WO2023276163A1 - 端末及び通信方法 - Google Patents
端末及び通信方法 Download PDFInfo
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- WO2023276163A1 WO2023276163A1 PCT/JP2021/025221 JP2021025221W WO2023276163A1 WO 2023276163 A1 WO2023276163 A1 WO 2023276163A1 JP 2021025221 W JP2021025221 W JP 2021025221W WO 2023276163 A1 WO2023276163 A1 WO 2023276163A1
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- pucch
- carrier
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- base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
Definitions
- the present invention relates to a terminal and communication method in a wireless communication system.
- NR New Radio
- NR New Radio
- 5G various radio technologies and network architectures are being studied in order to meet the requirements of realizing a throughput of 10 Gbps or more and keeping the delay in the radio section to 1 ms or less (for example, Non-Patent Document 1).
- PUCCH Physical Uplink Control Channel
- URLLC Ultra-Reliable and Low Latency Communications
- PUCCH carrier switching is being studied as a method of reducing the latency of HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment) feedback in a TDD (Time Division Duplex) scheme (for example, Non-Patent Document 2).
- 3GPP TS 38.300 V16.4.0 (2020-12) 3GPP TSG RAN Meeting #88e, RP-201310, Electronic meeting, June 29-July 3, 2020
- a PUCCH resource is configured in a primary cell, a primary secondary cell group cell, or a PUCCH secondary cell.
- a terminal could not transmit PUCCH except from a primary cell, a primary secondary cell group cell, or a PUCCH secondary cell. Which cell should be used to transmit PUCCH is defined in advance, and it was difficult to flexibly change it.
- the present invention has been made in view of the above points, and aims to improve the flexibility of settings related to transmission of uplink control channels in a wireless communication system.
- a receiving unit that receives control information and data from a base station, a control unit that determines a carrier for transmitting an uplink control channel based on the control information, and the data on the determined carrier and a transmission unit configured to transmit information related to retransmission control of the uplink control channel to the base station via the uplink control channel, wherein the control unit selects one of all configured carriers as the uplink control channel
- a terminal is provided that determines as a carrier to transmit a .
- FIG. 1 is a diagram for explaining an example (1) of a wireless communication system according to an embodiment of the present invention
- FIG. FIG. 2 is a diagram for explaining example (2) of a wireless communication system according to an embodiment of the present invention
- 4 is a flow chart for explaining an example of PUCCH transmission according to an embodiment of the present invention
- FIG. 4 is a diagram showing an example (1) of PUCCH transmission according to the embodiment of the present invention
- FIG. 4 is a diagram showing an example (2) of PUCCH transmission according to the embodiment of the present invention
- FIG. 4 is a diagram showing an example (3) of PUCCH transmission in the embodiment of the present invention
- FIG. 4 is a diagram showing an example (4) of PUCCH transmission according to the embodiment of the present invention
- FIG. 5 is a diagram showing an example (5) of PUCCH transmission according to the embodiment of the present invention
- FIG. 6 is a diagram showing an example (6) of PUCCH transmission according to the embodiment of the present invention
- FIG. 10 is a diagram showing an example (7) of PUCCH transmission according to the embodiment of the present invention
- FIG. 4 is a diagram showing an example of MAC-CE in an embodiment of the present invention
- FIG. 10 is a diagram showing an example (8) of PUCCH transmission according to the embodiment of the present invention
- FIG. 10 is a diagram showing an example (9) of PUCCH transmission in the embodiment of the present invention
- FIG. 4 is a diagram showing an example (1) of PUCCH carrier switching according to an embodiment of the present invention
- FIG. 4 is a diagram showing an example (2) of PUCCH carrier switching according to an embodiment of the present invention
- FIG. 4 is a diagram showing an example (3) of PUCCH carrier switching according to an embodiment of the present invention
- FIG. 4 is a diagram showing an example of disabling PUCCH carrier switching according to an embodiment of the invention
- FIG. 4 is a diagram showing an example (1) of PUCCH transmission power control according to the embodiment of the present invention
- FIG. 4 is a diagram showing an example (2) of PUCCH transmission power control in the embodiment of the present invention
- FIG. 4 is a diagram showing an example (3) of PUCCH transmission power control in the embodiment of the present invention
- FIG. 4 is a diagram showing an example (4) of PUCCH transmission power control in the embodiment of the present invention
- FIG. 5 is a diagram showing an example (5) of PUCCH transmission power control in the embodiment of the present invention; It is a figure which shows the example of the spatial relationship in embodiment of this invention.
- FIG. 6 is a diagram showing an example (6) of PUCCH transmission power control in the embodiment of the present invention;
- FIG. 4 is a diagram showing an example (1) of UCI multiplexing according to the embodiment of the present invention;
- FIG. 4 is a diagram showing an example (2) of UCI multiplexing in the embodiment of the present invention;
- FIG. 10 is a diagram showing an example (3) of UCI multiplexing in the embodiment of the present invention;
- FIG. 4 is a diagram showing an example (4) of UCI multiplexing in the embodiment of the present invention;
- FIG. 10 is a diagram showing an example (5) of UCI multiplexing in the embodiment of the present invention
- FIG. 4 is a diagram showing an example (1) of HARQ-ACK offsets according to the embodiment of the present invention
- FIG. 4 is a diagram showing an example (2) of HARQ-ACK offsets according to the embodiment of the present invention
- FIG. 4 is a diagram showing an example (3) of HARQ-ACK offsets according to the embodiment of the present invention
- FIG. 4 is a diagram showing an example (4) of HARQ-ACK offsets according to the embodiment of the present invention
- FIG. 5 is a diagram showing an example (5) of HARQ-ACK offsets according to the embodiment of the present invention
- FIG. 5 is a diagram showing an example (5) of HARQ-ACK offsets according to the embodiment of the present invention
- FIG. 6 is a diagram showing an example (6) of HARQ-ACK offsets in the embodiment of the present invention. It is a figure showing an example of functional composition of base station 10 in an embodiment of the invention.
- 2 is a diagram showing an example of the functional configuration of terminal 20 according to the embodiment of the present invention;
- FIG. 2 is a diagram showing an example of hardware configuration of base station 10 or terminal 20 according to an embodiment of the present invention;
- existing technology may be used as appropriate.
- the existing technology is, for example, existing NR or LTE, but is not limited to existing NR or LTE.
- FIG. 1 is a diagram for explaining example (1) of a wireless communication system according to an embodiment of the present invention.
- a wireless communication system according to an embodiment of the present invention includes a base station 10 and terminals 20, as shown in FIG. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example and there may be more than one.
- the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
- a physical resource of a radio signal is defined in the time domain and the frequency domain.
- the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks.
- a TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.
- the base station 10 can perform carrier aggregation (CA) in which multiple cells (multiple CCs (component carriers)) are bundled and communicated with the terminal 20 .
- CA carrier aggregation
- multiple cells multiple CCs (component carriers)
- carrier aggregation one PCell (Primary Cell) and one or more SCells (Secondary Cell) are used.
- the base station 10 transmits a synchronization signal, system information, etc. to the terminal 20.
- Synchronization signals are, for example, NR-PSS and NR-SSS.
- System information is transmitted, for example, on NR-PBCH or PDSCH, and is also called broadcast information.
- the base station 10 transmits control signals or data to the terminal 20 on DL (Downlink) and receives control signals or data from the terminal 20 on UL (Uplink).
- control channels such as PUCCH (Physical Uplink Shared Channel) and PDCCH (Physical Downlink Control Channel) is called a control signal
- PUSCH Physical Uplink Shared Channel
- PDSCH Physical Downlink Shared Channel
- the terminal 20 is a communication device with a wireless communication function, such as a smartphone, mobile phone, tablet, wearable terminal, or M2M (Machine-to-Machine) communication module. As shown in FIG. 1 , the terminal 20 receives control signals or data from the base station 10 on the DL and transmits control signals or data to the base station 10 on the UL, thereby performing various functions provided by the wireless communication system. Use communication services. Note that the terminal 20 may be called UE, and the base station 10 may be called gNB.
- FIG. 2 is a diagram for explaining example (2) of the wireless communication system according to the embodiment of the present invention.
- FIG. 2 shows a configuration example of a radio communication system when dual connectivity (DC) is performed.
- a base station 10A serving as a master node (MN: Master Node) and a base station 10B serving as a secondary node (SN: Secondary Node) are provided.
- the base station 10A and the base station 10B are connected to the core network 30 respectively.
- Terminal 20 can communicate with both base station 10A and base station 10B.
- MCG master cell group
- SCG secondary cell group
- an MCG is composed of one PCell and 0 or more SCells
- PSCell Primary SCG Cell
- SCell or PSCell may be described as SpCell (Special Cell).
- dual connectivity may be a communication method using two communication standards, and any communication standards may be combined.
- the combination may be either NR and 6G standard or LTE and 6G standard.
- dual connectivity may be a communication method using three or more communication standards, and may be called by other names different from dual connectivity.
- the processing operations in the present embodiment may be executed in the system configuration shown in FIG. 1, may be executed in the system configuration shown in FIG. 2, or may be executed in a system configuration other than these. .
- the PUCCH resource is set to PCell, PSCell or PUCCH-SCell. Terminals could not transmit PUCCH except on PCell, PSCell or PUCCH-SCell. Which cell should be used to transmit PUCCH is defined in advance, and it was difficult to flexibly change it.
- PUCCH group 1 it was possible to transmit PUCCH only on CC0, and it was not possible to transmit PUCCH on CC1.
- PUCCH group 2 it was possible to transmit PUCCH only on CC2 and not on CC3.
- PUCCH-SCell cannot be set in intra-band CA, it has been difficult to flexibly change which CC is used to transmit PUCCH in intra-band.
- CCs for transmitting PUCCH may be flexibly selected, and it may be specified on which CC the PUCCH is transmitted.
- PUCCH carrier switching based on dynamic notification by DCI (Downlink Control Information) that schedules PUCCH may be supported.
- PUCCH carrier switching based on semi-static configuration may be supported.
- PUCCH carrier switching may mean switching a carrier, CC, or cell for transmitting PUCCH.
- the semi-static configuration may be based on the PUCCH cell timing pattern configured by RRC (Radio Resource Control), or PUCCH carrier switching between cells with different newerologies or subcarrier spacings may be supported. good.
- a PUCCH cell may be a cell capable of transmitting PUCCH.
- the maximum number of PUCCH cells may be defined. Also, dynamic configuration and semi-static configuration may be combined and applied to PUCCH carrier switching. Also, PUCCH carrier switching and SPS (Semi-persistent) HARQ-ACK deferral may be integrated and applied.
- SPS Semi-persistent
- FIG. 3 is a flowchart for explaining an example of PUCCH transmission according to the embodiment of the present invention.
- the terminal 20 receives DCI and PDSCH from the base station 10 .
- the terminal 20 determines PUCCH for transmitting HARQ-ACK corresponding to the received PDSCH.
- the terminal 20 may determine the cell or carrier for transmitting the PUCCH, the resource for transmitting the PUCCH, and the transmission power for transmitting the PUCCH based on the control information received from the base station 10 .
- the control information may be, for example, RRC, MAC-CE and/or DCI.
- RRC, MAC-CE and DCI may be replaced with each other.
- the terminal 20 transmits the determined PUCCH to the base station 10 .
- the base station 10 may indicate the PUCCH transmission destination CC using RRC, MAC-CE (Medium Access Control-Control Element), or DCI.
- Terminal 20 may transmit PUCCH on the indicated CC.
- PUCCH#1 transmitted by PCell or PSCell and PUCCH#2 transmitted by PUCCH-SCell may be switched by RRC, MAC-CE or DCI.
- FIG. 4 is a diagram showing an example (1) of PUCCH transmission according to the embodiment of the present invention.
- switching of CCs transmitting PUCCH may be indicated by RRC, MAC-CE and/or DCI, without being limited to PCell, PSCell or PUCCH-SCell.
- a CC that transmits PUCCH may be indicated by RRC, MAC-CE and/or DCI.
- a predetermined one or a plurality of CC lists including some CCs are selected or set in advance, and among the CCs included in the selected or set CC list, RRC, MAC - A CC that transmits PUCCH may be indicated by CE and/or DCI.
- one or more predetermined CC lists including some CCs may be selected or set based on predetermined rules.
- the predetermined rule may include a list of a predetermined number of CCs starting with the smallest CCID.
- the predetermined number may be specified by the specification, may be set by a higher layer, or may be notified from the terminal 20 to the base station 10 by a UE capability report.
- one or a plurality of predetermined CC lists including some CCs among all set CCs may be set by a higher layer.
- the maximum number of CCs that can be set per CC list may be notified from the terminal 20 to the base station 10 by a UE capability report.
- the degree of congestion of resources used by UEs differs for each CC, so resource distribution is possible. Also, since the TDD setting may differ for each CC, the PUCCH can be transmitted with more flexible timing.
- FIG. 5 is a diagram showing an example (2) of PUCCH transmission according to the embodiment of the present invention.
- the PUCCH CCs that collectively transmit UCI may be indicated or selected by MAC-CE and/or DCI from predetermined CC candidates, eg, the first CC list shown in FIG. Reducing signaling overhead and reducing UE complexity, as the first CC list can be configured or defined to limit candidate CCs that can be indicated by MAC-CE and/or DCI. can be done.
- the terminal 20 may collectively transmit the UCIs of all CCs on the PUCCH.
- the all CCs may be all CCs including SpCell and SCell, or may be all CCs within the PUCCH cell group.
- FIG. 6 is a diagram showing an example (3) of PUCCH transmission according to the embodiment of the present invention. As shown in FIG. 6, different CCs may have different TDD settings. When the slot indicated as HARQ timing is DL, if UL exists in another CC in the slot, by transmitting HARQ-ACK in the other CC, it is possible to reduce the HARQ delay more than before. and the URLLLC performance can be improved.
- the CC that transmits PUCCH is You may switch to SCell#1.
- the unusable condition may be, for example, that it is a DL slot, that the UL symbol of PUCCH cannot be used in a special subframe, that it is a UL slot but has already been assigned to another channel, and the like. .
- the CC that transmits PUCCH is preset by RRC, or by searching for a CC that can be used by terminal 20, even if there is no instruction for PUCCH carrier switching by MAC-CE or DCI Even if there is, it is possible to switch the CC that transmits the PUCCH.
- the PUCCH may be transmitted in the same slot as the slot indicated by the HARQ feedback timing indicator or in a slot that at least partially overlaps in the case of different SCSs. If multiple CCs are available, the CCs may be pre-defined or pre-configured with priority. For example, PUCCH may be transmitted with priority given to a smaller CC index. Candidates of CCs that transmit PUCCH to be switched may be set in advance by higher layers. This makes it possible to prevent PUCCH from being transmitted in CCs that the terminal 20 does not want to transmit.
- FIG. 7 is a diagram showing an example (4) of PUCCH transmission according to the embodiment of the present invention.
- FIG. 8 is a diagram showing an example (5) of PUCCH transmission according to the embodiment of the present invention.
- the terminal 20 may switch the CC that transmits the PUCCH.
- terminal 20 may change the slot for transmitting HARQ-ACK. good.
- FIG. 7 is an example of changing to an earlier available slot in the time domain
- FIG. 8 is an example of changing to a later available slot in the time domain.
- the terminal 20 may not assume a case where there are no other available CCs.
- the base station 10 instructs the terminal 20 on which CC to transmit PUCCH by RRC, MAC-CE and/or DCI
- the base station 10 and the terminal 20 first determine the CC on which PUCCH is transmitted, and then A slot for transmitting the PUCCH may be determined.
- the base station 10 indicates to the terminal 20 which CC to transmit PUCCH by RRC, MAC-CE and/or DCI
- the base station 10 and the terminal 20 first determine the slot for transmitting PUCCH, and then A CC that transmits PUCCH may be determined.
- FIG. 9 is a diagram showing an example (6) of PUCCH transmission according to the embodiment of the present invention.
- the terminal 20 may transmit HARQ-ACK in the slot and CC in which the PUCCH can be transmitted the earliest after a predetermined time has elapsed after receiving the PDSCH.
- HARQ-ACK may mean HARQ feedback and may include ACK, positive acknowledgment or NACK, negative acknowledgment.
- the UE may not have some or all of the HARQ feedback timing indicator fields in DCI format 1_0, DCI format 1_1 and DCI format 1_2 if the behavior is configured from higher layers.
- HARQ-ACK of PDSCH scheduled by DCI in which the HARQ feedback timing indicator field does not exist may transmit HARQ-ACK in the slot and CC in which PUCCH can be transmitted earliest after elapse of a predetermined time after receiving PDSCH. .
- HARQ feedback delay is minimized and signaling such as HARQ feedback timing indicator is not required, so DCI overhead can be reduced.
- the terminal 20 transmits PUCCH in SCell #1, which can be transmitted in the nearest slot after the lapse of a predetermined time after receiving the PDSCH.
- priority among CCs may be defined or set in advance. For example, a CC with a smaller CC index may be preferentially used for PUCCH transmission.
- candidates for the CC to which the PUCCH is switched may be set in advance by a higher layer. This makes it possible to prevent PUCCH from being transmitted in CCs that the terminal 20 does not want to transmit.
- the base station 10 may indicate or select a CC for transmitting PUCCH to the terminal 20 using DCI.
- a CC that transmits PUCCH may be indicated using a predetermined field of DCI.
- a new CC indication field may be defined to indicate the CC that transmits the PUCCH.
- a new CC indication field may be defined in some or all of DCI format 1_0, DCI format 1_1 and DCI format 1_2, which are DCIs for scheduling DL.
- Table 1 is an example of the new CC indication field.
- the CC that transmits the PUCCH is designated by the DCI codepoint.
- Table 1 shows an example of a 2-bit CC indication field.
- the CC index associated with each DCI codepoint may be signaled by RRC or MAC-CE.
- a CC that transmits PUCCH may be indicated by an existing DCI field. For example, it may be indicated by a PRI (PUCCH resource indicator) field.
- PRI PUCCH resource indicator
- Table 2 is an example of indicating a CC that transmits PUCCH using the PRI field.
- each PUCCH resource may be associated with a CC that transmits the PUCCH.
- a destination CC associated with each PUCCH resource may be configured by higher layers.
- the existing DCI field may be used to indicate the CC that transmits the PUCCH.
- a CC that transmits PUCCH may be indicated using a carrier indicator field (CIF).
- CIF may be present if PUCCH carrier switching is configured, regardless of whether PDSCH is cross-carrier scheduled.
- the base station 10 may use the CIF to instruct the terminal 20 on which CC to transmit the PUCCH.
- a CC on which PDSCH is scheduled and a CC on which PUCCH is transmitted may be indicated using a common CIF.
- the CC on which the PDSCH is scheduled may be indicated using the CIF, and the CC transmitting the PUCCH may be indicated by the method 1) or 2) above.
- the CIF may be extended, the first CIF may be used to indicate the CC on which the PDSCH is scheduled, and the second CIF may be used to indicate the CC transmitting the PUCCH.
- FIG. 10 is a diagram showing an example (7) of PUCCH transmission according to the embodiment of the present invention.
- HARQ-ACKs corresponding to multiple PDSCHs triggered or scheduled by multiple DCIs are transmitted on the PUCCH, it may be set or defined in advance which DCI indicates which CC to transmit the PUSCH to use.
- a CC (CC0 in FIG. 10) that transmits PUCCH may be determined based on the last DCI in the time and frequency directions.
- FIG. 11 is a diagram showing an example of MAC-CE in the embodiment of the present invention.
- the base station 10 may indicate to the terminal 20 the CC on which PUCCH is to be transmitted by MAC-CE.
- MAC-CE may be defined to indicate the CC that transmits PUCCH.
- Terminal 20 may transmit PUCCH on the CC indicated by the MAC-CE.
- a cell transmitting PUCCH may be indicated by one relevant MAC-CE per cell group, or a cell transmitting PUCCH may be indicated by one relevant MAC-CE per UE.
- FIG. 12 is a diagram showing an example (8) of PUCCH transmission according to the embodiment of the present invention.
- terminal 20 may use PUCCH resources of CCs that transmit PUCCH indicated by MAC-CE and/or DCI, as shown in FIG.
- the terminal 20 may use the PUCCH resource of the scheduled cell indicated by the information indicating the CC that transmits the PRI or PUCCH.
- FIG. 13 is a diagram showing an example (9) of PUCCH transmission according to the embodiment of the present invention.
- the terminal 20 may use the PUCCH resource configured in the CC that received the PRI or the DCI that indicates information indicating the CC that transmits the PUCCH.
- the terminal 20 may use the PUCCH resource of the scheduling cell that indicates information indicating the CC that transmits the PRI or PUCCH.
- the terminal 20 may use the PUCCH resource of the scheduling cell that indicates information indicating the CC that transmits the PRI or PUCCH.
- transmitting PUCCH scheduled from multiple CCs as shown in FIG. may
- the terminal 20 may use the PUCCH resource allocated to the CC that received the PDSCH scheduled by the last DCI.
- the PUCCH-config may be set for each BWP (Bandwidth Part).
- CC may be replaced with “BWP in CC”.
- PUCCH carrier switching may be read as "instructing a CC that transmits PUCCH by RRC, MAC-CE and/or DCI".
- slot and sub-slot may be read interchangeably.
- SUL Supplemental Uplink
- SUL Supplemental Uplink
- Whether or not the SUL is included in the target CC for PUCCH carrier switching may be reported from the terminal 20 to the base station 10 using the UE capability report.
- the embodiment of the present invention may be applied only to terminals 20 that have reported UE capabilities shown in 1) and/or 2) below.
- UE capability to indicate whether or not to support PUCCH carrier switching For example, it may be a UE capability indicating whether RRC, MAC-CE and/or DCI indicates whether the CC to transmit PUCCH is indicated. Also, it may be a UE capability indicating whether or not a CC for transmitting PUCCH is instructed by MAC-CE. Also, it may be a UE capability indicating whether or not a CC for transmitting PUCCH is instructed in DCI.
- the number of CCs to which PUCCH carrier switching is switched It may be the maximum number of CCs that can be set per CC list to which PUCCH carrier switching is switched.
- the CC to which PUCCH carrier switching is switched may be set as one or more NR carrier types below.
- the terminal 20 may report a carrier type on which PUCCH transmission is possible, and the PUCCH carrier may be switched only to that carrier type.
- the one or more NR carrier types are ⁇ FR1 licensed TDD (fr1-NonSharedTDD-r16), FR1 unlicensed TDD (fr1-SharedTDD-r16), FR1 licensed FDD (fr1-NonSharedFDD-r16), FR2 (fr2-r16) ⁇ may be.
- the one or more NR carrier types may be ⁇ FR1-NonSharedTDD, FR1-SharedTDD, FR1-NonSharedFDD, FR2 ⁇ .
- the application timing (activation timing) of the indication of the CC to transmit the PUCCH may be specified. For example, the time from when a CC to transmit PUCCH is indicated by RRC, MAC-CE and/or DCI to when PUCCH carrier switching is actually applied may be defined.
- the base station 10 and the terminal 20 need to have a common understanding of the CC that transmits PUCCH.
- the base station 10 can recognize that the instruction is not valid. can.
- PUCCH carrier switching may be enabled or disabled.
- An instruction for a CC to transmit PUCCH may be called an activation command, and an activation command for validating the instruction may be defined separately from the instruction.
- a deactivation command may also be defined to invalidate the indication.
- FIG. 14 is a diagram showing an example (1) of PUCCH carrier switching according to the embodiment of the present invention.
- the assumption of the CC to transmit PUCCH may be switched.
- the predetermined time may be, for example, 3 ms later, or may be until the start of the next slot after 3 ms have elapsed.
- the MAC-CE may indicate a CC that transmits PUCCH only with the MAC-CE, or the MAC-CE may indicate a CC list including multiple CCs, and the DCI may indicate one CC list. CC may be indicated.
- FIG. 15 is a diagram showing an example (2) of PUCCH carrier switching according to the embodiment of the present invention. As shown in FIG. 15, the assumption of the CC transmitting PUCCH may be switched before PUCCH/PUSCH transmission in which ACK/NACK for DCI indicating the CC transmitting PUCCH is transmitted.
- FIG. 16 is a diagram showing an example (3) of PUCCH carrier switching according to the embodiment of the present invention. As shown in FIG. 16, after a predetermined period of time has passed since ACK for DCI indicating the CC to transmit PUCCH is transmitted, the assumption of the CC to transmit PUCCH may be switched. The predetermined time may be, for example, 3 ms later, or may be until the start of the next slot after 3 ms have elapsed.
- deactivation timing may be specified. For CCs that transmit PUCCHs that have been activated in the past, the CCs that transmit PUCCHs that were activated in the past may be deactivated when the CCs that transmit PUCCH are next activated.
- FIG. 17 is a diagram showing an example of disabling PUCCH carrier switching according to the embodiment of the present invention.
- a disable command may be defined, and PUCCH carrier switching may be disabled for terminals 20 that receive the disable command.
- the invalidation command may be notified by MAC-CE or may be indicated by DCI. It may be disabled after a predetermined time or a predetermined period of time after receiving an enable command or after a CC instructs to transmit PUCCH with MAC-CE and /DCI. As shown in FIG. 17, it may fall back to transmitting PUCCH on the PCell, PSCell or PUCCH-SCell during the invalidation period.
- the predetermined time may be, for example, 3 ms later, or may be until the start of the next slot after 3 ms have elapsed.
- the instruction of the CC that transmits PUCCH shown in FIG. 16 is DCI indicating invalidation, it is assumed that the assumption of the CC that transmits PUCCH is switched after a predetermined time has elapsed since the ACK for the DCI was transmitted. good too.
- the predetermined time may be, for example, 3 ms later, or may be until the start of the next slot after 3 ms have elapsed.
- PUCCH power control is set by pucch-PowerControl included in PUCCH-Config, which is an RRC information element, and PUCCH spatial relation included in PUCCH resource.
- PUCCH-Config which is an RRC information element
- PUCCH spatial relation included in PUCCH resource.
- a plurality of sets of P0, ⁇ , and path loss RS may be set in pucch-PowerControl, and an ID indicating one of the sets may be indicated in PUCCH spatial relation.
- the parameters for PUCCH power control set in the CC (or BWP) that transmits PUCCH may be used to determine PUCCH transmission power.
- the parameters may be pucch-PowerControl included in PUCCH-Config and PUCCH spatial relation included in PUCCH resource.
- FIG. 18 is a diagram showing an example (1) of PUCCH transmission power control according to the embodiment of the present invention.
- terminal 20 may use the PUCCH power control parameters of the CC transmitting PUCCH indicated by MAC-CE and/or DCI, as shown in FIG.
- the terminal 20 may use the PUCCH power control parameter of the scheduled cell indicated by the information indicating the CC that transmits the PRI or PUCCH.
- FIG. 19 is a diagram showing an example (2) of PUCCH transmission power control according to the embodiment of the present invention.
- the terminal 20 may use the PUCCH power control parameter set to the CC that received the PRI or the DCI indicating the information indicating the CC that transmits the PUCCH. good.
- the terminal 20 may use the PUCCH power control parameter of the scheduling cell that indicates information indicating the CC that transmits the PRI or PUCCH.
- transmitting PUCCH scheduled from multiple CCs as shown in FIG. may be used.
- the terminal 20 may use the PUCCH power control parameters assigned to the CC that received the PDSCH scheduled by the last DCI.
- FIG. 20 is a diagram showing an example (3) of PUCCH transmission power control according to the embodiment of the present invention.
- the terminal 20 may reset the TPC (Transmission Power Control) command cumulative value or set the value to 0.
- the TPC command accumulated value of PUCCH in CC0 may be different from the TPC command accumulated value of PUCCH in CC1 because the frequency and propagation path are different.
- FIG. 21 is a diagram showing an example (4) of PUCCH transmission power control according to the embodiment of the present invention.
- the terminal 20 may accumulate the TPC command accumulated value before and after executing PUCCH carrier switching or before and after being instructed.
- FIG. 22 is a diagram showing an example (5) of PUCCH transmission power control according to the embodiment of the present invention.
- the cumulative value of CL-PC may be held for each CC.
- a TPC command when instructed for the PUCCH resource of CC0, it may be held as an accumulated value of the TPC command for the PUCCH of CC0. may be held as an accumulated value of TPC commands of PUCCH.
- the PUCCH of CC1 is not transmitted. Thereafter, when CC1 is designated as the CC to transmit PUCCH, PUCCH may be transmitted using the cumulative value of TPC commands accumulated in CC1.
- FIG. 23 is a diagram showing an example of spatial relationships in the embodiment of the present invention. As shown in FIG. 23, when transmitting to one base station 10, different beams, that is, different spatial relations, result in different path losses. Also, when transmitting to two base stations 10, the path loss is different. Therefore, the terminal 20 can hold two cumulative CL-PC values.
- PUCCH closedLoopIndexes when different PUCCH closedLoopIndexes are set between PUCCH resources before and after PUCCH carrier switching, it may be considered that the PUCCH closedLoopIndex is switched along with PUCCH carrier switching.
- closedLoopIndex and the like are examples of TPC parameters, and other RRC parameters applied to PUCCH power control such as P0, ⁇ values, PL-RS, etc. are set in terminal 20 in the same manner as closedLoopIndex. good too.
- TPC parameters associated with the switching destination PUCCH resource may be applied by the same mechanism.
- FIG. 25 is a diagram showing an example (1) of UCI multiplexing according to the embodiment of the present invention. As shown in FIG. 25 , when transmitting multiple UCIs in the same slot or subslot is indicated by the HARQ feedback timing indicator field, the multiple UCIs are multiplexed and transmitted on the same PUCCH resource. may Hereinafter, "slot" may be replaced with "subslot”.
- PUCCH carrier switching is dynamically performed in consideration of the numerology or subcarrier spacing (SCS) of the CC that transmits the PUCCH.
- SCS subcarrier spacing
- FIG. 26 is a diagram showing an example (2) of UCI multiplexing according to the embodiment of the present invention.
- CC0 and CC1 have different SCSs and the CC that transmits PUCCH has a smaller SCS, two UCIs are not transmitted in the same slot.
- CC0 instructs HARQ-ACK transmission in slot #n
- CC1 instructs HARQ-ACK transmission in slot #m.
- PUCCH may be transmitted in slot #n of CC0.
- FIG. 27 is a diagram showing an example (3) of UCI multiplexing according to the embodiment of the present invention.
- CC0 and CC1 have different SCSs and the CC that transmits PUCCH has a smaller SCS, two UCIs are not transmitted in the same slot.
- CC0 instructs HARQ-ACK transmission in slot #n
- CC1 instructs HARQ-ACK transmission in slot #m+1.
- PUCCH may be transmitted in slot #n of CC0.
- FIG. 28 is a diagram showing an example (4) of UCI multiplexing according to the embodiment of the present invention.
- CC0 and CC1 have different SCSs and the CC that transmits PUCCH has a larger SCS, two UCIs are not transmitted in the same slot.
- CC0 instructs HARQ-ACK transmission in slot #n
- CC1 instructs HARQ-ACK transmission in slot #m.
- PUCCH may be transmitted in slot #m of CC1.
- FIG. 29 is a diagram showing an example (5) of UCI multiplexing according to the embodiment of the present invention.
- CC0 and CC1 have different SCSs and the CC that transmits PUCCH has a larger SCS, two UCIs are not transmitted in the same slot.
- CC0 instructs HARQ-ACK transmission in slot #n
- CC1 instructs HARQ-ACK transmission in slot #m+1.
- PUCCH may be transmitted in slot #m+1 of CC1.
- the conditions under which UCIs are multiplexed on the same PUCCH resource may be the conditions shown in 1)-3) below.
- UCIs may be multiplexed if at least some of the slots or subslots of the PUCCH resource overlap in the PUCCH CC at the indicated time. It is assumed that the CC of PUCCH when PUCCH resources were indicated in the past and the CC that actually transmits PUCCH are different when PUCCH carrier switching occurs, but terminal 20 indicates or triggered PUCCH resources.
- the SCS and slot or sub-slot of the current PUCCH CC may be used to determine conditions under which UCI is multiplexed on the same PUCCH resource and to determine UCI transmission timing.
- the UCI may be multiplexed.
- the UCI may be transmitted unmultiplexed if it does not overlap with the slot or subslot of the CC transmitting the PUCCH.
- terminal 20 determines whether or not to multiplex PUCCH based on whether PUCCH slots or subslots overlap by at least one symbol in the time domain.
- FIG. 30 is a diagram showing an example (1) of HARQ-ACK offsets according to the embodiment of the present invention.
- the timing of transmitting HARQ-ACK is indicated by the offset k of the PDSCH reception slot.
- UCI of each CC is transmitted on PCell, PSCell, or PUCCH-SCell, and which CC's UCI is transmitted on which CC's PUCCH may be determined in advance. That is, the CC transmitting PUCCH may not be updated by RRC, MAC-CE or DCI.
- the k value may be counted in the same SpCell slot as the PDSCH reception slot.
- the UCI of all CCs is transmitted by PUCCH of SpCell, so the timing of transmitting HARQ-ACK of all CCs is the slot of HARQ-ACK in the CC that transmits SpCell, ie PUCCH, or A subslot offset may be indicated.
- the timing of the HARQ-ACK of the PCell's PDSCH scheduled in the PCell's DCI may be indicated by the HARQ-ACK slot or sub-slot offset in the PCell.
- the timing of the HARQ-ACK of the PDSCH of the SCell scheduled in the DCI of the SCell may be indicated by the slot or subslot offset of the HARQ-ACK in the PCell.
- the CC transmitting PUCCH may be updated with RRC, MAC-CE and/or DCI.
- the timing of transmitting HARQ-ACK is indicated as a slot or subslot in which CC.
- the slot or subslot may be indicated in the HARQ Feedback Timing Indicator field.
- the offset value may be determined without considering PUCCH carrier switching.
- FIG. 31 is a diagram showing an example (2) of HARQ-ACK offsets in the embodiment of the present invention. For example, if PUCCH-SCell is not configured, as shown in FIG. 31, assuming that PUCCH is transmitted in PCell or PSCell, that is, SpCell in each CC, the slot or sub-slot offset for transmitting HARQ-ACK is indicated. may be
- terminal 20 may transmit PUCCH in narrow SCS slots in which slots of large SCS overlap even partially.
- the slots may be specified in the same way.
- HARQ-ACK when PUCCH-SCell is configured, regarding HARQ-ACK of PCell or PSCell, assuming that PUCCH is transmitted on PCell or PSCell, even if a slot or sub-slot for transmitting HARQ-ACK is indicated good.
- HARQ-ACK for CCs other than PCell and PSCell, a slot or subslot for transmitting HARQ-ACK may be indicated assuming that PUCCH is transmitted on PUCCH-SCell.
- FIG. 32 is a diagram showing an example (3) of HARQ-ACK offsets in the embodiment of the present invention.
- a slot or subslot for transmitting HARQ-ACK assuming a PUCCH destination CC may be indicated.
- the PUCCH transmission destination CC may be determined by a method based on PUCCH switching in the embodiment of the present invention.
- a slot or sub-slot for transmitting HARQ-ACK assuming a PUCCH destination CC at any one of DCI reception timing, PDSCH reception timing, and PUCCH transmission timing that triggered UCI may be indicated.
- the point in time may be specified in the specification, may be set in a higher layer, or may be indicated in the UE capability report.
- FIG. 33 is a diagram showing an example (4) of HARQ-ACK offsets in the embodiment of the present invention.
- the UCI of each CC may indicate a slot or subslot in which HARQ-ACK is transmitted assuming the CC that received the PDSCH.
- a slot or subslot to transmit HARQ-ACK may be indicated, given the CC that received the DCI that triggered the UCI.
- FIG. 34 is a diagram showing an example (5) of HARQ-ACK offsets according to the embodiment of the present invention.
- the timing of transmitting HARQ-ACK is determined, and the slot that overlaps with the timing Or you may transmit PUCCH by a subslot.
- FIG. 34 shows an example of the timing of transmitting HARQ-ACK when the CC that transmits PUCCH is updated from SCell#2 to SpCell. The counting of k values is done in slots in SCell#2.
- FIG. 35 is a diagram showing an example (6) of HARQ-ACK offsets according to the embodiment of the present invention. As shown in FIG. 35, assuming a CC that actually transmits PUCCH, timing for transmitting HARQ-ACK may be determined, and PUCCH may be transmitted in slots or subslots that overlap with the timing. FIG. 35 shows an example of the timing of transmitting HARQ-ACK when the CC that transmits PUCCH is updated from SCell#2 to SpCell. The counting of k values is done in slots in the SpCell.
- PUCCH carrier switching (RRC, MAC-CE and / or DCI to be instructed CC to transmit PUCCH) is limited to the terminal 20 is set, for SCell other than SpCell and PUCCH-SCell PUCCH- Config may be set. However, it may be limited to SCells corresponding to CCs included in a CC list that is a transition destination of PUCCH carrier switching set in a higher layer.
- PUCCH-Config may be set to a maximum of one additional SCell, PUCCH-Config may be configured for a maximum of one serving cell per FR.
- terminal 20 can flexibly set the transition destination carrier for PUCCH carrier switching. Also, it is possible to clarify PUCCH transmission power control when PUCCH carrier switching is performed. Also, it is possible to clarify the timing of transmitting HARQ-ACK when PUCCH carrier switching is performed even if the SCSs are different.
- the base stations 10 and terminals 20 contain the functionality to implement the embodiments described above. However, each of the base station 10 and the terminal 20 may have only the functions proposed in any of the embodiments.
- FIG. 36 is a diagram showing an example of the functional configuration of the base station 10.
- the base station 10 has a transmitting section 110, a receiving section 120, a setting section 130, and a control section 140.
- the functional configuration shown in FIG. 36 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.
- the transmitting unit 110 and the receiving unit 120 may be called a communication unit.
- the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal.
- the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher layer information from the received signals.
- the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DL data, etc. to the terminal 20 . Also, the transmission unit 110 transmits the setting information and the like described in the embodiment.
- the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads them from the storage device as necessary.
- the control unit 140 performs overall control of the base station 10 including control related to signal transmission/reception, for example. It should be noted that the functional unit related to signal transmission in control unit 140 may be included in transmitting unit 110 , and the functional unit related to signal reception in control unit 140 may be included in receiving unit 120 . Also, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.
- FIG. 37 is a diagram showing an example of the functional configuration of the terminal 20.
- the terminal 20 has a transmitting section 210, a receiving section 220, a setting section 230, and a control section 240.
- the functional configuration shown in FIG. 37 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.
- the transmitting unit 210 and the receiving unit 220 may be called a communication unit.
- the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
- the receiving unit 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal. Also, the transmitting unit 210 transmits HARQ-ACK, and the receiving unit 220 receives the setting information and the like described in the embodiment.
- the setting unit 230 stores various types of setting information received from the base station 10 by the receiving unit 220 in the storage device, and reads them from the storage device as necessary.
- the setting unit 230 also stores preset setting information.
- the control unit 240 performs overall control of the terminal 20 including control related to signal transmission/reception. It should be noted that the functional unit related to signal transmission in control unit 240 may be included in transmitting unit 210 , and the functional unit related to signal reception in control unit 240 may be included in receiving unit 220 . Also, the transmitting section 210 and the receiving section 220 may be called a transmitter and a receiver, respectively.
- each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't
- a functional block (component) that performs transmission is called a transmitting unit or transmitter.
- the implementation method is not particularly limited.
- the base station 10, the terminal 20, etc. may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 38 is a diagram illustrating an example of a hardware configuration of base station 10 and terminal 20 according to an embodiment of the present disclosure.
- the base station 10 and terminal 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. good too.
- the term "apparatus” can be read as a circuit, device, unit, or the like.
- the hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
- Each function of the base station 10 and the terminal 20 is performed by the processor 1001 performing calculations and controlling communication by the communication device 1004 by loading predetermined software (programs) onto hardware such as the processor 1001 and the storage device 1002. or by controlling at least one of data reading and writing in the storage device 1002 and the auxiliary storage device 1003 .
- the processor 1001 for example, operates an operating system and controls the entire computer.
- the processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
- CPU central processing unit
- the control unit 140 , the control unit 240 and the like described above may be implemented by the processor 1001 .
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the program a program that causes a computer to execute at least part of the operations described in the above embodiments is used.
- control unit 140 of base station 10 shown in FIG. 36 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 .
- the control unit 240 of the terminal 20 shown in FIG. 37 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001.
- FIG. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.
- the storage device 1002 is a computer-readable recording medium, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be configured.
- the storage device 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the storage device 1002 can store executable programs (program code), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
- the storage medium described above may be, for example, a database, server, or other suitable medium including at least one of storage device 1002 and secondary storage device 1003 .
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD).
- FDD frequency division duplex
- TDD time division duplex
- the transceiver may be physically or logically separate implementations for the transmitter and receiver.
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (for example, display, speaker, LED lamp, etc.) that outputs to the outside. Note that 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 storage device 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 between devices.
- the base station 10 and the terminal 20 include hardware such as microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), and FPGAs (Field Programmable Gate Arrays). , and part or all of each functional block may be implemented by the hardware.
- processor 1001 may be implemented using at least one of these pieces of hardware.
- a receiving unit that receives control information and data from a base station, and a control unit that determines a carrier for transmitting an uplink control channel based on the control information and a transmission unit configured to transmit information related to retransmission control of the data on the determined carrier to the base station via the uplink control channel, wherein the control unit selects among all the set carriers
- a terminal is provided that determines one of the carriers as a carrier for transmitting the uplink control channel.
- terminal 20 can flexibly set the transition destination carrier for PUCCH carrier switching. That is, in a radio communication system, it is possible to improve the flexibility of settings related to transmission of uplink control channels.
- the control unit may determine a carrier for transmitting the uplink control channel from carriers included in a list among all configured carriers.
- the control unit determines, as a carrier for transmitting the uplink control channel, the earliest carrier capable of transmitting the uplink control channel after a certain period of time has passed since the receiving unit received the control information and the data. may With this configuration, terminal 20 can flexibly set the carrier to which PUCCH carrier switching transitions, thereby reducing signaling.
- the control unit may determine a carrier for transmitting the uplink control channel based on the last control information in time and frequency directions. .
- terminal 20 can flexibly set the carrier to which PUCCH carrier switching transitions.
- the control unit may determine the carrier indicated by the control information as a carrier for transmitting the uplink control channel.
- terminal 20 can flexibly set the carrier to which PUCCH carrier switching transitions.
- a receiving procedure for receiving control information and data from a base station a control procedure for determining a carrier for transmitting an uplink control channel based on the control information; a transmission procedure for transmitting information related to retransmission control of the data on the selected carrier to the base station via the uplink control channel; and transmitting the uplink control channel using one of all configured carriers.
- a communication method is provided in which a terminal executes a procedure for determining a carrier.
- terminal 20 can flexibly set the transition destination carrier for PUCCH carrier switching. That is, in a radio communication system, it is possible to improve the flexibility of settings related to transmission of uplink control channels.
- the operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the base station 10 and the terminal 20 have been described using functional block diagrams for convenience of explanation of processing, such devices may be implemented in hardware, software, or a combination thereof.
- the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are stored in random access memory (RAM), flash memory, read-only memory, respectively. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other appropriate storage medium.
- notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods.
- notification of information includes physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
- RRC signaling may also be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.
- Each aspect/embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system) system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark) )), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems and extended It may be applied to at least one of the next generation systems. Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).
- a specific operation performed by the base station 10 in this specification may be performed by its upper node in some cases.
- various operations performed for communication with terminal 20 may be performed by base station 10 and other network nodes other than base station 10 (eg, but not limited to MME or S-GW).
- base station 10 e.g, but not limited to MME or S-GW
- the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW).
- Information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.
- Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input/output information and the like can be overwritten, updated, or appended. The output information and the like may be deleted. The entered information and the like may be transmitted to another device.
- the determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), may be performed by a boolean value (Boolean: true or false), or may be performed by comparing numerical values (e.g. , comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the 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.) to website, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
- the channel and/or symbols may be signaling.
- a signal may also be a message.
- a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
- system and “network” used in this disclosure are used interchangeably.
- information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information.
- radio resources may be indexed.
- base station BS
- radio base station base station
- base station fixed station
- NodeB nodeB
- eNodeB eNodeB
- gNodeB gNodeB
- a base station can accommodate one or more (eg, three) cells.
- the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being associated with a base station subsystem (e.g., an indoor small base station (RRH:
- RRH indoor small base station
- the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems serving communication services in this coverage.
- MS Mobile Station
- UE User Equipment
- a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
- the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a user terminal.
- communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.)
- the terminal 20 may have the functions of the base station 10 described above.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be read as side channels.
- user terminals in the present disclosure may be read as base stations.
- the base station may have the functions that the above-described user terminal has.
- determining and “determining” used in this disclosure may encompass a wide variety of actions.
- “Judgement” and “determination” are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as “judged” or “determined”, and the like.
- "judgment” and “determination” are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment” or “decision” has been made.
- judgment and “decision” are considered to be “judgment” and “decision” by resolving, selecting, choosing, establishing, comparing, etc. can contain.
- judgment and “decision” may include considering that some action is “judgment” and “decision”.
- judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
- connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
- two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.
- the reference signal can also be abbreviated as RS (Reference Signal), and may also be called Pilot depending on the applicable standard.
- RS Reference Signal
- any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements can be employed or that the first element must precede the second element in any way.
- a radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of numerology.
- a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
- SCS subcarrier spacing
- TTI transmission time interval
- transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
- a slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
- a slot may be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.
- one subframe may be called a Transmission Time Interval (TTI)
- TTI Transmission Time Interval
- TTI Transmission Time Interval
- TTI Transmission Time Interval
- one slot or one minislot may be called a TTI.
- TTI Transmission Time Interval
- 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 Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each terminal 20
- TTI is not limited to this.
- a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the 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 called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
- a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
- the short TTI e.g., shortened TTI, etc.
- a TTI having the above TTI length may be read instead.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive 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 an RB may be determined based on numerology.
- the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long.
- One TTI, one subframe, etc. may each consist of one or more resource blocks.
- One or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. may be called.
- PRBs physical resource blocks
- SCGs sub-carrier groups
- REGs resource element groups
- PRB pairs RB pairs, etc. may be called.
- a resource block may be composed of one or more resource elements (RE: Resource Element).
- RE Resource Element
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a bandwidth part (which may also be called a bandwidth part) may represent a subset of contiguous common resource blocks (RBs) for a certain numerology on a certain carrier.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be configured for terminal 20 within one carrier.
- At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a given signal/channel outside the active BWP.
- “cell”, “carrier”, etc. in the present disclosure may be read as "BWP”.
- radio frames, subframes, slots, minislots and symbols described above are only examples.
- the number of subframes contained in a radio frame the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.
- CP cyclic prefix
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
- notification of predetermined information is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.
- base station 110 transmitting unit 120 receiving unit 130 setting unit 140 control unit 20 terminal 210 transmitting unit 220 receiving unit 230 setting unit 240 control unit 30 core network 1001 processor 1002 storage device 1003 auxiliary storage device 1004 communication device 1005 input device 1006 output device
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Abstract
Description
PUCCHグループ1:CC0=PCell、CC1=SCell
PUCCHグループ2:CC2=PUCCH-SCell、CC3=SCell
2)PUCCHを送信するキャリアがセミスタティック(Semi-static)に指示される場合。例えば、HARQフィードバックタイミングインジケータで指示されるPUCCHを送信するスロットでPUCCHが送信できない場合のみPUCCHキャリアスイッチングを行う場合。
2)PUCCHを送信するキャリアがセミスタティックに指示される場合。例えば、HARQフィードバックタイミングインジケータで指示されるPUCCHを送信するスロットでPUCCHが送信できない場合のみPUCCHキャリアスイッチングを行う場合。
次に、これまでに説明した処理及び動作を実行する基地局10及び端末20の機能構成例を説明する。基地局10及び端末20は上述した実施例を実行する機能を含む。ただし、基地局10及び端末20はそれぞれ、実施例のうちのいずれかの提案の機能のみを備えることとしてもよい。
図36は、基地局10の機能構成の一例を示す図である。図36に示されるように、基地局10は、送信部110と、受信部120と、設定部130と、制御部140とを有する。図36に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。送信部110と受信部120とを通信部と呼んでもよい。
図37は、端末20の機能構成の一例を示す図である。図37に示されるように、端末20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図37に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。送信部210と受信部220とを通信部と呼んでもよい。
上記実施形態の説明に用いたブロック図(図36及び図37)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
以上、説明したように、本発明の実施の形態によれば、制御情報及びデータを基地局から受信する受信部と、上り制御チャネルを送信するキャリアを、前記制御情報に基づいて決定する制御部と、前記決定されたキャリアにおいて前記データの再送制御に係る情報を前記上り制御チャネルを介して前記基地局に送信する送信部とを有し、前記制御部は、設定されたすべてのキャリアのうちいずれかのキャリアを、前記上り制御チャネルを送信するキャリアとして決定する端末が提供される。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局10及び端末20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って基地局10が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従って端末20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
110 送信部
120 受信部
130 設定部
140 制御部
20 端末
210 送信部
220 受信部
230 設定部
240 制御部
30 コアネットワーク
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
Claims (6)
- 制御情報及びデータを基地局から受信する受信部と、
上り制御チャネルを送信するキャリアを、前記制御情報に基づいて決定する制御部と、
前記決定されたキャリアにおいて前記データの再送制御に係る情報を前記上り制御チャネルを介して前記基地局に送信する送信部とを有し、
前記制御部は、設定されたすべてのキャリアのうちいずれかのキャリアを、前記上り制御チャネルを送信するキャリアとして決定する端末。 - 前記制御部は、設定されたすべてのキャリアのうち、リストに含まれるキャリアの中から、前記上り制御チャネルを送信するキャリアを決定する請求項1記載の端末。
- 前記制御部は、前記受信部が前記制御情報及び前記データを受信した時点からある時間が経過した後、最も早く前記上り制御チャネルを送信可能なキャリアを前記上り制御チャネルを送信するキャリアとして決定する請求項1記載の端末。
- 前記制御部は、前記受信部が複数の制御情報及び複数のデータを受信した場合、時間及び周波数方向で最後となる制御情報に基づいて、前記上り制御チャネルを送信するキャリアを決定する請求項1記載の端末。
- 前記制御部は、前記制御情報により指示されたキャリアを前記上り制御チャネルを送信するキャリアとして決定する請求項1記載の端末。
- 制御情報及びデータを基地局から受信する受信手順と、
上り制御チャネルを送信するキャリアを、前記制御情報に基づいて決定する制御手順と、
前記決定されたキャリアにおいて前記データの再送制御に係る情報を前記上り制御チャネルを介して前記基地局に送信する送信手順と、
設定されたすべてのキャリアのうちいずれかのキャリアを、前記上り制御チャネルを送信するキャリアとして決定する手順とを端末が実行する通信方法。
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