WO2020032743A1

WO2020032743A1 - Method for transceiving signal in wireless communication system and appartus therefor

Info

Publication number: WO2020032743A1
Application number: PCT/KR2019/010162
Authority: WO
Inventors: 박창환; 김선욱; 박한준; 윤석현
Original assignee: 엘지전자 주식회사
Priority date: 2018-08-09
Filing date: 2019-08-09
Publication date: 2020-02-13

Abstract

The present invention relates to a method for transceiving signals on the basis of 2-step resource allocation in a wireless communication system supporting a non-licensed band and an apparatus therefor, and, more particularly, to the method comprising the steps of: transceiving capability information of user equipment; transceiving first downlink control information (DCI) which instructs a first resource; transceiving second DCI which instructs a second resource; and transceiving an uplink signal on the basis the first DCI and the second DCI.

Description

Method for transmitting and receiving signals in a wireless communication system and apparatus therefor

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving signals in an unlicensed band.

Mobile communication systems have been developed to provide voice services while ensuring user activity. However, the mobile communication system has expanded not only voice but also data service.As a result of the explosive increase in traffic, shortage of resources and users demand faster services, a more advanced mobile communication system is required. .

The requirements of the next generation of mobile communication systems can support the massive explosive data traffic, the dramatic increase in transmission rate per user, the large increase in the number of connected devices, the very low end-to-end latency, and the high energy efficiency. It should be possible. For this purpose, Dual Connectivity, Massive Multiple Input Multiple Output (MIMO), In-band Full Duplex, Non-Orthogonal Multiple Access (NOMA), Super Wide Various technologies such as wideband support and device networking have been studied.

It is an object of the present invention to provide a method and apparatus for two-step resource allocation in an unlicensed band.

Another object of the present invention is to provide a method and apparatus for efficient resource mapping based on two-step resource allocation in an unlicensed band.

It is also an object of the present invention to provide a method and apparatus for configuring and signaling control information for two-stage resource allocation.

Technical problems to be achieved in the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

In a first aspect of the present invention, there is provided a method for transmitting an uplink signal by a user equipment (UE) based on two-step resource allocation in a wireless communication system supporting an unlicensed band. The method comprises the steps of: transmitting capability information of the user equipment to a base station; Receiving first downlink control information (DCI) indicating a first resource from the base station; Receiving a second DCI indicating a second resource from the base station; And transmitting the uplink signal to the base station based on the first DCI and the second DCI, wherein the capability information is a minimum required between uplink transmission associated with the second DCI and the second DCI. Information about a processing time (minimum processing time), wherein the second DCI indicates a scheduling delay between the second DCI and the second resource, and between the second DCI and the second resource. When the scheduling delay is not greater than the minimum processing time, transmitting the uplink signal may include generating the uplink signal based on the first DCI, based on the first resource and the second resource. It may include transmitting the generated uplink signal.

In a second aspect of the present invention, there is provided a user equipment (UE) configured to transmit an uplink signal based on 2-step resource allocation in a wireless communication system supporting an unlicensed band, The user device includes a radio frequency (RF) transceiver; And a processor operatively connected to the RF transceiver, wherein the processor controls the RF transceiver to transmit capability information of the user equipment to a base station and indicates a first resource from the base station. Receives first downlink control information (DCI), receives a second DCI indicating a second resource from the base station, and receives the uplink signal based on the first DCI and the second DCI. Configured to transmit to the base station, wherein the capability information includes information about a minimum processing time required between the second DCI and uplink transmission associated with the second DCI, wherein the second DCI is Indicating a scheduling delay between the second DCI and the second resource, wherein the scheduling delay between the second DCI and the second resource is When not larger than the small processing time, transmitting the uplink signal may include generating the uplink signal based on the first DCI, and generating the uplink based on the first resource and the second resource. And transmitting the signal.

In a third aspect of the invention, an apparatus for a user equipment (UE) configured to operate in a wireless communication system is provided, the apparatus comprising: a memory including instructions; And a processor coupled to the memory in operation, wherein the processor is configured to execute the instructions to perform specific operations, the specific operations comprising: transmitting capability information of the user equipment to a base station; Receiving first downlink control information (DCI) indicating a first resource from the base station, receiving a second DCI indicating a second resource from the base station, the first DCI and the And transmitting the uplink signal to the base station based on a second DCI, wherein the capability information is at a minimum processing time required between the second DCI and uplink transmission associated with the second DCI. Information on the second DCI, the second DCI indicating a scheduling delay between the second DCI and the second resource; When the scheduling delay between the second DCI and the second resource is not greater than the minimum processing time, transmitting the uplink signal may include generating the uplink signal based on the first DCI, and generating the uplink signal. The method may include transmitting the generated uplink signal based on one resource and the second resource.

Preferably, when the scheduling delay between the second DCI and the second resource is greater than the minimum processing time, transmitting the uplink signal comprises generating the uplink signal based on the first DCI. And transmitting the generated uplink signal based on the first resource, ignoring the second resource.

Preferably, the second resource is continuously allocated prior to the first resource in the time domain, and transmitting the generated uplink signal based on the first resource and the second resource is the first DCI. Mapping an uplink signal generated based on the first resource to the first resource, mapping a signal generated by successively extracting a circular buffer to the second resource, and transmitting the mapped signals to the base station. can do.

Preferably, the second resource may be allocated to a location different from the first resource in the frequency domain and to a location that is the same as or partially overlapped with the first resource in the time domain.

Advantageously, transmitting the generated uplink signal based on the first resource and the second resource comprises: mapping an uplink signal generated based on the first DCI to the first resource; The method may include mapping an uplink signal generated based on a first DCI to the second resource, and transmitting the mapped signals to the base station.

Preferably, the uplink signal generated based on the first DCI may be mapped to the first resource and the second resource in a frequency priority mapping manner.

Advantageously, said first DCI also indicates a starting symbol position of said first resource and the number of symbols of said first resource, and said second DCI also indicates a starting symbol position of said second resource and of said second resource. The number of symbols is indicated, and the number of symbols of the second resource may be limited not to exceed the start symbol position of the first resource in the slot including the first resource.

Preferably, the uplink signal may be transmitted through a physical uplink shared channel (PUSCH).

Preferably, the first DCI and the second DCI may be received through respective physical downlink control channels (PDCCHs).

In a fourth aspect of the present invention, a method for allocating resources based on 2-step resource allocation in a wireless communication system supporting an unlicensed band is provided, and the method includes user equipment. Receiving capability information from the UE; Transmitting first downlink control information (DCI) indicating a first resource to the user device; And transmitting a second DCI indicating a second resource to the user device within a channel occupancy time (COT) of the base station, wherein the capability information includes the second DCI and the second DCI. Information about a minimum processing time required between uplink transmissions associated with the second DCI, the second DCI indicating a scheduling delay between the second DCI and the second resource, The scheduling delay between the second DCI and the second resource may be set not to be greater than the minimum processing time.

In a fifth aspect of the present invention, a base station configured to allocate resources based on two-step resource allocation in a wireless communication system supporting an unlicensed band is provided, and the base station is a radio frequency (RF) transceiver. (transceiver); And a processor operatively connected with the RF transceiver, wherein the processor controls the RF transceiver to receive capability information from a user equipment (UE), and transmits the first information to the user equipment. Transmitting a second downlink control information (DCI) indicating a resource and indicating a second resource to the user equipment within a channel occupancy time (COT) of the base station; And the capability information includes information regarding a minimum processing time required between the second DCI and an uplink transmission associated with the second DCI, wherein the second DCI is the second DCI. Indicating a scheduling delay between the DCI and the second resource, wherein the scheduling delay between the second DCI and the second resource is not greater than the minimum processing time. Settings can be.

In a sixth aspect of the present invention, there is provided an apparatus for a base station configured to operate in a wireless communication system, the apparatus comprising: a memory including instructions; And a processor coupled during operation to the memory, wherein the processor is configured to execute the instructions to perform specific operations, wherein the specific operations receive capability information from a user equipment (UE). And transmitting first downlink control information (DCI) indicating a first resource to the user equipment, and transmitting the first downlink control information (DCI) to the user equipment within a channel occupancy time (COT) of the base station. And transmitting a second DCI indicating a second resource, wherein the capability information includes information about a minimum processing time required between the second DCI and uplink transmission associated with the second DCI. And the second DCI indicates a scheduling delay between the second DCI and the second resource, and between the second DCI and the second resource. Kane scheduling delay can be set to be greater than the minimum processing time.

Preferably, the second resource may be allocated continuously prior to the first resource in the time domain.

Preferably, the first DCI also indicates a starting symbol position of the first resource and the symbol number of the first resource, the second DCI also indicates a starting symbol position of the second resource and the symbol number of the second resource, The number of symbols of the second resource may be limited not to exceed the start symbol position of the first resource in the slot including the first resource.

Preferably, the first DCI and the second DCI may be transmitted through respective physical downlink control channels (PDCCHs).

According to the present invention, a signal can be efficiently transmitted and received based on a two-stage resource allocation in an unlicensed band.

In addition, according to the present invention, resource mapping can be efficiently performed based on a two-stage resource allocation in an unlicensed band.

In addition, according to the present invention, it is possible to efficiently configure and signal control information for two-stage resource allocation.

The effect obtained in the present invention is not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. .

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description in order to provide a thorough understanding of the present invention, provide embodiments of the present invention and together with the description, describe the technical features of the present invention.

1 and 2 illustrate a radio frame structure of the LTE system.

3 illustrates a slot structure of an LTE system.

4 illustrates a radio frame structure of an NR system.

5 illustrates a slot structure of an NR system.

6 illustrates physical channels and general signal transmission used in a 3GPP system.

7 and 8 illustrate the transmission timing of a physical channel.

9 illustrates a wireless communication system supporting an unlicensed band.

10 illustrates a method of occupying resources in an unlicensed band.

11 is a flowchart illustrating a channel access procedure of a terminal for uplink signal transmission.

12 illustrates a flowchart of the operation of a terminal and a base station in accordance with the present invention.

13 to 17 illustrate a system and a communication apparatus to which the methods proposed by the present invention can be applied.

In the present specification, downlink (DL) means communication from a base station to a terminal, and uplink (UL) means communication from a terminal to a base station. In downlink, a transmitter may be part of a base station, and a receiver may be part of a terminal. In uplink, a transmitter may be part of a terminal, and a receiver may be part of a base station. A base station (BS) is a wireless device that communicates with a terminal and may be referred to by other terms such as an evolved Node-B (eNB), a General Node-B (gNB), a base transceiver system (BTS), an access point (AP), and the like. A terminal may be referred to in other terms such as user equipment (UE), mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), wireless device, and the like.

The techniques described herein can be used in various radio access systems such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, and the like. CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), or the like. UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA and LTE-A (Advanced) / LTE-A pro is an evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) or 5G is an evolution of 3GPP LTE / LTE-A / LTE-A pro.

For clarity, the description will be based on 3GPP communication systems (eg, LTE-A, NR), but the technical spirit of the present invention is not limited thereto. LTE refers to technology after 3GPP TS (Technical Specification) 36.xxx Release 8. In detail, the LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and the LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro. 3GPP 5G means technology after TS 36.xxx Release 15, and 3GPP NR means technology after TS 38.xxx Release 15. "xxx" means standard document detail number. LTE / LTE-A / LTE-A Pro / 5G may be collectively referred to as LTE system. LTE / NR may be collectively referred to as 3GPP system. Background, terminology, abbreviations, and the like used in the description of the present invention may refer to the matters described in the standard documents published prior to the present invention. For example, see the following document:

In the present specification, the technical features of the present invention are described based on the 3GPP NR system, but the present invention may be similarly / similarly applied to the 3GPP LTE system.

3GPP LTE

36.211: Physical channels and modulation

36.212: Multiplexing and channel coding

36.213: Physical layer procedures

36.300: Overall description

36.304: User Equipment (UE) procedures in idle mode

36.331: Radio Resource Control (RRC)

3GPP NR

38.211: Physical channels and modulation

38.212: Multiplexing and channel coding

38.213: Physical layer procedures for control

38.214: Physical layer procedures for data

38.300: NR and NG-RAN Overall Description

38.304: User Equipment (UE) procedures in Idle mode and RRC Inactive state

36.331: Radio Resource Control (RRC) protocol specification

1 illustrates a radio frame structure of an LTE system. LTE supports frame type 1 for frequency division duplex (FDD), frame type 2 for time division duplex (TDD) and frame type 3 for unlicensed cell (UCell). In addition to the PCell (Primary Cell), up to 31 SCells (Secondary Cells) may be aggregated. Unless specifically stated, the operations described herein may be applied independently for each cell. In multi-cell merging, different frame structures can be used for different cells. In addition, time resources (eg, subframes, slots, and subslots) in the frame structure may be collectively referred to as a time unit (TU).

1 (a) illustrates frame type 1. The downlink radio frame is defined as ten 1 ms subframes (SFs). The subframe includes 14 or 12 symbols according to a cyclic prefix (CP). If a normal CP is used, the subframe includes 14 symbols. If extended CP is used, the subframe includes 12 symbols. The symbol may mean an OFDM (A) symbol or an SC-FDM (A) symbol according to a multiple access scheme. For example, the symbol may mean an OFDM (A) symbol in downlink and an SC-FDM (A) symbol in uplink. The OFDM (A) symbol is referred to as a Cyclic Prefix-OFDM (A) symbol, and the SC-FDM (A) symbol is a DFT-s-OFDM (A) (Discrete Fourier Transform-spread-OFDM) symbol. (A)) may be referred to as a symbol.

The subframe may be defined as one or more slots according to SCS (Subcarrier Spacing) as follows.

For SCS = 7.5 kHz or 15 kHz, subframe #i is defined as two 0.5ms slots # 2i and # 2i + 1 (i = 0-9).

When SCS = 1.25 kHz, subframe #i is defined as one 1ms slot # 2i.

When SCS = 15 kHz, subframe #i may be defined as six subslots.

1 (b) illustrates frame type 2. Frame type 2 consists of two half frames. The half frame includes 4 (or 5) general subframes and 1 (or 0) special subframes. The general subframe is used for uplink or downlink according to the UL-Downlink configuration. The subframe consists of two slots.

Table 1 illustrates a subframe configuration in a radio frame according to the UL-DL configuration.

In Table 1, D represents a DL subframe, U represents a UL subframe, and S represents a special subframe. The special subframe includes a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). DwPTS is used for initial cell search, synchronization or channel estimation at the terminal. UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal. The guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.

2 illustrates frame structure type 3.

Frame structure type 3 may be applied to operation on an unlicensed band. Although not limited to this, the frame structure type 3 may be applied only to the operation of a licensed assisted access (LAA) SCell having a normal CP. The frame has a length of 10 ms and is defined by ten 1 ms subframes. Subframe #i is defined as two consecutive slots # 2i and # 2i + 1. Each subframe in the frame may be used for downlink or uplink transmission or may be empty. The downlink transmission occupies one or more contiguous subframes (occupy) and starts at any point in the subframe and ends at the subframe boundary or DwPTS in Table 1. Uplink transmission occupies one or more consecutive subframes.

The structure of the above-described radio frame is merely an example, and the number of subframes included in the radio frame or the number of slots included in the subframe and the number of symbols included in the slot may be variously changed.

3 illustrates a slot structure of an LTE frame.

Referring to FIG. 3, a slot includes a plurality of symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain. The symbol may mean a symbol section. The slot structure may be represented by a resource grid composed of N ^{DL / UL} _RB × N ^RB _sc subcarriers and N ^{DL / UL} _symb symbols. Here, N ^DL _RB represents the number of RBs in the downlink slot, and N ^UL _RB represents the number of _RBs in the UL slot. N ^DL _RB and N ^UL _RB depend on the DL bandwidth and the UL bandwidth, respectively. N ^DL _symb represents the number of symbols in the DL slot, and N ^UL _symb represents the number of symbols in the UL slot. N ^RB _sc represents the number of subcarriers constituting the RB. The number of symbols in the slot can be variously changed according to the length of the SCS, CP. For example, one slot includes 7 symbols in the case of a normal CP, but one slot includes 6 symbols in the case of an extended CP.

RB is defined as N ^{DL / UL} _symb (e.g. 7) consecutive symbols in the time domain and N ^RB _sc (e.g. 12) consecutive subcarriers in the frequency domain. Here, the RB may mean a physical resource block (PRB) or a virtual resource block (VRB), and the PRB and the VRB may be mapped one-to-one. Two RBs, one located in each of two slots of a subframe, are called RB pairs. Two RBs constituting the RB pair have the same RB number (or also referred to as an RB index). A resource composed of one symbol and one subcarrier is called a resource element (RE) or tone. Each RE in a resource grid may be uniquely defined by an index pair (k, l) in a slot. k is an index given from 0 to N ^{DL / UL} _RB × N ^RB _sc −1 in the frequency domain, and l is an index given from 0 to N ^{DL / UL} _symb −1 in the time domain.

4 illustrates a radio frame structure of an NR system.

In the NR system, uplink and downlink transmission are composed of frames. The radio frame has a length of 10 ms and is defined as two 5 ms half-frames (HFs). The half-frame is defined by five 1 ms subframes (SFs). The subframe is divided into one or more slots, and the number of slots in the subframe depends on the subcarrier spacing (SCS). Each slot includes 12 or 14 OFDM (A) symbols according to a cyclic prefix (CP). When a normal CP is used, each slot includes 14 symbols. If extended CP is used, each slot includes 12 symbols. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or DFT-s-OFDM symbol).

Table 2 exemplarily shows that when the CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS.

* N ^slot _symb : Number of symbols in slot

* N ^{frame, u} _slot : Number of slots in the frame

* N ^{subframe, u} _slot : Number of slots in ^subframe

Table 3 illustrates that when the extended CP is used, the number of symbols per slot, the number of slots for each frame, and the number of slots for each subframe vary according to the SCS.

In the NR system, OFDM (A) numerology (eg, SCS, CP length, etc.) may be set differently among a plurality of cells merged into one UE. Accordingly, the (absolute time) section of a time resource (eg, SF, slot, or TTI) (commonly referred to as a time unit (TU) for convenience) composed of the same number of symbols may be set differently between merged cells.

5 illustrates a slot structure of an NR frame.

In an NR system, up to 400 MHz may be supported per one carrier. If a UE operating on such a wideband carrier always operates with a radio frequency (RF) module for the entire carrier, UE battery consumption may increase. Alternatively, when considering various use cases (e.g. eMBB, URLLC, mMTC, V2X, etc.) operating within a single wideband carrier, there are different pneumomorphologies (e.g. subcarrier spacing) for each frequency band within the carrier. Can be supported. Alternatively, the capability for the maximum bandwidth may vary for each UE. In consideration of this, the BS may instruct the UE to operate only in some bandwidths rather than the entire bandwidths of the wideband carriers, and this partial bandwidth is referred to as a bandwidth part (BWP). In the frequency domain, BWP is a subset of contiguous common resource blocks defined for the pneumonia μ _i in bandwidth part i on the carrier, and one pneumology (eg subcarrier spacing, CP length, slot / mini-slot). Duration) can be set.

The slot includes a plurality of symbols in the time domain. For example, in general, one slot includes 14 symbols in case of CP, but one slot includes 12 symbols in case of extended CP. The carrier includes a plurality of subcarriers in the frequency domain. RB (Resource Block) is defined as a plurality of consecutive subcarriers (eg, 12) in the frequency domain. A bandwidth part (BWP) is defined as a plurality of consecutive (P) RBs in the frequency domain and may correspond to one numerology (eg, SCS, CP length, etc.). The carrier may include up to N (eg 5) BWPs. Data communication is performed through an activated BWP, and only one BWP may be activated by one UE. Each element in the resource grid is referred to as a resource element (RE), one complex symbol may be mapped.

6 illustrates physical channels and general signal transmission used in a 3GPP system. In a wireless communication system, a terminal receives information through a downlink (DL) from a base station, and the terminal transmits information through an uplink (UL) to the base station. The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist according to the type / use of the information transmitted and received.

When the power is turned off while the power is turned off, or a new terminal enters a cell, an initial cell search operation such as synchronization with a base station is performed (S11). To this end, the terminal receives a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station, synchronizes with the base station, and acquires information such as a cell identity. In addition, the terminal may receive a broadcast broadcast (PBCH) from the base station to obtain broadcast information in the cell. In addition, the UE may check the downlink channel state by receiving a DL RS (Downlink Reference Signal) in the initial cell search step.

After completing the initial cell search, the UE may obtain more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) corresponding thereto (S12).

Thereafter, the terminal may perform a random access procedure (S13 to S16) to complete the access to the base station. In more detail, the UE may transmit a random access preamble through a physical random access channel (PRACH) (S13) and receive a random access response (RAR) for the preamble through a PDCCH and a PDSCH corresponding thereto (S14). Thereafter, the UE may transmit a physical uplink shared channel (PUSCH) using scheduling information in the RAR (S15) and perform a contention resolution procedure such as a PDCCH and a PDSCH corresponding thereto (S16).

After performing the above procedure, the UE may perform PDCCH / PDSCH reception (S17) and PUSCH / PUCCH (Physical Uplink Control Channel) transmission (S18) as a general uplink / downlink signal transmission procedure. Control information transmitted from the terminal to the base station is referred to as uplink control information (UCI). UCI includes Hybrid Automatic Repeat and reQuest Acknowledgment / Negative-ACK (HARQ ACK / NACK), Scheduling Request (SR), Channel State Information (CSI), and the like. The CSI includes a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a Rank Indication (RI), and the like. The UCI is generally transmitted through the PUCCH, but may be transmitted through the PUSCH when control information and data should be transmitted at the same time. In addition, the UE may transmit the UCI aperiodically through the PUSCH according to the request / instruction of the network.

The PDSCH carries downlink data (eg, DL-shared channel transport block, DL-SCH TB), and modulation methods such as Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64 QAM, and 256 QAM are used. Apply. A codeword is generated by encoding the TB. The PDSCH can carry up to two codewords. Scrambling and modulation mapping are performed for each codeword, and modulation symbols generated from each codeword are mapped to one or more layers. Each layer is mapped to a resource together with a DMRS (Demodulation Reference Signal) to generate an OFDM symbol signal, and is transmitted through a corresponding antenna port.

The PDCCH may be used to schedule DL transmissions on the PDSCH and UL transmissions on the PUSCH. Wherein the DCI on the PDCCH is associated with a downlink assignment (or DL grant) or uplink shared channel that includes at least a modulation and coding format and resource allocation information associated with the downlink shared channel. And an uplink grant (or UL grant) including modulation and coding format and resource allocation information.

The PDCCH carries downlink control information (DCI) and a QPSK modulation method is applied. One PDCCH is composed of 1, 2, 4, 8, 16 CCEs (Control Channel Elements) according to an aggregation level (AL). One CCE consists of six Resource Element Groups (REGs). One REG is defined by one OFDM symbol and one (P) RB. The PDCCH is transmitted through a control resource set (CORESET). CORESET is defined as a REG set with a given pneumonology (eg SCS, CP length, etc.). A plurality of CORESET for one terminal may be overlapped in the time / frequency domain. CORESET may be set through system information (eg, MIB) or UE-specific higher layer (eg, Radio Resource Control, RRC, layer) signaling. In detail, the number of RBs and the number of symbols (up to three) constituting the CORESET may be set by higher layer signaling.

The UE performs decoding (aka blind decoding) on the set of PDCCH candidates to obtain a DCI transmitted through the PDCCH. The set of PDCCH candidates decoded by the UE is defined as a PDCCH search space set. The search space set may be a common search space or a UE-specific search space. The UE may acquire the DCI by monitoring PDCCH candidates in one or more sets of search spaces set by MIB or higher layer signaling. Each CORESET setting is associated with one or more sets of search spaces, and each set of search spaces is associated with one COREST setting.

Table 4 illustrates features by search space type.

Table 5 illustrates the DCI formats transmitted on the PDCCH.

DCI format 0_0 is used for scheduling TB-based (or TB-level) PUSCH, DCI format 0_1 is used for scheduling TB-based (or TB-level) PUSCH or Code Block Group (CBG) -based (or CBG-level) PUSCH. It can be used to schedule. DCI format 1_0 is used for scheduling TB-based (or TB-level) PDSCH, DCI format 1_1 is used for scheduling TB-based (or TB-level) PDSCH or CBG-based (or CBG-level) PDSCH. Can be. DCI format 2_0 is used to deliver dynamic slot format information (eg, dynamic SFI) to the UE, and DCI format 2_1 is used to deliver downlink pre-Emption information to the UE. DCI format 2_0 and / or DCI format 2_1 may be delivered to UEs in a corresponding group through a group common PDCCH, which is a PDCCH delivered to UEs defined as one group.

PUSCH carries uplink data (eg, UL-shared channel transport block, UL-SCH TB) and / or uplink control information (UCI), and uses a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform. Or based on a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the terminal transmits the PUSCH by applying transform precoding. For example, when transform precoding is not possible (eg, transform precoding is disabled), the UE transmits a PUSCH based on a CP-OFDM waveform, and when conversion precoding is possible (eg, transform precoding is enabled), the UE is CP-OFDM. PUSCH may be transmitted based on the waveform or the DFT-s-OFDM waveform. PUSCH transmissions are dynamically scheduled by UL grants in DCI or semi-static based on higher layer (eg RRC) signaling (and / or Layer 1 (L1) signaling (eg PDCCH)). Can be scheduled (configured grant). PUSCH transmission may be performed based on codebook or non-codebook.

The PUCCH carries uplink control information, HARQ-ACK and / or scheduling request (SR), and is divided into Short PUCCH and Long PUCCH according to the PUCCH transmission length. Table 6 illustrates the PUCCH formats.

7 and 8 illustrate the transmission timing of a physical channel.

In the NR system, K0, K1, and K2 are defined to indicate timing between physical channels. K0 represents the time offset (eg, number of slots) from the slot with the PDCCH carrying the DL grant to the slot with the corresponding PDSCH transmission, and K1 represents the time offset from the slot of the PDSCH to the slot of the corresponding HARQ-ACK transmission. (Eg, number of slots), and K2 indicates a time offset (eg, number of slots) from a slot having a PDCCH carrying an UL grant to a slot having a corresponding PUSCH transmission. That is, KO, K1, K2 can be summarized as shown in Table 7 below.

NR supports different minimum processing time between UEs. The UE transmits information about the capability of the minimum processing time to the network, and receives the PDSCH related time domain resource allocation list information and the PUSCH related time domain resource allocation list information determined based thereon. Can be. The PDSCH-related time domain resource allocation list information may include a list of values such as K0, PDSCH transmission start symbol and length, and the network may select a value in the list through a downlink scheduling DCI (eg, DCI scheduling PDSCH). Can indicate whether this is used. After receiving the PDSCH-related time domain resource allocation list information from the base station, the UE determines timing and time resources for PDSCH reception based on the K0 value indicated by the downlink scheduling DCI in the received PDSCH-related time domain resource allocation list information. Can be. Similarly, the PUSCH related time domain resource allocation list information may include a list of values such as K2, PUSCH transmission start symbol and length, and the network may correspond to the list through an uplink scheduling DCI (eg, DCI scheduling PUSCH). You can indicate which value is used in. After the UE receives the PUSCH related time domain resource allocation list information from the base station, the UE determines timing and time resources for PUSCH transmission based on the K2 value indicated by the uplink scheduling DCI in the received PUSCH related time domain resource allocation list information. Can be.

7 illustrates ACK / NACK transmission timing. Referring to FIG. 7, the terminal may detect the PDCCH in slot #n. Here, the PDCCH includes downlink scheduling information (eg, DCI formats 1_0 and 1_1), and the PDCCH indicates a DL assignment-to-PDSCH offset (K0) and a PDSCH-HARQ-ACK reporting offset (K1). For example, the DCI formats 1_0 and 1_1 may include the following information.

Frequency domain resource assignment: indicates the RB set allocated to the PDSCH

Time domain resource assignment: K0, indicating the start position (eg OFDM symbol index) and length (eg number of OFDM symbols) of the PDSCH in the slot.

PDSCH-to-HARQ_feedback timing indicator: indicates K1

Thereafter, after receiving the PDSCH in slot # (n + K0) according to the scheduling information of slot #n, the UE may transmit UCI through PUCCH in slot # (n + K1). Here, the UCI includes a HARQ-ACK response to the PDSCH. If the PDSCH is configured to transmit at most 1 TB, the HARQ-ACK response may be configured with 1-bit. If the PDSCH is configured to transmit up to two TBs, the HARQ-ACK response may consist of two bits if spatial bundling is not configured, and one bit if spatial bundling is configured. If HARQ-ACK transmission time points for a plurality of PDSCHs are designated as slot # (n + K1), the UCI transmitted in slot # (n + K1) includes HARQ-ACK responses for the plurality of PDSCHs.

8 illustrates PUSCH transmission timing. Referring to FIG. 8, the terminal may detect the PDCCH in slot #n. Here, the PDCCH includes uplink scheduling information (eg, DCI formats 0_0 and 0_1). The DCI formats 0_0 and 0_1 may include the following information.

Frequency domain resource assignment: indicates the RB set allocated to the PUSCH

Time domain resource assignment: indicates slot offset K2, starting position (eg symbol index) and length (eg number of OFDM symbols) of the PUSCH in the slot. The start symbol and the length may be indicated through a SLIV (Start and Length Indicator Value) or may be indicated separately.

Thereafter, the UE may transmit the PUSCH in slot # (n + K2) according to the scheduling information of slot #n. Here, the PUSCH includes a UL-SCH TB.

9 illustrates a wireless communication system supporting an unlicensed band. For convenience, a cell operating in a licensed band (hereinafter referred to as L-band) is defined as an LCell, and a carrier of the LCell is defined as (DL / UL) LCC. In addition, a cell operating in an unlicensed band (hereinafter, referred to as a U-band) is defined as a UCell, and a carrier of the UCell is defined as (DL / UL) UCC. The carrier of the cell may mean an operating frequency (eg, a center frequency) of the cell. A cell / carrier (eg, CC) may be collectively referred to as a cell.

When carrier aggregation is supported, one terminal may transmit and receive a signal with a base station through a plurality of merged cells / carriers. When a plurality of CCs are configured in one UE, one CC may be set as a primary CC (PCC) and the other CC may be set as a secondary CC (SCC). Specific control information / channel (eg, CSS PDCCH, PUCCH) may be set to be transmitted and received only through the PCC. Data can be sent and received via PCC / SCC. 9 (a) illustrates a case in which a terminal and a base station transmit and receive signals through an LCC and a UCC (NSA (non-standalone) mode). In this case, the LCC may be set to PCC and the UCC may be set to SCC. When a plurality of LCCs are configured for the UE, one specific LCC may be set to PCC and the other LCCs may be set to SCC. 9 (a) corresponds to LAA of 3GPP LTE system. 9 (b) illustrates a case in which the terminal and the base station transmit and receive signals through one or more UCCs without the LCC (SA mode). in this case. One of the UCCs may be set to PCC and the other UCC may be set to SCC. In the unlicensed band of 3GPP NR system, both NSA mode and SA mode can be supported.

10 illustrates a method of occupying resources in an unlicensed band. According to the regional regulation of the unlicensed band, a communication node in the unlicensed band must determine whether the channel of other communication node (s) is used before transmitting a signal. In detail, the communication node may first perform carrier sensing (CS) before signal transmission to determine whether other communication node (s) transmit signal. When it is determined that other communication node (s) do not transmit a signal, it is defined that a clear channel assessment (CCA) has been confirmed. If there is a CCA threshold set by pre-defined or higher layer (e.g. RRC) signaling, the communication node determines the channel state to be busy if energy above the CCA threshold is detected in the channel, otherwise the channel state. Can be determined as an idle. For reference, in the Wi-Fi standard (802.11ac), the CCA threshold is defined as -62dBm for non-Wi-Fi signals and -82dBm for Wi-Fi signals. If it is determined that the channel state is idle, the communication node may start signal transmission in the UCell. The above-described series of processes may be referred to as Listen-Before-Talk (LBT) or Channel Access Procedure (CAP). LBT and CAP can be used interchangeably.

Two examples of LBT operations in Europe are called Frame Based Equipment (FBE) and Load Based Equipment (LBE). The FBE is a channel occupancy time (e.g., 1 to 10 ms), which means a time for a communication node to continue transmission when the channel access is successful, and an idle period corresponding to at least 5% of the channel occupancy time. (idle period) constitutes one fixed frame, and CCA is defined as an operation of observing a channel during a CCA slot (at least 20 μs) at the end of an idle period. The communication node performs CCA periodically on a fixed frame basis, and transmits data during the channel occupancy time if the channel is unoccupied, and suspends transmission if the channel is occupied and Wait for the CCA slot.

On the other hand, in the case of LBE, the communication node is first q∈ {4, 5,... , Set the value to 32}, and then perform CCA for one CCA slot. If the channel is not occupied in the first CCA slot, data can be transmitted by securing a maximum (13/32) q ms length of time. If the channel is occupied in the first CCA slot, the communication node will randomly N∈ {1, 2,. , q} is selected and stored as an initial value of the counter. After that, the channel state is sensed in units of CCA slots, and if the channel is not occupied in units of CCA slots, the value stored in the counter is decreased by one. When the counter value reaches 0, the communication node can transmit data with a maximum length of (13/32) q ms.

Specifically, a plurality of CAP types (ie, LBT types) may be defined for uplink transmission in the unlicensed band. For example, Type 1 or Type 2 CAP may be defined for uplink transmission. The terminal may perform a CAP (eg, Type 1 or Type 2) set / indicated by the base station for uplink signal transmission.

11 is a flowchart illustrating a type 1 CAP operation of a terminal for uplink signal transmission.

The terminal may initiate the CAP for signal transmission through the unlicensed band (S1110). The terminal may arbitrarily select the backoff counter N in the contention window CW according to step 1. At this time, the N value is set to an initial value N _init (S1120). N _init is selected from any value between 0 and CW _p . Subsequently, if the backoff counter value N is 0 in step 4 (S1130; Y), the terminal terminates the CAP process (S1132). Thereafter, the terminal may perform Tx burst transmission (S1134). On the other hand, if the backoff counter value is not 0 (S1130; N), the terminal decreases the backoff counter value by 1 according to step 2 (S1140). Thereafter, the terminal checks whether the channel of the UCell (s) is in the idle state (S1150), and if the channel is in the idle state (S1150; Y), checks whether the backoff counter value is 0 (S1130). On the contrary, if the channel is not in the idle state in step S1150, that is, the channel is busy (S1150; N), the UE according to step 5 has a delay duration T _d longer than the slot time (for example, 9us) (more than 25usec). It is checked whether the corresponding channel is in the idle state (S1160). If the channel is in the idle state during the delay period (S1170; Y), the UE may resume the CAP process again. In this case, the delay period may consist of a 16usec interval and immediately subsequent m _p consecutive slot times (eg, 9us). On the other hand, if the channel is busy during the delay period (S1170; N), the UE re-performs step S1160 to check again whether the channel is in the idle state during the new delay period.

Table 8 shows the m _p applied to the CAP according to the channel access priority class (p), the minimum CW (CW _{min, p} ), the maximum CW (CW _{max, p} ), and the maximum channel occupancy time (MCOT). (T _{ulmcot, p} ) and allowed CW sizes are shown to be different.

The CW size (CWS) applied to the Type 1 CAP may be determined based on various methods. For example, the CWS may be adjusted based on whether to toggle a new data indicator (NDI) value for at least one HARQ processor associated with HARQ_ID_ref, which is a HARQ process ID of an UL-SCH in a predetermined time interval (eg, a reference TU). When the terminal performs signal transmission using a Type 1 CAP associated with the channel access priority class p on the carrier, if the UE toggles NDI values for at least one HARQ process associated with HARQ_ID_ref, all priority classes p∈ {1 Set CW _p = CW _{min, p} in, 2,3,4}, and if not, then CW _p is the next higher allowed value in all priority classes _{p p} {1,2,3,4}. allowed value), the reference subframe n _ref (or reference slot n _ref ) is determined as follows.

UL receiving UL grant in subframe (or slot) n _g and starting from subframe (or slot) n ₀ within subframe (or slot) n ₀ , n ₁ , ... n _w and without gap When performing transmission including -SCH, the reference subframe (or slot) n _ref is a subframe (or slot) n ₀ .

In the Type 2 uplink CAP method, if the channel is sensed to be idle for at least a sensing period T _{short_ul} = 25us, the UE may perform uplink transmission (eg, PUSCH) in the unlicensed band immediately after sensing (immediately after). have. T _{short_ul} may _consist of T _sl (= 9us) + T _f (= 16us).

본 발명에서 제안하는 방법Method proposed by the present invention

In this specification, a technique and procedure related to resource allocation and rate-matching of an NR (New RAT) system in an unlicensed band (hereinafter referred to as Uband) are proposed. Although the present invention is described assuming an NR system, the principles proposed in the present invention can be applied to the LTE system in the same / similar manner.

Prior to signal transmission in Uband, whether a medium is idle is first determined through a List Before Talk (LBT) or Channel Clearance Assessment (CCA) procedure. If it is determined that the medium is busy, the terminal or the base station determines the corresponding resource unit (eg, OFDM / SC-FDMA symbol or slot or subframe or TTI). Abandon signal transmission at a specific time in Transmission Time Interval units or determine that the medium is idle from a point in time when it is determined that the medium is busy within a resource unit. Abandoned transmission for a specific time between time points may be allowed to allow partial signal transmission within the remaining resource units in time. This can also be extended to the frequency domain. For example, if two or more CCs (Component Carrier) or Bandwidth Part (BWP) are independently performed by CCA, and only a specific CC or BWP succeeds in LBT (the medium is idle ( partial signal transmission may be allowed only in the CC or BWP.

As described above, according to the LBT result, the transmission signal may be allowed to transmit only some resources, not all of the resources already reserved. In this case, puncturing rather than rate-matching may be performed. Is preferred. That is, in general, since a transmitting device generates a signal in advance of a reserved signal transmission interval and determines whether to transmit the signal according to the LBT result, a rate-matching technique requiring transmission signal regeneration according to the LBT result is easy to apply. not. This is more true for a terminal performing uplink transmission than a base station transmitting downlink. If partial transmission is allowed according to the LBT result, the intervals to be punctured within the CC or BWP are always scheduled (dynamically) or semi-statically scheduled (DCI based). Signals that are temporally advanced in the uplink signal (including both semi-statically scheduled in RRC and / or DCI combinations) and that may significantly affect performance in terms of reception performance. (For example, a signal generated from a redundancy version 0 part containing a lot of systematic bits when using a systematic channel code) or through uplink transmission From the point of view of information, a signal of high importance is likely to be included in a section that may be a target of puncturing in time. In other words, in order to reduce decoding processing time as much as possible, the reception performance is high enough to detect even with a minimum amount of information (in other words, even with some information of an encoded bit). It is common to design information that can be mapped first in time, but it is necessary to consider how to design resource mapping differently, considering that there is a high probability that a resource placed first in time as in Uband will be punctured. . In addition, there is a possibility that a terminal transmitting / receiving two or more CCs or BWPs may actually transmit only specific CC or BWP resources at the same time according to the LBT result, and the remaining CCs or BWPs may be punctured to perform only partial transmission.

Accordingly, in the present specification, scheduling is preferentially performed on a resource that is likely to be actually transmitted, and reserved for a terminal / service other than the corresponding terminal where actual transmission may be uncertain. If the base station determines that the uplink transmission uncertainty of the terminal is very low (or it is reserved for a terminal / service other than the corresponding terminal) for a resource determined to be necessary, it is necessary to reserve it for a specific third method. We propose a method of dynamically instructing (scheduling) and scheduling at a time when it is determined that there is no error. The proposed method can be applied particularly effectively in Uband, but can be applied to Lband (Licensed band) in the same way for uplink (or downlink) transmission (eg, when uncertainty is considered).

1.One. 2단계 자원 할당(2-step resource allocation) 방법2-step resource allocation method

(1) Method of allocating resource in 2-step of consecutive resources on the time axis in a slot

When scheduling a resource including some resources whose actual use is uncertain during uplink scheduling, the base station preferentially schedules resources that are likely to be used, and dynamically allocates resources that have uncertainty. May be considered. As a method for this, there may be a method of extending a scheduled resource by utilizing channel occupancy time sharing.

LBT and CCA procedures may be inefficient in terms of resource utilization because they require competitive channel occupancy between heterogeneous systems or between base stations or between multiple users. One way to overcome these drawbacks is a technique called COT sharing. For example, the base station may occupy medium through a CCA procedure and may occupy the medium without additional LBT for a specific time (COT) according to the CCA procedure and parameters. In this case, when the transmission interval of the base station shortens the downlink signal transmission in the corresponding COT, other terminals (which they are serving) for the remaining time in the COT interval without the CCA or LBT procedure (or The CCA may be performed only for a certain period of time, for example, 25 usec, without a random backoff, so that an uplink signal may be transmitted by performing an LBT that is allowed to be transmitted if the channel is idle. Can be. In addition, in the NR system, downlink scheduling and uplink scheduling do not only indicate frequency domain resources of a shared channel (eg, PDSCH, PUSCH, PUCCH, etc.) but also time. Various delays (eg, time intervals from the scheduling message / signal to the first transmission of the indicated shared channel / signal) in the region may be indicated. In addition, the scheduled PUCCH / PUSCH may be instructed not to occupy all one slot but to occupy a specific number of symbols in the slot.

If you take advantage of the combination of techniques described above,

(1-A) The base station may allocate a scheduling delay large enough to allow the terminal to transmit an uplink signal after a specific time, and thus may be a PUCCH corresponding to the case where the downlink received signal is scheduled. ) / PUSCH transmission,

(1-B) The base station occupies the medium again in a section slightly ahead of the actual scheduled uplink signal transmission, thereby eliminating the need for (or minimizing) COT sharing of the terminal's LBT / CCA process. Uplink scheduling may be utilized. In this case, the PUCCH / PUSCH transmission may be indicated with a very small scheduling delay (for example, COT sharing is possible), thereby indicating a new uplink signal transmission until immediately before the uplink signal scheduled previously.

(1-C) The terminal places an already scheduled uplink resource (e.g., N symbols shorter than the slot length) in advance of M symbols (e.g., previously scheduled N symbols) additionally allocated for COT sharing. It can be used as one uplink resource. Here, there may be a constraint that the N + M symbol period should not cross the slot boundary. In this case, since the terminal may not receive / detect a DCI or message / signal indicating extended resource allocation to the COT share or may not have enough time to regenerate the uplink signal by extending to a newly allocated resource, the resource may be insufficient. From a resource mapping perspective, the resource mapping is first performed on a scheduled resource, and later on an additional resource extended as a COT share, the encoding stored in a virtual (or circular) buffer. The encoded bits can be extracted consecutively (after the encoded bits extracted from the previous resource mapping) to generate a signal and perform resource mapping. That is, the order of the encoded bits transmitted first in the time domain may not precede the encoded bits transmitted afterwards in terms of a virtual buffer. If the number of newly added symbols (eg, M) through COT sharing is greater than a predetermined value than the number of pre-scheduled uplink symbols (eg, N) or indicates additional resource allocation through COT sharing If the time from the DCI or the message / signal to the first transmission of the corresponding uplink signal is long enough (e.g., considering the processing capability of the terminal reported by the base station, it is less than the minimum time required from DCI to signal generation). When a long time is secured), the order in which encoded bits are mapped to uplink resources may be the same as the order of resources transmitted first in the time domain.

(1-D) The method may require blind detection of the base station in consideration of a case where the terminal may fail to receive / detect a message indicating uplink scheduling.

1-D-A. However, if the uplink signal scheduled by a method other than COT sharing is periodically set in a semi-static manner, the probability of missing a scheduling grant is considered. Since it is not necessary, the resource mapping of the uplink resource extended to the COT share may always be subordinated (for example, the resource resource transmitted preferentially to the resource transmitted subsequently to the uplink resource extended to the COT share within the slot).

1-D-B. Otherwise, a redundancy version to be used for resources extended to COT sharing may be directly indicated at the time of uplink scheduling.

In the above proposal, the second step (or resource extension method through dynamic scheduling) may be indicated through a common DCI. That is, the base station presets an uplink resource that can be extended in a slot through a dynamic DCI (or signal) in a specific interval before the scheduled uplink resource transmission. In the case of instructing to use in a 2nd step, rather than instructing each terminal individually, it may be notified by a DCI or a signal that can be received by a terminal instructed by a specific group or a corresponding setting.

(2) Method of Allocating Uplink Resource in 2-Step with Frequency Axis

In general, the terminal may be configured with one or more CC or (active) BWP on the frequency axis. In Uband, the LBT may be performed more specifically by frequency resource (for example, CC or BWP). In the case of using the multi-frequency resources, the method of performing LBT for CCA is largely (a) LBT for each frequency resource, and (b) LBT for all set multi-frequency resources. The same is true for the base station, and in some cases, the probability that a specific frequency resource succeeds in LBT compared to other frequency resources may be high. In consideration of such a situation, the base station preferentially performs uplink scheduling for a specific frequency resource, and then overlaps the same or partially overlapped in the time domain with the previously scheduled uplink according to the LBT result for each frequency resource. Uplink scheduling may be performed (later) for other frequency resources at a time point, which may be referred to as 2nd step uplink resource allocation. As another example, after the base station preferentially uplinks scheduling for a specific frequency resource #A to a terminal, the base station occupying the COT for the frequency resource #B as well as the specific frequency resource #A is further added to the terminal. Uplink scheduling may be performed on the frequency resource #B through uplink resource allocation. In this case, the scheduled uplink time axis resource may be the same as or partially overlap with the time axis resource on the frequency resource #A which was previously scheduled uplink. The frequency resource described in the present invention may mean a frequency band resource unit performing LBT in a specific BWP, or may mean a BWP.

In such a method, if there is not enough time between the second stage scheduling and the actual uplink signal transmission, it may not be possible to generate a signal to transmit to the additionally scheduled frequency resource from the terminal's point of view. Whether the terminal can actually generate a signal during the corresponding period depends on the processing power of the terminal (e.g., the minimum time from the uplink scheduling indication to the generation of the corresponding uplink signal) as well as the uplink. It may be determined according to the value of TA (Timing Advance), and since the latter parameter may not be completely known from the base station, such a two-step dynamic uplink resource allocation may be performed in some cases. Uplink signal generation may not be guaranteed. Therefore, it is preferable that the terminal performs resource mapping on a frequency resource scheduled in advance prior to the second step, and resource mapping subsequent to the previous resource mapping on the resource further expanded in the second step. That is, one TBS (Transport Block Size) performs resource mapping in all allocated frequency resources first, and the frequency resources further extended in the second step subsequently perform resource mapping. Where resource mapping within frequency resources

(2-A) Priority is performed on all scheduled OFDM / SC-FDMA symbols (not across slot boundaries) within the scheduled frequency resource (frequency first mapping within that time / frequency resource). Is more preferred)

(2-B) For the frequency resources extended to the second step, all frequency resources (except for the frequency resources which have already been resource mapped in (A)) may be combined to perform resource mapping in a frequency-first mapping manner. It may be. This may be to reduce signal generation delay by preferentially resource mapping uplink signals that need to be transmitted first in time in terms of uplink signal generation.

(2-C) Alternatively, the frequency resource extended in the second step may be used to repeatedly transmit the signal generated in (A). That is, the signal may be transmitted by re-running only the resource mapping so as not to regenerate the transmission signal generated in (A) and to match the location of the resource additionally obtained in the second step.

2.2. 2단계 자원 할당 방법을 위한 단말기 능력(capability) 및 스케줄링 DCI(scheduling DCI) 구성Terminal Capability and Scheduling DCI Configuration for Two-Stage Resource Allocation Method

The previously proposed two-step scheduling method has different characteristics in terms of a conventional scheduling method and a signal generation method. That is, the signal generation method according to the scheduling of the first step may be the same as the existing scheduling method, but the method of generating the signal to use the extended resources in the second step scheduling may be the existing scheduling method. It may differ from the signal generation method and procedure according to the method. This may be limited in a time interval in which resources can be extended in a second step according to the capability of the transmitter. In order to reflect such characteristics, the capability related to signal processing / generation and scheduling DCI reflecting the same The configuration may need to be newly defined.

(1) Definition of processing time (associated with signal generation) associated with 2nd step scheduling

Using the NR system as an example, the minimum time N1 required between the downlink scheduled PDSCH and the corresponding HARQ-ACK and the minimum time N2 required between the scheduling DCI and the corresponding PUSCH are defined as the capabilities of the terminal, which is reported to the base station. And reflected in the scheduling delay. Here, N1 and N2 may be equally used as parameters related to signal generation time according to first step scheduling. However, as described above, a signal generation method for using additional resources allocated in the second step may be different from the first step scheduling, and downlink scheduling that needs to be considered in the second step scheduling may be reflected in the second step scheduling. The minimum time required between the PDSCH and the corresponding HARQ-ACK and the minimum time required between the scheduling DCI and the corresponding PUSCH need to be further defined as N1 'and N2', respectively. In order to allocate two-step resources, the base station needs to report N1, N2, N1 ', and N2'. The terminal receives N1, N2, N1 ', It can be allowed to expect a scheduling delay not greater than N2 '. That is, if a scheduling delay of longer time than the reported capability is detected, the scheduling can be ignored. The N1 'and N2' may be values reported by the terminal to the base station, but may be defined in the standard as a value that must be supported by the terminal supporting the resource mapping of the two-stage scheduling, or may be specified from the existing N1 and N2. It may be defined as a value reduced by an offset (eg, the offset value may be different depending on whether N1 or N2, or may be different for each numerology). In addition, as an allowable value for the actual scheduling delay, an offset by a specific value may be considered in consideration of a TA (Timing Advance) value.

(2) Define resource allocation field for each stage

In the two-step resource allocation proposed in the present invention, the second step scheduling may allocate resources more dynamically than the first step scheduling. Thus, the scheduling delay of the second stage may be less than the first stage scheduling delay, and the maximum duration of the time domain resources of the scheduled resources does not interfere with the start of the resources scheduled in the first stage. It is common to not. Accordingly, the scheduling delay K1 'or K2' of the second stage may have a value different from that of the first stage scheduling delay K1 or K2. In some cases, the scheduling delays K1 'and K2', which denote slot scheduling delays, are scheduled. May not be present in the DCI. In addition, a start symbol and a last symbol (or the number of scheduled symbols) used to indicate a symbol period occupied by a scheduled resource in the time domain include a first phase scheduling DCI and a second phase scheduling DCI. Can be defined in different ranges. For example, the last symbol or number of scheduled symbols used in the second stage may be limited to a value that does not exceed the start symbol position of the resource of the same slot indicated in the first stage scheduling in the time domain.

(3) Information for distinguishing 1st step scheduling from 2nd step scheduling

As described above in (2), some information (eg, scheduling delay, time interval of scheduled symbols) between the first and second steps needs to be interpreted differently from each other. Therefore, in order to indicate whether the interpretation of the scheduling DCI is understood as the first stage or the second stage, information for distinguishing the first stage or the second stage may be included in the scheduling DCI. This may be implemented in a way of explicitly including the information identifying the steps in the scheduling DCI, or in the case of COT sharing may be implemented in an indirect way so that the terminal understands the second step and interprets the scheduling DCI.

The operation illustrated in FIG. 12 may be performed in the unlicensed band, and may be applied to the case where the unlicensed band is configured in Non-StandAlone (NSA) mode as well as in a SA (StandAlone) mode (eg, see FIG. 9). In the example of FIG. 12, the first DCI refers to the DCI for the first stage scheduling among the two-phase resource allocation according to the present invention, and the second DCI refers to the DCI for the second stage scheduling among the two-phase resource allocation according to the present invention. Refers to. In addition, in the example of FIG. 12, the first resource refers to a (time / frequency) resource scheduled (or indicated) by the first DCI, and the second resource is scheduled (or indicated) by the second DCI. (Time / Frequency) Refers to a resource. In the example of FIG. 12, a base station (BS) is a wireless device that communicates with a terminal. Other terms such as an evolved Node-B (eNB), a General Node-B (gNB), a base transceiver system (BTS), an access point (AP), and the like. The terminal may be referred to as other terms such as user equipment (UE), mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), wireless device, and the like. Can be.

Referring to FIG. 12, the terminal may transmit its capability information to the base station, and the base station may receive capability information of the terminal (S1202). The capability information transmitted and received in S1202 may be configured as proposed in the present invention and include information according to the present invention (for example, “2. Capability and Scheduling DCI for a Two-Stage Resource Allocation Method”). Configuration ”). For example, the capability information of S1202 may include information about a minimum processing time (eg, N2) required between the first DCI and uplink transmission (eg, PUSCH transmission) related thereto. And / or, the capability information of S1202 may be, for example, a minimum processing time (eg, required) between downlink transmission (eg, PDSCH) scheduled by the first DCI and associated uplink transmission (eg, HARQ-ACK transmission). Information about N1). And / or, the capability information of S1202 may include, for example, information about a minimum processing time (eg, N 2 ′) required between the second DCI and uplink transmission (eg, PUSCH transmission) related thereto. And / or, the capability information of S1202 may be, for example, a minimum processing time required (eg, a downlink transmission (eg PDSCH) scheduled by a second DCI) and an associated uplink transmission (eg HARQ-ACK transmission). N1 ').

Alternatively, information about a minimum processing time (eg, N2 ′) required between the second DCI and uplink transmission (eg, PUSCH transmission) related thereto, and downlink transmission (eg, PDSCH) scheduled by the second DCI, and Information about the minimum processing time (e.g., N1 ') required between related uplink transmissions (e.g., HARQ-ACK transmissions) is not transmitted to the base station via the capability information, but is defined by a standard, or the base station has a specific offset. Based on the minimum processing time (e.g., N1) required between the downlink transmission (e.g. PDSCH) scheduled by the first DCI and the uplink transmission (e.g. HARQ-ACK transmission) associated therewith. (See, eg, “2. Capability and Scheduling DCI Configuration for Two-Stage Resource Allocation Method”).

In S1204, the base station may transmit a first DCI indicating the first resource to the terminal based on the capability information, and the terminal may receive the first DCI indicating the first resource from the base station. The first DCI of S1204 may indicate a scheduling delay (or time offset) (eg, K2) between the first DCI and the first resource (or uplink transmission (eg, PUSCH transmission) based on the first DCI) ( Yes, see description in FIG. 8 and Table 7). In this case, the first DCI may additionally indicate the start symbol position and the number of symbols of the first resource (or uplink transmission based on the first DCI (eg, PUSCH transmission)) (see, for example, FIG. 8 and related description). . Or, the first DCI of S1204 is a scheduling delay (or downlink transmission) between a first resource (or downlink transmission (eg, PDSCH transmission)) scheduled by the first DCI and an uplink transmission (eg, HARQ-ACK transmission) associated therewith. Time offset) (e.g., K1) (see, eg, the description of FIG. 7 and Table 7).

For example, the base station transmits time domain resource allocation list information to the terminal based on the capability information of S1202, and the terminal allocates time domain resource related to uplink transmission (eg, PUSCH) and downlink transmission (eg, PDSCH) from the base station. List information may be received (eg, see description in Table 7). The first DCI may indicate a specific value in the relevant time domain resource allocation list information, and a scheduling delay (eg, K2) may be determined based on the indicated value.

In S1206, the base station transmits a second DCI indicating a second resource to the terminal based on the capability information, and the terminal may receive a second DCI indicating the second resource from the base station. In a manner similar to the first DCI, the second DCI of S1206 is a scheduling delay (or time offset) between the second DCI and the second resource (or uplink transmission (eg, PUSCH transmission) based on the second DCI) (eg, K2) (see, eg, the descriptions of FIG. 8 and Table 7). In this case, the second DCI may additionally indicate the start symbol position and the number of symbols of the second resource (or uplink transmission based on the second DCI (eg, PUSCH transmission)) (see, for example, FIG. 8 and related description). . Alternatively, the second DCI of S1206 may be a scheduling delay (or downlink transmission) between a second resource (or downlink transmission (eg, PDSCH transmission)) scheduled by the second DCI and an uplink transmission (eg, HARQ-ACK transmission) associated therewith. Time offset) (e.g., K1) (see, eg, the description of FIG. 7 and Table 7). In addition, similar to S1204, the scheduling delay (eg, K2) may be determined based on a value indicated by the second DCI in the time domain resource allocation list information.

The scheduling delay (or time offset), the start symbol position, and the number of symbols indicated in S1206 may have different values or different interpretations from the scheduling delay (or time offset), the start symbol position, and the number of symbols indicated in S1204. (For example, see “2. (2) Resource allocation field definition for each step”). For example, the number of symbols of the second resource may be limited not to exceed the start symbol position of the first resource in the slot including the first resource.

The first resource and the second resource may be allocated as proposed in the present invention (see, for example, "1. 2-step resource allocation method"). For example, the second resource is continuously allocated prior to the first resource in the time domain, the uplink signal generated based on the first DCI is preferentially mapped to the first resource, and the second resource is continuously in the circular buffer. The signal generated by extraction may be mapped. As another example, the second resource is allocated to a location different from the first resource in the frequency domain, and is allocated to a location that is the same as or partially overlapped with the first resource in the time domain, and the uplink signal generated based on the first DCI is generated. It may be preferentially mapped to one resource and additionally mapped to a second resource for repeated transmission. In this case, resource mapping may be performed based on the frequency priority mapping scheme.

In S1206, the terminal may transmit an uplink signal to the base station based on the first DCI and the second DCI, and the base station may receive the uplink signal from the terminal.

The two-stage resource allocation according to the present invention may be indicated explicitly or implicitly through the DCI (eg, “2. Capability and scheduling of the terminal for the two-stage resource allocation method and scheduling DCI (scheduling)”. DCI) configuration ”). For example, when explicitly indicated, the first DCI and the second DCI may include indication information indicating whether the first stage scheduling or the second stage scheduling is respectively performed. In this case, when the indication information indicates that the first step is scheduled, the resource scheduled by the DCI is interpreted / identified as the first resource, and when the indication information indicates that the second step is scheduled, the resource scheduled by the DCI is Can be interpreted / identified as a second resource.

As another example, when implicitly indicated, the minimum processing time (eg, N1 'or N2) included in the scheduling delay (or time offset) indicated by the second DCI (eg, K1' or K2 ') and capability information of S1202. Based on the information regarding '), the terminal may determine whether the received DCI is for the second stage scheduling (or whether it is the second DCI) (eg, “2. Capability and Scheduling DCI Configuration ”. As a more specific example, if the scheduling delay (or time offset) indicated by the DCI (eg, K1 'or K2') is not greater than the minimum processing time (eg, N1 'or N2'), the terminal may receive a received DCI. It is possible to determine that it is for two-stage scheduling and to interpret / identify a resource indicated by the received DCI as a second resource, and to identify an uplink signal generated based on a previously received DCI (eg, the first DCI). As suggested by hereinafter, it may be transmitted based on the first resource and the second resource. If the scheduling delay (or time offset) indicated by the DCI (e.g., K1 'or K2') is greater than the minimum processing time (e.g., N1 'or N2'), the terminal may receive the received DCI (and thereby scheduling). Disregarded resources) and may transmit an uplink signal based on a previously received DCI (eg, the first DCI).

As another example, when implicitly indicated, based on the scheduling delay (or time offset) (eg, K1 'or K2') indicated by the second DCI and the time domain resource allocation list information received from the base station, It may be determined whether the received DCI is for second stage scheduling (or whether it is a second DCI). As a more specific example, if the scheduling delay (or time offset) indicated by the DCI (eg, K1 'or K2') is not greater than the smallest value of the time domain resource allocation list information, the terminal determines that the received DCI is the second step. It is possible to determine the scheduling and to interpret / identify a resource indicated by the received DCI as a second resource, and to propose an uplink signal generated based on a previously received DCI (eg, the first DCI). As described above, transmission may be performed based on the first resource and the second resource. If the scheduling delay (or time offset) indicated by the DCI (eg, K1 'or K2') is greater than the smallest value of the time domain resource allocation list information, then the terminal receives the received DCI (and the resources scheduled by it). ), And may transmit an uplink signal based on a previously received DCI (eg, the first DCI).

In the above examples, the second DCI may not include information indicating a scheduling delay (or time offset) (eg, K1 'or K2'). In this case, the terminal may interpret / induce the second stage scheduling delay to 0, or interpret / induce it to the smallest value in the time domain resource allocation list information to perform operations according to the present invention.

본 발명이 적용될 수 있는 시스템 및 장치System and apparatus to which the present invention can be applied

Although not limited thereto, the various descriptions, functions, procedures, suggestions, methods and / or operational flowcharts of the present invention disclosed herein may be applied to various fields requiring wireless communication / connection (eg, 5G) between devices. have.

Hereinafter, with reference to the drawings to illustrate in more detail. The same reference numerals in the following drawings / descriptions may illustrate the same or corresponding hardware blocks, software blocks, or functional blocks unless otherwise indicated.

13 illustrates a communication system 1 applied to the present invention.

Referring to Fig. 13, a communication system 1 applied to the present invention includes a wireless device, a base station and a network. Here, the wireless device refers to a device that performs communication using a radio access technology (eg, 5G New RAT (Long Term), Long Term Evolution (LTE)), and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may be a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, a home appliance 100e. ), IoT (Internet of Thing) device (100f), AI device / server 400 may be included. For example, the vehicle may include a vehicle having a wireless communication function, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, and the like. Here, the vehicle may include an unmanned aerial vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, Head-Mounted Device (HMD), Head-Up Display (HUD), television, smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. The portable device may include a smartphone, a smart pad, a wearable device (eg, smart watch, smart glasses), a computer (eg, a notebook, etc.). The home appliance may include a TV, a refrigerator, a washing machine, and the like. IoT devices may include sensors, smart meters, and the like. For example, the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station / network node to other wireless devices.

The wireless devices 100a to 100f may be connected to the network 300 through the base station 200. AI (Artificial Intelligence) technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300. The network 300 may be configured using a 3G network, a 4G (eg LTE) network or a 5G (eg NR) network. The wireless devices 100a-100f may communicate with each other via the base station 200 / network 300, but may also communicate directly (e.g. sidelink communication) without going through the base station / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. vehicle to vehicle (V2V) / vehicle to everything (V2X) communication). In addition, the IoT device (eg, sensor) may directly communicate with another IoT device (eg, sensor) or another wireless device 100a to 100f.

Wireless communication /

connection

150a, 150b, 150c may be performed between the wireless devices 100a-100f / base station 200 and base station 200 / base station 200. Here, the wireless communication / connection is various wireless connections such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), inter-base station communication 150c (eg relay, integrated access backhaul), and the like. Technology (eg, 5G NR) via wireless communication /

connections

150a, 150b, 150c, the wireless device and the base station / wireless device, the base station and the base station may transmit / receive radio signals to each other. For example, the wireless communication /

connection

150a, 150b, 150c may transmit / receive signals over various physical channels.To this end, based on various proposals of the present invention, a wireless signal for transmission / reception At least some of various configuration information setting processes, various signal processing processes (eg, channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.) and resource allocation processes may be performed.

14 illustrates a wireless device that can be applied to the present invention.

Referring to FIG. 14, the first wireless device 100 and the second wireless device 200 may transmit and receive wireless signals through various wireless access technologies (eg, LTE and NR). Here, the {first wireless device 100 and the second wireless device 200} may refer to the {wireless devices 100a to 100f, the base station 200} and / or the {wireless devices 100a to 100f, the wireless device of FIG. Devices 100a to 100f}.

The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 controls the memory 104 and / or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 102 may process the information in the memory 104 to generate the first information / signal, and then transmit the wireless signal including the first information / signal through the transceiver 106. In addition, the processor 102 may receive the radio signal including the second information / signal through the transceiver 106 and store the information obtained from the signal processing of the second information / signal in the memory 104. The memory 104 may be coupled to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may perform instructions to perform some or all of the processes controlled by the processor 102 or to perform descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Can store software code that includes them. Here, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 106 may be coupled to the processor 102 and may transmit and / or receive wireless signals via one or more antennas 108. The transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be mixed with a radio frequency (RF) unit. In the present invention, a wireless device may mean a communication modem / circuit / chip.

The second wireless device 200 may include one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 controls the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 202 may process the information in the memory 204 to generate third information / signal, and then transmit the wireless signal including the third information / signal through the transceiver 206. In addition, the processor 202 may receive the radio signal including the fourth information / signal through the transceiver 206 and then store information obtained from the signal processing of the fourth information / signal in the memory 204. The memory 204 may be connected to the processor 202 and store various information related to the operation of the processor 202. For example, the memory 204 may perform instructions to perform some or all of the processes controlled by the processor 202 or to perform descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Can store software code that includes them. Here, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 206 may be coupled with the processor 202 and may transmit and / or receive wireless signals via one or more antennas 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be mixed with an RF unit. In the present invention, a wireless device may mean a communication modem / circuit / chip.

Hereinafter, hardware elements of the

wireless devices

100 and 200 will be described in more detail. One or more protocol layers may be implemented by one or

more processors

102, 202, although not limited thereto. For example, one or

more processors

102 and 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or

more processors

102, 202 may employ one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. Can be generated. One or

more processors

102, 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. One or

more processors

102, 202 may generate signals (eg, baseband signals) including PDUs, SDUs, messages, control information, data or information in accordance with the functions, procedures, suggestions and / or methods disclosed herein. And one or

more transceivers

106 and 206. One or

more processors

102, 202 may receive signals (eg, baseband signals) from one or

more transceivers

106, 206, and include descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. In accordance with the above, a PDU, an SDU, a message, control information, data, or information can be obtained.

One or

more processors

102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or

more processors

102, 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) May be included in one or

more processors

102, 202. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) of It may be driven by the above-described processor (102, 202). The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions, and / or a set of instructions.

One or

more memories

104, 204 may be coupled to one or

more processors

102, 202 and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or instructions. One or

more memories

104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer readable storage medium, and / or combinations thereof. One or

more memories

104, 204 may be located inside and / or outside one or

more processors

102, 202. In addition, one or

more memories

104, 204 may be coupled with one or

more processors

102, 202 through various techniques, such as a wired or wireless connection.

One or

more transceivers

106 and 206 may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operational flowcharts of this document, to one or more other devices. One or

more transceivers

106 and 206 may receive, from one or more other devices, user data, control information, wireless signals / channels, etc., as mentioned in the description, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. have. For example, one or

more transceivers

106 and 206 may be coupled with one or

more processors

102 and 202 and may transmit and receive wireless signals. For example, one or

more processors

102 and 202 may control one or

more transceivers

106 and 206 to transmit user data, control information or wireless signals to one or more other devices. In addition, one or

more processors

102 and 202 may control one or

more transceivers

106 and 206 to receive user data, control information or wireless signals from one or more other devices. In addition, one or

more transceivers

106, 206 may be coupled with one or

more antennas

108, 208, and one or

more transceivers

106, 206 may be connected to one or

more antennas

108, 208 through the description, functions, and features disclosed herein. Can be set to transmit and receive user data, control information, wireless signals / channels, etc., which are mentioned in the procedures, procedures, suggestions, methods and / or operational flowcharts, and the like. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). One or

more transceivers

106, 206 may process the received wireless signal / channel or the like in an RF band signal to process received user data, control information, wireless signals / channels, etc. using one or more processors 102,202. The baseband signal can be converted. One or

more transceivers

106 and 206 may use the one or

more processors

102 and 202 to convert processed user data, control information, wireless signals / channels, etc. from baseband signals to RF band signals. To this end, one or

more transceivers

106 and 206 may include (analog) oscillators and / or filters.

15 shows another example of a wireless device to which the present invention is applied. The wireless device may be implemented in various forms depending on the use-example / service (see FIG. 13).

Referring to FIG. 15, the

wireless devices

100 and 200 correspond to the

wireless devices

100 and 200 of FIG. 14, and various elements, components, units / units, and / or modules may be used. It can be composed of). For example, the

wireless device

100, 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140. The communication unit may include communication circuitry 112 and transceiver (s) 114. For example, the communication circuit 112 may include one or

more processors

102, 202 and / or one or

more memories

104, 204 of FIG. 14. For example, the transceiver (s) 114 may include one or

more transceivers

106, 206 and / or one or

more antennas

108, 208 of FIG. 14. The controller 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140, and controls various operations of the wireless device. For example, the controller 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. In addition, the control unit 120 transmits the information stored in the memory unit 130 to the outside (eg, other communication devices) through the communication unit 110 through a wireless / wired interface, or externally (eg, through the communication unit 110). Information received through a wireless / wired interface from another communication device) may be stored in the memory unit 130.

The additional element 140 may be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include at least one of a power unit / battery, an I / O unit, a driver, and a computing unit. Although not limited to this, the wireless device may be a robot (FIGS. 13, 100 a), a vehicle (FIGS. 13, 100 b-1, 100 b-2), an XR device (FIGS. 13, 100 c), a portable device (FIGS. 13, 100 d), a home appliance. (FIGS. 13, 100e), IoT devices (FIGS. 13, 100f), digital broadcasting terminals, hologram devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environment devices, The server may be implemented in the form of an AI server / device (FIGS. 13 and 400), a base station (FIGS. 13 and 200), a network node, and the like. The wireless device may be used in a mobile or fixed location depending on the usage-example / service.

In FIG. 15, various elements, components, units / units, and / or modules in the

wireless device

100, 200 may be entirely interconnected through a wired interface, or at least a part of them may be wirelessly connected through the communication unit 110. For example, the control unit 120 and the communication unit 110 are connected by wire in the

wireless device

100 or 200, and the control unit 120 and the first unit (eg, 130 and 140) are connected through the communication unit 110. It can be connected wirelessly. In addition, each element, component, unit / unit, and / or module in

wireless device

100, 200 may further include one or more elements. For example, the controller 120 may be composed of one or more processor sets. For example, the controller 120 may be configured as a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, and the like. As another example, the memory unit 130 may include random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and / or combinations thereof.

Hereinafter, the implementation example of FIG. 15 will be described in more detail with reference to the accompanying drawings.

16 illustrates a portable device applied to the present invention. The mobile device may include a smart phone, a smart pad, a wearable device (eg, smart watch, smart glasses), a portable computer (eg, a notebook, etc.). The mobile device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).

Referring to FIG. 16, the portable device 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input / output unit 140c. ) May be included. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 to 130 / 140a to 140c respectively correspond to blocks 110 to 130/140 of FIG. 15.

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations. The controller 120 may control various components of the mobile device 100 to perform various operations. The control unit 120 may include an application processor (AP). The memory unit 130 may store data / parameters / programs / codes / commands necessary for driving the portable device 100. In addition, the memory unit 130 may store input / output data / information and the like. The power supply unit 140a supplies power to the portable device 100 and may include a wired / wireless charging circuit, a battery, and the like. The interface unit 140b may support the connection of the mobile device 100 to another external device. The interface unit 140b may include various ports (eg, audio input / output port and video input / output port) for connecting to an external device. The input / output unit 140c may receive or output image information / signal, audio information / signal, data, and / or information input from a user. The input / output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

For example, in the case of data communication, the input / output unit 140c obtains information / signals (eg, touch, text, voice, image, and video) input from the user, and the obtained information / signal is stored in the memory unit 130. Can be stored. The communication unit 110 may convert the information / signal stored in the memory into a wireless signal, and directly transmit the converted wireless signal to another wireless device or to the base station. In addition, the communication unit 110 may receive a radio signal from another wireless device or a base station, and then restore the received radio signal to original information / signal. The restored information / signal may be stored in the memory unit 130 and then output in various forms (eg, text, voice, image, video, heptic) through the input / output unit 140c.

17 illustrates a vehicle or an autonomous vehicle applied to the present invention. The vehicle or autonomous vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, or the like.

Referring to FIG. 17, a vehicle or an autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and autonomous driving. It may include a portion 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110/130 / 140a through 140d respectively correspond to blocks 110/130/140 in FIG.

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other devices such as another vehicle, a base station (eg, a base station, a road side unit), a server, and the like. The controller 120 may control various elements of the vehicle or the autonomous vehicle 100 to perform various operations. The control unit 120 may include an electronic control unit (ECU). The driving unit 140a may cause the vehicle or the autonomous vehicle 100 to travel on the ground. The driver 140a may include an engine, a motor, a power train, wheels, a brake, a steering device, and the like. The power supply unit 140b supplies power to the vehicle or the autonomous vehicle 100, and may include a wired / wireless charging circuit, a battery, and the like. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like. The sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / Reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, humidity sensors, ultrasonic sensors, illuminance sensors, pedal position sensors, and the like. The autonomous driving unit 140d is a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and automatically setting a route when a destination is set. Technology and the like.

For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the obtained data. The controller 120 may control the driving unit 140a to move the vehicle or the autonomous vehicle 100 along the autonomous driving path according to the driving plan (eg, speed / direction adjustment). During autonomous driving, the communication unit 110 may acquire the latest traffic information data aperiodically from an external server and may obtain the surrounding traffic information data from the surrounding vehicles. In addition, during autonomous driving, the sensor unit 140c may acquire vehicle state and surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and the driving plan based on the newly obtained data / information. The communication unit 110 may transmit information regarding a vehicle location, an autonomous driving route, a driving plan, and the like to an external server. The external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomous vehicles, and provide the predicted traffic information data to the vehicle or autonomous vehicles.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. In addition, it is also possible to configure the embodiments of the present invention by combining some components and / or features. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation in the claims, or may be incorporated into new claims by post-application correction.

The present invention can be applied not only to 3GPP LTE / LTE-A system / 5G system (or NR (New RAT) system) but also to wireless communication devices such as terminals, base stations, etc. that operate in various wireless communication systems.

Claims

A method of transmitting an uplink signal by a user equipment (UE) in a wireless communication system supporting an unlicensed band based on 2-step resource allocation,

Transmitting capability information of the user equipment to a base station;

Receiving first downlink control information (DCI) indicating a first resource from the base station;

Receiving a second DCI indicating a second resource from the base station; And

Transmitting the uplink signal to the base station based on the first DCI and the second DCI,

The capability information includes information about a minimum processing time required between the second DCI and uplink transmission associated with the second DCI,

The second DCI indicates a scheduling delay between the second DCI and the second resource,

When the scheduling delay between the second DCI and the second resource is not greater than the minimum processing time, transmitting the uplink signal may include:

Generating the uplink signal based on the first DCI;

Transmitting the generated uplink signal based on the first resource and the second resource.
The method according to claim 1,

When the scheduling delay between the second DCI and the second resource is greater than the minimum processing time, transmitting the uplink signal may include:

Generating the uplink signal based on the first DCI;

Ignoring the second resource and transmitting the generated uplink signal based on the first resource.
The method according to claim 1,

The second resource is consecutively allocated prior to the first resource in a time domain,

Transmitting the generated uplink signal based on the first resource and the second resource,

Mapping an uplink signal generated based on the first DCI to the first resource;

Mapping the signal generated by successive extraction from the circular buffer to the second resource;

Transmitting the mapped signals to the base station.
The method according to claim 1,

And the second resource is assigned to a location different from the first resource in the frequency domain and to a location that is the same as or partially overlapped with the first resource in the time domain.
The method according to claim 4,

Transmitting the generated uplink signal based on the first resource and the second resource,

Mapping an uplink signal generated based on the first DCI to the first resource;

Mapping an uplink signal generated based on the first DCI to the second resource;

Transmitting the mapped signals to the base station.
The method according to claim 5,

The uplink signal generated based on the first DCI is mapped to the first resource and the second resource in a frequency-first mapping manner.
The method according to claim 1,

The first DCI also indicates a starting symbol position of the first resource and the number of symbols of the first resource,

The second DCI also indicates a starting symbol position of the second resource and the number of symbols of the second resource,

And the number of symbols of the second resource is limited not to exceed the start symbol position of the first resource within a slot containing the first resource.
The method according to claim 1,

The uplink signal is transmitted through a physical uplink shared channel (PUSCH).
The method according to claim 1,

Wherein the first DCI and the second DCI are received over respective Physical Downlink Control Channels (PDCCHs).
In a user equipment (UE) configured to transmit an uplink signal based on 2-step resource allocation in a wireless communication system supporting an unlicensed band,

A radio frequency (RF) transceiver; And

And a processor operatively connected with the RF transceiver, wherein the processor controls the RF transceiver to transmit capability information of the user equipment to a base station and indicates a first resource from the base station. Receives 1 downlink control information (DCI), receives a second DCI indicating a second resource from the base station, and transmits the uplink signal based on the first DCI and the second DCI. Configured to transmit to the base station,

The capability information includes information about a minimum processing time required between the second DCI and uplink transmission associated with the second DCI,

The second DCI indicates a scheduling delay between the second DCI and the second resource,

When the scheduling delay between the second DCI and the second resource is not greater than the minimum processing time, transmitting the uplink signal,

Generating the uplink signal based on the first DCI;

And transmitting the generated uplink signal based on the first resource and the second resource.
In a method for allocating resources based on 2-step resource allocation in a wireless communication system supporting an unlicensed band,

Receiving capability information from a user equipment (UE);

Transmitting first downlink control information (DCI) indicating a first resource to the user device; And

Transmitting a second DCI indicating a second resource to the user equipment within a channel occupancy time (COT) of the base station;

The capability information includes information about a minimum processing time required between the second DCI and uplink transmission associated with the second DCI,

The second DCI indicates a scheduling delay between the second DCI and the second resource,

And the scheduling delay between the second DCI and the second resource is set not to be greater than the minimum processing time.
The method according to claim 11,

And the second resource is consecutively allocated prior to the first resource in a time domain.
The method according to claim 11,

And the second resource is assigned to a location different from the first resource in the frequency domain and to a location that is the same as or partially overlapped with the first resource in the time domain.
The method according to claim 11,

The first DCI also indicates a starting symbol position of the first resource and the number of symbols of the first resource,

The second DCI also indicates a starting symbol position of the second resource and the number of symbols of the second resource,

And the number of symbols of the second resource is limited not to exceed the start symbol position of the first resource within a slot containing the first resource.
The method according to claim 11,

Wherein the first DCI and the second DCI are transmitted on respective Physical Downlink Control Channels (PDCCHs).