WO2024034120A1

WO2024034120A1 - Terminal, wireless communication method, and base station

Info

Publication number: WO2024034120A1
Application number: PCT/JP2022/030737
Authority: WO
Inventors: 尚哉芝池; 祐輝松村; 聡永田
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2024-02-15

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit which includes a sounding reference signal (SRS) request field for an SRS request and receives downlink control information (DCI) that indicates not to transmit an uplink shared channel; and a control unit which neglects a field excluding a specific field in the DCI. According to one aspect of the present disclosure, an SRS trigger link can be flexibly controlled.

Description

Terminal, wireless communication method and base station

The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system.

In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of higher data rates, lower delays, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is a specification for the purpose of further increasing capacity and sophistication of LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel. 8, 9). was made into

Successor systems to LTE (for example, also referred to as 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later) are also being considered. .

In NR, the uses of sounding reference signals (SRS) are wide-ranging. The NR SRS is used not only for uplink (UL) CSI measurement, but also for downlink (DL) CSI measurement, beam management, and the like.

However, the flexibility of SRS triggering has not been studied. If SRS triggering is not performed flexibly, resource utilization efficiency, communication throughput, communication quality, etc. may deteriorate.

Therefore, one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that flexibly control SRS triggering.

A terminal according to an aspect of the present disclosure includes a receiving unit that receives downlink control information (DCI) that includes an SRS request field for requesting a sounding reference signal (SRS) and that indicates not to transmit the uplink shared channel. and a control unit that ignores fields other than a specific field in the DCI.

According to one aspect of the present disclosure, SRS triggering can be flexibly controlled.

FIG. 1 is a diagram illustrating an example of a DCI format that triggers only SRS. FIG. 2 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 3 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 4 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 5 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 6 is a diagram illustrating an example of a vehicle according to an embodiment.

(SRS)
In NR, measurement reference signals (Sounding Reference Signals (SRS)) have a wide variety of uses. NR SRS is used not only for uplink (UL) CSI measurement, which is also used in existing LTE (LTE Rel. 8-14), but also for downlink (DL) CSI measurement, beam It is also used for beam management, etc.

The UE may be configured with one or more SRS resources. SRS resources may be identified by an SRS Resource Index (SRI).

Each SRS resource may have one or more SRS ports (may correspond to one or more SRS ports). For example, the number of ports for each SRS may be 1, 2, 4, etc.

The UE may be configured with one or more SRS resource sets. One SRS resource set may be associated with a predetermined number of SRS resources. The UE may use upper layer parameters in common with respect to SRS resources included in one SRS resource set. Note that the resource set in the present disclosure may be read as a set, resource group, group, or the like.

Information regarding SRS resources or resource sets may be configured in the UE using upper layer signaling, physical layer signaling, or a combination thereof.

Note that in the present disclosure, the upper layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), or the like. Broadcast information includes, for example, a master information block (MIB), a system information block (SIB), a minimum system information (RMSI), and other system information ( Other System Information (OSI)) may also be used.

The physical layer signaling may be, for example, downlink control information (DCI).

The SRS configuration information (for example, the RRC information element "SRS-Config") may include SRS resource set configuration information, SRS resource configuration information, etc.

SRS resource set configuration information (for example, "SRS-ResourceSet" of RRC parameters) includes an SRS resource set ID (Identifier) (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, and SRS It may also include information on the resource type (resourceType) and the usage of the SRS.

Here, the SRS resource type may indicate the same time domain behavior of SRS resource configuration, such as periodic SRS (Periodic SRS (P-SRS)), semi-persistent SRS (Semi-Persistent SRS) (SP-SRS)) or aperiodic SRS (A-SRS). Note that the UE may transmit the P-SRS and SP-SRS periodically (or periodically after activation). The UE may transmit the A-SRS based on the DCI's SRS request.

In addition, the usage of SRS (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") is, for example, beam management (beamManagement), codebook (CB), non-codebook (CB), non-codebook (NCB)), antenna switching (antenna switching), etc. For example, the SRS for codebook or non-codebook use may be used to determine a precoder for SRI-based codebook-based or non-codebook-based Physical Uplink Shared Channel (PUSCH) transmission.

SRS for beam management purposes may assume that only one SRS resource for each SRS resource set can be transmitted at a given time instant. Note that in the same Bandwidth Part (BWP), if a plurality of SRS resources corresponding to the same time domain behavior belong to different SRS resource sets, these SRS resources may be transmitted simultaneously.

SRS resource configuration information (e.g., "SRS-Resource" in RRC parameters) includes SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission Comb, SRS resource mapping (e.g., time and/or frequency resource). (location, resource offset, resource period, repetition number, number of SRS symbols, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, spatial relationship information, etc.

The UE may switch the Bandwidth Part (BWP) for transmitting SRS for each slot, or may switch the antenna. Further, the UE may apply at least one of intra-slot hopping and inter-slot hopping to SRS transmission.

(A-SRS triggering)
Existing SRS requests are made according to DCI format 0_1 or 1_1 and involve PUSCH scheduling or CSI requests. If DCI is allowed to be used only for SRS requests, the DCI field for PUSCH scheduling or CSI requests can be reused, increasing the flexibility of SRS triggering.

Extending at least one DCI format for A-SRS triggering is being considered. This DCI format may be a UE-specific DCI format. This DCI format may be DCI format 0_1/0_2 without UL data and CSI. In other words, this DCI does not schedule PUSCH and does not trigger CSI.

Rel. In 17, DCI that triggers only SRS is supported. UL transmission triggered/scheduled by DCI format 0_1/0_2 can be divided into several cases:
[Case 1] Case where DCI format 0_1/0_2 triggers UL-shared channel (SCH) and CSI reporting, and triggers or does not trigger SRS. This is Rel. Supported on 15/16/17.
[Case 2] A case where DCI format 0_1/0_2 does not trigger UL-SCH, triggers CSI reporting, and triggers or does not trigger SRS. This is Rel. Supported on 15/16/17.
[Case 3] Case where DCI format 0_1/0_2 triggers UL-SCH, does not trigger CSI reporting, and triggers or does not trigger SRS. This is Rel. Supported on 15/16/17.
[Case 4] A case where DCI format 0_1/0_2 does not trigger UL-SCH and CSI reporting but triggers SRS. This is Rel. Not supported in Rel.15/16. Supported in 17.
[Case 5] Case where DCI format 0_1/0_2 does not trigger UL-SCH and CSI reporting and SRS. This is Rel. Not supported on 15/16/17.

Rel. In case 2 of 16, all DCI fields except the SRS request field/CSI request field are ignored. Here, if ReportQuantity in CSI-ReportConfig for all CSI reports triggered by the CSI request field is set to 'none', the CSI request field is also ignored.

In case 4, within the DCI format 0_1/0_2 that triggers the transmission of SRS only, it is not clear which fields are ignored and which fields are not ignored. If such operations are not clear, there is a risk that communication quality will deteriorate.

Therefore, the present inventors came up with a method to flexibly control SRS triggering.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Note that each of the following embodiments (for example, each case) may be used alone, or may be applied in combination of at least two.

In the present disclosure, "A/B" and "at least one of A and B" may be read interchangeably. Furthermore, in the present disclosure, "A/B/C" may mean "at least one of A, B, and C."

In the present disclosure, "activate", "deactivate", "indicate", "select", "configure", "update", "determine", etc. may be read interchangeably. In this disclosure, supporting, controlling, being able to control, operating, capable of operating, etc. may be read interchangeably.

In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, upper layer parameters, information elements (IEs), settings, etc. may be read interchangeably. In the present disclosure, the terms Medium Access Control Element (CE), update command, activation/deactivation command, etc. may be read interchangeably.

In the present disclosure, the upper layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), or the like. Broadcast information includes, for example, a master information block (MIB), a system information block (SIB), a minimum system information (RMSI), and other system information ( Other System Information (OSI)) may also be used.

In the present disclosure, the physical layer signaling may be, for example, downlink control information (DCI), uplink control information (UCI), etc.

In this disclosure, an index, an identifier (ID), an indicator, a resource ID, etc. may be read interchangeably. In this disclosure, sequences, lists, sets, groups, groups, clusters, subsets, etc. may be used interchangeably.

In the present disclosure, a panel, a panel group, a beam, a beam group, a precoder, an uplink (UL) transmitting entity, a transmission/reception point (TRP), a base station, a spatial relation information (SRI), Spatial relationship, SRS resource indicator (SRI), control resource set (CONtrol REsource SET (CORESET)), Physical Downlink Shared Channel (PDSCH), codeword (CW), transport block (Transport) Block (TB)), reference signal (RS), antenna port (e.g. demodulation reference signal (DMRS) port), antenna port group (e.g. DMRS port group), group (e.g. , spatial relationship group, code division multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource) , resource set (for example, reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state, common TCI state, quasi-co-location (QCL), QCL assumption, etc. may be read interchangeably.

In this disclosure, "having the ability to..." may be interchanged with "supporting/reporting the ability to...".

In the present disclosure, resource allocation and resource assignment may be interchanged.

(Wireless communication method)
In each embodiment, the UE ignoring a certain DCI field may mean that the UE does not perform an action corresponding to the DCI field, or the UE ignores a certain DCI field. It is also possible to not perform UL transmission.

<Embodiment #1>
In DCI format 0_1/0_2 that triggers the transmission of SRS only, only a specific DCI field (specific field) is not ignored, and other fields may be ignored (FIG. 1). This allows Rel. 17. The UE is able to know which DCI fields should be ignored even if the UL-SCH indicator field in the DCI indicates that no data (UL-SCH) is to be transmitted.

《Option 1》
The specific DCI field may be a field listed in at least one of several options below.
[Option 1-1] SRS resource set indicator.
[Option 1-2] SRS resource indicator/second SRS resource indicator.
[Option 1-3] CSI request. Options 1-5 may apply if the CSI request field indicates a non-zero value. Options 1-5 may be applied if the reportQuantity in the CSI-ReportConfig for all CSI reports triggered by the CSI request field is set to 'none'.
[Option 1-4] SRS request.
[Option 1-5] SRS offset indicator. Offsets 1-5 may be applied if the upper layer parameter AvailableSlotOffset is not set for any aperiodic (A)-) SRS resource set in the scheduled cell. The upper layer parameter AvailableSlotOffset is set for at least one A-SRS resource set in the scheduled cell, and the maximum number of entries of AvailableSlotOffset set for all A-SRS resource sets is 1. In this case, an offset of 1-5 may be applied.
[Option 1-6] Carrier indicator. Options 1-6 may be applied if the triggering PDCCH and the triggered SRS are on the same carrier (component carrier).
[Option 1-7] TPC command. 2nd TPC command.
[Option 1-8] Open-loop power control parameter set indication.
[Option 1-9] Time domain resource allocation/assignment.
[Option 1-10] Frequency domain resource allocation/assignment.
[Option 1-11] A combination of at least two of the above. For example, options 1-4 and 1-5. For example, options 1-3, 1-4, and 1-5.

SRS-ResourceSet in SRS-Config may include a list of AvailableSlotOffsets (availableSlotOffsetList). AvailableSlotOffset indicates the number of available slots from slot n+k to the slot in which the A-SRS resource set is transmitted. Here, slot n is the slot with triggering DCI, and k is the existing triggering offset (slotOffset in resourceType aperiodic in its SRS-ResourceSet).

In the DCI that triggers the transmission of only SRS, the values of the DCI fields other than the specific DCI field may be arbitrary values or may be special values defined in the specifications. The special value may be all bits set to 0, all bits set to 0, or some other value.

《Option 2》
This embodiment may be applicable in the cases indicated in at least one of several options below.
[Option 2-1] Case where the CSI request field in DCI format 0_1/0_2 indicates zero.
[Option 2-2] Case where the CSI request field in DCI format 0_1/0_2 indicates non-zero and reportQuantity in CSI-ReportConfig is set to 'none' for all CSI reports triggered by the CSI request field.

For the cases of options 2-1 and 2-2, different fields from options 1-1 to 1-11 may be applied.

The following operations may be defined.
- Upon detection of a PDCCH with configured DCI format 0_0, 0_1, or 0_2, the UE shall not transmit the PUSCH corresponding to the indication by that DCI unless the UE generates a transport block. good.

In example 0/1/2/3 below, action 1 corresponds to a UE that does not support DCI that triggers only SRS, and action 2 corresponds to a UE that supports DCI that triggers only SRS, and the SRS request field is This corresponds to the case indicating that there is no A-SRS. In example 0/1 below, operation 3 is such that in a UE that supports DCI that only triggers SRS, the DCI triggers A-SRS, the CSI request field indicates a non-zero value, and the value is 'none'. Corresponding to the case corresponding to the CSI report associated with the reportQuantity of corresponds to In Example 2/3 below, operation 3 is: In a UE that supports DCI that triggers SRS only, the DCI triggers A-SRS, the CSI request field indicates a non-zero value, and the value corresponds to a CSI report associated with a reportQuantity of 'none', and in a UE supporting DCI that triggers only SRS, the DCI triggers A-SRS and the CSI request field indicates zero; corresponds to

According to this embodiment, the UE can appropriately interpret the DCI that triggers SRS.

<Embodiment #2>
A configuration/instruction may be introduced to inform the UE whether the function of DCI format 0_1/0_2 that only triggers A-SRS transmission is enabled (on) or disabled (off).

《Option 1》
The settings/instructions may be based on at least one of several options below.
[Option 1-1]
Its settings/indications are set by RRC. Explicit new RRC parameters may be introduced for this purpose. Instead of introducing a new RRC parameter, enable/disable of the function may be implicitly set by another RRC parameter. For example, another RRC parameter may be availableSlotOffset. Not setting availableSlotOffset may indicate that DCI format 0_1/0_2 that only triggers A-SRS is not set/enabled.
[Option 1-2]
Its settings/instructions are directed by the MAC CE.
[Option 1-3]
Its settings/instructions are directed by the DCI.

《Option 2》
An operation when the setting/instruction does not exist (default operation) may be defined. The default behavior may be based on at least one of several options:
[Option 2-1]
The function of DCI format 0_1/0_2 that only triggers A-SRS transmission is not enabled (disabled).
[Option 2-1]
The functionality of DCI format 0_1/0_2 to trigger A-SRS transmission only is enabled.

According to this embodiment, the UE can appropriately recognize whether or not to receive DCI that triggers only SRS.

<Specific example>
The operation of the UE according to embodiment #1/#2 may be represented by some examples below.

《Example 0》
At least one of the following operations 1 to 4 may be defined.

[Operation 1]
If the UE does not report the ability to support SRS-only triggering within DCI format 0_1/0_2, then upon detection of a specific DCI format 0_1 or 0_2, the UE may All fields except CSI request' are ignored and the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'.

[Operation 2]
If a UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may request a 'CSI request' ( Alternatively, all fields except 'CSI request' and 'SRS request' are ignored and the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. The DCI format 0_1 or 0_2 with 'SRS request' set to '00' or the least significant bit set to '00' if the UE is configured with supplementaryUplink in ServingCellConfig. (LSB) with 'SRS request'.

[Operation 3]
If a UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may send 'CSI request' and All fields except 'SRS request' and 'SRS offset indicator' are ignored, and the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

[Operation 4]
If the UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may send 'SRS request' and All fields except 'SRS offset indicator' are ignored and the PUSCH corresponding to the indication by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 is accompanied by 'CSI request' set to '0' only. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

《Example 1》
At least one of the following operations 1 to 4 may be defined.

[Operation 1]
If the UE does not report the ability to support SRS-only triggering within DCI format 0_1/0_2, then upon detection of a specific DCI format 0_1 or 0_2, the UE may All fields except CSI request' are ignored and the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. If the UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may follow at least one of actions 2 to 4 below.

[Operation 2]
Depending on the detection of a specific DCI format 0_1 or 0_2, the UE ignores all fields in this DCI except 'CSI request' (or 'CSI request' and 'SRS request') and PUSCH corresponding to instructions in format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. The DCI format 0_1 or 0_2 with 'SRS request' set to '00' or the least significant bit set to '00' if the UE is configured with supplementaryUplink in ServingCellConfig. (LSB) with 'SRS request'.

[Operation 3]
Depending on the detection of a specific DCI format 0_1 or 0_2, the UE ignores all fields in this DCI except 'CSI request' and 'SRS request' and 'SRS offset indicator' and Or the PUSCH corresponding to the instruction by 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

[Operation 4]
Upon detection of a specific DCI format 0_1 or 0_2, the UE ignores all fields in this DCI except 'SRS request' and 'SRS offset indicator' and follows the instructions by this DCI format 0_1 or 0_2. Do not transmit the corresponding PUSCH. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 is accompanied by 'CSI request' set to '0' only. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

《Example 2》
At least one of the following operations 1 to 3 may be defined.

[Operation 2]
If a UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may issue a 'CSI request' within this DCI upon detection of a specific DCI format 0_1 or 0_2. (or 'CSI request' and 'SRS request'), and does not transmit the PUSCH corresponding to the instruction according to this DCI format 0_1 or 0_2. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. The DCI format 0_1 or 0_2 with 'SRS request' set to '00' or the least significant bit set to '00' if the UE is configured with supplementaryUplink in ServingCellConfig. (LSB) with 'SRS request'.

[Operation 3]
If a UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may issue a 'CSI request' within this DCI upon detection of a specific DCI format 0_1 or 0_2. and ignores all fields except 'SRS request' and 'SRS offset indicator', and does not transmit the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none', or its DCI format 0_1 or 0_2 is accompanied by 'CSI request' set to '0' only. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

《Example 3》
At least one of the following operations 1 to 3 may be defined.

[Operation 1]
If the UE does not report the ability to support SRS-only triggering within DCI format 0_1/0_2, then upon detection of a particular DCI format 0_1 or 0_2, the UE may All fields except CSI request' are ignored and the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. If the UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may follow at least one of actions 2 to 3 below.

[Operation 3]
Depending on the detection of a specific DCI format 0_1 or 0_2, the UE ignores all fields in this DCI except 'CSI request' and 'SRS request' and 'SRS offset indicator' and Or the PUSCH corresponding to the instruction by 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none', or its DCI format 0_1 or 0_2 is accompanied by 'CSI request' set to '0' only. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

《Example 4》
There may be cases where the SRS offset indicator is not signaled by the DCI (eg, if only one t value is set by the RRC).

In example 0, action 4 may be defined as follows.

[Operation 4]
If the UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE shall issue an 'SRS request' within this DCI upon detection of a specific DCI format 0_1 or 0_2. and 'SRS offset indicator' if so specified, and ignores all fields except 'SRS offset indicator' and does not transmit the PUSCH corresponding to the indication by this DCI format 0_1 or 0_2. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 is accompanied by 'CSI request' set to '0' only. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

Similarly, in Example 1, action 4 may be defined as follows.

[Operation 4]
The UE ignores all fields in this DCI except 'SRS request' and 'SRS offset indicator' if indicated, depending on the detection of a specific DCI format 0_1 or 0_2; PUSCH corresponding to the instruction based on this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 is accompanied by 'CSI request' set to '0' only. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

Similarly, in Example 2, action 3 may be defined as follows.

[Operation 3]
If a UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may issue a 'CSI request' within this DCI upon detection of a specific DCI format 0_1 or 0_2. It ignores all fields except 'SRS request' and 'SRS offset indicator' if instructed, and does not transmit the PUSCH corresponding to the indication by this DCI format 0_1 or 0_2. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none', or its DCI format 0_1 or 0_2 is accompanied by 'CSI request' set to '0' only. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

Similarly, in Example 3, action 3 may be defined as follows.

[Operation 3]
Depending on the detection of a specific DCI format 0_1 or 0_2, the UE may send all messages within this DCI except 'CSI request', 'SRS request' and 'SRS offset indicator' if indicated. field is ignored and the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none', or its DCI format 0_1 or 0_2 is accompanied by 'CSI request' set to '0' only. The DCI format 0_1 or 0_2 is accompanied by a non-zero 'SRS request', or if the UE is configured with a supplementaryUplink in the ServingCellConfig, an 'SRS request' with non-zero 2 LSBs.

《Example 5》
A UE supporting DCI format 0_1/0_2 that only triggers A-SRS transmission may know whether to trigger only A-SRS transmission by reading the SRS request field.

At least one of the following operations 1 to 2 may be specified.

[Operation 1]
If the UE does not report the ability to support SRS-only triggering within DCI format 0_1/0_2, then upon detection of a specific DCI format 0_1 or 0_2, the UE may All fields except request' are ignored and the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. If the UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may follow action 2 below.

[Operation 2]
Depending on the detection of a specific DCI format 0_1 or 0_2, the UE ignores all fields in this DCI except 'CSI request' (or 'CSI request' and 'SRS request') and PUSCH corresponding to instructions in format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. The DCI format 0_1 or 0_2 has the least significant bit set to '00' with 'SRS request' set to '00' or if the UE is configured with supplementaryUplink in ServingCellConfig. (LSB) with 'SRS request'.

《Example 6》
Rather than the UE deciding its behavior based on UE capabilities, the NW configures whether to enable or disable the DCI format 0_1/0_2 functionality that only triggers A-SRS transmission. , may determine the behavior of the UE.

At least one of the following operations 1 to 2 may be specified.

[Operation 1]
If the UE is not configured with an RRC parameter that enables SRS-only triggering within DCI format 0_1/0_2, then upon detection of a particular DCI format 0_1 or 0_2, the UE In the field, all fields except 'CSI request' are ignored and the PUSCH corresponding to the instruction by this DCI format 0_1 or 0_2 is not transmitted. Here, the specific DCI format 0_1 or 0_2 is accompanied by the 'UL-SCH indicator' set to '0'. That DCI format 0_1 or 0_2 has a non-zero 'CSI request' and the reportQuantity in the associated CSI-ReportConfig for all CSI reports triggered by 'CSI request' in that DCI format 0_1 or 0_2. is set to 'none'. If the UE reports the ability to support SRS-only triggering within DCI format 0_1/0_2, the UE may follow action 2 below.

<Supplement>
Embodiment #1/#2 may be applied for UEs supporting DCI format 0_1/0_2 that only triggers A-SRS transmission.

[Notification of information to UE]
Notification of any information (from the Network (NW) (e.g., Base Station (BS)) to the UE (in other words, reception of any information from the BS at the UE) in the above embodiments ) is performed using physical layer signaling (e.g. DCI), higher layer signaling (e.g. RRC signaling, MAC CE), specific signals/channels (e.g. PDCCH, PDSCH, reference signals), or a combination thereof. It's okay.

When the above notification is performed by a MAC CE, the MAC CE may be identified by including a new logical channel ID (LCID) that is not specified in the existing standard in the MAC subheader.

When the above notification is performed by a DCI, the above notification includes a specific field of the DCI, a radio network temporary identifier (Radio Network Temporary Identifier (RNTI)), the format of the DCI, etc.

Additionally, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[Notification of information from UE]
The notification of any information from the UE (to the NW) in the above embodiments (in other words, the transmission/reporting of any information to the BS in the UE) is performed using physical layer signaling (e.g. UCI), upper layer signaling (e.g. , RRC signaling, MAC CE), specific signals/channels (eg, PUCCH, PUSCH, PRACH, reference signals), or a combination thereof.

When the above notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID that is not defined in the existing standard in the MAC subheader.

When the above notification is performed by UCI, the above notification may be transmitted using PUCCH or PUSCH.

Further, notification of arbitrary information from the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[About application of each embodiment]
At least one of the embodiments described above may be applied if certain conditions are met. The specific conditions may be specified in the standard, or may be notified to the UE/BS using upper layer signaling/physical layer signaling.

At least one of the embodiments described above may be applied only to UEs that have reported or support a particular UE capability.

The particular UE capability may indicate at least one of the following:
- Support for DCI that triggers SRS transmission only.
- Support for DCI format 0_1/0_2 that triggers SRS transmission only.
- Support for DCI to trigger SRS transmission without triggering PUSCH/UL-SCH/UL data transmission and CSI reporting.

Further, the specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency) or a capability that is applied across all frequencies (e.g., cell, band, band combination, BWP, component carrier, etc.). or a combination thereof), or it may be a capability for each frequency range (for example, Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2). Alternatively, it may be a capability for each subcarrier spacing (SCS), or a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all duplex schemes (commonly regardless of the duplex scheme), or may be a capability that is applied across all duplex schemes (for example, Time Division Duplex). The capability may be for each frequency division duplex (TDD)) or frequency division duplex (FDD)).

In addition, at least one of the embodiments described above may be configured such that the UE configures/activates specific information related to the embodiment described above (or performs the operation of the embodiment described above) by upper layer signaling/physical layer signaling. / May be applied when triggered. For example, the specific information may be information indicating that the functions of each embodiment are enabled, arbitrary RRC parameters for a specific release (for example, Rel. 18/19), or the like.

If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, for example, Rel. 15/16 operations may be applied.

(Additional note)
Regarding one embodiment of the present disclosure, the following invention will be added.
[Additional note 1]
a receiving unit that receives downlink control information (DCI) that includes an SRS request field for requesting a sounding reference signal (SRS) and indicates that the uplink shared channel is not transmitted;
A terminal comprising: a control unit that ignores fields other than a specific field in the DCI.
[Additional note 2]
The terminal according to supplementary note 1, wherein the control unit reports the ability of the DCI to support requesting the SRS, not requesting channel state information, and not scheduling the uplink shared channel.
[Additional note 3]
According to appendix 1 or appendix 2, the specific field is at least one of a field for requesting channel state information, the SRS request field, and an SRS offset indicator field regarding the offset of the slot of the transmission of the SRS. The device listed.
[Additional note 4]
The terminal according to any one of appendices 1 to 3, wherein the value of the channel state information request field in the DCI is non-zero and there is no reporting amount associated with the value, or the value is zero.

(wireless communication system)
The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

FIG. 2 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (also simply referred to as system 1) uses Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). It may also be a system that realizes communication using

Additionally, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC has dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)).

In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

The wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) where both the MN and SN are NR base stations (gNB)). )) may be supported.

The wireless communication system 1 includes a base station 11 that forms a macro cell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macro cell C1 and form a small cell C2 that is narrower than the macro cell C1. You may prepare. User terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

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, and small cell C2 may be included in FR2. For example, FR1 may be a frequency band below 6 GHz (sub-6 GHz), and 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 FR1 may correspond to a higher frequency band than FR2, for example.

Further, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

The plurality of base stations 10 may be connected by wire (for example, optical fiber, X2 interface, etc. compliant with Common Public Radio Interface (CPRI)) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is an upper station, is an Integrated Access Backhaul (IAB) donor, and base station 12, which is a relay station, is an IAB donor. May also be called a node.

The base station 10 may be connected to the core network 30 via another base station 10 or directly. The core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.

Core Network 30 is, for example, User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management (SMF), Unified Data Management. T (UDM), ApplicationFunction (AF), Data Network (DN), Location Management Network Functions (NF) such as Function (LMF) and Operation, Administration and Maintenance (Management) (OAM) may also be included. Note that multiple functions may be provided by one network node. Further, communication with an external network (eg, the Internet) may be performed via the DN.

The user terminal 20 may be a terminal compatible with at least one of communication systems such as LTE, LTE-A, and 5G.

In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access method may be used. For example, in at least one of the downlink (DL) and uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

A wireless access method may also be called a waveform. Note that in the wireless communication system 1, other wireless access methods (for example, other single carrier transmission methods, other multicarrier transmission methods) may be used as the UL and DL radio access methods.

In the wireless communication system 1, the downlink channels include a physical downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (physical broadcast channel (PBCH)), and a downlink control channel (physical downlink control). Channel (PDCCH)) or the like may be used.

In the wireless communication system 1, uplink channels include a physical uplink shared channel (PUSCH) shared by each user terminal 20, an uplink control channel (PUCCH), and a random access channel. (Physical Random Access Channel (PRACH)) or the like may be used.

User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH. User data, upper layer control information, etc. may be transmitted by PUSCH. Furthermore, a Master Information Block (MIB) may be transmitted via the PBCH.

Lower layer control information may be transmitted by PDCCH. The lower layer control information may include, for example, downlink control information (DCI) that includes scheduling information for at least one of PDSCH and PUSCH.

Note that the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. Note that PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

A control resource set (CONtrol REsource SET (CORESET)) and a search space may be used to detect the PDCCH. CORESET corresponds to a resource for searching DCI. The search space corresponds to a search area and a search method for PDCCH candidates (PDCCH candidates). One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. in the present disclosure may be read interchangeably.

The PUCCH allows channel state information (CSI), delivery confirmation information (for example, may be called Hybrid Automatic Repeat Request ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and scheduling request ( Uplink Control Information (UCI) including at least one of SR)) may be transmitted. A random access preamble for establishing a connection with a cell may be transmitted by PRACH.

Note that in this disclosure, downlinks, uplinks, etc. may be expressed without adding "link". Furthermore, various channels may be expressed without adding "Physical" at the beginning.

In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may be transmitted. In the wireless communication system 1, the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DeModulation). Reference Signal (DMRS)), Positioning Reference Signal (PRS), 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 SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS/PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

In addition, in the wireless communication system 1, measurement reference signals (Sounding Reference Signal (SRS)), demodulation reference signals (DMRS), etc. are transmitted as uplink reference signals (UL-RS). good. Note that DMRS may be called a user terminal-specific reference signal (UE-specific reference signal).

(base station)
FIG. 3 is a diagram illustrating an example of the configuration of a base station according to an embodiment. The base station 10 includes a control section 110, a transmitting/receiving section 120, a transmitting/receiving antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.

Note that this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 110 controls the entire base station 10. The control unit 110 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.

The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), and the like. The control unit 110 may control transmission and reception, measurement, etc. using the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140. The control unit 110 may generate data, control information, a sequence, etc. to be transmitted as a signal, and may transfer the generated data to the transmitting/receiving unit 120. The control unit 110 may perform communication channel call processing (setting, release, etc.), status management of the base station 10, radio resource management, and the like.

The transmitting/receiving section 120 may include a baseband section 121, a radio frequency (RF) section 122, and a measuring section 123. The baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212. The transmitter/receiver unit 120 includes a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter/receiver circuit, etc., which are explained based on common understanding in the technical field related to the present disclosure. be able to.

The transmitting/receiving section 120 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section. The transmitting section may include a transmitting processing section 1211 and an RF section 122. The reception section may include a reception processing section 1212, an RF section 122, and a measurement section 123.

The transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.

The transmitter/receiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitter/receiver 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.

The transmitting/receiving unit 120 may form at least one of a transmitting beam and a receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

The transmitting/receiving unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

The transmitting/receiving unit 120 (transmission processing unit 1211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, and discrete Fourier transform (DFT) on the bit string to be transmitted. A baseband signal may be output by performing transmission processing such as processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion.

The transmitting/receiving unit 120 (RF unit 122) may perform modulation, filter processing, amplification, etc. on the baseband signal in a radio frequency band, and may transmit the signal in the radio frequency band via the transmitting/receiving antenna 130. .

On the other hand, the transmitting/receiving section 120 (RF section 122) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.

The transmitting/receiving unit 120 (reception processing unit 1212) performs analog-to-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) processing (if necessary), applying reception processing such as filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing, User data etc. may also be acquired.

The transmitting/receiving unit 120 (measuring unit 123) may perform measurements regarding the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal. The measurement unit 123 is the receiving power (for example, the Reference Signal Received Power (RSRP)), the receiving quality (eg, the Reference Signal Received Quality (RSRQ), Signal To Interference Plus Noi. SE RATIO (SINR), Signal to Noise Ratio (SNR) , signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), etc. may be measured. The measurement results may be output to the control unit 110.

The transmission path interface 140 transmits and receives signals (backhaul signaling) between devices included in the core network 30 (for example, network nodes providing NF), other base stations 10, etc., and provides information for the user terminal 20. User data (user plane data), control plane data, etc. may be acquired and transmitted.

Note that the transmitting unit and receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140.

The transmitter/receiver 120 may transmit downlink control information (DCI) that includes an SRS request field for requesting a sounding reference signal (SRS) and indicates that the uplink shared channel is not transmitted. The control unit 110 may control reception of the transmitted signal based on ignoring fields other than a specific field in the DCI.

(user terminal)
FIG. 4 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control section 210, a transmitting/receiving section 220, and a transmitting/receiving antenna 230. Note that one or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.

Note that this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit 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 will be explained based on common recognition in the technical field related to the present disclosure.

The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception using the transmitting/receiving unit 220 and the transmitting/receiving antenna 230, measurement, and the like. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as a signal, and may transfer the generated data to the transmitting/receiving unit 220.

The transmitting/receiving section 220 may include a baseband section 221, an RF section 222, and a measuring section 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field related to the present disclosure.

The transmitting/receiving section 220 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section. The transmitting section may include a transmitting processing section 2211 and an RF section 222. The reception section may include a reception processing section 2212, an RF section 222, and a measurement section 223.

The transmitting/receiving antenna 230 can be configured from an antenna, such as an array antenna, as described based on common recognition in the technical field related to the present disclosure.

The transmitter/receiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitter/receiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.

The transmitting/receiving unit 220 may form at least one of a transmitting beam and a receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

The transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (e.g. RLC retransmission control), MAC layer processing (e.g. , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmitting/receiving unit 220 (transmission processing unit 2211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, DFT processing (as necessary), and IFFT processing on the bit string to be transmitted. , precoding, digital-to-analog conversion, etc., and output a baseband signal.

Note that whether or not to apply DFT processing may be based on the settings of transform precoding. When transform precoding is enabled for a certain channel (for example, PUSCH), the transmitting/receiving unit 220 (transmission processing unit 2211) performs the above processing in order to transmit the channel using the DFT-s-OFDM waveform. DFT processing may be performed as the transmission processing, or if not, DFT processing may not be performed as the transmission processing.

The transmitting/receiving unit 220 (RF unit 222) may perform modulation, filter processing, amplification, etc. on the baseband signal in a radio frequency band, and may transmit the signal in the radio frequency band via the transmitting/receiving antenna 230. .

On the other hand, the transmitting/receiving section 220 (RF section 222) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.

The transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, and decoding (error correction) on the acquired baseband signal. (which may include decoding), MAC layer processing, RLC layer processing, and PDCP layer processing may be applied to obtain user data and the like.

The transmitting/receiving unit 220 (measuring unit 223) may perform measurements regarding the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement results may be output to the control unit 210.

Note that the transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.

The transmitter/receiver 220 may receive downlink control information (DCI) that includes an SRS request field for requesting a sounding reference signal (SRS) and indicates that the uplink shared channel is not to be transmitted. The control unit 210 may ignore fields other than a specific field in the DCI.

The controller 210 may report the ability of the DCI to support requesting the SRS, not requesting channel state information, and not scheduling the uplink shared channel.

The specific field may be at least one of a field for requesting channel state information, the SRS request field, and an SRS offset indicator field regarding the slot offset of the SRS transmission.

The value of the channel state information request field in the DCI may be non-zero and there is no reporting amount associated with the value, or the value may be zero.

(Hardware configuration)
It should be noted that the block diagram used to explain the above embodiment shows blocks in functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices. The functional block may be realized by combining software with the one device or the plurality of devices.

Here, functions include judgment, decision, judgement, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and consideration. , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (configuration unit) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.

For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 5 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. .

Note that in this disclosure, words such as apparatus, circuit, device, section, unit, etc. can be read interchangeably. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is illustrated, there may be multiple processors. Also, the processing may be performed by one processor, or the processing may be performed by two or more processors simultaneously, sequentially, or using other techniques. Note that the processor 1001 may be implemented using one or more chips.

Each function in the base station 10 and the user terminal 20 is performed by, for example, loading predetermined software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations and communicates via the communication device 1004. This is achieved by controlling at least one of reading and writing data in the memory 1002 and storage 1003.

The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic unit, registers, and the like. For example, at least a portion of the above-mentioned control unit 110 (210), transmitting/receiving unit 120 (220), etc. may be realized by the processor 1001.

Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes in accordance with these. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks may also be realized in the same way.

The memory 1002 is a computer-readable recording medium, and includes at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. It may be composed of one. Memory 1002 may be called a register, cache, main memory, or the like. The memory 1002 can store executable programs (program codes), software modules, and the like to implement a wireless communication method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM), etc.), a digital versatile disk, removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. It may be configured by Storage 1003 may also be called an auxiliary storage device.

The communication device 1004 is hardware (transmission/reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc., for example. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be configured to include. For example, the above-described transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004. The transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).

The input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses for each device.

The base station 10 and user terminal 20 also include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.

(Modified example)
Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal may be interchanged. Also, the signal may be a message. The reference signal may also be abbreviated as RS, and may be called a pilot, pilot signal, etc. depending on the applicable standard. Further, a component carrier (CC) may 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. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, and radio frame configuration. , a specific filtering process that the transceiver performs in the frequency domain, a specific windowing process that the transceiver performs in the time domain, etc.

A slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Further, a slot may be a time unit based on numerology.

A slot may include multiple mini-slots. Each minislot may be made up of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot. PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.

Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.

For example, one subframe may be called a TTI, a plurality of consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), a code block, a codeword, etc., or may be a processing unit of scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI that is shorter than the normal TTI may be referred to as an abbreviated TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

Note that long TTI (for example, normal TTI, subframe, etc.) may be read as TTI with a time length exceeding 1 ms, and short TTI (for example, short TTI, etc.) It may also be read as a TTI having the above TTI length.

A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be 12, for example. The number of subcarriers included in an RB may be determined based on numerology.

Additionally, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

Note that one or more RBs include a physical resource block (Physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, and an RB. They may also be called pairs.

Additionally, a resource block may be configured by one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (also called partial bandwidth, etc.) refers to a subset of consecutive common resource blocks (RB) for a certain numerology in a certain carrier. Good too. Here, the common RB may be specified by an RB index based on a common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or more BWPs may be configured within one carrier for a UE.

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 of the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

Note that the structures of the radio frame, subframe, slot, minislot, symbol, etc. described above are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB, The number of subcarriers, the number of symbols within a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

Further, the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values from a predetermined value, or other information using corresponding information. may be expressed. For example, radio resources 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 mathematical formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable designation, the various names assigned to these various channels and information elements are not in any way exclusive designations. .

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of

Additionally, information, signals, etc. may be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layer. Information, signals, etc. may be input and output via multiple network nodes.

Input/output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Information, signals, etc. that are input and output can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

Notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods. For example, the notification of information in this disclosure may be physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper 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 thereof It may be carried out by

Note that the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc. Further, RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like. Further, MAC signaling may be notified using, for example, a MAC Control Element (CE).

Further, notification of prescribed information (for example, notification of "X") is not limited to explicit notification, but may be made implicitly (for example, by not notifying the prescribed information or by providing other information) (by notification).

The determination may be made by a value expressed by 1 bit (0 or 1), or by a boolean value expressed by true or false. , may be performed by numerical comparison (for example, comparison with a predetermined value).

Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.

Additionally, software, instructions, information, etc. may be sent and received via a transmission medium. For example, if the software uses wired technology (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (such as infrared, microwave, etc.) to , a server, or other remote source, these wired and/or wireless technologies are included within the definition of a transmission medium.

The terms "system" and "network" used in this disclosure may be used interchangeably. "Network" may refer to devices (eg, base stations) included in the network.

In this disclosure, "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "Transmission Configuration Indication state (TCI state)", "space "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" are interchangeable. can be used.

In the present disclosure, "Base Station (BS)", "Wireless base station", "Fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission/Reception Point (TRP)", "Panel" , "cell," "sector," "cell group," "carrier," "component carrier," and the like may be used interchangeably. A base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.

A base station can accommodate one or more (eg, three) cells. If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is connected to a base station subsystem (e.g., an indoor small base station (Remote Radio Communication services can also be provided by the Head (RRH)). The term "cell" or "sector" refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.

In the present disclosure, a base station transmitting information to a terminal may be interchanged with the base station instructing the terminal to control/operate based on the information.

In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" are used interchangeably. can be done.

A mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , handset, user agent, mobile client, client, or some other suitable terminology.

At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, or the like.

The moving body refers to a movable object, and the moving speed is arbitrary, and naturally includes cases where the moving body is stopped. The mobile objects include, for example, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, and ships (ships and other watercraft). , including, but not limited to, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and items mounted thereon. Furthermore, the mobile object may be a mobile object that autonomously travels based on a travel command.

The moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (manned or unmanned). ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

FIG. 6 is a diagram illustrating 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 (current sensor 50, (including 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 section 59, and a communication module 60. Be prepared.

The drive unit 41 is composed of, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor. The steering unit 42 includes at least a steering wheel (also referred to as a steering wheel), 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 includes a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input/output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control section 49 may be called an electronic control unit (ECU).

The signals from the various sensors 50 to 58 include a current signal from the current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheel 46/rear wheel 47 obtained by the rotation speed sensor 51, and a signal obtained by the air pressure sensor 52. air pressure signals of the front wheels 46/rear wheels 47, a vehicle speed signal acquired by the vehicle speed sensor 53, an acceleration signal acquired by the acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by the accelerator pedal sensor 55, and a brake pedal sensor. 56, a shift lever 45 operation signal obtained by the shift lever sensor 57, and an object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc. There are signals etc.

The information service department 59 includes various devices such as car navigation systems, audio systems, speakers, displays, televisions, and radios that provide (output) various information such as driving information, traffic information, and entertainment information, and these devices. It consists of one or more ECUs that control the The information service unit 59 provides various information/services (for example, multimedia information/multimedia services) to the occupants of the vehicle 40 using information acquired from an external device via the communication module 60 or the like.

The information service unit 59 may include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accepts input from the outside, and an output device that performs output to the outside (for example, display, speaker, LED lamp, touch panel, etc.).

The driving support system unit 64 includes millimeter wave radar, Light Detection and Ranging (LiDAR), a camera, a positioning locator (for example, Global Navigation Satellite System (GNSS), etc.), and map information (for example, High Definition (HD)). maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., inertial measurement units (IMUs), inertial navigation systems (INS), etc.), artificial intelligence ( Artificial Intelligence (AI) chips, AI processors, and other devices that provide functions to prevent accidents and reduce the driver's driving burden, as well as one or more devices that control these devices. It consists of an ECU. Further, the driving support system section 64 transmits and receives various information via the communication module 60, and realizes a driving support function or an automatic driving function.

The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 communicates via the communication port 63 with 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, which are included in the vehicle 40. Data (information) is transmitted and received between the axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58.

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 external devices. For example, various information is transmitted and received with an 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 base station 10, user terminal 20, etc. described above. Further, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (it may function as at least one of the base station 10 and the user terminal 20).

The communication module 60 receives signals from the various sensors 50 to 58 described above that are input to the electronic control unit 49, information obtained based on the signals, and input from the outside (user) obtained via the information service unit 59. At least one of the information based on the information may be transmitted to an external device via wireless communication. The electronic control unit 49, various sensors 50-58, information service unit 59, etc. may be called an input unit that receives input. For example, 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, inter-vehicle information, etc.) transmitted from an external device, and displays it on the information service section 59 provided in the vehicle. The information service unit 59 is an output unit that outputs information (for example, outputs information to devices such as a display and a speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60). may be called.

The communication module 60 also stores various information received from external devices into a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 controls the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, and left and right rear wheels provided in the vehicle 40. 47, axle 48, various sensors 50-58, etc. may be controlled.

Additionally, the base station in the present disclosure may be replaced by a user terminal. For example, communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the user terminal 20 may have the functions that the base station 10 described above has. Further, words such as "uplink" and "downlink" may be replaced with words corresponding to inter-terminal communication (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may be replaced with sidelink channels.

Similarly, the user terminal in the present disclosure may be replaced with a base station. In this case, the base station 10 may have the functions that the user terminal 20 described above has.

In this disclosure, the operations performed by the base station may be performed by its upper node in some cases. In a network that includes one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (e.g. It is clear that this can be performed by a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc. (though not limited thereto), or a combination thereof.

Each aspect/embodiment described in this disclosure may be used alone, in combination, or may be switched and used in accordance with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure use an example order to present elements of the various steps and are not limited to the particular order presented.

Each aspect/embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is an integer or decimal number, for example)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802 .11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods. The present invention may be applied to systems to be used, next-generation systems expanded, modified, created, or defined based on these systems. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G) may be applied.

As used in this disclosure, the phrase "based on" does not mean "based solely on" unless explicitly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

As used in this disclosure, any reference to elements using the designations "first," "second," etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, 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 any way.

The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "judgment" can mean judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry ( For example, searching in a table, database, or other data structure, ascertaining, etc. may be considered to be "determining."

In addition, "judgment (decision)" includes receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), access ( may be considered to be "determining", such as accessing data in memory (eg, accessing data in memory).

In addition, "judgment" is considered to mean "judging" resolving, selecting, choosing, establishing, comparing, etc. Good too. In other words, "judgment (decision)" may be considered to be "judgment (decision)" of some action.

Furthermore, "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

The "maximum transmit power" described in this disclosure may mean the maximum value of transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the It may also mean rated UE maximum transmit power).

As used in this disclosure, the terms "connected", "coupled", or any variations thereof refer to any connection or coupling, direct or indirect, between two or more elements. can 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 elements may be physical, logical, or a combination thereof. For example, "connection" may be replaced with "access."

In this disclosure, when two elements are connected, they may be connected using one or more wires, cables, printed electrical connections, etc., as well as in the radio frequency domain, microwave can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the light (both visible and invisible) range.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may also be interpreted similarly to "different."

Where "include", "including" and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising". It is intended that Furthermore, the term "or" as used in this disclosure is not intended to be exclusive or.

In this disclosure, when articles are added by translation, such as a, an, and the in English, the present disclosure may include that the nouns following these articles are plural.

In the present disclosure, "less than or equal to", "less than", "more than", "more than", "equal to", etc. may be read interchangeably. In addition, in this disclosure, "good", "bad", "large", "small", "high", "low", "early", "slow", "wide", "narrow", etc. The words are not limited to the original, comparative, and superlative, and may be interpreted interchangeably. In addition, in this disclosure, words meaning "good", "bad", "large", "small", "high", "low", "early", "slow", "wide", "narrow", etc. may be interpreted as an expression with "the i-th" (i is any integer), not only in the elementary, comparative, and superlative, but also interchangeably (for example, "the highest" can be interpreted as "the i-th highest"). may be read interchangeably).

In this disclosure, "of", "for", "regarding", "related to", "associated with", etc. are used to refer to each other. It may be read differently.

Although the invention according to the present disclosure has been described in detail above, it is clear for those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention as determined based on the claims. Therefore, the description of the present disclosure is for the purpose of illustrative explanation and does not have any limiting meaning on the invention according to the present disclosure.

Claims

a receiving unit that receives downlink control information (DCI) that includes an SRS request field for requesting a sounding reference signal (SRS) and indicates that the uplink shared channel is not transmitted;
A terminal comprising: a control unit that ignores fields other than a specific field in the DCI.
The terminal according to claim 1, wherein the control unit reports the ability of the DCI to support requesting the SRS, not requesting channel state information, and not scheduling the uplink shared channel.
The specific field is at least one of a field for requesting channel state information, the SRS request field, and an SRS offset indicator field regarding the offset of the slot of the transmission of the SRS. terminal.
The terminal according to claim 1, wherein the value of the channel state information request field in the DCI is non-zero and there is no reporting amount associated with the value, or the value is zero.
receiving downlink control information (DCI) including an SRS request field for a request for a sounding reference signal (SRS) and indicating not to transmit the uplink shared channel;
A wireless communication method for a terminal, comprising the step of ignoring fields other than a specific field in the DCI.
a transmitter that transmits downlink control information (DCI) that includes an SRS request field for requesting a sounding reference signal (SRS) and indicates that the uplink shared channel is not transmitted;
A base station comprising: a control unit that controls reception of a transmitted signal based on ignoring fields other than a specific field in the DCI.