WO2024176455A1 - 端末、無線通信方法及び基地局 - Google Patents
端末、無線通信方法及び基地局 Download PDFInfo
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- WO2024176455A1 WO2024176455A1 PCT/JP2023/006823 JP2023006823W WO2024176455A1 WO 2024176455 A1 WO2024176455 A1 WO 2024176455A1 JP 2023006823 W JP2023006823 W JP 2023006823W WO 2024176455 A1 WO2024176455 A1 WO 2024176455A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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
- Non-Patent Document 1 LTE-Advanced (3GPP Rel. 10-14) was specified for the purpose of achieving higher capacity and greater sophistication over LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).
- LTE 5th generation mobile communication system
- 5G+ 5th generation mobile communication system
- 6G 6th generation mobile communication system
- NR New Radio
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- a terminal In future wireless communication systems (e.g., NR), a terminal (user terminal, User Equipment (UE)) will be able to use one of multiple panels (multiple beams) for uplink (UL) transmission.
- UE User Equipment
- UL uplink
- DCI downlink control information
- PUSCH physical uplink shared channel
- one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control a single DCI multi-panel simultaneous transmission PUSCH when a configuration grant is applied.
- a terminal is characterized in that it has a receiving unit that receives a type 1 configuration grant and configuration information for two measurement reference signal (SRS) resource sets, and a control unit that controls a single DCI multi-panel simultaneous transmission physical uplink shared channel (PUSCH) using spatial division multiplexing (SDM) or a single frame network (SFN).
- SRS measurement reference signal
- PUSCH physical uplink shared channel
- SDM spatial division multiplexing
- SFN single frame network
- a single DCI multi-panel simultaneous transmission PUSCH can be appropriately controlled.
- FIG. 1 is a diagram illustrating an example of an association between a precoder type and a TPMI index.
- 2A-2C are diagrams illustrating an example of multiple panel transmission.
- 3A-3C show another example of multiple panel transmission.
- 4 is a diagram illustrating the application of the SRS resource set indication field of Rel.
- FIG. 5 illustrates an example of an SRS resource set indication field applied to dynamic switching between single panel transmission (STRP) and single panel transmission and STxMP SDM methods.
- FIG. 6 is a diagram showing an example of an association between options 2 and 3 in the first embodiment.
- FIG. 7 is a diagram illustrating an example of DCI according to the third embodiment.
- FIG. 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 9 is a diagram illustrating an example of the configuration of a base station according to an embodiment.
- FIG. 10 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment.
- FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment.
- FIG. 12 is a diagram illustrating an example of a vehicle according to an embodiment.
- Dynamic grant-based transmission is UL transmission using an uplink shared channel (e.g., PUSCH (Physical Uplink Shared Channel)) based on downlink control information (DCI) (UL grant), or DL transmission using a downlink shared channel (e.g., PDSCH (Physical Downlink Shared Channel)) based on DCI (DL assignment).
- PUSCH Physical Uplink Shared Channel
- DCI downlink control information
- PDSCH Physical Downlink Shared Channel
- Configured grant-based transmission is UL transmission using an uplink shared channel (e.g., PUSCH) based on configuration information (e.g., may be called a configured grant, configured UL grant, etc.) configured by a higher layer, or DL transmission using a downlink shared channel (e.g., PDSCH) based on configuration information (e.g., sps-config) configured by a higher layer.
- uplink shared channel e.g., PUSCH
- configuration information e.g., may be called a configured grant, configured UL grant, etc.
- PDSCH downlink shared channel
- configuration information e.g., sps-config
- UL resources are already assigned to the UE, and the UE can perform UL transmission autonomously using the configured resources, which is expected to achieve low-latency communications.
- Dynamic grant-based transmission may also be referred to as dynamic grant-based PUSCH, UL Transmission with dynamic grant, PUSCH with dynamic grant, UL Transmission with UL grant, UL grant-based transmission, UL transmission scheduled by dynamic grant (transmission resources are set), etc.
- Configured grant-based transmission may also be referred to as configured grant-based PUSCH, UL Transmission with configured grant, PUSCH with configured grant, UL Transmission without UL grant, UL grant-free transmission, UL transmission scheduled by configured grant (transmission resources are configured), etc.
- configuration grant-based DL transmission may be referred to as Semi-Persistent Scheduling (SPS).
- configuration grant-based UL transmission may be referred to as UL SPS.
- configuration grant may be read as “SPS”, “SPS/configuration grant”, etc., interchangeably.
- Type 1, Type 2, etc. For configuration grant-based transmission, several types (Type 1, Type 2, etc.) are applied.
- configured grant type 1 transmission type 1 configured grant
- the parameters used for configured grant-based transmission (which may be called configured grant-based transmission parameters, configured grant parameters, etc.) are configured in the UE using only higher layer signaling.
- configuration information for the configuration grant are configured in the UE by higher layer signaling.
- configuration grant parameters may be notified to the UE by physical layer signaling (e.g., downlink control information (DCI) for activation described later).
- DCI downlink control information
- the configuration grant parameters may be configured in the UE using the information element "ConfiguredGrantConfig" of a higher layer (e.g., RRC).
- the configuration grant parameters may include, for example, information that identifies the configuration grant resource.
- the configuration grant parameters may include, for example, information regarding the index of the configuration grant, a time offset, a periodicity, the number of repeated transmissions of a transport block (TB) (the number of repeated transmissions may be expressed as K), a redundancy version (RV) sequence used in the repeated transmission, the timer mentioned above, etc.
- the period and the time offset may be expressed in units of symbols, slots, subframes, frames, etc., respectively.
- the period may be indicated, for example, by a predetermined number of symbols.
- the number of repeated transmissions may be any integer, for example, 1, 2, 4, 8, etc. If the number of repeated transmissions is n (> 0), the UE may transmit the configured grant-based PUSCH using n transmission opportunities for a specified TB.
- the UE may determine that one or more configured grants have been triggered.
- the UE may perform PUSCH transmission without a dynamic grant using the configured resources for configured grant-based transmission (which may also be referred to as configured grant resources, transmission occasions, etc.). Note that even if configured grant-based transmission is configured, the UE may skip the configured grant-based transmission if there is no data in the transmission buffer.
- the UE may determine that one or more configuration grants have been triggered (or activated).
- the predetermined activation signal e.g., DCI for activation
- the predetermined activation signal may be a DCI (PDCCH) that is CRC (Cyclic Redundancy Check) scrambled with a predetermined identifier (e.g., CS-RNTI: Configured Scheduling Radio Network Temporary Identifier).
- the DCI may be used to control deactivation, retransmission, etc. of the configuration grant.
- the UE may determine whether to transmit PUSCH using the configured grant resource configured by a higher layer based on the above-mentioned specified activation signal.
- the UE may release (may be called release, deactivate, etc.) the resource (PUSCH) corresponding to the configured grant based on a DCI that deactivates the configured grant or the expiration of a specified timer (elapse of a specified time).
- the UE may transmit PUSCH without a dynamic grant using resources for activated configuration grant-based transmission (which may also be called configuration grant resources, transmission opportunities, etc.). Note that even if configuration grant-based transmission is activated (is in an active state), the UE may skip configuration grant-based transmission if there is no data in the transmission buffer.
- resources for activated configuration grant-based transmission which may also be called configuration grant resources, transmission opportunities, etc.
- the dynamic grant and the configured grant may each be referred to as an actual UL grant or a DL assignment. That is, the actual UL grant may be higher layer signaling (e.g., the information element (IE) "ConfiguredGrantConfig"), physical layer signaling (e.g., the above-mentioned predetermined activation signal), or a combination of these.
- IE information element
- ConfiguredGrantConfig physical layer signaling
- PUSCH precoder In NR, it is considered that a UE will support at least one of Codebook (CB)-based transmission and Non-Codebook (NCB)-based transmission.
- CB Codebook
- NCB Non-Codebook
- the UE will use at least a sounding reference signal (SRS) resource indicator (SRI) for measurement to determine a precoder (precoding matrix) for CB-based and/or NCB-based Physical Uplink Shared Channel (PUSCH) transmissions.
- SRS sounding reference signal
- SRI resource indicator
- precoder precoding matrix
- the UE may determine a precoder for PUSCH transmission based on the SRI, a transmitted rank indicator (Transmitted Rank Indicator (TRI)), a transmitted precoding matrix indicator (Transmitted Precoding Matrix Indicator (TPMI)), etc.
- a transmitted rank indicator Transmitted Rank Indicator (TRI)
- a transmitted precoding matrix indicator Transmitted Precoding Matrix Indicator (TPMI)
- NCB-based transmission the UE may determine a precoder for PUSCH transmission based on the SRI.
- the SRI, TRI, TPMI, etc. may be notified to the UE using Downlink Control Information (DCI).
- DCI Downlink Control Information
- the SRI may be specified by the SRS Resource Indicator field (SRI field) of the DCI, or by the parameter "srs-ResourceIndicator” included in the RRC information element "ConfiguredGrantConfig" of the configured grant PUSCH.
- the TRI and TPMI may be specified by the "Precoding information and number of layers" field of the DCI.
- the UE may report UE capability information regarding the precoder type, and the base station may set the precoder type based on the UE capability information by higher layer signaling.
- the UE capability information may be information on the precoder type used by the UE in PUSCH transmission (which may be represented by the RRC parameter "pusch-TransCoherence").
- the UE may determine the precoder to be used for PUSCH transmission based on precoder type information (which may be represented by the RRC parameter "codebookSubset") included in the PUSCH configuration information (the "PUSCH-Config" information element of the RRC signaling) notified by higher layer signaling.
- the UE may set a subset of the PMI specified by the TPMI by the codebookSubset.
- the precoder type may be specified by any one of full coherent, partial coherent, and non-coherent, or a combination of at least two of these (e.g., may be expressed by parameters such as "fullyAndPartialAndNonCoherent” and "partialAndNonCoherent”).
- Fully coherent may mean that all antenna ports used for transmission are synchronized (may be expressed as being able to align the phase, using the same precoder, etc.). Partially coherent may mean that some of the antenna ports used for transmission are synchronized, but those some ports cannot be synchronized with other ports. Non-coherent may mean that the antenna ports used for transmission cannot be synchronized.
- a UE that supports a fully coherent precoder type may be assumed to support partially coherent and non-coherent precoder types.
- a UE that supports a partially coherent precoder type may be assumed to support a non-coherent precoder type.
- the precoder type may be interpreted as coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc.
- the UE may determine, from multiple precoders (which may also be called precoding matrices, codebooks, etc.) for CB-based transmission, a precoding matrix corresponding to a TPMI index obtained from a DCI (e.g., DCI format 0_1; same below) that schedules an UL transmission.
- precoders which may also be called precoding matrices, codebooks, etc.
- Figure 1 shows an example of the association between precoder types and TPMI indexes.
- Figure 1 corresponds to a table of precoding matrix W for single-layer (rank 1) transmission using four antenna ports in DFT-s-OFDM (Discrete Fourier Transform spread OFDM, where transform precoding is enabled).
- W Discrete Fourier Transform spread OFDM
- the UE is notified of a TPMI of 0 to 27 for single layer transmission. Also, if the precoder type is partial and noncoherent (partialAndNonCoherent), the UE is set with a TPMI of 0 to 11 for single layer transmission. If the precoder type is noncoherent (nonCoherent), the UE is set with a TPMI of 0 to 3 for single layer transmission.
- a precoding matrix in which only one component in each column is not zero may be called a noncoherent codebook.
- a precoding matrix in which a predetermined number (not all) of components in each column are not zero may be called a partially coherent codebook.
- a precoding matrix in which all components in each column are not zero may be called a fully coherent codebook.
- Noncoherent and partially coherent codebooks may be referred to as antenna selection precoders.
- Fully coherent codebooks may be referred to as non-antenna selection precoders.
- a codebook precoding matrix
- RRC parameter "codebookSubset” “fullyAndPartialAndNonCoherent”
- the UE may receive information (SRS configuration information, for example, parameters in the RRC control element "SRS-Config") used to transmit a measurement reference signal (for example, a Sounding Reference Signal (SRS)).
- SRS configuration information for example, parameters in the RRC control element "SRS-Config"
- SRS-Config parameters in the RRC control element "SRS-Config”
- SRS-Config Sounding Reference Signal
- the UE may receive at least one of information regarding one or more SRS resource sets (SRS resource set information, e.g., the RRC control element "SRS-ResourceSet”) and information regarding one or more SRS resources (SRS resource information, e.g., the RRC control element "SRS-Resource”).
- SRS resource set information e.g., the RRC control element "SRS-ResourceSet
- SRS resource information e.g., the RRC control element "SRS-Resource”
- An SRS resource set may relate to (group together) a number of SRS resources.
- Each SRS resource may be identified by an SRS Resource Indicator (SRI) or SRS Resource Identifier (ID).
- SRI SRS Resource Indicator
- ID SRS Resource Identifier
- the SRS resource set information may include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on SRS usage.
- SRS-ResourceSetId SRS resource set ID
- SRS-ResourceId SRS resource set ID
- SRS resource type SRS resource type
- the SRS resource type may indicate any of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic SRS (A-SRS, AP-SRS).
- P-SRS periodic SRS
- SP-SRS semi-persistent SRS
- A-SRS aperiodic SRS
- AP-SRS aperiodic SRS
- the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation) and transmit A-SRS based on an SRS request in the DCI.
- RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse" may be, for example, beam management, codebook-based transmission (codebook: CB), non-codebook-based transmission (nonCodebook: NCB), antenna switching, etc.
- the SRS for codebook-based transmission or non-codebook-based transmission may be used to determine a precoder for codebook-based or non-codebook-based PUSCH transmission based on the SRI.
- the UE may determine a precoder for PUSCH transmission based on the SRI, a Transmitted Rank Indicator (TRI), and a Transmitted Precoding Matrix Indicator (TPMI).
- the UE may determine a precoder for PUSCH transmission based on the SRI.
- the SRS resource information may include an SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, transmit comb, SRS resource mapping (e.g., time and/or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, spatial relationship information of SRS, etc.
- SRS resource ID SRS-ResourceId
- SRS port number SRS port number
- SRS port number SRS port number
- transmit comb e.g., transmit comb
- SRS resource mapping e.g., time and/or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.
- SRS resource mapping e.g., time and/or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.
- two SRS resources may be configured by the RRC for the UE, and one of the two SRS resources may be indicated by a DCI (a 1-bit specified field).
- four SRS resources may be configured by the RRC for the UE, and one of the four SRS resources may be indicated by a DCI (a 2-bit specified field).
- RRC reconfiguration is required.
- reception by one TRP with multiple panels (Fig. 2B) or reception by two TRPs with ideal backhaul (Fig. 2C) is considered.
- a single PDCCH for scheduling multiple PUSCHs (e.g. simultaneous transmission of PUSCH#1 and PUSCH#2) is considered.
- Panel-specific transmission is considered to be supported and a panel ID is introduced.
- the base station may use the UL TCI or panel ID to configure or indicate panel-specific transmissions for UL transmissions.
- the UL TCI (UL TCI state) may be based on signaling similar to the DL beam indication supported in Rel. 15.
- the panel ID may be implicitly or explicitly applied to the transmission of at least one of the target RS resource or target RS resource set, PUCCH, SRS, and PRACH. If the panel ID is explicitly signaled, the panel ID may be configured in at least one of the target RS, target channel, and reference RS (e.g., DL RS resource configuration or spatial relationship information).
- the multi-panel UL transmission scheme or the candidate multi-panel UL transmission scheme may be at least one of the following schemes 1 to 3 (multi-panel UL transmission schemes 1 to 3). Only one of schemes 1 to 3 may be supported. A plurality of schemes including at least one of schemes 1 to 3 may be supported, and one of the plurality of schemes may be configured in the UE.
- Method 1 Scheme 1 is a coherent multi-panel UL transmission.
- SRI SRS Resource Indicator
- the UE maps one codeword (CW) or one transport block (TB) to L layers (PUSCH (1, 2, ..., L)) and transmits L layers from each of the two panels.
- Panel #1 and panel #2 are coherent.
- Scheme 1 can obtain diversity gain.
- the total number of layers in the two panels is 2L. If the maximum total number of layers is 4, the maximum number of layers in one panel is 2.
- Method 2 Scheme 2 is a non-coherent multi-panel UL transmission of one codeword (CW) or transport block (TB).
- Multiple panels may not be synchronized. Different layers are mapped to different panels and one CW or TB for PUSCH from multiple panels. A layer corresponding to one CW or TB may be mapped to multiple panels.
- the method may use up to 4 layers or up to 8 layers for UL. If up to 8 layers are supported, the method may support one CW or TB using up to 8 layers.
- the UE maps 1 CW or 1 TB to k layers (PUSCH(1, 2, ..., k)) and L-k layers (PUSCH(k+1, k+2, ..., L)), transmits k layers from panel #1, and transmits L-k layers from panel #2.
- Scheme 2 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.
- Method 3 is a non-coherent multi-panel UL transmission of two CWs or TBs.
- Multiple panels may not be synchronized. Different layers are mapped to different panels and two CWs or TBs for PUSCH from multiple panels. Layers corresponding to one CW or TB may be mapped to one panel. Layers corresponding to multiple CWs or TBs may be mapped to different panels.
- the method may use up to 4 layers or up to 8 layers for the UL. When up to 8 layers are supported, the method may support up to 4 layers per CW or TB.
- the UE maps CW#1 or TB#1 to k layers (PUSCH (1, 2, ..., k)), maps CW#2 or TB#2 to L-k layers (PUSCH (k+1, k+2, ..., L)), transmits k layers from panel #1, and transmits L-k layers from panel #2.
- Method 3 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.
- TDM MTRP PUSCH of Rel. 17 In Rel. 17, different PUSCH repetitions are associated with different beams/TRP/SRS resource sets.
- a single DCI multi-panel simultaneous transmission PUSCH scheme using Space Division Multiplexing (SDM) is being considered.
- the UE precodes different layers/DMRS ports of one PUSCH separately and transmits simultaneously from two different UE panels using one codeword (CW).
- CW codeword
- SFN single frequency network
- STRP transmission means that a PUSCH transmission is associated with one panel/TRP/SRS resource set.
- a first SRI field is associated with a first panel/TRP/SRS resource set
- a second SRI field is associated with a second panel/TRP/SRS resource set.
- the first TPMI field is associated with a first panel/TRP/SRS resource set
- the second TPMI field is associated with a second panel/TRP/SRS resource set.
- a specific field in the DCI may be used to indicate dynamic switching between STRP and STxMP. For example, at least one of the following (1) and (2) may be applied.
- Dynamic switching may be indicated to the UE using an SRS resource set indication field. This may be similar to the SRS resource set indication field in the TDM MTRP PUSCH of Rel. 17 shown in FIG. 4. Also, any of the following examples 1 to 4 may be applied.
- STxMP(first SRS resource set, second SRS resource set in order) means that the first X layers are associated with the first SRS resource set and the remaining layers are associated with the second SRS resource set.
- STxMP(second SRS resource set, first SRS resource set in order) means that the first X layers are associated with the second SRS resource set and the remaining layers are associated with the first SRS resource set.
- Example 1 When the SRS resource set indication field is 0, it indicates STRP (first SRS resource set only). When the SRS resource set indication field is 1, it indicates STRP (second SRS resource set only). When the SRS resource set indication field is 2, it indicates STxMP (first SRS resource set, second SRS resource set in that order). When the SRS resource set indication field is 3, it indicates STxMP (second SRS resource set, first SRS resource set in that order).
- STRP or STxMP may be indicated depending on the number of joint TCI states/UL TCI states indicated. For example, when two joint TCI states/UL TCI states are indicated, STxMP is indicated, and when one joint TCI state/UL TCI state is indicated, STRP is indicated.
- Figure 5 is a diagram showing an example of an SRS resource set indication field applied to dynamic switching between the single panel transmission method (STRP) and the STxMP SDM method.
- the example in Figure 5 corresponds to examples 1 and 2 above.
- the example in Figure 5 is applied to the SRS resource set indication field, and when the dynamic switching is not configured, the example in Figure 4 (existing method) may be applied.
- each aspect may also be applied to the STxMP SFN method (e.g., the SDCI STxMP SFN PUSCH method).
- SDM may be read as SFN.
- the UE may apply the first SRI field when an STRP transmission associated with the first/second panel/TRP/SRS resource set is indicated.
- the UE may interpret the first/second SRI fields as a single field.
- ⁇ Second aspect> For a codebook (CB)-based PUSH, when dynamic switching between a multi-panel simultaneous transmission SDM scheme (first scheme) and STRP transmission (second scheme in which the PUSH transmission is associated with one panel/TRP/SRS resource set) is applied (when a configuration for such switching is received) and STRP transmission (second scheme) is dynamically indicated (when an indication indicating STRP (second scheme) is received), at least one of the following options may be applied:
- the UE may apply the first TPMI field when STRP transmission (second scheme) associated with the first/second panel/TRP/SRS resource set is indicated.
- the UE may interpret the first/second TPMI fields as a single field.
- NCB non-codebook
- first scheme multi-panel simultaneous transmission SDM scheme
- STRP transmission second scheme in which PUSH transmission is associated with one panel/TRP/SRS resource set
- second scheme dynamically indicated (when an indication indicating STRP (second scheme) is received)
- at least one of the following options may be applied:
- the UE may apply the first SRI field when STRP transmission (second scheme) associated with the first/second panel/TRP/SRS resource set is indicated.
- the UE may interpret the first/second SRI fields as a single field.
- a terminal can use one of multiple panels (multiple beams) for UL transmission.
- multiple panels multiple beams
- a single DCI multi-panel simultaneous transmission PUSCH SDCI STxMP SDM PUSCH
- SDM spatial division multiplexing
- SDCI STxMP SFN PUSCH single DCI multi-panel simultaneous transmission PUSCH
- SRI and TPMI are set in configuredGrantConfiguration.
- SRI and TPMI are indicated in the activating DCI.
- SRI and TPMI are indicated in the scheduling DCI for retransmission. The settings/interpretation of these fields when applying SDCI, STxMP, SDM/SFN, and PUSCH are not clear.
- the inventors therefore came up with a method for appropriately controlling single DCI multi-panel simultaneous transmission PUSCH when a configuration grant is applied.
- A/B and “at least one of A and B” may be interpreted as interchangeable. Also, in this disclosure, “A/B/C” may mean “at least one of A, B, and C.”
- Radio Resource Control RRC
- RRC parameters RRC parameters
- RRC messages higher layer parameters, fields, information elements (IEs), settings, etc.
- IEs information elements
- CE Medium Access Control
- update commands activation/deactivation commands, etc.
- the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocols (e.g., NR Positioning Protocol A (NRPPa)/LTE Positioning Protocol (LPP)) messages), or a combination of these.
- RRC Radio Resource Control
- MAC Medium Access Control
- LPP LTE Positioning Protocol
- the MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc.
- the broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.
- MIB Master Information Block
- SIB System Information Block
- RMSI Remaining Minimum System Information
- OSI System Information
- the physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.
- DCI Downlink Control Information
- UCI Uplink Control Information
- Multi-panel simultaneous transmission may mean multiple UL transmissions being performed simultaneously from multiple panels.
- Simultaneous may mean that at least a portion of multiple UL transmissions overlap in time.
- supporting and setting/instructing may be interchangeable.
- transmission power and output power may be interchangeable.
- a decision by a UE and setting/instruction by a network may be interchangeable.
- panel, panel ID, TRP, UE capability value index, UE capability value set, TCI state, SRI, SRS resource set, SRS resource set ID, CORESET pool index, layer group, antenna port group, beam, and TCI state may be read as interchangeable.
- the overlap of two PUSCHs may mean that at least a portion of the two PUSCHs (PUSCH transmissions) overlap in time.
- the setting of simultaneous multi-panel transmission may mean that multiple DCIs associated with different CoresetPoolIndexes schedule different PUSCHs. Multiple PUSCHs associated with different CoresetPoolIndexes/panels, and multiple PUSCHs scheduled by multiple DCIs associated with different CoresetPoolIndexes/panels may be interpreted as interchangeable. Receiving the setting of simultaneous multi-panel transmission using multiple DCIs and setting simultaneous multi-panel transmission may be interpreted as interchangeable. DCI to activate and DC for activation may be interpreted as interchangeable.
- the first/second SRS resource set may correspond to an SRS resource set with a lower/higher ID.
- Single TRP (STRP) transmission means that a PUSCH transmission is associated with one panel/TRP/SRS resource set.
- STxMP SDM (STxMP SDM method) means that different layers of a PUSCH are associated with different panels/TRP/SRS resource sets.
- the UE receives (is configured with) a Type 1/Type 2 configuration grant and configuration information of two measurement reference signal (SRS) resource sets.
- the UE may then control a single DCI multi-panel simultaneous transmission physical uplink shared channel (PUSCH) using spatial division multiplexing (SDM) or single frame network (SFN).
- SRS measurement reference signal
- PUSCH physical uplink shared channel
- SDM spatial division multiplexing
- SFN single frame network
- a process will be described in which a type 1 configuration grant (configured grant (CG)) is configured, two SRS resource sets (codebook/non-codebook SRS resource sets) are configured, and a spatial division multiplexing (SDCI STxMP SDM PUSCH) method of single DCI multi-panel simultaneous transmission PUSCH is executed.
- the UE may receive configuration information indicating the SDCI STxMP SDM PUSCH method by higher layer signaling.
- the first/second SRS resource sets may be read as SRS resource sets having low (lowest)/high (highest) IDs.
- the configuration of SDCI STxMP SDM PUSCH is not applied to type 1 CG. That is, if type 1 CG is configured, the UE cannot transmit SDCI STxMP SDM PUSCH.
- Type 1 CG transmits STRP.
- the UE expects ConfiguredGrantConfig to include one field of srs-ResourceIndicator and one field of precodingAndNumberOfLayers.
- the PUSCH transmission is associated with the first SRS resource set.
- Whether the PUSCH transmission is related to the first SRS resource set or the second SRS resource set may be set in configuration information (ConfiguredGrantConfig) of the configuration grant.
- ConfiguredGrantConfig configuration information
- the SRS resource set ID is set in ConfiguredGrantConfig.
- the configuration of SDCI STxMP SDM PUSCH applies to Type 1 CG, that is, when Type 1 CG is configured, the UE performs SDCI STxMP SDM PUSCH transmission.
- the UE expects the ConfiguredGrantConfig to contain two srs-ResourceIndicator fields (srs-ResourceIndicator and srs-ResourceIndicator2) and two precodingAndNumberOfLayers fields (precodingAndNumberOfLayers and precodingAndNumberOfLayers2).
- srs-ResourceIndicator/precodingAndNumberOfLayers are associated with different SRS resource sets. That is, srs-ResourceIndicator/precodingAndNumberOfLayers is associated with the first SRS resource set. srs-ResourceIndicator2/precodingAndNumberOfLayers2 is associated with the second SRS resource set.
- configuredGrantConfig includes two srs-ResourceIndicator fields (srs-ResourceIndicator and srs-ResourceIndicator2) and two precodingAndNumberOfLayers fields (precodingAndNumberOfLayers and precodingAndNumberOfLayers2)
- the UE performs STxMP SDM PUSCH transmission.
- the association between the two srs-ResourceIndicator/precodingAndNumberOfLayers fields and the SRS resource set may be the same as in Option 2.
- the UE may perform single TRP transmission if Type 1 CG is configured and configuredGrantConfig contains one field each of srs-ResourceIndicator and precodingAndNumberOfLayers.
- the association between PUSCH transmission and SRS resource set is the same as in Option 1-1/Option 1-2.
- FIG. 6 is a diagram showing an example of the association of options 2 and 3 in the first embodiment. As shown in FIG. 6, srs-ResourceIndicator/precodingAndNumberOfLayers is associated with the first SRS resource set. srs-ResourceIndicator2/precodingAndNumberOfLayers2 is associated with the second SRS resource set.
- the first embodiment has been described assuming a case where a type 1 CG is set, but the same applies when a type 2 CG is set.
- the UE can appropriately control the SDCI STxMP SDM PUSCH method when a type 1 CG and two SRS resource sets are configured.
- the first embodiment may be applied to a case where the SDCI STxMP SFN PUSCH mode is configured. That is, in the first embodiment, SDM may be replaced with SFN.
- the third embodiment a process will be described in which two SRS resource sets (codebook/non-codebook SRS resource sets) are configured in a type 2 configuration grant (configured grant (CG)) and the SDCI STxMP SDM/SFN PUSCH scheme is executed.
- the UE may receive configuration information indicating the SDCI STxMP SDM/SFN PUSCH scheme by higher layer signaling.
- the first and second TPMI fields may be replaced with the DCI "Precoding information and number of layers" field and the second precoding information field.
- the UE may interpret/apply the SRI field/TPMI field/SRS resource set indication field in the same way as in the case of a dynamic grant PUSH.
- the UE may interpret/apply how the SRS resource set indication field indicates dynamic switching between STRP and STxMP SDM PUSCH, or how it indicates dynamic switching between STRP and STxMP SFN PUSCH, in the same manner as in the case of dynamic grant PUSCH.
- the UE also determines whether to apply/how to interpret the first/second SRI field/TPMI field in the same manner as in the case of dynamic grant PUSCH.
- the DCI activating the CG includes one SRI field
- the DCI may include one TPMI field (e.g., DCI format 0_0 is used).
- the PUSCH transmission may be associated with the first SRS resource set. In this case, the UE performs a PUSCH transmission for a single TRP.
- the UE when a type 2 CG and two SRS resource sets are configured, the UE can appropriately control the SDCI STxMP SDM/SFN PUSCH method and control dynamic switching between STRP and STxMP SFN PUSCH.
- the third embodiment may also be applied to a type 1 configured CG.
- the "type 2 configured grant (CG)" in the third embodiment may be read as "retransmission in type 1 configured CG (retransmission of PUSCH)".
- the "DCI to be activated” may be read as "scheduling DCI (DCI for scheduling retransmission of PUSCH)”.
- the network indicates the DMRS port for SDM transmission using the "antennaPort" field of the configuration information (ConfiguredGrantConfig) of the configuration grant.
- the UE determines the DMRS port for SDM transmission based on the "antennaPort" field of the ConfiguredGrantConfig.
- the first L1 of the indicated DMRS port is associated with the L1 PUSCH layers indicated by the first precodingAndNumberOfLayers field (precodingAndNumberOfLayers), and the remaining L-L1 layers of the indicated DMRS port are associated with the L-L1 PUSCH layers indicated by the second precodingAndNumberOfLayers field (precodingAndNumberOfLayers2).
- the first L1 of the indicated DMRS port is associated with the L1 PUSCH layers indicated by the first srs-ResourceIndicator field (srs-ResourceIndicator), and the remaining L-L1 are associated with the L-L1 PUSCH layers indicated by the second srs-ResourceIndicator field (srs-ResourceIndicator2) of the NCB-based PUSCH.
- the DMRS port indication may be the same as the PUSCH of the dynamic grant.
- the "antennaPort” field of the DCI may be used to indicate the DMRS port for SDM transmission.
- the UE determines the DMRS port for SDM transmission based on the "antennaPort” field of the configuration information (ConfiguredGrantConfig) of the configuration grant.
- activating DCI may mean a DCI that activates Type 2 CG
- “scheduling DCI” may mean a DCI that schedules PUSCH retransmission of Type 1 CG.
- the first L1 of the indicated DMRS port are associated with the L1 PUSCH layers indicated by the first TPMI field, and the remaining L-L1 of the indicated DMRS port are associated with the L-L1 PUSCH layers indicated by the second TPMI field.
- the first L1 of the indicated DMRS ports are associated with the L1 PUSCH layers indicated by the first SRI field, and the remaining L-L1 of the indicated DMRS ports are associated with the L-L1 PUSCH layers indicated by the second SRI field.
- the association of the indicated DMRS port with the L1 PUSCH layers indicated by the first/second SRI field and the L1 PUSCH layers indicated by the first/second TPMI field may be directly indicated by higher layer signaling/physical layer signaling.
- any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, any information is received from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.
- NW network
- BS base station
- the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader that is not specified in existing standards.
- LCID Logical Channel ID
- the notification When the notification is made by a DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.
- RNTI Radio Network Temporary Identifier
- CRC Cyclic Redundancy Check
- notification of any information to the UE in the above-mentioned embodiments may be performed periodically, semi-persistently, or aperiodically.
- notification of any information from the UE (to the NW) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.
- physical layer signaling e.g., UCI
- higher layer signaling e.g., RRC signaling, MAC CE
- a specific signal/channel e.g., PUCCH, PUSCH, PRACH, reference signal
- the MAC CE may be identified by including a new LCID in the MAC subheader that is not specified in existing standards.
- the notification may be transmitted using PUCCH or PUSCH.
- notification of any information from the UE may be performed periodically, semi-persistently, or aperiodically.
- At least one of the above-mentioned embodiments may be applied when a specific condition is satisfied, which may be specified in a standard or may be notified to a UE/BS using higher layer signaling/physical layer signaling.
- At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.
- the specific UE capabilities may indicate at least one of the following: Supporting specific processing/operations/control/information for at least one of the above embodiments; - Support STxMP, Supports SDCI STxMP SDM; Supports SDCI STxMP SFM; Number of DMRS ports in STxMP SDM method, ⁇ Values of L and L1.
- the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities per frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities per subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities per Feature Set (FS) or Feature Set Per Component-carrier (FSPC).
- FR1 Frequency Range 1
- FR2 FR2, FR3, FR4, FR5, FR2-1, FR2-2
- SCS subcarrier Spacing
- FS Feature Set
- FSPC Feature Set Per Component-carrier
- the specific UE capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the above-mentioned embodiments may be applied when the UE configures/activates/triggers specific information related to the above-mentioned embodiments (or performs the operations of the above-mentioned embodiments) by higher layer signaling/physical layer signaling.
- the specific information may be information indicating that SDCI STxMP SDM/SFN is enabled, any RRC parameters for a specific release (e.g., Rel. 18/19), etc.
- the UE may, for example, apply Rel. 15/16 operations.
- SRS resource indicator field and the precoding and number of layers field is associated with a first SRS resource set, and at least one of the SRS resource indicator 2 field and the precoding and number of layers 2 field is associated with a second SRS resource set.
- the receiving unit receives downlink control information (DCI) for scheduling retransmission of a PUSCH in a type 1 configuration grant;
- the DCI includes two SRS resource indicator (SRI) fields, two transmit precoding matrix index (TPMI) fields, and an SRS resource set indication field;
- SRI SRS resource indicator
- TPMI transmit precoding matrix index
- SRS resource set indication field SRS resource set indication field
- the terminal according to Supplementary Note 1 or 2, wherein the control unit interprets two SRI fields, two TPMI fields, and an SRS resource set indication field in the same manner as in the case of a dynamic grant PUSCH.
- the receiving unit receives configuration information of a configuration grant, The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the control unit determines a demodulation reference signal (DMRS) port for SDM transmission based on an antenna port field of the configuration information.
- DMRS demodulation reference signal
- PUSCH physical uplink shared channel
- SDM spatial division multiplexing
- SFN single frame network
- the receiver receives downlink control information (DCI) that activates a type 2 configuration grant;
- the DCI includes two SRS resource indicator (SRI) fields, two transmit precoding matrix index (TPMI) fields, and an SRS resource set indication field;
- the terminal according to Supplementary Note 1, wherein the control unit interprets two SRI fields, two TPMI fields, and an SRS resource set indication field in the same manner as in the case of a dynamic grant PUSCH.
- the receiving unit receives configuration information of a configuration grant, The terminal according to claim 1 or 2, wherein the control unit determines a demodulation reference signal (DMRS) port for SDM transmission based on an antenna port field of the configuration information.
- DMRS demodulation reference signal
- Wired communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
- communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these.
- FIG. 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- the wireless communication system 1 (which may simply be referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.
- LTE Long Term Evolution
- 3GPP Third Generation Partnership Project
- 5G NR 5th generation mobile communication system New Radio
- the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
- MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.
- RATs Radio Access Technologies
- MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.
- E-UTRA Evolved Universal Terrestrial Radio Access
- EN-DC E-UTRA-NR Dual Connectivity
- NE-DC NR-E-UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
- the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
- the wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).
- dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).
- gNBs NR base stations
- N-DC Dual Connectivity
- the wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged within the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1.
- a user terminal 20 may be located within at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.
- the user terminal 20 may be connected to at least one of the multiple base stations 10.
- the user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).
- CA carrier aggregation
- CC component carriers
- DC dual connectivity
- 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)).
- Macro cell C1 may be included in FR1
- small cell C2 may be included in FR2.
- FR1 may be a frequency band below 6 GHz (sub-6 GHz)
- FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
- the user terminal 20 may communicate 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 multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication).
- wire e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication e.g., NR communication
- base station 11 which corresponds to the upper station
- IAB Integrated Access Backhaul
- base station 12 which corresponds to a relay station
- the base station 10 may be connected to the core network 30 directly or via another base station 10.
- the core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the core network 30 may include network functions (Network Functions (NF)) such as, for example, a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM).
- NF Network Functions
- UPF User Plane Function
- AMF Access and Mobility management Function
- SMF Session Management Function
- UDM Unified Data Management
- AF Application Function
- DN Data Network
- LMF Location Management Function
- OAM Operation, Administration and Maintenance
- the user terminal 20 may be a terminal that supports at least one of the 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
- 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 radio access method may also be called a waveform.
- other radio access methods e.g., other single-carrier transmission methods, other multi-carrier transmission methods
- a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- PRACH Physical Random Access Channel
- SIB System Information Block
- PDSCH User data, upper layer control information, System Information Block (SIB), etc.
- SIB System Information Block
- PUSCH User data, upper layer control information, etc.
- MIB Master Information Block
- PBCH Physical Broadcast Channel
- Lower layer control information may be transmitted by the PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.
- DCI Downlink Control Information
- the DCI for scheduling the PDSCH may be called a DL assignment or DL DCI
- the DCI for scheduling the PUSCH may be called a UL grant or UL DCI.
- the PDSCH may be interpreted as DL data
- the PUSCH may be interpreted as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space may be used to detect the PDCCH.
- the CORESET corresponds to the resources to search for DCI.
- the search space corresponds to the search region and search method of PDCCH candidates.
- One CORESET may be associated with one or multiple search spaces. The UE may monitor the CORESET associated with a search space based on the search space configuration.
- a search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set. Note that the terms “search space,” “search space set,” “search space setting,” “search space set setting,” “CORESET,” “CORESET setting,” etc. in this disclosure may be read as interchangeable.
- the PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and a scheduling request (SR).
- UCI uplink control information
- CSI channel state information
- HARQ-ACK Hybrid Automatic Repeat reQuest ACKnowledgement
- ACK/NACK ACK/NACK
- SR scheduling request
- the PRACH may transmit a random access preamble for establishing a connection with a cell.
- downlink, uplink, etc. may be expressed without adding "link.”
- various channels may be expressed without adding "Physical” to the beginning.
- a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted.
- a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.
- the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
- a signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for PBCH) may be called an SS/PBCH block, an SS Block (SSB), etc.
- the SS, SSB, etc. 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
- DMRS may also be called a user equipment-specific reference signal (UE-specific Reference Signal).
- the base station 9 is a diagram showing an example of a configuration of a base station according to an embodiment.
- the base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.
- this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the base station 10 may also be assumed to have other functional blocks necessary for wireless communication. Some 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 configured from a controller, a control circuit, etc., which are described based on a common understanding in the technical field to which this disclosure pertains.
- the control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc.
- the control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc.
- the control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120.
- the control unit 110 may perform call processing of communication channels (setting, release, etc.), status management of the base station 10, management of radio resources, etc.
- the transceiver 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 transceiver unit 120 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.
- the transceiver unit 120 may be configured as an integrated transceiver 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 reception unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.
- the transmitting/receiving antenna 130 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
- the transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
- the transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.
- the transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.
- digital beamforming e.g., precoding
- analog beamforming e.g., phase rotation
- the transceiver 120 may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc., on data and control information obtained from the control unit 110, and generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control HARQ retransmission control
- the transceiver 120 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- channel coding which may include error correction coding
- DFT Discrete Fourier Transform
- IFFT Inverse Fast Fourier Transform
- the transceiver unit 120 may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.
- the transceiver unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.
- the transceiver 120 may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.
- reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.
- FFT Fast Fourier Transform
- IDFT Inverse Discrete Fourier Transform
- filtering demapping
- demodulation which may include error correction decoding
- MAC layer processing which may include error correction decoding
- the transceiver 120 may perform measurements on the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal.
- the measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc.
- RSRP Reference Signal Received Power
- RSSI Received Signal Strength Indicator
- the measurement results may be output to the control unit 110.
- the transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
- devices included in the core network 30 e.g., network nodes providing NF
- other base stations 10, etc. may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
- the transmitter and receiver of the base station 10 in this disclosure may be configured with at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission path interface 140.
- the transceiver unit 120 may transmit a type 1 configuration grant and configuration information for two measurement reference signal (SRS) resource sets.
- SRS measurement reference signal
- the transceiver unit 120 may transmit a type 2 configuration grant and configuration information for two measurement reference signal (SRS) resource sets.
- SRS measurement reference signal
- the control unit 110 may also control reception of a single DCI multi-panel simultaneous transmission physical uplink shared channel (PUSCH) using spatial division multiplexing (SDM) or a single frame network (SFN).
- PUSCH physical uplink shared channel
- SDM spatial division multiplexing
- SFN single frame network
- the user terminal 10 is a diagram showing an example of the configuration of a user terminal according to an embodiment.
- the user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the control unit 210, the transceiver unit 220, and the transceiver antenna 230 may each include one or more.
- this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the user terminal 20 may also be assumed to have other functional blocks necessary for wireless communication. Some 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 configured from a controller, a control circuit, etc., which are described based on a common understanding in the technical field to which this disclosure pertains.
- the control unit 210 may control signal generation, mapping, etc.
- the control unit 210 may control transmission and reception using the transceiver unit 220 and the transceiver antenna 230, measurement, etc.
- the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.
- the transceiver 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 transceiver unit 220 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.
- the transceiver unit 220 may be configured as an integrated transceiver 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 reception unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.
- the transmitting/receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
- the transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
- the transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.
- the transceiver 220 may form at least one of the transmit beam and receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.
- digital beamforming e.g., precoding
- analog beamforming e.g., phase rotation
- the transceiver 220 may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information acquired from the controller 210, and generate a bit string to be transmitted.
- RLC layer processing e.g., RLC retransmission control
- MAC layer processing e.g., HARQ retransmission control
- the transceiver 220 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- Whether or not to apply DFT processing may be based on the settings of transform precoding.
- the transceiver unit 220 transmission processing unit 2211
- the transceiver unit 220 may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, it is not necessary to perform DFT processing as the above-mentioned transmission processing.
- the transceiver unit 220 may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.
- the transceiver unit 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.
- the transceiver 220 may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
- reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
- the transceiver 220 may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal.
- the measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc.
- the measurement results may be output to the control unit 210.
- the measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources.
- the channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources.
- the measurement unit 223 may derive interference measurements for CSI calculation based on interference measurement resources.
- the interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc.
- CSI-IM may be called CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS.
- CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be read as interchangeable.
- the transmitting unit and receiving unit of the user terminal 20 in this disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.
- the transceiver unit 220 may receive a type 1 configuration grant and configuration information for two measurement reference signal (SRS) resource sets.
- SRS measurement reference signal
- the control unit 210 may control a single DCI multi-panel simultaneous transmission physical uplink shared channel (PUSCH) using spatial division multiplexing (SDM) or a single frame network (SFN).
- PUSCH physical uplink shared channel
- SDM spatial division multiplexing
- SFN single frame network
- At least one of the SRS resource indicator field and the precoding and number of layers field may be associated with a first SRS resource set, and at least one of the SRS resource indicator 2 field and the precoding and number of layers 2 field may be associated with a second SRS resource set.
- the transceiver 220 may receive downlink control information (DCI) that schedules the retransmission of the PUSCH in the type 1 configuration grant.
- the DCI may include two SRS resource indicator (SRI) fields, two transmit precoding matrix index (TPMI) fields, and an SRS resource set indication field.
- SRI SRS resource indicator
- TPMI transmit precoding matrix index
- SRS resource set indication field SRS resource set indication field.
- the control unit 210 may interpret the two SRI fields, the two TPMI fields, and the SRS resource set indication field in the same way as in the case of the dynamic grant PUSCH.
- the transceiver unit 220 may receive configuration information of the configuration grant.
- the control unit 210 may determine a demodulation reference signal (DMRS) port for SDM transmission based on the antenna port field of the configuration information.
- DMRS demodulation reference signal
- the transceiver unit 220 may receive a type 2 configuration grant and configuration information for two measurement reference signal (SRS) resource sets.
- SRS measurement reference signal
- the transceiver 220 may receive downlink control information (DCI) activating a type 2 configuration grant.
- the DCI may include two SRS resource indicator (SRI) fields, two transmit precoding matrix index (TPMI) fields, and an SRS resource set indication field.
- the control unit 210 may interpret the two SRI fields, the two TPMI fields, and the SRS resource set indication field in the same manner as in the case of a dynamic grant PUSCH.
- the transceiver unit 220 may receive configuration information of the configuration grant.
- the control unit 210 may determine a demodulation reference signal (DMRS) port for SDM transmission based on the antenna port field of the configuration information.
- DMRS demodulation reference signal
- each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.).
- the functional blocks may be realized by combining the one device or the multiple devices with software.
- the functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
- a functional block (component) that performs the transmission function may be called a transmitting unit, a transmitter, and the like. In either case, as mentioned above, there are no particular limitations on the method of realization.
- a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 11 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.
- the above-mentioned base station 10 and user terminal 20 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, etc.
- the terms apparatus, circuit, device, section, unit, etc. may be interpreted as interchangeable.
- 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 figures, or may be configured to exclude some of the devices.
- processor 1001 may be implemented by one or more chips.
- the functions of the base station 10 and the user terminal 20 are realized, for example, by loading specific software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of the reading and writing of data in the memory 1002 and storage 1003.
- the processor 1001 for example, runs an operating system to control the entire computer.
- the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
- CPU central processing unit
- control unit 110 210
- transmission/reception unit 120 220
- etc. may be realized by the processor 1001.
- the processor 1001 also reads out programs (program codes), software modules, 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.
- the programs used are those that cause a computer to execute at least some of the operations described in the above embodiments.
- the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks.
- Memory 1002 is a computer-readable recording medium and may be composed of at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. Memory 1002 may also be called a register, cache, main memory, etc. Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
- ROM Read Only Memory
- EPROM Erasable Programmable ROM
- EEPROM Electrically EPROM
- RAM Random Access Memory
- Memory 1002 may also be called a register, cache, main memory, etc.
- Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
- Storage 1003 is a computer-readable recording medium and may be composed of at least one of a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium.
- Storage 1003 may also be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, or a communication module.
- the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the above-mentioned transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004.
- the transmitting/receiving unit 120 (220) may be implemented as a transmitting unit 120a (220a) and a receiving unit 120b (220b) that are physically or logically separated.
- the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
- the output device 1006 is an output device (e.g., 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 be integrated into one structure (e.g., a touch panel).
- each device such as the processor 1001 and memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
- the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using the hardware.
- the processor 1001 may be implemented using at least one of these pieces of hardware.
- a channel, a symbol, and a signal may be read as mutually interchangeable.
- a signal may also be a message.
- a reference signal may be abbreviated as RS, and may be called a pilot, a pilot signal, or the like depending on the applied standard.
- a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
- a radio frame may be composed of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting a radio frame may be called a subframe.
- a subframe may be composed of one or more slots in the time domain.
- a subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
- the numerology may be a communication parameter that is applied to at least one of the transmission and reception of a signal or channel.
- the numerology may indicate, for example, at least one of the following: SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame configuration, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
- SCS SubCarrier Spacing
- TTI Transmission Time Interval
- radio frame configuration a specific filtering process performed by the transceiver in the frequency domain
- a specific windowing process performed by the transceiver in the time domain etc.
- a slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.).
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may also be a time unit based on numerology.
- a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A.
- a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.
- a radio frame, a subframe, a slot, a minislot, and a symbol all represent time units when transmitting a signal.
- a different name may be used for a radio frame, a subframe, a slot, a minislot, and a symbol, respectively.
- the time units such as a frame, a subframe, a slot, a minislot, and a symbol in this disclosure may be read as interchangeable.
- one subframe may be called a TTI
- multiple consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI.
- at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
- the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
- TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
- a base station schedules each user terminal by allocating radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) in TTI units.
- radio resources such as frequency bandwidth and transmission power that can be used by each user terminal
- the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
- the time interval e.g., the number of symbols
- the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum time unit of scheduling.
- the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- a TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
- a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
- a short TTI e.g., a shortened TTI, etc.
- TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of numerology, and may be, for example, 12.
- the number of subcarriers included in an RB may be determined based on numerology.
- an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may each be composed of one or more resource blocks.
- one or more RBs may be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.
- PRB Physical RB
- SCG sub-carrier Group
- REG resource element group
- PRB pair an RB pair, etc.
- a resource block may be composed of one or more resource elements (REs).
- REs resource elements
- one RE may be a radio resource area of one subcarrier and one symbol.
- a Bandwidth Part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within the BWP.
- the BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, and symbols are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
- the information, parameters, etc. described in this disclosure may be represented using absolute values, may be represented using relative values from a predetermined value, or may be represented using other corresponding information.
- a radio resource may be indicated by a predetermined index.
- the names used for parameters and the like in this disclosure are not limiting in any respect. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
- information, signals, etc. may be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
- Information, signals, etc. may be input/output via multiple network nodes.
- Input/output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input/output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.
- a specific location e.g., memory
- Input/output information, signals, etc. may be overwritten, updated, or added to.
- Output information, signals, etc. may be deleted.
- Input information, signals, etc. may be transmitted to another device.
- the notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
- the notification of information in this disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals, or a combination of these.
- 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 called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc.
- the RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
- the MAC signaling may be notified, for example, using a MAC Control Element (CE).
- CE MAC Control Element
- notification of specified information is not limited to explicit notification, but may be implicit (e.g., by not notifying the specified information or by notifying other information).
- the determination may be based on a value represented by a single bit (0 or 1), a Boolean value represented by true or false, or a comparison of numerical values (e.g., with a predetermined value).
- Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
- Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
- a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
- wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
- wireless technologies such as infrared, microwave, etc.
- Network may refer to the devices included in the network (e.g., base stations).
- the antenna port may be interchangeably read as an antenna port for any signal/channel (e.g., a demodulation reference signal (DMRS) port).
- the resource may be interchangeably read as a resource for any signal/channel (e.g., a reference signal resource, an SRS resource, etc.).
- the resource may include time/frequency/code/space/power resources.
- the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.
- the above groups may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.
- CDM Code Division Multiplexing
- RS Reference Signal
- CORESET Control Resource Set
- beam SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable.
- SRI SRS Resource Indicator
- CORESET CORESET pool
- PDSCH PUSCH
- codeword CW
- TB transport block
- RS etc.
- TCI state downlink TCI state
- DL TCI state downlink TCI state
- UL TCI state uplink TCI state
- unified TCI state common TCI state
- joint TCI state etc.
- QCL QCL
- QCL assumptions QCL relationship
- QCL type information QCL property/properties
- specific QCL type e.g., Type A, Type D
- specific QCL type e.g., Type A, Type D
- index identifier
- indicator indication, resource ID, etc.
- sequence list, set, group, cluster, subset, etc.
- TCI state ID may be interchangeable.
- TCI state ID may be interchangeable as “set of spatial relationship information (TCI state)", “one or more pieces of spatial relationship information”, etc.
- TCI state and TCI may be interchangeable.
- Spatial relationship information and spatial relationship may be interchangeable.
- Base Station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.
- a base station can accommodate one or more (e.g., three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))).
- RRH Remote Radio Head
- the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
- a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control/operate based on the information.
- MS Mobile Station
- UE User Equipment
- a mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc.
- at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
- the moving body in question refers to an object that can move, and the moving speed is arbitrary, and of course includes the case where the moving body is stationary.
- the moving body in question includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and objects mounted on these.
- the moving body in question may also be a moving body that moves autonomously based on an operating command.
- the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned).
- a vehicle e.g., a car, an airplane, etc.
- an unmanned moving object e.g., a drone, an autonomous vehicle, etc.
- a robot manned or unmanned
- at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations.
- 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
- FIG. 12 is a diagram showing an example of a vehicle according to an embodiment.
- the vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.
- various sensors including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58
- an information service unit 59 including a communication module 60.
- the drive unit 41 is composed of at least one of an engine, a motor, and a hybrid of an engine and a motor, for example.
- the steering unit 42 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.
- the electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an Input/Output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle.
- the electronic control unit 49 may also be called an Electronic Control Unit (ECU).
- ECU Electronic Control Unit
- Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal of the front wheels 46/rear wheels 47 acquired by a rotation speed sensor 51, an air pressure signal of the front wheels 46/rear wheels 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 58.
- the information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices.
- the information service unit 59 uses information acquired from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.
- various information/services e.g., multimedia information/multimedia services
- the information service unit 59 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
- input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
- output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
- the driving assistance system unit 64 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving load, such as a millimeter wave radar, a Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., a Global Navigation Satellite System (GNSS)), map information (e.g., a High Definition (HD) map, an Autonomous Vehicle (AV) map, etc.), a gyro system (e.g., an Inertial Measurement Unit (IMU), an Inertial Navigation System (INS), etc.), an Artificial Intelligence (AI) chip, and an AI processor, and one or more ECUs that control these devices.
- the driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize a driving assistance function or an autonomous driving function.
- the communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63.
- the communication module 60 transmits and receives data (information) via the communication port 63 between the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 that are provided on the vehicle 40.
- the communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
- the communication module 60 may be located either inside or outside the electronic control unit 49.
- the external device may be, for example, the above-mentioned base station 10 or user terminal 20.
- the communication module 60 may also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it may function as at least one of the base station 10 and user terminal 20).
- the communication module 60 may transmit at least one of the signals from the various sensors 50-58 described above input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication.
- the electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input.
- the PUSCH transmitted by the communication module 60 may include information based on the above input.
- the communication module 60 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle.
- the information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60).
- the communication module 60 also stores various information received from external devices in memory 62 that can be used by the microprocessor 61. Based on the information stored in memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided on the vehicle 40.
- the base station in the present disclosure may be read as a user terminal.
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- the user terminal 20 may be configured to have the functions of the base station 10 described above.
- terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink").
- the uplink channel, downlink channel, etc. may be read as the sidelink channel.
- the user terminal in this disclosure may be interpreted as a base station.
- the base station 10 may be configured to have the functions of the user terminal 20 described above.
- operations that are described as being performed by a base station may in some cases be performed by its upper node.
- a network that includes one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) or a Serving-Gateway (S-GW)), or a combination of these.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation.
- the processing procedures, sequences, flow charts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as there is no inconsistency.
- the methods described in this disclosure present elements of various steps using an exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced
- 4th generation mobile communication system 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG x is, for example, an integer or decimal
- Future Radio Access FX
- GSM Global System for Mobile communications
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi
- IEEE 802.16 WiMAX (registered trademark)
- IEEE 802.20 Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods, as well as next-generation systems that are expanded, modified,
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to elements using designations such as “first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
- determining may encompass a wide variety of actions. For example, “determining” may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking in a table, database, or other data structure), ascertaining, etc.
- Determining may also be considered to mean “determining” receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.
- judgment (decision) may be considered to mean “judging (deciding)” resolving, selecting, choosing, establishing, comparing, etc.
- judgment (decision) may be considered to mean “judging (deciding)” some kind of action.
- judgment (decision) may be interpreted interchangeably with the actions described above.
- expect may be read as “be expected”.
- "expect(s)" ("" may be expressed, for example, as a that clause, a to infinitive, etc.) may be read as “be expected".
- "does not expect" may be read as "be not expected".
- "An apparatus A is not expected" may be read as "An apparatus B other than apparatus A does not expect" (for example, if apparatus A is a UE, apparatus B may be a base station).
- the "maximum transmit power" referred to in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.
- connection and “coupled,” or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected” may be read as "accessed.”
- a and B are different may mean “A and B are different from each other.”
- the term may also mean “A and B are each different from C.”
- Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
- timing, time, duration, time instance, any time unit e.g., slot, subslot, symbol, subframe
- period occasion, resource, etc.
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Abstract
Description
NRでは、動的グラントベース送信(dynamic grant-based transmission)及び設定グラントベース送信(configured grant-based transmission)が検討されている。
NRでは、UEがコードブック(Codebook(CB))ベース送信及びノンコードブック(Non-Codebook(NCB))ベース送信の少なくとも一方をサポートすることが検討されている。
UEは、測定用参照信号(例えば、サウンディング参照信号(Sounding Reference Signal(SRS)))の送信に用いられる情報(SRS設定情報、例えば、RRC制御要素の「SRS-Config」内のパラメータ)を受信してもよい。
Rel.15及びRel.16のUEにおいては、1つのみのビーム及びパネルが、1つの時点においてUL送信に用いられる(図2A)。Rel.17においては、ULのスループット及び信頼性(reliability)の改善のために、1以上のTRPに対して、複数ビーム及び複数パネルの同時UL送信が検討されている。
マルチパネルUL送信方式又はマルチパネルUL送信方式候補は、次の方式1~3(マルチパネルUL送信方式1~3)の少なくとも1つであってもよい。方式1~3の1つのみがサポートされてもよい。方式1~3の少なくとも1つを含む複数の方式がサポートされ、複数の方式の1つがUEに設定されてもよい。
方式1は、コヒーレントマルチパネルUL送信である。
方式2は、1つのコードワード(CW)又はトランスポートブロック(TB)のノンコヒーレントマルチパネルUL送信である。
方式3は、2つのCW又はTBのノンコヒーレントマルチパネルUL送信である。
Rel.17において、異なるPUSCHの繰り返しは、異なるビーム/TRP/SRSリソースセットに関連付けられる。Rel.17のTDM MTRP PUSCHにおいて、SRSリソースセット指示フィールドは、MTRP送信とSTRP送信との間の動的切り替えを指示する(図4)。コードポイント"00"(インデックス=0)、コードポイント"01"(インデックス=1)が指示された場合、STRPであり、第1のSRIフィールド、第1のTPMIフィールドが適用され、第2のSRIフィールド、第2のTPMIフィールドは予約される。コードポイント"10"(インデックス=2)、コードポイント"11"(インデックス=3)が指示された場合、MTRPとなり、第1、第2のSRIフィールド、第1、第2のTPMIフィールドが適用される。
Rel.18のMIMOでは、8Txをサポートすること、マルチパネル同時送信(Simultaneous Transmission across Multiple Panels(STxMP))をサポートすることが検討されている。例えば、UE毎に4レイヤ以上をサポートする8Tx UL動作を可能にするUL DMRS、SRS、SRI、TPMI(コードブックを含む)の拡張が検討されている。また、Customer Premises Equipment(CPE)/Fixed Wireless Access(FWA)/車載/産業機器(該当する場合)を対象に、FR2、マルチTRPを中心に、最大2TRP、最大2パネルを想定し、ULスループット/信頼性向上のための多パネル同時送信を容易にするため検討が行われている。
STxMP SDM方式とSTRP送信の動的な切り替えにおいて、STxMP SDMが動的に指示された場合、以下の(1)、(2)の少なくとも1つが想定される。
(1)CB/NCB PUSCHのために、第1のSRIフィールドは、第1のパネル/TRP/SRSリソースセットに関連し、第2のSRIフィールドは第2のパネル/TRP/SRSリソースセットと関連する。
(2)CB PUSCHの場合、第1のTPMIフィールドは第1のパネル/TRP/SRSリソースセットに関連し、第2のTPMIフィールドは、第2のパネル/TRP/SRSリソースセットに関連する。
コードブック(CB)ベースのPUSCHのために、マルチパネル同時送信SDM方式(第1方式)とSTRP送信(PUSCH送信が1つのパネル/TRP/SRSリソースセットに関連する方式(第2方式))との間の動的な切り替えが適用され(当該切り替えの設定を受信し)、STRP送信(第2方式)が動的に指示された場合(STRP(第2方式)を示す指示を受信した場合)、以下の各オプションの少なくとも1つが適用されてもよい。
UEは、第1/第2のパネル/TRP/SRSリソースセットに関連するSTRP送信が指示された場合、第1のSRIフィールドを適用してもよい。
第1または第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、第1のSRIフィールド、第2のSRIフィールドがそれぞれ適用される。
第1または第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、より大きなサイズのSRIフィールドが適用されてもよい。
UEは、第1/第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、第1/第2のSRIフィールドを1つのフィールドとして結合して解釈してもよい。
コードブック(CB)ベースのPUSCHのために、マルチパネル同時送信SDM方式(第1方式)とSTRP送信(PUSCH送信が1つのパネル/TRP/SRSリソースセットに関連する第2方式)との間の動的な切り替えが適用され(当該切り替えの設定を受信し)、STRP送信(第2方式)が動的に指示された場合(STRP(第2方式)を示す指示を受信した場合)、以下の各オプションの少なくとも1つが適用されてもよい。
UEは、第1/第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、第1のTPMIフィールドを適用してもよい。
第1または第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、第1のTPMIフィールド、第2のTPMIフィールドがそれぞれ適用される。
UEは、第1/第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、第1/第2のTPMIフィールドを1つのフィールドとして結合して解釈してもよい。
ノンコードブック(NCB)ベースのPUSCHのために、マルチパネル同時送信SDM方式(第1方式)とSTRP送信(PUSCH送信が1つのパネル/TRP/SRSリソースセットに関連する第2方式)との間の動的な切り替えが適用され(当該切り替えの設定を受信し)、STRP送信(第2方式)が動的に指示された場合(STRP(第2方式)を示す指示を受信した場合)、以下の各オプションの少なくとも1つが適用されてもよい。
UEは、第1/第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、第1のSRIフィールドを適用してもよい。
第1または第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、第1のSRIフィールド、第2のSRIフィールドがそれぞれ適用される。
UEは、第1/第2のパネル/TRP/SRSリソースセットに関連するSTRP送信(第2方式)が指示された場合、第1/第2のSRIフィールドを1つのフィールドとして結合して解釈してもよい。
上述のように、将来の無線通信システム(例えば、NR)において、端末は、複数パネル(複数ビーム)の1つをUL送信に用いることができる。例えば、空間分割多重(SDM)を用いたシングルDCIマルチパネル同時送信PUSCH(SDCI STxMP SDM PUSCH)、又は、SFNを用いたシングルDCIマルチパネル同時送信PUSCH(SDCI STxMP SFN PUSCH)が適用される。
UEは、タイプ1/タイプ2設定グラント及び2つの測定用参照信号(SRS)リソースセットの設定情報を受信する(設定される)。そして、UEは、空間分割多重(SDM)またはシングルフレームネットワーク(SFN)を用いたシングルDCIマルチパネル同時送信物理上りリンク共有チャネル(PUSCH)を制御してもよい。以下、各ケースについて詳細に説明する。
第1の実施形態では、タイプ1設定グラント(configured grant(CG))が設定され、2つのSRSリソースセット(コードブック/ノンコードブックSRSリソースセット)が設定され、シングルDCIマルチパネル同時送信PUSCHの空間分割多重(SDCI STxMP SDM PUSCH)方式を実行する場合の処理について説明する。この場合、UEは、SDCI STxMP SDM PUSCH方式を示す設定情報を、上位レイヤシグナリングにより受信してもよい。本開示において、第1/第2のSRSリソースセットは、低い(最低の)/高い(最高の)IDを有するSRSリソースセットに読み替えられてもよい。
デフォルトでは、タイプ1CGにはSDCI STxMP SDM PUSCHの設定は適用されない。つまり、タイプ1CGが設定された場合、UEは、SDCI STxMP SDM PUSCH送信を行うことができない。タイプ1CGは、STRP送信を行う。UEは、ConfiguredGrantConfigにsrs-ResourceIndicatorの1フィールド、precodingAndNumberOfLayersの1フィールドが含まれることを期待する。
デフォルトでは、PUSCH送信は第1のSRSリソースセットと関連づけられる。
第1のSRSリソースセットに関連するPUSCH送信か、または第2のSRSリソースセットに関連するPUSCH送信かどうかについて、設定グラントの設定情報(ConfiguredGrantConfig)に設定されてもよい。例えば、SRSリソースセットIDはConfiguredGrantConfigに設定される。
デフォルトでは、SDCI STxMP SDM PUSCHの設定は、タイプ1CGに適用される。つまり、タイプ1CGが設定された場合、UEは、SDCI STxMP SDM PUSCH送信を実行する。
configuredGrantConfigにsrs-ResourceIndicatorの2つのフィールド(srs-ResourceIndicatorとsrs-ResourceIndicator2)、precodingAndNumberOfLayersの2つのフィールド(precodingAndNumberOfLayersとprecodingAndNumberOfLayers2)が含まれる場合、UEは、STxMP SDM PUSCH送信を実行する。この場合、srs-ResourceIndicator/precodingAndNumberOfLayersの2つのフィールドとSRSリソースセットとの関連付けについては、オプション2と同様であってもよい。
第1の実施形態は、SDCI STxMP SFN PUSCH方式が設定された場合に適用されてもよい。つまり、第1の実施形態において、SDMは、SFNに読み替えられてもよい。
第3の実施形態では、タイプ2設定グラント(configured grant(CG))において、2つのSRSリソースセット(コードブック/ノンコードブックSRSリソースセット)が設定され、SDCI STxMP SDM/SFN PUSCH方式を実行する場合の処理について説明する。なお、UEは、SDCI STxMP SDM/SFN PUSCH方式を示す設定情報を、上位レイヤシグナリングにより受信してもよい。
第3の実施形態は、タイプ1設定CGにも適用されてもよい。例えば、第3の実施形態における「タイプ2設定グラント(configured grant(CG))」は、「タイプ1設定CGにおける再送(PUSCHの再送)」に読み替えられてもよい。また、「アクティブ化するDCI」は、「スケジューリングDCI(PUSCHの再送をスケジューリングするDCI)」に読み替えられてもよい。
[実施形態5-1]
STxMP SDM方式によるタイプ1CGのPUSCH送信のケースについて説明する。ネットワークは、設定グラントの設定情報(ConfiguredGrantConfig)の“antennaPort”フィールドを使用して、SDM送信のためのDMRSポートを指示する。UEは、ConfiguredGrantConfigの“antennaPort”フィールドに基づいて、SDM送信のためのDMRSポートを決定する。
STxMP SDM方式による、タイプ2CGまたはタイプ1CGの再送のケースについて説明する。DMRSポート指示は動的グラントのPUSCHと同じであってもよい。SDM送信のためのDMRSポートを指示するために、DCIの“antennaPort”フィールドが使用されてもよい。UEは、設定グラントの設定情報(ConfiguredGrantConfig)の“antennaPort”フィールドに基づいて、SDM送信のためのDMRSポートを決定する。本開示において、「アクティブ化するDCI」は、タイプ2CGをアクティブ化するDCIを意味し、「スケジューリングDCI」は、タイプ1CGのPUSCH再送をスケジューリングするDCIを意味してもよい。
第5の実施形態において、上記L1は、仕様で定義されていてもよいし、上位レイヤシグナリング/物理レイヤシグナリングによりUEに設定/指示されていてもよい。例えば、L1=floor(L/2)であってもよい。
[UEへの情報の通知]
上述の実施形態における(ネットワーク(Network(NW))(例えば、基地局(Base Station(BS)))から)UEへの任意の情報の通知(言い換えると、UEにおけるBSからの任意の情報の受信)は、物理レイヤシグナリング(例えば、DCI)、上位レイヤシグナリング(例えば、RRCシグナリング、MAC CE)、特定の信号/チャネル(例えば、PDCCH、PDSCH、参照信号)、又はこれらの組み合わせを用いて行われてもよい。
上述の実施形態におけるUEから(NWへ)の任意の情報の通知(言い換えると、UEにおけるBSへの任意の情報の送信/報告)は、物理レイヤシグナリング(例えば、UCI)、上位レイヤシグナリング(例えば、RRCシグナリング、MAC CE)、特定の信号/チャネル(例えば、PUCCH、PUSCH、PRACH、参照信号)、又はこれらの組み合わせを用いて行われてもよい。
上述の実施形態の少なくとも1つは、特定の条件を満たす場合に適用されてもよい。当該特定の条件は、規格において規定されてもよいし、上位レイヤシグナリング/物理レイヤシグナリングを用いてUE/BSに通知されてもよい。
・上記実施形態の少なくとも1つについての特定の処理/動作/制御/情報をサポートすること、
・STxMPをサポートすること、
・SDCI STxMP SDMをサポートすること、
・SDCI STxMP SFMをサポートすること、
・STxMP SDM方式におけるDMRSポート数、
・L、L1の値。
本開示の一実施形態に関して、以下の発明を付記する。
[付記1]
タイプ1設定グラントおよび2つの測定用参照信号(SRS)リソースセットの設定情報を受信する受信部と、
空間分割多重(SDM)又はシングルフレームネットワーク(SFN)を用いたシングルDCIマルチパネル同時送信物理上りリンク共有チャネル(PUSCH)を制御する制御部と、
を有する端末。
[付記2]
SRSリソースインディケータフィールドと、プリコーディング及びレイヤ数フィールドとの少なくとも1つは、第1のSRSリソースセットと関連付けられ、SRSリソースインディケータ2フィールドと、プリコーディング及びレイヤ数2フィールドとの少なくとも1つは、第2のSRSリソースセットと関連付けられている
付記1に記載の端末。
[付記3]
前記受信部は、タイプ1設定グラントにおけるPUSCHの再送をスケジューリングする下りリンク制御情報(DCI)を受信し、
前記DCIは、2つのSRSリソースインジケータ(SRI)フィールド、2つの送信プリコーディング行列指標(TPMI)フィールド、及びSRSリソースセット指示フィールドを含み、
前記制御部は、2つのSRIフィールド、2つのTPMIフィールド、及びSRSリソースセット指示フィールドを、動的グラントPUSCHの場合と同様に解釈する
付記1又は付記2に記載の端末。
[付記4]
前記受信部は、設定グラントの設定情報を受信し、
前記制御部は、前記設定情報のアンテナポートフィールドに基づいて、SDM送信のための復調用参照信号(DMRS)ポートを決定する
付記1から付記3のいずれかに記載の端末。
(付記)
本開示の一実施形態に関して、さらに以下の発明を付記する。
[付記1]
タイプ2設定グラント及び2つの測定用参照信号(SRS)リソースセットの設定情報を受信する受信部と、
空間分割多重(SDM)又はシングルフレームネットワーク(SFN)を用いたシングルDCIマルチパネル同時送信物理上りリンク共有チャネル(PUSCH)を制御する制御部と、
を有する端末。
[付記2]
前記受信部は、タイプ2設定グラントをアクティブ化する下りリンク制御情報(DCI)を受信し、
前記DCIは、2つのSRSリソースインジケータ(SRI)フィールド、2つの送信プリコーディング行列指標(TPMI)フィールド、及びSRSリソースセット指示フィールドを含み、
前記制御部は、2つのSRIフィールド、2つのTPMIフィールド、及びSRSリソースセット指示フィールドを、動的グラントPUSCHの場合と同様に解釈する
付記1に記載の端末。
[付記3]
前記受信部は、設定グラントの設定情報を受信し、
前記制御部は、前記設定情報のアンテナポートフィールドに基づいて、SDM送信のための復調用参照信号(DMRS)ポートを決定する
付記1又は付記2に記載の端末。
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9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10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)
- タイプ1設定グラントおよび2つの測定用参照信号(SRS)リソースセットの設定情報を受信する受信部と、
空間分割多重(SDM)又はシングルフレームネットワーク(SFN)を用いたシングルDCIマルチパネル同時送信物理上りリンク共有チャネル(PUSCH)を制御する制御部と、
を有する端末。 - SRSリソースインディケータフィールドと、プリコーディング及びレイヤ数フィールドとの少なくとも1つは、第1のSRSリソースセットと関連付けられ、SRSリソースインディケータ2フィールドと、プリコーディング及びレイヤ数2フィールドとの少なくとも1つは、第2のSRSリソースセットと関連付けられている
請求項1に記載の端末。 - 前記受信部は、タイプ1設定グラントにおけるPUSCHの再送をスケジューリングする下りリンク制御情報(DCI)を受信し、
前記DCIは、2つのSRSリソースインジケータ(SRI)フィールド、2つの送信プリコーディング行列指標(TPMI)フィールド、及びSRSリソースセット指示フィールドを含み、
前記制御部は、2つのSRIフィールド、2つのTPMIフィールド、及びSRSリソースセット指示フィールドを、動的グラントPUSCHの場合と同様に解釈する
請求項1に記載の端末。 - 前記受信部は、設定グラントの設定情報を受信し、
前記制御部は、前記設定情報のアンテナポートフィールドに基づいて、SDM送信のための復調用参照信号(DMRS)ポートを決定する
請求項1に記載の端末。 - タイプ1設定グラントおよび2つの測定用参照信号(SRS)リソースセットの設定情報を受信する工程と、
空間分割多重(SDM)又はシングルフレームネットワーク(SFN)を用いたシングルDCIマルチパネル同時送信物理上りリンク共有チャネル(PUSCH)を制御する工程と、
を有する端末の無線通信方法。 - タイプ1設定グラントおよび2つの測定用参照信号(SRS)リソースセットの設定情報を送信する送信部と、
空間分割多重(SDM)又はシングルフレームネットワーク(SFN)を用いたシングルDCIマルチパネル同時送信物理上りリンク共有チャネル(PUSCH)の受信を制御する制御部と、
を有する基地局。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2023/006823 WO2024176455A1 (ja) | 2023-02-24 | 2023-02-24 | 端末、無線通信方法及び基地局 |
| JP2025502072A JPWO2024176455A5 (ja) | 2023-02-24 | 端末、無線通信方法、基地局及びシステム |
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Non-Patent Citations (2)
| Title |
|---|
| MINGJU LI, XIAOMI: "Unified TCI framework extension for multi-TRP", 3GPP DRAFT; R1-2211334; TYPE DISCUSSION; NR_MIMO_EVO_DL_UL-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Toulouse, FR; 20221114 - 20221118, 7 November 2022 (2022-11-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052221898 * |
| SEUNGHEE HAN, INTEL CORPORATION: "UL precoding indication for multi-panel transmission", 3GPP DRAFT; R1-2211387; TYPE DISCUSSION; NR_MIMO_EVO_DL_UL-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Toulouse, FR; 20221114 - 20221118, 7 November 2022 (2022-11-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052221951 * |
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