CN114208328A

CN114208328A - Terminal and wireless communication method

Info

Publication number: CN114208328A
Application number: CN201980099173.4A
Authority: CN
Inventors: 松村祐辉; 柿岛佑一; 永田聪
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2022-03-18
Also published as: WO2021024483A1

Abstract

A terminal according to an embodiment of the present disclosure includes: a reception unit configured to receive setting information of a first resource of a Sounding Reference Signal (SRS) indicating zero power; and a control unit configured not to map uplink transmission in at least a part of second resources given to the uplink transmission when the second resources overlap with the first resources. According to one aspect of the present disclosure, processing is appropriately performed when a resource given to uplink transmission overlaps with a resource given to SRS.

Description

Terminal and wireless communication method

Technical Field

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

Background

In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high data rate, low latency, and the like (non-patent document 1). In addition, LTE-Advanced (3GPP rel.10-14) is standardized for the purpose of further large capacity, Advanced, and the like of LTE (Third Generation Partnership Project (3GPP)) versions (Release (Rel.))8, 9).

Successor systems to LTE (e.g., also referred to as a 5th generation mobile communication system (5G)), 5G + (plus), New Radio (NR), 3GPP rel.15 and beyond) are also being studied.

In an existing LTE system (e.g., LTE rel.8-14), a User terminal (User Equipment (UE)) transmits an uplink signal. The Uplink Signal may include at least one of a Random Access Channel (Physical Random Access Channel (PRACH)), an Uplink Shared Channel (Physical Uplink Shared Channel (PUSCH)), an Uplink Control Channel (Physical Uplink Control Channel (PUCCH))), a Sounding Reference Signal (SRS)), a Demodulation Reference Signal (DM-RS) of a PUSCH or a PUCCH.

Documents of the prior art

Non-patent document

Non-patent document 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Radio Access (E-UTRA) and Evolved Universal Radio Access Network (E-UTRAN); (ii) an Overall description; stage 2(Release 8) ", 4 months 2010

Disclosure of Invention

Problems to be solved by the invention

In a future wireless communication system (for example, NR), a UE performs uplink transmission (for example, PUSCH, PUCCH, SRS, and the like).

However, the operation of the terminal in the case where the resource of the time and frequency given to the uplink transmission overlaps (overlap) the resource of the time and frequency given to the SRS is not clear. In such a case, if the terminal cannot properly process, there is a concern that system performance may deteriorate.

Therefore, an object of the present disclosure is to provide a terminal and a wireless communication method that appropriately perform processing when a resource assigned to uplink transmission overlaps with a resource assigned to SRS.

Means for solving the problems

A terminal according to an embodiment of the present disclosure includes: a reception unit configured to receive setting information of a first resource of a Sounding Reference Signal (SRS) indicating zero power; and a control unit configured not to map uplink transmission in at least a part of second resources given to the uplink transmission when the second resources overlap with the first resources.

Effects of the invention

According to one aspect of the present disclosure, when a resource given to uplink transmission overlaps with a resource given to SRS, processing is appropriately performed.

Drawings

Fig. 1A and 1B illustrate an example of a Comb structure of SRS.

Fig. 2 is a diagram illustrating an example of overlapping of resources for an uplink channel and resources for an SRS.

Fig. 3A and 3B are diagrams illustrating an example of a method for controlling resources for an uplink channel and resources for an SRS.

Fig. 4 is a diagram showing an example of transmission priority based on the type of uplink transmission.

Fig. 5A to 5C are diagrams illustrating an example of a method for controlling resources for an uplink channel and resources for an SRS.

Fig. 6 is a diagram illustrating an example of a Comb structure of SRS.

Fig. 7A to 7C are diagrams illustrating an example of a method for controlling resources for an uplink channel and resources for an SRS.

Fig. 8 shows an example of the Comb structure of SRS.

Fig. 9A to 9C are diagrams showing an example of a control method in first transmission (japanese: "initial transmission") and retransmission of an uplink channel.

Fig. 10A to 10C are diagrams showing an example of a control method in the initial transmission and the retransmission of the uplink channel.

Fig. 11A and 11B are diagrams illustrating an example of a control method in the initial transmission and the retransmission of the uplink channel.

Fig. 12 is a diagram illustrating an example of a method for controlling resources for an uplink channel and resources for an SRS over a plurality of slots.

Fig. 13 is a diagram illustrating an example of a method for controlling resources for an uplink channel and resources for an SRS over a plurality of slots.

Fig. 14 is a diagram illustrating an example of a method for controlling resources for an uplink channel and resources for an SRS over a plurality of slots.

Fig. 15 is a diagram illustrating an example of a method for controlling resources for an uplink channel and resources for an SRS over a plurality of slots.

Fig. 16 is a diagram illustrating an example of a method for controlling resources for an uplink channel and resources for an SRS over a plurality of slots.

Fig. 17A and 17B are diagrams illustrating an example in which resources of an uplink channel of a UE overlap with SRSs of other UEs.

Fig. 18A to 18C are diagrams showing an example of the Comb structure of the ZP-SRS.

Fig. 19A to 19C are diagrams illustrating an example of a control method in a case where resources for an uplink channel overlap with resources for a ZP-SRS.

Fig. 20A to 20C are diagrams showing an example of a control method in a case where resources for ZP-SRS and resources for NZP-SRS overlap.

Fig. 21 is a diagram illustrating an example of a control method in a case where resources for ZP-SRS and resources for NZP-SRS overlap.

Fig. 22 is a diagram illustrating an example of a control method in a case where resources of an uplink channel of a UE overlap with SRSs of other UEs.

Fig. 23 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment.

Fig. 24 is a diagram showing an example of the configuration of a base station according to an embodiment.

Fig. 25 is a diagram showing an example of a configuration of a user terminal according to an embodiment.

Fig. 26 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment.

Detailed Description

(SRS)

In NR, a measurement Reference Signal (Sounding Reference Signal: SRS) is used in various applications. The NR SRS is used not only for UL Channel State Information (CSI) measurement used in the conventional LTE (LTE rel.8-14), but also for DL CSI measurement, beam management (beam management), and the like.

The UE may also be configured (configure) with one or more SRS resources. The SRS Resource can also be determined by an SRS Resource Indicator (SRI).

Each SRS Resource information element (SRS-Resource Information Element (IE)) may include the number of SRS ports (antenna ports) (may correspond to one or more SRS ports). For example, the number of antenna ports may be 1, 2, 4, etc.

Each SRS resource IE may include the number of OFDM symbols. For example, the number of OFDM symbols may be 1, 2, 4, or the like.

Each SRS resource IE may also contain a starting position l in the time domain₀。

Each SRS resource IE may also contain a starting position k in the frequency domain₀。

The UE may also be set with one or more SRS resource sets (SRS resource sets). One set of SRS resources may also be associated with a certain number of SRS resources. The UE may commonly use higher layer parameters with respect to SRS resources included in one SRS resource set. In the present disclosure, a resource set may be replaced with a resource group, or may be replaced with only a group or the like.

At least one of the information related to the set of SRS resources and the SRS resources may also be set to the UE using higher layer signaling, physical layer signaling, or a combination thereof.

The higher layer signaling may be one of RRC (Radio Resource Control) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof, for example.

For example, a MAC Control Element (CE), a MAC Protocol Data Unit (PDU), or the like may be used for the MAC signaling. The broadcast Information may be, for example, a Master Information Block (Master Information Block: MIB), a System Information Block (SIB), Minimum System Information (RMSI), Other System Information (OSI), or the like.

The physical layer signaling may be, for example, Downlink Control Information (DCI).

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

The SRS resource set setting information (for example, "SRS-resource set" of the RRC parameter) may include information on an SRS resource set ID (Identifier) (SRS-resource set ID), a list of SRS resource IDs (SRS-resource IDs) used in the resource set, an SRS resource type, and a usage (usage) of the SRS.

Here, the SRS resource type may also represent one of a Periodic SRS (Periodic SRS: P-SRS), a Semi-Persistent SRS (SP-SRS), and an Aperiodic SRS (A-SRS: A-SRS, AP-SPS). The UE may periodically (or after activation) transmit the P-SRS and the SP-SRS, or may transmit the a-SRS based on an SRS request of DCI.

The usage of the SRS ("use" of the RRC parameter, "SRS-setup" of the L1 (Layer 1(Layer-1)) parameter) may be, for example, beam management (beamManagement), codebook (codebook: CB), non-codebook (NCB), antenna switching (switching), or the like. Codebook or non-codebook used SRS may also be used for codebook based or non-codebook based PUSCH transmission precoder decisions based on SRI.

The SRS for beam management may be assumed to be transmitted immediately at a specific time for each SRS resource set, with only one SRS resource. In addition, when a plurality of SRS resources belong to different SRS resource sets, the SRS resources may be transmitted simultaneously.

For example, in the case of codebook-based transmission, the UE may determine a precoder to be used for PUSCH transmission based on the SRI, the Transmission Rank Indicator (TRI), and the Transmission Precoding Matrix Indicator (TPMI). In the case of non-codebook based transmission, the UE may determine a precoder used for PUSCH transmission based on the SRI.

The SRS Resource setting information (e.g., "SRS-Resource" of the RRC parameter) may include an SRS Resource ID (SRS-Resource ID), an SRS port number, a transmission Comb, SRS Resource mapping (e.g., a Resource position of at least one of time and frequency, a Resource offset, a Resource period, a number of repetitions, an SRS symbol number, an SRS bandwidth, etc.), hopping related information, an SRS Resource type, a sequence ID, spatial related information, and the like.

The UE may also transmit SRS in the last 6 symbols in one slot in adjacent symbols by the number of SRS symbols. The number of SRS symbols may be 1, 2, 4, or the like.

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

The SRS sequence may also be a low (low) Peak-to-Average Power ratio (PAPR)) sequence. Sending Comb number K_TCMay also be included in higher layer parameters (e.g., transmissionComb).

The low PAPR sequence may be a Constant Amplitude Zero Auto Correlation (CAZAC) sequence or a sequence based on the CAZAC sequence (e.g., a computer-generated sequence (cgs)). CGS may also be specified in a specification (e.g., a table).

IFDMA (Interleaved Frequency Division Multiple Access) using Comb2 (SRS configuring 1 RE for every 2 resource elements (REs, subcarriers)) or Comb4 (SRS configuring 1 RE for every 4 REs) as a transmission Comb of SRS, and Cyclic Shift (CS) may also be applied.

In the Comb structure with Comb value (value) n, the Comb offset may take one of integers from 0 to n-1. As for the structure of Comb2(Comb value is 2), Comb offset may be {0, 1 }. Fig. 1A shows the cases where Comb offsets are {0, 1 }. In addition, regarding the structure of Comb4(Comb value is 4), Comb offset may be any one of {0, 1, 2, and 3 }. Fig. 1B shows the cases where Comb offsets are {0, 1, 2, and 3}, respectively.

In the present disclosure, Comb offset, Comb index, and send Comb offset may be replaced with each other.

With respect to CS, in the case of Comb2, for antenna port p_iCyclic Shift (CS) number (CS index) n of (1)_SRS ^cs,iOne of {0, 1, 2, 3, 4, 5, 6, 7} values can be taken. In the case of Comb4, for antenna port p_iCS number n of_SRS ^cs,iOne of {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} values can be taken. With respect to antenna port p_iValue of CS alpha_iUsing CS number n_SRS ^cs,iAnd maximum number n of CS numbers_SRS ^cs,maxGiven as 2 n ═ 12_SRS ^cs,i/n_SRS ^cs,max. In the case of using Comb2 and CS, a maximum of 2 × 8 — 16 UEs can be multiplexed. In the case of using Comb4 and CS, a maximum of 4 × 12 ═ 48 UEs can be multiplexed. Multiple CSs may also be set for different UEs or may be associated with different SRS ports.

(overlap of UL transmission resources with each other)

In rel.15, REs corresponding to PUSCH within a PRB corresponding to PUSCH are not used for DMRSs associated with PUSCH, PTRS, and DMRSs for other co-scheduled UEs (other co-scheduled UEs). The DMRSs for other co-scheduled UEs may also be DMRSs configured at a comb different from the comb of the DMRS associated with the PUSCH.

In rel.15, for SRS and PUCCH on the same carrier, the UE does not transmit SRS in the case where one of periodic (p) -SRS or semi-persistent (sp) -SRS, and PUCCH carrying only Channel State Information (CSI) or only Reference Signal Received Power (L1-RSRP) in Layer 1 are set to the same symbol. In addition, when transmission of a P-SRs or an SP-SRs is set in the same symbol as a PUCCH carrying a HARQ-ACK (Hybrid Automatic Repeat reQuest ACKnowledgement) or a Scheduling ReQuest (SR), or when transmission of an aperiodic (a) -SRs is triggered, the UE does not transmit the SRs. When the SRS is not transmitted due to overlapping (repetition) with the PUCCH, only the SRS symbol overlapping with the PUCCH is discarded (drop). In case that a-SRS is triggered to be transmitted overlapping in the same symbol with a PUCCH carrying only an SP or P-CSI report or an SP or P-L1-RSRP report, the PUCCH is not transmitted.

On the other hand, in case that the a-SRS overlaps with a PUCCH used for semi-persistent CSI reporting or periodic CSI reporting, the UE does not transmit the PUCCH.

In 3GPP rel.15, simultaneous transmission of SRS and UL channel (PUSCH or PUCCH) in Intra-band carrier aggregation (Intra-band carrier aggregation) and Inter-band carrier aggregation (Inter-band carrier aggregation) is not allowed. The UE does not expect to be set with SRS from one carrier and PUSCH or UL DM-RS or UL PT-RS or PUCCH format from a different carrier of the same symbol.

However, the operation of the UE in the case where the set SRS resource overlaps with the scheduled or set PUSCH is not clear. Further, the operation of the UE in the case where the set SRS resource overlaps with the scheduled or set PUCCH has not been sufficiently studied.

A case where the set SRS resource overlaps with the scheduled or set UL channel resource will be described. In the example of fig. 2, the SRS resource of Comb2 that is set overlaps with the final symbol of the scheduled PUSCH. The processing in such a case is not specified in rel.15, so UE operation is not explicit.

On the other hand, studies are being made on the use of frequency hopping or Comb for SRS and the use of PUSCH over multiple slots or the like. In this way, when UL transmission uses complicated resources, the base station schedules the PUSCH so that the SRS and the PUSCH do not overlap, which reduces the flexibility of scheduling and increases the load of the base station.

In such a case, if the UE cannot properly process the UL channel and the SRS, there is a concern that system performance may deteriorate.

Therefore, the inventors of the present invention have conceived a method of appropriately processing the UL channel and the SRS in a case where the resource for the UL channel overlaps the resource for the SRS.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The radio communication methods according to the respective embodiments may be applied individually or in combination.

(Wireless communication method)

In the present disclosure, UL transmission, SRS, PUSCH, PUCCH, UCI may also be replaced with each other.

In the present disclosure, UL channel, PUSCH, PUCCH, UCI may also be replaced with each other.

In the present disclosure, the slot, sub-slot, mini-slot, sub-frame, period, time field may be replaced with each other.

In the present disclosure, UL transmission is not performed, drop (drop) UL transmission, interruption (cancel) UL transmission, all UL transmission is not transmitted, and all resources set or scheduled for UL transmission are not used.

In the present disclosure, transmitting a portion of the UL transmission, puncturing the UL transmission, rate matching the UL transmission, mapping the UL transmission in a portion of the resources set or scheduled for the UL transmission, and not mapping the UL transmission in a portion of the resources set or scheduled for the UL transmission may be replaced with each other. In the present disclosure, puncturing or rate matching of UL transmission in a specific resource, puncturing or rate matching of UL transmission around a specific resource, not mapping UL transmission in a specific resource, and not mapping UL transmission in a specific resource among resources set for UL transmission may be replaced with each other.

In the present disclosure, UL channel resources, resources given to the UL channel, resources set or scheduled or triggered for the UL channel, a range of resources for time and frequency of the UL channel, Resource Elements (REs) for the UL channel may also be replaced with one another. In the present disclosure, SRS resources, resources given to SRS, resources set or scheduled or triggered for SRS, ranges of resources of time and frequency for SRS, REs for SRS may be replaced with each other. In the present disclosure, UL transmission resources, resources given to UL transmission, resources set or scheduled or triggered for UL transmission, a range of resources of time and frequency for UL transmission, REs for UL transmission may also be replaced with one another.

In the present disclosure, resources set for SRS (e.g., NZP-SRS or ZP-SRS), SRS resource ranges, the entire band of SRS resources, all REs in the time and frequency ranges of SRS resources, and REs based on all Comb offsets may be replaced with each other.

In the present disclosure, the configuration, location, allocation (allocation), mapping, pattern, location within the slot and within the PRB, symbol location and subcarrier location may also be substituted for each other.

In the present disclosure, the type of UL transmission, and the content of UL transmission may be replaced with each other.

The embodiments may be applied to the overlapping of the PUSCH and the SRS, and may also be applied to the overlapping of the PUCCH and the SRS.

< embodiment 1>

When the SRS overlaps with the UL channel resource, the UE may not transmit a part or all of the SRS or the UL channel (may reduce the SRS or UL channel resource).

EXAMPLE 1-1

As shown in fig. 3, when resources of SRS and UL channel (e.g., PUSCH) overlap, the UE may transmit the UL channel without transmitting part or all of SRS (reducing SRS resources). For example, the UE may puncture the SRS, so as not to transmit a portion of the SRS that overlaps with the resource of the UL channel (e.g., PUSCH) (fig. 3A), or may discard the SRS that overlaps with the resource of the UL channel (e.g., PUSCH) (fig. 3B). In this case, transmission of the dynamically scheduled UL channel can be preferentially secured, and a decrease in throughput can be suppressed.

When puncturing the SRS, the UE may (1) puncture an overlapping portion between the SRS and the UL channel after generating the transmission signal sequence before the discarding, or (2) generate the transmission signal sequence of the SRS with the transmission signal sequence length after the discarding. Further, the UE may switch between (1) and (2) to use in response to a notification from a network (e.g., a base station).

When the SRS overlaps with the UL channel resource, the UE may transmit the SRS without transmitting part or all of the UL channel. For example, the UE may not transmit the portion of the UL channel that overlaps with the SRS resource by rate matching or puncturing the UL channel, or may discard the UL channel. Here, the UE may also perform rate matching or puncturing on the UL channel according to embodiment 2. In this case, at least one of throughput improvement and quality improvement based on the SRS measurement can be achieved.

When the aperiodic (a) -SRS overlaps with the UL channel resource, the UE may transmit the a-SRS without transmitting a part or all of the UL channel. For example, the UE may not transmit the portion of the UL channel that overlaps with the resources of the a-SRS by rate matching or puncturing the UL channel, or may discard the UL channel. Here, the UE may also perform rate matching or puncturing on the UL channel according to embodiment 2. In this case, dynamically (dynamically) scheduled transmission of the a-SRS can be preferentially ensured, and at least one of throughput improvement and quality improvement based on SRS measurement can be achieved.

EXAMPLES 1 to 2

When the SRS and the UL channel resources overlap, the UE may determine which UL transmission of the SRS or the UL channel should be transmitted preferentially based on at least one of the following priority UL transmission determination methods 1 to 5.

[ priority UL Transmission decision method 1]

The UE may determine the UL transmission to be prioritized based on Downlink Control Information (DCI) scheduled or triggered SRS and the order of reception or detection of DCI scheduled or triggered UL channel.

The UE may also decide which of the scheduled or triggered SRS or UL channels to prioritize over the first received or detected DCI of the DCI scheduling or triggering SRS and the DCI scheduling or triggering UL channel.

For example, the UE may also decide to prioritize SRS in the case where DCI scheduling or triggering a-SRS is detected before DCI scheduling or triggering UL channel and resources of a-SRS and UL channel overlap. In this case, the UE may perform rate matching or puncturing on the UL channel in a portion of the UL channel overlapping with the SRS resource, and may transmit the UL channel and the SRS. Here, the UE may perform rate matching or puncturing on the UL channel based on at least one of embodiments 2-1 to 2-6 described later. In addition, in this case, the UE may also drop the UL channel and transmit the SRS. For example, the UE may also decide to prioritize the UL channel in the case where DCI scheduling or triggering a-SRS is detected later than DCI scheduling or triggering the UL channel and resources of the a-SRS and the UL channel overlap. In this case, the UE may also drop the A-SRS and transmit the UL channel. In these cases, the UE performs the processing of UL transmission corresponding to the DCI at the time point when the previous DCI is received, and thus can avoid interruption of the processing of UL transmission due to reception of the subsequent DCI.

Furthermore, the UE may also decide which of the scheduled or triggered SRS or UL channel to prioritize over the later received or detected DCI of the DCI scheduling or triggering SRS and the DCI scheduling or triggering UL channel. For example, the UE may decide to prioritize SRS in the case where DCI scheduling or triggering a-SRS is detected later than DCI scheduling or triggering UL channel and resources of a-SRS and UL channel overlap. In this case, the UE may perform rate matching or puncturing on the UL channel in a portion overlapping with the SRS resource in the UL channel, and may transmit the PUSCH and the SRS. Here, the UE may perform rate matching or puncturing on the UL channel based on at least one of embodiments 2-1 to 2-6 described later. In addition, in this case, the UE may also drop the UL channel and transmit the SRS. For example, the UE may also decide to prioritize the UL channel in cases where DCI scheduling or triggering a-SRS is detected before DCI scheduling or triggering the UL channel and resources of a-SRS and PUSCH overlap. In this case, the UE may also drop the A-SRS and transmit the UL channel. In these cases, the UE determines that the UL transmission scheduled or triggered later is more important than the UL transmission scheduled or triggered earlier, and thus can interrupt the processing of the UL transmission scheduled or triggered earlier and preferentially perform the processing of the more important UL transmission.

[ priority UL Transmission decision method 2]

In the case where the resources of the SRS or UL channel overlap, the UE may determine which UL of the SRS or UL channel to transmit with priority based on the type of search space used for scheduling of at least one of the SRS and UL channel or detection of triggered DCI (e.g., Common Search Space (CSS)), UE-specific search space (USS)).

For example, the UE may also preferentially transmit UL transmissions that are scheduled or triggered by DCI detected in the CSS. Further, for example, the UE may also preferentially transmit an SRS or UL channel scheduled or triggered by DCI detected in the USS.

[ priority UL Transmission decision method 3]

When the resources of the SRS or UL channel overlap, the UE may determine to prioritize transmission of one UL of the SRS or UL channel based on an index of a cell or CC used for scheduling of at least one of the SRS and UL channel or detection of a triggered DCI.

The UE may also preferentially transmit at least one of an SRS or an UL channel scheduled or triggered by DCI detected in a cell with a smaller component carrier (CC, serving cell) index or a primary cell (PCell). In addition, at least one of the SRS or UL channel scheduled or triggered by the DCI detected in the cell with the large CC index may be preferentially transmitted.

[ priority UL Transmission decision method 4]

When the resources of the SRS and UL channels overlap, the UE may determine whether to prioritize UL transmission on one of the SRS and UL channels based on the respective categories of the SRS and UL channels.

The category of UL transmission may also be defined by at least one of transmission timing of one of periodicity (p), semi-persistence (sp), aperiodicity (a), and content carried through the UL channel. The SRS can be one of P-SRS, SP-SRS, and A-SRS. The PUCCH may be any one of a PUCCH (periodic PUCCH) transmitted periodically such as P-CSI report, a PUCCH (semi-persistent PUCCH) transmitted semi-persistently such as HARQ-ACK transmitted for SP-CSI report, DL-semi-persistent (SPs), and a PUCCH (aperiodic PUCCH) transmitted aperiodically such as SR, HARQ-ACK, a-CSI report. The PUSCH category may be any of a PUSCH (periodic PUSCH) transmitted periodically such as a type 1 granted (configured granted) PUSCH, a PUSCH (semi-persistent PUSCH) transmitted semi-persistently such as a type 2 granted PUSCH, and a PUSCH (aperiodic PUSCH) transmitted aperiodically such as a dynamic granted (dynamic granted) PUSCH. The content carried over the UL channel may also be UCI type (SR, HARQ-ACK, CSI (e.g., P-CSI report, SP-CSI report, a-CSI report)). The UCI may be carried through a PUCCH or may be carried through a PUSCH.

As shown in fig. 4, it may be defined which UL transmission is prioritized based on the SRS type and PUCCH type. For example, when the resources of the a-SRS overlap with the resources of the aperiodic PUCCH, the UE may prioritize the aperiodic PUCCH (may drop, puncture, or rate-match the aperiodic PUCCH to transmit the entire a-SRS). For example, when the resources of the a-SRS overlap with the resources of the periodic PUCCH, the UE may prioritize the a-SRS (the periodic PUCCH may be dropped or punctured, and the entire a-SRS may be transmitted). For example, when the resources of the P-SRS overlap with the resources of the periodic PUCCH, the UE may prioritize the periodic PUCCH (may drop or puncture the P-SRS and transmit the entire periodic PUCCH).

Priorities for the SRS class and the UL channel (PUCCH, UCI, PUSCH, etc.) class may also be specified. The UE may prioritize UL transmission with a smaller priority (priority order) value or may prioritize UL transmission with a larger priority value.

The order of aperiodic UL transmission, semi-persistent UL transmission, and periodic UL transmission may be prioritized. Next, when the SRS and the PUCCH are of the same category, the PUCCH may be prioritized. For example, priorities 1 to 6 are associated with an aperiodic PUCCH, an A-SRS, a semi-persistent PUCCH, an SP-SRS, a periodic PUCCH, and a P-SRS, respectively, and the UE may prioritize UL transmission with a smaller priority value. For example, when the aperiodic PUCCH overlaps with the a-SRS, the UE may prioritize the a-SRS having a smaller priority value (the aperiodic PUCCH may be dropped, punctured, or rate-matched, and the entire a-SRS may be transmitted).

The priority may be given to the periodic UL transmission, the semi-persistent UL transmission, and the aperiodic UL transmission in this order.

It may also be that PUCCH or UCI is prioritized. For example, priorities 1 to 6 are associated with an aperiodic PUCCH, a semi-persistent PUCCH, a periodic PUCCH, an A-SRS, an SP-SRS, and a P-SRS, respectively, and the UE may prioritize UL transmissions having a smaller priority (priority order) value. For example, when the aperiodic PUCCH overlaps with the a-SRS, the UE may prioritize the aperiodic PUCCH having a small priority value (may drop or puncture the a-SRS and transmit the entire aperiodic PUCCH).

[ priority UL Transmission decision method 5]

When the SRS and the UL channel overlap each other in resource, the UE may determine to preferentially transmit either the SRS or the UL channel based on an index (relationship of indexes) associated with the SRS and the UL channel in resource.

For example, at least one of the UL channel and the SRS with a smaller time index, from among the SRS resource and the UL channel resource to be transmitted with priority, may be determined. For example, at least one of the SRS or the UL channel having a larger time index, from among the transmission resource for preferentially transmitting the SRS and the transmission resource for the PUSCH, may be determined. The time index may also be an index of a time resource at which UL transmission starts or ends. The time resource may also be one of a symbol, a mini-slot, a sub-slot, and a slot.

For example, at least one of the UL channel and the SRS with a smaller frequency index may be determined from among the SRS resource and the PUSCH resource to be transmitted preferentially. For example, at least one of the UL channel and the SRS with a larger frequency index may be determined from among the transmission resources for transmitting the SRS and the transmission resources for the PUSCH in priority. The frequency index may also be an index of the frequency resource at which UL transmission is lowest (start) or highest (end). The frequency resource may also be one of a subcarrier spacing, a Resource Element (RE), a Resource Block (RB), a CC, a cell, and a band.

According to embodiment 1, when the SRS resource overlaps with the UL channel resource, by not transmitting a part or all of one of the SRS and the UL channel, the other can be appropriately transmitted. Further, it is possible to appropriately decide whether to prioritize one of the SRS or UL channels.

< embodiment 2>

When the SRS overlaps with the UL channel resource, the UE may perform rate matching (or puncturing) for the UL channel (reduce the UL channel resource) and transmit the SRS and the UL channel.

When the SRS overlaps with the UL channel resource, the UE may perform rate matching (or puncturing) for the UL channel based on at least one of embodiments 2-1 to 2-6 below.

EXAMPLE 2-1

When the SRS overlaps with the UL channel resources, the UE may rate-match (or puncture) the UL channel in the REs used for SRS transmission, without using the REs used for SRS transmission for the UL channel and for the demodulation reference signals (DMRSs) for the UL channel. In the case where the SRS resource having the Comb structure is set to the UE, the REs used for transmission of the SRS are only the REs to which the SRS sequence is mapped.

For example, in fig. 5A, the SRS of Comb2 that is set overlaps with the final symbol of the scheduled PUSCH. In this case, in the REs used for transmission of the SRS, the PUSCH is rate-matched (or punctured), and the SRS and the PUSCH are transmitted.

In this case, it is possible to efficiently transmit while suppressing an increase in the coding rate of the UL channel to a minimum and suppressing a decrease in communication quality, and to improve the throughput of the UL channel.

EXAMPLE 2-2

When the SRS overlaps with the resources of the UL channel, the UE may rate-match (or puncture) the UL channel in the resources set for the SRS, without using the resources set for the SRS (SRS resource range) for transmission of the UL channel and the DMRS for the UL channel. When the SRS resource having the Comb structure is set to the UE, the SRS resource range includes not only REs used for transmission based on the value of the set Comb offset but also REs used for transmission based on another value of the Comb offset.

For example, in the example of fig. 5B, the scheduled PUSCH resources and the set SRS resources are the same as those of fig. 5A. In this case, in the SRS resource range, PUSCH is rate-matched (or punctured), and SRS and PUSCH are transmitted.

When the SRS resource of Comb4 is set, as shown in fig. 6, the SRS resource range includes all REs used for transmission with Comb offset 0 to 3 (there is a possibility that REs used for SRS transmission by a UE to which Comb offset is set and SRS transmission by another UE).

Among the SRS resources, resources that are not mapped to the UL channel due to rate matching or puncturing in the foregoing embodiment 2-2 are sometimes used for SRS of other UEs (e.g., SRS with different Comb offsets). Therefore, by using embodiment 2-2, even when SRSs of a plurality of UEs are multiplexed by Comb, it is possible to avoid contention or interference between the UL channel of a UE and SRSs of other UEs.

EXAMPLES 2 to 3

When the SRS overlaps with the UL channel resources, the UE may rate-match (or puncture) the UL channel in the SRS symbols (all REs within the SRS symbols) without using the SRS symbols for transmission of the DMRS for the UL channel and the UL channel.

For example, in the example of fig. 5C, the scheduled PUSCH resources and the set SRS resources are the same as those of fig. 5A. In this case, in the symbol (period) in which the SRS is set, the PUSCH is rate-matched (or punctured), and the SRS and the PUSCH are transmitted.

In this case, in the SRS symbol overlapping with the UL channel of a certain UE, another UE may transmit an SRS having a different length (bandwidth). By the fact that the UL channel is not mapped to the SRS symbol, contention or interference between the UL channel of the UE and SRS of other UEs can be avoided.

Frequency hopping of SRS

Even when the SRS with frequency hopping is set, the UE can perform rate matching or puncturing on the UL channel based on at least one of embodiments 2-1 to 2-3.

When SRS with frequency hopping is set and resources of the SRS and the UL channel overlap, the UE may perform rate matching (or puncturing) on the UL channel in the REs used for SRS transmission without using the REs used for SRS transmission for the UL channel and a demodulation reference signal (DMRS) for the UL channel. That is, the UL channel may be rate-matched or punctured based on the method of embodiment 2-1.

In fig. 7A, the SRS resource of the first hop (before hopping) and the SRS resource of the second hop (after hopping) are arranged in the same slot as the PUSCH resource, and the SRS resource of the second hop and the PUSCH resource overlap in the final symbol of the PUSCH resource. In this case, in the REs used for transmission of the SRS, the PUSCH is rate-matched (or punctured), and the SRS and the PUSCH are transmitted.

In addition, when SRS with frequency hopping is set and resources of the SRS and the UL channel overlap, the UE may perform rate matching (or puncturing) on the UL channel in the resources set for SRS, without using the resources set for SRS (SRS resource range) for transmission of the UL channel and DMRS for the UL channel. That is, the UL channel may be rate-matched or punctured based on the method of embodiment 2-2 described above. When the SRS resource having the Comb structure is set to the UE, the SRS resource set to be used for SRS includes not only REs used for transmission based on the value of the Comb offset set but also REs used for transmission based on other values of the Comb offset.

In the example of fig. 7B, the scheduled PUSCH resources and the set SRS resources are the same as in fig. 7A. In this case, in the SRS resource range, PUSCH is rate-matched (or punctured), and SRS and PUSCH are transmitted.

When the SRS with frequency hopping is set and the SRS overlaps with the resources of the UL channel, the UE may perform rate matching (or puncturing) on the UL channel in the SRS symbols (all REs within the SRS symbols) overlapping with the resources of the UL channel without using the SRS symbols for transmission of the DMRSs for the UL channel and the UL channel. That is, the UL channel may be rate-matched or punctured based on the method of embodiment 2-3 described above.

In the example of fig. 7C, the scheduled PUSCH resources and the set SRS resources are the same as in fig. 7A. In this case, in a symbol (period) in which SRS overlapping PUSCH resources is set, PUSCH is rate-matched (or punctured), and SRS and PUSCH are transmitted.

EXAMPLES 2 to 4

The UE may also be notified of information (object Comb) indicating in which resource of Comb the UL channel should be rate-matched (or punctured) differently from the resource used for SRS.

For example, the UE may also be notified of a bitmap indicating the Comb offset of the object Comb. The UE notified of the bitmap may perform rate matching or puncturing of the UL channel in the RE corresponding to the Comb offset indicated by the bitmap.

For example, the UE may be notified of the number of Comb that can be set for several UEs or other UEs, in the same manner as the number of Code Division Multiplexing (CDM) groups with no data for DMRS. The UE notified of the Comb number may determine the target Comb according to the selection rule. For example, regarding the selection rule, the UE may select, as the target Comb, the amount of Comb number to be always notified with priority from the time when the Comb offset amount is small (or large), or may select, as the target Comb, the amount of Comb offset from the time when the Comb offset amount is notified as the SRS resource to the time when the Comb offset amount is increased (or decreased) by the amount of Comb number to be notified. The UE may also maintain the Comb offset within the valid range when the Comb offset is outside the valid range due to the increase or decrease. For example, when the maximum Comb offset is exceeded by the increase, the UE may obtain the Comb offset by a remainder (modulo operation) of the maximum Comb offset based on the increase result.

The notification of the object Comb may be notified as part of the SRS resource by higher layer signaling, may be notified by a Medium Access Control (MAC) Control Element (CE)), or may be notified by DCI. For example, the notification may be performed by higher layer signaling in the case of P-SRS, by higher layer signaling and MAC CE in the case of SP-SRS, or by higher layer signaling and DCI in the case of a-SRS.

Fig. 8 shows a case where the UE is notified of Comb offset 0 as the SRS resource and notified of Comb offset 1 as the target Comb. In this case, Comb offset 0 indicates SRS resource (RE used for SRS transmission). Comb offset 1 indicates REs that are not used for SRS transmission but are rate-matched (or punctured) for PUSCH. Comb offset 2 and Comb offset 3 indicate REs that are not used for SRS transmission but are not rate-matched for PUSCH. That is, Comb offset 2 and Comb offset 3 indicate REs to which PUSCH is mapped when PUSCH is scheduled.

EXAMPLES 2 to 5

The UE may also apply one of the above-described embodiments 2-1, 2-2, 2-4 only in case the UL channel is a Cyclic Prefix (CP)) -OFDM (CP-OFDM waveform) to which no transform precoding is applied in the UL channel. In this case, the above-described embodiments 2-1, 2-2, and 2-4 can perform Frequency Division Multiplexing (FDM) on SRS transmission and UL channel transmission using a low Peak to Average Power Ratio (PAPR) sequence, and thus can suppress an increase in PAPR due to combining CP-OFDM and FDM.

In the case where the UL channel is a Discrete Fourier Transform-Spread (DFT-S) -OFDM (DFT-S-OFDM waveform) to which Transform precoding is applied in the UL channel, the UE may also apply the above-described embodiments 2 to 3. In this case, it is possible to suppress an increase in PAPR by combining DFT-S-OFDM and FDM.

EXAMPLES 2 to 6

In embodiments 2-1 and 2-2 described above, when the DMRS of the UL channel is punctured, the UE may generate a DMRS sequence having a DMRS sequence length before puncturing, or may generate a DMRS sequence having a sequence length corresponding to the size (number of REs) of resources that can be used after puncturing.

By generating a DMRS sequence (e.g., a low PAPR sequence) using the DMRS sequence length before puncturing, and puncturing the DMRS, when the DMRS is multiplexed with DMRSs of other UEs having the same sequence length, the DMRS sequences can be made orthogonal to each other, and interference between UEs can be suppressed. By transmitting a DMRS sequence having a sequence length corresponding to the size of a resource that can be used after puncturing, PAPR can be suppressed. A DMRS sequence having a sequence length corresponding to the size of a resource that can be used after puncturing may be defined in the specification. The UE may not expect that the size of the resource that can be used after puncturing is a sequence length that is not specified in the specification.

According to embodiment 2, when SRS resources overlap UL channel resources, UL channel resources are reduced, and thus UL channels and SRS can be transmitted appropriately.

< embodiment 3>

In the following embodiment 3, a method of controlling retransmission of the UL channel when the SRS resource overlaps with the UL channel resource will be described.

When the resource of the first transmission of the UL channel overlaps with the SRS resource, the UE may use any one of the methods of embodiments 3-1 to 3-3 below.

EXAMPLE 3-1

The UE may also control rate matching (or puncturing) of the UL channel for each transmission of the UL channel (in each of the first transmission and the retransmission) depending on whether the SRS resource overlaps with the UL channel resource. When the SRS resource overlaps with the UL channel resource, the UE may not use the overlapping resource (RE, SRS resource range, or SRS symbol) for transmission of the UL channel (may reduce the UL channel resource).

In each of the first transmission and the retransmission of the UL channel, when the UL channel resource overlaps with the SRS resource, the UE may transmit the UL channel and the SRS according to embodiment 2-1.

In the retransmission of the UL channel, when the UL channel resources do not overlap the SRS resources, the UE may use all of the UL channel resources for the retransmission of the UL channel or may use a part of the UL channel resources for the retransmission of the UL channel. At least one of a Transport Block Size (TBS), a resource size, and a number of coding bits may be the same between the first transmission and the retransmission of the UL channel. When the UL channel resource overlaps with the SRS resource in the first transmission of the UL channel and does not overlap with the SRS resource in the retransmission of the UL channel, the UE may reduce the size of the retransmitted UL channel resource (for example, at least one of the PRB size and the number of allocation symbols). The UE may reduce the size of the retransmitted UL channel resource by a certain size each time until the retransmitted TBS is equal to the first TBS. The specific size may be one Physical Resource Block (PRB) or one physical resource block group (PRG). The PRG may also be a consecutive PRB to which the same precoding of the DL is applied. The UE may also assume that the same precoding is applied for consecutive allocations of DL of multiple PRBs within the PRG.

In the example of fig. 9A, in the PUSCH initial transmission, as in fig. 5A described above, the PUSCH resource overlaps with the SRS resource (SRS #1), and the UE performs PUSCH initial transmission and SRS (SRS #1) transmission according to embodiment 2-1. Instead of embodiment mode 2-1, any of embodiment modes 2-2 and 2-3 may be used.

In the example of fig. 9B, when the PUSCH resource and the SRS resource do not overlap in the retransmission of the PUSCH of fig. 9A, the UE uses all the resources for the retransmission of the PUSCH. In other words, the UE uses the same arrangement (symbol position and subcarrier position) of REs overlapping with the SRS in the first resource of the PUSCH for retransmission of the PUSCH as well.

In the retransmission of the UL channel, when the UL channel resources overlap the SRS resources, the UE may use (map) the REs of the SRS in the retransmission resources of the UL channel not for the UL channel but for the REs not overlapping the SRS.

In the example of fig. 9C, when the PUSCH resource overlaps with the SRS resource in the retransmission of the PUSCH of fig. 9A and the arrangement of SRS #2 overlapping with the retransmission and the arrangement of SRS #1 overlapping with the initial transmission are different, the UE uses not the REs of SRS #2 in the retransmission resource of the PUSCH for the PUSCH but the REs not overlapping with the REs of SRS #2 for the PUSCH.

According to embodiment 3-1, the UE can efficiently transmit the UL channel when the first transmission of the UL channel overlaps with the SRS resource and the retransmission of the UL channel does not overlap with the SRS resource.

EXAMPLE 3-2

The UE may use, as the UL channel resource for retransmission, a resource for configuration for the first transmission of the UL channel (i.e., configuration and size of the UL channel rate-matched (or punctured) due to the overlap of the SRS and the first transmission UL channel).

In the retransmission of the UL channel, when the UL channel resource does not overlap the SRS resource, the UE may use the configuration for the first transmission of the UL channel for the retransmission of the UL channel. The UE may not use REs at the same positions as those not used for the first transmission for retransmission of the UL channel, when the REs overlapping with the SRS in the first transmission resource of the UL channel are not used for the UL channel. In this case, the UE may not use the same configured REs as those not used for the first transmission for retransmission of the UL channel, regardless of whether or not the retransmitted resources overlap the SRS resources.

In the example of fig. 10A, similar to fig. 9A, the UE performs PUSCH initial transmission and SRS (SRS #1) transmission according to embodiment 2-1.

In the example of fig. 10B, when the PUSCH resources and SRS resources do not overlap in the retransmission of the PUSCH of fig. 10A, the UE performs retransmission of the PUSCH without using, for retransmission of the PUSCH, REs having the same arrangement as the REs that are not used for the first transmission of the PUSCH of fig. 10A (rate matching or puncturing is performed on retransmission of the PUSCH at the same position as in fig. 10A).

In the retransmission of the UL channel, when the UL channel resources overlap the SRS resources, the UE may use, instead of using, for the retransmission of the UL channel, the REs having the same configuration as the REs not used for the initial transmission among the resources used for the retransmission of the UL channel, the REs having the same configuration as the REs used for the initial transmission for the retransmission of the UL channel (the retransmission of the PUSCH may be rate-matched or punctured at the same position as the initial transmission). Further, the UE may also drop SRS.

In the example of fig. 10C, when the PUSCH resources overlap the SRS resources in the retransmission of the PUSCH of fig. 10A and the arrangement of the SRS #2 overlapping the retransmission and the arrangement of the SRS #1 overlapping the initial transmission are different, the UE performs retransmission without mapping the PUSCH to the same arrangement of REs that are not used for the initial transmission of the PUSCH among the resources of the retransmission of the PUSCH, and discards the SRS # 2.

In addition, when the PUSCH resources overlap the SRS resources in the retransmission of the PUSCH in fig. 10A, and the arrangement of the SRS #2 overlapping the retransmission is the same as the arrangement of the SRS #1 overlapping the initial transmission, the UE does not map the PUSCH to the REs having the same arrangement as the REs not used for the initial transmission of the PUSCH among the resources of the retransmission of the PUSCH, performs the retransmission, and discards the SRS # 2.

According to embodiment 3-2, the TBS can be equalized between the first transmission and the retransmission of the UL channel.

EXAMPLES 3 to 3

In the retransmission of the UL channel, when the UL channel resources overlap the SRS resources, the UE may use, instead of using, for the retransmission of the UL channel, the REs having the same configuration as the REs not used for the initial transmission and the REs of the SRS in the resources for the retransmission of the UL channel, the other REs for the retransmission of the UL channel (the retransmission of the PUSCH may be rate-matched or punctured in the REs having the same configuration as the SRS at the initial transmission and the REs of the SRS at the retransmission). Further, the UE may transmit an SRS overlapping with the retransmission resource of the UL channel.

In the example of fig. 11A, similar to fig. 9A, the UE performs PUSCH initial transmission and SRS (SRS #1) transmission according to embodiment 2-1.

In the example of fig. 11B, when the PUSCH resources overlap the SRS resources in the retransmission of the PUSCH of fig. 11A and the arrangement of the SRS #2 overlapping the retransmission and the arrangement of the SRS #1 overlapping the initial transmission are different, the UE performs retransmission without mapping the PUSCH on the REs of the same arrangement as the REs not used for the initial transmission of the PUSCH and the REs of the SRS #2 in the retransmission resources of the PUSCH, and transmits the entire SRS # 2.

In addition, when the PUSCH resources overlap the SRS resources in the retransmission of the PUSCH in fig. 11A, and the arrangement of the SRS #2 overlapping the retransmission is the same as the arrangement of the SRS #1 overlapping the initial transmission, the UE retransmits the PUSCH without mapping the PUSCH on the REs having the same arrangement as the REs not used for the initial transmission of the PUSCH among the resources of the retransmission of the PUSCH, and transmits the entire SRS # 2.

According to embodiment 3-3, an SRS overlapping with retransmission of a PUSCH can be transmitted with priority.

< embodiment 4>

In the following embodiment 4, a description will be given of control in a case where a multi-slot UL channel overlaps with an SRS when the UL channel over a plurality of slots (multi-slot UL channel) is supported.

EXAMPLE 4-1

The UE may also control rate matching (or puncturing) of the UL channel for each transmission slot of the UL channel in the multi-slot UL channel based on whether the SRS resources overlap with the UL channel resources.

For example, when the SRS resource and the UL channel resource overlap, the UE may use the overlapping resource for transmission of the UL channel (or may not map the UL channel in the overlapping resource) according to at least one of embodiments 2-1 to 2-3, and when the SRS resource and the UL channel resource do not overlap, the UL channel resource may use the UL channel resource for transmission of the UL channel (or may map the UL channel in the UL channel resource).

For example, as shown in fig. 12, when the resource of PUSCH overlaps with the resource of SRS #1 in slot #2 and the resource of PUSCH overlaps with the resource of SRS #2 in slot #4, the UE may not map PUSCH to the REs where SRS #1 and #2 overlap (may rate-match or puncture PUSCH to the REs where SRS #1 and #2 overlap) according to embodiment 2-1.

EXAMPLE 4-2

The UE may not use REs that are not used for UL channel transmission (UL channel is not mapped) in the UL channel resources in the first time slot of the multi-slot UL channel for UL channels in the time slots subsequent to the first time slot (subsequent time slot, second subsequent time slot) (the UE may rate-match or puncture the UL channel in the subsequent time slot (subsequent time slot) in the same configuration as the REs that are not used for UL channel transmission in the UL channel resources in the first time slot). The UE may also use the configuration of the UL channel used in the UL channel of the first slot in the multi-slot UL channel for the UL channel of the subsequent slot. For the control of SRS overlapping with the transmission slot of the subsequent UL channel in this case, any one of the following subsequent slot transmission methods 1 to 3 may be used.

[ subsequent time slot transmission method 1]

In the subsequent slot, when the same configuration as the PUSCH transmission in the first slot overlaps with the SRS resource, the UE may always discard the overlapping SRS.

For example, as shown in fig. 13, when the PUSCH resource overlaps with the SRS #1 resource in the first slot (slot #1) of the multi-slot PUSCH and the PUSCH resource overlaps with the SRS #2 resource in slot #4, the UE does not map the PUSCH to the REs used for SRS #1 transmission in the PUSCH resource in slot #1, but maps the PUSCH to the other REs and transmits the PUSCH. In this case, the UE uses the configuration for PUSCH transmission in slot #1 for PUSCH transmission in slots #2 to #4 (in slots #2 to #4, PUSCH is mapped in the same configuration as PUSCH transmission in slot # 1). In slot #4, the UE discards SRS #2 overlapping with the PUSCH resource.

According to the subsequent slot transmission method 1, the TBS can be equalized for each slot, and the load on the UE can be suppressed.

[ subsequent time slot transmission method 2]

In the subsequent slot, when the REs of the SRS overlap with the REs of the same configuration as the PUSCH transmission in the first slot, the UE may discard the SRS. In the subsequent slot, the UE may transmit the SRS when the configured REs of the SRS and the configured REs of the PUSCH transmitted in the first slot do not overlap.

For example, in slot #4, as in the above-described fig. 13, when the REs in the same arrangement as in the PUSCH transmission in slot #1 overlap with the REs in SRS #2 (when the arrangement of the REs in SRS #2 is different from the arrangement of the REs in SRS #1), the UE discards SRS #2 as in fig. 13.

For example, as shown in fig. 14, in the PUSCH of slots #2 to #4, as in fig. 13, the same arranged REs as the PUSCH of slot #1 are used, but in slot #4, when the arranged REs do not overlap with the REs of SRS #2 (when the arrangement of the REs of SRS #2 is the same as the arrangement of the REs of SRS #1), the UE transmits the entire SRS # 2.

According to the subsequent slot transmission method 2, the TBSs can be equalized for each slot, and the load on the UE can be suppressed.

[ subsequent time slot transmission method 3]

In the subsequent slot, the UE may also transmit the SRS in the subsequent slot if the SRS resource overlaps with the UL channel resource. In this case, the UE may not use the REs of the same configuration as the REs of the SRS in the first slot (the REs not used for the UL channel transmission in the first slot) and the REs of the SRS for the UL channel transmission in the subsequent slot (may rate-match or puncture the UL channel in the REs of the same configuration as the SRS in the first slot and the REs of the SRS in the subsequent slot).

For example, as shown in fig. 15, in the same manner as in fig. 13 described above, in slot #4, when the REs in the same arrangement as the PUSCH transmission in slot #1 overlap with the REs in SRS #2 (when the arrangement of the REs in SRS #2 is different from the arrangement of the REs in SRS #1), the UE transmits the PUSCH and transmits SRS #2 without using the REs in the same arrangement as the REs in SRS #1 in slot #1 and the REs in SRS #2 in the PUSCH in slot # 4.

EXAMPLE 4-3

The UE may use the same allocated resources as the SRS resources (SRS resource ranges) overlapping with the UL channel resources in the multi-slot UL channel in at least one slot for transmission of the UL channel in all slots (may map the UL channel to the same allocated resources as the SRS resources overlapping with at least one slot in all slots and perform transmission of the UL channel) (may perform rate matching or puncturing on the UL channel in the same allocated resources as the SRS resources overlapping with at least one slot in all slots).

For example, as shown in fig. 16, when the PUSCH resource overlaps with the resource of SRS #1 in slot #1 and the PUSCH resource overlaps with the resource of SRS #2 in slot #4, the UE transmits the PUSCH and transmits the SRS #1 and #2 as a whole without using the resources of the same arrangement as the resources of SRS #1 and SRS #2 in the whole of slots #1 to # 4.

The UE may not use the configured REs identical to the REs of the SRS overlapping with the UL channel resources of at least one slot of the multi-slot UL channel for the UL channels of all slots of the multi-slot UL channel (may not map the configured REs identical to the REs of the SRS overlapping with the UL channel resources of at least one slot of the multi-slot UL channel to the UL channels of all slots of the multi-slot UL channel and transmit the UL channels) (may rate-match or puncture the UL channels of all slots of the multi-slot UL channel in the configured REs identical to the REs of the SRS overlapping with the UL channel resources of at least one slot of the multi-slot UL channel).

According to embodiment 4-3, after TBSs between slots can be made equal, SRS can be transmitted in any slot, and at least one of throughput improvement and quality improvement based on SRS measurement can be achieved.

EXAMPLES 4 to 4

In rel.15nr, SRS can be mapped into a maximum of 4 consecutive symbols (multi-symbol SRS). In rel.15nr, a short PUCCH (for example, PUCCH formats 0 and 2) mapped to 1 or 2 symbols is specified. Different spatial relationships (spatial relationships, beams, spatial domain transmit filters) may also be applied to the multiple symbols in the multi-symbol SRS.

When the multi-symbol SRS overlaps (contends) with the short PUCCH, the UE may perform processing according to one of the following processing methods 1 to 4.

[ treatment method 1]

When the multi-symbol SRS and the short PUCCH at least partially compete, the UE may perform rate matching or puncturing on the multi-symbol SRS or the short PUCCH only in the portion where the contention occurs. In this case, the UE may puncture the multi-symbol SRS and transmit the entire short PUCCH.

[ treatment method 2]

When the multi-symbol SRS and the short PUCCH at least partially compete, the multi-symbol SRS or the short PUCCH may be rate-matched or punctured only in the symbols that compete. In this case, the UE may puncture the multi-symbol SRS and transmit the entire short PUCCH.

[ treatment method 3]

The multi-symbol SRS may also be discarded when the multi-symbol SRS at least partially competes with the short PUCCH.

[ treatment method 4]

The short PUCCH may also be discarded when the multi-symbol SRS at least partially competes with the short PUCCH.

According to the above embodiments, UL transmission can be appropriately controlled even when resources of SRS and UL channel overlap.

< embodiment 5>

Since the SRS is transmitted in a wideband, the resource of the UL channel of a certain UE may overlap with the resource of the SRS of another UE.

For example, as shown in fig. 17A, consider a case where a PUSCH resource within one slot of UE #1 overlaps with an SRS resource of UE # 2. Further, as shown in fig. 17B, a case is considered in which PUSCH (multi-slot PUSCH) resources of the UE #1 over the slots #1 to #4 overlap with the SRS resources of the UE #2 in the slot #2 and the SRS resources of the UE #2 in the slot # 4.

In such a case, if the UE #1 cannot properly control the UL channel resource of the UE #1 overlapping with the SRS resource of the UE #2, the communication quality may deteriorate.

Therefore, the inventors of the present invention have conceived a method of appropriately controlling UL transmission resources overlapping SRS resources of other UEs.

The UE may be set with Zero Power (ZP)) and SRS resources in addition to SRS resources (Non-Zero Power (ZP)) -SRS resources). The NZP-SRS may be replaced with an SRS with non-zero power, an actually transmitted SRS, an SRS with transmission power, or the like. The ZP-SRS may be replaced with an SRS with zero power, an SRS that is not actually transmitted, an SRS with no transmission power, or the like.

The ZP-SRS resource may also be set (or may be received) to the UE by higher layer signaling (e.g., SRS setting information, SRS resource set setting information, SRS resource setting information, ZP-SRS resource set setting information, ZP-SRS resource setting information, etc.). The ZP-SRS resource may be notified as an SRS resource set or SRS resource to which a new usage (usage) is set, such as ZP-SRS (zeroPower), indicating a usage (for example) in the SRS resource set, or may be set or defined by a new parameter (for example, ZP-SRS resource set or ZP-SRS resource). The ZP-SRS resource may also be a resource accompanied by frequency hopping.

The ZP-SRS resources and the ZP-SRS resource sets containing the ZP-SRS resources can also be replaced mutually.

At least one of the NZP-SRS and the ZP-SRS may be set (mapped) to any symbol in the slot other than the last 4 symbols in the slot.

The ZP-SRS type (P-ZP-SRS, SP-ZP-SRS, A-ZP-SRS) may be defined in the same manner as the SRS type (P-SRS, SP-SRS, A-SRS). The class of ZP-SRS can also be set by higher layer signaling.

At least some of the activation and deactivation of the SP-ZP-SRS may also be controlled by at least some of the MAC layer signaling or the DCI.

It is also conceivable that a spatial relationship (spatial relationship) is not set for at least one of the ZP-SRS resource set or the resources. Note that Transmission Power Control (TPC) parameters (α, P0, and the like) may not be set.

The UE to which the ZP-SRS resource is set may not transmit SRS (NZP-SRS) in the ZP-SRS resource. Further, the UE to which the ZP-SRS resource is set may not transmit the PUSCH or the DMRS of the PUSCH in the ZP-SRS resource. Further, the UE to which the ZP-SRS resource is set may not transmit the PUCCH or the DMRS of the PUCCH in the ZP-SRS resource.

The UE to which the ZP-SRS resource is set may also transmit the PUCCH or the DMRS of the PUCCH in the ZP-SRS resource. In this case, the throughput of DL is improved.

The UE having the ZP-SRS resource set thereto may transmit a PUCCH including a specific type of Uplink Control Information (UCI) (e.g., HARQ-ACK) or a DMRS of the PUCCH. In this case, the throughput of DL is improved.

(structure of ZP-SRS)

The structure of the ZP-SRS may have a Comb structure, similar to the structure of SRS. As the Comb structure, one of Comb2 (ZP-SRS in which 1 RE is configured for every 2 REs, fig. 18A), Comb4 (ZP-SRS in which 1 RE is configured for every 4 REs, fig. 18B), and Comb-less (ZP-SRS is configured in all REs within a band (PRB, range) set by ZP-SRS resources, for example, Comb0, Comb value 0, fig. 18C) may be set to the UE. When a plurality of terminals, which are SRS resources and have different Comb offsets of the same time and frequency resources, perform SRS transmission, a UE can avoid overlapping of UL transmission of the UE and SRS corresponding to all Comb offsets of other UEs by being set without Comb.

As the ZP-SRS structure, the UE may have the same structure as the SRS structure of rel.15nr, or may have an SRS structure including rel.15nr. The UE can determine the ZP-SRS resources in the same way as the NZP-SRS resources.

In the case where the ZP-SRS overlaps with resources of the UL channel (e.g., at least one of the PUSCH and the PUCCH), the UE may also rate-match (or puncture) the UL channel and transmit the UL channel.

In at least one of embodiments 1 to 4 described above, the SRS may be replaced with ZP-SRS. In this case, REs indicated by the ZP-SRS resource or the Comb structure of the ZP-SRS resource may not be used for UL transmission (UL transmission may not be mapped) (UL transmission may not be dropped, punctured, or rate-matched among REs indicated by the ZP-SRS resource or the Comb structure of the ZP-SRS resource).

When the ZP-SRS and the UL channel overlap in resources, the UE may perform rate matching (or puncturing) on the UL channel based on one of embodiments 5-1 to 5-3 below.

EXAMPLE 5-1

When the ZP-SRS and the UL channel overlap in resources, the UE may not use REs overlapping with Resource Elements (REs) of the ZP-SRS for transmission of the DMRS for the UL channel (the UL channel may be rate-matched (or punctured) in the REs for which the ZP-SRS is valid). Here, REs in which ZP-SRS is valid are REs represented by Comb structures as shown in fig. 18A to 18C.

For example, as shown in fig. 19A, when the ZP-SRS resource of Comb2 is set to overlap with the PUSCH resource, the UE performs rate matching (or puncturing) on the PUSCH in the REs for which the ZP-SRS is valid, and performs PUSCH transmission.

In this case, it is possible to efficiently perform transmission of the UL channel while suppressing an increase in the coding rate of the UL channel to a minimum and suppressing a decrease in communication quality, and to improve the throughput of the UL channel.

EXAMPLE 5-2

In the case where the ZP-SRS and UL channel resources overlap, the UE may not use the resources set for the ZP-SRS (ZP-SRS resource range) for the transmission of the UL channel and the DMRS for the UL channel, and may rate-match (or puncture) the UL channel within the ZP-SRS resource range. In case that ZP-SRS resources having Comb structure are set to the UE, the ZP-SRS resource range includes not only REs represented by the set value of Comb offset but also REs represented by other values of Comb offset.

For example, as shown in fig. 19B, when the ZP-SRS resource overlaps with the PUSCH resource as in fig. 19A, the UE performs rate matching (or puncturing) on the PUSCH within the ZP-SRS resource range and performs PUSCH transmission.

The ZP-SRS resource range is sometimes used by other UEs for SRS transmission. Therefore, according to embodiment 5-2, even if a UE is used for SRS transmission by another UE in a Comb different from the Comb of the ZP-SRS resource set, it is possible to avoid contention or interference between the UL channel of the UE and the SRS of the other UE.

EXAMPLES 5 to 3

When the ZP-SRS and the UL channel overlap in resources, the UE may rate-match (or puncture) the UL channel in the ZP-SRS symbols (all REs within the ZP-SRS symbols) without using the ZP-SRS symbols for the transmission of DMRS for the UL channel and the UL channel.

For example, as shown in fig. 19C, when the ZP-SRS resource overlaps with the PUSCH resource as in fig. 19A, the PUSCH is rate-matched (or punctured) in the symbol (period) in which the ZP-SRS is set, and transmission is performed on the PUSCH.

In this case, another SRS having a different length (bandwidth) may be transmitted by another UE in a ZP-SRS symbol overlapping with the UL channel of the UE. By not mapping the UL channel to the symbols of the ZP-SRS, contention or interference of the UL channel of the UE with SRS of other UEs in the symbol can be avoided.

< embodiment 6>

The UE may also drop or puncture the NZP-SRS under the condition that the ZP-SRS resources overlap with the NZP-SRS resources.

In the case where the ZP-SRS resource overlaps with the NZP-SRS resource, the UE may drop or puncture the NZP-SRS based on one of embodiments 6-1 to 6-4 below.

EXAMPLE 6-1

When the ZP-SRS resource overlaps with the NZP-SRS resource, the UE may not transmit the NZP-SRS in the ZP-SRS-configured RE. In other words, the UE may also puncture or drop the REs of the NZP-SRS that overlap with the ZP-SRS-configured REs.

In the example of fig. 20A, although ZP-SRS resources overlap NZP-SRS resources, the ZP-SRS-configured REs do not overlap NZP-SRS REs. In this case, the UE transmits the NZP-SRS as a whole (without puncturing the NZP-SRS).

According to embodiment 6-1, efficient UE multiplexing is possible by not transmitting in at least a part of the resources of the NZP-SRS.

EXAMPLE 6-2

In case that the ZP-SRS overlaps with the NZP-SRS, the UE may not transmit the NZP-SRS in the RE overlapping with the resource configured for the ZP-SRS (including Comb not configured for the ZP-SRS and RE not configured with the NZP-SRS).

For example, as shown in fig. 20B, in the case where the ZP-SRS resource overlaps with the NZP-SRS resource, the UE does not use a resource overlapping with a resource (ZP-SRS resource range) set for the ZP-SRS for the NZP-SRS transmission (the NZP-SRS is punctured in an RE overlapping with the resource set for the ZP-SRS).

ZP-SRS resources (including Comb and RE not used for ZP-SRS configured) are sometimes used by other UEs as resources for SRS and UL channels. By using embodiment 6-2, even if ZP-SRS resources are used by another UE, it is possible to avoid the NZP-SRS of the UE from competing with or interfering with the SRS of the other UE and the UL channel.

EXAMPLE 6-3

When the ZP-SRS and the NZP-SRS overlap, the UE may not transmit the NZP-SRS in the ZP-SRS symbol.

For example, as shown in fig. 20C, when the ZP-SRS resource overlaps with the NZP-SRS resource, the UE does not perform NZP-SRS transmission in the symbol in which the ZP-SRS resource is set (discarding the NZP-SRS).

In this case, other SRS of different length (sequence length, bandwidth) may be transmitted by other UEs in the ZP-SRS symbol of a certain UE. By transmitting a symbol that is not mapped to the ZP-SRS through the UL of the UE, contention or interference of SRS different in length (sequence length, bandwidth) from other UEs can be avoided.

EXAMPLE 6-4

In the case of NZP-SRS hopping, the UE may not transmit the NZP-SRS in the slot when at least a part of the ZP-SRS resources and the NZP-SRS resources overlap.

For example, as shown in fig. 21, when the ZP-SRS resource overlaps with the NZP-SRS resource, the UE does not transmit all the NZP-SRS in the slot (discards the NZP-SRS).

In case of NZP-SRS frequency hopping, the NZP-SRS needs to be transmitted through a plurality of symbols. Therefore, a part of symbols of the NZP-SRS are not transmitted over a plurality of symbols, and the purpose of transmitting the NZP-SRS cannot be achieved. When different spatial relationships are applied to a plurality of symbols in the multi-symbol SRS, it may not be meaningful to perform partial transmission with respect to the NZP-SRS. In the case of embodiment 6-4, power consumption of the UE can be suppressed by not transmitting the NZP-SRS in the entire plurality of symbols.

< embodiment 7>

The UE may be configured with ZP-SRS resources including a portion where UL channel resources configured for the UE overlap SRS resources configured for other UEs. The UE may also be configured to transmit an SRS from another UE in a portion where the UL channel resource set for the UE overlaps with the SRS resource set for the other UE. When ZP-SRS resources are set, the UE may overlap at least a part of UL channel resources set for the UE and SRS resources set for other UEs.

When at least a part of the UL channel resource of the UE #1 and the SRS resource of the UE #2 overlap, the network (e.g., the base station) may set the ZP-SRS resource to the UE # 1.

For example, as shown in fig. 22, when the SRS resource of UE #2 is set in the PUSCH resource of UE #1 mapped in the slot, the ZP-SRS resource including the overlapping portion is set to UE # 1.

In this case, the network may notify the UE of the ZP-SRS configuration. Network-based notification may also be performed through higher layer signaling. By assuming this, it is possible to efficiently rate-match the UL channel resources of the UE among the SRS resources of other UEs.

(Wireless communication System)

Hereinafter, a configuration of a radio communication system according to an embodiment of the present disclosure will be described. In this radio communication system, communication is performed using one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.

Fig. 23 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), New wireless (5th Generation mobile communication system New Radio (5G NR)) of the fifth Generation mobile communication system, or the like.

In addition, the wireless communication system 1 may also support Dual Connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). The MR-DC may include Dual connection of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC))), Dual connection of NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC))), and the like.

In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Slave Node (SN). In NE-DC, the base station of NR (gNB) is MN and the base station of LTE (E-UTRA) (eNB) is SN.

The wireless communication system 1 may also support Dual connection between a plurality of base stations within the same RAT (for example, Dual connection of a base station (gNB) in which both MN and SN are NR (NR-NR Dual Connectivity (NN-DC)))).

The wireless communication system 1 may include: a base station 11 forming a macro cell C1 having a relatively wide coverage area, and base stations 12(12a to 12C) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The arrangement, number, and the like of each cell and user terminal 20 are not limited to the embodiments shown in the figures. Hereinafter, base stations 11 and 12 will be collectively referred to as base station 10 without distinction.

The user terminal 20 may also 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) and Dual Connectivity (DC) using a plurality of Component Carriers (CCs)).

Each CC may be included in at least one of the first Frequency band (Frequency Range 1(FR1))) and the second Frequency band (Frequency Range 2(FR 2))). Macro cell C1 may also be contained in FR1 and small cell C2 may also be contained in FR 2. For example, FR1 may be a frequency band of 6GHz or less (less than 6GHz (sub-6GHz)), and FR2 may be a frequency band higher than 24GHz (above-24 GHz)). The frequency bands, definitions, and the like of FR1 and FR2 are not limited to these, and FR1 may correspond to a higher frequency band than FR2, for example.

The user terminal 20 may perform communication in each CC by using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

The plurality of base stations 10 may also be connected by wire (e.g., optical fiber based Common Public Radio Interface (CPRI)), X2 Interface, or the like) or wirelessly (e.g., NR communication). For example, when NR communication is used as a Backhaul between base stations 11 and 12, base station 11 corresponding to an upper station may be referred to as an Integrated Access Backhaul (IAB) donor (donor) and base station 12 corresponding to a relay (relay) may be referred to as an IAB node.

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

The user terminal 20 may be a terminal supporting at least one of communication schemes such as LTE, LTE-a, and 5G.

The radio communication system 1 may use a radio access scheme based on Orthogonal Frequency Division Multiplexing (OFDM). For example, in at least one of the downlink (dl)) and the 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), or the like may be used.

The radio access method may also be referred to as a waveform (waveform). In the radio communication system 1, other radio access schemes (for example, other single-carrier transmission schemes and other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

In the radio communication system 1, as the Downlink Channel, a Downlink Shared Channel (Physical Downlink Shared Channel (PDSCH))), a Broadcast Channel (Physical Broadcast Channel (PBCH))), a Downlink Control Channel (Physical Downlink Control Channel (PDCCH))) and the like that are Shared by the user terminals 20 may be used.

In the radio communication system 1, as the Uplink Channel, an Uplink Shared Channel (Physical Uplink Shared Channel (PUSCH))), an Uplink Control Channel (Physical Uplink Control Channel (PUCCH))), a Random Access Channel (Physical Random Access Channel (PRACH)), and the like, which are Shared by the user terminals 20, may be used.

User data, higher layer control Information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, etc. may also be transmitted over the PUSCH. In addition, a Master Information Block (MIB)) may also be transmitted through the PBCH.

The lower layer control information may also be transmitted through the PDCCH. The lower layer Control Information may include, for example, Downlink Control Information (DCI)) including scheduling Information of at least one of the PDSCH and the PUSCH.

The DCI scheduling PDSCH may be referred to as DL assignment, DL DCI, or the like, and the DCI scheduling PUSCH may be referred to as UL grant, UL DCI, or the like. In addition, the PDSCH may be replaced with DL data and the PUSCH may be replaced with UL data.

For PDCCH detection, a COntrol REsource SET (countrol REsource SET (CORESET)) and a search space (search space) may be used. CORESET corresponds to searching for DCI resources. The search space corresponds to a search region and a search method of PDCCH candidates (PDCCH candidates). 1 CORESET may also be associated with 1 or more search spaces. The UE may also monitor the CORESET associated with a certain search space based on the search space settings.

One search space may also correspond to PDCCH candidates corresponding to 1 or more aggregation levels (aggregation levels). The 1 or more search spaces may also be referred to as a set of search spaces. In addition, "search space", "search space set", "search space setting", "search space set setting", "CORESET setting", and the like of the present disclosure may be replaced with each other.

Uplink Control Information (UCI)) including at least one of Channel State Information (CSI), ACKnowledgement Information (for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)), ACK/NACK, and Scheduling ReQuest (SR)) may be transmitted through the PUCCH. A random access preamble for establishing a connection with a cell may also be transmitted through the PRACH.

In addition, in the present disclosure, a downlink, an uplink, and the like may also be expressed without "link". Further, it can be said that "Physical (Physical)" is not attached to the head of each channel.

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 may be a Cell-specific Reference Signal (CRS), a Channel State Information Reference Signal (CSI-RS), a DeModulation Reference Signal (DMRS), a Positioning Reference Signal (PRS), a Phase Tracking Reference Signal (PTRS), or the like.

The Synchronization Signal may be at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), for example. The signal blocks containing SS (PSS, SSs) and PBCH (and DMRS for PBCH) may also be referred to as SS/PBCH blocks, SS blocks (SSB), and the like. In addition, SS, SSB, etc. may also be referred to as reference signals.

In addition, in the wireless communication system 1, as an Uplink Reference Signal (UL-RS), a measurement Reference Signal (Sounding Reference Signal (SRS)), a demodulation Reference Signal (DMRS), or the like may be transmitted. The DMRS may also be referred to as a user terminal specific Reference Signal (UE-specific Reference Signal).

(base station)

Fig. 24 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting/receiving unit 120, a transmitting/receiving antenna 130, and a transmission line interface (transmission line interface) 140. The control unit 110, the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission line interface 140 may be provided in one or more numbers.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and the base station 10 can be assumed to have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

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

The transceiver 120 may also include a baseband (baseband) unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission/reception section 120 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmission/reception circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission unit may be constituted by the transmission processing unit 1211 and the RF unit 122. The receiving unit may be configured by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

The transmitting/receiving antenna 130 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission/reception unit 120 may receive the uplink channel, the uplink reference signal, and the like.

Transmit/receive section 120 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, with respect to Data, Control information, and the like acquired from Control section 110, transmission/reception section 120 (transmission processing section 1211) may perform processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (e.g., RLC retransmission Control), processing of a Medium Access Control (MAC) layer (e.g., HARQ retransmission Control), and the like, and generate a bit string to be transmitted.

Transmission/reception section 120 (transmission processing section 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

The transmission/reception unit 120(RF unit 122) may perform modulation, filter processing, amplification, and the like for a baseband signal in a radio frequency band, and transmit a signal in the radio frequency band via the transmission/reception antenna 130.

On the other hand, the transmission/reception unit 120(RF unit 122) may perform amplification, filter processing, demodulation to a baseband signal, and the like on a signal of a radio frequency band received by the transmission/reception antenna 130.

Transmission/reception section 120 (reception processing section 1212) may acquire user data and the like by applying, to the acquired baseband signal, reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filter processing, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing.

The transmission/reception unit 120 (measurement unit 123) may also perform measurement related to the received signal. For example, measurement section 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, and the like based on the received signal. Measurement section 123 may perform measurement of Received Power (e.g., Reference Signal Received Power (RSRP)), Received Quality (e.g., Reference Signal Received Quality (RSRQ)), Signal to Interference plus Noise Ratio (SINR)), Signal to Noise Ratio (SNR)), Signal Strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 110.

The transmission path interface 140 may transmit and receive signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, and the like, or may acquire and transmit user data (user plane data) and control plane data and the like for the user terminal 20.

The transmitting unit and the 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 line interface 140.

(user terminal)

Fig. 25 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission/reception unit 220, and a transmission/reception antenna 230. Further, the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided with one or more antennas.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 210 may also control the generation, mapping, etc. of the signals. Control section 210 may control transmission/reception, measurement, and the like using transmission/reception section 220 and transmission/reception antenna 230. Control section 210 may generate data, control information, a sequence, and the like to be transmitted as a signal, and forward the generated data, control information, sequence, and the like to transmission/reception section 220.

The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmitting/receiving section 220 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission section may be constituted by the transmission processing section 2211 and the RF section 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmission/reception antenna 230 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 220 may receive the downlink channel, the synchronization signal, the downlink reference signal, and the like. The transmission/reception unit 220 may transmit the uplink channel, the uplink reference signal, and the like described above.

Transmit/receive section 220 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, transmission/reception section 220 (transmission processing section 2211) may perform processing in the PDCP layer, processing in the RLC layer (for example, RLC retransmission control), processing in the MAC layer (for example, HARQ retransmission control), and the like on data, control information, and the like acquired from control section 210, and generate a bit sequence to be transmitted.

Transmission/reception section 220 (transmission processing section 2211) may perform transmission processing such as channel coding (including error correction coding as well), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

Whether or not DFT processing is applied may be set based on transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is active (enabled), transmission/reception section 220 (transmission processing section 2211) may perform DFT processing as the transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, or otherwise, transmission/reception section 220 (transmission processing section 2211) may not perform DFT processing as the transmission processing.

The transmission/reception section 220(RF section 222) may perform modulation, filtering, amplification, and the like for a baseband signal in a radio frequency band, and transmit a signal in the radio frequency band via the transmission/reception antenna 230.

On the other hand, the transmission/reception section 220(RF section 222) may perform amplification, filter processing, demodulation to a baseband signal, and the like on a signal in a radio frequency band received by the transmission/reception antenna 230.

Transmission/reception section 220 (reception processing section 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (including error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data.

The transceiver unit 220 (measurement unit 223) may also perform measurements related to the received signal. For example, the measurement unit 223 may also perform RRM measurement, CSI measurement, and the like based on the received signal. Measurement unit 223 may also measure for received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 210.

The transmitting unit and the 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.

Transmission/reception section 220 may transmit at least one of transmission of an Uplink (UL) channel and transmission of an SRS. Control section 210 may reduce the resources to which at least one of the uplink channel and the SRS is mapped (may drop, rate match, or puncture at least one of the uplink channel and the SRS) when a first resource (e.g., UL channel resource) given to the uplink channel overlaps with a second resource (e.g., SRS resource) given to the SRS.

Control section 210 may map the uplink channel in all of the first resources (may drop or puncture the SRS and transmit all of the uplink channel) instead of mapping the SRS in at least a part of the second resources (embodiment 1).

Control section 210 may map the SRS in all of the second resources without mapping the uplink channel in at least a part of the first resources (or may discard, puncture, or rate-match the uplink channel and transmit all of the SRS) (embodiment 2).

When the first resource overlaps with the second resource and a third resource (for example, UL channel resource) used for retransmission of the uplink channel is given, control section 210 may map the retransmission (embodiment 3) in one of a portion of the third resource that does not overlap with a resource (for example, SRS resource) given to another SRS (embodiment 3-1), a fourth resource having the same configuration as the first transmission of the uplink channel in the third resource (embodiment 3-2), and a portion of the fourth resource that does not overlap with a resource given to another SRS (embodiment 3-3).

Control section 210 may map the uplink channel in each of a plurality of slots (for example, a plurality of slots for a multi-slot UL channel) in one of a configuration of resources that do not overlap with resources given to an SRS, the same configuration as resources that do not overlap with resources given to an SRS in the first slot of the plurality of slots, and a configuration of resources that do not overlap with resources given to an SRS in any one of the plurality of slots (embodiment 4).

Transmission/reception section 220 may receive first resource setting information (e.g., SRS setting information, SRS resource set setting information, SRS resource setting information, ZP-SRS resource set setting information, ZP-SRS resource setting information, etc.) indicating a Sounding Reference Signal (SRS) with zero power (e.g., ZP-SRS) (embodiment 5). When a second resource given for uplink transmission overlaps with the first resource, control section 210 may not map the uplink transmission in at least a part of the second resource (embodiment 5).

The setting information may indicate that the usage (usage) of the first resource (e.g., the SRS resource set including the first resource) is zero power (embodiment 5).

The first resource may have a Comb structure (embodiment 5).

The uplink transmission may be a physical uplink shared channel or a physical uplink control channel (embodiment 5).

The uplink transmission may be an SRS (for example, NZP-SRS) having a non-zero power (embodiment 6).

(hardware construction)

The block diagram used in the description of the above embodiment shows blocks in functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. The method of implementing each functional block is not particularly limited. That is, each functional block may be implemented by one apparatus that is physically or logically combined, or may be implemented by a plurality of apparatuses that are directly or indirectly (for example, by wire or wireless) connected to two or more apparatuses that are physically or logically separated. The functional blocks may also be implemented by combining the above-described apparatus or apparatuses with software.

Here, the functions include judgment, determination, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notification), communication (communicating), forwarding (forwarding), configuration (setting), reconfiguration (resetting), allocation (allocating, mapping), assignment (assigning), and the like, but are not limited to these. For example, a function block (a configuration unit) that realizes a transmission function may also be referred to as a transmission unit (transmitting unit), a transmitter (transmitter), or the like. Any of these methods is not particularly limited, as described above.

For example, the base station, the user terminal, and the like in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 26 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. The base station 10 and the user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In addition, in the present disclosure, terms such as device, circuit, apparatus, section (section), unit, and the like can be substituted for each other. The hardware configurations of the base station 10 and the user terminal 20 may include one or more of the respective devices shown in the drawings, or may not include some of the devices.

For example, only one processor 1001 is illustrated, but there may be multiple processors. The processing may be executed by one processor, or may be executed by two or more processors simultaneously, sequentially, or by another method. Further, the processor 1001 may be implemented by one or more chips.

Each function of the base station 10 and the user terminal 20 is realized by, for example, reading specific software (program) into hardware such as the processor 1001 and the memory 1002, performing an operation by the processor 1001 to control communication via the communication device 1004, or controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a Central Processing Unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, at least a part of the control unit 110(210), the transmitting and receiving unit 120(220), and the like may be implemented by the processor 1001.

Further, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110(210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be similarly realized for other functional blocks.

The Memory 1002 may be a computer-readable recording medium, and may be formed of at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM)), a Random Access Memory (RAM), or another suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory (primary storage), or the like. The memory 1002 can store a program (program code), a software module, and the like that are executable to implement the wireless communication method according to one embodiment of the present disclosure.

The storage 1003 may be a computer-readable recording medium, and may be, for example, at least one of a flexible disk (flexible Disc), a Floppy (registered trademark) disk, an optical disk (e.g., a Compact Disc read only memory (CD-ROM)) or the like), a digital versatile Disc (dvd), a Blu-ray (registered trademark) disk, a removable disk (removable Disc), a hard disk drive, a smart card (smart card), a flash memory device (e.g., a card (card), a stick (stick), a key drive), a magnetic stripe (stripe), a database, a server, or another suitable storage medium.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. Communication apparatus 1004 may be configured to include a high-Frequency switch, a duplexer, a filter, a Frequency synthesizer, and the like, in order to realize at least one of Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD), for example. For example, the transmitting/receiving unit 120(220), the transmitting/receiving antenna 130(230), and the like described above may be implemented by the communication device 1004. The transmitting/receiving unit 120(220) may be physically or logically separately installed from the transmitting unit 120a (220a) and the receiving unit 120b (220 b).

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, or the like) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Further, the processor 1001, the memory 1002, and other devices are connected by a bus 1007 for communicating information. The bus 1007 may be formed by a single bus, or may be formed by different buses between the respective devices.

The base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), or the like, and a part or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may also be installed with at least one of these hardware.

(modification example)

In addition, terms described in the present disclosure and terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols, and signals (signals or signaling) may be substituted for one another. Further, the signal may also be a message. The Reference Signal (Reference Signal) may also be referred to as RS for short, and may also be referred to as Pilot (Pilot), Pilot Signal, etc. depending on the applied standard. Further, Component Carriers (CCs) may also be referred to as cells, frequency carriers, Carrier frequencies, and the like.

A radio frame may also be made up of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more slots in the time domain. The subframe may also be a fixed time length (e.g., 1ms) independent of a parameter set (numerology).

Here, the parameter set may also refer to a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the parameter set may indicate at least one of SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the Time domain, and the like.

The time slot may be formed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, or the like) in the time domain. Further, the time slot may also be a time unit based on a parameter set.

A timeslot may also contain multiple mini-slots. Each mini-slot may also be made up of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be made up of a fewer number of symbols than a slot. PDSCH (or PUSCH) transmitted in a time unit larger than a mini slot may also be referred to as PDSCH (PUSCH) mapping type a. PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

The radio frame, subframe, slot, mini-slot, and symbol all represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot, and symbol may also use other names corresponding to each. In addition, time units such as frames, subframes, slots, mini-slots, symbols, etc. in the present disclosure may be replaced with one another.

For example, one subframe may also be referred to as TTI, a plurality of consecutive subframes may also be referred to as TTI, and one slot or one mini-slot may also be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in the conventional LTE, may be a period shorter than 1ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms. The unit indicating TTI may be referred to as a slot, a mini slot, or the like, instead of a subframe.

Here, the TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (such as a frequency bandwidth and transmission power usable by each user terminal) to each user terminal in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), code block, code word, or the like, or may be a processing unit of scheduling, link adaptation, or the like. In addition, when a TTI is given, a time interval (e.g., the number of symbols) to which a transport block, a code block, a codeword, or the like is actually mapped may be shorter than the TTI.

When one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. The number of slots (the number of mini-slots) constituting the minimum time unit of the schedule may be controlled.

The TTI having a time length of 1ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1ms, and a short TTI (e.g., a shortened TTI, etc.) may be replaced with a TTI having a TTI length smaller than that of the long TTI and equal to or longer than 1 ms.

A Resource Block (RB) is a Resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, and may be 12, for example. The number of subcarriers included in the RB may also be decided based on the parameter set.

In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, and the like may be formed of one or more resource blocks.

In addition, one or more RBs may also be referred to as a Physical Resource Block (PRB), a subcarrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, and the like.

Furthermore, a Resource block may also be composed of one or more Resource Elements (REs). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

The Bandwidth Part (BWP) (which may be referred to as a partial Bandwidth) may also indicate a subset of consecutive common RBs (common resource blocks) for a certain parameter set in a certain carrier. Here, the common RB may also be determined by an index of an RB with reference to a common reference point of the carrier. PRBs may also be defined in a certain BWP and are numbered additionally within the BWP.

The BWP may include UL BWP (UL BWP) and DL BWP (DL BWP). One or more BWPs may also be set within 1 carrier for the UE.

At least one of the set BWPs may be active, and the UE may not expect to transmit and receive a specific signal/channel other than the active BWP. In addition, "cell", "carrier", and the like in the present disclosure may also be replaced with "BWP".

The above-described configurations of radio frames, subframes, slots, mini slots, symbols, and the like are merely examples. For example, the structure of the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, and the like can be variously changed.

The information, parameters, and the like described in the present disclosure may be expressed as absolute values, relative values to specific values, or other corresponding information. For example, the radio resource may also be indicated by a specific index.

In the present disclosure, the names used for the parameters and the like are not limitative names in all aspects. Further, the mathematical expressions and the like using these parameters may also be different from those explicitly disclosed in the present disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and thus the various names assigned to these various channels and information elements are not limitative names in all aspects.

Information, signals, and the like 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, and the like that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

Information, signals, and the like can be output to at least one of a higher layer (upper layer) to a lower layer (lower layer) and a lower layer to a higher layer. Information, signals, and the like may be input and output via a plurality of network nodes.

The input/output information, signals, and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. The input/output information, signals, and the like may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be transmitted to other devices.

The information notification is not limited to the embodiment and embodiment described in the present disclosure, and may be performed by other methods. For example, the Information notification in the present disclosure may be implemented by physical layer signaling (e.g., Downlink Control Information (DCI)), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast Information (Master Information Block (MIB)), System Information Block (SIB)), or the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

The physical Layer signaling may also be referred to as Layer 1/Layer 2(L1/L2)) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup (RRC Connection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, or the like. The MAC signaling may be notified using a MAC Control Element (CE), for example.

Note that the notification of the specific information (for example, the notification of "X") is not limited to an explicit notification, and may be performed implicitly (for example, by not performing the notification of the specific information or by performing the notification of other information).

The decision may be made by a value (0 or 1) represented by one bit, by a true-false value (boolean) represented by true (true) or false (false), or by a comparison of values (e.g., with a specific value).

Software, whether referred to as software (software), firmware (firmware), middleware-ware (middle-ware), microcode (micro-code), hardware description language, or by other names, should be broadly construed to mean instructions, instruction sets, code (code), code segments (code segments), program code (program code), programs (program), subroutines (sub-program), software modules (software module), applications (application), software applications (software application), software packages (software packages), routines (routine), subroutines (sub-routine), objects (object), executables, threads of execution, processes, functions, or the like.

Software, instructions, information, and the like may also be transmitted or received via a transmission medium. For example, where the software is transmitted from a website, server, or other remote source (remote source) using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of transmission medium.

The terms "system" and "network" as used in this disclosure can be used interchangeably. "network" may also mean a device (e.g., a base station) included in a network.

In the present disclosure, terms such as "precoding", "precoder", "weight", "Quasi-Co-location (qcl)", "Transmission Configuration Indication state (TCI state)", "spatial relationship (spatial relationship)", "spatial filter (spatial domain filter)", "Transmission power", "phase rotation", "antenna port group", "layer", "rank", "resource set", "resource group", "beam width", "beam angle", "antenna element", "panel", and the like can be used interchangeably.

In the present disclosure, terms such as "Base Station (BS)", "wireless Base Station", "fixed Station (fixed Station)", "NodeB", "enb (enodeb)", "gnb (gtnodeb)", "access point (access point)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where a base station is referred to by terms such as macrocell, smallcell, femtocell, picocell, and the like.

The base station can accommodate one or more (e.g., three) cells. When a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a portion or the entirety of the coverage area of at least one of a base station and a base station subsystem that is in communication service within the coverage area.

In the present disclosure, terms such as "Mobile Station (MS)", "User terminal (User terminal)", "User Equipment (UE)))," terminal "and the like can be used interchangeably.

In some instances, a mobile station is also referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset (hand set), user agent, mobile client, or some other suitable terminology.

At least one of the base station and the mobile station may also be referred to as a transmitting apparatus, a receiving apparatus, a wireless communication apparatus, and the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, a mobile body main body, or the like. The mobile body may be a vehicle (e.g., a vehicle, an airplane, etc.), may be a mobile body that moves in an unmanned manner (e.g., a drone (a drone), an autonomous vehicle, etc.), or may be a robot (manned or unmanned). At least one of the base station and the mobile station further includes a device that does not necessarily move when performing a communication operation. 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.

In addition, the base station in the present disclosure may also be replaced with a user terminal. For example, the various aspects/embodiments of the present disclosure may also be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (e.g., may also be referred to as Device-to-Device (D2D)), Vehicle networking (V2X), etc.). In this case, the user terminal 20 may have the functions of the base station 10 described above. The expressions such as "uplink" and "downlink" may be replaced with expressions (for example, "side") corresponding to inter-terminal communication. For example, the uplink channel, the downlink channel, and the like may be replaced with the side channel.

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

In the present disclosure, the operation performed by the base station is sometimes performed by an upper node (upper node) of the base station, depending on the case. Obviously, in a network including one or more network nodes (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 (for example, considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited thereto), or a combination thereof.

The embodiments and modes described in the present disclosure may be used alone, may be used in combination, or may be switched to use with execution. Note that, in the embodiments and the embodiments described in the present disclosure, the order of the processes, sequences, flowcharts, and the like may be changed as long as they are not contradictory. For example, elements of various steps are presented in an exemplary order for a method described in the present disclosure, but the present invention is not limited to the specific order presented.

The aspects/embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, fourth generation Mobile communication System (4 generation communication System (4G)), fifth generation Mobile communication System (5G)), Future Radio Access (FRA), New Radio Access Technology (RAT)), New Radio (New Radio trademark (NR)), New Radio Access (NX)), New Radio Access (Future Radio Access), FX), Global Broadband communication System (Global System for Mobile communication (GSM)), and Mobile Broadband communication System (CDMA) (2000 Mobile communication System)), (CDMA, etc.) IEEE 802.11(Wi-Fi (registered trademark)), IEEE 802.16(WiMAX (registered trademark)), IEEE 802.20, Ultra-wideband (uwb), Bluetooth (registered trademark), a system using another appropriate wireless communication method, a next generation system expanded based on these, and the like. Furthermore, multiple systems may also be applied in combination (e.g., LTE or LTE-a, combination with 5G, etc.).

The term "based on" used in the present disclosure does not mean "based only" unless otherwise specified. In other words, the expression "based on" means both "based only on" and "based at least on".

Any reference to the use of the terms "first," "second," etc. in this disclosure does not fully define the amount or order of such elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to first and second elements does not imply that only two elements may be used or that the first element must somehow override the second element.

The term "determining" as used in this disclosure encompasses a wide variety of actions in some cases. For example, "determination (decision)" may be regarded as a case where "determination (decision)" is performed on determination (rounding), calculation (calculating), processing (processing), derivation (deriving), investigation (investigating), search (looking up), search, inquiry (query)) (for example, search in a table, a database, or another data structure), confirmation (authenticating), and the like.

The "determination (decision)" may be regarded as a case of "determining (deciding)" on reception (e.g., reception information), transmission (e.g., transmission information), input (input), output (output), access (e.g., access to data in a memory), and the like.

The "determination (decision)" may be also regarded as a case of performing "determination (decision)" on solution (resolving), selection (selecting), selection (breathing), establishment (evaluating), comparison (comparing), and the like. That is, "judgment (decision)" may also be regarded as a case where "judgment (decision)" is performed on some actions.

The "determination (decision)" may be replaced with "assumption", "expectation", "consideration", and the like.

The terms "connected" and "coupled" or any variation thereof used in the present disclosure mean all connections or couplings between two or more elements directly or indirectly, and can include a case where one or more intermediate elements exist between two elements "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination of these. For example, "connect" may also be replaced with "access".

In the present disclosure, where two elements are connected, it can be considered to be "connected" or "joined" to each other using more than one wire, cable, printed electrical connection, etc., and using electromagnetic energy having a wavelength in the radio frequency domain, the microwave region, the optical (both visible and invisible) region, etc., as several non-limiting and non-inclusive examples.

In the present disclosure, the term "a is different from B" may mean "a and B are different from each other". In addition, the term may also mean "a and B are different from C, respectively". The terms "separate", "associated", and the like may likewise be construed as "different".

In the present disclosure, when the terms "including", and "variations thereof are used, these terms are intended to have inclusive meanings as in the term" comprising ". Further, the term "or" used in the present disclosure does not mean exclusive or.

In the present disclosure, for example, in the case where articles are added by translation as in a, an, and the in english, the present disclosure may also include the case where nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it will be apparent to 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 defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not have any limiting meaning to the invention to which the present disclosure relates.

Claims

1. A terminal having:

a receiving unit that receives configuration information representing a first resource of a zero-power sounding reference signal (SRS); and

The control unit does not map the uplink transmission in at least a part of the second resource when the second resource given for the uplink transmission overlaps the first resource.

2. The terminal according to claim 1, wherein,

The setting information indicates that the use of the first resource is zero power.

3. The terminal according to claim 1 or claim 2, wherein,

The first resource has a Comb structure.

4. The terminal according to any one of claims 1 to 3, wherein,

The uplink transmission is a physical uplink shared channel or a physical uplink control channel.

5. The terminal according to any one of claims 1 to 4, wherein,

The uplink transmission is an SRS with non-zero power.

6. A wireless communication method for a terminal, comprising:

the step of receiving configuration information representing a first resource of a zero-power sounding reference signal (SRS); and

The step of not mapping the uplink transmission in at least a part of the second resource if the second resource given for the uplink transmission overlaps the first resource.