WO2022039155A1 - Terminal, procédé de communication sans fil et station de base - Google Patents

Terminal, procédé de communication sans fil et station de base Download PDF

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Publication number
WO2022039155A1
WO2022039155A1 PCT/JP2021/030022 JP2021030022W WO2022039155A1 WO 2022039155 A1 WO2022039155 A1 WO 2022039155A1 JP 2021030022 W JP2021030022 W JP 2021030022W WO 2022039155 A1 WO2022039155 A1 WO 2022039155A1
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Prior art keywords
harq
ack
pdsch
transmission
priority
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PCT/JP2021/030022
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English (en)
Japanese (ja)
Inventor
優元 ▲高▼橋
慎也 熊谷
聡 永田
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株式会社Ｎｔｔドコモ
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Publication of WO2022039155A1 publication Critical patent/WO2022039155A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • This disclosure relates to terminals, wireless communication methods and base stations in next-generation mobile communication systems.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • 3GPP Rel.10-14 LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
  • a successor system to LTE for example, 5th generation mobile communication system (5G), 5G + (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 or later, etc.
  • 5G 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • NR New Radio
  • HARQ-ACK Hybrid Automatic Repeat reQuest ACKnowledgement
  • URLLC Ultra-Reliable and Low-Latency Communications
  • one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of appropriately controlling the transmission of HARQ-ACK corresponding to different traffic types.
  • the first traffic type having the first priority and the second traffic type having the second priority lower than the first priority are different physical downlinks.
  • a receiver that receives information indicating that it is not grouped into a link shared channel (PDSCH) group by higher layer signaling, and a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-) corresponding to the second traffic type based on the information. It is characterized by having a control unit that controls at least one of transmission and retransmission of ACK).
  • PDSCH link shared channel
  • HARQ- Hybrid Automatic Repeat reQuest ACKnowledgement
  • FIG. 1 is a diagram showing an example of an enhanced dynamic HARQ feedback method.
  • FIG. 2 is a diagram showing an example of holding and resetting HARQ-ACK information by NFI.
  • FIG. 3 is a diagram showing another example of holding and resetting HARQ-ACK information by NFI.
  • FIG. 4 is a diagram showing another example of holding and resetting HARQ-ACK information by NFI.
  • 5A and 5B are diagrams showing an example of the relationship between the setting of the upper layer parameter indicating the presence / absence of PDSCH grouping for a plurality of traffic types and the number of bits of the field for enhanced dynamic HARQ-ACK feedback.
  • FIG. 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 7 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • FIG. 8 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • FIG. 9 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • the traffic type may be identified at the physical layer based on at least one of the following: -Logical channels with different priorities-Modulation and Coding Scheme (MCS) table (MCS index table) -Channel Quality Indication (CQI) table-DCI format-Used for scramble (mask) of Cyclic Redundancy Check (CRC) bits included (added) in the DCI (DCI format).
  • MCS Modulation and Coding Scheme
  • CQI Channel Quality Indication
  • CRC Cyclic Redundancy Check
  • the HARQ-ACK (or PUCCH) traffic type for PDSCH may be determined based on at least one of the following: An MCS index table (eg, MCS index table 3) used to determine at least one of the PDSCH modulation order, target code rate, and transport block size (TBS).
  • An MCS index table eg, MCS index table 3
  • TBS transport block size
  • RNTI used for CRC scrambling of DCI used for scheduling the PDSCH (for example, whether CRC scrambled by C-RNTI or MCS-C-RNTI).
  • the traffic type may be associated with communication requirements (requirements such as delay and error rate, requirement conditions), data type (voice, data, etc.) and the like.
  • the difference between the URLLC requirement and the eMBB requirement may be that the URLLC latency is smaller than the eMBB delay, or the URLLC requirement may include a reliability requirement.
  • the eMBB user (U) plane delay requirement may include that the downlink U-plane delay is 4 ms and the uplink U-plane delay is 4 ms.
  • the URLLC U-plane delay requirement may include that the downlink U-plane delay is 0.5 ms and the uplink U-plane delay is 0.5 ms.
  • the reliability requirement of URLLC may also include a 32-byte error rate of 10-5 at a U-plane delay of 1 ms.
  • NR Rel.
  • NR after 16 it is considered to set a plurality of levels (for example, 2 levels) of priority for a predetermined signal or channel.
  • communication control for example, transmission control in the event of a collision
  • communication control is performed by setting different priorities for each signal or channel corresponding to different traffic types (also referred to as service, service type, communication type, use case, etc.). It is supposed to be done. This makes it possible to control communication by setting different priorities for the same signal or channel according to the service type and the like.
  • the priority may be set for a signal (for example, UCI such as HARQ-ACK, a reference signal, etc.), a channel (PDSCH, PUSCH, etc.), a HARQ-ACK codebook, or the like.
  • the priority may be defined by a first priority (for example, High) and a second priority (for example, Low) having a lower priority than the first priority.
  • a first priority for example, High
  • a second priority for example, Low
  • three or more types of priorities may be set.
  • Information about the priority may be notified from the base station to the UE using at least one of higher layer signaling and DCI.
  • priorities may be set for the dynamically scheduled HARQ-ACK for PDSCH, HARQ-ACK for semi-persistent PDSCH (SPS PDSCH), and HARQ-ACK for SPS PDSCH release.
  • a priority may be set for the HARQ-ACK codebook corresponding to these HARQ-ACKs.
  • the priority of the PDSCH may be read as the priority of HARQ-ACK for the PDSCH.
  • the UE may control UL transmission based on priority when different UL signals / UL channels collide. For example, UL transmission having a high priority may be performed, and UL transmission having a low priority may not be performed (for example, dropping). Alternatively, the transmission timing of the UL transmission having a low priority may be changed (for example, postponed or shifted).
  • Collision of different UL signals / UL channels means that the time resources (or time resources and frequency resources) of different UL signals / UL channels overlap, or the transmission timings of different UL signals / UL channels overlap. May be.
  • the base station uses higher layer signaling to determine whether or not a bit field (for example, Priority indicator) for notifying the priority is set to the DCI. Notifications or settings may be made. Further, when the UE does not include a bit field for notifying the DCI of the priority, the priority of the PDSCH (or HARQ-ACK corresponding to the PDSCH) scheduled in the DCI is a specific priority (for example, the priority). It may be judged as low).
  • a bit field for example, Priority indicator
  • NR Priority setting
  • a plurality of levels for example, 2 levels
  • communication control for example, transmission control in the event of a collision
  • communication control is performed by setting different priorities for each signal or channel corresponding to different traffic types (also referred to as service, service type, communication type, use case, etc.). It is supposed to be done. This makes it possible to control communication by setting different priorities for the same signal or channel according to the service type and the like.
  • the priority may be set for a signal (for example, UCI such as HARQ-ACK, a reference signal, etc.), a channel (PDSCH, PUSCH, etc.), a HARQ-ACK codebook, or the like.
  • the priority may be defined by a first priority (for example, High) and a second priority (for example, Low) having a lower priority than the first priority.
  • a first priority for example, High
  • a second priority for example, Low
  • three or more types of priorities may be set.
  • Information about the priority may be notified from the base station to the UE using at least one of higher layer signaling and DCI.
  • priorities may be set for the dynamically scheduled HARQ-ACK for PDSCH, HARQ-ACK for semi-persistent PDSCH (SPS PDSCH), and HARQ-ACK for SPS PDSCH release.
  • a priority may be set for the HARQ-ACK codebook corresponding to these HARQ-ACKs.
  • the priority of the PDSCH may be read as the priority of HARQ-ACK for the PDSCH.
  • the priority may be set for the dynamic grant-based PUSCH, the setting grant-based PUSCH, and the like.
  • the UE may control UL transmission based on priority when different UL signals / UL channels collide. For example, UL transmission having a high priority may be performed, and UL transmission having a low priority may not be performed (for example, dropping). Alternatively, the transmission timing of the UL transmission having a low priority may be changed (for example, postponed or shifted).
  • Collision of different UL signals / UL channels means that the time resources (or time resources and frequency resources) of different UL signals / UL channels overlap, or the transmission timings of different UL signals / UL channels overlap. May be.
  • the shared channels with different priorities may be PDSCHs with different HARQ-ACK priorities or PUSCHs with different priorities.
  • One of the existing DCI formats supported by 15 (eg DCI format 0_1 / 1-1) or the new DCI format (eg DCI format 0_2 / 1-1_2) is used to control the schedule of shared channels with different priorities. Is possible. If the UE is configured to monitor either the existing DCI format or the new DCI format, the existing DCI format or the new DCI format has a first priority (or URLLC) and a second priority (or). , EMBB) may support both schedules.
  • EMBB may support both schedules.
  • Unlicensed band In the unlicensed band (for example, 2.4 GHz band, 5 GHz band, 6 GHz band, etc.), a plurality of systems such as a Wi-Fi system and a system supporting Licensed-Assisted Access (LAA) (LAA system) coexist. Therefore, it is considered that collision avoidance and / or interference control of transmission between the plurality of systems is required.
  • LAA Licensed-Assisted Access
  • the data transmission device is a device of another device (eg, base station, user terminal, Wi-Fi device, etc.) before transmitting the data in the unlicensed band.
  • Listening Listen Before Talk (LBT), Clear Channel Assessment (CCA), carrier sense, channel sensing, sensing, channel access procedure) to confirm the presence or absence of transmission is performed.
  • LBT Listen Before Talk
  • CCA Clear Channel Assessment
  • the transmitting device may be, for example, a base station (for example, gNB: gNodeB) for the downlink (DL) and a user terminal (for example, User Equipment (UE)) for the uplink (UL).
  • a base station for example, gNB: gNodeB
  • UE User Equipment
  • the receiving device that receives the data from the transmitting device may be, for example, a user terminal in DL and a base station in UL.
  • the transmitting device starts data transmission after a predetermined period (for example, immediately after or during a backoff period) after the LBT detects that there is no transmission of another device (idle state). ..
  • unlicensed bands are also being considered for future wireless communication systems (for example, 5G, 5G +, New Radio (NR), 3GPP Rel.15 or later, etc.).
  • the NR system using the unlicensed band may be called an NR-Unlicensed (U) system, an NR LAA system, or the like.
  • NR-U may also include dual connectivity (DC) between licensed bands and unlicensed bands, and stand-alone (Stand-Alone (SA)) unlicensed bands.
  • DC dual connectivity
  • SA stand-alone
  • the node for example, base station, UE
  • NR-U confirms that the channel is free (idle) by LBT for coexistence with other systems or other operators, and then starts transmission.
  • the base station for example, gNB or the UE acquires a transmission opportunity (Transmission Opportunity (TxOP)) when the LBT result is idle and performs transmission.
  • TxOP Transmission Opportunity
  • the base station or UE does not transmit when the LBT result is busy (LBT-busy).
  • the time of the transmission opportunity may be referred to as channel occupation time (Channel Occupancy Time (COT)).
  • LBT-idle may be read as the success of LBT (LBT success).
  • LBT-busy may be read as LBT failure.
  • HARQ-ACK codebook The UE transmits HARQ-ACK feedback using one PUCCH resource in units of HARQ-ACK codebooks composed of bits of one or more delivery confirmation information (eg, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)). You may.
  • the HARQ-ACK bit may be referred to as HARQ-ACK information, HARQ-ACK information bit, or the like.
  • the HARQ-ACK codebook includes a time domain (for example, a slot), a frequency domain (for example, a component carrier (CC)), a spatial domain (for example, a layer), and a transport block (TB). )), And a bit for HARQ-ACK in at least one unit of the code block group (Code Block Group (CBG)) constituting the TB may be included.
  • the HARQ-ACK codebook may be simply referred to as a codebook.
  • the number of bits (size) and the like included in the HARQ-ACK codebook may be determined quasi-static (semi-static) or dynamically (dynamic).
  • the HARQ-ACK codebook whose size is determined quasi-statically is also called a quasi-static HARQ-ACK codebook, a type 1 HARQ-ACK codebook, or the like.
  • the HARQ-ACK codebook whose size is dynamically determined is also called a dynamic HARQ-ACK codebook, a type 2 HARQ-ACK codebook, or the like.
  • Whether to use the type 1 HARQ-ACK codebook or the type 2 HARQ-ACK codebook may be set in the UE by using the upper layer parameter (for example, pdsch-HARQ-ACK-Codebook).
  • the UE will have a PDSCH candidate (or PDSCH opportunity) corresponding to that range, with or without PDSCH scheduling, in a range (eg, a range set based on higher layer parameters).
  • a range eg, a range set based on higher layer parameters.
  • the HARQ-ACK bit for (occasion)) may be fed back.
  • the range is a set of a specific number of opportunities for receiving candidate PDSCHs, or a specific number of monitoring opportunities for a Physical Downlink Control Channel (PDCCH) for a period of time (eg, a set of candidate PDSCH receptions (PDCCH). Monitoring occasion)), the number of CCs set or activated in the UE, the number of TBs (number of layers or ranks), the number of CBGs per TB, and the presence or absence of spatial bundling. You may.
  • the specific range is also referred to as a HARQ-ACK window, a HARQ-ACK bundling window, a HARQ-ACK feedback window, and the like.
  • the UE allocates the HARQ-ACK bit for the PDSCH in the codebook even if there is no PDSCH scheduling for the UE. If the UE determines that the PDSCH is not actually scheduled, the UE can feed back the bit as a NACK bit.
  • the UE may feed back the HARQ-ACK bit for the scheduled PDSCH within the above specific range.
  • the UE determines the number of bits in the Type 2 HARQ-ACK codebook based on a particular field in the DCI (eg, the Downlink Assignment Indicator (Index) (DAI) field). May be good.
  • the DAI field may include a counter DAI (Counter DAI (C-DAI)) and a total DAI (Total DAI (T-DAI)).
  • C-DAI may indicate a counter value of downlink transmission (PDSCH, data, TB) scheduled within a specific period.
  • a C-DAI in a DCI that schedules data within the particular time period may indicate a number counted first in the frequency domain (eg, CC) and then in the time domain within the particular time period. good.
  • C-DAI may receive PDSCH or semi-persistent scheduling (SPS) for one or more DCIs included in a particular period in ascending order of serving cell index and then in ascending order of PDCCH monitoring opportunities. It may correspond to the value obtained by counting the releases.
  • SPS semi-persistent scheduling
  • T-DAI may indicate the total value (total number) of data scheduled within a specific period.
  • a T-DAI in a DCI that schedules data in a time unit (eg, PDCCH monitoring opportunity) within that particular period may be up to that time unit (also referred to as point, timing, etc.) within that particular period. It may indicate the total number of scheduled data.
  • the HARQ-ACK codebook is set separately for different service types (or PDSCH or HARQ-ACK with different priorities). That is, it is conceivable that a plurality of HARQ-ACK codebooks are simultaneously configured to support a plurality of service types (or a plurality of priorities). For example, a first HARQ-ACK codebook corresponding to URLLC (eg, first priority) and a second HARQ-ACK codebook corresponding to eMBB (eg, second priority) are configured. May be good.
  • the first PUCCH setting parameter corresponding to the first HARQ-ACK codebook (for example, PUCCH configuration or PUCH configuration parameters) and the second PUCCH setting parameter corresponding to the second HARQ-ACK codebook. May be supported or configured separately.
  • the PUCCH setting parameters are the PUCCH resource (or PUCCH resource set) applied to the HARQ-ACK transmission, the PUCCH transmission timing (for example, K1 set), the maximum coding rate (for example, max-code rate), and the PUCCH transmission. It may be at least one of the electric power.
  • the first PUCCH setting information may be applied to the HARQ-ACK feedback for URLLC
  • the second PUCCH setting information may be applied to the HARQ-ACK feedback for eMBB.
  • HARQ process For UEs configured with Carrier Aggregation (CA) or Dual Connectivity (DC), there may be one independent HARQ entity for each cell (CC) or cell group (CG).
  • CA Carrier Aggregation
  • DC Dual Connectivity
  • the HARQ entity may manage multiple HARQ processes in parallel.
  • DCI downlink control information
  • HPN downlink control information
  • HPN downlink control information
  • the HARQ entity manages multiple (up to 16) HARQ processes in parallel. That is, the HARQ process numbers exist from HPN0 to HPN15.
  • the HARQ process number is also called a HARQ process identifier (HARQ process identifier).
  • TB transport blocks
  • MAC Media Access Control
  • HARQ (retransmission) control may be performed for each TB, or for each code block group (Code Block Group (CBG)) including one or more code blocks (Code Block (CB)) in the TB. It may be done.
  • CBG Code Block Group
  • CB Code Block
  • the user terminal outputs information indicating an acknowledgment (Positive Acknowledgement (ACK)) / negative response (Negative Acknowledgement (NACK)) of HARQ indicating whether or not the DL transport block received using the PDSCH was successfully decoded.
  • ACK acknowledgement
  • NACK Negative Acknowledgement
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Control Channel
  • a single HARQ process corresponds to one transport block (TB).
  • TB transport block
  • a single HARQ process may correspond to one or more transport blocks (TB).
  • HARQ-ACK codebook containing multiple HARQ-ACK processes to provide a transmission opportunity for HARQ-ACK feedback due to an LBT failure in the UE or a PUCCH detection error in the base station. It is being considered to request or trigger the UE to provide feedback.
  • the HARQ-ACK process (eg, DL HARQ-ACK process) may be HARQ-ACK in all CCs configured on the UE in the PUCCH group.
  • HARQ-ACK (or HARQ-ACK codebook) feedback that includes multiple HARQ-ACK processes includes enhanced dynamic HARQ-ACK feedback, enhanced dynamic HARQ feedback, and group-based.
  • HARQ feedback, enhanced dynamic HARQ-ACK codebook, eType2 HARQ-ACK codebook, etc. may be referred to.
  • Enhanced dynamic HARQ feedback may be notified from the base station to the UE using a specific DCI format.
  • the particular DCI format may be a UE-specific DCI format (eg, DCI format 1-11).
  • the HARQ-ACK (or HARQ-ACK codebook) feedback which includes multiple HARQ-ACK processes, may be operated in the NR-U system.
  • a particular DCI format may include a particular field to signal (request or trigger) enhanced dynamic HARQ feedback.
  • the specific field may be at least one of a PDSCH group index (PDSCH group index) field and a number of requested PDSCH group (s) fields.
  • a specific field (eg, PDSCH group index field, Number of requested PDSCH group (s) field) contained in a specific DCI format (for example, DCI format 1-11) is a specific field.
  • the higher layer parameter pdsch-HARQ-ACK-Codebook
  • enhanced dynamics eg enhancedDynamic-r16, enhancedDynamic
  • the PDSCH group index may be an index that identifies a group of PDSCHs scheduled by DCI including the PDSCH group index.
  • the PDSCH group may be simply referred to as a "group”.
  • the UE will provide one or more HARQ feedback to the PDSCH group scheduled by that DCI at a resource. May be good. If the value of the requested PDSCH group number field in the DCI is 1, the UE has one or more HARQs for the PDSCH group scheduled by the DCI and a PDSCH group separate from the PDSCH group scheduled by the DCI. Feedback may be given at a resource. In other words, if the value of the requested PDSCH group number field in the DCI is 1, the UE may provide HARQ feedback to the PDSCH where the PDSCH group indexes 0 and 1 are set in a resource.
  • the specific DCI format may include a specific field (for example, a new feedback indicator (NFI) field).
  • NFI new feedback indicator
  • a specific upper layer parameter (pdsch-HARQ-ACK-Codebook) is set to the enhanced dynamic (enhancedDynamic-r16), and another field is used. If the upper layer parameter (NFI-TotalDAI-Included-r16) is not set, it may have a bit length of 1 bit, and in other cases, it may be 0 bit.
  • the other upper layer parameter includes the NFI and the T-DAI field of the unscheduled PDSCH group in the non-fallback DL grant DCI (eg DCI format 1-11). It may be a parameter indicating whether or not.
  • New feedback indicator The UE operation for the above new feedback indicator (New feedback indicator) will be described in detail below.
  • a UE requesting or triggering enhanced dynamic HARQ feedback may feed back a codebook containing one or more HARQ-ACK processes using PUCCH / PUSCH.
  • FIG. 1 is a diagram showing an example of an enhanced dynamic HARQ feedback method.
  • the UE monitors PDCCH1 and PDCCH2 in COT # 0 and monitors PDCCH3 in COT # 1.
  • PDSCH1, PDSCH2 and PDSCH3 are scheduled by DCI transmitted in each of PDCCH1, PDCCH2 and PDCCH3.
  • the PDSCH group index indicated for PDSCH1 is 0, and the PDSCH group index indicated for PDSCH2 and PDSCH3 is 1.
  • the UE starts LBT at the start symbols of PDCCH1 and PDCCH3.
  • the UE is instructed by PDCCH1 to transmit HARQ-ACK1 for PDSCH (PDSCH1) of group 0 in the HARQ-ACK transmission resource in COT # 0 (HARQ feedback timing (PDSCH-to-HARQ_feedback timing indicator), K1 is 2).
  • the UE does not transmit HARQ-ACK1 if the LBT at COT # 0 fails.
  • the UE when the HARQ feedback timing value (K1) included in the DCI received by the PDCCH 2 is inapplicable for HARQ-ACK2 for the PDSCH (PDSCH2) of the group 1, the UE is determined. , HARQ-ACK2 is not transmitted (HARQ-ACK2 is retained) in the HARQ-ACK transmission resource in COT # 0.
  • the UE is instructed by PDCCH3 to transmit HARQ-ACK3 for the PDSCH (PDSCH3) of group 1 in the HARQ-ACK transmission resource in COT # 1 (K1 is 2). ). Since the value of the requested PDSCH group number field included in the DCI of the PDCCH 3 is 1, the PDCCH group (PDSCH group 1) scheduled by the PDCCH 3 and the PDCCH 3 are not scheduled in the HARQ-ACK transmission resource in COT # 1. The PDSCH group (PDSCH group 0) and the HARQ-ACK for the corresponding PDSCH are transmitted.
  • the UE when the UE succeeds in LBT in COT # 1, it transmits HARQ-ACK3. At this time, the UE multiplexes the HARQ-ACK1 that was not transmitted due to the failure of the LBT in COT # 0 and the held HARQ-ACK2 to the transmission resource of the HARK-ACK3, and transmits the HARQ-ACK1.
  • the New feedback indicator (NFI) included in the DCI is about whether to reset the generation / retention (state) (eg, ACK or NACK) of the previous HARQ-ACK information for a particular HARQ process ID.
  • C-DAI and T-DAI are accumulated in the PDSCH group regardless of the PUCCH transmission opportunity. In other words, C-DAI and T-DAI are not reset by the PUCCH transmission opportunity. Further, when the UE transmits the HARQ-ACK codebook, the UE does not retain (reset) the HARQ-ACK information.
  • the DCI for scheduling PDSCH may include at least one field of C-DAI, T-DAI, PDSCH group index (GI), NFI, number of requested PDSCH groups (RG).
  • the NFI bit indicates that the C-DAI and T-DAI are flushed and generates (retains) another HARQ-ACK information for new feedback. If the bit of NFI is not toggled, the C-DAI and T-DAI are maintained (not reset). On the other hand, when the bit of NFI is toggled, the C-DAI and T-DAI are reset.
  • the NFI in the DCI has a bit length of 1 bit, the NFI will reset whether the C-DAI, T-DAI and HARQ-ACK information corresponding to the PDSCH group (GI) indicated by the DCI is reset. It is a field to indicate.
  • each bit of the NFI corresponds to one PDSCH group.
  • Each bit is a field indicating whether or not the C-DAI, T-DAI and HARQ-ACK information of the corresponding PDSCH group is reset.
  • the first (upper) bit of the 2-bit NFI corresponds to the PDSCH group indicated by the DCI of the two PDSCH groups.
  • the second (lower) bit of the 2-bit NFI corresponds to a PDSCH group of the two PDSCH groups that is different from the PDSCH group indicated by the DCI.
  • the first bit and the second bit may be the first NFI field (first New_Feedback indicator field) and the second NFI field (second New_Feedback indicator field), respectively.
  • the first bit and the second bit may correspond to the lower bit and the upper bit, respectively.
  • FIG. 2 is a diagram showing an example of holding and resetting HARQ-ACK information by NFI.
  • FIG. 2 shows an example in which the number of bits of NFI is 1.
  • the DCI received by each of the PDCCH 1-6 schedules the PDSCH 1-6, respectively.
  • the PDSCH group index (GI) indicated by DCI in PDSCH 1-6 is 0.
  • HARQ-ACK1 and 2 for PDSCH1 and 2 respectively are transmitted in the transmission resources of HARQ-ACK3 and 4 for PDSCH3 and 4 respectively due to LBT failure at COT # 0.
  • the UE receives the DCI containing the NFI value 0 until the HARQ-ACK is transmitted. Meanwhile, C-DAI and T-DAI are accumulated. After the UE transmits HARQ-ACK1-4, the PDCCH5 receives the DCI having an NFI value of 1. In this case, the generation / retention (state) of C-DAI, T-DAI and HARQ-ACK information is reset.
  • FIG. 3 is a diagram showing another example of holding and resetting HARQ-ACK information by NFI.
  • FIG. 3 shows an example in which the number of bits of NFI is 1.
  • the PDSCH group index (GI) indicated for PDSCH1, 3 and 5 is 0, and the PDSCH group index indicated for PDSCH2, 4 is 1.
  • HARQ-ACK1 and 2 for PDSCH1 and 2 respectively are notified to the UE to be transmitted in the HARQ-ACK transmission resource at COT # 0, but due to the failure of LBT at COT # 0, HARQ-ACK1 and 2 are , Not transmitted in the HARQ-ACK transmission resource at COT # 0.
  • HARQ-ACK4 for PDSCH4 is retained because the HARQ feedback timing value (K1) included in the DCI received by PDCCH4 is an inapplicable value.
  • HARQ-ACK is transmitted in the HARQ-ACK transmission resource in COT # 2.
  • the transmitted HARQ-ACK is for both PDSCH groups 0 and 1, for HARQ-ACK held by the UE, that is, for HARQ-ACK2, 4 and 6, and for PDSCH5 scheduled by PDCCH5. Includes HARQ-ACK5.
  • C-DAI and T-DAI are accumulated until HARQ-ACK corresponding to GI is transmitted.
  • the C-DAI and T-DAI contained in the DCI of PDCCH1 scheduling PDSCH1 are 1, and the C-DAI and T-DAI contained in the DCI of PDCCH3 scheduling PDSCH3.
  • the T-DAI is 2.
  • C-DAI and T-DAI which are 2 and are included in the DCI of PDCCH6 that schedules PDSCH6, are 3 (since the value of NFI contained in any DCI is not toggled (remains 0)), C- DAI and T-DAI are cumulative).
  • FIG. 4 is a diagram showing another example of holding and resetting HARQ-ACK information by NFI.
  • FIG. 4 shows an example in which the number of bits of NFI is 2.
  • PDCCH1-6 schedules PDSCH1-6, respectively.
  • the PDSCH group index (GI) of PDSCH1, 3 and 5 is 0.
  • the PDSCH group index of PDSCH2 and 4 is 1.
  • PDSCH1-6 is scheduled by DCI received by each of PDCCH1-6.
  • HARQ-ACK1 and 2 for PDSCH1 and 2 respectively are transmitted in the transmission resources of HARQ-ACK3 and 4 for PDSCH3 and 4 respectively due to LBT failure at COT # 0.
  • the UE receives a DCI containing the same value (00) of NFI until the HARQ-ACK is transmitted (from PDCCH1 to PDCCH4).
  • C-DAI and T-DAI are accumulated.
  • the PDCCH5 receives the DCI containing the toggled value (11) of the NFI.
  • NFI corresponding to PDCCH 6 is 11, but it may be any value (for example, 00, 01, 10).
  • HARQ-ACK of a specific traffic type for example, eMBB
  • HARQ-ACK of another traffic type for example, URLLC
  • the delay in a specific traffic type may increase, and the throughput may decrease or the communication quality may deteriorate.
  • the present inventors have conceived an appropriate method for controlling the transmission of HARQ-ACK when operating different traffic types. More specifically, we present the transmission of HARQ-ACK in a particular traffic type (eg, eMBB) where the transmission of HARQ-ACK is dropped by multiplexing / prioritization within the UE. / I came up with a method to apply / extend enhanced dynamic HARQ-ACK feedback to retransmissions.
  • a traffic type eg, eMBB
  • a / B may be read as at least one of A and B
  • a / B / C may be read as at least one of A, B and C.
  • indexes, IDs, indicators, resource IDs, etc. may be read as each other.
  • a field for enhanced dynamic HARQ-ACK feedback a PDSCH group index (PDSCH group index) field, a number of requested PDSCH group (s) fields, and a new feedback indicator (NFI).
  • the fields may be read interchangeably.
  • the information indicating that the first traffic type and the second traffic type are not grouped into different PDSCH groups is such that the first traffic type and the second traffic type are grouped into different PDSCH groups. It may be read as information indicating that the information is to be converted.
  • the UE will describe a case where the enhanced dynamic HARQ-ACK feedback is used in the transmission / retransmission of the HARQ-ACK, but it can be appropriately applied to any HARQ-ACK feedback method. be.
  • the first traffic type eg, URLLC
  • the second traffic type eg, eMBB
  • the UE may control the transmission of HARQ-ACK of each traffic type on the assumption that the first traffic type and the second traffic type are not grouped into different PDSCH groups.
  • the specific field included in the DCI may have a specific number of bits.
  • the UE may be instructed not to be grouped in the enhanced dynamic HARQ-ACK feedback based on a particular higher layer parameter (eg enhancedDynamicWithoutGroup).
  • a particular higher layer parameter eg enhancedDynamicWithoutGroup
  • the UE may assume that the specific field included in the DCI has a specific number of bits / bit value based on the setting / condition of one or more upper layer parameters.
  • the upper layer parameter (for example, pdsch-HARQ-ACK-Codebook) indicating the PDSCH and HARQ-ACK codebook is set to the enhanced dynamic (for example, enhancedDynamic, enhancedDynamic-r16), and the specific upper layer parameter is set.
  • the specific field included in the DCI may have a specific number of bits (for example, 0).
  • the specific field included in the DCI may be a field for enhanced dynamic HARQ-ACK feedback.
  • the specific upper layer parameter related to NFI (for example, NFI-TotalDAI-Included-r16) is set to enable and the specific upper layer parameter is the first condition (for example, the specific upper layer parameter).
  • the specific field contained in the DCI may have a specific number of bits.
  • FIG. 5A is a diagram showing an example of the relationship between the setting of the upper layer parameter indicating the presence / absence of PDSCH grouping for a plurality of traffic types and the number of bits of the field for enhanced dynamic HARQ-ACK feedback.
  • the PDSCH group index field and the requested PDSCH group number field are set to 0 bits.
  • the UE may also be instructed not to be grouped in the enhanced dynamic HARQ-ACK feedback based on the settings of certain higher layer parameters (eg, pdsch-HARQ-ACK-Codebook). For example, the UE may determine that when the particular higher layer parameter is set to certain conditions (eg enhancedDynamic-r17, enhancedDynamicWithoutGroup), it will not be grouped in the enhanced dynamic HARQ-ACK feedback.
  • certain higher layer parameters eg, pdsch-HARQ-ACK-Codebook.
  • the UE may determine that when the particular higher layer parameter is set to certain conditions (eg enhancedDynamic-r17, enhancedDynamicWithoutGroup), it will not be grouped in the enhanced dynamic HARQ-ACK feedback.
  • the specific upper layer parameter for example, pdsch-HARQ-ACK-Codebook
  • a certain condition for example, enhancedDynamicWithoutGroup
  • the specific field included in the DCI has a specific number of bits. May be good.
  • the upper layer parameter related to NFI for example, NFI-TotalDAI-Included-r16
  • the upper layer parameter indicating the condition for example, enhancedDynamicWithoutGroup
  • the specific field included in the DCI may have a specific number of bits.
  • FIG. 5B is a diagram showing an example of the relationship between the setting of the upper layer parameter indicating the presence / absence of PDSCH grouping for a plurality of traffic types and the number of bits of the field for enhanced dynamic HARQ-ACK feedback.
  • the PDSCH group index field and the requested PDSCH group number field are set to 0 bits.
  • the UE is a Rel.
  • the type 2 HARQ-ACK codebook grouping and HARQ-ACK retransmission in 16 (eg, enhanced dynamic HARQ-ACK feedback in Rel. 16) may be performed.
  • the UE sets the value of the PDSCH group index field (for example, g) and the value of the requested PDSCH group number field (for example, q) to 0, and the enhanced dynamic HARQ-ACK feedback operation causes 1 or more HARQ. -ACK may be generated.
  • HARQ-ACK may be generated according to a procedure involving triggering DAI accumulation based on the NFI field.
  • the HARQ-ACK with enhanced dynamic HARQ-ACK feedback may be set to a fixed priority.
  • HARQ-ACK with enhanced dynamic HARQ-ACK feedback may be set to a first priority (eg, High).
  • the HARQ-ACK by the enhanced dynamic HARQ-ACK feedback may be set to a second priority (for example, Low) having a lower priority than the first priority.
  • HARQ-ACK with enhanced dynamic HARQ-ACK feedback may be set / instructed based on the priority indicator field contained in a particular DCI (eg, DCI format 1-1 / 1-1_2).
  • the first traffic type (eg, URLLC) and the second traffic type (eg, eMBB) may be grouped into different PDSCH groups.
  • the UE may be instructed that the first traffic type and the second traffic type are grouped into different PDSCH groups.
  • the UE may control the transmission of HARQ-ACK of each traffic type on the assumption that the first traffic type and the second traffic type are grouped into different PDSCH groups. ..
  • the first traffic type (eg, URLLC) is grouped into a second group (eg, group 1) and the second traffic type (eg, eMBB) is grouped into a second group (eg, group 0). It may be converted. Also, for example, the first traffic type (eg, URLLC) is in the first group (eg, group 0) and the second traffic type (eg, eMBB) is in the second group (eg, group 1). Each may be grouped.
  • the UE can retransmit the HARQ-ACK corresponding to a specific group (for example, the first group) in a field for enhanced dynamic HARQ-ACk feedback included in the DCI (for example, a request PDSCH group number field). ) May be assumed / determined.
  • the HARQ-ACK by the enhanced dynamic HARQ-ACK feedback may be set to a fixed priority.
  • HARQ-ACK with enhanced dynamic HARQ-ACK feedback may be set to a first priority (eg, High).
  • the HARQ-ACK by the enhanced dynamic HARQ-ACK feedback may be set to a second priority (for example, Low) having a lower priority than the first priority.
  • HARQ-ACK with enhanced dynamic HARQ-ACK feedback may be set / instructed based on the priority indicator field contained in a particular DCI (eg, DCI format 1-1 / 1-1_2).
  • wireless communication system Wireless communication system
  • communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
  • FIG. 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
  • the wireless communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs).
  • MR-DC is a dual connectivity (E-UTRA-NR Dual Connectivity (EN-DC)) between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, and a dual connectivity (NR-E) between NR and LTE.
  • E-UTRA-NR Dual Connectivity Evolved Universal Terrestrial Radio Access (E-UTRA)
  • NR-E dual connectivity
  • NE-DC -UTRA Dual Connectivity
  • the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
  • the base station (gNB) of NR is MN
  • the base station (eNB) of LTE (E-UTRA) is SN.
  • the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
  • a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
  • NR-NR Dual Connectivity NR-DC
  • gNB NR base stations
  • the wireless communication system 1 includes a base station 11 that forms a macrocell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macrocell C1 and forms a small cell C2 that is narrower than the macrocell C1. You may prepare.
  • the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
  • the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
  • the user terminal 20 may be connected to at least one of a plurality of base stations 10.
  • the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
  • CA Carrier Aggregation
  • DC dual connectivity
  • CC Component Carrier
  • Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
  • the macrocell C1 may be included in FR1 and the small cell C2 may be included in FR2.
  • FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR 2 may be in a frequency band higher than 24 GHz (above-24 GHz).
  • the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
  • the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the plurality of base stations (for example, RRH) 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
  • wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
  • NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
  • IAB Integrated Access Backhaul
  • relay station relay station
  • the base station 10 may be connected to the core network 30 via another base station 10 or directly.
  • the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
  • a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
  • OFDM Orthogonal Frequency Division Multiplexing
  • DL Downlink
  • UL Uplink
  • CP-OFDM Cyclic Prefix OFDM
  • DFT-s-OFDM Discrete Fourier Transform Spread OFDM
  • OFDMA Orthogonal Frequency Division Multiple. Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the wireless access method may be called a waveform.
  • another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
  • the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
  • a downlink shared channel Physical Downlink Shared Channel (PDSCH)
  • a broadcast channel Physical Broadcast Channel (PBCH)
  • a downlink control channel Physical Downlink Control
  • PDSCH Physical Downlink Control
  • the uplink shared channel Physical Uplink Shared Channel (PUSCH)
  • the uplink control channel Physical Uplink Control Channel (PUCCH)
  • the random access channel shared by each user terminal 20 are used.
  • Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
  • User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
  • User data, upper layer control information, and the like may be transmitted by the PUSCH.
  • the Master Information Block (MIB) may be transmitted by the PBCH.
  • Lower layer control information may be transmitted by PDCCH.
  • the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
  • DCI Downlink Control Information
  • the DCI that schedules PDSCH may be called DL assignment, DL DCI, or the like, and the DCI that schedules PUSCH may be called UL grant, UL DCI, or the like.
  • the PDSCH may be read as DL data, and the PUSCH may be read as UL data.
  • a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
  • CORESET corresponds to a resource for searching DCI.
  • the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
  • One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
  • One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
  • One or more search spaces may be referred to as a search space set.
  • the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
  • channel state information (Channel State Information (CSI)
  • delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
  • scheduling request (Scheduling Request).
  • Uplink Control Information including at least one of SR)
  • the PRACH may transmit a random access preamble to establish a connection with the cell.
  • downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" to the beginning of various channels.
  • a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
  • the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • DeModulation Demodulation reference signal
  • Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
  • PRS Positioning Reference Signal
  • PTRS Phase Tracking Reference Signal
  • the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
  • SS, SSB and the like may also be called a reference signal.
  • a measurement reference signal Sounding Reference Signal (SRS)
  • a demodulation reference signal DMRS
  • UL-RS Uplink Reference Signal
  • UE-specific Reference Signal UE-specific Reference Signal
  • FIG. 7 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
  • the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
  • the functional block of the characteristic portion in the present embodiment is mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
  • 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 described based on the common recognition in the technical field according to the present disclosure.
  • the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
  • the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
  • the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120.
  • the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
  • the transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
  • the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
  • the transmitter / receiver 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure. be able to.
  • the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
  • the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
  • the transmitting / receiving antenna 130 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.
  • the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control HARQ retransmission control
  • the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted. Processing (if necessary), inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-analog transformation may be performed, and the baseband signal may be output.
  • channel coding may include error correction coding
  • modulation modulation
  • mapping mapping, filtering
  • DFT discrete Fourier Transform
  • IFFT inverse Fast Fourier Transform
  • precoding coding
  • transmission processing such as digital-analog transformation
  • the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
  • the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
  • the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) for the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • the transmission / reception unit 120 may perform measurement on the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
  • the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
  • RSRP Reference Signal Received Power
  • RSSQ Reference Signal Received Quality
  • SINR Signal to Noise Ratio
  • Signal strength for example, Received Signal Strength Indicator (RSSI)
  • propagation path information for example, CSI
  • the measurement result may be output to the control unit 110.
  • the transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10, etc., and user data (user plane data) for the user terminal 20 and a control plane. Data or the like may be acquired or transmitted.
  • the transmission unit and the reception unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
  • the transmission / reception unit 120 has a physical downlink shared channel (PDSCH) in which the first traffic type having the first priority and the second traffic type having the second priority lower than the first priority are different from each other. ) Information indicating that the group is not grouped may be transmitted by higher layer signaling.
  • the control unit 110 may control the reception of the Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) transmitted based on the information and corresponding to the second traffic type.
  • HARQ-ACK Hybrid Automatic Repeat reQuest ACKnowledgement
  • FIG. 8 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
  • the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
  • the functional block of the feature portion in the present embodiment is mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
  • 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 described based on the common recognition in the technical field according to the present disclosure.
  • the control unit 210 may control signal generation, mapping, and the like.
  • the control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
  • the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
  • the transmission / reception unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223.
  • the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
  • the transmitter / receiver 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.
  • the transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
  • the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
  • the transmitting / receiving antenna 230 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.
  • the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission / reception unit 220 processes, for example, PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
  • the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
  • Whether or not to apply the DFT process may be based on the transform precoding setting.
  • the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
  • the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
  • the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
  • the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
  • the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
  • the transmission / reception unit 220 may perform measurement on the received signal.
  • the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
  • the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 210.
  • the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.
  • the transmission / reception unit 220 has a physical downlink shared channel (PDSCH) in which the first traffic type having the first priority and the second traffic type having the second priority lower than the first priority are different from each other. ) Information indicating that the group is not grouped may be received by higher layer signaling.
  • the control unit 210 may control at least one of transmission and retransmission of the Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK) corresponding to the second traffic type based on the information.
  • HARQ-ACK Hybrid Automatic Repeat reQuest ACK knowledgement
  • the control unit 210 includes a PDSCH group index field in the downlink control information (DCI) based on the information when the first traffic type and the second traffic type are not grouped into different PDSCH groups. It may be assumed that at least one of the requested PDSCH group number field and the new feedback indicator field is at least one of a specific number of bits and a specific bit value.
  • DCI downlink control information
  • the control unit 210 groups the first traffic type and the second traffic type into different PDSCH groups, the retransmission of the HARQ-ACK corresponding to the second traffic type is extended and dynamic. It may be assumed that it is triggered by a field for HARQ-ACK feedback.
  • the transmission of HARQ-ACK by extended dynamic HARQ-ACK feedback may be set to a fixed priority or may be indicated by a priority indicator field included in the downlink control information (DCI).
  • DCI downlink control information
  • each functional block is realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (configuration unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the realization method is not particularly limited.
  • the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 9 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • the base station 10 and the user terminal 20 described above may 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. ..
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
  • processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
  • the processor 1001 may be mounted by one or more chips.
  • the processor 1001 For each function in the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • predetermined software program
  • the processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.
  • CPU central processing unit
  • control unit 110 210
  • transmission / reception unit 120 220
  • the like may be realized by the processor 1001.
  • 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 executes various processes according to these.
  • a program program code
  • the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
  • the memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
  • the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy disk (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, etc.). At least one of Blu-ray® discs), removable discs, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers and other suitable storage media. May be configured by.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 has, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
  • the transmission / reception unit 120 (220) may be physically or logically separated by the transmission unit 120a (220a) and the reception unit 120b (220b).
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings.
  • channels, symbols and signals may be read interchangeably.
  • the signal may be a message.
  • the reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard.
  • the component carrier CC may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.
  • the wireless frame may be configured by one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
  • the subframe may be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
  • Numerology is, for example, subcarrier interval (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, wireless frame configuration.
  • SCS subcarrier Spacing
  • TTI Transmission Time Interval
  • a specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
  • the slot may be composed of one or more symbols in the time domain (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.). Further, the slot may be a time unit based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots. Each minislot may be composed of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. The minislot may consist of a smaller number of symbols than the slot.
  • the PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may use different names corresponding to each.
  • the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
  • one subframe may be called TTI
  • a plurality of consecutive subframes may be called TTI
  • one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. May be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTI shorter than normal TTI may be referred to as shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot and the like.
  • the long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms
  • the short TTI eg, shortened TTI, etc.
  • TTI having the above TTI length may be read as TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • one or more RBs are 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, and an RB. It may be called a pair or the like.
  • PRB Physical RB
  • SCG sub-carrier Group
  • REG resource element group
  • PRB pair an RB. It may be called a pair or the like.
  • the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
  • RE Resource Element
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth Part (which may also be called partial bandwidth) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP UL BWP
  • BWP for DL DL BWP
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini-slots, and symbols are merely examples.
  • the number of subframes contained in a radio frame the number of slots per subframe or radioframe, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
  • the number of subcarriers, the number of symbols in TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
  • the radio resource may be indicated by a given index.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
  • Information, signals, etc. may be input / output via a plurality of network nodes.
  • Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
  • the notification of information is not limited to the embodiment / embodiment described in the present disclosure, and may be performed by using another method.
  • the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or combinations thereof. May be carried out by.
  • DCI downlink control information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
  • the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.
  • MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
  • CE MAC Control Element
  • the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
  • the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • the terms “system” and “network” used in this disclosure may be used interchangeably.
  • the “network” may mean a device (eg, a base station) included in the network.
  • precoding "precoding weight”
  • QCL Quality of Co-Co-Location
  • TCI state Transmission Configuration Indication state
  • space "Spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, "antenna port”, “antenna port group”, “layer”, “number of layers”
  • Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, "antenna”, “antenna element", “panel” are compatible.
  • base station BS
  • wireless base station fixed station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission point (Transmission Point (TP))
  • Reception point Reception Point
  • TRP Transmission / Reception Point
  • Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (eg, 3) cells.
  • a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio). Communication services can also be provided by Head (RRH))).
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a portion or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like.
  • the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read by the user terminal.
  • the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the user terminal 20 may have the function of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
  • the upstream channel, the downstream channel, and the like may be read as a side channel.
  • the user terminal in the present disclosure may be read as a base station.
  • the base station 10 may have the functions of the user terminal 20 described above.
  • the operation performed by the base station may be performed by its upper node (upper node) in some cases.
  • various operations performed for communication with a terminal are a base station, one or more network nodes other than the base station (for example,).
  • Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
  • Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • xG xG (xG (x is, for example, an integer or a fraction)
  • Future Radio Access FAA
  • RAT New -Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Future generation radio access
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • UMB Ultra Mobile Broadband
  • LTE 802.11 Wi-Fi®
  • LTE 802.16 WiMAX®
  • LTE 802.20 Ultra-WideBand (UWB), Bluetooth®, and other suitable radios.
  • UMB Ultra Mobile Broadband
  • references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
  • determining used in this disclosure may include a wide variety of actions.
  • judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
  • judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “determining” such as accessing) (for example, accessing data in memory).
  • judgment (decision) is regarded as “judgment (decision)” of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
  • connection are any direct or indirect connections or connections between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “bonded” to each other.
  • the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
  • the radio frequency domain microwaves. It can be considered to be “connected” or “coupled” to each other using frequency, electromagnetic energy having wavelengths in the region, light (both visible and invisible) regions, and the like.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un terminal selon un aspect de la présente divulgation est caractérisé en ce qu'il comprend une unité de réception permettant de recevoir des informations par signalisation de couche supérieure, les informations indiquant qu'un premier type de trafic ayant une première priorité et un second type de trafic ayant une seconde priorité inférieure à la première priorité ne sont pas groupés en différents groupes de canaux partagés de liaison descendante physique (PDSCH), et une unité de commande permettant de commander, sur la base des informations, la transmission et/ou la retransmission de l'accusé de réception de demande de répétition automatique hybride (HARQ-ACK) correspondant au second type de trafic. Selon l'aspect de la présente divulgation, des transmissions HARQ-ACK respectivement associées à différents types de trafic peuvent être correctement commandées.
PCT/JP2021/030022 2020-08-21 2021-08-17 Terminal, procédé de communication sans fil et station de base WO2022039155A1 (fr)

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JP2020-139859 2020-08-21

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Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MEDIATEK INC.: "Remaining issues on HARQ operation for NR-U", 3GPP DRAFT; R1-2003658, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20200525 - 20200605, 16 May 2020 (2020-05-16), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051885433 *
NOKIA, NOKIA SHANGHAI BELL: "On UCI Enhancements for URLLC", 3GPP DRAFT; R1-1901914_EURLLC UCI ENH, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Athens, Greece; 20190225 - 20190301, 15 February 2019 (2019-02-15), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051599608 *

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