WO2021075523A1 - Terminal and wireless communication method - Google Patents

Abstract

A terminal according to one embodiment of the present disclosure has a reception unit that receives downlink control information for releasing a plurality of semi-persistent scheduling (SPS), and a control unit that assesses the priority of a hybrid automatic repeat request acknowledgment (HARQ-ACK) corresponding to the downlink control information on the basis of at least one of HARQ-ACK priorities respectively corresponding to the plurality of semi-persistent scheduling or a previously set priority.

Description

Terminal and wireless communication method

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

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

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

In an existing LTE system (for example, LTE Rel.8-15), the user terminal (UE: User Equipment) is a UL data channel (for example, PUSCH: Physical Uplink Shared Channel) and a UL control channel (for example, PUCCH: Physical Uplink). Uplink control information (UCI: Uplink Control Information) is transmitted using at least one of the Control Channels.

UCI uses, for example, retransmission control information (also referred to as HARQ-ACK (Hybrid Automatic Repeat reQuest Acknowledgement)), ACK / NACK, A / N, etc. for downlink shared channels (PDSCH: Physical Downlink Shared Channel), scheduling requests (SR: Scheduling) Request), channel state information (CSI: Channel State Information), etc. may be included.

In future wireless communication systems (for example, NR or Rel.16 or later), transmission / reception based on semi-persistent scheduling (SPS) will be used.

Existing Rel. 15 NR had a specification that SPS was not set for more than one serving cell at the same time per cell group (that is, one SPS was set per cell group).

By the way, in NR after Rel-16, it is considered to set a plurality of SPS (multiple SPS) in one cell group for more flexible control. In addition, Rel. For NRs 16 and above, deactivating multiple SPSes with one SPS release is being considered. Such SPS releases may be referred to as SPS releases for a plurality of SPSs, joint SPS releases, and the like.

Further, in the NR after Rel-16, it is considered that the priority is set for a predetermined signal (for example, HARQ-ACK).

However, how to set the priority of HARQ-ACK for the joint SPS release has not been examined yet.

Therefore, one of the purposes of the present disclosure is to provide a terminal and a wireless communication method capable of appropriately controlling the transmission of HARQ-ACK even when using the joint SPS release.

The terminal according to one aspect of the present disclosure includes a receiving unit that receives downlink control information for releasing a plurality of semi-persistent scheduling (SPS), and a hybrid corresponding to the downlink control information. A control unit that determines the priority of Automatic Repeat reQuest ACK knowledgement (HARQ-ACK) based on at least one of the priorities of HARQ-ACK corresponding to each of the plurality of semi-persistent scheduling or a preset priority. It is characterized by having.

According to one aspect of the present disclosure, the transmission of HARQ-ACK can be appropriately controlled even when the joint SPS release is used.

1A and 1B are diagrams showing an example of feedback of HARQ-ACK for a joint SPS release that releases a plurality of SPS settings. 2A-2C are diagrams showing an example of the priority set in HARQ-ACK corresponding to each SPS setting. 3A-3C are diagrams showing an example of determining the priority of HARQ-ACK with respect to the joint SPS release. 4A and 4B are diagrams showing other examples of determining the priority of HARQ-ACK for joint SPS release. 5A and 5B are diagrams showing other examples of determining the priority of HARQ-ACK for joint SPS release. 6A and 6B are diagrams showing other examples of determining the priority of HARQ-ACK for joint SPS release. 7A and 7B are diagrams showing other examples of determining the priority of HARQ-ACK for joint SPS release. FIG. 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 9 is a diagram showing an example of the configuration of the base station according to the embodiment. FIG. 10 is a diagram showing an example of the configuration of the user terminal according to the embodiment. FIG. 11 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.

(SPS)
In NR, transmission / reception based on Semi-Persistent Scheduling (SPS) is used. In the present disclosure, SPS may be read interchangeably with downlink SPS (Downlink (DL) SPS).

The UE may activate or deactivate (release) the SPS setting based on the downlink control channel (Physical Downlink Control Channel (PDCCH)). The UE may receive the downlink shared channel (Physical Downlink Shared Channel (PDSCH)) of the corresponding SPS based on the activated SPS setting.

In the present disclosure, PDCCH may be read as downlink control information (Downlink Control Information (DCI)) transmitted using PDCCH, simply DCI or the like. Further, in the present disclosure, SPS, SPS setting, SPS reception, SPS PDSCH reception, SPS scheduling and the like may be read as each other.

The DCI for activating or deactivating the SPS setting may be referred to as SPS activation DCI, SPS deactivation DCI, or the like. The SPS deactivation DCI may be referred to as an SPS release DCI, simply an SPS release, or the like.

The DCI has a Cyclic Redundancy Check (CRC) bit scrambled by a predetermined RNTI (eg, Configure Scheduling Radio Network Temporary Identifier (CS-RNTI)). May be good.

The DCI may be a DCI format for PUSCH scheduling (DCI format 0_0, 0_1, etc.), a DCI format for PDSCH scheduling (DCI format 1_0, 1_1, etc.), or a bit string in which one or more fields are constant. When indicated, SPS activation DCI or SPS release DCI may be indicated.

The SPS setting (which may be referred to as setting information regarding the SPS) may be set in the UE using higher layer signaling.

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

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

The setting information related to SPS (for example, the "SPS-Config" information element of RRC) includes an index for identifying SPS (SPS index), information about SPS resources (for example, SPS cycle), and information about PUCCH resources for SPS. Etc. may be included.

The UE may determine the length of the SPS, the start symbol, etc. based on the time domain allocation field of the SPS activation DCI.

The SPS may be set to a special cell (Special Cell (SpCell)) (for example, a primary cell (PCell) or a primary secondary cell (Primary Secondary Cell (PSCell))), or a secondary cell (Secondary Cell). (SCell)) may be set.

However, the existing Rel. 15 NR has a specification that SPS is not set for more than one serving cell at the same time per cell group (that is, one SPS is set per cell group). Only one SPS setting may be allowed (set) for each Bandwidth Part (BWP) of the serving cell.

(HARQ-ACK Codebook)
The UE transmits HARQ-ACK feedback using one PUCCH resource in units of HARQ-ACK codebooks composed of bits of one or more delivery confirmation information (eg, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)). You may. The HARQ-ACK bit may be referred to as HARQ-ACK information, HARQ-ACK information bit, or the like.

Here, the HARQ-ACK codebook includes a time domain (for example, a slot), a frequency domain (for example, a component carrier (CC)), a spatial domain (for example, a layer), and a transport block (Transport Block (TB)). )), And a bit for HARQ-ACK in at least one unit of the code block group (Code Block Group (CBG)) constituting the TB may be included. The HARQ-ACK codebook may simply be referred to as a codebook.

The number of bits (size) and the like included in the HARQ-ACK codebook may be determined quasi-static (semi-static) or dynamically (dynamic). The HARQ-ACK codebook whose size is determined quasi-statically is also called a quasi-static HARQ-ACK codebook, a type 1 HARQ-ACK codebook, or the like. The HARQ-ACK codebook whose size is dynamically determined is also called a dynamic HARQ-ACK codebook, a type 2 HARQ-ACK codebook, or the like.

Whether to use the type 1 HARQ-ACK codebook or the type 2 HARQ-ACK codebook may be set in the UE by using the upper layer parameter (for example, pdsch-HARQ-ACK-Codebook).

In the case of a type 1 HARQ-ACK codebook, the UE has a PDSCH candidate (or PDSCH) corresponding to the predetermined range in a predetermined range (for example, a range set based on the upper layer parameter) regardless of whether PDSCH is scheduled or not. The HARQ-ACK bit for the opportunity may be fed back.

The predetermined range is set or activated in the UE for a predetermined period (for example, a set of a predetermined number of opportunities (occasions) for receiving candidate PDSCHs or a predetermined number of monitoring opportunities (monitoring occupations) of PDCCH). It may be determined based on at least one of the number of CCs, the number of TBs (number of layers or ranks), the number of CBGs per TB, and whether or not spatial bundling is applied. The predetermined range is also referred to as a HARQ-ACK window, a HARQ-ACK bundling window, a HARQ-ACK feedback window, or the like.

In the type 1 HARQ-ACK codebook, the UE allocates the HARQ-ACK bit for the PDSCH in the codebook as long as it is within a predetermined range even if there is no PDSCH scheduling for the UE. When the UE determines that the PDSCH is not actually scheduled, the UE can feed back the bit as a NACK bit.

On the other hand, in the case of the type 2 HARQ-ACK codebook, the UE may feed back the HARQ-ACK bit for the scheduled PDSCH within the above predetermined range.

Specifically, the UE may determine the number of bits in the Type 2 HARQ-ACK codebook based on a predetermined field in the DCI (for example, the Downlink Assignment Indicator (Index) (DAI)) field). Good. The DAI field may include a counter DAI (Counter DAI (C-DAI)) and a total DAI (Total DAI (T-DAI)).

C-DAI may indicate a counter value of downlink transmission (PDSCH, data, TB) scheduled within a predetermined period. For example, the C-DAI in the DCI that schedules data within the predetermined period may indicate the number counted first in the frequency domain (eg, CC) and then in the time domain within the predetermined period. For example, C-DAI may correspond to a value obtained by counting PDSCH reception or SPS release in ascending order of serving cell index and then in ascending order of PDCCH monitoring opportunity for one or more DCIs included in a predetermined period.

T-DAI may indicate the total value (total number) of data scheduled within a predetermined period. For example, a T-DAI in a DCI that schedules data in a time unit (eg, PDCCH monitoring opportunity) within the predetermined period is scheduled by the time unit (also referred to as point, timing, etc.) within the predetermined period. The total number of data collected may be shown.

Existing Rel. 15 In NR, the order of the HARQ-ACK bits in the codebook is determined as follows. For Type 1 HARQ-ACK codebooks, the UE will place the HARQ-ACK bits corresponding to the SPS PDSCH and SPS releases in the same way as the HARQ-ACK bits corresponding to the dynamic PDSCH (eg, a list of time domain resource allocations). Place in the HARQ-ACK codebook (according to (table)). There is no difference in the handling of SPS PDSCH, SPS release, and dynamic PDSCH that correspond to the PDSCH reception opportunity within a predetermined period.

In addition, Rel. 15 For the NR type 1 HARQ-ACK codebook, the position of the HARQ-ACK bit for SPS release is the same as the position of the HARQ-ACK bit for SPS PDSCH reception corresponding to the SPS release (similarly determined). ).

Also, the existing Rel. In 15 NR, for a type 2 HARQ-ACK codebook, the UE may place the HARQ-ACK bit corresponding to the SPS PDSCH after the HARQ-ACK codebook corresponding to the dynamic TB-based PDSCH.

Furthermore, the existing Rel. At 15 NR, the UE does not expect to transmit HARQ-ACK information for more than 1 SPS PDSCH reception in the same PUCCH.

<Activate / deactivate multi-SPS settings>
By the way, Rel. In NR after 16 for more flexible control, it is considered to set a plurality of SPS (multiple SPS) in one cell group. The UE may utilize multiple SPS settings for one or more serving cells. For example, the UE may activate or deactivate multiple SPS settings for a Bandwidth Part (BWP) of a serving cell, each based on a separate DCI.

Also, Rel. For NRs 16 and above, it is considered to activate multiple SPS settings using one SPS activation DCI. Such SPS activation DCI may be referred to as SPS activation DCI for a plurality of SPS settings, joint SPS activation DCI, and the like.

Also, Rel. For NRs 16 and above, deactivating multiple SPS settings with one SPS release is being considered. Such SPS releases may be referred to as SPS releases for a plurality of SPS settings, joint SPS releases, DCIs for joint SPSs, SPS deactivation DCIs, joint SPS deactivation DCIs, and the like.

It is conceivable that the UE transmits HARQ-ACK for the joint SPS release. FIG. 1A shows an example of a HARQ-ACK feedback method for a joint SPS release that collectively deactivates a plurality of SPS settings. Here, the case where the UE receives the joint SPS release instructing the deactivation of the SPS settings # 1 to # 3 and feeds back HARQ-ACK for the joint SPS release is shown.

<Priority setting>
In addition, Rel. In the NR after 16th, it is considered to set the priority of a plurality of levels (for example, 2 levels) for a predetermined signal. For example, communication is controlled by setting different priorities for each signal or channel corresponding to different traffic types (also referred to as services, service types, communication types, use cases, etc.) (for example, transmission control in the event of a collision). Is expected to be done. This allows different priorities (eg, different priorities depending on service type) to be set for the same signal or channel.

The priority may be set for a signal (eg, UCI, reference signal, etc.), channel, HARQ-ACK codebook, or the like. The priority may be defined by a first priority (for example, High) and a second priority (for example, Low) that is lower than the first priority. Alternatively, three or more types of priorities may be set. Information about the priority may be notified from the base station to the UE using at least one of higher layer signaling and DCI.

For example, priorities may be set for the dynamically scheduled HARQ-ACK for PDSCH, HARQ-ACK for semi-persistent PDSCH (SPS PDSCH), and HARQ-ACK for SPS PDSCH release. Alternatively, priorities may be set for the HARQ-ACK codebooks corresponding to these HARQ-ACKs.

The priority may be set by explicit notification such as higher layer signaling from the network (for example, a base station). For example, priority may be set or mapped to at least one of HARQ-ACK for SPS PDSCH and ACK for SPS PDSCH release by using higher layer signaling for notifying each SPS setting (SPS PDSCH configuration).

On the other hand, as described above, it is conceivable that a priority is also set for HARQ-ACK for a joint SPS release (for example, a joint SPS PDSCH release) that deactivates a plurality of SPS settings at once. However, the problem is how to set the priority for HARQ-ACK (for example, 1 bit) for the joint SPS release corresponding to a plurality of SPS configurations (or releasing a plurality of SPS configurations).

For example, when different priorities are set for HARQ-ACK corresponding to a plurality of SPS settings, how to set the priority of HARQ-ACK of the joint SPS release becomes a problem. In FIG. 1B, the first priority (High) is set for HARQ-ACK corresponding to SPS settings # 1 and # 2 (for example, HARQ-ACK for SPS release), and HARQ- corresponding to SPS setting # 3 is set. It shows the case where the second priority (Low) is set for ACK. The HARQ-ACK priority corresponding to each SPS setting may be set by higher layer signaling (for example, RRC signaling used for SPS setting or new RRC signaling).

In such a case, how to set the priority of HARQ-ACK for joint SPS release corresponding to SPS settings # 1 to # 3 becomes a problem. If the priority of the HARQ-ACK for the joint SPS release is not set appropriately, the HARQ-ACK for the joint SPS release cannot be properly transmitted, and the communication throughput may deteriorate.

Therefore, the present inventors have conceived a method of appropriately determining the priority of HARQ-ACK and controlling the transmission of HARQ-ACK even when using the joint SPS release. According to one aspect of the present invention, the priority can be appropriately set for HARQ-ACK for joint SPS release.

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

In the present disclosure, the priority of HARQ-ACK may be read as the priority of the HARQ-ACK codebook used for transmitting the HARQ-ACK. Further, in the following description, HARQ-ACK for the joint SPS release (or joint SPS deactivation DCI) is given as an example, but it may be applied to HARQ-ACK for the joint SPS activation DCI.

Further, in the following description, the first priority (High) and the second priority (Low) are given as examples as examples, but the number and type of priorities are not limited to this. Three or more priorities (or three levels) may be applied. Further, the priority set for each signal or channel may be set for the UE by higher layer signaling or the like.

(Wireless communication method)
<First Embodiment>
In the first embodiment, the priority for HARQ-ACK corresponding to each of the plurality of SPS settings corresponding to the joint SPS release is set to be the same (or not set to different priorities).

Allow different priority settings for HARQ-ACK (eg, at least one of HARQ-ACK for SPS PDSCH and HARQ-ACK for SPS PDSCH release) corresponding to the SPS setting that is released collectively in the joint SPS release. Does not support.

FIG. 2 is a diagram showing an example of the priority to be set in HARQ-ACK corresponding to a plurality of SPS settings (here, SPS settings # 1 to # 3). The priority for HARQ-ACK corresponding to each SPS setting may be set by higher layer signaling or the like.

As shown in FIG. 2A, the first priority (High) is set for the SPS settings # 1 to # 3 corresponding to the joint SPS release, and as shown in FIG. 2B, the joint SPS release is supported. A configuration in which a second priority (Low) is set for the SPS settings # 1 to # 3 to be performed is supported (or allowed).

On the other hand, as shown in FIG. 2C, the first priority (High) is given to some of the SPS settings # 1 to # 3 (here, SPS settings # 1 and # 2) corresponding to the joint SPS release. ) Is set, and a second priority (Low) is set for other settings (here, SPS setting # 3) is not supported (or allowed).

In this case, the same priority set for HARQ-ACK corresponding to SPS settings # 1 to # 3 may be set for the priority of HARQ-ACK for joint SPS release. For example, as shown in FIG. 2A, the UE may assume that the HARQ-ACK for joint SPS release has a first priority (High). As shown in FIG. 2B, the UE may assume that the HARQ-ACK for joint SPS release has a second priority (Low).

Thereby, the UE can appropriately determine the priority of HARQ-ACK of the joint SPS release corresponding to the plurality of SPS settings based on the priority set in each SPS setting. In this case, one priority may be set in the UE as the priority set in each SPS setting.

<Second embodiment>
The second embodiment allows or supports different priority settings for HARQ-ACK corresponding to each of the plurality of SPS settings corresponding to the joint SPS release (see FIG. 3).

As shown in FIG. 3A, the first priority (High) is set for the SPS settings # 1 to # 3 corresponding to the joint SPS release, and as shown in FIG. 3B, the joint SPS release is supported. A configuration in which a second priority (Low) is set for the SPS settings # 1 to # 3 to be performed is supported.

Further, as shown in FIG. 3C, the first priority (High) is given to some of the SPS settings # 1 to # 3 (here, SPS settings # 1 and # 2) corresponding to the joint SPS release. Is set, and a second priority (Low) is set for other settings (here, SPS setting # 3). As a result, the priority of HARQ-ACK corresponding to each SPS setting can be flexibly set.

In this way, when setting different priorities for each HARQ-ACK for multiple SPS settings corresponding to the joint SPS release is allowed, the priority of HARQ-ACK for the joint SPS release is determined based on a predetermined rule or a predetermined condition. You may. For example, the UE may utilize at least one of the following options 1-5 to prioritize HARQ-ACK over joint SPS releases.

[Option 1]
The priority of HARQ-ACK with respect to the joint SPS release may be a predetermined priority. For example, regardless of the priority of HARQ-ACK corresponding to a plurality of SPS settings (SPS settings # 1 to # 3), even if the first priority (High) is set for HARQ-ACK for the joint SPS release. Good.

The UE determines that the HARQ-ACK priority for the joint SPS release is the first priority (High), even if the HARQ-ACKs corresponding to the plurality of SPS settings have different priorities. It may be assumed (see FIG. 4).

In FIG. 4A, the first priority (High) is set for some of the SPS settings # 1 to # 3 (here, SPS settings # 1 and # 2) corresponding to the joint SPS release, and the others. A second priority (Low) is set with respect to the setting (here, SPS setting # 3). In such a case, the UE assumes that the HARQ-ACK priority for the joint SPS release is the first priority (High) regardless of the priority set in the HARQ-ACK of the SPS settings # 1 to # 3. (See FIG. 4B).

The priority (here, the first priority (High)) preset in HARQ-ACK for the joint SPS release may be defined in the specifications, or the network may use higher layer signaling or the like. The UE may be notified.

In this way, by fixedly setting the priority of HARQ-ACK for the joint SPS release, even when the priority of HARQ-ACK corresponding to each SPS configuration is set separately, the priority for the joint SPS release is set. The priority of HARQ-ACK can be appropriately determined.

[Option 2]
A second priority (Low) may be set for HARQ-ACK for the joint SPS release regardless of the priority of HARQ-ACK corresponding to each of the plurality of SPS settings (SPS settings # 1 to # 3).

The UE determines that the HARQ-ACK priority for the joint SPS release is the second priority (High), even if the HARQ-ACKs corresponding to the plurality of SPS settings have different priorities. You may assume. The priority (here, the second priority (Low)) preset in HARQ-ACK for the joint SPS release may be defined in the specifications, or may be defined from the network by using higher layer signaling or the like. The UE may be notified.

[Option 3]
The priority of HARQ-ACK for the joint SPS release may be determined based on the state (or condition) of each SPS setting. The state of each SPS setting may be the priority set in HARQ-ACK corresponding to each SPS setting.

For example, among the priorities set in the HARQ-ACK for the plurality of SPS settings corresponding to the joint SPS release, the priority set most may be the priority of the HARQ-ACK for the joint SPS release.

If the number of first priority (High) set in the HARQ-ACK corresponding to each SPS setting is greater than the number of second priority (Low), the UE is determined of the HARQ-ACK for the joint SPS release. It may be assumed that the priority is the first priority (High). On the other hand, if the number of second priorities (Low) set in the HARQ-ACK corresponding to each SPS setting is greater than the number of first priority (High), the UE will perform HARQ for the joint SPS release. It may be assumed that the priority of -ACK is the second priority (Low).

In FIG. 5A, the first priority (High) is set for some of the SPS settings # 1 to # 3 (here, SPS settings # 1 and # 2) corresponding to the joint SPS release, and the others. A second priority (Low) is set with respect to the setting (here, SPS setting # 3). In such a case, the number of the first priority (High) is set to be larger than the number of the second priority (Low) for the HARQ-ACK of the SPS settings # 1 to # 3. Therefore, the UE assumes that the HARQ-ACK priority for the joint SPS release is the first priority (High) (see FIG. 5B).

This allows the UE to properly prioritize the HARQ-ACK of the joint SPS release, even if each HARQ-ACK for multiple SPS settings corresponding to the joint SPS release is allowed to have a different priority setting. You can judge. If the number of priority types set in each of the plurality of SPS setting HARQ-ACKs corresponding to the joint SPS release is the same, other options may be applied to determine the priority.

[Option 4]
The priority of HARQ-ACK for the joint SPS release may be determined based on the value corresponding to each SPS setting and the predetermined parameter corresponding to each SPS setting. The value corresponding to each SPS setting may be an index of the SPS setting. The predetermined parameter corresponding to each SPS setting may be the periodicity corresponding to each SPS setting.

For example, among a plurality of SPS settings corresponding to the joint SPS release, the priority set in HARQ-ACK corresponding to the SPS setting having the smallest index may be set as the priority of HARQ-ACK with respect to the joint SPS release. That is, the UE may assume that the priority set in HARQ-ACK for the SPS setting with the lowest index is the same as the priority of HARQ-ACK for the joint SPS release.

Alternatively, among a plurality of SPS settings corresponding to the joint SPS release, the priority set in HARQ-ACK corresponding to the SPS setting having the maximum index may be set as the priority of HARQ-ACK with respect to the joint SPS release. That is, the UE may assume that the priority set in HARQ-ACK for the SPS setting with the highest index is the same as the priority of HARQ-ACK for the joint SPS release (see FIG. 6).

In FIG. 6A, the first priority (High) is set for some of the SPS settings # 1 to # 3 (here, SPS settings # 1 and # 2) corresponding to the joint SPS release, and the others. A second priority (Low) is set with respect to the setting (here, SPS setting # 3). In such a case, a second priority (Low) is set for HARQ-ACK of SPS setting # 3 having the maximum index. Therefore, the UE has the same priority set to HARQ-ACK for the SPS setting # 3 having the maximum index and the priority of HARQ-ACK for the joint SPS release (here, the second priority (Low)). ) (See FIG. 6B).

Alternatively, among a plurality of SPS settings corresponding to the joint SPS release, the priority set to HARQ-ACK corresponding to the SPS setting that minimizes the periodicity (or period) of the SPS (for example, SPS PDSCH) is jointed. It may be the priority of HARQ-ACK over the SPS release. That is, the UE may assume that the priority set in HARQ-ACK for the SPS setting with the least periodicity is the same as the priority of HARQ-ACK for the joint SPS release.

Alternatively, among a plurality of SPS settings corresponding to the joint SPS release, the priority set to HARQ-ACK corresponding to the SPS setting that maximizes the periodicity of the SPS (for example, SPS PDSCH) is set to HARQ- for the joint SPS release. It may be the priority of ACK. That is, the UE may assume that the priority set in HARQ-ACK for the SPS setting with maximum periodicity is the same as the priority of HARQ-ACK for the joint SPS release.

In this way, by determining the priority corresponding to the joint SPS release based on the predetermined conditions for each SPS setting, each HARQ-ACK for a plurality of SPS settings is allowed to set a different priority. However, the UE can appropriately determine the priority of HARQ-ACK of the joint SPS release.

[Option 5]
The priority of HARQ-ACK with respect to the joint SPS release may be notified to the UE by using a DL signal (for example, DCI) for notifying the joint SPS release. The UE may determine the priority of HARQ-ACK for the joint SPS release based on the DCI notifying the joint SPS release (see FIG. 7).

In FIG. 7A, the first priority (High) is set for some of the SPS settings # 1 to # 3 (here, SPS settings # 1 and # 2) corresponding to the joint SPS release, and the others. A second priority (Low) is set with respect to the setting (here, SPS setting # 3). In such a case, the UE will perform a HARQ-ACK for the joint SPS release based on the priority obtained from the joint SPS release (DCI), regardless of the priority set for the HARQ-ACK of the SPS settings # 1 to # 3. Determine the priority. Here, the case where the first priority (High) is notified by the joint SPS release (DCI) is shown (see FIG. 7B).

Information regarding the priority of HARQ-ACK with respect to the joint SPS release may be included in the DL signal (for example, DCI) notifying the joint SPS release. Alternatively, the UE may be implicitly notified by associating a predetermined priority with the transmission condition or transmission parameter of the DCI. The DCI transmission condition or parameter may be at least one of the DCI format, the type of RNTI applied, and the bit value of a given field (eg, at least one of NDI and RV) contained in the DCI.

The priority can be dynamically changed or controlled by determining the priority of HARQ-ACK for the joint SPS release by using the DL signal (for example, DCI) notifying the joint SPS release.

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

FIG. 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

(base station)
FIG. 9 is a diagram showing an example of the configuration of the base station according to the embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140. The control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The transmission / reception unit 120 may transmit downlink control information (for example, joint SPS release) for releasing a plurality of semi-persistent scheduling (SPS). Further, the transmission / reception unit 120 provides information regarding the priority of HARQ-ACK (for example, at least one of HARQ-ACK for SPS PDSCH and HARQ-ACK for SPS PDSCH release) corresponding to each SPS setting in the joy layer signaling and DCI. At least one may be used for transmission.

The control unit 110 sets the priority of HARQ-ACK corresponding to the downlink control information (for example, joint SPS release) to at least one of the priorities of HARQ-ACK corresponding to a plurality of semi-persistent schedulings or presets. It may be assumed that the determination is based on the priority given.

(User terminal)
FIG. 10 is a diagram showing an example of the configuration of the user terminal according to the embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. The control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Note that the transmission / reception unit 220 may receive downlink control information (for example, joint SPS release) for releasing a plurality of semi-persistent scheduling (SPS). Further, the transmission / reception unit 220 provides information on the priority of HARQ-ACK (for example, at least one of HARQ-ACK for SPS PDSCH and HARQ-ACK for SPS PDSCH release) corresponding to each SPS setting in joylayer signaling and DCI. At least one may be used for reception.

The control unit 210 sets the priority of HARQ-ACK corresponding to the downlink control information (for example, joint SPS release) to at least one of the priorities of HARQ-ACK corresponding to a plurality of semi-persistent schedulings or in advance. Judgment may be made based on the priority given.

For example, the same priority may be set for HARQ-ACK corresponding to each of a plurality of semi-persistent scheduling.

When different priorities are set for HARQ-ACK corresponding to each of the plurality of semi-persistent schedulings (or when different priority settings are supported or allowed), the control unit 210 provides downlink control information. It may be determined that the priority of HARQ-ACK corresponding to is a specific priority.

When different priorities are set for HARQ-ACK corresponding to each of the plurality of semi-persistent schedulings (or when different priority settings are supported or allowed), the control unit 210 sets each priority. The priority of HARQ-ACK corresponding to the downlink control information may be determined based on the number of corresponding semi-persistent schedulings.

The control unit 210 sets the semi-persistent scheduling when different priorities are set for HARQ-ACK corresponding to each of the plurality of semi-persistent schedulings (or when different priority settings are supported or allowed). Even if the priority of HARQ-ACK corresponding to a specific semi-persistent scheduling selected based on at least one of the index and periodicity of is determined to be the priority of HARQ-ACK corresponding to downlink control information. Good.

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

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

For example, the base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 11 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment. The base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

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

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

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

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

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

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

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

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

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

Similarly, the user terminal in the present disclosure may be read as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as an amended or modified mode without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for purposes of illustration and does not bring any limiting meaning to the invention according to the present disclosure.

This application is based on Japanese Patent Application No. 2019-190717 filed on October 18, 2019. All of this content is included here.

Claims (6)

1. A receiver that receives downlink control information for releasing multiple Semi-Persistent Scheduling (SPS),
   The priority of the Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) corresponding to the downlink control information is set to at least one of the priorities of the HARQ-ACK corresponding to the plurality of semi-persistent schedulings or a preset priority. A terminal characterized by having a control unit that makes a determination based on a degree.
2. The terminal according to claim 1, wherein the same priority is set for HARQ-ACK corresponding to each of the plurality of semi-persistent scheduling.
3. When different priorities are set for HARQ-ACK corresponding to the plurality of semi-persistent scheduling, the control unit sets the priority of HARQ-ACK corresponding to the downlink control information to a specific priority. The terminal according to claim 1, wherein the terminal is determined to be.
4. When different priorities are set for HARQ-ACK corresponding to each of the plurality of semi-persistent schedulings, the control unit controls the downlink based on the number of semi-persistent schedulings corresponding to each priority. The terminal according to claim 1, wherein the priority of HARQ-ACK corresponding to the information is determined.
5. The control unit was selected based on at least one of the index and periodicity of the semi-persistent scheduling when different priorities were set for the HARQ-ACK corresponding to each of the plurality of semi-persistent schedulings. The terminal according to claim 1, wherein the priority of HARQ-ACK corresponding to the specific semi-persistent scheduling is determined as the priority of HARQ-ACK corresponding to the downlink control information.
6. The process of receiving downlink control information for releasing multiple Semi-Persistent Scheduling (SPS), and
   The priority of the Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) corresponding to the downlink control information is set to at least one of the priorities of the HARQ-ACK corresponding to the plurality of semi-persistent scheduling, or fixedly. A wireless communication method comprising: a process of determining based on a priority.

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