WO2020202565A1 - User terminal and wireless communication method - Google Patents

Abstract

This user terminal is characterized by having: a control unit which, if a second Physical Downlink Shared Channel (PDSCH) is slower than a first PDSCH and a second Hybrid Automatic Repeat reQuest ACKnowledgment (HARQ-ACK) for the second PDSCH is slower than a first HARQ-ACK for the first PDSCH, controls receiving processing of a third PDSCH, wherein the third PDSCH is slower than the second PDSCH and a third HARQ-ACK for the third PDSCH is slower than the second HARQ-ACK; and a receiving unit which decodes the third PDSCH if it is determined that receiving processing of the third PDSCH will be performed. This embodiment of the present disclosure makes it possible to appropriately perform OOO processing.

Description

User terminal and wireless communication method

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

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 future wireless communication systems (for example, NR), the introduction of out-of-order (OOO) processing is being considered. One of the OOO processes is OOO HARQ-ACK for Hybrid Automatic Repeat reQuest ACK knowledge (HARQ-ACK) for the downlink shared channel (Physical Downlink Shared Channel (PDSCH)).

However, in the discussion of NR so far, only OOO HARQ-ACK processing for two PDSCHs has been examined, and control of OOO HARQ-ACK for three or more PDSCHs has not yet been examined. If the control is not clearly defined, appropriate OOO processing cannot be realized, and communication throughput may deteriorate.

Therefore, one of the purposes of the present disclosure is to provide a user terminal and a wireless communication method capable of appropriately performing OOO processing.

The user terminal according to one aspect of the present disclosure has a second PDSCH slower than the first Physical Downlink Shared Channel (PDSCH), and has a second Hybrid Automatic Repeat reQuest ACK knowledgement (HARC-ACK) for the second PDSCH. Controls the reception process of the third PDSCH when is slower than the first HARQ-ACK for the first PDSCH, where the third PDSCH is slower than the second PDSCH and said When it is determined that the third HARQ-ACK for the PDSCH of 3 is slower than the second HARQ-ACK, the control unit and the reception process of the third PDSCH are performed, the third PDSCH It is characterized by having a receiving unit for decoding.

According to one aspect of the present disclosure, OOO processing can be appropriately performed.

FIG. 1 is a diagram showing an example of OOO processing. FIG. 2 is a diagram showing an example of OOO HARQ-ACK relating to three or more PDSCHs. FIG. 3 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 4 is a diagram showing an example of the configuration of the base station according to the embodiment. FIG. 5 is a diagram showing an example of the configuration of the user terminal according to the embodiment. FIG. 6 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.

(processing time)
In the existing Rel-15 NR, the processing time of the downlink shared channel (Physical Downlink Shared Channel (PDSCH)), the processing time of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and the like are defined. The processing time may be read as a preparation time (preparation time), a preparation procedure time (preparation procedure time), a processing procedure time (processing procedure time), or the like.

The processing time of the PDSCH may be the period from the end of the final symbol of the PDSCH that transmits the transport block to the Uplink (UL) symbol. The UE may provide delivery confirmation information (eg, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)) that is valid for the same or subsequent symbols as the UL symbol.

The processing time of the PUSCH is up to the UL symbol after the end of the final symbol of the downlink control channel (Physical Downlink Control Channel (PDCCH)) that transmits the downlink control information (Downlink Control Information (DCI)) that schedules the PUSCH. It may be a period. The UE may transmit the PUSCH with the same or subsequent symbols as the UL symbol.

The PDSCH processing time may be determined based on parameter N ₁ (which may be referred to as PDSCH decoding time), and the PUSCH processing time may be set to parameter N ₂ (which may be referred to as PUSCH preparation time). It may be determined based on.

N ₁ may be determined based on the SCS of the downlink to which the PDSCH is transmitted and the SCS of the UL channel (for example, PUCCH, PUSCH) to which the HARQ-ACK is transmitted. For example, N ₁ may be determined based on the smallest SCS of these SCSs, and may be determined to be 8-20 symbols, for example 8 symbols if the minimum SCS is 15 kHz. N ₁ may be determined to be a 13-24 symbol if additional PDSCH DMRS is set.

N ₂ may be determined based on the downlink SCS to which the PDCCH transmitting the DCI that schedules the PUSCH is transmitted and the SCS of the UL channel to which the PUSCH is transmitted. For example, N ₂ may be determined based on the smallest SCS of these SCSs, and may be determined to be 10-36 symbols, for example 10 symbols if the minimum SCS is 15 kHz.

That is, the processing time (and the parameters related to the processing time (N ₁ , N _2, etc.)) are set according to the values defined by the numerology corresponding to the smallest SCS of the PDCCH / PDSCH and the PUCCH / PUSCH. May be good.

When transmitting the HARQ-ACK corresponding to the PDSCH using the PUSCH, the UE uses the UL symbol after the time (sum time) in which the processing time of the PDSCH and the processing time of the PUSCH are combined, or after that. PUSCH may be transmitted with the symbol of.

In the existing Rel-15 NR, the above-mentioned processing time is classified into two, a processing time for UE capacity 1 (UE capability 1) and a processing time for UE capacity 2 (UE capability 2). The processing time for UE capability 2 is shorter than the processing time for UE capability 1.

For each of PDSCH and PUSCH, the UE uses different UE capability information (for example, the former is the RRC parameter "pdsch-ProcessingType2" and the latter is the RRC parameter "pusch-ProcessingType2") to determine whether to support UE capability 2 (for example, , Base station). The UE capacity X for the PDSCH (or PUSCH) may be referred to as the PDSCH (or PUSCH) processing capacity X.

The base station may decide whether or not the UE performs processing based on the UE capability 2 based on the UE capability information. Information indicating that the base station applies (enables) UE capability 2 for each of PDSCH and PUSCH (for example, the former is the parameter "processingType2Enabled" included in the RRC information element "PDSCH-ServingCellConfig", and the latter is the RRC information. The parameter "processingType2Enabled") included in the element "PUSCH-ServingCellConfig" may be set in the UE using higher layer signaling. The former parameter may be called "Capability2-PDSCH-Processing", and the latter parameter may be called "Capability2-PUSCH-Processing".

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. 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.

Even if the UE supports UE capability 2 and the base station sets the application of UE capability 2, the UE will fall back to UE capability 1 under certain conditions. For example, for PDSCH, if the subcarrier interval is 30 kHz (numerology parameter μ = 1) and the number of scheduled resource blocks exceeds 136, the UE is based on the processing time of UE capability 1. The PDSCH is processed.

On the other hand, the conditions for fallback to UE capability 1 for PUSCH are not defined in the existing Rel-15 NR specifications.

(Out of order processing)
Consider a process of receiving a signal or channel (which may be referred to as a signal / channel) and transmitting / receiving another signal / channel corresponding to the signal / channel. In the case where another second process is started and completed from the start of the first process to the completion, the order of the process start and completion is reversed, so that the order is out of order. It is also called (Out-Of-Order (OOO)) processing. In NR, the introduction of such OOO treatment is being considered.

FIG. 1 is a diagram showing an example of OOO processing. In this example, the first process described above is a process of receiving the first PDSCH (PDSCH # 1) and transmitting the first HARQ-ACK (HARQ-ACK # 1) corresponding to the PDSCH # 1. Corresponds to. The second process described above corresponds to a process of receiving the second PDSCH (PDSCH # 2) and transmitting the second HARQ-ACK (HARQ-ACK # 2) corresponding to the PDSCH # 2.

K1 shown in FIG. 1 is a parameter indicating the transmission timing of the HARQ-ACK corresponding to the received PDSCH, and may be determined based on the DCI that schedules the PDSCH (for example, the timing instruction of the HARQ corresponding to the PDSCH). Field (may be specified by PDSCH-to-HARQ-timing-indicator field).

In this example, the K1 (= 15) between PDSCH # 1 and HARQ-ACK # 1 is considerably larger than the K1 (= 2) between PDSCH # 2 and HARQ-ACK # 2, and the first process and the second process The processing is OOO. Specifically, the HARQ-ACK # 2 related to the PDSCH # 2 received after the PDSCH # 1 is transmitted before the HARQ-ACK # 1 related to the PDSCH # 1.

The OOO process as shown in FIG. 1 may be referred to as OOO PDSCH-HARQ-ACK flow, OOO HARQ-ACK, etc. because the order of PDSCH and the corresponding HARQ-ACK order are reversed.

In general, it is preferable to transmit and receive signals / channels corresponding to the signals / channels in the order in which the signals / channels are received. On the other hand, OOO processing becomes more necessary when a plurality of services (which may be called use cases, communication types, etc.) having different requirements are used.

Use cases of NR include, for example, high speed and large capacity (for example, enhanced Mobile Broad Band (eMBB)), ultra-large number of terminals (for example, massive Machine Type Communication (mMTC)), ultra-high reliability and low latency (for example, Ultra). Reliable and Low Latency Communications (URLLC)) are being considered.

For example, in FIG. 1 described above, a case where PDSCH # 1 is eMBB data and PDSCH # 2 is URLLC data (a case where more important URLLC data interrupts eMBB data) is assumed.

In order to control the occurrence of out-of-order HARQ-ACK, the UE may operate according to at least one of the following policies with respect to the case of FIG. The UE may determine which policy to follow based on higher layer signaling (eg, RRC), physical layer signaling (eg, DCI), or a combination thereof.

In policy 1, the UE always processes the second PDSCH. The UE may or may not drop the process of the first PDSCH. In addition, the drop in the present disclosure may mean not to process, or may mean to terminate the process. For the dropped PDSCH, the UE may or may not generate a NACK as the corresponding HARQ-ACK feedback and may not generate the corresponding HARQ-ACK feedback.

In policy 2, the UE may process both the first PDSCH and the second PDSCH. The UE reports to the base station whether or not both the first PDSCH and the second PDSCH can be processed as the UE capability (UE capability). The base station may apply policy 2 when the UE capability is reported.

In Policy 3, the UE may process both the first PDSCH and the second PDSCH under certain conditions. The UE may report the particular condition as UE capability. The UE may apply the policy 3 when it has a specific UE ability (for example, the ability of carrier aggregation). This is because a UE capable of carrier aggregation can decode a plurality of PDSCHs at the same time.

For example, a UE capable of performing carrier aggregation consisting of two component carriers can process two PDSCHs at the same time by different carriers, so that the same carrier can process two PDSCHs at the same time. If certain conditions are not met, the behavior of the UE may be undefined and may be processed by the first PDSCH or the second PDSCH.

In policy 4, the UE drops the processing of the first PDSCH. The UE may always drop the processing of the first PDSCH, or may drop it when a predetermined condition (for example, scheduling condition) is not satisfied. The scheduling conditions include, for example, the number of RBs, TBS, the number of layers, the interval (offset, gap) between the first PDSCH and the second PDSCH, and the interval (offset) of a plurality of PUCCHs that transmit HARQ-ACK corresponding to each PDSCH. , Gap) and the like.

After decoding the downlink control channel (Physical Downlink Control Channel (PDCCH)) related to the first PDSCH and the second PDSCH, the UE operation (for example, the determination of whether to drop the first PDSCH, regarding the second PDSCH Timing capability) may be determined or fixed.

The UE, when to drop the first PDSCH is minimal PDSCH procedure time for the second PDSCH (PDSCH Processing procedure time) _{(N 1} also known as) a predetermined time (e.g., d symbols (d is an integer) ) May be increased or decreased. The predetermined time may be set in the UE using higher layer signaling or may be determined based on the specific capabilities of the UE.

The processing of the first PDSCH may be dropped by dropping the first PDSCH of the same serving cell, or by dropping one or more PDSCHs of the same cell or different serving cells. You may.

When the UE is capable of supporting out-of-order HARQ-ACK (out-of-order HARQ-ACK can be applied), the active BWP of a predetermined serving cell has a maximum number of out-of-order HARQ-ACK flows (for example, for example). You may expect it to be 1).

Out-of-order HARQ-ACK operation may or may not be tolerated for the PDSCH-to-HARQ-ACK gap that fits the PDSCH processing time (eg, N ₁ ) for a particular capability. May be good.

By the way, in the discussion of NR so far, only OOO HARQ-ACK for two PDSCHs as shown in FIG. 1 has been examined, and the control of OOO HARQ-ACK for three or more PDSCHs has not yet been examined. .. If the control is not clearly defined, appropriate OOO processing cannot be realized, and communication throughput may deteriorate.

Therefore, the present inventors have conceived a method for appropriately performing OOO treatment.

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, "data" may be read as at least one of PDSCH and PUSCH. Further, the UE capabilities 1 and 2 of the present disclosure may be read as UE capabilities 1 and 2 regarding the processing time, respectively.

(Wireless communication method)
Hereinafter, in the description of each embodiment, the case shown in FIG. 2 will be described as an example. FIG. 2 is a diagram showing an example of OOO HARQ-ACK relating to three or more PDSCHs.

In this example, PDSCH is transmitted in the order of PDSCH # 1, # 2, and # 3. Further, regarding HARQ-ACK # 1 corresponding to PDSCH # 1, HARQ-ACK # 2 corresponding to PDSCH # 2, and HARQ-ACK # 3 corresponding to PDSCH # 3, HARQ-ACK # 3, # 2, and # It is scheduled to be transmitted in the order of 1.

In other words, FIG. 2 shows a case where there are a first PDSCH, a second PDSCH, and a third PDSCH in the active BWP of a serving cell, and the HARQ received after the first PDSCH of the HARQ process ID y. The HARQ-ACK associated with the second PDSCH of the process ID x (where x ≠ y) is transmitted prior to the HARQ-ACK of the first PDSCH and of the second PDSCH of the HARQ process ID x. This corresponds to the case where the HARQ-ACK related to the third PDSCH of the HARQ process ID z (here, z ≠ y, z ≠ x) received later is transmitted before the HARQ-ACK of the second PDSCH. ..

In FIG. 2, the processing time for PDSCH # 1 is longer than the processing time for PDSCH # 2, and the processing time for PDSCH # 2 is secured longer than the processing time for PDSCH # 3.

The processing time for a PDSCH is from a predetermined symbol of the PDSCH (for example, the last symbol, the first symbol) to a predetermined symbol of HARQ-ACK corresponding to the PDSCH (for example, the first symbol, the last symbol). May mean time to.

The order of DCIs for scheduling each PDSCH is limited to DCI for PDSCH # 1, DCI for PDSCH # 2, and DCI for PDSCH # 3 in FIG. I can't.

Further, in this example, it is assumed that a plurality of PDSCHs or a plurality of HARQ-ACKs do not overlap in time, but the length of the secured processing time is the longest for PDSCH # 1 and the shortest for PDSCH # 3. The same applies even if there are duplicates as long as the conditions are met.

In the following description, the condition that PDSCH # 2 is slower than PDSCH # 1 and HARQ-ACK # 1 for PDSCH # 1 is not faster than HARQ-ACK # 2 for PDSCH # 2 is Condition 1. May be called.

In the following description, the condition that PDSCH # 3 is slower than PDSCH # 2 and HARQ-ACK # 2 for PDSCH # 2 is not faster than HARQ-ACK # 3 for PDSCH # 3 is Condition 2. May be called.

Note that condition 1 may be read on the condition that the processing time of PDSCH # 2 is shorter than the processing time of PDSCH # 1. Further, the condition 2 may be read on the condition that the processing time of PDSCH # 3 is shorter than the processing time of PDSCH # 2. That is, satisfying both the condition 1 and the condition 2 is transmitted in the order of PDSCH # 1, # 2 and # 3 as shown in FIG. 2, and is transmitted in the order of HARQ-ACK # 3, # 2 and # 1. It does not mean that it is only transmitted, but includes, for example, being transmitted in the order of PDSCH # 1, # 2 and # 3, and being transmitted in the order of HARQ-ACK # 2, # 3 and # 1. It may be.

<First Embodiment>
In the first embodiment, the UE determines whether or not to process the PDSCH related to OOO is possible based on the HARQ-ACK timing.

The UE may perform processing based on at least one of the following (1-1) to (1-4).

(1-1) The UE processes PDSCH # 2 and # 3 when the condition 1 is satisfied and the condition 2 is satisfied.

(1-2) When the UE satisfies the condition 1 and the condition 2, the processing of PDSCH # 2 is dropped and PDSCH # 3 is processed.

(1-3) When the condition 1 is satisfied and the condition 2 is satisfied, the UE does not process PDSCH # 3 and continues the processing of PDSCH # 2.

(1-4) The UE does not expect that condition 1 is satisfied and condition 2 is satisfied (does not expect). In other words, the UE does not assume that if PDSCH # 1 and # 2 satisfying condition 1 are scheduled, the schedule will satisfy condition 2.

The UE may generate each HARQ-ACK even when three OOO HARQ-ACKs (# 1, # 2, # 3) occur. For the PDSCH that dropped the process (for example, PDSCH # 2 in (1-2) above) and the PDSCH that did not process (for example, PDSCH # 3 in (1-3) above), the UE received the corresponding HARQ-ACK feedback. NACK may be generated as, or the corresponding HARQ-ACK feedback may not be generated.

According to the first embodiment described above, OOO HARQ-ACK related to three or more PDSCHs can be appropriately controlled.

<Second embodiment>
In the second embodiment, the UE determines whether or not to process the PDSCH related to OOO is based on the priority of the PDSCH.

The UE may perform processing based on at least one of the following (2-1) to (2-4).

(2-1) When PDSCH # 2 has a higher priority than PDSCH # 1 and satisfies condition 1, and PDSCH # 3 has a higher priority than PDSCH # 2 and satisfies condition 2. Process PDSCH # 2 and # 3.

(2-2) When PDSCH # 2 has a higher priority than PDSCH # 1 and satisfies condition 1, and PDSCH # 3 has a higher priority than PDSCH # 2 and satisfies condition 2. Drop the process of PDSCH # 2 and process PDSCH # 3.

(2-3) When PDSCH # 2 has a higher priority than PDSCH # 1 and satisfies condition 1, and PDSCH # 3 has a higher priority than PDSCH # 2 and satisfies condition 2. PDSCH # 3 is not processed, and PDSCH # 2 processing is continued.

(2-4) When PDSCH # 2 has a higher priority than PDSCH # 1 and condition 1 is satisfied, it is not expected that condition 2 will be satisfied. In other words, the UE is scheduled to satisfy condition 2 if PDSCH # 1 and # 2 satisfying condition 1 are scheduled and PDSCH # 2 has a higher priority than PDSCH # 1. , Condition 2 is satisfied, and PDSCH # 3 is scheduled to have a higher priority than PDSCH # 2).

The UE may generate each HARQ-ACK even when three OOO HARQ-ACKs (# 1, # 2, # 3) occur. For the PDSCH that dropped the process (for example, PDSCH # 2 in (2-2) above) and the PDSCH that did not process (for example, PDSCH # 3 in (2-3) above), the UE received the corresponding HARQ-ACK feedback. NACK may be generated as, or the corresponding HARQ-ACK feedback may not be generated.

[PDSCH priority]
The PDSCH priority described above may indicate at least one of the following:
-Priority of data or information transmitted by the PDSCH,
-Priority of the logical channel (Logical Channel (LCH)) corresponding to the data or information transmitted by the PDSCH,
-Traffic type, service type of the PDSCH or use case applicable to the PDSCH.

The priority of PDSCH may be referred to as the priority regarding OOO processing of PDSCH. The priority of PDSCH may include a priority related only to the possibility of OOO processing, a priority related to processing other than OOO processing, or a priority common to processing other than OOO processing and OOO processing. ..

The PDSCH priority may be determined by the UE based on at least one of the following:
-Transport block size (TBS) of data related to the PDSCH,
The DCI format for scheduling the PDSCH, the fields contained in the DCI and at least one of the DCI-related RNTIs.
-Time length of the PDSCH (duration, for example, number of symbols),
-Use of the PDSCH data (for example, for URLLC, for eMBB, etc.).

The priority of the PDSCH may be indicated by the DCI (eg, DCI format 0_0, 0_1) that schedules the PDSCH. For example, the UE may explicitly specify the priority (priority level) of a given PDSCH by a given field (eg, priority field) of the DCI, or a given field (eg, MCS field, etc.). It may be implicitly specified by a time domain resource allocation field, a PUCCH resource indicator field, a PDSCH-to-HARQ feedback timing indicator field).

The priority of PDSCH may be set by higher layer signaling. For example, the UE may be set to include explicit parameters for a given PDSCH priority (priority level), or implicit parameters (eg, modulation and coding scheme (MCS). )), Scramble ID, DCI RNTI, frequency domain resource, time domain resource) may be set.

According to the second embodiment described above, OOO HARQ-ACK related to three or more PDSCHs can be appropriately controlled.

<Third embodiment>
In the third embodiment, the UE determines whether or not the PDSCH related to OOO can be processed based on the processing capability of the PDSCH.

The UE may perform processing based on at least one of the following (3-1) to (3-4). The processing time for UE capability 3 (UE capability 3) below may be defined as shorter than the processing time for UE capability 2. For example, when compared with the same SCS, the parameter N ₁ for the PDSCH processing capacity 3 may be shorter than the parameter N ₁ for the PDSCH processing capacity 2.

(3-1) In the UE, PDSCH # 2 is related to UE capacity 2, PDSCH # 1 is related to UE capacity 1, condition 1 is satisfied, and PDSCH # 3 is related to UE capacity 2 or 3, and the condition If 2 is satisfied, PDSCH # 2 and # 3 are processed.

(3-2) In the UE, PDSCH # 2 is related to UE capacity 2, PDSCH # 1 is related to UE capacity 1, condition 1 is satisfied, and PDSCH # 3 is related to UE capacity 2 or 3, and the condition When 2 is satisfied, the process of PDSCH # 2 is dropped and PDSCH # 3 is processed.

(3-3) In the UE, PDSCH # 2 is related to UE capacity 2, PDSCH # 1 is related to UE capacity 1, condition 1 is satisfied, and PDSCH # 3 is related to UE capacity 2 or 3. When 2 is satisfied, PDSCH # 3 is not processed and PDSCH # 2 processing is continued.

(3-4) When PDSCH # 2 is related to UE capability 2 and PDSCH # 1 is related to UE capability 1 and condition 1 is satisfied, it is not expected that condition 2 will be satisfied. In other words, if the UE is scheduled for PDSCH # 1 and # 2 satisfying condition 1, the PDSCH # 2 is associated with UE capability 2, and the PDSCH # 1 is associated with UE capability 1, condition 2 is met. It is not assumed that a schedule will be met (or condition 2 will be met and PDSCH # 3 will be scheduled for UE capability 2 or 3).

Note that the UE capacities 1, 2 and 3 of (3-1) to (3-4) above may be read as different UE capacities X, Y and Z, respectively. It is preferable that the PDSCH processing time corresponding to the UE capacity X ≦ the PDSCH processing time corresponding to the UE capacity Y ≦ the PDSCH processing time corresponding to the UE capacity Z, but the present invention is not limited to this.

The UE may generate each HARQ-ACK even when three OOO HARQ-ACKs (# 1, # 2, # 3) occur. For the PDSCH that dropped the process (for example, PDSCH # 2 in (3-2) above) and the PDSCH that did not process (for example, PDSCH # 3 in (3-3) above), the UE received the corresponding HARQ-ACK feedback. NACK may be generated as, or the corresponding HARQ-ACK feedback may not be generated.

For each of PDSCH and PUSCH, the UE uses different UE capability information (for example, the former is the RRC parameter "pdsch-ProcessingType3" and the latter is the RRC parameter "pusch-ProcessingType3") to determine whether to support UE capability 3 (for example, , Base station).

The base station may decide whether or not the UE performs processing based on the UE capability 3 based on the UE capability information. Information indicating that the base station applies (enables) UE capability 3 for each of PDSCH and PUSCH (for example, the former is the parameter "processingType3Enabled" included in the RRC information element "PDSCH-ServingCellConfig", and the latter is the RRC information. The parameter "processingType3Enabled") included in the element "PUSCH-ServingCellConfig" may be set in the UE using higher layer signaling. The former parameter may be called "Capability3-PDSCH-Processing", and the latter parameter may be called "Capability3-PUSCH-Processing".

Note that when the UE supports UE capability 3, it may be assumed that UE capability 2 is also supported. Further, when the information indicating that the UE capability 3 is applied (enabled) is set for the PDSCH (or PUSCH), the UE applies (validates) the UE capability 2 for the PDSCH (or PUSCH). ) It may be assumed that the information indicating that is also set. According to this configuration, when the UE capability 3 is provided, the amount of information for reporting the UE capability can be reduced.

According to the third embodiment described above, OOO HARQ-ACK related to three or more PDSCHs can be appropriately controlled.

<Others>
In each of the above-described embodiments (for example, in (1-1) to (1-4)), {PDSCH # 2, PDSCH # 3} is {PDSCH # 1, PDSCH # 2}, {PDSCH # 1 , PDSCH # 3}, etc. may be read as at least one.

In addition, the UE is based on any of the above (1-1) to (1-4), the above (2-1) to (2-4), the above (3-1) to (3-4), and the like. May be determined based on the capability of the UE, or may be determined based on the information notified from the base station.

For example, the UE performs at least one of the above processes (1-1) to (1-4), the above (2-1) to (2-4), and the above (3-1) to (3-4). If you have the ability to indicate support, you may report information about that ability to the network (base station).

The base station tells the UE that has reported the information about the capability from (1-1) to (1-4), (2-1) to (2-4), and (3-1) above. Information indicating that at least one of the processes (3-4) is applied (enabled) may be set in the UE by using upper layer signaling or the like.

Information indicating that these capabilities or processes are enabled may be defined for each predetermined unit. Here, the predetermined unit may be at least one such as a component carrier (Component Carrier (CC)), a UE, a frequency range (Frequency Range (FR)), and a cell group (Cell Group (CG)). ..

The ability may be defined as an explicit ability. On the other hand, the ability may be defined in relation to other abilities. For example, the capability may be defined in combination with other capabilities related to URLLC operations, such as the ability of the UE to support a separate HARQ-ACK codebook.

(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. 3 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 a dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and a dual connectivity between NR and LTE (NR-E). -UTRA Dual Connectivity (NE-DC)) may be included.

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

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

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

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

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

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

The plurality of base stations 10 may be connected by wire (for example, 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 host 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. In addition, Master Information Block (MIB) may be transmitted by PBCH.

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

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

A control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect the PDCCH. CORESET corresponds to a resource for searching 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 for establishing a connection with the cell.

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

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

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

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

(base station)
FIG. 4 is a diagram showing an example of the configuration of the base station according to the embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140. The control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.

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

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

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

The transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common 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, the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer for data, control information, etc. acquired from the control unit 110 (for example,). RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

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

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

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

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

Note that the transmission / reception unit 120 may receive capability information related to OOO processing from the user terminal 20. The transmission / reception unit 120 may transmit the setting information for enabling the OOO processing to the user terminal 20.

(User terminal)
FIG. 5 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 transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on 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, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.

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

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

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

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

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

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

In the control unit 210, the second PDSCH is slower than the first Physical Downlink Shared Channel (PDSCH), and the second Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) for the second PDSCH is the first. The process relating to the third PDSCH may be controlled when it is slower than the first HARQ-ACK for the PDSCH, where the third PDSCH is slower than the second PDSCH and the third PDSCH. The third HARQ-ACK for PDSCH is slower than the second HARQ-ACK. The process related to the third PDSCH may include a process of receiving the third PDSCH, or may include a process of generating or transmitting a third HARQ-ACK.

In other words, the control unit 210 applies out-of-order (OOO) processing with respect to the processing of the first, second, and third PDSCHs (or data) when there are first, second, and third PDSCHs. You may control whether or not.

The transmission / reception unit 220 may decode the third PDSCH when it is determined to perform the reception process of the third PDSCH. When it is determined that the transmission / reception unit 220 does not perform the reception process of the third PDSCH (for example, drop or skip), the transmission / reception unit 220 does not have to decode the third PDSCH. The transmission / reception unit 220 may transmit at least one of the first HARQ-ACK, the second HARQ-ACK, and the third HARQ-ACK to the base station 10.

The control unit 210 determines whether or not to perform the reception process of the third PDSCH based on the timings of the first HARQ-ACK, the second HARQ-ACK, and the third HARQ-ACK. You may.

The control unit 210 may determine whether or not to perform the reception process of the third PDSCH based on the priorities of the first PDSCH, the second PDSCH, and the third PDSCH.

Even if the control unit 210 determines whether or not to perform the reception processing of the third PDSCH, based on each processing capacity related to the first PDSCH, the second PDSCH, and the third PDSCH. 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 using two or more physically or logically separated devices). , 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. 6 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, registers, and the like. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), and the like may be realized by the processor 1001.

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

The memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (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, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, hard disk drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of. The storage 1003 may be referred to as an auxiliary storage device.

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

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

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

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

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

The wireless frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe. Further, the subframe may be composed of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that does not depend on 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 (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.

The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be called a sub slot. A minislot may consist of a smaller number of symbols than the slot. A PDSCH (or PUSCH) transmitted in a time unit 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 neurology, 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 numerology in a carrier. May be good. Here, the common RB may be specified by an 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.

Further, 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 may be voltage, current, 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 another device.

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

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, 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. "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 (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

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

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

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

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. 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)), LTE 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, choosing, establishing, comparing, and the like. May be good. That is, "judgment (decision)" may be regarded as "judgment (decision)" of some action.

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

The "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 in this disclosure, are any direct or indirect connections or connections 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 a modified or modified mode without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for purposes of illustration and does not bring any limiting meaning to the invention according to the present disclosure.

Claims (5)

1. The second PDSCH is slower than the first Physical Downlink Shared Channel (PDSCH), and the second Hybrid Automatic Repeat reQuest ACKnowledgement (HARC-ACK) for the second PDSCH is the first for the first PDSCH. Controls the reception process of the third PDSCH when it is slower than the HARQ-ACK of the above, where the third PDSCH is slower than the second PDSCH and the third HARQ-for the third PDSCH. The control unit, whose ACK is slower than the second HARQ-ACK,
   A user terminal characterized by having a receiving unit for decoding the third PDSCH when it is determined to perform the reception process of the third PDSCH.
2. The control unit determines whether or not to perform the reception process of the third PDSCH based on the timings of the first HARQ-ACK, the second HARQ-ACK, and the third HARQ-ACK. The user terminal according to claim 1, wherein the user terminal is characterized by the above.
3. The control unit is characterized in that it determines whether or not to perform the reception process of the third PDSCH based on the priorities of the first PDSCH, the second PDSCH, and the third PDSCH. The user terminal according to claim 1.
4. The control unit determines whether or not to perform the reception process of the third PDSCH based on each processing capacity related to the first PDSCH, the second PDSCH, and the third PDSCH. The user terminal according to claim 1.
5. The second PDSCH is slower than the first Physical Downlink Shared Channel (PDSCH), and the second Hybrid Automatic Repeat reQuest ACKnowledgement (HARC-ACK) for the second PDSCH is the first for the first PDSCH. Controls the reception process of the third PDSCH when it is slower than the HARQ-ACK of the above, where the third PDSCH is slower than the second PDSCH and the third HARQ-for the third PDSCH. ACK is slower than the second HARQ-ACK, step and
   A method for wireless communication of a user terminal, which comprises a step of decoding the third PDSCH when it is determined to perform the reception process of the third PDSCH.

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