WO2022044276A1 - 端末、無線通信方法及び基地局 - Google Patents
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- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
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- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
Definitions
- This disclosure relates to terminals, wireless communication methods and base stations in next-generation mobile communication systems.
- LTE Long Term Evolution
- UMTS Universal Mobile Telecommunications System
- 3GPP Rel.10-14 LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
- a successor system to LTE for example, 5th generation mobile communication system (5G), 5G + (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 or later, etc.
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- NR New Radio
- one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) (multi-TRP) will use one or more panels (multi-panel) to make a terminal (multi-panel). It is being considered to perform DL transmission (for example, PDSCH transmission) to user terminal and User Equipment (UE).
- TRP Transmission / Reception Point
- UE User Equipment
- repeated transmission is applied to a predetermined channel (for example, PDCCH).
- PDCCH a predetermined channel
- the terminal is scheduled by a receiving unit that receives a plurality of downlink control information transmitted by using a plurality of downlink control channels assigned to different time domains, and the plurality of downlink control information. It has a control unit that controls at least one of reception and transmission of the physical shared channel, and the control unit specifies when the contents of the timing-related information included in the plurality of downlink control information are the same. It is characterized in that at least one of the reception timing and the transmission timing of the physical shared channel is determined based on the timing-related information with the downlink control channel of the above as a time reference.
- communication can be appropriately performed even when repeated transmission is applied to DL channels transmitted from one or more TRPs.
- FIG. 1 is a diagram showing an example of schedule control of a physically shared channel based on PDCCH / DCI.
- FIG. 2A-2D is a diagram showing an example of a multi-TRP scenario.
- FIG. 3 is a diagram showing an example of PDCCH repeated transmission.
- FIG. 4 is a diagram showing an example of PDCCH repetitive transmission control in the second aspect.
- 5A and 5B are diagrams showing another example of PDCCH repetitive transmission control in the second aspect.
- 6A and 6B are diagrams showing another example of PDCCH repetitive transmission control in the second aspect.
- 7A and 7B are diagrams showing another example of PDCCH repetitive transmission control in the second aspect.
- FIG. 8 is a diagram showing an example of PDCCH repetitive transmission control according to the third aspect.
- FIG. 8 is a diagram showing an example of PDCCH repetitive transmission control according to the third aspect.
- FIG. 9 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 10 is a diagram showing an example of the configuration of a base station according to an embodiment.
- FIG. 11 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- FIG. 12 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- the resource allocation information of the time domain of the physical shared channel (at least one of PDSCH and PUSCH) is included in the downlink control information (DCI).
- the network eg, a base station
- utilizes a predetermined field contained in the DCI eg, the TDRA field
- the UE utilizes a predetermined field contained in the DCI to inform the UE of information about the time domain resource for which the physical shared channel scheduled in the DCI is scheduled.
- the information about the time domain resource indicates, for example, information indicating the offset between the DCI and the physically shared channel (for example, slot offset K0), information indicating the start symbol (for example, the start symbol S), and the length of the physically shared channel. It may contain at least one piece of information (eg, length L).
- Each bit information (or code point) notified in the TDRA field may be associated with a different time domain resource allocation candidate (or entry).
- a table for example, a TDRA table
- each bit information and time domain resource allocation candidates (K0, S, L) are associated with each other may be defined.
- the time domain resource allocation candidate may be predefined in the specification, or may be notified / set to the UE by higher layer signaling.
- the UE may determine a row index (entry number or entry index) in a given table based on the value of the TDRA field in the DCI (eg DCI format 1_0 / 1-1 / 1-1).
- the predetermined table contains information indicating a time offset (eg, slot offset K0) between the DCI and the PDSCH scheduled by the DCI, information indicating the mapping type of the PDSCH, the start symbol S of the PDSCH, and the time length L. May contain at least one of.
- the combination of the start symbol S and the time length L of the PDSCH may be referred to as a Start and Length Indicator (SLIV).
- SIV Start and Length Indicator
- the UE is in the time domain in which the PDSCH is scheduled based on the value of the predetermined field contained in the DCI and at least one of the slot offset K0 information, mapping type, start symbol S, symbol length L, and SLIV specified in the table. Resources may be determined (see Figure 1). The reference points of the start symbol S and the symbol length L may be controlled based on the start position (starting symbol) of the slot. Further, the start symbol S, the symbol length L, and the like may be defined according to the mapping type of PDSCH.
- the UE determines the slot in which the PDSCH is scheduled with the DCI (or PDCCH used for transmitting the DCI) as a reference point in the time domain. For example, when the UE receives the DCI that schedules the PDSCH in the slot #n, the number n of the slot, the subcarrier interval ⁇ PDSCH for the PDSCH, the subcarrier interval ⁇ PDCCH for the PDCCH, and at least the above time offset K0. Based on one, the slot for receiving the PDSCH (assigned to the PDSCH) may be determined.
- the UE determines the allocation of the PDSCH for the resource allocation information (for example, SLIV) specified in the TDRA field with reference to the start point of the slot to which the PDSCH is allocated.
- the reference point may be referred to as a reference point or a reference point.
- the UE may determine a row index (entry number or entry index) in a given table based on the value of the TDRA field in the DCI (eg DCI format 0_0 / 0_1 / 0_2).
- the predetermined table contains information indicating a time offset (eg, slot offset K2) between the DCI and the PUSCH scheduled by the DCI, information indicating the mapping type of the PUSCH, the start symbol S of the PUSCH, and the time length L. May contain at least one of.
- the combination of the start symbol S and the time length L of the PUSCH may be referred to as a Start and Length Indicator (SLIV).
- the UE is in the time domain in which the PUSCH is scheduled based on the value of the predetermined field contained in the DCI and at least one of the slot offset K2 information, the mapping type, the start symbol S, the symbol length L, and the SLIV specified in the table. Resources may be determined (see Figure 1). The reference points of the start symbol S and the symbol length L may be controlled based on the start position (starting symbol) of the slot. Further, the start symbol S, the symbol length L, and the like may be defined according to the mapping type of PDSCH.
- the UE determines the slot in which the PUSCH is scheduled with the DCI (or PDCCH used for transmitting the DCI) as a reference point in the time domain. For example, when the UE receives the DCI that schedules the PUSCH in the slot # n + 4, the slot number n + 4, the subcarrier interval ⁇ PDSCH for the PUSCH, the subcarrier interval ⁇ PDCCH for the PUCCH, and at least the above time offset K2. Based on one, the slot for transmitting the PUSCH (assigned to the PUSCH) may be determined.
- the UE determines the allocation of the resource allocation information (for example, SLIV) specified in the TDRA field based on the start point of the slot to which the PUSCH is allocated.
- the resource allocation information for example, SLIV
- Multi TRP In NR, it is considered that one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) perform DL transmission to the UE using one or more panels (multi-panel). Has been done. It is also being considered that the UE performs UL transmission to one or more TRPs.
- TRP Transmission / Reception Point
- the plurality of TRPs may correspond to the same cell identifier (cell Identifier (ID)) or may correspond to different cell IDs.
- the cell ID may be a physical cell ID or a virtual cell ID.
- FIG. 2A-2D is a diagram showing an example of a multi-TRP scenario. In these examples, it is assumed that each TRP is capable of transmitting four different beams, but is not limited to this.
- FIG. 2A shows an example of a case (which may be called single mode, single TRP, etc.) in which only one TRP (TRP1 in this example) of the multi-TRPs transmits to the UE.
- the TRP1 transmits both a control signal (PDCCH) and a data signal (PDSCH) to the UE.
- PDCH control signal
- PDSCH data signal
- FIG. 2B shows a case where only one TRP (TRP1 in this example) of the multi-TRPs transmits a control signal to the UE, and the multi-TRP transmits a data signal (may be called a single master mode).
- TRP1 TRP1 in this example
- DCI Downlink Control Information
- FIG. 2C shows an example of a case (which may be called a master-slave mode) in which each of the multi-TRPs transmits a part of a control signal to the UE and the multi-TRP transmits a data signal.
- Part 1 of the control signal (DCI) may be transmitted in TRP1
- part 2 of the control signal (DCI) may be transmitted in TRP2.
- Part 2 of the control signal may depend on Part 1.
- the UE receives each PDSCH transmitted from the multi-TRP based on these DCI parts.
- FIG. 2D shows an example of a case (which may be called a multi-master mode) in which each of the multi-TRPs transmits a separate control signal to the UE and the multi-TRP transmits a data signal.
- a first control signal (DCI) may be transmitted in TRP1 and a second control signal (DCI) may be transmitted in TRP2.
- the UE receives each PDSCH transmitted from the multi-TRP based on these DCIs.
- the DCI is a single DCI (S-DCI, single). It may be called PDCCH).
- S-DCI single DCI
- PDCCH PDCCH
- M-DCI multiple PDCCH (multiple PDCCH)
- Non-Coherent Joint Transmission is being studied as a form of multi-TRP transmission.
- TRP1 modulation-maps the first codeword, layer-maps it, and transmits the first PDSCH to the first number of layers (for example, two layers) using the first precoding.
- TRP2 modulates and maps the second codeword, layer-maps the second codeword, and transmits the second PDSCH to the second number of layers (for example, the second layer) by using the second precoding.
- the plurality of PDSCHs (multi-PDSCHs) to be NCJT may be defined as partially or completely overlapping with respect to at least one of the time and frequency domains. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap at least one of the time and frequency resources.
- first PDSCH and second PDSCH may be assumed to be not quasi-co-located in a pseudo-collocation (Quasi-Co-Location (QCL)) relationship.
- the reception of the multi-PDSCH may be read as the simultaneous reception of PDSCHs that are not of a certain QCL type (for example, QCL type D).
- PDSCH transport block (TB) or codeword (CW) repetition (repetition) across multi-TRP.
- URLLC schemes URLLC schemes, eg, schemes 1, 2a, 2b, 3, 4
- SDM space division multiplexing
- FDM frequency division multiplexing
- RV redundant version
- the RV may be the same or different for the multi-TRP.
- the multi-PDSCH from the multi-TRP is time division multiplexing (TDM).
- TDM time division multiplexing
- the multi-PDSCH from the multi-TRP is transmitted within one slot.
- the multi-PDSCH from the multi-TRP is transmitted in different slots.
- NCJT using multi-TRP / panel may use high rank.
- Single DCI single PDCCH, eg, FIG. 2B
- multi-DCI multi-PDCCH, eg, multi-PDCCH, eg
- the maximum number of TRPs may be 2 for both single DCI and multi DCI.
- TCI Expansion of TCI is being considered for single PDCCH design (mainly for ideal backhaul).
- Each TCI code point in the DCI may correspond to one or two TCI states.
- the TCI field size is Rel. It may be the same as that of 15.
- PDCCH repetition PDCCH (or DCI) transmitted from one or more TRPs.
- PDCCH PDCCH
- DCI DCI transmitted from one or more TRPs.
- a plurality of PDCCHs (or DCIs) transmitted from one or more TRPs to schedule or send / receive one or more signals / channels.
- PDCCH / DCI to which repeated transmission is applied may be referred to as multi-PDCCH / multi-DCI.
- the repeated transmission of PDCCH may be read as repeated PDCCH, multiple transmissions of PDCCH, multiple PDCCH transmissions, or multiple PDCCH transmissions.
- the multi-PDCCH / multi-DCI may be transmitted from different TRPs.
- the multi-PDCCH / DCI may be multiplexed by time division multiplexing (TDM) / frequency division multiplexing (FDM) / spatial multiplexing (SDM).
- TDM time division multiplexing
- FDM frequency division multiplexing
- SDM spatial multiplexing
- the one or more physical sharing channels may be, for example, the same (or one) physical sharing channel, or a plurality of physical sharing channels scheduled in the same time domain.
- how to control the schedule control (for example, the content notified by each DCI, the reference point at the time of scheduling, etc.) becomes a problem.
- the UE issues a time-related instruction (for example, the same value) for each PDCCH / DCI.
- the problem is how to apply / interpret and control the schedule.
- the UE will use the time relationship of each PDCCH / DCI.
- the problem is how to apply / interpret the instructions (for example, different values) to control the schedule.
- FIG. 3 shows an example of a case where PDCCH is repeatedly transmitted (or arranged) in slots # n to # n + 1, respectively.
- the PDCCH (or control resource set) arranged in each slot may be arranged in the entire time domain (for example, all symbols) in the slot, or may be arranged in a part of the time domain (for example, continuous or discontinuous). It may be placed in the symbol of the part).
- the schedule of the physical shared channel may be controlled based on the timing-related information (for example, time domain resource allocation information) included in each PDCCH transmitted in different time domains (here, different slots).
- the PDCCHs transmitted in different time domains may be configured to schedule the same transport block (or a physically shared channel carrying the same transport block).
- timing-related information for example, time domain resource allocation information
- the present inventors consider how to set the time-related information included in each PDCCH / DCI or interpret the time-related information in the UE when the schedule is performed using a plurality of PDCCH / DCI. Then, I came up with the embodiment of this embodiment.
- a / B may be read as at least one of A and B
- a / B / C may be read as at least one of A, B and C.
- the information regarding PDCCH repeated transmission may be transmission conditions / transmission parameters applied to PDCCH repeated transmission.
- the transmission condition / transmission parameter applied to the PDCCH repetition transmission is at least one of the PDCCH repetition number (for example, PDCCH repetition number), the time interval to which the PDCCH repetition is applied, and the interval / offset between each PDCCH in the PDCCH repetition transmission. May be.
- the PDCCH to which repeated transmission is applied may be transmitted from a plurality of TRPs, respectively.
- a different QCL (or TCI, beam) may be applied to the multi-PDCCH (or PDCCH transmitted from a different TRP).
- PDCCH repetitive transmission is applicable to the case of transmission from one or more TRPs.
- Information regarding PDCCH repeat transmission may be notified / set to the UE from the network (for example, a base station).
- Information regarding PDCCH repeated transmission may be notified / set to the UE based on at least one of the following options 1-1 to 1-2.
- Information regarding PDCCH repetitive transmission may be notified / set from the base station to the UE using higher layer signaling (eg, at least one of the RRC parameter and MAC CE).
- higher layer signaling eg, at least one of the RRC parameter and MAC CE.
- Information regarding PDCCH repetitive transmission may be dynamically notified from the base station to the UE by using downlink control information (for example, DCI).
- DCI downlink control information
- Information regarding PDCCH repetitive transmission may be notified using a new field set in DCI, or may be notified using a field set in an existing system.
- PDCCH repetitive transmission may be included in each PDCCH / DCI to which repetitive transmission is applied.
- the number of PDCCH repetitions included in each PDCCH / DCI may be the same value.
- the PDCCH repetition number included in each PDCCH / DCI may be set to a different value (for example, the remaining number of repetitions).
- the size of the field used for notification of information regarding repeated transmission may be determined based on the maximum number of PDCCH iterations.
- the UE may determine the maximum number of PDCCH iterations based on the capability information reported by the UE (eg, UE capability).
- the maximum number of repetitions of PDCCH may be notified / set from the base station to the UE by higher layer signaling or the like.
- the base station may use DCI to notify the UE of the number of PDCCH iterations actually applied.
- the size (or number of bits) of the field used for notification of the number of PDCCH iterations may be determined based on the maximum number of iterations of PDCCH notified / set by the upper layer signaling.
- Whether or not the notification of the number of PDCCH repetitions using DCI is applied may be set by a predetermined upper layer signaling.
- the UE assumes that the DCI has a PDCCH repeat count notification field when the predetermined upper layer signaling is set, and the PDCCH repeat count notification field exists in the DCI when the predetermined upper layer signaling is not set. You may assume that you will not.
- the UE when applying PDCCH repeated transmission, the UE appropriately grasps the transmission conditions / transmission parameters applied to PDCCH repeated transmission by notifying / setting the information regarding the PDCCH repeated transmission from the base station to the UE. Can be done.
- the same payload content may be the case where the values of all the fields included in each DCI are set to be the same. Alternatively, there may be a case where the values of some predetermined fields among the fields included in each DCI are set to be the same.
- the predetermined field may be a notification field for time-related information.
- the time-related information may be read as timing-related information, time-related instruction, or timing-related instruction (for example, timing-related indication).
- the predetermined field may be at least one of a time domain resource allocation (for example, time domain resource assignment) field and a HARQ-ACK feedback timing instruction (for example, PDSCH-to-HARQ feedback timing indicator) field.
- the UE is set to a specific time reference. Based on this, the time-related information (or timing-related information) contained in the DCI may be interpreted / applied.
- the time reference may be read as a timing reference, a reference timing, a reference point, a time reference point, a reference in the time domain, or a reference point in the time domain.
- the specific time reference may be a specific PDCCH (or a specific PDCCH transmission timing) among a plurality of PDCCHs that are repeatedly transmitted. For example, it may be the first PDCCH transmitted (or received), or the first PDCCH allocated in the time domain. The UE may use the first symbol of the PDCCH transmitted first as the time reference or the last symbol of the PDCCH as the time reference.
- the UE may use a signal / channel (eg, a physical share) scheduled for each DCI based on a particular time reference and a notification field of time-related information contained in each DCI (or at least one DCI).
- the time domain resource of the channel may be determined.
- the UE schedules the PDSCH to a slot (here, # n + 2) K0 away from a specific time reference (here, the transmission timing of PDCCH # 1 or DCI # 1 first transmitted (for example, slot # n)). It should be judged that it will be done.
- FIG. 4 shows a case where PDSCH is scheduled using multi-PDCCH / multi-DCI, but the present invention is not limited to this.
- the UE is pressed from a specific time reference (for example, the transmission timing of the first PDCCH # 1 or DCI # 1 (for example, slot # n)). It may be determined that the PUSCH is scheduled in the slot K2 away. Alternatively, it can be similarly applied to an operation in which a time domain (for example, transmission timing / reception timing) is determined with reference to PDCCH / DCI.
- a time domain for example, transmission timing / reception timing
- FIG. 4 shows a case where multi-PDCCH / multi-DCI are assigned to different slots (inter-slot PDCCH repetition), but the present invention is not limited to this.
- Multi-PDCCH / multi-DCI may be assigned to the same slot (eg, different sub-slots / mini-slots / symbols within the same slot).
- FIG. 5A shows a case where multi-PDCCH / multi-DCI are assigned in the same slot (intra-slot PDCCH repetition).
- PDCCH # 1 and PDCCH # 2 are assigned to different symbols in slot # n, and the slot offset K0 indicated by DCI # 1 transmitted by PDCCH # 1 and DCI # 2 transmitted by PDCCH # 2, respectively.
- the case where the values are the same (here, 2) is shown.
- the UE may interpret / apply the time-related information included in each DCI using a specific PDCCH (here, PDCCH # 1) as a time reference among a plurality of PDCCHs.
- PDCCH # 1 a specific PDCCH
- FIG. 5B shows a case where multi-PDCCH / multi-DCI are assigned in the same mini-slot (intra-mini-slot PDCCH repetition).
- the mini-slots may have a time interval composed of predetermined symbols (eg, 2, 3 or 7 symbols).
- the mini slot may be read as a sub slot.
- the minislot may be set as simply for a shorter period of time than the subslot.
- PDCCH # 1 and PDCCH # 2 are assigned to different symbols (for example, adjacent symbols) included in slot # n, and DCI # 1 transmitted by PDCCH # 1 and DCI # 2 transmitted by PDCCH # 2.
- slot offset K0 values indicated by the above are the same (here, 2) is shown.
- the UE may interpret / apply the time-related information included in each DCI using a specific PDCCH (here, PDCCH # 1) as a time reference among a plurality of PDCCHs.
- PDCCH # 1 a specific PDCCH
- the case where the PDCCH transmitted first is used as the time reference is shown, but the case is not limited to this.
- Another PDCCH eg, the last transmitted or last placed PDCCH in the time domain
- the UE may interpret / apply the time-related information based on the PDCCH transmitted last.
- the specific PDCCH / DCI as a time reference may be determined based on a predetermined parameter corresponding to each PDCCH (or CORESET of each PDCCH).
- the predetermined parameter may be at least one of a TRP index, a CORESET pool index, and a TCI state ID.
- the particular PDCCH / DCI may be the PDCCH / DCI corresponding to the smallest / largest TRP index (or CORESET pool index) of the repeatedly transmitted PDCCHs (eg, multi-PDCCH / multi-DCI). ..
- the specific PDCCH / DCI may be the PDCCH / DCI corresponding to the minimum / maximum TCI state ID among the repeatedly transmitted PDCCH (for example, multi-PDCCH / multi-DCI).
- the TCI state corresponding to the PDCCH / DCI may be the TCI state corresponding to the CORESET used for the transmission of the PDCCH / DCI. Further, when the CORESET pool index is set, the CORESET corresponding to the minimum / maximum CORESET pool index may be selected.
- the multi-PDCCH (or multi-DCI) to which the repeated transmission is applied may be set in association with each other (or between one or more predetermined transmission parameters) for the predetermined transmission parameters.
- the predetermined transmission parameter may be at least one of a control channel element (CCE), a resource element group (REG), a search space, a search space set, and CORESET.
- a predetermined transmission parameter may be set in association with a PDCCH that serves as a time reference (for example, the PDCCH that is transmitted first in repeated transmission) and another PDCCH.
- predetermined transmission parameters may be set based on the repetition order (or in association with the transmission order) among the transmission parameters of a plurality of PDCCHs to which the repetition is applied.
- the UE determines the transmission order of each PDCCH (for example, the PDCCH transmitted first) based on the information regarding the repetition of the PDCCH (for example, the number of repetitions, the repetition cycle, etc.) and the transmission parameters corresponding to each PDCCH. It becomes possible to do.
- the UE is configured to be able to recognize / grasp the PDCCH that serves as the time reference from other PDCCHs, so that even if the UE makes a mistake in detecting the PDCCH that serves as the time reference, the time included in each DCI is included.
- Related information (for example, the same value) can be appropriately interpreted / applied for transmission / reception.
- the transmission timing of each PDCCH may be limited.
- the transmission timing of each PDCCH may be controlled based on at least one of the following options 2-1 to 2-2.
- PDCCH repetitive transmissions (eg, TDM PDCCH repetitions) assigned to different time domains may be configured to not support inter-slot PDCCH repetitions (see FIG. 6A).
- at least one of the intra-slot PDCCH repetition (intra-slot PDCCH repetition) and the intra-mini-slot PDCCH repetition (intra-mini-slot PDCCH repetition) may be supported (see FIG. 6B).
- the PDCCH repeated transmission is applied in the same slot, the same slot is set as the time reference even if the UE mistakenly detects the PDCCH as the time reference and recognizes another PDCCH as the time reference.
- the PDCCH repetition (for example, TDM PDCCH repetition) assigned to different time domains may be configured to support only the intra-mini-slot PDCCH repetition (intra-mini-slot PDCCH repetition).
- the PDCCH repetitive transmission assigned to different time domains may be configured so that the inter-slot PDCCH repetition and the intra-slot PDCCH repetition are not supported.
- minislot level offsets are supported, the minislot level offset will be applied even if the UE mistakenly detects the time-based PDCCH and mistakenly recognizes other PDCCHs as time-based.
- the time domain resource of the physical shared channel can be properly determined.
- a field for determining the time-based PDCCH may be set in the DCI.
- a field may be added to each PDCCH to indicate whether the PDCCH is a time-based PDCCH (for example, whether it is the first PDCCH to be transmitted in repeated transmission).
- a 1-bit predetermined field is set, and when the predetermined field value is 1, it indicates that it is a PDCCH (or the first PDCCH) as a time reference, and when the predetermined field value is 0, the time is used. It may be shown that it is not a non-reference PDCCH (or the first PDCCH) (see FIG. 7A).
- a predetermined field indicating the order of transmission in the time direction in repeated transmission may be set in DCI.
- a 2-bit predetermined field is set, and when the predetermined field value is 00, it indicates that it is a time-based PDCCH (or the first PDCCH), and when the predetermined field value is 01, 2 Even if it indicates that it is the third PDCCH, it indicates that it is the third PDCCH when the predetermined field value is 10, and it indicates that it is the fourth PDCCH when the predetermined field value is 11. Good (see Figure 7B).
- FIG. 7B shows a case where a predetermined field is set with 2 bits, but the present invention is not limited to this.
- the size (or number of bits) of a given field may be determined based on the maximum number of repeat transmissions.
- the content of the time-related information notified by the DCI transmitted by each PDCCH is set to be the same, so that the overhead of the DCI can be reduced.
- the increase can be suppressed.
- the slot offset is set in association with another parameter (eg, start symbol S, length L) (eg, set corresponding to a DCI code point). In such a case, it is not necessary to increase the number of combinations of the slot offset and other parameters by setting the slot offset of each DCI to the same value.
- a third aspect describes a case where transmission of DCI (same DCI payload content) having different payload contents is supported / permitted by PDCCH repetitions transmitted in different time domains. That is, it corresponds to the case where different DCI payload contents are notified to the UEs by the multi-PDCCH.
- the different payload contents may be the case where the values of some predetermined fields among the fields included in each DCI are set to be the same.
- the predetermined field may be a notification field for time-related information (or timing-related information).
- the predetermined field may be at least one of a time domain resource allocation (for example, time domain resource assignment) field and a HARQ-ACK feedback timing instruction (for example, PDSCH-to-HARQ feedback timing indicator) field.
- the UE will perform each PDCCH. / For each DCI, the time-related information (or timing-related information) contained in the DCI may be interpreted / applied based on a different time reference.
- the UE is a signal scheduled in each DCI based on a notification field of time-related information included in the DCI transmitted in each PDCCH and a PDCCH (or PDCCH transmission timing) corresponding to each DCI.
- the time domain resource of the / channel eg, physical shared channel
- the value of the time-related information included in each DCI may be different.
- the actual timing (for example, scheduled timing) specified in the time-related information (for example, time domain resource allocation of the physical shared channel) included in each DCI may be the same.
- the UE may determine the position / timing at which the PDSCH is scheduled based on the PDCCH corresponding to each DCI.
- the slot offset 2 is specified by DCI # 1 transmitted by PDCCH # 1 assigned to slot # n
- the slot offset 1 is specified by DCI # 2 transmitted by PDCCH # 2 assigned to slot # n + 1. The case is shown.
- the UE determines that the PDSCH is scheduled in the slot 2 slots away from PDCCH # 1 (here, slot # n + 2) and the slot 1 slot away from PDCCH # 2 (here, slot # n + 2).
- the UE may assume that the same time resource (eg, slot) is designated by each DCI repeatedly transmitted on the PDCCH.
- FIG. 8 shows a case where PDSCH is scheduled using multi-PDCCH / multi-DCI, but the present invention is not limited to this.
- the UE may interpret / apply the time-related information contained in the DCI based on the timing of the PDCCH corresponding to each DCI.
- the slot level timing notification in slot # n is p
- the slot level timing notification in slot # n + 1 may be p-1.
- the slot level timing notification included in all DCIs transmitted in slot #n is the same (for example, all DCIs contain p). There may be.
- the subslot level timing notification included in all DCIs transmitted in subslot #m is the same (for example, all DCIs contain p). ) May be.
- the subslot level timing notification in the mini slot # r + 1 is p-. It may be 1.
- the same contents may be set in the fields other than the time-related information field (for example, the time domain resource allocation field) included in the DCI.
- the UE may assume that the values of other fields (eg, frequency domain resource allocation fields, etc.) other than the time-related information fields included in the repeatedly transmitted multi-DCI are set to be the same.
- the multi-PDCCH (or multi-DCI) to which the repeated transmission is applied may be set in association with each other (or between one or more predetermined transmission parameters) for the predetermined transmission parameters.
- the predetermined transmission parameter may be at least one of a control channel element (CCE), a resource element group (REG), a search space, a search space set, and CORESET.
- a predetermined field for determining the time-based PDCCH may be set in the DCI.
- a predetermined field may be added to each PDCCH indicating whether the PDCCH is a time-based PDCCH (for example, whether it is the first PDCCH to be transmitted in repeated transmission).
- a 1-bit predetermined field is set, and when the predetermined field value is 1, it indicates that it is a PDCCH (or the first PDCCH) as a time reference, and when the predetermined field value is 0, the time is used. It may be shown that it is not a non-reference PDCCH (or the first PDCCH).
- a predetermined field indicating the order of transmission in the time direction in repeated transmission may be set in DCI.
- a 2-bit predetermined field is set, and when the predetermined field value is 00, it indicates that it is a time-based PDCCH (or the first PDCCH), and when the predetermined field value is 01, 2 Even if it indicates that it is the third PDCCH, it indicates that it is the third PDCCH when the predetermined field value is 10, and it indicates that it is the fourth PDCCH when the predetermined field value is 11. good.
- each PDCCH / DCI contains the same DCI payload content (eg, at least time-related information). good.
- FDM frequency division multiplexing
- SDM spatial division multiplexing
- the UE may interpret / apply the time-related information (or timing-related instruction) contained in the multi-PDCCH / multi-DCI based on at least one of the following options 3-1 to 3-2. good.
- the UE may determine the time domain resource to be scheduled according to the time-related information notified by any of the PDCCH / DCI among the repeatedly transmitted PDCCH (eg, multi-PDCCH / multi-DCI).
- the UE may determine the time domain resource to be scheduled according to the time-related information notified by a specific PDCCH / DCI among the repeatedly transmitted PDCCCH (for example, multi-PDCCH / multi-DCI).
- the specific PDCCH / DCH may be the PDCCH / DCI having the minimum / maximum frequency index (or CCE index) among the PDCCHs (for example, multi-PDCCH / multi-DCI) that are repeatedly transmitted.
- the particular PDCCH / DCI may be the PDCCH / DCI corresponding to the smallest / largest TRP index (or CORESET pool index) of the repeatedly transmitted PDCCHs (eg, multi-PDCCH / multi-DCI). ..
- the specific PDCCH / DCI may be the PDCCH / DCI corresponding to the minimum / maximum TCI state ID among the repeatedly transmitted PDCCH (for example, multi-PDCCH / multi-DCI).
- the TCI state corresponding to the PDCCH / DCI may be the TCI state corresponding to the CORESET used for the transmission of the PDCCH / DCI. Further, when the CORESET pool index is set, the CORESET corresponding to the minimum / maximum CORESET pool index may be selected.
- the second aspect and the third aspect may be applied only to PDCCH repetition (TDM PDCCH repetition scheme) using TDM.
- the second aspect and the third aspect may be applied only to the TDM PDCCH repetition between slots (inter-slot) / intra-slot (intra-slot) / mini-slot (intra-mini-slot). ..
- the DAI may also include a Downlink Assignment Indicator (Index) (DAI) field. Further, the DAI field may be split into a counter DAI (counter DAI (cDAI)) and a total DAI (total DAI (tDAI)).
- Index Downlink Assignment Indicator
- cDAI counter DAI
- tDAI total DAI
- the counter DAI may indicate a counter value for downlink transmission (PDSCH, data, TB) scheduled within a predetermined period.
- the counter DAI in the DCI that schedules data within the predetermined period is the number counted first in the frequency domain (eg, in CC index order) and then in the time domain (in time index order) within the predetermined period. May be shown.
- the total DAI may indicate the total value (total number) of data scheduled within a predetermined period.
- the total DAI in the DCI that schedules data in a predetermined time unit (for example, PDCCH monitoring opportunity) within the predetermined period is by the predetermined time unit (also referred to as point, timing, etc.) within the predetermined period. It may indicate the total number of scheduled data.
- the problem is how to control (or interpret) the DAI field included in the DCI transmitted by each PDCCH.
- the UE will use the following options 4-1 to 4-2.
- the DAI field may be interpreted / applied based on at least one of.
- the DAI field in the repeating PDCCH may be determined based on a particular PDCCH (eg, the first PDCCH transmitted in the repeating). That is, the DAI field of each DCI is counted (or counted up) only in the first PDCCH (or DCI) and may not be counted in the other PDCCH.
- the count value in the first PDCCH / DCI may be set in the DCI field included in each DCI.
- the DAI included in each DCI may be 0 (even if it is not counted). good).
- the DAI field in the repeating PDCCH may be determined based on the last transmitted PDCCH in the repeating.
- the DCI field included in each DCI may be set to the count value in the last PDCCH / DCI. For example, when the number of repetitions is n, a value counted by at least n times of the number of repetitions may be set in the DCI field of each DCI.
- the UE may interpret / apply the DAI field based on at least one of the following options 5-1 to 5-2.
- ⁇ Option 5-1> The same value may be set for each DAI field in PDCCH / DCI to which repeated transmission is applied. In such cases, option 4-1 or option 4-2 may be applied.
- Different values may be set for the DAI field in the repeating PDCCH (or multi-DCI).
- the count control of the DAI field in each DCI may be controlled based on the combination of the serving cell and the PDCCH monitoring occasion. Alternatively, it may be controlled based on a combination of at least one serving cell and PDCCH monitoring occasion and a TRP index.
- each PDCCH / DCI is set to different values (and the time domain resource allocation fields are set to the same value)
- the UE will base the time on the DAI field (eg, the counter DAI).
- the reference PDCCH may be determined.
- the UE may report to the base station as UE capability information (UE capability) whether or not the PDCCH is repeatedly supported. For example, the UE may report to the base station whether or not it supports multiplex schemes (TDM / SDM / FDM) applicable to PDCCH iterations.
- TDM / SDM / FDM multiplex schemes
- the UE performs PDCCH repetition (TDM PDCCH repetition) transmitted in different time domains, inter-slot PDCCH repetition, intra-slot PDCCH repetition, and intra-mini-slot PDCCH. You may report to the base station which of the iterations is supported.
- the UE may also report the UE capability for the maximum number of iterations to the base station.
- the maximum number of repetitions may be set separately for a plurality of multiplexing methods (TDM / SDM / FDM), or may be set in common.
- the UE reports whether to support the case where the DCI payload contents are the same or the case where the DCI payload contents are different in the repeated PDCCH (for example, TDM PDCCH repetition between slots / in slots / in mini slots). You may.
- the UE may report to the base station whether or not it supports notification of the number of repetitions based on DCI.
- the base station may control repeated transmission of PDCCH based on the capability information reported by the UE. Further, the base station may notify / set the above-mentioned UE capability information to the UE by using higher layer signaling or the like.
- wireless communication system Wireless communication system
- communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
- FIG. 9 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
- the wireless communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs).
- MR-DC is a dual connectivity (E-UTRA-NR Dual Connectivity (EN-DC)) between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, and a dual connectivity (NR-E) between NR and LTE.
- E-UTRA-NR Dual Connectivity Evolved Universal Terrestrial Radio Access (E-UTRA)
- NR-E dual connectivity
- NE-DC -UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
- the base station (gNB) of NR is MN
- the base station (eNB) of LTE (E-UTRA) is SN.
- the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
- a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
- NR-NR Dual Connectivity NR-DC
- gNB NR base stations
- the wireless communication system 1 includes a base station 11 that forms a macrocell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macrocell C1 and forms a small cell C2 that is narrower than the macrocell C1. You may prepare.
- the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
- the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
- the user terminal 20 may be connected to at least one of a plurality of base stations 10.
- the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
- CA Carrier Aggregation
- DC dual connectivity
- CC Component Carrier
- Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
- the macrocell C1 may be included in FR1 and the small cell C2 may be included in FR2.
- FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR 2 may be in a frequency band higher than 24 GHz (above-24 GHz).
- the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
- the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- the base station 10 may be connected to the core network 30 via another base station 10 or directly.
- the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
- a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
- OFDM Orthogonal Frequency Division Multiplexing
- DL Downlink
- UL Uplink
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple. Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the wireless access method may be called a waveform.
- another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
- the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
- a downlink shared channel Physical Downlink Shared Channel (PDSCH)
- a broadcast channel Physical Broadcast Channel (PBCH)
- a downlink control channel Physical Downlink Control
- PDSCH Physical Downlink Control
- the uplink shared channel Physical Uplink Shared Channel (PUSCH)
- the uplink control channel Physical Uplink Control Channel (PUCCH)
- the random access channel shared by each user terminal 20 are used.
- Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
- User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
- User data, upper layer control information, and the like may be transmitted by the PUSCH.
- the Master Information Block (MIB) may be transmitted by the PBCH.
- Lower layer control information may be transmitted by PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
- DCI Downlink Control Information
- the DCI that schedules PDSCH may be called DL assignment, DL DCI, or the like, and the DCI that schedules PUSCH may be called UL grant, UL DCI, or the like.
- the PDSCH may be read as DL data, and the PUSCH may be read as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
- CORESET corresponds to a resource for searching DCI.
- the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
- One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
- One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set.
- the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
- channel state information (Channel State Information (CSI)
- delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
- scheduling request (Scheduling Request).
- Uplink Control Information including at least one of SR)
- the PRACH may transmit a random access preamble to establish a connection with the cell.
- downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" to the beginning of various channels.
- a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
- the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
- CRS Cell-specific Reference Signal
- CSI-RS Channel State Information Reference Signal
- DeModulation Demodulation reference signal
- Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
- SS, SSB and the like may also be called a reference signal.
- a measurement reference signal Sounding Reference Signal (SRS)
- a demodulation reference signal DMRS
- UL-RS Uplink Reference Signal
- UE-specific Reference Signal UE-specific Reference Signal
- FIG. 10 is a diagram showing an example of the configuration of a base station according to an embodiment.
- the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
- the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
- the functional block of the characteristic portion in the present embodiment is mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
- the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120.
- the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
- the transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
- the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
- the transmitter / receiver 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure. be able to.
- the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
- the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
- the transmitting / receiving antenna 130 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted. Processing (if necessary), inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-analog transformation may be performed, and the baseband signal may be output.
- channel coding may include error correction coding
- modulation modulation
- mapping mapping, filtering
- DFT discrete Fourier Transform
- IFFT inverse Fast Fourier Transform
- precoding coding
- transmission processing such as digital-analog transformation
- the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
- the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
- the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) for the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- the transmission / reception unit 120 may perform measurement on the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
- the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- Signal strength for example, Received Signal Strength Indicator (RSSI)
- propagation path information for example, CSI
- the measurement result may be output to the control unit 110.
- the transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10, etc., and user data (user plane data) for the user terminal 20 and a control plane. Data or the like may be acquired or transmitted.
- the transmission unit and the reception unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the transmission / reception unit 120 may transmit a plurality of downlink control information to be transmitted by using a plurality of downlink control channels assigned to different time domains.
- the transmission / reception unit 120 controls the schedule of the physical shared channel by using the plurality of downlink control information, and when the contents of the timing-related information included in the plurality of downlink control information are the same, the specific downlink control channel is set for a time.
- timing-related instruction information may be used to control the schedule of the physically shared channel.
- the transmission / reception unit 120 controls the schedule of the physical shared channel by using the plurality of downlink control information, and when the case where the content of the timing-related information included in the plurality of downlink control information is different is supported, each downlink control information is supported.
- the schedule of the physical shared channel may be controlled by using the timing-related information included in each downlink control information with the downlink control channel corresponding to the above as a time reference.
- FIG. 11 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
- the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
- the functional block of the feature portion in the present embodiment is mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
- the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
- the transmission / reception unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223.
- the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
- the transmitter / receiver 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.
- the transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
- the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
- the transmitting / receiving antenna 230 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 220 processes, for example, PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
- Whether or not to apply the DFT process may be based on the transform precoding setting.
- the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
- the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
- the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
- the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
- the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmission / reception unit 220 may perform measurement on the received signal.
- the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
- the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
- the measurement result may be output to the control unit 210.
- the transmission unit and the reception unit of the user terminal 20 in the present disclosure may be composed of at least one of the transmission / reception unit 220, the transmission / reception antenna 230, and the transmission path interface 240.
- the transmission / reception unit 220 may receive a plurality of downlink control information transmitted by using a plurality of downlink control channels assigned to different time domains.
- the control unit 210 controls at least one of reception and transmission of the physical shared channel scheduled by the plurality of downlink control information, and specifies when the contents of the timing-related information included in the plurality of downlink control information are the same. At least one of the reception timing and the transmission timing of the physically shared channel may be determined based on the timing-related information with the downlink control channel of the above as a time reference.
- the control unit 210 controls at least one of reception and transmission of the physical shared channel scheduled by the plurality of downlink control information, and supports a case where the contents of the timing-related information included in the plurality of downlink control information are different. In this case, at least one of the reception timing and the transmission timing of the physical shared channel may be determined based on the timing-related information included in each downlink control information with the downlink control channel corresponding to each downlink control information as a time reference. .. The control unit 210 may assume that the same time domain is designated by the timing-related information included in each downlink control information.
- a plurality of downlink control channels may be set in association with each other for predetermined transmission parameters.
- a plurality of downlink control channels may be assigned in the same slot, in the same subslot, or in the same minislot.
- the plurality of downlink control information may include information regarding specific downlink control information or information regarding a transmission order in the time domain.
- Multiple downlink control channels may be supported for allocation between different slots.
- each functional block is realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (configuration unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the realization method is not particularly limited.
- the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 12 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- the base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
- the processor 1001 may be mounted by one or more chips.
- the processor 1001 For each function in the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- predetermined software program
- the processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.
- CPU central processing unit
- control unit 110 210
- transmission / reception unit 120 220
- the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- a program program code
- the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
- the memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
- the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy disk (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, etc.). At least one of Blu-ray® discs), removable discs, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers and other suitable storage media. May be configured by.
- the storage 1003 may be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 has, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmission / reception unit 120 (220) may be physically or logically separated by the transmission unit 120a (220a) and the reception unit 120b (220b).
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings.
- channels, symbols and signals may be read interchangeably.
- the signal may be a message.
- the reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard.
- the component carrier CC may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.
- the wireless frame may be configured by one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
- the subframe may be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
- the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
- Numerology is, for example, subcarrier interval (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, wireless frame configuration.
- SCS subcarrier Spacing
- TTI Transmission Time Interval
- a specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols in the time domain (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.). Further, the slot may be a time unit based on numerology.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may include a plurality of mini slots. Each minislot may be composed of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. The minislot may consist of a smaller number of symbols than the slot.
- the PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may use different names corresponding to each.
- the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
- one subframe may be called TTI
- a plurality of consecutive subframes may be called TTI
- one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. May be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- TTI shorter than normal TTI may be referred to as shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot and the like.
- the long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms
- the short TTI eg, shortened TTI, etc.
- TTI having the above TTI length may be read as TTI having the above TTI length.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- one or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
- PRB Physical RB
- SCG sub-carrier Group
- REG resource element group
- PRB pair an RB. It may be called a pair or the like.
- the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth Part (which may also be called partial bandwidth) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active and the UE may not expect to send or receive a given signal / channel outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini-slots, and symbols are merely examples.
- the number of subframes contained in a radio frame the number of slots per subframe or radioframe, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
- the number of subcarriers, the number of symbols in TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
- the information, parameters, etc. described in the present disclosure may be expressed using an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented.
- the radio resource may be indicated by a given index.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
- Information, signals, etc. may be input / output via a plurality of network nodes.
- Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
- the notification of information is not limited to the embodiment / embodiment described in the present disclosure, and may be performed by using another method.
- the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or combinations thereof. May be carried out by.
- DCI downlink control information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
- the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.
- MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
- CE MAC Control Element
- the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
- the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- the terms “system” and “network” used in this disclosure may be used interchangeably.
- the “network” may mean a device (eg, a base station) included in the network.
- precoding "precoding weight”
- QCL Quality of Co-Co-Location
- TCI state Transmission Configuration Indication state
- space "Spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, "antenna port”, “antenna port group”, “layer”, “number of layers”
- Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, "antenna”, “antenna element", “panel” are compatible.
- base station BS
- wireless base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission point (Transmission Point (TP))
- Reception point Reception Point
- TRP Transmission / Reception Point
- Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (eg, 3) cells.
- a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio). Communication services can also be provided by Head (RRH))).
- RRH Remote Radio Head
- the term "cell” or “sector” refers to a portion or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.
- MS mobile station
- UE user equipment
- terminal terminal
- Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like.
- the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the user terminal 20 may have the function of the base station 10 described above.
- words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
- the upstream channel, the downstream channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station.
- the base station 10 may have the functions of the user terminal 20 described above.
- the operation performed by the base station may be performed by its upper node (upper node) in some cases.
- various operations performed for communication with a terminal are a base station, one or more network nodes other than the base station (for example,).
- Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
- Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG xG (xG (x is, for example, an integer or a fraction)
- Future Radio Access FAA
- RAT New -Radio Access Technology
- NR New Radio
- NX New radio access
- FX Future generation radio access
- GSM registered trademark
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- UMB Ultra Mobile Broadband
- LTE 802.11 Wi-Fi®
- LTE 802.16 WiMAX®
- LTE 802.20 Ultra-WideBand (UWB), Bluetooth®, and other suitable radios.
- UMB Ultra Mobile Broadband
- references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
- determining used in this disclosure may include a wide variety of actions.
- judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
- judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “determining” such as accessing) (for example, accessing data in memory).
- judgment (decision) is regarded as “judgment (decision)” of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
- the "maximum transmission power" described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal UE maximum transmit power, or may mean the rated maximum transmission power (the). It may mean rated UE maximum transmit power).
- connection are any direct or indirect connections or connections between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “bonded” to each other.
- the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- the radio frequency domain microwaves. It can be considered to be “connected” or “coupled” to each other using frequency, electromagnetic energy having wavelengths in the region, light (both visible and invisible) regions, and the like.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
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Abstract
Description
既存システム(例えば、Rel.15)において、物理共有チャネル(PDSCH及びPUSCHの少なくとも一つ)の時間ドメインのリソース割当て情報は下り制御情報(DCI)に含まれる。ネットワーク(例えば、基地局)は、DCIに含まれる所定フィールド(例えば、TDRAフィールド)を利用して、当該DCIでスケジュールされる物理共有チャネルがスケジュールされる時間ドメインリソースに関する情報をUEに通知する。
UEは、DCI(例えば、DCIフォーマット1_0/1_1/1_2)内のTDRAフィールドの値に基づいて、所定のテーブルにおける行インデックス(エントリ番号又はエントリインデックス)を決定してもよい。当該所定のテーブルは、DCIと、当該DCIによりスケジュールされるPDSCHとの間の時間オフセット(例えば、スロットオフセットK0)を示す情報、PDSCHのマッピングタイプを示す情報、PDSCHの開始シンボルS及び時間長Lの少なくとも一つを含んでいてもよい。PDSCHの開始シンボルS及び時間長Lの組み合わせはStart and Length Indicator(SLIV)と呼ばれてもよい。
UEは、DCI(例えば、DCIフォーマット0_0/0_1/0_2)内のTDRAフィールドの値に基づいて、所定のテーブルにおける行インデックス(エントリ番号又はエントリインデックス)を決定してもよい。当該所定のテーブルは、DCIと、当該DCIによりスケジュールされるPUSCHとの間の時間オフセット(例えば、スロットオフセットK2)を示す情報、PUSCHのマッピングタイプを示す情報、PUSCHの開始シンボルS及び時間長Lの少なくとも一つを含んでいてもよい。PUSCHの開始シンボルS及び時間長Lの組み合わせはStart and Length Indicator(SLIV)と呼ばれてもよい。
NRでは、1つ又は複数の送受信ポイント(Transmission/Reception Point(TRP))(マルチTRP)が、1つ又は複数のパネル(マルチパネル)を用いて、UEに対してDL送信を行うことが検討されている。また、UEが、1つ又は複数のTRPに対してUL送信を行うことが検討されている。
第1の態様では、PDCCH繰り返し送信に関する情報の通知/設定について説明する。
PDCCH繰り返し送信に関する情報は、上位レイヤシグナリング(例えば、RRCパラメータ、及びMAC CEの少なくとも一つ)を利用して、基地局からUEに通知/設定されてもよい。
PDCCH繰り返し送信に関する情報は、下り制御情報(例えば、DCI)を利用して、基地局からUEにダイナミックに通知されてもよい。PDCCH繰り返し送信に関する情報は、DCIに設定される新規フィールドを利用して通知されてもよいし、既存システムで設定されるフィールドを利用して通知されてもよい。
第2の態様では、異なる時間領域で送信されるPDCCH繰り返し(TDM PDCCH repetitions)により、ペイロード内容が同じDCI(same DCI payload content)が送信される場合について説明する。つまり、マルチPDCCHにより、同一のDCIペイロード内容がUEにそれぞれ通知されるケースに相当する。
異なる時間領域に割当てられるPDCCH繰り返し送信(例えば、TDM PDCCH repetition)は、スロット間の繰り返し送信(inter-slot PDCCH repetition)(図6A参照)がサポートされない構成としてもよい。言い換えると、スロット内PDCCH繰り返し(intra-slot PDCCH repetition)、及びミニスロット内PDCCH繰り返し(intra-mini-slot PDCCH repetition)の少なくとも一つ(図6B参照)がサポートされる構成としてもよい。
異なる時間領域に割当てられるPDCCH繰り返し送信(例えば、TDM PDCCH repetition)は、ミニスロット内PDCCH繰り返し(intra-mini-slot PDCCH repetition)のみがサポートされる構成としてもよい。言い換えると、異なる時間領域に割当てられるPDCCH繰り返し送信は、スロット間の繰り返し送信(inter-slot PDCCH repetition)及びスロット内PDCCH繰り返し(intra-slot PDCCH repetition)がサポートされない構成としてもよい。
異なる時間領域に割当てられるPDCCH繰り返し送信(例えば、TDM PDCCH repetition)において、時間基準となるPDCCHを判断するためのフィールド(例えば、新規フィールド)がDCIに設定されてもよい。例えば、各PDCCHに、当該PDCCHが時間基準となるPDCCHであるか(例えば、繰り返し送信において最初に送信されるPDCCHであるか)を示すフィールドが追加されてもよい。
第3の態様では、異なる時間領域で送信されるPDCCH繰り返し(TDM PDCCH repetitions)により、ペイロード内容が異なるDCI(same DCI payload content)の送信がサポート/許容される場合について説明する。つまり、マルチPDCCHにより、異なるDCIペイロード内容がUEにそれぞれ通知されるケースに相当する。
異なる時間領域に割当てられるPDCCH繰り返し送信(例えば、TDM PDCCH repetition)において、時間基準となるPDCCHを判断するための所定フィールド(例えば、新規フィールド)がDCIに設定されてもよい。例えば、各PDCCHに、当該PDCCHが時間基準となるPDCCHであるか(例えば、繰り返し送信において最初に送信されるPDCCHであるか)を示す所定フィールドが追加されてもよい。
周波数分割多重(FDM)/空間分割多重(SDM)を利用するPDCCH繰り返しに対して、UEは、各PDCCH/DCIに同じDCIペイロード内容(例えば、少なくとも時間関連情報)が含まれると想定してもよい。PDCCH繰り返し送信がFDM/SDMを利用する場合は、例えば、マルチPDCCH/マルチDCIが同じ時間領域(例えば、同一シンボル)で送信される場合に読み替えられてもよい。
UEは、繰り返し送信されるPDCCCH(例えば、マルチPDCCH/マルチDCI)のうち、いずれかのPDCCH/DCIで通知される時間関連情報にしたがって、スケジュールされる時間ドメインリソースを判断してもよい。
UEは、繰り返し送信されるPDCCCH(例えば、マルチPDCCH/マルチDCI)のうち、特定のPDCCH/DCIで通知される時間関連情報にしたがって、スケジュールされる時間ドメインリソースを判断してもよい。
DAIには、DL割り当てインデックス(Downlink Assignment Indicator(Index)(DAI))フィールドが含まれる場合もある。また、DAIフィールドは、カウンタDAI(counter DAI(cDAI))及びトータルDAI(total DAI(tDAI))に分割(split)されてもよい。
繰り返しのPDCCH(又は、マルチDCI)におけるDAIフィールドは、特定のPDCCH(例えば、繰り返しにおいて最初に送信されるPDCCH)に基づいて決定されてもよい。つまり、各DCIのDAIフィールドは、最初のPDCCH(又は、DCI)においてのみカウント(又は、カウントアップ)され、他のPDCCHにおいてカウントされなくてもよい。
繰り返しのPDCCH(又は、マルチDCI)におけるDAIフィールドは、繰り返しにおいて最後に送信されるPDCCHに基づいて決定されてもよい。この場合、各DCIに含まれるDCIフィールドは、最後のPDCCH/DCIにおけるカウント値が設定されてもよい。例えば、繰り返し回数がn回である場合、少なくとも繰り返し回数のn回分カウントされた値が各DCIのDCIフィールドに設定されてもよい。
繰り返し送信が適用されるPDCCH/DCIにおける各DAIフィールドは、同じ値が設定されてもよい。かかる場合、オプション4-1又はオプション4-2が適用されてもよい。
繰り返しのPDCCH(又は、マルチDCI)におけるDAIフィールドは、異なる値が設定されてもよい。かかる場合、各DCIにおけるDAIフィールドのカウント制御は、サービングセル、PDCCHモニタリングオケージョンの組み合わせに基づいて制御されてもよい。あるいは、サービングセルとPDCCHモニタリングオケージョンの少なくとも一つと、TRPインデックスの組み合わせに基づいて制御されてもよい。
UEは、PDCCHの繰り返しのサポート有無についてUE能力情報(UE capability)として基地局に報告してもよい。例えば、UEは、PDCCHの繰り返しに対して適用可能な多重方式(TDM/SDM/FDM)のサポート有無について基地局に報告してもよい。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図10は、一実施形態に係る基地局の構成の一例を示す図である。基地局10は、制御部110、送受信部120、送受信アンテナ130及び伝送路インターフェース(transmission line interface)140を備えている。なお、制御部110、送受信部120及び送受信アンテナ130及び伝送路インターフェース140は、それぞれ1つ以上が備えられてもよい。
図11は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、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。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- 異なる時間領域に割当てられる複数の下り制御チャネルを利用してそれぞれ送信される複数の下り制御情報を受信する受信部と、
前記複数の下り制御情報によりスケジュールされる物理共有チャネルの受信及び送信の少なくとも一つを制御する制御部と、を有し、
前記制御部は、前記複数の下り制御情報にそれぞれ含まれるタイミング関連情報の内容が同一である場合、特定の下り制御チャネルを時間基準として、前記タイミング関連情報に基づいて、前記物理共有チャネルの受信タイミング及び送信タイミングの少なくとも一つを判断することを特徴とする端末。 - 前記複数の下り制御チャネルは、所定の送信パラメータについて関連付けられて設定されることを特徴とする請求項1に記載の端末。
- 前記複数の下り制御チャネルは、同一スロット内、同一サブスロット内、又は同一ミニスロット内に割当てられることを特徴とする請求項1又は請求項2に記載の端末。
- 前記複数の下り制御情報は、前記特定の下り制御情報に関する情報、又は時間領域における送信順序に関する情報をそれぞれ含むことを特徴とする請求項1から請求項3のいずれかに記載の端末。
- 異なる時間領域に割当てられる複数の下り制御チャネルを利用してそれぞれ送信される複数の下り制御情報を受信する工程と、
前記複数の下り制御情報によりスケジュールされる物理共有チャネルの受信及び送信の少なくとも一つを制御する工程と、を有し、
前記複数の下り制御情報にそれぞれ含まれるタイミング関連情報の内容が同一である場合、特定の下り制御チャネルを時間基準として、前記タイミング関連の指示情報に基づいて、前記物理共有チャネルの受信タイミング及び送信タイミングの少なくとも一つを判断することを特徴とする端末の無線通信方法。 - 異なる時間領域に割当てられる複数の下り制御チャネルを利用してそれぞれ送信される複数の下り制御情報を送信する送信部と、
前記複数の下り制御情報を利用して物理共有チャネルのスケジュールを制御する制御部と、を有し、
前記制御部は、前記複数の下り制御情報にそれぞれ含まれるタイミング関連情報の内容が同一である場合、特定の下り制御チャネルを時間基準として、前記タイミング関連の指示情報を利用して、前記物理共有チャネルのスケジュールを制御することを特徴とする基地局。
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