WO2021024483A1

WO2021024483A1 - Terminal and wireless communication method

Info

Publication number: WO2021024483A1
Application number: PCT/JP2019/031490
Authority: WO
Inventors: 祐輝松村; 佑一柿島; 聡永田
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2021-02-11
Also published as: CN114208328A

Abstract

The terminal according to one aspect of the present disclosure is provided with: a reception unit that receives setting information indicating first resources of a zero-power sounding reference signal (SRS); and a control unit that, when second resources applied to an uplink transmission and the first resources overlap, does not map the uplink transmission in at least a part of the second resources. According to said one aspect of the present disclosure, processes are appropriately performed when the resources applied to the uplink transmission and the resources applied to the SRS overlap.

Description

Terminal and wireless communication method

The present disclosure relates to terminals and wireless communication methods in next-generation mobile communication systems.

In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

A successor system to LTE (for example, 5th generation mobile communication system (5G), 5G + (plus), New Radio (NR), 3GPP Rel.15 or later, etc.) is also being considered.

In an existing LTE system (for example, LTE Rel.8-14), a user terminal (User Equipment (UE)) transmits an uplink signal. The uplink signal is, for example, 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)), and a sounding reference signal (Sounding). Reference Signal (SRS)), PUSCH or PUCCH demodulation reference signal (Demodulation Reference Signal (DM-RS)) may be included at least one.

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

However, the operation of the terminal when the time and frequency resources given to the uplink transmission and the time and frequency resources given to the SRS overlap (overlap) is not clear. In such a case, if the terminal cannot handle it properly, the system performance may deteriorate.

Therefore, one of the purposes of the present disclosure is to provide a terminal and a wireless communication method that appropriately handle when the resource given to the uplink transmission and the resource given to the SRS overlap.

A terminal according to one aspect of the present disclosure includes a receiving unit that receives setting information indicating a first resource of a zero-power sounding reference signal (SRS), a second resource given to uplink transmission, and the first resource. In the case of duplication, at least a part of the second resource includes a control unit that does not map the uplink transmission.

According to one aspect of the present disclosure, when the resource given to the uplink transmission and the resource given to the SRS overlap, it is appropriately processed.

1A and 1B are diagrams showing an example of a Comb configuration of SRS. FIG. 2 is a diagram showing an example in which a resource for an uplink channel and a resource for an SRS overlap. 3A and 3B are diagrams showing an example of a resource control method for the uplink channel and the resource for the SRS. FIG. 4 is a diagram showing an example of transmission priority according to the type of uplink transmission. 5A-5C are diagrams showing an example of a resource control method for uplink channels and resources for SRS. FIG. 6 is a diagram showing an example of a Comb configuration of SRS. 7A-7C are diagrams showing an example of a resource control method for the uplink channel and the resource for the SRS. FIG. 8 is a diagram showing an example of a Comb configuration of SRS. 9A-9C are diagrams showing an example of a control method in the initial transmission and retransmission of the uplink channel. 10A-10C are diagrams showing an example of a control method in the initial transmission and retransmission of the uplink channel. 11A and 11B are diagrams showing an example of a control method in the initial transmission and retransmission of the uplink channel. FIG. 12 is a diagram showing an example of a resource control method for an uplink channel over a plurality of slots and a resource for SRS. FIG. 13 is a diagram showing an example of a resource control method for an uplink channel over a plurality of slots and a resource for SRS. FIG. 14 is a diagram showing an example of a resource control method for an uplink channel over a plurality of slots and a resource for SRS. FIG. 15 is a diagram showing an example of a resource control method for an uplink channel over a plurality of slots and a resource for SRS. FIG. 16 is a diagram showing an example of a resource control method for an uplink channel over a plurality of slots and a resource for SRS. 17A and 17B are diagrams showing an example in which the resources of the uplink channel of the UE and the SRS of another UE overlap. 18A-C is a diagram showing an example of a Comb configuration of ZP-SRS. 19A-19C are diagrams showing an example of a control method when the resource for the uplink channel and the resource for the ZP-SRS overlap. 20A-20C are diagrams showing an example of a control method when the resource for ZP-SRS and the resource for NZP-SRS overlap. FIG. 21 is a diagram showing an example of a control method when the resource for ZP-SRS and the resource for NZP-SRS overlap. FIG. 22 is a diagram showing an example of a control method when the upstream channel resource of the UE and the SRS of another UE overlap. FIG. 23 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 24 is a diagram showing an example of the configuration of the base station according to the embodiment. FIG. 25 is a diagram showing an example of the configuration of the user terminal according to the embodiment. FIG. 26 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.

(SRS)
In NR, the reference signal for measurement (Sounding Reference Signal (SRS)) has a wide range of uses. NR's SRS is used not only for UL channel state information (CSI) measurement, which was also used in existing LTE (LTE Rel.8-14), but also for DL CSI measurement, beam management, etc. Will be done.

The UE may be configured with one or more SRS resources. The SRS resource may be specified by an SRS resource instruction (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, or the like.

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 include a starting position l ₀ in the time domain.

Each SRS resource IE may include a starting position k ₀ in the frequency domain.

The UE may be set with one or more SRS resource sets (SRS resource sets). One SRS resource set may be associated with a predetermined number of SRS resources. The UE may commonly use higher layer parameters for SRS resources included in one SRS resource set. In the present disclosure, the resource set may be read as a resource group, simply a group, or the like.

At least one of the SRS resource set and the information about the SRS resource may be set in the UE using higher layer signaling, physical layer signaling, or a combination thereof.

The upper layer signaling may be, for example, any one of RRC (Radio Resource Control) signaling, media access control (MAC) signaling, broadcast information, or a combination thereof.

For MAC signaling, for example, a MAC control element (MAC Control Element (CE)), a MAC Protocol Data Unit (PDU), or the like may be used. The broadcast information includes, for example, a master information block (Master Information Block: MIB), a system information block (System Information Block: SIB), a minimum system information (Remaining Minimum System Information: RMSI), and other system information (Other System Information). : OSI) and the like.

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

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

The SRS resource set setting information (for example, the RRC parameter "SRS-ResourceSet") includes an SRS resource set ID (Identifier) (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, and SRS. Information on resource type and SRS usage may be included.

Here, the SRS resource types are periodic SRS (Periodic SRS: P-SRS), semi-persistent SRS (Semi-Persistent SRS: SP-SRS), and aperiodic CSI (Aperiodic SRS: A-SRS, AP-SPS). ) May be indicated. The UE may transmit P-SRS and SP-SRS periodically (or periodically after activation), and may transmit A-SRS based on DCI's SRS request.

The uses of SRS (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") are, for example, beam management (beamManagement), codebook (codebook: CB), noncodebook (noncodebook). : NCB), antenna switching, etc. may be used. SRS for codebook or non-codebook use may be used to determine a precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.

An SRS for beam management may be assumed that only one SRS resource for each SRS resource set can be transmitted in an instant at a predetermined time. When a plurality of SRS resources belong to different SRS resource sets, these SRS resources may be transmitted at the same time.

For example, in the case of codebook-based transmission, the UE determines a precoder for PUSCH transmission based on SRI, a transmission rank index (Transmitted Rank Indicator: TRI), and a transmission precoding matrix index (Transmitted Precoding Matrix Indicator: TPMI). You may. In the case of non-codebook-based transmission, the UE may determine a precoder for PUSCH transmission based on SRI.

The SRS resource setting information (for example, the RRC parameter "SRS-Resource") includes the SRS resource ID (SRS-ResourceId), the number of SRS ports, the SRS port number, the transmission comb, and the SRS resource mapping (for example, at least one of time and frequency). It may include one resource position, resource offset, resource period, number of iterations, number of SRS symbols, SRS bandwidth, etc.), hopping-related information, SRS resource type, sequence ID, space-related information, and the like.

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

The UE may switch the BWP (Bandwidth Part) that transmits SRS for each slot, or may switch the antenna. In addition, the UE may apply at least one of in-slot hopping and inter-slot hopping to SRS transmission.

The SRS series may be a low peak power to average power ratio (PAPR) series. The transmission Comb number K _TC may be included in the upper layer parameter (eg, transmissionComb).

The low PAPR series may be a Constant Amplitude Zero Auto Correlation (CAZAC) series or a series conforming to the CAZAC series (for example, a computer-generated (CGS)) series. The CGS may be specified in the specification (eg, table).

The transmission combs of SRS include Comb2 (1RE SRS is placed for each 2 resource elements (RE, subcarrier)) or Comb4 (1RE SRS is placed for every 4RE), and cyclic shift (CS). IFDMA (Interleaved Frequency Division Multiple Access) using, may be applied.

In the Comb configuration where the Comb value (value) = n, the Comb offset can take any value of an integer from 0 to n-1. The configuration of Comb2 (Comb value = 2) can take any value of Comb offset = {0,1}. FIG. 1A shows the case where the Comb offset = {0,1}, respectively. Further, the configuration of Comb4 (Comb value = 4) can take any value of Comb offset = {0,1,2,3}. FIG. 1B shows the case where the Comb offset = {0,1,2,3}.

In the present disclosure, the Comb offset, the Comb index, and the transmitted Comb offset may be read as each other.

CS in the case of COMB2, cyclic shift for the antenna port _{p i (cyclic shift (CS)} ) Number (CS index) n _SRS ^{cs, i} is the {0,1,2,3,4,5,6,7} It can take either value. In the case of Comb4, the CS number n _SRS ^{cs, i} for the antenna port p _i can take any value of {0,1,2,3,4,5,6,7,8,9,10,11}. .. The value alpha _i of the CS for the antenna port p _i is, CS number n _SRS ^cs, the maximum number n _SRS ^cs ⁱ and CS ^{numbers, max} = 12 and 2 [pi] n _SRS ^{cs ^with, i} / n _SRS ^{^cs,} given as ^max .. When Comb2 and CS are used, a maximum of 2 × 8 = 16 UEs can be multiplexed. When Comb4 and CS are used, a maximum of 4 × 12 = 48 UEs can be multiplexed. Multiple CSs may be configured on different UEs or may be associated with different SRS ports.

(Duplicate between UL transmission resources)
Rel. In 15, the RE corresponding to the PUSCH in the PRB corresponding to the PUSCH is used for the DMRS associated with the PUSCH, the PTRS, and the DMRS for another co-scheduled UE (other co-scheduled UE). I can't. The DMRS for the other co-scheduled UE may be a DMRS located in a comb different from the DMRS comb associated with the PUSCH.

Rel. In 15, for SRS and PUCCH on the same carrier, either periodic (periodic (P))-SRS or semi-persistent (SP) -SRS and channel state information (CSI: Channel State Information) ) Only or PUCCH carrying only the reference signal reception power (L1-RSRP: Layer 1-Reference Signal Received Power) in layer 1 is set to the same symbol, the UE does not transmit the SRS. Also, when P-SRS or SP-SRS transmission is set in the same symbol as PUCCH that carries HARQ-ACK (Hybrid Automatic Repeat reQuest ACK knowledgement) or scheduling request (Scheduling Request (SR)), or aperiodically ( aperiodic (A) -When the transmission of SRS is triggered, the UE does not transmit SRS. If the SRS is not transmitted due to the overlap with the PUCCH, only the SRS symbol that overlaps with the PUCCH is dropped. If the A-SRS is triggered for overlapping transmissions with the same symbols as the PUCCH carrying only SP or P-CSI reports or SP or PL1-RSRP reports, the PUCCH will not be transmitted.

On the other hand, if the A-SRS and the PUCCH for semi-persistent CSI reporting or periodic CSI reporting overlap, the UE does not transmit the PUCCH.

3GPP Rel. In No. 15, simultaneous transmission of SRS and UL channel (PUSCH or PUCCH) in intra-band carrier aggregation and inter-band carrier aggregation is not permitted. The UE does not expect the SRS from one carrier and the PUSCH or UL DM-RS or UL PT-RS or PUCCH format from different carriers of the same symbol to be set.

However, the behavior of the UE when the set SRS resource and the scheduled or set PUSCH overlap is not clear. Further, the operation of the UE when the set SRS resource and the scheduled or set PUCCH overlap has not been sufficiently examined.

The case where the set SRS resource and the scheduled or set UL channel resource overlap will be described. In the example of FIG. 2, the set SRS resource of Comb2 is duplicated in the final symbol of the scheduled PUSCH. The processing in such a case is described in Rel. UE operation is not clear because it is not specified in 15.

On the other hand, it is being studied that SRS uses frequency hopping or Comb, and PUSCH spans multiple slots. When the UL transmission uses a complicated resource in this way, scheduling the PUSCH so that the base station does not overlap the SRS and the PUSCH reduces the flexibility of the schedule and increases the load on the base station.

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

Therefore, the present inventors have conceived a method of appropriately processing the UL channel and the SRS when the resource for the UL channel and the resource for the SRS overlap.

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

(Wireless communication method)
In the present disclosure, UL transmission, SRS, PUSCH, PUCCH, and UCI may be read as each other.

In the present disclosure, UL channel, PUSCH, PUCCH, and UCI may be read as each other.

In the present disclosure, slots, subslots, minislots, subframes, periods, and time fields may be read interchangeably.

In the present disclosure, the UL transmission is not performed, the UL transmission is dropped, the UL transmission is canceled, the entire UL transmission is not transmitted, and the UL transmission is set or scheduled. Not using all of the resources may be read interchangeably.

In the present disclosure, a part of a UL transmission is transmitted, a UL transmission is punctured, a UL transmission is rate-matched, and the UL transmission is mapped to a part of a resource set or scheduled for the UL transmission. That, not mapping the UL transmission to some of the resources configured or scheduled for the UL transmission, may be read interchangeably. In the present disclosure, puncturing or rate-matching UL transmissions on a particular resource, puncturing or rate-matching UL transmissions around a particular resource, not mapping UL transmissions to a particular resource, for UL transmissions. Not mapping UL transmission to a specific resource among the configured resources may be read as mutually exclusive.

In the present disclosure, UL channel resources, resources given to UL channels, resources configured or scheduled or triggered for UL channels, time and frequency resource ranges for UL channels, resource elements for UL channels ( RE), may be read interchangeably. In the present disclosure, SRS resources, resources given to SRS, resources set or scheduled or triggered for SRS, range of time and frequency resources for SRS, RE for SRS, may be read interchangeably. Good. In the present disclosure, UL transmission resources, resources given to UL transmission, resources set or scheduled or triggered for UL transmission, a range of time and frequency resources for UL transmission, RE for UL transmission, are: They may be read as each other.

In the present disclosure, resources set for SRS (eg, NZP-SRS or ZP-SRS), SRS resource range, entire band of SRS resource, all REs within the time and frequency range of SRS resources, all Combs. The offset-based REs may be read interchangeably.

In the present disclosure, placement, position, allocation, mapping, pattern, position in slot and in PRB, symbol position and subcarrier position may be read interchangeably.

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

Each embodiment may be applied to the duplication of PUSCH and SRS, or may be applied to the duplication of PUCCH and SRS.

<Embodiment 1>
If the resources of the SRS and UL channels overlap, the UE may not transmit part or all of one of the SRS or UL channels (the resources of one of the SRS or UL channels may be reduced).

<< Embodiment 1-1 >>
As shown in FIG. 3, when the resources of the SRS and the UL channel (for example, PUSCH) overlap, the UE does not transmit a part or all of the SRS (reduces the resource of the SRS), but transmits the UL channel. May be good. For example, the UE may not transmit the portion of the SRS that overlaps the resources of the UL channel (eg, PUSCH) by puncturing the SRS (FIG. 3A), or the UL channel (eg, PUSCH). SRS that overlaps with the resource of) may be dropped (Fig. 3B). In this case, the dynamically scheduled transmission of the UL channel can be preferentially secured, and the decrease in throughput can be suppressed.

When puncturing the SRS, the UE may (1) generate the transmission signal sequence before dropping and then puncture the overlapping portion between the SRS and the UL channel, or (2) the transmission signal sequence after dropping. A long SRS transmission signal sequence may be generated. Further, the UE may switch between (1) and (2) according to a notification from the network (for example, a base station).

When the resources of the SRS and the UL channel are duplicated, the UE may transmit the 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 SRS resource, or may drop the UL channel by rate-matching or puncturing the UL channel. Here, the UE may rate match or puncture the UL channel according to Embodiment 2. In this case, at least one of throughput improvement and quality improvement by SRS measurement becomes possible.

Aperiodic (A) -When the resources of the SRS and the UL channel overlap, the UE may transmit the A-SRS without transmitting a part or all of the UL channel. For example, the UE may, for example, rate match or puncture the UL channel so that it does not have to transmit the portion of the UL channel that overlaps the resources of the A-SRS, or it may drop the UL channel. Good. Here, the UE may rate match or puncture the UL channel according to Embodiment 2. In this case, the dynamically scheduled transmission of A-SRS can be preferentially secured, and at least one of throughput improvement and quality improvement by SRS measurement becomes possible.

<< Embodiment 1-2 >>
When the resources of the SRS and the UL channel overlap, the UE determines which UL transmission of the SRS or UL channel is preferentially transmitted based on at least one of the following priority UL transmission determination methods 1 to 5. You may decide.

[Priority UL transmission determination method 1]
The UE may determine preferred UL transmission based on the order of reception or detection of downlink control information (DCI) scheduling or triggering SRS and DCI scheduling or triggering UL channel.

The UE determines whether to prioritize the DCI that scheduled or triggered the SRS or the SRS or UL channel that was previously scheduled or triggered by the DCI that was received or detected among the DCIs that scheduled or triggered the UL channel. You may.

For example, in the case where the DCI scheduling or triggering the A-SRS is detected before the DCI scheduling or triggering the UL channel and the resources of the A-SRS and the UL channel overlap, the UE prefers the SRS. You may decide that. In this case, the UE may rate match or puncture the UL channel in the portion of the UL channel that overlaps the SRS resource and transmit the UL channel and SRS. Here, the UE may rate match or puncture the UL channel based on at least one of embodiments 2-1 to 2-6 described below. Also, in this case, the UE may drop the UL channel and send an SRS. For example, in the case where the DCI scheduling or triggering the A-SRS is detected after the DCI scheduling or triggering the UL channel and the resources of the A-SRS and the UL channel overlap, the UE prefers the UL channel. You may decide that. In this case, the UE may drop the ASRS and transmit the UL channel. In these cases, since the UL transmission processing corresponding to the DCI is performed when the UE receives the previous DCI, it is possible to avoid interrupting the UL transmission processing by the subsequent reception of the DCI.

The UE also determines whether to prioritize the DCI that scheduled or triggered the SRS or the SRS or UL channel that was later scheduled or triggered by the DCI that was received or detected among the DCIs that scheduled or triggered the UL channel. You may. For example, in the case where the DCI that scheduled or triggered the A-SRS was detected after the DCI that scheduled or triggered the UL channel, and the resources of the A-SRS and the UL channel overlapped, the UE should prioritize the SRS. May be determined. In this case, the UE may rate match or puncture the UL channel in the portion of the UL channel that overlaps the SRS resource and transmit the PUSCH and SRS. Here, the UE may rate match or puncture the UL channel based on at least one of embodiments 2-1 to 2-6 described below. Also, in this case, the UE may drop the UL channel and send an SRS. For example, in the case where the DCI scheduling or triggering the A-SRS is detected before the DCI scheduling or triggering the UL channel and the resources of the A-SRS and PUSCH overlap, the UE prefers the UL channel. You may decide that. In this case, the UE may drop the ASRS and transmit the UL channel. In these cases, the UE interrupts the processing of the previously scheduled or triggered UL transmission by considering that the later scheduled or triggered UL transmission is more important than the earlier scheduled or triggered UL transmission. Therefore, the more important UL transmission processing can be prioritized.

[Priority UL transmission determination method 2]
If the resources of the SRS or UL channel overlap, the UE will use the type of search space used to detect the DCI of at least one scheduling or trigger of the SRS and UL channels (eg, common search space (CSS)). ), (UE-specific search space (USS))), which may be prioritized for UL transmission of SRS or UL channel.

For example, the UE may preferentially transmit UL transmission scheduled or triggered by DCI detected in CSS. Also, for example, the UE may preferentially transmit SRS or UL channels scheduled or triggered by DCI detected in the USS.

[Priority UL transmission determination method 3]
If the resources of the SRS or UL channel overlap, the UE will use the UL of either the SRS or UL channel based on the index of the cell or CC used to detect the DCI of at least one scheduling or trigger of the SRS and UL channel. You may decide whether to prioritize transmission.

The UE may preferentially transmit at least one of the SRS or UL channels scheduled or triggered by the DCI detected in the cell smaller in the component carrier (CC, serving cell) index or in the primary cell (PCell). .. Also, at least one of the SRS or UL channels scheduled or triggered by the DCI detected in the cell with the larger CC index may be preferentially transmitted.

[Priority UL transmission determination method 4]
When the resources of the SRS and UL channels are duplicated, the UE may decide whether to prioritize UL transmission of SRS or UL channel based on the respective types of SRS and UL channels.

The type of UL transmission is carried by the UL channel and the transmission timing of either periodic (periodic (P)), semi-persistent (SP), or aperiodic (aperiodic (A)). It may be defined by at least one of the contents. The type of SRS may be any of P-SRS, SP-SRS, and A-SRS. The types of PUCCH are transmitted to semi-persistents such as PUCCH (periodic PUCCH) transmitted periodically such as P-CSI report and HARQ-ACK for SP-CSI report and DL-semi-persistent (SPS) transmission. It may be either a PUCCH (semi-persistent PUCCH) to be generated and a PUCCH (aperiodic PUCCH) transmitted aperiodically such as SR, HARQ-ACK, and A-CSI reports. The types of PUSCH are the PUSCH (periodic PUSCH) transmitted periodically such as the type 1 configured grant PUSCH and the PUSCH (semi-persistent) transmitted to the semi-persistent such as the type 2 configured grant PUSCH. It may be either a stent PUSCH) or a PUSCH (aperiodic PUSCH) transmitted aperiodically, such as a dynamic grant PUSCH. The content carried by the UL channel may be of UCI type (SR, HARQ-ACK, CSI (eg, P-CSI report, SP-CSI report, A-CSI report)). The UCI may be carried by PUCCH or by PUSCH.

As shown in FIG. 4, which UL transmission is prioritized may be specified based on the type of SRS and the type of PUCCH. For example, if the A-SRS resource and the aperiodic PUCCH resource overlap, the UE may prefer the aperiodic PUCCH (drop or puncture or rate match the aperiodic PUCCH and A-SRS. You may send the whole of). For example, if the resources of the A-SRS and the resources of the periodic PUCCH overlap, the UE may prioritize the A-SRS (drop or puncture the periodic PUCCH and send the entire A-SRS). May be good). For example, if the P-SRS resource and the periodic PUCCH resource overlap, the UE may prefer the periodic PUCCH (drop or puncture the P-SRS and send the entire periodic PUCCH. May be good).

Priority may be specified for the type of SRS and the type of UL channel (PUCCH, UCI, PUSCH, etc.). The UE may prioritize UL transmission having a lower priority value, or may prioritize UL transmission having a higher priority value.

Aperiodic UL transmission, semi-persistent UL transmission, and periodic UL transmission may be prioritized in this order. Next, PUCCH may be prioritized when SRS and PUCCH are of the same type. For example, priorities 1 to 6 are associated with aperiodic PUCCH, A-SRS, semi-persistent PUCCH, SP-SRS, periodic PUCCH, P-SRS, respectively, and the UE is smaller than the priority value. UL transmission may be prioritized. For example, if the aperiodic PUCCH and A-SRS overlap, the UE may prefer A-SRS with a lower priority value (drop or puncture or rate match the aperiodic PUCCH and A- The entire SRS may be transmitted).

Periodic UL transmission, semi-persistent UL transmission, and aperiodic UL transmission may be prioritized in this order.

PUCCH or UCI may be prioritized. For example, priorities 1 to 6 are associated with aperiodic PUCCH, semi-persistent PUCCH, periodic PUCCH, A-SRS, SP-SRS, P-SRS, respectively, and the UE is the priority (priority). UL transmission with a smaller value may be prioritized. For example, if the aperiodic PUCCH and the A-SRS overlap, the UE may prioritize the aperiodic PUCCH with a lower priority value (dropping or puncturing the A-SRS and the aperiodic PUCCH. May be sent in its entirety).

[Priority UL transmission determination method 5]
When the resources of the SRS and the UL channel overlap, the UE decides to preferentially transmit either the SRS or the UL channel based on the index (index relationship) for each resource of the SRS and the UL channel. You may.

For example, it may be decided to preferentially transmit at least one of the SRS resource and the UL channel resource, whichever has the smaller time index, of the SRS resource and the UL channel resource. Further, for example, it may be determined to preferentially transmit at least one of the SRS and UL channels having the larger time index among the SRS transmission resource and the PUSCH transmission resource. The time index may be an index of the time resource at the start or end of UL transmission. The time resource may be any of a symbol, a minislot, a subslot, and a slot.

For example, it may be decided to preferentially transmit at least one of the SRS or UL channel having the smaller frequency index among the SRS resource and the PUSCH resource. Further, for example, it may be determined to preferentially transmit at least one of the SRS or UL channel having the larger frequency index among the SRS transmission resource and the PUSCH transmission resource. The frequency index may be the index of the lowest (start) or highest (end) frequency resource of UL transmission. The frequency resource may be any of a subcarrier interval, a resource element (RE), a resource block (RB), a CC, a cell, and a band.

According to the first embodiment, when the SRS resource overlaps with the UL channel resource, the other can be appropriately transmitted by not transmitting a part or all of one of the SRS or UL channel. In addition, it is possible to appropriately determine whether to prioritize the SRS or UL channel.

<Embodiment 2>
If the SRS and UL channel resources overlap, the UE may rate match (or puncture) the UL channel (reduce UL channel resources) and transmit the SRS and UL channels.

When the resources of the SRS and the UL channel overlap, the UE may rate match (or puncture) the UL channel based on at least one of the following embodiments 2-1 to 2-6.

<< Embodiment 2-1 >>
When the resources of the SRS and the UL channel overlap, the UE does not use the RE used for the transmission of the SRS for the transmission of the UL channel and the demodulation reference signal (DMRS) of the UL channel, but the RE used for the transmission of the SRS. UL channels may be rate matched (or punctured) in. When an SRS resource having a Comb configuration is set in the UE, the only RE used to transmit the SRS is the RE to which the SRS sequence is mapped.

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

In this case, the increase in the coding rate of the UL channel can be minimized to suppress the deterioration of the communication quality, and the transmission can be performed efficiently, and the throughput of the UL channel can be improved.

<< Embodiment 2-2 >>
When the resources of SRS and UL channel overlap, the UE does not use the resource set for SRS (SRS resource range) to transmit DMRS of UL channel and UL channel, but in the resource set for SRS. UL channels may be rate matched (or punctured). When an SRS resource with a Comb configuration is configured on the UE, the SRS resource range is not only the RE used for transmissions based on the set Comb offset value, but also the RE used for transmissions based on other values of the Comb offset. including.

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

When the SRS resource of Comb4 is set, the SRS resource range is as shown in FIG. 6, and the SRS transmission of all REs (SRS transmission of the UE for which the Comb offset is set and other UEs) used for transmission of Comb offset = 0 to 3 are set. RE) that may be used for SRS transmission is included.

Among the SRS resources, the resources that are not mapped to the UL channel due to the rate match or puncture in the above-described 2-2 may be used for the SRS of another UE (for example, the SRS having a different Comb offset). Therefore, by using the second embodiment, it is possible to prevent the UL channel of the UE from colliding or interfering with the SRS of another UE even when the SRS of a plurality of UEs is multiplexed by the comb. it can.

<< Embodiment 2-3 >>
If the SRS and UL channel resources overlap, the UE does not use the SRS symbol to transmit the UL and UL channel DMRS, but rates the UL channel at the SRS symbol (all REs within the SRS symbol). It may be a match (or puncture).

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

In this case, SRSs having different lengths (bandwidths) may be transmitted by other UEs in the SRS symbol that overlaps with the UL channel of a certain UE. By not mapping the UL channel to the SRS symbol, it is possible to avoid collisions or interference between the UL channel of the UE and the SRS of other UEs.

<< SRS frequency hopping >>
Even when SRS with frequency hopping is configured, the UE may rate match or puncture the UL channel based on at least one of embodiments 2-1 to 2-3 described above.

When SRS with frequency hopping is set and the resources of SRS and UL channel overlap, the UE uses RE used for transmission of SRS to transmit the UL channel and the demodulation reference signal (DMRS) of the UL channel. The UL channel may be rate-matched (or punctured) in the RE used for SRS transmission without use. That is, the UL channel may be rate matched or punctured based on the method of embodiment 2-1 described above.

In FIG. 7A, the SRS resource of the first hop (before frequency hopping) and the SRS resource of the second hop (after frequency hopping) are arranged in the same slot as the PUSCH resource, and the SRS resource of the second hop and the SRS resource of the second hop are arranged. The PUSCH resource and is duplicated in the final symbol of the PUSCH resource. In this case, in the RE used for transmitting the SRS, the PUSCH is rate-matched (or punctured), and the SRS and the PUSCH are transmitted.

Further, when SRS with frequency hopping is set and the resources of SRS and UL channel overlap, the UE transmits the resource (SRS resource range) set for SRS to the UL channel and the DMRS of the UL channel. UL channels may be rate-matched (or punctured) in resources configured for SRS instead of being used for. That is, the UL channel may be rate matched or punctured based on the method of Embodiment 2-2 described above. When an SRS resource with a Comb configuration is configured on the UE, the resource configured for SRS is based on the RE used for transmission based on the value of the configured Comb offset, as well as other values of the Comb offset. Includes RE used for transmission.

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

If SRS with frequency hopping is configured and the resources of SRS and UL channel overlap, the UE does not use the SRS symbol to transmit the DMRS of UL channel and UL channel, but overlaps the resource with UL channel. UL channels may be rate-matched (or punctured) at the SRS symbol (all REs within the SRS symbol). 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 resource and the set SRS resource are the same as those of FIG. 7A. In this case, the PUSCH is rate-matched (or punctured) at the symbol (period) in which the SRS that overlaps the PUSCH resource is set, and the SRS and the PUSCH are transmitted.

<< Embodiment 2-4 >>
In addition to the resource for SRS, the UE may be notified of information (target Comb) indicating in which resource of the Comb the UL channel should be rate-matched (or punctured).

For example, the UE may be notified of a bitmap showing the Comb offset of the target Comb. The UE notified of the bitmap may perform rate matching or puncturing of the UL channel at the RE corresponding to the Comb offset indicated by the bitmap.

For example, a UE may be configured for some UEs or other UEs as well as the number of CDM group without data for the DMRS code division multiplexing (CDM) group. You may be notified of the number. The UE notified of the number of Combs may determine the target Comb according to the selection rule. For example, in the selection rule, the UE may always select only the number of Combs notified as priority from the one with the smallest (or larger) Comb offset as the target Comb, or the Comb notified as the SRS resource. The target Comb may be selected from the offset to the Comb offset obtained by incrementing (or decrementing) the notified number of combs. The UE may keep the Comb offset within the effective range if the comb offset is out of the effective range due to increment or decrement. For example, when the maximum Comb offset is exceeded by the increment, the UE may obtain the Comb offset by the remainder (modulo operation) due to the maximum Comb offset of the increment result.

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

FIG. 8 shows a case where the UE is notified of the Comb offset = 0 as the SRS resource and the Comb offset = 1 as the target Comb. In this case, Comb offset = 0 indicates an SRS resource (RE used for SRS transmission). Comb offset = 1 is not the RE used for SRS transmission, but indicates the RE at which the PUSCH rate match (or puncture) is performed. Comb offset = 2 and Comb offset = 3 are not REs used for SRS transmission, but REs in which PUSCH rate matching is not performed. That is, Comb offset = 2 and Comb offset = 3 indicate RE to which the PUSCH is mapped when the PUSCH is scheduled.

<< Embodiment 2-5 >>
Only when the UL channel is Cyclic Prefix (CP) -OFDM (CP-OFDM waveform) (transform precoding is not applied to the UL channel) will the UE be able to perform the above embodiments 2-1, 2-2, 2- Any one of 4 may be applied. In this case, the SRS uses a low peak to average power ratio (PAPR) series, whereas the above embodiments 2-1, 2-2, and 2-4 include SRS transmission and UL channel transmission. Since there is a possibility of frequency division multiplexing (FDM), it is possible to suppress an increase in PAPR due to the combination of CP-OFDM and FDM.

When the UL channel is Discrete Fourier Transform-Spread (DFT-S) -OFDM (DFT-S-OFDM waveform) (transform precoding is applied to the UL channel), the UE performs the above embodiment 2-3. May be applied. In this case, the increase in PAPR can be suppressed by combining DFT-S-OFDM and FDM.

<< Embodiment 2-6 >>
In the above embodiments 2-1 and 2-2, when the DMRS of the UL channel is punctured, the UE may generate a DMRS sequence having a DMRS sequence length before the puncture, or the size of the resource that can be used after the puncture. A DMRS series having a series length corresponding to (RE number) may be generated.

A DMRS sequence (eg, a low PAPR sequence) is generated using the pre-punctured DMRS sequence length, and by puncturing the DMRS, it can be orthogonalized when multiplexed with the DMRS of another UE having the same sequence length. , Interference between UEs can be suppressed. PAPR can be suppressed by transmitting a DMRS sequence having a sequence length corresponding to the size of the resource that can be used after puncturing. A DMRS series with a series length corresponding to the size of resources available after puncture may be specified in the specification. The UE does not have to expect the size of resources available after puncture to be a series length that is not specified in the specification.

According to the second embodiment, when the SRS resource overlaps with the UL channel resource, the UL channel and the SRS can be appropriately transmitted by reducing the UL channel resource.

<Embodiment 3>
Hereinafter, in the third embodiment, a method of controlling the retransmission of the UL channel when the SRS resource and the UL channel resource overlap 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 following embodiments 3-1 to 3-3.

<< Embodiment 3-1 >>
The UE may control the rate matching (or puncture) of the UL channel depending on whether the SRS resource and the UL channel resource overlap each time the UL channel is transmitted (in each of the initial transmission and the retransmission). .. When the SRS resource and the UL channel resource overlap, the UE does not have to use the overlapping resource (RE, SRS resource range, or SRS symbol) to transmit the UL channel (the UL channel resource may be reduced). ..

If the UL channel resource overlaps with the SRS resource in each of the initial transmission and retransmission of the UL channel, the UE may transmit the UL channel and SRS according to the 2-1 embodiment.

In UL channel retransmission, if the UL channel resource does not overlap with the SRS resource, the UE may use all of the UL channel resources for UL channel retransmission or part of the UL channel resource for UL channel retransmission. You may. At least one of transport block size (TBS), resource size, and number of encoded bits may be the same between the initial transmission and retransmission of the UL channel. If the UL channel resource overlaps the SRS resource in the initial transmission of the UL channel, and the UL channel resource does not overlap the SRS resource in the retransmission of the UL channel, the UE determines the size of the UL channel resource of the retransmission (for example, PRB size). And at least one of the number of assigned symbols) may be reduced. The UE may reduce the retransmission UL channel resource by a specific size until the retransmission TBS is equal to the initial TBS. The specific size may be 1 physical resource block (PRB) or 1 physical resource block group (PRG). The PRG may be a continuous PRB to which the same precoding of DL is applied. The UE may assume that the same precoding is applied to the contiguous allocation of DLs for multiple PRBs within the PRG.

In the example of FIG. 9A, in the initial transmission of the PUSCH, the PUSCH resource and the SRS resource (SRS # 1) overlap as in FIG. 5A described above, and the UE performs the initial transmission of the PUSCH according to the embodiment 2-1. And SRS (SRS # 1) are transmitted. Instead of the 2-1 embodiment, any of the 2-2, 2-3 embodiments may be used.

In the example of FIG. 9B, when the PUSCH resource and the SRS resource do not overlap in the PUSCH retransmission of FIG. 9A, the UE uses all of the PUSCH retransmission resources for the PUSCH retransmission. In other words, the UE also uses the RE of the same arrangement (symbol position and subcarrier position) as the RE that overlaps with the SRS among the resources of the initial transmission of the PUSCH to retransmit the PUSCH.

When the UL channel resource overlaps with the SRS resource in the UL channel retransmission, the UE does not use the SRS RE for the UL channel (without mapping) among the UL channel retransmission resources and does not overlap with the SRS RE. RE may be used (mapped) for UL channels.

In the example of FIG. 9C, when the PUSCH resource and the SRS resource overlap in the retransmission of the PUSCH of FIG. 9A, and the arrangement of SRS # 2 overlapping with the retransmission is different from the arrangement of SRS # 1 overlapping with the initial transmission, the UE is Of the resources for retransmission of PUSCH, RE of SRS # 2 is not used for PUSCH, and RE that does not overlap with RE of SRS # 2 is used for PUSCH.

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

<< Embodiment 3-2 >>
The UE uses the resource of the arrangement used for the initial transmission of the UL channel (that is, the arrangement and size of the UL channel rate-matched (or punctured) by the overlap of the SRS and the initial transmission UL channel) as the UL channel resource for retransmission. You may use it.

In the UL channel retransmission, if the UL channel resource does not overlap with the SRS resource, the UE may use the arrangement used for the initial transmission of the UL channel for the UL channel retransmission. When the UE does not use the RE that overlaps with the SRS among the resources of the UL channel initial transmission for the UL channel, the UE does not use the RE at the same position as the RE that was not used for the initial transmission for the UL channel retransmission. May be good. In this case, the UE does not have to use the RE having the same arrangement as the RE that was not used for the initial transmission for the retransmission of the UL channel, regardless of whether or not the retransmission resource overlaps with the SRS resource.

The example of FIG. 10A is the same as that of FIG. 9A, and the UE performs the initial transmission of PUSCH and the transmission of SRS (SRS # 1) according to the 2-1 embodiment.

In the example of FIG. 10B, in the retransmission of the PUSCH of FIG. 10A, when the PUSCH resource and the SRS resource do not overlap, the UE retransmits the RE of the same arrangement as the RE not used for the initial transmission of the PUSCH of FIG. 10A. (Rate match or puncture the retransmission of the PUSCH at the same position as in FIG. 10A), and retransmit the PUSCH.

When the UL channel resource overlaps with the SRS resource in the UL channel retransmission, the UE does not use the UL channel retransmission resource having the same arrangement as the RE not used for the initial transmission for the UL channel retransmission. The RE with the same arrangement as the RE used for the initial transmission may be used 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). In addition, the UE may drop the SRS.

In the example of FIG. 10C, when the PUSCH resource and the SRS resource overlap in the retransmission of the PUSCH of FIG. 10A, and the arrangement of SRS # 2 overlapping with the retransmission is different from the arrangement of SRS # 1 overlapping with the initial transmission, the UE is , Of the resources for retransmitting PUSCH, the PUSCH is not mapped to the RE having the same arrangement as the RE not used for the initial transmission of PUSCH, the PUSCH is retransmitted, and SRS # 2 is dropped.

Further, when the PUSCH resource and the SRS resource are duplicated in the PUSCH retransmission of FIG. 10A and the arrangement of SRS # 2 overlapping with the retransmission is the same as the arrangement of SRS # 1 overlapping with the initial transmission, the UE is set to PUSCH. Of the resources for resending, PUSCH is not mapped to the RE with the same arrangement as the RE that is not used for the initial transmission of PUSCH, retransmission is performed, and SRS # 2 is dropped.

According to the third embodiment, the TBS can be equalized between the initial transmission and the retransmission of the UL channel.

<< Embodiment 3-3 >>
When the UL channel resource overlaps with the SRS resource in the UL channel retransmission, the UE selects the RE of the same arrangement as the RE not used for the initial transmission and the UL of the SRS among the resources of the UL channel retransmission. Instead of using it for channel retransmission, other REs may be used for UL channel retransmissions (in the RE with the same arrangement as the SRS at the time of initial transmission and the RE of the SRS at the time of retransmission, the PUSCH retransmission is rate-matched or punctured. May be). In addition, the UE may transmit an SRS that overlaps with the UL channel retransmission resource.

The example of FIG. 11A is the same as that of FIG. 9A, and the UE performs the initial transmission of PUSCH and the transmission of SRS (SRS # 1) according to the 2-1 embodiment.

In the example of FIG. 11B, when the PUSCH resource and the SRS resource overlap in the retransmission of the PUSCH of FIG. 11A, and the arrangement of SRS # 2 overlapping with the retransmission is different from the arrangement of SRS # 1 overlapping with the initial transmission, the UE is Of the resources for retransmitting PUSCH, the RE with the same arrangement as the RE not used for the initial transmission of PUSCH and the RE of SRS # 2 are retransmitted without mapping the PUSCH, and the entire SRS # 2 is transmitted. ..

Further, when the PUSCH resource and the SRS resource are duplicated in the PUSCH retransmission of FIG. 11A and the arrangement of SRS # 2 overlapping with the retransmission is the same as the arrangement of SRS # 1 overlapping with the initial transmission, the UE is set to PUSCH. Of the resources of the retransmission of, the PUSCH is not mapped to the RE having the same arrangement as the RE that is not used for the initial transmission of the PUSCH, the reproduction is performed, and the entire SRS # 2 is transmitted.

According to the third embodiment, the SRS that overlaps with the retransmission of the PUSCH can be transmitted with priority.

<Embodiment 4>
Hereinafter, in the fourth embodiment, control when the UL channel over a plurality of slots (multi-slot UL channel) is supported and the multi-slot UL channel and the SRS overlap will be described.

<< Embodiment 4-1 >>
The UE may control the rate match (or puncture) of the UL channel for each transmission slot of the UL channel in the multi-slot UL channel, depending on whether the SRS resource and the UL channel resource overlap.

For example, when the SRS resource and the UL channel resource overlap, the UE does not have to use the duplicate resource for UL channel transmission according to at least one of Embodiments 2-1 to 2-3 (to the overlapping resource). The UL channel does not have to be mapped), and if the SRS resource and the UL channel resource do not overlap, the UL channel resource may be used to transmit the UL channel (the UL channel may be mapped to the UL channel resource). ..

For example, as shown in FIG. 12, when the PUSCH resource and the SRS # 1 resource overlap in slot # 2, and the PUSCH resource and SRS # 2 resource overlap in slot # 4, the UE is an embodiment. According to 2-1 it is not necessary to map the PUSCH to the RE where SRS # 1 and # 2 overlap (the PUSCH may be rate matched or punctured in the RE where SRS # 1 and # 2 overlap).

<< Embodiment 4-2 >>
Of the UL channel resources in the first slot in the multi-slot UL channel, the UE sets the RE that is not used for UL channel transmission (UL channel is not mapped) to the slots after the first slot (subsequent slots, second and subsequent slots). It may not be used for the UL channel of the slot) (the UE may rate match or puncture the UL channel of the subsequent slot in the same arrangement as the RE of the UL channel resources in the first slot that is not used for UL channel transmission. Good). The UE may use the UL channel arrangement used in the UL channel of the first slot in the multi-slot UL channel for the UL channel of the subsequent slot. In this case, for the control of the SRS that overlaps with the transmission slot of the subsequent UL channel, any one of the following subsequent slot transmission methods 1 to 3 may be used.

[Subsequent slot transmission method 1]
In the subsequent slot, if the same arrangement as the PUSCH transmission in the first slot and the SRS resource overlap, the UE may always drop the duplicate SRS.

For example, as shown in FIG. 13, the PUSCH resource and the SRS # 1 resource overlap in the first slot (slot # 1) of the multi-slot PUSCH, and the PUSCH resource and the SRS # 2 resource overlap in slot # 4. In the case of duplication, the UE does not map the PUSCH to the RE used for SRS # 1 transmission among the PUSCH resources in slot # 1, but maps the PUSCH to the other REs for transmission. In this case, the UE uses the arrangement used for PUSCH transmission in slot # 1 for PUSCH transmission in slots # 2 to 4 (in slots # 2 to 4, PUSCH is mapped to the same arrangement as PUSCH transmission in slot # 1). ). In slot # 4, the UE drops SRS # 2, which overlaps with the PUSCH resource.

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

[Subsequent slot transmission method 2]
If the RE of the SRS overlaps with the RE of the same arrangement as the PUSCH transmission of the first slot in the subsequent slot, the UE may drop the SRS. If the RE of the SRS does not overlap with the RE of the same arrangement as the RE of the PUSCH transmission of the first slot in the subsequent slot, the UE may transmit the SRS.

For example, as in FIG. 13 described above, in slot # 4, when the RE in the same arrangement as the PUSCH transmission in slot # 1 and the RE in SRS # 2 overlap (the arrangement of RE in SRS # 2 is RE in SRS # 1). (If different from the arrangement of), the UE drops SRS # 2 as in FIG.

For example, as shown in FIG. 14, as in FIG. 13, REs having the same arrangement as PUSCHs of slot # 1 are used in PUSCHs of slots # 2 to # 4, but REs and SRSs having the same arrangements are used in slot # 4. If the RE of # 2 does not overlap (the arrangement of RE in SRS # 2 is the same as the arrangement of RE in SRS # 1), the UE transmits the entire SRS # 2.

By the subsequent slot transmission method 2, the TBS can be made equal for each slot, and the load on the UE can be suppressed.

[Subsequent slot transmission method 3]
If the SRS resource overlaps the UL channel resource in the subsequent slot, the UE may transmit the SRS in the subsequent slot. In this case, the UE does not use the RE of the same arrangement as the RE of the SRS of the first slot (RE not used for the UL channel transmission of the first slot) and the RE of the SRS in the subsequent slot for the UL channel transmission. (In the succeeding slot, the UL channel may be rate-matched or punctured in the RE having the same arrangement as the SRS in the first slot and the RE in the SRS).

For example, as shown in FIG. 15, in the same manner as in FIG. 13 described above, when the RE in the same arrangement as the PUSCH transmission in slot # 1 and the RE in SRS # 2 overlap in slot # 4 (RE in SRS # 2). If the arrangement is different from the arrangement of RE in SRS # 1), the UE will place RE in slot # 4 with the same arrangement as RE in SRS # 1 in slot # 1 and RE in SRS # 2 in slot # 4. PUSCH is transmitted without being used for PUSCH, and SRS # 2 is transmitted.

<< Embodiment 4-3 >>
The UE does not have to use the UL channel resource in the multi-slot UL channel and the resource having the same arrangement as the overlapping SRS resource (SRS resource range) in at least one slot for transmitting the UL channel in all slots (all). The UL channel may not be mapped to a resource in the same arrangement as the SRS resource that overlaps in at least one slot, and the UL channel may be transmitted.) (In all slots, overlap in at least one slot. UL channels may be rate matched or punctured in resources with the same placement as SRS resources).

For example, as shown in FIG. 16, when the PUSCH resource and the resource of SRS # 1 overlap in slot # 1, and the PUSCH resource and the resource of SRS # 2 overlap in slot # 4, the UE is in slot # 1. In all of ~ # 4, the PUSCH is transmitted without using the entire resource of the same arrangement as the resource of SRS # 1 and SRS # 2 for the PUSCH, and the entire SRS # 1 and # 2 are transmitted.

The UE does not have to use a RE in the same arrangement as the RE of the SRS that overlaps the UL channel resource of at least one slot in the multi-slot UL channel for the UL channel of all the slots of the multi-slot UL channel (multi). The UL channel may be transmitted without mapping the RE of the same arrangement as the RE of the SRS that overlaps the UL channel resource of at least one slot in the slot UL channel to the UL channel of all the slots of the multi-slot UL channel. (The UL channels of all slots of the multi-slot UL channel may be rate-matched or punctured in a RE of the same arrangement as the RE of the SRS that overlaps the UL channel resource of at least one slot in the multi-slot UL channel.) ..

According to the fourth embodiment, the TBS between slots can be made equal, and SRS can be transmitted in any slot, so that at least one of throughput improvement and quality improvement by SRS measurement becomes possible.

<< Embodiment 4-4 >>
Rel. At 15 NR, the SRS can be mapped to up to 4 consecutive symbols (multi-symbol SRS). Rel. In 15 NR, a short PUCCH (eg, PUCCH format 0, 2) that maps to 1 or 2 symbols is specified. Different spatial relations (spatial relations, beams, spatial domain transmission filters) may be applied to multiple symbols in the multi-symbol SRS.

When the multi-symbol SRS and the short PUCCH overlap (collision), the UE may process according to any of the following processing methods 1 to 4.

[Processing method 1]
When the multi-symbol SRS and the short PUCCH collide at least partially, the UE may rate match or puncture the multi-symbol SRS or the short PUCCH only in the colliding part. In this case, the UE may puncture the multi-symbol SRS and transmit the entire short PUCCH.

[Processing method 2]
When the multi-symbol SRS and the short PUCCH collide at least partially, the multi-symbol SRS or the short PUCCH may be rate-matched or punctured only in the colliding symbols. In this case, the UE may puncture the multi-symbol SRS and transmit the entire short PUCCH.

[Processing method 3]
The multi-symbol SRS may be dropped if the multi-symbol SRS and the short PUCCH collide at least partially.

[Processing method 4]
The short PUCCH may be dropped when the multi-symbol SRS and the short PUCCH collide at least partially.

According to the above embodiment, UL transmission can be appropriately controlled even when the resources of the SRS and UL channels are duplicated.

<Embodiment 5>
Since SRS is transmitted over a wide band, the UL channel resources of one UE and the resources of SRS of another UE may overlap.

For example, as shown in FIG. 17A, there may be a case where the PUSCH resource in one slot of UE # 1 overlaps with the SRS resource of UE # 2. Further, as shown in FIG. 17B, the PUSCH (multi-slot PUSCH) resources spanning slots # 1 to # 4 of UE # 1 are the SRS resource of UE # 2 in slot # 2 and the SRS resource of UE # 2 in slot # 4. There may be cases where it overlaps with.

In such a case, if UE # 1 cannot properly control the UL channel resource of UE # 1 that overlaps with the SRS resource of UE # 2, the communication quality deteriorates.

Therefore, the present inventors have conceived a method of appropriately controlling UL transmission resources that overlap with SRS resources of other UEs.

The UE may be set with zero power (Zero Power (ZP)) -SRS resource in addition to the SRS resource (Non-Zero Power (ZP) -SRS resource). NZP-SRS may be read as SRS whose power is not zero, SRS which is actually transmitted, SRS which has transmission power, and the like. ZP-SRS may be read as SRS having zero power, SRS not actually transmitted, SRS having no transmission power, and the like.

ZP-SRS resources are provided by higher layer signaling (for example, SRS setting information, SRS resource set setting information, SRS resource setting information, ZP-SRS setting information, ZP-SRS resource set setting information, ZP-SRS resource setting information, etc.). It may be set in the UE (it may be received). The ZP-SRS resource is notified as an SRS resource set or SRS resource with a new usage, such as indicating that the usage (eg usage) in the SRS resource set is ZP-SRS (eg zeroPower). It may be set or specified by new parameters (eg, ZP-SRS resource set or ZP-SRS resource). The ZP-SRS resource may be a resource with frequency hopping.

The ZP-SRS resource and the ZP-SRS resource set including the ZP-SRS resource may be read as each other.

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

Similar to the SRS type (P-SRS, SP-SRS, A-SRS), the ZP-SRS type (P-ZP-SRS, SP-ZP-SRS, A-ZP-SRS) is defined. May be good. The type of ZP-SRS may be set by higher layer signaling.

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

It may be assumed that the spatial relation is not set for at least one of the ZP-SRS resource set and the resource. Further, the transmission power control (TPC) parameter (α, P0, etc.) may not be set.

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

The UE in which the ZP-SRS resource is set may transmit PUCCH or DMRS of PUCCH with the ZP-SRS resource. In this case, there is an effect of improving the throughput of DL.

The UE with the ZP-SRS resource set may transmit a PUCCH or PUCCH DMRS containing a particular type of uplink control information (UCI) (eg, HARQ-ACK, etc.). In this case, there is an effect of improving the throughput of DL.

(Structure of ZP-SRS)
The configuration of ZP-SRS may have a Comb configuration in the same manner as the configuration of SRS. Comb configuration is set by Comb2 (1RE ZP-SRS is arranged every 2RE, FIG. 18A), Comb4 (1RE ZP-SRS is arranged every 4RE, FIG. 18B), and no Comb (ZP-SRS resource). ZP-SRS may be arranged in all REs in the band (PRB, range), for example, Comb0, Comb value = 0, FIG. 18C), or any of them may be set in the UE. When a plurality of terminals set with different Comb offsets of resources having the same time and frequency as SRS resources perform SRS transmission, the UE is set to have no Comb, so that the UL transmission of the UE and other UEs are performed. It is possible to avoid duplication with the SRS corresponding to all the Comb offsets of.

The UE has a ZP-SRS configuration as a Rel. 15 The same configuration as the SRS configuration of NR may be set, and Rel. 15 A configuration including an NR SRS configuration may be set. The UE can identify the ZP-SRS resource in the same manner as the NZP-SRS resource.

When the resources of the ZP-SRS and the UL channel (for example, at least one of PUSCH and PUCCH) overlap, the UE may rate match (or puncture) the UL channel and transmit the UL channel.

In at least one of the above-mentioned first to fourth embodiments, SRS may be read as ZP-SRS. In this case, the RE indicated by the Comb configuration of the ZP-SRS resource or ZP-SRS resource may not be used for UL transmission (UL transmission may not be mapped) (ZP-SRS resource or ZP-SRS). UL transmissions do not have to be drop, punctured, or rate matched in the RE indicated by the Comb configuration of the resource).

When the resources of the ZP-SRS and the UL channel overlap, the UE may rate match (or puncture) the UL channel based on any of the following embodiments 5-1 to 5-3.

<< Embodiment 5-1 >>
When the resources of ZP-SRS and UL channel are duplicated, the UE does not have to use the RE duplicated with the resource element (RE) of ZP-SRS to transmit the DMRS of UL channel (ZP-SRS is valid). UL channels may be rate matched (or punctured) at a RE). Here, the RE for which ZP-SRS is effective is the RE shown by the Comb configuration as shown in FIGS. 18A-18C.

For example, as shown in FIG. 19A, when the set Comb2 ZP-SRS resource overlaps with the PUSCH resource, the UE rate-matches (or punctures) the PUSCH in the RE in which ZP-SRS is valid. , PUSCH is transmitted.

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

<< Embodiment 5-2 >>
When the resources of ZP-SRS and UL channel overlap, the UE does not use the resource (ZP-SRS resource range) set for ZP-SRS to transmit DMRS of UL channel and UL channel, and ZP- UL channels may be rate matched (or punctured) within the SRS resource range. When a ZP-SRS resource with a Comb configuration is configured on the UE, the ZP-SRS resource range includes not only the RE indicated by the value of the set Comb offset, but also the RE indicated by other values of the Comb offset. ..

For example, as shown in FIG. 19B, as in FIG. 19A described above, when the ZP-SRS resource overlaps with the PUSCH resource, the UE rate-matches (or punctures) the PUSCH in the ZP-SRS resource range, and the PUSCH To send.

The ZP-SRS resource range may be used for SRS transmission by other UEs. Therefore, according to the 5-2 embodiment, even if a Comb different from the Comb of the set ZP-SRS resource is used for SRS transmission of another UE, the UE of the UL channel of the UE and the Comb of the other UE It is possible to prevent the SRS from colliding or interfering.

<< Embodiment 5-3 >>
When the resources of ZP-SRS and UL channel are duplicated, the UE does not use the symbol of ZP-SRS to transmit DMRS of UL channel and UL channel, and the symbol of ZP-SRS (all in the symbol of ZP-SRS). The UL channel may be rate matched (or punctured) in RE).

For example, as shown in FIG. 19C, as in FIG. 19A described above, when the ZP-SRS resource overlaps with the PUSCH resource, the PUSCH is rate-matched (or punctured) at the symbol (period) in which the ZP-SRS is set. Then, the PUSCH is transmitted.

In this case, in the ZP-SRS symbol that overlaps with the UL channel of the UE, another SRS having a different length (bandwidth) may be transmitted by another UE. By not mapping the UL channel to the ZP-SRS symbol, it is possible to avoid collisions or interference between the UL channel of the UE and the SRS of other UEs at that symbol.

<Embodiment 6>
If the ZP-SRS resource and the NZP-SRS resource overlap, the UE may drop or puncture the NZP-SRS.

When the ZP-SRS resource and the NZP-SRS resource overlap, the UE may drop or puncture the NZP-SRS based on any of the following embodiments 6-1 to 6-4.

<< Embodiment 6-1 >>
When the ZP-SRS resource and the NZP-SRS resource overlap, the UE does not have to transmit the NZP-SRS in the RE in which the ZP-SRS is arranged. In other words, the UE may puncture or drop the RE of the NZP-SRS that overlaps the RE in which the ZP-SRS is located.

In the example of FIG. 20A, the ZP-SRS resource overlaps with the NZP-SRS resource, but the RE in which the ZP-SRS is arranged and the RE in the NZP-SRS do not overlap. In this case, the UE transmits the entire NZP-SRS (does not puncture the NZP-SRS).

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

<< Embodiment 6-2 >>
When ZP-SRS and NZP-SRS are duplicated, the UE is in the RE that overlaps with the resource set for ZP-SRS (including the RE not set for ZP-SRS and the RE where NZP-SRS is not placed). , NZP-SRS need not be transmitted.

For example, as shown in FIG. 20B, when the ZP-SRS resource overlaps with the NZP-SRS resource, the UE sets the resource that overlaps with the resource (ZP-SRS resource range) set for ZP-SRS to NZP-SRS. Not used for transmission (NZP-SRS is punctured in RE that overlaps with the resource set for ZP-SRS).

ZP-SRS resources (including Combs and REs that are not used to be configured for ZP-SRS) may be used by other UEs as resources for SRS and UL channels. By using the 6-2 embodiment, even if the ZP-SRS resource is used by another UE, it is possible to prevent the NZP-SRS of the UE from colliding or interfering with the SRS and UL channels of the other UE. Can be done.

<< Embodiment 6-3 >>
When ZP-SRS and NZP-SRS overlap, the UE does not have to transmit NZP-SRS in the symbol of ZP-SRS.

For example, as shown in FIG. 20C, when the ZP-SRS resource overlaps with the NZP-SRS resource, the UE does not transmit the NZP-SRS at the symbol in which the ZP-SRS resource is set (NZP-SRS). Drop).

In this case, in the ZP-SRS symbol of a certain UE, another SRS having a different length (series length, bandwidth) may be transmitted by another UE. By not mapping the UL transmission of the UE to the ZP-SRS symbol, it is possible to avoid collision or interference with SRS having different lengths (series length, bandwidth) of other UEs.

<< Embodiment 6-4 >>
When the NZP-SRS frequency hopping, if at least a part of the ZP-SRS resource and the NZP-SRS resource overlap, the UE does not have to transmit the NZP-SRS in the slot.

For example, as shown in FIG. 21, when the ZP-SRS resource and the NZP-SRS resource overlap, the UE does not transmit all the NZP-SRS in the slot (drops the NZP-SRS). ).

When NZP-SRS frequency hopping, NZP-SRS needs to be transmitted with multiple symbols. Therefore, not transmitting some symbols of NZP-SRS over a plurality of symbols cannot serve the purpose of transmitting NZP-SRS. When different spatial relationships are applied to multiple symbols in the multi-symbol SRS, it may be meaningless to partially transmit the NZP-SRS. When the embodiment 6-4 is used, the power consumption of the UE can be suppressed by not transmitting all the NZP-SRS in the plurality of symbols.

<Embodiment 7>
It may be assumed that the UE is set with a ZP-SRS resource including a portion in which the UL channel resource set for the UE and the SRS resource set for the other UE overlap. The UE may assume that the SRS from the other UE is transmitted in the portion where the UL channel resource set for the UE and the SRS resource set for the other UE overlap. .. When a UE sets a ZP-SRS resource, even if it is assumed that at least a part of the UL channel resource set for the UE and the SRS resource set for another UE overlap. Good.

If at least a part of the UL channel resource of UE # 1 and the SRS resource of UE # 2 overlap, the network (for example, a base station) may set the ZP-SRS resource for UE # 1. Good.

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 in UE # 1. Will be done.

In this case, the network may notify the UE regarding the ZP-SRS setting. Notification by the network may be performed by higher layer signaling. By assuming this way, the UL channel resources of the UE can be effectively rate-matched in the SRS resources of other UEs.

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

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

Further, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technology (RAT) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E). -UTRA Dual Connectivity (NE-DC)) may be included.

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

The wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.

The wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare. The user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure. Hereinafter, when the

base stations

11 and 12 are not distinguished, they are collectively referred to as the base station 10.

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

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

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

The plurality of base stations 10 may be connected by wire (for example, an optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between

base stations

11 and 12, the base station 11 corresponding to the higher-level station is the Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is the IAB. It may be called a node.

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

The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

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

The wireless access method may be called a waveform. In the wireless communication system 1, another wireless access system (for example, another single carrier transmission system, another multi-carrier transmission system) may be used as the UL and DL wireless access systems.

In the wireless communication system 1, as downlink channels, downlink shared channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), and downlink control channels (Physical Downlink Control) shared by each user terminal 20 are used. Channel (PDCCH)) and the like may be used.

Further, in the wireless communication system 1, as the uplink channel, the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), and the random access channel shared by each user terminal 20 are used. (Physical Random Access Channel (PRACH)) or the like may be used.

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

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

The DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. The PDSCH may be read as DL data, and the PUSCH may be read as UL data.

A control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used for detecting PDCCH. CORESET corresponds to a resource that searches for DCI. The search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates). One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. The "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. of the present disclosure may be read as each other.

Depending on the PUCCH, channel state information (Channel State Information (CSI)), delivery confirmation information (for example, may be called Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), ACK / NACK, etc.) and scheduling request (Scheduling Request () Uplink Control Information (UCI) including at least one of SR)) may be transmitted. The PRACH may transmit a random access preamble for establishing a connection with the cell.

In this disclosure, downlinks, uplinks, etc. may be expressed without "links". Further, it may be expressed without adding "Physical" at the beginning of various channels.

In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted. In the wireless communication system 1, the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation). Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.

The synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). The signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like. In addition, SS, SSB and the like may also be called a reference signal.

Further, in the wireless communication system 1, even if a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), or the like is transmitted as an uplink reference signal (Uplink Reference Signal (UL-RS)). Good. The DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal).

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

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

The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.

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

The transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitter / receiver 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure. be able to.

The transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

The transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.

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

The transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

The transmission / reception unit 120 (transmission processing unit 1211) processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110. RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

The transmission / reception unit 120 (transmission processing unit 1211) performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted. The base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog conversion, and other transmission processing.

The transmission / reception unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..

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

The transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.

The transmission / reception unit 120 (measurement unit 123) may perform measurement on the received signal. For example, the measuring unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal. The measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)). , Signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like may be measured. The measurement result may be output to the control unit 110.

The transmission line interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.

The transmitting unit and the receiving unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.

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

Note that this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.

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

The transmission / reception unit 220 may include a baseband unit 221 and an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitter / receiver 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.

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

The transmitting / receiving antenna 230 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.

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

The transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

The transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.

Whether or not to apply the DFT process may be based on the transform precoding setting. The transmission / reception unit 220 (transmission processing unit 2211) described above for transmitting a channel (for example, PUSCH) using the DFT-s-OFDM waveform when the transform precoding is enabled. The DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.

The transmission / reception unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. to the radio frequency band on the baseband signal, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..

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

The transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.

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

The transmitter and receiver of the user terminal 20 in the present disclosure may be composed of at least one of the transmitter / receiver 220 and the transmitter / receiver antenna 230.

The transmission / reception unit 220 may transmit at least one of the uplink (UL) channel transmission and the SRS transmission. When the first resource (for example, UL channel resource) given to the uplink and the second resource (for example, SRS resource) given to the SRS overlap, the control unit 210 of the uplink channel and the SRS The resource to which at least one is mapped may be reduced (at least one of the uplink and the SRS may be dropped, rate matched, or punctured).

The control unit 210 may map the uplink channel to all of the first resources without mapping the SRS to at least a part of the second resource (drop or puncture the SRS and the uplink). The entire channel may be transmitted) (Embodiment 1).

The control unit 210 may map the SRS to all of the second resource without mapping the uplink to at least a part of the first resource (drop, puncture, or rate the uplink). It may match and transmit all of the SRS) (Embodiment 2).

When the first resource and the second resource overlap and a third resource for retransmission of the uplink channel (for example, a UL channel resource) is given, the control unit 210 controls another SRS of the third resource. A portion (embodiment 3-1) that does not overlap with the resource (for example, SRS resource) given to the third resource and a fourth resource (embodiment 3-2) having the same arrangement as the initial transmission of the uplink channel among the third resources. And the portion of the fourth resource that does not overlap with the resource given to another SRS (Embodiment 3-3), the retransmission may be mapped to any of (Embodiment 3).

The control unit 210 allocates resources that do not overlap with the resources given to the SRS in each of the plurality of slots (for example, the plurality of slots used for the multi-slot UL channel), and is given to the SRS in the first slot of the plurality of slots. Even if the uplink channel in each of the plurality of slots is mapped to either the same arrangement as the resource that does not overlap with the resource or the arrangement of the resource that does not overlap with the resource given to the SRS in any of the plurality of slots. Good (Embodiment 4).

The transmission / reception unit 220 has setting information (for example, SRS setting information, SRS resource set setting information, SRS resource setting information, ZP-SRS) indicating the first resource of the zero power sounding reference signal (SRS) (for example, ZP-SRS). Setting information, ZP-SRS resource set setting information, ZP-SRS resource setting information, etc.) may be received (Embodiment 5). When the second resource given to the uplink transmission and the first resource overlap, the control unit 210 does not have to map the uplink transmission to at least a part of the second resource (Embodiment 5). ..

The setting information may indicate that the usage of the first resource (for example, an SRS resource set including the first resource) is zero power (Embodiment 5).

The first resource may have a Comb configuration (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) whose power is not zero (Embodiment 6).

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

Here, the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like. As described above, the method of realizing each of them is not particularly limited.

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

In this disclosure, the terms of devices, circuits, devices, sections, units, etc. can be read as each other. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is shown, there may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors. The processor 1001 may be mounted by one or more chips.

For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

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

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

The memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of. The storage 1003 may be referred to as an auxiliary storage device.

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

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that 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, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

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

Further, the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Modification example)
The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols and signals (signals or signaling) may be read interchangeably. Also, the signal may be a message. The reference signal can also be abbreviated as RS, and may be called a pilot, a pilot signal, or the like depending on the applied standard. Further, the component carrier (Component Carrier (CC)) may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

The wireless frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe. Further, the subframe may be composed of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.

Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel. The numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration. , A specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.

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

The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be called a sub slot. A minislot may consist of a smaller number of symbols than the slot. A PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.

The wireless frame, subframe, slot, mini slot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each. The time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.

For example, one subframe may be called TTI, a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

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

The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

A resource block (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 in the frequency domain. The number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.

Further, the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

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

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

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

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.

The names used for parameters, etc. in this disclosure are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting in any way. ..

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

In addition, information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers. Information, signals, etc. may be input / output via a plurality of network nodes.

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

The notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method. For example, the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), etc.), medium access control (MAC) signaling), other signals or combinations thereof May be carried out by.

Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Further, the RRC signaling may be called 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. Further, MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).

In addition, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).

The determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).

Software is an instruction, instruction set, code, code segment, program code, program, subprogram, software module, whether called software, firmware, middleware, microcode, hardware description language, or another name. , Applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, features, etc. should be broadly interpreted.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twist pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The terms "system" and "network" used in this disclosure may be used interchangeably. "Network" may mean a device (eg, a base station) included in the network.

In the present disclosure, "precoding", "precoder", "weight (precoding weight)", "pseudo-colocation (Quasi-Co-Location (QCL))", "Transmission Configuration Indication state (TCI state)", "space". "Spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel" are compatible. Can be used for

In the present disclosure, "base station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission point (Transmission Point (TP))", "Reception point (Reception Point (RP))", "Transmission / reception point (Transmission / Reception Point (TRP))", "Panel" , "Cell", "sector", "cell group", "carrier", "component carrier" and the like can be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)). Communication services can also be provided by Head (RRH))). The term "cell" or "sector" refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.

In this disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" are used interchangeably. Can be done.

Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during 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.

Further, the base station in the present disclosure may be read by the user terminal. For example, communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the user terminal 20 may have the function of the base station 10 described above. In addition, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the uplink, downlink, and the like may be read as side channels.

Similarly, the user terminal in the present disclosure may be read as 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 may be performed by its upper node (upper node) in some cases. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,). Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.

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

Each aspect / embodiment described in the present disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802. 20, Ultra-WideBand (UWB), Bluetooth®, other systems that utilize suitable wireless communication methods, next-generation systems extended based on these, and the like. In addition, a plurality of systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

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

Any reference to elements using designations such as "first", "second", etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.

The term "determining" used in this disclosure may include a wide variety of actions. For example, "judgment (decision)" means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment".

In addition, "judgment (decision)" means receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), access (for example). It may be regarded as "judgment (decision)" of "accessing" (for example, accessing data in memory).

In addition, "judgment (decision)" is regarded as "judgment (decision)" of solving, selecting, choosing, establishing, comparing, and the like. May be good. That is, "judgment (decision)" may be regarded as "judgment (decision)" of some action.

In addition, "judgment (decision)" may be read as "assuming", "expecting", "considering", and the like.

The terms "connected", "coupled", or any variation thereof, as used herein, are any direct or indirect connection or connection between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are "connected" or "joined" to each other. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access".

In the present disclosure, when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-comprehensive examples, the radio frequency domain, microwaves. It can be considered to be "connected" or "coupled" to each other using frequency, electromagnetic energy having wavelengths in the light (both visible and invisible) regions, and the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Furthermore, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include that the nouns following these articles are in the plural.

Although the invention according to the present disclosure has been described in detail above, it is clear 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 a modified or modified mode without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for purposes of illustration and does not bring any limiting meaning to the invention according to the present disclosure.

Claims

A receiver that receives setting information indicating the first resource of the zero-power sounding reference signal (SRS), and a receiver.
A terminal having a control unit that does not map the uplink transmission to at least a part of the second resource when the second resource given to the uplink transmission and the first resource overlap.
The terminal according to claim 1, wherein the setting information indicates that the use of the first resource is zero power.
The terminal according to claim 1 or 2, wherein the first resource has a Comb configuration.
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.
The terminal according to any one of claims 1 to 4, wherein the uplink transmission is an SRS whose power is not zero.
The step of receiving the setting information indicating the first resource of the zero power sounding reference signal (SRS), and
A method of wireless communication of a terminal having a step of not mapping the uplink transmission to at least a part of the second resource when the second resource given to the uplink transmission and the first resource overlap.