Terminal and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure is characterized by comprising: a control unit that determines whether a capability of a different processing time than that of an initial transmission of data is supported for retransmission, and, if supported, determines the capability of the processing time to be applied to the retransmission; and a transmitting and receiving unit that performs transmission or reception processing based on the determined capability of the processing time to be applied to the retransmission. According to one embodiment of the present disclosure, processing related to retransmission can be appropriately performed.

Description

Technical Field

[0001] The present disclosure relates to a terminal and a wireless communication method in a next-generation mobile communication system. Background Art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8 and 9).

[0003] Successor systems to LTE (for example, also referred to as fifth-generation mobile communication system (5G), 5G+ (plus), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also under study.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In Rel.15NR, the processing time of the downlink shared channel (Physical Downlink Shared Channel (PDSCH)) and the processing time of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) are defined. In Rel.15NR, this processing time is divided into two types: processing time for UE capability 1 (UE capability 1) and processing time for UE capability 2 (UE capability 2). The processing time for UE capability 2 is shorter than the processing time for UE capability 1.

[0009] In Rel.15 NR, a UE whose processing based on UE capability 2 is set to be valid basically determines the PDSCH / PUSCH processing time based on UE capability 2 as described above. On the other hand, in NRs after Rel.16, more flexible control is required.

[0010] Therefore, in Rel.16NR, research is underway to determine if a UE, which has been instructed by the network (base station) to perform processing based on UE capabilities 1 and 2, will process different PDSCHs (or different PUSCHs) based on different UE capabilities. However, in discussions about NR so far, only the application of different UE capabilities for initial transmissions has been discussed, and research has not yet been conducted on retransmissions. If the UE capabilities for retransmissions are not clearly defined, appropriate retransmission processing cannot be achieved, and there are concerns that communication throughput may deteriorate.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal and a wireless communication method that can appropriately perform processing related to retransmission.

[0012] Means for solving problems

[0013] The terminal involved in one embodiment of the present invention is characterized in that it has: a control unit that determines whether the application of the ability to process data at a different time than the initial transmission of the data is supported for retransmission, and if supported, determines the ability to process the data at a different time for retransmission; and a sending or receiving unit that performs sending or receiving processing based on the determined ability to process the data at a different time for retransmission.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, it is possible to appropriately perform processing related to retransmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a diagram showing an example of determination of processing time applied to data retransmission according to the second embodiment.

[0017] Figure 2 This is a diagram showing another example of determining the processing time applied to data retransmission according to the second embodiment.

[0018] Figure 3 This is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.

[0019] Figure 4 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0020] Figure 5 This is a diagram showing an example of the configuration of a user terminal according to one embodiment.

[0021] Figure 6 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. DETAILED DESCRIPTION

[0022] (Processing Time)

[0023] In Rel.15NR, the processing time of the downlink shared channel (Physical Downlink Shared Channel (PDSCH)) and the processing time of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) are defined. In addition, the processing time can also be replaced by preparation time, preparation procedure time, processing procedure time, etc.

[0024] The PDSCH processing time may also be equivalent to the period from the end of the last PDSCH symbol transmitting the transport block to an uplink (UL) symbol. The UE may also provide valid delivery confirmation information (e.g., Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)) using the same symbol as or a later symbol than the UL symbol.

[0025] The processing time of the PUSCH may also be equivalent to the period from the end of the last symbol of the downlink control channel (Physical Downlink Control Channel (PDCCH)) that transmits the downlink control information (DCI) that schedules the PUSCH to a certain UL symbol. The UE may also transmit the PUSCH using the same symbol as or a later symbol than the UL symbol.

[0026] The processing time of the PDSCH may also be determined based on a parameter N1 (also referred to as a PDSCH decoding time), and the processing time of the PUSCH may also be determined based on a parameter N2 (also referred to as a PUSCH preparation time).

[0027] N1 may also be determined based on the subcarrier spacing (SCS) of the downlink on which the PDSCH is transmitted and the SCS of the UL channel (e.g., PUCCH, PUSCH) on which the HARQ-ACK is transmitted. For example, N1 may be determined based on the smallest SCS among these SCSs, for example, when the smallest SCS is 15 kHz, it may be determined to be 8 symbols, such as 8-20 symbols. When an additional PDSCH DMRS is configured, N1 may also be determined to be 13-24 symbols.

[0028] N2 may also be determined based on the downlink SCS of the PDCCH transmitted and the SCS of the UL channel transmitting the PUSCH, where the PDCCH is used to transmit the DCI scheduling the PUSCH. For example, N2 may be determined based on the smallest SCS among these SCSs. For example, when the smallest SCS is 15 kHz, N2 may be determined to be 10 symbols or 10-36 symbols.

[0029] That is, the above-mentioned processing time (and parameters related to the processing time (N1, N2, etc.)) can also follow the values ​​specified according to the parameter set corresponding to the minimum SCS in PDCCH / PDSCH and PUCCH / PUSCH.

[0030] When using PUSCH to send HARQ-ACK corresponding to PDSCH, the UE can also send PUSCH through the UL codeword or the codeword after it passes through the time (total time) obtained from the end of the last codeword of the PDSCH, which is the sum of the processing time of the above-mentioned PDSCH and the processing time of the above-mentioned PUSCH.

[0031] In Rel. 15 NR, the processing time is divided into two types: processing time for UE capability 1 and processing time for UE capability 2. The processing time for UE capability 2 is shorter than the processing time for UE capability 1.

[0032] The UE can use different UE capability information for PDSCH and PUSCH respectively (for example, the RRC parameter "pdsch-ProcessingType2" for the former and the RRC parameter "pusch-ProcessingType2" for the latter) to report to the network (for example, the base station) whether it supports UE capability 2. UE capability X for PDSCH (or PUSCH) can also be referred to as PDSCH (or PUSCH) processing capability X.

[0033] The base station may also determine, based on the UE capability information, whether the UE performs processing based on UE capability 2. For each of PDSCH and PUSCH, the base station may also use higher-layer signaling to set information indicating the application (enabling) of UE capability 2 to the UE (for example, the former is the parameter "processingType2Enabled" contained in the RRC information element "PDSCH-ServingCellConfig", and the latter is the parameter "processingType2Enabled" contained in the RRC information element "PUSCH-ServingCellConfig"). In addition, the former parameter may also be referred to as "Capability2-PDSCH-Processing", and the latter parameter may also be referred to as "Capability2-PUSCH-Processing".

[0034] In addition, in the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0035] MAC signaling may utilize, for example, MAC Control Element (MAC CE) and MAC Protocol Data Unit (PDU). Broadcast information may include, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and Other System Information (OSI).

[0036] In addition, even if the UE supports UE capability 2 and the base station sets the application of UE capability 2, under certain conditions, the UE falls back to UE capability 1. For example, for PDSCH, when the subcarrier spacing is 30 kHz (parameter μ related to the parameter set = 1) and the number of scheduled resource blocks exceeds 136, the UE processes the PDSCH based on the processing time of UE capability 1.

[0037] On the other hand, the existing Rel.15NR specification does not define the conditions for falling back to UE capability 1 for PUSCH.

[0038] In Rel.15 NR, a UE whose processing based on UE capability 2 is set to be valid basically determines the PDSCH / PUSCH processing time based on UE capability 2 as described above. On the other hand, in NRs after Rel.16, more flexible control is required.

[0039] For example, in Rel. 16NR, the introduction of out-of-order (OOO) processing is under study. OOO processing is equivalent to starting and completing a second process after starting a first process but before completing it (a situation where the order of starting and completing the processes is reversed). The first process, second process, etc. can also be equivalent to receiving a certain signal or channel (also referred to as signal / channel) and transmitting or receiving another signal / channel corresponding to the signal / channel.

[0040] When multiple services (also referred to as use cases, communication types, etc.) with different request conditions are used, the necessity of OOO processing becomes higher. Research is underway on NR use cases such as high speed and large capacity (e.g., enhanced Mobile Broadband (eMBB)), large numbers of terminals (e.g., massive Machine Type Communication (mMTC)), and ultra-high reliability and low latency (e.g., Ultra Reliable and Low Latency Communications (URLLC)).

[0041] For example, it is envisaged that OOO processing is performed to squeeze the more important URLLC data into the eMBB data.

[0042] Therefore, in Rel.16NR, research is underway to allow UEs that have been configured by the network (base station) to perform processing based on UE capabilities 1 and 2 to process different PDSCHs (or different PUSCHs) based on different UE capabilities. However, in the NR discussions so far, only the application of different UE capabilities for initial transmission has been discussed, and research has not yet been conducted on retransmissions. If the UE capabilities during retransmissions are not clearly defined, appropriate retransmission processing cannot be achieved, and there are concerns that communication throughput will deteriorate.

[0043] Therefore, the inventors of the present invention have conceived a method for appropriately performing retransmission processing.

[0044] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the various embodiments may be applied individually or in combination.

[0045] Hereinafter, the UE capability related to processing time is also simply referred to as processing time capability. In the following embodiments, the processing time capability is not limited to the existing UE capabilities 1 and 2.

[0046] For example, the processing time for UE capability 3 may be defined as shorter than the processing time for UE capability 2. For example, when compared with the same SCS, parameter N1 for PDSCH processing capability 3 may be shorter than parameter N1 for PDSCH processing capability 2. Furthermore, the UE capability X (X is an integer) in the present disclosure may be interchangeable with the UE capability X related to processing time.

[0047] In addition, in the present disclosure, the term "data" may be replaced with "at least one of the PDSCH and the PUSCH." Furthermore, the term "data" in the present disclosure may be replaced with a transport block (TB), code block (CB), code block group (CBG), or segment related to at least one of the PDSCH and the PUSCH.

[0048] In addition, in the following embodiments, the case where the UE initially transmits (initial transmission) and retransmits data is mainly described. However, even in the case where the UE receives data that is initially transmitted or retransmitted, those skilled in the art can easily understand that the present disclosure supports the implementation of appropriately replacing "sending (or transmitting) (data)" with "receiving (or receiving) (data)", appropriately replacing "initial transmission (or initial transmission)" with "receiving initial transmission (or receiving initial transmission)", and appropriately replacing "retransmitting (or retransmitting)" with "receiving retransmission (or receiving retransmission)".

[0049] (Wireless Communication Method)

[0050] <First embodiment>

[0051] The first embodiment is related to whether the UE supports a capability of processing different time for data retransmission than for initial transmission of the data. This capability may also be referred to as the capability of processing different time for data retransmission.

[0052] In addition, how a UE supporting the capability of different processing times for data retransmission applies the capability of different processing times in initial transmission and retransmission will be described later in the second embodiment.

[0053] The UE may also consider any of the following applications for different processing time capabilities related to data retransmission:

[0054] (1-1) Only retransmissions applying a higher capability than that applied to the initial transmission are supported;

[0055] (1-2) Only retransmissions applying a lower capability than that applied to the initial transmission are supported;

[0056] (1-3) Support both (1-1) and (1-2) above;

[0057] (1-4) does not support both (1-1) and (1-2).

[0058] Here, higher capability may mean capability with shorter processing time or capability with a larger index (for example, the index of UE capability 2 is larger than the index of UE capability 1) of processing time.

[0059] A UE complying with (1-1) above may retransmit the same data based on UE capability 2 when initial transmission based on UE capability 1 fails (for example, transmission fails due to a higher priority transmission).

[0060] A UE that complies with the above (1-1) may also retransmit the same data based on the same UE capability 2 (or, if available, a higher UE capability 3) if the initial transmission based on UE capability 2 fails.

[0061] A UE complying with (1-2) above may retransmit the same data based on UE capability 1 when initial transmission based on UE capability 2 fails (for example, transmission fails due to insufficient processing time).

[0062] A UE complying with (1-2) above may retransmit the same data based on the same UE capability 1 (or, if available, a lower UE capability X) if the initial transmission based on UE capability 1 fails.

[0063] A UE following the above (1-3) may also resend the same data based on UE capability 1 or 2 (or, if available, higher UE capability 3 or lower UE capability X) if the initial transmission based on UE capability 1 fails.

[0064] A UE following the above (1-3) may also resend the same data based on UE capability 1 or 2 (or, if available, higher UE capability 3 or lower UE capability X) if the initial transmission based on UE capability 2 fails.

[0065] A UE that complies with (1-4) above may also be considered to not support the application of capabilities with different processing times related to data retransmission. The UE may also apply only the same processing time capabilities for data retransmission as for the initial transmission of the data. If the initial transmission based on UE capability 1 fails, the UE may retransmit the same data based on the same UE capability 1. If the initial transmission based on UE capability 2 fails, the UE may retransmit the same data based on the same UE capability 2.

[0066] In addition, which of (1-1) to (1-4) the UE uses can be predetermined by the specification, determined based on the supported (or reported) specific UE capabilities, or configured for the UE through higher layer signaling.

[0067] According to the first embodiment described above, it is possible to appropriately control the application of the capability of the UE to support a processing time different from that of the initial transmission for retransmission.

[0068] <Second embodiment>

[0069] The second embodiment relates to the capabilities of the processing time applied to data retransmission (in other words, envisaged or utilized in the process of retransmission).

[0070] A UE that supports different processing time capabilities related to retransmission may also determine the processing time capability to be applied to retransmission based on at least one of the following:

[0071] (2-1) Fields included in the DCI for scheduling retransmission,

[0072] (2-2) DCI format for scheduling retransmission,

[0073] (2-3) Receive the control resource set (CORESET) of the DCI for scheduling retransmission,

[0074] (2-4) Receiving the Search Space (SS) for DCI used to schedule retransmission,

[0075] (2-5) Radio Network Temporary Identifier (RNTI) related to DCI used to schedule retransmission,

[0076] (2-6) High-level parameters related to the processing time applied to data retransmission,

[0077] (2-7) Parameters related to the scheduling of initial transmission or retransmission (for example, the time length of the data (duration, such as the number of code elements), the size of the data (for example, TB size, CB size, etc.), the purpose of the data (for example, URLLC-oriented, eMBB-oriented, etc.)).

[0078] For example, with respect to (2-1) above, when the UE receives DCI indicating the retransmission of previously scheduled data (for example, when the UE receives DCI including the same New Data Indicator (NDI) value or the same HARQ Process Number (HPN) field value as that of previously scheduled data), and the DCI includes a field indicating the utilization of UE capability X, the UE may retransmit the data based on the UE capability X. Even if the DCI does not include a field indicating the utilization of UE capability X, the data may be retransmitted based on the same UE capability as that used in the initial transmission.

[0079] In addition, the DCI for instructing retransmission may also include a field indicating the use of UE capabilities that are higher (or lower or the same) than the UE capabilities applied to the initial transmission. If the UE is instructed to use higher UE capabilities based on the value of this field, the UE may also apply UE capabilities with a higher index than the UE capabilities applied to the initial transmission to the retransmission.

[0080] Regarding (2-2) above, when a UE receives DCI format 0_x or 1_x indicating the retransmission of previously scheduled data, and the DCI format indicating the initial transmission of the data is DCI format 0_y or 1_y, the UE may apply UE capabilities different from those applied to the initial transmission to the retransmission. In other words, when the DCI formats used for scheduling in the retransmission and the initial transmission are different, the UE may apply UE capabilities different from those applied to the initial transmission to the retransmission.

[0081] For example, DCI format 0_x or 1_x may correspond to a DCI format for a specific use case (e.g., URLLC), and may also be referred to as DCI format 0_2 or 1_2. DCI format 0_y or 1_y may also be a DCI format for another use case (e.g., eMBB), and may have y = 0 or y = 1.

[0082] In addition, when receiving DCI format 0_x or 1_x for indicating retransmission of previously scheduled data, the UE may apply UE capabilities different from those applied to the initial transmission to the retransmission regardless of the DCI format indicating the initial transmission of the data.

[0083] Figure 1 This is a diagram showing an example of determining the processing time applied to data retransmission according to the second embodiment. In this example, the case of x=2 and y=1 described above is assumed.

[0084] The UE was scheduled for an initial data transmission using DCI format 0_1. The UE applied UE capabilities 1 to the initial transmission, but the transmission failed. The UE was then scheduled for a retransmission of the same data using DCI format 0_2. In this case, the UE can also apply UE capabilities 2, which differ from UE capabilities 1 applied to the initial transmission, to the retransmission.

[0085] With respect to (2-3) and (2-4) above, the UE may also assume that PDCCHs for different usage scenarios (requests for different services) are scheduled in different CORESETs or different search spaces.

[0086] Regarding the above (2-3) and (2-4), when CORESET#n or SS#n receives DCI for indicating the retransmission of data that was scheduled in the past and the DCI indicating the initial transmission of the data is the DCI received at CORESET#m or SS#m, the UE may also apply UE capabilities different from the UE capabilities applied to the initial transmission to the retransmission.

[0087] In addition, CORESET#n or SS#n may be expressed as a CORESET or SS for low delay (or for URLLC), and CORESET#m or SS#m may be expressed as a CORESET or SS not for low delay (or not for URLLC).

[0088] Figure 2 This is a diagram showing another example of determining the processing time applied to data retransmission according to the second embodiment. In this example, the case of n=2 and m=1 described above is assumed.

[0089] The UE receives DCI instructing the initial transmission of data at CORESET #1 or SS #1. The UE applies UE Capabilities 1 to the initial transmission and processes it, but the transmission fails. The UE then receives DCI instructing the retransmission of the data at CORESET #2 or SS #2. In this case, the UE may apply UE Capabilities 2, which differ from UE Capabilities 1 applied to the initial transmission, to the retransmission.

[0090] Regarding the above (2-5), when the DCI used to indicate the retransmission of data scheduled in the past has a cyclic redundancy check (CRC) bit that is scrambled by a specific RNTI (for example, the RNTI for URLLC, the Modulation and Coding Scheme CellRNTI (MCS-C-RNTI)), the UE may also apply UE capabilities different from the UE capabilities applied to the initial transmission to the retransmission.

[0091] With respect to (2-6) above, the UE may also be configured with information about UE capabilities to be applied to retransmissions through higher-layer signaling. Furthermore, if the information about UE capabilities to be applied to retransmissions indicates the same UE capabilities as those for initial transmissions, or if the information about UE capabilities to be applied to retransmissions is not configured (the RRC parameter indicating such information is absent), the UE may also apply the same UE capabilities to retransmissions as those for initial transmissions.

[0092] Regarding the above (2-7), when the number of code elements used for data retransmission (the length of the time resources used for data retransmission) is above (or less than) a certain threshold, the UE may also apply UE capabilities different from those applied to the initial transmission to the retransmission.

[0093] Regarding the above (2-7), when the size of the data to be retransmitted is greater than (or less than) a certain threshold, the UE may apply UE capabilities different from those applied to the initial transmission to the retransmission.

[0094] In addition, the correspondence between the elements represented by (2-1) to (2-7) (e.g., field values, formats, CORESETs, parameter values) and the capabilities of the processing time applied to retransmissions may be predetermined by the specification or configured for the UE through higher-layer signaling. Furthermore, the aforementioned x, y, m, n, thresholds, etc. may be predetermined by the specification or configured for the UE through higher-layer signaling.

[0095] In addition, it is also conceivable that a UE capable of applying multiple UE capabilities to data transmission and retransmission may not follow the above (2-1) to (2-7), but may always apply UE capabilities different from those applied to initial transmission to retransmission.

[0096] Alternatively, the UE may assume that the processing time capability applied to the initial transmission is the lowest capability among the supported capabilities (e.g., UE capability 1), or may decide to apply any capability based on conditions. The UE capability applied to the retransmission, which is different from the initial transmission, may be a higher or lower UE capability than the UE capability applied to the initial transmission.

[0097] According to the second embodiment described above, the UE can appropriately determine the capability of the processing time applied to retransmission.

[0098] (Wireless Communication System)

[0099] The following describes the configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.

[0100] Figure 3 This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP) or the fifth generation mobile communication system New Radio (5G NR).

[0101] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0102] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0103] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both the MN and the SN are NR base stations (gNB)).

[0104] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The arrangement and number of cells and user terminals 20 are not limited to those shown. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0105] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0106] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may be equivalent to a frequency band higher than FR2.

[0107] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0108] Multiple base stations 10 can also be connected by wired (for example, optical fiber compliant with the Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (for example, NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station can also be called an integrated access backhaul (IAB) host, and the base station 12 equivalent to the relay station (relay) can also be called an IAB node.

[0109] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0110] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0111] In the wireless communication system 1, a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0112] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0113] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0114] In addition, as uplink channels, the wireless communication system 1 can also use an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc.

[0115] User data, higher-layer control information, and system information blocks (SIBs) are transmitted via the PDSCH. User data, higher-layer control information, and the like can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0116] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may also include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0117] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, PDSCH may also be replaced by DL data, and PUSCH may also be replaced by UL data.

[0118] PDCCH detection can also utilize a control resource set (CORESET) and a search space. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. Based on the search space settings, the UE can also monitor the CORESET associated with a search space.

[0119] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. Furthermore, the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in this disclosure may be used interchangeably.

[0120] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted via the PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted via the PRACH.

[0121] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Furthermore, various channels may be expressed without adding "Physical" at the beginning.

[0122] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0123] A synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as an SS / PBCH block, SS Block (SSB), etc. Furthermore, SS and SSB may also be referred to as reference signals.

[0124] In addition, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may also be transmitted as an uplink reference signal (UL-RS). In addition, DMRS may also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0125] (Base Station)

[0126] Figure 4 This figure shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission line interface 140. Furthermore, more than one of each of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission line interface 140 may be provided.

[0127] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, but it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0128] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0129] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission, reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antennas 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting up, releasing, etc.) of communication channels, manage the status of the base station 10, manage radio resources, etc.

[0130] The transceiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0131] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0132] The transmitting and receiving antenna 130 can be formed of an antenna described based on common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0133] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0134] The transmitting and receiving unit 120 may also form at least one of a transmitting beam and a receiving beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0135] The sending and receiving unit 120 (sending processing unit 1211) can also perform processing on the data and control information obtained from the control unit 110, such as the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (for example, RLC retransmission control), and the Medium Access Control (MAC) layer (for example, HARQ retransmission control), to generate a bit string to be sent.

[0136] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0137] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0138] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 130 .

[0139] The transmitting and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT)) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0140] The transmitting and receiving unit 120 (measuring unit 123) may also perform measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0141] The transmission path interface 140 may also transmit and receive signals (backhaul signaling) between devices included in the core network 30 , other base stations 10 , etc., and obtain and transmit user data (user plane data) and control plane data for the user terminal 20 .

[0142] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0143] Furthermore, for retransmission of data (e.g., PDSCH, PUSCH), the transmitting / receiving unit 120 may transmit information indicating application of processing time capabilities different from that for initial transmission of the data to the user terminal 20 using higher layer signaling, physical layer signaling, or a combination thereof.

[0144] (User Terminal)

[0145] Figure 5 This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided in one or more units.

[0146] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and the user terminal 20 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0147] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0148] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmitting and receiving unit 220 and the transmitting and receiving antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmitting and receiving unit 220.

[0149] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0150] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0151] The transmitting and receiving antenna 230 can be formed of an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0152] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0153] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0154] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 210 to generate a bit string to be sent.

[0155] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output the baseband signal.

[0156] In addition, whether or not to apply DFT processing may also be based on the transform precoding setting. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transmitting / receiving unit 220 (transmitting processing unit 2211) may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, DFT processing is not performed as the above-mentioned transmission processing.

[0157] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0158] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0159] The transmitting and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0160] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signals. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0161] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0162] In addition, the control unit 210 can also determine whether to support the application of a processing time capability different from the initial transmission of data (e.g., PDSCH, PUSCH) for retransmission of the data, and if supported, determine the processing time capability applied to the retransmission.

[0163] The transmitting and receiving unit 220 may also perform transmission or reception processing based on the determined processing time capability applicable to the retransmission.

[0164] The control unit 210 may also determine to support only retransmissions applying a higher capability than that applied to the initial transmission, or retransmissions applying a lower capability than that applied to the initial transmission, or both.

[0165] The control unit 210 may also determine the processing time capability applied to the retransmission based on the format of the downlink control information used to schedule the retransmission.

[0166] The control unit 210 may also determine a capability of the processing time applied to the retransmission based on a control resource set or a search space for receiving downlink control information for scheduling the retransmission.

[0167] In the case of an application that does not support a processing time capability different from that of the initial transmission, the control unit 210 may determine that the processing time capability applied to the retransmission is the same as that applied to the initial transmission.

[0168] (Hardware Structure)

[0169] In addition, the block diagrams used for the description of the above-mentioned embodiments represent blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, using wired, wireless, etc.) connected and implemented using these multiple devices. The functional block can also be implemented by combining software for the above-mentioned one device or the above-mentioned multiple devices.

[0170] Here, the term "function" includes, but is not limited to, judging, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, considering, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that performs a transmitting function may also be referred to as a transmitting unit, a transmitter, or the like. As described above, the implementation method is not particularly limited.

[0171] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 6 This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above may also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0172] In addition, in this disclosure, the terms "apparatus," "circuit," "device," "section," and "unit" are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the illustrated devices, or may exclude some of the devices.

[0173] For example, only one processor 1001 is shown, but multiple processors may be provided. Furthermore, a process may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, the processor 1001 may be implemented using one or more chips.

[0174] The various functions in the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations, controls the communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0175] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be configured as a central processing unit (CPU) including interfaces with peripheral devices, a control device, a computing device, registers, and the like. For example, at least a portion of the aforementioned control unit 110 (210) and the transceiver unit 120 (220) may also be implemented by the processor 1001.

[0176] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and performs various processes according to the program. As a program, a program that causes the computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and the same can be achieved for other functional blocks.

[0177] The memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program code), software modules, etc. for implementing the wireless communication method according to an embodiment of the present disclosure.

[0178] The storage 1003 is a computer-readable recording medium and may be composed of, for example, at least one of a flexible disk, a floppy disk, an optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0179] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. To implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also implement physical or logical separation of the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0180] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrated (e.g., a touch panel).

[0181] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or different buses between the devices.

[0182] Furthermore, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and may use such hardware to implement part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware components.

[0183] (Variation)

[0184] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, channel, code element, and signal (signal or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal (RS) may also be referred to as a reference signal, or may be referred to as a pilot signal, a pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0185] A radio frame can also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (for example, 1ms) that is independent of the parameter set (numerology).

[0186] Here, a parameter set (numerology) may also be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. For example, a parameter set (numerology) may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0187] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0188] A time slot may also contain multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as PDSCH (PUSCH) mapping type B.

[0189] Radio frames, subframes, time slots, mini-slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-slots, and symbols may also be referred to by their respective names. Furthermore, the terms frame, subframe, time slot, mini-slot, and symbol may be used interchangeably in this disclosure.

[0190] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. In other words, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI can also be called a time slot, a mini-time slot, etc. instead of a subframe.

[0191] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the available frequency bandwidth and transmit power) in TTI units. The definition of TTI is not limited to this.

[0192] The TTI can be a unit of time for transmitting data packets (transport blocks), code blocks, code words, etc. after channel coding, and can also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

[0193] Furthermore, while one time slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-slots) can also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini-slots) that constitute this minimum time unit for scheduling can also be controlled.

[0194] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0195] In addition, long TTI (for example, normal TTI, subframe, etc.) can also be replaced by TTI with a time length exceeding 1ms, and short TTI (for example, shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than long TTI and longer than 1ms.

[0196] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may include one or more consecutive subcarriers (subcarriers). The number of subcarriers included in an RB may be the same regardless of the numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on the numerology.

[0197] Furthermore, in the time domain, an RB may also include one or more symbols, and may be the length of one slot, one mini-slot, one subframe, or one TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0198] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0199] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0200] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a numerology within a carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined within a BWP and assigned a sequence number within that BWP.

[0201] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0202] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside of the activated BWP. In addition, "cell", "carrier", etc. in this disclosure may also be replaced with "BWP".

[0203] The structures of radio frames, subframes, slots, mini-slots, and symbols described above are merely examples. For example, various modifications may be made to the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0204] In addition, the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0205] The names used for parameters, etc. in this disclosure are not intended to be limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore the names assigned to these channels and information elements are not intended to be limiting in any way.

[0206] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0207] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0208] Input and output information, signals, etc. can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. can be overwritten, updated, or appended. Output information, signals, etc. can also be deleted. Input information, signals, etc. can also be sent to other devices.

[0209] The notification of information is not limited to the methods / implementations described in the present disclosure, and other methods may also be used. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (downlink control information: Downlink Control Information (DCI)), uplink control information (uplink control information: UplinkControl Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0210] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as RRC message, for example, RRC Connection Setup message, RRC Connection Reconfiguration message, etc. In addition, MAC signaling may also be notified using MAC Control Element (CE), for example.

[0211] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0212] The judgment can be made by a value represented by 1 bit (0 or 1), a true or false value (Boolean value) represented by true (true) or false (false), or by comparing numerical values ​​(for example, comparison with a specific value).

[0213] Whether software is referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, it shall be interpreted broadly to mean instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or the like.

[0214] In addition, software, instructions, information, etc. may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired technologies and wireless technologies is included in the definition of a transmission medium.

[0215] The terms "system" and "network" used in this disclosure are interchangeable. "Network" may also refer to devices included in the network (eg, base stations).

[0216] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)" "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0217] In this disclosure, terms such as “base station (BS)”, “wireless base station”, “fixed station”, “NodeB”, “eNB (eNodeB)”, “gNB (gNodeB)”, “access point”, “transmission point (TP)”, “reception point (RP)”, “transmission / reception point (TRP))”, “panel”, “cell”, “sector”, “cell group”, “carrier”, and “component carrier” are used interchangeably. A base station is also sometimes referred to as a macro cell, a small cell, a femto cell, or a pico cell.

[0218] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also be provided with communication services by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or the entire coverage area of ​​at least one of the base station and base station subsystem that provide communication services within the coverage area.

[0219] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0220] A mobile station is also sometimes referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or some other appropriate terminology.

[0221] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Furthermore, at least one of the base station and the mobile station may also be a device mounted on a mobile object, the mobile object itself, etc. The mobile object may be a vehicle (e.g., a car, an airplane, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0222] In addition, the base station in the present disclosure can also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure can also be applied to a structure in which the communication between a base station and a user terminal is replaced by communication between multiple user terminals (for example, which can also be called device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the user terminal 20 has the functions of the above-mentioned base station 10. In addition, the language such as "uplink" and "downlink" can also be replaced by the language corresponding to the communication between terminals (for example, "side"). For example, the uplink channel, downlink channel, etc. can also be replaced by the side channel.

[0223] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0224] In this disclosure, operations performed by a base station may also be performed by its upper node depending on the situation. In a network including one or more network nodes including a base station, various operations performed for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW), but not limited thereto), or a combination thereof.

[0225] The various methods / implementations described in this disclosure may be used individually, in combination, or switched as they are executed. Furthermore, the processing procedures, sequence, flow charts, and the like of the various methods / implementations described in this disclosure may be swapped in order, as long as there is no conflict. For example, the methods described in this disclosure use an illustrative order to present various step elements, and are not limited to the specific order presented.

[0226] The various modes and embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.18 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (WiMAX (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (WiMAX (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 8 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems utilizing other appropriate wireless communication methods, and next-generation systems based on these. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A with 5G) may also be used.

[0227] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise explicitly stated. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0228] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily define the quantity or order of these elements. These designations can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and a second element does not imply that only two elements can be used or that the first element must precede the second element in some form.

[0229] As used in this disclosure, the term "determining" sometimes encompasses a variety of operations. For example, "determining" can also be considered as "judging," calculating, computing, processing, deriving, investigating, searching (e.g., searching a table, database, or other data structure), ascertaining, etc.

[0230] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc.

[0231] Furthermore, “judgment (decision)” can also be seen as “judgment (decision)” on resolving, selecting, choosing, establishing, comparing, etc. In other words, “judgment (decision)” can also be seen as “judgment (decision)” on certain operations.

[0232] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)”, etc.

[0233] The "maximum transmit power" recorded in this disclosure may mean the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0234] As used in this disclosure, the terms "connected," "coupled," and any variations thereof mean any direct or indirect connection or coupling between two or more elements, including the presence of one or more intermediate elements between the two "connected" or "coupled" elements. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be replaced by "connected."

[0235] In the present disclosure, when connecting two elements, it can be considered that one or more wires, cables, printed electrical connections, etc. are used to be "connected" or "combined" with each other, and as some non-limiting and non-inclusive examples, electromagnetic energy with wavelengths in the wireless frequency domain, microwave domain, light (visible light and invisible light) domain, etc. are used to be "connected" or "combined" with each other.

[0236] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same way as "different."

[0237] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," are inclusive. Furthermore, the term "or" used in this disclosure does not mean exclusive or.

[0238] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include the case where the noun following the article is in a plural form.

[0239] While the invention disclosed herein has been described in detail above, it will be apparent to those skilled in the art that the invention disclosed herein is not limited to the embodiments described herein. The invention disclosed herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description herein is for illustrative purposes only and is not intended to limit the invention disclosed herein in any way.

Claims

1. A terminal, characterized in that: have: a control unit that determines, for retransmission of data, whether application of a capability for a different processing time than that for initial transmission of the data is supported, and, if supported, determines a capability for the processing time to be applied to the retransmission; as well as The transmitting and receiving unit performs a transmitting or receiving process based on the determined processing time applied to the retransmission, The control unit determines to support only retransmissions applying a higher capability than that applied to the initial transmission, The transmitting and receiving unit performs the retransmission or reception process when the data cannot be transmitted due to a higher priority transmission occurring in the initial transmission. The code blocks associated with the retransmitted data are the same as the code blocks in the initial transmission.

2. The terminal according to claim 1, wherein The control unit determines a capability of a processing time applied to the retransmission based on a format of downlink control information for scheduling the retransmission.

3. The terminal according to claim 1, wherein The control unit determines a capability of processing time applied to the retransmission based on a control resource set or a search space for receiving downlink control information for scheduling the retransmission.

4. The terminal according to any one of claims 1 to 3, characterized in that: In the case of an application that does not support a processing time capability different from that of the initial transmission, the control unit determines that the processing time capability applied to the retransmission is the same as the capability applied to the initial transmission.

5. A wireless communication method, used for a terminal, characterized in that: The wireless communication method comprises: The step of determining, for retransmission of data, whether application of a capability for a different processing time than that for initial transmission of the data is supported, and if supported, determining a capability for the processing time to be applied to the retransmission; The step of performing a sending or receiving process based on the determined processing time capability applied to the retransmission; as well as the step of determining to support only retransmissions applying a higher capability than that applied to the initial transmission, When the data cannot be transmitted due to a higher priority transmission in the initial transmission, the retransmission or reception process is performed. The code blocks associated with the retransmitted data are the same as the code blocks in the initial transmission.

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