WO2020084788A1 - Dispositif utilisateur - Google Patents

Dispositif utilisateur Download PDF

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Publication number
WO2020084788A1
WO2020084788A1 PCT/JP2018/039998 JP2018039998W WO2020084788A1 WO 2020084788 A1 WO2020084788 A1 WO 2020084788A1 JP 2018039998 W JP2018039998 W JP 2018039998W WO 2020084788 A1 WO2020084788 A1 WO 2020084788A1
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WIPO (PCT)
Prior art keywords
transmission power
value
user
power control
transmission
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PCT/JP2018/039998
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English (en)
Japanese (ja)
Inventor
良介 大澤
佑一 柿島
一樹 武田
Original Assignee
株式会社Ｎｔｔドコモ
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2018/039998 priority Critical patent/WO2020084788A1/fr
Publication of WO2020084788A1 publication Critical patent/WO2020084788A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to a user device in a wireless communication system.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Advanced
  • NR New Radio
  • 5G New Radio
  • user devices directly communicate with each other without going through a base station device.
  • a D2D (Device to Device) technology to be carried out has been studied (for example, Non-Patent Document 1).
  • D2D reduces the traffic between the user equipment and the base station equipment, and enables communication between the user equipment even if the base station equipment becomes unable to communicate due to a disaster or the like.
  • D2D is referred to as "sidelink", but in this specification, a more general term D2D is used. However, side links are also used as necessary in the description of the embodiments described later.
  • D2D communication includes D2D discovery (D2D discovery, also referred to as D2D discovery) for discovering other communicable user devices and D2D communication (D2D direct communication, D2D communication, terminal) for directly communicating between user devices. Also called direct communication between.), And roughly divided.
  • D2D communication, D2D discovery, and the like will be simply referred to as D2D unless otherwise distinguished.
  • a signal transmitted / received in D2D is called a D2D signal.
  • Various use cases of services related to V2X (Vehicle to Everything) in NR have been studied (for example, Non-Patent Document 2).
  • groupcast or broadcast is being considered in addition to unicast.
  • the user apparatus executes group cast or broadcast, it is difficult to perform appropriate transmission power control because a plurality of user apparatuses are transmission targets.
  • the present invention has been made in view of the above points, and an object thereof is to allow a user apparatus to perform appropriate transmission power control in direct communication between terminals.
  • a transmission unit that performs transmission by direct communication between terminals to a plurality of other user devices, and a transmission power control command corresponding to transmission by direct communication between terminals from the plurality of other user devices.
  • a receiving unit that receives the signal, and a control unit that determines a transmission power to be applied to the inter-terminal direct communication based on the transmission power control command, wherein the transmission unit applies the determined transmission power and
  • a user device is provided that transmits to a plurality of other user devices.
  • the user apparatus can perform appropriate transmission power control in direct communication between terminals.
  • LTE Long Term Evolution
  • NR NR
  • LAN Local Area Network
  • the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other (for example, Flexible Duplex). May be used.
  • “configuring” the wireless parameter and the like may mean that a predetermined value is preset (Pre-configure), or the base station device 10 Alternatively, the wireless parameter notified from the user device 20 may be set.
  • FIG. 1 is a diagram for explaining V2X.
  • V2X Vehicle to Everything
  • eV2X enhanced V2X
  • FIG. 1 V2X is a part of ITS (Intelligent Transport Systems) and means V2V (Vehicle to Vehicle), which means a form of communication between vehicles, and a roadside installed alongside a vehicle and a road.
  • V2I Vehicle to Infrastructure
  • V2N Vehicle to Network
  • V2P Vehicle to Pedestrian
  • V2X using LTE or NR cellular communication and direct communication between terminals is being studied in 3GPP.
  • V2X using cellular communication is also referred to as cellular V2X.
  • studies are underway to realize large capacity, low delay, high reliability, and QoS (Quality of Service) control.
  • the communication device is mounted on a vehicle, but the embodiment of the present invention is not limited to the form.
  • the communication device may be a terminal held by a person, the communication device may be a device mounted on a drone or an aircraft, and the communication device may be a base station, an RSU, a relay station (relay node), It may be a user device or the like having a scheduling capability.
  • SL may be distinguished based on any one or combination of UL (Uplink) or DL (Downlink) and 1) -4) below. Further, SL may have another name. 1) Time domain resource allocation 2) Frequency domain resource allocation 3) Reference synchronization signal (including SLSS (Sidelink Synchronization Signal)) 4) Reference signal used for path loss measurement for transmission power control
  • OFDM Orthogonal Frequency Division Multiplexing
  • CP-OFDM Cyclic-Prefix OFDM
  • DFT-S-OFDM Discrete Fourier Transform-Spread-OFDM
  • OFDM Orthogonal Frequency Division Multiplexing
  • Any of the existing OFDM may be applied.
  • Mode 3 and Mode 4 are defined with respect to SL resource allocation to the user device 20.
  • transmission resources are dynamically allocated by DCI (Downlink Control Information) transmitted from the base station device 10 to the user device 20.
  • DCI Downlink Control Information
  • SPS Semi Persistent Scheduling
  • the user device 20 autonomously selects a transmission resource from the resource pool.
  • the slot in the embodiment of the present invention may be read as a symbol, a minislot, a subframe, a radio frame, or a TTI (Transmission Time Interval).
  • the cell in the embodiment of the present invention may be replaced with a cell group, a carrier component, a BWP, a resource pool, a resource, a RAT (Radio Access Technology), a system (including a wireless LAN), or the like.
  • FIG. 2 is a diagram for explaining an example of a wireless communication system according to the embodiment of the present invention.
  • ⁇ V2X in NR is considering closed-loop transmission power control for unicast or groupcast. Further, in LTE or NR, correction of transmission power by a TPC (Transmission Power Control) command is specified.
  • TPC Transmission Power Control
  • Mathematical formula 1 is an example of an equation for calculating the transmission power [dBm] of PUSCH (Physical Uplink Shared Channel).
  • PCMAX, f, c (i) shown in Expression 1 is the maximum transmission power set by the user apparatus 20.
  • f is a carrier
  • c is a serving cell
  • i is a PUSCH transmission opportunity.
  • P O_PUSCH, b, f, c (j) shown in Expression 1 is a parameter used for transmission power control determined based on the setting from the upper layer.
  • j is a parameter set from the upper layer, and may correspond to the beam index, for example.
  • b shows BWP (Bandwidth part).
  • M PUSCH RB, b, f, c (i) indicates the bandwidth of the assigned PUSCH resource and is expressed by the number of resource blocks.
  • ⁇ corresponds to the setting of the subcarrier spacing.
  • ⁇ b, f, c (j) is a parameter set by the upper layer used for transmission power control.
  • PL b, f, c (q d ) corresponds to the DL path loss.
  • q d represents the index of the reference signal used to calculate the path loss.
  • ⁇ TF, b, f, c (i) is a correction value according to the modulation method and the like.
  • f b, f, c (i, l) is a PUSCH power control adjustment state and has an index l.
  • b is UL BWP
  • f is a carrier
  • c is a serving cell.
  • index 1 corresponds to two states, 0 or 1
  • closed loop power control is individually defined for each state.
  • the valid / invalid of l may be designated by upper layer signaling, or may be designated by a closed loop indicator by PHY layer signaling.
  • the power value controlled by f b, f, c (i, l) is calculated by accumulating the values of TPC commands.
  • Mathematical formula 2 is an example of an equation for calculating the transmission power [dBm] of the PUCCH (Physical Uplink Control Channel).
  • PCMAX, f, c (i) shown in Equation 2 is the maximum transmission power set by the user apparatus 20.
  • f is a carrier
  • c is a serving cell
  • i is a PUCCH transmission opportunity.
  • P O_PUCCH, b, f, c (q u ) shown in Expression 2 is a parameter used for transmission power control determined based on the setting from the upper layer.
  • q u is determined by a parameter set from the upper layer, and b indicates BWP.
  • M PUCCH RB, b, f, c (i) indicates the bandwidth of the allocated PUCCH resource and is represented by the number of resource blocks.
  • ⁇ corresponds to the setting of the subcarrier spacing.
  • PL b, f, c (q d ) corresponds to the DL path loss.
  • q d represents the index of the reference signal used to calculate the path loss.
  • ⁇ F_PUCCH (F) is a correction value according to the PUCCH format.
  • ⁇ TF, b, f, c (i) is a correction value according to the number of symbols and the like.
  • g b, f, c (i, l) is a PUCCH power control adjustment state and has an index l.
  • b indicates UL BWP
  • f indicates carrier
  • c indicates primary cell.
  • index 1 corresponds to two states, 0 or 1
  • closed loop power control is individually defined for each state.
  • the valid / invalid of l may be designated by upper layer signaling, or may be designated by a closed loop indicator by PHY layer signaling.
  • the power value controlled by g b, f, c (i, l) is calculated by accumulating the values of TPC commands.
  • Mathematical formula 3 is an example of an expression for calculating the transmission power [dBm] of SRS (Sounding Reference Signal).
  • PCMAX, f, c (i) shown in Expression 3 is the maximum transmission power set by the user apparatus 20.
  • f is a carrier
  • c is a serving cell
  • i is an SRS transmission opportunity.
  • b, f, c ( q s) is a parameter used for transmit power control which is set from the upper layer.
  • q s indicates the SRS resource set
  • b indicates the BWP.
  • M SRS RB, b, f, c (i) indicates the bandwidth of SRS and is expressed by the number of resource blocks.
  • ⁇ corresponds to the setting of the subcarrier spacing.
  • PL b, f, c (q d ) corresponds to the DL path loss.
  • q d represents the index of the reference signal used to calculate the path loss.
  • h b, f, c (i, l) is the SRS power control adjustment state and has index l.
  • b is UL BWP
  • f is a carrier
  • c is a serving cell.
  • index 1 corresponds to two states, 0 or 1
  • closed loop power control is individually defined for each state.
  • the valid / invalid of l may be designated by upper layer signaling, or may be designated by a closed loop indicator by PHY layer signaling.
  • the power value controlled by h b, f, c (i, l) is calculated by accumulating the values of TPC commands. Note that, by upper layer signaling, h b, f, c (i, l) is set to the same transmission power control adjustment state as the PUSCH transmission power control adjustment state f b, f, c (i, l). Good.
  • the user device 20A performs group casting, it is assumed that the user device 20A receives TPC commands from a plurality of user devices 20 as shown in FIG. In the prior art, closed-loop transmission power control of groupcast based on a plurality of TPC commands has not been specified.
  • FIG. 3 is a sequence diagram for explaining an example of power control in the embodiment of the present invention.
  • FIG. 3 shows an example in which there are three receiving side user apparatuses 20 for group casting, the number of receiving side user apparatuses 20 may be more or less than three.
  • the group cast may be broadcast.
  • step S1a, step S1b, and step S1c the user device 20A transmits a side link signal that is a group cast to the user device 20B, the user device 20C, and the user device 20D. Then, the user apparatus 20B, the user apparatus 20C, and the user apparatus 20D each transmit a TPC command to the user apparatus 20A based on the reception state of the side link signal (S2a, S2b, S2c). Then, in step S3, the user apparatus 20A determines the side link transmission power based on the received TPC command.
  • steps S2a, S2b, and S2c not all of the user devices 20B, 20C, and 20D need to send the TPC command to the user device 20A, and some of the user devices 20 cannot send the TPC command. It may be omitted.
  • FIG. 4 is a flowchart for explaining an example (1) of power control in the embodiment of the present invention. Referring to FIG. 4, a detailed example of step S3 shown in FIG. 3 will be described.
  • step S31 the user device 20A calculates the transmission power control adjustment value f (i) corresponding to each user device 20, based on the TPC commands received from the plurality of receiving-side user devices 20.
  • f (i) indicates the transmission power control adjustment state of the side-link transmission opportunity i similarly to the PUSCH transmission power control adjustment state f b, f, c (i, l).
  • step S32 the user apparatus 20A determines the sidelink transmission power of groupcast based on the calculated plurality of f (i).
  • the user apparatus 20A may use the number 1 in the same manner as the PUSCH when calculating the transmission power of the side link.
  • the respective f (i) held by the user apparatus 20A for the receiving side user apparatus 20 are f (i, 1) for the user apparatus 20B, f (i, 2) for the user apparatus 20C, and f (i) for the user apparatus 20D. , 3), it may be specified by the specification that the user apparatus 20A calculates f (i) used for determining the sidelink transmission power of groupcast as in 1) -6) below. It may be set by the base station device 10.
  • f (i) to be referred to may be all of f (i, 1), f (i, 2), and f (i, 3).
  • f (i) to be referred to is a predetermined number of f (i, 1), f (i, 2), and f (i, 3) in descending order from the maximum value. It may be (i).
  • the predetermined number may be defined by the specifications, or may be set by the base station device 10.
  • the f (i) to be referred to is a predetermined number of f (i, 1), f (i, 2), and f (i, 3) in order from the smallest value. It may be (i).
  • the predetermined number may be defined by the specifications, or may be set by the base station device 10.
  • f (i) to be referred to is one or more f (i) selected at random from f (i, 1), f (i, 2), and f (i, 3). It may be i).
  • the user device 20A may convert f (i) to a true value and average.
  • the user apparatus 20A may average f (i) without converting the true value. For example, when f (i, 1), f (i, 2), and f (i, 3) are 0 dB, 1 dB, and 3 dB, the average value may be 4/3 dB.
  • the maximum value, the minimum value, the average value, the summed value, the median value, and the mode value in the above 1) -6) may be a positive value, a negative value, or 0. May be
  • the receiving user equipment 20 may also be referred to as a link, carrier, channel, etc.
  • the user device 20 may be identified by the DestinationID, the UEID, the sequence of reference signals, or the like, or may be associated with l.
  • a destination ID, a UEID, or a sequence of reference signals for identifying the user device 20 is transmitted from the base station device 10 to DCI (Downlink Control Information), SCI (Sidelink Control Information), MAC (Media Access Control) signaling, or RRC (Radio Resource Control) signaling.
  • DCI Downlink Control Information
  • SCI Segment Control Information
  • MAC Media Access Control
  • RRC Radio Resource Control
  • j shown in Expression 1 may be associated with the user apparatus 20. If at least one of the value of j associated with the user equipment 20, P 0 shown in Equation 1 and ⁇ shown in Equation 1 is changed, reset f (i) of the user equipment 20 with which j is associated. You may. Further, when at least one of the values of j, which is one or more of the values of j respectively associated with the plurality of user devices 20, P 0 shown in Expression 1 and ⁇ shown in Expression 1, is changed. , F (i) of all user devices 20 may be reset. Further, when PRACH (Physical Random Access Channel) transmission occurs in the transmitting side user equipment 20, f (i) of all the receiving side user equipments 20 may be reset.
  • PRACH Physical Random Access Channel
  • FIG. 5 is a flowchart for explaining an example (2) of power control in the embodiment of the present invention.
  • a detailed example of step S3 shown in FIG. 3 will be described with reference to FIG. Steps S31 and S32 shown in FIG. 4 and steps S35 and S36 shown in FIG. 5 may be executed independently or in parallel.
  • step S35 the user device 20A calculates one transmission power control adjustment value f (i) based on the TPC command received from the plurality of receiving-side user devices 20.
  • f (i) indicates the transmission power control adjustment state of the side-link transmission opportunity i similarly to the PUSCH transmission power control adjustment state f b, f, c (i, l).
  • step S36 the user apparatus 20A determines the sidelink transmission power of groupcast based on the calculated one f (i).
  • the user apparatus 20A may use the number 1 in the same manner as the PUSCH when calculating the transmission power of the side link.
  • the user equipment 20A is the groupcast side.
  • the TPC command used to calculate f (i) used to determine the link transmission power may be calculated by the specification as in 1) -6) below, or may be set by the base station device 10. May be.
  • the TPC command to be referenced may be all of TPC (1), TPC (2), and TPC (3).
  • the TCP command to be referred to may be a predetermined number of TCP commands in descending order from the maximum value of TPC (1), TPC (2), and TPC (3).
  • the predetermined number may be defined by the specifications, or may be set by the base station device 10.
  • the TCP command to be referred to may be a predetermined number of TCP commands in ascending order from the smallest value among TPC (1), TPC (2), and TPC (3).
  • the predetermined number may be defined by the specifications, or may be set by the base station device 10.
  • the TCP command to be referred to may be one or a plurality of TCP commands randomly selected from TPC (1), TPC (2), and TPC (3).
  • the TCP command to be referenced may be defined or set in a time window.
  • the TCP command received in the time domain section [i n 1 , i n 2 ] may be used to calculate f (i).
  • n 1 and n 2 may be specified in the specifications, or may be set by the base station.
  • the user device 20A may convert the decibel value specified by the TPC command into a true value and average the decibel value.
  • the user apparatus 20A may determine the side link transmission power using a value whose decibel notated value is the closest to the value that can be specified by the TPC command.
  • the user apparatus 20A may average the decibel value designated by the TPC command without converting the decibel value.
  • TPC (1), TPC (2), and TPC (3) are 0 dB, 1 dB, and 3 dB
  • the average value may be 4/3 dB
  • the value that can be specified by the TPC command is, for example, ⁇ -1 dB.
  • 0 dB, 1 dB, 3 dB ⁇ the average value may be 1 dB as a value closest to 4/3 dB.
  • the maximum value, the minimum value, the average value, the summed value, the median value, and the mode value in the above 1) -6) may be a positive value, a negative value, or 0. May be
  • the receiving user equipment 20 may also be referred to as a link, carrier, channel, etc.
  • the user device 20 may be identified by the DestinationID, the UEID, the reference signal sequence, or the like.
  • a destination ID, a UEID, or a sequence of reference signals for identifying the user apparatus 20 is notified from the base station apparatus 10 by any control signal of DCI, SCI, MAC signaling, or RRC signaling, and the user apparatus 20 designated by the control signal.
  • the processes 1) to 6) may be performed.
  • step S4a, step S4b, and step S4c the user apparatus 20A transmits a sidelink signal to be a group cast to the user apparatus 20B, the user apparatus 20C, and the user apparatus 20D, based on the sidelink transmission power determined in step S3. .
  • the increase or decrease of the side link transmission power may be determined based on feedback information other than the TPC command.
  • the following methods 1) and 2) may be used.
  • a HARQ (Hybrid automatic repeat request) response may be used to determine whether to increase or decrease the sidelink transmission power.
  • the user apparatus 20 may increase the transmission power when receiving the NACK.
  • the increase value may be specified in the specification or may be set in the base station device 10.
  • the user apparatus 20 may reduce the transmission power when receiving the ACK continuously N times. N may be specified in the specification or may be set in the base station device 10.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • RSSI Receiveived Signal Strength Indicator
  • SINR Signal to Interference plus Noise Ratio
  • the user apparatus 20 may increase or decrease the transmission power based on the absolute value or the relative value of RSRP, RSRQ, RSSI or SINR acquired as an SL-CSI (Sidelink Channel State Information) report from the receiving side user apparatus 20. For example, when the reported RSRP or the like exceeds the value specified in the specifications in advance or set in the base station apparatus 10, the user apparatus 20 may reduce the transmission power.
  • the user device 20 may increase the transmission power.
  • the user device 20 reduces the transmission power. Good.
  • the relative value from the previously reported value such as the reported RSRP is defined in the specifications in advance or is lower than the value set in the base station device 10
  • the user device 20 increases the transmission power. Good.
  • a path loss value may be used instead of RSRP, RSRQ, RSSI or SINR in 2) above.
  • the user apparatus 20 may increase the transmission power.
  • the user apparatus 20 may reduce the transmission power.
  • the transmission-side user apparatus 20 may notify the reception-side user apparatus 20 of the side link transmission power or the parameter related to the transmission power determination.
  • the notified parameter may be j, q d , l shown in Expression 1 or a combination thereof.
  • the parameter to be notified may be the values of P 0 , ⁇ , PL, and f (i) shown in Formula 1 themselves.
  • the parameter may be notified from the transmitting side user apparatus 20 to the receiving side user apparatus 20 by a control signal of either SCI, MAC signaling or RRC signaling.
  • the embodiment of the present invention is mainly applied to the side link, but may be applied to the downlink or the uplink.
  • the base station device 10 may be replaced with a user device 20 having a scheduling function, a relay station, or the like.
  • Groupcast may also be called multicast.
  • the embodiment of the present invention is premised on being mainly applied to group cast, but may be applied to unicast or broadcast. For example, when a certain transmitting user apparatus 20 is performing unicast communication with each of a plurality of receiving user apparatuses 20, the side link transmission power is determined for each receiving user apparatus 20 according to the embodiment of the present invention. You may.
  • the user equipment 20 executes closed loop transmission power control based on TPC commands fed back from a plurality of receiving user equipments 20 even when the side link communication is group cast or broadcast. As a result, appropriate side link transmission power control can be executed.
  • the user device in direct communication between terminals, the user device can perform appropriate transmission power control.
  • the base station device 10 and the user device 20 include a function for implementing the above-described embodiment. However, each of the base station device 10 and the user device 20 may have only some of the functions in the embodiment.
  • FIG. 6 is a diagram illustrating an example of a functional configuration of the base station device 10.
  • the base station device 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in FIG. 6 is merely an example.
  • the names of the functional divisions and functional units may be any names as long as the operations according to the embodiments of the present invention can be performed.
  • the transmitting unit 110 includes a function of generating a signal to be transmitted to the user device 20 side and wirelessly transmitting the signal.
  • the receiving unit 120 includes a function of receiving various signals transmitted from the user device 20 and acquiring, for example, information of a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, DL reference signal, etc. to the user apparatus 20.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the user device 20 in the storage device, and reads it from the storage device as necessary.
  • the content of the setting information is, for example, information related to the transmission power setting of D2D communication.
  • the control unit 140 performs a process related to the setting for the user device 20 to perform D2D communication, as described in the embodiment. In addition, the control unit 140 transmits the parameter related to the transmission power control of the D2D communication to the user device 20 via the transmission unit 110.
  • the functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the reception unit 120.
  • FIG. 7 is a diagram illustrating an example of a functional configuration of the user device 20.
  • the user device 20 includes a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in FIG. 7 is merely an example.
  • the names of the functional divisions and functional units may be any names as long as the operations according to the embodiments of the present invention can be performed.
  • the transmitting unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and acquires signals of higher layers from the received physical layer signals.
  • the receiving unit 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, reference signals, or the like transmitted from the base station apparatus 10.
  • the transmission unit 210 performs P2CH communication to other user apparatuses 20 by using PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), and PSBCH (Physical Sidelink Broadcast Channel). ) Etc., and the receiving part 220 receives PSCCH, PSSCH, PSDCH, PSBCH, etc. from the other user apparatus 20.
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Side
  • the setting unit 230 stores various setting information received from the base station device 10 or the user device 20 by the receiving unit 220 in a storage device, and reads from the storage device as necessary.
  • the setting unit 230 also stores preset setting information.
  • the content of the setting information is, for example, information related to the transmission power setting of D2D communication.
  • the control unit 240 controls D2D communication with another user device 20, as described in the embodiment.
  • the control unit 240 also performs processing relating to transmission power control of D2D communication.
  • the control unit 240 may also schedule D2D communication.
  • the functional unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the reception unit 220.
  • each functional block may be realized by using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.) and may be implemented using these multiple devices.
  • the functional blocks may be realized by combining the one device or the plurality of devices with software.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and observation. Broadcasting, notifying, communicating, forwarding, configuration, reconfiguring, allocating, mapping, assigning, etc., but not limited to these. I can't.
  • functional blocks (components) that function transmission are called a transmitting unit and a transmitter.
  • the implementation method is not particularly limited.
  • the base station device 10, the user device 20, and the like according to the embodiment of the present disclosure may function as a computer that performs the process of the wireless communication method of the present disclosure.
  • FIG. 8 is a diagram illustrating an example of a hardware configuration of the base station device 10 and the user device 20 according to the embodiment of the present disclosure.
  • the base station device 10 and the user device 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be done.
  • the word “apparatus” can be read as a circuit, device, unit, or the like.
  • the hardware configurations of the base station device 10 and the user device 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
  • Each function in the base station device 10 and the user device 20 causes a predetermined software (program) to be loaded onto hardware such as the processor 1001, the storage device 1002, etc., so that the processor 1001 performs calculation and communication by the communication device 1004. It is realized by controlling or controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • the processor 1001 operates an operating system to control the entire computer, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, a register, and the like.
  • CPU central processing unit
  • the control unit 140 and the control unit 240 described above may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to these.
  • a program that causes a computer to execute at least part of the operations described in the above-described embodiments is used.
  • the control unit 140 of the base station device 10 illustrated in FIG. 6 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • the control unit 240 of the user device 20 illustrated in FIG. 7 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via an electric communication line.
  • the storage device 1002 is a computer-readable recording medium, and is, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured.
  • the storage device 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the storage device 1002 can store an executable program (program code), a software module, or the like for implementing the communication method according to the embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and is, 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 disk). -Ray disk), smart card, flash memory (eg card, stick, key drive), floppy disk, magnetic strip, etc.
  • the auxiliary storage device 1003 may be referred to as an auxiliary storage device.
  • the above-described storage medium may be, for example, a database including at least one of the storage device 1002 and the auxiliary storage device 1003, a server, or another appropriate medium.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD). May be composed of
  • FDD Frequency Division Duplex
  • TDD time division duplex
  • the transmitter / receiver may be implemented by physically or logically separating the transmitter and the receiver.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
  • 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 storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station device 10 and the user device 20 include a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and the like. It may be configured to include hardware, and the hardware may implement part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the transmission unit that performs direct communication between terminals to a plurality of other user devices, and the direct communication between terminals from the plurality of other user devices.
  • a receiving unit that receives a transmission power control command corresponding to the transmission by, and a control unit that determines the transmission power to be applied to the inter-terminal direct communication based on the transmission power control command.
  • a user equipment is provided that applies the determined transmission power and transmits to the plurality of other user equipments.
  • the user apparatus 20 can perform closed-loop transmission power control based on TPC commands fed back from a plurality of receiving-side user apparatuses 20, even when the side link communication is multicast or broadcast. , It is possible to perform appropriate side link transmission power control. That is, in direct communication between terminals, the user apparatus can perform appropriate transmission power control.
  • the control unit calculates, based on the transmission power control command, a transmission power control adjustment value corresponding to the plurality of other user devices for each other user device, and the transmission calculated for each of the other user devices.
  • the transmission power applied to the direct communication between terminals may be determined based on the maximum value, the minimum value, the average value, the summed value, the median value, or the mode value of the power control adjustment values.
  • the user equipment 20 can determine the sidelink transmission power based on the feedback of the plurality of user equipments 20.
  • the control unit sets the transmission power control adjustment value corresponding to the plurality of other user apparatuses. You can reset everything. With this configuration, the user device 20 can reset the transmission power control adjustment value of the side link when the communication status changes.
  • the control unit calculates a transmission power control adjustment value based on a maximum value, a minimum value, an average value, a summed value, a median value, or a mode value of the transmission power control command, and based on the transmission power control adjustment value. Then, the transmission power applied to the direct communication between terminals may be determined. With this configuration, the user equipment 20 can determine the sidelink transmission power based on the feedback of the plurality of user equipments 20.
  • the control unit uses the transmission power control command in a section of a predetermined time domain for calculating the transmission power control adjustment value and uses the mode of the transmission power control command for calculating the transmission power control adjustment value
  • the value of the transmission power control command received most in the predetermined time domain section may be used.
  • the user equipment 20 can determine the side link transmission power corresponding to the section that refers to the feedback of the plurality of user equipments 20 that is freely set.
  • the receiving unit receives a HARQ (Hybrid automatic repeat request) response or an SL-CSI (Sidelink Channel State Information) report from the plurality of other user apparatuses,
  • the control unit may determine the transmission power applied to the direct communication between terminals based on the HARQ response or the SL-CSI report.
  • the user equipment 20 can determine the side link transmission power based on the HARQ response or the SL-CSI report without overhead.
  • the operation of a plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
  • the order of processing may be changed as long as there is no contradiction.
  • the software operated by the processor included in the base station device 10 according to the embodiment of the present invention and the software operated by the processor included in the user device 20 according to the embodiment of the present invention are respectively a random access memory (RAM), a flash memory, and a read memory. It may be stored in a dedicated memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, 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, and RRC signaling may be called an RRC message, for example, RRC message. It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.
  • Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system). 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 (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other systems using appropriate systems, and extensions based on these. It may be applied to at least one of the next-generation systems. Also, a plurality of systems may be combined and applied (for example, a combination of at least one of LTE and LTE-A and 5G).
  • the specific operation that is performed by the base station device 10 in this specification may be performed by its upper node in some cases.
  • various operations performed for communication with the user device 20 are other than the base station device 10 and the base station device 10.
  • it may be performed by at least one of the network nodes of (eg, but not limited to, MME or S-GW, etc.).
  • the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). Good.
  • Information or signals described in the present disclosure may be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • Information that has been input and output may be stored in a specific location (for example, memory), or may be managed using a management table. Information that is input / output can be overwritten, updated, or added. The output information and the like may be deleted. The input information and the like may be transmitted to another device.
  • the determination according to the present disclosure may be performed based on a value represented by 1 bit (0 or 1), may be performed based on a Boolean value (Boolean: true or false), or may be performed by comparing numerical values (for example, , Comparison with a predetermined value).
  • software, instructions, information, etc. may be sent and received via a transmission medium.
  • the software uses a wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and / or wireless technology (infrared, microwave, etc.) websites, When sent from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.
  • wired technology coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.
  • wireless technology infrared, microwave, etc.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of
  • At least one of the channel and the symbol may be a signal (signaling).
  • the signal may also be a message.
  • a component carrier CC may be called a carrier frequency, a cell, a frequency carrier, or the like.
  • system and “network” used in this disclosure are used interchangeably.
  • the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented.
  • the radio resources may be those indicated by the index.
  • base station (BS: Base Station)”, “radio base station”, “base station device”, “fixed station”, “NodeB”, “eNodeB (eNB)”, “gNodeB”. (GNB) ”,“ access point ”,“ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”,
  • the terms "cell group”, “carrier”, “component carrier” and the like may be used interchangeably.
  • a base station may be referred to by terms such as macro cell, small cell, femto cell, and pico cell.
  • a base station can accommodate one or more (eg, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being defined by a base station subsystem (eg, indoor small base station (RRH: Communication services can also be provided by Remote Radio Head.
  • RRH indoor small base station
  • the term "cell” or “sector” refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that perform communication services in this coverage. Refers to.
  • MS Mobile Station
  • UE User Equipment
  • Mobile stations are defined by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmission device, a reception device, a communication device, or the like.
  • at least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned type or unmanned type). ) May be sufficient.
  • at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operation.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be replaced by the user terminal.
  • the communication between the base station and the user terminal is replaced with the communication between the plurality of user devices 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • the user device 20 may have the function of the above-described base station device 10.
  • the words such as “up” and “down” may be replaced with the words corresponding to the communication between terminals (for example, “side”).
  • the uplink channel and the downlink channel may be replaced with the side channel.
  • the user terminal in the present disclosure may be replaced by the base station.
  • the base station may have the function of the above-mentioned user terminal.
  • determining and “determining” as used in this disclosure may encompass a wide variety of actions.
  • “Judgment” and “decision” include, for example, judgment, calculation, computing, processing, processing, deriving, investigating, and looking up, search, inquiry. (Eg, searching in a table, database, or another data structure), ascertaining to be regarded as “judgment” and “decision” may be included.
  • “decision” and “decision” include receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), access (accessing) (for example, accessing data in a memory) may be regarded as “judging” and “deciding”.
  • judgment and “decision” are considered to be “judgment” and “decision” when things such as resolving, selecting, choosing, choosing, establishing, and comparing are done. May be included. That is, the “judgment” and “decision” may include considering some action as “judgment” and “decision”. In addition, “determination (decision)” may be read as “assuming,” “expecting,” “considering,” and the like.
  • connection means any direct or indirect connection or coupling between two or more elements, and It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled”.
  • the connections or connections between the elements may be physical, logical, or a combination thereof.
  • connection may be read as “access”.
  • two elements are in the radio frequency domain, with at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-exhaustive examples. , Can be considered to be “connected” or “coupled” to each other, such as with electromagnetic energy having wavelengths in the microwave region and the light (both visible and invisible) region.
  • the reference signal may be abbreviated as RS (Reference Signal), or may be referred to as a pilot (Pilot) depending on the applied standard.
  • RS Reference Signal
  • Pilot pilot
  • 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.”
  • references to elements using the designations “first,” “second,” etc. as used in this disclosure does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements may be employed, or that the first element must precede the second element in any way.
  • the radio frame may be composed 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 be composed of one or more slots in the time domain. The subframe may have a fixed time length (for example, 1 ms) that does not depend on numerology.
  • Numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, radio frame configuration, transceiver At least one of a specific filtering process performed in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be shown.
  • a slot may be composed 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 time unit based on numerology.
  • a slot may include multiple minislots. Each minislot may be composed of one or more symbols in the time domain. The minislot may also be called a subslot. Minislots may be configured with a smaller number of symbols than slots.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent the time unit when transmitting a signal. Radio frames, subframes, slots, minislots, and symbols may have different names corresponding to them.
  • one subframe may be called a transmission time interval (TTI)
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI means, for example, a minimum time unit of scheduling in wireless communication.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth that can be used in each user device 20, transmission power, etc.) to each user device 20 in units of TTI.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit of a channel-encoded data packet (transport block), code block, codeword, or the like, or may be a processing unit of scheduling, link adaptation, or the like.
  • the time interval for example, the number of symbols
  • the transport block, code block, codeword, etc. may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling.
  • the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • a TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and a short TTI (eg, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or more continuous subcarriers in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
  • the number of subcarriers included in the RB may be determined based on numerology.
  • the time domain of the RB may include one or more symbols, and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may be configured with one or a plurality of resource blocks.
  • One or more RBs are physical resource blocks (PRB: Physical RB), subcarrier groups (SCG: Sub-Carrier Group), resource element groups (REG: Resource Element Group), PRB pairs, RB pairs, etc. May be called.
  • PRB Physical resource blocks
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pairs RB pairs, etc. May be called.
  • the resource block may be composed of one or more resource elements (RE: Resource Element).
  • RE Resource Element
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a bandwidth part (may be called a partial bandwidth) may represent a subset of continuous common RBs (common resource blocks) for a certain numerology in a certain carrier.
  • the common RB may be specified by the index of the RB based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • BWP for UL
  • DL BWP BWP for DL
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE does not have to expect to send and receive a given signal / channel outside the active BWP.
  • BWP bitmap
  • the above-mentioned structure of the radio frame, subframe, slot, minislot, symbol, etc. is merely an example.
  • the number of subframes included in the radio frame, the number of slots per subframe or radio frame, the number of minislots included in the slot, the number of symbols and RBs included in the slot or minislot, and included in the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and the like can be variously changed.
  • the term “A and B are different” may mean “A and B are different from each other”.
  • the term may mean that “A and B are different from C”.
  • the terms “remove”, “coupled” and the like may be construed as “different” as well.
  • the notification of the predetermined information (for example, the notification of “being X”) is not limited to the explicit notification, and is performed implicitly (for example, the notification of the predetermined information is not performed). Good.
  • the TPC command is an example of the transmission power control command.
  • P 0 or ⁇ is an example of a parameter that determines the transmission power associated with another user equipment.
  • base station device 110 transmission unit 120 reception unit 130 setting unit 140 control unit 20 user device 210 transmission unit 220 reception unit 230 setting unit 240 control unit 1001 processor 1002 storage device 1003 auxiliary storage device 1004 communication device 1005 input device 1006 output device

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un dispositif utilisateur comprenant : une unité de transmission destinée à réaliser une transmission, par l'intermédiaire d'une communication inter-terminaux directe, vers une pluralité d'autres dispositifs utilisateur ; une unité de réception destinée à recevoir une instruction de commande de puissance de transmission, correspondant à la transmission par l'intermédiaire de la communication inter-terminaux directe, à partir de la pluralité d'autres dispositifs utilisateur ; et une unité de commande destinée à déterminer, en fonction de l'instruction de commande de puissance de transmission, la puissance de transmission à appliquer à la communication inter-terminaux directe. L'unité de transmission applique la puissance de transmission déterminée de sorte à effectuer une transmission vers la pluralité d'autres dispositifs utilisateurs.
PCT/JP2018/039998 2018-10-26 2018-10-26 Dispositif utilisateur WO2020084788A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017063371A (ja) * 2015-09-25 2017-03-30 シャープ株式会社 通信装置、通信処理方法、およびプログラム

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JP2017063371A (ja) * 2015-09-25 2017-03-30 シャープ株式会社 通信装置、通信処理方法、およびプログラム

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"Initial view on enhancements of unicast and groupcast communication", 3GPP TSG RAN WG1 MEETING #94BIS R1-1811162, 12 October 2018 (2018-10-12), XP051518563 *
LENOVO ET AL.: "Support of unicast, groupcast and broadcast in NR V2X", 3GPP TSG RAN WG1 MEETING #94BIS R1-1810573, 12 October 2018 (2018-10-12), XP051517980 *
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