WO2022075828A1 - 무선 통신 시스템에서 상향링크 채널을 전송하는 방법 및 이를 위한 장치 - Google Patents
무선 통신 시스템에서 상향링크 채널을 전송하는 방법 및 이를 위한 장치 Download PDFInfo
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- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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Definitions
- the present specification relates to a wireless communication system, and to a method for transmitting an uplink channel and an apparatus therefor.
- 5G communication system is called a 4G network after (beyond 4G network) communication system, LTE system after (post LTE) system or NR (new radio) system.
- the 5G communication system includes a system operated by using an ultra-high frequency (mmWave) band of 6 GHz or higher, and a communication system operated using a frequency band of 6 GHz or less in terms of securing coverage Implementation in the base station and the terminal, including
- the 3rd generation partnership project (3GPP) NR system improves the spectral efficiency of the network, enabling carriers to provide more data and voice services in a given bandwidth. Therefore, the 3GPP NR system is designed to meet the demand for high-speed data and media transmission in addition to high-capacity voice support.
- the advantages of NR systems are that they can have low operating costs with high throughput, low latency, frequency division duplex (FDD) and time division duplex (TDD) support, improved end-user experience and simple architecture on the same platform.
- dynamic TDD of the NR system may use a method of varying the number of orthogonal frequency division multiplexing (OFDM) symbols that can be used for uplink and downlink according to the data traffic direction of users of the cell. For example, when the downlink traffic of the cell is greater than the uplink traffic, the base station may allocate a plurality of downlink OFDM symbols to a slot (or subframe). Information on the slot configuration should be transmitted to the terminals.
- OFDM orthogonal frequency division
- an evolved small cell in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud radio access network: cloud RAN), an ultra-dense network (ultra-dense network) , device to device communication (D2D), vehicle to everything communication (V2X), wireless backhaul, non-terrestrial network communication (NTN), mobile network (moving network), cooperative communication (cooperative communication), CoMP (coordinated multi-points), and technology development related to reception interference cancellation (interference cancellation) and the like are being made.
- cloud radio access network cloud radio access network: cloud RAN
- ultra-dense network ultra-dense network
- D2D device to device communication
- V2X vehicle to everything communication
- wireless backhaul wireless backhaul
- NTN non-terrestrial network communication
- mobile network moving network
- cooperative communication cooperative communication
- CoMP coordinated multi-points
- technology development related to reception interference cancellation (interference cancellation) and the like are being made.
- FQAM FSK and QAM modulation
- SWSC sliding window superposition coding
- ACM advanced coding modulation
- FBMC filter bank multi-carrier
- NOMA Non-orthogonal multiple access
- SCMA sparse code multiple access
- IoT Internet of Things
- IoE Internet of Everything
- sensing technology wired and wireless communication and network infrastructure, service interface technology, and security technology
- sensor networks for connection between objects, machine to machine (M2M), Technologies such as MTC (machine type communication) are being studied.
- M2M machine to machine
- MTC machine type communication
- 5G communication system to the IoT network.
- technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) are being implemented by 5G communication technologies such as beamforming, MIMO, and array antenna.
- cloud radio access network cloud RAN
- a mobile communication system has been developed to provide a voice service while ensuring user activity.
- the mobile communication system is gradually expanding its scope not only to voice but also to data services, and has now developed to the extent that it can provide high-speed data services.
- a more advanced mobile communication system is required due to a shortage of resources and users' demand for high-speed service.
- An object of the present specification is to provide a method and an apparatus for transmitting an uplink channel in a wireless communication system.
- the present specification provides a method for transmitting an uplink channel in a wireless communication system and an apparatus therefor.
- a method for transmitting an uplink channel in a wireless communication system comprising: receiving, by a terminal, a system information block 1 (System Information Block1, SIB1) from a base station; transmitting a preamble for a random access procedure to the base station; Receiving a random access response (RAR) to the preamble from the base station, the random access response is a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) transmitted by the terminal to the base station Scheduling contain information; Transmitting the PUSCH based on the random access response to the base station, wherein the SIB1 is a repeated transmission number candidate set including a value for one or more repeated transmission times for performing the repeated transmission of the PUSCH. information, and the random access response includes information indicating any one of the values for the one or more repeated transmission times included in the repeated transmission number candidate set, and the PUSCH is It is characterized in that it is transmitted repeatedly.
- SIB1 System Information Block1, SIB1
- RAR random access response
- PUSCH
- DCI downlink control information
- the method further comprising repeatedly transmitting, to the base station, the retransmission PUSCH based on the DCI, wherein the information for scheduling the retransmission PUSCH includes information on the number of repetitions of the retransmission PUSCH, and repetition of the retransmission PUSCH Information on the number of times is included in the HARQ process number field of the DCI, the retransmission PUSCH is the same as the PUSCH, and the DCI is transmitted by the base station when the base station fails to receive the PUSCH transmitted by the terminal characterized in that
- a terminal for transmitting an uplink channel includes: a transceiver; a processor for controlling the transceiver, wherein the processor receives a system information block 1 (SIB1) from a base station, transmits a preamble for a random access procedure to the base station, and adds to the preamble from the base station to receive a random access response (RAR), the random access response includes information for scheduling a physical uplink shared channel (PUSCH) transmitted by the terminal to the base station, the base station to transmit the PUSCH based on the random access response, and the SIB1 includes information on a set of repeated transmission number candidates including a value for one or more repeated transmission times for performing repeated transmission of the PUSCH, and the The random access response includes information indicating any one of the values for the one or more repeated transmission times included in the repeated transmission number candidate set, and the PUSCH is repeatedly transmitted by the one value do it with
- SIB1 system information block 1
- RAR random access response
- the random access response includes information for scheduling a physical uplink
- the processor receives, from the base station, downlink control information (DCI) including information for scheduling of the retransmission PUSCH, and repeatedly transmits, to the base station, the retransmission PUSCH based on the DCI,
- DCI downlink control information
- the information for scheduling of the retransmission PUSCH includes information on the number of repetitions of the retransmission PUSCH, information on the number of repetitions of the retransmission PUSCH is included in the HARQ process number field of the DCI, and the retransmission PUSCH is the PUSCH and, the DCI is transmitted by the base station when the base station fails to receive the PUSCH transmitted by the terminal.
- the random access response is characterized in that it is a Physical Downlink Shared Channel (PDSCH) including an uplink (UL) grant (UL grant).
- PDSCH Physical Downlink Shared Channel
- UL grant uplink grant
- TDRA Time Domain Resource Assignment
- MCS Modulation Coding Scheme
- TPC Transmission Power Control
- the one value is indicated by at least one Most Significant Bit (MSB) among bits of the MCS field.
- MSB Most Significant Bit
- the one value is indicated by one or more Least Significant Bits (LSBs) among bits of the TPC field.
- LLBs Least Significant Bits
- the SIB1 includes at least one of the preamble-related information and the RACH opportunity, and the PUSCH is transmitted on a resource determined based on at least one of the preamble-related information and the RACH opportunity. do.
- the DCI is scrambled with TC-RNTI, and the format of the DCI is DCI format 0_0.
- Each value for the one or more repeated transmission times is characterized in that it is a power of two.
- Each of the values for the one or more repeated transmission times is 1, 2, 4, and 8.
- the random access response includes a frequency hopping flag indicating whether the PUSCH is frequency hopping, and the PUSCH is based on the one value and the frequency hopping flag in intra-slot frequency hopping or between slots ( inter-slot) frequency hopping.
- the PUSCH When any of the values is 1, if the value of the frequency hopping flag indicates that the PUSCH is frequency hopping, the PUSCH performs intra-slot frequency hopping, and the value of the frequency hopping flag indicates that the PUSCH is When it indicates that frequency hopping is not performed, the PUSCH is characterized in that frequency hopping is not performed.
- the PUSCH When any one of the values is greater than 1, if the value of the frequency hopping flag indicates that the PUSCH is frequency hopping, the PUSCH performs inter-slot frequency hopping, and the value of the frequency hopping flag is the PUSCH indicates that frequency hopping is not performed, the PUSCH is characterized in that frequency hopping is not performed.
- the random access response further includes information on a resource on which the first repeated transmission of the PUSCH is performed, and the information on the resource on which the first repeated transmission of the PUSCH is performed includes the resource on which the random access response is received and the first of the PUSCH.
- a slot offset value between resources on which repeated transmission is performed the SIB1 further includes information related to a time division duplex (TDD) configuration, and the information related to the TDD configuration is information on the type of symbols constituting the slot.
- the types of the symbols are a downlink symbol configured to be usable for downlink transmission, an uplink symbol configured to be usable for uplink transmission, and the downlink symbol or flexible not configured as the uplink symbol.
- the PUSCH is repeatedly transmitted in units of slots
- the resource on which the first repeated transmission of the PUSCH is performed is a resource separated by the slot offset value from the resource from which the random access response is received. .
- the resource on which the first repeated transmission of the PUSCH is performed is a flexible slot, the repeated transmission after the first repeated transmission of the PUSCH is performed on an uplink slot, and the flexible slot is configured to include at least one flexible symbol, and the uplink All of the link slots are composed of the uplink symbols.
- a method for receiving an uplink channel in a wireless communication system comprising: transmitting a system information block 1 (System Information Block1, SIB1) to a terminal; receiving a preamble for a random access procedure from the terminal; Transmitting a random access response (RAR) to the preamble to the terminal, wherein the random access response is a physical uplink shared channel (PUSCH) transmitted by the terminal to the base station Scheduling contain information; Receiving the PUSCH based on the random access response from the terminal, wherein the SIB1 includes a value for one or more repeated transmission times for performing repeated transmission of the PUSCH Information on a candidate set for the number of repeated transmissions Including, the random access response includes information indicating any one of the values for the one or more repeated transmission times included in the repeated transmission number candidate set, and the PUSCH is repeated by any one value It is characterized in that it is transmitted.
- SIB1 System Information Block1
- RAR random access response
- PUSCH physical uplink shared channel
- An object of the present specification is to provide a method for repeatedly transmitting Msg3 PUSCH of a random access procedure.
- An object of the present specification is to provide a method for inter-slot frequency hopping of Msg3 PUSCH that is repeatedly transmitted.
- An object of the present specification is to provide a method for determining a resource through which Msg3 PUSCH is repeatedly transmitted.
- FIG. 1 shows an example of a radio frame structure used in a wireless communication system.
- FIG. 2 shows an example of a downlink (DL)/uplink (UL) slot structure in a wireless communication system.
- 3 is a diagram for explaining a physical channel used in a 3GPP system and a general signal transmission method using the corresponding physical channel.
- 4A and 4B show SS/PBCH blocks for initial cell access in 3GPP NR system.
- 5A and 5B show a procedure for transmitting control information and a control channel in a 3GPP NR system.
- CORESET control resource set
- PDCCH physical downlink control channel
- FIG. 7 is a diagram illustrating a method of configuring a PDCCH search space in a 3GPP NR system.
- FIG. 8 is a conceptual diagram illustrating carrier aggregation.
- 9 is a diagram for explaining single-carrier communication and multi-carrier communication.
- FIG. 10 is a diagram illustrating an example to which a cross-carrier scheduling technique is applied.
- FIG. 11 is a block diagram showing the configurations of a terminal and a base station, respectively, according to an embodiment of the present invention.
- FIG. 12 shows a method of scheduling a shared physical uplink channel in the time domain according to an embodiment of the present invention.
- FIG. 13 illustrates a method for scheduling a shared physical uplink channel in the frequency domain according to an embodiment of the present invention.
- 15 shows a scheduling method of a physical uplink control channel according to an embodiment of the present invention.
- FIG 16 shows repeated transmission of a physical uplink control channel according to an embodiment of the present invention.
- 17 is a diagram illustrating repeated transmission of an Msg3 PUSCH according to an embodiment of the present invention.
- 18 is a diagram illustrating repeated transmission of Msg3 PUSCH using three DMRSs according to an embodiment of the present invention.
- 19 to 21 show a Msg3 PUSCH transmission method using two DMRSs according to an embodiment of the present invention.
- 22 to 26 show a method of determining the number of modulation symbols for multiplexing uplink control information included in Msg3 PUSCH according to an embodiment of the present invention.
- 27 and 28 show resources that can be used for repeated transmission of Msg3 PUSCH according to an embodiment of the present invention.
- 29 shows a method of determining a frequency hopping method according to the number of repeated PUCCH transmissions according to an embodiment of the present invention.
- FIG. 30 is a flowchart illustrating a method for a terminal to transmit an Msg3 PUSCH according to an embodiment of the present invention.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with a radio technology such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- OFDMA may be implemented with a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), and the like.
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3GPP (3rd Generation Partnership Project) long term evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA
- LTE-A Advanced
- 3GPP NR New Radio
- eMBB enhanced Mobile BroadBand
- URLLC Ultra-Reliable and Low Latency Communication
- mMTC massive machine type communication
- the base station may include a next generation node B (gNB) defined in 3GPP NR.
- a terminal may include user equipment (UE).
- UE user equipment
- the configuration of the terminal may indicate the configuration by the base station. Specifically, the base station may transmit a channel or a signal to the terminal to set a value of a parameter used in an operation of the terminal or a wireless communication system.
- FIG. 1 shows an example of a radio frame structure used in a wireless communication system.
- a radio frame (or radio frame) used in a 3GPP NR system may have a length of 10 ms ( ⁇ f max N f / 100) * T c ).
- the radio frame consists of 10 equally sized subframes (subframes, SFs).
- ⁇ f max 480*10 3 Hz
- N f 4096
- T c 1/( ⁇ f ref *N f,ref )
- ⁇ f ref 15*10 3 Hz
- N f,ref 2048.
- 10 subframes in one radio frame may be assigned a number from 0 to 9, respectively.
- a subframe of 1 ms length may consist of 2 ⁇ slots. At this time, the length of each slot is 2 - ⁇ ms. 2 ⁇ slots in one subframe may be numbered from 0 to 2 ⁇ - 1, respectively.
- slots in one radio frame may be assigned a number from 0 to 10*2 ⁇ - 1, respectively.
- the time resource may be divided by at least one of a radio frame number (or also referred to as a radio frame index), a subframe number (or referred to as a subframe index), and a slot number (or a slot index).
- FIG. 2 shows an example of a downlink (DL)/uplink (UL) slot structure in a wireless communication system.
- FIG. 2 shows the structure of a resource grid of a 3GPP NR system.
- a slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain.
- the OFDM symbol also means one symbol interval. Unless otherwise specified, an OFDM symbol may be simply referred to as a symbol.
- One RB includes 12 consecutive subcarriers in the frequency domain. 2
- the signal transmitted in each slot is N size, ⁇ grid, x * N RB sc number of subcarriers (subcarrier) and N slot symb number of OFDM symbols composed of OFDM symbols (resource grid) can be expressed as there is.
- N size, ⁇ grid,x represents the number of resource blocks (RBs) according to the subcarrier interval configuration factor ⁇ (x is DL or UL), and N slot symb represents the number of OFDM symbols in the slot.
- the OFDM symbol may be referred to as a cyclic prefix OFDM (CP-OFDM) symbol or a discrete Fourier transform spread OFDM (DFT-S-OFDM) symbol according to a multiple access scheme.
- the number of OFDM symbols included in one slot may vary according to the length of a cyclic prefix (CP). For example, in the case of a normal CP, one slot may include 14 OFDM symbols, but in the case of an extended CP, one slot may include 12 OFDM symbols. In a specific embodiment, the extended CP may be used only at a 60 kHz subcarrier interval. 2 illustrates a case in which one slot consists of 14 OFDM symbols for convenience of description, embodiments of the present invention may be applied to slots having other numbers of OFDM symbols in the same manner. Referring to FIG. 2 , each OFDM symbol includes N size, ⁇ grid, x * N RB sc subcarriers in the frequency domain. The type of subcarrier may be divided into a data subcarrier for data transmission, a reference signal subcarrier for transmission of a reference signal, and a guard band. The carrier frequency is also referred to as the center frequency (fc).
- fc center frequency
- One RB may be defined by N RB sc (eg, 12) consecutive subcarriers in the frequency domain.
- N RB sc eg, 12
- a resource composed of one OFDM symbol and one subcarrier may be referred to as a resource element (RE) or a tone.
- one RB may be composed of N slot symb * N RB sc resource elements.
- Each resource element in the resource grid may be uniquely defined by an index pair (k, l) in one slot.
- k is an index assigned from 0 to N size, ⁇ grid, x * N RB sc - 1 in the frequency domain
- l may be an index assigned from 0 to N slot symb - 1 in the time domain.
- the time/frequency synchronization of the terminal may need to be aligned with the time/frequency synchronization of the base station. This is because, only when the base station and the terminal are synchronized, the terminal can determine the time and frequency parameters required to perform demodulation of the DL signal and transmission of the UL signal at an accurate time.
- Each symbol of a radio frame operating in time division duplex (TDD) or unpaired spectrum is at least one of a downlink symbol (DL symbol), an uplink symbol (UL symbol), or a flexible symbol (flexible symbol). It may consist of any one.
- a radio frame operating as a downlink carrier may consist of a downlink symbol or a flexible symbol
- a radio frame operating as an uplink carrier may include an uplink symbol or It may be composed of flexible symbols.
- the downlink symbol downlink transmission is possible but uplink transmission is impossible
- uplink symbol uplink transmission is possible but downlink transmission is impossible.
- Whether the flexible symbol is used for downlink or uplink may be determined according to a signal.
- Information on the type of each symbol may be composed of a cell-specific (cell-specific or common) RRC (radio resource control) signal.
- information on the type of each symbol may be additionally configured as a UE-specific (or dedicated, UE-specific) RRC signal.
- the base station uses the cell-specific RRC signal to i) the period of the cell-specific slot configuration, ii) the number of slots with only downlink symbols from the beginning of the period of the cell-specific slot configuration, iii) the slot immediately following the slot with only downlink symbols.
- a symbol that is not composed of either an uplink symbol or a downlink symbol is a flexible symbol.
- the base station may signal whether the flexible symbol is a downlink symbol or an uplink symbol with a cell-specific RRC signal. In this case, the UE-specific RRC signal cannot change the downlink symbol or the uplink symbol composed of the cell-specific RRC signal to another symbol type.
- the UE-specific RRC signal may signal the number of downlink symbols among N slot symb symbols of a corresponding slot and the number of uplink symbols among N slot symb symbols of a corresponding slot for each slot. In this case, the downlink symbol of the slot may be continuously configured from the first symbol of the slot to the i-th symbol.
- the uplink symbol of the slot may be continuously configured from the j-th symbol to the last symbol of the slot (here, i ⁇ j).
- a symbol that is not composed of either an uplink symbol or a downlink symbol in a slot is a flexible symbol.
- a symbol type composed of the above RRC signal may be referred to as a semi-static DL/UL configuration.
- the flexible symbol is a downlink symbol, an uplink symbol through dynamic slot format information (SFI) transmitted through a physical downlink control channel (PDCCH). , or may be indicated by a flexible symbol.
- SFI dynamic slot format information
- PDCH physical downlink control channel
- Table 1 illustrates the dynamic SFI that the base station can indicate to the terminal.
- D denotes a downlink symbol
- U denotes an uplink symbol
- X denotes a flexible symbol.
- DL/UL switching may be allowed up to two times within one slot.
- 3 is a diagram for explaining a physical channel used in a 3GPP system (eg, NR) and a general signal transmission method using the corresponding physical channel.
- a 3GPP system eg, NR
- the terminal When the power of the terminal increases or the terminal enters a new cell, the terminal performs an initial cell search operation (S101). Specifically, the terminal may synchronize with the base station in the initial cell search. To this end, the terminal may receive a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station, synchronize with the base station, and obtain information such as a cell index. Thereafter, the terminal may receive the physical broadcast channel from the base station to obtain broadcast information in the cell.
- PSS primary synchronization signal
- SSS secondary synchronization signal
- the UE After completing the initial cell search, the UE receives a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to information carried on the PDCCH, thereby acquiring through initial cell search. It is possible to obtain more specific system information than one system information (S102).
- the system information received by the terminal is cell-common system information for correctly operating the terminal in a physical layer in RRC (Radio Resource Control, RRC), and is Remaining system information or a system information block. (System information blcok, SIB) 1 is referred to.
- the terminal may perform a random access procedure for the base station (steps S103 to S106).
- the UE transmits a preamble through a physical random access channel (PRACH) (S103), and a random access response (RAR) message to the preamble through a PDCCH and a corresponding PDSCH from the base station. can be received (S104).
- PRACH physical random access channel
- RAR random access response
- the preamble of steps S103 and S104 may be described as message 1 (Msg1)
- the random access response may be described as a response message or message 2 (Msg2).
- the UE When a valid random access response is received from the UE, the UE receives data including its identifier through a physical uplink shared channel (PUSCH) indicated by an uplink grant delivered through PDCCH or PDSCH from the base station. is transmitted to the base station (S105).
- PUSCH physical uplink shared channel
- the data including the identifier and the like in step S105 and the PUSCH including the data may be described as message 3 (Msg3).
- the PUSCH including the data may be described as message 3 PUSCH (Msg3 PUSCH).
- the terminal waits for the reception of the PDCCH as an indication of the base station for collision resolution.
- the random access process ends.
- the PDCCH and PDSCH of step S106 may be described as message 4 (Msg 4).
- the UE may acquire UE-specific system information necessary for the UE to properly operate in the physical layer in the RRC layer during the random access process.
- the terminal obtains terminal-specific system information from the RRC layer, the terminal enters the RRC connected mode (RRC_CONNECTED mode).
- the RRC layer is used for message generation and management for control between the terminal and a radio access network (RAN). More specifically, in the RRC layer, the base station and the terminal broadcast cell system information necessary for all terminals in the cell, delivery management of paging messages, mobility management and handover, measurement report of the terminal and control thereof, terminal Storage management including capacity management and instrument management can be performed. In general, since the update of the signal transmitted from the RRC layer (hereinafter, the RRC signal) is longer than the transmission/reception period (ie, transmission time interval, TTI) in the physical layer, the RRC signal can be maintained unchanged for a long period. there is.
- the RRC signal since the update of the signal transmitted from the RRC layer (hereinafter, the RRC signal) is longer than the transmission/reception period (ie, transmission time interval, TTI) in the physical layer, the RRC signal can be maintained unchanged for a long period. there is.
- the UE receives PDCCH/PDSCH (S107) and a physical uplink shared channel (PUSCH)/physical uplink control channel (PUCCH) as a general uplink/downlink signal transmission procedure. can be transmitted (S108).
- the UE may receive downlink control information (DCI) through the PDCCH.
- DCI may include control information such as resource allocation information for the terminal.
- the format of the DCI may vary depending on the purpose of use.
- the uplink control information (UCI) transmitted by the terminal to the base station through the uplink is a downlink/uplink ACK/NACK signal, a channel quality indicator (CQI), a precoding matrix index (PMI), and a rank indicator (RI). ) and the like.
- CQI channel quality indicator
- PMI precoding matrix index
- RI rank indicator
- CQI, PMI, and RI may be included in CSI (channel state information).
- the UE may transmit control information such as HARQ-ACK and CSI described above through PUSCH and/or PUCCH.
- 4A and 4B show SS/PBCH blocks for initial cell access in 3GPP NR system.
- the terminal When the terminal is powered on or wants to access a cell anew, it may acquire time and frequency synchronization with the cell and perform an initial cell search process.
- the UE may detect the physical cell identity N cell ID of the cell in the cell search process.
- the terminal may receive a synchronization signal, for example, a main synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station to synchronize with the base station.
- PSS main synchronization signal
- SSS secondary synchronization signal
- the terminal may obtain information such as a cell identifier (identity, ID).
- the synchronization signal may be divided into PSS and SSS.
- PSS may be used to obtain time domain synchronization and/or frequency domain synchronization such as OFDM symbol synchronization, slot synchronization.
- SSS may be used to obtain frame synchronization and cell group ID.
- the PSS is transmitted in the first OFDM symbol, and the SSS is transmitted through the 56th to 182th subcarriers in the third OFDM symbol.
- the lowest subcarrier index of the SS/PBCH block is numbered from 0.
- the base station does not transmit a signal through the remaining subcarriers, that is, the 0 to 55 and 183 to 239 subcarriers.
- the base station does not transmit a signal through the 48th to 55th and 183th to 191th subcarriers in the third OFDM symbol in which the SSS is transmitted.
- the base station transmits a physical broadcast channel (PBCH) through the remaining REs except for the above signals in the SS/PBCH block.
- PBCH physical broadcast channel
- each physical layer cell ID is a part of only one physical-layer cell-identifier group.
- the UE may identify one of three unique physical-layer identifiers by detecting the PSS.
- the UE may identify one of 336 physical layer cell IDs associated with the physical-layer identifier by detecting the SSS.
- the sequence d PSS (n) of the PSS is as follows.
- sequence d SSS (n) of the SSS is as follows.
- a radio frame with a length of 10 ms can be divided into two half frames with a length of 5 ms.
- a slot in which an SS/PBCH block is transmitted in each half frame will be described with reference to FIG. 4B.
- the slot in which the SS/PBCH block is transmitted may be any one of cases A, B, C, D, and E.
- the subcarrier interval is 15 kHz
- the start time of the SS/PBCH block is ⁇ 2, 8 ⁇ + 14*nth symbol.
- the subcarrier interval is 30 kHz, and the start time of the SS/PBCH block is ⁇ 4, 8, 16, 20 ⁇ + 28*nth symbol.
- n 0 at a carrier frequency of 3 GHz or less.
- the subcarrier interval is 30 kHz, and the start time of the SS/PBCH block is ⁇ 2, 8 ⁇ + 14*nth symbol.
- the subcarrier interval is 120 kHz, and the start time of the SS/PBCH block is ⁇ 4, 8, 16, 20 ⁇ + 28*nth symbol.
- n 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18 at a carrier frequency of 6 GHz or higher.
- the subcarrier interval is 240 kHz, and the start time of the SS/PBCH block is ⁇ 8, 12, 16, 20, 32, 36, 40, 44 ⁇ + 56*nth symbol.
- the base station may add a cyclic redundancy check (CRC) masked (eg, XOR operation) with a radio network temporary identifier (RNTI) to control information (eg, downlink control information, DCI) (S202) .
- CRC cyclic redundancy check
- RNTI radio network temporary identifier
- the base station may scramble the CRC with an RNTI value determined according to the purpose/target of each control information.
- the common RNTI used by one or more terminals is at least one of a system information RNTI (SI-RNTI), a paging RNTI (P-RNTI), a random access RNTI (RA-RNTI), and a transmit power control RNTI (TPC-RNTI).
- SI-RNTI system information RNTI
- P-RNTI paging RNTI
- RA-RNTI random access RNTI
- TPC-RNTI transmit power control RNTI
- the UE-specific RNTI may include at least one of a cell temporary RNTI (C-RNTI) and a CS-RNTI.
- channel encoding eg, polar coding
- the base station may multiplex DCI(s) based on a control channel element (CCE)-based PDCCH structure (S208).
- the base station may apply an additional process (S210) such as scrambling, modulation (eg, QPSK), interleaving, etc. to the multiplexed DCI(s), and then map the multiplexed DCI(s) to a resource to be transmitted.
- a CCE is a basic resource unit for a PDCCH, and one CCE may consist of a plurality (eg, six) of a resource element group (REG). One REG may consist of a plurality (eg, 12) of REs.
- the number of CCEs used for one PDCCH may be defined as an aggregation level.
- FIG. 5B is a diagram related to CCE aggregation level and PDCCH multiplexing, and shows types of CCE aggregation levels used for one PDCCH and CCE(s) transmitted in a control region accordingly.
- CORESET control resource set
- PDCCH physical downlink control channel
- CORESET is a time-frequency resource through which PDCCH, which is a control signal for a terminal, is transmitted.
- a search space to be described later may be mapped to one CORESET. Therefore, the UE can decode the PDCCH mapped to the CORESET by monitoring the time-frequency domain designated as CORESET, rather than monitoring all frequency bands for PDCCH reception.
- the base station may configure one or a plurality of CORESETs for each cell to the terminal.
- CORESET may consist of up to three consecutive symbols on the time axis.
- CORESET may be configured in units of 6 consecutive PRBs on the frequency axis. In the embodiment of FIG.
- CORESET#1 consists of continuous PRBs
- CORESET#2 and CORESET#3 consist of discontinuous PRBs.
- CORESET may be located in any symbol within a slot. For example, in the embodiment of Figure 6, CORESET#1 starts at the first symbol of the slot, CORESET#2 starts at the 5th symbol of the slot, and CORESET#9 starts at the 9th symbol of the slot.
- FIG. 7 is a diagram illustrating a method of configuring a PDCCH search space in a 3GPP NR system.
- the search space is a set of all time-frequency resources (hereinafter, PDCCH candidates) through which the PDCCH of the UE can be transmitted.
- the search space may include a common search space that a terminal of 3GPP NR searches for and a terminal-specific or UE-specific search space that a specific terminal searches for.
- the common search space it is possible to monitor the PDCCH configured to be commonly found by all terminals in the cell belonging to the same base station.
- the UE-specific search space may be configured for each UE so that the PDCCH allocated to each UE can be monitored in different search space positions depending on the UE.
- search spaces between terminals may be allocated partially overlapping each other.
- Monitoring the PDCCH includes blind decoding of PDCCH candidates in the search space.
- a case in which blind decoding is successful can be expressed as that the PDCCH is detected/received (successfully), and a case in which blind decoding has failed can be expressed as non-detection/non-receipt of the PDCCH or not detected/received successfully.
- a PDCCH scrambled with a group common (GC) RNTI already known by one or more terminals is a group common (GC) PDCCH or common. It is referred to as PDCCH.
- a PDCCH scrambled with a UE-specific RNTI that a specific UE already knows is referred to as a UE-specific PDCCH.
- the common PDCCH may be included in the common search space, and the UE-specific PDCCH may be included in the common search space or the UE-specific PDCCH.
- the base station transmits information related to resource allocation of a paging channel (PCH) and a downlink-shared channel (DL-SCH) through the PDCCH (ie, DL Grant) or resource allocation and HARQ of an uplink-shared channel (UL-SCH).
- Information ie, UL grant) related to (hybrid automatic repeat request) may be informed to each UE or UE group.
- the base station may transmit the PCH transport block and the DL-SCH transport block through the PDSCH.
- the base station may transmit data excluding specific control information or specific service data through the PDSCH.
- the UE may receive data excluding specific control information or specific service data through the PDSCH.
- the base station may transmit information on which terminal (one or a plurality of terminals) the PDSCH data is transmitted to and how the corresponding terminal should receive and decode the PDSCH data by including it in the PDCCH.
- DCI transmitted through a specific PDCCH is CRC-masked with an RNTI of "A”
- the DCI indicates that the PDSCH is allocated to a radio resource (eg, frequency location) of "B”
- "C indicates transmission format information (eg, transport block size, modulation method, coding information, etc.).
- the UE monitors the PDCCH using its own RNTI information.
- the corresponding terminal receives the PDCCH, and receives the PDSCH indicated by "B" and "C" through the received PDCCH information.
- Table 3 shows an embodiment of a physical uplink control channel (PUCCH) used in a wireless communication system.
- PUCCH physical uplink control channel
- the PUCCH may be used to transmit the following uplink control information (UCI).
- UCI uplink control information
- HARQ-ACK A response to a PDCCH (indicating DL SPS release) and/or a response to a downlink transport block (TB) on the PDSCH.
- HARQ-ACK indicates whether the reception of information transmitted through the PDCCH or PDSCH is successful.
- the HARQ-ACK response includes positive ACK (simply, ACK), negative ACK (hereinafter, NACK), DTX (Discontinuous Transmission), or NACK/DTX.
- NACK negative ACK
- DTX discontinuous Transmission
- NACK/DTX NACK/DTX.
- HARQ-ACK is used interchangeably with HARQ-ACK/NACK and ACK/NACK.
- ACK may be expressed as bit value 1
- NACK may be expressed as bit value 0.
- CSI Channel State Information: feedback information for a downlink channel.
- the terminal is generated based on the CSI-RS (Reference Signal) transmitted by the base station.
- Multiple Input Multiple Output (MIMO)-related feedback information includes a Rank Indicator (RI) and a Precoding Matrix Indicator (PMI).
- RI Rank Indicator
- PMI Precoding Matrix Indicator
- CSI may be divided into CSI part 1 and CSI part 2 according to information indicated by the CSI.
- five PUCCH formats may be used to support various service scenarios, various channel environments, and frame structures.
- PUCCH format 0 is a format capable of transmitting 1-bit or 2-bit HARQ-ACK information or SR.
- PUCCH format 0 may be transmitted through one or two OFDM symbols on the time axis and one PRB on the frequency axis.
- the sequence may be a cyclic shift (CS) sequence from a base sequence used for PUCCH format 0.
- the terminal can obtain a frequency diversity gain.
- a sequence obtained by cyclic shifting of a base sequence having a length of 12 based on a predetermined CS value m cs may be mapped to one OFDM symbol and 12 REs of one RB and transmitted.
- M bit 1
- 1-bit UCI 0 and 1 may be mapped to two cyclic shifted sequences having a difference of 6 cyclic shift values, respectively.
- PUCCH format 1 may carry 1-bit or 2-bit HARQ-ACK information or SR.
- PUCCH format 1 may be transmitted through consecutive OFDM symbols on the time axis and one PRB on the frequency axis.
- the number of OFDM symbols occupied by PUCCH format 1 may be one of 4 to 14.
- QPSK quadrature phase shift keying
- a signal is obtained by multiplying a modulated complex valued symbol d(0) by a sequence of length 12.
- the sequence may be a base sequence used for PUCCH format 0.
- the UE spreads the obtained signal in an even-numbered OFDM symbol to which PUCCH format 1 is allocated as a time axis orthogonal cover code (OCC) and transmits it.
- OCC time axis orthogonal cover code
- PUCCH format 1 the maximum number of different UEs multiplexed to the same RB is determined according to the length of the OCC used.
- a demodulation reference signal (DMRS) may be spread and mapped to odd-numbered OFDM symbols of PUCCH format 1 as OCC.
- PUCCH format 2 may carry more than 2 bits of UCI.
- PUCCH format 2 may be transmitted through one or two OFDM symbols on a time axis and one or a plurality of RBs on a frequency axis.
- the same sequence may be transmitted on different RBs through the two OFDM symbols.
- the sequence is a plurality of modulated complex symbols d(0), ... , d (M symbol -1).
- M symbol may be M bit /2.
- the terminal can obtain a frequency diversity gain. More specifically, M bit bit UCI (M bit >2) is bit-level scrambled, QPSK modulated and mapped to RB(s) of one or two OFDM symbol(s).
- the number of RBs may be one of 1 to 16.
- PUCCH format 3 or PUCCH format 4 may carry more than 2 bits of UCI.
- PUCCH format 3 or PUCCH format 4 may be transmitted through consecutive OFDM symbols on the time axis and one PRB on the frequency axis.
- the number of OFDM symbols occupied by PUCCH format 3 or PUCCH format 4 may be one of 4 to 14.
- the UE modulates M bit UCI (M bit >2) with ⁇ /2-BPSK (Binary Phase Shift Keying) or QPSK to generate complex symbols d(0) to d(M symb -1). .
- M symb M bit
- QPSK QPSK
- the UE may not apply block-unit spreading to PUCCH format 3. However, the UE uses a PreDFT-OCC of length-12 length so that the PUCCH format 4 can have 2 or 4 multiplexing capacity in 1 RB (ie, 12 subcarriers) block-unit spreading can be applied.
- the UE may transmit precoding (or DFT-precoding) the spread signal and map it to each RE to transmit the spread signal.
- the number of RBs occupied by PUCCH format 2, PUCCH format 3, or PUCCH format 4 may be determined according to the length of UCI transmitted by the UE and the maximum code rate.
- the UE may transmit HARQ-ACK information and CSI information together through PUCCH. If the number of RBs that the UE can transmit is greater than the maximum number of RBs available for PUCCH format 2, PUCCH format 3, or PUCCH format 4, the UE does not transmit some UCI information according to the priority of UCI information and does not transmit the remaining UCI Only information can be transmitted.
- PUCCH format 1, PUCCH format 3, or PUCCH format 4 may be configured through an RRC signal to indicate frequency hopping in a slot.
- an index of an RB to be frequency hopping may be configured as an RRC signal.
- PUCCH format 1, PUCCH format 3, or PUCCH format 4 is transmitted over N OFDM symbols in the time axis, the first hop has floor (N/2) OFDM symbols and the second hop is ceil ( It may have N/2) OFDM symbols.
- PUCCH format 1, PUCCH format 3, or PUCCH format 4 may be configured to be repeatedly transmitted in a plurality of slots.
- the number K of slots in which the PUCCH is repeatedly transmitted may be configured by the RRC signal.
- the repeatedly transmitted PUCCH should start from an OFDM symbol at the same position in each slot and have the same length. If any one OFDM symbol among the OFDM symbols of the slot in which the UE should transmit the PUCCH is indicated as a DL symbol by the RRC signal, the UE may transmit the PUCCH by delaying it to the next slot without transmitting the PUCCH in the corresponding slot.
- the UE may perform transmission/reception using a bandwidth equal to or smaller than the bandwidth of a carrier (or cell).
- the terminal may be configured with a bandwidth part (BWP) composed of a continuous bandwidth of a part of the bandwidth of the carrier.
- BWP bandwidth part
- a UE operating according to TDD or operating in an unpaired spectrum may be configured with up to four DL/UL BWP pairs in one carrier (or cell). Also, the UE may activate one DL/UL BWP pair.
- a terminal operating according to FDD or operating in a paired spectrum may be configured with up to four DL BWPs on a downlink carrier (or cell) and up to four UL BWPs on an uplink carrier (or cell) can be configured.
- the UE may activate one DL BWP and one UL BWP for each carrier (or cell).
- the UE may not receive or transmit in time-frequency resources other than the activated BWP.
- the activated BWP may be referred to as an active BWP.
- the base station may indicate the activated BWP among the BWPs configured by the terminal through downlink control information (DCI). BWP indicated through DCI is activated, and other configured BWP(s) are deactivated.
- the base station may include a bandwidth part indicator (BPI) indicating the activated BWP in DCI scheduling PDSCH or PUSCH to change the DL/UL BWP pair of the terminal.
- BPI bandwidth part indicator
- the UE may receive a DCI scheduling a PDSCH or a PUSCH and identify an activated DL/UL BWP pair based on the BPI.
- the base station may include the BPI indicating the activated BWP in the DCI scheduling the PDSCH to change the DL BWP of the terminal.
- the base station may include the BPI indicating the activated BWP in the DCI scheduling the PUSCH to change the UL BWP of the terminal.
- FIG. 8 is a conceptual diagram illustrating carrier aggregation.
- the terminal uses a plurality of frequency blocks or (logical meaning) cells composed of uplink resources (or component carriers) and/or downlink resources (or component carriers). It means how to use it as one large logical frequency band.
- One component carrier may also be referred to as a primary cell (PCell), a secondary cell (SCell), or a primary SCell (PScell).
- PCell primary cell
- SCell secondary cell
- PScell primary SCell
- the entire system band may include up to 16 component carriers, and each component carrier may have a bandwidth of up to 400 MHz.
- a component carrier may include one or more physically contiguous subcarriers. 8 shows that each component carrier has the same bandwidth, but this is only an example and each component carrier may have a different bandwidth.
- each component carrier is illustrated as being adjacent to each other on the frequency axis, the figure is illustrated in a logical concept, and each component carrier may be physically adjacent to each other or may be separated from each other.
- a different center frequency may be used in each component carrier.
- one center frequency common to physically adjacent component carriers may be used.
- the center frequency A may be used in all component carriers.
- the center frequency A and the center frequency B may be used in each component carrier.
- a frequency band used for communication with each terminal may be defined in units of component carriers.
- Terminal A can use 100 MHz, which is the entire system band, and performs communication using all five component carriers.
- Terminals B 1 to B 5 can use only a 20 MHz bandwidth and perform communication using one component carrier.
- Terminals C 1 and C 2 may use a 40 MHz bandwidth and perform communication using two component carriers, respectively. Two component carriers may or may not be logically/physically adjacent. In the embodiment of FIG. 8 , the UE C 1 uses two non-adjacent component carriers and the UE C 2 uses two adjacent component carriers.
- FIG. 9 is a diagram for explaining single carrier communication and multi-carrier communication.
- FIG. 9(a) shows a subframe structure of a single carrier
- FIG. 9(b) shows a subframe structure of a multi-carrier.
- a general wireless communication system may perform data transmission or reception through one DL band and one UL band corresponding thereto.
- the wireless communication system divides a radio frame into an uplink time unit and a downlink time unit in the time domain, and may transmit or receive data through the uplink/downlink time unit.
- a bandwidth of 60 MHz may be supported by collecting three 20 MHz component carriers (CCs) in UL and DL, respectively. Each of the CCs may be adjacent to or non-adjacent to each other in the frequency domain.
- CCs component carriers
- a DL/UL CC allocated/configured to a specific UE through RRC may be referred to as a serving DL/UL CC of a specific UE.
- the base station may communicate with the terminal by activating some or all of the serving CCs of the terminal or by deactivating some CCs.
- the base station may change activated/deactivated CCs, and may change the number of activated/deactivated CCs. If the base station allocates the available CCs to the terminal in a cell-specific or terminal-specific manner, unless the CC allocation to the terminal is completely reconfigured or the terminal is handover, at least one of the CCs once allocated is not deactivated.
- PCC primary CC
- SCC secondary CC
- SCell secondary cell
- a cell is defined as a combination of downlink and uplink resources, that is, a combination of DL CC and UL CC.
- a cell may be configured with a DL resource alone or a combination of a DL resource and a UL resource.
- linkage between the carrier frequency of the DL resource (or DL CC) and the carrier frequency of the UL resource (or UL CC) may be indicated by system information.
- the carrier frequency means the center frequency of each cell or CC.
- a cell corresponding to the PCC is referred to as a PCell, and a cell corresponding to the SCC is referred to as an SCell.
- a carrier corresponding to the PCell in the downlink is a DL PCC
- a carrier corresponding to the PCell in the uplink is a UL PCC
- a carrier corresponding to the SCell in the downlink is a DL SCC
- a carrier corresponding to the SCell in the uplink is a UL SCC.
- the serving cell(s) may be composed of one PCell and zero or more SCells. For a UE that is in the RRC_CONNECTED state but does not have carrier aggregation configured or does not support carrier aggregation, there is only one serving cell configured only with PCell.
- the term "cell” used in carrier aggregation is distinguished from the term "cell” that refers to a certain geographic area in which a communication service is provided by one base station or one antenna group. That is, one component carrier may also be referred to as a scheduling cell, a scheduled cell, a primary cell (PCell), a secondary cell (SCell), or a primary SCell (PScell).
- a cell of carrier aggregation is referred to as a CC
- a cell in the geographic area is referred to as a cell.
- the control channel transmitted through the first CC may schedule the data channel transmitted through the first CC or the second CC using a carrier indicator field (CIF).
- CIF is contained within DCI.
- a scheduling cell is configured, and the DL grant/UL grant transmitted in the PDCCH region of the scheduling cell schedules the PDSCH/PUSCH of the scheduled cell. That is, a search region for a plurality of component carriers exists in the PDCCH region of the scheduling cell.
- a PCell is basically a scheduling cell, and a specific SCell may be designated as a scheduling cell by a higher layer.
- DL component carrier #0 is a DL PCC (or PCell)
- DL component carrier #1 and DL component carrier #2 are DL SCC (or SCell).
- the DL PCC is set as the PDCCH monitoring CC. If cross-carrier scheduling is not configured by UE-specific (or UE-group-specific or cell-specific) higher layer signaling, CIF is disabled, and each DL CC has its own without CIF according to the NR PDCCH rule. Only the PDCCH scheduling the PDSCH can be transmitted (non-cross-carrier scheduling, self-carrier scheduling).
- cross-carrier scheduling is configured by UE-specific (or UE-group-specific or cell-specific) higher layer signaling
- CIF is enabled, and a specific CC (eg, DL PCC) uses the CIF.
- a specific CC eg, DL PCC
- the PDCCH scheduling the PDSCH of DL CC A but also the PDCCH scheduling the PDSCH of another CC may be transmitted (cross-carrier scheduling).
- the PDCCH is not transmitted in other DL CCs. Therefore, the terminal receives the self-carrier scheduled PDSCH by monitoring the PDCCH not including the CIF depending on whether cross-carrier scheduling is configured for the terminal, or receives the cross-carrier scheduled PDSCH by monitoring the PDCCH including the CIF. .
- FIGS. 9 and 10 exemplify the subframe structure of the 3GPP LTE-A system
- the same or similar configuration may be applied to the 3GPP NR system.
- the subframes of FIGS. 9 and 10 may be replaced with slots.
- FIG. 11 is a block diagram showing the configurations of a terminal and a base station, respectively, according to an embodiment of the present invention.
- the terminal may be implemented as various types of wireless communication devices or computing devices that ensure portability and mobility.
- a UE may be referred to as User Equipment (UE), a Station (STA), or a Mobile Subscriber (MS).
- UE User Equipment
- STA Station
- MS Mobile Subscriber
- the base station controls and manages cells (eg, macro cells, femto cells, pico cells, etc.) corresponding to the service area, and performs signal transmission, channel designation, channel monitoring, self-diagnosis, relay, etc. function can be performed.
- the base station may be referred to as a next generation node (gNB) or an access point (AP).
- gNB next generation node
- AP access point
- the terminal 100 may include a processor 110 , a communication module 120 , a memory 130 , a user interface unit 140 , and a display unit 150 . there is.
- the processor 110 may execute various commands or programs and process data inside the terminal 100 .
- the processor 110 may control the overall operation including each unit of the terminal 100 , and may control data transmission/reception between the units.
- the processor 110 may be configured to perform an operation according to the embodiment described in the present invention.
- the processor 110 may receive the slot configuration information, determine the slot configuration based on the received slot configuration information, and perform communication according to the determined slot configuration.
- the communication module 120 may be an integrated module that performs wireless communication using a wireless communication network and wireless LAN access using a wireless LAN.
- the communication module 120 may include a plurality of network interface cards (NIC), such as the cellular communication interface cards 121 and 122 and the unlicensed band communication interface card 123, in an internal or external form.
- NIC network interface cards
- each network interface card may be independently disposed according to a circuit configuration or use, unlike the drawing.
- the cellular communication interface card 121 transmits and receives a wireless signal to and from at least one of the base station 200 , an external device, and a server using a mobile communication network, and based on a command from the processor 110 , a cellular communication service using a first frequency band can provide
- the cellular communication interface card 121 may include at least one NIC module using a frequency band of less than 6 GHz. At least one NIC module of the cellular communication interface card 121 independently communicates with at least one of the base station 200, an external device, and a server according to a cellular communication standard or protocol of a frequency band of less than 6 GHz supported by the corresponding NIC module. can be performed.
- the cellular communication interface card 122 transmits and receives a wireless signal to and from at least one of the base station 200, an external device, and a server using a mobile communication network, and based on a command of the processor 110, a cellular communication service using a second frequency band can provide
- the cellular communication interface card 122 may include at least one NIC module using a frequency band of 6 GHz or higher. At least one NIC module of the cellular communication interface card 122 independently performs cellular communication with at least one of the base station 200, an external device, and a server according to a cellular communication standard or protocol of a frequency band of 6 GHz or higher supported by the corresponding NIC module. can be done
- the unlicensed band communication interface card 123 transmits and receives a wireless signal with at least one of the base station 200, an external device, and a server using a third frequency band that is an unlicensed band, and based on a command of the processor 110, the Provides communication services.
- the unlicensed band communication interface card 123 may include at least one NIC module using the unlicensed band.
- the unlicensed band may be a band of 2.4 GHz, 5 GHz, 6 GHz, 7 GHz, or 52.6 GHz or higher.
- At least one NIC module of the unlicensed band communication interface card 123 is independently or subordinately dependent on at least one of the base station 200, external device, and server according to the unlicensed band communication standard or protocol of the frequency band supported by the NIC module. Wireless communication can be performed.
- the memory 130 stores a control program used in the terminal 100 and various data corresponding thereto.
- the control program may include a predetermined program required for the terminal 100 to perform wireless communication with at least one of the base station 200, an external device, and a server.
- the user interface 140 includes various types of input/output means provided in the terminal 100 . That is, the user interface 140 may receive a user input using various input means, and the processor 110 may control the terminal 100 based on the received user input. In addition, the user interface 140 may perform an output based on a command of the processor 110 using various output means.
- the display unit 150 outputs various images on the display screen.
- the display unit 150 may output various display objects such as content executed by the processor 110 or a user interface based on a control command of the processor 110 .
- the base station 200 may include a processor 210 , a communication module 220 , and a memory 230 .
- the processor 210 may execute various commands or programs and process data inside the base station 200 .
- the processor 210 may control the overall operation including each unit of the base station 200 , and may control data transmission/reception between the units.
- the processor 210 may be configured to perform an operation according to the embodiment described in the present invention.
- the processor 210 may signal slot configuration information and perform communication according to the signaled slot configuration.
- the communication module 220 may be an integrated module that performs wireless communication using a wireless communication network and wireless LAN access using a wireless LAN.
- the communication module 220 may include a plurality of network interface cards such as the cellular communication interface cards 221 and 222 and the unlicensed band communication interface card 223 in an internal or external form.
- each network interface card may be independently disposed according to a circuit configuration or use, unlike the drawing.
- the cellular communication interface card 221 transmits/receives a wireless signal to and from at least one of the above-described terminal 100, an external device, and a server using a mobile communication network, and based on a command from the processor 210, the Communication services can be provided.
- the cellular communication interface card 221 may include at least one NIC module using a frequency band of less than 6 GHz. At least one NIC module of the cellular communication interface card 221 independently communicates with at least one of the terminal 100, an external device, and a server according to a cellular communication standard or protocol of a frequency band of less than 6 GHz supported by the corresponding NIC module. can be performed.
- the cellular communication interface card 222 transmits and receives a wireless signal to and from at least one of the terminal 100, an external device, and a server using a mobile communication network, and based on a command of the processor 210, a cellular communication service using a second frequency band can provide
- the cellular communication interface card 222 may include at least one NIC module using a frequency band of 6 GHz or higher. At least one NIC module of the cellular communication interface card 222 independently performs cellular communication with at least one of the terminal 100, an external device, and a server according to a cellular communication standard or protocol of a frequency band of 6 GHz or higher supported by the corresponding NIC module. can be done
- the unlicensed band communication interface card 223 transmits and receives a wireless signal with at least one of the terminal 100, an external device, and a server using a third frequency band that is an unlicensed band, and based on a command of the processor 210, the unlicensed band Provides communication services.
- the unlicensed band communication interface card 223 may include at least one NIC module using the unlicensed band.
- the unlicensed band may be a band of 2.4 GHz, 5 GHz, 6 GHz, 7 GHz, or 52.6 GHz or higher.
- At least one NIC module of the unlicensed band communication interface card 223 is independently or dependently connected to at least one of the terminal 100, an external device, and a server according to the unlicensed band communication standard or protocol of the frequency band supported by the NIC module. Wireless communication can be performed.
- the terminal 100 and the base station 200 shown in FIG. 11 are block diagrams according to an embodiment of the present invention. Separately indicated blocks are logically separated and illustrated for device elements. Accordingly, the elements of the above-described device may be mounted as one chip or a plurality of chips according to the design of the device. In addition, some components of the terminal 100 , for example, the user interface 140 and the display unit 150 may be selectively provided in the terminal 100 . In addition, the user interface 140 and the display unit 150 may be additionally provided in the base station 200 as necessary.
- FIG. 12 shows a method of scheduling a shared physical uplink channel in the time domain according to an embodiment of the present invention.
- the terminal may transmit uplink data through PUSCH to the base station.
- the base station may schedule (PUSCH scheduling) to transmit uplink data through PUSCH to the terminal.
- PUSCH scheduling In the dynamic grant (DG) method, the base station may perform PUSCH scheduling through DCI included in the PDCCH.
- CG configured grant
- the UE in a configured grant (CG) method, the UE may transmit uplink data to the base station through PUSCH according to the resource and transmission method previously set by the base station to the UE.
- the DCI included in the PDCCH may include PUSCH scheduling information.
- the DCI may include information on the time domain (time-domain resource assignment, TDRA) and information on the frequency domain (frequency-domain resource assignment, FDRA).
- the UE may receive DCI transmitted in the control resource set and the search space, and may perform operations indicated through DCI (eg, transmit uplink data through PUSCH).
- the format of DCI for PUSCH scheduling may be DCI formats 0_0, 0_1, and 0_2.
- DCI of DCI formats 0_0, 0_1, and 0_2 may be configured to include a TDRA field including time domain information of PUSCH.
- the time domain information may include K2, which is an offset value between a slot in which the PDCCH is transmitted from the base station and a slot in which the UE transmits the PUSCH.
- DCI may include a start and length indication value (SLIV), which is a joint coded value of the start symbol index (S) of the PUSCH and the symbol length (L, number) of the PUSCH within the slot indicated by K2. there is.
- ⁇ PUSCH and ⁇ PDCCH may refer to a subcarrier spacing (SCS) of a cell in which a PUSCH is scheduled and a cell in which the UE receives the PDCCH, respectively.
- SCS subcarrier spacing
- floor(x) is a function that returns the largest integer among integers less than or equal to x.
- slot n may mean a slot indexed by index n.
- the subcarrier interval (subcarrier interval) of the cell in which the UE receives the PDCCH and the cell in which the PUSCH is scheduled may be the same.
- the slot in which the PUSCH is scheduled may be slot n+K2, that is, slot n+4.
- PUSCH scheduling There may be two types of PUSCH scheduling, a PUSCH mapping type A and a PUSCH mapping type B.
- the range of values that can be the start symbol index of the PUSCH and the SLIV may vary.
- PUSCH mapping type A only resource allocation including a DMRS symbol is possible, and the DMRS symbol may be located in the third or fourth symbol of the slot according to a value indicated by a higher layer. That is, in the case of PUSCH mapping type A, the index (S) of the start symbol of the PUSCH is 0, and the length (L) of the PUSCH may have one of values from 4 to 14 (12 in the case of extended CP) depending on the DMRS symbol position. .
- the first symbol of PUSCH may be a DMRS symbol.
- S may have one of values from 0 to 13 (11 for extended CP) and L from 1 to 14 (12 for extended CP).
- the sum of S and L must be less than or equal to 14 (12 in the case of extended CP).
- the base station has a PUSCH mapping type A in which the third symbol is a DMRS symbol, the index (S) of the start symbol is 0, and the length (L) is 7, and the fourth symbol is a DMRS symbol and the index of the start symbol ( It is possible to schedule PUSCH mapping type A in which S) is 0 and length (L) is 7, and PUSCH mapping type B in which the first symbol is a DMRS symbol, index (S) of a start symbol is 5, and length (L) is 5.
- the frequency domain information of the PUSCH indicated in the FDRA field of DCI formats 0_0, 0_1, and 0_2 may be divided into two types according to the frequency resource allocation type.
- FIG. 13 illustrates a method for scheduling a shared physical uplink channel in the frequency domain according to an embodiment of the present invention.
- the first type, frequency resource allocation type 0 (type 0), configures an RBG by bundling a certain number of PRBs according to the number of RBs included in the BWP configured (configured) for the UE, and a bitmap in RBG units It may be a type indicating whether to use RBG through . That is, the terminal may determine whether to use the corresponding RBG through the bitmap transmitted from the base station.
- the number of PRBs included in one RBG may be set (configured) from a higher layer, and the greater the number of RBs included in the BWP configured (configured) for the terminal, the more PRBs can be set (configured). . Referring to FIG.
- the BWP size configured (configured) for the UE is 72 PRBs, and one RBG may consist of 4 PRBs.
- the UE determines four PRBs as one RBG in ascending order from PRB 0, and each RBG may be indexed from 0. That is, RBGs composed of PRB 0 to PRB 3 may be indexed as RBG 0, and RBGs composed of PRB 4 through PRB 7 may be indexed as RBG 1.
- RBG 17 can be indexed in the same way, at this time, the base station transmits 1 bit (0 or 1) for each RBG, a total of 18 bits, to the terminal, and the terminal configures the corresponding RBG based on the received 18 bits. Whether to use PRB can be determined.
- the second type, frequency resource allocation type 1 may be a type indicating information on consecutive PRBs allocated according to the size of an initial BWP or an active BWP of the terminal.
- the information of consecutive PRBs may be a resource indication value (RIV) value in which the start index (S) and length (L) of the consecutive PRBs are jointly coded.
- the start index of consecutive PRBs may be 2 and the length may be 10.
- the UE may be configured to use either one of the two frequency resource allocation types described above or to dynamically use the two types from a higher layer.
- the terminal can determine which type is through 1 bit of the most significant bit (MSB) of the FDRA field of DCI.
- the uplink shared channel transmission method based on the configured grant may be described as grant-free transmission.
- the terminal uses the configured resource to transmit the uplink shared channel It may be a method of transmission.
- the uplink shared channel transmission method based on the configured grant may be divided into two types depending on whether DCI indicates activation and release. i)
- the uplink shared channel transmission method based on the type 1 configured grant may be a method of setting resources and a transmission method through a higher layer in advance.
- the grant-based transmission configured through a higher layer is configured, and the resource and method for actual transmission may be a method configured by DCI.
- the uplink transmission method based on the configured grant may support URLLC transmission. Accordingly, uplink transmission may be repeatedly performed on a plurality of slots to ensure high reliability.
- the redundancy version (RV) sequence may be one of ⁇ 0, 0, 0, 0 ⁇ , ⁇ 0, 2, 3, 1 ⁇ , ⁇ 0, 3, 0, 3 ⁇ , and in the n-th repeated transmission
- the RV corresponding to the mod(n-1, 4)+1th value may be used. That is, RV corresponding to a value obtained by adding 1 to the remainder of dividing n-1 by 4 may be used.
- a terminal configured to repeatedly transmit an uplink channel may start repeated transmission only in a slot having an RV value of 0.
- the UE cannot start repetitive transmission in the 8th slot.
- the UE may end repeated transmission when the number of repeated transmissions set through the upper layer is reached or when the period is exceeded, or when a UL grant having the same HARQ process ID is received.
- the UL grant may refer to DCI for scheduling PUSCH.
- the base station may be configured to repeatedly transmit the PUSCH to the terminal.
- PUSCH repeated transmission type A There may be two types of repeated PUSCH transmission performed by the UE. i) First, PUSCH repeated transmission type A will be described.
- the UE may repeatedly transmit the PUSCH in K consecutive slots.
- the K value may be set from a higher layer or may be a value that is included in the TDRA field of DCI and set for the UE.
- the UE may receive a PDCCH for scheduling a PUSCH in slot n, and may receive a K2 value set from DCI included in the received PDCCH.
- the UE may start repeated PUSCH transmission in slot n+K2 and repeatedly transmit PUSCH until slot n+K2+K-1. That is, the UE starts repeatedly transmitting the PUSCH at n+2 and repeatedly transmits the PUSCH until n+5.
- resources in the time and frequency domains in which the PUSCH is transmitted in each slot may be the same as those indicated in DCI. That is, the PUSCH may be transmitted in the same symbol and PRB(s) in the slot. ii) Next, PUSCH repeated transmission type B will be described.
- PUSCH repeated transmission type B may be a type used to repeatedly transmit a low-delay PUSCH for the UE to satisfy the requirements of URLLC.
- the terminal may receive a symbol (S) from which repeated transmission of the PUSCH starts and the length (L) of the repeatedly transmitted PUSCH through the TDRA field of the DCI transmitted by the base station.
- the start symbol (S) and the length (L) may be for a nominal PUSCH (nominal PUSCH) obtained temporarily instead of an actual PUSCH (actual PUSCH) actually transmitted by the UE.
- a separate symbol may not exist between nominal PUSCHs configured to be repeatedly transmitted. That is, the nominal PUSCHs may be contiguous in the time domain.
- the UE may determine the actual PUSCH from the nominal PUSCHs.
- One nominal PUSCH may be determined as one or a plurality of actual PUSCHs.
- the base station may configure symbols that cannot be used in PUSCH repeated transmission type B to the terminal. Symbols that cannot be used in PUSCH repeated transmission type B may be described as invalid symbols.
- the UE may exclude an invalid symbol from among resources configured to transmit nominal PUSCHs.
- nominal PUSCHs are configured to be repeatedly transmitted on consecutive symbols, but when an invalid symbol is excluded, resources for nominal PUSCH transmission become discontinuous.
- the actual PUSCH may be configured to be transmitted on consecutive symbols configured for one nominal PUSCH transmission except for an invalid symbol.
- the UE may be scheduled for PUSCH transmission with a length of 5 symbols from the 12th symbol of the first slot (slot n), and may receive type B repeated transmissions 4 times.
- the resource on which the first nominal PUSCH (nominal#1) is scheduled is a symbol (n,11), a symbol (n,12), a symbol (n,13), a symbol (n+1,0), a symbol (n+1) , 1) may be included.
- the resource on which the second nominal PUSCH (nominal#2) is scheduled is a symbol (n+1,2), a symbol (n+1,3), a symbol (n+1,4), a symbol (n+1,5), a symbol (n+1,6).
- the resource on which the third nominal PUSCH (nominal#3) is scheduled is a symbol (n+1,7), a symbol (n+1,8), a symbol (n+1,9), a symbol (n+1,10), a symbol (n+1,11) may be included.
- the resource on which the fourth nominal PUSCH (nominal#4) is scheduled is a symbol (n+1,12), a symbol (n+1,13), a symbol (n+2,0), a symbol (n+2,1), a symbol It may contain (n+2,2).
- the symbol (n,k) represents the symbol k of the slot n. That is, k may be a value from 0 to 13 in the case of a normal CP, and may be a value from 0 to 11 in the case of an extended CP. Invalid symbols may be set to symbol 6 and symbol 7 of slot n+1.
- the last symbol of the second nominal PUSCH (nominal#2) may be excluded and the first symbol of the third nominal PUSCH (nominal#3) may be excluded.
- the first nominal PUSCH (nominal#1) can be divided into two actually transmitted actual PUSCHs (actual#1 and actual#2) by the slot boundary.
- the second nominal PUSCH (nominal#2) and the third nominal PUSCH (nominal#3) PUSCH may be divided into one actual PUSCH (actual#3 and actual#4) by grouping consecutive symbols excluding invalid symbols.
- the fourth nominal PUSCH (nominal#4) is divided into two actually transmitted PUSCHs (actual#5 and actual#6) by the slot boundary.
- the UE finally transmits PUSCHs that are actually transmitted.
- One actual PUSCH must include at least one DMRS symbol. Accordingly, when the PUSCH repeated transmission type B is configured, if the total length of the actual PUSCH is one symbol, the actual PUSCH may be omitted without being transmitted. This is because the actual PUSCH, which is one symbol, cannot include information other than DMRS.
- frequency hopping may be configured for uplink channel transmission.
- intra-slot frequency hopping in which frequency hopping is performed in a slot or inter-slot frequency hopping in which frequency hopping is performed in each slot is provided to the UE can be set.
- the UE divides the PUSCH in half in the time domain in the slot for transmitting the PUSCH, transmits half in the scheduled PRB, and transmits the other half in the PRB in which the offset value is added to the scheduled PRB.
- the offset value may be set to two or four values according to the size of the active BWP through the upper layer, and one value may be set (indicated) to the UE through DCI.
- the UE When inter-slot frequency hopping is configured for the UE, the UE transmits a PUSCH in a PRB scheduled in a slot having an even slot index, and transmits a PUSCH in a PRB in which an offset value is added to a PRB scheduled in an odd-numbered slot.
- one of inter-repetition frequency hopping in which frequency hopping is performed at a nominal PUSCH boundary and inter-slot frequency hopping in which frequency hopping is performed in every slot may be configured for the UE.
- the UE transmits actual PUSCH(s) corresponding to the odd-numbered nominal PUSCH on the scheduled PRB, and the UE transmits the actual PUSCH(s) corresponding to the even-numbered nominal PUSCH It can be transmitted on the PRB in which the offset value is added to the PRB.
- the offset value may be set to two or four values according to the size of the active BWP through the upper layer, and one value may be set (indicated) to the UE through DCI.
- the UE transmits a PUSCH in a PRB scheduled in a slot having an even slot index, and transmits a PUSCH in a PRB in which an offset value is added to a PRB scheduled in an odd-numbered slot.
- the UE When the UE performs repeated PUSCH transmission, if a symbol scheduled for PUSCH transmission in a specific slot overlaps with a semi-statically configured DL symbol or a symbol configured for reception of an SS/PBCH block, overlap on a slot including the overlapping symbol
- the PUSCH may not be transmitted.
- the overlapping PUSCH may not be transmitted on the next slot as it is postponed.
- the UE When the UE receives DCI of DCI formats 1_0, 1_1, and 1_2 for scheduling the PUCCH, the UE must transmit the PUCCH to the base station.
- the PUCCH may include uplink control information (UCI), and the UCI may include at least one of HARQ-ACK, Scheduling Request (SR), and Channel State Information (CSI).
- the HARQ-ACK may be a HARQ-ACK for whether the UE has successfully received two types of channels.
- the first type may be HARQ-ACK for the PDSCH when the UE receives the PDSCH scheduled through DCI of DCI formats 1_0, 1_1, and 1_2.
- the second type is a DCI in which DCI formats 1_0, 1_1, and 1_2 are DCI indicating release of a PDSCH that is semi-statically scheduled (Semi-Persistent Scheduling, SPS), it may be HARQ-ACK for DCI.
- the 'PDSCH-to-HARQ_feedback timing indicator' field of DCI may indicate K1, which is information (value) about a slot in which the scheduled PUCCH is transmitted.
- K1 may be a non-negative integer value.
- DCI of DCI format 1_0 may indicate one of ⁇ 0, 1, 2, 3, 4, 5, 6, 7 ⁇ as the K1 value.
- the K1 value that can be indicated may be set (configured) from a higher layer.
- a method in which a slot in which a PUCCH including the first type of HARQ-ACK is transmitted is determined.
- the UE may transmit PUCCH including HARQ-ACK on slot m+K1.
- the index of the uplink slot may be a value determined based on the subcarrier interval of the BWP through which the PUCCH is transmitted.
- the last symbol in which the PDSCH is transmitted may mean the last symbol scheduled in the last slot among the slots in which the PDSCH is transmitted.
- 15 shows a scheduling method of a physical uplink control channel according to an embodiment of the present invention.
- the subcarrier interval of the DL BWP through which the PDCCH is received, the subcarrier interval of the DL BWP at which the PDSCH is scheduled, and the subcarrier interval of the UL BWP through which the PUCCH is transmitted may be the same.
- the UE may receive the PDCCH scheduling the PDSCH and the PUCCH from the base station in slot n.
- DCI included in the PDCCH received in slot n may set (indicate) a value of K0 to 2 and a value of K1 to be 3.
- the UE may transmit HARQ-ACK for the PDSCH on slot n+2+K1 (ie, n+5).
- the HARQ-ACK for the PDSCH may be included in the PUCCH.
- FIG 16 shows repeated transmission of a physical uplink control channel according to an embodiment of the present invention.
- the UE may repeatedly transmit the long PUCCH on 2, 4, or 8 slots.
- the long PUCCH format may be PUCCH formats 1, 3, and 4.
- the same UCI may be repeatedly transmitted in every slot.
- the UE may transmit the PUCCH on slot n+K1 (ie, n+2).
- N repeat PUCCH 4
- the UE may repeatedly transmit the PUCCH from slot n+2 to slot n+5.
- the symbol configuration of repeatedly transmitted PUCCHs may be the same. That is, repeatedly transmitted PUCCHs may start from the same symbol in each slot and consist of the same number of symbols.
- frequency hopping may be applied to obtain a diversity gain in the frequency domain.
- the UE divides the time domain of the slot for transmitting the PUCCH in half, so that half of the PUCCH may transmit the first PRB, and the other half of the PUCCH may transmit the second PRB.
- the first PRB and the second PRB may be configured through a higher layer that configures the PUCCH resource.
- the UE may transmit the PUCCH on a first PRB of a slot having an even-numbered slot index and may transmit a PUCCH on a second PRB of a slot having an odd-numbered slot index.
- the UE when the UE performs repeated PUCCH transmission, when a symbol of a specific slot scheduled for PUCCH transmission overlaps with a semi-statically configured DL symbol or a symbol configured for reception of an SS/PBCH block, a slot containing an overlapping symbol PUCCH may not be transmitted on The UE may delay transmitting the untransmitted PUCCH on the next slot. In this case, if the symbol for PUCCH transmission in the delayed slot does not overlap with the semi-statically configured DL symbol or the symbol configured for reception of the SS/PBCH block, the UE may transmit the PUCCH.
- the present invention proposes a method for solving a coverage problem related to PUSCH transmission performed by a UE when a random access procedure between a UE and a base station is performed.
- the UE may transmit the Msg3 PUSCH through an uplink grant included in the random access response (RAR, Msg2).
- the UL grant is information for scheduling the Msg3 PUSCH, a frequency hopping flag indicating frequency hopping information, a time domain resource assignment (TDRA) information, and a frequency domain resource.
- assignment FDRA information for scheduling the Msg3 PUSCH
- MCS modulation and coding scheme
- TPC transmit power control
- the Msg3 PUSCH transmitted through the uplink grant included in Msg2 may be an initial transmission PUSCH.
- the base station may instruct the terminal to retransmit the Msg3 PUSCH.
- Retransmission of the Msg3 PUSCH may be indicated (scheduled) by the PDCCH, and in this case, the retransmission may be indicated through DCI of DCI format 0_0 scrambled with a Temporary C-RNTI (TC-RNTI) included in the PDCCH.
- TC-RNTI Temporary C-RNTI
- the UE may acquire the TC-RNTI through the previously received random access response (Msg2). If the UE successfully detects the DCI indicating retransmission, the UE may retransmit the Msg3 PUSCH based on information included in the DCI.
- the information included in DCI is frequency hopping flag, TDRA information, FDRA information, MCS information, TPC information, ChannelAccess-CPext information, New data indicator (NDI) information, Redundancy version (RV) information, HARQ process number (HPN) It may be information, padding bits information, UL/SUL indicator information, and the like.
- the Msg3 PUSCH indicated through DCI of DCI format 0_0 may be a retransmission PUSCH.
- the Msg3 PUSCH described in the present invention may be an initial transmission PUSCH or a retransmission PUSCH.
- the PUSCH indicated through the uplink grant of the random access response (Msg2) is for initial transmission
- the PUSCH indicated through DCI of DCI format 0_0 scrambled with TC-RNTI may be for retransmission.
- the initial transmission PUSCH and the retransmission PUSCH can be transmitted only in one slot.
- one slot could be indicated in the TDRA field of the uplink grant or the TDRA field of DCI of DCI format 0_0.
- repeated transmission of the Msg3 PUSCH was impossible.
- the UE if the UE does not receive the PDCCH scheduling Msg4 from the base station within a set time after transmitting the Msg3 PUSCH, the UE determines that the random access procedure has failed and has to restart the random access procedure from the beginning. For example, if the channel environment is not good, even if the terminal transmits the Msg3 PUSCH, the base station may fail to receive it.
- the base station cannot transmit the PDCCH scheduling Msg4 to the terminal, and the random access procedure must be restarted. That is, the coverage of the Msg3 PUSCH may be low. Accordingly, there may be a problem in that the entire random access process is delayed. Therefore, in the present invention, a method for solving the Msg3 PUSCH coverage problem through repeated transmission of the Msg3 PUSCH will be described.
- SIB1 system information block 1
- the base station may configure whether repeated transmission of the Msg3 PUSCH is possible through the PBCH. Specifically, whether repeated transmission of the Msg3 PUSCH is set through some bits of the PBCH or whether or not the Msg3 PUSCH can be repeatedly transmitted can be inferred through a DMRS sequence or CRC of the PBCH.
- Whether the Msg3 PUSCH can be repeatedly transmitted may be explicitly indicated or inferred from other information included in SIB1. For example, when SIB1 includes parameters for repeated transmission of Msg3 PUSCH, the UE may determine that repeated transmission of Msg3 PUSCH is possible without a separate configuration (instruction) as to whether or not Msg3 PUSCH can be repeatedly transmitted. Conversely, if SIB1 does not include parameters for repeated transmission of Msg3 PUSCH, the UE may determine that repeated transmission of Msg3 PUSCH is not possible without a separate configuration (instruction) as to whether or not Msg3 PUSCH can be repeatedly transmitted.
- the parameters for repeated transmission of the Msg3 PUSCH may indicate a PRACH resource in which the repeated transmission of the Msg3 PUSCH is performed and the number of times in which the repeated transmission of the Msg3 PUSCH is performed.
- the UE may repeatedly transmit the Msg3 PUSCH through the configured PRACH resource.
- the terminal may transmit the Msg PUSCH as many times as the set number of repeated transmissions.
- the base station may set a single value or a plurality of values as the number of times the Msg3 PUSCH can be repeatedly transmitted to the terminal.
- the base station may set one value among 1, 2, 4, and 8 to the terminal or a set including a plurality of values (eg, ⁇ 1, 2, 4, 8 ⁇ ). That is, the base station may set one value to the terminal as the number of repeated transmissions of the Msg3 PUSCH or set a plurality of possible values as the number of repeated transmissions.
- the base station may indicate to the terminal one of the plurality of values through additional signaling (setting).
- the Msg3 PUSCH transmitted by the UE may be repeatedly transmitted in units of slots. For example, when the number of repeated transmissions of the Msg3 PUSCH is 4, the Msg3 PUSCH may be repeatedly transmitted on 4 slots. That is, it means that the Msg3 PUSCH transmitted in one slot can be repeated 4 times.
- the terminal When the base station sets the terminal to enable repeated transmission of the Msg3 PUSCH in the cell, the terminal always repeatedly transmits the Msg3 PUSCH even if there is no additional signaling (configuration) indicating repeated transmission of the actual Msg3 PUSCH from the base station.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH through explicit information received from the base station.
- Explicit information for the UE to determine repeated transmission of the Msg3 PUSCH may be as follows.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by interpreting information configured from the higher layer. For example, the base station can set whether repeated transmission of the Msg3 PUSCH is possible in the cell through SIB1 in the cell initial access process to the terminal, and in addition, if it is set that repeated transmission of the Msg3 PUSCH is possible, always Msg3 to the terminal It can be configured to repeatedly transmit PUSCH.
- the UE may determine whether to repeatedly transmit Msg3 PUSCH by analyzing information in a downlink channel scheduling Msg3 PUSCH.
- the downlink channel may include an uplink grant of a random access response or a DCI format 1_0 scheduling a random access response or a DCI format 0_0 scheduling an Msg3 PUSCH.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by analyzing field information in an uplink grant of a random access response for scheduling the initial transmission of the Msg3 PUSCH.
- the UE may determine repeated transmission of the Msg3 PUSCH by analyzing field information in DCI of DCI format 0_0 scrambled with TC-RNTI for scheduling retransmission of Msg3 PUSCH.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by analyzing field information in DCI that is DCI format 1_0 for scheduling a random access response.
- the terminal may determine whether to repeatedly transmit the Msg3 PUSCH through implicit information transmitted by the base station. Implicit information for the UE to determine whether to repeatedly transmit the Msg3 PUSCH may be as follows.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting information in a downlink channel for scheduling the Msg3 PUSCH. For example, ii-a) The UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting field information in an uplink grant for scheduling the initial transmission of the Msg3 PUSCH. ii-b) The UE may determine whether to repeatedly transmit Msg3 PUSCH by reinterpreting field information in DCI of DCI format 0_0 scrambled with TC-RNTI for scheduling retransmission of Msg3 PUSCH.
- the fields in ii-a) and ii-b) may be any one of TDRA, FDRA, MCS, and TPC fields.
- a method of interpreting the field may be as follows.
- the UE may determine whether to reinterpret the field based on the number of symbols scheduled by the TDRA field. For example, when the number of symbols scheduled in the TDRA field is greater than or equal to a specific number, the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting field information in the uplink grant of the random access response. Since the base station allocates a large number of symbols to the terminals having insufficient coverage, when the number of allocated symbols is equal to or greater than a predetermined specific number, the terminal may repeatedly transmit the Msg3 PUSCH to solve the coverage problem. That is, when the number of allocated symbols is less than the predetermined specific number, the UE may not perform repeated transmission of the Msg PUSCH.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting field information in the uplink grant of the random access response. This is because, when the base station allocates a small number of symbols to the terminal, a lack of coverage may occur. That is, when the base station allocates more symbols than a specific number, the terminal may not perform repeated transmission of the Msg3 PUSCH.
- the specific number may be set from a higher layer.
- the upper layer may mean SIB1 or other SIBs.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting the FDRA field based on the number of PRBs scheduled by the FDRA field. For example, when the number of PRBs indicated by the FDRA field is greater than or equal to a specific number, the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting field information in the uplink grant of the random access response. Since the base station allocates a large number of PRBs to terminals having insufficient coverage, when the number of allocated PRBs is equal to or greater than a predetermined specific number, the terminal may repeatedly transmit the Msg3 PUSCH to solve the coverage problem.
- the UE may not perform repeated transmission of the Msg PUSCH.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting field information in the uplink grant of the random access response. This is because, when the base station allocates a small number of PRBs to the terminal, a coverage problem may occur. That is, when the base station allocates more PRBs to the terminal than a specific number, the terminal may not perform repeated transmission of the Msg3 PUSCH.
- the specific number may be set from a higher layer.
- the upper layer may mean SIB1 or other SIBs.
- the UE reinterprets the field to determine whether to transmit the Msg3 PUSCH. For example, if the modulation scheme indicated by the MCS field is low (eg, QPSK) or the coding rate is low, the UE reinterprets field information in the uplink grant of the random access response to determine whether to repeatedly transmit the Msg3 PUSCH. there is. Since the base station sets a low modulation scheme or a low coding rate to the terminal having insufficient coverage, when the modulation method or the coding rate is low, the terminal may perform repeated transmission of the Msg3 PUSCH.
- the modulation scheme indicated by the MCS field is low (eg, QPSK) or the coding rate is low
- the UE reinterprets field information in the uplink grant of the random access response to determine whether to repeatedly transmit the Msg3 PUSCH. there is. Since the base station sets a low modulation scheme or a low coding rate to the terminal having insufficient coverage, when the modulation method or
- Tables 4 and 5 show modulation schemes and coding rates that can be set in the terminal.
- Table 4 may be applied when transform precoding for PUSCH transmission of the UE is set to disable, and Table 5 may be applied if it is set to enable.
- the base station receives the first 16 MCS indices (0 to 15 in Tables 4 and 5) ) can be set.
- the base station may set QPSK, 16QAM, and 64QAM to the terminal as a modulation method.
- the base station provides pi/2-BPSK, QPSK, 16QAM, and 64QAM to the terminal as a modulation method.
- a lower modulation scheme among the modulation schemes may be pi/2-BPSK or QPSK. That is, when the UE is configured with pi/2-BPSK or QPSK, the UE may perform repeated transmission of the Msg3 PUSCH.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting the field. For example, when the TPC command indicated by the TPC field indicates a specific value or more, the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting field information in the uplink grant of the random access response.
- the base station can instruct a TPC command of a high value (above a specific value) to transmit with high power to a UE lacking coverage
- the UE performs repeated transmission of the Msg3 PUSCH can be done That is, when the base station sets the TPC command to the terminal to be smaller than a specific value, the terminal may not perform repeated transmission of the Msg3 PUSCH.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting a specific field.
- the UE may determine the TB size of the Msg3 PUSCH based on the FDRA field, the TDRA field, the MCS field, and the like, and may determine whether to repeatedly transmit the Msg3 PUSCH according to the TB size. For example, if the TB size is less than or equal to a certain value, the UE may determine whether to repeatedly transmit the Msg3 PUSCH by reinterpreting field information in the uplink grant of the random access response.
- the terminal can perform repeated transmission of the Msg3 PUSCH when a TB of a certain value or less is allocated. That is, when a TB larger than a predetermined value is allocated, the UE may not perform repeated transmission of the Msg3 PUSCH.
- the UE may determine the number of repeated transmissions of the Msg PUSCH according to the number of repeated transmissions set by the base station. In addition, the UE may perform repeated transmission of the Msg3 PUSCH according to the set number of repeated transmissions. Before indicating the number of repeated transmissions, the base station may set a plurality of candidates for the number of repeated transmissions to the terminal. Candidates for the number of repeated transmissions may be predetermined values, set as broadcasting information, or set in a higher layer. For example, a candidate for the number of repeated transmissions may be configured as ⁇ N1, N2, N3, N4 ... ⁇ .
- the candidates for the number of repeated transmissions may be natural numbers equal to or greater than 1, and may be powers of 2 values.
- a plurality of candidates for the number of repeated transmissions may be ⁇ 1, 2, 4, 8 ⁇ .
- the UE may repeatedly transmit the Msg3 PUSCH as much as any one of 1, 2, 4, and 8 indicated by the base station.
- the UE may receive a set number of repeated transmissions of the Msg3 PUSCH from a higher layer. For example, when the UE sets an integer value of n as the number of repeated transmissions of the Msg3 PUSCH from a higher layer, the UE may repeatedly transmit the Msg3 PUSCH n times.
- the base station uses a DCI field of DCI format 0_0 for scheduling Msg3 PUSCH to the UE or DCI format 1_0 for scheduling random access response (Msg2) to set the number of repeated Msg3 PUSCH transmissions.
- Msg2 scheduling random access response
- the UE interprets a certain number of bits in DCI of DCI format 1_0 scrambled with RA-RNTI for scheduling random access response as bits indicating the number of repeated transmissions of Msg3 PUSCH, and repeats transmission of Msg3 PUSCH. there is.
- the UE interprets a certain number of bits in DCI of DCI format 0_0 scrambled with TC-RNTI for scheduling retransmission of Msg3 PUSCH as bits indicating the number of repeated transmissions of Msg3 PUSCH, and performs repeated transmission of Msg3 PUSCH.
- the number of repeated transmissions that can be indicated by i) a higher layer or ii) DCI having DCI formats 0_0 and 1_0 may be one of a plurality of repeated transmission number candidates. Thereafter, the UE may repeatedly transmit the Msg3 PUSCH as much as one indicated value.
- a field including a certain number of bits in DCI of DCI format 0_0 scrambled with TC-RNTI of ii) above may be a New data indicator (NDI), HARQ process number (HPN), CSI request, FDRA, or TPC field. Since the NDI, HPN, and CSI request fields may not be used for Msg3 PUSCH transmission, the UE may interpret the values of the NDI, HPN, and CSI request fields as field values for repeated Msg3 PUSCH transmission.
- NDI New data indicator
- HPN HARQ process number
- CSI request fields may not be used for Msg3 PUSCH transmission, the UE may interpret the values of the NDI, HPN, and CSI request fields as field values for repeated Msg3 PUSCH transmission.
- the base station may schedule with a small number of PRBs in the frequency domain or schedule PUSCH with the highest possible transmission power. Therefore, the UE interprets a certain number of bit values of the FDRA field as field values for repeated transmission of Msg3 PUSCH, or interprets some of the indexes indicating low dB values of the TPC field as field values for repeated transmission of Msg3 PUSCH. there is.
- a method for the UE to interpret a predetermined number of bits in DCI of DCI format 0_0 scrambled with TC-RNTI for repeated transmission of Msg3 PUSCH will be described.
- a candidate for the number of repeated transmissions of the Msg PUSCH configured for the UE may be ⁇ N1, N2, N3, N4 ⁇ .
- the UE may interpret the bit value of one of the DCI fields of DCI format 0_0 scrambled with TC-RNTI as the number of repeated transmissions of the Msg3 PUSCH. That is, the UE may interpret the X bit of any one of the NDI, HPN, CSI request, FDRA, and TPC fields as a field value for repeated transmission of the Msg3 PUSCH. For example, the UE may interpret the X (eg, 2) bit of the HPN field as a field value for repeated transmission of the Msg3 PUSCH.
- the UE may interpret a combination of bit values of two different fields among fields of DCI format 0_0 scrambled with TC-RNTI as the number of repeated transmissions of the Msg3 PUSCH. That is, the UE is not a field including X bits and X bits of any one of NDI, HPN, CSI request, FDRA, and TPC fields, but Y of any one of NDI, HPN, CSI request, FDRA, and TPC fields.
- the bit may be interpreted as a field value for repeated transmission of the Msg3 PUSCH.
- the UE may interpret a combination of X (eg, 1) bits of the NDI field and Y (eg, 1) bits of the HPN field, that is, 2 bits as a field value for repeated transmission of the Msg3 PUSCH.
- the UE may interpret a combination of X (eg, 1) bits of the NDI field and Y (eg, 1) bits of the CSI request field, that is, 2 bits as a field value for repeated transmission of the Msg3 PUSCH.
- CSI request ⁇ may be set.
- the UE may interpret bit values of two different fields among fields of DCI format 0_0 scrambled with TC-RNTI as field values for repeated transmission of Msg3 PUSCH. Specifically, the UE may interpret the X bit of any one field of the DCI and the Y bit of a field other than the field including the X bit as a field value for repeated transmission of the Msg3 PUSCH. For example, the X bit may indicate whether the UE interprets the Y bit as a field value for repeated transmission of the Msg3 PUSCH, and the Y bit may indicate the number of repeated transmissions of the Msg3 PUSCH.
- 1 bit of the NDI field may indicate whether the UE interprets the Y bit of the FDRA field as a field value for repeated transmission of the Msg3 PUSCH, in which case the value of 1 bit of the NDI field is '0' , the Y bit of the FDRA field is not interpreted as a field value for repeated transmission of the Msg3 PUSCH, and if the value of 1 bit of the NDI field is '1', the Y bit of the FDRA field is interpreted as a field value for repeated transmission of the Msg3 PUSCH.
- the Y bit may indicate to the UE any one of the preset Msg3 PUSCH repeat transmission number candidates.
- the UE may be instructed on the number of repeated transmissions of the Msg3 PUSCH through a specific field of the uplink grant of the random access response for scheduling the initial transmission of the Msg3 PUSCH.
- the UE may repeatedly transmit the Msg3 PUSCH according to the indicated number of repeated transmissions.
- the UE may interpret the bit value of a specific field of the uplink grant as a field value for repeated transmission of the Msg3 PUSCH.
- the specific bit of the uplink grant may indicate any one of the number of repeated transmissions of a plurality of Msg3 PUSCHs.
- a specific field of the uplink grant may be a CSI request, FDRA, TPC or MCS field.
- the UE may interpret the value of the CSI request field as a field value for repeated transmission of the Msg3 PUSCH. For example, since the base station can schedule the terminal with insufficient coverage with a small number of PRBs in the frequency domain, the terminal can interpret the bit value of the FDRA field as a field value for repeated transmission of the Msg3 PUSCH. In another example, since the base station can schedule transmission of the PUSCH with the highest possible transmission power to the terminal with insufficient coverage, the terminal interprets some of the indexes indicating the low dB value of the TPC field as field values for repeated transmission of the Msg3 PUSCH. can do.
- the TPC field may have a 3-bit size, and the TPC value indicated by each code point is shown in Table 6.
- a UE lacking coverage may be scheduled to transmit a PUSCH with the lowest possible modulation scheme (eg, QPSK) and/or a low coding rate. Accordingly, the UE may interpret some of the lower indices among the first 16 MCS indices (0 to 15) of Tables 4 and 5 included in the MCS field as fields for repeated transmission of the Msg3 PUSCH.
- a candidate for the number of repeated transmissions of the Msg PUSCH configured for the UE may be ⁇ N1, N2, N3, N4 ⁇ .
- a bit value of any one of the fields of the uplink grant may be set to indicate the number of repeated transmissions of the Msg3 PUSCH. That is, the UE may interpret the value of the X bit of a specific field among the CSI request, FDRA, TPC, and MCS fields as the Msg3 PUSCH repeated transmission field value.
- the base station may set the X (eg, 2) bits of the FDRA field as a field for repeated transmission of the Msg3 PUSCH, and the base station uses the X (eg, 2) bits to set four (N1, N2, N3) bits. , N4) may indicate any one of the number of repeated transmissions.
- the UE may determine that the bit value of the FDRA field is '00', N1 if '01', N2, N3 if the FDRA field is '10', and 'N4' if the FDRA field is '11'.
- ceil(x) in the present specification is a function that returns the smallest integer among integers greater than or equal to x.
- the X bit may be from the most significant bit (MSB) to the X bit except for the bit(s) indicating frequency hopping among the FDRA field. Specifically, if the number of RBs included in the initial uplink BWP (initial UL BWP) is less than 50, the X bits may be X bits from the second bit of the FDRA field, and if the number of RBs is greater than or equal to 50, the FDRA field It may be an X bit from the third bit.
- the base station sets the X (eg, 2) bit of the TPC field as a bit of the field for repeated transmission of Msg3 PUSCH, and the base station uses 2 bits of the TPC field to indicate one of four repeated transmission times.
- the UE may determine the bit value of the TPC field as '00' as N1, '01' as N2, '10' as N3, and '11' as 'N4'.
- the X bit may be the leading (MSB) X bit or the trailingmost (LSB) X bit among the 3-bit TPC fields.
- the base station sets the X (eg, 2) bit of the MCS field as a bit of the field for repeated transmission of the Msg3 PUSCH, and the base station uses 2 bits of the MCS field to indicate one of four repeated transmission times.
- the UE may determine the bit value of the MCS field as '00' as N1, '01' as N2, '10' as N3, and '11' as 'N4'.
- the X bit may be the leading (MSB) X bit or the last (LSB) X bit among the 4-bit MCS fields.
- the Z bit is required to indicate the number of repeated transmissions to the UE.
- the X eg, 1) bit of the first field (eg, CSI request field) and Y (eg, 1) bit of the second field (eg, FDRA field, MCS field) indicate repeated transmission of the Msg3 PUSCH.
- Y eg, 1) bit of the second field (eg, FDRA field, MCS field) indicate repeated transmission of the Msg3 PUSCH.
- the base station may indicate any one of the four repeated transmission times using 2 bits.
- ⁇ value of one bit of first field, value of one bit of second field ⁇ is ⁇ 0, 0 ⁇ , the number of repeated transmissions is set to N1, ⁇ 0, 1 ⁇ is set to N2, and ⁇ 1, 0 ⁇ If , it may be set to N3, and if ⁇ 1, 1 ⁇ , it may be set to N4.
- a field for repeated transmission of Msg3 PUSCH in DCI of DCI format 0_0 scrambled with uplink grant of random access response and TC-RNTI is at least one field among TDRA, FDRA, MCS, and TPC fields.
- the UE may perform repeated transmission of the Msg3 PUSCH by reinterpreting bit values of one or a plurality of fields.
- a candidate for the number of repeated transmissions of the Msg PUSCH configured for the UE may be ⁇ N1, N2, N3, N4 ⁇ .
- the UE may perform repeated transmission of the Msg3 PUSCH based on the number of symbols scheduled (allocated) by the TDRA field. For example, if the number of symbols allocated for transmission of the Msg3 PUSCH is 1 to (M1-1) symbols, the number of repeated transmissions is N1, and if M1 to (M2-1) symbols, the number of repeated transmissions is N2, and M2 to ( If it is M3-1) symbol, the number of repeated transmission may be determined as N3, and if it is M3 to (M4-1) symbol, the number of repeated transmission may be determined as N4. In this case, M1 ⁇ M2 ⁇ M3 ⁇ M4 and N1>N2>N3>N4 may be satisfied.
- the base station when the base station allocates a small number of symbols to the terminal, the lack of coverage may intensify. That is, when a small number of symbols is allocated, the UE may repeatedly transmit more Msg3 PUSCH. As another example, it may be N1 ⁇ N2 ⁇ N3 ⁇ N4. This is because the base station can allocate a large number of symbols to the terminal having insufficient coverage. That is, when the base station allocates a large number of symbols, the terminal may repeatedly transmit more Msg3 PUSCH. In this case, the number of allocated symbols may be set from a higher layer, and specifically may be set through SIB1 or other SIBs.
- the UE may perform repeated transmission of the Msg3 PUSCH based on the number of PRBs scheduled by the FDRA field. For example, the UE sets the number of repeated transmissions to N1 when the number of PRBs allocated for PUSCH transmission is 1 to (M1-1) PRBs, and sets the number of repeated transmissions to N2 when the number of PRBs is M1 to (M2-1) PRBs, and M2 to ( M3-1)
- the number of repeated transmissions may be determined as N3, and in the case of M3 to (M4-1), the number of repeated transmissions may be determined as N4.
- M1 ⁇ M2 ⁇ M3 ⁇ M4 and may be N1>N2>N3>N4.
- the base station when the base station allocates a small number of PRBs to the terminal, the lack of coverage may intensify. That is, when a small number of PRBs is allocated, the UE may repeatedly transmit more Msg3 PUSCHs. As another example, it may be N1 ⁇ N2 ⁇ N3 ⁇ N4. This is because the base station can allocate a large number of PRBs to terminals with insufficient coverage. That is, when the base station allocates a large number of PRBs, the terminal may repeatedly transmit more Msg3 PUSCHs. In this case, the number of allocated PRBs may be set from a higher layer, and specifically may be set through SIB1 or other SIBs.
- the UE may perform repeated transmission of the Msg3 PUSCH based on the modulation scheme or the coding rate indicated by the MCS field. For example, if the index on the MCS table indicated by the MCS field is 0 to (M1-1), the terminal sets the number of repeated transmissions to N1, and in the case of M1 to (M2-1), the number of repeated transmissions is N2, In the case of M2 to (M3-1), the number of repeated transmissions may be determined as N3, and in the case of M3 to (M4-1), the number of repeated transmissions may be determined as N4. M1 ⁇ M2 ⁇ M3 ⁇ M4, and may be N1>N2>N3>N4. This is because the base station can set a low modulation scheme or coding rate to the terminal having insufficient coverage. That is, the lower the modulation scheme or the coding rate is set, the more the UE can repeatedly transmit the Msg3 PUSCH.
- the UE may perform repeated transmission of the Msg3 PUSCH based on the TPC command indicated by the TPC field. For example, when the TPC command index indicated by the TPC field is 0 to (M1-1), the terminal sets the number of repeated transmissions to N1, and when M1 to (M2-1), the terminal sets the number of repeated transmissions to N2, and M2 to ( In the case of M3-1), the number of repeated transmissions may be determined as N3, and in the case of M3 to (M4-1), the number of repeated transmissions may be determined as N4. M1 ⁇ M2 ⁇ M3 ⁇ M4, and may be N1>N2>N3>N4. This is because the base station can set a high value TPC command to transmit with high power to the terminal having insufficient coverage. That is, the higher the TPC command value is set, the more the UE can repeatedly transmit the Msg3 PUSCH.
- the UE may perform repeated transmission of the Msg3 PUSCH based on the TB size. For example, the UE may determine the TB size through which the Msg3 PUSCH is transmitted based on the FDRA, TDRA, and/or MCS field.
- the terminal sets the number of repeated transmissions to N1 when the determined TB size is 0 to (M1-1), the number of repeated transmissions to N2 when M1 to (M2-1), and the number of repeated transmissions when M2 to (M3-1) may be determined as N3, and the number of repeated transmissions may be determined as N4 in the case of M3 to (M4-1).
- M1 ⁇ M2 ⁇ M3 ⁇ M4 and may be N1>N2>N3>N4. This is because the base station can set a small TB size to the terminal with insufficient coverage. That is, the smaller the TB size is, the more the UE can repeatedly transmit the Msg3 PUSCH.
- the UE may receive a TDRA table including the number of repeated transmissions of the Msg3 PUSCH from the base station.
- Each entry in the TDRA table may include resource information on the time domain of the Msg3 PUSCH and information on the number of repeated transmissions.
- each entry may include the same number of repeated transmissions or may include a different number of repeated transmissions.
- the UE may determine the number of repeated transmissions of the Msg3 PUSCH with reference to the TDRA table. For example, if the UE is configured to repeatedly transmit the Msg3 PUSCH, it may perform repeated transmission of the Msg3 PUSCH with reference to the TDRA table.
- the UE when it is configured not to repeatedly perform the Msg3 PUSCH, it may transmit the Msg3 PUSCH with reference to the conventional TDRA table.
- the conventional TDRA table may mean a table in which the number of repeated transmissions of the Msg3 PUSCH is not included.
- the one or more repeated transmission times described in this specification may be a value commonly used for initial transmission and retransmission of the Msg3 PUSCH or independently used.
- the UE may determine the number of repeated transmissions for the retransmission of the Msg3 PUSCH based on the number of repeated transmissions instructed for the initial transmission of the Msg3 PUSCH.
- the UE may determine the number of repeated transmissions for the retransmission of the Msg3 PUSCH through bits of a specific field of the DCI transmitted by the base station, or may determine the number of repeated transmissions for the retransmission of the Msg3 PUSCH through the TDRA table.
- DCI may be DCI of DCI format 0_0 in which CRC is scrambled with TC-RNTI.
- the bit value may indicate that the number of repeated transmissions for retransmission of the Msg3 PUSCH is the same as the number of repeated transmissions for the initial transmission of the Msg3 PUSCH. For example, when the value of some bits of the bit is 0 or the value of all bits is 0, the UE determines that the number of repeated transmissions for the retransmission of the Msg3 PUSCH is the same as the number of repeated transmissions for the initial transmission of the Msg3 PUSCH. there is.
- the number of repeated transmissions for the retransmission of the Msg3 PUSCH may be determined based on the number of repeated transmissions for the initial transmission of the Msg3 PUSCH.
- One of the bit values of DCI may indicate that the number of repeated transmissions for the initial transmission and the retransmission of the Msg3 PUSCH are the same.
- One of the bit values of DCI may indicate that the number of repeated transmissions for the retransmission of the Msg3 PUSCH is greater than the number of repeated transmissions for the initial transmission of the Msg3 PUSCH. Specifically, one of the bit values of DCI may indicate that the number of repeated transmissions for the retransmission of the Msg3 PUSCH is twice as large as the number of repeated transmissions for the initial transmission of the Msg3 PUSCH.
- Msg3 PUSCH retransmission may be performed.
- One of the bit values of DCI may indicate that the number of repeated transmissions for the retransmission of the Msg3 PUSCH is smaller than the number of repeated transmissions for the initial transmission of the Msg3 PUSCH. Specifically, one of the bit values of DCI may indicate that the number of repeated transmissions for the retransmission of the Msg3 PUSCH is 1/2 of the number of repeated transmissions for the initial transmission of the Msg3 PUSCH.
- the UE may perform Msg3 PUSCH retransmission according to the minimum number of repeated transmissions.
- Bits of the above-described specific fields of DCI may be replaced with some entries in the TDRA table.
- the number of repeated transmissions for the retransmission of the Msg3 PUSCH indicated by some entries in the TDRA table is equal to, greater than, or smaller than the number of repeated transmissions for the initial transmission of the Msg3 PUSCH. Yes (eg 1/2 times smaller).
- the UE When the UE is configured by the base station to repeatedly transmit the Msg3 PUSCH K times, the UE may repeatedly transmit the Msg3 PUSCH K times. In this case, since the repeatedly transmitted Msg3 PUSCH is the same, if the base station successfully receives some of the K Msg3 PUSCHs, repeated transmission of the Msg3 PUSCH may not be necessary. Therefore, a method of stopping repeated transmission of the Msg3 PUSCH will be described below.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH based on whether the PDCCH scheduling Msg4 is received.
- the UE may detect a PDCCH scheduling Msg4 transmitted from the base station after transmission of the first Msg3 PUSCH.
- the terminal may recognize that the base station has successfully received the Msg3 PUSCH. Accordingly, when the UE schedules the PDCCH for scheduling Msg4, the UE may stop subsequent transmission of the Msg3 PUSCH without performing repeated transmission.
- the PDCCH scheduling Msg4 may include DCI of DCI format 1_0 scrambled with TC-RNTI.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH based on whether the PDCCH for scheduling the retransmission of the Msg3 PUSCH is received.
- the UE may detect a PDCCH scheduling retransmission of the Msg3 PUSCH transmitted from the base station after the transmission of the first Msg3 PUSCH.
- the UE may receive scheduling information of the new Msg3 PUSCH. Accordingly, the UE may stop the repeated transmission of the Msg3 PUSCH that is being transmitted.
- the PDCCH scheduling the Msg3 PUSCH may include DCI of DCI format 0_0 scrambled with TC-RNTI.
- the UE may determine whether to repeatedly transmit the Msg3 PUSCH based on whether an uplink grant of a random access response (Msg2) for scheduling the initial transmission of the Msg3 PUSCH is received. After transmission of the first Msg3 PUSCH, the UE may receive the PDCCH scheduling the Msg2 uplink grant and the Msg2 uplink grant. If the UE receives an uplink grant of Msg2 or a PDCCH scheduling an uplink grant of Msg2, the UE may receive scheduling information of a new Msg3 PUSCH. Therefore, the UE may stop the repeated transmission of the Msg3 PUSCH that is being transmitted.
- the PDCCH scheduling the uplink grant of Msg2 may include DCI of DCI format 1_0 scrambled with RA-RNTI.
- the UE may repeatedly transmit the Msg3 PUSCH within a specific time window, and when the specific time window ends, the UE may stop the repeated transmission of the Msg3 PUSCH.
- the repeated transmission of the Msg3 PUSCH may not be transmitted in a specific situation (eg, a situation in which the repeated transmission of the Msg3 PUSCH is stopped in the above-described i) to iii), and may be deferred to a slot thereafter. Accordingly, the repeated transmission of the Msg3 PUSCH may be delayed after a predetermined time.
- the UE may perform repeated transmission of the Msg3 PUSCH only for a specific time (slot) from the first transmission of the Msg3 PUSCH. That is, the UE may perform repeated Msg3 PUSCH transmission within a specific time (slot), but may no longer perform repeated Msg3 PUSCH transmission when the specific time (slot) ends.
- the UE may reinterpret the CSI request field, the FDRA field, the TPC and MCS fields to determine the number of repeated transmissions of the Msg3 PUSCH.
- a method for determining whether the UE should reinterpret the CSI request field, the FDRA field, and the TPC field to determine the number of repeated transmissions of the Msg3 PUSCH will be described.
- the UE may reinterpret the CSI request field, the FDRA field, and the TPC field based on the above-described method.
- the UE transmitting the PRACH rather than the separate PRACH resource may always reinterpret the CSI request field, the FDRA field, or the TPC field for the original purpose.
- a separate PRACH resource may be included in SIB1 and configured by the base station to the terminal.
- the UE may repeatedly transmit the Msg3 PUSCH on a resource determined based on at least one of the PRACH preamble and the RACH opportunity. For example, the base station may check on which resource the PRACH transmitted by the terminal is transmitted. If the PRACH transmitted by the UE is transmitted on the separate PRACH resource, the base station indicates the number of repeated transmissions of the Msg3 PUSCH using at least one or two of the CSI request field, the FDRA field, and the TPC field. can do. When the base station indicates the number of repeated transmissions, the base station may indicate the number of repeated transmissions as 1. That is, it can be configured so that the Msg3 PUSCH is not repeatedly transmitted.
- a value of one of a plurality of preset repeat transmission number candidates may be set to '1'.
- N1 may be a preset value (not separately set) of 1, and the base station may set only the values of N2, N3, and N4.
- the base station may indicate whether to repeatedly transmit the Msg3 PUSCH through a specific field (eg, CSI request field).
- a specific field eg, CSI request field
- the base station may indicate that repeated transmission of the Msg3 PUSCH is not performed through a specific field.
- the base station instructs to perform repeated transmission of the Msg3 PUSCH through a specific field (eg, the CSI request field)
- the number of repeated transmissions is indicated using at least one or two fields of the FDRA field and the TPC field.
- the base station does not need to indicate 1 as the number of repeated transmissions of the Msg3 PUSCH.
- the value of the repeat transmission number candidates may not include 1. That is, the candidate for the number of repeated transmissions may be set to a value greater than 1.
- the UE may determine whether to reinterpret the CSI request field, the FDRA field, and the TPC field for the purpose of repeated transmission of the Msg3 PUSCH based on the value of the specific field.
- the specific field may be any one of the uplink grants of the random access response.
- the specific field may be a CSI request field, and in this case, whether to reinterpret it may be determined based on the value of 1 bit of the CSI request field. If the value of the CSI request field is 0, the UE may interpret the FDRA field and the TPC field for the original purpose (not for the purpose of repeatedly transmitting the Msg3 PUSCH).
- the UE may reinterpret the FDRA field and the TPC field. At this time, since the CSI request field is used to determine whether to reinterpret it, the CSI request field may be excluded from the reinterpreted field for repeated transmission of the above-described Msg3 PUSCH.
- the UE must determine the TPC command value of the Msg3 PUSCH.
- the UE may determine the highest 8dB increase in the TPC value in Table 6 as the transmission power command value.
- the base station may set a specific value to the terminal as the TPC value.
- the UE may determine the transmit power command value based on the remaining bit(s) except for the X bit for repeated transmission of the Msg3 PUSCH. Since the number of remaining bit(s) is 3-X, the remaining bit(s) may be 1 bit or 2 bits.
- the UE may insert '11' into 2 bits that are MSB. Accordingly, the UE may determine the TPC value based on '11a' (where a is the remaining 1-bit value) and Table 6. If the remaining 1-bit value (a) is 0, it means '110', and '110' is 6, so referring to Table 6, it may mean an increase of 6dB. If the remaining 1-bit value (a) is 1, it means '111', and '111' is 7, so referring to Table 6, it may mean an 8dB increase. That is, with reference to Table 6, the terminal may be instructed only by the highest two TPC command values (6, 7).
- the TPC value may be determined according to the value of 1 bit. Specifically, the TPC value may be determined according to Table 7.
- TPC_0 and TPC_1 may be predetermined values or values separately set by the base station.
- the TPC_0 and TPC_1 values may be two values among -6, -4, -2, 0, 2, 4, 6, and 8.
- the TPC_0 value may be one of negative (or non-positive) values among -6, -4, -2, 0, 2, 4, 6, and 8, and the TPC_1 value may be one of positive values.
- TPC_0 to TPC_1 values may be determined as two positive (or non-negative) values among -6, -4, -2, 0, 2, 4, 6, and 8.
- the difference between the TPC_0 and TPC_1 values may be 4 dB.
- TPC_0 may be 4 dB
- TPC_1 may be 8 dB
- TPC_0 may be 2 dB
- TPC_1 may be 6 dB
- TPC_0 may be 0 dB
- TPC_1 may be 4 dB
- the difference between the TPC_0 and TPC_1 values may be 8 dB.
- TPC_0 may be 0 dB
- TPC_1 may be 8 dB.
- the UE may insert '1' into 1 MSB bit. Accordingly, the UE may determine the TPC value based on '1ab' (where ab is the remaining 2-bit value) and Table 6. That is, when the remaining 2-bit value ab is 00, it means '100', and '100' is 4, so it may mean an increase of 2dB. Similarly, if the remaining 2-bit value is 01, it means '101', and '101' is 5, so it may mean an increase of 4dB. When the remaining 2-bit value is 10, it means '110', and '110' is 6, so it may mean an increase of 6dB. If the remaining 2-bit value is 11, it means '111', and '111' is 7, so it may mean an 8dB increase. The terminal may be instructed only by the highest four TPC command values (4, 5, 6, 7) in Table 6.
- TPC values may be determined according to the remaining 2 bit values, similar to method ii). Specifically, the TPC value may be determined according to Table 8.
- TPC_0 may be predetermined values or values set separately by the base station.
- the TPC_0, TPC_1, TPC_2 to TPC_3 values may be four values among -6, -4, -2, 0, 2, 4, 6, and 8.
- the TPC_0 value may be one of negative (or non-positive) values among -6, -4, -2, 0, 2, 4, 6, and 8, and the TPC_1, TPC_2, and TPC_3 values may be positive values.
- the TPC_0 and TPC_1 values may be negative (or non-positive) values among -6, -4, -2, 0, 2, 4, 6, and 8, and the TPC_2 and TPC_3 values may be positive values.
- the TPC_0, TPC_1, TPC_2, to TPC_3 values are four positive values (or non-negative values) among -6, -4, -2, 0, 2, 4, 6, and 8.
- TPC_0 may be -6dB
- TPC_1 may be -2dB
- TPC_2 may be 2dB
- TPC_3 may be 6dB
- TPC_0 may be -4dB
- TPC_1 may be 0dB
- TPC_2 may be 4dB
- TPC_3 may be 8dB.
- Information related to repeated transmission of the Msg3 PUSCH could be configured by using some bits of an uplink grant of a random access response or a specific field of DCI.
- the method using some bits may have a problem in that some bits need to be added, resulting in overhead.
- information related to repeated transmission of the Msg3 PUSCH could be set through a method of reinterpreting a specific field of an uplink grant or DCI or reinterpreting a bit of a specific field.
- the reinterpretation method may have a problem of restricting flexible scheduling of the base station.
- the base station may not recognize information on whether the terminal supports repeated transmission of the Msg3 PUSCH. In this case, even if the base station sets information related to repeated transmission of the Msg3 PUSCH, the UE cannot perform repeated transmission of the Msg3 PUSCH, and a problem of erroneously interpreting an uplink grant or DCI may occur. In order to solve this problem, a description will be given of a method in which the UE notifies whether repeated transmission of the Msg3 PUSCH is performed or the number of repeated transmissions when the UE transmits the Msg3 PUSCH to the base station.
- 17 is a diagram illustrating repeated transmission of an Msg3 PUSCH according to an embodiment of the present invention.
- the UE may repeatedly transmit Msg3 PUSCH in 4 slots.
- Msg3 PUSCH transmitted in each slot may transmit the same TB.
- the same TB may be repeatedly transmitted in the same or different redundancy versions (RVs).
- Msg3 PUSCH transmitted in each slot may include at least one DMRS symbol.
- the DMRS symbol may mean a symbol to which DMRS is mapped.
- Msg3 PUSCH transmitted in each slot may include a plurality of DMRS symbols.
- a DMRS symbol transmitted earlier in time may be described as a first DMRS (DMRS) symbol
- a DMRS symbol transmitted later may be described as an additional DMRS (additional DMRS) symbol.
- the first DMRS symbol is described as a DMRS symbol for convenience of description, but it is apparent that an additional DMRS symbol may also be used.
- the base station Since the base station sets information related to transmission of the Msg3 PUSCH to the terminal (eg, through an uplink grant), the resource (slot, symbol, PRB, etc.) through which the first Msg3 PUSCH (Msg3 PUSCH rep#1) is transmitted is recognized in advance and there is. In addition, the base station recognizes in advance the position of the DMRS symbol included in the Msg3 PUSCH rep#1. The base station may receive the Msg3 PUSCH rep#1 transmitted by the terminal based on information related to repeated transmission. Since the same TB is repeatedly transmitted in each slot, the base station can decode the TB transmitted by the Msg3 PUSCH rep#1 even if it receives only the Msg3 PUSCH rep#1.
- the base station may receive the second Msg3 PUSCH (Msg3 PUSCH rep#2) in the next slot in which the Msg3 PUSCH rep#1 is transmitted. Specifically, the base station may determine whether to receive the Msg3 PUSCH rep#2 on the same symbol position and/or PRBs as the Msg3 PUSCH rep#1 on the next slot in which the Msg3 PUSCH rep#1 is transmitted. The base station cannot check whether the terminal repeatedly transmits the Msg3 PUSCH.
- the base station may measure the energy of a time-frequency resource expected to transmit Msg3 PUSCH rep#2, and DMRS of Msg3 PUSCH rep#2 is transmitted It is possible to measure the correlation (correlation) of the DMRS in the expected time-frequency resource. Through this measurement result, the base station may determine (confirm) whether the terminal has transmitted Msg3 PUSCH rep#2.
- the base station may obtain a lower code rate by combining Msg3 PUSCH#1 and Msg3 PUSCH#2, and the TB transmitted by the Msg3 PUSCH It can increase the likelihood of decoding. Since the code rate can be obtained, the possibility of decoding the TB transmitted by the Msg3 PUSCH may increase.
- a process in which the base station determines whether to repeatedly transmit the Msg3 PUSCH may be repeatedly performed in a slot in which the Msg3 PUSCH is likely to be transmitted.
- 18 is a diagram illustrating repeated transmission of Msg3 PUSCH using three DMRSs according to an embodiment of the present invention.
- the UE may transmit the Msg3 PUSCH without repetition. In other words, the UE may transmit the Msg3 PUSCH only in one slot and may not repeatedly transmit the Msg3 PUSCH in subsequent slots.
- the UE may repeatedly transmit the Msg3 PUSCH twice. Even if the uplink channel environment is bad, it can be applied when more repeated transmission of Msg3 PUSCH is not required.
- the UE may transmit the Msg3 PUSCH repeatedly 4 times. This can be applied when the uplink channel environment is worse than the method (b).
- the UE may use DMRS to indicate to the base station how to transmit the Msg3 PUSCH (whether it is repeatedly transmitted).
- DMRS A may be used to indicate the transmission method of the Msg3 PUSCH.
- DMRS B of the Msg3 PUSCH rep#1 and the Msg3 PUSCH rep#2 of each of two slots may be used to indicate the transmission method of the Msg3 PUSCH.
- DMRS C of 4 may be used. That is, when the base station receives DMRS A, it can be recognized that the Msg3 PUSCH is transmitted once, and when it receives DMRS B, it can be recognized that the Msg3 PUSCH is repeatedly transmitted twice, and when DMRS C is received , Msg3 PUSCH can be recognized as being repeatedly transmitted 4 times.
- Different base sequences may be applied to DMRS A, DMRS B, and DMRS C. Since different base sequences are applied to DMRS A, DMRS B, and DMRS C, the base station can determine which base sequence is applied by measuring the correlation between each base sequence.
- sequence initialization may be performed with different sequence initial values. If DMRS A is sequence-initialized with a first value, DMRS B and DMRS C may be sequence-initialized with a second value and a third value, respectively.
- the base station may measure the correlation by assuming sequence initialization as the first value, the second value, and the third value, and may determine which sequence initialization value is used based on the correlation measurement result. For example, the DMRS of the Mag3 PUSCH for which transmit precoding is activated may be as shown in Equation (1).
- N slot symb is the number of symbols per slot
- n ⁇ s,f is a slot index within a frame having a subcarrier spacing configuration ⁇
- l is an OFDM symbol index within a slot
- N ID nSCID is a DMRS sequence initialization value
- n SCID (0 to 1) may mean scrambling identity.
- DMRS A, DMRS B, and DMRS C may be divided into at least different c_init values.
- DMRS A, DMRS B, and DMRS C may be transmitted through different DMRS ports.
- the UE may transmit the Msg3 PUSCH through different DMRS ports.
- the base station may determine which DMRS is used based on the DMRS port of the Msg3 PUSCH transmitted by the terminal.
- the base station can determine whether the Msg3 PUSCH is repeatedly transmitted or how many times it is repeatedly transmitted by determining whether the DMRS on the first slot in which the Msg3 PUSCH is transmitted is DMRS A, DMRS B, or DMRS C. And, according to the DMRS determination result, Msg3 PUSCH may be received.
- the probability that the base station correctly determines the DMRS of the Msg3 PUSCH may be lowered, and thus, through one DMRS among a plurality of DMRSs (DMRS A, DMRS B, DMRS C) It may be less accurate for the base station to determine the transmission method of the Msg3 PUSCH on the first slot. Therefore, the following describes a method for the UE to indicate the transmission method of the Msg3 PUSCH using two DMRSs (DMRS A and DMRS B).
- 19 to 21 show a Msg3 PUSCH transmission method using two DMRSs according to an embodiment of the present invention.
- DMRS A when the Msg3 PUSCH is not repeatedly transmitted, DMRS A may be used to indicate the transmission method of the Msg3 PUSCH.
- DMRS B when the Msg3 PUSCH is repeatedly transmitted 4 times, DMRS B may be used to indicate the transmission method of the Msg3 PUSCH. That is, the UE may inform the base station whether the Msg3 PUSCH is repeatedly transmitted using DMRS A or DMRS B. The base station may determine whether the Msg3 PUSCH is repeatedly transmitted by using the DMRS on the first slot in which the Msg3 PUSCH is transmitted.
- the base station determines that the received DMRS is DMRS A, it may be determined that the Msg3 PUSCH is not repeatedly transmitted. Conversely, if the base station determines that the received DMRS is DMRS B, it may be determined that the Msg3 PUSCH is repeatedly transmitted.
- DMRS A may be the same as or different from the DMRS of the UE without the ability to repeatedly transmit the Msg3 PUSCH. If the DMRSs are the same, even if the base station determines that the DMRS on the first slot is DMRS A, it cannot determine whether the UE transmitting the Msg3 PUSCH is a UE capable of repeatedly transmitting the Msg3 PUSCH. Therefore, when retransmission of the Msg3 PUSCH is indicated, it is not possible to indicate or if repeated transmission for retransmission is indicated, but whether retransmission is repeatedly transmitted must be additionally determined.
- the base station may determine that the terminal that has transmitted the Msg3 PUSCH can repeatedly transmit the Msg3 PUSCH. Accordingly, when the base station instructs retransmission of the Msg3 PUSCH, the base station may indicate repeated transmission of the retransmission.
- the UE transmits DMRS A on the first slot if the Msg3 PUSCH is not transmitted in the slot after the first slot, and transmits DMRS B on the first slot if the Msg3 PUSCH is repeatedly transmitted in the slot after the first slot.
- DMRS A may be used.
- DMRS A may be used since the UE does not repeatedly transmit the Msg3 PUSCH.
- DMRS B since the Msg3 PUSCH is repeatedly transmitted on the first and second slots, DMRS B may be transmitted on the first slot and DMRS A may be transmitted on the second slot.
- DMRS B since the Msg3 PUSCH can be repeatedly transmitted on the first, second, third, and fourth slots, DMRS B is transmitted on the first, second, and third slots, and DMRS A can be transmitted on the fourth slot. That is, the base station can determine whether the DMRS included in the Msg3 PUSCH is DMRS A or DMRS B for every slot, and if the DMRS determined in the first slot is DMRS A, it is determined that there is no Msg3 PUSCH transmitted on the slots after the first slot. can do.
- the base station in the first slot may determine the DMRS for every slot, but it may not be necessary to determine the DMRS of a specific slot.
- the candidate for the number of repeated transmissions of the Msg3 PUSCH configured for the terminal is ⁇ R_1, R_2, ... , R_r ⁇
- DMRS A may be transmitted only on the R_1 th slot, the R_2 th slot, and the R_r th slot.
- the base station can check whether there is additional Msg3 PUSCH transmission by determining only the DMRS of the R_1, R_2, ... R_r-th slots. Specifically, if the candidate for the number of repeated transmissions of the Msg3 PUSCH configured for the UE is ⁇ 1, 2, 4 ⁇ , DMRS A may be transmitted only on the first, second, and fourth slots. Therefore, when the Msg3 PUSCH is repeatedly transmitted 4 times as shown in FIG. 20(c) , the base station only needs to determine the DMRS of the first, second, and fourth slots. That is, there is no need to determine the DMRS of the third slot of FIG. 20(c). However, in the method described with reference to FIG.
- the base station when the base station fails to receive the Msg3 PUSCH for transmitting DMRS A, the base station cannot determine the slot in which the transmission of the Msg3 PUSCH ends. For example, in the Msg3 PUSCH transmitted twice, if the base station fails to receive the Msg3 PUSCH including the DMRS transmitted on the second slot, the base station cannot determine the slot in which the transmission of the Msg3 PUSCH ends.
- the UE may transmit the Msg3 PUSCH of a specific number of consecutive slots including DMRS A.
- the specific number is a value determined according to the number of repeated transmissions of the Msg3 PUSCH, and may be a predetermined value.
- the specific number may be a value corresponding to half the number of repeated transmissions of the Msg3 PUSCH. That is, when the Msg3 PUSCH is repeatedly transmitted twice, the specific number may be 1, and when the Msg3 PUSCH is repeatedly transmitted 4 times, the specific number may be 2. In other words, when the Msg3 PUSCH is repeatedly transmitted R times, the specific number may be f(R/2).
- f(x) may be a function that returns any one of rounding down, rounding off, and rounding up values of x.
- a specific number of consecutive slots may be counted from a slot where repeated transmission of the Msg3 PUSCH ends.
- the Msg3 PUSCH may be repeatedly transmitted 4 times, and the Msg3 PUSCH including the DMRS A may be transmitted on two consecutive slots (ie, the third and fourth slots) from the last slot.
- the base station determines that the DMRS transmitted on at least one of the third slot and the fourth slot is DMRS A, the base station can know that the transmission of the Msg3 PUSCH ends in the fourth slot.
- 22 to 26 show a method of determining the number of modulation symbols for multiplexing uplink control information included in Msg3 PUSCH according to an embodiment of the present invention.
- the number of modulation symbols for transmission of uplink control information (UCI) per layer mapped to the Msg3 PUSCH may be calculated as in Equation (2). Equation 2 may also be used to calculate the number of modulation symbols when multiplexing and transmitting HARQ-ACK to PUSCH.
- UCI uplink control information
- O UCI means the number of bits indicating whether or not repeated transmission of the Msg3 PUSCH is performed and the number of repeated transmissions.
- L UCI means the number of CRC bits used for channel coding O UCI .
- ⁇ PUSCH offset is an offset value for determining the number of resources for mapping UCI to Msg3 PUSCH, and may be set through SIB.
- C UL-SCH means the number of code blocks (CBs) included in the Msg3 PUSCH.
- K r means the size of the r-th CB included in the Msg3 PUSCH.
- M UCI sc (l) means the number of REs that can be used for UCI transmission in the l-th symbol of the Msg3 PUSCH.
- N PUSCH symb all means the total number of symbols used for Msg3 PUSCH transmission including DMRS. may be set through SIB as a scaling value.
- l 0 means the first PUSCH symbol index other than the DMRS after the DMRS symbol.
- M UCI sc (l) is 0, otherwise M UCI sc (l) is M PUSCH sc - M PT-RS sc (l).
- M PUSCH sc means the number of subcarriers scheduled for PUSCH in the frequency domain
- M PT-RS sc (l) means the number of subcarriers of the l-th PUSCH symbol including the PTRS.
- the UE may multiplex UCI to PUSCH based on Q' UCI modulation symbols (number of REs) calculated from Equation (2).
- Q' UCI modulation symbols may be mapped to Q' UCI REs of Msg3 PUSCH.
- the mapping method may be the same as the mapping method when HARQ-ACK is multiplexed to PUSCH. That is, Q' UCI REs may be selected from the symbol immediately following the DMRS symbol of the Msg3 PUSCH.
- a UE that does not support repeated transmission of Msg3 PUSCH cannot transmit Msg3 PUSCH through UCI multiplexing. Therefore, when the base station receives the Msg3 PUSCH, it is necessary to determine whether the UCI is multiplexed. For example, if the size of the UCI bit is less than or equal to 2 bits, the UE punctures Q' UCI REs among REs in which the Msg3 PUSCH is transmitted, and transmits the UCI from the Q' UCI REs. . Accordingly, the base station may not need to distinguish whether or not UCI is multiplexed. That is, the mapping of the Msg3 PUSCH may not change according to Q' UCI REs through which UCI is transmitted.
- the Msg3 PUSCH may be transmitted in a rate-matching manner around Q' UCI REs to which UCI is mapped.
- the base station has to decode the Msg3 PUSCH twice because the mapping of the Msg3 PUSCH may be changed according to different rate-matching when the UCI is multiplexed and when the UCI is not multiplexed. Therefore, in order to reduce the number of decoding of the base station, the size of the UCI bit needs to be limited to 2 bits or less.
- the UCI bit may indicate that the number of repeated transmissions of the Msg3 PUSCH is 1 or R.
- R may be a value set in SIB. 1 is not separately set, and when the value of the UCI bit is '0', it may be determined that the number of repeated transmissions is always 1.
- the UCI bit may indicate that the number of repeated transmissions of the Msg3 PUSCH is R_1 or R_2.
- the R_1 and R_2 values may be values set in the SIB. In this case, the values of R_1 and R_2 may not be 1.
- the UCI bit may indicate that i) the number of repeated transmissions of the Msg3 PUSCH is 1, R_1, R_2, or R_3.
- R_1, R_2, and R_3 may be values set in the SIB. 1 is not separately set, and when the UCI bit is '00', it may be determined that the number of repeated transmissions is always 1.
- the UCI bit may indicate that the number of repeated transmissions of the Msg3 PUSCH is R_1, R_2, R_3, or R_4.
- R_1, R_2, R_3, and R_4 may be values set in the SIB.
- the size of the UCI bit should be greater than 2 bits.
- a method of transmitting UCI exceeding 2 bits will be described.
- the UE may generate sub-UCI by grouping UCI bits by at most 2 bits.
- the UE may transmit the sub-UCI in the first slot and the second slot, respectively.
- the UE may transmit by multiplexing the first sub-UCI on the Msg3 PUSCH on the first slot and multiplexing on the second sub-UCI on the Msg3 PUSCH on the second slot for transmission.
- the base station may generate all UCI bits by receiving the first sub-UCI and the second sub-UCI transmitted in each of the first slot and the second slot.
- the base station may determine the number of repeated transmissions of the Msg3 PUSCH based on all UCI bits.
- the UE may transmit the Msg3 PUSCH by multiplexing the 1-bit UCI bit value '0' or '1' to the Msg3 PUSCH on every slot.
- the UCI bit value '0' may indicate that the Msg3 PUSCH is repeatedly transmitted in a slot after the slot in which the Msg3 PUSCH multiplexed with the UCI bit value '0' is transmitted.
- a UCI bit value of '1' may indicate that a slot in which the Msg3 PUSCH in which the UCI bit value of '1' is multiplexed is transmitted is the last slot in which the Msg3 PUSCH is transmitted. Referring to FIG.
- the UE may multiplex the UCI bit value '0' to the Msg3 PUSCH transmitted on the first slot. This is because the Msg3 PUSCH is repeatedly transmitted in the second slot (slots after the first slot).
- the UE may multiplex the UCI bit value '1' to the Msg3 PUSCH transmitted on the second slot. This is because the second slot is the last slot in which the Msg3 PUSCH is repeatedly transmitted.
- the UE may multiplex the UCI bit value '0' to the Msg3 PUSCH transmitted on the first, second, and third slots, respectively.
- the UE may multiplex the UCI bit value of '1' to the Msg3 PUSCH transmitted on the fourth slot. This is because the fourth slot is the last slot in which the Msg3 PUSCH is repeatedly transmitted.
- the base station does not receive the Msg3 PUSCH multiplexed with the UCI bit value '1', it is determined the slot in which the repeatedly transmitted Msg3 PUSCH ends. Can not.
- the number of repeated transmissions of the Msg3 PUSCH is 2.
- the base station since the base station cannot check the UCI bit value of '1', there is a problem in that it cannot determine the slot in which the repeated transmission of the Msg3 PUSCH ends.
- the UE may multiplex the UCI bit value '1' to the Msg3 PUSCH transmitted on a specific number of consecutive slots.
- the specific number is a value determined based on the number of repeated transmissions of the Msg3 PUSCH and may be a predetermined value.
- the specific number may be half the number of repeated transmissions of the Msg3 PUSCH. Specifically, when the Msg3 PUSCH is repeatedly transmitted 2 times, the specific number may be 1, and when the Msg3 PUSCH is repeatedly transmitted 4 times, the specific number may be 2. In other words, when the Msg3 PUSCH is repeated R times, the specific number may be f(R/2).
- f(x) may be a function that returns any one of rounding off, rounding off, and rounding up values of x.
- a specific number of consecutive slots may be selected from the last slot in which the Msg3 PUSCH is repeatedly transmitted. It can be selected from the last slot that is repeatedly transmitted.
- the Msg3 PUSCH may be repeatedly transmitted 4 times.
- the UE may transmit the Msg3 PUSCH by multiplexing the UCI bit value '1' to each of the Msg3 PUSCHs transmitted on two consecutive slots (third and fourth slots) from the last repeated transmission slot of the Msg3 PUSCH. Comparing FIG. 24(c) and FIG. 25(c), in FIG.
- the base station confirms the UCI bit value '1' multiplexed to the Msg3 PUSCH transmitted on at least one of the third slot and the fourth slot. Then, the base station can confirm that the Msg3 PUSCH ends in the fourth slot.
- the base station may determine that the Msg3 PUSCH in which the UCI bit value '1' is not multiplexed is the same as that in which the UCI bit value '1' is multiplexed.
- the UE may transmit the Msg3 PUSCH by multiplexing the UCI to the Msg3 PUSCH for every predetermined slot.
- the UE may transmit the Msg3 PUSCH by bundling N slots in which the Msg3 PUSCH is repeatedly transmitted and multiplexing the UCI into the first slot among the N bundled slots.
- the bundled N slots may be described as a slot bundle. If the Msg3 PUSCH is repeatedly transmitted in the slot bundle after the first slot bundle, the UE may multiplex the UCI bit value '0' to the Msg3 PUSCH transmitted on the (first) slot included in the first slot bundle.
- the UE may multiplex the UCI bit value of '1' to the Msg3 PUSCH transmitted on the (first) slot included in the first slot bundle. That is, the first slot bundle may be a slot bundle in which the Msg3 PUSCH is last transmitted.
- the terminal may configure a slot bundle by bundling two slots. The UE may multiplex the UCI bit value of '1' to the Msg3 PUSCH transmitted on the first slot among the first slot bundles. This is because the Msg3 PUSCH is not repeatedly transmitted in the slot bundle after the first slot bundle. Referring to FIG.
- the UE may configure a slot bundle by bundling two slots.
- the UE may multiplex the UCI bit value '0' to the Msg3 PUSCH transmitted on the first slot among the first slot bundles. This is because the Msg3 PUSCH is repeatedly transmitted in the second slot bundle (slot bundle after the first slot bundle).
- the UE may multiplex the UCI bit value '1' to the Msg3 PUSCH transmitted on the first slot of the second slot bundle. This is because the Msg3 PUSCH is not repeatedly transmitted in the slot bundle after the second slot bundle.
- the base station may set the direction of the symbol for TDD operation.
- the base station may set the cell common symbol direction to the terminal.
- the symbol direction may be configured through SIB1 transmitted to a UE existing in a cell.
- the base station may configure a cell common symbol direction through tdd-UL-DL-ConfigurationCommon of SIB1.
- the cell common symbol direction may be determined as any one of a UL symbol, a DL symbol, and a flexible symbol.
- the cell common UL symbol means a symbol used only for uplink transmission.
- the cell common DL symbol means a symbol used only for downlink transmission.
- the cell common flexible symbol is a symbol in which a specific direction is not determined, and means a symbol that can be changed to a UL symbol or a DL symbol through a separate configuration.
- the base station may additionally set a symbol direction specific to each terminal to the terminal.
- a symbol direction specific to each terminal may be set through RRC signaling during a random access process.
- the UE may receive a UE-specific symbol direction specific to each UE through tdd-UL-DL-ConfigurationDedicated. Since the directions of the cell common UL symbol and the cell common DL symbol have been determined, the directions can no longer be modified, and the cell common flexible symbol can be set to a UE-specific symbol direction.
- the UE-specific symbol direction may be determined as any one of a UE-specific UL symbol, a UE-specific DL symbol, and a UE-specific flexible symbol.
- the UE-specific UL symbol means a symbol used only for uplink transmission.
- the UE-specific DL symbol means a symbol used only for downlink transmission.
- the UE-specific flexible symbol is a symbol in which a specific direction is not determined, and means a symbol that can be changed to a UL symbol or a DL symbol through a separate configuration.
- the UE may set the cell common symbol direction through SIB1 received before receiving the RRC signaling and repeatedly transmit the Msg3 PUSCH. Therefore, the UE must repeatedly transmit the Msg3 PUSCH according to the cell common symbol direction. In this case, the UE cannot determine whether the cell common flexible symbol can be used for repeated Msg3 PUSCH transmission.
- the base station may set the cell common flexible symbol to another terminal as a terminal-specific DL symbol. In this case, when the UE repeatedly transmits the Msg3 PUSCH using the cell common flexible symbol, it may cause interference to other UEs. Therefore, it should be determined whether the cell common flexible symbol can be used for repeated transmission of the Msg3 PUSCH, and a method for determining it will be described below.
- the D slot of FIGS. 27 and 28 means a slot including the overlapping symbol when at least one of the symbols scheduled to transmit the Msg3 PUSCH overlaps the cell common DL symbol.
- the U slot means a slot including the overlapping symbols when all symbols scheduled to transmit the Msg3 PUSCH overlap the cell common UL symbol.
- the F slot means a slot including the overlapping symbol when at least one of the symbols scheduled to transmit the Msg3 PUSCH overlaps the cell common flexible symbol (in this case, the symbols scheduled to transmit the Msg3 PUSCH are cell common DL It does not overlap with symbols, and may overlap with cell common UL symbols).
- the UE may be configured to repeatedly transmit the Msg3 PUSCH in 6 consecutive slots.
- the Msg3 PUSCH may be transmitted in a slot in which the Msg3 PUSCH can be transmitted, and the Msg3 PUSCH may be dropped in the slot in which the Msg3 PUSCH cannot be transmitted.
- the UE may repeatedly transmit the Msg3 PUSCH in slots other than the D slot. That is, the UE may repeatedly transmit the Msg3 PUSCH on the F slot and the U slot, and may drop the Msg3 PUSCH scheduled on the D slot without transmitting it.
- the UE may repeatedly transmit the Msg3 PUSCH only in the U slot. That is, the UE may drop the Msg3 PUSCH scheduled on the D slot and the F slot without transmitting it. Since the UE transmits the Msg3 PUSCH using only the UL symbol, it does not interfere with other UEs. iii) Referring to FIG. 27(b), the UE may repeatedly transmit the Msg3 PUSCH only in the U slot. That is, the UE may drop the Msg3 PUSCH scheduled on the D slot and the F slot without transmitting it. Since the UE transmits the Msg3 PUSCH using only the UL symbol, it does not interfere with other UEs. iii) Referring to FIG.
- the UE performs the first transmission of repeated Msg3 PUSCH transmission in the slot indicated by the uplink grant (ie, the slot in which the first transmission among repeated Msg3 PUSCH transmissions is performed), and then the slot Msg3 PUSCH can be repeatedly transmitted only on the U slot.
- the UE may drop the Msg3 PUSCH scheduled for the F slot and the D slot after the slot indicated by the uplink grant without transmitting it.
- the slot indicated by the uplink grant may be determined based on the slot in which the uplink grant is received and the K2 value.
- the K2 value is a value set by the base station and may mean an offset value from the slot in which the uplink grant is received.
- the slot indicated by the uplink grant may be the n+K2th slot.
- the slot indicated by the uplink grant may be an F slot or a U slot.
- the base station may intentionally configure the cell common flexible symbol to be used for Msg3 PUSCH transmission.
- the UE may be configured to repeatedly transmit the Msg3 PUSCH 4 times, that is, to repeatedly transmit the Msg3 PUSCH in 4 slots. Therefore, the UE must determine four slots in which repeated transmission of the Msg3 PUSCH is possible.
- the UE may determine the remaining slots except for the D slot as slots capable of transmitting the Msg3 PUSCH. That is, the UE may repeatedly transmit the Msg3 PUSCH on the F slot and the U slot.
- the Msg3 PUSCH may be transmitted using the cell common flexible symbol, there is a possibility of causing interference to other terminals.
- the UE may repeatedly transmit the Msg3 PUSCH only in the U slot. That is, the UE cannot repeatedly transmit the Msg3 PUSCH on the F slot and the U slot.
- the Msg3 PUSCH is repeatedly transmitted in a later slot compared to the method described with reference to FIG. 28(a) (method i)
- since the Msg3 PUSCH is repeatedly transmitted only in the U slot there is an effect of not affecting other terminals.
- the UE performs the first transmission of repeated Msg3 PUSCH transmission in the slot indicated by the uplink grant (ie, the slot in which the first transmission among repeated Msg3 PUSCH transmissions is performed).
- the Msg3 PUSCH can be repeatedly transmitted only on the U slot.
- the UE may drop the Msg3 PUSCH scheduled for the F slot and the D slot after the slot indicated by the uplink grant without transmitting it.
- the slot indicated by the uplink grant may be determined based on the slot in which the uplink grant is received and the K2 value.
- the K2 value is a value set by the base station and may mean an offset value from the slot in which the uplink grant is received. That is, when the slot in which the uplink grant is received is the nth slot, the slot indicated by the uplink grant may be the n+K2th slot. In this case, the slot indicated by the uplink grant may be an F slot or a U slot.
- the base station may intentionally configure the cell common flexible symbol to be used for Msg3 PUSCH transmission.
- the base station may set to use any one of the methods described with reference to FIGS. 27 and 28 through the uplink grant.
- the base station may configure a method for determining a slot in which the Msg3 PUSCH is repeatedly transmitted using some bits of a specific field of the uplink grant, and the terminal may repeatedly transmit the Msg3 PUSCH based on the configured method.
- the Msg3 PUSCH may mean the initial transmission of the Msg3 PUSCH and the retransmission of the Msg3 PUSCH.
- the cell common DL symbol may additionally include symbols in which the Type-0 common search space (CSS) of CORESET0 is set.
- CORESET0 indicates CORESET indicated by a physical broadcast channel (PBCH).
- PBCH physical broadcast channel
- the Type-0 common search space is a search space monitoring DCI format 1_0 for scheduling a PDSCH transmitting SIB1.
- the DCI format is SI-RNTI in which CRC is scrambled. That is, the terminal considers a symbol for which reception of Type-0 CSS of CORESET0 is set as a symbol capable of only downlink reception.
- the cell common DL symbol may additionally include symbols for which Type-0A Common Search Space (CSS) of CORESET0 is set.
- Type-0A CSS may be a search space for monitoring DCI of DCI format 1_0 for scheduling PDSCH including SIB except SIB1.
- CRC may be scrambled with SI-RNTI for DCI.
- the cell common DL symbol may additionally include symbols for which Type-1 CSS of CORESET0 is set.
- Type-1 CSS may be a search space for monitoring DCI scheduling Msg2 PDSCH or Msg 4 PDSCH.
- DCI may be scrambled CRC with RA-RNTI, MsgB-RNTI, or TC-RNTI.
- the cell common DL symbol may additionally include symbols for which Type-2 CSS of CORESET0 is set.
- Type-2 CSS may be a search space for monitoring DCI transmitting paging information.
- DCI may be scrambled CRC with P-RNTI.
- the cell common DL symbol may additionally include symbols for which Type-3 CSS of CORESET0 is set.
- Type-3 CSS may be a search space for monitoring DCI having various cell common DCI formats.
- DCI is INT-RNTI, SFI-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI, CI-RNTI, C-RNTI, MCS-C-RNTI, CS-RNTI(s) , or CRC may be scrambled with PS-RNTI.
- the cell common DL symbol may further include symbols configured to receive an SS/PBCH block.
- a symbol configured to receive the SS/PBCH block may be configured through SIB1, and specifically may be configured through ssb-PositionsInBurst of SIB1. That is, the UE may determine that the symbol configured to receive the SS/PBCH block is a symbol capable of receiving only the downlink channel.
- the cell common UL symbol may further include symbols configured to transmit the PRACH.
- a symbol configured to transmit the PRACH may be a symbol corresponding to a valid RACH occasion (RACH occasion, RO).
- the terminal may receive the PRACH configuration through SIB1 from the base station.
- PRACH configuration may be set through rach-ConfigCommon of initialUplinkBWP of UplinkConfigCommonSIB of ServingCellConfigCommonSIB of SIB1.
- the UE may determine a valid RO through the PRACH configuration.
- a method of determining a valid RO will be described.
- an RO that does not precede the SS/PBCH block and is more than N gap symbols away from the last symbol of the SS/PBCH block may be determined as a valid RO.
- the UE may transmit the PRACH using a valid RO. That is, the base station may consider that a valid RO is used for uplink channel transmission.
- the cell common UL symbol may include a valid RO before N gap symbol.
- the symbol for which transmission of the PRACH is scheduled may be a symbol corresponding to a valid RO. This is because the UE does not receive a downlink channel or signal in the N gap symbol. Therefore, the base station may consider that the N gap symbol is used for uplink transmission.
- N gap may be 0 if the subcarrier spacing of PRACH is 1.25 kHz or 5 kHz, and may be 2 if 15 kHz, 30 kHz, 60 kHz, or 120 kHz.
- the base station may set a long PUCCH (ie, PUCCH formats 1, 3, 4) to be repeatedly transmitted in 2, 4, or 8 slots for the coverage of the PUCCH of the UE.
- PUCCH formats 1, 3, 4 When the UE enters the RRC connected mode (RRC_CONNECTED mode) after the initial cell access, the UE may receive the number of repeated PUCCH transmissions (nrofSlots) for each PUCCH format through UE-specific system information. For example, when the PUCCH format transmitted on the resource configured by the UE includes all of PUCCH formats 1, 3, and 4, the number of repeated transmissions of each PUCCH format may be set to a different number of repeated PUCCH transmissions (nrofSlots). .
- N slots in which PUCCH transmission is configured or sequentially from the indicated slot can be determined.
- a slot in which PUCCH transmission is possible should not overlap a DL symbol in which a symbol scheduled for PUCCH transmission in the slot is configured to be semi-static or a symbol configured for reception of an SS/PBCH block.
- the UE does not transmit PUCCH in the corresponding slot, and the corresponding slot is N for PUCCH transmission It may not be included in the number of slots.
- the UE may receive a new PUCCH repeated transmission configuration from the base station before completing the repeated PUCCH transmission as many times as the number of repeated PUCCH transmissions previously set by the base station.
- the terminal enters the RRC connected mode (RRC_CONNECTED mode) after the initial cell access, it is set to repeatedly transmit PUCCH N times through terminal-specific system information. ), it is possible to reduce the overhead of the uplink control channel and the uplink interference by receiving a new setting for repeated transmission.
- the UE may be newly configured to repeatedly transmit PUCCH M (>N) times to increase the coverage of the uplink control channel.
- the number of repeated transmissions (M) may include 1. That is, when the UE receives a configuration for repeated transmission of a new PUCCH, it may ignore the previously configured configuration for repeated transmission of the PUCCH and repeatedly transmit a new PUCCH based on the configuration for repeated transmission of a new PUCCH.
- the terminal may receive explicit information from the base station to determine the number of repeated transmissions of the new PUCCH.
- the explicit information may be the number of PUCCH repetitions.
- Explicit information may be included in the DCI included in the PDCCH scheduling the PDSCH corresponding to the PUCCH.
- the PDSCH corresponding to the PUCCH may be a PUCCH including HARQ-ACK information of the corresponding PDSCH.
- the number of repeatable PUCCH transmissions that can be indicated may be one of ⁇ 1, 2, 4, 8 ⁇ .
- the base station may set the number of repeated PUCCH transmissions among the number of repeatable PUCCH transmissions that can be indicated as explicit information. For example, the base station may set ⁇ 2, 4 ⁇ among the repeated transmission times ⁇ 1, 2, 4, 8 ⁇ of the PUCCH as explicit information.
- the number of repeatable PUCCH transmissions that can be indicated may be one of ⁇ 1, 2, 4, 8, N ⁇ .
- N may be a preset value for each PUCCH format.
- the base station may set the number of repeated transmissions of a plurality of PUCCHs among the number of repetitions of the indicated PUCCHs as explicit information.
- the number of repeated transmissions of a plurality of PUCCHs set as explicit information may include N.
- the base station may set ⁇ 2, N ⁇ among the number of repeated PUCCH transmissions ⁇ 1, 2, 4, 8, N ⁇ as explicit information.
- the number of repeatable PUCCH transmissions that can be indicated may include at least one of ⁇ N/4 N/2, N, 2*N, 4*N ⁇ .
- the base station may set ⁇ N/2, N ⁇ as the number of repeated transmissions of the PUCCH.
- N/4 is set as explicit information
- 4*N is set as explicit information
- the number of repeated PUCCH transmissions may be set differently for each PUCCH format. Even if a resource for PUCCH transmission is newly set to the UE, and the UE performs a new PUCCH transmission, if the previous PUCCH format and the newly configured PUCCH format are the same, the UE sets the PUCCH newly set by the number of repeated transmissions corresponding to the PUCCH format. can be repeatedly transmitted. For example, the PUCCH format transmitted from the resource in which the PUCCH resource ID is set to 0 is PUCCH format 1, the number of repeated transmissions is 8, and the PUCCH format transmitted from the resource in which the PUCCH resource ID is set to 1 is PUCCH format 1 and the number of repeated transmissions may be set to 2.
- the UE when the PUCCH resource ID indicated in the PRI (PUCCH resource indicator, PRI) field of the DCI included in the PDCCH of the PDSCH corresponding to the PUCCH is 0, the UE repeatedly transmits the PUCCH of PUCCH format 1 in 8 slots, and PUCCH
- the resource ID is 1
- PUCCH format 1 of PUCCH may be repeatedly transmitted in two slots.
- the number of repeated PUCCH transmissions for each resource through which the PUCCH is transmitted may be one of ⁇ 1, 2, 4, 8 ⁇ .
- the UE when the number of repeated transmissions of the PUCCH is not set in the resource in which the PUCCH is transmitted, the UE may repeatedly transmit the PUCCH according to the number of repeated transmissions set according to the PUCCH format.
- the base station configures frequency hopping when the terminal is configured to enable repeated transmission of the PUCCH.
- the UE may divide the PUCCH in half in the time domain to map two hops in a slotted slot configured to transmit the PUCCH, and transmit the two hops to the base station.
- the PUCCH may or may not be repeatedly transmitted. If the length (number) of symbols allocated to transmit PUCCH in one slot is number of symbols, floor(number of symbols/2) symbols are mapped to the first hop, and number of symbols - floor(number) to the second hop of symbols/2) symbols can be mapped.
- a first hop may be transmitted on a first frequency band and a second hop may be transmitted on a second frequency band.
- the PRB of the first hop may consist of as many PRBs as PRBs corresponding to the number of PRBs set by the base station from a PRB corresponding to a starting PRB index set by the base station.
- the PRB of the second hop may consist of as many PRBs as PRBs corresponding to the number of PRBs set by the base station from a PRB corresponding to a PRB index set by the base station at which the second hop starts.
- the repeated transmission slot index (slot index for repetition) may be sequentially indexed based on the first slot of the repeated PUCCH transmission.
- the repetition transmission index of the slot in which the first PUCCH is transmitted may be 0.
- Repeat transmission slot indexes may be sequentially indexed for slots after the slot in which the first PUCCH is transmitted.
- the repeated transmission slot index may be determined regardless of whether repeated transmission of the PUCCH is possible on the corresponding slot. For example, when the terminal is set to repeatedly transmit PUCCH 4 times in slot X, the terminal sets the index of slot X to 0, the index of slot X+1 to 1, the index of slot X+2 to 2, and slot X+ The index of 3 may be determined to be 3.
- the UE may map the PUCCH to the first hop in the slot corresponding to the even-numbered repeated transmission slot index based on the determined repeated transmission slot index.
- the UE may map the PUCCH to the second hop in the slot corresponding to the odd-numbered repeated transmission slot index.
- a first hop may be transmitted on a first frequency band and a second hop may be transmitted on a second frequency band.
- the PRB of the first hop may consist of as many PRBs as PRBs corresponding to the number of PRBs set by the base station from a PRB corresponding to a starting PRB index set by the base station.
- the PRB of the second hop may consist of as many PRBs as PRBs corresponding to the number of PRBs set by the base station from a PRB corresponding to a PRB index set by the base station at which the second hop starts.
- the base station may set either of the intra-slot frequency hopping or the inter-slot frequency hopping to the terminal.
- the base station may configure whether or not to perform frequency hopping within a slot for each resource in which transmission of each PUCCH is configured. For example, when a resource having a PUCCH resource ID of 1 in a resource set having a PUCCH resource set ID of 0 is configured, the UE may be configured with respect to whether frequency hopping is possible within a slot. When the base station sets that intra-slot frequency hopping is possible, the terminal can transmit PUCCH through intra-slot frequency hopping, and when the base station sets that intra-slot frequency hopping is not possible, the terminal does not perform intra-slot frequency hopping PUCCH may be transmitted.
- the base station may set whether to perform inter-slot frequency hopping for each PUCCH format. For example, the base station may configure whether inter-slot frequency hopping is possible for PUCCH of PUCCH format 1. When the base station configures that inter-slot frequency hopping is possible, the UE may transmit the PUCCH through inter-slot frequency hopping regardless of the resource for which the PUCCH is configured. When the base station sets that inter-slot frequency hopping is not possible, the terminal may transmit the PUCCH according to the resource configured for the PUCCH. That is, the UE may transmit the PUCCH according to whether frequency hopping is possible in a slot configured for each resource in which transmission of the PUCCH is configured.
- the UE When the UE is configured to enable inter-slot frequency hopping for a specific PUCCH format, it can be expected that the resource in which the PUCCH of the specific PUCCH format is transmitted is not configured for intra-slot frequency hopping. That is, when the base station sets that inter-slot frequency hopping according to the PUCCH format is possible, the base station may not set intra-slot frequency hopping according to the resource through which the PUCCH is transmitted.
- the base station may configure the number of repeated transmissions (N) greater than 1 and that intra slot hopping is possible for the first repeatedly transmitted PUCCH of a specific PUCCH format. Thereafter, the UE may receive the number of repeated transmissions of the new PUCCH set to 1. In this case, since intra-slot hopping is set to be possible, the UE may not expect that the corresponding PUCCH is set to enable inter-slot frequency hopping. That is, when a PUCCH of a specific PUCCH format is configured to perform inter-slot frequency hopping, the new PUCCH is not transmitted through intra-slot frequency hopping regardless of the number of repeated transmissions of the new PUCCH. Therefore, there is a need for a method of determining a frequency hopping method according to the number of repeated transmissions of a new PUCCH.
- 29 shows a method of determining a frequency hopping method according to the number of repeated PUCCH transmissions according to an embodiment of the present invention.
- the UE may determine the frequency hopping method by differently interpreting the higher layer field according to the number of repeated transmissions of the new PUCCH. Specifically, the UE may interpret the intra-slot frequency hopping or inter-slot frequency hopping value among the higher layer fields according to whether the number of repeated PUCCH transmissions is 1.
- nrofSlots indicates the number of repeated PUCCH transmissions configured from the base station
- intraSlotFrequencyHopping indicates whether intra-slot frequency hopping is possible. If intraSlotFrequencyHopping is set to enabled, intra-slot frequency hopping may be performed. If not, intra-slot frequency hopping may not be performed.
- interslotFrequencyHopping indicates whether frequency hopping is performed between slots.
- inter-slot frequency hopping may be performed. If not, inter-slot frequency hopping may not be performed.
- the UE may check whether intra-slot frequency hopping is set to enabled regardless of whether inter-slot frequency hopping of an upper layer is set.
- intra-slot frequency hopping is set to enabled, the UE may transmit a new PUCCH by performing intra-slot frequency hopping.
- the UE may first check whether inter-slot frequency hopping is set to enabled in an upper layer.
- inter-slot frequency hopping is set to enabled, the UE may repeatedly transmit a new PUCCH by performing inter-slot frequency hopping.
- PUCCH may be transmitted by performing only inter-slot frequency hopping regardless of whether intra-slot frequency hopping is set.
- inter-slot frequency hopping is not set to enabled, the UE may check whether intra-slot frequency hopping is set to enabled in an upper layer. If intra-slot frequency hopping is enabled, the UE repeatedly transmits a new PUCCH by performing intra-slot frequency hopping. If intra-slot frequency hopping is not set to enabled, the UE repeatedly transmits the PUCCH without performing frequency hopping. can
- the UE may be configured with whether frequency hopping between slots is possible for each PUCCH format.
- the UE may be configured to determine whether intra-slot frequency hopping is possible for each resource configured to transmit the PUCCH.
- the terminal may receive a set number of repeated transmission of the PUCCH.
- the UE may determine whether to perform inter-slot frequency hopping according to whether a resource configured to transmit the PUCCH is capable of intra-slot frequency hopping based on the number of repeated transmissions. If the number of repeated transmissions is 1, frequency hopping between slots may not be performed.
- the UE may perform inter-slot frequency hopping regardless of whether intra-slot frequency hopping is configured. Conversely, if the number of repeated transmissions is greater than 1 and it is set that inter-slot frequency hopping according to the PUCCH format is not possible, the UE may perform frequency hopping according to whether intra-slot frequency hopping is configured.
- the frequency hopping method of PUSCH may be configured from a higher layer.
- the UE may determine the frequency hopping method by differently interpreting the bits of the frequency hopping flag in DCI corresponding to the new PUSCH according to the number of repeated transmissions of the new PUSCH.
- the DCI may be a DCI of a PDCCH scheduling a PUSCH.
- the UE may interpret the 1-bit frequency hopping flag differently depending on whether the number of repeated transmissions of the new PUSCH is 1 or not. i) When the number of repeated transmissions of the new PUSCH set by the UE is 1 and the bit value of the frequency hopping flag is 0, the UE may transmit the PUSCH without performing frequency hopping.
- the UE may transmit the PUSCH by performing intra-slot frequency hopping.
- the UE may perform intra-slot frequency hopping to transmit the PUSCH.
- the UE may repeatedly transmit the PUSCH by performing inter-slot frequency hopping.
- the UE may transmit the PUSCH without performing frequency hopping.
- the UE may transmit the PUSCH by performing intra-slot frequency hopping.
- the UE may repeatedly transmit the PUSCH without performing frequency hopping.
- the UE may repeatedly transmit the PUSCH by performing inter-slot frequency hopping.
- the UE receives the number of repeated transmissions of the new PUSCH and the frequency hopping method through one pair, and interprets the bits of the frequency hopping flag of the DCI corresponding to the new PUSCH differently to determine the number of repeated transmissions of the new PUSCH and the frequency hopping method can be decided
- the DCI corresponding to the new PUSCH may be the DCI of the PDCCH scheduling the PUSCH.
- the terminal receives the number of repeated transmissions of the new PUSCH and the frequency hopping method in the form of a pair (ie, the number of repeated transmissions, the hopping method)) from the base station through DCI corresponding to the new PUSCH, and transmits the new PUSCH.
- up to two (number of repeated transmissions, hopping method) may be set.
- the hopping method may be one of three cases in which intra-slot frequency hopping, inter-slot frequency hopping, and frequency hopping are not performed.
- the above-described new PUSCH may be a new Msg3 PUSCH scheduled by an uplink grant of a random access response.
- the number of repeated transmissions of the new Msg3 PUSCH may be included in the uplink grant.
- a frequency hopping method when a new Msg3 PUSCH is repeatedly transmitted will be described.
- the base station may set a method for frequency hopping during repeated transmission of a new Msg3 PUSCH for frequency diversification gain.
- the frequency hopping method may be set by a 1-bit value of a frequency hopping flag of an uplink grant of a random access response for scheduling a new Msg3 PUSCH.
- the frequency hopping method may be set by the 1-bit value of the frequency hopping flag of DCI format 0_0 scrambled with the TC-RNTI scheduling the retransmission Msg3 PUSCH.
- the bit value of the frequency hopping flag is 0, the UE may repeatedly transmit a new Msg3 PUSCH without performing frequency hopping.
- the UE When the bit value of the frequency hopping flag is 1, the UE performs intra-slot frequency hopping to obtain a new Msg3 PUSCH. It can be transmitted repeatedly.
- the UE repeatedly transmits the Msg3 PUSCH if inter-slot frequency hopping is possible in terms of DMRS overhead, inter-slot frequency hopping may be more advantageous than intra-slot frequency hopping.
- a method for the UE to repeatedly transmit a new Msg3 PUSCH by performing inter-slot frequency hopping will be described.
- the UE may determine the frequency hopping method by interpreting the bits of the frequency hopping flag according to the number of repeated transmissions of the new Msg3 PUSCH. Specifically, the UE may interpret the frequency hopping flag differently from the existing ones according to whether the number of repeated transmissions of the new Msg3 PUSCH is 1 or not. For example, i) If the number of repeated transmissions of the new Msg3 PUSCH set by the UE is 1 and the bit value of the frequency hopping flag is 0, the UE may repeatedly transmit a new Msg3 PUSCH without performing frequency hopping.
- the UE may perform intra-slot frequency hopping to transmit a new Msg3 PUSCH.
- the UE may repeatedly transmit a new Msg3 PUSCH by performing intra-slot frequency hopping.
- the UE may repeatedly transmit a new Msg3 PUSCH by performing inter-slot frequency hopping.
- the UE may transmit a new Msg3 PUSCH without performing frequency hopping.
- the UE may perform intra-slot frequency hopping to transmit a new Msg3 PUSCH.
- the UE may determine to repeatedly transmit a new Msg3 PUSCH without performing frequency hopping.
- the UE may repeatedly transmit a new Msg3 PUSCH by performing inter-slot frequency hopping.
- the UE receives the number of repeated transmissions of the new Msg3 PUSCH and the frequency hopping method through one pair, and interprets bits of the frequency hopping flag differently to determine the number of repeated transmissions of the new Msg3 PUSCH and the frequency hopping method. Specifically, the terminal receives the number of repeated transmissions of the new PUSCH and the frequency hopping method in the form of a pair (ie, the number of repeated transmissions, the hopping method)) through the DCI corresponding to the new PUSCH from the base station, and transmits the new Msg3 PUSCH. .
- a pair indicating the number of repeated transmissions of a new PUSCH and a frequency hopping method may be determined by an uplink grant of a random access response scheduling Msg3 PUSCH or a frequency hopping flag of DCI having DCI format 0_0.
- up to two (number of repeated transmissions, hopping method) may be set.
- the hopping method may be one of three cases in which intra-slot frequency hopping, inter-slot frequency hopping, and frequency hopping are not performed.
- FIG. 30 is a flowchart illustrating a method for a terminal to transmit an Msg3 PUSCH according to an embodiment of the present invention.
- the terminal may receive a system information block 1 (System Information Block1, SIB1) from the base station (S3010).
- the terminal may transmit a preamble for a random access procedure to the base station (S3020).
- the terminal may receive a random access response (RAR) to the preamble from the base station (S3030).
- the random access response may include information for scheduling a physical uplink shared channel (PUSCH) transmitted by the terminal to the base station.
- the terminal may transmit the PUSCH to the base station based on the random access response (S3040).
- PUSCH physical uplink shared channel
- the SIB1 may include information on a set of repeated transmission number candidates including values for one or more repeated transmission times for performing repeated transmission of the PUSCH.
- the random access response may include information indicating any one of the values for the one or more repeated transmission times included in the repeated transmission number candidate set.
- the PUSCH may be transmitted repeatedly by any one of the values.
- the random access response may be a Physical Downlink Shared Channel (PDSCH) including an uplink (UL) grant (UL grant).
- the information indicating any one of the values includes a Time Domain Resource Assignment (TDRA) field, a Modulation Coding Scheme (MCS) field, and a Transmission Power Control of the random access response.
- TPC Transmission Power Control of the random access response.
- the one value When the information indicating the one value is included in the MCS field, the one value may be indicated by one or more Most Significant Bits (MSBs) among bits of the MCS field. Meanwhile, when information indicating the one value is included in the TPC field, the one value may be indicated by one or more Least Significant Bits (LSBs) among bits of the TPC field.
- MSBs Most Significant Bits
- LSBs Least Significant Bits
- Each of the values for the one or more repeated transmission times may be a power of two. Specifically, each of the values for the one or more repeated transmission times may be 1, 2, 4, and 8.
- the SIB1 may include at least one of information related to the preamble and an RACH opportunity.
- the PUSCH may be transmitted on a resource determined based on at least one of information related to the preamble and an RACH opportunity.
- the terminal may receive downlink control information (DCI) including information for scheduling a retransmission PUSCH from the base station.
- the terminal may repeatedly transmit the retransmission PUSCH to the base station based on the DCI.
- the information for scheduling the retransmission PUSCH may include information on the number of repetitions of the retransmission PUSCH.
- Information on the number of repetitions of the retransmission PUSCH may be included in the HARQ process number field of the DCI.
- the retransmission PUSCH may be the same as the PUSCH transmitted by the UE in step S3040.
- the DCI may be transmitted by the base station when the base station fails to receive the PUSCH transmitted by the terminal. That is, when the base station does not successfully receive the PUSCH transmitted by the terminal in step S3040, the base station may transmit information for scheduling the retransmission PUSCH to the terminal.
- the random access response may include a frequency hopping flag indicating whether the PUSCH is frequency hopping.
- the PUSCH may be intra-slot frequency hopping or inter-slot frequency hopping based on the one value and the frequency hopping flag. When any one of the values is 1, if the value of the frequency hopping flag indicates that the PUSCH is frequency hopping, the PUSCH may perform intra-slot frequency hopping. If the value of the frequency hopping flag indicates that the PUSCH does not perform frequency hopping, the PUSCH may not perform frequency hopping. Meanwhile, when any one of the values is greater than 1, if the value of the frequency hopping flag indicates that the PUSCH is frequency hopping, the PUSCH may perform inter-slot frequency hopping. If the value of the frequency hopping flag indicates that the PUSCH does not perform frequency hopping, the PUSCH may not perform frequency hopping. In this case, the PUSCH may be the retransmission PUSCH.
- the random access response may further include information on a resource on which the first repeated transmission of the PUSCH is performed.
- the information on the resource on which the first repeated transmission of the PUSCH is performed may be a slot offset value between the resource on which the random access response is received and the resource on which the first repeated transmission of the PUSCH is performed.
- the SIB1 may further include information related to a time division duplex (TDD) configuration, and the information related to the TDD configuration may be information on a type of symbols constituting a slot.
- the types of the symbols include a downlink symbol configured to be usable for downlink transmission, an uplink symbol configured to be usable for uplink transmission, and the downlink symbol or flexible not configured as the uplink symbol. ) may be any one of the symbols.
- the PUSCH may be repeatedly transmitted in units of slots.
- the resource on which the first repeated transmission of the PUSCH is performed may be a resource separated by the slot offset value from the resource from which the random access response is received.
- a resource on which the first repeated transmission of the PUSCH is performed may be a flexible slot, and repeated transmission after the first repeated transmission of the PUSCH may be performed on an uplink slot.
- the flexible slot may include at least one flexible symbol, and all of the uplink slots may include the uplink symbol.
- the PUSCH may be the retransmission PUSCH.
- the terminal performing the method described with reference to FIG. 30 may be the terminal described with reference to FIG. 11 .
- the terminal may be configured to include a communication module for transmitting and receiving wireless signals, and a processor for controlling the communication module.
- the processor of the terminal may perform the method of transmitting the Msg3 PUSCH described in this specification.
- the base station for receiving the Msg3 PUSCH transmitted by the terminal described in this specification may include a communication module for transmitting and receiving a radio signal, and a processor controlling the communication module.
- the base station may be the base station described with reference to FIG. 11 .
- the processor of the base station may perform the method of receiving the Msg3 PUSCH transmitted by the terminal described in this specification.
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Abstract
Description
Claims (20)
- 무선 통신 시스템에서, 상향링크 채널을 전송하는 방법에 있어서, 단말이 수행하는 방법은,기지국으로부터 시스템 정보 블록 1(System Information Block1, SIB1)을 수신하는 단계;상기 기지국으로 랜덤 액세스 절차를 위한 프리앰블을 전송하는 단계;상기 기지국으로부터 상기 프리앰블에 대한 랜덤 액세스 응답(Random Access Response, RAR)을 수신하는 단계,상기 랜덤 액세스 응답은 단말이 상기 기지국으로 전송하는 물리 상향링크 공유 채널(Physical Uplink Shared Channel, PUSCH)을 스케줄링하는 정보를 포함하고;상기 기지국으로 상기 랜덤 액세스 응답에 기초하여 상기 PUSCH를 전송하는 단계를 포함하고,상기 SIB1은 상기 PUSCH의 반복 전송을 수행하기 위한 하나 이상의 반복 전송 횟수에 대한 값을 포함하는 반복 전송 횟수 후보 세트에 대한 정보를 포함하고,상기 랜덤 액세스 응답은 상기 반복 전송 횟수 후보 세트에 포함된 상기 하나 이상의 반복 전송 횟수에 대한 값 중 어느 하나의 값을 지시하는 정보를 포함하고,상기 PUSCH는 상기 어느 하나의 값만큼 반복하여 전송되는 것을 특징으로 하는 방법.
- 제 1항에 있어서,상기 랜덤 액세스 응답은 상향링크(Uplink, UL) 그랜트(UL grant)를 포함하는 물리 하향링크 공유 채널(Physical Downlink Shared Channel, PDSCH)인 것을 특징으로 하는 방법.
- 제 1항에 있어서,상기 어느 하나의 값을 지시하는 정보는 상기 랜덤 액세스 응답의 시간 영역 자원 할당(Time Domain Resource Assignment, TDRA) 필드, 변조 코딩 방식(Modulation Coding Scheme, MCS) 필드 및 전송 전력 제어(Transmission Power Control, TPC) 필드 중 적어도 하나에 포함되는 것을 특징으로 하는 방법.
- 제 3항에 있어서,상기 어느 하나의 값을 지시하는 정보가 상기 MCS 필드에 포함되는 경우,상기 어느 하나의 값은 상기 MCS 필드의 비트들 중 하나 이상의 MSB(Most Significant Bit)에 의해 지시되는 것을 특징으로 하는 방법.
- 제 3항에 있어서,상기 어느 하나의 값을 지시하는 정보가 상기 TPC 필드에 포함되는 경우,상기 어느 하나의 값은 상기 TPC 필드의 비트들 중 하나 이상의 LSB(Least Significant Bit)에 의해 지시되는 것을 특징으로 하는 방법.
- 제 1항에 있어서,상기 SIB1은 상기 프리앰블과 관련된 정보 및 RACH 기회(occasion) 중 적어도 어느 하나를 포함하고,상기 PUSCH는 상기 프리앰블과 관련된 정보 및 상기 RACH 기회 중 적어도 어느 하나에 기초하여 결정되는 자원 상에서 전송되는 것을 특징으로 하는 방법.
- 제 1항에 있어서,상기 기지국으로부터, 재전송 PUSCH의 스케줄링을 위한 정보를 포함하는 하향링크 제어 정보(Downlink Control Information, DCI)를 수신하는 단계;상기 기지국으로, 상기 DCI에 기초하여 상기 재전송 PUSCH를 반복하여 전송하는 단계를 더 포함하고,상기 재전송 PUSCH의 스케줄링을 위한 정보는 상기 재전송 PUSCH의 반복 횟수에 대한 정보를 포함하고,상기 재전송 PUSCH의 반복 횟수에 대한 정보는 상기 DCI의 HARQ process number 필드에 포함되고,상기 재전송 PUSCH는, 상기 PUSCH와 동일하고,상기 DCI는 상기 기지국이 상기 단말이 전송하는 상기 PUSCH의 수신에 실패한 경우, 상기 기지국이 전송하는 것을 특징으로 하는 방법.
- 제 7항에 있어서,상기 DCI는 TC-RNTI로 스크램블링되고,상기 DCI의 포맷은 DCI 포맷 0_0인 것을 특징으로 하는 방법.
- 제 1항에 있어서,상기 하나 이상의 반복 전송 횟수에 대한 값 각각은 2의 거듭제곱인 것을 특징으로 하는 방법.
- 제 1항에 있어서,상기 하나 이상의 반복 전송 횟수에 대한 값 각각은 1, 2, 4 및 8인 것을 특징으로 하는 방법.
- 제 1항에 있어서,상기 랜덤 액세스 응답은 상기 PUSCH가 주파수 호핑하는지 여부를 나타내는 주파수 호핑 플래그를 포함하고,상기 PUSCH는 상기 어느 하나의 값 및 상기 주파수 호핑 플래그에 기초하여 슬롯 내(intra-slot) 주파수 호핑 또는 슬롯 간(inter-slot) 주파수 호핑하는 것을 특징으로 하는 방법.
- 제 11항에 있어서,상기 어느 하나의 값이 1인 경우,상기 주파수 호핑 플래그의 값이 상기 PUSCH가 주파수 호핑하는 것을 나타내면, 상기 PUSCH는 슬롯 내(intra-slot) 주파수 호핑하고,상기 주파수 호핑 플래그의 값이 상기 PUSCH가 주파수 호핑하지 않는 것을 나타내면, 상기 PUSCH는 주파수 호핑하지 않는 것을 특징으로 하는 방법.
- 제 11항에 있어서,상기 어느 하나의 값이 1보다 큰 경우,상기 주파수 호핑 플래그의 값이 상기 PUSCH가 주파수 호핑하는 것을 나타내면, 상기 PUSCH는 슬롯 간(inter-slot) 주파수 호핑하고,상기 주파수 호핑 플래그의 값이 상기 PUSCH가 주파수 호핑하지 않는 것을 나타내면, 상기 PUSCH는 주파수 호핑하지 않는 것을 특징으로 하는 방법.
- 제 1항에 있어서,상기 랜덤 액세스 응답은 상기 PUSCH의 첫번째 반복 전송이 수행되는 자원에 대한 정보를 더 포함하고,상기 PUSCH의 첫번째 반복 전송이 수행되는 자원에 대한 정보는 상기 랜덤 액세스 응답을 수신한 자원과 상기 PUSCH의 첫번째 반복 전송이 수행되는 자원 간의 슬롯 오프셋 값이고,상기 SIB1은 TDD(Time Division Duplex) 구성과 관련된 정보를 더 포함하고,상기 TDD 구성과 관련된 정보는 슬롯을 구성하는 심볼들의 타입(type)에 대한 정보이고,상기 심볼들의 타입은, 하향링크 전송에 사용 가능하도록 설정되는 하향링크 심볼, 상향링크 전송에 사용 가능하도록 설정되는 상향링크 심볼 및 상기 하향링크 심볼 또는 상기 상향링크 심볼로 설정되지 않은 플렉서블(flexible) 심볼 중 어느 하나이고,상기 PUSCH는 슬롯 단위로 반복 전송되고,상기 PUSCH의 첫번째 반복 전송이 수행되는 자원은, 상기 랜덤 액세스 응답을 수신한 자원으로부터 상기 슬롯 오프셋 값만큼 떨어진 자원인 것을 특징으로 하는 방법.
- 제 14항에 있어서,상기 PUSCH의 첫번째 반복 전송이 수행되는 자원은 플렉서블 슬롯이고,상기 PUSCH의 첫번째 반복 전송 이후 반복 전송은 상향링크 슬롯 상에서 수행되고,상기 플렉서블 슬롯은 적어도 하나의 상기 플렉서블 심볼을 포함하여 구성되고,상기 상향링크 슬롯은 모두 상기 상향링크 심볼로 구성되는 것을 특징으로 하는 방법.
- 무선 통신 시스템에서, 상향링크 채널을 전송하는 단말에 있어서, 상기 단말은,송수신기;상기 송수신기를 제어하는 프로세서를 포함하고,상기 프로세서는,기지국으로부터 시스템 정보 블록 1(System Information Block1, SIB1)을 수신하고,상기 기지국으로 랜덤 액세스 절차를 위한 프리앰블을 전송하고,상기 기지국으로부터 상기 프리앰블에 대한 랜덤 액세스 응답(Random Access Response, RAR)을 수신하고,상기 랜덤 액세스 응답은 단말이 상기 기지국으로 전송하는 물리 상향링크 공유 채널(Physical Uplink Shared Channel, PUSCH)을 스케줄링하는 정보를 포함하고,상기 기지국으로 상기 랜덤 액세스 응답에 기초하여 상기 PUSCH를 전송하고,상기 SIB1은 상기 PUSCH의 반복 전송을 수행하기 위한 하나 이상의 반복 전송 횟수에 대한 값을 포함하는 반복 전송 횟수 후보 세트에 대한 정보를 포함하고,상기 랜덤 액세스 응답은 상기 반복 전송 횟수 후보 세트에 포함된 상기 하나 이상의 반복 전송 횟수에 대한 값 중 어느 하나의 값을 지시하는 정보를 포함하고,상기 PUSCH는 상기 어느 하나의 값만큼 반복하여 전송되는 것을 특징으로 하는 단말.
- 제 16항에 있어서,상기 어느 하나의 값을 지시하는 정보는 상기 랜덤 액세스 응답의 시간 영역 자원 할당(Time Domain Resource Assignment, TDRA) 필드, 변조 코딩 방식(Modulation Coding Scheme, MCS) 필드 및 전송 전력 제어(Transmission Power Control, TPC) 필드 중 적어도 하나에 포함되는 것을 특징으로 하는 단말.
- 제 17항에 있어서,상기 어느 하나의 값을 지시하는 정보가 상기 MCS 필드에 포함되는 경우,상기 어느 하나의 값은 상기 MCS 필드의 비트들 중 하나 이상의 MSB(Most Significant Bit)에 의해 지시되는 것을 특징으로 하는 단말.
- 제 17항에 있어서,상기 어느 하나의 값을 지시하는 정보가 상기 TPC 필드에 포함되는 경우,상기 어느 하나의 값은 상기 TPC 필드의 비트들 중 하나 이상의 LSB(Least Significant Bit)에 의해 지시되는 것을 특징으로 하는 단말.
- 무선 통신 시스템에서 상향링크 채널을 수신하는 방법에 있어서, 기지국에 의해 수행되는 방법은,단말로 시스템 정보 블록 1(System Information Block1, SIB1)을 전송하는 단계;상기 단말로부터 랜덤 액세스 절차를 위한 프리앰블을 수신하는 단계;상기 단말로 상기 프리앰블에 대한 랜덤 액세스 응답(Random Access Response, RAR)을 전송하는 단계,상기 랜덤 액세스 응답은 단말이 상기 기지국으로 전송하는 물리 상향링크 공유 채널(Physical Uplink Shared Channel, PUSCH)을 스케줄링하는 정보를 포함하고;상기 단말로부터 상기 랜덤 액세스 응답에 기초한 상기 PUSCH를 수신하는 단계를 포함하고,상기 SIB1은 상기 PUSCH의 반복 전송을 수행하기 위한 하나 이상의 반복 전송 횟수에 대한 값을 포함하는 반복 전송 횟수 후보 세트에 대한 정보를 포함하고,상기 랜덤 액세스 응답은 상기 반복 전송 횟수 후보 세트에 포함된 상기 하나 이상의 반복 전송 횟수에 대한 값 중 어느 하나의 값을 지시하는 정보를 포함하고,상기 PUSCH는 상기 어느 하나의 값만큼 반복하여 전송되는 것을 특징으로 하는 방법.
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| KR1020237012554A KR20230087489A (ko) | 2020-10-11 | 2021-10-12 | 무선 통신 시스템에서 상향링크 채널을 전송하는 방법 및 이를 위한 장치 |
| CN202180077671.6A CN116458247A (zh) | 2020-10-11 | 2021-10-12 | 在无线通信系统中发送上行链路信道的方法及其装置 |
| EP21878078.1A EP4224770A4 (en) | 2020-10-11 | 2021-10-12 | Method for transmitting uplink channel in wireless communication system and apparatus therefor |
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| US18/387,034 US12245292B2 (en) | 2020-10-11 | 2023-11-04 | Method for transmitting uplink channel in wireless communication system and apparatus therefor |
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| JP2025117617A JP2025148493A (ja) | 2020-10-11 | 2025-07-11 | 無線通信システムにおいて上りリンクチャネルを送信する方法及びそのための装置 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220248378A1 (en) * | 2021-02-02 | 2022-08-04 | Qualcomm Incorporated | Early termination of pusch transmission |
| US11832310B2 (en) | 2020-10-11 | 2023-11-28 | Wilus Institute Of Standards And Technology Inc. | Method for transmitting uplink channel in wireless communication system and apparatus therefor |
| JP2025519104A (ja) * | 2022-05-23 | 2025-06-24 | 北京小米移動軟件有限公司 | マルチprach伝送設定方法、装置 |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240089983A1 (en) * | 2019-10-07 | 2024-03-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Systems and methods for control of configured ul and dl transmissions |
| CN113055067B (zh) * | 2019-12-27 | 2024-04-26 | 中兴通讯股份有限公司 | 下行信号处理方法、装置及基站 |
| US20240048275A1 (en) * | 2020-12-25 | 2024-02-08 | Sharp Kabushiki Kaisha | User equipments, base stations, and methods |
| WO2022151350A1 (en) * | 2021-01-15 | 2022-07-21 | Qualcomm Incorporated | Uplink control information (uci) multiplexed in uplink message with uplink message repetition |
| CN114866199B (zh) * | 2021-01-19 | 2024-07-12 | 大唐移动通信设备有限公司 | 一种信息确定方法、装置及存储介质 |
| CN117099435A (zh) * | 2021-03-18 | 2023-11-21 | 华为技术有限公司 | 一种通信方法、装置和系统 |
| US12418898B2 (en) * | 2021-03-23 | 2025-09-16 | Samsung Electronics Co., Ltd. | Transmission of uplink channels with repetitions |
| WO2022211124A1 (en) * | 2021-04-01 | 2022-10-06 | Sharp Kabushiki Kaisha | User equipments, base stations, and methods |
| US12199909B2 (en) * | 2021-04-19 | 2025-01-14 | Qualcomm Incorporated | Indication of message repetition and demodulation reference signal bundling capabilities |
| US20240215063A1 (en) * | 2021-07-01 | 2024-06-27 | Qualcomm Incorporated | Response to ue requesting msg3 pusch repetitions |
| WO2026075466A1 (ko) * | 2024-10-01 | 2026-04-09 | 엘지전자 주식회사 | 무선 통신 시스템에서 통신을 수행하기 위한 방법 및 장치 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180317263A1 (en) * | 2017-04-28 | 2018-11-01 | Sharp Laboratories Of America, Inc, | Random access procedure(s) for radio system |
| KR20200027048A (ko) * | 2017-08-02 | 2020-03-11 | 삼성전자주식회사 | 스케줄링 정보를 수신하는 방법, 장치, 정보를 송신하는 단말기, 기지국 및 방법 |
| US20200267764A1 (en) * | 2019-02-14 | 2020-08-20 | Nazanin Rastegardoost | Dynamic PRACH Scheduling using Slot Formats |
| KR20200109354A (ko) * | 2018-02-16 | 2020-09-22 | 텔레호낙티에볼라게트 엘엠 에릭슨(피유비엘) | Msg3 송신을 위한 시간 자원 할당 시그널링 메커니즘 |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101534169B1 (ko) * | 2008-12-23 | 2015-07-07 | 삼성전자 주식회사 | 주파수 도약 모드로 동작 중인 무선 통신 시스템의 주파수 할당 방법 및 이를 위한 장치 |
| US9313779B2 (en) * | 2012-07-27 | 2016-04-12 | Intel Corporation | Uplink control information transmission with large number of bits |
| EP3675566B1 (en) | 2014-01-29 | 2022-07-06 | InterDigital Patent Holdings, Inc. | Method and apparatus of access and link adaptation for coverage enhanced wireless transmissions |
| EP3113404B1 (en) | 2014-02-24 | 2019-04-03 | LG Electronics Inc. | Method for repetitive transmission for coverage extension, and corresponding terminal |
| US9603165B2 (en) | 2015-01-30 | 2017-03-21 | Telefonaktiebolaget L M Ericsson (Publ) | Random-access response with analog beamforming |
| MX376676B (es) * | 2015-09-25 | 2025-03-04 | Ericsson Telefon Ab L M | Métodos que proveen concesiones de enlace ascendente, incluyendo la configuración de dominio de tiempo y las terminales inalámbricas y redes de nodos relacionados. |
| CN116056234B (zh) | 2017-06-16 | 2025-08-19 | Lg电子株式会社 | 发送和接收物理上行链路控制信道的方法及其装置 |
| US11025296B2 (en) | 2018-01-30 | 2021-06-01 | Qualcomm Incorporated | Nested frequency hopping for data transmission |
| CN117856998A (zh) | 2018-05-04 | 2024-04-09 | 联想(新加坡)私人有限公司 | 使用聚合因子的pusch传输 |
| WO2019224876A1 (ja) | 2018-05-21 | 2019-11-28 | 株式会社Nttドコモ | 送信装置及び受信装置 |
| CN118631407A (zh) * | 2018-08-10 | 2024-09-10 | 苹果公司 | 用于新无线电超可靠低延时通信的物理上行链路共享信道增强 |
| JP2020061649A (ja) * | 2018-10-10 | 2020-04-16 | シャープ株式会社 | 基地局装置、端末装置、通信方法、および、集積回路 |
| CN112913316B (zh) | 2018-10-26 | 2024-05-03 | 华为技术有限公司 | 非授权频谱中随机接入信道的信道接入方法和装置 |
| JP7390111B2 (ja) | 2019-04-25 | 2023-12-01 | シャープ株式会社 | 基地局装置、端末装置、および、通信方法 |
| CN113099547B (zh) | 2020-01-09 | 2023-04-25 | 维沃移动通信有限公司 | Msg3的传输方法和设备 |
| US11903034B2 (en) | 2020-02-19 | 2024-02-13 | Intel Corporation | Aggregation indication for uplink transmission during random access channel procedures |
| US12108438B2 (en) | 2020-05-06 | 2024-10-01 | Qualcomm Incorporated | Dynamic slot aggregation indication for random access procedure |
| WO2021231816A1 (en) * | 2020-05-14 | 2021-11-18 | Convida Wireless, Llc | Initial access for reduced capability new radio devices |
| US20210360660A1 (en) | 2020-05-15 | 2021-11-18 | Samsung Electronics Co., Ltd. | Method and apparatus for coverage enhancement of msg3 |
| EP4085712A4 (en) * | 2020-07-08 | 2022-12-14 | ZTE Corporation | FLEXIBLE FREQUENCY HOPPING |
| CN119300147B (zh) * | 2020-07-17 | 2026-01-30 | 华为技术有限公司 | 一种通信方法及装置 |
| EP4189874A2 (en) * | 2020-07-31 | 2023-06-07 | Telefonaktiebolaget LM Ericsson (publ.) | Method and apparatus for transmitting csi report |
| EP4391675B1 (en) * | 2020-08-04 | 2026-04-29 | Telefonaktiebolaget LM Ericsson (publ) | Coverage enhancement of msg3 and msga transmissions on physical uplink shared channel |
| US20240215015A1 (en) | 2020-08-04 | 2024-06-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and Apparatus for PUSCH Repetition in a Random Access Procedure |
| CN114080043B (zh) * | 2020-08-12 | 2023-11-10 | 维沃移动通信有限公司 | 资源传输方法、装置及通信设备 |
| CN116326114A (zh) * | 2020-09-29 | 2023-06-23 | 高通股份有限公司 | 具有传输块缩放和跳频的物理上行链路共享信道重复 |
| WO2022071556A1 (en) * | 2020-09-30 | 2022-04-07 | Sharp Kabushiki Kaisha | User equipments, base stations, and methods |
| WO2022075828A1 (ko) | 2020-10-11 | 2022-04-14 | 주식회사 윌러스표준기술연구소 | 무선 통신 시스템에서 상향링크 채널을 전송하는 방법 및 이를 위한 장치 |
-
2021
- 2021-10-12 WO PCT/KR2021/014059 patent/WO2022075828A1/ko not_active Ceased
- 2021-10-12 EP EP21878078.1A patent/EP4224770A4/en active Pending
- 2021-10-12 KR KR1020237012554A patent/KR20230087489A/ko active Pending
- 2021-10-12 JP JP2023521779A patent/JP7847871B2/ja active Active
-
2023
- 2023-04-11 US US18/133,357 patent/US11832310B2/en active Active
- 2023-11-04 US US18/387,034 patent/US12245292B2/en active Active
- 2023-11-04 US US18/387,035 patent/US12245293B2/en active Active
-
2025
- 2025-02-01 US US19/043,423 patent/US20250254733A1/en active Pending
- 2025-07-11 JP JP2025117617A patent/JP2025148493A/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180317263A1 (en) * | 2017-04-28 | 2018-11-01 | Sharp Laboratories Of America, Inc, | Random access procedure(s) for radio system |
| KR20200027048A (ko) * | 2017-08-02 | 2020-03-11 | 삼성전자주식회사 | 스케줄링 정보를 수신하는 방법, 장치, 정보를 송신하는 단말기, 기지국 및 방법 |
| KR20200109354A (ko) * | 2018-02-16 | 2020-09-22 | 텔레호낙티에볼라게트 엘엠 에릭슨(피유비엘) | Msg3 송신을 위한 시간 자원 할당 시그널링 메커니즘 |
| US20200267764A1 (en) * | 2019-02-14 | 2020-08-20 | Nazanin Rastegardoost | Dynamic PRACH Scheduling using Slot Formats |
Non-Patent Citations (2)
| Title |
|---|
| SAMSUNG: "Corrections on Ultra Reliable Low Latency Communications Enhancements", 3GPP DRAFT; RP-201808, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20200817 - 20200828, 5 September 2020 (2020-09-05), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051930053 * |
| See also references of EP4224770A4 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11832310B2 (en) | 2020-10-11 | 2023-11-28 | Wilus Institute Of Standards And Technology Inc. | Method for transmitting uplink channel in wireless communication system and apparatus therefor |
| US12245293B2 (en) | 2020-10-11 | 2025-03-04 | Wilus Institute Of Standards And Technology Inc. | Method for transmitting uplink channel in wireless communication system and apparatus therefor |
| US12245292B2 (en) | 2020-10-11 | 2025-03-04 | Wilus Institute Of Standards And Technology Inc. | Method for transmitting uplink channel in wireless communication system and apparatus therefor |
| US20220248378A1 (en) * | 2021-02-02 | 2022-08-04 | Qualcomm Incorporated | Early termination of pusch transmission |
| US11601930B2 (en) * | 2021-02-02 | 2023-03-07 | Qualcomm Incorporated | Early termination of PUSCH transmission |
| JP2025519104A (ja) * | 2022-05-23 | 2025-06-24 | 北京小米移動軟件有限公司 | マルチprach伝送設定方法、装置 |
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| US11832310B2 (en) | 2023-11-28 |
| US20240147538A1 (en) | 2024-05-02 |
| EP4224770A1 (en) | 2023-08-09 |
| US12245293B2 (en) | 2025-03-04 |
| KR20230087489A (ko) | 2023-06-16 |
| JP2023545792A (ja) | 2023-10-31 |
| EP4224770A4 (en) | 2024-08-21 |
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| US20250254733A1 (en) | 2025-08-07 |
| US20230247680A1 (en) | 2023-08-03 |
| US20240073965A1 (en) | 2024-02-29 |
| US12245292B2 (en) | 2025-03-04 |
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