WO2022091556A1 - Terminal, base station, and communication method - Google Patents

Abstract

This terminal comprises: a reception unit that receives bitmap information indicating one or a plurality of uplink resource regions that can transmit feedback information for data received from a base station; a control unit that, on the basis of the bitmap information, defers the transmission of the feedback information until a time position at which an applicable uplink resource for transmitting the feedback information is present; and a transmission unit that transmits the feedback information using the applicable uplink resource.

Description

Terminals, base stations, and communication methods

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

In 3GPP (3rd Generation Partnership Project), in order to realize further increase in system capacity, further increase in data transmission speed, further reduction in delay in wireless sections, etc., 5G or NR (New Radio) is used. Studies on a so-called wireless communication method (hereinafter, the wireless communication method is referred to as "NR") are in progress. In 5G, various wireless technologies and network architectures are being studied in order to satisfy the requirement that the delay of the wireless section be 1 ms or less while achieving a throughput of 10 Gbps or more.

In addition, the NR defines a downlink SPS (Semi-Patent Scheduling) in which PDSCH resources are set in advance in the terminal and activation / release is performed by DCI, which enables low-delay data reception. (For example, Non-Patent Documents 1 and 2).

If the UL slot is arranged after the plurality of DL slots are consecutive, the terminal may transmit a plurality of HARQ-ACKs corresponding to the reception of the plurality of data in the UL slot after the DL slot. There is a possibility that the reliability of HARQ-ACK may decrease when the load of the payload of HARQ-ACK (density of information contained in the payload) is high.

Further, in the case of postponing the transmission of HARQ-ACK, the next first available PUCCH resource is postponed by one terminal because the terminal autonomously selects it without being instructed by the base station. Conflicts can occur between the transmission of HARQ-ACK and the postponed transmission of HARQ-ACK by another terminal.

When the UL acknowledgment indicator (CI) is used to avoid a conflict between the postponed HARQ-ACK transmission by one terminal and the postponed HARQ-ACK transmission by another terminal, The postponed HARQ-ACK transmission will be dropped rather than further postponed. That is, it is not envisioned that UL CI will be used to avoid a conflict between the postponed HARQ-ACK transmission by one terminal and the postponed HARQ-ACK transmission 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 enables a terminal that has received data to appropriately transmit feedback information for data reception to a base station.

According to the disclosed technique, a receiver that receives bitmap information indicating one or more uplink resource areas capable of transmitting feedback information on data received from a base station.
A control unit that postpones the transmission of the feedback information to a time position where a valid uplink resource for transmitting the feedback information exists based on the bitmap information.
A transmitter that transmits the feedback information with the valid uplink resource, and
A terminal is provided.

According to the disclosed technique, a technique is provided that enables a terminal that has received data to appropriately transmit feedback information for data reception to a base station.

It is a figure for demonstrating the wireless communication system in embodiment of this invention. It is a figure for demonstrating the wireless communication system in embodiment of this invention. It is a figure for demonstrating the basic operation of the wireless communication system in embodiment of this invention. It is a figure which shows the example of SPS HARQ-ACK. It is a figure which shows the example of the case where the reliability of HARQ-ACK may decrease. It is a figure which shows the example of the collision between the transmission of postponed HARQ-ACK by one terminal, and the transmission of postponed HARQ-ACK by another terminal. It is a figure which shows the example in the case of using UL cancellation indication (CI). It is a figure which shows the example of the applicable resource area pattern. It is a figure which shows the example which divides the resource contained in a specific time domain and a specific bandwidth into X × Y resource areas. It is a figure which shows the example which divides the resource contained in a specific time domain and a specific bandwidth into Z resource areas. It is a figure which shows the example of SPS-Config. It is a figure which shows the example of PDSCH-Config. It is a figure which shows an example of the functional structure of the base station 10 in embodiment of this invention. It is a figure which shows an example of the functional structure of the terminal 20 in embodiment of this invention. It is a figure which shows an example of the hardware composition of the base station 10 or the terminal 20 in embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

The existing technique may be appropriately used in the operation of the wireless communication system according to the embodiment of the present invention. The existing technique is, for example, an existing NR or LTE, but is not limited to the 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. The wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20 as shown in FIG. Although FIG. 1 shows one base station 10 and one terminal 20, this is an example, and each of them may be plural.

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 the radio signal are defined in the time domain and the frequency domain, 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, the TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe.

The base station 10 can perform carrier aggregation that bundles a plurality of cells (a plurality of CCs (component carriers)) and communicates 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, and the like to the terminal 20. Synchronous signals are, for example, NR-PSS and NR-SSS. The system information is transmitted by, for example, 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 by DL (Downlink), and receives the control signal or data from the terminal 20 by UL (Uplink). Here, what is transmitted on a control channel such as PUCCH or PDCCH is called a control signal, and what is transmitted on a shared channel such as PUSCH or PDSCH is called data. Such a name is an example. Is.

The terminal 20 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives a control signal or data from the base station 10 on the DL and transmits the control signal or data to the base station 10 on the UL, thereby providing various types provided by the wireless communication system. Use communication services. The terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.

The terminal 20 can perform carrier aggregation that bundles a plurality of cells (a plurality of CCs (component carriers)) and communicates with the base station 10. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used. Moreover, PUCCH-S Cell having PUCCH may be used.

FIG. 2 shows a configuration example of a wireless communication system when DC (Dual connection) is executed. 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 the core network. The terminal 20 can communicate with both the base station 10A and the base station 10B.

The cell group provided by the base station 10A, which is an MN, is called an MCG (Master Cell Group), and the cell group provided by the base station 10B, which is an SN, is called an SCG (Secondary Cell Group). Further, 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 operation in the present embodiment may be executed in the system configuration shown in FIG. 1, may be executed in the system configuration shown in FIG. 2, or may be executed in a system configuration other than these.

(Basic operation example)
A basic operation example of the communication system according to the embodiment of the present invention will be described with reference to FIG. This operation is basically a common operation for each Example 1.

In S101, the base station 10 transmits downlink SPS setting information, PUCCH resource setting information, slot format setting information, and the like to the terminal 20 by RRC signaling, and the terminal 20 receives these setting information. Since the present embodiment targets the downlink SPS, "SPS" hereinafter means the downlink SPS.

The slot format setting information is, for example, tdd-UL-DL-ConnectionCommon or tdd-UL-DL-ConfigurationDedicated, and this setting information causes the TDD configuration in each symbol of each slot in one or more slots to be DL, UL, and so on. Whether it is flexible or not is set. Hereinafter, this setting information will be referred to as semi-static TDD setting information. Further, flexible may be described as F. The terminal 20 basically determines 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 candidates for the slot format may be notified to enable the dynamic switching of the slot formats. This setting information is, for example, SlotFormatCombinationsPerCell. Since this information consists of slot format (SF) IDs, it will be referred to as SFI setting information hereafter.

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

The terminal 20 may receive DCI from the base station 10 that dynamically specifies the slot format at or before and after S102. This DCI is control information that specifies an ID that is actually used among a plurality of slot format IDs set in the SFI setting information. When the slot format is specified by this DCI, the terminal 20 determines 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 referred to as dynamic SFI designation information (or dynamic SFI, or SFI).

(About issues)
As described above, each time the terminal 20 receives data by the SPS, the activation DCI specifies a time position (slot) for transmitting HARQ-ACK on the PUCCH resource.

However, in particular, when a plurality of short-cycle SPS are set in the terminal 20, the DL / UL setting of TDD in the slot at the specified time position (setting by semi-static TDD setting information or dynamic SFI designation information). Depending on the situation, it is conceivable that the symbol position where the PUCCH resource is set collides with the DL symbol or the F symbol, and HARQ-ACK cannot be transmitted.

It is conceivable to drop HARQ-ACK when the PUCCH resource collides with the DL symbol or F symbol, but by dropping HARQ-ACK, PDSCH retransmission is required. Therefore, the drop of HARQ-ACK has a large delay and is not desirable.

(Outline 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 that received the PDSCH is designated as the slot for HARQ-ACK transmission, but when the slot corresponds to DL, HARQ- ACK is dropped.

In this embodiment, it is possible to avoid dropping HARQ-ACK due to a collision between the PUCCH resource and the DL symbol / F symbol.

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 occurs, the terminal 20 is postponed to the next available UL resource and HARQ. -Send ACK.

(Detailed issues related to the embodiment)
In order to avoid the drop of HARQ-ACK of SPS due to the collision of PUCCH with at least one "DL or F symbol" in TDD at the 3GPP meeting, R.M. It has been agreed to carry out 17 enhancements.

Candidates A to G below can be considered as an enhancement method for avoiding the drop of HARQ-ACK of SPS due to the collision of PUCCH with at least one "DL or F symbol".

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

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

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

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

Candidate E: Supports a one-shot HARQ-ACK request (that is, type 3 HARQ-ACK Codebook) for a group of SPS HARQ processes.

Candidate F: Supports non-positive values (that is, Non Natural K1) for DL SPS operation in the license spectrum.

Candidate G: Retransmit HARQ-ACK autonomously, or multiplex the dropped HARQ-ACK information to another HARQ-ACK information.

For at least candidate A and candidate B, the terminal 20 needs to determine whether or not a collision between HARQ-ACK and the "DL symbol or F symbol" occurs by applying the K1 value specified by activation DCI. Since the HARQ-ACK is transmitted with 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. That is, it is unclear for the terminal 20 how to determine whether the PUCCH resource is valid. This is referred to as "problem 1".

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

Hereinafter, an example of determining the effectiveness of PUCCH regarding the above-mentioned "DL symbol or F symbol" will be described more specifically in different cases.

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

That is, if SSB / CORESET # 0 reception is set for the symbol, or 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 set, even if the base station 10 instructs the semi-static F symbol as dynamic UL, the terminal 20 may 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 terminal 20 fails to detect SFI, the symbol is invalid for PUCCH and PUCCH is dropped.

When the base station 10 instructs the semi-static F symbol as a dynamic DL, the PUCCH is dropped. If the base station 10 designates the semi-static F symbol as the dynamic F, the PUCCH is dropped.

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

<Detailed issues>
For the Ultra-Reliable and Low Latency Communication (URLLC) of Release 16 of 3GPP, when one or more downlink Semi-Persistence Scheduling (SPS) is set for the terminal 20 in the activation DCI. , A single HARQ-ACK feedback timing value is shown, so multiple Physical Uplink Control Channels for transmission of the SPS Hybrid Automatic Repeat Request (HARQ), especially when downlink communication is congested. Conflicts can occur between (PUCCH) resources and slot formats specified by quasi-static time division multiplexing or dynamic slot format identifiers (SFIs).

When reusing the mechanism of Release 15 of New Radio (NR) for multiple SPS settings, Physical Downlink associated with dropping the conflicted HARQ-ACK transmission (transmission of HARQ delivery confirmation information). It is assumed that the sheared channel (PDSCH) is retransmitted (transmission).

At 3GPP meetings, avoid SPS HARQ-ACK drops in the case of TDD due to PUCCH collisions (eg, collisions between a downlink (DL) or flexible symbol (F) and a resource transmitting the PUCCH). It is expected that Release 17 will be extended in order to do so.

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

FIG. 5 is a diagram showing an example in the case where the reliability of HARQ-ACK may decrease. In the example of FIG. 5, in the time domain, five DL slots are consecutively set, and then two UL slots are set.

The terminal 20 attempts to transmit HARQ-ACK in the penultimate slot in the time domain based on the K1 value with respect to SPS PDSCH1 in the first DL slot in the time domain in the example of FIG. Since the second slot is a DL slot, the terminal 20 postpones the transmission of HARQ-ACK to the next available first UL slot, the first to sixth slot in the time domain.

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

Further, 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 of the HARQ-ACK transmitted by the UL resource, which is the sixth slot from the first in the time domain, becomes heavy, and the reliability of the HARQ-ACK may decrease. ..

(Problem 2)
The PUCCH load of the first available UL slot / subslot after one DL slot / subslot or multiple contiguous DLs / subslots is such that the multiple terminals 20 postponed HARQ-ACK. It can be high because it may be transmitted in the first available UL slot / subslot.

(Problem 3)
When the transmission of HARQ-ACK of SPS is postponed, the resource of the next first available PUCCH is autonomously selected by the terminal 20 without being instructed by the base station 10, so that one terminal 20 is used. , A conflict may occur between the postponed HARQ-ACK transmission and the postponed HARQ-ACK transmission by another terminal 20 (when not multiplexing HARQ-ACK and SPS HARQ for dynamic PDSCH). , Or other plurality of PUCCHs or PUSCHs and SPS HARQs are multiplexed).

FIG. 6 is a diagram showing an example of a collision between a postponed HARQ-ACK transmission by one terminal 20 and a postponed HARQ-ACK transmission 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 sixth slot from the first slot is set as the UL slot.

In the first slot in the time direction, the terminal 20 # 1 receives the SPS PDSCH. Terminal 20 # 1 attempts to transmit HARQ-ACK for receiving SPS PDSCH in the third slot from the first slot in the time direction based on the K1 value. However, in the time direction, the third slot from the first slot is the DL slot. Therefore, terminal 20 # 1 postpones the transmission of HARQ-ACK to the first available UL slot after the DL slot. In the example of FIG. 6, terminal 20 # 1 transmits HARQ-ACK in the sixth slot from the first slot in the time direction.

Further, in the slot next to the first slot in the time direction, the terminal 20 # 2 receives the SPS PDSCH. Terminal 20 # 2 attempts to transmit HARQ-ACK for receiving SPS PDSCH in the fifth slot from the first slot in the time direction based on the K1 value. However, in the time direction, the fifth slot from the first slot is the DL slot. Therefore, terminal 20 # 2 postpones the transmission of HARQ-ACK to the first available UL slot after the DL slot. In the example of FIG. 6, 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 the terminal 20 # 1 and the transmission of HARQ-ACK by the terminal 20 # 2.

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

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

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

Since the direction of the symbol is UL, the SPS HARQ resource (resource for transmitting HARQ-ACK to SPS PDSCH) is valid, and additional conditions for postponing SPS HARQ transmission (transmission of HARQ-ACK to SPS PDSCH). When (for example, max K1 limitation that the PUCCH resource exceeding the maximum value of K1 is not valid) is satisfied, the SPS HARQ resource can be used by the terminal 20 to transmit HARQ-ACK to the SPS PDSCH. May be.

If the SPS HARQ resource that follows the pattern of the SPS HARQ resource overlaps with an inappropriate resource area, the terminal 20 cannot use the SPS HARQ resource for the SPS HARQ transmission, and the terminal 20 transmits the SPS HARQ. , SPS HARQ resources may be postponed until the next SPS HARQ resource that meets the conditions for transmitting HARQ-ACK to SPS PDSCH.

If the SPS HARQ resource that follows the pattern of the SPS HARQ resource does not overlap with the inappropriate resource area, the terminal 20 may use the SPS HARQ resource for the transmission of the SPS HARQ.

When the SPS HARQ resource is invalid because the direction of the symbol is DL, the terminal 20 is not expected to use the SPS HARQ resource for the transmission of the SPS HARQ. When the SPS HARQ resource is invalid because the direction of the symbol is DL, the terminal 20 determines whether to further postpone the transmission of the SPS HARQ based on whether the max K1 limitation is satisfied. May be good.

For example, the time interval between the resource that received the SPS PDSCH and the next available SPS HARQ resource is the maximum of K1 based on the condition of max K1 limitation that the PUCCH resource exceeding the maximum value of K1 is not valid. If the value is not exceeded, the terminal 20 may postpone the transmission of the SPS HARQ to the next available SPS HARQ resource, and the resource receiving the SPS PDSCH and the next available SPS HARQ resource If the time interval between them exceeds the maximum value of K1, the transmission of SPS HARQ may be dropped.

The applicable resource area pattern may act only on the SPS HARQ resource. In other words, when the resource for transmitting the deferred SPS HARQ is multiplexed with other PUCCH resources (for example, when the deferred SPS HARQ is transmitted together with the dynamic HARQ in the dynamic HARQ resource, or the Channel State Information (CSI) When the CSI of the resource and the resource for the postponed SPS HARQ transmission are multiplexed), the applicable resource area pattern should not affect the transmission of the other PUCCH resource. It may be set.

FIG. 8 is a diagram showing 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 sixth and seventh slots from the first slot are set as UL slots.

In the example of FIG. 8, the sixth slot from the first slot in the time direction is the first available UL slot after the DL slot. However, in the sixth slot from the first slot in the time direction, the higher resource area in the frequency direction is an inappropriate resource for transmission of SPS HARQ. Therefore, the applicable resource area pattern is the resource area having the lower frequency in the first slot to the sixth slot in the time direction and the resource area having the lower frequency in the seventh slot from the first slot in the time direction. It is composed of a region and a resource region having 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 receives the SPS PDSCH in the third slot from the first slot in the time direction based on the K1 value. Attempt to send HARQ-ACK. However, in the time direction, the third slot from the first slot is the DL slot. Therefore, the terminal 20 selects a resource area applicable to the transmission of HARQ-ACK for receiving the SPS PDSCH based on the applicable resource area pattern, and transmits the SPS HARQ in the selected resource area. In the example of FIG. 8, the terminal 20 selects the resource area having the lower frequency in the first slot to the seventh slot in the time direction as a resource for transmitting the SPS HARQ.

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

(Option 1)
Resources contained in a particular time domain and a particular bandwidth may be evenly divided into XY 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 display bit (indication bit) of the XY bits included in the bitmap may correspond to each resource in the XY resource areas. For example, XX resource areas may be numbered in ascending order of resource positions, and the i-th bit of the XX bits included in the bitmap is XXY. It may correspond to the i-th resource in the ascending order of the resource areas. In the above example, numbers are assigned in ascending order of resource positions, but this embodiment is not limited to this example. For example, numbers may be assigned in descending order of resource positions.

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

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

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

Alternatively, the ascending order of the resource areas of the X × Y resource areas is that first the resource area is counted in the frequency domain, then all the resource areas are counted in the time domain, and then the resource area is counted in the time domain. The order may be such that after counting one, all the resource regions are counted in the frequency domain. In this case, the bitmap showing the resource area pattern applicable to the transmission of SPS HARQ in the example of FIG. 9 may be 00011000101.

When the resources contained in a specific time domain and a specific bandwidth are evenly divided into X × Y resource areas, the base station 10 uses a dedicated DCI field to use a dedicated DCI field to divide the X value and the Y value. 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 value of X and the value of Y may be preset (eg, X = 2, Y = 1).

When the resources contained in a specific time domain and a specific bandwidth are evenly divided into X × Y resource areas, the base station 10 uses a dedicated DCI field to use the time domain of each resource area. The resource size of the above and the resource size of the frequency domain may be notified to the terminal 20. Alternatively, the base station 10 may use RRC signaling (which may be RRC configuration) to notify the terminal 20 of the resource size in the time domain and the resource size in the frequency domain of each resource area. Alternatively, the time domain resource size and frequency domain resource size of each resource domain may be preset (eg, N resource blocks (RBs) in the frequency domain and one slot in the time domain. May be).

When the resources contained in a specific time domain and a specific bandwidth are evenly divided into XY resource areas, the base station 10 uses a dedicated DCI field to determine the resource area in the time domain. The terminal 20 may be notified of the start position and the start position of the resource area in the frequency domain. Alternatively, the base station 10 may use RRC signaling (which may be RRC configuration) to notify the terminal 20 of the start position of the resource domain in the time domain and the start position of the resource domain in the frequency domain. .. Alternatively, the start position of the resource domain in the time domain and the start position of the resource domain in the frequency domain may be preset (for example, the second slot is the start position of the resource domain in the time domain and Physical). Resource Block (PRB) # 0 may be the start position of the resource domain 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 the transmission of SPS HARQ. For example, one bit may be used to indicate whether one resource area is applicable to SPS HARQ transmission.

Resources included in a specific time domain and a specific bandwidth may be divided into Z resource areas. Here, the size of the resource in the time domain of one of the Z resource areas and / or the resource size of the frequency domain is the resource size of the time domain of the other resource area of the Z resource areas. And / or may differ from the resource size in the frequency domain.

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

Here, the ascending order of the resource start positions of the Z resource regions is the resource start positions included in the frequency domain corresponding to the resource start positions in the time domain after first counting one resource start position in the time domain. Even if all are counted, then one next resource start position is counted in the time domain, 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 specified in the same manner.

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

In the example of FIG. 10, the ascending order of resource start of X resource regions is that the resource start position is first counted in the time domain and then the resource start included in the frequency domain corresponding to the resource start position in the time domain. All positions are counted, then one 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, and so on. You may. In this case, the bitmap showing the resource area pattern applicable to the transmission of SPS HARQ may be 001011.

Alternatively, the ascending order of the resource start positions in the Z resource regions is the resource start positions included in the time domain corresponding to the resource start positions in the frequency domain after first counting one resource start position in the frequency domain. , Then count one next resource start position in the frequency domain, then count all resource start positions in the time domain corresponding to the resource start position in that frequency domain, and so on. May be good. The ascending order of the resource end positions of the Z resource areas may be specified in the same manner.

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

Resource allocation may be defined for each resource area. When the 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 information indicating the resource start position in the frequency domain. (This information may not be included if there is no gap between two adjacent resource regions).

In the case of dividing a resource included in a specific time domain and a specific bandwidth into Z resource areas, the base station 10 uses a dedicated DCI field to transmit resource allocation information of each resource area to the terminal 20. May be notified to. Resource allocation information may be presented directly in a dedicated DCI field. Alternatively, in a dedicated DCI field, an index indicating a row of the table may be indicated, and the index indicating the row 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 by using RRC signaling (which may be RRC configuration). Alternatively, the resource allocation information for each resource area may be preset.

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

Hereinafter, an example of a method in which the base station 10 notifies the terminal 20 of the bitmap will be described.

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

The DCI format used by the base station 10 to dynamically notify the terminal 20 of the bitmap may be an existing terminal 20-specific (UE-specific) DCI format, or may be common to existing groups (existing group common). It may be in the DCI format of group-common).

Alternatively, a new DCI field may be specified 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 Identifier Identifier (RNTI).

Alternatively, for example, a new RNTI may be used to specify a new DCI field for bitmap notifications. Alternatively, base station 10 may use existing fields in DCI format to notify terminal 20 of the bitmap. The DCI used for the applicable resource area pattern of SPS HARQ may be specified by a new field or a combination of specific values of some fields.

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

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

When the group-comon DCI format is used as the DCI format used by the base station 10 to dynamically notify the terminal 20 of the bitmap, the bitmap is displayed together with the conventional notification. A DCI for notifying may be transmitted, or a DCI for notifying a bitmap may be transmitted without conventional notification.

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

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

It is possible for the base station 10 to use the DCI format when dynamically notifying the terminal 20 of the bitmap. In the following, an example of the correspondence between the bitmap and the setting of SPS PDSCH transmission to which the bitmap is applied (hereinafter, may be referred to as “SPS setting”) is shown.

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

For example, for one bitmap notified by the base station 10 to 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. It may be, or it may be specified by the index of the SPS setting contained in the 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. It may be the SPS setting that has been set, or it may be the SPS setting that was received immediately after the notification of the DCI.

One bitmap notified by the base station 10 to the terminal 20 using DCI may be applied to a plurality of SPS settings.

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

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

A plurality of bitmaps notified by the base station 10 to the terminal 20 using DCI may be applied to a plurality of SPS settings.

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

For example, for a plurality of bitmaps notified by the base station 10 to the terminal 20 using DCI, the plurality of SPS settings to which the plurality of bitmaps are applied are all activated SPS settings. There may be.

It is possible for the base station 10 to use the DCI format when dynamically notifying the terminal 20 of the bitmap. The following is an example of the conditions under which the bitmap is applied to the SPS settings.

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

(Prerequisite 2 to which bitmap is applied)
When the base station 10 uses the DCI format to notify the terminal 20 of the bitmap, the HARQ setting is the SPS setting notified by the DCI and the bitmap is applied to the SPS setting. The terminal 20 applies the bitmap to the SPS setting if the deferral is already enabled or if the bitmap notification by DCI implicitly enables the deferral of HARQ for the SPS setting. You may.

When the base station 10 uses the DCI format to notify the terminal 20 of the bitmap, the terminal 20 receives the DCI notifying the bitmap when the above-mentioned preconditions 1 and 2 are satisfied. , The bitmap may be applied to the SPS setting.

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 setting. After that, the terminal 20 stops applying the bitmap to the SPS setting.

When the bitmap is applied to the SPS setting only once, the terminal 20 stops applying the bitmap to the SPS setting when one or more of the following conditions are satisfied. You may.

1. When the position of the resource to which the terminal 20 applies the bitmap reaches the end position (in the time direction and / or the frequency direction) of the resource indicated by the bitmap.

2. When the SPS setting to which the bitmap is applied is released.

3. When the action to postpone HARQ is disabled.

4. When an explicit DCI is received to stop applying the bitmap to the SPS settings. In this case, the same DCI format as the DCI format of the DCI notifying the bitmap may be used as the explicit DCI for stopping the application of the bitmap to the SPS setting.

5. When another DCI is received to notify the bitmap and a new bitmap is 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 setting. After that, the terminal 20 stops applying the bitmap to the SPS setting.

For example, when the bitmap is repeatedly applied to the SPS setting, the base station 10 may notify the repetition cycle by DCI, notify by RRC signaling, or preset it. The terminal 20 may repeatedly apply the bitmap to the SPS setting based on the notified repetition cycle. In this case, the terminal 20 may stop applying the bitmap to the SPS setting when one or more of the following conditions are satisfied.

1. When the SPS setting to which the bitmap is applied is released.

2. When the action to postpone HARQ is disabled.

3. When an explicit DCI is received to stop applying the bitmap to the SPS settings. In this case, the same DCI format as the DCI format of the DCI notifying the bitmap may be used as the explicit DCI for stopping the application of the bitmap to the SPS setting.

4. When another DCI is received to notify the bitmap and a new bitmap is used.

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

For example, a new information element, SPS-Config, may be specified, 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, “Length N”, which is a parameter for setting the maximum length of the bitmap, may be set by RRC in SPS-Config. Alternatively, "LengthN" may be preset in the SPS-Config.

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

The base station 10 may set a bitmap indicating an applicable resource area pattern for the terminal 20 by using the RRC parameter. In this case, the terminal 20 may apply the bitmap to the SPS setting on the precondition that the SPS setting is activated and the postponement of HARQ is enabled.

When the above preconditions are satisfied and the bitmap is set by RRC, the terminal 20 may always apply the set bitmap to the SPS setting.

When the above preconditions are satisfied, the base station 10 may transmit a DCI for activating the set bitmap to the terminal 20, and the terminal 20 may use the RRC based on the received DCI. You may activate the configured bitmap. In this case, DCI may apply one bitmap to one SPS setting, or DCI may apply a plurality of bitmaps to a plurality of SPS settings.

When activating a bitmap set by RRC with DCI, an SPS setting to apply the bitmap may be specified using a dedicated DCI field. Further, the same DCI format as the above-mentioned notification method 1 may be used for the DCI that activates the bitmap set by the RRC.

After the bitmap set by RRC is applied to the SPS setting, the terminal 20 stops applying the bitmap to the SPS setting when one or more of the following conditions are satisfied. You may.

1. When the SPS setting to which the bitmap is applied is released.

2. When the action to postpone HARQ is disabled.

3. When an explicit DCI is received to stop applying the bitmap to the SPS settings. In this case, the same DCI format as the DCI format of the DCI for notifying the bitmap of the above-mentioned notification method 1 may be used as the explicit DCI for stopping the application of the bitmap to the SPS setting.

4. When another DCI is received to notify the bitmap and a new bitmap is used.

For example, a new information element, PDSCH-Config, may be specified, 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, “Length N”, which is a parameter for setting the maximum length of the bitmap, may be set by RRC in PDSCH-Config. Alternatively, "LengthN" may be preset in the PDSCH-Config.

The bitmap set 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 settings. That is, a common bitmap may be applied by PDSCH-Config to all (activated) SPS settings.

The base station 10 may set a bitmap indicating an applicable resource area pattern for the terminal 20 by using the RRC parameter. In this case, the terminal 20 may apply the bitmap to the SPS setting on the precondition that the postponement of HARQ is valid.

If the above prerequisites are met and the bitmap is set by RRC, the terminal 20 may always apply the set bitmap to all activated SPS settings.

When the above preconditions are satisfied, the base station 10 may transmit a DCI for activating the set bitmap to the terminal 20, and the terminal 20 may use the RRC based on the received DCI. You may activate the configured bitmap. In this case, DCI may apply one bitmap to one or more SPS settings.

When activating a bitmap set by RRC with DCI, an SPS setting to apply the bitmap may be specified using a dedicated DCI field. Further, the same DCI format as the above-mentioned notification method 1 may be used for the DCI that activates the bitmap set by the RRC.

After the bitmap set by RRC is applied to the SPS setting, the terminal 20 stops applying the bitmap to the SPS setting when one or more of the following conditions are satisfied. You may.

1. When the SPS setting to which the bitmap is applied is released.

2. When the action to postpone HARQ is disabled.

3. When an explicit DCI is received to stop applying the bitmap to the SPS settings. In this case, the same DCI format as the DCI format of the DCI for notifying the bitmap of the above-mentioned notification method 1 may be used as the explicit DCI for stopping the application of the bitmap to the SPS setting.

4. When another DCI is received to notify the bitmap and a new bitmap is used.

In the above example, the applicable resource domain pattern, which is the pattern of the resource domain applicable to the transmission of HARQ-ACK to the SPS PDSCH, is used to set the resource domain of the time and frequency domain to the HARQ-ACK to the SPS PDSCH. A method of indicating to the terminal 20 whether or not it can be used for transmission is described. As a method of notifying the terminal 20 of the applicable resource area pattern by the base station 10, a method of notifying the terminal of the bitmap using DCI and a method of setting the bitmap to the terminal by RRC signaling are proposed. Has been done. Options for using these DCIs and options for using RRC signaling are shown.

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

(About UE capability information)
UE capability to indicate whether the terminal 20 supports the following functions in order to avoid dropping SPS HARQ-ACK due to collision of at least one "DL symbol or F symbol" with a PUCCH resource in the case of TDD schemes. 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, for example, an applicable resource area pattern based on the UE capability information.

・ UE capability information indicating whether or not HARQ-ACK postponement is supported in the case of TDD method.

-UE capability information indicating whether or not the function of setting the applicable resource area pattern for the postponement of HARQ-ACK is supported.

(Device configuration)
Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processes and operations described so far will be described. The base station 10 and the terminal 20 include a function of implementing the above-mentioned proposals 1 and 2. However, the base station 10 and the terminal 20 may each have only the function of any one of the proposals 1 and 2.

<Base station 10>
FIG. 13 is a diagram showing an example of the functional configuration of the base station 10. As shown in FIG. 13, the base station 10 has a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 13 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed. The transmitting unit 110 and the receiving unit 120 may be referred to as a communication unit.

The transmission 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 information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, DL data, etc. to the terminal 20. Further, the transmission unit 110 transmits the setting information and the like described in the proposals 1 and 2.

The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads them out from the storage device as needed. The control unit 140, for example, allocates resources, controls the entire base station 10, and the like. The function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120. Further, the transmitting unit 110 and the receiving unit 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 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 14 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed. The transmitting unit 210 and the receiving unit 220 may be referred to as a communication unit.

The transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the transmitting unit 210 transmits HARQ-ACK, and the receiving unit 220 receives the setting information and the like described in the proposals 1 and 2.

The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed. The setting unit 230 also stores preset setting information. The control unit 240 controls the entire terminal 20 and the like. The transmission unit 210 may include the function unit related to signal transmission in the control unit 240, and the reception unit 220 may include the function unit related to signal reception in the control unit 240. Further, the transmitter 210 and the receiver 220 may be referred to as a transmitter and a receiver, respectively.

The terminal 20 and the base station 10 are configured as, for example, the terminals and base stations described in the following items.
(Section 1)
A receiver that receives bitmap information indicating one or more uplink resource areas capable of transmitting feedback information on data received from a base station.
A control unit that postpones the transmission of the feedback information to a time position where a valid uplink resource for transmitting the feedback information exists based on the bitmap information.
A transmitter that transmits the feedback information with the valid uplink resource, and
A terminal equipped with.
(Section 2)
The bitmap information is such that each resource area of a plurality of resource areas obtained by evenly dividing a resource having a specific time interval and a specific bandwidth in the time direction and the 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 plurality of bitmaps, the control unit feeds back the bitmap specified by the control information received by the reception unit. Used as bitmap information indicating one or more uplink resource areas to which information can be transmitted,
The terminal described in paragraph 1.
(Section 4)
The bitmap information indicates one or more uplink resource areas capable of transmitting feedback information for semi-persistent data transmission from the base station.
The terminal described in paragraph 1.
(5th draft)
A receiver 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 to which the terminal can transmit feedback information to the transmitted data.
Based on the bitmap information, a control unit that postpones the reception of the feedback information until the time position where a valid uplink resource for receiving the feedback information exists.
A receiver that receives the feedback information with the valid uplink resource,
Base station equipped with.

The configuration described in any of the above sections provides a technique that enables a terminal that has received data to appropriately transmit feedback information for data reception to a base station.

(Hardware configuration)
The block diagram (FIGS. 13 and 14) used in the description of the above embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. There are, but are limited to, broadcasting, notification, communication, forwarding, configuration, reconfiguring, allocating, mapping, and the like. I can't. For example, a functional block (constituent unit) for functioning transmission is referred to as a transmitting unit (transmitting unit) or a transmitter (transmitter). In each case, as described above, the realization method is not particularly limited.

For example, the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 15 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 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, and the like. May be good.

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

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

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like. For example, the above-mentioned control unit 140, control unit 240, and the like may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 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 by 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 by the processor 1001. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be mounted by one or more chips. The program may be transmitted from the network via a telecommunication line.

The storage device 1002 is a computer-readable recording medium. It may be configured. The storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.

The auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu). -It may be composed of at least one of a ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like. The auxiliary storage device 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.

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, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of. For example, the transmission / reception antenna, the amplifier unit, the transmission / reception unit, the transmission line interface, and the like may be realized by the communication device 1004. The transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.

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

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

Further, the base station 10 and the terminal 20 include a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device) hardware, a FPGA (Programmable Logic Device) hardware, and an FPGA (FPGA). It may be configured to include, and 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 hardware.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed inventions are not limited to such embodiments, and those skilled in the art will understand various modifications, modifications, alternatives, substitutions, and the like. There will be. Although explanations have been given using specific numerical examples in order to promote understanding of the invention, these numerical values are merely examples and any appropriate value may be used unless otherwise specified. The classification of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. May apply (as long as there is no conflict) to the matters described in. The boundary of the functional part or the processing part in the functional block diagram does not always correspond to the boundary of the physical component. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. Regarding the processing procedure described in the embodiment, the processing order may be changed as long as there is no contradiction. For convenience of processing, the base station 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EPROM, registers, 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 embodiment / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access) Signaling). It may be carried out by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRC Signaling Setup) message, an RRC connection reconfiguration (RRC Signaling Configuration) message, or the like.

Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobility communication system), 5G (5G). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize and extend based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (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 the present specification may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

In some cases, the specific operation performed by the base station 10 in the present specification may be performed by its upper node (upper node). In a network consisting of one or more network nodes having a base station 10, various operations performed for communication with the terminal 20 are performed by a network node other than the base station 10 and the base station 10 (a network node other than the base station 10 and the base station 10). For example, MME, S-GW, etc. are conceivable, but it is clear that it can be done by at least one of these). In the above example, the case where there is one network node other than the base station 10 is illustrated, but the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..

The information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information and the like may be stored in a specific location (for example, a memory) or may be managed using a management table. Information to be input / output may be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

The determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparison of numerical values (for example,). , Comparison with a predetermined value).

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

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

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

The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC: Component Carrier) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

Further, the information, parameters, etc. described in the present disclosure may be expressed using an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (eg, 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 limited in any way. It's not a name.

In this disclosure, "base station (BS: Base Station)", "radio base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB ( gNB) ”,“ access point ”,“ transmission point (transmission point) ”,“ reception point ”,“ transmission / reception point (transmission / reception point) ”,“ cell ”,“ sector ”,“ Terms such as "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (eg, 3) cells. When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)). Communication services can also be provided by (Remote Radio Head). The term "cell" or "sector" is a part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage. Point to.

In the present disclosure, terms such as "mobile station (MS: Mobile Station)", "terminal (user terminal)", "terminal (UE: User Equipment)", and "terminal" can be used interchangeably.

Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, terminals. , Wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

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

Further, the base station in the present disclosure may be read by the 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, it may be referred to as 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 of the base station 10 described above. In addition, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the upstream channel, the downstream channel, and the like may be read as a side channel.

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

The terms "determining" and "determining" used in the present disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (diving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as "judgment" or "decision". Further, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include the fact that (for example, accessing the data in the memory) is regarded as "judgment" or "decision". In addition, "judgment" and "decision" are regarded as "judgment" and "decision" that the things such as solving, selecting, selecting, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal may be abbreviated as RS (Reference Signal), and may be called a pilot according to the applied standard.

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

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

The "means" in the configuration of each of the above devices may be replaced with a "part", a "circuit", a "device", or the like.

When "include", "include" and variations thereof are used in the present disclosure, these terms are as inclusive as the term "comprising". Is intended. Moreover, the term "or" used in the present disclosure is intended not to be exclusive.

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

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

The slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiple Access) symbol, SC-FDMA (Single Carrier Frequency Division Access) symbol, etc.) in the time region. Slots may be time units based on numerology.

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

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.

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

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

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

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

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

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

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

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

In addition, one or more RBs include a physical resource block (PRB: Physical RB), a subcarrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.

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

Bandwidth portion (BWP: Bandwidth Part) (which may also be referred to as partial bandwidth or the like) may represent a subset of consecutive common RBs (common resources blocks) for a certain neurology in a carrier. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

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

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

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

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

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

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

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 may be implemented as amendments and modifications without departing from the spirit and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of this disclosure is for purposes of illustration and does not have any limiting meaning to this disclosure.

This international patent application claims its priority based on Japanese Patent Application No. 2020-179249 filed on October 26, 2020, and the entire contents of Japanese Patent Application No. 2020-179249 are included in the present application. Use it.

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

Claims (6)

1. A receiver that receives bitmap information indicating one or more uplink resource areas capable of transmitting feedback information on data received from a base station.
   A control unit that postpones the transmission of the feedback information to a time position where a valid uplink resource for transmitting the feedback information exists based on the bitmap information.
   A transmitter that transmits the feedback information with the valid uplink resource, and
   A terminal equipped with.
2. The bitmap information is such that each resource area of a plurality of resource areas obtained by evenly dividing a resource having a specific time interval and a specific bandwidth in the time direction and the frequency direction transmits the feedback information. Indicates whether it can be used for
   The terminal according to claim 1.
3. The control unit sets a plurality of bitmaps based on the parameters received from the base station, and among the set plurality of bitmaps, the control unit feeds back the bitmap specified by the control information received by the reception unit. Used as bitmap information indicating one or more uplink resource areas to which information can be transmitted,
   The terminal according to claim 1.
4. The bitmap information indicates one or more uplink resource areas capable of transmitting feedback information for semi-persistent data transmission from the base station.
   The terminal according to claim 1.
5. A receiver that receives bitmap information indicating one or more uplink resource areas capable of transmitting feedback information on data received from a base station.
   A transmitter that transmits bitmap information indicating one or more uplink resource areas to which the terminal can transmit feedback information to the transmitted data, and a transmitter.
   Based on the bitmap information, a control unit that postpones the reception of the feedback information until the time position where a valid uplink resource for receiving the feedback information exists.
   A receiver that receives the feedback information with the valid uplink resource,
   Base station equipped with.
6. A step of receiving bitmap information indicating one or more uplink resource areas capable of transmitting feedback information on the data received from the base station.
   A step of deferring the transmission of the feedback information to a time position where a valid uplink resource for transmitting the feedback information exists based on the bitmap information.
   The step of sending the feedback information with the valid uplink resource, and
   A communication method using a terminal.

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