JP2019145859A - Terminal device, base station device, communication method, and integrated circuit - Google Patents

Abstract

To efficiently transmit uplink data.SOLUTION: A terminal device receives a PDCCH including downlink control information, and transmits one bundle on the basis of the downlink control information. The bundle includes a plurality of transmissions continuous in a time domain. A redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information. The redundancy version for each of a plurality of other continuous transmissions excluding the first transmission is given based at least on a parameter indicated by a higher-layer signal and the redundancy version for the first transmission.SELECTED DRAWING: Figure 3

Description

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

Wireless access method and wireless network for cellular mobile communications (hereinafter referred to as “Long Ter
m Evolution (LTE) "or" Evolved Universal Terrestrial Radio Access: EUTRA ") is being studied in the 3rd Generation Partnership Project (3GPP) (Non-Patent Document 1). In LTE, a base station apparatus is also called eNodeB (evolved NodeB) and a terminal apparatus is also called UE (User Equipment).
LTE is a cellular communication system in which a plurality of areas covered by a base station apparatus are arranged in a cell shape. Here, a single base station apparatus may manage a plurality of cells.

  In 3GPP, latency reduction enhancements are being considered. For example, as a reduction in waiting time reduction, a scheduling request high-speed grant (Scheduling request first grant) and a pre-scheduled high-speed grant (Pre-scheduled first grant) have been studied (Non-patent Document 2).

"3GPP TS 36.321 V12.6.0 (2015-06) Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification (Release 12)", 8th-July 2015. "L2 enhancements to reduce latency", R2-153490, Ericsson, 3GPP TSG-RAN WG2 # 91, Beijing, China, 24-28 August 2015. “Status Report to TSG”, RP-161022, Ericsson, 3GPP TSG-RAN meeting # 72, Busan, Korea, 13-16 June 2016.

  The present invention provides a terminal device, a base station device, a communication method, and an integrated circuit that can efficiently transmit uplink data.

(1) In order to achieve the above-described object, the aspect of the present invention takes the following means. That is, a terminal apparatus according to an aspect of the present invention includes a receiving unit that receives PDCCH (Physical Downlink Control Channel) including downlink control information, and a transmitting unit that transmits one bundle based on the downlink control information. The bundle includes a plurality of transmissions consecutive in the time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, excluding the first transmission The redundancy version for each of the other consecutive transmissions is provided based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(2) Moreover, the terminal device of the terminal device according to one aspect of the present invention includes a receiving unit that receives a PDCCH (Physical Downlink Control Channel) including downlink control information, and one bundle based on the downlink control information. A decoding unit that executes decoding of the first and second bundles, wherein the bundle includes a plurality of transmissions continuous in a time domain, and a redundancy version for the first transmission in the bundle is determined by a field included in the downlink control information. A redundancy version for each of a plurality of consecutive transmissions other than the first transmission shown is provided based at least on the parameters indicated by higher layer signals and the redundancy version for the first transmission.

(3) In addition, the base station apparatus according to an embodiment of the present invention receives a transmission unit that transmits PDCCH (Physical Downlink Control Channel) including downlink control information, and transmission of one bundle based on the downlink control information. The bundle includes a plurality of transmissions consecutive in the time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, The redundancy version for each of a plurality of consecutive transmissions other than the transmission of is given based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(4) Also, the base station apparatus according to one aspect of the present invention transmits a PDCCH (Physical Downlink Control Channel) including downlink control information, and transmits one bundle based on the downlink control information. And the bundle includes a plurality of transmissions consecutive in the time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, and the first transmission is The redundancy version for each of the other consecutive multiple transmissions is given based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(5) Moreover, the communication method of the terminal device in one aspect of the present invention receives a PDCCH (Physical Downlink Control Channel) including downlink control information, and transmits one bundle based on the downlink control information. The bundle includes a plurality of transmissions that are consecutive in the time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, and other consecutive transmissions except the first transmission. A redundancy version for each of the plurality of transmissions is provided based at least on parameters indicated by higher layer signals and the redundancy version for the first transmission.

(6) Moreover, the communication method of the terminal device in one aspect of the present invention receives a PDCCH (Physical Downlink Control Channel) including downlink control information, and decodes one bundle based on the downlink control information. The bundle includes a plurality of transmissions that are consecutive in the time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, except for the first transmission A redundancy version for each of a plurality of consecutive transmissions is provided based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(7) Moreover, the communication method of the base station apparatus in one aspect of the present invention transmits a PDCCH (Physical Downlink Control Channel) including downlink control information and receives transmission of one bundle based on the downlink control information. The bundle includes a plurality of transmissions that are continuous in the time domain, and the redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, and other than the first transmission. A redundancy version for each of a plurality of successive transmissions is provided based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(8) In addition, in the communication method of the base station apparatus according to an aspect of the present invention, a PDCCH (Physical Downlink Control Channel) including downlink control information is transmitted, and one bundle is transmitted based on the downlink control information. The bundle includes a plurality of transmissions that are continuous in the time domain, and the redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, and other than the first transmission. A redundancy version for each of a plurality of successive transmissions is provided based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(9) Further, the integrated circuit of the terminal device according to one aspect of the present invention includes a receiving circuit that receives a PDCCH (Physical Downlink Control Channel) including downlink control information, and one bundle based on the downlink control information. And wherein the bundle includes a plurality of transmissions that are continuous in the time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, The redundancy version for each of a plurality of consecutive transmissions other than the first transmission is provided based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(10) An integrated circuit of a terminal device according to an aspect of the present invention includes a receiving circuit that receives a PDCCH (Physical Downlink Control Channel) including downlink control information, and one bundle based on the downlink control information. A decoding circuit configured to perform decoding of: the bundle includes a plurality of transmissions continuous in a time domain, and a redundancy version for the first transmission in the bundle is determined by a field included in the downlink control information A redundancy version for each of a plurality of consecutive transmissions other than the first transmission shown is provided based at least on the parameters indicated by higher layer signals and the redundancy version for the first transmission.

(11) An integrated circuit of a base station apparatus according to an aspect of the present invention includes a transmission circuit that transmits a PDCCH (Physical Downlink Control Channel) including downlink control information, and one bundle based on the downlink control information. A reception circuit for receiving a transmission, wherein the bundle includes a plurality of transmissions continuous in a time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information The redundancy version for each of the other consecutive transmissions other than the first transmission is given based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(12) Further, the integrated circuit of the base station apparatus according to one aspect of the present invention transmits a PDCCH (Physical Downlink Control Channel) including downlink control information, and transmits one bundle based on the downlink control information. And wherein the bundle includes a plurality of transmissions consecutive in the time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information, The redundancy version for each of a plurality of consecutive transmissions other than the transmission of is given based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

  According to the present invention, uplink data can be transmitted efficiently.

It is a figure which shows the concept of the radio | wireless communications system in this embodiment. It is a figure which shows the structure of the slot in this embodiment. It is a schematic block diagram which shows the structure of the terminal device 1 in this embodiment. It is a schematic block diagram which shows the structure of the base station apparatus 3 in this embodiment. It is a figure which shows the example of the special field (Special fields) for activation (activation) of the semipersistent scheduling in this embodiment. It is a figure which shows the example of the special field (Special fields) for release (release) of the semipersistent scheduling in this embodiment. It is a figure for demonstrating the example of the non-empty transmission (Non-empty transmission) and the empty transmission (Empty transmission) in this embodiment. It is a figure for demonstrating the clearing method of the grant set in the 1st operation | movement in this embodiment. It is a figure for demonstrating the transmission method of the uplink data in this embodiment. It is a figure which shows the 1st example for demonstrating NDI in this embodiment. It is a figure which shows the 2nd example for demonstrating NDI in this embodiment. It is a figure which shows the 3rd example for demonstrating NDI in this embodiment. It is a figure for demonstrating the transmission method of the uplink data in this embodiment. It is a figure which shows an example of the process of an encoding of the codeword (transport block) in this embodiment. It is a figure which shows an example of the rate matching in this embodiment. It is a figure which shows an example of the bit selection and removal of this embodiment. It is a figure for demonstrating the 1st determination method of the redundancy version for each of the transmission in a bundle in this embodiment. It is a figure for demonstrating the 2nd determination method of the redundancy version for each of the transmission in a bundle in this embodiment. It is a figure for demonstrating the 3rd determination method of the redundancy version for each of the transmission in a bundle in this embodiment.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 is a conceptual diagram of a wireless communication system in the present embodiment. In FIG. 1, the wireless communication system includes terminal devices 1 </ b> A to 1 </ b> C and a base station device 3. Hereinafter, the terminal devices 1A to 1C are also referred to as terminal devices 1.

  The physical channel and physical signal in this embodiment will be described.

In FIG. 1, the following uplink physical channels are used in uplink wireless communication from the terminal device 1 to the base station device 3. Here, the uplink physical channel is used to transmit information output from an upper layer.
-PUCCH (Physical Uplink Control Channel)
・ PUSCH (Physical Uplink Shared Channel)
・ PRACH (Physical Random Access Channel)
The PUCCH is used for transmitting uplink control information (UPCI).

The PUSCH is used to transmit uplink data (Uplink-Shared Channel: UL-SCH).

Here, the base station device 3 and the terminal device 1 exchange (transmit / receive) signals in a higher layer. For example, the base station device 3 and the terminal device 1 may perform RRC signaling (RRC message: Radio Resource Control) in a radio resource control (RRC) layer.
Control message, RRC information: also called Radio Resource Control information) may be transmitted and received. Further, the base station device 3 and the terminal device 1 may transmit and receive a MAC control element in a MAC (Medium Access Control) layer. Where R
RC signaling and / or MAC control elements are also referred to as higher layer signaling.

PUSCH may be used to transmit RRC signaling and MAC control elements. Here, the RRC signaling transmitted from the base station apparatus 3 may be common signaling for a plurality of terminal apparatuses 1 in the cell. Further, the RRC signaling transmitted from the base station apparatus 3 may be dedicated signaling (also referred to as dedicated signaling) for a certain terminal apparatus 1. That is, user device specific (user device specific) information may be transmitted to a certain terminal device 1 using dedicated signaling.

  The PRACH is used for transmitting a random access preamble.

In FIG. 1, the following uplink physical signals are used in uplink wireless communication. Here, the uplink physical signal is not used for transmitting information output from the higher layer, but is used by the physical layer.
・ Uplink Reference Signal (UL RS)
In this embodiment, the following two types of uplink reference signals are used.
DMRS (Demodulation Reference Signal)
・ SRS (Sounding Reference Signal)
DMRS relates to transmission of PUSCH or PUCCH. DMRS is time-multiplexed with PUSCH or PUCCH. The base station apparatus 3 uses DMRS to perform propagation channel correction for PUSCH or PUCCH. Hereinafter, transmitting both PUSCH and DMRS is simply referred to as transmitting PUSCH. Hereinafter, transmitting both PUCCH and DMRS is simply referred to as transmitting PUCCH.

  SRS is not related to PUSCH or PUCCH transmission. The base station apparatus 3 uses SRS to measure the uplink channel state.

In FIG. 1, the following downlink physical channels are used in downlink wireless communication from the base station apparatus 3 to the terminal apparatus 1. Here, the downlink physical channel is used to transmit information output from an upper layer.
・ PBCH (Physical Broadcast Channel)
・ PCFICH (Physical Control Format Indicator Channel)
・ PHICH (Physical Hybrid automatic repeat request Indicator Channel)
・ PDCCH (Physical Downlink Control Channel)
・ EPDCCH (Enhanced Physical Downlink Control Channel)
・ PDSCH (Physical Downlink Shared Channel)
・ PMCH (Physical Multicast Channel)
The PBCH is used to broadcast a master information block (Master Information Block: MIB, Broadcast Channel: BCH) commonly used in the terminal device 1.

PCFICH is used to transmit information indicating a region (OFDM symbol) used for transmission of PDCCH.

  The PHICH is used to transmit an HARQ indicator (HARQ feedback, response information) indicating ACK (ACKnowledgement) or NACK (Negative ACKnowledgement) for uplink data (Uplink Shared Channel: UL-SCH) received by the base station apparatus 3. It is done.

PDCCH and EPDCCH are used for transmitting downlink control information (Downlink Control Information: DCI). Here, for transmission of downlink control information,
A plurality of DCI formats are defined. That is, fields for downlink control information are defined in the DCI format and mapped to information bits.

  For example, as a DCI format for the downlink, a DCI format used for scheduling one PDSCH (transmission of one downlink transport block) in one cell (for example, DCI format 1, DCI format 1A, and / or DCI format 1C) may be defined.

Here, the downlink DCI format includes information related to PDSCH scheduling. For example, the DCI format for the downlink includes a carrier indicator field (CIF), information on HARQ process number (HARQ process number), information on MCS (Modulation and Coding Scheme), information on redundancy version (Redundancy version) And / or downlink control information such as information on resource block assignment (Resource block assignment). Here, the DCI format for the downlink is also referred to as a downlink grant and / or a downlink assignment.

  Further, for example, as a DCI format for uplink, DCI formats (for example, DCI format 0, DCI format 4) used for scheduling one PUSCH (transmission of one uplink transport block) in one cell are used. Defined.

Here, the information regarding PUSCH scheduling is included in the DCI format for the uplink. For example, the DCI format for the uplink includes a carrier indicator field (CIF), information on a transmission power command (TPC command) for a scheduled PUSCH (TPC command for scheduled PUSCH), and information on a cyclic shift for DMRS. (Cyclic shift DMRS), information about MCS and / or redundancy version (Modulation and
Includes downlink control information such as coding scheme and / or redundancy version) and / or resource block assignment and / or hopping resource allocation (NDI) and New Data Indicator (NDI) It is. Here, the DCI format for the uplink is also referred to as an uplink grant and / or an uplink assignment. NDI and redundancy version are also referred to as HARQ information.

When the PDSCH resource is scheduled using the downlink assignment, the terminal device 1 may receive the downlink data using the scheduled PDSCH. Moreover, when the PUSCH resource is scheduled using the uplink grant, the terminal device 1 may transmit the uplink data and / or the uplink control information using the scheduled PUSCH.

Here, the RNTI assigned to the terminal device 1 by the base station device 3 is used for transmission of downlink control information (transmission on the PDCCH). Specifically, a CRC (Cyclic Redundancy Check) parity bit is added to the DCI format (which may be downlink control information), and after the CRC parity bit is added, the CRC parity bit is scrambled by the RNTI. Here, the CRC parity bit added to the DCI format may be obtained from the payload of the DCI format.

  The terminal device 1 tries to decode the DCI format to which the CRC parity bit scrambled by the RNTI is added, and detects the DCI format in which the CRC is successful as the DCI format addressed to itself (also referred to as blind decoding). ) That is, the terminal device 1 may detect the PDCCH accompanied by the CRC scrambled by the RNTI. Further, the terminal device 1 may detect a PDCCH accompanied by a DCI format to which a CRC parity bit scrambled by RNTI is added.

Here, RNTI includes C-RNTI (Cell-Radio Network Temporary Identifier).
May be included. The C-RNTI is a unique (unique) identifier for the terminal device 1 used for identification of RRC connection and scheduling. C-RNTI may also be used for unicast transmissions that are dynamically scheduled. The uplink grant to which the CRC parity bit scrambled by C-RNTI is added is also referred to as DS (Dynamic Scheduling) grant, uplink grant related to C-RNTI, and uplink grant addressed to C-RNTI.

RNTI includes SPS C-RNTI (Semi-Persistent Scheduling C-RNTI).
May be included. The SPS C-RNTI is a unique (unique) identifier for the terminal device 1 that is used for semi-persistent scheduling. SPS C-RNTI may also be used for semi-persistently scheduled unicast transmissions.

  Here, semi-persistently scheduled transmission includes the meaning of periodically scheduled transmission. For example, SPS C-RNTI may be utilized for semi-persistently scheduled transmission activation, reactivation, and / or retransmission. Hereinafter, activation may include the meaning of reactivation and / or retransmission.

SPS C-RNTI may also be utilized for the release and / or deactivation of semi-persistently scheduled transmissions. Hereinafter, the release may include the meaning of deactivation. Here, a new RNTI may be defined to reduce the waiting time. For example, the SPS C-RNTI in the present embodiment may include a newly defined RNTI for reducing the waiting time.

The PDSCH is used to transmit downlink data (Downlink Shared Channel: DL-SCH). The PDSCH is used for transmitting a system information message. Here, the system information message may be cell specific (cell specific) information. System information is included in RRC signaling. The PDSCH is used to transmit RRC signaling and a MAC control element.

  The PMCH is used for transmitting multicast data (Multicast Channel: MCH).

In FIG. 1, the following downlink physical signals are used in downlink wireless communication. Here, the downlink physical signal is not used for transmitting information output from the upper layer, but is used by the physical layer.
・ Synchronization signal (SS)
・ Downlink Reference Signal (DL RS)
The synchronization signal is used for the terminal device 1 to synchronize the downlink frequency domain and time domain. In the TDD scheme, the synchronization signal is arranged in subframes 0, 1, 5, and 6 in the radio frame. In the FDD scheme, the synchronization signal is arranged in subframes 0 and 5 in the radio frame.

  The downlink reference signal is used for the terminal device 1 to perform channel correction of the downlink physical channel. Here, the downlink reference signal is used for the terminal apparatus 1 to calculate downlink channel state information.

  Here, the downlink physical channel and the downlink physical signal are collectively referred to as a downlink signal. The uplink physical channel and the uplink physical signal are collectively referred to as an uplink signal. The downlink physical channel and the uplink physical channel are collectively referred to as a physical channel. The downlink physical signal and the uplink physical signal are collectively referred to as a physical signal.

BCH, MCH, UL-SCH and DL-SCH are transport channels. A channel used in a medium access control (MAC) layer is referred to as a transport channel. A transport channel unit used in the MAC layer is also referred to as a transport block (TB) or a MAC PDU (Protocol Data Unit). In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) control is performed for each transport block. The transport block is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, the transport block is mapped to a code word, and an encoding process is performed for each code word.

  Hereinafter, carrier aggregation will be described.

  In the present embodiment, one or a plurality of serving cells may be set for the terminal device 1. A technique in which the terminal device 1 communicates via a plurality of serving cells is referred to as cell aggregation or carrier aggregation.

  Here, this embodiment may be applied to each of one or a plurality of serving cells set for the terminal device 1. Further, the present embodiment may be applied to a part of one or a plurality of serving cells set for the terminal device 1. In addition, the present embodiment may be applied to each of one or a plurality of serving cell groups set for the terminal device 1.

In the present embodiment, TDD (Time Division Duplex) and / or FDD (Frequency Division Duplex) may be applied. Here, in the case of carrier aggregation, TDD or FDD may be applied to all of one or a plurality of serving cells. In the case of carrier aggregation, a serving cell to which TDD is applied and a serving cell to which FDD is applied may be aggregated. Here, the frame structure corresponding to FDD is also referred to as frame structure type 1 (Frame structure type 1). The frame structure corresponding to TDD is also referred to as frame structure type 2 (Frame structure type 2).

Here, the set one or more serving cells may include one primary cell and one or more secondary cells. For example, a primary cell is a serving cell in which an initial connection establishment procedure has been performed, a serving cell that has initiated a connection re-establishment procedure, or a cell designated as a primary cell in a handover procedure. May be. Here, the secondary cell may be set at the time when the RRC connection is established or later.

  Here, in the downlink, a carrier corresponding to a serving cell is referred to as a downlink component carrier. In the uplink, a carrier corresponding to a serving cell is referred to as an uplink component carrier. Further, the downlink component carrier and the uplink component carrier are collectively referred to as a component carrier.

  Moreover, the terminal device 1 may perform transmission and / or reception on a plurality of physical channels simultaneously in one or a plurality of serving cells (component carriers). Here, one physical channel may be transmitted in one serving cell (component carrier) among a plurality of serving cells (component carriers).

The size of the various fields in the time domain is expressed by the number of time units T _s = 1 / (15000 · 2048) seconds. The length of the radio frame is T _f = 307200 · T _s = 10 ms. Each radio frame includes 10 subframes continuous in the time domain. The length of each _subframe is T _subframe = 30720 · T _s = 1 ms. Each subframe i includes two consecutive slots in the time domain. Two consecutive slots in the time domain, the slot of the slot number n _s within a radio frame 2i, and the slot number n _s within a radio frame is 2i + 1 slot. The length of each slot is T _slot = 153600 · n _s = 0.5 ms. Each radio frame includes 10 subframes continuous in the time domain. Each radio frame includes 20 consecutive slots (n _s = 0, 1,..., 19) in the time domain. That is, the radio frame, subframe, and slot are fields in the time domain. The field in the time domain is also referred to as TTI (Transmission Time Interval).

  Hereinafter, the configuration of the slot in the present embodiment will be described.

  FIG. 2 is a diagram showing the configuration of the slot in the present embodiment. In FIG. 2, the horizontal axis represents the time axis, and the vertical axis represents the frequency axis. Here, normal CP (normal cyclic prefix) may be applied to the OFDM symbol. Also, an extended CP (extended Cyclic Prefix) may be applied to the OFDM symbol. A physical signal or physical channel transmitted in each slot is represented by a resource grid.

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

  Here, the resource block may be used to express a mapping of a certain physical channel (such as PDSCH or PUSCH) to a resource element. In addition, virtual resource blocks and physical resource blocks may be defined as resource blocks. A physical channel may first be mapped to a virtual resource block. Thereafter, the virtual resource block may be mapped to a physical resource block. One physical resource block may be defined from 7 consecutive OFDM symbols or SC-FDMA symbols in the time domain and 12 consecutive subcarriers in the frequency domain. Therefore, one physical resource block may be composed of (7 × 12) resource elements. One physical resource block may correspond to one slot in the time domain and 180 kHz in the frequency domain. Also, physical resource blocks may be numbered from 0 in the frequency domain.

  Hereinafter, the configuration of the apparatus according to the present embodiment will be described.

  FIG. 3 is a schematic block diagram showing the configuration of the terminal device 1 in the present embodiment. As shown in the figure, the terminal device 1 includes an upper layer processing unit 101, a control unit 103, a receiving unit 105, a transmitting unit 107, and a transmitting / receiving antenna unit 109. The upper layer processing unit 101 includes a radio resource control unit 1011, a scheduling information interpretation unit 1013, and an SPS control unit 1015. The reception unit 105 includes a decoding unit 1051, a demodulation unit 1053, a demultiplexing unit 1055, a radio reception unit 1057, and a channel measurement unit 1059. The transmission unit 107 includes an encoding unit 1071, a modulation unit 1073, a multiplexing unit 1075, a radio transmission unit 1077, and an uplink reference signal generation unit 1079.

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

  The radio resource control unit 1011 included in the upper layer processing unit 101 manages various setting information / parameters of the own apparatus. The radio resource control unit 1011 sets various setting information / parameters based on the upper layer signal received from the base station apparatus 3. That is, the radio resource control unit 1011 sets various setting information / parameters based on information indicating various setting information / parameters received from the base station apparatus 3. Also, the radio resource control unit 1011 generates information arranged in each uplink channel and outputs the information to the transmission unit 107. The radio resource control unit 1011 is also referred to as a setting unit 1011.

  Here, the scheduling information interpretation unit 1013 included in the upper layer processing unit 101 interprets the DCI format (scheduling information) received via the reception unit 105, and based on the interpretation result of the DCI format, the reception unit 105, Control information is generated to control the transmission unit 107 and output to the control unit 103.

  Further, the SPS control unit 1015 included in the upper layer processing unit 101 performs control related to SPS based on various setting information, information related to SPS such as parameters, and the situation.

Further, the control unit 103 generates a control signal for controlling the receiving unit 105 and the transmitting unit 107 based on the control information from the higher layer processing unit 101. Control unit 103 outputs the generated control signal to receiving unit 105 and transmitting unit 107 to control receiving unit 105 and transmitting unit 107.

  The receiving unit 105 also separates, demodulates, and decodes the received signal received from the base station apparatus 3 via the transmission / reception antenna unit 109 according to the control signal input from the control unit 103, and processes the decoded information in an upper layer process. Output to the unit 101.

Further, the radio reception unit 1057 converts a downlink signal received via the transmission / reception antenna unit 109 into a baseband signal by orthogonal demodulation (down conversion: down covert).
, Remove unnecessary frequency components, control the amplification level so that the signal level is properly maintained, perform quadrature demodulation based on the in-phase and quadrature components of the received signal, and digitally convert the quadrature demodulated analog signal Convert to signal. Radio receiving section 1057 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal, performs Fast Fourier Transform (FFT) on the signal from which CP has been removed, and converts the signal in the frequency domain. Extract.

  Further, the demultiplexing unit 1055 demultiplexes the extracted signal into PHICH, PDCCH, EPDCCH, PDSCH, and downlink reference signal. Further, demultiplexing section 1055 compensates the propagation path of PHICH, PDCCH, EPDCCH, and PDSCH from the estimated propagation path value input from channel measurement section 1059. Also, the demultiplexing unit 1055 outputs the demultiplexed downlink reference signal to the channel measurement unit 1059.

Demodulation section 1053 multiplies the PHICH by a corresponding code and synthesizes it, demodulates the synthesized signal using a Binary Phase Shift Keying (BPSK) modulation method, and outputs the result to decoding section 1051. Decoding section 1051 decodes the PHICH addressed to the own apparatus, and outputs the decoded HARQ indicator to higher layer processing section 101. Demodulation section 1053 performs QPSK modulation demodulation on PDCCH and / or EPDCCH, and outputs the result to decoding section 1051. Decoding section 1051 attempts to decode PDCCH and / or EPDCCH, and outputs the decoded downlink control information and the RNTI corresponding to the downlink control information to higher layer processing section 101 when the decoding is successful.

  Also, the demodulation unit 1053 demodulates the modulation scheme notified by the downlink grant such as QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, etc., to the PDSCH, and outputs it to the decoding unit 1051 To do. The decoding unit 1051 performs decoding based on the information regarding the coding rate notified by the downlink control information, and outputs the decoded downlink data (transport block) to the higher layer processing unit 101.

  Also, the channel measurement unit 1059 measures the downlink path loss and channel state from the downlink reference signal input from the demultiplexing unit 1055, and outputs the measured path loss and channel state to the higher layer processing unit 101. Also, channel measurement section 1059 calculates an estimated value of the downlink propagation path from the downlink reference signal, and outputs it to demultiplexing section 1055. The channel measurement unit 1059 performs channel measurement and / or interference measurement in order to calculate CQI (may be CSI).

  Further, the transmission unit 107 generates an uplink reference signal according to the control signal input from the control unit 103, encodes and modulates uplink data (transport block) input from the higher layer processing unit 101, PUCCH, PUSCH, and the generated uplink reference signal are multiplexed and transmitted to base station apparatus 3 via transmission / reception antenna section 109. Moreover, the transmission part 107 transmits uplink control information.

  Also, the encoding unit 1071 performs encoding such as convolutional encoding and block encoding on the uplink control information input from the higher layer processing unit 101. The encoding unit 1071 performs turbo encoding based on information used for PUSCH scheduling.

  Also, the modulation unit 1073 uses the modulation scheme in which the encoded bits input from the encoding unit 1071 are notified by downlink control information such as BPSK, QPSK, 16QAM, and 64QAM, or a modulation scheme predetermined for each channel. Modulate. Modulator 1073 determines the number of spatially multiplexed data sequences based on information used for PUSCH scheduling, and transmits the same PUSCH using MIMO (Multiple Input Multiple Output) SM (Spatial Multiplexing). A plurality of uplink data are mapped to a plurality of sequences, and precoding is performed on the sequences.

Also, the uplink reference signal generation unit 1079 is a physical layer cell identifier (physical layer cell identity: referred to as PCI, Cell ID, etc.) for identifying the base station device 3, a bandwidth for arranging the uplink reference signal, an uplink A sequence determined by a predetermined rule (formula) is generated based on a cyclic shift notified by the link grant, a parameter value for generating a DMRS sequence, and the like. The multiplexing unit 1075 rearranges the PUSCH modulation symbols in parallel according to the control signal input from the control unit 103, and then performs discrete Fourier transform (Discrete transform).
Fourier Transform (DFT). Also, multiplexing section 1075 multiplexes the PUCCH and PUSCH signals and the generated uplink reference signal for each transmission antenna port. That is, multiplexing section 1075 arranges the PUCCH and PUSCH signals and the generated uplink reference signal in the resource element for each transmission antenna port.

  Radio transmission section 1077 performs inverse fast Fourier transform (IFFT) on the multiplexed signal to generate an SC-FDMA symbol, adds a CP to the generated SC-FDMA symbol, and Generates a band digital signal, converts the baseband digital signal to an analog signal, removes excess frequency components using a low-pass filter, up-converts to a carrier frequency, power-amplifies, and transmit / receive antenna It outputs to the part 109 and transmits.

  FIG. 4 is a schematic block diagram showing the configuration of the base station device 3 in the present embodiment. As shown in the figure, the base station apparatus 3 includes an upper layer processing unit 301, a control unit 303, a reception unit 305, a transmission unit 307, and a transmission / reception antenna unit 309. The higher layer processing unit 301 includes a radio resource control unit 3011, a scheduling unit 3013, and an SPS control unit 3015. The reception unit 305 includes a decoding unit 3051, a demodulation unit 3053, a demultiplexing unit 3055, a wireless reception unit 3057, and a channel measurement unit 3059. The transmission unit 307 includes an encoding unit 3071, a modulation unit 3073, a multiplexing unit 3075, a radio transmission unit 3077, and a downlink reference signal generation unit 3079.

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

The radio resource control unit 3011 included in the upper layer processing unit 301 generates downlink data (transport block), system information, RRC message, MAC CE (Control Element), and the like arranged in the downlink PDSCH, Alternatively, it is acquired from the upper node and output to the transmission unit 307. The radio resource control unit 3011 manages various setting information / parameters of each terminal device 1. Radio resource control unit 3011
May set various setting information / parameters for each terminal device 1 via upper layer signals. That is, the radio resource control unit 1011 transmits / notifies information indicating various setting information / parameters. The radio resource control unit 3011 is also referred to as a setting unit 3011.

  Further, the scheduling unit 3013 included in the higher layer processing unit 301 assigns physical channels (PDSCH and PUSCH) based on the received channel state information, the channel estimation value input from the channel measurement unit 3059, the channel quality, and the like. And the coding rate and modulation scheme and transmission power of subframes, physical channels (PDSCH and PUSCH), and the like. Based on the scheduling result, the scheduling unit 3013 generates control information (for example, DCI format) for controlling the reception unit 305 and the transmission unit 307 and outputs the control information to the control unit 303. The scheduling unit 3013 further determines timing for performing transmission processing and reception processing.

  The SPS control unit 3015 included in the upper layer processing unit 301 performs control related to SPS based on various setting information and information and status related to SPS such as parameters.

  Further, the control unit 303 generates a control signal for controlling the reception unit 305 and the transmission unit 307 based on the control information from the higher layer processing unit 301. The control unit 303 outputs the generated control signal to the reception unit 305 and the transmission unit 307 and controls the reception unit 305 and the transmission unit 307.

The receiving unit 305 separates, demodulates, and decodes the received signal received from the terminal device 1 via the transmission / reception antenna unit 309 according to the control signal input from the control unit 303, and the decoded information is the upper layer processing unit 301. Output to. The radio reception unit 3057 converts the uplink signal received via the transmission / reception antenna unit 309 into a baseband signal by orthogonal demodulation (down covert), removes unnecessary frequency components, and has a signal level of The amplification level is controlled so as to be appropriately maintained, and quadrature demodulation is performed based on the in-phase component and the quadrature component of the received signal, and the analog signal subjected to the quadrature demodulation is converted into a digital signal. The receiving unit 305 receives uplink control information.

Radio receiving section 3057 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal. Radio receiving section 3057 performs Fast Fourier Transform (FFT) on the signal from which CP has been removed, extracts a signal in the frequency domain, and outputs the signal to demultiplexing section 3055.

  The demultiplexing unit 1055 demultiplexes the signal input from the radio reception unit 3057 into signals such as PUCCH, PUSCH, and uplink reference signal. Note that this separation is performed based on radio resource allocation information included in the uplink grant that is determined in advance by the radio resource control unit 3011 by the base station device 3 and notified to each terminal device 1. In addition, demultiplexing section 3055 compensates for the propagation paths of PUCCH and PUSCH from the propagation path estimation value input from channel measurement section 3059. Further, the demultiplexing unit 3055 outputs the separated uplink reference signal to the channel measurement unit 3059.

Further, the demodulator 3053 performs inverse discrete Fourier transform (IDFT) on the PUSCH, obtains modulation symbols, and performs BPSK (Binary Phase Shift Keying), QPSK, 16QAM
, 64QAM, or the like, or the device itself demodulates the received signal using a modulation scheme notified to each terminal device 1 in advance by an uplink grant. The demodulator 3053 uses the MIMO SM based on the number of spatially multiplexed sequences previously notified to each terminal device 1 by the uplink grant and information indicating precoding to be performed on the sequences. A plurality of uplink data modulation symbols transmitted on the PUSCH are separated.

  Also, the decoding unit 3051 encodes the demodulated PUCCH and PUSCH encoded bits in a predetermined encoding scheme, or a code that the device itself notifies the terminal device 1 in advance with an uplink grant. The decoding is performed at the conversion rate, and the decoded uplink data and the uplink control information are output to the upper layer processing unit 101. When PUSCH is retransmitted, decoding section 3051 performs decoding using the encoded bits held in the HARQ buffer input from higher layer processing section 301 and the demodulated encoded bits. Channel measurement section 309 measures an estimated channel value, channel quality, and the like from the uplink reference signal input from demultiplexing section 3055 and outputs the result to demultiplexing section 3055 and higher layer processing section 301.

  Further, the transmission unit 307 generates a downlink reference signal according to the control signal input from the control unit 303, and encodes the HARQ indicator, downlink control information, and downlink data input from the higher layer processing unit 301. Then, PHICH, PDCCH, EPDCCH, PDSCH, and downlink reference signal are multiplexed, and the signal is transmitted to the terminal device 1 via the transmission / reception antenna unit 309.

  Also, the encoding unit 3071 encodes the HARQ indicator, downlink control information, and downlink data input from the higher layer processing unit 301 with predetermined encoding such as block encoding, convolutional encoding, and turbo encoding. Encoding is performed using the method, or encoding is performed using the encoding method determined by the radio resource control unit 3011. The modulation unit 3073 modulates the coded bits input from the coding unit 3071 with a modulation scheme determined in advance by the radio resource control unit 3011 such as BPSK, QPSK, 16QAM, and 64QAM.

  Also, the downlink reference signal generation unit 3079 obtains a sequence known by the terminal device 1 as a downlink reference signal, which is obtained by a predetermined rule based on a physical layer cell identifier (PCI) for identifying the base station device 3 or the like. Generate as The multiplexing unit 3075 multiplexes the modulated modulation symbol of each channel and the generated downlink reference signal. That is, multiplexing section 3075 arranges the modulated modulation symbol of each channel and the generated downlink reference signal in the resource element.

  Also, the wireless transmission unit 3077 generates an OFDM symbol by performing inverse fast Fourier transform (IFFT) on the multiplexed modulation symbol and the like, adds a CP to the generated OFDM symbol, and performs baseband digital A signal is generated, a baseband digital signal is converted into an analog signal, an extra frequency component is removed by a low-pass filter, up-converted to a carrier frequency, power amplified, and output to a transmission / reception antenna unit 309 To send.

  In the present embodiment, in order to describe the processing in the terminal device 1, a MAC entity in the terminal device 1, a “Multiplexing and assembly” entity (hereinafter also referred to as a first entity) in the terminal device 1, and / or The process in the HARQ entity in the terminal device 1 is described. That is, in the present embodiment, processing in the MAC entity in the terminal device 1, the first entity in the terminal device 1, and / or the HARQ entity in the terminal device 1 is described. Of course, this is a process in the apparatus 1. The upper layer processing unit 101 may perform processing of the MAC entity in the terminal device 1, the HARQ entity in the terminal device 1, and the first entity in the terminal device 1. The entity may be configured as an entity part. The HARQ entity manages at least one HARQ process.

  Further, in the present embodiment, the operation (processing) in the terminal device 1 is basically described, but the base station device 3 performs the same operation (processing) corresponding to the operation (processing) of the terminal device 1. Of course.

  Each of the terminal device 1 and the base station device 3 may include at least one processor and a memory. The at least one processor and the memory may include functions of each unit of the terminal device 1 described above or each unit of the base station device 3 described above.

  Here, transmission on PUSCH (or transmission on UL-SCH) is performed at a timing based on SFN (System Fame Number) and subframes. That is, in order to specify the timing of transmission on PUSCH, the SFN and the subframe number / index in the radio frame corresponding to the SFN are required. Here, SFN is a radio frame number / index.

  Hereinafter, for simplification of description, an SFN (radio frame) and a subframe in which transmission on the PUSCH is performed are also simply referred to as a subframe. That is, the subframe in the following description may include the meaning of SFN (radio frame) and subframe.

  Here, the base station apparatus 3 may set the semi-persistent scheduling interval (cycle) in the uplink for the terminal apparatus 1. For example, the base station apparatus 3 includes the first parameter and / or the second parameter for indicating the value of the semi-persistent scheduling interval in the uplink in the upper layer signal (RRC message). You may transmit to the terminal device 1.

  For example, the base station apparatus 3 uses the first parameter and / or the second parameter as the value of the semi-persistent scheduling interval, 10 (10 subframes), 20 (20 subframes), 32 (32 subframes), 40 (40 subframes), 64 (64 subframes), 80 (80 subframes), 128 (128 subframes), 160 (160 subframes), 320 (320 subframes), and / or Alternatively, 640 (640 subframe) may be set.

  Further, the base station apparatus 3 uses the first parameter and / or the second parameter as the value of the semi-persistent scheduling interval: 1 (1 subframe), 10 (10 subframes), 20 (20 subframes), 32 (32 subframes), 40 (40 subframes), 64 (64 subframes), 80 (80 subframes), 128 (128 subframes), 160 (160 subframes), 320 ( 320 subframes) and / or 640 (640 subframes).

  That is, the base station apparatus 3 may set 1 (one subframe) as the value of the semi-persistent scheduling interval using the first parameter and / or the second parameter.

For example, the first parameter and / or the second parameter may be set for each serving cell. Also, the first parameter may be set for the primary cell. The second parameter may be set for the primary cell and / or the secondary cell (may be set for each serving cell). The semi-persistent scheduling interval value “1 (1 subframe)” may be set for the primary cell and / or the secondary cell (may be set for each serving cell).

  Moreover, the base station apparatus 3 uses the DCI format (for example, DCI format 0) for the uplink, and uses the PUSCH resource (semi-persistent, semi-persistent, periodic) for the terminal apparatus 1 (PUSCH resource). The terminal apparatus 1 may be instructed to allocate a physical resource block) and to activate transmission on a semi-persistent PUSCH. Further, the base station apparatus 3 may instruct the terminal apparatus 1 to release semi-persistent PUSCH resources using the DCI format for the uplink.

  For example, when the CRC parity bit added to the DCI format is scrambled by the SPS C-RNTI and the NDI field included in the DCI format is set to '0', the terminal device 1 It may be verified (confirmed, checked) whether a plurality of information fields included in the DCI format are set to specific values. That is, the CRC parity bits added to the DCI format scrambled by the SPS C-RNTI and the NDI field may be used for validation for semi-persistent scheduling.

Here, if the verification is successful, the terminal apparatus 1 considers that the received DCI format indicates a valid semi-persistent activation or a valid semi-persistent release. Good (may be recognized). If the verification is not successful, the terminal device 1 may discard (clear) this DCI format.

  Here, the semi-persistent activation may include the meaning of the activation of the semi-persistent scheduling. The semi-persistent activation may include the meaning of semi-persistent allocation of PUSCH resources. The semi-persistent release may include the meaning of semi-persistent scheduling release.

  That is, the DCI format may be used to indicate activation of semi-persistent uplink scheduling. The DCI format may also be used to enable activation of semi-persistent scheduling. The DCI format may also be used to indicate semi-persistent release.

  FIG. 5 is a diagram illustrating an example of special fields (Special fields) for activation of semi-persistent scheduling according to the present embodiment. As shown in FIG. 5, a plurality of fields may be defined for the activation of semi-persistent scheduling. Further, for activation of semi-persistent scheduling, a predetermined value (which may be a specific value) set in each of a plurality of fields may be defined.

As shown in FIG. 5, for example, when a DCI format for uplink (eg, DCI format 0) is used for activation of a semi-persistent schedule, for a scheduled PUSCH included in the DCI format for uplink The TPC command information (TPC command for scheduled PUSCH) field is'
Set to 00 ', information on cyclic shift for DMRS (Cyclic shift
DMRS field is set to '000', and the most significant bit (MSB) of MCS and redundancy version field (MSB: most significant bit) is set to '0' Good.

Also, for example, when the DCI format for the downlink (eg, DCI format 1 and / or DCI format 1A) is used for the activation of the semi-persistent schedule, the HARQ process included in the DCI format for the downlink The number information field (HARQ process number) is' 000 (FDD
) ”Or“ 0000 (for TDD) ”, the most significant bit (MSB) of the field of MCS information (Modulation and Coding scheme) is set to“ 0 ”, and information about the redundancy version The (redundancy version) field may be set to '00'.

  That is, the terminal device 1 may activate the semi-persistent scheduling when each of a plurality of information fields included in the DCI format is set to a predetermined specific value. Here, it is needless to say that the plurality of information fields used for the activation of semi-persistent scheduling and the predetermined values in which the information fields are set are not limited to the above-described example. For example, a plurality of information fields used for activation of semi-persistent scheduling, and predetermined values in which the information fields are set are defined in advance according to specifications and the like, and the base station apparatus 3 and the terminal apparatus 1 may be known information.

FIG. 6 is a diagram illustrating an example of special fields (Special fields) for release of semi-persistent scheduling in the present embodiment. As shown in FIG. 6, multiple fields may be defined for the release of semi-persistent scheduling. In addition, for the release of semi-persistent scheduling, a predetermined value (which may be a specific value) set in each of a plurality of fields may be defined.

As shown in FIG. 6, for example, when the DCI format for the uplink (eg, DCI format 0) is used for the release of the semi-persistent schedule, the TPC for the scheduled PUSCH included in the DCI format for the uplink. The information on the command (TPC command for scheduled PUSCH) is set to '00', the information on cyclic shift for DMRS (Cyclic shift DMRS) is set to '000', and the information about MCS and redundancy version (Modulation) and coding scheme and redundancy version) field is set to '11111', and the resource block assignment and hopping resource allocation field De (or in all fields of the plurality of fields) may be '1' sets.

  That is, when the DCI format for the uplink is used for the release of semi-persistent scheduling, a value defined in advance for the release may be set in a field related to resource block allocation (resource allocation). .

Also, for example, when the DCI format for the downlink (for example, DCI format 1 and / or DCI format 1A) is used for the release of the semi-persistent schedule, the HARQ process number included in the DCI format for the downlink Field (HARQ process number) related information is' 000 (FD
D ”) or“ 0000 (for TDD) ”, the MCS information (Modulation and Coding scheme) field is set to“ 11111 ”, and the redundancy version field (redundancy version) field It may be set to '00', and a field of resource block assignment information (Resource block assignment) (may be all of a plurality of fields) may be set to '1'.

  That is, when the DCI format for the downlink is used for the release of semi-persistent scheduling, a value defined in advance for the release may be set in a field related to resource block allocation (resource allocation). .

  That is, the terminal device 1 may release semi-persistent scheduling when each of a plurality of information fields included in the DCI format is set to a specific value defined in advance. Here, it is needless to say that the plurality of information fields used for the release of semi-persistent scheduling and the predetermined values in which the information fields are set are not limited to the above-described example. For example, a plurality of information fields used for the release of semi-persistent scheduling and predetermined values in which the information fields are set are defined in advance according to specifications and the like, and the base station apparatus 3 and the terminal apparatus 1 May be known information.

  Here, semi-persistent scheduling may be supported only in the primary cell and the primary secondary cell. That is, the DCI format to which the CRC parity bits scrambled by the SPS C-RNTI are added may be transmitted only to the primary cell and the primary secondary cell. Further, the DCI format to which the CRC parity bits scrambled by C-RNTI are added may be transmitted to the primary cell, the primary secondary cell, and / or the secondary cell.

  For example, in the DCI format to which the CRC parity bit scrambled by SPS C-RNTI is added, “1 (1 subframe)” is set for the secondary cell as the interval value of the semi-persistent scheduling. , It may be transmitted to the secondary cell.

  Here, in order to perform transmission on the UL-SCH (transmission on the UL-SCH via the PUSCH, transmission of the UL-SCH on the PUSCH), the terminal device 1 has a valid uplink grant (a valid uplink grant ) Must have. Here, the uplink grant may include a meaning that an uplink transmission in a certain subframe is granted (granted or given).

  For example, a valid uplink grant may be dynamically received on the PDCCH. That is, a valid uplink grant may be indicated using a DCI format to which CRC parity bits scrambled by C-RNTI are added. In addition, a valid uplink grant may be set semi-permanently. That is, a valid uplink grant may be indicated using a DCI format to which CRC parity bits scrambled by SPS C-RNTI are added.

Moreover, the terminal device 1 may store the uplink grant dynamically received on the PDCCH and / or the uplink grant set semipermanently. Here, the HARQ entity passes the uplink grant dynamically received on the PDCCH and / or the semi-permanently configured uplink grant to the HARQ process, and the HARQ process receives the uplink grant received from the HARQ entity. Link grants may be stored. Hereinafter, the stored uplink grant dynamically received on the PDCCH and / or the semi-permanently configured uplink grant is referred to as a stored uplink grant.

In addition, the terminal device 1 (MAC entity), when semi-persistent activation is instructed, is configured uplink grant (a configured uplink grant)
As an alternative, the DCI format received from the base station apparatus 3 may be stored. Here, the configured uplink grant may be referred to as the configured uplink grant (SPS UL grant) or the configured grant) of the semi-persistent scheduling, or the uplink grant addressed to the SPS C-RNTI. Good. Further, the configured uplink grant may be referred to as a configured uplink grant, a configured semi-persistent scheduling uplink grant (SPS UL grant), or a configured grant.

  Here, based on the fact that the uplink grant (SPS UL grant) stored by the MAC entity has been cleared, the uplink grant (SPS UL grant) stored by the HARQ process may not be cleared. That is, even if the uplink grant (SPS UL grant) stored by the MAC entity is cleared, the retransmission for the semi-persistent PUSCH is performed based on the uplink grant (SPS UL grant) stored by the HARQ process. It is possible to continue.

Further, the uplink grant of semi-persistent scheduling includes SPS uplink grant, semi-persistent grant, semi-persistent scheduling assignment, S
It may also be referred to as an uplink grant addressed to the PS C-RNTI.

  Further, the base station apparatus 3 may set the terminal apparatus 1 to enable and / or disable semi-persistent scheduling. For example, the base station apparatus 3 may set the validity and / or the invalidity of semi-persistent scheduling using an upper layer signal (for example, an RRC layer signal).

  When semi-persistent scheduling is enabled, SPS C-RNTI, a parameter for indicating the interval value of semi-persistent scheduling in the uplink, the number of empty transmissions before release (Number of empty) A parameter for instructing transmissions before release (also referred to as a third parameter) and / or an SPS deactivation timer (also referred to as a fourth parameter) may be supplied (set) at least. . Here, empty transmission (also referred to as empty transmission) will be described later. The third parameter and the fourth parameter will be described later.

Here, for example, the terminal device 1 starts transmission on the semi-persistent PUSCH in a certain subframe, and transmits the transmission on the semi-persistent PUSCH based on the number (1). In order to recur, the configured uplink grant may be initialized or reinitialized. That is, the terminal device 1 may be regarded continuously when the set uplink grant occurs in the subframe satisfying the number (1).

すなわち、端末装置１は、ＳＰＳ上りリンクグラントを設定した後に、Ｓｕｂｆｒａｍｅ_Ｏｆｆｓｅｔ（サブフレームオフセット）の値をセットし、数（１）に基づいて特定
されるサブフレームにおいて、Ｎ番目のグラント（設定される上りリンクグラント、ＳＰＳ上りリンクグラント）が発生する（occur）とみなしてもよい（順次考慮してもよい（consider sequentially））。端末装置１（ＭＡＣエンティティ）は、数（１）を満たすサブフレームに対するＳＰＳ上りリンクグラントをＨＡＲＱエンティティに渡してもよい。

That is, after setting the SPS uplink grant, the terminal apparatus 1 sets the value of Subframe_Offset (subframe offset), and sets the Nth grant (set) in the subframe specified based on the number (1). Uplink grants and SPS uplink grants may occur (occurrence) (consider sequentially). The terminal device 1 (MAC entity) may pass the SPS uplink grant for the subframe satisfying the number (1) to the HARQ entity.

  Here, a subframe that satisfies the number (1) is also referred to as a subframe that satisfies a predetermined condition. In addition, subframes excluding the first subframe among the subframes satisfying the formula (1) are also referred to as subframes that satisfy a predetermined condition. Here, the first subframe among the subframes satisfying the number (1) may be a subframe received by DCI used for instructing activation, reactivation, or release of semi-persistent scheduling. .

  That is, after the stored DCI format is set as the SPS uplink grant, the terminal device 1 sets a subframe for transmission on the PUSCH corresponding to the Nth set uplink grant based on the number (1). You may specify. Here, in the number (1), SFN and subframe indicate an SFN and a subframe in which transmission on PUSCH is performed, respectively.

Also, in the number (1), SFN _{start_time} and subframe _{sta
rt_time} indicates the SFN and subframe at the time when the configured uplink grant is initialized or _{reinitialized} , respectively. That is, the SFN _{start_time} and the subframe _{start_time} are based on the configured uplink grant, the SFN that starts transmission on the PUSCH and the subframe (that is, initial transmission on the PUSCH corresponding to the 0th configured uplink grant) Is a subframe).

In addition, in the equation (1), semiPersistSchedIntervalUL indicates a semi-persistent scheduling interval in the uplink. In addition, in the equation (1), Subframe_Offset (subframe offset) indicates an offset value used for specifying a subframe in which transmission is performed on the PUSCH.

Here, after setting the SPS uplink grant, the terminal device 1 sets the Subframe_Offset in the number (1) to “0” if the parameter (twoIntervalConfig) is not enabled by the upper layer. May be.

  The initialization may be performed when semi-persistent scheduling is not activated. Reinitialization may also be performed when semi-persistent scheduling is already active. Here, initialization may include the meaning of initial setting, and reinitialization may include the meaning of reinitialization. That is, the terminal device 1 may start transmission on the PUSCH in a certain subframe by initializing or reinitializing the configured uplink grant.

FIG. 7 is a diagram for explaining examples of non-empty transmission and empty transmission in the present embodiment. As shown in FIG. 7, a MAC protocol data unit (MAC PDU) is composed of a MAC header (MAC header), a MAC service data unit (MAC SDU: MAC Service Data Un).
it), a MAC control element (MAC CE), and padding (padding bits). Here, the MAC protocol data unit may correspond to uplink data (UL-SCH).

Here, as a MAC control element, at least a buffer status report MAC control element (BSR MAC CE: Buffer Status Report MAC CE, a MAC control element used for a buffer status report), a timing advance command MAC control element (TAC MAC CE: Timing Advance Command MAC CE, MAC control element used to transmit timing advance command), Power Headroom Report MAC control element (PHR MAC CE: Power Headroom Report MAC CE, MAC control element used for power headroom report), and / or Alternatively, an activation / deactivation MAC control element (Activation / Deactivation MAC CE, a MAC controller used to transmit an activation / deactivation command). Roll elements), the comprising a plurality of MAC control elements may be defined.

  In addition, as the buffer status report, a plurality of buffer status reports including at least a regular BSR, a periodic BSR, and a padding BSR may be defined. For example, each of regular BSR, periodic BSR, and padding BSR may be triggered based on different events (conditions).

For example, a regular BSR can transmit data of a logical channel belonging to a certain ethical channel group (LCG: Logical Channel Group), and its transmission priority is higher than a logical channel that can be transmitted that belongs to any LCG. It may be triggered if there is no data that can be transmitted on a logical channel belonging to any LCG. The regular BSR may be triggered when a predetermined timer (retxBSR-Timer) expires and the terminal device 1 has data that can be transmitted in a logical channel belonging to a certain LCG.

The periodic BSR may be triggered when a predetermined timer (periodic BSR-Timer) expires. Padding BSR may also be triggered when UL-SCH is assigned and the number of padding bits is equal to or greater than the size of the buffer status report MAC control element and its subheader.

  The terminal device 1 may notify the base station device 3 of the uplink data transmission data buffer amount corresponding to each LCG as a message in the MAC layer using the buffer status report.

  As shown in FIG. 7, the MAC protocol data unit may include zero, one, or multiple MAC service data units. The MAC protocol data unit may also include zero, one, or multiple MAC control elements. Also, padding may be added at the end of the MAC protocol data unit (Padding may occur at the end of the MAC PDU).

  Here, the non-empty transmission may be a transmission of a MAC protocol data unit including at least one or more MAC service data units (a MAC protocol including at least one or more MAC service data units). May correspond to the transmission of data units).

  The non-empty transmission may be a transmission of a MAC protocol data unit including at least one or more first MAC control elements (including at least one or more first MAC control elements). , May support transmission of MAC protocol data units). Here, the first MAC control element (first predetermined MAC control element) is defined in advance by a specification or the like, and may be known information between the base station device 3 and the terminal device 1.

  For example, the first MAC control element may include one or all of the plurality of MAC control elements described above. For example, the first MAC control element may be a power headroom report MAC control element. Further, for example, the first MAC control element may be a buffer status report MAC control element including a regular BSR. The first MAC control element may be a buffer status report MAC control element including a periodic BSR.

  That is, a non-empty transmission may be a transmission of a MAC protocol data unit that includes one or more MAC service data units and / or one or more first MAC control elements (at least, May correspond to transmission of MAC protocol data units including one or more MAC service data units and / or one or more first MAC control elements).

  The empty transmission may be transmission of a MAC protocol data unit including only padding (corresponding to transmission of a MAC protocol data unit including only padding). Here, a MAC header is added to transmission of a MAC protocol data unit including only padding.

  Here, the empty transmission may be a transmission of a MAC protocol data unit including one or more second MAC control elements (including at least one or more second MAC control elements, May correspond to transmission of MAC protocol data units). Here, the second MAC control element (second predetermined MAC control element) is defined in advance by a specification or the like, and may be known information between the base station device 3 and the terminal device 1.

  Here, the second MAC control element may be a MAC control element other than the first MAC control element. For example, the second MAC control element may include one or all of the plurality of MAC control elements described above. For example, the second MAC control element may be a buffer status report MAC control element that includes a padding BSR.

  That is, the empty transmission may be a transmission of a MAC protocol data unit that includes only padding and / or one or more second MAC control elements (padding only and / or one or May correspond to transmission of MAC protocol data units including a plurality of second MAC control elements).

Here, non-empty transmission and / or empty transmission may be transmission corresponding to initial transmission. That is, in the initial transmission, transmitting a MAC protocol data unit including at least one or more MAC service data units and / or one or more first MAC control elements is a non-empty transmission. May be referred to. In addition, transmission of a MAC protocol data unit including only padding and / or one or more second MAC control elements in the initial transmission may be referred to as empty transmission.

  Further, non-empty transmission and / or empty transmission may be performed on the PUSCH scheduled by the base station apparatus 3. For example, non-empty transmission and / or empty transmission may be performed using a PUSCH scheduled using DCI (DCI format) with a CRC parity bit scrambled by C-RNTI (ie, dynamically scheduled PUSCH). Resource). In addition, non-empty transmission and / or empty transmission is a PUSCH scheduled using DCI (DCI format) with CRC parity bits scrambled by SPS C-RNTI (ie, semi-permanently scheduled). (PUSCH resource).

  As described above, the terminal device 1 executes transmission on the PUSCH (transmission on the UL-SCH) semi-permanently (semi-persistent and periodic) in the subframe specified based on the number (1). Also good. Here, the terminal device 1 is set based on a third parameter (a parameter for instructing the number of empty transmissions before release) set by the base station device 3. The configured grant may be cleared.

  For example, when the number of empty transmissions corresponding to the initial transmission in the continuous, semi-persistent PUSCH reaches the value (number of transmissions) indicated by using the third parameter, the terminal device 1 The set grant may be cleared.

That is, each terminal apparatus 1 is a MAC protocol data unit that does not include a MAC service data unit (that is, includes zero MAC service data unit), and corresponds to the number of consecutive new MAC protocol data units. The granted grant may be cleared immediately after the third parameter to be performed (may clear the configured grant immediately after the third parameter number of consecutive new MAC PDUs each containing zero MAC SDUs). Here, the number of consecutive empty transmissions corresponding to the initial transmission includes the number of empty transmissions in the semi-persistent scheduling resource. Here, the number of empty transmissions corresponding to successive initial transmissions does not include the number of empty transmissions on dynamically scheduled PUSCH resources.

  Here, the terminal device 1 may release (clear) uplink resources (semi-persistent scheduling resource, PUSCH resource) allocated by the base station device 3 based on the third parameter. That is, the terminal device 1 may release the uplink resource allocated by the base station device 3 based on the third parameter, similarly to clearing the set grant. Here, when receiving the DCI format used for instructing the release of the above-described semi-persistent scheduling, the terminal device 1 clears the set grant and / or releases the uplink resource. Also good.

Hereinafter, as described above, transmission of uplink data is performed by the terminal device 1, and based on the third parameter, an operation of clearing a set grant and / or releasing uplink resources is performed. This is also referred to as a first operation. Further, as described above, when the uplink data is transmitted by the terminal device 1 and the DCI format used for instructing the release of the semi-persistent scheduling is received, the set grant is cleared, and / or Alternatively, an operation in which uplink resources are released is also referred to as a first operation.

  Here, in the first operation, when the terminal apparatus 1 receives the DCI format used for instructing the release of the semi-persistent scheduling, the terminal apparatus 1 immediately clears the set grant and / or the uplink. Release link resources. That is, when receiving the DCI format used for instructing the release of semi-persistent scheduling, the terminal device 1 immediately sends the set grant without transmitting any information to the base station device 3. Clear and / or release uplink resources.

  FIG. 8 is a diagram for explaining a method of clearing a set grant in the first operation in the present embodiment. Here, FIG. 8 shows an operation when “1 (1 subframe)” is set as the interval value of the semi-persistent scheduling.

As illustrated in FIG. 8, the terminal device 1 may receive DCI used to instruct activation and / or reactivation of semi-persistent scheduling. Further, the terminal device 1 may perform non-empty transmission with a semi-persistent scheduling resource. That is, non-empty transmission based on the set uplink grant may be performed according to the above-described number (1). In addition, the terminal device 1 may perform empty transmission with a semi-persistent scheduling resource. That is, if you do not have available data for transmission,
The terminal device 1 may perform empty transmission with a semi-persistent scheduling resource.

  When there is no data available for transmission, (i) when only padding BSR is available for transmission, or (ii) only padding BSR and padding are used for transmission It may be possible. The case of having data available for transmission is (i) the case that NOT “only padding BSR is available for transmission”), (ii) ) If not “padding BSR and only padding is available for transmission” (iii) “only padding BSR is available for transmission” It may be a case where it is not “a state” or a state where (iv) only “padding BSR and padding are available for transmission”. Here, the padding BSR may be a second MAC control element.

  In 600 of FIG. 8, when the number of consecutive empty transmissions in the semi-persistent scheduling resource reaches the value (number of transmissions) set using the third parameter, the terminal device 1 You may clear the set grant. When the number of consecutive empty transmissions in the semi-persistent scheduling resource reaches the value (number of transmissions) set using the third parameter, the terminal apparatus 1 determines that the uplink resource (Semi-persistent scheduling resource) may be released. That is, the terminal device 1 may clear the set grant and / or release uplink resources based on the third parameter.

FIG. 9 is a diagram for explaining a method of transmitting uplink data according to the present embodiment. The uplink data transmission method described using FIG. 9 may be applied to base station apparatus 3 and / or terminal apparatus 1 described above. Hereinafter, the operation described with reference to FIG. 9 is also referred to as a second operation. FIG. 9 shows an operation when “1 (1 subframe)” is set as the interval value of the semi-persistent scheduling. Further, the transmission shown in FIG. 9 indicates transmission with resources of semi-persistent scheduling.

  As illustrated in FIG. 9, the base station device 3 may transmit the fourth parameter to the terminal device 1. For example, the base station apparatus 3 may transmit the fourth parameter using a higher layer signal (for example, an RRC layer signal). For example, the fourth parameter may include a parameter used to set execution of the second operation (may be a part of the operation included in the second operation). Further, the fourth parameter may include a parameter used to set a value “1 (1 subframe)” of the semi-persistent scheduling interval in the uplink.

  Further, the fourth parameter may include a parameter used for setting whether to perform empty transmission with a resource of semi-persistent scheduling (execution or non-execution).

  That is, the terminal device 1 may switch between the first operation and the second operation based on the fourth parameter (for example, the parameter in the higher layer, the parameter in the RRC layer) transmitted by the base station device 3. . For example, the terminal device 1 may execute the first operation when the fourth parameter is not set, and may execute the second operation when the fourth parameter is set.

  In subframe n, the terminal apparatus 1 receives DCI (DCI format, uplink grant) used to instruct activation and / or reactivation of semi-persistent scheduling. Here, when the terminal apparatus 1 has data available for transmission, the terminal apparatus 1 receives a subframe corresponding to a subframe that has received DCI used to instruct activation and / or reactivation of semi-persistent scheduling. Non-empty transmission may be performed in a frame (for example, a subframe four subframes after subframe n, subframe n1).

  In the subframe n1, the terminal device 1 having data that can be used for transmission may execute non-empty transmission. For example, in the subframe n1, the terminal device 1 that has data that can be used for transmission does not perform padding BSR and / or padding-only transmission.

  The subframe n2 indicates a subframe in which the terminal device 1 does not have data that can be used for transmission. Here, in subframe n2, terminal apparatus 1 that does not have data available for transmission does not execute empty transmission.

  That is, the terminal device 1 in which the fourth parameter is set does not perform empty transmission when there is no data available for transmission. As described above, the terminal device 1 for which the fourth parameter is not set performs empty transmission when there is no data available for transmission. That is, the terminal device 1 may switch whether to perform empty transmission or not to perform empty transmission when there is no data available for transmission based on the fourth parameter.

Here, in the subframe n2, when the terminal apparatus 1 performs transmission corresponding to DCI (DCI format, uplink grant) to which a CRC parity bit scrambled by C-RNTI is added, it is always non-empty. Transmission or empty transmission may be performed. That is, when a PUSCH resource is scheduled using DCI to which a CRC parity bit scrambled by C-RNTI is added, the terminal apparatus 1 always uses a non-scheduled PUSCH resource. Empty transmission or empty transmission may be performed.

  That is, resources scheduled using DCI with dynamically added CRC parity bits scrambled by C-RNTI (dynamically scheduled resources) are added with CRC parity bits scrambled by SPS C-RNTI. Resources scheduled using DCI (semi-permanently scheduled resources) may be overridden.

  Here, the scheduled PUSCH resource may be a serving cell resource including a semi-persistent scheduling resource. Further, the scheduled PUSCH resource may be a serving cell resource other than the serving cell including the semi-persistent scheduling resource. That is, the scheduled PUSCH resource may be a serving cell resource including a semi-persistent scheduling resource or a serving cell resource other than a serving cell including a semi-persistent scheduling resource.

  That is, the terminal device 1 that is set with the fourth parameter, has data that can be used for transmission, and is given an uplink grant corresponding to semi-persistent scheduling may perform non-empty transmission.

  In addition, the terminal device 1 in which the fourth parameter is set, no data is available for transmission, and an uplink grant corresponding to semi-persistent scheduling is given does not execute empty transmission.

  Further, regardless of whether or not the fourth parameter is set, the terminal device 1 having data usable for transmission and given an uplink grant corresponding to dynamic scheduling performs non-empty transmission. May be executed.

  Further, regardless of whether or not the fourth parameter is set, the terminal device 1 that does not have data available for transmission and is given an uplink grant corresponding to dynamic scheduling transmits empty transmission. May be executed.

  The subframe n3 indicates a subframe in which the terminal device 1 has data that can be used for transmission. In subframe n3, terminal device 1 having data available for transmission may execute non-empty transmission.

  In subframe n6, the terminal apparatus 1 receives DCI (DCI format, uplink grant) used for instructing the release of semi-persistent scheduling. Here, if the terminal device 1 has data available for transmission, the terminal device 1 corresponds to a subframe (for example, subframe n6) corresponding to the subframe that received DCI used to instruct the release of semi-persistent scheduling. Non-empty transmission may be executed in a subframe after four subframes, subframe n7).

Here, the terminal device 1 receives the DCI used for instructing the release of the semi-persistent scheduling, and in order to have data available for transmission, the semi-persistent scheduling is activated and / or not. Non-empty transmission may be performed on the PUSCH (PUSCH resource) scheduled by the most recent DCI used to indicate activation. That is, when the terminal device 1 has data that can be used for transmission, the terminal device 1 executes non-empty transmission with the PUSCH (PUSCH resource) scheduled by the stored grant (the configured grant). May be.

  As described above, in the DCI used for instructing the release of semi-persistent scheduling, the fields related to resource block allocation (resource allocation) have values predefined for the release of semi-persistent scheduling. It may be set. Therefore, when receiving the DCI used for instructing the release of the semi-persistent scheduling, the terminal device 1 may execute non-empty transmission based on the configured grant. .

That is, when receiving the DCI used for instructing the release of semi-persistent scheduling, the terminal device 1 may execute non-empty transmission based on the configured grant. . That is, when receiving the DCI used for instructing the release of semi-persistent scheduling, the terminal apparatus 1 uses the PUSCH (PUSCH resource) before releasing the PUSCH (PUSCH resource). Non-empty transmission may be executed. Here, the PUSCH (PUSCH resource) is scheduled by the most recent DCI used to indicate activation and / or deactivation of semi-persistent scheduling. That is, the PUSCH (PUSCH resource) is scheduled by a configured grant. Here, the most recent DCI is also referred to as the last received DCI.

  That is, in subframe n7, terminal device 1 having data available for transmission may execute non-empty transmission based on a configured grant. That is, for example, in the subframe n7, the terminal device 1 having data that can be used for transmission does not perform the padding BSR and / or the padding-only transmission.

  In addition, the terminal device 1 may clear a set grant and / or release uplink resources in a subframe in which non-empty transmission is performed or in a subframe after the subframe. That is, when the terminal device 1 in which the fourth parameter is set receives DCI used to instruct the release of semi-persistent scheduling, the terminal device 1 performs non-empty transmission or empty transmission, and performs non-empty transmission or empty transmission. In a subframe in which transmission is performed or in a subframe subsequent to the subframe, a grant to be set may be cleared and / or uplink resources may be released.

  Further, the terminal device 1 clears a grant that is set in a subframe that receives DCI used for instructing the release of semi-persistent scheduling, or a subframe after the subframe, and / or Uplink resources may be released. That is, when the terminal device 1 in which the fourth parameter is set receives the DCI used for instructing the release of the semi-persistent scheduling, after passing the set grant to the HARQ entity, In a subframe that receives DCI used for instructing the release of scheduling, or in a subframe subsequent to the subframe, clear a set grant and / or release uplink resources. Also good.

As described above, when the terminal device 1 in which the fourth parameter is not set receives DCI used to instruct the release of semi-persistent scheduling,
Without transmitting any information to the base station apparatus 3, the set grant is cleared and / or the uplink resource is released. That is, when receiving the DCI used for instructing the release of semi-persistent scheduling based on the fourth parameter, the terminal device 1 performs non-empty transmission, and then sets the grant to be set. Whether to clear and / or release uplink resources, clear a set grant without transmitting any information to the base station apparatus 3, and / or release uplink resources You may switch.

  As described above, the terminal device 1 that does not have data available for transmission does not perform empty transmission. If only the second MAC control element is available for transmission, the terminal device 1 does not perform empty transmission. If only the second MAC control element and / or padding is available for transmission, the terminal device 1 does not perform empty transmission.

  More specifically, not performing empty transmission may be defined as an operation (processing) in the HARQ entity in the terminal device 1. That is, performing non-empty transmission, not performing non-empty transmission, performing empty transmission, and / or not performing empty transmission may be defined as an operation (processing) in the HARQ entity. .

For example, determining whether to obtain a MAC protocol data unit for transmission (the MAC PDU to transmit) from the first entity based on whether the HARQ entity has data available for transmission It may be prescribed to do. HAR
If the Q entity has data available for transmission, it may obtain a MAC protocol data unit for transmission (the MAC PDU to transmit) from the first entity. For example, if the fourth parameter is set and the uplink grant is addressed to the SPS C-RNTI and has data available for transmission, the HARQ entity will send a MAC protocol data unit from the first entity. It may be specified to obtain. Here, the MAC protocol data unit may include one or more first MAC control elements and / or one or more MAC service data units.

When the MAC protocol data unit is acquired, the HARQ entity passes the MAC protocol data unit and the set grant to the HARQ process, and instructs the HARQ process to trigger initial transmission. The HARQ process stores the configured grant and the stored uplink grant
The generation of transmission according to the physical layer may be instructed to the physical layer.

If the HARQ entity has no data available for transmission, it may not obtain a MAC protocol data unit for transmission (the MAC PDU to transmit) from the first entity. For example, if the fourth parameter is set and the uplink grant is addressed to the SPS C-RNTI and does not have data available for transmission, the HARQ entity will receive a MAC protocol data unit from the first entity. It may be prescribed not to acquire If the MAC protocol data unit is not obtained, the HARQ entity does not pass the MAC protocol data unit and the configured grant to the HARQ process and does not instruct the HARQ process to trigger initial transmission.

The first entity may provide a MAC protocol data unit for transmission. In the first entity, a Logical Channel Prioritization procedure may be applied when a new transmission is performed. In the first entity, multiplexing of the MAC control element and the MAC service data unit may be performed.

  For example, if the empty transmission is not performed, the first entity may not generate a MAC protocol data unit corresponding to the empty transmission. Further, when the empty transmission is not executed, the first entity may not pass the MAC protocol data unit corresponding to the empty transmission to the HARQ entity.

  If an empty transmission is not performed, the HARQ entity may not pass the MAC protocol data unit corresponding to the empty transmission to the HARQ process. Further, when the empty transmission is not executed, the HARQ process does not need to pass the MAC protocol data unit corresponding to the empty transmission to the physical layer.

  Also, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, then one or more MAC entities It may be specified to transmit a MAC protocol data unit including the first MAC control element.

  That is, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, then one or more MAC entities May be defined to transmit a MAC protocol data unit that includes a plurality of MAC service data units and / or one or more first MAC control elements.

  Also, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, the MAC entity includes only padding It may be specified that the MAC protocol data unit is not transmitted.

  Also, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, then one or more MAC entities It may be specified not to transmit a MAC protocol data unit including the second MAC control element.

  That is, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, then the MAC entity is only padded, and / Or it may be specified not to transmit a MAC protocol data unit that includes one or more second MAC control elements.

  For example, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, the MAC entity may include one or more It may be specified to transmit a MAC protocol data unit including a plurality of MAC service data units.

Also, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, then one or more MAC entities It may be specified to transmit a MAC protocol data unit including the first MAC control element.

  That is, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, then one or more MAC entities May be defined to transmit a MAC protocol data unit that includes a plurality of MAC service data units and / or one or more first MAC control elements.

  Also, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, the MAC entity includes only padding It may be specified that the MAC protocol data unit is not transmitted.

  Also, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, then one or more MAC entities It may be specified not to transmit a MAC protocol data unit including the second MAC control element.

  That is, if the fourth parameter is set, has data available for transmission, and the MAC entity is given an uplink grant corresponding to semi-persistent scheduling, then the MAC entity is only padded, and / Or it may be specified not to transmit a MAC protocol data unit that includes one or more second MAC control elements.

  Hereinafter, NDI included in the DCI format (uplink grant) will be described.

  The base station apparatus 3 may instruct the terminal apparatus 1 to perform initial transmission or adaptive retransmission using the NDI included in the uplink grant to be transmitted.

  The HARQ entity and the HARQ process store the value of NDI included in the uplink grant addressed to C-RNTI.

  The HARQ entity is configured such that the received uplink grant is addressed to the C-RNTI, and the NDI included in the received uplink grant is the NDI in the transmission prior to the HARQ process to which the received uplink grant corresponds. If it is toggled relative to the value, it obtains the MAC protocol data unit from the first entity, passes the MAC protocol data unit and the received uplink grant to the HARQ process and initializes to the HARQ process. Instruct the transmission trigger.

The HARQ entity is configured such that the received uplink grant is addressed to the C-RNTI, and the NDI included in the received uplink grant is the NDI in the transmission prior to the HARQ process to which the received uplink grant corresponds. If it is not toggled compared to the value, the received uplink grant is passed to the HARQ process, which instructs the HARQ process to generate adaptive retransmissions.

If the DCI (Uplink Grant) used to indicate the activation and / or reactivation of semi-persistent scheduling is received using the PDCCH, the MAC entity and the HARQ entity have NDI for the HARQ process. You may consider it to be toggled. That is, if the DCI (uplink grant) used to indicate activation and / or reactivation of semi-persistent scheduling is received using PDCCH, the MAC entity may toggle the NDI for the HARQ process. Regardless, the grant set for the HARQ entity may be passed.

  If the Nth grant (uplink grant configured, SPS uplink grant) is considered to occur in the subframe identified based on the number (1), the NDI for the HARQ process is considered to be toggled, and the HARQ entity You may pass a grant set to.

  FIG. 10 is a diagram illustrating a first example for explaining the NDI in the present embodiment. FIG. 11 is a diagram illustrating a second example for explaining the NDI in the present embodiment. FIG. 12 is a diagram illustrating a third example for describing the NDI in the present embodiment.

  In the subframe n of FIGS. 10 to 12, the terminal device 1 receives the uplink grant 800 for the HARQ process A. Uplink grant 800 is addressed to C-RNTI. The value of the NDI field included in the uplink grant 800 is 0. The MAC entity passes the uplink grant 800 to the HARQ entity. The HARQ entity stores the value (0) of the NDI field included in the uplink grant 800. The HARQ entity obtains the MAC protocol data unit from the first entity, passes the MAC protocol data unit and the uplink grant 800 to the HARQ process A, and instructs the HARQ process A to trigger initial transmission. The HARQ process A (i) stores the MAC protocol data unit and the uplink grant 800, and (ii) generates a MAC protocol data unit transmission 801 according to the stored uplink grant 800 in the physical layer. Instruct. 10 to 12, the physical layer performs initial transmission 801 of the MAC protocol data unit according to the stored uplink grant 800. HARQ process A is also referred to as a first HARQ process.

  In the subframe n2 of FIG. 10, the terminal device 1 receives an ACK for the HARQ process A (MAC protocol data unit). The HARQ entity passes an ACK to HARQ process A. HARQ process A sets ACK to the state variable. Here, the HARQ process A holds the MAC protocol data unit to be stored. Here, the HARQ process A does not instruct the physical layer to generate the transmission of the MAC protocol data unit according to the stored uplink grant 800. That is, the MAC protocol data unit is not transmitted in the subframe n3 of FIG.

In subframe n4 in FIG. 10, terminal apparatus 1 receives uplink grant 803 for HARQ process A. Uplink grant 803 is addressed to C-RNTI. The value of the NDI field included in the uplink grant 803 is 0. The MAC entity passes the uplink grant 803 to the HARQ entity. The HARQ entity sends the uplink grant 803 to the HARQ process A based on the fact that the NDI value (0) included in the uplink grant 803 is not toggled compared to the stored NDI value (0). Instructs HARQ process A to generate adaptive retransmissions. The HARQ process A instructs the physical layer to (i) store the uplink grant 803 and (ii) generate a retransmission 804 of the MAC protocol data unit in response to the stored uplink grant 803. In subframe n5 of FIG.
The physical layer performs adaptive retransmission 804 of the MAC protocol data unit according to the stored uplink grant 803.

  In this way, the base station apparatus 3 can pending retransmission of the MAC protocol data unit by transmitting only ACK in the subframe n3 of FIG. Further, the base station apparatus 3 transmits the uplink grant 803 including the NDI having the same value as the NDI value included in the uplink grant 800 in the subframe n4, thereby causing the terminal apparatus 1 to transmit the MAC protocol data unit. Can be resumed.

  In the subframe n2 of FIG. 11, the terminal apparatus 1 receives the ACK for the HARQ process A and the uplink grant 802A for the HARQ process A. Uplink grant 802A is addressed to SPS C-RNTI. The value of the NDI field included in the uplink grant 802A is 0. Uplink grant 802A is used to activate the semi-persistent schedule. The MAC entity stores the uplink grant 802A, considers that the NDI for HARQ process A is toggled, and passes the stored uplink grant 802A to the HARQ entity. HARQ process A sets ACK to the state variable.

  If the fourth parameter is set and the uplink grant 802A is addressed to the SPS C-RNTI and has data available for transmission, the HARQ entity obtains a MAC protocol data unit from the first entity. The MAC protocol data unit and the uplink grant 802A are passed to the HARQ process A, and the HARQ process A is instructed to trigger initial transmission. HARQ process A (i) stores the MAC protocol data unit and the uplink grant 802A, and (ii) generates a MAC protocol data unit transmission 801 in response to the stored uplink grant 802A. Instruct. In the subframe n3 in FIG. 11, the physical layer performs initial transmission 802B of the MAC protocol data unit according to the stored uplink grant 802A.

  In the subframe n4 of FIG. 11, the terminal device 1 receives the uplink grant 803 for the HARQ process A. Uplink grant 803 is addressed to C-RNTI. The value of the NDI field included in the uplink grant 803 is 0. The MAC entity passes the uplink grant 803 to the HARQ entity. In the MAC entity, (i) the uplink grant 803 supports C-RNTI, and (ii) the uplink grant 802A immediately before being passed to the HARQ process A is received for the SPS C-RNTI. Based on the fact that it is a link grant, regardless of the value of the NDI included in the uplink grant 803, the NDI for the HARQ process A is considered to be toggled. The HARQ entity obtains the MAC protocol data unit from the first entity based on the fact that the NDI for the HARQ process A is toggled regardless of the value of the NDI included in the uplink grant 803, and the MAC protocol data unit And the uplink grant 803 is passed to the HARQ process A, and the HARQ process A is instructed to trigger initial transmission. HARQ process A (i) stores the MAC protocol data unit and uplink grant 803 and (ii) generates a MAC protocol data unit transmission 804 in response to the stored uplink grant 803 to the physical layer. Instruct. In the subframe n5 of FIG. 11, the physical layer performs the initial transmission 804 of the MAC protocol data unit according to the stored uplink grant 803.

In the subframe n2 of FIG. 12, the terminal device 1 determines that the AC for the HARQ process A
K and uplink grant 802A for HARQ process A is received. Uplink grant 802A is addressed to SPS C-RNTI. The value of the NDI field included in the uplink grant 802A is 0. Uplink grant 802A is used to activate the semi-persistent schedule. The MAC entity stores the uplink grant 802A, considers that the NDI for HARQ process A is toggled, and passes the stored uplink grant 802A to the HARQ entity. HARQ process A sets ACK to the state variable.

  If the fourth parameter is set and the uplink grant 802A is addressed to the SPS C-RNTI and has no data available for transmission, the HARQ entity obtains the MAC protocol data unit from the first entity. Without passing the MAC protocol data unit and the uplink grant 802A to the HARQ process A, the HARQ process A is not instructed to trigger the initial transmission. The HARQ process A does not instruct the physical layer to generate (i) a MAC protocol data unit and (ii) generate a MAC protocol data unit transmission 802B according to the stored uplink grant 800. In the subframe n3 of FIG. 12, the physical layer does not execute the transmission 802B of the MAC protocol data unit according to the stored uplink grant 800.

  In the subframe n4 of FIG. 12, the terminal device 1 receives the uplink grant 803 for the HARQ process A. Uplink grant 803 is addressed to C-RNTI. The value of the NDI field included in the uplink grant 803 is 0. The MAC entity passes the uplink grant 803 to the HARQ entity.

  In the subframe n4 of FIG. 12, the uplink grant immediately before being passed to the HARQ process A is the uplink grant 800. In the MAC entity, (i) the uplink grant 803 supports C-RNTI, and (ii) the uplink grant 800 immediately before being passed to the HARQ process A is received for the SPS C-RNTI. Based on the fact that it is not a link grant, regardless of the value of the NDI included in the uplink grant 803, the NDI for the HARQ process A is not considered to be toggled. The HARQ entity is based on the fact that the NDI contained in the uplink grant 803 is not toggled when the NDI value (0) contained in the uplink grant 803 is compared to the stored NDI value (0). Then, the uplink grant 803 is passed to the HARQ process A, and the HARQ process A is instructed to generate adaptive retransmission. The HARQ process A instructs the physical layer to (i) store the uplink grant 803 and (ii) generate a retransmission 804 of the MAC protocol data unit in response to the stored uplink grant 803. In subframe n5 of FIG. 12, the physical layer performs an adaptive retransmission 804 of the MAC protocol data unit according to the stored uplink grant 803.

  The MAC entity and the HARQ entity are included in the uplink grant 803 when the previous uplink grant passed from the HARQ entity to the HARQ process A is not the uplink grant received for the SPS C-RNTI. Regardless of the value of NDI, the NDI for HARQ process A may not be considered to be toggled.

  The MAC entity and the HARQ entity are included in the uplink grant 803 when the previous uplink grant passed from the HARQ entity to the HARQ process A is an uplink grant received for the SPS C-RNTI. Regardless of the value of NDI, the NDI for HARQ process A may be considered to be toggled.

  If the fourth parameter is not set, the HARQ entity may pass the uplink grant 802A to HARQ process A regardless of whether it has data available for transmission. If the fourth parameter is set and the uplink grant 802A is addressed to the C-RNTI, the HARQ entity makes the uplink grant 802A a HARQ process A regardless of whether it has data available for transmission. May be passed to

  If the fourth parameter is set and the uplink grant 802A is addressed to the SPS C-RNTI, the HARQ entity will go from the HARQ entity to the HARQ process A based on whether it has data available for transmission. It may be determined whether uplink grant 802A is passed.

  If the fourth parameter is set and the uplink grant 802A is addressed to the SPS C-RNTI and has data available for transmission, the HARQ entity may pass the uplink grant 802A to the HARQ process A .

  If the fourth parameter is set and the uplink grant 802A is addressed to the SPS C-RNTI and has no data available for transmission, the HARQ entity must not pass the uplink grant 802A to the HARQ process A. Also good.

  The MAC entity does not depend on whether the fourth parameter is set, whether the uplink grant 802A is addressed to the SPS C-RNTI, and whether it has data available for transmission. Pass uplink grant 802A for process A to the HARQ entity.

  Also, the MAC entity and the HARQ entity may be the HARQ entity when the previous uplink grant for the HARQ process A passed from the MAC entity to the HARQ entity is an uplink grant received for the SPS C-RNTI. Regardless of whether or not the previous uplink grant is passed from HARQ to HARQ process A and the value of NDI included in uplink grant 803, it may be considered that the NDI for HARQ process A has been toggled.

  In FIG. 12, the MAC entity and the HARQ entity are uplink grants in which the uplink grant immediately before the HARQ process A passed from the MAC entity to the HARQ entity is received for the SPS C-RNTI. If the previous uplink grant is not passed from the HARQ entity to the HARQ process A, the MAC protocol data unit corresponding to the HARQ process A is stored and included in the uplink grant 803 addressed to the C-RNTI The MAC protocol data unit is obtained from the first entity, even if the NDI value to be received is not toggled when compared to the NDI value in the previous transmission of HARQ process A. Data units, and passes the uplink grant 803 to the HARQ process A, may instruct the trigger of the initial transmission in HARQ process A.

  In this embodiment, “uplink grant 802A” in FIG. 11 and FIG. 12 may be replaced with “set grant” or “uplink grant 802A or set grant”.

FIG. 13 is a diagram for explaining a method of transmitting uplink data according to the present embodiment. The uplink data transmission method described using FIG. 13 may be applied to base station apparatus 3 and / or terminal apparatus 1 described above.

FIG. 13 shows an operation when the subframe bundling operation is set for the terminal device 1 that executes the second operation. Here, the base station apparatus 3 may set the subframe bundling operation using a parameter (also referred to as ttiBundling) in the higher layer. For example, if the use of subframe bundling is configured using parameters in higher layers, the subframe bundling operation may be applied to PUSCH (UL-SCH). For example, when the use of subframe bundling is configured using parameters in higher layers, the subframe bundling operation may be applied to PDSCH (DL-SCH). For example, when the use of subframe bundling is configured using parameters in higher layers, the subframe bundling operation is applied to both PDSCH (DL-SCH) and PUSCH (UL-SCH). May be.

  Hereinafter, the subframe bundling operation for the PUSCH will be described in detail. However, the present embodiment may be applied to the PDSCH.

When the use of subframe bundling is configured, four consecutive uplink subframes (four consecutive) are transmitted for UL-SCH transmission (uplink data transmission).
uplink subframes) may be used. Here, four consecutive uplink subframes may be referred to as a bundle. Note that the number of consecutive uplink subframes included in one bundle may be given based on information received from the base station apparatus 3.

  The transmission in each of the four consecutive uplink subframes corresponds to the same HARQ process and the same transport block (MAC protocol data unit). As illustrated in FIG. 13, for example, the terminal device 1 for which the subframe bundling operation is set may perform initial PUSCH transmission in the subframe n11. Further, PUSCH non-adaptive retransmission may be performed in subframe n12, subframe n13, and subframe n14. Within one bundle, non-adaptive retransmissions of PUSCH in subframe n12, subframe n13, and subframe n14 are triggered without waiting for feedback (uplink grant and HARQ feedback) for previous transmissions. . Here, the subframe n11, the subframe n12, the subframe n13, and the subframe n14 indicate four consecutive uplink subframes.

Hereinafter, the redundancy version rv _idx ε {0, 1, 2, 3} in the present embodiment will be described.

  The redundancy version for the PUSCH is given based on information on the MCS and / or redundancy version (Modulation and coding scheme and / or redundancy version) included in the uplink grant. The redundancy version for the PDSCH is given based on information on the redundancy version (Modulation and coding scheme and / or redundancy version) included in the downlink assignment.

  The redundancy version is used for encoding transport blocks (codewords). Transport blocks are mapped to codewords. A code word is a unit of encoding.

  Hereinafter, encoding of the transport block (code word) will be described.

  FIG. 14 is a diagram illustrating an example of codeword (transport block) encoding processing according to the present embodiment. The process of FIG. 14 may be applied to each of the transport blocks. The process of FIG. 14 may be applied to each transmission within one bundle. One transport block is mapped to one codeword. That is, encoding a transport block is the same as encoding a codeword.

  (Step 1410) After adding a corresponding CRC parity bit to one codeword, the codeword is divided into one or a plurality of code blocks. A corresponding CRC parity bit may be added to each code block. (Step 1411) Each of the one or more code blocks is encoded (for example, turbo encoding, convolutional encoding, or LDPC (Low Density Parity Check) encoding).

(Step 1412) Rate matching is applied to each coded bit sequence of the code block. The rate matching is the redundant version rv _idx
Depending on

  (Step 1413) A sequence of coded bits of a codeword is obtained by concatenating one or more code blocks to which rate matching has been applied.

  FIG. 15 is a diagram illustrating an example of rate matching in the present embodiment. The rate matching is executed in step 1412 of FIG. That is, rate matching is applied to the code block of the transport block.

One rate matching (step 1412) includes three interleaving (step 1412a), one bit collection (step 1412b), and one bit selection and pruning (step 1412c). In one rate matching (step 1412), three information bit streams (d ′ _k , d ″ _k , d ′ ″ _k ) are input from channel coding (step 1411). In step 1412a, each of the three information bitstreams (d ′ _k , d ″ _k , d ′ ″ _k ) is interleaved according to the sub-block interleaver. By interleaving each of the three information bitstreams (d ′ _k , d ″ _k , d ′ ″ _k ), three output sequences (v
' _k , v'' _k , v''' _k ).

The number of sub-block interleaver columns C _subblock is 32. The number of rows of the sub-floc interleaver R _subblock is the smallest integer that satisfies the following inequality (2).
Here, D is the number of each bit of the information bit stream (d ′ _k , d ″ _k , d ′ ″ _k ).

該サブブロックインタリーバーの出力系列（v’_k、v’’_k、v’’’_k）のそれぞれのビットの数K_Πは、以下の数式（３）によって与えられる。

The number K _の of each bit of the output sequence (v ′ _k , v ″ _k , v ′ ″ _k ) of the sub-block interleaver is given by the following equation (3).

ステップ１４１２ｂにおいて、３つの出力系列（v’_k、v’’_k、v’’’_k）から、w_k（virtual circular buffer）が得られる。w_kは、以下の数式（４）によって与えられる。w_kのビットの数Kwは、K_Πの３倍である。

In step 1412b, w _k (virtual circular buffer) is obtained from the three output sequences (v ′ _k , v ″ _k , v ′ ″ _k ). w _k is given by the following equation (4). The number Kw of bits of w _k is three times K _Π .

ステップ１４１２ｃ（ビット選択および除去）において、w_kからレートマッチング出力ビット系列e_kが得られる。レートマッチング出力ビット系列e_kのビットの数はEである。
図１６は、本実施形態のビット選択および除去の一例を示す図である。図１６のrv_idxは
、対応するトランスポートブロックの送信に対するＲＶ（redundancy version）番号である。図１６のN_cbは、対応するコードブロックのためのソフトバッファサイズであり、ビ
ットの数によって表現される。N_cbは以下の数式（５）によって与えられる。

In step 1412c (bit selection and removal), a rate matching output bit sequence e _k is obtained from w _k . The number of bits of the rate matching output bit sequence e _k is E.
FIG. 16 is a diagram illustrating an example of bit selection and removal according to the present embodiment. Rv _{idx in} FIG. 16 is an RV (redundancy version) number for transmission of the corresponding transport block. N _{cb in} FIG. 16 is a soft buffer size for the corresponding code block, and is expressed by the number of bits. N _cb is given by the following equation (5).

ここで、Cは、図１４のコードブロックセグメンテーション（ステップ１４１０）にお
いて、１つのトランスポートブロックが分割されるコードブロックの数である。ここで、N_IRは、対応するトランスポートブロックのためのソフトバッファサイズであり、ビット
の数によって表現される。N_IRは、以下の数式（６）によって与えられる。

Here, C is the number of code blocks into which one transport block is divided in the code block segmentation (step 1410) of FIG. Here, N _IR is the soft buffer size for the corresponding transport block, and is represented by the number of bits. N _IR is given by the following equation (6).

ここで、端末装置１が、送信モード３、４、８、９、または１０に基づいてＰＤＳＣＨ送信を受信するよう設定されている場合、K_MIMOは２であり、且つ、それ以外の場合、K_MIMOは１である。K_MIMOは、端末装置１が設定されている送信モードに基づいて受信される
１つのＰＤＳＣＨ送信が含むことができるトランスポートブロックの最大数と同じである。

Here, if the terminal device 1 is set to receive PDSCH transmission based on the transmission mode 3, 4, 8, 9, or 10, K _MIMO is 2, and otherwise, K _MIMO is 1. K _MIMO is the same as the maximum number of transport blocks that can be included in one PDSCH transmission received based on the transmission mode in which the terminal apparatus 1 is set.

Here, M _{DL_HARQ} is the maximum number of downlink HARQ processes managed in parallel in one corresponding serving cell. For the FDD serving cell, M _{DL_HARQ} may be 8. For a TDD serving cell, M _{DL_HARQ} may correspond to an uplink-downlink configuration. Here, M _limit is 8.

Here, K _c is any one of {1, 3/2, 2, 3, and 5}. Description of a method of setting K _c is omitted.

Here, N _soft is the total number of soft channel bits corresponding to the UE category or the downlink UE category. N _soft is given by any one of the ability parameter ue-Category (without suffix), the ability parameter ue-Category-v1020, the ability parameter ue-Category-v1170, and the ability parameter ue-CategoryDL-r12.

That is, the redundant version rv _idx is a parameter used for rate matching and a parameter used for bit selection and removal.

The redundancy version rv _idx for the first PUSCH transmission in the bundle is given based on information about the MCS and / or redundancy version included in the uplink grant (Modulation and coding scheme and / or redundancy version).

The redundancy version rv _idx for the first PDSCH transmission in the bundle is given based on the information about the redundancy version (Modulation and coding scheme and / or redundancy version) included in the downlink assignment.

The _redundant version rv _idx for each of the transmissions in the bundle, excluding the first transmission, may be given based on the first determination method, the second determination method, and the third determination method. . One of the first determination method, the second determination method, and the third determination method is selected based on at least part or all of the following elements (A) to (I): Also good. The determination method for the downlink (PDSCH) may be different from the determination method for the uplink.
Element (A): In the case of PUSCH transmission, the RNTI corresponding to the uplink grant corresponding to the bundle
Element (B): In the case of PDSCH transmission, RNTI corresponding to the downlink assignment corresponding to the bundle
■ Element (C): In the case of PUSCH transmission, the value of the field in the uplink grant corresponding to the bundle ■ Element (D): In the case of PDSCH transmission, the value of the field in the downlink assignment corresponding to the bundle ■ Element ( E): Parameter indicated by upper layer signal (RRC message) Element (F): Whether or not the fourth parameter is set Element (G): Bundle or each transmission in the bundle is transmitted ■ Element (H): Frequency, component carrier, or cell at which each of the bundles or transmissions in the bundle is transmitted Element (I): Is bundle transmission dynamically scheduled? For example, the uplink grant corresponding to the bundle A corresponding RNTI is C-RNTI, when the fourth parameter is set, the first determination method may be selected. For example, when the RNTI corresponding to the uplink grant corresponding to the bundle is SPS C-RNTI and the fourth parameter is not set, the first determination method may be selected. For example, when the RNTI corresponding to the uplink grant corresponding to the bundle is SPS C-RNTI and the fourth parameter is set, the second determination method may be selected.

FIG. 17 is a diagram for describing a first determination method of the redundancy version for each of the transmissions in the bundle according to the present embodiment. In FIG. 17, the terminal device 1 for which the subframe bundling operation is set may perform initial PUSCH transmission in the subframe n21. In addition, the terminal device 1 for which the subframe bundling operation is set may perform non-adaptive retransmission of PUSCH in the subframe n22, the subframe n23, and the subframe n24. The terminal device 1 performs PUSCH initial transmission related to the redundancy version 2 in the subframe n21. The redundancy version 2 is given based on information on the MCS and / or redundancy version (Modulation and coding scheme and / or redundancy version) included in the uplink grant.

  The terminal device 1 performs PUSCH non-adaptive retransmission related to the redundancy version 3 in the subframe n22. The terminal device 1 performs PUSCH non-adaptive retransmission related to the redundancy version 1 in the subframe n23. The terminal device 1 performs PUSCH non-adaptive retransmission related to the redundancy version 0 in the subframe n24. That is, the terminal apparatus 1 may perform PUSCH non-adaptive retransmission while incrementing the redundancy version corresponding to the previous PUSCH transmission in the bundle in each of the subframe n22, the subframe n23, and the subframe n24. Good. The redundancy version is incremented in the order of 0, 2, 3, 1. Next to redundancy version 1 is redundancy version 0.

  FIG. 18 is a diagram for describing a second determination method of the redundancy version for each of the transmissions in the bundle according to the present embodiment. In FIG. 18, the terminal apparatus 1 for which the subframe bundling operation is set may perform initial PUSCH transmission in the subframe n31. Also, the terminal device 1 for which the subframe bundling operation is set may perform non-adaptive retransmission of PUSCH in the subframe n32, the subframe n33, and the subframe n34. The terminal device 1 performs PUSCH initial transmission related to the redundancy version 2 in the subframe n31. The redundancy version 2 is given based on information on the MCS and / or redundancy version (Modulation and coding scheme and / or redundancy version) included in the uplink grant.

  The terminal device 1 performs PUSCH non-adaptive retransmission related to the redundancy version 2 in the subframe n32, the subframe n33, and the subframe n34. That is, the terminal device 1 performs PUSCH non-adaptive retransmission corresponding to the same redundancy version as the redundancy version corresponding to the first PUSCH transmission in the bundle in each of the subframe n32, the subframe n33, and the subframe n34. May be.

  FIG. 19 is a diagram for explaining a third determination method of the redundancy version for each of the transmissions in the bundle according to the present embodiment. In FIG. 19, the terminal apparatus 1 for which the subframe bundling operation is set may perform initial PUSCH transmission in the subframe n41. In addition, the terminal device 1 for which the subframe bundling operation is set may perform non-adaptive retransmission of PUSCH in the subframe n42, the subframe n43, and the subframe n44. The terminal device 1 performs PUSCH initial transmission related to the redundancy version 2 in the subframe n41. The redundancy version 2 is given based on information on the MCS and / or redundancy version (Modulation and coding scheme and / or redundancy version) included in the uplink grant.

The terminal device 1 performs PUSCH non-adaptive retransmission related to the redundancy version 2 in the subframe n42. That is, the terminal device 1 may perform PUSCH non-adaptive retransmission corresponding to the same redundancy version as the redundancy version corresponding to the first PUSCH transmission in the bundle in the subframe n42.

The terminal device 1 performs PUSCH non-adaptive retransmission related to the redundancy version 3 in the subframe n43 and the subframe n44. That is, the terminal device 1 performs PUSCH non-adaptive retransmission related to the redundancy version 3 in the subframe n43 and the subframe n44. That is, the terminal device 1 transmits information (Modulation) on the MCS and / or the redundancy version included in the uplink grant in the subframe n43 and the subframe n44.
and PUSCH non-adaptive retransmissions corresponding to the given redundancy version are performed by incrementing the given redundancy version based on the coding scheme and / or redundancy version).

  A pair of the subframe n41 and the subframe n42 is also referred to as a block A. A pair of the subframe n43 and the subframe n44 is also referred to as a block B. That is, the redundancy version 3 for the block B including the subframe n43 and the subframe n44 is given by incrementing the redundancy version 2 in the block A including the subframe n41 and the subframe n42.

  As described above, the operations described above with reference to the drawings may be limited as operations performed in only one serving cell (for example, only the primary cell). For example, the operations described above may be applied only when an operation corresponding to semi-persistent scheduling and an operation corresponding to dynamic scheduling are performed in only one serving cell. That is, for example, an operation corresponding to semi-persistent scheduling is performed in a serving cell (for example, a primary cell), and an operation corresponding to dynamic scheduling is performed in a serving cell (for example, a secondary cell) different from the certain serving cell. If performed, the operations described above may not be applied.

  Further, the operation described above may be an operation performed across a plurality of serving cells (for example, a primary cell and a secondary cell). For example, an operation corresponding to semi-persistent scheduling is performed in a serving cell (for example, a primary cell), and an operation corresponding to dynamic scheduling is performed in a serving cell (for example, a secondary cell) different from the certain serving cell. Even in such a case, the operations described above may be applied.

  Hereinafter, various aspects of the terminal device 1 and the base station device 3 in the present embodiment will be described.

(1) A first aspect of the present embodiment is a terminal device 1, which includes at least one processor and a memory, and the at least one processor performs (a) HARQ process (Hybrid Automatic Repeat Request). A corresponding first uplink grant reception process is performed, (b) a MAC (Medium Access Control) entity process is performed, and the MAC entity includes (a) a HARQ entity that manages the HARQ process; (B) passing the first uplink grant to the HARQ entity, wherein the HARQ entity: (a) the first uplink grant is a C-RNTI (Cell
If the first NDI associated with the first uplink grant is toggled compared to the second NDI in the transmission immediately prior to the HARQ process, the first NDI associated with the first uplink grant is The uplink grant of the HARQ
(B) the fourth parameter is set, and the first uplink grant is SPS C-RNTI (Semi Persistent Scheduling Cell Radio Network Temporary If only the padding BSR (Buffer Status Report) is not ready for transmission, the first uplink grant is passed to the HARQ process and the HARQ process is instructed to trigger initial transmission. (C) the fourth parameter is set, the first uplink grant is addressed to the SPS C-RNTI, and only the padding BSR (Buffer Status Report) can be transmitted. If there is, do not pass the first uplink grant to the HARQ process; Without instructing the process to trigger an initial transmission, the first uplink grant corresponds to the C-RNTI, and the second uplink grant before passed to the HARQ process is the SPS C -If the uplink grant received for the RNTI or the configured uplink grant, the first NDI for the HARQ process is toggled regardless of the value of the first NDI. It is regarded.

  (2) In the first aspect of this embodiment, the HARQ entity includes: (a) the first uplink grant is addressed to the C-RNTI, and the HARQ entity is associated with the first uplink grant. If the first NDI is not toggled compared to the second NDI in the transmission immediately prior to the HARQ process, it passes the first uplink grant to the HARQ process and generates an adaptive retransmission to the HARQ process (B) If the fourth parameter is not set and the first uplink grant is addressed to the SPS C-RNTI, only the padding BSR is in a transmittable state. Pass the first uplink grant to the HARQ process, whether or not An instruction to trigger the initial transmission to the RQ process.

  (3) In the first aspect of this embodiment, when the third uplink grant received for the SPS C-RNTI indicates semi-persistent activation, the MAC entity An uplink grant is stored in the memory as the set uplink grant.

(4) The second aspect of the present embodiment is the terminal device 1, which is based on the downlink control information, the receiving unit 105 that receives PDCCH (Physical Downlink Control Channel) including downlink control information, A transmission unit 107 that transmits one bundle, wherein the bundle includes a plurality of transmissions continuous in a time domain, and a redundancy version for the first transmission in the bundle is a field included in the downlink control information The redundancy version for each of a plurality of other consecutive transmissions excluding the first transmission is given based at least on the parameters indicated by higher layer signals and the redundancy version for the first transmission.

(5) The third aspect of the present embodiment is the terminal device 1, which is based on the downlink control information, a receiving unit 105 that receives a PDCCH (Physical Downlink Control Channel) including downlink control information, A decoding unit 1071 that performs decoding of one bundle, and the bundle includes a plurality of transmissions continuous in the time domain, and a redundancy version for the first transmission in the bundle is included in the downlink control information The redundancy version for each of a plurality of other consecutive transmissions other than the first transmission indicated by the included field is given based at least on the parameters indicated by higher layer signals and the redundancy version for the first transmission. It is done.

(6) The fourth aspect of the present embodiment is the base station apparatus 3, which is a transmission unit 305 that transmits a PDCCH (Physical Downlink Control Channel) including downlink control information, and 1 based on the downlink control information. A reception unit 307 that receives transmissions of one bundle, and the bundle includes a plurality of transmissions that are continuous in the time domain, and a redundancy version for the first transmission in the bundle is included in the downlink control information The redundancy version for each of a plurality of other consecutive transmissions indicated by the field and excluding the first transmission is given based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

(7) The fifth aspect of the present embodiment is the base station apparatus 3, which transmits a PDCCH (Physical Downlink Control Channel) including downlink control information, and one bundle based on the downlink control information. The bundle includes a plurality of transmissions that are continuous in the time domain, and a redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information. The redundancy version for each of the other consecutive transmissions other than the first transmission is given based at least on the parameters indicated by the higher layer signal and the redundancy version for the first transmission.

  (8) In the second and fourth aspects of the present embodiment, the plurality of transmissions that are continuous in the time domain are PUSCH (Physical Uplink Shared Channel) transmissions.

  (9) In the third and fifth aspects of the present embodiment, the plurality of continuous transmissions in the time domain are PDSCH (Physical Downlink Shared Channel) transmissions.

  Thereby, uplink data can be transmitted efficiently.

A program that operates in the base station apparatus 3 and the terminal apparatus 1 related to the above-described embodiment related to the present invention is a program that controls a CPU (Central Processing Unit) or the like so as to realize the function of the above-described embodiment related to the present invention. (A program that causes a computer to function). Information handled by these devices is temporarily stored in RAM (Random Access Memory) during the processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). Reading, correction, and writing are performed by the CPU as necessary.

  Note that the terminal device 1 and a part of the base station device 3 in the above-described embodiment may be realized by a computer. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.

  Here, the “computer system” is a computer system built in the terminal device 1 or the base station device 3 and includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system.

  Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In such a case, a volatile memory inside a computer system serving as a server or a client may be included and a program that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  In addition, the base station device 3 in the above-described embodiment can also be realized as an aggregate (device group) composed of a plurality of devices. Each of the devices constituting the device group may include a part or all of each function or each functional block of the base station device 3 according to the above-described embodiment. The device group only needs to have one function or each function block of the base station device 3. The terminal device 1 according to the above-described embodiment can also communicate with the base station device as an aggregate.

  Further, the base station apparatus 3 in the above-described embodiment may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network). Further, the base station apparatus 3 in the above-described embodiment may have a part or all of the functions of the upper node for the eNodeB.

  In addition, part or all of the terminal device 1 and the base station device 3 in the above-described embodiment may be realized as an LSI that is typically an integrated circuit, or may be realized as a chip set. Each functional block of the terminal device 1 and the base station device 3 may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  In the above-described embodiment, the terminal device is described as an example of the communication device. However, the present invention is not limited to this, and the stationary or non-movable electronic device installed indoors or outdoors, For example, the present invention can also be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other daily life equipment.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention. The present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. It is. Moreover, it is the element described in each said embodiment, and the structure which substituted the element which has the same effect is also contained.

1 (1A, 1B, 1C) Terminal apparatus 3 Base station apparatus 101 Upper layer processing section 103 Control section 105 Reception section 107 Transmission section 301 Upper layer processing section 303 Control section 305 Reception section 307 Transmission section 1011 Radio resource control section 1013 Scheduling information Interpretation unit 1015 SPS control unit 3011 Radio resource control unit 3013 Scheduling unit 3015 SPS control unit

Claims (24)

A receiving unit that receives PDCCH (Physical Downlink Control Channel) including downlink control information;
A transmission unit that transmits one bundle based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
A redundancy version for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on a parameter indicated by an upper layer signal and a redundancy version for the first transmission. The terminal device according to claim 1, wherein the plurality of continuous transmissions in the time domain are PUSCH (Physical Uplink Shared Channel) transmissions. A receiving unit that receives PDCCH (Physical Downlink Control Channel) including downlink control information;
A decoding unit that performs decoding of one bundle based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
A redundancy version for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on a parameter indicated by an upper layer signal and a redundancy version for the first transmission. A plurality of continuous transmissions in the time domain is a PDSCH (Physical Downlink Shared
The terminal device according to claim 3. A transmitter that transmits a PDCCH (Physical Downlink Control Channel) including downlink control information;
A receiving unit for receiving transmission of one bundle based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
The redundancy version for each of a plurality of other consecutive transmissions other than the first transmission is given based at least on the parameter indicated by the higher layer signal and the redundancy version for the first transmission. The base station apparatus according to claim 6, wherein the plurality of continuous transmissions in the time domain are PUSCH (Physical Uplink Shared Channel) transmissions. Send PDCCH (Physical Downlink Control Channel) including downlink control information,
A transmission unit that transmits one bundle based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
The redundancy version for each of a plurality of other consecutive transmissions other than the first transmission is given based at least on the parameter indicated by the higher layer signal and the redundancy version for the first transmission. A plurality of continuous transmissions in the time domain is a PDSCH (Physical Downlink Shared
The base station apparatus according to claim 7. A communication method used for a terminal device,
Receive PDCCH (Physical Downlink Control Channel) including downlink control information,
One bundle is transmitted based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
The redundancy method for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on a parameter indicated by an upper layer signal and a redundancy version for the first transmission. The communication method according to claim 9, wherein the plurality of continuous transmissions in the time domain are PUSCH (Physical Uplink Shared Channel) transmissions. A communication method used for a terminal device,
Receive PDCCH (Physical Downlink Control Channel) including downlink control information,
Based on the downlink control information, perform decoding of one bundle,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
The redundancy method for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on a parameter indicated by an upper layer signal and a redundancy version for the first transmission. A plurality of continuous transmissions in the time domain is a PDSCH (Physical Downlink Shared
The communication method according to claim 11, wherein the communication method is a channel) transmission. A communication method used in a base station device,
Send PDCCH (Physical Downlink Control Channel) including downlink control information,
Receiving one bundle transmission based on the downlink control information;
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
The redundancy method for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on a parameter indicated by an upper layer signal and a redundancy version for the first transmission. The communication method according to claim 13, wherein the plurality of continuous transmissions in the time domain are PUSCH (Physical Uplink Shared Channel) transmissions. A communication method used in a base station device,
Send PDCCH (Physical Downlink Control Channel) including downlink control information,
One bundle is transmitted based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
The redundancy method for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on a parameter indicated by an upper layer signal and a redundancy version for the first transmission. A plurality of continuous transmissions in the time domain is a PDSCH (Physical Downlink Shared
The communication method according to claim 15. An integrated circuit mounted on a terminal device,
A receiving circuit for receiving PDCCH (Physical Downlink Control Channel) including downlink control information;
A transmission circuit for transmitting one bundle based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
A redundancy version for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on parameters indicated by higher layer signals and the redundancy version for the first transmission integrated circuit. The integrated circuit according to claim 17, wherein the plurality of continuous transmissions in the time domain are PUSCH (Physical Uplink Shared Channel) transmissions. An integrated circuit mounted on a terminal device,
A receiving circuit for receiving PDCCH (Physical Downlink Control Channel) including downlink control information;
A decoding circuit that performs decoding of one bundle based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
A redundancy version for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on parameters indicated by higher layer signals and the redundancy version for the first transmission integrated circuit. A plurality of continuous transmissions in the time domain is a PDSCH (Physical Downlink Shared
The integrated circuit according to claim 19. An integrated circuit mounted on a base station device,
A transmission circuit for transmitting PDCCH (Physical Downlink Control Channel) including downlink control information;
A receiving circuit for receiving transmission of one bundle based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
A redundancy version for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on parameters indicated by higher layer signals and the redundancy version for the first transmission integrated circuit. The integrated circuit according to claim 21, wherein the plurality of continuous transmissions in the time domain are PUSCH (Physical Uplink Shared Channel) transmissions. An integrated circuit mounted on a base station device,
Send PDCCH (Physical Downlink Control Channel) including downlink control information,
A transmission circuit for transmitting one bundle based on the downlink control information,
The bundle includes a plurality of transmissions that are continuous in the time domain;
The redundancy version for the first transmission in the bundle is indicated by a field included in the downlink control information,
A redundancy version for each of a plurality of other consecutive transmissions other than the first transmission is provided based at least on parameters indicated by higher layer signals and the redundancy version for the first transmission integrated circuit. A plurality of continuous transmissions in the time domain is a PDSCH (Physical Downlink Shared
24. The integrated circuit according to claim 23.

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