CN116195286A - Terminal, wireless communication method and base station - Google Patents

Abstract

A terminal according to an embodiment of the present disclosure includes: a control unit that controls a dominant of a Channel Occupation Time (COT) in at least one of 1 or more dominant opportunities of the COT in a semi-static channel access procedure; and a transmitting unit that transmits a specific Uplink (UL) channel in the COT. According to one aspect of the present disclosure, wireless communication in an NR-U system can be appropriately controlled.

Description

Terminal, wireless communication method and base station

Technical Field

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

Background

In a universal mobile telecommunications system (Universal Mobile Telecommunications System (UMTS)) network, long term evolution (Long Term Evolution (LTE)) is standardized for the purpose of further high-speed data rates, low latency, and the like (non-patent document 1). Further, for the purpose of further large capacity, high altitude, and the like of LTE (third generation partnership project (Third Generation Partnership Project (3 GPP)) Release (rel.)) versions 8 and 9, LTE-Advanced (3 GPP rel.10-14) has been standardized.

Subsequent systems of LTE (e.g., also referred to as fifth generation mobile communication system (5 th generation mobile communication system (5G)), 5g+ (plus), new Radio (NR)), 3gpp rel.15 later, and the like are also being studied.

Prior art literature

Non-patent literature

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

Disclosure of Invention

Problems to be solved by the invention

In future wireless communication systems (e.g., also referred to as 5G, 5g+, new Radio (NR)), 3gpp rel.16 and later, and the like), the use of Unlicensed bands (also referred to as NR-Unlicensed (U) systems) is being investigated, as in existing wireless communication systems (e.g., 3gpp rel.15 and earlier).

In addition, in future wireless communication systems (e.g., also referred to as 5G, 5g+, new Radio (NR)), 3gpp rel.16 and beyond, and the like), introduction of downlink control information (Downlink Control Information (DCI)) formats (e.g., DCI formats 0_2, 1_2) for traffic types such as highly Reliable and Low-delay communications (e.g., ultra-Reliable and Low-Latency Communications (URLLC)) is under study.

However, in uplink communication in traffic types such as URLLC, there is insufficient research regarding a User Equipment (UE) -dominant (UE-initiated)) channel occupation time (Channel Occupancy Time (COT)) for FBE (frame-based Equipment).

Accordingly, it is an object of the present disclosure to provide a terminal, a wireless communication method, and a base station capable of appropriately controlling wireless communication in an NR-U system.

Means for solving the problems

A terminal according to an aspect of the present disclosure includes: a control unit controlling the dominance of a Channel Occupation Time (COT) in at least one of more than 1 dominance opportunities of the COT during semi-static channel access. The method comprises the steps of carrying out a first treatment on the surface of the And a transmitting unit that transmits a specific Uplink (UL) channel in the COT.

ADVANTAGEOUS EFFECTS OF INVENTION

According to one aspect of the present disclosure, wireless communication in an NR-U system can be appropriately controlled.

Drawings

Fig. 1 is a diagram showing an example of the COT dominated by the base station in rel.16.

Fig. 2 is a diagram illustrating an example of UE-dominant COT.

Fig. 3 is a diagram illustrating an example of the UE-dominant COT and the COT-dominant opportunity.

Fig. 4 is a diagram showing a UE-dominant COT and another example of a COT-dominant opportunity.

Fig. 5 is a diagram illustrating a UE-dominant COT and another example of a COT-dominant opportunity.

Fig. 6 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment.

Fig. 7 is a diagram showing an example of a configuration of a base station according to an embodiment.

Fig. 8 is a diagram showing an example of a configuration of a user terminal according to an embodiment.

Fig. 9 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment.

Detailed Description

(service (business type))

In future wireless communication systems (e.g., NR), further elevation of mobile broadband (e.g., enhanced mobile bandwidth (enhanced Mobile Broadband (eMBB))), machine-type communication (e.g., large-scale machine-type communication (massive Machine Type Communications (emtc)), internet of things (Internet of Things (IoT)), high-reliability and Low-latency communication (e.g., ultra-Reliable and Low-Latency Communications (URLLC)), and other traffic types (also referred to as types, services, service types, communication types, use cases, etc.) are envisaged. For example, in URLLC, smaller delay and higher reliability are required compared to eMBB.

Regarding traffic types, in the physical layer, it may also be identified based on at least one of the following.

Logical channels with different priorities (priorities);

modulation and coding scheme (Modulation and Coding Scheme (MCS)) table (MCS index table);

Channel quality indication (Channel Quality Indication (CQI)) table;

DCI format;

a (radio network temporary identifier (system information-radio network temporary identifier (RNTI: system Information-Radio Network Temporary Identifier)) used in scrambling (mask) of (appended) cyclic redundancy check (CRC: cyclic Redundancy Check) bits contained in the DCI (DCI format);

RRC (radio resource control (Radio Resource Control)) parameters;

specific RNTI (e.g., RNTI for URLLC, MCS-C-RNTI, etc.);

search space;

specific fields within the DCI (e.g., newly appended fields or reuse of existing fields).

Specifically, the service type of HARQ-ACK (or PUCCH) for PDSCH may be determined based on at least one of the following.

An MCS index table (for example, whether or not MCS index table 3 is used) used for determining at least one of the modulation order (modulation order), target code rate (target code rate), and transport block size (TBS: transport Block size) of the PDSCH;

RNTI used in CRC scrambling of DCI for scheduling of the PDSCH (e.g., CRC scrambling with either C-RNTI or MCS-C-RNTI);

Priority set by higher layer signaling.

In the present disclosure, the higher layer signaling may also be one of radio resource control (Radio Resource Control (RRC)) signaling, medium access control (Medium Access Control (MAC)) signaling, broadcast information, or the like, or a combination thereof, for example.

MAC signaling may also use, for example, MAC control elements (MAC Control Element (MAC CE)), MAC protocol data units (MAC Protocol Data Unit (PDU)), and the like. The broadcast information may be, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), minimum system information (remaining minimum system information (Remaining Minimum System Information (RMSI))), other system information (Other System Information (OSI)), or the like.

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

The service type may be associated with a communication requirement (a requirement such as delay and error rate), a data type (voice, data, etc.), and the like.

The difference between the elements of URLLC and the elements of eMBB may be that the delay (latency) of URLLC is smaller than the delay of eMBB, or that the elements of URLLC include a reliability element.

For example, the user (U) plane delay requirement of an eMBB may also include: the U-plane delay of the downlink is 4ms and the U-plane delay of the uplink is 4ms. On the other hand, the U-plane delay requirement of URLLC may include: the U-plane delay of the downlink is 0.5ms and the U-plane delay of the uplink is 0.5ms. The requirements for reliability of URLLC may include: the error rate of 32 bytes in a U-plane delay of 1ms is 10-5.

In addition, as an enhanced ultra-reliable and low-latency communication (eURLLC), a high degree of reliability (reliability) of traffic for unicast data is mainly studied. Hereinafter, the term "URLLC" will be simply referred to as "URLLC" without distinguishing between URLLC and eulllc.

In the NRs of rel.16 and beyond, priorities of a plurality of levels (for example, 2 levels) are set for a specific signal or channel. For example, it is conceivable to set a separate priority for each signal or channel corresponding to a different traffic type (also referred to as service, service type, communication type, use case, etc.), and perform communication control (for example, transmission control at the time of collision, etc.). Thus, it is possible to control communication by setting different priorities according to the service type and the like for the same signal or channel

The priority may be set for a signal (e.g., UCI such as HARQ-ACK, reference signal, etc.), a channel (PDSCH, PUSCH, etc.), or HARQ-ACK codebook. The priority may also utilize a first priority (e.g., high) and a second priority (e.g., low) that is lower than the first priority. Alternatively, 3 or more priorities may be set. The information related to priority may also be notified from the base station to the UE using at least one of higher layer signaling and DCI.

For example, the priority may be set for HARQ-ACK for dynamically scheduled PDSCH, HARQ-ACK for semi-persistent PDSCH (SPS PDSCH), and HARQ-ACK for SPS PDSCH release. Alternatively, the priority may be set for the HARQ-ACK codebook corresponding to these HARQ-ACKs. In addition, when the priority is set for the PDSCH, the priority of the PDSCH may be replaced with the priority of the HARQ-ACK for the PDSCH.

In case of collision of different UL signals/UL channels, the UE may control UL transmission based on priority. For example, control is performed such that UL transmission with high priority is performed, and UL transmission with low priority is not performed (e.g., discard). Alternatively, the transmission timing of the UL transmission with the low priority may be changed (for example, delayed or offset).

The collision of different UL signals/UL channels may be a case where time resources (or time resources and frequency resources) of different UL signals/UL channels overlap, or a case where transmission timings of different UL signals/UL channels overlap.

In the case of notifying priority by DCI, a bit field (for example, a priority indicator (Priority indicator)) for notifying priority may be set in the DCI, or may be notified from a base station or set to a UE by higher layer signaling. In addition, when the bit field for notifying the priority is not included in the DCI, the UE may determine that the priority of the PDSCH (or the HARQ-ACK corresponding to the PDSCH) scheduled by the DCI is a specific priority (for example, low).

(unauthorized zone)

In an unlicensed band (e.g., 2.4GHz band, 5GHz band, 6GHz band, etc.), it is assumed that a plurality of systems such as Wi-Fi system and a system (LAA system) supporting Licensed-Assisted Access (LAA)) coexist, and therefore, it is considered that collision avoidance and/or interference control for transmission between the plurality of systems is required.

In the LAA of the conventional LTE system (e.g., rel.13), a data transmission device monitors whether or not transmission of other devices (e.g., a base station, a user terminal, a Wi-Fi device, etc.) is performed before transmission of data in an unlicensed band. This monitoring may also be referred to as: listen before talk (Listen Before Talk (LBT)), clear channel assessment (Clear Channel Assessment (CCA)), carrier sensing, sensing of channels (sensing), channel access operations (channel access procedure ), shared spectrum channel access operations (shared spectrum channel access procedure ), energy Detection (ED), and the like.

The transmitting apparatus may be a base station (for example, also referred to as a gndeb (gNB), or a Network (NW)) in Downlink (DL), and may be a user terminal (UE) in Uplink (UL). Further, the reception device that receives data from the transmission device may be, for example, a user terminal in DL and a base station (NW) in UL.

In the LAA of the existing LTE system, the transmitting apparatus starts data transmission after detecting that there is no transmission (idle state) of other apparatuses from the LBT for a certain period (for example, a period immediately after or after a backoff).

In future wireless communication systems (e.g., also referred to as 5G, 5g+, new Radio (NR)), 3gpp rel.15 and beyond, etc.), the use of unlicensed bands is also being studied. NR systems utilizing Unlicensed bands may also be referred to as NR-Unlicensed (U) systems, NR LAA systems, and the like.

The dual connection (Dual Connectivity (DC)) of the authorized and unauthorized bands, the independent (Stand-Alone (SA)) of the unauthorized bands, etc. may also be included in the NR-U.

Regarding nodes (e.g., base stations, UEs) in the NR-U, transmission starts after confirming that a channel is empty (idle) by LBT due to coexistence with other systems or other operators.

In NR-U, in case that the LBT result is idle, a base station (e.g., gNB) or UE obtains a transmission opportunity (Transmission Opportunity (TxOP)) and transmits. In case the LBT result is busy (LBT busy), the base station or UE does not transmit. The time of the transmission opportunity may also be referred to as channel occupancy time (Channel Occupancy Time (COT)).

In addition, LBT idle (LBT-idle) may be replaced with LBT success (LBTsource). LBT busy (LBT-busy) may also be replaced with LBT failure (LBTfail).

(FBE/LBE)

In future wireless communication systems (e.g., rel.16 and beyond NR), UEs are being studied for LBT based on multiple LBT types. As a mechanism of the LBT, FBE (frame-based apparatus) may be used, or LBE (load-based apparatus) may be used.

The FBE may also be referred to as an LBT scheme having a fixed frame period, sensing in a part of its resources, transmitting if a channel is available, and waiting until the next sensing timing without transmitting if the channel is unavailable.

In NR after rel.16, when a specific higher layer parameter (e.g., channelAccessMode-r 16) is provided for a UE and the specific higher layer parameter satisfies a specific condition (e.g., is set to ChannelAccessMode-r16=semi-static), NW and UE may perform LBT based on FBE. FBE-based LBT may also be referred to as semi-static (semi static) LBT.

On the other hand, LBE may be an LBT mechanism in which, when the channel is not usable as a result of sensing, the sensing period is prolonged and the sensing is continued until the channel is usable.

In NR after rel.16, when a specific higher layer parameter (e.g., channelAccessMode-r 16) is provided for a UE and the specific higher layer parameter satisfies a specific condition (e.g., is set to ChannelAccessMode-r16=dynamic, or ChannelAccessMode-r16 is not specified), NW and UE may perform LBT based on LBE.

LBT based on LBE may also be referred to as dynamic (dynamic) LBT. LBT based on LBE may also be distinguished by the type of LBT. The type of LBT may also be referred to as a channel access type, a channel access mode, a shared channel access type, etc.

In NR after rel.16, channel access types can also be distinguished as one of type 1, type 2A, type 2B, type 2C.

The names of the channel access types are not limited to these. As for the name of the channel access type, for example, X of the "channel access type X" may be represented by any number, letter, or a combination of a number and a letter, or may be another name.

The type 1 channel access may be a channel access having a variable transmission standby time (collision window size (Contention Window Size (CWS)) accompanied by a random back-off. The type 1 channel access may also be a channel access type used in a coexistence environment with other unlicensed bands (e.g., wi-fi).

In type 1 channel access, a terminal (including a terminal in another wireless communication standard)/gNB may sense during a specific period before signal transmission. The specific period may be constituted by at least an extended period (also referred to as a delay duration (delay), for example, 43 μs) and a sense time slot (for example, 9 μs).

In the type 1 channel access, a specific counter (timer) may be set for the terminal/gNB, and when the counter expires (the value of the counter=0), transmission of a signal may be permitted.

The counter may also be decremented every 1 sensing time slot (e.g., 9 mus) passes. The counter set to the terminal/gNB may be stopped during a specific period (a period during which the signal is transmitted) when the signal transmission by the terminal/gNB other than the terminal/gNB is detected (LBT busy). The counter may be restarted after a predetermined period (a period during which the signal is transmitted) has elapsed.

When the value of the counter set to the plurality of terminals/gnbs at a certain instant becomes 0 and the transmission of the signals of the plurality of terminals/gnbs is repeated, the CWS of the terminal may be expanded.

The type 2A channel access may also be a channel access that does not accompany random back-off.

In the type 2A channel access, a first period including a period in which sensing is performed (for example, a period of 25 μs (may also be referred to as a sensing period (interval)), a gap, or the like)) may be set, and the UE may perform sensing during the period. When the LBT is idle (LBT idle) during the sensing, the UE immediately transmits a signal after the lapse of the period.

The type 2B channel access may also be a channel access that does not accompany random back-off. In the type 2B channel access, a second period (for example, a period of 16 μs) including a period during which the UE performs the sensing may be set. When the LBT is idle (LBT idle) during the sensing, the UE immediately transmits a signal after the lapse of the period.

The type 2C channel access may be a channel access in which a period equal to or less than a first period or a second period (for example, 16 μs) is set for the UE, however, sensing is not performed during the period. The UE may transmit a signal in a specific period (for example, a period of 584 μs max) immediately after the lapse of the period.

May also be for controllingDuring sensing in each type of channel access, cyclic Prefix (CP) extension (extension) is set. CP extension may also be represented by a specific time corresponding to the CP extension index. At T _TA When the timing advance is set, the specific time may be 25 μs or 16+T _TA μs、25+T _TA At least one of μs.

The UE may also receive information related to the above-described channel access type and CP extension (CP extension) indication based on at least one of the higher layer signaling and the physical layer signaling.

In FBE-based LBT before rel.16, a base station and a UE transmit and receive Uplink (UL)/Downlink (DL) signals/channels using base station dominant (gNB-associated) COT. The base station dominant COT may be a COT obtained by sensing by a certain base station (NW).

The base station dominant COT may also be contained within a fixed frame period (Fixed Frame Period (FFP)) prior to Rel.16. The FFP may also be referred to as periodic channel occupancy (Periodic Channel Occupancy (PCO)). It is also possible that the start position of the FFP every 2 consecutive radio frames coincides with the start position of a specific (e.g., with even index) radio frame.

The period of the FFP may also be set/notified to the UE through higher layer signaling. The higher layer signaling may also be system information fast 1 (System Information Block 1 (SIB 1)) signaling/RRC signaling. The higher layer parameter set/notified by this higher layer signaling may also be emiStaticChannelAccessConfig. The period may be determined from, for example, 1ms, 2ms, 2.5ms, 4ms, 5ms, and 10 ms.

Fig. 1 is a diagram showing an example of the COT dominated by the base station in rel.16. The base station (gNB) senses during a specific period (e.g., may also be referred to as a sensing time slot) immediately before the start of the FFP. The FFP is constituted by the COT, a specific idle period during which transmission and reception of a signal/channel are not performed, and a period during which sensing is performed (sensing time slot).

In case the result of this sensing is that LBT is successful, the gNB obtains COT (gNB dominant COT). The COT is included in the FFP (here, a period of 10 ms), and a start position of the COT coincides with a start position of the FFP (alignment). The start position of the FFP coincides with the start position of each radio frame (here, frame #0 and frame # 1). The gNB transmits DL signals and UL signals and channels in the obtained COT.

In the gNB-dominant COT, the gNB may first transmit the DL signal/channel. In other words, in the gNB-dominant COT, the UE may also first receive DL signals/channels.

However, in the case where a transmission opportunity of a specific uplink signal/channel (for example, a grant (CG)) PUSCH is set to the UE in the FFP including the COT which the base station has dominant, there is considered a case where the specific uplink signal/channel is not actually transmitted in the transmission opportunity because there is no UL traffic in the transmission opportunity. In this case, since channel access by other nodes (at least one of the UE and the gNB) cannot be performed in the FFP, delay reduction is greatly affected. In this regard, the start position of the COT dominated by the base station in the existing (rel.16 prior) specification is only allowed to be located at the start position of the FFP containing the COT, which is one of the reasons.

In addition, in the COT dominated by the base station, it is a concern that the base station cannot recognize whether or not other uplink signals/channels (e.g., SR/PRACH) are actually transmitted in the transmission opportunity in the COT.

In the case of transmitting and receiving such uplink signals/channels (for example, at least one of CG-PUSCH, SR, and PRACH), as a method for realizing highly reliable and low-delay communication, introduction of UE-dominant COT for FBE is being studied. However, there is insufficient research on the UE-dominant COT.

When such studies are insufficient, there is a concern that performance of delay reduction deteriorates when a service type such as URLLC is used in an NR-U system.

Accordingly, the present inventors have conceived a method of constructing an FFP including a UE-dominant COT in the case of using a traffic type such as URLLC in an NR-U system

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

In the present disclosure, "a/B" may be replaced with at least one of a and B, and "a/B/C" may be replaced with at least one of B and C.

In this disclosure, the gNB dominated COT may also be referred to as a first COT, a semi-static COT in the FBE, etc. Further, in the present disclosure, the FFP for the gNB-dominant COT may also be referred to as an FFP for the first COT, an FFP contained in the first COT, a first FFP, an FFP for a semi-static COT in the FBE, or the like.

In this disclosure, the UE-dominant COT may also be referred to as a second COT, a dynamic COT in an FBE, etc. Further, in the present disclosure, the FFP for the UE-dominant COT may also be referred to as an FFP for the second COT, an FFP contained in the second COT, a second FFP, an FFP for a dynamic COT in the FBE, and the like.

In the present disclosure, the second COT may be obtained in the COT master set to the UE, or the control for obtaining the second COT may be performed in the COT master set to the UE.

(Wireless communication method)

< first embodiment >, first embodiment

In the first embodiment, a specific period (for example, a COT master opportunity (COT master opportunity, COT initiate occasion)) for ensuring the second COT by the UE is described. The UE may acquire the second COT in a specific period of 1 or more (for example, in the COT master opportunity) included in the FFP, and the UE may determine the COT master opportunity according to at least one of the following embodiments 1-1 to 1-3.

In addition, in the present disclosure, the COT-dominant opportunity may also be referred to as an opportunity for dominant COT, a period for dominant COT, an opportunity for obtaining UE-dominant COT, a period for obtaining UE-dominant COT, and the like.

[ embodiment 1-1]

The UE may also obtain a second COT for transmitting a specific Uplink (UL) signal/channel (e.g., CG-PUSCH/SR/PRACH) in the presence of traffic for that UL signal/channel. In other words, in the presence of traffic for a specific UL signal/channel, the UE may also acquire a COT master opportunity in which a second COT is acquired. This case of UL signal/channel traffic may also mean that UL traffic is received from a higher layer (e.g., from the MAC layer to the PHY layer).

At this time, the UE may perform sensing during a certain period before transmission of the UL signal/channel. In case that the sensing (LBT) is successful, the UE can transmit UL signal/channel.

In this case, the period of the second COT may be included in a certain 1 FFP. The second COT period may not be repeated with an idle period of the FFP (an idle period set at the end of the FFP).

In this case, the period of the second COT may be set over a plurality of FFPs. The second COT period may also be repeated with idle periods of the plurality of FFPs.

Fig. 2 is a diagram illustrating an example of UE-dominant COT. In the example of fig. 2, a first COT (gcb dominant COT) is included in ffp#0, and a second COT (UE dominant COT) is included in ffp#1. The gNB may obtain the first COT in FFP#1, and the first FFP in FFP#1 may be the same as the first FFP in FFP#0. In the example shown in fig. 2, the period (period) of the FFP is set to 10ms, however, the period of the FFP is not limited thereto.

In ffp#1, the UE may set transmission opportunities (txo#0 to txo#2) of a plurality of specific UL signals/channels (e.g., CG-PUSCH). Txo#0 and txo#1 indicate that there is no transmission opportunity of UL traffic, and txo#2 indicates that there is actually a transmission opportunity of UL traffic. In this transmission opportunity, the UE performs LBT immediately before txo#2, and if this LBT is successful, obtains a second COT. Next, the specific UL signal/channel may be transmitted in the transmission opportunity (i.e., txo#2) included in the second COT. In this case, immediately before txo#0 and txo#1, the second COT may not be dominant.

In addition, in the present disclosure, in the UE-dominant COT, the UE may first transmit UL signals/channels and then may receive DL signals/channels. For example, UL may be set (or UL transmission may be scheduled) at the beginning symbol of the UE-dominant COT.

In the drawings showing the structure of the COT of the present disclosure, the length and arrangement of FFP, COT, period used for transmission and reception of signals and channels, and the like are merely examples, and are not limited thereto.

According to embodiment 1-1, flexible communication corresponding to the presence of actual UL traffic can be performed.

[ embodiments 1 to 2]

The UE may acquire the second COT in a specific period (COT master opportunity) included in the FFP. The COT master opportunity may also be notified/set to the UE according to specific higher layer parameters based on higher layer signaling (e.g., SIB1 signaling/RRC signaling).

The COT master opportunity may also be set to the UE independently of the transmission opportunity of a particular UL signal/channel (e.g., CG-PUSCH/SR/PRACH) set to the UE. That is, the UE may acquire the second COT during the COT master period set independently of the transmission opportunity of the set specific UL signal/channel.

Fig. 3 is a diagram illustrating an example of the UE-dominant COT and the COT-dominant opportunity. In the example of fig. 3, the configuration of the FFP, the first COT, the transmission opportunity of the UL signal/channel, the idle period, and the like is the same as the example of fig. 2.

In the ffp#1, the UE may set transmission opportunities (txo#0 to txo#2) of a plurality of specific UL signals/channels (e.g., CG-PUSCH) and the COT master opportunity. The UE performs LBT immediately before at least one of the transmission opportunities (e.g., txO # 2) included in the COT master opportunity, and obtains a second COT if the LBT is successful. Next, the specific UL signal/channel may be transmitted in the transmission opportunity (i.e., txo#2) included in the second COT.

Further, the COT master opportunity may also be set to the UE in association with a transmission opportunity of a specific UL signal/channel (e.g., CG-PUSCH/SR/PRACH) set to the UE. Specifically, for example, the COT master opportunity may be set to include a transmission opportunity of a specific UL signal/channel set to the UE. For example, the COT master opportunity may be set in a time resource that is repeated with a transmission opportunity of a specific UL signal/channel set to the UE.

Fig. 4 is a diagram showing a UE-dominant COT and another example of a COT-dominant opportunity. In the example of fig. 4, the configuration of the FFP, the first COT, the transmission opportunity of the UL signal/channel, the idle period, and the like is the same as the example of fig. 2.

In the ffp#1, the UE may set transmission opportunities (txo#0 to txo#2) of a plurality of specific UL signals/channels (e.g., CG-PUSCH) and the COT master opportunity. The COT master opportunity may also be set such that at least one (e.g., txO # 2) containing the transmission opportunity (or, in the same time resource as the transmission opportunity). The UE performs LBT immediately before the transmission opportunity (e.g., txo#2) included in the COT master opportunity, and obtains a second COT if the LBT is successful. Next, the specific UL signal/channel may be transmitted in the transmission opportunity (i.e., txo#2) included in the second COT.

According to embodiments 1 to 2, the COT of the UE can be appropriately controlled by the NW (e.g., base station).

[ embodiments 1 to 3]

The UE may acquire the second COT in a specific period (COT master opportunity) included in the FFP. The COT master opportunity may also be indicated to the UE based on a specific field contained in the DCI. In addition, the UE may also obtain the second COT so as to include the time resources for transmitting the UL signal/channel indicated through the DCI.

The DCI may be DCI in an FFP before a certain FFP for triggering/scheduling UL signals/channels in the certain FFP. Further, the DCI may be DCI indicating a transmission opportunity of a specific UL signal/channel (e.g., CG-PUSCH).

When the second COT is not present in a certain FFP, the UE may acquire the second COT at the time of transmission of the UL signal/channel, and transmit the UL signal/channel in the second COT. In addition, when a second COT already exists (is acquired) in a certain FFP, the UE may also transmit the UL signal/channel in the second COT.

Fig. 5 is a diagram showing a UE-dominant COT and yet another example of a COT-dominant opportunity. In the example of fig. 5, the configuration of the FFP, the first COT, the idle period, and the like is the same as the example of fig. 2.

The UE receives a certain DCI in the first COT. The DCI is DCI for scheduling a specific UL signal/channel in ffp#1. The COT master opportunity may also be set such that the time resource containing the transmission of the UL signal/channel (or, in the same time resource as the transmission opportunity). The UE performs LBT immediately before the time resource included in the COT master opportunity, and obtains a second COT if the LBT is successful. Then, the specific UL signal/channel may be transmitted in the transmission opportunity included in the second COT.

According to embodiments 1 to 3, the COT acquisition of the UE based on the NW (e.g., base station) can be further dynamically controlled.

< second embodiment >

In a second embodiment, a method of applying a second COT to an UL signal/channel is described. The UE may use the second COT at the time of transmission of the UL signal/channel according to at least one of embodiments 2-1 and 2-2 shown below. As for the operation of the second COT, any of the methods shown in the first embodiment may be used.

[ embodiment 2-1]

The UE may also set the second COT in common for a plurality (e.g., all) of UL signals/channels and transmit the UL signals/channels.

The plurality of UL signals/channels may be at least one of PUCCH/PUSCH/PRACH/SRS set by a higher layer parameter, PUCCH/PUSCH/PRACH/SRS triggered/scheduled by DCI, and PUSCH scheduled by RAR UL grant.

At this time, information related to the dominant opportunity of the COT may also be notified/set to the UE through higher layer signaling (e.g., SIB1 signaling/RRC signaling).

According to embodiment 2-1, the UE-dominant COT can be set in common for a plurality of UL signals/channels, and an increase in signaling overhead can be suppressed.

[ embodiment 2-2]

The UE may set the second COT for a specific set of UL signals/channels and transmit the UL signals/channels.

The set of UL signals/channels may be determined from at least one of PUCCH/PUSCH/PRACH/SRS set by higher layer parameters, PUCCH/PUSCH/PRACH/SRS triggered/scheduled by DCI, and PUSCH scheduled by RAR UL grant, and notified/set to the UE via higher layer signaling (e.g., SIB1 signaling/RRC signaling).

In this case, even if the NW (e.g., gNB) does not recognize whether or not the actual UL signal/channel (e.g., CG-PUSCH/SR/PRACH) traffic is present, the NW can perform setting.

According to embodiment 2-2, the UE-based COT acquisition can be appropriately controlled by the NW (e.g., base station).

< third embodiment >

In a third embodiment, a method of applying the second COT to a plurality of UEs included in a certain serving cell will be described. The UE may use the second COT when transmitting the UL signal/channel, assuming that at least one of embodiments 3-1 and 3-2 shown below is applied. The operation of the second COT may be any of the methods described in the first embodiment.

Embodiment 3-1

The UE may set the second COT for a plurality of (e.g., all) UEs included in a certain serving cell in common, and transmit UL signals/channels.

At this time, information on the dominant COT set to the UE may be notified to the UE by higher layer signaling (for example, SIB1 signaling/RRC signaling).

The information on the second FFP (COT) set to the UE may be indicated to the UE by physical layer signaling (e.g., a group-common PDCCH).

According to embodiment 3-1, the UE-dominant COT can be set in common for a plurality of UEs included in the serving cell, and an increase in signaling overhead can be suppressed.

[ embodiment 3-2]

The UE may set the second COT independently for each UE included in a certain serving cell, and may transmit the UL signal/channel.

At this time, the information related to the second FFP (COT) set to the UE (for example, at least one of information related to a start position of the second FFP (COT) and information related to a period of the second FFP (COT)) may be notified, set, and indicated to the UE by higher layer signaling (for example, RRC signaling) and physical layer signaling (for example, DCI).

According to embodiment 3-2, the second COT can be determined for each UE included in the serving cell, and more flexible communication can be performed.

(Wireless communication System)

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

Fig. 6 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 by using long term evolution (Long Term Evolution (LTE)) standardized by the third generation partnership project (Third Generation Partnership Project (3 GPP)), the fifth generation mobile communication system new wireless (5 th generation mobile communication system New Radio (5G NR)), or the like.

The wireless communication system 1 may support dual connection (Multi-RAT dual connection (Multi-RAT Dual Connectivity (MR-DC))) between a plurality of radio access technologies (Radio Access Technology) (RATs). MR-DC may also include a dual connection of LTE (evolved universal terrestrial radio Access (Evolved Universal Terrestrial Radio Access (E-UTRA))) with NR (E-UTRA-NR dual connection (E-UTRA-NR Dual Connectivity (EN-DC))), NR with LTE (NR-E-UTRA dual connection (NR-E-UTRADual Connectivity (NE-DC))), etc.

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 also support dual connections between multiple base stations within the same RAT (e.g., dual connection (NR-NR dual connection (NR-NR Dual Connectivity (NN-DC))) of a base station (gNB) where both MN and SN are NRs).

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

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

Each CC may be included in at least one of the first Frequency band (Frequency Range 1 (FR 1)) and the second Frequency band (Frequency Range 2 (FR 2))). The macrocell C1 may be included in the FR1 and the small cell C2 may be included in the FR 2. For example, FR1 may be a frequency band of 6GHz or less (lower than 6GHz (sub-6 GHz)), 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 thereto, and for example, FR1 may correspond to a frequency band higher than FR 2.

The user terminal 20 may communicate with at least one of time division duplex (Time Division Duplex (TDD)) and frequency division duplex (Frequency Division Duplex (FDD)) in each CC.

Multiple base stations (e.g., RRHs) 10 can also be connected by wire (e.g., fiber based common public radio interface (Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to a higher-level station may be referred to as an integrated access backhaul (Integrated Access Backhaul (IAB)) donor (donor), and the base station 12 corresponding to a relay station (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 (Evolved Packet Core (EPC)), a 5G Core Network (5 GCN), a next generation Core (Next Generation Core (NGC)), and the like, for example.

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

In the wireless communication system 1, a wireless access scheme based on orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) may be used. For example, cyclic prefix OFDM (Cyclic Prefix OFDM (CP-OFDM)), discrete fourier transform spread OFDM (Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access (OFDMA)), single carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access (SC-FDMA)), and the like may be used in at least one of Downlink (DL)) and Uplink (UL).

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

In the radio communication system 1, as the downlink channel, a downlink shared channel (physical downlink shared channel (Physical Downlink Shared Channel (PDSCH))), a broadcast channel (physical broadcast channel (Physical Broadcast Channel (PBCH)))), a downlink control channel (physical downlink control channel (Physical Downlink Control Channel (PDCCH))), or the like shared by the user terminals 20 may be used.

In the radio communication system 1, an uplink shared channel (physical uplink shared channel (Physical Uplink Shared Channel (PUSCH))), an uplink control channel (physical uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (physical random access channel (Physical Random Access Channel (PRACH))), or the like shared by the user terminals 20 may be used as the uplink channel.

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

Lower layer control information may also be transmitted through the 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 for scheduling PDSCH may be referred to as DL assignment, DL DCI, or the like, and the DCI for scheduling PUSCH may be referred to as UL grant, UL DCI, or the like. The PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

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

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

Uplink control information (Uplink Control Information (UCI)) including at least one of channel state information (Channel State Information (CSI)), transmission acknowledgement information (for example, also referred to as hybrid automatic repeat request acknowledgement (Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)), ACK/NACK, etc.), and scheduling request (Scheduling Request (SR)) may be transmitted through the PUCCH. The random access preamble for establishing a connection with a cell may also be transmitted through the PRACH.

In addition, in the present disclosure, downlink, uplink, etc. may also be expressed without "link". It may be expressed that the "Physical" is not provided at the beginning of each channel.

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, as DL-RS, a Cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.

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

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

(base station)

Fig. 7 is a diagram showing an example of a configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting/receiving unit 120, a transmitting/receiving antenna 130, and a transmission path interface (transmission line interface (transmission line interface)) 140. The control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided with one or more components.

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

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

The control unit 110 may also control generation of signals, scheduling (e.g., resource allocation, mapping), etc. 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 path interface 140. The control unit 110 may generate data, control information, a sequence (sequence), and the like transmitted as signals, and forward the generated data to the transmitting/receiving 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 transmitting/receiving unit 120 may include a baseband (baseband) unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting/receiving unit 120 may be configured of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmitting/receiving circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmitting/receiving unit 120 may be configured as an integral transmitting/receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmission unit may be composed of the transmission processing unit 1211 and the 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 may be constituted by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna or the like.

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

The transmitting-receiving unit 120 may also 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.

The transmission/reception section 120 (transmission processing section 1211) may perform processing of a packet data convergence protocol (Packet Data Convergence Protocol (PDCP)) layer, processing of a radio link control (Radio Link Control (RLC)) layer (for example, RLC retransmission control), processing of a medium access control (Medium Access Control (MAC)) layer (for example, HARQ retransmission control), and the like with respect to data, control information, and the like acquired from the control section 110, for example, to generate a bit sequence to be transmitted.

The transmission/reception section 120 (transmission processing section 1211) may perform transmission processing such as channel coding (error correction coding may be included), modulation, mapping, filter processing, discrete fourier transform (Discrete Fourier Transform (DFT)) processing (if necessary), inverse fast fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, precoding, and digital-to-analog conversion on a bit string to be transmitted, and output a baseband signal.

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

On the other hand, the transmitting/receiving unit 120 (RF unit 122) may amplify, filter-process, demodulate a baseband signal, and the like, with respect to a signal in a radio frequency band received through the transmitting/receiving antenna 130.

The transmitting/receiving section 120 (reception processing section 1212) may apply, to the acquired baseband signal, reception processing such as analog-to-digital conversion, fast fourier transform (Fast Fourier Transform (FFT)) processing, inverse discrete fourier transform (Inverse Discrete Fourier Transform (IDFT)) processing (if necessary), filter processing, demapping, demodulation, decoding (error correction decoding may be included), MAC layer processing, RLC layer processing, and PDCP layer processing, and acquire user data.

The transmitting-receiving unit 120 (measuring unit 123) may also perform measurements related to the received signals. For example, measurement section 123 may perform radio resource management (Radio Resource Management (RRM)) measurement, channel state information (Channel State Information (CSI)) measurement, and the like based on the received signal. The measurement unit 123 may also measure reception power (for example, reference signal reception power (Reference Signal Received Power (RSRP))), reception quality (for example, reference signal reception quality (Reference Signal Received Quality (RSRQ)), signal-to-interference-plus-noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal-to-noise ratio (Signal to Noise Ratio (SNR))), signal strength (for example, received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (for example, CSI), and the like. The measurement results may also be output to the control unit 110.

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

In addition, 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 path interface 140.

The control unit 110 may also control transmission of information related to more than 1 dominant opportunities of Channel Occupation Time (COT) in a semi-static channel access procedure. The transmitting/receiving unit 120 may receive an Uplink (UL) channel in the COT included in the 1 or more dominant opportunities (first embodiment)

(user terminal)

Fig. 8 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 transmitting/receiving unit 220, and a transmitting/receiving antenna 230. The control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided with one or more types.

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

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

The control unit 210 may also control the generation of signals, mapping, etc. 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, control information, a sequence, and the like transmitted as signals, and forward the generated data to the transmitting/receiving unit 220.

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

The transmitting/receiving unit 220 may be configured as an integral transmitting/receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmission means may be constituted by the transmission processing means 2211 and the RF means 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 may be constituted by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna or the like.

The transceiver unit 220 may also receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transceiver unit 220 may transmit the uplink channel, the uplink reference signal, and the like.

The transmitting-receiving unit 220 may also 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.

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

The transmission/reception section 220 (transmission processing section 2211) may perform transmission processing such as channel coding (error correction coding may be included), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion, and the like for a bit string to be transmitted, and output a baseband signal.

Further, whether to apply DFT processing may be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmission/reception section 220 (transmission processing section 2211) may perform DFT processing as the transmission processing for transmitting the channel using a DFT-s-OFDM waveform, or, if not, the transmission/reception section 220 (transmission processing section 2211) may not perform DFT processing as the transmission processing.

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

On the other hand, the transmitting/receiving unit 220 (RF unit 222) may amplify, filter-process, demodulate a baseband signal, and the like, with respect to a signal in a radio frequency band received through the transmitting/receiving antenna 230.

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

The transceiver unit 220 (measurement unit 223) may also perform measurements related to the received signals. For example, the measurement unit 223 may also perform RRM measurement, CSI measurement, and the like based on the received signal. The 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), etc. The measurement results may also be output to the control unit 210.

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

The control unit 210 may control the dominant of Channel Occupation Time (COT) in at least one of 1 or more dominant opportunities of the COT during semi-static channel access. The transmitting/receiving unit 220 may transmit a specific Uplink (UL) channel in the COT (first embodiment).

The dominant opportunity of the COT may be set in association with or independent of the transmission opportunity of the specific UL channel (first embodiment).

The control unit 210 may control the dominant of the COT in common for a plurality of Uplink (UL) channels or independently for each set of UL channels (second embodiment).

The control unit 210 may notify information related to the COT, either commonly for a plurality of terminals in the serving cell or independently for each terminal in the serving cell (third embodiment).

(hardware construction)

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

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

For example, a base station, a user terminal, and the like in one embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig. 9 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 may be physically configured as computer devices including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In addition, in the present disclosure, terms of devices, circuits, apparatuses, parts (sections), units, and the like can be replaced with 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 drawings, or may be configured to not include a part of the devices.

For example, the processor 1001 is shown as only one, but there may be multiple processors. Further, the processing may be performed by one processor, or the processing may be performed by two or more processors simultaneously, sequentially, or by other means. The processor 1001 may be realized by one or more chips.

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

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

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

The storage 1003 may also be a computer-readable recording medium, for example, composed of at least one of a flexible disk (flexible disk), a Floppy (registered trademark)) disk, an magneto-optical disk (for example, a Compact disk read only memory (CD-ROM), etc.), a digital versatile disk, a Blu-ray (registered trademark) disk, a removable disk (removable disk), a hard disk drive, a smart card (smart card), a flash memory device (for example, a card, a stick, a key drive), a magnetic stripe (stripe), a database, a server, and other appropriate storage medium.

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

The input device 1005 is an input apparatus (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output apparatus (for example, a display, a speaker, a light emitting diode (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).

The processor 1001, the memory 1002, and other devices 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 (Digital Signal Processor (DSP)), an application specific integrated circuit (Application Specific Integrated Circuit (ASIC)), a programmable logic device (Programmable Logic Device (PLD)), and a field programmable gate array (Field Programmable Gate Array (FPGA)), or may be configured to implement a part or all of the functional blocks by using the hardware. For example, the processor 1001 may also be installed with at least one of these hardware.

(modification)

In addition, with respect to terms described in the present disclosure and terms required for understanding the present disclosure, terms having the same or similar meanings may be substituted. For example, channels, symbols, and signals (signals or signaling) may also be interchanged. In addition, the signal may also be a message. The Reference Signal (RS) can also be simply referred to as RS, and may also be referred to as Pilot (Pilot), pilot Signal, or the like, depending on the standard applied. In addition, the component carrier (Component Carrier (CC)) may also be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

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

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

A slot may also be formed from one or more symbols in the time domain, orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, single carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access (SC-FDMA)) symbols, and so on. Furthermore, the time slots may also be time units based on parameter sets.

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

The radio frame, subframe, slot, mini-slot, and symbol each represent a unit of time when a signal is transmitted. The radio frames, subframes, slots, mini-slots, and symbols may also use other designations that each corresponds to. In addition, the frame, subframe, slot, mini-slot, symbol, and the like units in the present disclosure may also be replaced with each other.

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

Here, TTI refers to, for example, a scheduled minimum time unit in wireless communication. For example, in the LTE system, a base station performs scheduling for each user terminal to allocate radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited thereto.

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

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

A TTI having a time length of 1ms may also be referred to as a normal TTI (TTI in 3gpp rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, etc. A TTI that is shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial or fractional 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 less than the long TTI and a TTI length of 1ms or more.

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

Further, the RB may also contain one or more symbols in the time domain, and may be one slot, one mini-slot, one subframe, or one TTI length. One TTI, one subframe, etc. may also be respectively composed of one or more resource blocks.

In addition, one or more RBs may also be referred to as Physical Resource Blocks (PRBs), subcarrier groups (SCGs), resource element groups (Resource Element Group (REGs)), PRB pairs, RB peering.

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

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

The BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). For a UE, one or more BWP may be set within 1 carrier.

At least one of the set BWP may be active, and the UE may not contemplate transmission and reception of a specific signal/channel other than the active BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced with "BWP".

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

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

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

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

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

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

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

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), or the like. 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. The MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).

Note that the notification of specific information (for example, notification of "X") is not limited to explicit notification, and may be performed implicitly (for example, by notification of no specific information or notification of other information).

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

Software, whether referred to as software (firmware), middleware (middleware-ware), microcode (micro-code), hardware description language, or by other names, should be broadly interpreted as meaning instructions, instruction sets, codes (codes), code segments (code fragments), program codes (program codes), programs (programs), subroutines (sub-programs), software modules (software modules), applications (applications), software applications (software application), software packages (software packages), routines (routines), subroutines (sub-routines), objects (objects), executable files, threads of execution, procedures, functions, and the like.

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

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

In the context of the present disclosure of the present invention, terms such as "precoding", "precoder", "weight", "Quasi Co-Location", "transmission setting instruction state (Transmission Configuration Indication state (TCI state))", "spatial relation", "spatial 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 can be used interchangeably.

In the present disclosure, terms such as "Base Station (BS)", "radio Base Station", "fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gndb)", "access point", "transmission point (transmission point (TP))", "Reception Point (RP))", "Transmission Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", and the like can be used interchangeably. There are also cases where the base station is referred to by terms of a macrocell, a small cell, a femtocell, a picocell, and the like.

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

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

In some cases, a mobile station is also referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, or a number of other appropriate terms.

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

In addition, the base station in the present disclosure may be replaced with a user terminal. For example, the various aspects/embodiments of the present disclosure may also be applied to a structure 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-to-evaluation (V2X), or the like. In this case, the user terminal 20 may have the functions of the base station 10 described above. Note that the expressions "uplink" and "downlink" and the like may be replaced with expressions (e.g., "side") corresponding to communication between terminals. For example, the uplink channel, the downlink channel, and the like may be replaced with side channels.

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

In the present disclosure, an operation performed by a base station is sometimes performed by an upper node (upper node) thereof, as the case may be. Obviously, in a network comprising one or more network nodes (network nodes) with base stations, various operations performed for communication with a terminal may be performed by a base station, one or more network nodes other than a base station (e.g. considering a mobility management entity (Mobility Management Entity (MME)), a Serving-Gateway (S-GW)), or the like, but not limited thereto, or a combination thereof.

The embodiments described in the present disclosure may be used alone, in combination, or switched depending on the execution. The processing procedures, sequences, flowcharts, and the like of the embodiments and embodiments described in this disclosure may be changed in order as long as they are not contradictory. For example, for the methods described in the present disclosure, elements of the various steps are presented using the illustrated order, but are not limited to the particular order presented.

The various modes/embodiments described in the present disclosure can also be applied to long term evolution (Long Term Evolution (LTE)), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, fourth generation mobile communication system (4 th generation mobile communication system (4G)), fifth generation mobile communication system (5 th generation mobile communication system (5G)), future wireless access (Future Radio Access (FRA)), new wireless access technology (New-Radio Access Technology (RAT)), new wireless (New Radio (NR)), new generation wireless access (Future generation Radio access (FX)), global system for mobile communication (Global System for Mobile communications (GSM (registered trademark)), CDMA2000, ultra mobile broadband (Ultra Mobile Broadband (UMB)), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX registered trademark)), IEEE 802.20, ultra broadband (Ultra-wide (UWB)), bluetooth (registered trademark), other systems that utilize methods of wireless communication, and the like, and can be obtained as appropriate. Furthermore, multiple systems may also be applied in combination (e.g., LTE or LTE-a, in combination with 5G, etc.).

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

Any reference to elements using references to "first," "second," etc. in this disclosure does not fully define the amount or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not indicate that only two elements may be employed, or that the first element must take precedence over the second element in some manner.

The term "determining" as used in this disclosure encompasses in some cases a wide variety of operations. For example, "determination" may be regarded as a case where "determination" is made on determination (computing), calculation (calculating), processing (processing), derivation (deriving), investigation (searching), search (lookup), search, inquiry (searching in a table, database, or other data structure), confirmation (accounting), or the like.

Further, "determination (decision)" may be regarded as a case where "determination (decision)" is made on reception (e.g., receiving information), transmission (e.g., transmitting information), input (input), output (output), access (access) (e.g., accessing data in a memory), or the like.

Further, "judgment (decision)" may be regarded as a case of "judgment (decision)" of resolution (resolution), selection (selection), selection (setting), establishment (establishment), comparison (comparison), or the like. That is, the "judgment (decision)" can also be regarded as a case where some actions are "judged (decided)".

The "judgment (decision)" may be replaced with "assumption", "expectation", "consider", or the like.

The terms "connected", "coupled", or all variants thereof as used in this disclosure mean all connections or couplings, either direct or indirect, between two or more elements thereof, and can include the case where one or more intervening elements are present between two elements that are "connected" or "coupled" to each other. The combination or connection of the elements may be physical, logical, or a combination of these. For example, "connection" may be replaced with "access".

In the present disclosure, in the case of connecting two elements, it can be considered that one or more wires, cables, printed electrical connections, etc. are used, and electromagnetic energy having wavelengths in the radio frequency domain, the microwave region, the optical (both visible and invisible) region, etc. are used as several non-limiting and non-inclusive examples to "connect" or "combine" with each other.

In the present disclosure, the term "a is different from B" may also mean that "a is different from B". In addition, the term may also mean that "A and B are each different from C". Terms such as "separate," coupled, "and the like may also be construed in the same manner as" different.

In the present disclosure, when "including", and variations thereof are used, these terms are meant to be inclusive in the same sense as the term "comprising". Further, the term "or" as used in this disclosure does not refer to exclusive or.

In the present disclosure, for example, in the case where an article is appended by translation as in a, an, and the in english, the present disclosure may also include the case where a noun following the article is in plural form.

While the invention according to the present disclosure has been described in detail, it will be apparent to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as a modification and variation without departing from the spirit and scope of the invention defined based on the description of the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not intended to limit the invention in any way.

Claims (6)

1. A terminal, comprising:

a control unit for controlling the dominant of COT in at least one of more than 1 dominant opportunities of COT, which is channel occupation time in a semi-static channel access process; and

and a transmitting unit configured to transmit a UL channel, which is a specific uplink channel, in the COT.

2. The terminal of claim 1, wherein,

the dominant opportunity of the COT is set in association with or independent of the transmission opportunity of the specific UL channel.

3. The terminal of claim 1, wherein,

the control unit controls the dominance of the COT either commonly for a plurality of uplink channels, UL channels, or independently per each set of UL channels.

4. The terminal of claim 1, wherein,

the control unit is conceived to be notified of the information related to the COT commonly for a plurality of terminals in the serving cell or independently for each terminal in the serving cell.

5. A wireless communication method for a terminal includes:

a step of controlling the dominance of the COT in at least one of channel occupation time, i.e. more than 1 dominance opportunity of the COT, in a semi-static channel access procedure; and

and transmitting a UL channel, which is a specific uplink channel, in the COT.

6. A base station, comprising:

the control unit is used for controlling the channel occupation time in the semi-static channel access process, namely, the transmission of information related to more than 1 dominant opportunities of the COT; and

and a receiving unit configured to receive an uplink channel, that is, an UL channel, from among the COTs included in the 1 or more dominant opportunities.

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