JP2023182861A - Terminal and base station - Google Patents

Abstract

To provide a technology that enables a terminal which has received data to appropriately transmit feedback information for data reception to a base station.SOLUTION: A terminal comprises: a reception unit that receives bit map information indicating one or more uplink resource regions which can transmit feedback information for data received from a base station; a control unit that, on the basis of the bit map information, defers the transmission of the feedback information until a time position where an effective uplink resource for transmitting the feedback information exists; and a transmission unit that transmits the feedback information with the effective uplink resource.SELECTED DRAWING: Figure 8

Description

The present invention relates to terminals and base stations in wireless communication systems.

In 3GPP (3rd Generation Partnership Project), in order to further increase system capacity, further increase data transmission speed, further reduce delay in wireless sections, etc., 5G or NR (New Radio) is being developed. Studies are progressing on a wireless communication system called "NR" (hereinafter referred to as "NR"). In 5G, various wireless technologies and network architectures are being studied in order to meet the requirements of achieving a throughput of 10 Gbps or more while reducing the delay in the wireless section to 1 ms or less.

In addition, NR specifies downlink SPS (Semi-Persistent Scheduling) in which PDSCH resources are set in advance in the terminal and activation/release is performed by DCI, which makes it possible to receive data with low delay. (For example, Non-Patent Documents 1 and 2).

3GPP TS 38.213 V16.3.0 (2020-09) 3GPP TS 38.331 V16.2.0 (2020-09)

If a UL slot is placed after multiple consecutive DL slots, the terminal may transmit multiple HARQ-ACKs corresponding to reception of multiple data in the UL slot after the DL slot. If the payload load (density of information included in the payload) of HARQ-ACK is high, the reliability of HARQ-ACK may decrease.

Furthermore, in the case of postponing HARQ-ACK transmission, the next first available PUCCH resource is selected autonomously by the terminal without being instructed by the base station. Collisions between the transmission of HARQ-ACK and the deferred transmission of HARQ-ACK by other terminals may occur.

When using UL cancellation indication (CI) to avoid collisions between the transmission of a deferred HARQ-ACK by one terminal and the transmission of a deferred HARQ-ACK by another terminal, The deferred HARQ-ACK transmission will be dropped rather than being further deferred. That is, it is not intended to use UL CI to avoid collisions between the transmission of a deferred HARQ-ACK by one terminal and the transmission of a deferred HARQ-ACK by another terminal. .

The present invention has been made in view of the above points, and an object of the present invention is to provide a technique that allows a terminal that has received data to appropriately transmit feedback information regarding data reception to a base station.

According to the disclosed technology, a receiving unit that receives bitmap information indicating one or more uplink resource areas in which feedback information regarding data received from a base station can be transmitted;
a control unit that postpones the transmission of the feedback information until a time position where there is a valid uplink resource for transmitting the feedback information based on the bitmap information;
a transmitter configured to transmit the feedback information on the available uplink resources;
A terminal is provided.

According to the disclosed technology, a technology is provided that allows a terminal that has received data to appropriately transmit feedback information regarding data reception to a base station.

FIG. 1 is a diagram for explaining a wireless communication system in an embodiment of the present invention. FIG. 1 is a diagram for explaining a wireless communication system in an embodiment of the present invention. FIG. 1 is a diagram for explaining the basic operation of a wireless communication system in an embodiment of the present invention. FIG. 3 is a diagram illustrating an example of SPS HARQ-ACK. FIG. 4 is a diagram illustrating an example of a case where the reliability of HARQ-ACK may decrease. FIG. 3 illustrates an example of a collision between a deferred HARQ-ACK transmission by one terminal and a deferred HARQ-ACK transmission by another terminal; It is a figure which shows the example when using UL cancellation indication (CI). FIG. 3 is a diagram illustrating an example of an applicable resource area pattern. FIG. 3 is a diagram showing an example in which resources included in a specific time domain and a specific bandwidth are divided into X×Y resource domains. FIG. 3 is a diagram illustrating an example in which resources included in a specific time domain and a specific bandwidth are divided into Z resource domains. FIG. 3 is a diagram showing an example of SPS-Config. FIG. 3 is a diagram showing an example of PDSCH-Config. 1 is a diagram showing an example of a functional configuration of a base station 10 in an embodiment of the present invention. It is a diagram showing an example of a functional configuration of a terminal 20 in an embodiment of the present invention. FIG. 2 is a diagram showing an example of the hardware configuration of a base station 10 or a terminal 20 in an embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

Existing technology may be used as appropriate for the operation of the wireless communication system according to the embodiment of the present invention. The existing technology is, for example, existing NR or LTE, but is not limited to existing NR or LTE.

(System configuration)
FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. A wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20, as shown in FIG. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is just an example, and there may be a plurality of each.

The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a radio signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Further, a TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.

The base station 10 can perform carrier aggregation in which a plurality of cells (a plurality of CCs (component carriers)) are bundled to communicate with the terminal 20. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used.

The base station 10 transmits a synchronization signal, system information, etc. to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. System information is transmitted, for example, on NR-PBCH or PDSCH, and is also referred to as broadcast information. As shown in FIG. 1, the base station 10 transmits a control signal or data to the terminal 20 via DL (Downlink), and receives the control signal or data from the terminal 20 via UL (Uplink). Note that here, what is transmitted on control channels such as PUCCH and PDCCH is called a control signal, and what is transmitted on shared channels such as PUSCH and PDSCH is called data. It is.

The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 via DL, and transmits control signals or data to the base station 10 via UL, thereby receiving various types of information provided by the wireless communication system. Use communication services. Note that the terminal 20 may be called a UE, and the base station 10 may be called a gNB.

The terminal 20 can perform carrier aggregation in which a plurality of cells (a plurality of CCs (component carriers)) are bundled to communicate with the base station 10. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used. Also, a PUCCH-SCell with PUCCH may be used.

FIG. 2 shows a configuration example of a wireless communication system when DC (dual connectivity) is implemented. As shown in FIG. 2, a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided. Base station 10A and base station 10B are each connected to a core network. Terminal 20 can communicate with both base station 10A and base station 10B.

A cell group provided by the base station 10A, which is an MN, is called an MCG (Master Cell Group), and a cell group provided by the base station 10B, which is an SN, is called an SCG (Secondary Cell Group). Furthermore, in the DC, the MCG is composed of one PCell and one or more SCells, and the SCG is composed of one PSCell (Primary SCell) and one or more SCells.

The processing operations in this embodiment may be executed with the system configuration shown in FIG. 1, with the system configuration shown in FIG. 2, or with a system configuration other than these.

(Basic operation example)
With reference to FIG. 3, a basic operational example of the communication system according to the embodiment of the present invention will be described. This operation is basically common to Examples 1 to 10, which will be described later.

In S101, the base station 10 transmits downlink SPS configuration information, PUCCH resource configuration information, slot format configuration information, etc. to the terminal 20 by RRC signaling, and the terminal 20 receives these configuration information. Note that since this embodiment is directed to downlink SPS, "SPS" hereinafter means downlink SPS.

The configuration information of the slot format is, for example, tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, and this configuration information allows the TDD configuration of each symbol of each slot in one or more slots to be DL, UL, It is set whether it is flexible or not. Hereinafter, this configuration information will be referred to as semi-static TDD configuration information. Also, flexible may be written as F. The terminal 20 basically determines the DL/UL/F of each symbol of each slot according to the semi-static TDD setting information.

Further, as the setting information in S101, a plurality of slot format candidates may be notified to enable dynamic switching of slot formats. This setting information is, for example, SlotFormatCombinationsPerCell. Since this information is information consisting of a slot format (SF) ID, it will be referred to as SFI setting information hereinafter.

In S102, the terminal 20 receives a DCI that activates the SPS settings from the base station 10, and in S103 receives data using the PDSCH resource according to the SPS settings. In S104, the terminal 20 transmits SPS HARQ-ACK to the base station 10 using the PUCCH resource (or the PUSCH resource if there is UL scheduling) in the slot at the time position specified by the DCI. Note that SPS HARQ-ACK is sometimes referred to as HARQ-ACK. Furthermore, HARQ-ACK may be called HARQ information, feedback information, or the like.

The terminal 20 may receive a DCI that dynamically specifies the slot format from the base station 10 at or before S102. This DCI is control information that specifies the ID to be actually used among the plurality of slot format IDs set in the SFI setting information. When the slot format is specified by this DCI, the terminal 20 determines the DL/UL/F of each symbol of each slot according to the slot format instead of the semi-static TDD setting information. This DCI information is called dynamic SFI designation information (or dynamic SFI, or SFI).

(About the assignment)
As described above, each time the terminal 20 receives data by SPS, the activation DCI specifies the time position (slot) at which the terminal 20 transmits HARQ-ACK using the PUCCH resource.

However, especially when multiple short-cycle SPSs are configured in the terminal 20, TDD DL/UL configuration in a slot at a specified time position (configuration based on semi-static TDD configuration information or dynamic SFI specification information) In some cases, the symbol position where the PUCCH resource is set may collide with the DL symbol or the F symbol, making it impossible to transmit HARQ-ACK.

When a PUCCH resource collides with a DL symbol or an F symbol, it is possible to drop HARQ-ACK, but dropping HARQ-ACK requires retransmission of PDSCH. Therefore, dropping HARQ-ACK increases the delay, which is undesirable.

(Summary of embodiment)
FIG. 4 shows an example of a collision as described above. In the example of FIG. 4, the third slot from the slot immediately after the slot in which the PDSCH is received is designated as a slot for HARQ-ACK transmission. ACK is dropped.

In this embodiment, it is possible to avoid dropping HARQ-ACK due to collision between PUCCH resources and DL symbols/F symbols.

Specifically, for example, as shown in FIG. 4, when the terminal 20 determines that a collision between the PUCCH resource and the DL symbol/F symbol will occur, the terminal 20 postpones HARQ until the next available UL resource. - Send an ACK.

(Detailed issues related to embodiment)
At the 3GPP meeting, R. It has been agreed that 17 enhancements will be made.

Candidates A to G below can be considered as enhancement methods to avoid dropping SPS HARQ-ACK due to collision of PUCCH with at least one "DL or F symbol".

Candidate A: The terminal 20 postpones HARQ-ACK until the first available valid PUCCH resource.

Candidate B: The terminal 20 selects the first applicable K1 value from the set of configured K1 values to enable HARQ-ACK load balancing.

Candidate C: The base station 10 dynamically notifies the terminal 20 of one or more transmission opportunities for postponed HARQ-ACK.

Candidate D: The base station 10 notifies the terminal 20 of the K1 value of each SPS transmission within the time window set by RRC.

Candidate E: Supports one-shot HARQ-ACK requests (ie, Type 3 HARQ-ACK Codebook) for a group of SPS HARQ processes.

Candidate F: Supports non-numeric values (ie, Non Numerical K1) for DL SPS operations in the licensed spectrum.

Candidate G: Autonomously retransmit HARQ-ACK or multiplex dropped HARQ-ACK information with another HARQ-ACK information.

Regarding at least Candidate A and Candidate B, the terminal 20 needs to determine whether a collision between HARQ-ACK and "DL symbol or F symbol" will occur by applying the K1 value specified in the activation DCI. Since the HARQ-ACK is transmitted on the first available valid PUCCH resource, the terminal 20 also needs to determine the validity of the PUCCH resource.

However, in the existing technology, the exact meaning of "DL symbol or F symbol" is unclear. In other words, it is unclear for the terminal 20 how to determine whether the PUCCH resource is valid. This will be referred to as "Problem 1."

Hereinafter, the DL, UL, and F set by the semi-static TDD setting information will be referred to as semi-static DL, semi-static UL, and semi-static F, respectively. Further, DL, UL, and F designated by the dynamic SFI designation information will be described as dynamic DL, dynamic UL, and dynamic F, respectively. Further, UL set by scheduling is referred to as dynamic UL scheduling or the like.

Hereinafter, an example of determining the validity of PUCCH regarding the above-mentioned "DL symbol or F symbol" will be explained in more detail by case.

(1) When there is no dynamic UL scheduling on semi-static F symbol <1-1: When SFI is not set>
If SFI is not configured (if there is no configuration in SFI configuration information), there is a possibility of SSB/CORESET#0 configuration or dynamic DL scheduling, so if PUCCH can be transmitted in semi-static F symbol, It may not be possible.

That is, if SSB/CORESET #0 reception is set for the symbol, or if DL reception by DCI is scheduled for the symbol, the PUCCH in the symbol is invalid and the PUCCH is dropped. In other cases, the PUCCH resource in the symbol is valid.

<1-2: When SFI is set>
When SFI is configured, even if the base station 10 instructs the semi-static F symbol as a dynamic UL, there is a possibility that the terminal 20 will not receive the dynamic SFI (because there is a possibility of SFI missing). , PUCCH may or may not be transmitted. That is, when the terminal 20 detects SFI, the symbol is valid for PUCCH. If the terminal 20 cannot detect the SFI, the symbol is invalid for the PUCCH, and the PUCCH is dropped.

If the base station 10 indicates semi-static F symbols as dynamic DL, PUCCH is dropped. If the base station 10 indicates a semi-static F symbol as a dynamic F, the PUCCH is dropped.

(2) When there is dynamic UL scheduling on a semi-static F symbol The symbol is always valid for PUCCH, regardless of the presence or absence of SFI setting. Note that when SFI is set, it is not assumed that dynamic DL is set for the symbol.

<About detailed assignments>
Regarding Ultra-Reliable and Low Latency Communication (URLLC) of Release 16 of 3GPP, when one or more short-cycle downlink Semi-Persistent Scheduling (SPS) settings are performed for the terminal 20, in the activation DCI , since a single HARQ-ACK feedback timing value is indicated, multiple Physical Uplink Control Channels for SPS Hybrid Automatic Repeat Request (HARQ) transmission can be used, especially when downlink communication is congested. Conflicts between (PUCCH) resources and slot formats specified by quasi-static time division multiplexing configurations or dynamic slot format identifiers (SFIs) may occur.

When reusing the New Radio (NR) Release 15 mechanism for multiple SPS configurations, physical downloads associated with dropping colliding HARQ-ACK transmissions (transmission of HARQ acknowledgment information) It is assumed that retransmission of the Shared Channel (PDSCH) will be performed.

3GPP meeting avoids dropping SPS HARQ-ACK in case of TDD due to PUCCH collision (e.g. collision between downlink (DL) or flexible symbol (F) and resource transmitting PUCCH) It is envisaged that an extension of Release 17 will be made in order to do so.

(Assignment 1)
When the payload load of HARQ-ACK (density of information included in the payload) is high, the reliability of HARQ-ACK may decrease.

FIG. 5 is a diagram illustrating an example of a case where the reliability of HARQ-ACK may deteriorate. In the example of FIG. 5, five consecutive DL slots are set in the time domain, followed by two UL slots.

Regarding SPS PDSCH1 in the first DL slot in the time domain in the example of FIG. 5, the terminal 20 attempts to transmit HARQ-ACK in the second slot from the beginning in the time domain based on the K1 value. Since the second slot is a DL slot, the terminal 20 postpones the transmission of HARQ-ACK until the next available first UL slot, which is the sixth slot from the first in the time domain.

Similarly, the terminal 20 postpones the transmission of HARQ-ACK for SPS PDSCH3 and SPS PDSCH5, shown in the example of FIG. 5, until the sixth slot from the first in the time domain.

Furthermore, the terminal 20 transmits SPS PDSCH 2, SPS PDSCH 4, and SPS PDSCH 6 in the sixth slot from the beginning in the time domain based on the K1 value.

As a result, in the example of FIG. 5, the payload load of HARQ-ACK transmitted in the UL resource, which is the sixth slot from the first in the time domain, becomes high, which may reduce the reliability of HARQ-ACK. .

(Assignment 2)
The PUCCH load of the first available UL slot/subslot after one DL slot/subslot or a plurality of consecutive DL slots/subslots is such that the plurality of terminals 20 transmit the deferred HARQ-ACK to the corresponding It can be high because there is a possibility of transmitting in the first available UL slot/subslot.

(Assignment 3)
In the case of postponing the transmission of SPS HARQ-ACK, the next first available PUCCH resource is selected autonomously by the terminal 20 without being instructed by the base station 10. , a collision between the transmission of the deferred HARQ-ACK and the transmission of the deferred HARQ-ACK by another terminal 20 may occur (if HARQ-ACK for dynamic PDSCH and SPS HARQ are not multiplexed) , or multiplexing SPS HARQ with other PUCCHs or PUSCHs).

FIG. 6 is a diagram illustrating an example of a collision between a postponed transmission of HARQ-ACK by one terminal 20 and a postponed transmission of HARQ-ACK by another terminal 20.

In the example of FIG. 6, in the time domain, the first slot to the fifth slot in the time direction are set as DL slots. In the time direction, the first to sixth slots are set as UL slots.

In the first slot in the time direction, the terminal 20#1 receives the SPS PDSCH. Based on the K1 value, the terminal 20#1 attempts to transmit HARQ-ACK regarding reception of the SPS PDSCH in the first to third slots in the time direction. However, in the time direction, the first to third slots are DL slots. Therefore, the terminal 20#1 postpones the transmission of HARQ-ACK until the first available UL slot after the DL slot. In the example of FIG. 6, the terminal 20#1 transmits HARQ-ACK in the sixth slot from the first slot in the time direction.

Furthermore, in the slot following the first slot in the time direction, the terminal 20#2 receives the SPS PDSCH. Based on the K1 value, the terminal 20#2 attempts to transmit HARQ-ACK regarding reception of the SPS PDSCH in the first to fifth slots in the time direction. However, in the time direction, the first to fifth slots are DL slots. Therefore, the terminal 20#2 postpones the transmission of HARQ-ACK until the first available UL slot after the DL slot. In the example of FIG. 6, the terminal 20#2 transmits HARQ-ACK in the sixth slot from the first slot in the time direction.

As a result, a collision may occur between the transmission of HARQ-ACK by terminal 20#1 and the transmission of HARQ-ACK by terminal 20#2.

FIG. 7 is a diagram showing an example of using UL cancellation indication (CI).

As shown in the example of Figure 7, when using Downlink Control Information (DCI) format 2_4 (UL cancellation indication (CI)), the postponed HARQ-ACK transmission is dropped instead of being further postponed. It turns out. The purpose of the UL CI is to give priority to the URLLC terminal 20 over the eMBB terminal 20. In the case of SPS HARQ, the UL CI is used to avoid collisions between the transmission of a deferred HARQ-ACK by one terminal 20 and the transmission of a deferred HARQ-ACK by another terminal 20. This is not expected.

(Proposal 1)
A pattern of resource regions applicable to the transmission of HARQ-ACK for the SPS PDSCH (hereinafter may be referred to as "applicable resource region pattern") is used to set the time and frequency domain resource regions to the SPS PDSCH. It may be indicated to the terminal 20 whether or not the terminal can be used for transmitting HARQ-ACK for.

SPS HARQ resources (resources for transmitting HARQ-ACK for SPS PDSCH) are available because the symbol direction is UL, and additional conditions for deferring SPS HARQ transmission (transmission of HARQ-ACK for SPS PDSCH) (For example, the max K1 limitation, which states that PUCCH resources exceeding the maximum value of K1 are not valid), the SPS HARQ resource can be used by the terminal 20 to transmit HARQ-ACK for the SPS PDSCH. It may be.

If the SPS HARQ resource according to the SPS HARQ resource pattern overlaps with an inappropriate resource area, the terminal 20 cannot use the SPS HARQ resource for SPS HARQ transmission, and the terminal 20 cannot use the SPS HARQ resource for SPS HARQ transmission. , may be deferred until the next SPS HARQ resource that satisfies the conditions for sending the HARQ-ACK for the SPS PDSCH.

If the SPS HARQ resource according to the SPS HARQ resource pattern does not overlap with an inappropriate resource area, the terminal 20 may use the SPS HARQ resource for SPS HARQ transmission.

If the SPS HARQ resource is invalid because the symbol direction is DL, the terminal 20 is not expected to use the SPS HARQ resource for SPS HARQ transmission. If the SPS HARQ resources are invalid because the symbol direction is DL, the terminal 20 determines whether to further postpone SPS HARQ transmission based on whether the max K1 limitation is satisfied. Good too.

For example, based on the max K1 limitation condition that PUCCH resources that exceed the maximum value of K1 are not valid, the time interval between the resource that received the SPS PDSCH and the next available SPS HARQ resource is set to the maximum value of K1. If the value is not exceeded, the terminal 20 may postpone the transmission of SPS HARQ to the next available SPS HARQ resource, and the terminal 20 may postpone the transmission of SPS HARQ to the next available SPS HARQ resource, and the terminal 20 may postpone the transmission of SPS HARQ to the next available SPS HARQ resource, and The SPS HARQ transmission may be dropped if the time interval between the two times exceeds the maximum value of K1.

The applicable resource region pattern may only operate on SPS HARQ resources. In other words, if the resources for the transmission of deferred SPS HARQ are multiplexed with other PUCCH resources (e.g., if deferred SPS HARQ is transmitted together with dynamic HARQ in dynamic HARQ resources, or if the channel state information If the CSI of the resource and the resource for the postponed SPS HARQ transmission are multiplexed), the applicable resource area pattern is set so as not to affect the transmission of other PUCCH resources. May be set.

FIG. 8 is a diagram illustrating an example of an applicable resource area pattern. In the example of FIG. 8, in the time domain, the first slot to the fifth slot in the time direction are set as DL slots. In the time direction, the 6th and 7th slots from the first slot are set as UL slots.

In the example of FIG. 8, the first to sixth slots in the time direction are the first available UL slots after the DL slots. However, in the first to sixth slots in the time direction, the higher resource regions in the frequency direction are inappropriate resources for SPS HARQ transmission. Therefore, the applicable resource area pattern is a resource area with a lower frequency in the first slot to the sixth slot in the time direction, and a resource area with a lower frequency in the first slot to the seventh slot in the time direction. region and a resource region with a higher frequency. In the example of FIG. 8, the terminal 20 receives the SPS PDSCH in the first slot in the time domain, and determines the reception of the SPS PDSCH in the third slot from the first slot in the time domain based on the K1 value. Attempt to send HARQ-ACK. However, in the time direction, the first to third slots are DL slots. Therefore, the terminal 20 selects a resource area applicable to transmission of HARQ-ACK regarding reception of PS PDSCH based on the applicable resource area pattern, and performs SPS HARQ transmission in the selected resource area. In the example of FIG. 8, the terminal 20 selects a resource region with a lower frequency in the first to seventh slots in the time direction as a resource for performing SPS HARQ transmission.

(Proposal 2)
A bitmap may be used by the base station 10 to indicate to the terminal 20 a resource area pattern applicable to SPS HARQ transmission. For example, one bit may be used to indicate whether one resource region is applicable to SPS HARQ transmission.

(Option 1)
Resources included in a specific time domain and a specific bandwidth may be evenly divided into X×Y resource domains. Here, X is a positive integer indicating the number of resource regions in the time domain, and Y is a positive integer indicating the number of resource regions in the frequency domain.

One indication bit among the X×Y bits included in the bitmap may correspond to each resource among the X×Y resource areas. For example, numbers may be assigned to X×Y resource areas in ascending order of resource positions, and the i-th bit of the X×Y bits included in the bitmap is may correspond to the i-th resource in the ascending order among the resource areas. Note that in the above example, numbers are assigned in ascending order of resource positions, but the present embodiment is not limited to this example. For example, numbers may be assigned in descending order of resource location.

Here, the ascending order of resource regions of X×Y resource regions means that first, one resource region is counted in the time domain, then all resource regions included in the frequency domain are counted, and then resource regions are counted in the time domain. The order may be such that after counting one resource area, all resource areas included in the frequency domain are counted.

FIG. 9 is a diagram showing an example in which resources included in a specific time domain and a specific bandwidth are divided into X (=6)×Y (=2) resource regions. In the example of FIG. 9, resource areas applicable to SPS HARQ transmission are indicated by a bit value of 1, and resources inappropriate for SPS HARQ transmission are indicated by a bit value of 0.

In the example of FIG. 9, the ascending order of resource regions of X×Y resource regions means that first, one resource region is counted in the time domain, then all resource regions are counted in the frequency domain, and then the resource regions are counted in the time domain. The order may be such that after counting one region, all resource regions in the frequency domain are counted. In this case, the bitmap indicating the resource area pattern applicable to SPS HARQ transmission may be 000000011011.

Alternatively, ascending order of resource regions of X×Y resource regions means first counting one resource region in the frequency domain, then counting all the resource regions in the time domain, and then counting the resource regions in the time domain. The order may be such that after counting one resource area, all resource areas in the frequency domain are counted. In this case, the bitmap indicating the resource area pattern applicable to SPS HARQ transmission in the example of FIG. 9 may be 000011000101.

When dividing resources included in a specific time domain and a specific bandwidth into X×Y resource domains equally, the base station 10 uses a dedicated DCI field to determine the value of X and the value of Y. may be notified to the terminal 20. Alternatively, the base station 10 may notify the terminal 20 of the value of X and the value of Y using Radio Resource Control (RRC) signaling (which may be RRC configuration). Alternatively, the values of X and Y may be preset (eg, X=2, Y=1).

When dividing resources included in a specific time domain and a specific bandwidth into X×Y resource regions equally, the base station 10 uses a dedicated DCI field to divide the time domain of each resource region. The terminal 20 may be notified of the resource size and the frequency domain resource size. Alternatively, the base station 10 may notify the terminal 20 of the time domain resource size and frequency domain resource size of each resource area using RRC signaling (which may be RRC configuration). Alternatively, the time-domain resource size and frequency-domain resource size of each resource region may be preset (e.g., N resource blocks (RB) in the frequency domain and 1 slot in the time domain). ).

When dividing resources included in a specific time domain and a specific bandwidth into X×Y resource regions, the base station 10 uses a dedicated DCI field to divide the resources included in the time domain into X×Y resource regions. The terminal 20 may be notified of the starting position and the starting position of the resource region in the frequency domain. Alternatively, the base station 10 may notify the terminal 20 of the start position of the resource region in the time domain and the start position of the resource region in the frequency domain using RRC signaling (which may be RRC configuration). . Alternatively, the starting position of the resource area in the time domain and the starting position of the resource area in the frequency domain may be set in advance (e.g., the second slot is the starting position of the resource area in the time domain, Resource Block (PRB) #0 may be the starting position of the resource region in the frequency domain).

(Option 2)
A bitmap may be used by the base station 10 to indicate to the terminal 20 a resource area pattern applicable to SPS HARQ transmission. For example, one bit may be used to indicate whether one resource region is applicable to SPS HARQ transmission.

Resources included in a specific time domain and a specific bandwidth may be divided into Z resource domains. Here, the time domain resource size and/or frequency domain resource size of one resource region among the Z resource regions is the time domain resource size of another resource region among the Z resource regions. and/or may be different from the frequency domain resource size.

One indication bit among the Z bits included in the bitmap may correspond to each resource among the Z resource areas. For example, Z resource areas may be numbered in ascending order of the resource start position (or resource end position), and the i-th bit of the Z bits included in the bitmap is It may correspond to the i-th resource in the ascending order among the Z resource areas. Note that in the above example, numbers are assigned in ascending order of the resource start position (or resource end position), but the present embodiment is not limited to this example. For example, numbers may be assigned in descending order of resource location.

Here, the ascending order of resource start positions in Z resource areas means that first, one resource start position is counted in the time domain, and then the resource start positions included in the frequency domain corresponding to the resource start position in the time domain are counted. Even if the order is such that all resource start positions are counted, then the next resource start position in the time domain is counted, and then all resource start positions included in the frequency domain corresponding to the resource start position in the time domain are counted. good. The ascending order of the resource end positions of the Z resource areas may be similarly defined.

FIG. 10 is a diagram showing an example in which resources included in a specific time domain and a specific bandwidth are divided into Z (=6) resource regions. In the example of FIG. 10, resource areas applicable to SPS HARQ transmission are indicated by a bit value of 1, and resources inappropriate for SPS HARQ transmission are indicated by a bit value of 0.

In the example of FIG. 10, the ascending order of resource starts in X resource areas means that first, one resource start position is counted in the time domain, and then a resource included in the frequency domain corresponding to the resource start position in the time domain is started. All positions are counted, then the next resource start position in the time domain is counted, and then all resource start positions included in the frequency domain corresponding to the resource start position in the time domain are counted. You can. In this case, the bitmap indicating the resource area pattern applicable to SPS HARQ transmission may be 001011.

Alternatively, the ascending order of resource start positions in Z resource areas means that after first counting one resource start position in the frequency domain, the resource start positions included in the time domain corresponding to the resource start position in the frequency domain are counted. , then count one next resource start position in the frequency domain, and then count all resource start positions included in the time domain corresponding to the resource start position in the frequency domain. Good too. The ascending order of the resource end positions of the Z resource areas may be similarly defined.

In this case, the bitmap indicating the resource area pattern applicable to SPS HARQ transmission in the example of FIG. 10 may be 011010.

Resource allocations may be defined for each resource region. When resource allocation is defined for each area, the resource allocation information includes information indicating the resource size in the time domain and the resource size in the frequency domain, information indicating the start position of the resource in the time domain, and the start position of the resource in the frequency domain. (If there is no gap between two adjacent resource regions, this information may not be included).

When dividing resources included in a specific time domain and a specific bandwidth into Z resource regions, the base station 10 uses a dedicated DCI field to transmit resource allocation information of each resource region to the terminal 20. may be notified. Resource allocation information may be indicated directly in a dedicated DCI field. Alternatively, in a dedicated DCI field, an index indicating the rows of the table may be indicated, and the index indicating the rows of the table may indicate resource allocation information in each row. Alternatively, the base station 10 may notify the terminal 20 of the resource allocation information of each resource area using RRC signaling (which may be RRC configuration). Alternatively, the resource allocation information for each resource area may be set in advance.

The base station 10 may notify the terminal 20 of the applicable resource area pattern of SPS HARQ using a bitmap.

An example of how the base station 10 notifies the terminal 20 of a bitmap will be described below.

(Notification method 1)
The base station 10 may dynamically notify the terminal 20 of the bitmap using DCI.

The DCI format used when the base station 10 dynamically notifies the terminal 20 of a bitmap may be an existing DCI format specific to the terminal 20 (UE-specific) or an existing group-specific (UE-specific) DCI format. group-common) DCI format.

Alternatively, a new DCI field may be defined for the base station 10 to notify the terminal 20 of the bitmap. For example, a new DCI field may be added to the existing terminal 20-specific (UE-specific) DCI format without introducing a new Radio Network Temporary Identifier (RNTI).

Alternatively, a new RNTI may be used to define a new DCI field for bitmap notifications, for example. Alternatively, the base station 10 may communicate the bitmap to the terminal 20 using existing fields of the DCI format. A new field or a combination of specific values of several fields may identify the DCI used for the SPS HARQ applicable resource region pattern.

The DCI format used when the base station 10 dynamically notifies the terminal 20 of a bitmap may be a new UE-specific DCI format, or a new group-specific DCI format. It may be in the DCI format (common).

When a DCI format specific to the terminal 20 (UE-specific) is used as the DCI format used when the base station 10 dynamically notifies the terminal 20 of a bitmap, the bitmap information is used together with the scheduling data. may be sent, or bitmap information may be sent without scheduling data.

When a group-common DCI format is used as the DCI format used when the base station 10 dynamically notifies the terminal 20 of a bitmap, the bitmap is sent together with the conventional notification. A reporting DCI may be sent, or a DCI reporting bitmap may be sent without a traditional notification.

As the contents of the DCI used when the base station 10 dynamically notifies the terminal 20 of a bitmap, a bitmap may be included in a dedicated DCI field, and in this case, the bitmap is directly transmitted to the terminal 20. may be notified.

Alternatively, the base station 10 may configure the bitmap set to the terminal 20 by RRC signaling. In this case, in order to designate any one bitmap in the set of bitmaps to the terminal 20, the base station 10 specifies a bitmap corresponding to the one bitmap in the dedicated DCI field. The index may be notified to the terminal 20. Note that in the above example, the base station 10 specifies one bitmap in the bitmap set to the terminal 20, but the embodiment is not limited to this example. For example, base station 10 may specify two or more bitmaps in a bitmap set to terminal 20.

The DCI format can be used when the base station 10 dynamically notifies the terminal 20 of a bitmap. An example of the correspondence between a bitmap and an SPS PDSCH transmission configuration (hereinafter may be referred to as "SPS configuration") to which the bitmap is applied will be shown below.

One bitmap that the base station 10 notifies the terminal 20 using DCI may be applied to one SPS setting.

For example, for one bitmap that the base station 10 notifies the terminal 20 using DCI, one SPS setting to which the bitmap is applied is specified by the index of the SPS setting included in the new DCI field. or may be specified by an index of the SPS settings contained in an existing DCI field.

Alternatively, for example, for one bitmap that the base station 10 notifies the terminal 20 using DCI, one SPS setting to which the bitmap is applied is received immediately before the notification of the DCI. The SPS settings may be the SPS settings received immediately after the notification of the DCI.

One bitmap that the base station 10 notifies the terminal 20 using DCI may be applied to multiple SPS settings.

For example, for one bitmap that the base station 10 notifies the terminal 20 using DCI, the multiple SPS settings to which the bitmap is applied are the indexes of the multiple SPS settings included in the new DCI field. or may be specified by an index of multiple SPS settings included in an existing DCI field.

For example, for one bitmap that the base station 10 notifies the terminal 20 using DCI, the multiple SPS settings to which the bitmap is applied may be all activated SPS settings. good.

The multiple bitmaps that the base station 10 notifies the terminal 20 using the DCI may be applied to multiple SPS settings.

For example, regarding multiple bitmaps that the base station 10 notifies the terminal 20 using DCI, the multiple SPS settings to which the multiple bitmaps are applied are the multiple SPS settings included in the new DCI field. It may be specified by an index of a setting, or by an index of multiple SPS settings contained in an existing DCI field.

For example, regarding multiple bitmaps that the base station 10 notifies the terminal 20 using DCI, the multiple SPS settings to which the multiple bitmaps are applied are all activated SPS settings. There may be.

The DCI format can be used when the base station 10 dynamically notifies the terminal 20 of a bitmap. Below, examples of conditions under which bitmaps are applied to SPS settings are shown.

(Prerequisite 1 for applying bitmap)
When the base station 10 uses the DCI format to notify the terminal 20 of a bitmap, when the SPS configuration notified by DCI and to which the bitmap is applied is active. , the terminal 20 may apply the bitmap to the active SPS settings.

(Precondition 2 for applying bitmap)
When the base station 10 uses the DCI format to notify the terminal 20 of a bitmap, the HARQ If the postponement is already valid or if the HARQ postponement for the SPS configuration is implicitly valid due to the bitmap notification by the DCI, the terminal 20 applies the bitmap to the SPS configuration. You may.

In the case where the base station 10 uses the DCI format to notify the terminal 20 of the bitmap, the terminal 20, after receiving the DCI notifying the bitmap, if the above-mentioned preconditions 1 and 2 are satisfied. , the bitmap may be applied to the SPS configuration.

The base station 10 can dynamically notify the terminal 20 of the bitmap using the DCI format. The terminal 20 applies the notified bitmap to the SPS settings. Thereafter, the terminal 20 stops applying the bitmap to the SPS settings.

In the case where the bitmap is applied only once to the SPS settings, the terminal 20 stops applying the bitmap to the SPS settings if one or more of the following conditions are met. You can.

1. When the end position (in the time direction and/or frequency direction) of the resource indicated by the bitmap is reached.

2. If the SPS configuration to which the bitmap is applied is released.

3. When the action of postponing HARQ is disabled.

4. If an explicit DCI is received to stop applying bitmaps to SPS settings. In this case, the same DCI format as the DCI that notifies the bitmap may be used as the explicit DCI that stops applying the bitmap to the SPS settings.

5. If another DCI is received announcing a bitmap and the new bitmap is to be used.

The base station 10 can dynamically notify the terminal 20 of the bitmap using the DCI format. The terminal 20 applies the notified bitmap to the SPS settings. Thereafter, the terminal 20 stops applying the bitmap to the SPS settings.

For example, when repeatedly applying a bitmap to SPS settings, the base station 10 may notify the repetition period by DCI, notify it by RRC signaling, or set it in advance. The terminal 20 may repeatedly apply the bitmap to the SPS settings based on the notified repetition period. In this case, the terminal 20 may stop applying the bitmap to the SPS settings when one or more of the following conditions are met.

1. If the SPS configuration to which the bitmap is applied is released.

2. When the action of postponing HARQ is disabled.

3. If an explicit DCI is received to stop applying bitmaps to SPS settings. In this case, the same DCI format as the DCI that notifies the bitmap may be used as the explicit DCI that stops applying the bitmap to the SPS settings.

4. If another DCI is received announcing a bitmap and the new bitmap is to be used.

(Notification method 2)
The base station 10 may configure a bitmap for the terminal 20 using RRC parameters.

For example, a new information element, SPS-Config, may be defined, and the base station 10 may set a bitmap for the terminal 20 by notifying the terminal 20 of the SPS-Config. .

FIG. 11 is a diagram showing an example of SPS-Config. As shown in the example of FIG. 11, "LengthN", which is a parameter that sets the maximum length of the bitmap, may be set in SPS-Config by RRC. Alternatively, “LengthN” may be preset in SPS-Config.

The bitmap configured in the terminal 20 by notifying the terminal 20 of SPS-Config shown in the example of FIG. 11 may be applied only to one SPS configuration. That is, for each SPS configuration, one corresponding bitmap may be applied by SPS-Config.

The base station 10 may configure a bitmap indicating an applicable resource region pattern for the terminal 20 using the RRC parameters. In this case, the terminal 20 may apply the bitmap to the SPS configuration on the precondition that the SPS configuration is activated and HARQ postponement is enabled.

If the above-mentioned preconditions are met and the bitmap is configured by RRC, the terminal 20 may always apply the configured bitmap to the SPS configuration.

If the above-mentioned preconditions are met, the base station 10 may transmit a DCI for activating the configured bitmap to the terminal 20, and the terminal 20 performs RRC based on the received DCI. The configured bitmap may be activated. In this case, one bitmap may be applied to one SPS configuration by the DCI, and multiple bitmaps may be applied to multiple SPS configurations by the DCI.

When activating a bitmap configured in RRC with DCI, a dedicated DCI field may be used to specify the SPS settings to which the bitmap is applied. Furthermore, the same DCI format as the above-described notification method 1 may be used for the DCI that activates the bitmap set in RRC.

After the bitmap configured in RRC is applied to the SPS configuration, the terminal 20 stops applying the bitmap to the SPS configuration if one or more of the following conditions are met. You can.

1. If the SPS configuration to which the bitmap is applied is released.

2. When the action of postponing HARQ is disabled.

3. If an explicit DCI is received to stop applying bitmaps to SPS settings. In this case, the same DCI format as the DCI that notifies the bitmap of notification method 1 described above may be used as the explicit DCI that stops applying the bitmap to the SPS settings.

4. If another DCI is received announcing a bitmap and the new bitmap is to be used.

For example, a new information element, PDSCH-Config, may be defined, and the base station 10 may set a bitmap for the terminal 20 by notifying the terminal 20 of the PDSCH-Config. .

FIG. 12 is a diagram showing an example of PDSCH-Config. As shown in the example of FIG. 12, "LengthN", which is a parameter that sets the maximum length of the bitmap, may be set in PDSCH-Config by RRC. Alternatively, “LengthN” may be preconfigured in PDSCH-Config.

The bitmap configured in the terminal 20 by notifying the terminal 20 of the PDSCH-Config shown in the example of FIG. 12 may be applied to one or more SPS configurations. That is, a common bitmap may be applied by PDSCH-Config to all (activated) SPS configurations.

The base station 10 may configure a bitmap indicating an applicable resource region pattern for the terminal 20 using the RRC parameters. In this case, the terminal 20 may apply the bitmap to the SPS settings on the premise that HARQ postponement is enabled.

If the above-mentioned preconditions are met and the bitmap is configured by RRC, the terminal 20 may always apply the configured bitmap to all activated SPS configurations.

If the above-mentioned preconditions are met, the base station 10 may transmit a DCI for activating the configured bitmap to the terminal 20, and the terminal 20 performs RRC based on the received DCI. The configured bitmap may be activated. In this case, one bitmap may be applied to one or more SPS settings by the DCI.

When activating a bitmap configured in RRC with DCI, a dedicated DCI field may be used to specify the SPS settings to which the bitmap is applied. Furthermore, the same DCI format as the above-described notification method 1 may be used for the DCI that activates the bitmap set in RRC.

After the bitmap configured in RRC is applied to the SPS configuration, the terminal 20 stops applying the bitmap to the SPS configuration if one or more of the following conditions are met. You can.

1. If the SPS configuration to which the bitmap is applied is released.

2. When the action of postponing HARQ is disabled.

3. If an explicit DCI is received to stop applying bitmaps to SPS settings. In this case, the same DCI format as the DCI that notifies the bitmap of notification method 1 described above may be used as the explicit DCI that stops applying the bitmap to the SPS settings.

4. If another DCI is received announcing a bitmap and the new bitmap is to be used.

In the above example, the applicable resource region pattern, which is the pattern of resource regions applicable to the transmission of HARQ-ACK for SPS PDSCH, is used to configure the time and frequency domain resource regions for transmission of HARQ-ACK for SPS PDSCH. A method of indicating to a terminal 20 whether it is available for transmission is described. As a method for the base station 10 to notify the terminal 20 of the applicable resource area pattern, proposed methods include a method of notifying the terminal of a bitmap using DCI, and a method of configuring the bitmap for the terminal using RRC signaling. has been done. Options for using these DCIs and options for using RRC signaling are shown.

Among the above-mentioned options, the option used in the terminal 20 may be set using upper layer parameters. Further, the terminal 20 may notify the base station 10 of information indicating which option can be used among the above-mentioned options as UE capability. Further, which option can be used among the above-mentioned options may be specified in the specifications. Furthermore, the terminal 20 may decide which option to use among the above-mentioned options based on the parameters of the upper layer and the transmitted UE capability.

(About UE capability information)
UE capability indicating whether the terminal 20 supports the following functions in order to avoid dropping SPS HARQ-ACK due to collision between at least one "DL symbol or F symbol" and PUCCH resource in case of TDD scheme. Information may be used. The UE capability information is notified from the terminal 20 to the base station 10, and the base station 10 can notify the terminal 20 of the applicable resource area pattern, for example, based on the UE capability information.

- UE capability information indicating whether or not HARQ-ACK deferral is supported in the case of the TDD scheme.

- UE capability information indicating whether it supports the function of configuring the applicable resource area pattern for HARQ-ACK deferral.

(Device configuration)
Next, an example of the functional configuration of the base station 10 and terminal 20 that execute the processes and operations described above will be described. The base station 10 and the terminal 20 include functions to implement proposals 1 and 2 described above. However, the base station 10 and the terminal 20 may each have only the function of one of proposals 1 to 2.

<Base station 10>
FIG. 13 is a diagram illustrating an example of the functional configuration of the base station 10. As shown in FIG. 13, base station 10 includes a transmitting section 110, a receiving section 120, a setting section 130, and a control section 140. The functional configuration shown in FIG. 13 is only an example. As long as the operations according to the embodiments of the present invention can be executed, the functional divisions and functional parts may have any names. The transmitting section 110 and the receiving section 120 may also be called a communication section.

The transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information on a higher layer from the received signals. Further, the transmitter 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DL data, etc. to the terminal 20. Furthermore, the transmitter 110 transmits the setting information and the like described in Proposals 1 and 2.

The setting unit 130 stores preset setting information and various types of setting information to be transmitted to the terminal 20 in a storage device, and reads them from the storage device as necessary. The control unit 140 performs, for example, resource allocation, overall control of the base station 10, and the like. Note that a functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120. Furthermore, the transmitter 110 and the receiver 120 may be referred to as a transmitter and a receiver, respectively.

<Terminal 20>
FIG. 14 is a diagram showing an example of the functional configuration of the terminal 20. As shown in FIG. 14, the terminal 20 includes a transmitting section 210, a receiving section 220, a setting section 230, and a control section 240. The functional configuration shown in FIG. 14 is only an example. As long as the operations according to the embodiments of the present invention can be executed, the functional divisions and functional parts may have any names. The transmitting section 210 and the receiving section 220 may also be called a communication section.

The transmitter 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and obtains higher layer signals from the received physical layer signals. Further, the transmitter 210 transmits HARQ-ACK, and the receiver 220 receives the configuration information and the like described in Proposals 1 and 2.

The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device, and reads it from the storage device as necessary. The setting unit 230 also stores setting information that is set in advance. The control unit 240 controls the entire terminal 20 and the like. Note that a functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220. Further, the transmitter 210 and the receiver 220 may be called a transmitter and a receiver, respectively.

The terminal 20 and base station 10 are configured as, for example, the terminals and base stations described in the following sections.
(Section 1)
a receiving unit that receives bitmap information indicating one or more uplink resource areas capable of transmitting feedback information for data received from a base station;
a control unit that postpones the transmission of the feedback information until a time position where there is a valid uplink resource for transmitting the feedback information based on the bitmap information;
a transmitter configured to transmit the feedback information on the available uplink resources;
A terminal equipped with
(Section 2)
The bitmap information is such that each resource region among a plurality of resource regions obtained by equally dividing resources of a specific time interval and a specific bandwidth in the time direction and frequency direction transmits the feedback information. indicates whether it can be used for
The terminal described in paragraph 1.
(Section 3)
The control unit sets a plurality of bitmaps based on the parameters received from the base station, and among the set bitmaps, the bitmap specified by the control information received by the reception unit is transmitted to the feedback unit. using the information as bitmap information indicating one or more uplink resource regions in which the information can be transmitted;
The terminal described in paragraph 1.
(Section 4)
the bitmap information indicates one or more uplink resource regions capable of transmitting feedback information for semi-persistent data transmission from the base station;
The terminal described in paragraph 1.
(5th draft)
a receiving unit that receives bitmap information indicating one or more uplink resource areas capable of transmitting feedback information for data received from a base station;
a transmitter that transmits bitmap information indicating one or more uplink resource areas in which the terminal can transmit feedback information in response to the transmitted data;
a control unit that postpones reception of the feedback information until a time position where there is an effective uplink resource for receiving the feedback information based on the bitmap information;
a receiver for receiving the feedback information on the available uplink resources;
A base station equipped with

The configurations described in any of the above sections provide a technique that allows a terminal that has received data to appropriately transmit feedback information regarding data reception to a base station.

(Hardware configuration)
The block diagrams (FIGS. 13 and 14) used to explain the above embodiments show blocks in functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices. The functional block may be realized by combining software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, allocation gning), but these are limited to I can't do it. For example, a functional block (configuration unit) that performs transmission is called a transmitting unit or a transmitter. In either case, as described above, the implementation method is not particularly limited.

For example, the base station 10, terminal 20, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 15 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and terminal 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. Good too.

In addition, in the following description, the word "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.

Each function in the base station 10 and the terminal 20 is performed by loading predetermined software (programs) onto hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls communication by the communication device 1004. This is realized by controlling at least one of reading and writing data in the storage device 1002 and the auxiliary storage device 1003.

The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, the above-described control unit 140, control unit 240, etc. may be implemented by the processor 1001.

Further, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes in accordance with the programs. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, the control unit 140 of the base station 10 shown in FIG. 13 may be realized by a control program stored in the storage device 1002 and operated on the processor 1001. Further, for example, the control unit 240 of the terminal 20 shown in FIG. 14 may be realized by a control program stored in the storage device 1002 and operated on the processor 1001. Although the various processes described above have been described as being executed by one processor 1001, they may be executed by two or more processors 1001 simultaneously or sequentially. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunications line.

The storage device 1002 is a computer-readable recording medium, such as ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), or RAM. (Random Access Memory) etc. may be configured. The storage device 1002 may be called a register, cache, main memory, or the like. The storage device 1002 can store executable programs (program codes), software modules, and the like to implement a communication method according to an embodiment of the present disclosure.

The auxiliary storage device 1003 is a computer-readable recording medium, such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray disk, etc.). -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, etc. Auxiliary storage device 1003 may be called an auxiliary storage device. The above-mentioned storage medium may be, for example, a database including at least one of the storage device 1002 and the auxiliary storage device 1003, a server, or other suitable medium.

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 (FDD) and time division duplex (TDD). It may be composed of. For example, a transmitting/receiving antenna, an amplifier section, a transmitting/receiving section, a transmission path interface, etc. may be realized by the communication device 1004. The transmitting and receiving unit may be physically or logically separated into a transmitting unit and a receiving unit.

The input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that 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 storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses for each device.

The base station 10 and the terminal 20 also include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a programmable logic device (PLD). ), FPGA (Field Programmable Gate Array), and other hardware A part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.

(Supplementary information on the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, modifications, alternatives, replacements, etc. Probably. Although the invention has been explained using specific numerical examples to facilitate understanding of the invention, unless otherwise specified, these numerical values are merely examples, and any appropriate values may be used. The classification of items in the above explanation is not essential to the present invention, and matters described in two or more items may be used in combination as necessary, and matters described in one item may be used in another item. may be applied to the matters described in (unless inconsistent). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. The operations of a plurality of functional sections may be physically performed by one component, or the operations of one functional section may be physically performed by a plurality of components. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as there is no contradiction. Although the base station 10 and the terminal 20 have been described using functional block diagrams for convenience of process description, such devices may be implemented in hardware, software, or a combination thereof. Software operated by the processor included in the base station 10 according to the embodiment of the present invention and software operated by the processor included in the terminal 20 according to the embodiment of the present invention are respectively random access memory (RAM), flash memory, and read-only memory. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

Further, the notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods. For example, the information notification may be performed using physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), or upper layer signaling (e.g., RRC (Radio Resource Control) signaling). , MAC (Medium Access Control) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. RRC signaling may also be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, or the like.

Each aspect/embodiment described in this disclosure is applicable to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system). m), 5G (5th generation mobile communication System), FRA (FUTURE RADIO ACCESS), NR (New Radio), W -CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (ULTRA MOBILE BROADBAND), IEE 82 . 11 (Wi -Fi (registered trademark) )), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems and systems that are extended based on these. It may be applied to at least one next generation system. Furthermore, a combination of a plurality of systems may be applied (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this specification may be changed as long as there is no contradiction. For example, the methods described in this disclosure use an example order to present elements of the various steps and are not limited to the particular order presented.

In this specification, specific operations performed by the base station 10 may be performed by its upper node in some cases. In a network consisting of one or more network nodes including a base station 10, various operations performed for communication with a terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 ( It is clear that this can be done by at least one of the following: for example, MME or S-GW (possible, but not limited to). Although the case where there is one network node other than the base station 10 is illustrated above, the other network node may be a combination of multiple other network nodes (for example, MME and S-GW). .

The information, signals, etc. described in this disclosure may be output from an upper layer (or lower layer) to a lower layer (or upper layer). It may be input/output via multiple network nodes.

The input/output information may be stored in a specific location (eg, memory) or may be managed using a management table. Information etc. to be input/output may be overwritten, updated, or additionally written. The output information etc. may be deleted. The input information etc. may be transmitted to other devices.

The determination in the present disclosure may be performed based on a value represented by 1 bit (0 or 1), a truth value (Boolean: true or false), or a comparison of numerical values (e.g. , comparison with a predetermined value).

Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.

Additionally, software, instructions, information, etc. may be sent and received via a transmission medium. For example, the software may use wired (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and/or wireless technologies (infrared, microwave, etc.) to access a website, When transmitted from a server or other remote source, these wired and/or wireless technologies are included within the definition of transmission medium.

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

Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and the symbol may be a signal. Also, the signal may be a message. Further, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, or the like.

As used in this disclosure, the terms "system" and "network" are used interchangeably.

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

The names used for the parameters described above are not restrictive in any respect. Furthermore, the mathematical formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (e.g. PUSCH, 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. It's not a proper name.

In this disclosure, "Base Station (BS)," "wireless base station," "base station," "fixed station," "NodeB," "eNodeB (eNB)," and "gNodeB ( gNB)", "access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", " Terms such as "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.

A base station can accommodate one or more (eg, three) cells. If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is divided into multiple subsystems (e.g., small indoor base stations (RRHs)). The term "cell" or "sector" refers to a part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage. refers to

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

A mobile station is defined by a person skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, terminal , wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like. The moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (manned or unmanned). ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

Furthermore, the base station in the present disclosure may be replaced by a terminal. For example, a configuration in which communication between a base station and a terminal is replaced with communication between a plurality of terminals 20 (for example, may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) Each aspect/embodiment of the present disclosure may be applied. In this case, the terminal 20 may have the functions that the base station 10 described above has. Further, words such as "upstream" and "downstream" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be replaced with side channels.

Similarly, a terminal in the present disclosure may be replaced by a base station. In this case, a configuration may be adopted in which the base station has the functions that the above-described terminal has.

As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of operations. "Judgment" and "decision" include, for example, judging, calculating, computing, processing, deriving, investigating, and searching. y) (e.g., a search in a table, database, or other data structure), and assuming that an assertion has been made is a "judgment" or "decision." Also, "judgment" and "decision" refer to receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and access. (accessing) (for example, accessing data in memory) may include regarding the act as a "judgment" or "decision." In addition, "judgment" and "decision" mean that things such as resolving, selecting, choosing, establishing, and comparing are considered to be "judgment" and "decision." may be included. In other words, "judgment" and "decision" may include regarding some action as having been "judged" or "determined." Moreover, "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

The terms "connected", "coupled", or any variations thereof, refer to any connection or coupling, direct or indirect, between two or more elements and to each other. It may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled." The bonds or connections between elements may be physical, logical, or a combination thereof. For example, "connection" may be replaced with "access." As used in this disclosure, two elements may include one or more electrical wires, cables, and/or printed electrical connections, as well as in the radio frequency domain, as some non-limiting and non-inclusive examples. , electromagnetic energy having wavelengths in the microwave and optical (both visible and non-visible) ranges.

The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applied standard.

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

As used in this disclosure, any reference to elements using the designations "first," "second," etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in any way.

"Means" in the configurations of each of the above devices may be replaced with "unit", "circuit", "device", etc.

Where the terms "include", "including", and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising". It is intended that Furthermore, the term "or" as used in this disclosure is not intended to be exclusive or.

A radio frame may be composed of one or more frames in the time domain. Each frame or frames in the time domain may be called a subframe. A subframe may also be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

Numerology may be a communication parameter applied to the transmission and/or reception of a signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, and transceiver It may also indicate at least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like.

A slot consists of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access)) in the time domain. s) symbols, etc.). A slot may be a unit of time based on numerology.

A slot may include multiple minislots. Each minislot may be made up of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot. PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.

Radio frames, subframes, slots, minislots, and symbols all represent time units for transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol.

For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, and one slot or minislot may be called a TTI. You can. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), a code block, a codeword, etc., or may be a processing unit of scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI that is shorter than a normal TTI may be referred to as an abbreviated TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, or the like.

Note that long TTI (for example, normal TTI, subframe, etc.) may be read as TTI with a time length exceeding 1 ms, and short TTI (for example, short TTI, etc.) It may also be read as a TTI having the above TTI length.

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

Additionally, the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI long. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

Note that one or more RBs include a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc. May be called.

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

A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth, etc.) may refer to a subset of contiguous common resource blocks (RB) for a certain numerology in a certain carrier. Here, the common RB may be specified by an RB index based on a common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

The BWP may include a UL BWP (UL BWP) and a DL BWP (DL BWP). One or more BWPs may be configured within one carrier for a UE.

At least one of the configured BWPs may be active and the UE may not expect to transmit or receive a given signal/channel outside of the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

The structures of radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB, Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

In this disclosure, when articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are plural.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may also be interpreted similarly to "different."

Each aspect/embodiment described in this disclosure may be used alone, in combination, or may be switched and used in accordance with execution. In addition, notification of prescribed information (for example, notification of "X") is not limited to being done explicitly, but may also be done implicitly (for example, not notifying the prescribed information). Good too.

Note that in the present disclosure, the SS block or CSI-RS is an example of a synchronization signal or a reference signal.

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present disclosure as determined by the claims. Therefore, the description of the present disclosure is for the purpose of illustrative explanation and is not intended to have any limiting meaning on the present disclosure.

10 Base station 110 Transmitting section 120 Receiving section 130 Setting section 140 Control section 20 Terminal 210 Transmitting section 220 Receiving section 230 Setting section 240 Control section 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims (5)

a receiving unit that receives bitmap information indicating one or more uplink resource areas capable of transmitting feedback information for data received from a base station;
a control unit that postpones the transmission of the feedback information until a time position where there is a valid uplink resource for transmitting the feedback information based on the bitmap information;
a transmitter configured to transmit the feedback information on the available uplink resources;
A terminal equipped with The bitmap information is such that each resource region among a plurality of resource regions obtained by equally dividing resources of a specific time interval and a specific bandwidth in the time direction and frequency direction transmits the feedback information. indicates whether it can be used for
The terminal according to claim 1. The control unit sets a plurality of bitmaps based on the parameters received from the base station, and among the set bitmaps, the bitmap designated by the control information received by the reception unit is transmitted to the feedback unit. using the information as bitmap information indicating one or more uplink resource regions in which the information can be transmitted;
The terminal according to claim 1. the bitmap information indicates one or more uplink resource regions capable of transmitting feedback information for semi-persistent data transmission from the base station;
The terminal according to claim 1. a receiving unit that receives bitmap information indicating one or more uplink resource areas capable of transmitting feedback information for data received from a base station;
a transmitter that transmits bitmap information indicating one or more uplink resource areas in which the terminal can transmit feedback information in response to the transmitted data;
a control unit that postpones reception of the feedback information until a time position where there is an effective uplink resource for receiving the feedback information based on the bitmap information;
a receiver for receiving the feedback information on the available uplink resources;
A base station equipped with

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