified parameters correspond to the same bandwidth and time length as resource block pairs in LTE.

[0302] (6) In a predetermined time region (i.e., all the predetermined resources included in the predetermined time region) to which the predetermined signal or the predetermined channel is mapped (transmitted), pre-specified parameters are used. For example, in a subframe to which the predetermined resources include a transmission synchronization signal or a broadcast channel, pre-specified parameters are used. For example, the pre-specified parameters correspond to the same bandwidth and time length as resource block pairs in LTE.

[0303] (7) In a predetermined resource for which no parameters are set, pre-specified parameters are used. For example, in a predetermined resource for which no parameters are set, the same parameters as those used for transmitting a synchronization signal or broadcasting a channel are used.

[0304] (8) Within a cell (component carrier), the parameters that can be set are limited. For example, for the subcarrier spacing that can be set within a cell, the bandwidth in the predetermined resources is such that the value is an integer multiple of the subcarrier spacing. Specifically, when the bandwidth in the predetermined resources is 180 kHz, the subcarrier spacings that can be set include 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, and 60 kHz.

[0305] The second mapping method related to resource element mapping in NR is a method based on sub-resource elements used to define resource elements.

[0306] In the second mapping method, sub-resource elements are used to specify, set, or define resource elements corresponding to parameters related to the transmitted signal. In the second mapping method, resource elements and sub-resource elements are referred to as the first element and the second element, respectively.

[0307] In other words, in the second mapping method, parameters (physical parameters) related to the transmitted signal are set based on settings associated with the sub-resource element.

[0308] For example, in a predetermined resource, the number of sub-resource elements or the pattern of the sub-resource elements included in a resource element can be set. Furthermore, the predetermined resource can be set to be the same as the predetermined resource described in this embodiment.

[0309] For example, in the second mapping method, a resource grid in NR can be defined using a predetermined number of sub-resource elements.

[0310] Figure 15 This is a diagram illustrating an example of a resource element mapping method for NR according to this embodiment. Figure 15 In the example, each predetermined resource includes 28 sub-resource elements along the time direction and 24 sub-resource elements along the frequency direction. That is, when the frequency bandwidth in the predetermined resource is 180kHz, the frequency bandwidth in the sub-resource elements is 7.5kHz.

[0311] The bandwidth and / or time length in a sub-resource element can be pre-specified. Alternatively, for example, a sub-resource element may correspond to the same bandwidth (15kHz) and time length as a sub-resource element in LTE.

[0312] Furthermore, the bandwidth and / or duration of a sub-resource element can be set via RRC signaling. For example, based on information included in a MIB or SIB transmitted via a broadcast channel, the bandwidth and / or duration of a sub-resource element are set to be dedicated to base station device 1 (cell). Alternatively, for example, based on control information dedicated to terminal device 2, the bandwidth and / or duration of a sub-resource element are set to be dedicated to terminal device 2. Additionally, if the bandwidth and / or duration of a sub-resource element are not set, the sub-resource element can correspond to the same bandwidth (15kHz) and duration as sub-resource elements in LTE.

[0313] In the second mapping method, it is possible to set a sub-resource element included in a resource element based on at least one of the following methods or definitions.

[0314] (1) Perform settings individually for each reserved resource.

[0315] (2) The settings are performed individually for each group of the predetermined resources. The group of predetermined resources is a collection of predetermined resources that are consecutive along the frequency direction. The number of predetermined resources included in the group can be specified in advance or set via RRC signaling.

[0316] (3) The predetermined resources configured thereon are predetermined continuous resources determined based on information indicating the start and / or end of the predetermined resources. This information can be configured via RRC signaling.

[0317] (4) The predetermined resource for which settings are performed is indicated by information about a bitmap. For example, each bit included in the information about the bitmap corresponds to the predetermined resource or a group of the predetermined resources. When a bit included in the information about the bitmap is 1, settings are performed on the predetermined resource or the group of the predetermined resources corresponding to that bit. The information about the bitmap can be set via RRC signaling.

[0318] (5) In the predetermined resource to which a predetermined signal or channel is mapped (transmitted), sub-resource elements included in a resource element are pre-specified. For example, in the predetermined resource to which a synchronization signal or broadcast channel is transmitted, sub-resource elements included in a resource element are pre-specified. For example, the pre-specified sub-resource elements correspond to the same bandwidth and time length as resource elements in LTE.

[0319] (6) In a predetermined time region (i.e., all the predetermined resources included in the predetermined time region) to which the predetermined signal or the predetermined channel is mapped (transmitted), a sub-resource element included in a resource element is pre-designated. For example, in a predetermined time region to which the predetermined resource includes the transmission of a synchronization signal or a broadcast channel, a sub-resource element included in a resource element is pre-designated. For example, the pre-designated sub-resource element corresponds to the same bandwidth and time length as the resource element in LTE.

[0320] (7) In the predetermined resource where no settings are performed, the sub-resource elements included in a resource element are pre-specified. For example, in the predetermined resource where no settings are performed, the sub-resource elements included in a resource element are the same sub-resource elements used in the predetermined resource for transmitting synchronization signals or broadcast channels.

[0321] (8) The setting refers to the number of sub-resource elements included in a resource element. The setting specifies the number of sub-resource elements included in a resource element along the frequency direction and / or time direction. For example, sub-resource elements are considered as... Figure 15The configuration is the same as in LTE. When one resource element includes two sub-resource elements along the frequency direction and two sub-resource elements along the time direction of the predetermined resource, the predetermined resource includes 12 subcarriers and 14 symbols. This structure (configuration) is the same as the number of subcarriers and symbols included in a resource block pair in LTE and is suitable for eMBB applications. Alternatively, when one resource element includes four sub-resource elements along the frequency direction and one sub-resource element along the time direction of the predetermined resource, the predetermined resource includes 6 subcarriers and 28 symbols. This structure (configuration) is suitable for URLLC applications. Furthermore, when one resource element includes one sub-resource element along the frequency direction and four sub-resource elements along the time direction of the predetermined resource, the predetermined resource includes 24 subcarriers and 7 symbols. This structure (configuration) is suitable for mMTC applications.

[0322] (9) The number of sub-resource elements included in a resource element described in (8) above is pre-patterned, and information (index) indicating the pattern is used for setting. The pattern may include CP length type, sub-resource element definition, multiple access scheme and / or parameter set.

[0323] (10) Within a cell (component carrier) or a time region (subframe), the number of sub-resource elements included in a resource element remains constant. For example, in a cell or a time region, as in the example described in (8) above, the total number of sub-resource elements included in a resource element is 4. That is, in this example, a resource element with a bandwidth and time length that can be configured to include 4 sub-resource elements in a resource element is available.

[0324] It should be noted that, in the description of this embodiment, as described above, the predetermined resource has been used for resource element mapping in the downlink, uplink, or sidelink of the NR. However, this disclosure is not limited thereto. The predetermined resource can be used for resource element mapping in two or more of the downlink, uplink, and sidelink.

[0325] For example, the predetermined resource is used for resource element mapping in the downlink, uplink, and sidelink. In a certain predetermined resource, a predetermined number of preceding symbols are used for resource element mapping in the downlink. In the predetermined resource, a predetermined number of following symbols are used for resource element mapping in the uplink. In the predetermined resource, a predetermined number of symbols between the predetermined number of preceding symbols and the predetermined number of following symbols can be used for guard time. In the predetermined resource, the same physical parameters can be used for the predetermined number of preceding symbols and the predetermined number of following symbols, or independently set physical parameters can be used.

[0326] It should be noted that in the description of this embodiment, the downlink, uplink, and sidelink have been described as independently defined links in the NR, but this disclosure is not limited thereto. The downlink, uplink, and sidelink can be defined as a common link. For example, the channels, signals, processing, and / or resources described in this embodiment can be defined without considering the downlink, uplink, and sidelink. In base station device 1 or terminal device 2, channels, signals, processing, and / or resources are determined based on pre-specified settings, settings executed via RRC signaling, and / or control information in the physical layer. For example, in terminal device 2, the channels and signals that can be transmitted and received are determined based on settings from base station device 1.

[0327] <Application Example>

[0328] [Application Examples of Base Stations]

[0329] (First application example)

[0330] Figure 16 This is a block diagram illustrating a first example of a schematic structure of an eNB to which the technology according to this disclosure can be applied. The eNB 800 includes one or more antennas 810 and a base station device 820. Each antenna 810 and base station device 820 can be connected to each other via an RF cable.

[0331] Each antenna 810 includes one or more antenna elements (e.g., multiple antenna elements constituting a MIMO antenna) and is used by the base station device 820 to transmit and receive wireless signals. The eNB 800 may include the multiple antennas 810, such as... Figure 16 As shown, the plurality of antennas 810 may, for example, correspond to multiple frequency bands used by the eNB 800. It should be noted that, although... Figure 16 This represents an example of an eNB 800 including the plurality of antennas 810, but an eNB 800 may include a single antenna 810.

[0332] The base station equipment 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.

[0333] The controller 821 may be, for example, a CPU or a DSP, and operates various functions of the upper layer of the base station equipment 820. For example, the controller 821 generates data packets from data in signals processed by the wireless communication interface 825, and transmits the generated packets via the network interface 823. The controller 821 can generate bundled packets by bundling data from multiple baseband processors, and transmit the generated bundled packets. Additionally, the controller 821 may also have logical functions for performing control (such as radio resource control, radio bearer control, mobility management, licensing control, and scheduling). Furthermore, this control can be performed cooperatively with surrounding eNBs or core network nodes. The memory 822 includes RAM and ROM, and stores programs executed by the controller 821 and various control data (such as, for example, terminal lists, transmit power data, and scheduling data).

[0334] Network interface 823 is a communication interface used to connect base station equipment 820 to core network 824. Controller 821 can communicate with core network node or another eNB via network interface 823. In this case, eNB 800 can connect to core network node or another eNB via a logical interface (e.g., S1 interface or X2 interface). Network interface 823 can be a wired communication interface or a wireless communication interface for wireless backhaul. When network interface 823 is a wireless communication interface, network interface 823 can use a higher frequency band than that used by wireless communication interface 825 for wireless communication.

[0335] Wireless communication interface 825 supports cellular communication systems (such as LTE or LTE-Advanced) and provides wireless connectivity with terminals located within the cell of eNB 800 via antenna 810. Wireless communication interface 825 may typically include baseband (BB) processor 826, RF circuitry 827, etc. BB processor 826 may, for example, perform encoding / decoding, modulation / demodulation, multiplexing / demultiplexing, etc., and perform various signal processing at each layer (e.g., L1, Media Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP)). Instead of controller 821, BB processor 826 may have some or all of the logical functions described above. BB processor 826 may be a module including a memory storing communication control programs, a processor for executing the programs, and related circuitry, and its functionality may be changeable by updating the programs. Alternatively, the module may be a card or chip to be inserted into a slot in base station equipment 820 or a chip mounted on said card or chip. Meanwhile, the RF circuit 827 may include a mixer, filter, amplifier, etc., and transmits and receives wireless signals via the antenna 810.

[0336] The wireless communication interface 825 may include multiple BB processors 826, such as Figure 16 As shown, the plurality of BB processors 826 may, for example, correspond to multiple frequency bands used by the eNB 800. Additionally, the wireless communication interface 825 may also include multiple RF circuits 827, such as... Figure 16 As shown, the plurality of RF circuits 827 may, for example, correspond to a plurality of antenna elements. It should be noted that... Figure 16 This represents an example of a wireless communication interface 825 including the plurality of BB processors 826 and the plurality of RF circuits 827, but the wireless communication interface 825 may include a single BB processor 826 or a single RF circuit 827.

[0337] (Second application example)

[0338] Figure 17 This is a block diagram illustrating a second example of a schematic structure of an eNB to which the technology according to this disclosure can be applied. The eNB 830 includes one or more antennas 840, a base station device 850, and an RRH 860. Each antenna 840 and RRH 860 can be connected to each other via an RF cable. Alternatively, the base station device 850 and RRH 860 can be connected to each other via a high-speed line (such as fiber optic cable).

[0339] Each antenna 840 includes one or more antenna elements (e.g., antenna elements constituting a MIMO antenna) and is used by the RRH 860 to transmit and receive wireless signals. The eNB 830 may include multiple antennas 840, such as... Figure 17As shown, the plurality of antennas 840 may, for example, correspond to multiple frequency bands used by the eNB 830. It should be noted that... Figure 17 This indicates that the eNB 830 includes the plurality of antennas 840, but the eNB 830 may include a single antenna 840.

[0340] The base station equipment 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857. The controller 851, memory 852, and network interface 853 are similar to those in reference [reference missing]. Figure 16 The controller 821, memory 822, and network interface 823 are described.

[0341] The wireless communication interface 855 supports cellular communication systems (such as LTE and LTE-Advanced) and provides wireless connectivity to terminals located in the sector corresponding to the RRH 860 via the RRH 860 and antenna 840. The wireless communication interface 855 may typically include a BB processor 856, etc. Except that the BB processor 856 is connected to the RF circuitry 864 of the RRH 860 via a connection interface 857, the BB processor 856 is similar to the referenced... Figure 15 The described BB processor 826. The wireless communication interface 855 may include multiple BB processors 856, such as... Figure 16 As shown, the plurality of BB processors 856 may, for example, correspond to multiple frequency bands used by the eNB 830. It should be noted that... Figure 16 This represents an example of a wireless communication interface 855 including the plurality of BB processors 856, but the wireless communication interface 855 may include a single BB processor 856.

[0342] Connection interface 857 is an interface for connecting base station device 850 (wireless communication interface 855) to RRH 860. Connection interface 857 can be a communication module for connecting base station device 850 (wireless communication interface 855) to RRH 860 for communication on a high-speed line.

[0343] In addition, the RRH 860 includes a connectivity interface 861 and a wireless communication interface 863.

[0344] Connection interface 861 is an interface used to connect RRH 860 (wireless communication interface 863) to base station equipment 850. Connection interface 861 can be a communication module used for communication over high-speed lines.

[0345] The wireless communication interface 863 transmits and receives wireless signals via antenna 840. The wireless communication interface 863 may typically include RF circuitry 864, etc. RF circuitry 864 may include mixers, filters, amplifiers, etc., and transmits and receives wireless signals via antenna 840. The wireless communication interface 863 may include multiple RF circuits 864, such as... Figure 17 As shown, the plurality of RF circuits 864 may, for example, correspond to a plurality of antenna elements. It should be noted that... Figure 17 This represents an example of a wireless communication interface 863 including the plurality of RF circuits 864, but the wireless communication interface 863 may include a single RF circuit 864.

[0346] Figure 16 and 17 The eNB 800, eNB 830, base station device 820, or base station device 850 shown can correspond to the above references. Figure 3 Base station device 1 as described above.

[0347] [Application Examples of Terminal Devices]

[0348] (First application example)

[0349] Figure 18 This is a block diagram illustrating an example of the schematic structure of a smartphone 900, which is a terminal device 2 to which the technology according to this disclosure can be applied. The smartphone 900 includes a processor 901, a memory 902, a storage device 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915, one or more antennas 916, a bus 917, a battery 918, and an auxiliary controller 919.

[0350] Processor 901 may be, for example, a CPU or a system-on-a-chip (SoC), and controls the functions of the application layer and other layers of smartphone 900. Memory 902 includes RAM and ROM, and stores programs and data executed by processor 901. Storage device 903 may include storage media such as semiconductor memory and hard disk. External connection interface 904 is an interface for connecting smartphone 900 to external connection devices such as memory cards and universal serial bus (USB) devices.

[0351] Camera 906 includes, for example, an image sensor (such as a charge-coupled device (CCD) and complementary metal-oxide-semiconductor (CMOS)) and produces captured images. Sensor 907 may include a sensor array, such as a positioning sensor, a gyroscope sensor, a geomagnetic sensor, an accelerometer, etc. Microphone 908 converts sound input to smartphone 900 into audio signals. Input device 909 includes, for example, a touch sensor that detects touch on the screen of display device 910, a keypad, a keyboard, buttons, switches, etc., and accepts operation or information input from the user. Display device 910 includes a screen (such as a liquid crystal display (LCD) and an organic light-emitting diode (OLED) display) and displays the output image of smartphone 900. Speaker 911 converts the audio signals output from smartphone 900 into sound.

[0352] The wireless communication interface 912 supports cellular communication systems (such as LTE or LTE-Advanced) and performs wireless communication. The wireless communication interface 912 may typically include a BB processor 913, RF circuitry 914, etc. The BB processor 913 may, for example, perform encoding / decoding, modulation / demodulation, multiplexing / demultiplexing, etc., and perform various types of signal processing for wireless communication. On the other hand, the RF circuitry 914 may include mixers, filters, amplifiers, etc., and transmits and receives wireless signals via antenna 916. The wireless communication interface 912 may be a single-chip module integrating the BB processor 913 and the RF circuitry 914. The wireless communication interface 912 may include multiple BB processors 913 and multiple RF circuits 914, such as... Figure 18 As shown in the image. It is important to note that... Figure 18 This represents an example of a wireless communication interface 912 including multiple BB processors 913 and multiple RF circuits 914, but the wireless communication interface 912 may include a single BB processor 913 or a single RF circuit 914.

[0353] In addition to cellular communication systems, wireless communication interface 912 can also support other types of wireless communication systems, such as short-range wireless communication systems, near-field communication systems, and wireless local area network (LAN) systems. In this case, wireless communication interface 912 may include BB processor 913 and RF circuitry 914 for each wireless communication system.

[0354] Each antenna switch 915 switches the connection destination of antenna 916 among multiple circuits (e.g., circuits for different wireless communication systems) included in the wireless communication interface 912.

[0355] Each antenna 916 includes one or more antenna elements (e.g., multiple antenna elements constituting a MIMO antenna) and is used by the wireless communication interface 912 for transmitting and receiving wireless signals. A smartphone 900 may include multiple antennas 916, such as... Figure 18 As shown in the image. It is important to note that... Figure 18 This indicates that the smartphone 900 includes multiple antennas 916, but the smartphone 900 may include a single antenna 916.

[0356] Additionally, the smartphone 900 may include an antenna 916 for each wireless communication system. In this case, the antenna switch 915 can be omitted from the structure of the smartphone 900.

[0357] Bus 917 connects processor 901, memory 902, storage device 903, external connection interface 904, camera 906, sensor 907, microphone 908, input device 909, display device 910, speaker 911, wireless communication interface 912, and auxiliary controller 919 to each other. Battery 918 provides power to the device via power lines shown as dashed lines in the accompanying drawings. Figure 18 Each block of the smartphone 900 is shown in the diagram. The auxiliary controller 919 provides, for example, the minimum necessary functions for operating the smartphone 900 in sleep mode.

[0358] (Second application example)

[0359] Figure 19 This is a block diagram illustrating an example of a schematic structure of an automotive navigation device 920 to which the technology according to this disclosure can be applied. The automotive navigation device 920 includes a processor 921, a memory 922, a Global Positioning System (GPS) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, a wireless communication interface 933, one or more antenna switches 936, one or more antennas 937, and a battery 938.

[0360] The processor 921 may be, for example, a CPU or a SoC, and controls the navigation functions and other functions of the car navigation device 920. The memory 922 includes RAM and ROM, and stores programs and data executed by the processor 921.

[0361] GPS module 924 uses GPS signals received from GPS satellites to measure the location (e.g., latitude, longitude, and altitude) of the vehicle navigation device 920. Sensor 925 may include a sensor group including, for example, a gyroscope sensor, a geomagnetic sensor, a barometric pressure sensor, etc. Data interface 926 is connected to, for example, an in-vehicle network 941 via a terminal not shown, and acquires data generated on the vehicle side (such as vehicle speed data).

[0362] Content player 927 reproduces content stored on a storage medium (e.g., CD or DVD) inserted into storage medium interface 928. Input device 929 includes, for example, a touch sensor, buttons, switches, etc., to detect when the screen of display device 930 is touched, and accepts operation or information input from the user. Display device 930 includes a screen (such as an LCD or OLED display) and displays images of navigation functions or reproduced content. Speaker 931 outputs sound from navigation functions or reproduced content.

[0363] The wireless communication interface 933 supports cellular communication systems (such as LTE or LTE-Advanced) and performs wireless communication. The wireless communication interface 933 may typically include a BB processor 934, RF circuitry 935, etc. The BB processor 934 may, for example, perform encoding / decoding, modulation / demodulation, multiplexing / demultiplexing, etc., and perform various types of signal processing for wireless communication. On the other hand, the RF circuitry 935 may include mixers, filters, amplifiers, etc., and transmits and receives wireless signals via antenna 937. The wireless communication interface 933 may be a single-chip module integrating the BB processor 934 and the RF circuitry 935. The wireless communication interface 933 may include multiple BB processors 934 and multiple RF circuits 935, such as... Figure 19 As shown in the image. It is important to note that... Figure 19 This represents an example of a wireless communication interface 933 including multiple BB processors 934 and multiple RF circuits 935, but the wireless communication interface 933 may include a single BB processor 934 or a single RF circuit 935.

[0364] In addition to cellular communication systems, wireless communication interface 933 can also support other types of wireless communication systems, such as short-range wireless communication systems, near-field communication systems, and wireless LAN systems. In this case, wireless communication interface 933 may include BB processor 934 and RF circuitry 935 for each wireless communication system.

[0365] Each antenna switch 936 switches the connection destination of antenna 937 among multiple circuits (e.g., circuits for different wireless communication systems) included in the wireless communication interface 933.

[0366] Each antenna 937 includes one or more antenna elements (e.g., multiple antenna elements constituting a MIMO antenna) and is used by the wireless communication interface 933 for transmitting and receiving wireless signals. The car navigation device 920 may include multiple antennas 937, such as... Figure 19 As shown in the image. It is important to note that... Figure 19 This represents an example of a car navigation device 920 including multiple antennas 937, but the car navigation device 920 may include a single antenna 937.

[0367] Additionally, the car navigation device 920 may include an antenna 937 for each wireless communication system. In this case, the antenna switch 936 can be omitted from the structure of the car navigation device 920.

[0368] Battery 938 supplies power to the power supply line shown as a dashed line in the attached drawing. Figure 19 Each block of the car navigation device 920 is shown. Additionally, the battery 938 accumulates power supplied from the vehicle.

[0369] The technology disclosed herein can also be implemented as an in-vehicle system (or vehicle) 940 including one or more blocks of a car navigation device 920, an in-vehicle network 941, and a vehicle module 942. The vehicle module 942 generates vehicle data (such as vehicle speed, engine speed, and fault information) and outputs the generated data to the in-vehicle network 941.

[0370] Furthermore, the effects described in this specification are merely illustrative or exemplary, and not limiting. That is, in addition to or alternative to the effects described above, other effects that are clear to those skilled in the art can be achieved according to the technology of this disclosure.

[0371] Alternatively, this technology can also be constructed as follows.

[0372] (1) A terminal device for communicating with a base station device, the terminal device comprising:

[0373] A higher-layer processing unit is configured to set at least one first RAT and at least one second RAT via signaling from a higher layer of the base station device; and

[0374] The receiving unit is configured to receive the transmitted signals from the first RAT and the transmitted signals from the second RAT.

[0375] The transmitted signals in the first RAT are mapped to resource elements configured for each subframe based on a physical parameter, and

[0376] The transmitted signals in the second RAT are mapped to resource elements configured based on one or more physical parameters for each subframe, and are mapped to resource elements configured based on one physical parameter in the predetermined resources included in each subframe.

[0377] (2) The terminal device as described in (1), wherein the higher layer processing unit sets physical parameters for transmitting signals in the second RAT.

[0378] (3) The terminal device as described in (1) or (2), wherein, without setting the physical parameters, the transmission signal in the second RAT is generated based on the pre-specified physical parameters.

[0379] (4) The terminal device as described in any one of (1) to (3), wherein the physical parameter is the subcarrier spacing.

[0380] (5) The terminal device as described in any one of (1) to (3), wherein the physical parameter is the symbol length.

[0381] (6) The terminal device as described in any one of (1) to 3, wherein the physical parameter is the number of subcarriers in a predetermined resource included in each subframe.

[0382] (7) The terminal device as described in any one of (1) to 3, wherein the physical parameter is the number of symbols in the predetermined resources included in each subframe.

[0383] (8) The terminal device as described in any one of (1) to 7, wherein each resource element to which the transmission signal in the second RAT is mapped is configured using a predetermined number of sub-resource elements corresponding to the physical parameters.

[0384] (9) The terminal device as described in (8), wherein the high-level processing unit sets the predetermined number of sub-resource elements in the predetermined resources.

[0385] (10) A base station apparatus for communicating with a terminal device, the base station apparatus comprising:

[0386] A higher-layer processing unit is configured to set at least one first RAT and at least one second RAT for a terminal device via higher-layer signaling; and

[0387] The transmitting unit is configured to transmit the transmission signal in the first RAT and the transmission signal in the second RAT.

[0388] The transmitted signals in the first RAT are mapped to resource elements configured for each subframe based on a physical parameter, and

[0389] The transmitted signals in the second RAT are mapped to resource elements configured based on one or more physical parameters for each subframe, and are mapped to resource elements configured based on one physical parameter in the predetermined resources included in each subframe.

[0390] (11) A communication method used in a terminal device communicating with a base station device, the communication method comprising:

[0391] The steps of setting at least one first RAT and at least one second RAT via signaling from higher layers of the base station device; and

[0392] The steps of receiving the transmitted signals from the first RAT and the second RAT.

[0393] The transmitted signals in the first RAT are mapped to resource elements configured for each subframe based on a physical parameter, and

[0394] The transmitted signals in the second RAT are mapped to resource elements configured based on one or more physical parameters for each subframe, and are mapped to resource elements configured based on one physical parameter in the predetermined resources included in each subframe.

[0395] (12) A communication method used in a base station device communicating with a terminal device, the communication method comprising:

[0396] The steps of setting at least one first RAT and at least one second RAT for the terminal device via higher-level signaling; and

[0397] The steps of sending the transmission signals in the first RAT and the second RAT.

[0398] The transmitted signals in the first RAT are mapped to resource elements configured for each subframe based on a physical parameter, and

[0399] The transmitted signals in the second RAT are mapped to resource elements configured based on one or more physical parameters for each subframe, and are mapped to resource elements configured based on one physical parameter in the predetermined resources included in each subframe.

Claims

1. A user equipment comprising: transceiver; and A processing circuit coupled to the transceiver, the processing circuit being configured to: Receive synchronization signals (SS) and physical broadcast channels (PBCH) from new radio (NR) cells, and Information indicating the starting predetermined resource for a continuous predetermined resource along the frequency direction is received, wherein SS and PBCH are received within said predetermined resource. For the predetermined resources in which SS and PBCH are received, the subcarrier spacing of SS and PBCH is predefined. The SS and PBCH are mapped to the predetermined resources based on the predefined subcarrier spacing of the SS and PBCH and the information therein. SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), and The predetermined resources used for SS and PBCH that are continuous along the frequency direction are represented by the number of multiple subcarriers along the frequency direction.

2. The user equipment as claimed in claim 1, wherein the subcarrier spacing of the SS and PBCH is one of 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz or 60 kHz.

3. The user equipment as claimed in claim 1, wherein the processing circuitry is further configured to: Carrier aggregation is performed using the first and second cells, with Time Division Multiplexing (TDD) used for the first cell and Frequency Division Multiplexing (FDD) used for the second cell. Receives the SS and PBCH of one of the first and second cells.

4. A base station device, comprising: transceiver; as well as A processing circuit coupled to the transceiver, the processing circuit being configured to: Transmit synchronization signals (SS) and physical broadcast channels (PBCH) for new radio (NR) cells, and Information is provided indicating the starting predetermined resource for a series of predetermined resources consecutive along the frequency direction, wherein the SS and PBCH are transmitted within said predetermined resource. For the predetermined resources in which SS and PBCH are transmitted, the subcarrier spacing of SS and PBCH is predefined. The SS and PBCH are mapped to the predetermined resources based on the predefined subcarrier spacing of the SS and PBCH and the information therein. SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), and The predetermined resources used for SS and PBCH that are continuous along the frequency direction are represented by the number of multiple subcarriers along the frequency direction.

5. The base station equipment according to claim 4, wherein the subcarrier spacing of SS and PBCH is one of 3.75kHz, 7.5kHz, 15kHz, 30kHz or 60kHz.

6. The base station equipment according to claim 5, wherein the processing circuit is further configured to: Carrier aggregation is performed using the first and second cells, with Time Division Multiplexing (TDD) used for the first cell and Frequency Division Multiplexing (FDD) used for the second cell. Send the SS and PBCH of one of the first and second cells.

7. An electronic device comprising: Processing circuitry, the processing circuitry being configured to control the radio transceiver to: Receive synchronization signals (SS) and physical broadcast channels (PBCH) from new radio (NR) cells, and Information indicating the starting predetermined resource for a continuous predetermined resource along the frequency direction is received, wherein SS and PBCH are received within said predetermined resource. For the predetermined resources in which SS and PBCH are received, the subcarrier spacing of SS and PBCH is predefined. The SS and PBCH are mapped to the predetermined resources based on the predefined subcarrier spacing of the SS and PBCH and the information therein. SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), and The predetermined resources used for SS and PBCH that are continuous along the frequency direction are represented by the number of multiple subcarriers along the frequency direction.

8. The electronic device of claim 7, wherein the subcarrier spacing of SS and PBCH is one of 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz or 60 kHz.

9. The electronic device of claim 7, wherein the processing circuitry is further configured to: Carrier aggregation is performed using the first and second cells, with Time Division Multiplexing (TDD) used for the first cell and Frequency Division Multiplexing (FDD) used for the second cell. Receives the SS and PBCH of one of the first and second cells.

10. A method for user equipment, the method comprising: Receive synchronization signals (SS) and physical broadcast channels (PBCH) from new radio (NR) cells, and Information indicating the starting predetermined resource for a continuous predetermined resource along the frequency direction is received, wherein SS and PBCH are received within said predetermined resource. For the predetermined resources in which SS and PBCH are received, the subcarrier spacing of SS and PBCH is predefined. The SS and PBCH are mapped to the predetermined resources based on the predefined subcarrier spacing of the SS and PBCH and the information therein. SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), and The predetermined resources used for SS and PBCH that are continuous along the frequency direction are represented by the number of multiple subcarriers along the frequency direction.

11. A method for a base station device, the method comprising: Transmit synchronization signals (SS) and physical broadcast channels (PBCH) for new radio (NR) cells, and Information is provided indicating the starting predetermined resource for a series of predetermined resources consecutive along the frequency direction, wherein the SS and PBCH are transmitted within said predetermined resource. For the predetermined resources in which SS and PBCH are transmitted, the subcarrier spacing of SS and PBCH is predefined. The SS and PBCH are mapped to the predetermined resources based on the predefined subcarrier spacing of the SS and PBCH and the information therein. SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), and The predetermined resources used for SS and PBCH that are continuous along the frequency direction are represented by the number of multiple subcarriers along the frequency direction.

12. A method for use in an electronic device, the method comprising: Receive synchronization signals (SS) and physical broadcast channels (PBCH) from new radio (NR) cells, and Receive information indicating the starting predetermined resource of a predetermined resource that is continuous along the frequency direction. SS and PBCH are received in the predetermined resources. For the predetermined resources in which SS and PBCH are received, the subcarrier spacing of SS and PBCH is predefined. The SS and PBCH are mapped to the predetermined resources based on the predefined subcarrier spacing of the SS and PBCH and the information therein. SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), and The predetermined resources used for SS and PBCH that are continuous along the frequency direction are represented by the number of multiple subcarriers along the frequency direction.

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