阅读说明：本技术 用户终端以及无线通信方法 (User terminal and wireless communication method ) 是由 武田一树 永田聪 王理惠 于 2020-01-16 设计创作，主要内容包括：本公开的一方式所涉及的用户终端具有：接收单元,接收用于表示调度请求(SR)设定以及服务的关联的设定信息；以及控制单元,在与第一服务对应的SR的第一时间资源、和与第二服务对应的上行链路发送的第二时间资源冲突的情况下,基于所述设定信息,进行所述SR以及所述上行链路发送中的至少一个的发送。(A user terminal according to an aspect of the present disclosure includes: a reception unit that receives setting information indicating a Scheduling Request (SR) setting and a service association; and a control unit configured to perform, when a first time resource of an SR corresponding to a first service and a second time resource of an uplink transmission corresponding to a second service conflict with each other, transmission of at least one of the SR and the uplink transmission based on the setting information.)

1. A user terminal, comprising:

a reception unit that receives setting information indicating a Scheduling Request (SR) setting and a service association; and

and a control unit configured to, when a first time resource of the SR corresponding to a first service and a second time resource of the uplink transmission corresponding to a second service conflict with each other, perform transmission of at least one of the SR and the uplink transmission based on the setting information.

2. The user terminal of claim 1,

in a case where the first time resource and the second time resource collide and the second service has priority over the first service, the control unit delays the SR and indicates information on not transmitting the SR in the first time resource from a physical layer to a Medium Access Control (MAC) layer.

3. The user terminal of claim 1,

the control unit transmits the SR in the first time resource of a first carrier and the uplink transmission in the second time resource of a second carrier in a case where the first time resource and the second time resource of the SR collide and the second service has priority over the first service,

the control unit adjusts the transmission power of the SR when the transmission power of the user terminal is limited.

4. The user terminal of claim 1,

the control unit transmits the SR in a first carrier and the uplink transmission is performed in the second time resource of a second carrier in a case where the first time resource and the second time resource of the SR collide and the second service has priority over the first service,

the control unit defers the SR and indicates information on dropping of the SR from a physical layer to a Medium Access Control (MAC) layer in a case where transmission power of the user terminal is limited.

5. The user terminal of claim 1,

when the first time resource and the second time resource collide and the second service has priority over the first service, the control unit does not transmit the SR, performs the uplink transmission in the second time resource, and receives downlink control information for scheduling corresponding to the first service.

6. A wireless communication method of a user terminal, comprising:

receiving configuration information indicating a Scheduling Request (SR) configuration and a service association; and

and a step of transmitting at least one of a Scheduling Request (SR) corresponding to a first service and an uplink transmission corresponding to a second service based on the setting information when a first time resource of the SR and a second time resource of the uplink transmission conflict with each other.

Technical Field

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

Background

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

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

In an existing LTE system (e.g., LTE rel.8-14), a User terminal (User Equipment (UE)) controls transmission of an Uplink Shared Channel (PUSCH) based on Downlink Control Information (DCI)).

Documents of the prior art

Non-patent document

Non-patent document 13 GPP TS 36.300V8.12.0 "Evolved Universal Radio Access (E-UTRA) and Evolved Universal Radio Access Network (E-UTRAN); (ii) an Overall description; stage 2(Release 8) ", 4 months 2010

Disclosure of Invention

Problems to be solved by the invention

In future wireless Communication systems (e.g., 5G, NR, etc.), it is assumed that a plurality of services (also referred to as use cases, Communication types, etc.) having different Communication requirements (requirements) such as high speed and large capacity (e.g., enhanced Mobile broadband (eMBB)), Ultra-multi terminals (e.g., large Machine Type Communication (mtc), Internet of Things (IoT)), Ultra-high reliability and Low Latency (e.g., Ultra-Reliable and Low Latency Communication (URLLC)), and the like exist at the same time.

However, there is a concern that a plurality of uplink transmissions corresponding to different services collide.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a user terminal and a wireless communication method that appropriately cope with collisions of a plurality of uplink transmissions corresponding to different services.

Means for solving the problems

A user terminal according to an aspect of the present disclosure includes: a reception unit that receives setting information indicating a Scheduling Request (SR) setting and a service association; and a control unit configured to perform, when a first time resource of an SR corresponding to a first service and a second time resource of an uplink transmission corresponding to a second service conflict with each other, transmission of at least one of the SR and the uplink transmission based on the setting information.

Effects of the invention

According to an aspect of the present disclosure, it is possible to appropriately handle collisions of a plurality of uplink transmissions corresponding to different services.

Drawings

Fig. 1 is a diagram illustrating an example of UE operation according to embodiment 2-1.

Fig. 2 is a diagram illustrating an example of UE operation according to embodiment 2-2.

Fig. 3 is a diagram illustrating an example of power adjustment according to embodiment 2-2.

Fig. 4 is a diagram illustrating an example of UE operation according to embodiments 2 to 3.

Fig. 5 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment.

Fig. 6 is a diagram showing an example of a functional configuration of a base station according to an embodiment.

Fig. 7 is a diagram showing an example of a functional configuration of a user terminal according to an embodiment.

Fig. 8 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment.

Detailed Description

In future wireless communication systems (e.g., LTE rel.15 to 5G, NR), transmission of UCI using an uplink control channel (e.g., PUCCH) of a plurality of formats (e.g., NR PUCCH format (NR PF), which is also simply referred to as PUCCH format) that differ at least for a certain period is being studied.

PUCCH format 0 is a 2-bit or less (up to 2bits) short PUCCH for UCI, and is also referred to as sequence-based (sequence-based) short PUCCH or the like. The short PUCCH transmits (covey) UCI (e.g., including at least one of HARQ-ACK and Scheduling Request) of 2bits or less in 1 or 2 symbols.

PUCCH format 1 is a long PUCCH for UCI of 2bits or less. The long PUCCH transmits UCI (including at least one of HARQ-ACK and SR) of 2bits or less in 4 to 14 symbols. In PUCCH format 1, a plurality of user terminals may also be Code Division Multiplexed (CDM) within the same PRB by block-spreading (block-spreading) of a time domain (time-domain) using, for example, Cyclic Shift (CS) and/or Orthogonal spreading Code (OCC).

In NR, a UE is assumed to perform a plurality of Communications associated with a plurality of services having different communication requirements (for example, Ultra Reliable and Low Latency Communications (URLLC)) and enhanced Mobile broadband (eMBB)).

For example, one can consider: the UE supports both a service of a first service (e.g., eMBB) and a second service (e.g., URLLC) requiring communication with at least one of reliability and delay stricter than the first service, and the services of both services occur independently in the UE.

It is possible to consider: in case that a Scheduling Request (SR) of a first service and UL transmission (PUSCH, PUCCH, etc.) of a second service collide, the UE discards the SR of the first service. If the UE discards the SR, the SR counter is increased.

The SR COUNTER (SR _ COUNTER) is the number of SR transmission times managed by a MAC (Medium Access Control) entity of the UE. When the SR counter is equal to or greater than a specific threshold, the UE releases a Sounding Reference Signal (SRs) for measurement of the PUCCH in the serving cell, or the UE initiates a random access procedure.

If the UE continuously discards the SR of the first service, the SR counter of the first service becomes above (is checked to) a certain threshold, and the UE performs a random access procedure. This random access procedure is not desirable, and there is a concern that the performance of the system will be degraded due to the occurrence of the random access procedure.

In rel.15, the UE omits SR when SR and PUSCH transmissions collide, and multiplexes SR to Uplink Control Information (UCI) on PUCCH when SR and PUCCH transmissions collide. In rel.15, the UE does not perform UL transmission independently for each service, and therefore such a problem does not occur.

Therefore, the inventors of the present invention and the like conceived the operation of the UE in the case where SR and UL transmissions of different services collide.

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

Services, traffic types, communication requirements may also be interchanged in this disclosure. In this disclosure, dropping, puncturing, cancelling, deferring, shifting of time resources, not incrementing the SR counter may also be interchanged.

In the present disclosure, Carrier Aggregation (CA), Dual Connectivity (DC), Multiple Connectivity (MC) may also be interchanged. Carriers, Component Carriers (CCs), cells may also be interchanged.

The service (traffic type) is not necessarily identified in a lower layer (lower layer) (e.g., physical layer), and may be identified by other parameters. For example, the service difference may also be identified by at least one of the following parameters.

Multiple logical channels (e.g., Uplink Shared Channel (UL-SCH)) having different priorities

Tables (e.g., MCS index table) different in setting value with respect to Modulation and Coding Scheme (MCS)

Multiple formats (DCI formats) to which DCI is different

A plurality of different Radio Network Temporary Identifiers (RNTIs) (e.g., a first RNTI (Cell-RNTI: C-RNTI) and a second RNTI (MCS-C-RNTI)) used for scrambling the CRC of the DCI

Values represented by higher layer parameters

Multiple search spaces

Multiple values represented by a particular field (e.g., new field or existing field) within the DCI

The scrambling of the CRC means that Cyclic Redundancy Check (CRC) bits included in (attached to) the DCI are scrambled (masked) with specific information (e.g., RNTI).

The priority of the service is high, the parameters of the communication requirement are strict, and the like can be interchanged. The second service is prioritized over the first service, which may also mean that the priority of the second service is higher than the priority of the first service, or that the communication requirement of the second service is higher than the communication requirement of the first service.

In the present disclosure, the UL transmission may also be PUSCH, PUCCH, or the like. The PUSCH may include at least one of a PUSCH scheduled by DCI (UL grant) and a PUSCH set by a higher layer parameter (configured grant).

In the present disclosure, time resources, slots, mini-slots, symbols may also be interchanged.

In the present disclosure, the power-limited state (in power-limited) means a state in which the maximum transmission power is reached from the viewpoint of at least any one of the serving cell, a Timing Advance Group (TAG), a cell Group, or the UE in the Timing of the attempt of transmission by the user terminal. For example, the power-limited state is a state in which the transmission power of the uplink signal is limited due to a request for transmission of the uplink signal exceeding the maximum transmission power allowed for the user terminal. That is, the sum of the required transmission power for the uplink signal of the Master base station (Master Cell Group: MCG) and the uplink signal of the slave base station (slave Cell Group: SCG) exceeds the allowable maximum transmission power of the user terminal. Here, the required transmission power (also referred to as desired power, desired transmission power, or the like) includes the requested power (required transmission power) notified from the base station and the transmission power increased by applying power ramping based on the requested power.

The case where the UE is in the power-limited state may be replaced with the case where the power-limited state of the UE is detected (determined). The total transmission power may be the sum of the transmission powers of all serving cells (CCs). May be replaced with the maximum transmission power allowed, total transmission power allowed (PCMAX, P)_CMAXAnd the like. The UE may also be set to the maximum allowed transmit power by higher layer signaling. The adjustment of power (scale) may also be replaced by scaling, power scaling, etc.

In the present disclosure, the SR opportunity (occast) may be replaced with an SR transmission opportunity, an SR transmission period, and an SR time resource. The UE may also be set with multiple SR occasions through higher layer signaling.

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

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

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

(Wireless communication method)

< embodiment 1>

The UE may also support SR settings (configuration) and association between services. The UE may also be configured with configuration information indicating the association through Radio Resource Control (RRC) signaling (RRC information element). Each service may also have an index. For example, the SR setting set by RRC signaling may include an index of the corresponding service.

The UE may perform processing for the SR based on the priority of the service by setting SR settings and association between services.

For example, when SR of a first service (one service) (corresponding to the first service) and UL transmission of a second service (another service) (corresponding to the second service) collide, and the second service has priority over the first service, the UE may perform embodiment 2 described later based on the setting information.

According to embodiment 1 above, the UE performs the SR processing based on the priority of the service, thereby avoiding an increase in the SR counter and avoiding an unnecessary random access procedure.

< embodiment 2>

In the case where the SR of the first service collides with the UL transmission of the second service, and the second service has priority over the first service, the UE may operate according to any one of embodiments 2-1 to 2-3 below.

< embodiment mode 2-1>

In the case where the SR of the first service collides with the UL transmission of the second service and the second service has priority over the first service, the UE may defer the SR of the first service to the next SR opportunity according to the SR setting and transmit an instruction (notification) related to the discard of the SR to the MAC layer. The MAC layer may not increment the SR counter according to the instruction. This instruction may also be referred to as SR suspension (SR suspension), SR transmission suspension (SR transmission cancellation), or the like.

For example, as shown in fig. 1, when a first time resource of an SR of a first service (eMBB) and a second time resource of UL transmission of a second service (URLLC) collide and the second service has priority over the first service, the UE may defer the SR of the first service to a next SR opportunity (from SR opportunity #1 to SR opportunity #2) and transmit an instruction (notification) regarding the discard of the SR from the physical layer to the MAC layer, in accordance with the SR setting. The UE may also perform UL transmission for the second service in the second time resource.

< embodiment mode 2-2>

In CA, a UE may also transmit a first service SR on a first carrier (1 carrier) and a second service UL transmission on a second carrier (another carrier) when the SR and UL transmissions collide.

As shown in fig. 2, in CA using a first carrier (CC #1) and a second carrier (CC #2), when a first time resource of an SR of a first service (eMBB) on the first carrier and a second time resource of UL transmission of a second service (URLLC) on the second carrier collide, a UE may also transmit the SR in the first time resource of the first carrier and the UL transmission in the second time resource of the second carrier.

The UE may also adjust (scale) the transmit power of the SR in case the UE is in a power limited state and the second service is prioritized over the first service, so that the total transmit power of the UE does not exceed the allowed maximum transmit power (e.g., PCMAX). For example, as shown in fig. 3, the transmission power of the SR may be reduced until the total transmission power of the UE becomes equal to or lower than the allowable maximum transmission power.

< embodiment modes 2 to 3>

In CA, when the SR of the first service on the first carrier collides with the UL transmission of the second service of the second carrier information, the UE may transmit the SR and the UL transmission.

In CA using a first carrier (CC #1) and a second carrier (CC #2), when a first time resource of an SR of a first service (eMBB) on the first carrier and a second time resource of UL transmission of a second service (URLLC) on the second carrier collide, the UE may also transmit the SR in the first time resource of the first carrier and the UL transmission in the second time resource of the second carrier.

The UE may also transmit the SR in the first time resource of the first carrier and the UL transmission in the second time resource of the second carrier when the first time resource and the second time resource collide and the UE is not in a power limited state.

As shown in fig. 4, when the first time resource and the second time resource collide with each other, the UE is in a power-limited state, and the second service is prioritized over the first service, the UE may defer the SR of the first service to the next SR opportunity (from SR opportunity #1 to SR opportunity #2) according to the SR setting, and the physical layer of the UE may transmit an instruction regarding the discard of the SR to the MAC layer. The MAC layer may not increment the SR counter according to the instruction. This instruction may also be referred to as SR suspension (SR suspension), SR transmission suspension (SR transmission cancellation), or the like.

The UE may also adjust the transmit power of the SR such that the total transmit power of the UE does not exceed the allowed maximum transmit power. For example, the UE may decrease the transmission power of the SR until the total transmission power becomes equal to or lower than the allowable maximum transmission power.

According to embodiment 2 described above, the UE transmits the SR corresponding to the first service and the UL transmission corresponding to the second service in different time resources or different frequency resources, thereby being able to appropriately cope with collisions. In addition, by indicating to the MAC layer or transmitting the SR, it is possible to avoid an increase in the SR counter and avoid an unnecessary random access procedure. Further, the total transmission power can be appropriately controlled even in the simultaneous transmission of SR and UL transmission.

< embodiment 3>

In the case where the SR of the first service and the UL transmission of the second service collide and the second service has priority over the first service, the UE may transmit the UL transmission without transmitting the SR.

When the base station knows that there is a collision of resources between the SR and the UL transmission and detects the UL transmission, the base station may also transmit UL grant (e.g., DCI for scheduling PUSCH, DCI format 0_0, 0_1) for scheduling UL data transmission (e.g., PUSCH) of the first service.

When the UE is set to UL skip (UL skip) and does not have UL data of the first service, the UE can skip UL data transmission of the first service even if it receives an UL grant. The UE may also be set to UL skip by higher layer signaling.

When the UE is not configured with UL skip, the UE may transmit UL data of the first service based on the UL grant. When the UE does not have UL skip set and does not have UL data for the first service, the UE may transmit UL data without actual data corresponding to the first service based on the UL grant.

For example, the UL grant may also be a DCI that schedules (triggers) Aperiodic Channel State Information (A-CSI) only.

According to embodiment 3 above, the base station can transmit the UL grant without receiving the SR by knowing the collision between the SR of the first service and the UL transmission of the second service, and thus can suppress the overhead of signaling.

(Wireless communication System)

Hereinafter, a configuration of a radio communication system according to an 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 embodiments of the present disclosure or a combination thereof.

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

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

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

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

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

The user terminal 20 may also be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of Carrier Aggregation (CA) and Dual Connectivity (DC) using a plurality of Component Carriers (CCs)).

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

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

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

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

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

In the wireless communication system 1, a radio access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used for at least one of the downlink (dl) and the uplink (ul).

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

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

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

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

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

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

For PDCCH detection, a COntrol REsource SET (countrol REsource SET (CORESET)) and a search space (search space) may also be utilized. CORESET corresponds to the resource that searches for DCI. The search space corresponds to a search region and a search method of PDCCH candidates (PDCCH candidates). A CORESET may also be associated with one or more search spaces. The UE may also monitor the CORESET associated with a search space based on the search space settings.

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

Uplink Control Information (UCI) including at least 1 of Channel State Information (CSI), transmission acknowledgement Information (for example, Hybrid Automatic Repeat reQuest (HARQ-ACK)), ACK/NACK, and Scheduling ReQuest (SR)) may also be transmitted through the PUCCH. Through the PRACH, a random access preamble for connection establishment with the cell may also be transmitted.

In the present disclosure, downlink, uplink, and the like may be expressed without being given "link". Note that the beginning of each channel may be expressed without giving "Physical (Physical)" thereto.

In the wireless communication system 1, a Synchronization Signal (SS), a Downlink Reference Signal (DL-RS), and the like may be transmitted. In the wireless communication system 1, a Cell-specific Reference Signal (CRS), a Channel State Information Reference Signal (CSI-RS), a DeModulation Reference Signal (DMRS), a Positioning Reference Signal (PRS), a Phase Tracking Reference Signal (PTRS), and the like may be transmitted as DL-RSs.

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

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

(base station)

Fig. 6 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission/reception unit 120, a transmission/reception antenna 130, and a transmission line interface (transmission line interface) 140. The control unit 110, the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission line interface 140 may be provided in one or more numbers.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but it is also conceivable that the base station 10 further has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

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

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

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

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

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

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

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

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

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

The transmission/reception section 120(RF section 122) may perform modulation, filtering, amplification, and the like of a radio frequency band on a baseband signal, and transmit the signal of the radio frequency band via the transmission/reception antenna 130.

On the other hand, the transmission/reception section 120(RF section 122) performs amplification, filtering, demodulation of a baseband signal, and the like on a signal of a radio frequency band received by the transmission/reception antenna 130.

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

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

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

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

Further, transmission/reception section 120 may transmit a reference signal (e.g., SSB, CSI-RS, etc.). The transmission/reception unit 120 may also transmit information (MAC CE or DCI) indicating the TCI status for a specific DL channel.

(user terminal)

Fig. 7 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission/reception unit 220, and a transmission/reception antenna 230. Further, the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided with one or more antennas.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but it is also conceivable that the user terminal 20 further has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

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

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

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

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

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

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

Transmission/reception section 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

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

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

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

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

On the other hand, the transmission/reception section 220(RF section 222) may amplify, filter, demodulate a baseband signal, or the like, with respect to a signal of a radio frequency band received by the transmission/reception antenna 230.

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

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

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

Furthermore, transmission/reception section 220 may receive setting information (e.g., higher layer parameters and RRC information elements) indicating the association of Scheduling Request (SR) setting and service (traffic type and communication request). When a first time resource of the SR corresponding to the first service and a second time resource of the uplink transmission (for example, PUCCH or PUSCH) corresponding to the second service collide with each other, control section 210 may perform transmission of at least one of the SR and the uplink transmission based on the setting information.

Further, when the first time resource and the second time resource collide and the second service has priority over the first service, the control unit 210 may defer the SR and indicate information on not transmitting the SR in the first time resource from a physical layer to a Medium Access Control (MAC) layer (embodiment 2-1).

Further, when the first time resource and the second time resource of the SR collide and the second service has priority over the first service, the control unit 210 may transmit the SR in the first time resource of a first carrier, perform the uplink transmission in the second time resource of a second carrier, and adjust the transmission power of the SR when the transmission power of the user terminal is limited (embodiment 2-2).

Further, when the first time resource and the second time resource of the SR collide and the second service has priority over the first service, the control unit 210 may transmit the SR in a first carrier, perform the uplink transmission in the second time resource of a second carrier, and when the transmission power of the user terminal is limited, the control unit 210 may delay the SR and instruct a physical layer to a Medium Access Control (MAC) layer not to transmit the SR in the first time resource (embodiment 2-3).

Further, when the first time resource and the second time resource collide and the second service has priority over the first service, the control unit 210 may perform the uplink transmission in the second time resource without transmitting the SR and may receive downlink control information for scheduling corresponding to the first service (embodiment 3).

(hardware construction)

The block diagrams used in the description of the above embodiments represent blocks in functional units. These functional blocks (structural units) are realized by any combination of at least one of hardware and software. The method of implementing each functional block is not particularly limited. That is, each functional block may be implemented by 1 device that is physically or logically combined, or may be implemented by a plurality of devices that are directly and/or indirectly (for example, by wire, wireless, or the like) connected to two or more devices that are physically or logically separated. The functional blocks may also be implemented by software in combination with the above-described 1 device or the above-described devices.

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

For example, a base station, a user terminal, or the like in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 8 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. The base station 10 and the user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In addition, in the present disclosure, words such as a device, a circuit, an apparatus, a section (section), and a unit can be mutually replaced. The hardware configuration of the base station 10 and the user terminal 20 may include 1 or more of each illustrated device, or may be configured without including some devices.

For example, only 1 processor 1001 is shown, but there may be multiple processors. The processing may be executed by 1 processor, or the processing may be executed by 2 or more processors simultaneously, sequentially, or by using another method. The processor 1001 may be implemented by 1 or more chips.

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

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

The processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes based on the program (program code), the software module, the data, and the like. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 110(210) may be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and may be similarly implemented with respect to other functional blocks.

The Memory 1002 is a computer-readable recording medium, and may be constituted by at least 1 of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (primary storage), or the like. The memory 1002 can store executable programs (program codes), software modules, and the like for implementing the wireless communication method of an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, and may be configured of at least 1 of a flexible disk, a floppy (registered trademark) disk, an optical magnetic disk (e.g., a Compact Disc ROM (CD-ROM) or the like), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or another suitable storage medium, for example. The storage 1003 may also be referred to as a secondary storage device.

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

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

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

The base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), and a Field Programmable Gate Array (FPGA), and some or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may be implemented with at least 1 of these hardware.

(modification example)

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

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

Here, the parameter set may also refer to a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The parameter set may indicate, for example, at least 1 of SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the Time domain, and the like.

The slot may be formed of 1 or more symbols in the time domain (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, or the like). Further, the time slot may be a time unit based on the parameter set.

A slot may comprise a plurality of mini-slots (mini-slots). Each mini-slot may be composed of 1 or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be made up of fewer symbols than the number of slots. PDSCH (or PUSCH) transmitted in a time unit greater than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type a. PDSCH (or PUSCH) transmitted with mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

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

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

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

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

In addition, in a case where 1 slot or 1 mini-slot is referred to as a TTI, 1 or more TTIs (i.e., 1 or more slots or 1 or more mini-slots) may be the minimum time unit for scheduling. Further, the number of slots (mini-slot number) constituting the minimum time unit of the schedule may be controlled.

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

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

A Resource Block (RB) is a Resource allocation unit in the time domain and the frequency domain, and may include 1 or a plurality of consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, and may be, for example, 12 subcarriers. The number of subcarriers included in the RB may also be decided based on the parameter set.

In addition, an RB may include 1 or more symbols in the time domain, and may have a length of 1 slot, 1 mini-slot, 1 subframe, or 1 TTI. Each of the 1 TTI and 1 subframe may be formed of 1 or more resource blocks.

In addition, 1 or more RBs may also be referred to as Physical Resource Blocks (PRBs), subcarrier groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, and the like.

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

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

The BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). It is also possible to set 1 or more BWPs for the UE within 1 carrier.

At least 1 of the provisioned BWPs may also be active, the UE may not also assume: a specific signal/channel is transmitted and received outside the active BWP. In addition, "cell", "carrier", and the like in the present disclosure may also be replaced with "BWP".

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

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

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

Information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

Further, information, signals, and the like may be output to at least one of: from the upper level to the lower level and from the lower level to the upper level. Information, signals, and the like may be input and output via a plurality of network nodes.

The information, signals, and the like to be input and output may be stored in a specific area (for example, a memory) or may be managed by a management table. Information, signals, etc. that are input and output may also be overwritten, updated, or added. The information, signals, etc. that are output may also be deleted. The input information, signal, and the like may be transmitted to other devices.

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

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

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

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

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, is intended to be broadly interpreted as representing instructions, instruction sets, code segments, program code, programs, subroutines, software modules, applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

Further, software, instructions, information, etc. may be transmitted or received via a transmission medium. For example, in a case where software is transmitted from a website, a server, or another remote source using at least one of a wired technology (coaxial cable, optical cable, twisted pair, Digital Subscriber Line (DSL)), or the like) and a wireless technology (infrared ray, microwave, or the like), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

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

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

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

A base station can accommodate 1 or more (e.g., 3) cells. In the case where a base station accommodates a plurality of cells, the coverage area of the base station as a whole can be divided into a plurality of smaller areas, and each smaller area can also provide a communication service through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))), "cell" or "sector", or other terms, refer to a part or all of the coverage area of at least one of the base station and the base station subsystem that performs a communication service in the coverage area.

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

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

At least one of the base station and the mobile station may be referred to as a transmitting apparatus, a receiving apparatus, a wireless communication apparatus, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., an unmanned aerial vehicle, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be replaced by a user terminal. For example, the embodiments and implementation modes of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may also be referred to as Device-to-Device (D2D)), Vehicle networking (V2X), and the like). In this case, the user terminal 20 may have the function of the base station 10. Also, words such as "upstream", "downstream", etc. may be replaced with words corresponding to inter-terminal communication (e.g., "side"). For example, the uplink channel, the downlink channel, and the like may be replaced with the side channel.

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

In the present disclosure, it is assumed that the operation performed by the base station is sometimes performed by an upper node (upper node) thereof, depending on the case. In a network including 1 or more network nodes (network nodes) having a base station, it is apparent that various operations performed for communication with a terminal may be performed by the base station, 1 or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like are considered, but not limited thereto), or a combination thereof.

The aspects and embodiments described in the present disclosure may be used alone, or in combination, or may be switched with execution. Note that, the processing procedures, sequences, flowcharts, and the like of the respective modes/embodiments described in the present disclosure may be reversed as long as they are not contradictory. For example, elements of the various steps are presented in the order shown in the method described in the present disclosure, and are not limited to the specific order presented.

The aspects/embodiments described in the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), SUPER3G, IMT-Advanced, 4th generation Mobile communication System (4th generation communication System (4G)), 5th generation Mobile communication System (5G)), Future Radio Access (FRA)), Radio Access Technology (New-RAT), New Radio (NR)), New Radio Access (NX)), next generation Radio Access (FX), Global Mobile communication System (Global System for Mobile communication (GSM) and Mobile Broadband (CDMA) registration (2000) B)), and so on, IEEE 802.11(Wi-Fi (registered trademark)), IEEE 802.16(WiMAX (registered trademark)), IEEE 802.20, Ultra-wideband (uwb), Bluetooth (registered trademark)), a system using another appropriate wireless communication method, a next generation system expanded based on them, and the like. Further, a plurality of systems may be applied in combination (for example, combination of LTE or LTE-a and 5G).

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

Any reference to the use of "first," "second," etc. elements in this disclosure is not intended to limit the number or order of such elements in a comprehensive manner. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to first and second elements does not mean that only two elements may be employed or that the first element must precede the second element in some fashion.

The term "determining" used in the present specification may include various operations. For example, "determining" may be considered "determining" with respect to a decision (judging), calculation (calculating), processing (processing), derivation (deriving), investigation (investigating), retrieval (logging up, search, retrieval) (e.g., a search in a table, database, or other data structure), confirmation (authenticating), and the like.

The term "determination (decision)" may be used to refer to "determination (decision)" of reception (e.g., reception information), transmission (e.g., transmission information), input (input), output (output), access (e.g., access to data in a memory), and the like.

The "determination (decision)" may be regarded as "determination (decision)" performed on solution (resolving), selection (selecting), selection (breathing), establishment (evaluating), comparison (comparing), and the like. That is, "judgment (decision)" may be regarded as "judgment (decision)" performed on some operation.

The "determination (decision)" may be replaced with "assumption", "expectation", "assumption".

The terms "connected", "coupled" and the like, or all variations thereof, used in the present disclosure mean all connections or couplings, direct or indirect, between two or more elements, and can include a case where 1 or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may also be replaced with "access".

In the present disclosure, when 2 or more elements are connected, it can be considered that 1 or more wires, cables, printed electrical connections, and the like are used, and as some non-limiting and non-exhaustive examples, electromagnetic energy having a wavelength in a radio frequency domain, a microwave domain, a light (both visible light and invisible light) domain, and the like are used to be "connected" or "coupled" to each other.

In the present disclosure, the term "a is different from B" may also mean "a is different from B". In addition, the term may also mean "A and B are each different from C". The terms "separate", "combine", and the like may also be construed as "different" in the same way.

Where the terms "including", "including" and "comprising" and variations thereof are used in this disclosure, these terms are intended to be inclusive in the same way as the term "comprising". Further, the term "or" as used in this disclosure means not a logical exclusive or.

In the present disclosure, where articles such as a, an, and the in english are added by translation, the present disclosure includes cases where nouns after these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it is obvious to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention defined by the claims. Accordingly, the description of the present disclosure is intended to be illustrative, and not to be construed as limiting the invention in any way.

The application is based on the special application 2019-. The contents of which are all incorporated herein.