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WO2020170419A1 - Terminal utilisateur et procédé de communication sans fil - Google Patents

Terminal utilisateur et procédé de communication sans fil Download PDF

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Publication number
WO2020170419A1
WO2020170419A1 PCT/JP2019/006767 JP2019006767W WO2020170419A1 WO 2020170419 A1 WO2020170419 A1 WO 2020170419A1 JP 2019006767 W JP2019006767 W JP 2019006767W WO 2020170419 A1 WO2020170419 A1 WO 2020170419A1
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WIPO (PCT)
Prior art keywords
dci
ndi
sch
pusch
indicating
Prior art date
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Ceased
Application number
PCT/JP2019/006767
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English (en)
Japanese (ja)
Inventor
翔平 吉岡
一樹 武田
聡 永田
リフェ ワン
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
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NTT Docomo Inc
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Publication date
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Priority to PCT/JP2019/006767 priority Critical patent/WO2020170419A1/fr
Publication of WO2020170419A1 publication Critical patent/WO2020170419A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present disclosure relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • Non-Patent Document 1 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), New Radio (NR), 3GPP Rel. 15 or later) is also under consideration.
  • 5G 5th generation mobile communication system
  • 5G+(plus) 5th generation mobile communication system
  • NR New Radio
  • 3GPP Rel. 15 or later 3th generation mobile communication system
  • the user terminal uses a physical uplink shared channel (for example, Physical Uplink) based on downlink control information (DCI).
  • DCI downlink control information
  • PUSCH Physical Uplink shared channel
  • PDSCH Physical Downlink Control Channel
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the UE may transmit not only the physical uplink shared channel in which the corresponding transport channel exists (for example, Physical Uplink Shared Channel: PUSCH) but also the physical uplink shared channel in which the corresponding transport channel does not exist.
  • PUSCH Physical Uplink Shared Channel
  • the transport channel corresponding to PUSCH may be called an uplink shared channel (UL-SCH), an uplink transport channel, uplink data, a transport block (TB), or the like.
  • the user terminal performs a predetermined Hybrid Automatic Repeat reQuest (HARQ) process based on whether a predetermined field in the DCI (for example, a New Data Indicator (NDI) field) is toggled.
  • HARQ Hybrid Automatic Repeat reQuest
  • NDI New Data Indicator
  • the present disclosure has been made in view of the above points, and an object of the present disclosure is to provide a user terminal and a wireless communication method capable of appropriately controlling UL-SCH retransmission.
  • a user terminal is based on a receiving unit that receives downlink control information (DCI) indicating that a transport channel is not transmitted on a physical uplink shared channel, and a new data identifier (NDI) in the DCI. Or, regardless of the NDI, a control unit that controls storage of the transport channel associated with the same Hybrid Automatic Repeat reQuest (HARQ) process as the physical uplink shared channel in the memory. Is characterized by.
  • DCI downlink control information
  • NDI new data identifier
  • a control unit that controls storage of the transport channel associated with the same Hybrid Automatic Repeat reQuest (HARQ) process as the physical uplink shared channel in the memory. Is characterized by.
  • HARQ Hybrid Automatic Repeat reQuest
  • UL-SCH retransmission can be appropriately controlled.
  • FIG. 1A and 1B are diagrams showing an example of retransmission control of UL data based on NDI.
  • FIG. 2 is a diagram illustrating an example of a case where the same HPN is assigned to the PUSCH with UL-SCH and the PUSCH without UL-SCH.
  • 3A and 3B are diagrams illustrating an example of UL-SCH control according to the first aspect.
  • 4A and 4B are diagrams showing an example of UL-SCH control according to the second mode.
  • 5A and 5B are diagrams showing an example of UL-SCH control according to the second mode.
  • FIG. 6 is a diagram showing an example of DCI according to the sixth aspect.
  • FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 1A and 1B are diagrams showing an example of retransmission control of UL data based on NDI.
  • FIG. 2 is a diagram illustrating an example of a case where the same HPN
  • FIG. 8 is a diagram illustrating an example of the configuration of the base station according to the embodiment.
  • FIG. 9 is a diagram illustrating an example of the configuration of the user terminal according to the embodiment.
  • FIG. 10 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.
  • CSI report In NR, the UE reports (transmits or transmits) Channel State Information (CSI) measured (generated) based on a downlink reference signal (DL-RS) to a base station (eg, gNB). Feedback) CSI reporting is supported.
  • DL-RS downlink reference signal
  • gNB base station
  • DL-RS for CSI measurement is, for example, at least a channel state information reference signal (Channel State Information-Reference Signal: CSI-RS) and a synchronization signal block (Synchronization Signal Block: SSB) (or signals forming SSB). It may be one.
  • CSI-RS Channel State Information-Reference Signal
  • SSB Synchronization Signal Block
  • An SSB is a resource (block) including at least one of a synchronization signal (Synchronization Signal: SS) and a broadcast channel (Physical Broadcast Channel: PBCH), and may be called an SS/PBCH block.
  • the SS may include at least one of a primary synchronization signal (Primary SS:PSS) and a secondary synchronization signal (Secondary SS:SSS).
  • the UE may measure the CSI using the DL-RS resource (DL-RS resource).
  • the DL-RS resource is, for example, at least one of a resource for CSI-RS (CSI-RS resource) and an SS/PBCH block (or a resource for SS/PBCH block (SS/PBCH block resource)). May be.
  • CSI is a channel quality indicator (CQI), a precoding matrix identifier (precoding matrix indicator: PMI), a CSI-RS resource identifier (CSI-RS resource indicator: CRI), which is an identifier of a CSI-RS resource, and an SS.
  • /PBCH block resource identifier (SS/PBCH Block Resource indicator: SSBRI) which is an identifier of /PBCH block resource, layer identifier (layer indicator (LI)), rank identifier (rank indicator (RI)), reference signal in the physical layer It may include at least one of the received power (Layer 1 Reference Signal Received Power: L1-RSRP).
  • the CSI report includes periodic CSI report (P-CSI report), CSI report using a semi-persistent (Semi-Persistent) designated resource (SP-CSI report), non- Periodic CSI reporting (A-CSI reporting) is supported.
  • P-CSI report periodic CSI report
  • SP-CSI report semi-persistent designated resource
  • A-CSI reporting non- Periodic CSI reporting
  • the UE When performing A-CSI reporting, the UE transmits A-CSI according to the CSI trigger (CSI request) from the base station. For example, the UE makes an A-CSI report after a predetermined period of time after receiving the CSI trigger.
  • the CSI trigger CSI request
  • the A-CSI trigger is included in downlink control information (DCI) transmitted using a downlink control channel (PDCCH).
  • DCI downlink control information
  • PDCCH downlink control channel
  • the A-CSI trigger may be a value of a predetermined field (CSI request field) in DCI.
  • the DCI including the A-CSI trigger is, for example, DCI format 0_1, but is not limited to this.
  • the DCI may be a DCI (UL grant, for example, at least one of DCI formats 0_0 and 0_1) used for scheduling of an uplink shared channel (Physical Uplink Shared Channel: PUSCH).
  • PUSCH Physical Uplink Shared Channel
  • the user terminal may transmit CSI using PUSCH scheduled by DCI including A-CSI trigger. If the corresponding transport channel (Uplink Shared Channel: UL-SCH) does not exist, the PUSCH is also called PUSCH without UL-SCH (PUSCH without UL-SCH) or the like.
  • UL-SCH Uplink Shared Channel
  • Whether or not it is a PUSCH without UL-SCH may be indicated by a predetermined field in DCI (for example, UL-SCH indicator (UL-SCH indicator) field).
  • the UL-SCH identifier field may be 1 bit.
  • the UL-SCH identifier field may be set to 0 if PUSCH without UL-SCH is triggered, and the UL-SCH identifier field may be set to 1 if PUSCH with UL-SCH is triggered.
  • NDI New Data Indicator
  • the UE uses the UL data in the HARQ process of the same HARQ process number (HPN) based on whether the value of the NDI field in the DCI used for PUSCH scheduling is toggled. May be controlled.
  • HPN may be paraphrased as a HARQ process ID or the like.
  • toggle of NDI may mean that the value of NDI is different from that of DCI before scheduling UL data of the same HPN.
  • the UE may make an initial transmission of UL data in the HARQ process of the HPN.
  • not toggled NDI may mean that the values of DCI and NDI before scheduling UL data of the same HPN are the same.
  • the UE may retransmit UL data in the HARQ process of the HPN.
  • FIGS. 1A and 1B show an example of retransmission control of UL data based on NDI.
  • predetermined fields for example, HPN fields
  • the UE may perform the initial transmission of UL data #0.
  • the UE stores the UL data #0 in a memory (also referred to as a buffer, a soft buffer, etc.) until receiving the same HPN #0 and a DCI indicating a toggled NDI (toggle NDI). store)
  • the base station may transmit the same HPN#0 as UL data #0 and DCI indicating the toggled NDI when the reception processing (for example, decoding) of UL data #0 is successful. For example, if the NDI in the DCI at the time of the first transmission of UL data #0 is “1”, the toggled NDI may be “0”.
  • the UE indicates the same HPN #0 and the toggled NDI as the UL data #0 by the detected DCI, so the UL data #1 different from the UL data #0 may be transmitted for the first time. Also, the UE may flush the UL data #0 stored in the memory.
  • the base station when the base station fails to receive the UL data #0, it shows the same HPN #0 as the UL data #0 and the NDI that is not toggled (no toggle NDI).
  • DCI may be transmitted. For example, if the NDI in the DCI at the time of the first transmission of UL data #0 is “1”, the NDI that is not toggled may be “1”. Since the detected DCI indicates the same HPN #0 as UL data #0 and NDI which is not toggled, the UE may retransmit UL data #0.
  • retransmission of UL data is controlled based on NDI and HPN indicated by DCI that schedules the PUSCH.
  • HPN is assigned to the PUSCH with UL-SCH (UL data) and the PUSCH without UL-SCH, the UE may not be able to appropriately control the retransmission of UL data.
  • FIG. 2 is a diagram showing an example of the case where the same HPN is assigned to the PUSCH with UL-SCH and the PUSCH without UL-SCH.
  • FIG. 2 shows an example in which a PUSCH with UL-SCH or a PUSCH without UL-SCH is scheduled by each DCI (for example, DCI format 0_1) including the UL-SCH identifier field.
  • DCI for example, DCI format 0_1
  • a PUSCH with UL-SCH may be scheduled by DCI that does not include the UL-SCH identifier field (eg DCI format 0_0).
  • UL-SCH is PUSCH. If the UE detects a DCI #1 that includes a UL-SCH identifier field value (eg, “0”) indicating that the UL data #0 is not transmitted, the UE may not be able to properly retransmit the UL data #0. ..
  • the base station fails to receive UL data #0 using PUSCH scheduled by DCI #0.
  • PUSCH without UL-SCH is scheduled by DCI#1 in the same HPN#0 as UL data#0.
  • the UE cannot recognize that the base station has failed to receive the UL data #0.
  • the UE flushes the UL data#0 stored in the memory and requests the CSI request in the DCI#1. It is assumed that the CSI (A-CSI) designated by a value other than 0 (for example, 11 in FIG. 2 but not limited to this) is transmitted.
  • MAC Medium Access Control
  • PDCP Packet Data Convergence Protocol
  • the present inventors can appropriately maintain or flush UL data in the memory. , And an idea to appropriately control the retransmission of the UL data (first to third and fifth modes).
  • the present inventors assume (expect) that the UE is not assigned to the PUSCH without the UL-SCH until the HPN assigned to the PUSCH with the UL-SCH (UL data) is satisfied by a predetermined condition. It was conceived to appropriately control the retransmission of the UL data (fourth aspect). Further, the present inventors conceived to appropriately control the retransmission of the UL data by ignoring at least one of the NDI field and the HPN field in the DCI indicating that the UL-SCH is not transmitted on the PUSCH. (Sixth aspect).
  • PUSCH without UL-SCH is not limited to A-CSI reporting.
  • the usage of PUSCH without UL-SCH may be used for transmission of uplink control information (UCI) including at least one of HARQ-ACK, CSI, and scheduling request.
  • UCI uplink control information
  • UL-SCH may be paraphrased with UL data, transport block (TB), code block group (CBG), code block (CB), transport channel, etc.
  • the CBG may be composed of one or a plurality of CBs
  • the TB may be composed of one or a plurality of CBGs.
  • the UL-SCH may include at least one of user data and upper layer control information (upper layer parameter).
  • HPN may be called a HARQ process of the HPN, or simply a HARQ process.
  • the PUSCH is supposed to be scheduled by DCI (for example, DCI format 0_1) including the UL-SCH identifier field, but the scheduling is not limited to this.
  • a PUSCH with UL-SCH may be scheduled by DCI that does not include the UL-SCH identifier field (eg DCI format 0_0).
  • the UE has a memory of (corresponding) UL-SCH (UL data) associated with the same PUPN as the PUSCH based on the NDI in the DCI indicating that the UL-SCH is not transmitted on the PUSCH. Storage within may be controlled.
  • the UE may keep the UL-SCH stored in the memory with the same HPN as the PUSCH without the UL-SCH if the NDI is not toggled. That is, the UE may retransmit the UL-SCH if the DCI received after the DCI indicates the same HPN, the UL-SCH is transmitted on the PUSCH, and the NDI is not toggled. Expects (also called assumptions) may be made. On the other hand, when the NDI is toggled, the UE may flush (delete) the UL-SCH stored in the memory with the same HPN.
  • FIGS. 3A and 3B are diagrams showing an example of UL-SCH control according to the first aspect.
  • HPN for example, #0
  • FIGS. 3A and 3B it is assumed that the same HPN (for example, #0) is assigned to PUSCH with UL-SCH and PUSCH without UL-SCH.
  • the DCI#0 including the HPN field value indicating HPN#0 and the UL-SCH identifier field value indicating that UL-SCH is transmitted on PUSCH is indicated by the UE.
  • the UE performs the initial transmission of UL data (also referred to as UL-SCH etc.) #0 stored in the memory using PUSCH scheduled by DCI #0.
  • the UE transmits the UL data #0 for the first time with HPN #0, and then the HPN field value indicating the same HPN #0, UL-SCH indicating that the UL-SCH is not transmitted on PUSCH.
  • -DCI#1 containing the SCH identifier field value (eg "0") is detected by the UE.
  • the UE uses the PUSCH to specify the A-CSI specified by a value other than 0 of the CSI request field in DCI#1 (eg, 11 in FIG. 2, but not limited to this). You may use and it may transmit by HPN#0.
  • the UE may maintain UL data #0 stored in memory.
  • the HPN field value indicating the same HPN#0 and the UL-SCH identifier field value indicating that the UL-SCH is transmitted on the PUSCH are included.
  • DCI#2 is detected by the UE.
  • the UE can retransmit UL data #0 stored in the memory using PUSCH scheduled by DCI #2.
  • the UE may flush the UL data #0 stored in memory.
  • DCI#2 indicating that the same HPN#0 and UL-SCH are transmitted on PUSCH is detected by the UE.
  • the UE when the NDI of DCI#2 is toggled (for example, the NDI in DCI#2 is different from the NDI in the latest DCI#1 indicating the same HPN#0), the UE , PUI scheduled by DCI #2 can be used to perform the initial transmission of UL data #1 different from UL data #0.
  • the toggle of the NDI in the DCI #1 is controlled according to the decoding result of the UL data #0, and the UL data #0 is maintained in the memory or flushed based on the NDI. It is decided whether to do it. Therefore, even when the same HPN is assigned to the PUSCH with UL-SCH and the PUSCH without UL-SCH, the retransmission of UL data #0 transmitted on the PUSCH with UL-SCH is appropriately controlled. it can.
  • the toggle of the NDI in the DCI#2 may be controlled based on the NDI in the most recent DCI#1 indicating the same HPN#0. In this way, the UE determines whether the NDI in each DCI is toggled, regardless of whether the most recent DCI indicating the same HPN is the PUSCH with UL-SCH. May be determined based on the NDI of.
  • the storage of the UL-SCH associated with the same HPN as the PUSCH in the memory is controlled. Therefore, retransmission of the UL-SCH can be controlled appropriately.
  • the UE is associated with (corresponding to) the same HPN as the PUSCH regardless of whether the NDI in the DCI indicating that the UL-SCH is not transmitted on the PUSCH is toggled.
  • the SCH may be flushed from within memory. That is, the UE does not have to expect the UL-SCH to be transmitted on the PUSCH if the DCI received after the DCI indicates the same HPN and the NDI is not toggled.
  • FIGS. 4A and 4B are diagrams showing an example of UL-SCH control according to the second mode. Note that FIGS. 4A and 4B will be described focusing on differences from FIGS. 3A and 3B, respectively.
  • the NDI in DCI#1 indicating that the UL-SCH is not transmitted on the PUSCH is not toggled (FIG. 4A) or is toggled (FIG. 4B). Also, the UE may flush the UL data #0 stored in memory.
  • the UE indicates whether the NDI in the DCI indicating the PUSCH with UL-SCH is toggled, and the latest DCI indicating the same HPN is the PUSCH with UL-SCH. It may be determined based on the NDI in the latest DCI regardless of whether or not.
  • the UE when the UE detects DCI#2 indicating that it is a PUSCH with UL-SCH, the latest DCI#1 indicating the same HPN#0 as the DCI#2 is UL- Even if PUSCH without SCH is indicated, whether NDI in DCI#2 is toggled may be determined based on NDI in DCI#1.
  • the UE indicates whether the NDI in the DCI, which indicates the PUSCH with UL-SCH, is toggled and indicates the PUSCH with UL-SCH, and the same. May be determined based on the NDI in the latest DCI indicating the HPN of the.
  • the UE when the UE detects DCI#2 indicating that it is a PUSCH with UL-SCH, it indicates that it is a PUSCH with UL-SCH, and the same HPN is most recently displayed. Whether or not the NDI in DCI#2 is toggled may be determined based on the NDI in DCI#0.
  • the UE is associated with (corresponding to) the same HPN as the PUSCH regardless of whether the NDI in the DCI indicating that the UL-SCH is not transmitted on the PUSCH is toggled (corresponding) UL-
  • the SCH may be maintained in memory. That is, the UE may retransmit the UL-SCH if the DCI received after the DCI indicates the same HPN, the UL-SCH is transmitted on the PUSCH, and the NDI is not toggled. May be expected.
  • FIGS. 5A and 5B are diagrams showing an example of UL-SCH control according to the second mode. Note that FIGS. 5A and 5B will be described focusing on differences from FIGS. 3A and 3B, respectively.
  • the NDI in DCI#1 indicating that the UL-SCH is not transmitted on the PUSCH is not toggled (FIG. 5A) or is toggled (FIG. 5B).
  • the UE may maintain UL data #0 stored in memory.
  • the UE indicates whether the NDI in the DCI indicating the PUSCH with UL-SCH is toggled or not, and the latest DCI indicating the same HPN is the PUSCH with UL-SCH. It may be determined based on the NDI in the latest DCI regardless of whether or not.
  • the UE when the UE detects DCI#2 indicating that it is a PUSCH with UL-SCH, the latest DCI#1 indicating the same HPN#0 as that DCI#2 is UL- Even if PUSCH without SCH is indicated, whether NDI in DCI#2 is toggled may be determined based on NDI in DCI#1.
  • the toggle of NDI in DCI#1 may be controlled based on the decoding result of UL data associated with the same HPN#0 as DCI#1. For example, as shown in FIG. 5A, when decoding of UL data #0 associated with the same HPN #0 as DCI #1 fails, NDI in DCI #1 may not be toggled. On the other hand, as shown in FIG. 5B, when the UL data #0 is successfully decoded, the NDI in the DCI #1 may be toggled.
  • the UE indicates whether the NDI in the DCI indicating the PUSCH with UL-SCH is toggled and is the PUSCH with UL-SCH, and the same. May be determined based on the NDI in the latest DCI indicating the HPN of the.
  • the UE when the UE detects DCI#2 indicating that it is a PUSCH with UL-SCH, it indicates that it is a PUSCH with UL-SCH and the same HPN immediately Whether or not the NDI in DCI#2 is toggled may be determined based on the NDI in DCI#0.
  • the UE when the NDI in the DCI#2 is not toggled (it has the same value as the NDI in the DCI#0), the UE associates with the same HPN#0 as the DCI#2.
  • the UL data #0 to be transmitted can be retransmitted.
  • the UE when the NDI in the DCI #2 is toggled (it has a different value from the NDI in the DCI #0), the UE transmits the UL data #1 different from the UL data #0. It can be sent for the first time.
  • the NDI in DCI#1 is checked for virtual cyclic redundancy check (virtual Cyclic Redundancy Check: virtual). It may be used as a bit for CRC), a dummy bit, or the like.
  • the UL data #0 associated with the same HPN#0 as the DCI#1 is stored in the memory. Maintained within. For this reason, when PUSCH without UL-SCH is scheduled in the same HPN after PUSCH with UL-SCH, retransmission of UL-SCH can be appropriately controlled.
  • the UE specifies that once a given (given) HPN is assigned to the PUSCH with UL-SCH, the HPN is designated in the DCI indicating the PUSCH without UL-SCH. You don't have to assume.
  • the UE may assume that the base station has succeeded in decoding the UL-SCH when the predetermined HPN is newly allocated to the PUSCH without the UL-SCH.
  • HPN for PUSCH with UL-SCH for example, HPN #0 to 7
  • HPN for PUSCH without UL-SCH for example, HPN #8
  • HPN #8 may be distinguished in advance.
  • the UE does not have to assume that the same HPN as the UL-SCH for which the reception processing in the base station has failed is assigned to the PUSCH without the UL-SCH, and therefore the retransmission control of the UL-SCH is performed. Can be simplified.
  • the UE when the UE detects a DCI indicating that the UL-SCH is not transmitted on the PUSCH, whether the UE maintains UL data associated with the same HPN as the DCI in the memory (flash from the memory). Whether to keep in memory or to flush from memory) may be up to implementation of the UE.
  • the base station may assume that UL data associated with the same HPN as the DCI is flushed by the UE. This allows the base station to operate on the safer side. Assuming that UL data associated with the same HPN has been flushed by the UE but is kept in memory, if the NDI is not toggled, incorrect data may be transmitted from the UE. is there.
  • the base station toggles the NDI in the DCI indicating that the PUSCH has the UL-SCH and determines whether the latest DCI indicating the same HPN is the PUSCH having the UL-SCH. Regardless of this, control may be performed based on the NDI in the latest DCI.
  • the base station may control the toggle of the NDI in the DCI#2 based on the NDI in the DCI#1 as described in FIGS. 4A and 4B of the third aspect. For example, when the base station toggles the NDI in DCI#2, the base station may set a value different from the NDI in DCI#1 to the NDI in DCI#2. On the other hand, if the base station does not toggle the NDI in DCI#2, the base station may set the same value as the NDI in NDI#1 to the NDI in DCI#2.
  • the base station indicates whether or not to toggle the NDI in the DCI indicating the PUSCH with the UL-SCH, indicating the PUSCH with the UL-SCH, and indicating the latest HPN. It may be determined based on the NDI in the DCI.
  • the base station may control the toggle of the NDI in DCI#2 based on the NDI in DCI#0, as described in FIGS. 4A and 4B of the third aspect. For example, when the base station toggles the NDI in DCI#2, the base station may set a value different from the NDI in DCI#0 to the NDI in DCI#2. On the other hand, when the base station does not toggle the NDI in DCI#2, the base station may set the same value as the NDI in NDI#0 to the NDI in DCI#2.
  • the base station can appropriately control the UL-SCH retransmission even when the UE implements different operations.
  • the UE may ignore the HPN field and the NDI field in the DCI when detecting the DCI indicating that the UL-SCH is not transmitted on the PUSCH. At this time, the UE indicates whether the NDI of the DCI received immediately after the above DCI is toggled, indicating that it is the PUSCH with UL-SCH, and the NDI in the latest DCI indicating the same HPN. May be determined based on.
  • FIG. 6 is a diagram showing an example of DCI according to the sixth aspect.
  • the value of the UL-SCH identifier field in DCI (eg, "0") may indicate that the UL-SCH is not transmitted on PUSCH.
  • the UE may control reporting of CSI measured using a predetermined DL-RS based on the value of the CSI request field.
  • the value of the CSI request field may be other than 0. Further, the value of the CSI request field may have a variable number of bits.
  • the UE does not have to perform an operation based on at least one value of the NDI field and the HPN field even if the DCI includes the NDI field and the HPN field.
  • the UE may use at least one of the NDI field and the HPN field as a virtual CRC bit or a dummy bit.
  • the UE ignores the NDI field and the HPN field in DCI indicating that the UL-SCH is not transmitted on PUSCH. Therefore, the UE can appropriately control the UL-SCH retransmission based on the DCI indicating that the UL-SCH is not transmitted on the PUSCH.
  • wireless communication system Wireless communication system
  • communication is performed using any one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.
  • FIG. 7 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 by 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 multiple Radio Access Technologies (RATs).
  • MR-DC has dual connectivity (E-UTRA-NR Dual Connectivity (EN-DC)) with LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, and dual connectivity (NR-E) with NR and LTE.
  • E-UTRA-NR Dual Connectivity EN-DC
  • NR-E Dual Connectivity
  • NE-DC Dual Connectivity
  • the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)).
  • the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
  • the wireless communication system 1 has dual connectivity between a plurality of base stations within 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.
  • dual connectivity NR-NR Dual Connectivity (NN-DC)
  • N-DC dual connectivity
  • MN and SN are NR base stations (gNB).
  • the wireless communication system 1 includes a base station 11 forming a macro cell C1 having a relatively wide coverage and a base station 12 (12a-12c) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. You may prepare.
  • the user terminal 20 may be located in at least one cell. The arrangement and number of each cell and user terminal 20 are not limited to those 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 the plurality of base stations 10.
  • the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) using a plurality of component carriers (Component Carrier (CC)) and dual connectivity (DC).
  • CA Carrier Aggregation
  • CC Component Carrier
  • DC dual connectivity
  • Each CC may 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 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 FR2 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 in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the plurality of base stations 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 the base stations 11 and 12, the base station 11 corresponding to the upper station is the Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (IAB) is the IAB. It may be called a node.
  • IAB Integrated Access Backhaul
  • IAB 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 of, for example, 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 compatible with at least one of communication methods such as LTE, LTE-A, and 5G.
  • an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) based wireless access method may be used.
  • OFDM Orthogonal Frequency Division Multiplexing
  • DL Downlink
  • UL Uplink
  • 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.
  • other wireless access methods eg, other single carrier transmission method, other multicarrier transmission method
  • the UL and DL wireless access methods may be used as the UL and DL wireless access methods.
  • downlink shared channels Physical Downlink Shared Channel (PDSCH)
  • broadcast channels Physical Broadcast Channel (PBCH)
  • downlink control channels Physical Downlink Control
  • an uplink shared channel Physical Uplink Shared Channel (PUSCH)
  • an uplink control channel Physical Uplink Control Channel (PUCCH)
  • a random access channel that are shared by each user terminal 20.
  • Physical Random Access Channel (PRACH) Physical Random Access Channel
  • 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 downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH, for example.
  • DCI Downlink Control Information
  • the DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc.
  • the DCI for scheduling PUSCH may be called UL grant, UL DCI, etc.
  • PDSCH may be replaced with DL data
  • PUSCH may be replaced with UL data.
  • a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect the PDCCH.
  • CORESET corresponds to a resource for searching DCI.
  • the search space corresponds to the search area and the search method of the PDCCH candidates (PDCCH candidates).
  • a CORESET may be associated with one or more search spaces. The UE may monitor 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. Note that 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 eg, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
  • scheduling request (Scheduling Request (Scheduling Request ( Uplink Control Information (UCI) including at least one of (SR))
  • CSI Channel State Information
  • HARQ-ACK Hybrid Automatic Repeat reQuest ACKnowledgement
  • ACK/NACK ACK/NACK
  • scheduling request Scheduling Request (Scheduling Request ( Uplink Control Information (UCI) including at least one of (SR)
  • a random access preamble for establishing a connection with a cell may be transmitted by the PRACH.
  • downlink, uplink, etc. may be expressed without adding “link”. Further, it may be expressed without adding "Physical" to the head of each channel.
  • a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may be transmitted.
  • a cell-specific reference signal Cell-specific Reference Signal (CRS)
  • a channel state information reference signal Channel State Information Reference Signal (CSI-RS)
  • CSI-RS Channel State Information Reference Signal
  • DMRS Demodulation reference signal
  • PRS Positioning Reference Signal
  • PTRS Phase Tracking Reference Signal
  • the synchronization signal may be at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)), for example.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS block (SSB), or the like. Note that SS and SSB may also be referred to as reference signals.
  • 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. 8 is a diagram illustrating 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. It should be noted that the control unit 110, the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140 may each be provided with one or more.
  • the functional blocks of the characteristic part in the present embodiment are 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 unit described below may be omitted.
  • the control unit 110 controls the entire base station 10.
  • the control unit 110 can be configured by a controller, a control circuit, and the like described based on 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 using the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140, and measurement.
  • the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer the generated 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, wireless resource management, 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 transmission/reception unit 120 includes a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission/reception circuit, etc., which are explained based on common knowledge 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 configured by a transmission unit and a reception unit.
  • the transmission unit may include a transmission processing unit 1211 and an RF unit 122.
  • the receiving unit may include a reception processing unit 1212, an RF unit 122, and a measuring unit 123.
  • the transmission/reception antenna 130 can be configured by an antenna described based on common recognition in the technical field of the present disclosure, for example, an array antenna or the like.
  • the transmitter/receiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transceiver 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), or the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission/reception unit 120 processes the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer (for example, for the data and control information acquired from the control unit 110) (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access 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)) on the bit string to be transmitted. Processing (if necessary), inverse fast Fourier transform (Inverse Fast Transform (IFFT)) processing, precoding, digital-analog conversion, and other transmission processing may be performed to output the baseband signal.
  • channel coding may include error correction coding
  • modulation modulation
  • mapping mapping, filtering
  • DFT discrete Fourier transform
  • IFFT inverse fast Fourier transform
  • precoding coding
  • digital-analog conversion digital-analog conversion
  • the transmitting/receiving unit 120 may modulate the baseband signal into a radio frequency band, perform filtering, amplifying, etc., and transmit the radio frequency band signal via the transmission/reception antenna 130. ..
  • the transmission/reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc., 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 (Fast Fourier Transform (FFT)) processing, and inverse discrete Fourier transform (Inverse Discrete Fourier Transform (IDFT)) on the acquired baseband signal. )) Applying reception processing such as processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, User data 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, etc. based on the received signal.
  • the measurement unit 123 receives power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
  • Signal strength for example, Received Signal Strength Indicator (RSSI)
  • channel 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 devices included in the core network 30, other base stations 10, and the like, 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 may be configured by at least one of the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140.
  • the transmitter/receiver 120 may also transmit downlink control information (DCI) indicating that the transport channel is not transmitted on the physical uplink shared channel.
  • DCI downlink control information
  • the transmission/reception unit 120 may transmit another DCI indicating the same HARQ process as the DCI and indicating that the transport channel is transmitted on the physical uplink shared channel.
  • the control unit 110 may control the toggle of the new data identifier (NDI) in the downlink control information (DCI) used for scheduling the physical uplink shared channel.
  • the DCI may indicate that the transport channel is not transmitted on the physical uplink shared channel, or may indicate that the transport channel is transmitted on the physical uplink shared channel.
  • the control unit 110 may control the toggle of the NDI in the DCI based on the decoding result of the transport channel associated with the same HARQ process as the DCI. Specifically, when the decoding of the transport channel is successful, the control unit 110 may toggle the NDI in the DCI. On the other hand, when decoding of the transport channel fails, the control unit 110 does not have to toggle the NDI in the DCI.
  • the control unit 110 transmits another DCI indicating that the transport channel is transmitted on the physical uplink shared channel
  • the latest DCI indicating the same HARQ process is not transmitted on the physical uplink shared channel.
  • the toggle of the NDI in the other DCI may be controlled based on the NDI in the latest DCI.
  • the control unit 110 When transmitting another DCI indicating that the transport channel is transmitted on the physical uplink shared channel, the control unit 110 indicates the latest DCI indicating that the transport channel is transmitted on the physical uplink shared channel.
  • the toggle of the NDI in the other DCI may be controlled based on the NDI in the.
  • the control unit 110 When transmitting the DCI indicating that the transport channel is transmitted on the physical uplink shared channel, the control unit 110 indicates the same HARQ process as the DCI and transmits the transport channel on the physical uplink shared channel. It is not necessary to transmit the DCI indicating that it is not performed (fourth aspect).
  • control unit 110 may assume that the transport channel associated with the same HARQ process as the DCI is flushed ( Fifth aspect).
  • FIG. 9 is a diagram illustrating 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. Note that each of the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided with one or more.
  • the functional blocks of the characteristic part in the present embodiment are mainly shown, and the user terminal 20 may be assumed to also have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
  • the control unit 210 controls the entire user terminal 20.
  • the control unit 210 can be configured by a controller, a control circuit, and the like described based on 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, etc., 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 may include 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 common knowledge in the technical field of the present disclosure.
  • the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit.
  • the transmission unit may include a transmission processing unit 2211 and an RF unit 222.
  • the receiving unit may include a reception processing unit 2212, an RF unit 222, and a measuring unit 223.
  • the transmission/reception antenna 230 can be configured from an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.
  • the transmitter/receiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transceiver 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), or the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission/reception unit 220 processes the PDCP layer, the RLC layer (for example, RLC retransmission control), and the MAC layer (for example, for the data and control information acquired from the control unit 210). , HARQ retransmission control) may be performed to generate a bit string to be transmitted.
  • the transmission/reception unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing on the bit string to be transmitted.
  • the baseband signal may be output by performing transmission processing such as precoding, digital-analog conversion, or the like.
  • the transmission/reception unit 220 transmits the channel using the DFT-s-OFDM waveform when transform precoding is enabled for the channel (for example, PUSCH).
  • the DFT process may be performed as the transmission process, or otherwise, the DFT process may not be performed as the transmission process.
  • the transmission/reception unit 220 may modulate the baseband signal into a radio frequency band, perform filtering, amplification, etc., and transmit the radio frequency band signal via the transmission/reception antenna 230. ..
  • the transmission/reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, etc., 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-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (error correction) on the acquired baseband signal.
  • User data and the like may be acquired by applying reception processing such as MAC layer processing, RLC layer processing, and PDCP layer processing.
  • the transmission/reception unit 220 may perform measurement on the received signal.
  • the measurement unit 223 may perform RRM measurement, CSI measurement, and the like based on the received signal.
  • the measurement unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), channel information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 210.
  • the transmission unit and the reception unit of the user terminal 20 may be configured by at least one of the transmission/reception unit 220, the transmission/reception antenna 230, and the transmission path interface 240.
  • the transmitter/receiver 220 may receive downlink control information (DCI) indicating that the transport channel is not transmitted on the physical uplink shared channel. Also, the transceiver 220 may receive another DCI that indicates the same HARQ process as the DCI and that indicates that the transport channel is transmitted on the physical uplink shared channel.
  • DCI downlink control information
  • the control unit 210 uses the transport channel associated with the same Hybrid Automatic Repeat reQuest (HARQ) process as the physical uplink shared channel based on the new data identifier (NDI) in the DCI or regardless of the NDI. May be controlled to be stored in the memory.
  • HARQ Hybrid Automatic Repeat reQuest
  • the control unit 210 may maintain the transport channel associated with the same HARQ process in the memory when the NDI is not toggled (first aspect). On the other hand, the control unit 210 may delete the transport channel associated with the same HARQ process from the memory when the NDI is toggled (first aspect).
  • the controller 210 may delete the transport channel associated with the same HARQ process from the memory or maintain it in the memory regardless of whether the NDI is toggled (second, Third aspect).
  • the controller 210 When the controller 210 receives another DCI indicating the same HARQ process as the DCI and indicating that the transport channel is transmitted on the physical uplink shared channel, the controller 210 is based on the NDI in the DCI. Then, it may be determined whether or not the NDI in the other DCI is toggled (second and third aspects).
  • the controller 210 uses the physical uplink shared channel on the transformer. Whether or not the NDI in the other DCI is toggled may be determined based on the NDI in the latest DCI indicating that the port channel is transmitted (second and third aspects).
  • the controller 210 When the controller 210 receives the DCI indicating that the transport channel is transmitted on the physical uplink shared channel, the same HARQ process as the DCI is assigned to the physical uplink shared channel on which the transport channel is not transmitted. It may be assumed that it does not exist (the fourth mode).
  • the control unit 210 may ignore at least one of the NDI field and the HPN field in DCI indicating that the transport channel is not transmitted on the physical uplink shared channel (sixth aspect).
  • each functional block may be realized by using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.) and may be implemented using these multiple devices.
  • the functional block may be implemented by combining the one device or the plurality of devices with software.
  • the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting (notifying), notifying (communicating), forwarding (forwarding), configuring (reconfiguring), allocating (allocating, mapping), assigning, etc.
  • a functional block (configuration unit) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the implementation method is not particularly limited.
  • the base station, the user terminal, and the like may function as a computer that performs the process of the wireless communication method of the present disclosure.
  • FIG. 10 is a diagram illustrating an example of a 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 terms such as a device, a circuit, a device, a section, and a unit can be read as each other.
  • the hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
  • processor 1001 For example, only one processor 1001 is shown, but there may be multiple processors. Further, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or by using another method.
  • 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 causing a predetermined software (program) to be loaded onto hardware such as the processor 1001 and the memory 1002, the processor 1001 performs calculation and communication via the communication device 1004. Is controlled, and at least one of reading and writing of data in the memory 1002 and the storage 1003 is controlled.
  • a predetermined software program
  • the processor 1001 operates an operating system to control the entire computer, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the control unit 110 (210) and the transmission/reception unit 120 (220) described above may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, and the like 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 similarly for other functional blocks.
  • the memory 1002 is a computer-readable recording medium, and for example, at least Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other appropriate storage media. It may be configured by one.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 may store an executable program (program code), a software module, etc. for implementing the wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, and/or other suitable storage medium May be configured by The storage 1003 may be called an auxiliary storage device.
  • a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, and/or other suitable storage medium May be configured by
  • the storage 1003
  • the communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 for example, realizes at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. May be included.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission/reception unit 120 (220) and the transmission/reception antenna 130 (230) described above may be realized by the communication device 1004.
  • the transmitter/receiver 120 (220) may be physically or logically separated from the transmitter 120a (220a) and the receiver 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 receives 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 performs output to the outside.
  • the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses for each device.
  • the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), etc. It may be configured to include hardware, and part or all of each functional block may be realized by using the hardware. For example, the 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
  • CMOS complementary metal-oxide-semiconductor
  • CC component carrier
  • a radio frame may be composed of one or a plurality of periods (frames) in the time domain.
  • Each of the one or more periods (frames) forming the radio frame may be referred to as a subframe.
  • a subframe may be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (for example, 1 ms) that does not depend on the numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • the numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and radio frame configuration. , At least one of a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like.
  • a slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may include multiple minislots. Each minislot may be composed of one or more symbols in the time domain. The minislot may also be called a subslot. Minislots may be configured with fewer symbols than slots.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a 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.
  • Radio frame, subframe, slot, minislot, and symbol all represent the time unit for signal transmission. Radio frames, subframes, slots, minislots, and symbols may have different names corresponding to them. It should be noted that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI. That is, at least one of the subframe and the 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 the TTI may be called a slot, a minislot, etc. instead of a subframe.
  • TTI means, for example, a minimum time unit of scheduling in wireless communication.
  • a base station performs scheduling to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) to each user terminal in units of TTI.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit of a channel-encoded data packet (transport block), code block, codeword, or the like, or may be a processing unit of scheduling, link adaptation, or the like.
  • the time interval for example, the number of symbols
  • the transport block, code block, codeword, etc. may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling.
  • the number of slots (the number of mini-slots) forming the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called 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.
  • a TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a 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 more continuous subcarriers in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
  • the number of subcarriers included in the RB may be determined based on numerology.
  • the RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may be configured by one or a plurality of resource blocks.
  • One or more RBs are physical resource blocks (Physical RB (PRB)), subcarrier groups (Sub-Carrier Group (SCG)), resource element groups (Resource Element Group (REG)), PRB pairs, RBs. It may be called a pair or the like.
  • PRB Physical RB
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • a resource block may be composed of one or more resource elements (Resource Element (RE)).
  • RE resource elements
  • 1 RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth Part (may be called partial bandwidth etc.) represents a subset of consecutive common RBs (common resource blocks) for a certain neurology in a certain carrier. Good.
  • the common RB may be specified by the index of the RB based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within the BWP.
  • BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP for UL UL BWP
  • BWP for DL DL BWP
  • one or more BWPs may be set in one carrier.
  • At least one of the configured BWPs may be active, and the UE does not have to expect to send and receive a given signal/channel outside the active BWP.
  • “cell”, “carrier”, and the like in the present disclosure may be read as “BWP”.
  • the structure of the radio frame, subframe, slot, minislot, symbol, etc. described above is merely an example.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, and included in RBs The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.
  • the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented.
  • the radio resource may be indicated by a predetermined index.
  • the names used for parameters and the like in the present disclosure are not limited names in any respect. Further, the mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements are not limiting in any way. ..
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of
  • Information and signals can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer.
  • 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. Information input/output, signals, etc. may be overwritten, updated, or added. The output information, signal, etc. may be deleted. The input information, signal, etc. may be transmitted to another device.
  • a specific location for example, memory
  • Information input/output, signals, etc. may be overwritten, updated, or added.
  • the output information, signal, etc. may be deleted.
  • the input information, signal, etc. may be transmitted to another device.
  • notification of information is not limited to the aspect/embodiment described in the present disclosure, and may be performed using another method.
  • notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), upper layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (Master Information Block (MIB)), system information block (System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof May be implemented 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 also be called 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 called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
  • CE MAC Control Element
  • the notification of the predetermined information is not limited to the explicit notification, and may be implicitly (for example, by not issuing the notification of the predetermined information or another information). May be carried out).
  • the determination may be performed by a value represented by 1 bit (0 or 1), or may be performed by a boolean value represented by true or false. , May be performed by comparison of numerical values (for example, comparison with a predetermined value).
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • the software uses at least one of wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) , Servers, or other remote sources, these wired and/or wireless technologies are included within the definition of transmission media.
  • Network may mean a device (eg, a base station) included in the network.
  • precoding “precoding”, “precoder”, “weight (precoding weight)”, “pseudo-collocation (Quasi-Co-Location (QCL))”, “Transmission Configuration Indication state (TCI 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”, and “panel” are interchangeable. Can be used for
  • Base Station BS
  • Wireless Base Station Wireless Base Station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission Point (TP)", “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
  • Cell Cell
  • femto cell femto cell
  • pico cell femto cell
  • a base station can accommodate one or more (eg, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being defined by a base station subsystem (for example, a small indoor base station (Remote Radio Head (RRH))) to provide communication services.
  • a base station subsystem for example, a small indoor base station (Remote Radio Head (RRH))
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to part or all of the coverage area of a base station and/or a base station subsystem providing communication services in this coverage.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station is 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. , 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.
  • the base station and the mobile station may be a device mounted on the mobile body, the 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).
  • At least one of the base station and the mobile station also 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 replaced by the user terminal.
  • the communication between the base station and the user terminal is replaced with communication between a plurality of user terminals (eg, 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.
  • the user terminal 20 may have the function of the base station 10 described above.
  • the words such as “up” and “down” may be replaced with the words corresponding to the terminal-to-terminal communication (for example, “side”).
  • the uplink channel and the downlink channel may be replaced with the side channel.
  • the user terminal in the present disclosure may be replaced by the base station.
  • the base station 10 may have the function of the user terminal 20 described above.
  • the operation supposed to be performed by the base station may be performed by its upper node in some cases.
  • various operations performed for communication with a terminal include a base station and one or more network nodes other than the base station (for example, Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. are conceivable, but not limited to these) or a combination of these is clear.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect/embodiment described in the present disclosure may be used alone, in combination, or may be switched according to execution. Further, the order of the processing procedure, sequence, flowchart, 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 this disclosure present elements of the various steps in a sample order, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • Future Radio Access FAA
  • New-Radio Access Technology RAT
  • NR New Radio
  • NX New radio access
  • FX Future generation radio access
  • GSM Global System for Mobile communications
  • CDMA2000 CDMA2000
  • Ultra Mobile Broadband UMB
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • Ultra-WideBand (UWB), Bluetooth (registered trademark), a system using any other suitable wireless communication method, and a next-generation system extended based on these may be applied.
  • a plurality of systems may be combined and applied (for example, a combination of LTE or LTE-A and 5G).
  • the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase “based on” means both "based only on” and “based at least on.”
  • references to elements using designations such as “first”, “second”, etc. used in this disclosure does not generally limit the amount or order of those elements. These designations may be used in this 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 employed or that the first element must precede the second element in any way.
  • determining may encompass a wide variety of actions.
  • judgment means “judging", “calculating”, “computing”, “processing”, “deriving”, “investigating”, “searching” (looking up, search, inquiry) ( For example, it may be considered to be a “decision” for a search in a table, database or another data structure), ascertaining, etc.
  • “decision (decision)” includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), access ( Accessing) (e.g., accessing data in memory) and the like may be considered to be a “decision.”
  • judgment (decision) is considered to be “judgment (decision)” such as resolving, selecting, choosing, choosing, establishing, establishing, and comparing. Good. That is, “determination (decision)” may be regarded as “determining (decision)” an action.
  • the “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, the nominal maximum transmission power (the nominal UE maximum transmit power), or the rated maximum transmission power (the maximum transmission power). It may mean rated UE maximum transmit power).
  • connection refers to any direct or indirect connection or coupling between two or more elements. And can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the connections or connections between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
  • radio frequency domain microwave Regions
  • electromagnetic energy having wavelengths in the light (both visible and invisible) region, etc. can be used to be considered “connected” or “coupled” to each other.
  • 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”.
  • the terms “remove”, “coupled” and the like may be construed similarly 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 d'utilisateur selon un mode de réalisation de la présente invention comprend : une unité de réception qui reçoit des informations de commande de liaison descendante (DCI) indiquant qu'un canal de transport ne sera pas transmis par un canal partagé de liaison montante physique ; et une unité de commande qui utilise soit un nouvel identifiant de données (NDI) dans les DCI en tant que base pour commander ou ignore le NDI et commande le stockage en mémoire du canal de transport associé au même processus de demande de répétition automatique hybride (HARQ) en tant que canal partagé de liaison montante physique. De cette manière, il est possible de commander la retransmission du canal de transport.
PCT/JP2019/006767 2019-02-22 2019-02-22 Terminal utilisateur et procédé de communication sans fil Ceased WO2020170419A1 (fr)

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WO2022077481A1 (fr) * 2020-10-16 2022-04-21 Oppo广东移动通信有限公司 Procédé et appareil de transmission de canal
JP2023545010A (ja) * 2020-10-02 2023-10-26 レノボ・シンガポール・プライベート・リミテッド 送信仮説に基づくチャネル状態情報の報告

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JP2018519692A (ja) * 2015-05-14 2018-07-19 インテル アイピー コーポレイション リッスンビフォートークを用いる無競合物理アップリンク共有制御チャネル（ｐｕｓｃｈ）送信

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JP2023545010A (ja) * 2020-10-02 2023-10-26 レノボ・シンガポール・プライベート・リミテッド 送信仮説に基づくチャネル状態情報の報告
WO2022077481A1 (fr) * 2020-10-16 2022-04-21 Oppo广东移动通信有限公司 Procédé et appareil de transmission de canal

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