2F18384-PCT
`
`DESCRIPTION
`
`Title of Invention
`
`TERMINAL AND TRANSMISSION METHOD
`
`Technical Field
`
`[0001] The present disclosure relates to a terminal and a transmission method.
`
`Background Art
`
`[0002] New Radio access technology (NR) has been developed to provide the 5th
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`10
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`Generation mobile communication systems (5G) in the 3rd Generation Partnership Project
`
`(3GPP).
`
`Functions to support Ultra Reliable and Low Latency Communications (URLLC)
`
`as well as high-speed and large capacity communication, which are basic requirements of
`
`enhanced Mobile Broadband (eMBB), are main targets under study in NR (e.g., see Non-
`
`Patent Literatures (hereinafter, referred to as "NPL") 1 to 3).
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`15
`
`Citation List
`
`Non-Patent Literature
`
`[0003]
`
`NPL 1
`
`20
`
`3GPP TS 38.211 V15.1.0, "NR; Physical channels and modulation (Release 15),"
`
`2018-03
`
`NPL 2
`
`3GPP TS 38.212 V15.1.1, "NR; Multiplexing and channel coding (Release 15),"
`
`2018-04
`
`25
`
`NPL 3
`
`3GPP TS 38.213 V15.1.0, “NR; Physical layer procedure for control (Release 15),"
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`

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`2F18384-PCT
`
`2018-03
`
`NPL 4
`
`R1-1803359, “Summary of handling UL multiplexing of transmission with different
`
`reliability requirements,” vivo, RAN1#92, March 2018
`
`NPL 5
`
`R1-1803803,
`
`“UL multiplexing of
`
`transmissions with different
`
`reliability
`
`requirements,” ZTE, Sanechips, RAN 1#92bis, April 2018
`
`NPL 6
`
`R1-1804947,
`
`“Discussions
`
`on UL multiplexing,” Mitsubishi Electric Co.,
`
`10
`
`RAN1#92bis, April 2018
`
`NPL 7
`
`R1-1804572,
`
`“Discussion on multiplexing UL transmission with different
`
`requirements,” LG Electronics, RAN1#92bis, April 2018
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`15
`
`Summary of Invention
`
`[0004] Not enough studies have been carried out on a method of transmitting data of
`
`different services from one or a plurality of terminals, i.e., pieces of user equipment (UEs),
`
`in NR.
`
`[0005] An embodiment of the present disclosure facilitaes providing a base station, a
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`20
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`terminal, and a transmission method that enable the terminal to effectively transmit data of
`
`different services.
`
`[0006] A teminal according to one aspect of the present disclosure includes: a circuit that
`
`determines a transmission operation ofa first transmission, correspondingto a first service,
`
`and a secondtransmission, corresponding to a second service, based on thefirst transmission
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`25
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`and a setting of a reference signal included in the second transmission, and a transmitter that
`
`transmits an uplink signal including at least a signal of the first transmission based on the
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`

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`2F18384-PCT
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`determined transmission operation.
`
`[0007] A transmission method according to one aspect of the present disclosure includes:
`
`determining a transmission operation ofa first transmission, correspondingto a first service,
`
`and a secondtransmission, corresponding to a second service, based onthefirst transmission
`
`and a setting of a reference signal included in the second transmission, and transmitting an
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`uplink signal including at least a signal of the first transmission based on the determined
`
`transmission operation.
`
`[0008]
`
`It should be noted that general or specific embodiments may be implemented as a
`
`system, an apparatus, a method, an integrated circuit, a computer program or a recording
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`10
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`medium, or any selective combination of the system,
`
`the apparatus,
`
`the method,
`
`the
`
`integrated circuit, the computer program, and the recording medium.
`
`[0009] According to one exemplary embodiment of this disclosure, a terminal can
`
`efficiently transmit data of different services.
`
`[0010] Additional benefits and advantages of the disclosed exemplary embodiments will
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`15
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`become apparent from the specification and drawings. The benefits and/or advantages may
`
`be individually obtained by various embodiments and features of the specification and
`
`drawings, which need not all be provided in order to obtain one or more of such benefits
`
`and/or advantages.
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`20
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`Brief Description of Drawings
`
`[0011]
`
`FIG. 1 is a diagram illustrating an example in which transmissions corresponding to
`
`eMBB and URLLCsimultaneously occur in one terminal;
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`FIG. 2 is a diagram illustrating an example in which transmissions corresponding to
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`25
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`eMBB and URLLCsimultaneously occur in different terminals;
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`FIG. 3 is a diagram illustrating a transmission example in which eMBB and URLLC
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`2F18384-PCT
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`transmissions simultaneously occur;
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`FIG. 4 is a diagram illustrating another transmission example in which eMBB and
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`URLLCtransmissions simultaneously occur;
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`FIG. 5 is a diagram explaining phase discontinuity;
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`FIG. 6 is a block diagram illustrating a configuration of a part of a terminal according
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`to Embodiment 1;
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`FIG. 7 is a block diagram illustrating a configuration of a base station according to
`
`Embodiment1;
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`FIG. 8 is a block diagram illustrating a configuration of the terminal according to
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`10
`
`Embodiment 1;
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`FIG. 9 is a sequence diagram illustrating processes in the base station and the terminal
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`according to Embodiment 1;
`
`FIG. 10 is a diagram illustrating setting examples of Additional DMRSs;
`
`FIG. 11A is a diagram illustrating an exemplary uplink transmission according to
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`15
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`Embodiment 1;
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`FIG. 11B is a diagram illustrating a transmission example according to Embodiment
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`FIG. 12 is a diagram illustrating an exemplary uplink transmission according to
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`Option 1 of Embodiment 2;
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`20
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`FIG. 13A is a diagram illustrating an exemplary uplink transmission according to
`
`Option 2 of Embodiment 2;
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`FIG. 13B is a diagram illustrating another exemplary uplink transmission according
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`to Option 2 of Embodiment 2;
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`FIG. 14A is a diagram illustrating an exemplary uplink transmission according to
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`25
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`Option 3 of Embodiment2;
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`FIG. 14B is a diagram illustrating another exemplary uplink transmission according
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`2F18384-PCT
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`to Option 3 of Embodiment2;
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`FIG. 14C is a diagram illustrating still another exemplary uplink transmission
`
`according to Option 3 of Embodiment2;
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`FIG. 15A is a diagram illustrating an exemplary uplink transmission according to
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`Embodiment3;
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`FIG. 15B is a diagram illustrating another exemplary uplink transmission according
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`to Embodiment3;
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`FIG. 16 is a block diagram illustrating association between transmission symbols and
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`transmission operations according to Embodiment4;
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`10
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`FIG. 17A is a diagram illustrating an exemplary uplink transmission according to
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`Embodiment4;
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`FIG. 17B is a diagram illustrating another exemplary uplink transmission according
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`to Embodiment4;
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`FIG. 18 is a diagram illustrating an exemplary uplink transmission according to
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`15
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`Embodiment 5;
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`FIG. 19 is a sequence diagram illustrating processes in the base station and the
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`terminal in Inter-UE multiplexing;
`
`FIG. 20 is a diagram illustrating an exemplary Grant-free uplink transmission;
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`FIG. 21 is a sequence diagram illustrating processes in the base station and the
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`20
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`terminal in Grant-free URLLC; and
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`FIG. 22 is a diagram illustrating an example in which a transmission correspondingto
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`eMBBanda plurality of transmissions corresponding to URLLC occur.
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`Description of Embodiments
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`25
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`[0012] Hereinafter, a detailed description will be given of embodiments of the present
`
`disclosure with reference to the accompanying drawings.
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`

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`2F18384-PCT
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`[0013]
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`It is assumed, for example, that one terminal will be adaptive to a plurality of
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`services, such as eMBB and URLLC, in NR.
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`_Itis also assumedthat, for example, terminals
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`transmitting and receiving data of different services, such as eMBB and URLLC,will coexit
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`in a cell of NR (hereinafter, referred to as “NR cell”).
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`[0014] For example, in an uplink (UL) transmission as illustrated in FIGS.
`
`1 and 2, a
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`transmission corresponding to eMBB (hereinafter, may simply be referred to as "eMBB
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`transmission") and a transmission corresponding to URLLC (hereinafter, may simply be
`
`referred to as "URLLCtransmission") at times simultaneously occuror partially overlap in
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`time.
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`10
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`[0015]
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`FIG.
`
`1
`
`illustrates an example in which eMBB transmission and URLLC
`
`transmission simultaneously occur in one terminal.
`
`FIG. 2 illustrates an example in which
`
`eMBB transmission and URLLC transmission simultaneously occur between different
`
`terminals (e.g., VE] and UE2)inacell.
`
`[0016] When eMBBtransmission and URLLC transmission simultaneously occur in a
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`15
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`terminal as illustrated in FIG. 1, the terminal can simultaneously transmit both an eMBB
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`transmission signal (eMBB Physical Uplink Shared Channel (PUSCH)) and a URLLC
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`transmission signal
`
`(URLLC PUSCH) without
`
`taking the mutual
`
`influence into
`
`consideration as long as the terminal is capable of simultaneously transmitting a plurality of
`
`uplink signals (e.g.,¢oMBB PUSCH and URLLC PUSCH)andthe simultaneous transmission
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`20
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`of a plurality of uplink signals does not cause to exceed the maximum transmission power
`
`of the terminal.
`
`[0017]
`
`In FIG. 1, however, the terminal operates, for example, so as to transmit either one
`
`of the eMBB transmission signal or the URLLC transmission signal, or to control the
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`transmission power whenthe terminal cannot simultaneously transmit a plurality of uplink
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`25
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`signals, or when the total sum of the transmission power exceeds the maximum transmission
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`power even though the terminal is capable of simultaneously transmitting a plurality of
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`2F18384-PCT
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`uplink signals.
`
`[0018] Herein, it is defined as requirements of URLLC in 3GPPto ensure a user plane
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`latency of 0.5 ms or less on one way and a constantreliability, and achieve a latency of 1 ms
`
`or less.
`
`To meet such requirements of URLLC, the terminal, for example, prioritizes
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`URLLCtransmission over eMBBtransmission.
`
`[0019]
`
`In addition, when eMBBtransmission and URLLC transmission simultaneously
`
`occur between different terminals in a cell as illustrated in FIG. 2, each terminal can
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`simultaneously transmit both an eMBBtransmission signal (EeMBB PUSCH)and a URLLC
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`transmission signal
`
`(URLLC PUSCH) without
`
`taking the mutual
`
`influence into
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`10
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`consideration as long as different frequency resources are allocated to each terminal.
`
`[0020]
`
`In FIG. 2, however, a terminal operation is required so that one of these terminals
`
`transmits a signal or the transmission power is controlled when the frequency resources
`
`allocated to the terminals are the same or partially overlapped. At this time, URLLC
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`transmission (e.g.,
`
`the transmission of UE 2 in FIG. 2) is prioritized over the other
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`15
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`transmission operation of these terminals, for example, in order to meet the requirements of
`
`URLLCasdescribed above.
`
`[0021] Next, an example of a terminal operation that prioritizes URLLC transmission over
`
`eMBBtransmission will be described.
`
`[0022]
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`Studies have been carried out on giving priority to URLLC transmission and
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`20
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`canceling eMBB transmission in the section that URLLCtransmissionis interrupted and the
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`subsequent section in the eMBB transmission section (e.g.,
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`1 slot in FIG. 3) when, for
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`example, eMBB transmission and URLLCtransmission simultaneously occurasillustrated
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`in FIG. 3 (see, for example, NPL 4). This may deteriorate the transmission quality and the
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`frequencyutilization efficiency of eMBB while the transmission quality of URLLC can be
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`25
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`ensured.
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`[0023] Herein, it is assumedthat the main usecase is, for example, using a transmission in
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`2F18384-PCT
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`a slot unit (e.g., a transmission that uses one slot or most of the slot) since the amount of
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`transmission data is relatively large in eMBB transmission.
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`In contrast, it is assumed that
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`the main use case is, for example, using a transmission not in a slot unit (e.g., a transmission
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`that uses one to several symbols) since the amount of transmission data is relatively small
`
`and low latency is aimed in URLLC transmission.
`
`[0024] Assuming the above-mentioned use cases,
`
`the transmission section in which
`
`URLLCtransmission overlaps in time with eMBB transmission is, for example, a section
`
`corresponding to a part of eMBB transmissionsection (e.g., one to several symbols).
`
`[0025]
`
`In this regard, not in a methodillustrated in FIG. 3, the terminal does not perform
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`10
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`(discard) eMBB transmission in the section overlapping in time with the URLLC
`
`transmission section, for example, and performs eMBBtransmission in the section other than
`
`the section overlapping in time with the URLLC transmission section, as illustrated FIG. 4,
`
`thereby suppressing deterioration of the transmission quality and the frequencyutilization
`
`efficiency of eMBB. Note that the "process of discarding eMBBtransmission" maybe, for
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`15
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`example, a "process of dropping eMBBtransmission" or a "process of puncturing eMBB
`
`transmission signals".
`
`[0026]
`
`In eMBBtransmission, the part that overlaps in time with URLLC transmission (in
`
`other words, a losing signal) is not necessarily a data signal (e.g., a data symbol), and may
`
`also be a Demodulation Reference Signal (DMRS) of eMBBtransmission. The loss of
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`20
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`DMRSmaydeteriorate the channel estimation accuracy in the base station on the receiving
`
`side (may be referred to as gNB or eNB), and mayalso deteriorate the transmission quality
`
`of eMBB dueto the deterioration of channel estimation accuracy.
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`[0027] Further, the channel estimation process using DMRSand the demodulation process
`
`of data symbols using the channel estimate assume that there is no phase discontinuity of
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`25
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`transmission signals between DMRSandthe data symbols.
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`In general, it is not considered
`
`that the phase discontinuity of transmission signals occurs when the power or the center
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`2F18384-PCT
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`frequency of the Radio Frequency (RF)is not varied.
`
`[0028] When eMBBtransmission is discarded, however, in the part overlapping in time
`
`with URLLC transmission as illustrated in FIG. 4, for example, the transmission poweris
`
`changed in the eMBBtransmission section (e.g., the transmission powerturns to 0 in the part
`
`overlapping in time with URLLCtransmission). This case does not meet the condition
`
`described above that the phase discontinuity of transmission signals does not occur, and may
`
`cause the phase discontinuity of transmission signals in eMBBtransmission.
`
`[0029]
`
`Thus, even though no DMRS of eMBBtransmission is lost, for example, as
`
`illustrated in FIG. 5, the base station may not be able to demodulate the data symbols after
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`10
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`URLLCtransmission using DMRSthat has been transmitted prior to URLLC transmission
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`in eMBBtransmission, and may deteriorate the transmission quality ofeMBB.
`
`In this case,
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`it is effective, for example, to cancel eMBB transmission in the symbol where URLLC
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`transmission is interrupted and the symbols subsequent to the interruption (hereinafter,
`
`reffered to as “URLLC-transmission-interrupted and subsequent symbols”, e.g., the 8th and
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`15
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`subsequent symbols in FIG. 5) asillustrated in FIG.3.
`
`[0030]
`
`In this regard, NPL 5, for example, discloses a method in which a base station
`
`transmits a control signal (e.g., a Preemption Indication (PI)) for indicating that URLLC
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`transmission occurs in another terminal to a terminal performing eMBBtransmission, and
`
`indicates whether or not to cancel eMBB transmission in URLLC-transmission-interrupted
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`20
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`and subsequent symbols using the PI. The method disclosed in NPL 5, however, increases
`
`overhead of the control signal (e.g., PI).
`
`In addition, the method disclosed in NPL 5 does
`
`not consider the loss of DMRS.
`
`[0031]
`
`Further, NPLs 6 and 7, for example, disclose methods of performing URLLC
`
`transmission while avoiding cancelation of DMRS(in other words, loss of DMRS) in eMBB
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`25
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`transmission. The methods disclosed in NPLs 6 and 7, however, restrict the scheduling of
`
`URLLCtransmission.
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`

`2F18384-PCT
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`[0032]
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`Furthermore, NPL 7 discloses a method of canceling eMBB transmission in
`
`URLLC-transmission-interrupted and subsequent symbols when DMRSis nottransmitted.
`
`The method disclosed in NPL 7, however, may deteriorate the frequency utilization
`
`efficiency of e€MBB when eMBB transmission in URLLC-transmission-interrupted and
`
`subsequent symbols is always canceled.
`
`[0033] Accordingly, in one aspect of the present disclosure, a description will be given of
`
`a method for suppressing the deterioration of eMBB transmission quality or frequency
`
`utilization efficiency while ensuring the requirements of URLLC even when eMBB
`
`transmission and URLLCtransmission simultaneously occur in uplink.
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`10
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`[0034]
`
`(Embodiment 1)
`
`[Overview of Communication System]
`
`The communication system according to the present embodimentincludes basestation
`
`100 and terminal 200.
`
`[0035]
`
`FIG. 6 is a block diagram illustrating a configuration of a part of terminal 200
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`15
`
`according to each embodimentof the present disclosure.
`
`In terminal 200 illustrated in FIG.
`
`6, controller 209 determines the transmission operation of the first
`
`transmission,
`
`correspondingto the first service (e.g., URLLC), and the second transmission, corresponding
`
`to the second service (e.g., eMBB), based on the first transmission and the setting of the
`
`reference signal (e.g., DMRS) included in the second transmission.
`
`Transmitter 216
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`20
`
`transmits an uplink signal including at least a signal of the first transmission based on the
`
`determined transmission operation.
`
`[0036]
`
`[Configuration of Base Station]
`
`FIG.7 is a block diagram illustrating a configuration of base station 100 according to
`
`Embodiment 1.
`
`In FIG. 7, base station 100 includes controller 101, higher-layer control
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`25
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`signal generator102, encoder 103, modulator 104, downlink control signal generator 105,
`
`encoder 106, modulator 107, signal assigner 108,
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`Inverse Fast Fourier Transformer
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`10
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`

`

`2F18384-PCT
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`(hereinafter, referred to as “IFFT”) 109, transmitter 110, antenna 111, receiver 112, Fast
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`Fourier Transformer(hereinafter, referred to as “FFT”) 113, extractor 114, channel estimator
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`115, demodulator 116, decoder 117, and determiner 118.
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`[0037] Controller 101 determines the control information on uplink data transmission of
`
`terminal 200, and outputs the determined control information to higher-layer control signal
`
`generator 102, downlink control signal generator 105 and extractor 114.
`
`[0038] The information on uplink data transmission includes, for example, information on
`
`the DMRSsetting, information for indicating that a transmission corresponding to URLLC
`
`occurs in another terminal, information indicating the schemes of coding and modulation
`
`10
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`(e.g., Modulation and Coding Scheme (MCS)), information indicating the radio resource
`
`allocation, and thelike.
`
`[0039] Further, the information to be outputted to higher-layer control signal generator 102
`
`out of the information on uplink data transmission includes, for example, the information on
`
`DMRSsetting. The information to be outputted to downlink control signal generator 105
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`15
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`out of the information on uplink data transmission, in contrast, includes, for example, the
`
`information for indicating that a transmission corresponding to URLLC occurs in another
`
`terminal, information on an uplink transmission whose transmission is indicated by a UL
`
`grant(e.g., the information indicating schemes of coding and modulation, or the information
`
`indicating radio resource allocation), and the like. Noted that the present disclosure is not
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`20
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`limited to the above-mentioned examples, and the information on uplink data transmission
`
`may be included in either an uplink control signal or a downlink control signal.
`
`[0040]
`
`In addition, controller 101 determines the radio resource allocation for downlink
`
`signals to transmit the uplink control signals or the downlink control signals, and outputs the
`
`downlink resource allocation information indicating the resource allocation of downlink
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`25
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`signals to signal assigner 108.
`
`The downlink resource allocation information may be
`
`outputted to higher-layer control signal generator 102 or downlink control signal generator
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`11
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`2F18384-PCT
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`105.
`
`[0041] Higher-layer control signal generator 102 generates a control information bit string
`
`using the control information to be inputted from controller 101, and outputs the generated
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`control information bit string to encoder 103.
`
`[0042] Encoder 103 applies error correction coding to the control information bit string to
`
`be inputted from higher-layer control signal generator 102 and outputs the operation signal
`
`after the coding to modulator 104.
`
`[0043] Modulator 104 modulates the control signal (the control information bit string) to
`
`be inputted from encoder 103, and outputs the control signal after the modulation (a
`
`10
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`modulation signal sequence) to signal assigner 108.
`
`[0044] Downlink control signal generator 105 generates a control information bit string
`
`using the control information to be inputted from controller 101, and outputs the generated
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`control information bit string to encoder 106.
`
`[0045] Note that the control information is transmitted to a plurality of terminals 200 in
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`15
`
`some cases.
`
`In these cases, downlink control signal generator 105 may generate the bit
`
`string including the terminal ID of each terminal 200 (the information to identify each
`
`terminal) in the control information for each terminal 200 (e.g., information indicating the
`
`schemes of coding and modulation for the uplink transmission whose transmission is
`
`indicated by a UL grant or the radio resource allocation information).
`
`Further,
`
`the
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`20
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`information for indicating that a transmission corresponding to URLLC occurs in another
`
`terminal may be transmitted so that a plurality of terminals 200 in the cell can receive.
`
`In
`
`that case, downlink control signal generator 105 may generate the bit string including an ID
`
`as a group unit, which is different from the individual ID of each terminal 200, in a signal
`
`including the information for indicating that a transmission corresponding to URLLCoccurs
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`25
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`in another terminal.
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`[0046] Encoder 106 applies error correction coding to the control information bit string to
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`2F18384-PCT
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`be inputted from downlink control signal generator 105 and outputs the operation signalafter
`
`the coding to modulator 107.
`
`[0047] Modulator 107 modulates the control signal (the control information bit string) to
`
`be inputted from encoder 106, and outputs the control signal after the modulation (a
`
`modulation signal sequence) to signal assigner 108.
`
`[0048]
`
`Signal assigner 108 maps the control signal to be inputted from modulator 104 or
`
`modulator 107 to the radio resource based on the downlink resource allocation information
`
`to be inputted from controller 101.
`
`Signal assigner 108 outputs the downlink signal with
`
`the signal has been mappedthereto to IFFT 109.
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`10
`
`[0049]
`
`IFFT 109 applies transmission waveform generation processing such as Orthogonal
`
`Frequency Division Multiplexing (OFDM)to the signal to be inputted from signal assigner
`
`108.
`
`IFFT 109 applies Cyclic Prefix (CP) in an OFDM transmission applying CP (not
`
`illustrated).
`
`IFFT 109 outputs the generated transmission waveform to transmitter 110.
`
`[0050]
`
`Transmitter 110 applies RF processing such as Digital-to-Analog (D/A)
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`15
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`conversion and up-conversion to the signal to be inputted from IFFT 109, and transmits the
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`radio signal to terminal 200 via antenna 111.
`
`[0051] Receiver 112 applies RF processing such as down-conversion or Analog-to-Digital
`
`(A/D) conversion to an uplink signal waveform received from terminal 200 via antenna111,
`
`and outputs the uplink signal waveform after the reception processing to FFT 113.
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`20
`
`[0052]
`
`FFT 113 applies FFT processing for converting a time-domain signal
`
`into a
`
`frequency-domain signal to the uplink signal waveform to be inputted from receiver 112.
`
`FFT 113 outputs the resultant frequency-domain signal from the FFT processing to extractor
`
`114.
`
`[0053] Based on information received from controller 101, extractor 114 extracts each
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`25
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`radio resource section including, for example, a signal corresponding to eMBBora signal
`
`corresponding to URLLC from the signal to be inputted from FFT 113, and outputs the
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`2F18384-PCT
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`extracted radio resource components to demodulator 116. Further, extractor 114 extracts
`
`DMRSfrom each of the signal corresponding to eMBBand the signal corresponding to
`
`URLLCbased on information received from controller 101 (e.g.,
`
`information related to
`
`DMRSsetting), and outputs the extracted DMRSto channel estimator 115.
`
`[0054] Channel estimator 115 performs channel estimation, using DMRSto be inputted
`
`from extractor 114 and outputs the channel estimate to data demodulator 116.
`
`[0055] Demodulator 116 demodulates the signal (e.g., the signal corresponding to eMBB
`
`or the signal corresponding to URLLC)to be inputted from extractor 114, using the channel
`
`estimate to be inputted from channel estimator 115, and outputs the demodulation result to
`
`10
`
`decoder 117.
`
`[0056] Decoder 117 performs error correction decoding using the demodulation result to
`
`be inputted from demodulator 116, and outputs the bit sequence after decoding to determiner
`
`118.
`
`[0057] Determiner 118 applies error detection processing to the bit sequence to be inputted
`
`15
`
`from decoder 117. Determiner 118 outputs the bit sequence (received data) when noerror
`
`is detected from the bit sequence. When an error is detected from the bit sequence, however,
`
`base station 100 may generate a response signal
`
`(ACK/NACK signal) and make a
`
`retransmission request to terminal 200 (notillustrated).
`
`[0058]
`
`[Configuration of Terminal]
`
`20
`
`FIG.8 is a block diagram illustrating the configuration of terminal 200 according to
`
`Embodiment 1.
`
`In FIG. 8, terminal 200 includes antenna 201, receiver 202, FFT203,
`
`extractor 204, downlink control signal demodulator 205, decoder 206, higher-layer control
`
`signal demodulator 207, decoder 208, controller 209, encoders 210 and 212, modulators
`
`21 land 213, signal assigner 214, IFFT 215, and transmitter 216.
`
`25
`
`[0059] Receiver 202 applies RF processing such as down-conversion or Analog-to-Digital
`
`(A/D) conversion to a signal waveform of a downlink signal (e.g., a control signal) received
`
`14
`
`

`

`2F18384-PCT
`
`from base station 100 via antenna 201, and outputs the resultant reception signal (i.e., a
`
`basebandsignal) to FFT 203.
`
`[0060]
`
`FFT 203 applies FFT processing for converting a time-domain signal
`
`into a
`
`frequency-domainsignal to the signal (i.e., time-domain signal) to be inputted from receiver
`
`202. FFT 203 outputs the resultant frequency-domain signal from the FFT processing to
`
`extractor 204.
`
`[0061] Extractor 204 extracts a reception signal including the downlink control signal from
`
`the signal to be inputted from FFT 203 based on the control information to be inputted from
`
`controller 209 (e.g., radio resource allocation information), and outputs to downlink control
`
`10
`
`signal demodulator 205. Extractor 204 also extracts a reception signal including the uplink
`
`control signal based on the control information to be inputted from controller 209 (e.g., radio
`
`resource assignment information), and outputs the reception signal to higher-layer control
`
`signal demodulator 207.
`
`[0062] Downlink control signal demodulator 205 applies blind decoding to the reception
`
`15
`
`signal to be inputted from extractor 204. Whenthe reception signal is determined to be a
`
`control
`
`signal addressed to terminal 200, downlink control
`
`signal demodulator 205
`
`demodulates the control signal, and outputs the demodulation result to decoder 206.
`
`[0063] Decoder 206 applies error correction decoding to the demodulation result to be
`
`inputted from downlink control signal demodulator 205, and obtains control information
`
`20
`
`(e.g., a downlink control signal).
`
`Decoder 206 then outputs the resultant control
`
`information to controller 209.
`
`[0064] Higher-layer control signal demodulator 207 demodulates the reception signal to
`
`be inputted from extractor 204, and outputs the demodulation result to decoder 208.
`
`[0065] Decoder 208 applies error correction decoding to the demodulation result to be
`
`25
`
`inputted from higher-layer control signal demodulator 207, and obtains control information
`
`(e.g., an uplink control signal). Decoder 208 then outputs the resultant control information
`
`15
`
`

`

`2F18384-PCT
`
`to controller 209.
`
`[0066] Controller 209, for example, acquires control information indicating the radio
`
`resource allocation for the downlink signal to transmit the uplink control signal or the
`
`downlink control signal, and outputs the control information to extractor 204.
`
`[0067]
`
`In addition, controller 209 acquires information on the uplink data transmission of
`
`terminal 200 that is respectively obtained from the downlink control signal to be inputted
`
`from decoder 206 or the uplink control signal to be inputted from decoder 208. Controller
`
`209 calculates, for example, the schemes of coding and modulation or the radio resource
`
`allocation of the uplink data transmission by using the information on the uplink data
`
`10
`
`transmission, and outputs the calculated information to encoder 210, encoder 212, modulator
`
`211, modulator 213, and signal assigner 214.
`
`[0068] Further, controller 209 outputs the information on the DMRSsetting obtained from
`
`the uplink control signal or the downlink control signal to signal assigner 214.
`
`[0069] Furthermore, controller 209 determines, in a method described later, the eMBB
`
`15
`
`transmission operation in URLLC-transmission-interrupted and subsequent symbols, the
`
`multiple position of URLLC transmission, or the like in the case ofe€MBB transmission and
`
`URLLCtransmission simultaneously occurring, and outputs the determined information to
`
`transmitter 216.
`
`[0070] Encoder 210 applies error correction coding to a transmission bit sequence (1.e.,
`
`20
`
`transmission data) corresponding to eMBB, and outputs the bit sequence after the coding to
`
`modulator 211.
`
`[0071] Modulator 211 generates a modulation symbol sequence by modulating the bit
`
`sequence to be inputted from encoder 210, and outputs to signal assigner 214.
`
`[0072] Encoder 212 applies error correction coding to a transmission bit sequence (1.e.,
`
`25
`
`transmission data) corresponding to URLLC, and outputs the bit sequence after the coding
`
`to modulator 213.
`
`16
`
`

`

`2F18384-PCT
`
`[0073] Modulator 213 generates a modulation symbol sequence by modulating the bit
`
`sequenceto be inputted from encoder 212, and outputs to signal assigner 214.
`
`[0074]
`
`Signal assigner 214 maps thesignal to be inputted from modulator 211 or modulator
`
`213 to the radio resource to be indicated by controller 209. Additionally, signal assigner
`
`214 maps DMRSto the radio resource based on the information on the DMRSsetting to be
`
`inputted from controller 209.
`
`Signal assigner 214 outputs the uplink signal with the signals
`
`have been mapped thereto to IFFT 215.
`
`[0075]
`
`IFFT 215 applies transmission waveform generation processing such as OFDM to
`
`the signal to be inputted from signal assigner 214.
`
`IFFT 215 outputs the generated
`
`10
`
`transmission waveform to transmitter 216.
`
`IFFT 215 applies Cyclic Prefix (CP) in an
`
`OFDM transmission applying CP (notillustrated). Alternatively, the modulation symbol
`
`sequence to be outputted from modulator 211 and modulator 213 may be converted into a
`
`symbol sequence in a frequency domain by applying Discrete Fourier Transform (DFT)
`
`when IFFT 215 generates a single-carnier waveform (e.g., a DFT-s-OFDM waveform) (not
`
`15
`
`illustrated).
`
`[0076] Transmitter 216 performs transmission control (e.g., transmission multiplexing,
`
`eMBBtransmission cancelation, transmission powercontrol, etc.) on eMBB transmission
`
`and URLLCtransmission, towards the signal to be inputted from IFFT 215 based on the
`
`information to be inputted from controller 209.
`
`In addition, transmitter 216 applies Radio
`
`20
`
`Frequency (RF) processing such as Digital-to-Analog (D/A) conversion and up-conversion
`
`to the signal, and transmits the radio signal to base station 100 via antenna 201.
`
`[0077]
`
`[Operations of Base Station 100 and Terminal 200]
`
`Next, operations of base station 100 and terminal 200 that include above-mentioned
`
`configurations will be described in detail.
`
`25
`
`[0078]
`
`FIG. 9 illustrates the flow of processes in base station 100 and terminal 200
`
`according to the present embodiment.
`
`17
`
`

`

`2F18384-PCT
`
`[0079]
`
`Basestation 100 transmits information on a DMRSsetting to terminal 200 (ST101).
`
`Terminal 200 acquires the information on the DMRSsetting indicated from base station 100
`
`(ST102).
`
`[0080] NR supports, for example, the setting of Additional DMRS(s) as the DMRSsetting
`
`(see, for example, NPL 1). For example, as illustrated in FIG. 10, when the number of
`
`transmission symbols is 14 and the mapping method is "PUSCH mapping type B" where the
`
`first one symbol is DMRS, the setting using 1, 2 or 3 symbols of Additional DMRS is
`
`supported. The information