WO2018186137A1

WO2018186137A1 - Terminal device, base station device, communication method, and integrated circuit

Info

Publication number: WO2018186137A1
Application number: PCT/JP2018/010159
Authority: WO
Inventors: 翔一鈴木; 渉大内; 友樹吉村; 麗清劉
Original assignee: シャープ株式会社
Priority date: 2017-04-07
Filing date: 2018-03-15
Publication date: 2018-10-11
Also published as: JP2020098946A

Abstract

This terminal device receives an uplink grant and information on an upper layer, which instructs a parameter of the upper layer to be set or released, stores, as a set grant, the uplink grant, determines, on the basis of at least whether the parameter of the upper layer is set, whether an uplink HARQ operation is synchronous or asynchronous, and when the parameter of the upper layer has been previously set and the information on the upper layer which instructs the release of the parameter of the upper layer is received, the set grant is cleared.

Description

TERMINAL DEVICE, BASE STATION DEVICE, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT

The present invention relates to a terminal device, a base station device, a communication method, and an integrated circuit.
This application claims priority on Japanese Patent Application No. 2017-0776814 filed in Japan on April 7, 2017, the contents of which are incorporated herein by reference.

The wireless access method and wireless network for cellular mobile communications (hereinafter referred to as “Long Term Evolution (LTE)” or “Evolved Universal Terrestrial Radio Access: EUTRA”) is a third generation partnership project (3rd Generation Partnership Project: 3GPP ) (Non-Patent Document 1). In LTE, a base station apparatus is also called eNodeB (evolvedvolveNodeB), and a terminal device is also called UE (UserＵＥEquipment). 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.

LTE supports Time Division Duplex (TDD). LTE employing the TDD scheme is also referred to as TD-LTE or LTE TDD. In TDD, uplink signals and downlink signals are time division multiplexed. Further, LTE corresponds to Frequency Division Duplex (FDD).

In 3GPP, enhancement of latency reduction (latency reduction enhancements) is being studied. For example, high-speed grants for scheduling requests (Scheduling request first grant) and high-speed grants scheduled in advance (Pre-scheduled first grant) have been studied as enhancement of the reduction in waiting time (Non-patent Document 2).

However, a specific method has not been sufficiently studied for the procedure when uplink data is transmitted in the wireless communication system as described above.

One aspect of the present invention has been made in view of the above points, and an object thereof is to provide a terminal device, a base station device, a communication method, and an integrated circuit capable of efficiently transmitting uplink data. The purpose is to do.

(1) In order to achieve the above object, the aspect of the present invention takes the following measures. That is, the terminal device according to an aspect of the present invention determines whether to generate a MAC protocol data unit based at least on whether or not the receiving unit that receives the upper layer parameter skipUplinkTxSPS and the upper layer parameter skipUplinkTxSPS are set. A medium access control layer processing unit for determining, when the uplink HARQ operation is asynchronous, at least based on whether the upper layer parameter skipUplinkTxSPS is set Determine whether to perform non-adaptive retransmissions.

(2) In addition, the terminal device according to an aspect of the present invention sets the uplink grant, the reception unit that receives the information of the upper layer that instructs setting or release of the parameter skipUplinkTxSPS of the upper layer, and the uplink grant. A medium access control layer processing unit that determines whether an uplink HARQ operation is synchronous or asynchronous based on at least whether or not the upper layer parameter skipUplinkTxSPS is set. The access control layer processing unit sets the upper layer parameter skipUplinkTxSPS when the upper layer parameter skipUplinkTxSPS is set in advance and receives the upper layer information instructing the release of the upper layer parameter skipUplinkTxSPS. Clear the grant.

(3) In addition, the base station apparatus according to an aspect of the present invention includes a transmission unit that transmits an upper layer parameter skipUplinkTxSPS used by the terminal apparatus to determine whether to generate a MAC protocol data unit, When the uplink HARQ operation is asynchronous with the receiving unit that receives the transmission, non-adaptive retransmission is performed based on at least whether or not the upper layer parameter skipUplinkTxSPS is set for the terminal device. And a medium access control layer processing unit for determining whether or not to execute.

(4) In addition, the base station apparatus according to an aspect of the present invention uses the upper layer information instructing the setting or release of the upper layer parameter skipUplinkTxSPS, and the uplink grant stored by the terminal apparatus as the set grant. A transmitting unit for transmitting, and a medium access control layer processing unit for determining whether an uplink HARQ operation is synchronous or asynchronous based at least on whether or not the upper layer parameter skipUplinkTxSPS is set for the terminal device. The medium access control layer processing unit has the upper layer parameter skipUplinkTxSPS previously set for the terminal device, and the upper layer information instructing the release of the upper layer parameter skipUplinkTxSPS Is transmitted to the terminal device, the set grant is determined by the terminal device. Is considered to be cleared.

(5) In addition, the communication method of the terminal device according to one aspect of the present invention receives the upper layer parameter skipUplinkTxSPS and generates a MAC protocol data unit based at least on whether or not the upper layer parameter skipUplinkTxSPS is set. And whether to perform non-adaptive retransmission based on at least whether the upper layer parameter skipUplinkTxSPS is set when uplink HARQ operation is asynchronous.

(6) According to another aspect of the present invention, a communication method for a terminal apparatus receives upper layer information instructing setting or release of an upper layer parameter skipUplinkTxSPS, and an uplink grant, and sets the uplink grant. And whether the uplink HARQ operation is synchronous or asynchronous based on at least whether the upper layer parameter skipUplinkTxSPS is set, and the upper layer parameter skipUplinkTxSPS is set in advance. If the upper layer information indicating release of the upper layer parameter skipUplinkTxSPS is received, the set grant is cleared.

(7) In addition, the communication method of the base station apparatus according to an aspect of the present invention transmits an upper layer parameter skipUplinkTxSPS used by the terminal apparatus to determine whether to generate a MAC protocol data unit, and performs non-adaptive re-transmission. If the transmission is received and uplink HARQ operation is asynchronous, non-adaptive retransmission is performed by the terminal device based at least on whether the higher layer parameter skipUplinkTxSPS is set for the terminal device Decide whether or not.

(8) In addition, in the communication method of the base station apparatus according to an aspect of the present invention, the uplink information stored by the terminal apparatus as information on the upper layer instructing the setting or release of the parameter skipUplinkTxSPS of the upper layer and the grant to be set Transmitting a link grant, determining whether uplink HARQ operation is synchronous or asynchronous based at least on whether the upper layer parameter skipUplinkTxSPS is set for the terminal device, and the upper layer parameter skipUplinkTxSPS is determined by the terminal When the upper layer information that is set in advance for the device and the upper layer information instructing the release of the upper layer parameter skipUplinkTxSPS is transmitted to the terminal device, the set grant is cleared by the terminal device It is considered to be done.

According to one aspect of 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 figure which shows the example of the special field for activation of the semipersistent scheduling in this embodiment. It is a figure which shows the example of the special field for the release of the semipersistent scheduling in this embodiment. It is a figure for demonstrating the example of non-empty transmission and empty transmission in this embodiment. It is a figure for demonstrating the method of clearing the grant set in this embodiment. It is a figure which shows the example of the special field for inactivation of the non-adaptive transmission of the transport block initially transmitted by the semipersistent PUSCH 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.

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 radio communication system includes terminal apparatuses 1A to 1C and a base station apparatus 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). Here, the uplink control information may include channel state information (CSI: Channel State Information) used to indicate the state of the downlink channel. Further, the uplink control information may include a scheduling request (SR: Scheduling Request) used for requesting UL-SCH resources. Further, the uplink control information may include HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement). HARQ-ACK may indicate HARQ-ACK for downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink-Shared Channel: DL-SCH, Physical Downlink Shared Channel: PDSCH).

That is, HARQ-ACK may indicate ACK (acknowledgement) or NACK (negative-acknowledgement). Here, HARQ-ACK is also referred to as ACK / NACK, HARQ feedback, HARQ response, HARQ information, or HARQ control information.

The PUSCH is used to transmit uplink data (Uplink-Shared Channel: UL-SCH). The PUSCH may also be used to transmit HARQ-ACK and / or CSI along with uplink data. Also, the PUSCH may be used to transmit only CSI, or only HARQ-ACK and CSI. That is, PUSCH may be used to transmit only uplink control information.

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 transmit and receive RRC signaling (RRC message: Radio Resource Control message, RRC information: also called Radio Resource Control information) in a radio resource control (RRC: Radio Resource Control) layer. May be. Further, the base station device 3 and the terminal device 1 may transmit and receive a MAC control element in a MAC (Medium Access Control) layer. Here, the RRC signaling and / or the MAC control element is also referred to as a higher layer signal.

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 device 3 may be signaling dedicated to a certain terminal device 1 (also referred to as dedicated signaling). That is, user device specific (user device specific) information may be transmitted to a certain terminal device 1 using dedicated signaling.

PRACH is used to transmit a random access preamble. PRACH may also be used to indicate initial connection establishment (initial ハンドオーバ connection establishment) procedures, handover procedures, connection re-establishment procedures, synchronization for uplink transmissions (timing adjustment), and PUSCH resource requirements. Good.

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 for transmitting 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 to transmit downlink control information (Downlink Control Information: DCI). Here, a plurality of DCI formats are defined for transmission of downlink control information. 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 DCI format for the downlink includes information related to PDSCH scheduling. For example, the DCI format for the downlink includes a carrier indicator field (CIF: Carrier Indicator Field), 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. The HARQ process number is also referred to as a HARQ process ID (identifier).

Further, for example, as a DCI format for uplink, a DCI format (for example, DCI format 0, DCI format 0D, DCI) used for scheduling one PUSCH (transmission of one uplink transport block) in one cell Format 4) is defined.

Here, the information on PUSCH scheduling is included in the DCI format for the uplink. For example, the DCI format for uplink includes a carrier indicator field (CIF: Carrier Indicator Field), information on a transmission power command (TPC command) for a scheduled PUSCH (TPC command for scheduled PUSCH), information on a cyclic shift for DMRS (Cyclic shift DMRS), information about MCS and / or redundancy version (Modulation and coding scheme and / or redundancy version), and / or information about resource block allocation and / or hopping resource allocation (Resource block assignment and / or hopping resource) allocation), and so on. Here, the DCI format for the uplink is also referred to as an uplink grant and / or an uplink assignment.

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 terminal device 1 may monitor a set of PDCCH candidates (PDCCH candidates) and / or EPDCCH candidates (EPDCCH candidates). Hereinafter, PDCCH may indicate PDCCH and / or EPDDCH. Here, the PDCCH candidate indicates a candidate in which the PDCCH may be arranged and / or transmitted by the base station apparatus 3. In addition, the term “monitor” may include the meaning that the terminal apparatus 1 attempts to decode each PDCCH in the set of PDCCH candidates according to all the DCI formats to be monitored.

The set of PDCCH candidates that the terminal device 1 monitors is also referred to as a search space. The search space may include a common search space (CSS: Common Search Space). For example, the CSS may be defined as a common space for the plurality of terminal devices 1. The search space may include a user device specific search space (USS: “UE-specific” Search “Space”). For example, the USS may be defined based on at least a C-RNTI assigned to the terminal device 1. The terminal device 1 may monitor the PDCCH and detect the PDCCH addressed to itself in CSS and / or USS.

Here, the RNTI assigned to the terminal device 1 by the base station device 3 is used for transmission of the 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.

DCI format / PDCCH / uplink grant / downlink assignment to which CRC parity bits scrambled by RNTI are added. (1) DCI format / PDCCH / uplink grant / downlink assignment corresponding to RNTI, (2 ) DCI format / PDCCH / uplink grant / downlink assignment addressed to RNTI, (3) DCI format / PDCCH / uplink grant / downlink assignment for RNTI.

Here, the RNTI may include a C-RNTI (Cell-Radio Network Temporary Identifier). The C-RNTI is a unique (unique) identifier for the terminal device 1 used for RRC connection and scheduling identification. C-RNTI may also be used for dynamically scheduled unicast transmissions.

RNTI may include SPS C-RNTI (Semi-Persistent Scheduling C-RNTI). 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 transmission scheduled periodically. For example, the SPS C-RNTI may be used for semi-persistently scheduled transmission activation, reactivation, and / or retransmission. Hereinafter, activation may include the meaning of reactivation and / or retransmission.

The SPS C-RNTI may also be used 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 this embodiment may include a newly defined RNTI for reducing the waiting time.

RNTI may include RA-RNTI (Random Access RNTI). RA-RNTI is an identifier used for transmission of a random access response message. That is, RA-RNTI is used for transmission of a random access response message in a random access procedure. For example, when transmitting a random access preamble, the terminal device 1 may monitor the PDCCH with the CRC scrambled by the RA-RNTI. Also, the terminal device 1 may receive a random access response on the PDSCH based on the detection of the PDCCH with the CRC scrambled by the RA-RNTI.

RNTI may include P-RNTI (Paging RNTI). P-RNTI is an identifier used for notification of changes in paging and system information. For example, P-RNTI is used for paging and transmission of system information messages. For example, the terminal device 1 may receive paging on the PDSCH based on detection of a PDCCH with a CRC scrambled by the P-RNTI.

RNTI may also include SI-RNTI (System Information RNTI). SI-RNTI is an identifier used for broadcasting system information. For example, SI-RNTI is used for transmission of a system information message. For example, the terminal device 1 may receive the system information message on the PDSCH based on the detection of the PDCCH with the CRC scrambled by the SI-RNTI.

Here, for example, PDCCH with CRC scrambled by C-RNTI may be transmitted in USS or CSS. Also, the PDCCH with CRC scrambled by RA-RNTI may be transmitted only in CSS. Also, the PDCCH with CRC scrambled by P-RNTI may be transmitted only in CSS. Also, the PDCCH with CRC scrambled by SI-RNTI may be transmitted only in CSS.

Also, the PDCCH with CRC scrambled by the SPS C-RNTI may be transmitted only in the primary cell and the primary secondary cell. Also, PDCCH with CRC scrambled by SPS C-RNTI may be transmitted in USS or CSS.

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.

PMCH is used to transmit 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 correct the propagation path of the downlink physical channel. Here, the downlink reference signal is used for the terminal apparatus 1 to calculate downlink channel state information.

In this embodiment, the following five types of downlink reference signals are used.
-CRS (Cell-specific Reference Signal)
-URS (UE-specific Reference Signal) related to PDSCH
DMRS (Demodulation Reference Signal) related to EPDCCH
NZP CSI-RS (Non-Zero Power Chanel State Information-Reference Signal)
・ ZP CSI-RS (Zero Power Chanel State Information-Reference Signal)
MBSFN RS (Multimedia Broadcast and Multicast Service over Single Frequency Network Reference signal)
・ PRS (Positioning Reference Signal)
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 (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 (transport block: TB) or a MAC PDU (Protocol Data Unit). In the MAC layer, HARQ (HybridbrAutomatic Repeat reQuest) is controlled 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.

Hereafter, 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, the present 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”. The frame structure corresponding to TDD is also referred to as “frame structure type 2”.

Here, one or a plurality of serving cells to be set may include one primary cell and zero or more secondary cells. For example, a primary cell is a serving cell that has undergone an initial connection establishment (initial connection establishment) procedure, 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.

Further, 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).

Here, transmission on the PUCCH may be performed only in the primary cell. Also, the primary cell is not deactivated (primary cell cannot be deactivated). Cross-carrier scheduling is not applied to primary cells (Cross-carrier-scheduling does not apply to primary cell). That is, the primary cell is always scheduled using the PDCCH in the primary cell (primary cell is always scheduled via its PDCCH).

Also, the secondary cell is activated and / or deactivated. Further, when PDCCH (may be monitoring of PDCCH) is set in a certain secondary cell, the cross carrier scheduling may not be applied to the certain secondary cell (In a case that PDCCH (PDCCH monitoring) of a secondary cell is configured, cross-carries scheduling may not apply this secondary cell). That is, in this case, the secondary cell may always be scheduled using the PDCCH in the secondary cell. Further, when PDCCH (may be monitoring of PDCCH) is not set in a certain secondary cell, cross-carrier scheduling is applied, and the secondary cell is always PDCCH in one other serving cell (one other serving cell). May be scheduled.

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

FIG. 2 is a diagram showing a configuration of slots 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. Further, 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. Also, 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.

In the time domain, a radio frame is composed of 20 slots. In the time domain, a subframe is composed of two slots. That is, in the time domain, a radio frame is composed of 10 subframes.

Also, in the present embodiment, in order to explain the processing in the terminal device 1, the processing in the MAC entity in the terminal device 1, the “Multiplexing and assembly” entity in the terminal device 1, and / or the processing in the HARQ entity in the terminal device 1 is described. is doing. Hereinafter, the “Multiplexing and assembly” entity is also referred to as a first entity or a first process. The MAC entity comprises one first entity and one or more HARQ entities. 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.

In this embodiment, processing in one MAC entity in the terminal device 1 will be described. In the present embodiment, each of the one or more HARQ entities corresponds to one serving cell. For example, one MAC entity of the terminal device 1 may include a HARQ entity corresponding to the primary cell and a HARQ entity corresponding to the secondary cell.

The HARQ entity manages multiple HARQ processes. The HARQ entity instructs the HARQ process to trigger an initial transmission or retransmission. Here, the initial transmission is also referred to as HARQ initial transmission or PUSCH initial transmission. Here, retransmission is also referred to as HARQ retransmission or PUSCH retransmission.

The terminal device 1 and the base station device 3 provide HARQ functionality. In the uplink, synchronous HARQ (synchronous HARQ) or asynchronous HARQ (asynchronous HARQ) is applied. That is, the uplink HARQ operation includes synchronous and asynchronous.

The base station apparatus 3 may include the upper layer parameter in the upper layer signal (RRC message) and transmit it to the terminal apparatus 1. The base station device 3 may transmit an upper layer signal (RRC message) instructing setting or release of an upper layer parameter to the terminal device 1.

The base station apparatus 3 may include the HARQ parameter in a higher layer signal (RRC message) and transmit it to the terminal apparatus 1. The base station apparatus 3 may transmit information indicating the setting or release of the HARQ parameter in the higher layer signal (RRC message) to the terminal apparatus 1. Whether synchronous HARQ or asynchronous HARQ is applied to the HARQ process may be determined based on at least HARQ parameters. The HARQ parameter may be set for each serving cell. The HARQ parameter may be set for each group of serving cells. The HARQ parameter may be set for the terminal device 1. That is, the HARQ parameter may correspond to a plurality of serving cells.

Unless stated otherwise, the embodiments described below describe processing for one serving cell, one HARQ entity, and one HARQ process.

The HARQ parameter may be used to determine uplink HARQ timing. k _PUSCH may be provided based at least on HARQ parameters. k _PUSCH may be provided based at least on whether HARQ parameters are set. Here, the terminal device 1 adjusts the transmission of the PUSCH in the subframe n based on the detection of the PDCCH (uplink grant) in the subframe nk _PUSCH . That is, the subframe for transmitting the PUSCH may be given based at least on the HARQ parameter. That is, the subframe for transmitting the PUSCH may be given based at least on whether or not the HARQ parameter is set.

Unless specified otherwise, the uplink grants described below are (1) an uplink grant for scheduling PUSCH initial transmission, or (2) an uplink for scheduling PUSCH transmission (initial transmission or retransmission). It may be replaced with a grant. The uplink grant for the PUSCH initial transmission and the uplink grant for the PUSCH retransmission may be detected in different types of search spaces.

In the present embodiment, the terminal device 1 and the base station device 3 support both or one of synchronous HARQ and asynchronous HARQ. The terminal device 1 may determine whether to apply synchronous HARQ or asynchronous HARQ to the HARQ process based at least on part or all of the following elements.
Element 1: Whether HARQ parameters related to HARQ are set Element 2: Search space in which PDCCH including uplink grant is detected (common search space, user equipment specific search space)
Element 3: RNTI (C-RNTI, SPS C-RNTI) used for transmission of PDCCH including uplink grant
Element 4: Whether the uplink grant is a set grant For example, when HARQ parameters are not set for the terminal device 1, synchronous HARQ may be applied to the corresponding HARQ process .

For example, when HARQ parameters are set for the terminal device 1, asynchronous HARQ may be applied to the corresponding HARQ process.

When HARQ parameters are set for the terminal device 1, either synchronous HARQ or asynchronous HARQ is applied to the corresponding HARQ process based on the type of search space in which the PDCCH including the uplink grant is detected. It may be determined whether to do.

For example, when HARQ parameters are set for the terminal device 1 and a PDCCH including an uplink grant is detected in the common search space, synchronous HARQ may be applied to the corresponding HARQ process. .

For example, when HARQ parameters are set for the terminal device 1 and a PDCCH including an uplink grant is detected in the user device specific search space, asynchronous HARQ is applied to the corresponding HARQ process. Also good.

Synchronous HARQ may be applied to transport blocks transmitted on PUSCH scheduled using DCI format 0. Asynchronous HARQ may be applied to transport blocks transmitted on PUSCH scheduled using DCI format 0D. DCI format 0 does not include information regarding the HARQ process number. The DCI format 0D includes information regarding the HARQ process number.

When the HARQ parameter is not set for the terminal device 1, the terminal device 1 may monitor the DCI format 0 in the common search space and the user device specific search space.

When the HARQ parameter is set for the terminal device 1, the terminal device 1 may monitor the DCI format 0 in the common search space and monitor the DCI format 0D in the user device specific search space. Good.

When HARQ parameters are set for the terminal device 1, based on at least the type of RNTI (for example, C-RNTI, SPS C-RNTI) used for transmission of PDCCH including uplink grant It may be determined whether to apply synchronous HARQ or asynchronous HARQ to the HARQ process to be performed.

For example, when HARQ parameters are set for the terminal device 1 and SPS C-RNTI is used for PDCCH transmission including an uplink grant, synchronous HARQ is applied to the corresponding HARQ process. May be.

For example, when HARQ parameters are set for the terminal device 1, SPS C-RNTI is used for transmission of a PDCCH including an uplink grant, and the PDCCH is detected in the common search space In addition, synchronous HARQ may be applied to the corresponding HARQ process.

For example, the HARQ parameter is set for the terminal device 1 and SPS C-RNTI is used for transmission of the PDCCH including the uplink grant, and the PDCCH is detected in the user device specific search space. In this case, asynchronous HARQ may be applied to the corresponding HARQ process.

For example, when HARQ parameters are set for the terminal device 1 and C-RNTI is used for transmission of a PDCCH including an uplink grant, asynchronous HARQ is applied to the corresponding HARQ process. May be.

For example, when HARQ parameters are set for the terminal device 1, C-RNTI is used for transmission of a PDCCH including an uplink grant, and the PDCCH is detected in a common search space. Synchronous HARQ may be applied to the corresponding HARQ process.

For example, the HARQ parameter is set for the terminal apparatus 1, the C-RNTI is used for transmission of the PDCCH including the uplink grant, and the PDCCH is detected in the user apparatus specific search space. In some cases, asynchronous HARQ may be applied to the corresponding HARQ process.

When HARQ parameters are set for the terminal device 1, it is determined whether to apply synchronous HARQ or asynchronous HARQ to the corresponding HARQ process based at least on whether semi-persistent scheduling is used. May be.

When HARQ parameters are set for the terminal device 1, either synchronous HARQ or asynchronous HARQ is applied to the corresponding HARQ process based at least on whether the uplink grant is a grant to be set. May be determined.

When HARQ parameters are set for the terminal device 1, either synchronous HARQ or asynchronous HARQ is applied to the corresponding HARQ process based at least on whether the fourth parameter skipUplinkTxSPS is set May be determined.

When HARQ parameters are set for the terminal device 1, (1) whether it is semi-persistent scheduling, (2) whether the uplink grant is set, and / or (3) Based on at least whether the fourth parameter skipUplinkTxSPS is set, it may be determined whether to apply synchronous HARQ or asynchronous HARQ to the corresponding HARQ process.

For example, when HARQ parameters are set for the terminal device 1 and semi-persistent scheduling is used, synchronous HARQ may be applied to the corresponding HARQ process.

For example, when HARQ parameters are set for the terminal device 1 and semi-persistent scheduling is used, asynchronous HARQ may be applied to the corresponding HARQ process.

For example, when HARQ parameters are set for the terminal apparatus 1 and semi-persistent scheduling is not performed, synchronous HARQ or asynchronous HARQ is applied to the corresponding HARQ process based on the above-described example. Also good.

For example, when HARQ parameters are set for the terminal device 1 and the grant is an uplink grant, synchronous HARQ may be applied to the corresponding HARQ process.

For example, when HARQ parameters are set for the terminal device 1 and the grant is an uplink grant, asynchronous HARQ may be applied to the corresponding HARQ process.

For example, when the HARQ parameter is set for the terminal device 1 and the grant is not the grant for which the uplink grant is set, the synchronous HARQ or the asynchronous HARQ for the corresponding HARQ process is performed based on the above-described example. May be applied. The uplink grant that is not the set grant may be an uplink grant corresponding to C-RNTI.

For example, when the HARQ parameter is set for the terminal device 1, the grant is set for the uplink grant, and the fourth parameter skipUplinkTxSPS is set, the corresponding HARQ process is Thus, synchronous HARQ may be applied.

For example, when the HARQ parameter is set for the terminal device 1 and the grant is an uplink grant, and the fourth parameter skipUplinkTxSPS is not set, the corresponding HARQ process is Asynchronous HARQ may be applied.

Hereinafter, the initial transmission in the semi-persistent scheduling will be described.

In the initial transmission in the semi-persistent scheduling, basically, the operation (processing) in the terminal device 1 is described, but the base station device 3 performs the same operation (processing) corresponding to the operation (processing) of the terminal device 1. Of course).

Here, transmission on PUSCH (or transmission on UL-SCH) may be 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. The subframe is also referred to as TTI (Transmission Time Interval).

Hereinafter, for simplification of description, the SFN (radio frame) and subframe in which transmission is performed on the PUSCH are also simply referred to as subframes. 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 an interval (period) of semi-persistent scheduling in the uplink for the terminal apparatus 1. For example, the base station apparatus 3 may transmit the first parameter semiPersistSchedIntervalUL for indicating the value of the semi-persistent scheduling interval in the uplink to the terminal apparatus 1 by including it in the upper layer signal (RRC message). Good.

For example, the base station apparatus 3 uses the first parameter semiPersistSchedIntervalUL as the value of the interval for semi-persistent scheduling, 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) may be set.

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

For example, the first parameter semiPersistSchedIntervalUL may be set for each serving cell. Also, the first parameter semiPersistSchedIntervalUL may be set for the primary 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).

Further, the base station apparatus 3 is semi-persistent (semi-persistent, semi-persistent, periodic) with respect to the terminal apparatus 1 using the DCI format (for example, DCI format 0, DCI format 0D) for the uplink. The terminal device 1 may be instructed to allocate PUSCH resources (physical resource blocks) 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, in the terminal device 1, the CRC parity bit added to the DCI format is scrambled by the SPS C-RNTI, and the information field regarding the NDI (New data indicator) included in the DCI format is “0”. If it is set, 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 information field regarding NDI 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, semi-persistent activation may include the meaning of semi-persistent scheduling activation. 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 the 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. 3 is a diagram showing an example of special fields (Special fields) for activation of semi-persistent scheduling. As shown in FIG. 3, multiple 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. 3, for example, when a DCI format for uplink (eg, DCI format 0) is used to activate a semi-persistent schedule, for a scheduled PUSCH included in the DCI format for uplink. The TPC command information (TPC command for forscheduled PUSCH) field is set to '00', the DMRS cyclic shift information (Cyclic shift to DMRS) field is set to '000', and the MCS and redundancy version information ( The most significant bit (MSB: “most significant” bit) of the field of “Modulation”, “coding”, “scheme” and “redundancy” version may be set to '0'.

Also, for example, when a DCI format for the uplink (for example, DCI format 0D) is used for the activation of the semi-persistent schedule, information on the TPC command for the scheduled PUSCH included in the DCI format for the uplink ( TPC (command for forscheduled PUSCH) field is set to '00', DMRS cyclic shift information (Cyclic shift to DMRS) field is set to '000', MCS and redundancy version information (Modulation and coding coding scheme The most significant bit (MSB: most significant bit) of the redundancy (version) field is set to '0', and all the fields related to HARQ process numbers (HARQ process number) are set to '0' May be.

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 field for information on number (HARQ process number) is set to '000 (for FDD)' or '0000 (for TDD)' and the most significant bit of the field for MCS (Modulation and Coding scheme) (MSB) may be set to '0', and the field of redundancy version information (redundancy version) may be set to '00'.

That is, the terminal device 1 may activate 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. 4 is a diagram illustrating an example of special fields for the release of semi-persistent scheduling. As shown in FIG. 4, 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. 4, 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 forscheduled PUSCH) is set to '00', the information on the cyclic shift for DMRS (Cyclic shift to DMRS) is set to '000', and the information about the MCS and redundancy version (Modulation and coding scheme and redundancy version) field is set to '11111' and information about resource block assignment and hopping resource assignment (Resource block assignment and hopping res all fields of ource） allocation) may be set to '1'.

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 a DCI format for uplink (for example, DCI format 0D) is used for releasing a semi-persistent schedule, information (TPC) regarding a TPC command for a scheduled PUSCH included in the DCI format for uplink. command for scheduled PUSCH) field is set to '00', information on cyclic shift for DMRS (Cyclic shift DMRS) field is set to '000', information about MCS and redundancy version (Modulation and coding scheme and redundancy version) field is set to '11111' and information about resource block allocation and hopping resource allocation (Resource block assignment and hopping resource allocati On) fields may all be set to ‘1’, and all fields related to HARQ process numbers (HARQ process number) may be set to ‘0’.

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 The information field (HARQ process number) is set to '000 (for FDD)' or '0000 (for TDD)', and the MCS information (Modulation and Coding cheme) field is set to '11111'. The redundancy version information (redundancy version) field is set to '00', and the resource block allocation information (Resource block assignment) field (all fields of a plurality of fields may be used). There may be '1' set.

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 apparatus 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.

Also, for example, in the DCI format to which CRC parity bits scrambled by SPS C-RNTI are added, “1 (1 subframe)” is set for the secondary cell as the semi-persistent scheduling interval value. , It may be transmitted to the secondary cell. Also, for example, in the DCI format to which CRC parity bits scrambled by SPS C-RNTI are added, an interval shorter than “10 (10 subframes)” is set for the secondary cell as a semi-persistent scheduling interval value. In this case, 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 an effective uplink grant (a valid uplink grant ) Must have. Here, the uplink grant may include the meaning that 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. The uplink grant received dynamically on the PDCCH is also referred to as an uplink grant corresponding to C-RNTI.

Also, 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.

Also, the terminal device 1 may store the uplink grant that is dynamically received on the PDCCH and / or the uplink grant that is 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 uplink grant dynamically received on the PDCCH and / or the uplink grant set semi-permanently is referred to as a stored uplink grant (a stored uplink grant).

Further, when the semi-persistent activation is instructed, the terminal device 1 (MAC entity) stores the DCI format received from the base station device 3 as an uplink grant to be set (a configured uplink grant). May be. Here, the set uplink grant may be referred to as a set semi-persistent scheduling uplink grant (SPS UL grant) or set grant. 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, retransmission to the semi-persistent PUSCH is performed based on the uplink grant (SPS UL grant) stored by the HARQ process. It is possible to continue.

Also, the uplink grant of semi-persistent scheduling may also be referred to as SPS uplink grant, semi-persistent grant, or semi-persistent scheduling assignment.

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).

In addition, when semi-persistent scheduling is enabled, SPS C-RNTI, a parameter for indicating the value of the semi-persistent scheduling interval in the uplink, the number of empty transmissions before release (Number of first) A parameter for instructing empty３transmissions before release (also called third parameter implicitReleaseAfter) and / or SPS deactivation timer (SPS タイマー deactivation timer, also called fourth parameter skipUplinkTxSPS) is supplied (set). May be. Here, empty transmission (also referred to as empty transmission) will be described later. In addition, the third parameter implicitReleaseAfter４ and the fourth parameter skipUplinkTxSPS 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).

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 grant, SPS uplink grant) may occur (occurrence) (consider sequentially).

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 _Equation (1), SFN _{start_time} and subframe _{start_time} indicate 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 number (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.

Also, 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. 5 is a diagram for explaining an example of non-empty transmission (Empty transmission) and non-empty transmission in the present embodiment. As shown in FIG. 5, the MAC protocol data unit (MAC PDU: MAC Protocol Protocol Data Unit) includes a MAC header (MAC header), a MAC service data unit (MAC SDU: MAC Service Data Unit), and a MAC control element (MAC CE: MAC Control Element) and padding (padding bit). Here, the MAC protocol data unit may correspond to uplink data (UL-SCH). The MAC header may include one or more MAC subheaders. The MAC subheader corresponds to one MAC control element or one MAC service data unit. The MAC subheader may include a logical channel identifier corresponding to the MAC control element. The MAC subheader may include a logical channel identifier corresponding to one MAC service data unit.

Here, as MAC control elements, at least SPS confirmation MAC control element (SPS confirmation MAC CE), buffer status report MAC control element (BSR MAC CE: Buffer Status Report MAC CE, MAC control element used for buffer status report), Timing Advance Command MAC Control Element (TAC MAC: CE: Timing Advance Command MAC: CE, MAC Control Element Used to Send Timing Advance Command), Power Headroom Report MAC Control Element (PHR MAC: CE: Power Headroom Report MAC: CE, Power Head MAC control elements used for room reports) and / or activated / deactivated MAC control elements (Activation / Deactivation MAC CE, MAC control elements used for transmitting the activation / deactivation command), includes a plurality of MAC control elements may be defined.

In addition, a plurality of buffer status reports including at least regular BSR, periodic BSR, and padding BSR may be defined as buffer status reports. 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 logical channel group (LCG: Logical Channel Group), and its transmission priority is higher than an already transmittable logical channel belonging 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.

Also, the periodic BSR may be triggered when a predetermined timer (periodicBSR-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. 5, the MAC protocol data unit may include zero, one, or a plurality of MAC service data units. The MAC protocol data unit may also include zero, one, or multiple MAC control elements. Also, the padding may be added to the end of the MAC protocol data unit (Padding may occur at the end of the MAC PDU).

The base station device 3 may transmit the fourth parameter skipUplinkTxSPS to the terminal device 1. For example, the base station apparatus 3 may transmit the fourth parameter skipUplinkTxSPS using an upper layer signal (for example, an RRC layer signal). The fourth parameter skipUplinkTxSPS is used to determine whether to skip uplink transmission corresponding to the set grant. If the fourth parameter skipUplinkTxSPS is set and there is no data (available 送信 data for transmission) available for transmission in the buffer of the terminal device 1, the terminal device 1 performs uplink transmission corresponding to the set grant. To skip. Here, the uplink transmission may be a PUSCH transmission. The fourth parameter skipUplinkTxSPS may be applied to the primary cell.

The base station device 3 may transmit the fifth parameter skipUplinkTxDynamic to the terminal device 1. For example, the base station apparatus 3 may transmit the fifth parameter skipUplinkTxDynamic using an upper layer signal (for example, an RRC layer signal). The fifth parameter skipUplinkTxDynamic is used to determine whether to skip the uplink transmission corresponding to the uplink grant corresponding to C-RNTI. When the fifth parameter skipUplinkTxDynamic is set and there is no data (available 送信 data for transmission) available for transmission in the buffer of the terminal device 1, the terminal device 1 sets the uplink grant corresponding to C-RNTI. Skip the corresponding uplink transmission. Here, the uplink transmission may be a PUSCH transmission. The fifth parameter skipUplinkTxDynamic may be applied to a plurality of serving cells.

Here, the data available for transmission may include a MAC service data unit, a first MAC control element, and aperiodic channel state information. The first MAC control element may include an SPS confirmation MAC control element, a buffer status report MAC control element for regular BSR, and a power headroom report MAC control element. Data available for transmission does not include the second MAC control element. The second MAC control element includes a buffer status report MAC control element for padding BSR and a buffer status report for periodic BSR.

Hereinafter, the MAC service data unit included in the MAC protocol data unit may mean that the MAC protocol data unit includes a MAC service data unit and a MAC subheader for the MAC service data unit. Hereinafter, including a MAC control element in the MAC protocol data unit may mean that the MAC protocol data unit includes a control element and a MAC subheader for the control element.

That is, the MAC protocol data unit including data that can be used for transmission may be a MAC protocol data unit including at least one of the MAC service data unit and the first MAC control element.

That is, the MAC protocol data unit that does not include data that can be used for transmission includes (1) a MAC service data unit and a MAC protocol data unit that does not include the first MAC control element, and (2) a MAC service data unit, And a MAC protocol data unit that does not include the first MAC control element and includes the second MAC control element, or (3) includes only the second MAC control element that does not include the MAC service data unit. The MAC protocol data unit may be included.

A report of aperiodic channel state information is requested (triggered) by downlink control information. Aperiodic channel state information reporting is performed using PUSCH. The terminal device 1 may transmit both the MAC protocol data unit and the aperiodic channel state information using the PUSCH.

Whether to skip uplink transmission is determined for each subframe.

Skipping uplink transmission may be defined as an operation (processing) in the first entity in the terminal device 1 and the HARQ entity. The HARQ entity identifies the HARQ process associated with the subframe. The HARQ entity obtains the MAC protocol data unit from the first entity. The HARQ entity indicates the uplink grant to the first entity. If the HARQ entity can obtain the MAC protocol data unit from the first entity, the HARQ entity passes the MAC protocol data unit to the identified HARQ process and instructs the identified HARQ process to trigger initial transmission. If the HARQ entity fails to obtain a MAC protocol data unit from the first entity, it does not instruct the HARQ process to trigger an initial transmission.

The first entity generates a MAC protocol data unit and passes the generated MAC protocol data unit to the HARQ entity. The first entity does not generate a MAC protocol data unit when the following condition is satisfied.

The first entity (1) has not requested transmission of aperiodic channel state information in this subframe, (2) the MAC protocol data unit does not include a MAC service data unit, and (3) The MAC protocol data unit includes the second MAC control element, (4) the fourth parameter skipUplinkTxSPS is set, and (5) the grant in which the uplink grant indicated by the HARQ entity is set. If not, do not generate a MAC protocol data unit for the HARQ entity. That is, the first entity: (1) does not request transmission of aperiodic channel state information in this subframe, and (2) does not include data that the MAC protocol data unit can use for transmission. And (3) if the fourth parameter skipUplinkTxSPS is set and (4) the uplink grant indicated by the HARQ entity is a set grant, no MAC protocol data unit is generated for the HARQ entity . Here, the uplink grant other than the set grant may be an uplink grant corresponding to C-RNTI.

The first entity (1) has not requested transmission of aperiodic channel state information in this subframe, (2) the MAC protocol data unit does not include a MAC service data unit, and (3) The MAC protocol data unit includes the second MAC control element, (4) the fifth parameter skipUplinkTxDynamic is set, and (5) the grant other than the grant in which the uplink grant indicated by the HARQ entity is set If it is an uplink grant, it does not generate a MAC protocol data unit for the HARQ entity. That is, the first entity: (1) does not request transmission of aperiodic channel state information in this subframe, and (2) does not include data that the MAC protocol data unit can use for transmission. And (3) if the fifth parameter skipUplinkTxDynamic is set and (4) the uplink grant indicated by the HARQ entity is an uplink grant other than the grant, the MAC protocol for the HARQ entity Do not generate data units. Here, the uplink grant other than the set grant may be an uplink grant corresponding to C-RNTI.

That is, skipping uplink transmission does not generate a MAC protocol data unit or does not instruct the HARQ process to trigger initial transmission.

“Transmission of aperiodic channel state information in this subframe has not been requested, and the MAC protocol data unit does not include a MAC service data unit, and the MAC protocol data unit includes a second MAC control element “Obtaining” may mean “the MAC protocol data unit does not include data that can be transmitted”.

“The MAC protocol data unit does not include the MAC service data unit and the MAC protocol data unit includes the second MAC control element” means that the “MAC protocol data unit includes the MAC service data unit and the first It may mean “not including a MAC control element”.

When the release of semi-persistent scheduling is instructed and the fourth parameter skipUplinkTxSPS is not set, the terminal device 1 clears the set grant.

When the release of semi-persistent scheduling is instructed and the fourth parameter skipUplinkTxSPS is set, the terminal device 1 triggers SPS confirmation. When activation of semi-persistent scheduling is instructed and the fourth parameter skipUplinkTxSPS is set, the terminal device 1 triggers SPS confirmation.

If the SPS confirmation is triggered and not canceled and the terminal device 1 has uplink resources allocated for initial transmission in this subframe, the terminal device 1 To generate an SPS confirmation MAC control element and cancel the triggered SPS confirmation. Here, the uplink resource is a PUSCH resource. That is, the SPS confirmation MAC control element is a response to DCI for activation of the semi-persistent schedule. That is, the SPS confirmation MAC control element is a response to the DCI for the release of the semi-persistent schedule.

The SPS confirmation MAC control element may be specified by the MAC subheader. The SPS confirmation MAC control element may be 0 bits. The terminal device 1 clears the set grant after the first transmission of the SPS confirmation MAC control element triggered by the release of the semi-persistent schedule.

As described above, the terminal device 1 performs 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. When the fourth parameter skipUplinkTxSPS is not set, the terminal device 1 instructs the third parameter implicitReleaseAfter (number of empty transmissions before release (Number ofempty３transmissions before release)) set by the base station device 3 The set grant may be cleared on the basis of the parameter.

For example, in the terminal device 1, the fourth parameter skipUplinkTxSPS is not set, and the number of empty transmissions corresponding to the initial transmission in the continuous semi-persistent PUSCH is determined using the third parameter implicitReleaseAfter. When the indicated value (number of transmissions) is reached, the set grant may be cleared.

That is, when the fourth parameter skipUplinkTxSPS is not set, each of the terminal devices 1 is a MAC protocol data unit that does not include a MAC service data unit (that is, includes a zero MAC service data unit), The set grant may be cleared immediately after the third parameter implicitReleaseAfter 新しい corresponding to the number of consecutive new MAC protocol data units (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, when the fourth parameter skipUplinkTxSPS is not set, the terminal apparatus 1 uses the uplink resource (semi-persistent scheduling resource, PUSCH) allocated by the base station apparatus 3 based on the third parameter implicitReleaseAfter. Resource) may be released (cleared). That is, when the fourth parameter skipUplinkTxSPS is not set, the terminal device 1 is the uplink allocated by the base station device 3 on the basis of the third parameter implicitReleaseAfter in the same manner as clearing the set grant. You may release additional resources. Here, when the fourth parameter skipUplinkTxSPS is not set, the terminal device 1 clears the set grant when receiving the DCI used for instructing the release of the semi-persistent scheduling described above, and Alternatively, uplink resources may be released.

FIG. 6 is a diagram for explaining a grant clearing method set in the present embodiment.

As shown in FIG. 6, the terminal device 1 may receive DCI used for instructing 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, when there is no data that can be used for transmission, the terminal device 1 may perform empty transmission with a resource for semi-persistent scheduling.

Here, when the number of consecutive empty transmissions in the semi-persistent scheduling resource reaches the value (number of transmissions) set using the third parameter implicitReleaseAfter, the terminal device 1 is set. You may clear the 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 implicitReleaseAfterase, the terminal apparatus 1 Resources (semi-persistent scheduling resources) may be released. That is, the terminal device 1 may clear the set grant and / or release uplink resources based on the third parameter implicitReleaseAfter.

The terminal device 1 may clear the set grant when the HARQ parameter is changed. For example, when the HARQ parameter has been released (previously) and information indicating the setting of the HARQ parameter is received, the terminal device 1 may clear the set grant. For example, when the HARQ parameter is not set in advance (previously) and information indicating the setting of the HARQ parameter is received, the terminal device 1 may clear the set grant. For example, when the HARQ parameter is set in advance (previously) and information indicating the release of the HARQ parameter is received, the terminal device 1 may clear the set grant.

When the HARQ parameter is changed, the RRC of the terminal device 1 may instruct the MAC entity to perform a partial reset (partial reset). For example, if the HARQ parameter is not released or set in advance and information indicating the setting of the HARQ parameter is received, the RRC of the terminal device 1 instructs the MAC entity to perform partial reset (partial reset). May be. For example, when HARQ parameters are set in advance and information indicating release of HARQ parameters is received, the RRC of the terminal device 1 instructs the MAC entity to perform partial reset (partial reset). Also good. When the MAC entity requests a partial reset of the MAC entity for the serving cell by an upper layer (RRC), the MAC entity clears the grant set for the serving cell.

Hereinafter, a method for specifying the HARQ process related to the subframe by the HARQ entity will be described. The HARQ entity passes the uplink grant to the identified HARQ process.

In synchronous HARQ, the HARQ entity specifies the HARQ process related to the subframe without using the information received from the base station apparatus 3. In synchronous HARQ, the HARQ process may be identified based on the subframe with which the uplink grant is associated. For example, in an FDD serving cell, multiple subframes {n + 8 · i} are associated with the same HARQ process. Here, n and i are integers. Here, the plurality of subframes {n + 8 · i} includes a subframe n, a subframe n + 8, a subframe n + 16, and the like.

In asynchronous HARQ, the HARQ process number may be specified using an uplink grant included in the PDCCH. Here, the uplink grant included in the PDCCH may include information on the HARQ process number. In asynchronous HARQ, if the uplink grant does not include information regarding the HARQ process number, the HARQ process number may be fixed (eg, 0).

In asynchronous HARQ, for the configured grant, the number of the HARQ process related to the subframe in which the configured grant occurs may be identified based at least on the SFN and subframe in which transmission on PUSCH is performed. . In the asynchronous HARQ, the number of the HARQ process related to the subframe in which the set grant occurs may be given based on the following Equation (2).

Here, in the number (2), SFN and subframe indicate an SFN and a subframe in which transmission on the PUSCH is performed, respectively. semiPersistSchedIntervalUL is the first parameter described above. numberOfConfUlSPS-Processes is the sixth parameter. The base station device 3 may transmit the sixth parameter numberOfConfUlSPS-Processes to the terminal device 1. For example, the base station apparatus 3 may transmit the sixth parameter numberOfConfUlSPS-Processes using an upper layer signal (for example, an RRC layer signal). The sixth parameter numberOfConfUlSPS-Processes indicates the number of HARQ processes configured for uplink semi-persistent scheduling.

Hereinafter, adaptive HARQ retransmission and non-adaptive HARQ retransmission will be described. Adaptive HARQ retransmission is also referred to as adaptive retransmission. Non-adaptive HARQ retransmission is also referred to as non-adaptive retransmission.

Adaptive retransmission is retransmission performed based on the PDCCH (uplink grant) received from the base station apparatus 3. Non-adaptive retransmissions are retransmissions that are performed based on the uplink grant that was previously used by the HARQ process.

When a PDCCH including an uplink grant instructing retransmission is received after the initial transmission for synchronous HARQ, the terminal apparatus 1 performs adaptive retransmission regardless of the HARQ feedback received using PHICH. May be.

For synchronous HARQ, if the PDCCH including the uplink grant is not received after the initial transmission, and the HARQ feedback received using PHICH indicates NACK, the terminal apparatus 1 performs non-adaptive retransmission. Also good. Here, the initial transmission may be an initial transmission based on a set uplink grant.

For synchronous HARQ, if the PDCCH including the uplink grant is not received after the initial transmission, and the HARQ feedback received using PHICH indicates ACK, the terminal device 1 performs HARQ transmission (initial transmission, re-transmission). Transmission) and the contents (data) of the HARQ buffer are retained.

The HARQ entity may determine whether to instruct the identified HARQ process to generate non-adaptive retransmissions based on at least some or all of the following elements A to D for synchronous HARQ: Good.
-Element A: Whether the uplink grant is a set grant-Element B: Whether the first parameter semiPersistSchedIntervalUL shorter than 10 subframes is set for the MAC entity-Element C: Identified HARQ Whether or not the process HARQ buffer is empty; element D: whether or not the state variable HARQ_FEEDBACK of the identified HARQ process is NACK For example, when the following condition A to condition D are satisfied for synchronous HARQ , The HARQ entity may instruct the identified HARQ process to generate non-adaptive retransmissions.
Condition A: Grant for which an uplink grant is set Condition B: First parameter semiPersistSchedIntervalUL shorter than 10 subframes is set for the MAC entity Condition C: HARQ of the specified HARQ process Condition D: The state variable HARQ_FEEDBACK of the identified HARQ process is NACK The fact that the uplink grant is set is a semi-persistent scheduling or the uplink Grants may be replaced with corresponding SPS C-RNTI. The fact that the uplink grant is not a grant may be replaced with the uplink grant being an uplink grant included in the PDCCH, or the uplink grant corresponding to C-RNTI.

When the uplink grant is a grant, the terminal device 1 considers that the NDI bit corresponding to the HARQ process is toggled. That is, the condition that the uplink grant is a set grant may include a condition that the NDI bit corresponding to the HARQ process is toggled.

If the HARQ entity requests an initial transmission or adaptive retransmission from the HARQ process, the HARQ process sets the state variable HARQ_FEEDBACK to NACK. If HARQ feedback for the transport block is received, the HARQ process sets the state variable HARQ_FEEDBACK to the received value (ACK, NACK).

When the first parameter semiPersistSchedIntervalUL shorter than 10 subframes is set, the fourth parameter skipUplinkTxSPS may always be set. That is, when the first parameter semiPersistSchedIntervalUL shorter than 10 subframes is set, the first parameter semiPersistSchedIntervalUL shorter than 10 subframes and the fourth parameter skipUplinkTxSPS may be set.

For synchronous HARQ, if condition A is satisfied and any of condition B to condition D is not satisfied, the HARQ entity may instruct the identified HARQ process to trigger initial transmission.

For synchronous HARQ, if condition A is satisfied, based on whether condition B to condition D are satisfied, the HARQ entity may instruct the specified HARQ process to perform initial transmission or non-adaptive retransmission.

The HARQ entity may determine whether to direct the specified HARQ process to generate non-adaptive retransmissions based on at least some or all of the following elements A to E for asynchronous HARQ: Good.
-Element A: Whether the uplink grant is a set grant-Element B: Whether the first parameter semiPersistSchedIntervalUL shorter than 10 subframes is set for the MAC entity-Element C: Identified HARQ Whether the process's HARQ buffer is empty; element D: whether the specified HARQ process state variable HARQ_FEEDBACK is NACK; element E: the fourth parameter skipUplinkTxSPS is set for the MAC entity For example, if the following conditions A and E are satisfied for asynchronous HARQ, the HARQ entity may instruct the specified HARQ process to generate non-adaptive retransmissions.
-Condition A: Grant for which an uplink grant is set-Condition E: The fourth parameter skipUplinkTxSPS is set for the MAC entity. In condition E, the length of the first parameter semiPersistSchedIntervalUL is from 10 subframes. It may be long or short. That is, the length relationship of the first parameter semiPersistSchedIntervalUL does not have to be in condition E.

For asynchronous HARQ, if condition A is satisfied and condition E is not satisfied, the HARQ entity may instruct the identified HARQ process to trigger initial transmission.

For asynchronous HARQ, if condition A is met, the HARQ entity may instruct the identified HARQ process to perform initial transmission or non-adaptive retransmission based on whether condition E is met .

HARQ feedback for uplink transmission is transmitted using PHICH. Here, uplink transmission may be PUSCH transmission or transport block transmission. For synchronous HARQ, HARQ feedback for uplink transmission may be transmitted using PHICH. For asynchronous HARQ, HARQ feedback for uplink transmission may not be transmitted.

The HARQ entity may determine whether HARQ feedback for uplink transmission is transmitted based on at least some or all of the following elements A to E for asynchronous HARQ. Here, whether HARQ feedback for uplink transmission is transmitted may be whether HARQ feedback for uplink transmission is received.
-Element A: Whether the uplink grant is a set grant-Element B: Whether the first parameter semiPersistSchedIntervalUL shorter than 10 subframes is set for the MAC entity-Element C: Identified HARQ Whether the process's HARQ buffer is empty; element D: whether the specified HARQ process state variable HARQ_FEEDBACK is NACK; element E: the fourth parameter skipUplinkTxSPS is set for the MAC entity For example, if the following conditions A and E are satisfied for asynchronous HARQ, HARQ feedback for uplink transmission may be transmitted.
Condition A: Grant for which an uplink grant is set Condition E: Fourth parameter skipUplinkTxSPS is set for the MAC entity Condition A is satisfied for asynchronous HARQ and Condition E is set If not satisfied, HARQ feedback for uplink transmission may not be transmitted.

For asynchronous HARQ, if condition A is met, the HARQ entity may determine whether HARQ feedback for uplink transmission is transmitted based on whether condition E is met.

If the uplink HARQ operation is asynchronous HARQ and the uplink grant corresponds to C-RNTI, HARQ feedback for uplink transmission may not be transmitted.

The terminal device 1 may perform PUSCH transmission (non-adaptive retransmission) in the subframe n + p when the NACK is received in the subframe n. When the terminal device 1 does not receive the ACK in the subframe n, the terminal device 1 may perform PUSCH transmission (non-adaptive retransmission) in the subframe n + p.

If the HARQ entity instructs the HARQ process to perform non-adaptive retransmission, the uplink HARQ operation is synchronous HARQ, and the state variable HARQ_FEEDBACK is set to ACK, the HARQ process transmits (non-adaptive retransmission). May not be generated.

If the HARQ entity instructs the HARQ process to perform non-adaptive retransmission, the uplink HARQ operation is synchronous HARQ, and the state variable HARQ_FEEDBACK is set to NACK, the HARQ process transmits (non-adaptive retransmission). May be generated.

If the HARQ entity directs the HARQ process to non-adaptive retransmission, the uplink HARQ operation is asynchronous HARQ, and the state variable HARQ_FEEDBACK is set to ACK, the HARQ process generates a transmission (non-adaptive retransmission). Transmission).

If the HARQ entity instructs the HARQ process to perform non-adaptive retransmission, the uplink HARQ operation is asynchronous HARQ, and the state variable HARQ_FEEDBACK is set to NACK, the HARQ process transmits (non-adaptive retransmission). May be generated.

If the uplink HARQ operation is asynchronous HARQ and the uplink grant corresponds to C-RNTI, non-adaptive retransmission may not be performed.

The base station apparatus 3 deactivates non-adaptive transmission of the transport block initially transmitted by the semi-persistent PUSCH using the DCI format (for example, DCI format 0, DCI format 0D) for the uplink. You may instruct | indicate with respect to the terminal device 1. FIG.

Here, if the verification is successful, the terminal apparatus 1 indicates that the received DCI format is a valid instruction to deactivate the non-adaptive transmission of the transport block initially transmitted by the semi-persistent PUSCH. May be considered (may be recognized). If the verification is not successful, the terminal device 1 may discard (clear) this DCI format.

That is, the DCI format may be used for instructing deactivation of non-adaptive transmission of a transport block initially transmitted by a semi-persistent PUSCH.

FIG. 7 is a diagram showing an example of a special field for deactivation of non-adaptive transmission of a transport block initially transmitted by the semi-persistent PUSCH in the present embodiment. As shown in FIG. 7, a plurality of fields may be defined for deactivation of non-adaptive transmission of a transport block initially transmitted with semi-persistent PUSCH. In addition, a predetermined value (which may be a specific value) set in each of a plurality of fields is defined in order to deactivate non-adaptive transmission of transport blocks initially transmitted by semi-persistent PUSCH. Also good.

As shown in FIG. 7, for example, the DCI format for the uplink (for example, DCI format 0, DCI format 0D) is used for deactivation of non-adaptive transmission of transport blocks initially transmitted with semi-persistent PUSCH. In this case, the information on the TPC command for the scheduled PUSCH (TPC （command for scheduled PUSCH) included in the DCI format for the uplink is set to '11', and information on the cyclic shift for the DMRS (Cyclic shift DMRS ) Field is set to '111', the MCS and redundancy version information (Modulation and coding scheme and redundancy version) field is set to '11111', and resource block allocation Field of the fine hopping resource allocation information about (Resource block assignment and hopping resource allocation) may be set to all '1'.

One DCI format used for deactivation of non-adaptive transmission of transport blocks initially transmitted with semi-persistent PUSCH may correspond to one HARQ process.

In the case of DCI format 0D including information on the HARQ process number, the HARQ process corresponding to DCI format 0D used for deactivation of non-adaptive transmission of the transport block initially transmitted by the semi-persistent PUSCH is the HARQ process. It may be given based on information about the number.

In the case of DCI format 0 that does not include information on the HARQ process number, the HARQ process to which the DCI format 0 used for deactivation of non-adaptive transmission of the transport block initially transmitted by the semi-persistent PUSCH corresponds to the DCI Format 0 may be provided based at least on the received subframe.

The terminal device 1 may pass ACK to the MAC entity when the deactivation of the non-adaptive transmission of the transport block initially transmitted by the semi-persistent PUSCH is successful, and the MAC entity is specified. ACK may be set to a state variable HARQ_FEEDBACK of the HARQ process. That is, the instruction to deactivate the non-adaptive transmission of the transport block initially transmitted with the semi-persistent PUSCH may be a response to the transport block initially transmitted with the semi-persistent PUSCH.

The terminal device 1 (HARQ process) may perform non-adaptive retransmission of the transport block until it detects a response to the transport block initially transmitted with the semi-persistent PUSCH. Here, the response may be a DCI format indicating a response to the transport block initially transmitted by the semi-persistent PUSCH, or HARQ feedback indicating ACK.

The terminal device 1 (HARQ process) may perform initial transmission based on the set grant after detecting a response to the transport block initially transmitted by the semi-persistent PUSCH.

Describes operations related to HARQ buffer flushing. The maximum number of transmissions (maximum number of transmissions) may be set for synchronous HARQ. The maximum number of transmissions may be the maximum number of retransmissions. The seventh parameter maxHARQ-Tx indicates the maximum number of transmissions. The base station device 3 may transmit the seventh parameter maxHARQ-Tx to the terminal device 1. For example, the base station apparatus 3 may transmit the seventh parameter maxHARQ-Tx using an upper layer signal (for example, an RRC layer signal). If the HARQ entity requests an initial transmission from the HARQ process and the uplink HARQ operation is synchronous HARQ, the HARQ process may set the state variable CURRENT_TX_NB to 0. If the HARQ entity requests a retransmission (adaptive retransmission, non-adaptive retransmission) to the HARQ process and the uplink HARQ operation is synchronous HARQ, the HARQ process may increment the state variable CURRENT_TX_NB by one. If the uplink HARQ operation is synchronous HARQ and the state variable CURRENT_TX_NB is a predetermined value, the HARQ process may flush the HARQ buffer. Here, the predetermined value may be one smaller than the maximum number of transmissions.

When the uplink HARQ operation is asynchronous HARQ, the terminal apparatus 1 (HARQ process, HARQ entity) applies the operation related to the flushing of the HARQ buffer based at least on some or all of the following elements A2 to E: You may decide whether to do it.
Element A2: whether or not the uplink grant related to the initial transmission is a set grant. Element B: whether or not the first parameter semiPersistSchedIntervalUL shorter than 10 subframes is set for the MAC entity. Element C Whether the HARQ buffer of the identified HARQ process is empty; element D: whether the state variable HARQ_FEEDBACK of the identified HARQ process is NACK; element E: the fourth parameter for the MAC entity Whether skipUplinkTxSPS is set For example, if the uplink HARQ operation is asynchronous HARQ, and if the following conditions A2 and E are satisfied, the HARQ entity may instruct the specified HARQ process to generate non-adaptive retransmissions Good.
Condition A2: Grant for which an uplink grant related to initial transmission is set Condition E: Fourth parameter skipUplinkTxSPS is set for the MAC entity An uplink grant related to initial transmission is set Being a grant may be replaced by being a semi-persistent scheduling.

When the uplink HARQ operation is asynchronous HARQ and the condition A2 is not satisfied, the operation related to the HARQ buffer flush may not be applied.

When the uplink HARQ operation is asynchronous HARQ, the condition A2 is satisfied, and the condition E is not satisfied, the operation related to the HARQ buffer flush may not be applied.

If the uplink HARQ operation is asynchronous HARQ and condition A is met, the HARQ entity may send an initial transmission or non-adaptive retransmission to the identified HARQ process based on whether condition E is met. May be indicated.

If the uplink HARQ operation is asynchronous HARQ and the state variable CURRENT_TX_NB is a predetermined value, the HARQ process may not flush the HARQ buffer and do not perform non-adaptive retransmissions; and The contents (data) of the HARQ buffer may be held. Adaptive retransmission may be applied when the uplink HARQ operation is asynchronous HARQ and the state variable CURRENT_TX_NB is equal to or greater than a predetermined value. Here, the predetermined value may be one smaller than the maximum number of transmissions.

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

FIG. 8 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 medium access control layer processing unit 1012, 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: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: RLC) layer, and radio resource control. Process the (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 device. 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.

The medium access control layer processing unit 1012 included in the upper layer processing unit 101 performs processing of a medium access control (MAC: “Medium” Access ”Control) layer. The medium access control layer processing unit 1012 performs processing of the MAC entity, the HARQ entity, and the first entity.

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.

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

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 Output to the unit 101.

Also, 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), removes unnecessary frequency components, and reduces the signal level. The amplification level is controlled so as to be properly maintained, and quadrature demodulation is performed based on the in-phase component and the quadrature component of the received signal, and the quadrature demodulated analog signal is converted into a digital signal. The radio reception unit 1057 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal, and performs a fast Fourier transform (FFT) on the signal from which the CP has been removed to obtain a frequency domain signal. Extract.

Also, the demultiplexing unit 1055 separates 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.

Also, the demodulating unit 1053 multiplies the PHICH by a corresponding code and synthesizes it, demodulates the synthesized signal using the BPSK (Binary Phase Shift Shift Keying) modulation method, and outputs it to the decoding unit 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, and the like, and outputs the result 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 upper 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. Modulation section 1073 determines the number of spatially multiplexed data sequences based on information used for PUSCH scheduling, and transmits the same PUSCH by using MIMO (Multiple Input Multiple Multiple Output) SM (Spatial Multiplexing). A plurality of uplink data are mapped to a plurality of sequences, and precoding is performed on the sequences.

The uplink reference signal generator 1079 also identifies a physical layer cell identifier (physicalphylayer cell identity: PCI, Cell ID, etc.) for identifying the base station apparatus 3, a bandwidth for arranging the uplink reference signal, and 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 a discrete Fourier transform (Discrete-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.

Also, the wireless transmission unit 1077 generates an SC-FDMA symbol by performing inverse fast Fourier transform (Inverse Fast Transform: IFFT) on the multiplexed signal, and adds a CP to the generated SC-FDMA symbol. Generates a band digital signal, converts the baseband digital signal to an analog signal, removes excess frequency components using a low-pass filter, upconverts to a carrier frequency, amplifies the power, and transmits and receives antennas It outputs to the part 109 and transmits.

FIG. 9 is a schematic block diagram showing the configuration of the base station apparatus 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 upper layer processing unit 301 includes a radio resource control unit 3011, a medium access control layer processing unit 3012, 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: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: RLC) layer, 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.

Further, the radio resource control unit 3011 included in the higher 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. The radio resource control unit 3011 may set various setting information / parameters for each terminal apparatus 1 via higher layer signals. That is, the radio resource control unit 1011 transmits / broadcasts information indicating various setting information / parameters. The radio resource control unit 3011 is also referred to as a setting unit 3011.

The medium access control layer processing unit 3012 included in the upper layer processing unit 301 performs processing of a medium access control (MAC: “Medium” Access ”Control) layer. The medium access control layer processing unit 3012 performs processing of the MAC entity, the HARQ entity, and the first entity.

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.

Also, the SPS control unit 3015 provided 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-conversion: 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.

Further, the wireless reception unit 3057 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal. The radio reception unit 3057 performs fast Fourier transform (FFT) on the signal from which the CP is removed, extracts a frequency domain signal, and outputs the signal to the demultiplexing unit 3055.

Also, the demultiplexing unit 1055 separates 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 demodulation unit 3053 performs inverse discrete Fourier transform (Inverse Discrete Fourier Transform: IDFT) on the PUSCH to obtain modulation symbols, and BPSK (Binary Phase Shift Keying), QPSK, The received signal is demodulated using a predetermined modulation method such as 16QAM, 64QAM, or the like, or the modulation method notified by the own device in advance to each terminal device 1 using the uplink grant. The demodulator 3053 uses the MIMO SM based on the number of spatially multiplexed sequences notified in advance to each terminal device 1 using an uplink grant and information indicating precoding 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 performs an inverse fast Fourier transform (Inverse Fast Fourier Transform: IFFT) on the multiplexed modulation symbol or the like to generate an OFDM symbol, adds a CP to the generated OFDM symbol, and adds a baseband digital signal 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 (up 、 convert), power amplified, and output to a transmission / reception antenna unit 309 To send.

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 is based on a MAC protocol based at least on whether a receiving unit that receives an upper layer parameter skipUplinkTxSPS and whether the upper layer parameter skipUplinkTxSPS is set. A medium access control layer processing unit for determining whether to generate a data unit, wherein the medium access control layer processing unit is configured to perform non-adaptive replay based at least on whether or not the upper layer parameter skipUplinkTxSPS is set. Decide whether to perform the transmission. Here, when the uplink HARQ operation is asynchronous, the medium access control layer processing unit determines whether to perform non-adaptive retransmission based on at least whether the higher layer parameter skipUplinkTxSPS is set. You may decide.

(2) In the first aspect of this embodiment, when the uplink HARQ operation is synchronous, the medium access control layer processing unit performs semi-transmission regardless of whether or not the upper layer parameter skipUplinkTxSPS is set. Determine whether to perform non-adaptive retransmissions of persistently scheduled transport blocks.

(3) In the first aspect of the present embodiment, the medium access control layer processing unit is a grant in which the upper layer parameter skipUplinkTxSPS is set and an uplink grant is set, and the MAC If the protocol data unit does not include a MAC service data unit but only includes a MAC CE for padding BSR or periodic BSR, the MAC protocol data unit is not generated. In the first aspect of the present embodiment, the medium access control layer processing unit is a grant in which the upper layer parameter skipUplinkTxSPS is set, an uplink grant is set, and a MAC protocol data unit Does not generate a MAC service data unit and a MAC CE other than a MAC CE for padding BSR or periodic BSR.

(4) A second aspect of the present embodiment is a base station apparatus 3, a transmission unit that transmits an upper layer parameter skipUplinkTxSPS used by a terminal apparatus to determine whether to generate a MAC protocol data unit; A reception unit that receives non-adaptive retransmissions and whether or not non-adaptive retransmissions are performed by the terminal device based at least on whether the upper layer parameter skipUplinkTxSPS is set for the terminal device A medium access control layer processing unit to be determined. Here, the medium access control layer processing unit performs non-adaptive retransmission based on at least whether or not the upper layer parameter skipUplinkTxSPS is set for the terminal apparatus when uplink HARQ operation is asynchronous. May be determined by the terminal device.

(5) In the second aspect of the present embodiment, the medium access control layer processing unit determines whether the upper layer parameter skipUplinkTxSPS is set for the terminal apparatus when uplink HARQ operation is synchronous. Regardless, it is determined whether non-adaptive retransmission of semi-persistently scheduled transport blocks is performed by the terminal device.

(6) In the second aspect of the present embodiment, the upper layer parameter skipUplinkTxSPS is set for the terminal device, and an uplink grant is set, and a MAC protocol data unit Does not include a MAC service data unit and includes a MAC CE for padding BSR or periodic BSR, the MAC protocol data unit is not generated by the terminal device.

(7) A third aspect of the present embodiment is the terminal device 1, and includes a reception unit that receives an upper layer information instructing setting or release of an upper layer parameter skipUplinkTxSPS, an uplink grant, and the uplink A medium access control layer processing unit that stores a link grant as a set grant and determines whether an uplink HARQ operation is synchronous or asynchronous based at least on whether the upper layer parameter skipUplinkTxSPS is set; The medium access control layer processing unit, when the upper layer parameter skipUplinkTxSPS is set in advance (previously), and when receiving the upper layer information indicating the release of the upper layer parameter skipUplinkTxSPS, Clear the set grant.

(8) In the third aspect of the present embodiment, the medium access control layer processing unit instructs the setting of the upper layer parameter skipUplinkTxSPS in which the upper layer parameter skipUplinkTxSPS is not set in advance (previously). When the upper layer information is received, the set grant is cleared.

(9) In the third aspect of the present embodiment, the medium access control layer processing unit instructs that the upper layer parameter skipUplinkTxSPS has been previously released and the upper layer parameter skipUplinkTxSPS is set. When the upper layer information is received, the set grant is cleared.

(10) The fourth aspect of the present embodiment is the base station apparatus 3, which is stored by the terminal apparatus as upper layer information instructing the setting or release of the upper layer parameter skipUplinkTxSPS and a grant to be set. A transmission unit for transmitting an uplink grant, and a medium access control layer processing unit for determining whether an uplink HARQ operation is synchronous or asynchronous based at least on whether the upper layer parameter skipUplinkTxSPS is set for the terminal device The medium access control layer processing unit includes the upper layer parameter skipUplinkTxSPS set in advance for the terminal device and instructs the release of the upper layer parameter skipUplinkTxSPS. When higher layer information is transmitted to the terminal device, the set grant is changed to the terminal device. It is considered to be cleared by setting.

(11) In the third aspect of the present embodiment, the medium access control layer processing unit does not set the upper layer parameter skipUplinkTxSPS in advance for the terminal device, and When the upper layer information instructing the setting of the parameter skipUplinkTxSPS is transmitted to the terminal device, it is considered that the set grant is cleared by the terminal device.

(12) In the third aspect of the present embodiment, the medium access control layer processing unit has the upper layer parameter skipUplinkTxSPS released in advance in the terminal device, and the upper layer parameter skipUplinkTxSPS When the upper layer information instructing the setting is transmitted to the terminal device, the set grant is considered to be cleared by the terminal device.

This makes it possible to transmit uplink data efficiently.

The base station apparatus 3 related to one aspect of the present invention and the program operating in the terminal apparatus 1 control a CPU (Central Processing Unit) and the like so as to realize the functions of the above-described embodiments related to one aspect of the present invention It may be a program (a program that causes a computer to function). Information handled by these devices is temporarily stored in RAM (Random Access Memory) during 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.

In addition, you may make it implement | achieve the terminal device 1 in the embodiment mentioned above, and a part of base station apparatus 3 with 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.

Note that the “computer system” here is a computer system built in the terminal device 1 or the base station device 3 and includes hardware such as an OS and 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 or 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 this case, a volatile memory inside a computer system that serves as a server or a client may be included 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.

Also, the base station device 3 in the above-described embodiment can 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 EUTRAN (Evolved Universal Terrestrial Radio Access Network). In addition, the base station device 3 in the above-described embodiment may have a part or all of the functions of the upper node for the eNodeB.

In addition, a 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.

As described above, 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. In addition, one aspect of the present invention can be modified in various ways within the scope of the claims, and the technical aspects of the present invention also relate to embodiments obtained by appropriately combining technical means disclosed in different embodiments. Included in the range. 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.

One embodiment of the present invention is used in, for example, a communication system, a communication device (for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), a program, or the like. be able to.

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 1012 Medium access Control layer processing unit 1013 Scheduling information interpretation unit 1015 SPS control unit 3011 Radio resource control unit 3012 Medium access control layer processing unit 3013 Scheduling unit 3015 SPS control unit

Claims

A higher-layer information that instructs setting or release of higher-layer parameters, and a reception unit that receives an uplink grant; and
A medium access control layer processing unit that stores the uplink grant as a set grant and determines whether an uplink HARQ operation is synchronous or asynchronous based at least on whether the higher layer parameter is set; With
The medium access control layer processing unit is set when the upper layer parameters are set in advance and the upper layer information instructing release of the upper layer parameters is received. Terminal device that clears the grant.
The medium access control layer processing unit is set when the upper layer parameter is not set in advance and the upper layer information instructing setting of the upper layer parameter is received. The terminal device according to claim 1, wherein the grant is cleared.
The medium access control layer processing unit is set when the upper layer parameter has been released in advance and the upper layer information instructing the setting of the upper layer parameter is received. The terminal device according to claim 1, wherein the grant is cleared.
Information of an upper layer instructing setting or release of an upper layer parameter, and a transmission unit that transmits an uplink grant stored by a terminal device as a set grant;
A medium access control layer processing unit that determines whether an uplink HARQ operation is synchronous or asynchronous based on at least whether the higher layer parameter is set for the terminal device;
The medium access control layer processing unit has the upper layer parameters set in advance for the terminal device, and the upper layer information instructing the release of the upper layer parameters is transmitted to the terminal device. The base station apparatus considers that the set grant is cleared by the terminal apparatus.
The medium access control layer processing unit transmits the upper layer information indicating that the upper layer parameter is not set in advance to the terminal device and instructs setting of the upper layer parameter. The base station apparatus according to claim 4, wherein, when transmitted to an apparatus, the set grant is considered to be cleared by the terminal apparatus.
The medium access control layer processing unit sends the upper layer information to the terminal device, in which the upper layer parameter has been released in advance in the terminal device, and the upper layer parameter is instructed to set the upper layer parameter. The base station apparatus according to claim 4, wherein when transmitting, the set grant is considered to be cleared by the terminal apparatus.
A communication method used for a terminal device,
Receive upper layer information instructing to set or release upper layer parameters and uplink grant,
Store the uplink grant as a set grant,
Determining whether an uplink HARQ operation is synchronous or asynchronous based at least on whether the higher layer parameters are set;
A communication method for clearing the set grant when the upper layer parameter is set in advance and the upper layer information instructing the release of the upper layer parameter is received.
A communication method used for a base station device,
Sends the upper layer information instructing the setting or release of the upper layer parameter, and the uplink grant stored by the terminal device as the set grant,
Determining whether an uplink HARQ operation is synchronous or asynchronous based at least on whether the higher layer parameters are configured for the terminal device;
The upper layer parameters are set in advance for the terminal device, and the upper layer information instructing release of the upper layer parameters is transmitted to the terminal device. A communication method that assumes that a grant is cleared by the terminal device.
A receiver for receiving higher layer parameters;
A medium access control layer processing unit for determining whether to generate a MAC protocol data unit based at least on whether the upper layer parameter is set,
When the uplink HARQ operation is asynchronous, the medium access control layer processing unit determines whether to perform non-adaptive retransmission based at least on whether the higher layer parameter is set .
When the uplink HARQ operation is synchronous, the medium access control layer processing unit performs non-adaptive retransmission of the semi-persistent scheduled transport block regardless of whether the higher layer parameter is set or not. The terminal device according to claim 9, which determines whether to execute.
The medium access control layer processing unit is a grant in which the parameters of the upper layer are set and an uplink grant is set, and a MAC protocol data unit does not include a MAC service data unit, and a padding BSR The terminal device according to claim 9, wherein the MAC protocol data unit is not generated when a MAC CE for periodic BSR is included.
A transmitter for transmitting higher layer parameters used by the terminal device to determine whether to generate a MAC protocol data unit;
A receiver for receiving non-adaptive retransmissions;
If uplink HARQ operation is asynchronous, determine whether non-adaptive retransmission is performed by the terminal device based at least on whether the higher layer parameters are set for the terminal device A base station apparatus comprising: a medium access control layer processing unit;
When the uplink HARQ operation is synchronous, the medium access control layer processing unit performs the semi-persistent scheduled transport block regardless of whether the higher layer parameter is set for the terminal device. The base station apparatus according to claim 12, wherein it is determined whether non-adaptive retransmission of is performed by the terminal apparatus.
The higher layer parameter is set for the terminal device, and an uplink grant is set, and the MAC protocol data unit does not include the MAC service data unit, and the padding BSR or periodic The base station apparatus according to claim 12, wherein the MAC protocol data unit is not generated by the terminal apparatus when the MAC CE for BSR is included.
A communication method used for a terminal device,
Receive higher layer parameters,
Determine whether to generate a MAC protocol data unit based at least on whether the upper layer parameter is set, and whether the upper layer parameter is set when uplink HARQ operation is asynchronous A communication method for determining whether to perform non-adaptive retransmission based at least on the basis of.
A communication method used for a base station device,
Sending higher layer parameters used by the terminal device to determine whether to generate a MAC protocol data unit;
Receive non-adaptive retransmissions,
If uplink HARQ operation is asynchronous, determine whether non-adaptive retransmission is performed by the terminal device based at least on whether the higher layer parameters are set for the terminal device Communication method.