WO2023286284A1

WO2023286284A1 - Terminal and communication method

Info

Publication number: WO2023286284A1
Application number: PCT/JP2021/026893
Authority: WO
Inventors: 優元 ▲高▼橋; 聡永田
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2023-01-19
Also published as: JPWO2023286284A1

Abstract

The present invention comprises: a control unit that determines, on the basis of a notification in higher layer signaling and/or a terminal capability, a format of an uplink control signal used in transmission of difference information of a modulating/coding scheme; and a transmission unit that transmits the difference information using an uplink control signal of the determined format.

Description

Terminal and communication method

The present disclosure relates to terminals and communication methods.

In the Universal Mobile Telecommunication System (UMTS) network, Long Term Evolution (LTE) has been specified with the aim of achieving even higher data rates and lower delays. In addition, a successor system to LTE is also under consideration for the purpose of further widening the bandwidth and speeding up from LTE. LTE successor systems include, for example, LTE-Advanced (LTE-A), Future Radio Access (FRA), 5th generation mobile communication system (5G), 5G plus (5G+), Radio Access Technology (New-RAT), New There is a system called Radio (NR).

For example, in NR, strengthening the function of feedback from terminals to base stations is under consideration in order to improve communication quality (for example, Non-Patent Document 1).

There is room for further study in determining the format of the uplink control signal used to transmit (feedback) information from the terminal to the base station.

One aspect of the present disclosure provides a terminal and communication method capable of determining an appropriate format of an uplink control signal used for transmitting information transmitted from the terminal to the base station.

A terminal according to an aspect of the present disclosure, a control unit that determines the format of an uplink control signal used for transmission of difference information of modulation and coding schemes based on one or both of notification in higher layer signaling and terminal capability, and a transmission unit that transmits the difference information using the uplink control signal in the determined format.

A communication method according to an aspect of the present disclosure determines a format of an uplink control signal used for transmission of differential information of modulation and coding schemes based on one or both of notification in higher layer signaling and terminal capability, and The difference information is transmitted using the uplink control signal in the format specified.

It is a figure which shows the 1st example of a table. It is a figure which shows the 2nd example of a table. FIG. 4 is a diagram illustrating an example of UCI mapping for PUCCH format 0; FIG. 4 is a diagram illustrating an example of UCI mapping in PUCCH format 1; 1 is a diagram showing an example of Opt.1 in PF0 of Proposal 1. FIG. 2 is a diagram showing an example of Opt.2 in PF0 of Proposal 1. FIG. 1 is a diagram showing an example of Opt.1 in PF1 of Proposal 1. FIG. FIG. 10 is a diagram showing an example of Proposal 2; 1-1 of Proposal 2 is a diagram showing an example. FIG. 1-2 of Proposal 2 is a diagram showing an example. FIG. FIG. 10 is a diagram showing an example of Opt.1-3 of Proposal 2; 1-4 of Proposal 2 are examples. FIG. 1-5 of Proposal 2 are examples. FIG. 1-6 of Proposal 2 are examples. FIG. FIG. 10 is a diagram showing an example of Proposal 3; FIG. 10 is a diagram showing an example of Proposal 4; FIG. 10 is a diagram showing an example of Proposal 5; 1 is a diagram illustrating an example of a radio communication system according to an embodiment; FIG. 1 is a block diagram showing an example of the configuration of a base station according to this embodiment; FIG. FIG. 2 is a block diagram showing an example of a configuration of a terminal according to this embodiment; FIG. 1 is a diagram illustrating an example of hardware configurations of a base station and a terminal according to an embodiment of the present disclosure; FIG.

An embodiment according to one aspect of the present disclosure will be described below with reference to the drawings.

　3GPP, in Rel.17, is studying technologies for methods called Ultra-Reliable and Low Latency Communications (URLLC) and Industrial Internet of Things (IIoT).

URLLC will consider enhancing terminal feedback for Hybrid Automatic Repeat request - Acknowledgment (HARQ-ACK) and enhancing Channel State Information (CSI) feedback for more accurate Modulation and Coding Scheme (MCS) selection. . HARQ-ACK is an example of information related to acknowledgment (eg, acknowledgment) for data received by the terminal. Physical layer feedback enhancements are being considered for these URLLC considerations.

For example, as an example of enhancing CSI feedback for more accurate MCS selection, it is being considered that terminals feed back information on MCS to the base station. Information fed back from the terminal to the base station is included, for example, in uplink control information (eg, Uplink Control Information (UCI)). Also, for example, the information about the MCS includes information indicating the desired MCS, information indicating the difference between the current MCS (MCS at a certain timing) and the desired MCS, the desired MCS, or the current MCS and/or information indicating an index associated with the difference from the desired MCS. Below, <Information indicating the desired MCS>, <Information indicating the difference between the current MCS and the desired MCS>, and <The desired MCS, or the difference between the current MCS and the desired MCS Associated with Information Indicating Index> will be described below.

<Information indicating the desired MCS>
For example, information indicating a desired MCS may include an MCS Index. The information indicating the desired MCS may use, for example, the MCS Index defined in the MCS Index table defined in 3GPP TS38.214.

For example, the terminal fails to decode a Physical Downlink Shared Channel (PDSCH) transmitted with a certain MCS Index (MCS Index #i (i is an integer of 0 or more)). MCS Index #j lower than MCS Index #i used in (j is an integer greater than or equal to 0 and less than i) is set to the desired MCS Index, and the desired MCS index #j is included in the information to be fed back. good. For example, if the terminal fails to decode PDSCH transmitted with MCS Index#5, the terminal may transmit feedback including MCS Index#0 lower than MCS Index#5 to the base station.

With such a configuration, it is possible to improve the flexibility of the MCS that can be requested from the base station.

<Information indicating the difference between the current MCS and the desired MCS>
Information indicating the difference between the current MCS and the desired MCS is determined based on the current MCS and the desired MCS. For example, the current MCS and the desired MCS may use the MCS Index defined in the MCS Index table defined in 3GPP TS38.214.

For example, when the terminal fails to decode PDSCH transmitted with a certain MCS Index#i, the terminal sets desired MCS Index#j, The difference from MCSIndex#j (for example, "ji") may be included in the feedback information. The desired MCS Index may be lower than the current MCS Index. For example, if the terminal fails to decode the PDSCH transmitted with MCS Index#5 and sets the desired MCS Index to MCS Index#2, the terminal may transmit feedback including "-3" to the base station. good.

With such a configuration, it is possible to improve the flexibility of the MCS that can be requested from the base station, and to reduce the bit size of the information to be fed back.

<Information indicating the desired MCS or the index associated with the difference between the current MCS and the desired MCS>
A table defined for feedback may be introduced. Two examples of tables defined for feedback are given below.

<Table example 1>
A table in which desired MCSs and indexes are associated may be defined, and an index associated with the desired MCS may be selected from the defined table. The selected index may be included in the feedback information.

FIG. 1 is a diagram showing a first example of the table. As shown in FIG. 1, the table defined for feedback may be a table that associates a specifiable MCS Index with an Index that is information to be fed back. The MCS Index that can be specified using the table shown in FIG. 1 may be associated with the MCS Index table defined in 3GPP TS38.214. For example, the MCS Index specifiable using the table shown in FIG. 1 may be part of the MCS Index specifiable in the MCS Index table defined in 3GPP TS38.214.

The terminal may select a desired MCS Index from the table shown in FIG. 1 and transmit feedback information including the Index associated with the selected MCS Index to the base station. The bit size of Index associated with MCS Index may be smaller than the bit size of MCS Index.

According to such a configuration, the bit size of feedback can be reduced, and the signaling load can be suppressed.

<Table example 2>
A table may be defined in which the difference between the current MCS and the desired MCS (hereafter referred to as delta value) is associated with an index, and the index associated with the delta value may be selected from the defined table. The selected index may be included in the feedback information.

FIG. 2 is a diagram showing a second example of the table. As shown in FIG. 2, the table defined for feedback may be a table that associates Delta values with Indexes that are information to be fed back. Delta values may be associated with the MCS Index table defined in 3GPP TS38.214. For example, Delta value in the table shown in FIG. 2 may mean the difference of MCS Index that can be specified in the MCS Index table defined in 3GPPTS38.214.

The terminal sets the desired MCS and determines the Delta value, which is the difference between the current MCS and the desired MCS. Then, the terminal may select the determined delta value from the table shown in FIG. 2 and transmit feedback information including the index associated with the selected delta value to the base station. The bit size of the Index associated with the Delta value may be smaller than the bit size of the Delta value.

Below, the information on MCS mentioned above is referred to as "delta-MCS". Note that "delta-MCS" is not limited to the above information example, and may be information different from the above example. For example, "delta-MCS" may be information about MCS that is different from the information examples described above. Also, "delta-MCS" may be replaced with other names such as "delta-CQI".

In delta-MCS transmission, the use of PUCCH format 0 and PUCCH format 1 is being considered for the resource format used for transmission. Examples of <UCI mapping of PUCCH format 0> and <UCI mapping of PUCCH format 1> are described below. PUCCH is an abbreviation for Physical Uplink Control Channel. UCI stands for Uplink Control Information. Sending may also be translated as reporting, notification, or feedback.

<UCI mapping for PUCCH format 0>
FIG. 3 is a diagram illustrating an example of UCI mapping for PUCCH format 0. In FIG. α ₀ , α ₁ , . . . , α ₁₁ shown in FIG. 3 indicate cyclic shift values (cyclic shift amounts). α ₀ , α ₁ , . . . , α ₁₁ may each have values of 0, 1, .

x in α _x shown in FIG. 3 takes values of 0, 1, . For example, when x=3 (α ₃ ), the cyclic shift amount of the base sequence is "3". A cyclically shifted base sequence is mapped to a 1-symbol or 2-symbol Physical Resource Block (PRB).

The terminal determines the values of m0 and _{m_cs} to calculate the cyclic shift amount. The terminal may, for example, set the value obtained by adding the determined m0 and _{m_cs} as the cyclic shift amount “α”.

m ₀ is provided to the terminal based on Radio Resource Control (RRC) parameters (eg, initialCyclicShift). m ₀ is used for multiplexing UCI between terminals.

m_cs may be determined based on the HARQ-ACK (HARQ-ACK information bits) transmitted to the base station.

For example, when HARQ-ACK is indicated by 1 bit and HARQ-ACK of "0" is transmitted to the base station, m_cs may be "0". In addition, when HARQ-ACK is indicated by 1 bit and HARQ-ACK of "1" is transmitted to the base station, m_cs may be "6" (for example, TS 38.213 V16.6.0 See Table 9.2.3-3).

Also, for example, when HARQ-ACK is indicated by 2 bits and HARQ-ACK of "00" is transmitted to the base station, m_cs may be "0". In addition, when HARQ-ACK is indicated by 2 bits, and HARQ-ACK of '01' is transmitted to the base station, m_cs may be '3' (for example, TS 38.213 V16.6.0 See Table 9.2.3-4).

m_cs may be determined based on the Scheduling Request (SR) sent to the base station. For example, m_cs may be '0' when sending a positive SR to the base station.

m_cs may be determined based on the HARQ-ACK value sent to the base station and the Scheduling Request (SR) sent to the base station. That is, HARQ-ACK and SR may be multiplexed in one PUCCH (PUCCH resource) and transmitted to the base station.

For example, when HARQ-ACK is indicated by 1 bit and HARQ-ACK of "0" and negative SR are transmitted to the base station (when SR is not transmitted to the base station), m_cs is "0 ' may be Also, when HARQ-ACK is indicated by 1 bit and HARQ-ACK of "1" and negative SR are transmitted to the base station, m_cs may be "6". Also, when HARQ-ACK is indicated by 1 bit and HARQ-ACK of "0" and positive SR are transmitted to the base station, m_cs may be "3". Also, when HARQ-ACK is indicated by 1 bit and HARQ-ACK of "1" and positive SR are transmitted to the base station, m_cs may be "9" (for example, TS See Table 9.2.5-1 in 38.213 V16.6.0).

Also, for example, when HARQ-ACK is indicated by 2 bits and HARQ-ACK of "00" and negative SR are transmitted to the base station, m_cs may be "0". In addition, when HARQ-ACK is indicated by 2 bits and HARQ-ACK of "00" and positive SR are transmitted to the base station, m_cs may be "1". Further, when HARQ-AC is indicated by 2 bits and HARQ-ACK of "01" and negative SR are transmitted to the base station, m_cs may be "3". Also, when HARQ-ACK is indicated by 2 bits and HARQ-ACK of '01' and positive SR are transmitted to the base station, m_cs may be '4' (for example, TS See Table 9.2.5-2 in 38.213 V16.6.0).

<UCI mapping for PUCCH format 1>
FIG. 4 is a diagram illustrating an example of UCI mapping for PUCCH format 1. In FIG. α ₀ , α ₁ , . . . , α ₁₁ shown in FIG. 4 indicate cyclic shift amounts. α ₀ , α ₁ , . . . , α ₁₁ may each have values of 0, 1, .

　UCI d(0) and Demodulation Reference Signal (DMRS) are multiplied by base sequence, cyclic shift, and time domain- Orthogonal cover code (TD-OCC). UCI d(0) multiplied by base sequence, cyclic shift, and TD-OCC and DMRS are mapped to PRBs of n symbols (where n is an integer from 4 to 14).

UCI d(0) may be determined based on the 1-bit or 2-bit HARQ-ACK sent to the base station. UCI d(0) may be determined based on positive SRs sent to the base station. _m0 indicates the amount of cyclic shift and is provided to the terminal based on Radio Resource Control (RRC) parameters (eg, initialCyclicShift). m ₀ is used for multiplexing UCI between terminals. TD-OCC is used for multiplexing UCI between terminals.

HARQ-ACK and SR may be multiplexed and transmitted to the base station. For example, the terminal determines PUCCH resources to be used for HARQ-ACK transmission depending on whether the SR is positive SR or negative SR.

Specifically, when the terminal transmits HARQ-ACK and positive SR to the base station, it uses PUCCH resources for SR transmission to transmit HARQ-ACK to the base station. When transmitting HARQ-ACK and negative SR to the base station, the terminal uses PUCCH resources for HARQ-ACK transmission to transmit HARQ-ACK to the base station.

Note that the base station determines that a positive SR has been transmitted when HARQ-ACK is transmitted using PUCCH resources for SR transmission. The base station determines that a positive SR was transmitted when HARQ-ACK was transmitted using the PUCCH resource for HARQ-ACK transmission.

Here, there is room for consideration in determining the PUCCH format used for transmitting information (UCI) transmitted from the terminal to the base station.

For example, there is room for consideration as to whether delta-MCS is transmitted in PUCCH format 0 and/or PUCCH format 1.

Also, if delta-MCS is transmitted in PUCCH format 0 and/or PUCCH format 1, there is room for discussion about the mapping rule (method) of delta-MCS (delta-MCS information bits) to the PUCCH format sequence. .

Also, when delta-MCS is transmitted with HARQ-ACK and/or SR in PUCCH format 0 and/or PUCCH format 1 (when delta-MCS is multiplexed with HARQ-ACK and/or SR), The rules for mapping delta-MCS to PUCCH format sequences are subject to discussion.

In this embodiment, the PUCCH format used for transmitting information from the terminal to the base station is determined appropriately.

Also, in the present embodiment, the rules for mapping delta-MCS to the PUCCH format sequence are determined.

Also, in the present embodiment, a mapping rule for delta-MCS multiplexed with HARQ-ACK and/or SR to the PUCCH format sequence is determined.

It should be noted that the PUCCH may be rephrased as an uplink control signal. In the following, PUCCH format may be referred to as PF.

<Proposal 0: delta-MCS transmission on PF0/1>
The terminal may determine whether it can send delta-MCS on PF0 and/or PF1 (PF0/1).

<Opt.1>
The terminal may decide to send delta-MCS in PF0.

<Opt.2>
The terminal may decide to send delta-MCS on PF1.

<Opt.3>
The terminal may decide to send delta-MCS on PF0 and PF1.

<Opt.4>
The terminal may decide not to send delta-MCS on PF0 and PF1. In this case, the terminal may transmit delta-MCS in PFs other than PF0 and PF1. For example, the terminal may transmit delta-MCS in at least one PF of PF2, PF3, and PF4.

Note that the terminal, which of the above Opt.1 to Opt.4 is used, may be determined by information on the terminal's capabilities (eg, UE Capability), may be determined by RRC parameters, or may be determined by the UE It may be defined by both Capability and RRC parameters.

Also, UE Capability and/or RRC parameters may be defined for each PF, may be defined for each UCI type, or may be defined for each UCI payload size. That is, transmission using PF0/1 of delta-MCS may be defined for each PF, may be defined for each UCI type, or may be defined for each UCI payload size in the UE Capability and/or RRC parameters. may be Note that UCI type indicates whether or not delta-MCS, HARQ-ACK, and SR are multiplexed and transmitted.

For example, delta-MCS transmission may be specified in the UE Capability that PF0/1 is supported.

For example, delta-MCS transmission may be defined in the UE Capability that only delta-MCS transmission is supported in PF0/1. delta-MCS transmission may be specified in the UE Capability that transmission (multiplexing) with HARQ-ACK is supported in PF0/1. delta-MCS transmission may be specified in the UE Capability that transmission (multiplexing) with SR is supported in PF0/1.

For example, delta-MCS transmission may be defined in UE Capability that 1-bit delta-MCS transmission and 1-bit HARQ-ACK transmission are supported in PF0/1. For delta-MCS transmission, UE Capability may define that 2-bit delta-MCS transmission and 1-bit HARQ-ACK transmission are supported in PF0/1. delta-MCS transmission may be specified in the UE Capability that 1-bit delta-MCS transmission and 2-bit HARQ-ACK transmission are supported in PF0/1.

<Proposal 1: mapping rule of delta-MCS on PF0/1 only>
<On PF0>
The terminal may map delta-MCS to PUCCH resources of PF0 without multiplexing with other UCI (eg, HARQ-ACK and/or SR) using the following rules.

<Opt.1>
The terminal may use (reuse) the mapping rule of HARQ-ACK to the PUCCH resource of PF0. For example, the terminal may map delta-MCS to the PUCCH resource of PF0 based on the same rule as the mapping rule of HARQ-ACK to the PUCCH resource of PF0 described in FIG.

Fig. 5 is a diagram showing an example of Opt.1 in PF0 of Proposal 1. The terminal may determine m_cs based on the value of delta-MCS transmitted to the base station.

For example, when delta-MCS is indicated by 1 bit and delta-MCS of "0" is transmitted to the base station, the terminal may determine m_cs=0. Also, when the delta-MCS is indicated by 1 bit and a delta-MCS of "1" is transmitted to the base station, the terminal may determine m_cs=6.

Also, for example, when delta-MCS is indicated by 2 bits and delta-MCS of "00" is transmitted to the base station, the terminal may determine m_cs=0. Also, when the delta-MCS is indicated by 2 bits and the delta-MCS of "01" is transmitted to the base station, the terminal may determine m_cs=3.

<Opt.2>
The terminal may use a new rule to map delta-MCS to the PUCCH resource of PF0 without multiplexing it with other UCIs. For example, the terminal may use a different rule for mapping HARQ-ACK to PUCCH resources of PF0.

Fig. 6 is a diagram showing an example of Opt.2 in PF0 of Proposal 1. The terminal may determine m_cs based on the value of delta-MCS transmitted to the base station.

For example, when delta-MCS is indicated by 1 bit and delta-MCS of "0" is transmitted to the base station, the terminal may determine m_cs=3. Also, when the delta-MCS is indicated by 1 bit and a delta-MCS of "1" is transmitted to the base station, the terminal may determine m_cs=9.

Also, for example, when delta-MCS is indicated by 2 bits and delta-MCS of "00" is transmitted to the base station, the terminal may determine m_cs=1. Also, when the delta-MCS is indicated by 2 bits and the delta-MCS of "01" is transmitted to the base station, the terminal may determine m_cs=4.

It should be noted that the terminal may decide whether to apply Opt.1 or Opt.2 based on UE Capability and/or RRC parameters.

<On PF1>
<Opt.1>
The terminal may use (reuse) the mapping rule of HARQ-ACK to the PUCCH resource of PF1. For example, the terminal may map delta-MCS to the PUCCH resource of PF1 based on the same rule as the mapping rule of HARQ-ACK to the PUCCH resource of PF1 described in FIG.

Fig. 7 is a diagram showing an example of Opt.1 in PF1 of Proposal 1. The terminal may determine UCI d(0) based on the value of delta-MCS transmitted to the base station. For example, if the delta-MCS is indicated by 1 bit, the terminal may determine the binary phase-shift keying (BPSK) signal point (UCI d(0)) based on the 1-bit delta-MCS. . If the delta-MCS is indicated by 2 bits, the terminal may determine the quadrature phase shift keying (QPSK) signal point (UCI d(0)) based on the 2-bit delta-MCS.

<Proposal 2: Delta-MCS of PF0 with other UCI of PF0>
<Opt.1>
The terminal may multiplex the delta-MCS in PF0 with other UCI in PF0 and map it to the PUCCH resource of PF0. For example, when the transmission timing of delta-MCS in PF0 and the transmission timing of another UCI in PF0 overlap (collide), the terminal multiplexes the delta-MCS in PF0 and the other UCI in PF0. , may be mapped to the PUCCH resource of PF0.

Note that the terminal uses (reuses) the mapping rule of HARQ-ACK and SR to the PUCCH resource of PF0 for the mapping rule of delta-MCS and other UCI to the PUCCH resource of PF0. may

<Opt.2>
The terminal may drop the delta-MCS in PF0 when the transmission timing of delta-MCS in PF0 overlaps with the transmission timing of another UCI in PF0. For example, the terminal may not map delta-MCS to the PUCCH resource of PF0 and map other UCI to the PUCCH resource of PF0.

<Opt.3>, <Opt.4>
If the transmission timing of delta-MCS in PF0 overlaps with the transmission timing of another UCI in PF0, the terminal may drop the other UCI. For example, the terminal may map delta-MCS to the PUCCH resource of PF0 without mapping other UCIs to the PUCCH resource of PF0.

Fig. 8 is a diagram showing an example of Proposal 2. FIG. 8 shows an operation example of a terminal when the transmission timing of 1-bit delta-MCS in PF0 overlaps with the transmission timing of another UCI in PF0. Also, FIG. 8 shows an operation example of a terminal when the transmission timing of 2-bit delta-MCS in PF0 overlaps with the transmission timing of another UCI in PF0. Opt.1-1 to Opt.1-6 shown in FIG. 8 are derivatives of <Opt.1> above. Opt.2 to Opt.4 shown in FIG. 8 correspond to <Opt.2> to <Opt.4> above.

Opt.1-1 to Opt.1-6, which are derived from Opt.1, will be explained below.

<Opt.1-1>
FIG. 9 is a diagram showing an example of Opt.1-1 of Proposal 2. FIG. As shown in FIG. 9, 1-bit delta-MCS and 1-bit HARQ-ACK may be multiplexed.

For example, when HARQ-ACK is "0" and delta-MCS is "0", the terminal may determine m_cs=0. Also, when HARQ-ACK is '1' and delta-MCS is '0', the terminal may determine m_cs=3.

<Opt.1-2>
FIG. 10 is a diagram showing an example of Opt.1-2 of Proposal 2. FIG. As shown in FIG. 10, 1-bit delta-MCS and 2-bit HARQ-ACK may be multiplexed.

For example, when HARQ-ACK is "00" and delta-MCS is "0", the terminal may determine m_cs=0. Also, when HARQ-ACK is '01' and delta-MCS is '0', the terminal may determine m_cs=3.

<Opt.1-3>
FIG. 11 is a diagram showing an example of Opt.1-3 of Proposal 2. FIG. As shown in FIG. 11, 1-bit SR and 1-bit delta-MCS may be multiplexed.

For example, if SR is "0" and delta-MCS is "0", the terminal may determine m_cs=0. Also, when SR is '1' and delta-MCS is '0', the terminal may determine m_cs=3.

<Opt.1-4>
FIG. 12 is a diagram showing an example of Opt.1-4 of Proposal 2. FIG. As shown in FIG. 12, 1-bit HARQ-ACK, 1-bit SR, and 1-bit delta-MCS may be multiplexed.

For example, when HARQ-ACK is "0", SR is "0", and delta-MCS is "0", the terminal may determine m_cs=0. Also, when HARQ-ACK is '1', SR is '0', and delta-MCS is '0', the terminal may determine m_cs=3.

<Opt.1-5>
FIG. 13 is a diagram showing an example of Opt.1-5 of Proposal 2. FIG. As shown in FIG. 13, 1-bit HARQ-ACK and 2-bit delta-MCS may be multiplexed.

For example, when HARQ-ACK is "0" and delta-MCS is "00", the terminal may determine m_cs=0. Also, when HARQ-ACK is '0' and delta-MCS is '01', the terminal may determine m_cs=3.

<Opt.1-6>
14 is a diagram showing an example of Opt.1-6 of Proposal 2. FIG. As shown in FIG. 14, 1-bit SR and 2-bit delta-MCS may be multiplexed.

For example, if SR is "0" and delta-MCS is "00", the terminal may determine m_cs=0. Also, when SR is '0' and delta-MCS is '01', the terminal may determine m_cs=3.

Return to the description of Fig. 8.

<Case 1a: Case where the transmission timing of 1-bit delta-MCS overlaps with the transmission timing of 1-bit HARQ-ACK>
The terminal may multiplex 1-bit delta-MCS and 1-bit HARQ-ACK in case 1a. For example, the terminal may apply Opt.1-1 described in FIG. 9 to multiplex 1-bit delta-MCS and 1-bit HARQ-ACK.

Also, the terminal may apply Opt.2 in Case 1a. For example, the terminal may drop delta-MCS.

Also, the terminal may apply Opt.3. For example, the terminal may drop 1-bit HARQ-ACK.

Note that, when applying Opt.3, if the downlink signal reception result is NACK, the terminal may drop HARQ-ACK and transmit delta-MCS to the base station.

<Case 2a: Case where the transmission timing of 1-bit delta-MCS and the transmission timing of 2-bit HARQ-ACK overlap>
The terminal may multiplex 1-bit delta-MCS and 2-bit HARQ-ACK in case 2a. For example, the terminal may apply Opt.1-2 described in FIG. 10 to multiplex 1-bit delta-MCS and 2-bit HARQ-ACK.

In addition, the terminal may apply Opt.2 in Case 2a. For example, the terminal may drop delta-MCS.

<Case 3a: Case where the transmission timing of 1-bit delta-MCS overlaps with the transmission timing of 1-bit SR>
The terminal may multiplex 1-bit delta-MCS and 1-bit SR in case 3a. For example, the terminal may apply Opt.1-3 described in FIG. 11 to multiplex 1-bit delta-MCS and 1-bit SR.

Also, the terminal may apply Opt.2 in Case 3a. For example, the terminal may drop delta-MCS.

<Case 4a: Case where the transmission timing of 1-bit delta-MCS, the transmission timing of 1-bit HARQ-ACK, and the transmission timing of 1-bit SR overlap>
In Case 4a, the terminal may multiplex 1-bit delta-MCS, 1-bit HARQ-ACK, and 1-bit SR. For example, the terminal may apply Opt.1-4 described in FIG. 12 and multiplex 1-bit delta-MCS, 1-bit HARQ-ACK, and 1-bit SR.

Also, the terminal may apply Opt.2 in Case 4a. For example, the terminal may drop delta-MCS. In this case, the terminal may multiplex 1-bit HARQ-ACK and 1-bit SR.

Also, the terminal may apply Opt.3 in case 4a. For example, the terminal may drop the SR. In this case, the terminal may multiplex 1-bit delta-MCS and 1-bit HARQ-ACK. For example, the terminal may apply Opt.1-1 or 1-2 described in FIG. 9 to multiplex 1-bit delta-MCS and 1-bit HARQ-ACK.

In addition, the terminal may apply Opt.4 in case 4a. For example, the terminal may drop HARQ-ACK. In this case, the terminal may multiplex 1-bit delta-MCS and 1-bit SR. For example, the terminal may apply Opt.1-3 described in FIG. 11 and multiplex 1-bit delta-MCS and 1-bit HARQ-ACK.

<Case 5a: Case where the transmission timing of 1-bit delta-MCS, the transmission timing of 2-bit HARQ-ACK, and the transmission timing of 1-bit SR overlap>
The terminal may apply Opt.2 and drop the delta-MCS in Case 5a. The terminal may multiplex 2-bit HARQ-ACK and 1-bit SR in Case 5a.

Also, in Case 5a, the terminal may apply Opt.3 and drop the SR. The terminal may multiplex 1-bit delta-MCS and 2-bit HARQ-ACK in case 5a. In this case, the terminal may apply Opt.1-2 described in FIG. 10 and multiplex 2-bit HARQ-ACK and 1-bit delta-MCS.

Also, in Case 5a, the terminal may apply Opt.4 and drop the HARQ-ACK. The terminal may multiplex 1-bit delta-MCS and 1-bit SR in case 5a. In this case, the terminal may apply Opt.1-3 described in FIG. 11 to multiplex 1-bit delta-MCS and 1-bit SR.

<Case 1b: Case where the transmission timing of 2-bit delta-MCS and the transmission timing of 1-bit HARQ-ACK overlap>
The terminal may multiplex 2-bit delta-MCS and 1-bit HARQ-ACK in case 1b. For example, the terminal may apply Opt.1-5 described in FIG. 13 and multiplex 2-bit delta-MCS and 1-bit HARQ-ACK.

Also, the terminal may apply Opt.2 in case 1b. For example, the terminal may drop delta-MCS.

<Case 2b: Case where the transmission timing of 2-bit delta-MCS and the transmission timing of 2-bit HARQ-ACK overlap>
The terminal may apply Opt.2 and drop the delta-MCS in case 2b.

Also, in case 2b, the terminal may apply Opt.3 and drop the HARQ-ACK.

Note that, when applying Opt.3 and dropping HARQ-ACK, if the reception result of the downlink signal is NACK, the terminal drops HARQ-ACK and transmits delta-MCS to the base station. may

<Case 3b: Case where the transmission timing of 2-bit delta-MCS and the transmission timing of 1-bit SR overlap>
The terminal may multiplex 2-bit delta-MCS and 1-bit SR in case 3b. For example, the terminal may apply Opt.1-6 described in FIG. 14 and multiplex 2-bit delta-MCS and 1-bit SR.

Also, in case 3b, the terminal may apply Opt.2 and drop the delta-MCS.

<Case 4b: Case where the transmission timing of 2-bit delta-MCS, the transmission timing of 1-bit HARQ-ACK, and the transmission timing of 1-bit SR overlap>
The terminal may apply Opt.2 and drop the delta-MCS in case 4b.

Also, in case 4b, the terminal may apply Opt.3 and drop the SR. In this case, the terminal may multiplex 2-bit delta-MCS and 1-bit HARQ-ACK. For example, the terminal may apply Opt.1-5 described in FIG. 13 and multiplex 2-bit delta-MCS and 1-bit HARQ-ACK.

Also, in case 4b, the terminal may apply Opt.4 and drop the HARQ-ACK. In this case, the terminal may multiplex 2-bit delta-MCS and 1-bit SR.

Note that, when applying Opt.4 and dropping HARQ-ACK, if the reception result of the downlink signal is NACK, the terminal drops HARQ-ACK and transmits delta-MCS to the base station. may

<Case 5b: Case where the transmission timing of 2-bit delta-MCS, the transmission timing of 2-bit HARQ-ACK, and the transmission timing of 1-bit SR overlap>
The terminal may apply Opt.2 and drop the delta-MCS in Case 5b. The terminal may multiplex 2-bit HARQ-ACK and 1-bit SR in case 5b.

Also, in case 5b, the terminal may apply Opt.3 and drop the HARQ-ACK. The terminal may multiplex 1-bit delta-MCS and 1-bit SR in case 5b. In this case, the terminal may apply Opt.1-6 described in FIG. 14 to multiplex 2-bit delta-MCS and 1-bit SR.

<Proposal 3: Delta-MCS of PF1 with other UCI of PF1>
The terminal may multiplex the delta-MCS in PF1 with other UCI in PF1 and map it to the PUCCH resource of PF1. For example, when the transmission timing of delta-MCS in PF1 and the transmission timing of another UCI in PF1 overlap, the terminal multiplexes the delta-MCS in PF1 and the other UCI in PF1, and uses the PUCCH resource of PF1. can be mapped to FIG. 15 is a diagram showing an example of Proposal 3. FIG.

<Case 1: Case where the transmission timing of delta-MCS and the transmission timing of HARQ-ACK overlap>
<Opt.1>
The terminal determines PUCCH resources to be used for transmitting delta-MCS and HARQ-ACK.

<Alt.1>
A terminal may select a PUCCH resource based on whether delta-MCS has delta information.

For example, when delta-MCS has delta information, the terminal uses PUCCH resources for delta-MCS transmission to transmit HARQ-ACK to the base station. On the other hand, when the delta-MCS does not have delta information, the terminal uses PUCCH resources for HARQ-ACK transmission to transmit HARQ-ACK to the base station.

More specifically, if the delta information has a delta value such as "-1" (if there is delta information), the terminal uses the PUCCH resource for delta-MCS transmission, HARQ-ACK to the base station Send. On the other hand, when the delta information has a delta value such as "0" (when there is no delta information), the terminal uses PUCCH resources for HARQ-ACK transmission to transmit HARQ-ACK to the base station. .

Note that the terminal may select PUCCH resources based on the delta value. For example, the terminal may select PUCCH resources based on delta values such as '-1' and '1'. For example, if the current MCS is greater than the desired MCS, the terminal determines a delta value of '-1' and uses PUCCH resources corresponding to the delta value of '-1' to transmit HARQ-ACK. may If the current MCS is less than the desired MCS, the terminal may determine a delta value of '1' and transmit HARQ-ACK using PUCCH resources corresponding to the delta value of '1'.

<Alt.2>
The terminal may select PUCCH resources based on whether HARQ-ACK is ACK (or NACK).

For example, when HARQ-ACK is ACK (or NACK), the terminal uses PUCCH resources for HARQ-ACK transmission to transmit HARQ-ACK to the base station. On the other hand, if the HARQ-ACK is NACK (or ACK), the terminal uses PUCCH resources for delta-MCS transmission to transmit HARQ-ACK to the base station.

　In Opt.1, either Delta-MCS or HARQ-ACK is 1 bit.

<Opt.2>
The terminal may drop the delta-MCS and send HARQ-ACK to the base station.

<Opt.3>
The terminal may drop HARQ-ACK and send delta-MCS to the base station.

<Case 2: Case where delta-MCS transmission timing and SR transmission timing overlap>
<Opt.1>
The terminal determines PUCCH resources to be used for transmitting delta-MCS and SR.

For example, the terminal determines PUCCH resources to be used for delta-MCS transmission depending on whether the SR is positive SR or negative SR.

More specifically, when the terminal transmits delta-MCS and positive SR to the base station, it uses PUCCH resources for SR transmission to transmit delta-MCS to the base station. When transmitting delta-MCS and negative SR to the base station, the terminal uses PUCCH resources for delta-MCS transmission to transmit delta-MCS to the base station.

<Opt.2>
The terminal may drop the SR and send the delta-MCS to the base station.

<Opt.3>
The terminal may drop delta-MCS and send SR to the base station.

<Opt.1>
The terminal may drop the delta-MCS and send HARQ-ACK and SR to the base station (eg, see FIG. 4).

<Opt.2>
The terminal may drop the SR and send HARQ-ACK and delta-MCS to the base station. For example, the terminal may apply Option 1 of case 1 and transmit HARQ-ACK and SR to the base station.

<Opt.3>
The terminal may drop HARQ-ACK and send delta-MCS and SR to the base station. For example, the terminal may apply Option 1 of case 2 and transmit delta-MCS and SR to the base station.

<Proposal 4: Delta-MCS of PF0 with other UCI of PF1>
The terminal may multiplex the delta-MCS in PF0 with other UCIs in PF1 and map them to PUCCH resources in PF0/1. For example, when the transmission timing of delta-MCS in PF0 and the transmission timing of another UCI in PF1 overlap, the terminal multiplexes the delta-MCS in PF0 and the other UCI in PF1, and It may be mapped to a PUCCH resource. FIG. 16 is a diagram showing an example of Proposal 4. FIG.

<Case 1: Case where the transmission timing of delta-MCS and the transmission timing of HARQ-ACK overlap>
<Opt.1>
The terminal may multiplex delta-MCS and HARQ-ACK and map them to PUCCH resources in PF0. In this case, the terminal may apply any of Opt.1-1, Opt.1-2, and Opt.1-5 described in Proposal 2.

<Opt.2>
The terminal may multiplex delta-MCS and HARQ-ACK and map them to PUCCH resources in PF1. In this case, the terminal may apply either Alt.1 or Alt.2 of Opt.1 in Case 1 described in Proposal 3.

<Opt.3>
The terminal may drop delta-MCS and map HARQ-ACK to PUCCH resources in PF1.

<Opt.4>
The terminal may drop HARQ-ACK and map delta-MCS to PUCCH resources in PF0.

<Case 2: Case where delta-MCS transmission timing and SR transmission timing overlap>
<Opt.1>
The terminal may multiplex delta-MCS and SR and map them to PUCCH resources in PF0. In this case, the terminal may apply either Opt.1-3 or Opt.1-6 described in Proposal 2.

<Opt.2>
The terminal may multiplex delta-MCS and SR and map them to PUCCH resources in PF1. In this case, the terminal may apply Opt.1 in Case 2 described in Proposal 3.

<Opt.3>
The terminal may drop SR and map delta-MCS to PUCCH resources in PF0.

<Opt.4>
The terminal may drop delta-MCS and map SR to PUCCH resources in PF1.

<Case 3: Case where the delta-MCS transmission timing, the HARQ-ACK transmission timing, and the SR transmission timing overlap>
<Opt.1>
The terminal may multiplex delta-MCS, HARQ-ACK, and SR and map them to PUCCH resources in PF0. In this case, the terminal may apply any of Cases 4a, 4b, 5a, and 5b described in Proposal 2.

<Opt.2>
The terminal may multiplex delta-MCS, HARQ-ACK, and SR and map them to PUCCH resources in PF1. In this case, the terminal may apply Case 3 described in Proposal 3.

<Opt.3>
The terminal may drop delta-MCS, multiplex HARQ-ACK and SR, and map them to PUCCH resources in PF1.

<Opt.4>
The terminal may drop HARQ-ACK and SR and map delta-MCS to PUCCH resources in PF0.

<Proposal 5: Delta-MCS of PF1 with other UCI of PF0>
The terminal may multiplex delta-MCS in PF1 with other UCIs in PF0 and map them to PUCCH resources in PF0/1. For example, when the transmission timing of delta-MCS in PF1 and the transmission timing of another UCI in PF0 overlap, the terminal multiplexes the delta-MCS in PF1 and the other UCI in PF0, and It may be mapped to a PUCCH resource. 17 is a diagram showing an example of Proposal 5. FIG.

<Opt.3>
The terminal may drop delta-MCS and map HARQ-ACK to PUCCH resources in PF0.

<Opt.4>
The terminal may drop HARQ-ACK and map delta-MCS to PUCCH resources in PF1.

<Opt.3>
The terminal may drop SR and map delta-MCS to PUCCH resources in PF1.

<Opt.4>
The terminal may drop delta-MCS and map SR to PUCCH resources in PF0.

<Variation>
The functionality of each Opt described above may be signaled using higher layer signaling.

The terminal may notify the Opt that can be used as UE Capability.

The Opts that can be used by the terminal may be determined in the specifications.

The function of each Opt described above is notified using higher layer signaling, and the terminal may notify the Opt that can be used as UE Capability.

Also, the number of bits of delta-MCS is not limited to the above example. For example, the number of bits of delta-MCS may be 3 bits.

<Example of wireless communication system>
FIG. 18 is a diagram showing an example of a wireless communication system 10 according to one embodiment. The radio communication system 10 may be a radio communication system according to New Radio (NR). Exemplarily, the wireless communication system 10 may be a wireless communication system according to a scheme called URLLC and/or Industrial Internet of Things (IIoT). The radio communication system 10 may include a Next Generation-Radio Access Network 20 (hereinafter referred to as NG-RAN 20) and a terminal 200.

Note that the wireless communication system 10 may be a wireless communication system that conforms to (or conforms to) a scheme called 5G, Beyond 5G, 5G Evolution, or 6G. Also, the wireless communication system 10 may be a system of a generation after 6G.

NG-RAN 20 includes base stations 100 (base station 100A and base station 100B). The number of base stations 100 and the number of terminals 200 are not limited to the example shown in FIG.

The NG-RAN 20 includes multiple NG-RAN Nodes, such as gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). NG-RAN 20 and 5GC may simply be referred to as a "network".

The base station 100 may also be called an NG-RAN Node, ng-eNB, eNodeB (eNB), or gNodeB (gNB). Terminal 200 may be called User Equipment (UE). Also, base station 100 may be regarded as a device included in a network to which terminal 200 connects.

The base station 100 performs wireless communication with the terminal 200. For example, the wireless communication performed complies with NR. At least one of the base station 100 and the terminal 200 uses Massive MIMO (Multiple-Input Multiple-Output) to generate beams (BM) with higher directivity by controlling radio signals transmitted from a plurality of antenna elements. You can respond. Also, at least one of base station 100 and terminal 200 may support carrier aggregation (CA) in which multiple component carriers (CC) are bundled and used. Also, at least one of the base station 100 and the terminal 200 may support dual connectivity (DC), etc., in which communication is performed between the terminal 200 and each of the plurality of base stations 100 .

The wireless communication system 10 may support multiple frequency bands. For example, wireless communication system 10 supports Frequency Ranges (FR) 1 and FR2. The frequency bands of each FR are, for example, as follows.
・FR1: 410MHz to 7.125GHz
・FR2: 24.25GHz to 52.6GHz

In FR1, Sub-Carrier Spacing (SCS) of 15 kHz, 30 kHz or 60 kHz may be used, and a bandwidth (BW) of 5 MHz to 100 MHz may be used. FR2 is, for example, a higher frequency than FR1. FR2 may use an SCS of 60 kHz or 120 kHz and a bandwidth (BW) of 50 MHz to 400 MHz. Also, FR2 may include a 240 kHz SCS.

The wireless communication system 10 according to the present embodiment may support a frequency band higher than the FR2 frequency band. For example, the wireless communication system 10 in this embodiment can support frequency bands exceeding 52.6 GHz and up to 114.25 GHz. Such high frequency bands may be referred to as "FR2x."

Also, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM)/Discrete Fourier Transform - Spread - Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) with larger Sub-Carrier Spacing (SCS) than the above example is applied. may Also, DFT-S-OFDM may be applied to both uplink and downlink, or may be applied to either one.

In the radio communication system 10, a time division duplex (TDD) slot configuration pattern may be set. For example, DDDSU (D: downlink (DL) symbol, S: DL/uplink (UL) or guard symbol, U: UL symbol) may be defined (see 3GPP TS38.101-4).

Further, in the radio communication system 10, channel estimation of PUSCH (or PUCCH (Physical Uplink Control Channel)) can be performed using a demodulation reference signal (DMRS) for each slot. can be used to perform channel estimation for PUSCH (or PUCCH). Such channel estimation may be called joint channel estimation. Alternatively, it may be called by another name such as cross-slot channel estimation.

Terminal 200 may transmit DMRS assigned to (spanning over) multiple slots so that base station 100 can perform joint channel estimation using DMRS.

Also, in the radio communication system 10, an enhanced function may be added to the feedback function from the terminal 200 to the base station 100. For example, enhanced functionality of terminal feedback for HARQ-ACK and enhanced functionality of CSI feedback for more accurate MCS selection may be added.

Next, configurations of the base station 100 and the terminal 200 will be described. The configurations of base station 100 and terminal 200 described below are examples of functions related to the present embodiment. Base station 100 and terminal 200 may have functions not shown. Also, the functional division and/or the name of the functional unit are not limited as long as the function executes the operation according to the present embodiment.

<Configuration of base station>
FIG. 19 is a block diagram showing an example of the configuration of base station 100 according to this embodiment. The base station 100 may include a transmitter 101, a receiver 102, and a controller 103, for example. Base station 100 wirelessly communicates with terminal 200 (see FIG. 20).

The transmission section 101 transmits a downlink (DL) signal to the terminal 200 . For example, the transmitter 101 transmits a DL signal under the control of the controller 103 .

A DL signal may include, for example, a downlink data signal and control information (eg, Downlink Control Information (DCI)). Also, the DL signal may include information (for example, UL grant) indicating scheduling regarding signal transmission of terminal 200 . Also, the DL signal may include higher layer control information (for example, Radio Resource Control (RRC) control information). Also, the DL signal may include a reference signal.

Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channel may include a PDSCH (Physical Downlink Shared Channel), and the control channel may include a PDCCH (Physical Downlink Control Channel). For example, base station 100 transmits control information to terminal 200 using PDCCH, and transmits downlink data signals using PDSCH.

Examples of reference signals included in DL signals include demodulation reference signals (DMRS), phase tracking reference signals (PTRS), channel state information-reference signals (CSI-RS), sounding reference signals (SRS ), and Positioning Reference Signal (PRS) for position information. For example, reference signals such as DMRS and PTRS are used for demodulation of downlink data signals and transmitted using PDSCH.

The receiving unit 102 receives an uplink (UL) signal transmitted from the terminal 200. For example, the receiving unit 102 receives the UL signal under the control of the control unit 103.

The control unit 103 controls the communication operation of the base station 100, including the transmission processing of the transmission unit 101 and the reception processing of the reception unit 102.

For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmission unit 101 . Control section 103 also outputs the data received from receiving section 102, control information, and the like to an upper layer.

For example, the control unit 103 allocates resources (or channels) used for transmitting/receiving DL signals and/or resources used for transmitting/receiving UL signals. Information about allocated resources may be included in control information to be transmitted to terminal 200 .

The control section 103 may configure a plurality of PUCCH resource sets as an example of allocation of resources used for transmission and reception of UL signals. Information on the configured multiple PUCCH resource sets may be notified to terminal 200 by RRC.

<Device configuration>
FIG. 20 is a block diagram showing an example of the configuration of terminal 200 according to this embodiment. The terminal 200 may include a receiver 201, a transmitter 202, and a controller 203, for example. The terminal 200 wirelessly communicates with the base station 100, for example.

The receiving unit 201 receives the DL signal transmitted from the base station 100. For example, the receiver 201 receives a DL signal under the control of the controller 203 .

The transmission unit 202 transmits the UL signal to the base station 100. For example, the transmitter 202 transmits UL signals under the control of the controller 203 .

The UL signal may include, for example, an uplink data signal and control information (eg, UCI). For example, information about the processing capability of terminal 200 (eg, UE capability) may be included. Also, the UL signal may include a reference signal.

Channels used to transmit UL signals include, for example, data channels and control channels. For example, the data channel includes PUSCH (Physical Uplink Shared Channel), and the control channel includes PUCCH (Physical Uplink Control Channel). For example, terminal 200 receives control information from base station 100 using PUCCH, and transmits uplink data signals using PUSCH.

The reference signal included in the UL signal may include at least one of DMRS, PTRS, CSI-RS, SRS, and PRS, for example. For example, reference signals such as DMRS and PTRS are used for demodulation of uplink data signals and transmitted using PUSCH.

The control unit 203 controls communication operations of the terminal 200, including reception processing in the reception unit 201 and transmission processing in the transmission unit 202.

For example, the control unit 203 acquires information such as data and control information from the upper layer and outputs it to the transmission unit 202 . Also, the control unit 203 outputs, for example, the data and control information received from the receiving unit 201 to the upper layer.

For example, the control unit 203 controls transmission of information to be fed back to the base station 100 . Information fed back to the base station 100 may include, for example, HARQ-ACK and/or delta-MCS. Information to be fed back to the base station 100 may be included in the UCI. UCI is transmitted on PUCCH resources.

The control section 203 sets a plurality of PUCCH resource sets based on the control information received from the base station 100, and selects at least one PUCCH resource set from among the plurality of PUCCH resource sets. Then, control section 203 determines PUCCH resources to be used for transmitting information to be fed back to base station 100 from among the resources of the selected PUCCH resource set. Under the control of control section 203 , transmission section 202 transmits information to be fed back to base station 100 on the PUCCH resource determined by control section 203 .

Also, for example, in UL transmission, the control unit 203 may determine the priority of information on MCS (eg, delta-MCS) with respect to feedback information on DL data reception. The transmission section 202 may perform UL transmission according to the priority determined by the control section 203, for example.

Note that the channels used for DL transmission and the channels used for UL transmission are not limited to the above examples. For example, channels used for DL transmissions and channels used for UL transmissions may include Random Access Channel (RACH) and Physical Broadcast Channel (PBCH). RACH may be used, for example, to transmit DCI including Random Access Radio Network Temporary Identifier (RA-RNTI).

The control unit 203 may determine the PUCCH format (PF0/1) for transmitting information on MCS based on one or both of the notification in RRC and UE Capability. The information about MCS may be, for example, MCS difference information such as delta-MCS. The MCS difference information may be, for example, difference information between a first MCS value and a second MCS value determined before the first MCS. In other words, the MCS difference information may be difference information between the first MCS value determined at the first timing and the second MCS value determined at the second timing. Transmitting section 202 may transmit information on MCS (delta-MCS) using PUCCH in the format determined by control section 203 .

The control section 203 may determine the cyclic shift value based on the delta-MCS, and map the base sequence cyclically shifted by the determined cyclic shift value to the uplink control signal PUCCH resource.

In addition to delta-MCS, the control unit 203 may also determine the cyclic shift value based on another UCI.

Control section 203 uses a signal based on delta-MCS (UCI d (0)) mapped on the IQ plane, base sequence, m ₀ notified in RRC, and TD-OCC as PUCCH resources. can be mapped to

The control section 203 may determine the PUCCH resource to which the signal is mapped, or may determine the PUCCH resource to which the other UCI is mapped, based on another UCI.

According to the present embodiment described above, for example, the terminal can appropriately determine the format of the uplink control signal used for transmission of uplink control information to be transmitted to the base station. Therefore, for example, it contributes to improvement in delay reduction of uplink control signals and contributes to improvement in reliability.

This concludes the explanation of the present disclosure.

<Hardware configuration, etc.>
It should be noted that the block diagrams used in the description of the above embodiments show blocks in units of functions. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices. A functional block may be implemented by combining software in the one device or the plurality of devices.

Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't For example, a functional block (component) that makes transmission work is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.

For example, a base station, a terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 21 is a diagram illustrating an example of hardware configurations of a base station and terminals according to an embodiment of the present disclosure. The base station 100 and terminal 200 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the term "apparatus" can be read as a circuit, device, unit, or the like. The hardware configuration of base station 100 and terminal 200 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.

Each function of the base station 100 and the terminal 200 is implemented by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002 so that the processor 1001 performs calculations and controls communication by the communication device 1004. , and controlling at least one of reading and writing of data in the memory 1002 and the storage 1003 .

The processor 1001, for example, operates an operating system and controls the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, the control unit 103 and the control unit 203 described above may be implemented by the processor 1001 .

Also, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, the control unit 203 of the terminal 200 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly. Although it has been described that the above-described various processes are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. FIG. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one of, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and RAM (Random Access Memory). may be The memory 1002 may also be called a register, cache, main memory (main storage device), or the like. The memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

The storage 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, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like. Storage 1003 may also be called an auxiliary storage device. The storage medium described above may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003 .

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). may consist of For example, the transmitting unit 101, the receiving unit 102, the receiving unit 201, the transmitting unit 202, etc. described above may be realized by the communication device 1004. FIG.

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

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

In addition, the base station 100 and the terminal 200 include hardware such as microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), and FPGAs (Field Programmable Gate Arrays). , and part or all of each functional block may be implemented by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

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

<Applicable system>
Embodiments described in the present disclosure are LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system) , FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) , IEEE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, other suitable systems and next generations based on these It may be applied to at least one of the systems. Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).

<Processing procedure, etc.>
The processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.

<Base station operation>
Certain operations that are described in this disclosure as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes with a base station, various operations performed for communication with a terminal may be performed by the base station and other network nodes other than the base station (e.g. MME or S-GW, etc. (including but not limited to). Although the case where there is one network node other than the base station is exemplified above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

<Direction of input/output>
Information and the like (see the item <information, signal>) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.

<Handling of input/output information, etc.>
Input/output information and the like may be stored in a specific location (for example, memory), or may be managed using a management table. Input/output information and the like can be overwritten, updated, or appended. The output information and the like may be deleted. The entered information and the like may be transmitted to another device.

<Determination method>
The determination may be made by a value represented by one bit (0 or 1), by a true/false value (Boolean: true or false), or by numerical comparison (for example, a predetermined value).

<Variation of mode, etc.>
Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching according to execution. In addition, the notification of predetermined information (for example, notification of “being X”) is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be practiced with modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not meant to be limiting in any way.

<Software>
Software, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the software may use wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to access websites, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.

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

The terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, the channel and/or symbols may be signaling. A signal may also be a message. A component carrier (CC) may also be referred to as a carrier frequency, cell, frequency carrier, or the like.

<System, Network>
As used in this disclosure, the terms "system" and "network" are used interchangeably.

<Name of parameter and channel>
In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indexed.

The names used for the parameters described above are not restrictive names in any respect. Further, the formulas, etc., using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (e.g., 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 in no way restrictive names. is not.

<Base station>
In the present disclosure, "base station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", ""accesspoint","transmissionpoint","receptionpoint","transmission/receptionpoint","cell","sector","cellgroup"," Terms such as "carrier", "component carrier" may be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.

A base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being associated with a base station subsystem (e.g., an indoor small base station (RRH: The term "cell" or "sector" refers to part or all of the coverage area of at least one of the base stations and base station subsystems serving communication services in this coverage. point to

<Mobile station>
In this disclosure, terms such as “Mobile Station (MS),” “user terminal,” “User Equipment (UE),” “terminal,” etc. may be used interchangeably. .

A mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

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

Also, the base station in the present disclosure may be read as a terminal. For example, regarding a configuration in which communication between a base station and a terminal is replaced with communication between a plurality of terminals (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) , the embodiments of the present disclosure may be applied. In this case, terminal 200 may have the functions of base station 100 described above. Also, words such as "up" and "down" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be read as side channels.

Similarly, a terminal in the present disclosure may be read as a base station. In this case, the base station 100 may have the functions that the terminal 200 described above has.

<Meaning and Interpretation of Terms>
As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Judgement", "determining" are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as "judged" or "determined", and the like. Also, "judgment" and "decision" are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that something has been "determined" or "decided". In addition, "judgment" and "decision" are considered to be "judgment" and "decision" by resolving, selecting, choosing, establishing, comparing, etc. can contain. In other words, "judgment" and "decision" may include considering that some action is "judgment" and "decision". Also, "judgment (decision)" may be read as "assuming", "expecting", "considering", or the like.

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

<Reference signal>
The reference signal may be abbreviated as RS (Reference Signal), or may be referred to as Pilot according to the applicable standard.

<Meaning of "based on">
As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly specified otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

<“First”, “Second”>
Any reference to elements using the "first,""second," etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements can be employed or that the first element must precede the second element in any way.

<Means>
The “means” in the configuration of each device described above may be replaced with “unit”, “circuit”, “device”, or the like.

<Open format>
Where "include,""including," and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising." is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive OR.

<Time unit such as TTI, frequency unit such as RB, radio frame configuration>
A radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) independent of numerology.

A numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.

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

A slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot. PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.

Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.

For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, and one slot or minislot may be called a TTI. 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 Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.

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

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

When one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum scheduling time unit. Also, the number of slots (the 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 called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like. A TTI that is shorter than a regular TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and so on.

Note that the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms, and the short TTI (e.g., shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms A TTI having the above TTI length may be read instead.

A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve. The number of subcarriers included in an RB may be determined based on neumerology.

Also, the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long. One TTI, one subframe, etc. may each consist of one or more resource blocks.

One or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. may be called.

Also, a resource block may be composed of one or more resource elements (RE: Resource Element). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

A bandwidth part (BWP) (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier. good. Here, the common RB may be identified by an RB index based on 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 multiple BWPs may be configured for a UE within one carrier.

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

The structures such as radio frames, subframes, slots, minislots and symbols described above are only 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, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.

<Maximum transmission power>
“Maximum transmit power” as described in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may refer to the rated maximum transmit power ( the rated UE maximum transmit power).

<article>
In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include the plural nouns following these articles.

<"Different">
In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean that "A and B are different from C". Terms such as "separate,""coupled," etc. may also be interpreted in the same manner as "different."

One aspect of the present disclosure is useful for wireless communication systems.

10 wireless communication system 20 NG-RAN
100 base station 200

terminal

101, 202

transmitter

102, 201

receiver

103, 203 controller

Claims

a control unit that determines the format of an uplink control signal used for transmission of differential information of modulation and coding schemes based on one or both of notification in higher layer signaling and terminal capability;
a transmission unit that transmits the difference information using the uplink control signal in the determined format;
terminal with
The control unit determines a cyclic shift value based on the difference information, and maps a sequence cyclically shifted by the determined cyclic shift value to a resource of the uplink control signal.
A terminal according to claim 1 .
The control unit determines a cyclic shift value based on the difference information and the uplink control information.
A terminal according to claim 2.
The control unit maps a signal based on the difference information, the sequence, the cyclic shift value of the sequence notified in the higher layer signaling, and the orthogonal code to the resource of the uplink control signal.
A terminal according to claim 1 .
The control unit determines a resource of the uplink control signal to which the signal is mapped or a resource of the uplink control signal to which the uplink control information is mapped, based on uplink control information.
A terminal according to claim 4.
determining the format of the uplink control signal used for transmitting the differential information of the modulation and coding scheme based on one or both of the notification in the higher layer signaling and the terminal capability;
Transmitting the differential information using the uplink control signal in the determined format;
Communication method.