Communication device, communication method, and program

Abstract

This disclosure relates to communication apparatus, communication methods, and procedures. In a communication system where a base station device and a terminal device communicate, multiple uplink control channel configurations can be multiplexed in a more suitable manner. The communication apparatus includes: a communication unit for performing wireless communication; and a control unit for selectively switching between a first physical channel and a second physical channel to transmit control information to a base station. The first and second physical channels are assigned to predetermined time periods along a time direction, and the first and second physical channels have different conditions regarding the number of symbols and the number of resource blocks.

Description

[0001] This application is a divisional application of the invention patent application filed on June 21, 2017, with application number 201780048183.6, entitled "Communication Apparatus, Communication Method and Procedure". Technical Field

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

[0003] Radio access schemes and radio networks for cellular mobile communications (hereinafter also referred to as Long Term Evolution (LET), 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)) are under review in the 3rd Generation Partnership Project (3GPP). 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 cell-like manner. A single base station equipment can manage multiple cells.

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

[0005] Citation List

[0006] Non-patent literature

[0007] Non-patent document 1: 3rd Generation Partnership Project; TechnicalSpecification Group Radio Access Network; Study on Scenarios and Requirements for Next Generation Access Technologies; (Release 14), 3GPP TR 38.913V0.3.0 (2016-03).

[0008] <http: / / www.3gpp.org / ftp / / Specs / archive / 38_series / 38.913 / 38913-030.zip> Summary of the Invention

[0009] Technical issues

[0010] In wireless access technologies, it is preferable to flexibly design the capabilities of terminal devices according to usage scenarios, such as decoding downlink channels or generating uplink channels. From the perspective of frequency utilization efficiency, it is important to perform multiplexing of various flexibly designed wireless access technologies. Furthermore, depending on the capabilities of the terminal device being communicated with, it is preferable to also flexibly switch between uplink control channel configurations. However, it is difficult to reuse multiple uplink control channel configurations.

[0011] Therefore, this disclosure proposes a communication apparatus, communication method, and program that can reuse a configuration of multiple uplink control channels in a preferred mode in a communication system in which base station devices and terminal devices communicate with each other.

[0012] Solution to the problem

[0013] According to this disclosure, a communication apparatus is provided, comprising: a communication unit configured to perform wireless communication; and a control unit configured to selectively switch between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks in the first physical channel and the second physical channel are different from each other, and the first physical channel and the second physical channel are assigned to transmit control information to a base station during a predetermined time period in the time direction.

[0014] Additionally, according to this disclosure, a communication device is provided, comprising: a communication unit configured to perform wireless communication; and a notification unit configured to notify a terminal device of information regarding a switch between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks in the first physical channel and the second physical channel are different from each other, and the first physical channel and the second physical channel are assigned to receive control information from the terminal device during a predetermined time period in the time direction.

[0015] Additionally, according to this disclosure, a communication method is provided, comprising: performing wireless communication; and selectively switching between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks in the first physical channel and the second physical channel are different from each other, and the first physical channel and the second physical channel are assigned to transmit control information to a base station during a predetermined time period in the time direction.

[0016] Additionally, according to this disclosure, a communication method is provided, comprising: performing wireless communication; and notifying a terminal device of information regarding a switch between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks are different from each other in the first physical channel and the second physical channel, and the first physical channel and the second physical channel are assigned to receive control information from the terminal device during a predetermined time period in the time direction.

[0017] Additionally, according to this disclosure, a program is provided to enable a computer to perform the following steps: performing wireless communication; and selectively switching between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks in the first physical channel and the second physical channel are different from each other, and the first physical channel and the second physical channel are assigned to transmit control information to a base station during a predetermined time period in the time direction.

[0018] Additionally, according to this disclosure, a program is provided to cause a computer to perform the following steps: performing wireless communication; and notifying a terminal device of information regarding a switch between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks in the first physical channel and the second physical channel are different from each other, and the first physical channel and the second physical channel are assigned to receive control information from the terminal device during a predetermined time period in the time direction.

[0019] Beneficial effects of the present invention

[0020] According to the present invention, as described above, a communication apparatus, communication method, and program can be provided that allows for the multiplexing of multiple uplink control channels in a preferred mode within a communication system in which base station devices and terminal devices can communicate with each other.

[0021] Note that the effects described above are not necessarily limiting. Any of the effects described in this specification, or other effects that may be understood from this specification, can be achieved in conjunction with or in place of the effects described above. Attached Figure Description

[0022] Figure 1 This is a diagram illustrating an example of the configuration of a constituent carrier according to an embodiment of the present disclosure.

[0023] Figure 2 This is a diagram illustrating an example of the configuration of the constituent carriers according to an embodiment.

[0024] Figure 3 This is a diagram illustrating an example of a downlink subframe of LTE according to an embodiment.

[0025] Figure 4 This is a diagram illustrating an example of an uplink subframe of LTE according to an embodiment.

[0026] Figure 5 This is a diagram illustrating an example of a set of parameters related to transmitted signals in an NR cell.

[0027] Figure 6 This is a diagram illustrating an example of an NR downlink subframe in an embodiment.

[0028] Figure 7 This is a diagram illustrating an example of an NR uplink subframe in an embodiment.

[0029] Figure 8 This is a schematic block diagram illustrating the configuration of a base station apparatus according to an embodiment.

[0030] Figure 9 This is a schematic block diagram illustrating the configuration of a terminal device in an embodiment.

[0031] Figure 10 This is a diagram illustrating an example of downlink resource element mapping in LTE according to an embodiment.

[0032] Figure 11 This is a diagram illustrating an example of downlink resource element mapping for an NR according to an embodiment.

[0033] Figure 12 This is a diagram illustrating an example of downlink resource element mapping for an NR according to an embodiment.

[0034] Figure 13 This is a diagram illustrating an example of downlink resource element mapping for an NR according to an embodiment.

[0035] Figure 14 This is a diagram illustrating an example of a self-contained frame transmission configuration according to an embodiment.

[0036] Figure 15 This is an explanatory diagram illustrating an example of the configuration of the first NR-PUCCH.

[0037] Figure 16 This is an explanatory diagram illustrating another example of the configuration of the first NR-PUCCH.

[0038] Figure 17 This is an explanatory diagram illustrating an example of the configuration of the second NR-PUCCH.

[0039] Figure 18 This is an explanatory diagram illustrating another example of the configuration of the second NR-PUCCH.

[0040] Figure 19 This is an explanatory diagram illustrating an example of the logical-physical mapping of the first NR-PUCCH resource.

[0041] Figure 20 This is an explanatory diagram illustrating an example of the logical-physical mapping of the second NR-PUCCH resource.

[0042] Figure 21 This is an explanatory diagram illustrating another example of the logical-physical mapping of the second NR-PUCCH resource.

[0043] Figure 22 This is an explanatory diagram illustrating an example of time-domain multiplexing of the first NR-PUCCH and the second NR-PDCCH.

[0044] Figure 23 This is an explanatory diagram illustrating an example of frequency domain multiplexing of the first NR-PUCCH and the second NR-PUCCH.

[0045] Figure 24 This is a block diagram illustrating the first example of a schematic configuration of an eNB.

[0046] Figure 25 This is a block diagram illustrating a second example of a schematic configuration of an eNB.

[0047] Figure 26 This is a block diagram illustrating an example of a schematic configuration for a smartphone.

[0048] Figure 27This is a block diagram illustrating an example of a schematic configuration for a car navigation device. Detailed Implementation

[0049] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Note that in this specification and the drawings, structural elements having substantially the same function and structure are designated by the same reference numerals, and repeated descriptions of these structural elements are omitted.

[0050] Note that the descriptions will be presented in the following order.

[0051] 1. Example

[0052] 1.1. Overview

[0053] 1.2. Wireless Frame Configuration

[0054] 1.3. Channels and Signals

[0055] 1.4. Configuration

[0056] 1.5. Control Information and Control Channels

[0057] 1.6.CA and DC

[0058] 1.7. Resource Allocation

[0059] 1.8. Error Correction

[0060] 1.9. Resource Element Mapping

[0061] 1.10. Self-contained transmission

[0062] 1.11. Technical Features

[0063] 2. Application Examples

[0064] 2.1. Examples of applications related to base stations

[0065] 2.2. Application Examples Related to Terminal Devices

[0066] 3. Conclusion

[0067] <<1. Example>>

[0068] <1.1. Overview>

[0069] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. Note that structural elements having substantially the same function and structure are designated by the same reference numerals in this specification and the drawings, and repeated descriptions of these structural elements are omitted. Furthermore, the techniques, functions, methods, configurations, and processes described below, as well as all other descriptions, can be applied to both LTE and NR, unless otherwise specifically stated.

[0070] <Wireless communication system in this embodiment>

[0071] 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. Furthermore, the base station device 1 can connect to the evolved packet core (EPC) via an S1 interface. Additionally, the base station device 1 can connect to the Mobility Management Entity (MME) via an S1-MME interface and can connect to the Serving Gateway (S-GW) via an S1-U interface. The S1 interface supports many-to-many connections between the MME and / or 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.

[0072] <Wireless access technology in this embodiment>

[0073] 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 (consisting of a 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 secondary links. Furthermore, in the following description, a cell corresponding to LTE is referred to as an LTE cell, and a cell corresponding to NR is referred to as an NR cell.

[0074] Downlink communication is communication from base station device 1 to terminal device 2. Downlink transmission is transmission from base station device 1 to terminal device 2, and involves the transmission of downlink physical channels and / or downlink physical signals. Uplink communication is communication from terminal device 2 to base station device 1. Uplink transmission is transmission from terminal device 2 to base station device 1, and involves the transmission of uplink physical channels and / or uplink physical signals. Secondary link communication is communication from terminal device 2 to another terminal device 2. Secondary link transmission is transmission from terminal device 2 to another terminal device 2, and involves the transmission of secondary link physical channels and / or secondary link physical signals.

[0075] Sublink communication is defined for continuous direct detection and communication between terminal devices. Sublink communication can be used (with a frame configuration similar to that of the uplink and downlink). Furthermore, sublink communication can be limited to a subset of uplink and / or downlink resources.

[0076] Base station device 1 and terminal device 2 can support the use of a set of one or more cells for communication in the downlink, uplink, and / or secondary link. Communication using a set of multiple cells, or the aggregation of multiple cells, is also referred to as carrier aggregation or dual connectivity. Details of carrier aggregation and dual connectivity will be described below. Furthermore, each cell uses a predetermined frequency bandwidth. The maximum, minimum, and settable values ​​in the predetermined frequency bandwidth can be specified in advance.

[0077] Figure 1 This is a diagram illustrating an example of the configuration of the constituent carriers 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 primary and secondary cells, respectively. The two NR cells are integrated via carrier aggregation. Furthermore, the LTE and NR cells are integrated via dual connectivity. Note that the LTE and NR cells can be integrated via carrier aggregation. Figure 1 In this example, NR may not support some features, such as the ability to perform independent communication, because the connection may be assisted by an LTE cell acting as the primary cell. The ability to perform independent communication includes features necessary for initial connection establishment.

[0078] Figure 2 This is a diagram illustrating an example of the configuration of the constituent carriers according to this embodiment. Figure 2 In the example, two NR cells are configured. These two NR cells are designated as a primary and a secondary cell, respectively, and are integrated through carrier aggregation. In this case, the assistance of the LTE cell is not necessary when the NR cells support independent communication capabilities. Note that the two NR cells can be integrated through dual connectivity.

[0079] <1.2. Radio Frame Configuration>

[0080] <Radio frame configuration in this embodiment>

[0081] In this embodiment, a radio frame configured to last 10 ms 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.

[0082] Subframes include downlink subframes, uplink subframes, special subframes, and secondary link subframes.

[0083] 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 Period, and Uplink Pilot Time Slot (UpPTS). The total length of DwPTS, GP, and UpPTS is 1 ms. DwPTS is the field reserved for downlink transmission. UpPTS is the field reserved for uplink transmission. GP is the field where neither downlink nor uplink transmission is performed. Furthermore, special subframes may include only DwPTS and GP, or only GP and UpPTS. Special subframes are placed between downlink and uplink subframes in TDD and are used to perform handover from downlink to uplink subframes. Sublink subframes are subframes reserved or configured for sublink communication. Sublink is used for continuous direct communication and continuous direct detection between terminal devices.

[0084] A single radio frame includes downlink subframes, uplink subframes, special subframes, and / or sublink subframes. Alternatively, a single radio frame may consist only of downlink subframes, uplink subframes, special subframes, or sublink subframes.

[0085] Multiple radio frame configurations are supported. Radio frame configurations are defined by frame configuration types. Frame configuration type 1 can be applied only to FDD. Frame configuration type 2 can be applied only to TDD. Frame configuration type 3 can be applied only to the operation of Licensed Assisted Access (LAA) secondary cells.

[0086] Frame configuration type 2 specifies several uplink-downlink configurations. In an uplink-downlink configuration, 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 always reserved for downlink transmission. UpPTS and the subframe immediately following the special subframe are always reserved for uplink transmission.

[0087] In Frame Configuration Type 3, 10 subframes within a radio frame are reserved for downlink transmission. Terminal device 2 considers subframes from which it does not transmit PDSCH or detection signals as empty subframes. 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 that subframe. Downlink transmission is monopolized by one or more consecutive subframes. The first subframe for downlink transmission can begin from any of the subframes. The last subframe for downlink transmission can be completely monopolized or monopolized by the time interval specified in the DwPTS.

[0088] Furthermore, in frame configuration type 3, 10 subframes in a radio frame can be reserved for uplink transmission. Additionally, each of the 10 subframes in a radio frame can correspond to any one of the downlink subframe, uplink subframe, special subframe, and secondary link subframe.

[0089] Base station device 1 can transmit downlink physical channels and downlink physical 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 uplink physical channels and uplink physical signals in the UpPTS of a special subframe. Terminal device 2 can restrict the transmission of some of the uplink physical channels and uplink physical signals in the UpPTS of a special subframe.

[0090] Note that the time interval in a single transmission is called the Transmission Time Interval (TTI), and 1 ms (1 subframe) is defined as 1 TTI in LTE.

[0091] <LTE frame configuration in this embodiment>

[0092] 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 LTE downlink physical channels and / or LTE downlink physical signals to terminal device 2 in downlink subframes. Terminal device 2 can receive LTE downlink physical channels and / or LTE downlink physical signals from base station device 1 in downlink subframes.

[0093] 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 LTE uplink physical channels and / or LTE uplink physical signals to base station device 1 in uplink subframes. Base station device 1 can receive LTE uplink physical channels and / or LTE uplink physical signals from terminal device 2 in uplink subframes.

[0094] 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 in the frequency direction and multiple OFDM symbols in the time direction. In the uplink, the resource grid is defined by multiple subcarriers in the frequency direction and multiple SC-FDMA symbols in the time direction. The number of subcarriers or resource blocks can be determined based on 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 a normal CP or an extended CP. In a normal CP, the number of OFDM symbols or SC-FDMA symbols constituting a time slot is 7. In an 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). Furthermore, in the description of this embodiment, OFDM symbols or SC-FDMA symbols are also simply referred to as symbols.

[0095] 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 in the time domain by a predetermined number of consecutive symbols. A physical resource block is defined in the frequency domain by a predetermined number of consecutive subcarriers. The number of symbols and subcarriers in a physical resource block is determined based on parameters set according to the CP type, subcarrier spacing, and / or higher layers in the cell. For example, in the case of a normal CP type and a subcarrier spacing of 15kHz, a physical resource block contains 7 symbols and 12 subcarriers. 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).

[0096] In each LTE cell, a predetermined parameter is used in a subframe. For example, the predetermined parameter is a parameter (physical parameter) related to the transmitted signal. The 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.

[0097] In other words, in an LTE cell, both downlink and uplink signals are generated using a predetermined parameter within a predetermined time length (e.g., a subframe). In other words, in terminal device 2, it is assumed that both the downlink signal to be transmitted from base station device 1 and the uplink signal to be transmitted to base station device 1 are generated using a predetermined parameter within a predetermined time length. Furthermore, base station device 1 is configured such that both the downlink signal to be transmitted to terminal device 2 and the uplink signal to be transmitted from terminal device 2 are generated using a predetermined parameter within a predetermined time length.

[0098] <Frame configuration of NR in this embodiment>

[0099] In each NR cell, one or more predetermined parameters are used within a predetermined time length (e.g., a subframe). That is, in the NR cell, both downlink and uplink signals are generated using one or more predetermined parameters within a predetermined time length. In other words, in terminal device 2, it is assumed that both the downlink signal to be transmitted from base station device 1 and the uplink signal to be transmitted to base station device 1 are generated using one or more predetermined parameters within a predetermined time length. Furthermore, base station device 1 is configured such that both the downlink signal to be transmitted to terminal device 2 and the uplink signal to be transmitted from terminal device 2 are generated using one or more predetermined parameters within a predetermined time length. When multiple predetermined parameters are used, 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).

[0100] In NR cells, multiple sets of parameters can be predefined among the combinations of predefined parameters.

[0101] Figure 5 This is a diagram illustrating an example of a set of parameters related to transmitted signals in an NR cell. Figure 5 In the example, the parameters included in the parameter set for the transmitted signal include the subcarrier spacing, the number of subcarriers per resource block in the NR cell, the number of symbols per 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.

[0102] The set of parameters related to transmission signals in an NR cell can be specified separately for the downlink and uplink. Furthermore, the set of parameters related to transmission signals in an NR cell can be set independently for the downlink and uplink.

[0103] Figure 6This 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 undergo 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 downlink physical channel and / or NR downlink physical signal to terminal device 2 in a downlink subframe. Terminal device 2 can receive the NR downlink physical channel and / or NR downlink physical signal from base station device 1 in a downlink subframe.

[0104] 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 undergo 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 uplink physical channel and / or NR uplink physical signal to terminal device 2 in the uplink subframe. Terminal device 2 can receive the NR uplink physical channel and / or NR uplink physical signal from base station device 1 in the uplink subframe.

[0105] <Antenna port in this embodiment>

[0106] An antenna port is defined such that the propagation channel carrying a certain symbol can be inferred from the propagation channel carrying another symbol in the same antenna port. For example, different physical resources in the same antenna port can be assumed to be 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. Moreover, each reference signal can define multiple antenna ports.

[0107] Antenna ports are designated or identified by antenna port numbers. For example, antenna ports 0 through 3 are the antenna ports 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.

[0108] Two antenna ports can be considered quasi-co-located (QCL) if certain predetermined conditions are met. These conditions are that the wide-area characteristics of the propagation channel of a carrier symbol in one antenna port can be inferred from the propagation channel of a carrier symbol in the other antenna port. Wide-area characteristics include delay dispersion, Doppler spread, Doppler shift, average gain, and / or average delay.

[0109] 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 the antenna ports used to transmit CRS. In NR, antenna ports 0 to 3 can be configured as antenna ports used to transmit CRS similar to those in LTE. Furthermore, in NR, antenna ports similar to those used in LTE to transmit CRS can be configured with antenna port numbers different from those of antenna ports 0 to 3. In the description of this embodiment, predetermined antenna port numbers can be applied to LTE and / or NR.

[0110] <1.3. Channels and Signals>

[0111] <Physical channels and physical signals in this embodiment>

[0112] In this embodiment, physical channels and physical signals are used. Physical channels include downlink physical channels, uplink physical channels, and secondary link physical channels. Physical signals include downlink physical signals, uplink physical signals, and secondary link physical signals.

[0113] 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.

[0114] <NR physical channel and NR physical signal in this embodiment>

[0115] The descriptions of physical channels and physical signals in LTE can also be applied to NR physical channels and NR physical signals, respectively. NR physical channels and NR physical signals are referred to below.

[0116] The NR uplink physical channels include NR-PUSCH (Physical Uplink Shared Channel), NR-PUCCH (Physical Uplink Control Channel), and NR-PRACH (Physical Random Access Channel).

[0117] 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.

[0118] The NR physical uplink channels include NR-PUSCH, NR-PUCCH, and NR-PRACH.

[0119] The NR physical uplink signal includes NR-UL-RS. NR-UL-RS includes NR-UL-DMRS, NR-SRS, etc.

[0120] The NR physical secondary link channels include NR-PSBCH, NR-PSCCH, NR-PSDCH, and NR-PSSCH.

[0121] <Downlink physical channel in this embodiment>

[0122] The PBCH is used to broadcast the Master Information Block (MIB), which is broadcast information specific to the serving cell of base station device 1. The PBCH is transmitted only in subframe 0 of a radio frame. The MIB can be updated at 40ms intervals. The PBCH is transmitted repeatedly at a period of 10ms. 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 retransmission (repetition) of the MIB is performed 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.

[0123] PCFICH is used to transmit information related to the number of OFDM symbols used to transmit PDCCH. The area indicated by PCFICH is also called the PDCCH area. The information transmitted via PCFICH is also called the Control Format Indicator (CFI).

[0124] The PHICH is used to send HARQ-ACK (HARQ indicator, HARQ feedback, response information, and HARQ (Hybrid Automatic Repeat Request)). HARQ indicates an acknowledgment (ACK) or a negative acknowledgment (NACK) for the uplink data (Uplink Shared Channel (UL-SCH)) received by base station device 1. For example, if a HARQ-ACK indicating ACK is received by terminal device 2, the corresponding uplink data is not retransmitted. Conversely, if terminal device 2 receives a HARQ-ACK indicating NACK, it retransmits the corresponding uplink data through a predetermined uplink subframe. A specific PHICH sends a HARQ-ACK for a specific uplink data. Base station device 1 uses multiple PHICHs to send each HARQ-ACK for multiple uplink data items included in the same PUSCH.

[0125] 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 allocations or downlink assignments.

[0126] The PDCCH is transmitted through a set of one or more consecutive Control Channel Elements (CCEs). Each CCE consists of nine Resource Element Groups (REGs). Each REG consists of four Resource Elements. When the PDCCH consists of n consecutive CCEs, it begins with the CCE that satisfies the condition that the remainder after dividing the index (number) i of the CCE by n is 0.

[0127] The EPDCCH is transmitted through a set of one or more consecutive Enhanced Control Channel Elements (ECCEs). Each ECCE consists of multiple Enhanced Resource Element Groups (EREGs).

[0128] Downlink grants are used to schedule PDSCHs within a cell. Downlink grants are also used to schedule PDSCHs in the same subframe as the subframe from which the downlink grant was sent. Uplink grants are used to schedule PUSCHs within a cell. Uplink grants are used to schedule a single PUSCH in the fourth subframe or subsequent subframes starting from the subframe from which the uplink grant was sent.

[0129] 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. An RNTI can be an identifier pre-defined in the specification, an identifier set to information specific to the cell, an identifier set to information specific to terminal device 2, or an identifier set to information specific to the group to which terminal device 2 belongs. For example, during PDCCH or EPDCCH monitoring, 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 the DCI used by terminal device 2.

[0130] The PDSCH is used to transmit downlink data (or downlink shared channel (DL-SCH)). In addition, the PDSCH is also used to transmit higher-layer control information.

[0131] PMCH is used to send multicast data (Multicast Channel (MCH)).

[0132] 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.

[0133] <Downlink physical signals in this embodiment>

[0134] Synchronization signals are used to enable 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, synchronization signals are placed in subframes 0, 1, 5, and 6 of the radio frame. In an FDD scheme, synchronization signals are placed in subframes 0 and 5 of the radio frame.

[0135] PSS can be used for coarse frame / symbol timing synchronization (synchronization in the time domain) or cell identification group identification. SSS can be used for more accurate frame timing synchronization, cell identification, or CP length detection. In other words, PSS and SSS can be used to perform frame timing synchronization and cell identification.

[0136] The downlink reference signal is used to enable 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 in the downlink physical channel.

[0137] CRS is transmitted throughout the entire band of the subframe. CRS is used to receive (demodulate) PBCH, PDCCH, PHICH, PCFICH, and PDSCH. CRS can be used to enable terminal device 2 to calculate downlink channel state information. PBCH, PDCCH, PHICH, and PCFICH are transmitted through the antenna ports used to transmit CRS. CRS supports configurations with one, two, or four antenna ports. CRS is transmitted through one or more of antenna ports 0 to 3.

[0138] The URS associated with the PDSCH is transmitted via the bands and subframes used to transmit the PDSCH associated with the URS. The URS is used for demodulation of the PDSCH associated with the URS. The URS associated with the PDSCH is transmitted via one or more of antenna ports 5 and 7 through 14.

[0139] PDSCH is transmitted through the antenna port used for transmitting CRS or URS, based on the transmission mode and DCI format. DCI format 1A is used to schedule PDSCH transmissions through the antenna port used for transmitting CRS. DCI format 2D is used to schedule PDSCH transmissions through the antenna port used for transmitting URS.

[0140] The DMRS associated with the EPDCCH is transmitted via the bands and subframes used to transmit the EPDCCH associated with the DMRS. The DMRS is used for demodulation of the EPDCCH associated with the DMRS. The EPDCCH is transmitted via the antenna ports used to transmit the DMRS. The DMRS associated with the EPDCCH is transmitted via one or more of antenna ports 107 to 114.

[0141] CSI-RS is transmitted via configured subframes. 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 some or all of the settings for antenna ports 1, 2, 4, 8, 12, 16, 24, and 32. CSI-RS is transmitted via one or more of antenna ports 15 to 46. Furthermore, 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.

[0142] ZP CSI-RS resources are configured by higher layers. ZP CSI-RS resources are transmitted with zero output power. In other words, ZP CSI-RS resources may not transmit anything. ZP PDSCH and EPDCCH are not transmitted in the ZP CSI-RS resources. For example, ZP CSI-RS resources are used to enable neighboring cells to transmit NZP CSI-RS. Furthermore, for example, ZP CSI-RS resources are used for measuring CSI-IM. Additionally, for example, ZP CSI-RS resources are not used to transmit predetermined channels (such as PDSCH). In other words, apart from ZP CSI-RS resources, the predetermined channels are mapped (to achieve rate matching or truncation).

[0143] <Uplink physical signals in this embodiment>

[0144] 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 (transport blocks (TBs) or downlink shared channel (DL-SCH)). HARQ-ACKs are also known as ACK / NACKs, HARQ feedback, or response information. Furthermore, HARQ-ACKs for downlink data indicate ACK, NACK, or DTX.

[0145] 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. Furthermore, the PUSCH can be used to transmit only channel state information or only HARQ-ACK and channel state information.

[0146] PRACH is a physical channel used to transmit random access preambles. PRACH can be used to synchronize terminal device 2 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 reconstruction process, synchronization (timing adjustment) for uplink transmissions, and / or requests for PUSCH resources.

[0147] 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.

[0148] <Physical resources used for the control channel in this embodiment>

[0149] 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 within the same OFDM symbol and not used for CRS within the same resource block. Furthermore, a REG consists of the first to fourth OFDM symbols in the first time slot of a subframe.

[0150] Enhanced Resource Element Groups (EREGs) are used to define the mapping between resource elements and enhanced control channels. For example, an EREG is 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.

[0151] <1.4. Configuration>

[0152] <Configuration example of base station device 1 in this embodiment>

[0153] Figure 8 This is a schematic block diagram illustrating the configuration of the base station device 1 according to this embodiment. As shown, the base station device 1 includes a higher-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. Furthermore, 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.

[0154] 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 configured individually according to the RAT. For example, the receiving unit 105 and the transmitting unit 107 are configured individually in LTE and NR. Furthermore, in an NR cell, Figure 8 Some or all of the units included in the base station apparatus 1 shown can be configured individually 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 configured individually according to a set of parameters related to the transmitted signal.

[0155] 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. Furthermore, the higher-layer processing unit 101 generates control information for controlling the receiving unit 105 and the transmitting unit 107, and outputs this control information to the control unit 103.

[0156] 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 this control information to the higher-layer processing unit 101. The control unit 103 receives the decoded signal from the decoding unit 1051 and receives the 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 can be used to control all or part of the base station device 1.

[0157] The higher-layer processing unit 101 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 101 are performed for each terminal device, or shared by terminal devices connected to the base station device. The processing and management in the higher-layer processing unit 101 can be performed solely by the higher-layer processing unit 101, or it can be obtained from another base station device or a higher node. Furthermore, the processing and management in the higher-layer processing unit 101 can be performed independently according to the RAT. For example, the higher-layer processing unit 101 independently performs processing and management in LTE and NR.

[0158] 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 the NR cell.

[0159] In the radio resource control within the higher-layer processing unit 101, the generation and / or management of downlink data (transmission blocks), system information, RRC messages (RRC parameters), and / or MAC control elements (CEs) are performed.

[0160] 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 traffic 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.

[0161] In the scheduling control within the higher-layer processing unit 101, the frequency and subframes assigned to the physical channel, the decoding rate, the modulation scheme, and the transmission power of the physical channel are determined based on the channel state information, estimates, channel quality, and other similar information received from the channel measurement unit 1059. For example, the control unit 103 generates control information (DCI format) based on the scheduling results from the scheduling control in the higher-layer processing unit 101.

[0162] In the CSI report control of the high-level processing unit 101, the CSI reports of the terminal device 2 are controlled. For example, settings related to the CSI reference resources used in calculating the CSI in the terminal device 2 are controlled.

[0163] 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-defined settings or settings notified from the base station device 1 to the terminal device 2.

[0164] The wireless receiving unit 1057 performs the following actions: switching to intermediate frequency (down-conversion), removing unnecessary frequency components, controlling the amplification level to maintain the signal level appropriately, performing quadrature demodulation based on the in-phase and quadrature components of the received signal, converting from analog to digital signal, removing guard interval (GI), and / or extracting the signal in the frequency domain by performing a fast Fourier transform (FFT) on the uplink signal received via the transceiver antenna 109.

[0165] Demultiplexing unit 1055 separates the uplink channel (e.g., PUCCH or PUSCH) and / or the 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 uplink channel propagation path based on the propagation path estimate input from channel measurement unit 1059.

[0166] The demodulation unit 1053 uses a modulation scheme (such as binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), hexadecimal quadrature amplitude modulation (QAM), 64QAM, or 256QAM) to demodulate the received signal against the modulation symbols of the uplink channel. The demodulation unit 1053 performs the separation and demodulation of the MIMO multiplexed uplink channel.

[0167] 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 for each transport block.

[0168] The channel measurement unit 1059 measures the estimated propagation path, channel quality, etc., based on the uplink reference signal input from the demultiplexing unit 1055, and outputs the estimated propagation path, channel quality, etc., to the demultiplexing unit 1055 and / or the control unit 103. For example, the estimated propagation path used for propagation path compensation of PUCCH or PUSCH is measured by the channel measurement unit 1059 using UL-DMRS, and the uplink channel quality is measured using SRS.

[0169] Under the control of the control unit 103, the transmitting unit 107 performs transmission processing on the downlink control information and downlink data input from the higher-layer processing unit 101, such as encoding, modulation, and multiplexing. For example, the transmitting unit 107 generates and multiplexes PHICH, PDCCH, EPDCCH, PDSCH, and downlink reference signals, and generates a transmission signal. Furthermore, the transmission processing in the transmitting unit 107 is performed based on predefined 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.

[0170] Encoding unit 1071 encodes the HARQ indicator (HARQ-ACK), downlink control information, and downlink data input from control unit 103 using a predetermined decoding scheme (e.g., block decoding, convolutional decoding, turbo decoding, etc.). Modulation unit 1073 modulates the coded bits input from encoding unit 1071 using a predetermined modulation scheme (e.g., BPSK, QPSK, 16QAM, 64QAM, or 256QAM). Downlink reference signal generation unit 1079 generates a downlink reference signal based on physical cell identifier (PCI), RRC parameters set in terminal device 2, etc. Multiplexing unit 1075 multiplexes the downlink reference signal and modulated symbols for each channel and arranges the resulting data in predetermined resource elements.

[0171] The wireless transmitting unit 1077 performs processing and generates a transmitted signal. This processing includes, for example, converting the signal to the time domain using an inverse fast Fourier transform (IFFT), adding a guard interval, generating a baseband digital signal, converting the signal to an analog signal, quadrature modulation, converting the intermediate frequency signal to a high frequency signal (upconversion), removing additional frequency components, and amplifying the signal from the multiplexing unit 1075. The transmitted signal output from the wireless transmitting unit 1077 is transmitted via the transceiver antenna 109.

[0172] <Configuration example of terminal device 2 in this embodiment>

[0173] Figure 9 This is a schematic block diagram illustrating the configuration of the terminal device 2 in this embodiment. As shown, the terminal device 2 includes a higher-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. Furthermore, 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.

[0174] As described above, terminal device 2 may support one or more RATs. Figure 9 Some or all of the units included in the terminal device 2 shown can be configured individually according to the RAT. For example, the receiving unit 205 and the transmitting unit 207 are configured individually in LTE and NR. Furthermore, in an NR cell, Figure 9 Some or all of the units included in the terminal device 2 shown can be configured individually according to a set of parameters related to the transmitted signal. For example, in a certain NR cell, the radio receiving unit 2057 and the radio transmitting unit 2077 can be configured individually according to a set of parameters related to the transmitted signal.

[0175] The higher-layer processing unit 201 outputs the uplink output (transmission block) 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. Furthermore, 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.

[0176] The control unit 203 controls the receiving unit 205 and the transmitting unit 207 based on control information from the higher-level processing unit 201. The control unit 203 generates control information to be sent to the higher-level processing unit 201 and outputs this control information to the higher-level processing unit 201. The control unit 203 receives the decoded signal from the decoding unit 2051 and receives the 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.

[0177] The higher-layer processing unit 201 performs processing and management related to RAT control, radio resource control, subframe setup, scheduling control, and / or CSI reporting control. The processing and management in the higher-layer processing unit 201 are performed based on predefined settings and / or settings based on control information notified or set 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 independently based on the RAT. For example, the higher-layer processing unit 201 can independently perform processing and management in LTE and NR.

[0178] Under the RAT control of the higher-level processing unit 201, management related to RATI is performed. For example, under RAT control, management related to LTE and / or management related to NR are performed. Management related to NR includes the setting and processing of parameter sets related to transmitted signals in NR cells.

[0179] 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 (transmission blocks), system information, RRC messages (RRC parameters), and / or MAC control elements (CEs) are performed.

[0180] 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 for subframes, 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.

[0181] In the scheduling control of the high-layer processing unit 201, control information for controlling the scheduling of the receiving unit 205 and the transmitting unit 207 is generated based on the DCI (scheduling information) from the base station device 1.

[0182] In the CSI report control within the higher-layer processing unit 201, controls related to CSI reporting for the base station device 1 are executed. For example, the CSI report control controls settings related to the CSI reference resources used for calculating the CSI for the channel measurement unit 2059. The CSI report control also controls the resources (timing) used for reporting CSI based on DCI and / or RRC parameters.

[0183] 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. Furthermore, the reception processing in the receiving unit 205 is performed based on pre-defined settings or notifications or settings from the base station device 1.

[0184] The wireless receiver unit 2057 performs the following actions: switching to intermediate frequency (down-conversion), removing unnecessary frequency components, controlling the amplification level to maintain the signal level appropriately, performing quadrature demodulation based on the in-phase and quadrature components of the received signal, converting from analog to digital signal, removing guard interval (GI), and / or extracting the signal in the frequency domain by performing a fast Fourier transform (FFT) on the uplink signal received via the transceiver antenna 109.

[0185] Demultiplexing unit 2055 separates the downlink channel (e.g., PHICH, PDCCH, EPDCCH, or PDSCH), downlink synchronization signal, and / or downlink reference signal from the signal input from wireless receiving unit 2057. Demultiplexing unit 2055 outputs the uplink reference signal to channel measurement unit 2059. Demultiplexing unit 2055 compensates for the uplink channel propagation path based on the propagation path estimate input from channel measurement unit 2059.

[0186] The demodulation unit 2053 demodulates the received signal using a modulation scheme (such as BPSK, QPSK, 16QAM, 64QAM, or 256QAM) for the modulation symbols of the downlink channel. The demodulation unit 2053 performs the separation and demodulation of the MIMO multiplexed downlink channel.

[0187] 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 PUSCH for each transport block.

[0188] The channel measurement unit 2059 measures propagation path estimates, channel quality, etc., based on the downlink reference signal input from the demultiplexing unit 2055, and outputs the propagation path estimates, channel quality, etc., to the demultiplexing unit 2055 and / or the control unit 203. The downlink reference signal used for measurement by the channel measurement unit 2059 can be determined at least based on the transmission mode set by RRC parameters and / or other RRC parameters. For example, the propagation path estimate used for performing propagation path compensation on the PDSCH or EPDCCH is measured by DL-DMRS. The propagation path estimate used for performing propagation path compensation on the PDCCH or PDSCH and / or the downlink channel used for reporting CSI is measured by CRS. The downlink channel used for reporting CSI is measured by 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.

[0189] Under the control of the control unit 203, the transmitting unit 207 performs transmission processing on the uplink control information and uplink data input from the higher-layer processing unit 201, such as encoding, modulation, and multiplexing. 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. Furthermore, the transmission processing in the transmitting unit 207 is performed based on predefined settings or settings set or notified by the base station device 1.

[0190] Encoding unit 2071 encodes the HARQ indicator (HARQ-ACK), uplink control information, and uplink data input from control unit 203 using a predetermined decoding scheme (e.g., block decoding, convolutional decoding, turbo decoding, etc.). Modulation unit 2073 modulates the coded bits input from encoding unit 2071 using a predetermined modulation scheme (e.g., BPSK, QPSK, 16QAM, 64QAM, or 256QAM). Uplink reference signal generation unit 2079 generates an uplink reference signal based on RRC parameters set in terminal device 2. Multiplexing unit 2075 multiplexes the uplink reference signal and modulated symbols for each channel and arranges the resulting data in predetermined resource elements.

[0191] The wireless transmitting unit 2077 performs processing and generates a transmitted signal. This processing includes, for example, converting the signal to the time domain using an inverse fast Fourier transform (IFFT), adding a guard interval, generating a baseband digital signal, converting the signal to an analog signal, quadrature modulation, converting the intermediate frequency signal to a high frequency signal (upconversion), removing additional frequency components, and amplifying the signal from the multiplexing unit 1075. The transmitted signal output from the wireless transmitting unit 2077 is transmitted via the transceiver antenna 209.

[0192] <1.5. Control Information and Control Channels>

[0193] <Signaling of control information in this embodiment>

[0194] Base station device 1 and terminal device 2 can use various methods for signaling (notification, broadcast, or setting) of control information. Control information signaling can be executed at various layers (multiple layers). Control information signaling includes physical layer signaling, RRC signaling, and MAC signaling. Physical layer signaling is executed at the physical layer, RRC signaling at the RRC layer, and MAC signaling at the MAC layer. RRC signaling is a dedicated RRC signaling used to notify terminal device 2 of specific control information, or a shared RRC signaling used to notify control information specific 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.

[0195] RRC signaling is implemented by signaling RRC parameters. MAC signaling is implemented by signaling MAC control elements. Physical layer signaling is implemented by signaling downlink control information (DCI) or uplink control information (UCI). RRC parameters and MAC control elements are sent using PDSCH or PUSCH. DCI is sent using PDCCH or EPDCCH. UCI is sent using PUCCH or PUSCH. RRC and MAC signaling are used to signal semi-static control information and are also known as semi-static signaling. Physical layer signaling is used to signal dynamic control information and is also known as dynamic signaling. DCI is used for scheduling PDSCH or scheduling PUSCH. UCI is used for CSI reports, HARQ-ACK reports, and / or scheduling requests (SR).

[0196] <Details of the downlink control information in this embodiment>

[0197] DCI is a notification using a DCI format with predefined fields. Predefined information bits are mapped to fields specified in the DCI format. DCI notifies downlink scheduling information, uplink scheduling information, secondary link scheduling information, requests for aperiodic CSI reports, or uplink transmit power commands.

[0198] 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 vary depending on the transmission mode. For example, terminal device 2 with downlink transmission mode 1 configured monitors DCI format 1A and DCI format 1. For example, terminal device 2 with downlink transmission mode 4 configured monitors DCI format 1A and DCI format 2. For example, terminal device 2 with uplink transmission mode 1 configured monitors DCI format 0. For example, terminal device 2 with uplink transmission mode 2 configured monitors DCI format 0 and DCI format 4.

[0199] The control area containing the PDCCH used to notify the DCI to terminal device 2 is not notified, and terminal device 2 detects the DCI for terminal device 2 through blind decoding (blind detection). Specifically, terminal device 2 monitors the set of PDCCH candidates in the serving cell. The monitoring instruction attempts to decode all DCI formats for each PDCCH in the set. For example, terminal device 2 attempts to decode all aggregation levels, PDCCH candidates, and DCI formats that may be sent to terminal device 2. Terminal device 2 identifies the successfully decoded (detected) DCI (PDCCH) as the DCI (PDCCH) for terminal device 2.

[0200] Cyclic Redundancy Check (CRC) is added to the DCI. CRC is used for DCI error detection and blind DCI detection. The CRC parity bit (CRC) is scrambled using RNTI. Terminal device 2 uses RNTI to detect whether it is a DCI for terminal device 2. Specifically, terminal device 2 uses a predetermined RNTI to descramble the bits corresponding to the CRC, extract the CRC, and detect whether the corresponding DCI is correct.

[0201] RNTIs are defined or set according to the purpose or function of DCI. RNTIs include Cell-RNTI (C-RNTI), Semi-Persistent 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), eIMTA-RNTI, and CC-RNTI.

[0202] C-RNTI and SPS C-RNTI are RNTIs specific to terminal device 2 in base station device 1 (cell) and are used as identifiers to identify terminal device 2. C-RNTI is used to schedule PDSCH or PUSCH in a subframe. SPS C-RNTI is used to activate or release periodic scheduling of resources for PDSCH or PUSCH. A control channel with a CRC scrambled using SI-RNTI is used to schedule System Information Blocks (SIBs). A control channel with a CRC scrambled using P-RNTI is used to control paging. A control channel with a CRC scrambled using RA-RNTI is used to schedule responses to RACH. A control channel with a CRC scrambled using TPC-PUCCH-RNTI is used for PUCCH power control. A control channel with a CRC scrambled using TPC-PUSCH-RNTI is used for PUSCH power control. A control channel with a CRC scrambled using temporary C-RNTI is used by mobile station devices that do not set or identify C-RNTI. A control channel with a CRC scrambled using M-RNTI is used to schedule MBMS. A control channel with a CRC scrambled using eIMTA-RNTI is used to notify information related to the TDD UL / DL settings of the TDD serving cell in Dynamic TDD (eIMTA). A control channel (DCI) with a CRC scrambled using CC-RNTI is used to notify the setting of proprietary OFDM symbols in LAA secondary cells. Furthermore, the DCI format can be scrambled using a new RNTI instead of the above.

[0203] Scheduling information (downlink scheduling information, uplink scheduling information, and secondary link scheduling information) includes scheduling information as frequency regions, and scheduling information in units of resource blocks or resource block groups. 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 a resource block group is determined by the system bandwidth.

[0204] <Details of the downlink control channel in this embodiment>

[0205] DCI is transmitted using a control channel (such as PDCCH or EPDCCH). Terminal device 2 monitors the PDCCH candidate set and / or EPDCCH candidate set of one or more active serving cells set via RRC signaling. Here, monitoring means attempting to decode the PDCCH and / or EPDCCH in the sets corresponding to all monitored DCI formats.

[0206] The PDCCH candidate set or EPDCCH candidate set is also referred to as the search space. Within the search space, a shared search space (CSS) and a terminal-specific search space (USS) are defined. The CSS can be defined only for the search space used for PDCCH.

[0207] The shared search space (CSS) is a search space based on parameters specific to base station device 1 and / or predefined parameter settings. For example, the CSS is a search space shared by multiple terminal devices. Therefore, base station device 1 maps the control channel shared by multiple terminal devices to the CSS, thus reducing the resources used to transmit the control channel.

[0208] The UE-specific search space (USS) is a search space that uses at least the parameter settings specific to terminal device 2. Therefore, the USS is a search space specific to terminal device 2, and base station device 1 can use the USS to transmit control channels specific to terminal device 2 independently. For this reason, base station device 1 can efficiently map control channels specific to multiple terminal devices.

[0209] The USS can be set to be shared by multiple terminal devices. Because the shared USS is set across multiple terminal devices, parameters specific to terminal device 2 are set to the same values ​​across all terminal devices. For example, the unit for setting the same parameters across multiple terminal devices is cell, transmitting point, or a group of predetermined terminal devices.

[0210] The search space for each aggregation level is defined by the PDCCH candidate set. Each PDCCH is sent using one or more CCE sets. The number of CCEs used in a PDCCH is also referred to as the aggregation level. For example, a PDCCH may use 1, 2, 4, or 8 CCEs.

[0211] The search space for each aggregation level is defined by the EPDCCH candidate set. Each EPDCCH is transmitted using one or more Enhanced Control Channel Elements (ECCEs). The number of ECCEs used in an EPDCCH is also referred to as the aggregation level. For example, an EPDCCH may use 1, 2, 4, 8, 16, or 32 ECCEs.

[0212] The number of PDCCH candidates, or EPDCCH candidates, is determined at least based on the search space and aggregation level. For example, in CSS, the number of PDCCH candidates in aggregation levels 4 and 8 are 4 and 2, respectively. For example, in USS, the number of PDCCH candidates in aggregations 1, 2, 4, and 8 are 6, 6, 2, and 2, respectively.

[0213] Each ECCE includes multiple EREGs. EREGs are used to define the mapping to resource elements of the EPDCCH. Sixteen EREGs, numbered 0 to 15, are defined within each RB pair. In other words, EREG 0 to EREG 15 are defined within each RB pair. For each RB pair, EREG 0 to EREG 15 are preferentially defined at regular intervals in the frequency direction for resource elements other than those to which predetermined signals and / or channels are mapped. For example, resource elements to which demodulation reference signals associated with the EPDCCH transmitted through antenna ports 107 to 110 are mapped are not defined as EREGs.

[0214] 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 referred to as the aggregation level. For example, the number of ECCEs used in an EPDCCH is determined based on the number of resource elements that can be used to send the EPDCCH in an RB pair, the EPDCCH transmission method, etc. For example, the number of ECCEs used in an EPDCCH can be 1, 2, 4, 8, 16, or 32. Furthermore, the number of EREGs used in an ECCE is determined based on the subframe type and the cyclic prefix type, and is either 4 or 8. Distributed transmission and localized transmission are supported as EPDCCH transmission methods.

[0215] Distributed or localized transmission can be used for EPDCCH. The difference between distributed and localized transmission lies in the mapping of ECCEs to EREG and RB pairs. For example, in distributed transmission, an ECCE is configured with EREGs using multiple RB pairs. In localized transmission, an ECCE is configured with EREGs using only one RB pair.

[0216] 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. The RB pair set for the EPDCCHs monitored by terminal device 2 can be set. The RB pair set is also referred to as an EPDCCH set or EPDCCH-PRB set. One or more EPDCCH sets can be set in terminal device 2. Each EPDCCH set includes one or more RB pairs. Furthermore, EPDCCH-related settings can be set individually for each EPDCCH set.

[0217] 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 an ECCE set. 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.

[0218] <1.6.CA and DC>

[0219] <Details of CA and DC in this embodiment>

[0220] Terminal device 2 is configured with multiple cells, and terminal device 2 can perform multi-carrier transmission. Communication using multiple cells by terminal device 2 is called 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 called serving cells.

[0221] In CA, the multiple serving cells to be configured include one primary cell (PCell) and one or more secondary cells (SCell). One primary cell and one or more secondary cells can be configured in a CA-enabled terminal device 2.

[0222] A primary cell is the serving cell in which the initial connection establishment procedure is performed, the serving cell that initiates the initial connection establishment procedure, or the cell designated as the primary cell during handover. Primary cells operate at the primary frequency. Secondary cells can be established after a connection is constructed or reconstructed. Secondary cells operate at the secondary frequency. Furthermore, the connection is also referred to as an RRC connection.

[0223] DC is the operation by which a predetermined terminal device 2 consumes radio resources provided from at least two different network points. The 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, the two network points can be connected via a non-ideal backhaul.

[0224] In the DC, base station device 1, which is at least connected to the S1-MME and acts as a mobile anchor point in the core network, is referred to as the primary base station device. Furthermore, base station device 1 that is not a primary base station device but provides additional radio resources to terminal device 2 is referred to as a secondary base station device. A group of serving cells associated with the primary base station device is also referred to as a primary cell group (MCG). A group of serving cells associated with the secondary base station device is also referred to as a secondary cell group (SCG). Note that this group of serving cells is also referred to as a cell group (CG).

[0225] In a Data Center (DC), the primary cell belongs to the MCG. Furthermore, in an SCG, 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 the PCell) can be supported by a PSCell. Additionally, a PSCell may only support some of the functions of a PCell. For example, a PSCell can use a search space different from the CSS or USS to support the function of performing PDCCH transmission. Furthermore, a PSCell can remain active at all times. Moreover, a PSCell is a cell capable of receiving PUCCH.

[0226] In the DC, radio bearers (data radio bearers (DRB)) and / or signaling radio bearers (SRB) can be assigned separately via MeNB and SeNB. The duplex mode can be set independently in each of the MCG (PCell) and SCG (PSCell). The MCG (PCell) and SCG (PSCell) do not need to be synchronized with each other. That is, the frame boundaries of the MCG and the frame boundaries of the SCG may not match. Parameters for adjusting multiple timings (Timing Advance Groups (TAGs)) can be set independently in the MCG (PCell) and SCG (PSCell). In a duplex connection, 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, the transmission method using PUCCH and / or PUSCH is applied to each cell group.

[0227] PUCCH and PBCH (MIB) are transmitted only via PCell or PSCell. Furthermore, PRACH is also transmitted only via PCell or PSCell, provided that multiple tags are not configured between cells in the CG.

[0228] In a PCell or PSCell, semi-persistent scheduling (SPS) or discontinuous transmission (DRX) can be performed. In a secondary cell, the same DRX as in the PCell or PSCell within the same cell group can be performed.

[0229] In secondary cells, MAC settings and related information / parameters are largely shared with the PCell or PSCell within 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.

[0230] In CA, cells applying TDD schemes and cells applying FDD schemes can be aggregated. When cells applying TDD and cells applying FDD are aggregated, this disclosure can be applied to either the cells applying TDD or the cells applying FDD.

[0231] Terminal device 2 will send information indicating the combination of bands in which CA and / or DC are supported by terminal device 2 (the supported band combinations) to base station device 1. For each band combination, terminal device 2 will send information indicating whether simultaneous transmission and reception in multiple serving cells across multiple different bands to base station device 1.

[0232] <1.7. Resource Allocation>

[0233] <Details of resource allocation in this embodiment>

[0234] Base station device 1 can use various methods to allocate PDSCH and / or PUSCH resources to terminal device 2. Resource allocation methods include dynamic scheduling, semi-persistent scheduling, multi-subframe scheduling, and cross-subframe scheduling.

[0235] In dynamic scheduling, a DCI performs resource allocation within a subframe. Specifically, the PDCCH or EPDCCH in a subframe schedules the PDSCH in that subframe. The PDCCH or EPDCCH in a subframe schedules the PUSCH in a predetermined subframe following that subframe.

[0236] In multi-subframe scheduling, a DCI allocates resources across one or more subframes. Specifically, the PDCCH or EPDCCH in a given subframe schedules the PDSCH in one or more subframes following that subframe. The PDCCH or EPDCCH in a given subframe schedules the PUSCH in one or more subframes following that subframe. The predetermined number can be set to zero or a larger integer. This predetermined number can be predefined or determined based on physical layer signaling and / or RRC signaling. In multi-subframe scheduling, consecutive subframes or subframes with a predetermined period can be scheduled. The number of subframes to be scheduled can be predefined or determined based on physical layer signaling and / or RRC signaling.

[0237] In cross-subframe scheduling, a DCI allocates resources within a subframe. Specifically, the PDCCH or EPDCCH in a given subframe schedules the PDSCH in a predetermined number of subframes following that subframe. Similarly, the PDCCH or EPDCCH in a given subframe schedules 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 predefined and determined based on physical layer signaling and / or RRC signaling. Cross-subframe scheduling can schedule consecutive subframes or subframes with a predetermined period.

[0238] In Semi-Persistent 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 and receives predetermined PDSCH and / or PUSCH based on the SPS-related settings. When a PDCCH or EPDCCH for releasing SPS is detected during SPS activation, terminal device 2 releases (deactivates) SPS and stops receiving predetermined PDSCH and / or PUSCH. SPS release can be performed based on predetermined conditions. For example, SPS is released when a predetermined number of empty transmission data are received. Empty data transmission for SPS release corresponds to a MAC Protocol Data Unit (PDU) including zero MAC Service Data Units (SDUs).

[0239] Information related to SPS via RRC signaling includes the SPS C-RNTI (which is the SPN RNTI), information related to the period (interval) of PDSCH scheduling, information related to the period (interval) of PUSCH scheduling, information related to the settings used to release the SPS, and / or the number of HARQ processes in the SPS. SPS is supported only in primary cells and / or primary secondary cells.

[0240] <1.8. Correction>

[0241] <HARQ in this embodiment>

[0242] In this embodiment, HARQ has various features. HARQ sends and retransmits transport blocks. In HARQ, a predetermined number of processes (HARQ processes) are used (set), and each process operates independently according to a stop and wait scheme.

[0243] In the downlink, HARQ is asynchronous and operates adaptively. In other words, in the downlink, retransmissions are always scheduled via the PDCCH. The uplink HARQ-ACK (response message) corresponding to the downlink transmission is sent via PUCCH or PUSCH. In the downlink, the PDCCH notifies the HARQ processing number indicating the HARQ handling and information indicating whether the transmission is an initial transmission or a retransmission.

[0244] In the uplink, HARQ operates synchronously or asynchronously. The 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 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 (retransmission) but instead stores the data in the HARQ buffer. In this case, the PDCCH can be sent to restart the retransmission. Furthermore, 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. Additionally, 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.

[0245] Furthermore, in the uplink, HARQ can be operated asynchronously only if predetermined conditions (settings) are met. In other words, downlink HARQ-ACK is not sent, and uplink retransmission can be scheduled continuously via PDCCH.

[0246] In a HARQ-ACK report, HARQ-ACK indicates ACK, NACK, or DTX. When HARQ-ACK is ACK, it indicates that the corresponding transport block (codeword and channel) was correctly received (decoded). When HARQ-ACK is NACK, it indicates that the corresponding transport block (codeword and channel) was not correctly received (decoded). When HARQ-ACK is DTX, it indicates that the corresponding transport block (codeword and channel) did not exist (was not transmitted).

[0247] 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 for each serving cell. Furthermore, 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.

[0248] In this embodiment, the HARQ information consists of at least a New Data Indicator (NDI) and a Transport Block Size (TBS). The NDI indicates whether the transport block corresponding to the HARQ information is being transmitted for the first time or is being retransmitted. The TBS is the size of the transport block. A transport block is a data block in the transport channel (transport layer) and can be the unit used to perform HARQ. In DL-SCH transmission, the HARQ information further includes a HARQ processing ID (HARQ processing number). In UL-SCH transmission, the HARQ information further includes information bits encoding the transport block and a Redundancy Version (RV), where RV specifies the parity bit. Regarding spatial multiplexing in DL-SCH, its HARQ information for each transport block includes a set of NDI and TBS.

[0249] <1.9. Resource Element Mapping>

[0250] <Details of LTE downlink resource element mapping in this embodiment>

[0251] Figure 10This diagram illustrates an example of LTE downlink resource element mapping in this embodiment. In this example, the set of resource elements in a resource block pair is described when the number of OFDM symbols in a resource block and a time slot is seven. 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). Furthermore, 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 of 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 assigned across the system bandwidth. For example, when the system bandwidth consists of six resource blocks, subcarriers assigned subcarrier numbers 0 to 71 are used. Furthermore, in the description of this embodiment, resource element (k, l) is a resource element indicated by subcarrier number k and OFDM symbol number l.

[0252] Resource elements R0 through R3 indicate cell-specific reference signals for antenna ports 0 through 3, respectively. Hereinafter, the cell-specific reference signals for antenna ports 0 through 3 are also referred to as cell-specific RS (CRS). This example describes the case where there are four antenna ports with CRS, but this number can be varied. For example, CRS can use one antenna port or two antenna ports. Furthermore, CRS can be shifted in the frequency direction based on the cell ID. For example, CRS can be shifted in the frequency direction based on the remainder obtained by dividing the cell ID by 6.

[0253] Resource elements C1 to C4 indicate reference signals (CSI-RS) used to measure the transmission path status of antenna ports 15 to 22. Resource elements C1 to C4 respectively indicate the CSI-RS for CDM groups 1 to CDM groups 4. The CSI-RS consists of orthogonal sequences (orthogonal codes) using Walsh codes and scrambling codes using pseudo-random sequences. Furthermore, the CSI-RS is code-division multiplexed within CDM groups using orthogonal codes (such as Walsh codes). Additionally, the CSI-RS is frequency-division multiplexed (FDM) between CDM groups.

[0254] 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.

[0255] Multiple antenna ports of the CSI-RS are specified. The CSI-RS can be configured as a reference signal corresponding to eight antenna ports (15 to 22). Additionally, the CSI-RS can be configured as a reference signal corresponding to four antenna ports (15 to 18). Furthermore, the CSI-RS can be configured as a reference signal corresponding to two antenna ports (15 to 16). Additionally, the CSI-RS can be configured as a reference signal corresponding to only one antenna port (15). The CSI-RS can be mapped to several subframes; for example, the CSI-RS can be mapped for every two or more subframes. Multiple mapping modes are specified for the resource elements of the CSI-RS. Furthermore, the base station device 1 can configure multiple CSI-RS in the terminal device 2.

[0256] CSI-RS can have its transmit power set to zero. A CSI-RS with zero transmit power is also known as a zero-power CSI-RS. Zero-power CSI-RS is independent of the CSI-RS settings at antenna ports 15 to 22. Furthermore, CSI-RS at antenna ports 15 to 22 are also referred to as non-zero-power CSI-RS.

[0257] Base station device 1 uses RRC signaling to configure CSI-RS as control information specific to terminal device 2. In terminal device 2, CSI-RS is configured by base station device 1 via RRC signaling. Furthermore, terminal device 2 can configure CSI-IM resources, which are resources used for measuring interference power. Terminal device 2 generates feedback information based on the settings from base station device 1, using CSI-RS, CSI-RS, and / or CSI-IM resources.

[0258] 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) utilizing Walsh codes and scrambling codes 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 performs CDM within the CDM group according to the orthogonal codes. The DL-DMRS perform 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 these orthogonal sequences are orthogonal to each other. The 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 use some or all of the four antenna ports (antenna ports 107 to 110). Furthermore, the DL-DMRS can change the CDM spreading code length or the number of resource elements to be mapped based on the number of ranks of the associated channel.

[0259] The DL-DMRS used for transmitting PDSCH via antenna ports 7, 8, 11, and 13 is mapped to the resource element indicated by D1. The DL-DMRS used for transmitting PDSCH via antenna ports 9, 10, 12, and 14 is mapped to the resource element indicated by D2. Furthermore, the DL-DMRS used for transmitting PDSCH via antenna ports 107 and 108 is mapped to the resource element indicated by D1. The DL-DMRS used for transmitting PDSCH via antenna ports 109 and 110 is mapped to the resource element indicated by D2.

[0260] <Details of the downlink resource element mapping for NR in this embodiment>

[0261] Figure 11 This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment. Figure 11 This example illustrates the set of resource elements in the predefined resources when parameter set 0 is used. Figure 11 The predetermined resources shown are resources formed by time length and frequency bandwidth (such as a resource block pair in LTE).

[0262] In NR, the predetermined resource is called an NR resource block (NR-RB). The predetermined resource can be used as a unit for the allocation of NR-PDSCH or NR-PDCCH, a unit in which the mapping of predetermined channels or predetermined signals to resource elements is defined, or a unit in which a set of parameters is set.

[0263] exist Figure 11 In the example, the predetermined resources include 14 OFDM symbols indicated by OFDM symbol numbers 0 to 13 in the time direction and 12 subcarriers indicated by subcarrier numbers 0 to 11 in the frequency direction. When the system bandwidth includes multiple predetermined resources, the subcarrier numbers are allocated across the entire system bandwidth.

[0264] Resource elements C1 through C4 indicate reference signals (CSI-RS) used to measure the transmission 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.

[0265] Figure 12 This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment. Figure 12 This example illustrates the set of resource elements in the predefined resources when parameter set 1 is used. Figure 12 The predetermined resources shown are resources formed by time length and frequency bandwidth (such as a resource block pair in LTE).

[0266] exist Figure 12 In this example, the predetermined resources include seven OFDM symbols indicated by OFDM symbol numbers 0 to 6 in the time direction and 24 subcarriers indicated by subcarrier numbers 0 to 23 in the frequency direction. When the system bandwidth includes multiple predetermined resources, the subcarrier numbers are allocated across the entire system bandwidth.

[0267] Resource elements C1 through C4 indicate reference signals (CSI-RS) used to measure the transmission 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.

[0268] Figure 13 This is a diagram illustrating an example of downlink resource element mapping for NR according to this embodiment. Figure 13 This example illustrates the set of resource elements in the predefined resources when parameter set 1 is used. Figure 13 The predetermined resources shown are resources formed by time length and frequency bandwidth (such as a resource block pair in LTE).

[0269] exist Figure 13In this example, the predetermined resources include 28 OFDM symbols indicated by OFDM symbol numbers 0 to 27 in the time direction and 6 subcarriers indicated by subcarrier numbers 0 to 6 in the frequency direction. When the system bandwidth includes multiple predetermined resources, the subcarrier numbers are allocated across the entire system bandwidth.

[0270] Resource elements C1 through C4 indicate reference signals (CSI-RS) used to measure the transmission 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.

[0271] <1.10. Self-contained transmission>

[0272] <Details of the self-contained transmission of NR in this embodiment>

[0273] In NR, physical channels and / or physical signals can be transmitted via self-contained transmission. Figure 14 An example of a frame configuration for self-contained transmission in this embodiment is illustrated. In self-contained transmission, a single transmission and reception includes sequential downlink transmissions, GP, and sequential downlink transmissions starting from the header. Sequential downlink transmissions include at least one downlink control message and DMRS. The downlink control message provides instructions to receive the downlink physical channel included in the sequential downlink transmissions and to transmit the uplink physical channel included in the sequential uplink transmissions. When the downlink control message provides instructions to receive the downlink physical channel, the terminal device 2 attempts to receive the downlink physical channel based on the downlink control message. Then, the terminal device 2 transmits the success or failure (decoding success or failure) of receiving the downlink physical channel via the uplink control channel included in the uplink transmissions assigned after the GP. On the other hand, when the downlink control message provides instructions to transmit the uplink physical channel, the uplink physical channel transmitted based on the downlink control message is included in the uplink transmission to be transmitted. In this way, by flexibly switching between uplink and downlink data transmission using downlink control information, countermeasures can be taken immediately to increase or decrease the uplink and downlink traffic ratio. Furthermore, by immediately notifying downlink reception success or failure via uplink transmission, low-latency downlink communication can be achieved.

[0274] A unit time slot is the smallest time unit used to define downlink transmission, GP, or uplink transmission. The unit time slot is reserved for one of downlink, GP, and uplink transmissions. Neither downlink nor uplink transmissions are included within the unit time slot. The unit time slot can be the minimum transmission time of the channel associated with the DMRS included in the unit time slot. A unit time slot is defined, for example, as a sampling interval (T). s (or an integer multiple of the symbol length of NR).

[0275] A unit frame time can be the minimum time specified by scheduling. A unit frame time can be the smallest unit in which a transmission block is transmitted. A unit timeslot time can be the maximum transmission time of the channel associated with the DMRS included in the unit timeslot time. A unit frame time can be the unit time in which the uplink transmission power in terminal device 2 is determined. A unit frame time can be referred to as a subframe. Within a unit frame time, there are three types: downlink-only transmission, uplink-only transmission, and a combination of uplink and downlink transmission. A unit frame time is defined, for example, as the sampling interval (T) of NR. s ( ), symbol length or unit time slot time is an integer multiple of the symbol length or unit time slot time.

[0276] Transmit / receive time is a single transmission / reception interval. This interval (gap) during which neither physical channel transmission nor physical signal transmission occurs can occupy the space between one transmission / reception session and another. Terminal device 2 may not be able to average CSI measurements between different transmissions / receptions. Transmit / receive time can also be referred to as TTI. A transmit / receive time is defined, for example, as the sampling interval (T0) of NR. s (), symbol length, unit slot time, or unit frame time are integer multiples of each other.

[0277] <1.11. Technical Features>

[0278] <NR-PUCCH configuration in this embodiment>

[0279] The configuration of NR-PUCCH will be described below in this embodiment.

[0280] First, an NR-PUCCH transmitted in narrowband will be described as an example of an NR-PUCCH configuration. Note that in the following description, this NR-PUCCH is also referred to as the "first NR-PUCCH". Specifically, the first NR-PUCCH is transmitted using all symbols in one resource block and multiple subframes. In this case, due to the narrow bandwidth, a reduction in transmit power (e.g., PAPR) can be expected.

[0281] Furthermore, an NR-PUCCH transmitted in a wider bandwidth than the first NR-PUCCH and for a shorter time than the first NR-PUCCH will be described as another example of an NR-PUCCH configuration. Note that in the following description, this NR-PUCCH is also referred to as the "second NR-PUCCH". As a specific example, the second NR-PUCCH can be transmitted using two symbols and seven resource blocks. Therefore, when the second PUCCH is used, the transmission can be completed in a shorter time than the first NR-PUCCH. Moreover, the second NR-PUCCH is preferably used to carry ACK / NACK for the NR-PDSCH in a self-contained transmission.

[0282] <Details of the first NR-PUCCH in this embodiment>

[0283] Next, the first NR-PUCCH will be described in detail below. Figure 15 This is an explanatory diagram illustrating an example of the configuration of the first NR-PUCCH. The first NR-PUCCH is transmitted using, for example, a resource block within a subframe. Furthermore, to achieve frequency diversity, half of the first NR-PUCCH on the time axis (e.g., seven symbols and one slot) can also be allocated to another resource block. Note that the first NR-PUCCH can be consecutively allocated to the same frequency resource within a subframe. For example, in… Figure 15 In the example shown, the first NR-PUCCH resource is ensured to be point-symmetric about its center with respect to the uplink predetermined bandwidth (e.g., the uplink bandwidth supported by the terminal device or the uplink system bandwidth of the base station device). Thus, the first NR-PUCCH can be allocated such that at least a portion of it is located differently in both the temporal and frequency directions within one subframe (that is, both the symbol and the resource block are different from each other). In other words, the first NR-PUCCH can be allocated such that at least a portion allocated for a certain time period within one subframe is assigned to a different resource block than another portion allocated for a different time period.

[0284] Note that in the base station device, resource blocks or resource elements not used as the first NR-PUCCH (except for...) Figure 15 Resources other than the shaded portion can be used to perform at least one of the following processes of the base station apparatus: another uplink transmission, another sublink transmission, another sublink reception, and another downlink reception.

[0285] Furthermore, in the terminal device, resource blocks or resource elements not used as the first NR-PUCCH (except for) Figure 15The resources (excluding the shaded portion) can be used to perform at least one of another uplink transmission, another secondary link transmission, another secondary link reception, and another downlink reception of the terminal device.

[0286] and, Figure 16 This is an explanatory diagram illustrating another example of the configuration of the first NR-PUCCH. (And...) Figure 15 The difference in the examples shown is that... Figure 16 The first NR-PUCCH shown is sent using a pair of resource blocks. In this configuration, with Figure 15 Compared to the example shown, frequency diversity is difficult to obtain. However, because the same frequency band is used over a longer period of time, it is more satisfactory in channel estimation correction in the time direction. That is, in Figure 16 In the examples shown, for instance, satisfactory characteristics can be obtained in environments where frequency diversity is not sufficiently obtained, such as when the uplink predetermined bandwidth is narrow.

[0287] <Details of the second NR-PUCCH in this embodiment>

[0288] Next, the second NR-PUCCH will be described. Figure 17 This is an explanatory diagram illustrating an example of the configuration of the second NR-PUCCH. Figure 17 In the example shown, the second NR-PUCCH is transmitted using, for example, four symbols and three resource blocks from the following subframe. Furthermore, to achieve frequency diversity, half of the second NR-PUCCH on the timeline (e.g., two symbols) can also be allocated to another resource block as in the first NR-PUCCH. Note that in Figure 17 In the example shown, the second NR-PUCCH resource is ensured to be point-symmetric about its center with respect to the uplink predetermined bandwidth (e.g., the uplink bandwidth supported by the terminal device or the uplink system bandwidth of the base station device). Thus, the second NR-PUCCH can be allocated such that at least a portion of it is located differently in the time and frequency directions within a subframe than another portion (that is, both the symbol and the resource block are different from each other). In other words, the second NR-PUCCH can be allocated such that at least a portion allocated to one resource block is allocated within a different time period within a subframe compared to another portion allocated to another resource block.

[0289] Note that in the terminal device, resource blocks or resource elements not used as the second NR-PUCCH (except for...) Figure 17The resources (excluding the shaded portion) can be used to perform at least one of another uplink transmission, another secondary link transmission, another secondary link reception, and another downlink reception of the terminal device.

[0290] Note that in the base station device, resource blocks or resource elements not used as the second NR-PUCCH (except for...) Figure 17 Resources other than the shaded portion can be used to perform at least one of the following processes of the base station apparatus: another uplink transmission, another sublink transmission, another sublink reception, and another downlink reception.

[0291] and, Figure 18 This is an explanatory diagram illustrating another example of the configuration of the second NR-PUCCH. Figure 17 The example shown is similar to Figure 18 The difference in the example shown is that the second NR-PUCCH is transmitted using seven resource blocks and two symbols, with a wider bandwidth. Therefore, in Figure 18 In the example shown, the time required to send and receive the second NR-PUCCH is shorter, thus enabling communication with lower latency.

[0292] <Logical-physical mapping of NR-UPCCH resources in this embodiment>

[0293] Next, the logical-physical mapping of NR-PUCCH resources will be described.

[0294] First, an example of the logical-physical mapping of the first NR-PUCCH resource will be described. For example, Figure 19 This is an explanatory diagram illustrating an example of the logical-physical mapping of the first NR-PUCCH resource. Figure 19 In the table, the number attached to each physical resource indicates the logical number (index) of the NR-PUCCH resource. When an index is indicated for a PUCCH resource, the index is mapped to... Figure 19 The physical resources shown. Furthermore, in Figure 19 In the example shown, the indices are first assigned sequentially from the beginning of the time sequence, and then sequentially assigned from the lowest frequency. In other words, in Figure 19 In the example shown, the indexes are assigned sequentially in the time direction, starting from the end of the frequency band in the frequency direction. Furthermore, as... Figure 15 As shown in the example, the index is assigned in a way that is point-symmetric about the center of the uplink predetermined bandwidth.

[0295] Next, an example of the logical-physical mapping of the second NR-PUCCH resource will be described. For example, Figure 20This is an explanatory diagram illustrating an example of the logical-physical mapping of the second NR-PUCCH resource. Specifically, Figure 20 Examples and explanations are provided with reference to Figure 17 An example of logical-physical mapping in the configuration of the second NR-PUCCH is described. Figure 20 In the table, the number attached to each physical resource indicates the logical number (index) of the NR-PUCCH resource. When an index is indicated for a PUCCH resource, the index is mapped to... Figure 20 The physical resources shown. Figure 20 The example shown is similar to Figure 19 The difference in the example shown is that the indices are first assigned sequentially in the frequency direction, and then sequentially assigned starting from the later part of the time direction. In other words, in Figure 20 In the example shown, during a predetermined time period such as a subframe, the index is preferentially assigned starting from the latter part in the temporal direction and sequentially in the frequency direction. Therefore, it is easy to assign the second NR-PUCCH to the latter part of the subframe (that is, the rear end in the temporal direction). In other words, in Figure 20 In the example shown, a wider region can be ensured on the front side in the time direction than the region to which the second NR-PUCCH is assigned. For example, downlink resources can be allocated more flexibly to the front-side region. Therefore, by implementing... Figure 20 The configuration shown, for example, can enable self-contained transmission with good resource efficiency.

[0296] and, Figure 21 This is an explanatory diagram illustrating another example of the logical-physical mapping of the second NR-PUCCH resource. Specifically, Figure 21 Examples and explanations are provided with reference to Figure 18 Another example of logical-physical mapping in the configuration of the second NR-PUCCH described. Figure 21 In the example shown, the second NR-PUCCH is aggregated on the back side of the subframe. Figure 20 The example shown is easier. Therefore, by implementing... Figure 21 The configuration shown, for example, can enable self-contained transmission with better resource efficiency.

[0297] Note that although NR-PUCCH resources in the time and frequency domains have been described in each of the examples above, the index of NR-PUCCH resources can also be assigned on the code axis when code multiplexing is possible.

[0298] <Allocation of NR-PUCCH resources in this embodiment>

[0299] Next, the allocation scheme for NR-PUCCH resources will be described.

[0300] As an example of NR-PUCCH resource allocation technology, the NR-PUCCH resource can be determined based on the NR-PDCCH to which the ACK / NACK response included in the NR-PUCCH is scheduled, according to the terminal device.

[0301] Furthermore, as another example of NR-PUCCH resource allocation technology based on NR-PDCCH, the index of NR-PUCCH resources can be notified to the terminal device using a predefined field in NR-DCI format included in NR-PDCCH.

[0302] Furthermore, as another example of NR-PUCCH resource allocation technology based on NR-PDCCH, a predetermined field in NR-DCI format included in the NR-PDCCH can be used to notify the terminal device of association information with the index of the NR-PUCCH resource or the resource block of the NR-PUCCH. The relationship between the index of the NR-PUCCH resource or the resource block of the NR-PUCCH and the bit information of the predetermined field can be set, for example, using an RRC message.

[0303] Furthermore, as another example of NR-PUCCH resource allocation technology based on NR-PDCCH, the terminal device can be notified of the resource block sent by NR-PUCCH using a predetermined field in the NR-DCI format included in NR-PDCCH. The information used to notify the resource block can have the same instruction format as, for example, resource blocks used for scheduling NR-PDSCH.

[0304] Furthermore, as another example of NR-PUCCH resource allocation techniques based on NR-PDCCH, the NR-PUCCH resource can be determined in association with the NR-CCE to which the NR-PDCCH is mapped. As a specific example, the index of the header of the NR-CCE included in the NR-PDCCH is associated with the index of the NR-PUCCH resource. More specifically, the index of the NR-PUCCH resource is determined based on the NR-CCE index and a predetermined offset. The predetermined offset is determined based on dedicated RRC information or information from the NR-DCI included in the NR-PDCCH.

[0305] Furthermore, as another example of an NR-PUCCH resource allocation scheme, NR-PUCCH resources can be determined in association with resource blocks that use NR-PDSCH corresponding to the ACK / NACK of the NR-PUCCH. As a specific example, the minimum resource block index in the resource block using NR-PDSCH is associated with the index of the NR-PUCCH resource. More specifically, the index of the NR-PUCCH resource can be determined based on the minimum resource block index and a predetermined offset. Moreover, the predetermined offset can be determined based on dedicated RRC information or NR-DCI information included in the NR-PDCCH.

[0306] <Non-NR-PUCCH multiplexing in this embodiment>

[0307] The first NR-PUCCH and the second NR-PUCCH can be multiplexed in the same NR carrier (NR cell). Therefore, communications with different request conditions can be accommodated in one carrier, and the system can be operated with better efficiency.

[0308] For example, the first NR-PUCCH and the second NR-PUCCH can be multiplexed on the timeline. As a specific example, the first NR-PUCCH and the second NR-PUCCH can be multiplexed in different subframes. For example, Figure 22 This is an explanatory diagram illustrating an example of time-domain multiplexing of the first NR-PUCCH and the second NR-PDCCH. Figure 22 In the example shown, the second NR-PUCCH is transmitted in an earlier NR uplink subframe, and the first NR-PUCCH is transmitted in a later NR uplink subframe.

[0309] Furthermore, the first NR-PUCCH and the second NR-PUCCH can be multiplexed along the frequency axis. As a specific example, the first NR-PUCCH and the second NR-PUCCH can be multiplexed in different resource blocks. For example, Figure 23 This is an explanatory diagram illustrating an example of frequency domain multiplexing of the first NR-PUCCH and the second NR-PUCCH. Figure 23 In the example shown, the first NR-PUCCH is transmitted at the end of the uplink predetermined bandwidth, and the second NR-PUCCH is transmitted at the center of the uplink predetermined bandwidth.

[0310] Note that the first NR-PUCCH and the second NR-PUCCH can be multiplexed on the spatial axis. Furthermore, the first NR-PUCCH and the second NR-PUCCH can be multiplexed on the code axis.

[0311] <Switching of NR-PUCCH in this embodiment>

[0312] Next, the details of the switching between the two types of NR-PUCCH in this embodiment (that is, the switching between the first NR-PUCCH and the second NR-PUCCH) will be described below.

[0313] The terminal device can switch between transmitting the first NR-PUCCH and the second NR-PUCCH based on predetermined conditions. For example, the configuration of the NR-PUCCH to be transmitted (in other words, the configuration of the NR-PUCCH requested by the usage scenario) may differ between a low-power requirement and a low-latency requirement. Therefore, flexible communication can be achieved based on different request conditions.

[0314] As an example of NR-PUCCH handover methods, the terminal device can switch between multiple types of NR-PUCCH to be transmitted based on NR-PDCCH (that is, it can switch between the first NR-PUCCH and the second NR-PUCCH).

[0315] As an example of NR-PDCCH-based handover conditions, the terminal device can switch the NR-PUCCH type based on the timing indicated by the transmission of the NR-PUCCH. For example, as Figure 22 As shown in the example, if the terminal device is instructed to send NR-PUCCH in an earlier NR uplink subframe, it can send a second NR-PUCCH, and if the terminal device is instructed to send NR-PUCCH in a later NR uplink subframe, it can send a first NR-PUCCH.

[0316] Note that the information used to indicate the transmission timing of the NR-PUCCH can, for example, be information indicating self-contained transmission. As a specific example, if self-contained transmission is not indicated, the terminal device can use a first NR-PUCCH to perform transmission over a predetermined subframe (e.g., a subframe four subframes later than the subframe in which the NR-PDCCH was received). Conversely, if self-contained transmission is indicated, the terminal device can use a second NR-PUCCH to perform transmission over the same subframe as the channel indicated by the NR-PDCCH.

[0317] Furthermore, the information used to indicate the transmission timing of the NR-PUCCH can be, for example, offset information indicating the NR uplink subframe from which the NR-PUCCH is transmitted. As a specific example, the offset information can be offset from the end timing of the received NR-PDCCH or the end timing of the channel scheduled by the NR-PDCCH. As another example, the offset information can be offset from the start timing of the received NR-PDCCH or the start timing of the channel scheduled by the NR-PDCCH. Moreover, if the offset information is equal to or less than a predetermined value, the terminal device can transmit a first NR-PUCCH. Conversely, if the offset information is equal to or greater than the predetermined value, the terminal device can transmit a second NR-PUCCH. Note that the timing and offset information are preferably, for example, one of the NR subframe, time slot, and symbol.

[0318] Furthermore, the information used to indicate the transmission timing of the NR-PUCCH can be, for example, information regarding the timing number of the NR uplink subframe from which the NR-PUCCH is transmitted. The timing number is preferably one of the System Frame Number (SFN), subframe number, slot number, and symbol number. Here, depending on the processing capability of the terminal device, if transmission of the NR-PUCCH is difficult at the timing indicated by the information, such as when preparation for transmission is not yet complete or in a similar situation, the NR-PUCCH can be transmitted at a later timing. Moreover, if transmission can be performed at the timing indicated by the notification information, the terminal device can transmit a second NR-PUCCH at that timing. Conversely, if transmission is difficult to perform at the timing indicated by the notification information, the terminal device can transmit a first NR-PUCCH at a later timing.

[0319] Furthermore, the information used to indicate the transmission timing of the NR-PUCCH can be, for example, information about the channel length of the NR-PDSCH or NR-PUSCH included in the NR-PUCCH via NR-DCI scheduling. Specifically, the information about the channel length of the NR-PDSCH or NR-PUSCH can be information indicating the end of the channel for the NR-PDSCH or NR-PUSCH. Note that if the notified information indicates an end later than the predetermined end time, the terminal device may transmit the first NR-PUCCH. Conversely, if the notified information indicates an end earlier than the predetermined end time, the terminal device may transmit the second NR-PUCCH. The first NR-PUCCH transmitted when the notified information indicates an end later than the predetermined end time is preferably transmitted in a subframe later than the subframe in which the NR-PDSCH or NR-PUSCH was transmitted. Moreover, the second NR-PUCCH transmitted when the notified information indicates an end earlier than the predetermined end time is preferably transmitted in the same subframe as the subframe in which the NR-PDSCH or NR-PUSCH was transmitted. Note that the information regarding the predetermined end timing is preferably information about symbol units, and may be information about time slot units.

[0320] Furthermore, as an example of NR-PDCCH-based handover conditions, the terminal device can perform a handover based on information indicating the type of NR-PUCCH to be switched. Specifically, the information indicating the type of NR-PUCCH to be switched can be information based on the bit format indicating the transmission of the first NR-PUCCH or the second NR-PUCCH. Note that when the bit indication is 1, the terminal device can transmit the first NR-PUCCH. When the bit indication is 0, the terminal device can transmit the second NR-PUCCH.

[0321] Furthermore, as an example of an NR-PUCCH switching method, the terminal device can switch the type of NR-PUCCH to be sent based on RRC messages.

[0322] The RRC message may include, for example, setting parameters for indicating self-contained transmission. In this case, if self-contained transmission is not indicated according to the parameters, the terminal device may use a first NR-PUCCH to transmit a predetermined subframe (e.g., a subframe four subframes later than the subframe through which it receives the NR-PDCCH). Conversely, if self-contained transmission is indicated according to the parameters, the terminal device may use a second NR-PUCCH to transmit the same subframe as the channel indicated by the NR-PDCCH.

[0323] Furthermore, the RRC message may include, for example, setting parameters for the NR-PUCCH. In this case, if the first NR-PUCCH is set according to the setting parameters, the terminal device can send the first NR-PUCCH. And, if the second NR-PUCCH is set according to the setting parameters, the terminal device can send the second NR-PUCCH. Note that if both the first and second NR-PUCCH settings are performed according to the setting parameters, the second NR-PUCCH is preferably sent.

[0324] Note that the terminal device can send the first NR-PUCCH when the terminal device is in a state where the RRC connection has not been established (RRC idle state).

[0325] RRC messages used to indicate handover in the base station device can be sent to the terminal device based on the terminal device's capabilities. Therefore, the terminal device can send capability-indicating information to the base station device. Examples of capability-indicating information include parameters indicating the terminal category for which high-functionality processing capabilities are recommended, parameters indicating whether self-contained transmission is implemented, parameters indicating whether a second NR-PUCCH is sent, and parameters indicating the NR-PUCCH generation processing time.

[0326] Furthermore, as another example of a means of switching NR-PUCCH, the type of NR-PUCCH can be switched when predetermined conditions are met in the terminal device.

[0327] As an example of the predetermined conditions, a condition indicating whether the type of information (UCI) transmitted via NR-PUCCH is a predetermined type can be used as an example. Specifically, when the information transmitted via NR-PUCCH is a CSI, the terminal device can use the first NR-PUCCH to transmit the information. On the other hand, when the information transmitted via NR-PUCCH is only an ACK / NACK of NR-PDSCH, the terminal device can use the second NR-PUCCH to transmit the information. In other words, when the information transmitted via NR-PUCCH includes a CSI, the terminal device uses the first NR-PUCCH to transmit the information. When the information does not include a CSI, the terminal device can use the second NR-PUCCH to transmit the information.

[0328] Note that the base station device can obtain new information based on whether either the first NR-PUCCH or the second NR-PUCCH is received. For example, if the first NR-PUCCH is received, the base station device can identify that the corresponding terminal device has sent a scheduling request (SR). Conversely, if the second NR-PUCCH is received, the base station device can identify that the corresponding terminal device has not sent a scheduling request (SR). Moreover, if uplink data that is expected to be transmitted is generated, the terminal device can send the first NR-PUCCH. In other words, the terminal device can send the second NR-PUCCH.

[0329] Furthermore, as another example of the predetermined condition, a condition indicating whether the number of ACK / NACK bits transmitted with an NR-PUCCH is equal to or greater than a predetermined value can be used as an example. Specifically, if the number of ACK / NACK bits is equal to or greater than the predetermined value, the terminal device may transmit a first NR-PUCCH. Conversely, if the number of ACK / NACK bits is equal to or less than the predetermined value, the terminal device may transmit a second NR-PUCCH. Note that instead of the number of ACK / NACK bits, the number of subframes using which to transmit the NR-PDSCH corresponding to the ACK / NACK, or the number of serving cells set according to carrier aggregation, can be used as the predetermined condition.

[0330] Furthermore, as another example of the predetermined conditions, a condition indicating whether the bandwidth (frequency band) used to transmit the NR-PUCCH is a predetermined bandwidth can be cited as an example. Specifically, if the bandwidth (frequency band) used to transmit the NR-PUCCH is not, for example, a license-free band of 5 GHz, the terminal device can transmit the first NR-PUCCH. Conversely, if the bandwidth (frequency band) used to transmit the NR-PUCCH is a non-licens-free band, the terminal device can transmit the second NR-PUCCH.

[0331] Furthermore, as another example of the predetermined conditions, a condition indicating whether the NR-PUCCH to be transmitted conforms to predetermined physical parameters can be used as an example. Specifically, when the instruction to transmit the NR-PUCCH is given using the predetermined physical parameters, the terminal device can transmit a first NR-PUCCH. Conversely, when the instruction to transmit the NR-PUCCH is given using physical parameters different from the predetermined physical parameters, the terminal device can transmit a second NR-PUCCH.

[0332] Furthermore, as another example of the predetermined conditions, a condition based on the result obtained by comparing the transmission power of the NR-PUCCH with a predetermined value can be cited as an example. Specifically, if the transmission power of the second NR-PUCCH is calculated and the calculated transmission power is equal to or greater than the predetermined value, the terminal device may transmit the first NR-PUCCH. Conversely, if the calculated transmission power is less than the predetermined value, the terminal device may transmit the second NR-PUCCH.

[0333] Furthermore, as another example of the predetermined conditions, a condition indicating whether the bandwidth (bandwidth) of the NR-PDSCH used to transmit the ACK / NACK corresponding to the ACK carried by the NR-PUCCH is a predetermined bandwidth can be cited as an example.

[0334] Furthermore, as another example of the predetermined conditions, a condition indicating whether an instruction to transmit an NR-PUCCH according to the waveform of a predetermined carrier is given can serve as an example. Specifically, in the case of uplink transmission using SC-FDMA (e.g., DFT-S-OFDM), the terminal device can use the first NR-PUCCH to perform transmission. Conversely, in the case of uplink transmission using OFDM, the terminal device can use the second NR-PUCCH to perform transmission.

[0335] Furthermore, as another example of the predetermined conditions, indicating whether the type of RAT set according to dual connectivity is a condition of the predetermined RAT can be used as an example. As a specific example, when dual connectivity with LTE is set, the terminal device can send a first NR-PUCCH. Conversely, when dual connectivity with NR is set only, the terminal device can send a second NR-PUCCH.

[0336] Note that the above-described NR-PUCCH switching focuses on the switching between the first NR-PUCCH and the second NR-PUCCH; however, the aforementioned conditions can be applied to switching parameters in either the first or second NR-PUCCH. For example, switching the number of resource blocks used in the first NR-PUCCH can be considered as a parameter switching in the first NR-PUCCH. Similarly, switching the number of symbols used in the second NR-PUCCH can also be considered as a parameter switching in the second NR-PUCCH.

[0337] Furthermore, by replacing the aforementioned NR-PUCCH with a secondary link ACK / NACK channel that carries the ACK / NACK response corresponding to the NR-PSSCH in the secondary link, similar beneficial effects to those in uplink communication can be expected in secondary link communication.

[0338] Note that the configuration and mapping methods for the first and second NR-PUCCHs described above are not limited to NR, and similar configurations and methods can be applied even in LTE or other RATs.

[0339] Moreover, the switching of the aforementioned NR-PUCCH and the NR-PUCCH is not limited to NR, and similar methods can be applied even in LTE or other RATs.

[0340] <<2. Application Examples>>

[0341] The technology disclosed herein can be applied to various products. For example, base station device 1 can be implemented as any type of evolved Node B (eNB), such as a macro eNB or a small eNB. A small eNB can be an eNB covering a cell smaller than a macro cell, such as a pico eNB, micro eNB, or femtocell eNB. Alternatively, base station device 1 can be implemented as another type of base station, such as a NodeB or a base transceiver station (BTS). Base station device 1 may include a main entity (also referred to as a base station device) controlling wireless communication and one or more remote radio heads (RRHs) located at a different location from that entity. Furthermore, various types of terminals described below can operate as base station device 1 by temporarily or permanently performing base station functions. Moreover, at least some of the components of base station device 1 can be implemented in a base station device or a module for a base station device.

[0342] Furthermore, terminal device 2 can be implemented as a mobile terminal, such as a smartphone, tablet PC, laptop PC, portable gaming terminal, portable / radar detector mobile router, digital camera, or in-vehicle terminal (e.g., car navigation device). Additionally, terminal device 2 can be implemented as a terminal performing machine-to-machine (M2M) communication (also known as a machine-to-computer (MTC) terminal). Moreover, at least some of the components of terminal device 2 can be implemented in a module mounted on the terminal (e.g., an integrated circuit module configured on a die).

[0343] <2.1. Examples of Base Station Applications>

[0344] (First application example)

[0345] Figure 24 This is a block diagram illustrating a first example of a schematic configuration of an eNB that can be applied according to the technology of this disclosure. 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.

[0346] Each antenna 810 includes one or more antenna elements (e.g., multiple antenna elements constituting a MIMO antenna) and is used to enable the base station device 820 to transmit and receive wireless signals. The eNB 800 may include, for example... Figure 24 The plurality of antennas 810 shown may, for example, correspond to multiple frequency bands used by the eNB 800. It should be noted that, although Figure 24 The illustration shows an example of an eNB 800 including multiple antennas 810, but an eNB 800 may include a single antenna 810.

[0347] The base station equipment 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.

[0348] The controller 821 can 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 for transmission. Furthermore, the controller 821 may also have control logic functions such as performing radio resource control, radio bearer control, mobility management, admission control, and scheduling. Additionally, it can cooperate with surrounding eNBs or core network nodes to perform control. 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).

[0349] Network interface 823 is a communication interface used to connect base station equipment 820 to core network 824. Controller 821 can communicate with the core network node or another eNB via network interface 823. In this case, eNB 800 can connect to the core network node or another eNB via a logical interface (e.g., an S1 interface or an X2 interface). Network interface 823 can be a wireless communication interface for wireless backhaul or a wired communication interface. When network interface 823 is a wireless communication interface, it can use a frequency band higher than that used by wireless communication interface 825 for wireless communication.

[0350] The wireless communication interface 825 supports cellular communication systems, such as LTE or LTE-Advanced, and provides wireless connectivity to terminals located within the cell of the eNB 800 via antenna 810. The wireless communication interface 825 typically includes a baseband (BB) processor 826, RF circuitry 827, etc. The BB processor 826 can perform, for example, encoding / decoding, modulation / demodulation, multiplexing / demultiplexing, and various signal processing operations at each layer (e.g., L1, Media Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP)). Instead of the controller 821, the BB processor 826 may have some or all of the logical functions described above. The BB processor 826 can be a module including a memory storing a communication control program, a processor executing the program, and related circuitry; the functionality of the BB processor 826 can be changed by updating the program. Furthermore, the module can be a card or blade to be inserted into a slot in the base station device 820, or a chip mounted on the card or blade. Meanwhile, the RF circuit 827 may include a mixer, filter, amplifier, etc., and transmits and receives wireless signals via the antenna 810.

[0351] The wireless communication interface 825 may include, for example: Figure 24 The plurality of BB processors 826 shown may, for example, correspond to multiple frequency bands used by the eNB 800. Furthermore, the wireless communication interface 825 may also include, for example,... Figure 24 The plurality of RF circuits 827 shown may, for example, correspond to a plurality of antenna elements. Note that... Figure 24 The illustration shows an example of a wireless communication interface 825 including multiple BB processors 826 and multiple RF circuits 827, but the wireless communication interface 825 may include a single BB processor 826 or a single RF circuit 827.

[0352] exist Figure 24 In the eNB 800 shown, refer to Figure 8One or more components of the described high-level processing unit 101 and control unit 103 can be implemented in the wireless communication interface 825. Alternatively, at least some of these components can be implemented in the controller 821. As an example, a module including part or all of the wireless communication interface 825 and / or the controller 821 (e.g., the BB processor 826) can be implemented on the eNB 800. One or more components in the module can be implemented in the module. In this case, the module can store and execute a program that causes the processor to act as one or more components (in other words, a program that causes the processor to perform the operation of one or more components). As another example, a program that causes the processor to act as one or more components can be installed in the eNB 800, and the wireless communication interface 825 (e.g., the BB processor 826) and / or the controller 821 can execute the program. Thus, the eNB 800, the base station device 820, or the module can be provided as a device including one or more components, and a program that causes the processor to act as one or more components can be provided. Additionally, a readable recording medium on which the program is recorded can be provided.

[0353] In addition, Figure 24 In the eNB 800 shown, refer to Figure 8 The described receiving unit 105 and transmitting unit 107 can be implemented in the wireless communication interface 825 (e.g., RF circuit 827). Furthermore, the transceiver antenna 109 can be implemented in the antenna 810. Additionally, the network communication unit 130 can be implemented in the controller 821 and / or the network interface 823.

[0354] (Second application example)

[0355] Figure 25 This is a block diagram illustrating a second example of a schematic configuration of an eNB that can be applied according to the technology of this disclosure. The eNB 830 includes one or more antennas 840, a base station device 850, and an RRH 860. Each of the antennas 840 and RRH 860 can be connected to each other via an RF cable. Furthermore, the base station device 850 and RRH 860 can be connected to each other via a high-speed line (such as a fiber optic cable).

[0356] Each antenna 840 includes one or more antenna elements (e.g., antenna elements constituting a MIMO antenna) and is used to enable the RRH 860 to transmit and receive wireless signals. The eNB 830 may include, for example, Figure 25 The plurality of antennas 840 shown may, for example, correspond to multiple frequency bands used by the eNB 830. Note that... Figure 25The example illustrates an eNB 830 including multiple antennas 840, but an eNB 830 may include a single antenna 840.

[0357] 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 24 The controller 821, memory 822, and network interface 823 are described.

[0358] The wireless communication interface 855 supports cellular communication systems such as LTE and LTE-Advanced, and provides wireless connectivity with terminals located in the sector corresponding to RRH 860 via RRH 860 and antenna 840. The wireless communication interface 855 may typically include a BB processor 856, etc. The BB processor 856 is similar to the reference... Figure 24 The described BB processor 826, except that the BB processor 856 is connected to the RF circuitry 864 of the RRH 860 via a connection interface 857, includes a wireless communication interface 855 that may include, for example... Figure 24 The multiple BB processors 856 shown may, for example, correspond to multiple frequency bands used by the eNB 830. Note that... Figure 25 The illustration shows an example of a wireless communication interface 855 including multiple BB processors 856, but the wireless communication interface 855 may include a single BB processor 856.

[0359] 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.

[0360] In addition, the RRH 860 includes a connectivity interface 861 and a wireless communication interface 863.

[0361] 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.

[0362] The wireless communication interface 863 transmits and receives wireless signals via antenna 840. The wireless communication interface 863 typically includes 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, for example... Figure 25The multiple RF circuits 864 shown may, for example, correspond to multiple antenna elements. Note that... Figure 25 The illustration shows an example of a wireless communication interface 863 including multiple RF circuits 864, but the wireless communication interface 863 may include a single RF circuit 864.

[0363] exist Figure 25 In the eNB 830 shown, refer to Figure 8 One or more components of the described high-level processing unit 101 and control unit 103 may be implemented in wireless communication interface 855 and / or wireless communication interface 863. Alternatively, at least some of these components may be implemented in controller 851. As an example, a module including part or all of wireless communication interface 855 and / or controller 851 (e.g., BB processor 856) may be implemented on eNB 830. The one or more components may be implemented in the module. In this case, the module may store and execute a program that causes the processor to function as one or more components (in other words, a program that causes the processor to perform the operation of one or more components). As another example, a program that causes the processor to function as one or more components may be installed in eNB 830, and wireless communication interface 855 (e.g., BB processor 856) and / or controller 851 may execute the program. Thus, eNB 830, base station device 850, or module may be provided as a device including one or more components, and a program that causes the processor to function as one or more components may be provided. Additionally, a readable recording medium on which the program is recorded may be provided.

[0364] In addition, Figure 25 In the eNB 830 shown, for example, refer to Figure 8 The described receiving unit 105 and transmitting unit 107 can be implemented in the wireless communication interface 863 (e.g., RF circuit 864). Furthermore, the transceiver antenna 109 can be implemented in the antenna 840. Additionally, the network communication unit 130 can be implemented in the controller 851 and / or the network interface 853.

[0365] <2.2. Application Examples for Terminal Devices>

[0366] (First application example)

[0367] Figure 26This is a block diagram illustrating an example of a schematic configuration of a smartphone 900 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.

[0368] The 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 the smartphone 900. The memory 902 includes RAM and ROM, and stores programs and data executed by the processor 910. The storage 903 may include storage media such as semiconductor memory and hard disks. The external connectivity interface 904 is an interface for connecting the smartphone 900 to externally attached devices, such as memory cards and Universal Serial Bus (USB) devices.

[0369] Camera 906 includes, for example, an image sensor, such as a charge-coupled device (CCD) and a complementary metal-oxide-semiconductor (CMOS), and produces captured images. Sensor 907 may include a sensor array, including, for example, 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 information or operations 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.

[0370] The wireless communication interface 912 supports cellular communication systems, such as LTE or LTE-Advanced, and performs wireless communication. The wireless communication interface 912 typically includes a BB processor 913, RF circuitry 914, etc. The BB processor 913 can perform, for example, 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 can include mixers, filters, amplifiers, etc., and transmits and receives wireless signals via antenna 916. The wireless communication interface 912 can be a single-chip module in which the BB processor 913 and RF circuitry 914 are integrated. The wireless communication interface 912 can be as follows: Figure 26 As shown, it includes multiple BB processors 913 and multiple RF circuits 914. Note that... Figure 26The illustration shows 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.

[0371] 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.

[0372] 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.

[0373] Each antenna 916 includes one or more antenna elements (e.g., multiple antenna elements constituting a MIMO antenna) and is used for transmitting and receiving wireless signals via the wireless communication interface 912. The smartphone 900 may include, for example... Figure 26 The multiple antennas 916 are shown. Note that... Figure 26 The illustration shows an example of a smartphone 900 including multiple antennas 916, but a smartphone 900 may include a single antenna 916.

[0374] Furthermore, 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 configuration of the smartphone 900.

[0375] Bus 917 connects processor 901, memory 902, storage 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 is connected via... Figure 26 The feed lines, partially illustrated by dashed lines, supply power to each block of the smartphone 900 shown in the figure. The auxiliary controller 919 operates, for example, the minimum necessary functions of the smartphone 900 in sleep mode.

[0376] exist Figure 26 In the smartphone 900 shown, refer to Figure 9One or more components of the described high-level processing unit 201 and control unit 203 can be implemented in the wireless communication interface 912. Alternatively, at least some of these components can be implemented in the processor 901 or the auxiliary controller 919. As an example, a module including part or all of the wireless communication interface 912, the processor 901, and / or the auxiliary controller 919 (e.g., the BB processor 913) can be implemented on the smartphone 900. The one or more components can be implemented in the module. In this case, the module can store and execute a program that causes the processor to function as one or more components (in other words, a program that causes the processor to perform the operation of one or more components). As another example, a program that causes the processor to function as one or more components can be installed in the smartphone 900, and the wireless communication interface 912 (e.g., the BB processor 913), the processor 901, and / or the auxiliary controller 919 can execute the program. Thus, the smartphone 900 or the module can be provided as a device including the one or more components, and a program that causes the processor to function as one or more components can be provided. Additionally, a readable recording medium on which the program is recorded can be provided.

[0377] In addition, Figure 26 In the smartphone 900 shown, for example, refer to Figure 9 The described receiving unit 205 and transmitting unit 207 can be implemented in the wireless communication interface 912 (e.g., RF circuit 914). Furthermore, the transceiver antenna 209 can be implemented in the antenna 916.

[0378] (Second application example)

[0379] Figure 27 This is a block diagram illustrating an example of a schematic configuration of a car navigation device 920 to which the technology according to this disclosure can be applied. The car 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.

[0380] The processor 921 may be, for example, a CPU or a SoC, and controls the navigation function and other functions of the car navigation device 920. The memory 922 includes RAM and ROM, and stores the programs and data executed by the processor 921.

[0381] GPS module 924 uses GPS signals received from GPS satellites to measure the location (e.g., latitude, longitude, and altitude) of car navigation device 920. Sensor 925 may include a sensor array, including, for example, a gyroscope sensor, a geomagnetic sensor, a barometric pressure sensor, etc. Data interface 926 connects to in-vehicle network 941, for example via a terminal not shown, and acquires data generated on the vehicle side, such as vehicle speed data.

[0382] 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 if the screen of display device 930 is touched, and accepts information or operations input from the user. Display device 930 includes a screen, such as an LCD or OLED display, and displays the reproduced content or images of navigation functions. Speaker 931 outputs sound from the reproduced content or navigation functions.

[0383] The wireless communication interface 933 supports cellular communication systems, such as LTE or LTE-Advanced, and performs wireless communication. The wireless communication interface 933 typically includes a BB processor 934, RF circuitry 935, etc. The BB processor 934 can perform, for example, 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 can be a single-chip module in which the BB processor 934 and RF circuitry 935 are integrated. The wireless communication interface 933 may include, for example... Figure 27 The diagram shows multiple BB processors 934 and multiple RF circuits 935. Note that... Figure 27 The illustration shows 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.

[0384] 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.

[0385] 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.

[0386] Each antenna 937 includes one or more antenna elements (e.g., multiple antenna elements constituting a MIMO antenna) and is used for transmitting and receiving wireless signals via the wireless communication interface 933. The car navigation device 920 may include, for example... Figure 27 The multiple antennas 937 are shown. Note that... Figure 27 The illustration shows an example of a car navigation device 920 including multiple antennas 937, but the car navigation device 920 may include a single antenna 937.

[0387] Furthermore, 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 configuration of the car navigation device 920.

[0388] Battery 938 via Figure 27 The feed lines, partially illustrated by dashed lines, supply power to each block of the car navigation device 920 shown in the figure. Additionally, the battery 938 accumulates the power supplied from the vehicle.

[0389] exist Figure 27 In the car navigation device 920 shown, refer to Figure 9 One or more components of the described high-level processing unit 201 and control unit 203 can be implemented in the wireless communication interface 933. Alternatively, at least some of these components can be implemented in the processor 921. As an example, a module including part or all of the wireless communication interface 933 and / or the processor 921 (e.g., the BB processor 934) can be implemented in the car navigation device 920. The one or more components can be implemented in the module. In this case, the module can store and execute a program that causes the processor to function as one or more components (in other words, a program that causes the processor to perform the operation of one or more components). As another example, a program that causes the processor to function as one or more components can be installed in the car navigation device 920, and the wireless communication interface 933 (e.g., the BB processor 934) and / or the processor 921 can execute the program. Thus, the car navigation device 920 or the module can be provided as an apparatus including the one or more components, and a program that causes the processor to function as one or more components can be provided. Additionally, a readable recording medium on which the program is recorded can be provided.

[0390] In addition, Figure 27 In the car navigation device 920 shown, for example, referring to Figure 9 The described receiving unit 205 and transmitting unit 207 can be implemented in the wireless communication interface 933 (e.g., RF circuit 935). Furthermore, the transceiver antenna 209 can be implemented in the antenna 937.

[0391] The technology disclosed herein can also be implemented as an in-vehicle system (or vehicle) 940 comprising one or more blocks of a car navigation device 920, an in-vehicle network 941, and a vehicle module 942. That is, the in-vehicle system (or vehicle) 940 can be provided as an apparatus including at least one of a high-level processing unit 201, a control unit 203, a receiving unit 205, or a transmitting unit 207. 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.

[0392] <<3. Conclusion>>

[0393] As described above, in the system according to this embodiment, the communication device (terminal device) selectively switches between a first physical channel and a second physical channel, in which the number of symbols and the number of resource blocks are different from each other, and the first physical channel and the second physical channel are assigned to transmit control information to the base station during a predetermined time period (e.g., a subframe) in the time direction.

[0394] In this configuration, for example, the configuration of multiple uplink control channels designed according to usage can be multiplexed in a preferred and suitable mode. Moreover, the overall transmission efficiency of the system can be further improved.

[0395] Furthermore, the communication device according to this embodiment can multiplex the first physical channel and the second physical channel in both the time and frequency directions. In this configuration, communication under different request conditions can be accommodated on a single carrier in the system according to this embodiment. Therefore, the transmission efficiency of the entire system can be further improved.

[0396] Preferred embodiments of this disclosure have been described above with reference to the accompanying drawings; however, this disclosure is not limited to the examples described above. Those skilled in the art will discover various changes and modifications within the scope of the appended claims, and it should be understood that they naturally fall within the technical scope of this disclosure.

[0397] Furthermore, the effects described in this specification are merely illustrative or exemplary, and not restrictive. That is, other effects that will be clear to those skilled in the art from the description herein can be achieved, in conjunction with or in lieu of the effects described above, according to the technology disclosed herein.

[0398] Alternatively, this technology can also be configured as follows. (1)

[0400] A communication device, comprising:

[0401] A communication unit configured to perform wireless communication; and

[0402] A control unit is configured to selectively switch between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks are different in the first physical channel and the second physical channel, and the first physical channel and the second physical channel are assigned to transmit control information to a base station during a predetermined time period in a time series. (2)

[0404] According to the communication device described in (1), the control unit switches between a first physical channel and a second physical channel based on a timing indicated from the base station. (3)

[0406] According to the communication device described in (2), when a timing for self-contained transmission is indicated from the base station, the control unit switches to the physical channel with fewer symbols between the first physical channel and the second physical channel based on the timing. (4)

[0408] The communication device according to (2) or (3) includes:

[0409] A notification unit, configured to notify the base station of information about capabilities,

[0410] After the information regarding the capabilities is notified, the control unit receives from the base station instructions related to the timing of switching between the first physical channel and the second physical channel. (5)

[0412] The communication apparatus according to any one of (1) to (4) wherein the control unit switches between a first physical channel and a second physical channel according to the type of data to be sent to the base station. (6)

[0414] According to any one of (1) to (5) of the communication apparatus, wherein the control unit switches between a first physical channel and a second physical channel according to the frequency band used to transmit the control information. (7)

[0416] According to any one of (1) to (6) of the communication apparatus, wherein the control unit switches the first physical channel and the second physical channel based on a calculated value of the transmission power used to transmit the control information. (8)

[0418] The communication apparatus according to any one of (1) to (7) wherein the control unit switches the first physical channel and the second physical channel according to the communication method applied to communicating with the base station. (9)

[0420] The communication apparatus according to any one of (1) to (8) wherein the control unit switches the first physical channel and the second physical channel according to the type of wireless access technology configured through dual connectivity. (10)

[0422] The communication apparatus according to any one of (1) to (9) wherein the control unit multiplexes the first physical channel and the second physical channel in the time direction or the frequency direction during a time period including one or more of the predetermined time periods. (11)

[0424] According to the communication device of (10), the control unit multiplexes the first physical channel and the second physical channel in the time direction by assigning the first physical channel in the time direction during a second time period after the first time period in which the second physical channel is assigned in two or more consecutive predetermined time periods. (12)

[0426] According to the communication device described in (10), the control unit multiplexes the first physical channel and the second physical channel in the frequency direction by assigning the first physical channel to the side closer to the end in the frequency direction and assigning the second physical channel to the side closer to the center in the frequency direction in the frequency band to which the first physical channel and the second physical channel are assigned. (13)

[0428] A communication device, comprising:

[0429] A communication unit configured to perform wireless communication; and

[0430] A notification unit is configured to notify a terminal device of information regarding a switch between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks in the first physical channel and the second physical channel are different from each other, and the first physical channel and the second physical channel are assigned to receive control information from the terminal device during a predetermined time period in a time series. (14)

[0432] The communication device according to (13) includes:

[0433] A control unit configured to control the allocation of a first physical channel and a second physical channel during the predetermined time period.

[0434] In the second physical channel, there are more resource blocks and fewer symbols compared to the first physical channel. (15)

[0436] According to the communication device described in (14), the control unit assigns the second physical channel to the side closer to the rear in the time direction during the predetermined time period. (16)

[0438] According to the communication device described in (15), the control unit preferentially dispatches an index for mapping the control information to a second physical channel from the rear side of the time direction during the predetermined time period. (17)

[0440] According to the communication device of (15) or (16), the control unit allocates at least a portion of the second physical channel during the predetermined time period such that the corresponding position of the portion in the time direction and frequency direction becomes different from the other portions. (18)

[0442] According to any one of (14) to (17) of the communication apparatus, wherein the control unit assigns the first physical channel to the side closer to the end in the frequency direction of the frequency band to which the first physical channel is assigned. (19)

[0444] According to the communication device described in (18), the control unit preferentially dispatches an index from the end side of the frequency band for mapping the control information to the first physical channel. (20)

[0446] According to the communication device of (18) or (19), the control unit allocates at least a portion of the first physical channel during the predetermined time period such that the corresponding position of the portion in the time direction and frequency direction becomes different from the other portions. (twenty one)

[0448] According to the communication device described in (18) or (19), the control unit continuously assigns the first physical channel to one end of the frequency band during the predetermined time period. (twenty two)

[0450] A communication method, comprising:

[0451] Perform wireless communication; and

[0452] The system selectively switches between a first physical channel and a second physical channel, where the number of symbols and the number of resource blocks are different from each other, and the first physical channel and the second physical channel are assigned to transmit control information to the base station during a predetermined time period in the time series. (twenty three)

[0454] A communication method, comprising:

[0455] Perform wireless communication; and

[0456] The terminal device is notified of information regarding the switching between a first physical channel and a second physical channel, in which the number of symbols and the number of resource blocks are different from each other, and the first physical channel and the second physical channel are assigned to receive control information from the terminal device during a predetermined time period in the time series. (twenty four)

[0458] A program that causes a computer to perform the following steps:

[0459] Perform wireless communication; and

[0460] The system selectively switches between a first physical channel and a second physical channel, where the number of symbols and the number of resource blocks are different from each other, and the first physical channel and the second physical channel are assigned to transmit control information to the base station during a predetermined time period in the time series. (25)

[0462] A program that causes a computer to perform the following steps:

[0463] Perform wireless communication; and

[0464] The terminal device is notified of information regarding the switching between a first physical channel and a second physical channel, wherein the number of symbols and the number of resource blocks in the first physical channel and the second physical channel are different from each other, and the first physical channel and the second physical channel are assigned to receive control information from the terminal device during a predetermined time period in the time series.

[0465] List of reference symbols

[0466] 1. Base station equipment

[0467] 101 High-Level Processing Unit

[0468] 103 control unit

[0469] 105 receiving unit

[0470] 1051 decoding unit

[0471] 1053 demodulation unit

[0472] 1055 Demultiplexing Unit

[0473] 1057 Wireless Receiver Unit

[0474] 1059 Channel Measurement Unit

[0475] 107 Transmitting Unit

[0476] 1071 coding unit

[0477] 1073 modulation unit

[0478] 1075 multiplexing unit

[0479] 1077 Wireless Transmitter Unit

[0480] 1079 Link Reference Signal Generation Unit

[0481] 109 transceiver antenna

[0482] 130 Network Communication Unit

[0483] 2. Terminal device

[0484] 201 High-Level Processing Unit

[0485] 203 Control Unit

[0486] 205 receiving unit

[0487] 2051 decoding unit

[0488] 2053 demodulation unit

[0489] 2055 Demultiplexing Unit

[0490] 2057 Wireless Receiver Unit

[0491] 2059 Channel Measurement Unit

[0492] 207 Transmitting Unit

[0493] 2071 coding unit

[0494] 2073 modulation unit

[0495] 2075 multiplexing unit

[0496] 2077 Wireless Transmitting Unit

[0497] 2079 Link Reference Signal Generation Unit

[0498] 209 transceiver antenna

Claims

1. A communication device configured to communicate with a base station, the communication device comprising: Communication circuitry, configured to perform wireless communication; and The control circuit is configured to selectively switch between a first PUCCH and a second PUCCH based on the number of ACK / NACK bits transmitted via the Physical Uplink Control Channel (PUCCH), each of the first PUCCH and the second PUCCH being configured to transmit control information from the communication device to the base station. The number of first symbols in the first PUCCH differs from the number of second symbols in the second PUCCH. The first PUCCH and the second PUCCH are assigned to transmit control information to the base station during a predetermined time period in the time direction.

2. The communication device according to claim 1, wherein, Selective switching between the first PUCCH and the second PUCCH includes: If the number of bits in the ACK / NACK is greater than a predetermined value, the ACK / NACK is sent using the first PUCCH. If the number of bits in the ACK / NACK is less than the predetermined value, the ACK / NACK is sent using a second PUCCH.

3. The communication device according to claim 1, comprising: Send information to the base station indicating the capability of the Physical Uplink Control Channel (PUCCH).

4. The communication device according to claim 1, wherein, The control circuit further switches between the first PUCCH and the second PUCCH based on notifications from the base station.

5. The communication device according to claim 4, wherein, The notification is sent based on the capabilities of the communication device, wherein the capabilities include at least one of the following: a parameter indicating a terminal category recommended for installation of high-performance processing capabilities, a parameter indicating whether self-contained transmission is implemented, a parameter indicating whether a second PUCCH is sent, and a parameter indicating the PUCCH generation processing time.

6. A communication device configured to operate as a base station, the communication device comprising: Communication circuitry, configured to perform wireless communication; and The receiving circuit is configured to receive a first physical uplink control channel (PUCCH) and / or a second PUCCH transmitted by the terminal device. The control circuitry is configured to selectively switch between the first PUCCH and the second PUCCH based on the number of ACK / NACK bits transmitted via PUCCH. Each of the first PUCCH and the second PUCCH is configured to send control information from the terminal device to the communication device. The number of first symbols in the first PUCCH is different from the number of second symbols in the second PUCCH. The first PUCCH and the second PUCCH are assigned to transmit control information during a predetermined time period in the time direction.

7. The communication device according to claim 6, wherein, Selective switching between the first PUCCH and the second PUCCH includes: If the number of bits in the ACK / NACK is greater than a predetermined value, the ACK / NACK is received using the first PUCCH. If the number of bits in the ACK / NACK is less than the predetermined value, the ACK / NACK is received using a second PUCCH.

8. The communication device according to claim 6, comprising: Receive information from the terminal device indicating the capability of the Physical Uplink Control Channel (PUCCH).

9. The communication device according to claim 6, wherein, The control circuit further switches between a first PUCCH and a second PUCCH based on a notification received from the terminal device.

10. The communication device according to claim 9, wherein, The notification is sent based on the capabilities of the communication device, wherein the capabilities include at least one of the following: a parameter indicating a terminal category recommended for installation of high-performance processing capabilities, a parameter indicating whether self-contained transmission is implemented, a parameter indicating whether a second PUCCH is sent, and a parameter indicating the PUCCH generation processing time.

11. A communication method performed by a communication device configured to communicate with a base station, the method comprising: Perform wireless communication; as well as Based on the number of ACK / NACK bits transmitted via the Physical Uplink Control Channel (PUCCH), selective switching is performed between the first PUCCH and the second PUCCH. Each of the first PUCCH and the second PUCCH is configured to transmit control information from the communication device to the base station. The number of first symbols and first resource blocks in the first PUCCH differs from the number of second symbols and second resource blocks in the second PUCCH. The first PUCCH and the second PUCCH are assigned by the base station for use by the communication equipment during one or more predetermined time periods.

12. A communication method performed by a communication device configured to operate as a base station, the method comprising: Perform wireless communication; as well as The terminal device is notified of information regarding a switch between a first Physical Uplink Control Channel (PUCCH) and a second PUCCH, each of which is configured to transmit control information from the terminal device to the communication device. The notification is sent based on the capabilities of the communication device, which include at least one of the following: parameters indicating a recommended terminal category for high-performance processing capabilities, parameters indicating whether self-contained transmission is implemented, parameters indicating whether to send the second PUCCH, and parameters indicating the PUCCH generation and processing time. The number of first symbols and first resource blocks in the first PUCCH differs from the number of second symbols and second resource blocks in the second PUCCH. The first PUCCH and the second PUCCH are allocated by the communication device for use by the terminal device during one or more predetermined time periods.

13. A non-transitory computer-readable product comprising instructions for enabling a computer to communicate with a base station: Perform wireless communication; and Based on the number of ACK / NACK bits transmitted via the Physical Uplink Control Channel (PUCCH), selective switching is performed between the first PUCCH and the second PUCCH. Each of the first PUCCH and the second PUCCH is configured to transmit control information from the communication device to the base station. in, The number of first symbols and first resource blocks in the first PUCCH differs from the number of second symbols and second resource blocks in the second PUCCH, and The first PUCCH and the second PUCCH are assigned by the base station for use by the communication equipment during one or more predetermined time periods.

14. A non-transitory computer-readable product comprising instructions for instructing a computer configured as a communication device to: Perform wireless communication; and The terminal device is notified of information regarding a switch between a first Physical Uplink Control Channel (PUCCH) and a second PUCCH, each of which is configured to transmit control information from the terminal device to the communication device. The notification is sent based on the capabilities of the communication device, which include at least one of the following: parameters indicating a recommended terminal category for high-performance processing capabilities, parameters indicating whether self-contained transmission is implemented, parameters indicating whether to send the second PUCCH, and parameters indicating the PUCCH generation and processing time. in, The number of first symbols and first resource blocks in the first PUCCH differs from the number of second symbols and second resource blocks in the second PUCCH, and The first PUCCH and the second PUCCH are allocated by the communication device for use by the terminal device during one or more predetermined time periods.

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