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WO2025079607A1 - Terminal et procédé de communication - Google Patents

Terminal et procédé de communication Download PDF

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Publication number
WO2025079607A1
WO2025079607A1 PCT/JP2024/036110 JP2024036110W WO2025079607A1 WO 2025079607 A1 WO2025079607 A1 WO 2025079607A1 JP 2024036110 W JP2024036110 W JP 2024036110W WO 2025079607 A1 WO2025079607 A1 WO 2025079607A1
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WO
WIPO (PCT)
Prior art keywords
terminal
resource
rat
resources
information
Prior art date
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Pending
Application number
PCT/JP2024/036110
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English (en)
Japanese (ja)
Inventor
太一 七條
翔平 吉岡
浩樹 原田
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NTT Docomo Inc
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NTT Docomo Inc
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Publication date
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Publication of WO2025079607A1 publication Critical patent/WO2025079607A1/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
    • H04W4/30—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
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • 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 terminal and a communication method in a wireless communication system.
  • D2D reduces traffic between terminals and base stations, and enables communication between terminals even if the base station becomes unable to communicate due to a disaster or other reason.
  • 3GPP registered trademark
  • 3rd Generation Partnership Project refers to D2D as "sidelink,” but in this specification, the more general term D2D is used. However, in the explanation of the embodiments described later, sidelink will also be used as necessary.
  • the sidelink of one RAT supports a transmission mode in which the terminal autonomously determines the resources to be used for transmission.
  • the sidelink of another RAT supports a transmission mode in which the terminal autonomously determines the resources to be used for transmission.
  • the terminals detect future resource use by decoding each other's signals and operate in a way that prevents collisions from occurring.
  • the resources for that transmission must be excluded from the candidates.
  • a terminal is provided with a resource pool of a first RAT (Radio Access Technology) and a resource pool of a second RAT that overlap each other, the resource pool of the first RAT includes a communication unit that acquires information related to the first RAT, and a control unit that excludes candidate resources from a candidate resource set in the second RAT based on the information related to the first RAT in a specific time interval, the control unit selects resources from the candidate resource set, and the communication unit transmits a shared channel to another terminal using the selected resources.
  • a first RAT Radio Access Technology
  • the disclosed technology enables resources to be shared between direct communications between terminals using different RATs (Radio Access Technologies).
  • RATs Radio Access Technologies
  • FIG. 1 is a diagram for explaining V2X.
  • FIG. 1 is a sequence diagram showing an operation example (1) of V2X.
  • FIG. 11 is a sequence diagram showing an operation example (2) of V2X.
  • FIG. 11 is a sequence diagram showing an operation example (3) of V2X.
  • FIG. 11 is a sequence diagram showing an operation example (4) of V2X.
  • FIG. 11 is a diagram illustrating an example of a sensing operation.
  • 11 is a flowchart illustrating an example of a preemption operation.
  • FIG. 13 illustrates an example of a preemption operation.
  • FIG. 13 is a diagram illustrating an example of a partial sensing operation.
  • FIG. 13 is a diagram for explaining an example of periodic partial sensing.
  • FIG. 13 is a diagram for explaining an example of continuous partial sensing.
  • FIG. 1 is a diagram for explaining an example of resource sharing in an embodiment of the present invention.
  • 1 is a flowchart illustrating an example of resource sharing in an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention.
  • 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention.
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • another method e.g., Flexible Duplex, etc.
  • radio parameters and the like when radio parameters and the like are “configured,” it may mean that predetermined values are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are configured.
  • V2X using LTE or NR cellular and terminal-to-terminal communications is also called cellular V2X.
  • cellular V2X For NR V2X, studies are underway to achieve high capacity, low latency, high reliability, and QoS (Quality of Service) control.
  • LTE or NR V2X will not be limited to 3GPP specifications. For example, it is expected that studies will be conducted on ensuring interoperability, reducing costs by implementing higher layers, methods for using or switching between multiple RATs (Radio Access Technologies), compliance with regulations in each country, and methods for acquiring, distributing, managing databases, and using data on LTE or NR V2X platforms.
  • RATs Radio Access Technologies
  • 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, the communication device may be a base station, an RSU, a relay station (relay node), a terminal with scheduling capability, etc.
  • Mode 3 and Mode 4 are specified for SL resource allocation to the terminal 20.
  • transmission resources are dynamically allocated by DCI (Downlink Control Information) transmitted from the base station 10 to the terminal 20.
  • DCI Downlink Control Information
  • SPS Semi Persistent Scheduling
  • the terminal 20 autonomously selects transmission resources from a resource pool.
  • the slot in the embodiments of the present invention may be interpreted as a symbol, minislot, subframe, radio frame, or TTI (Transmission Time Interval).
  • a slot is an example of a unit of time, and may be replaced with a term indicating a different unit of time.
  • a cell in the embodiments of the present invention may be interpreted as a cell group, carrier component, BWP, resource pool, resource, RAT (Radio Access Technology), system (including wireless LAN), etc.
  • terminal 20 when there is no particular distinction between terminals 20A, 20B, etc., they will be simply referred to as "terminal 20" or "user device.”
  • terminal 20 or “user device.”
  • FIG. 2 as an example, a case is shown in which terminals 20A and 20B are both within the coverage of a cell, but the operation in the embodiment of the present invention can also be applied to a case in which terminal 20B is outside the coverage.
  • the signal waveform used by the terminal 20 for SL or UL may be OFDMA, SC-FDMA, or another signal waveform.
  • the terminal 20 transmits a Sidelink Synchronization Signal Block (S-SSB).
  • S-SSB may include the Sidelink Primary Synchronization Signal (S-PSS), the Sidelink Secondary Synchronization Signal (S-SSS), and the Physical Sidelink Broadcast Channel (PSBCH).
  • S-PSS Sidelink Primary Synchronization Signal
  • S-SSS Sidelink Secondary Synchronization Signal
  • PSBCH Physical Sidelink Broadcast Channel
  • names such as S-SSB, S-PSS, and S-SSS are merely examples, and names other than S-SSB, S-PSS, and S-SSS may also be used.
  • terminal 20A transmits SCI (Sidelink Control Information) via PSCCH and/or PSSCH using the resources autonomously selected in step S101, and transmits SL data via PSSCH.
  • SCI Servicelink Control Information
  • terminal 20A may transmit PSCCH using frequency resources that are adjacent or non-adjacent to the frequency resources of PSSCH, with time resources that are the same as at least a portion of the time resources of PSSCH.
  • step S105 if the HARQ-ACK received in step S104 indicates a request for retransmission, i.e., if it is a NACK (negative response), the terminal 20A retransmits the PSCCH and PSSCH to the terminal 20B.
  • the terminal 20A may retransmit the PSCCH and PSSCH using autonomously selected resources.
  • steps S104 and S105 do not need to be performed.
  • FIG. 3 is a sequence diagram showing an example of V2X operation (2). Blind retransmission without HARQ control may be performed to improve the transmission success rate or reach.
  • FIG. 4 is a sequence diagram showing an example (3) of V2X operation.
  • the base station 10 may perform sidelink scheduling. That is, the base station 10 may determine the sidelink resources to be used by the terminal 20 and transmit information indicating the resources to the terminal 20. Furthermore, when HARQ control involving HARQ feedback is applied, the base station 10 may transmit information indicating the PSFCH resources to the terminal 20.
  • a transmission trigger in the terminal 20 occurs in slot n, and the priority of the transmission is p TX .
  • the terminal 20 can detect, for example, that another terminal 20 is transmitting with priority p RX in the sensing window from slot n-T 0 to the slot immediately before slot n-T proc,0 .
  • RSRP Reference Signal Received Power
  • the threshold may be, for example, a threshold Th pTX,pRX that is set or defined for each resource in the sensing window based on the priority p TX and the priority p RX .
  • the threshold value Th pTX,pRX set for each resource of the sensing window may be increased by 3 dB and resource identification may be performed again. That is, by increasing the threshold value Th pTX,pRX and performing resource identification again, the number of resources that are not excluded because the RSRP is less than the threshold value may be increased so that the set of resource candidates S A becomes 20% or more of the resource selection window.
  • the operation of increasing the threshold value Th pTX,pRX set for each resource of the sensing window by 3 dB and performing resource identification again may be repeated.
  • the lower layer of the terminal 20 may report S A to the upper layer.
  • the upper layer of the terminal 20 may perform random selection on S A to determine a resource to be used.
  • the terminal 20 may perform sidelink transmission using the determined resource.
  • the upper layer may be a MAC layer
  • the lower layer may be a PHY layer or a physical layer.
  • step S504 the terminal 20 re-identifies each resource in the resource selection window based on the sensing result at the timing of T(r_0) -T3 shown in FIG. 8 to determine a set of resource candidates S A , and further determines preemption for the resource set (r_0, r_1, ...) based on the priority.
  • r_1 shown in FIG. 8 is not included in S A because the SCI transmitted from the other terminal 20 has been detected by re-sensing.
  • preemption is valid only for a specific priority (for example, sl-PreemptionEnable is any of pl1, pl2, ..., pl8)
  • this priority is set as prio_pre.
  • the terminal 20 determines that the resource r_1 has been preempted.
  • Fig. 9 shows an example in which subframe t 0 SL to subframe t Tmax-1 SL are set as a resource pool.
  • the target area of the resource pool may be set by, for example, a bitmap.
  • a transmission trigger in terminal 20 is assumed to occur in subframe n.
  • Y subframes from subframe t y1 SL to subframe t yY SL may be set as a resource selection window.
  • the terminal 20 can detect, for example, that another terminal 20 is transmitting in one or more sensing targets from subframe t y1-k ⁇ Pstep SL to subframe t yY-k ⁇ Pstep SL , which is Y subframe length.
  • k may be determined by, for example, a 10-bit bitmap.
  • FIG. 9 shows an example in which the third and sixth bits of the bitmap are set to "1" indicating that partial sensing is performed. That is, in FIG. 9, subframe t y1-6 ⁇ Pstep SL to subframe t yY-6 ⁇ Pstep SL and subframe t y1-3 ⁇ Pstep SL to subframe t yY-3 ⁇ Pstep SL are set as sensing targets.
  • k may be set by a 10-bit bitmap or may be predefined, and P step may be 100 ms.
  • P step may be (U/(D+S+U))*100 ms.
  • U corresponds to the number of UL subframes
  • D corresponds to the number of DL subframes
  • S corresponds to the number of special subframes.
  • the threshold may be, for example, a threshold Th pTX,pRX that is set or defined for each resource in the sensing target based on the sender priority p TX and the receiver priority p RX .
  • the terminal 20 identifies resources occupied by other UEs, and the resources excluding the identified resources become available resource candidates. Note that the Y subframe does not have to be consecutive. If a set of available resource candidates is S A , when S A is less than 20% of the resources in the resource selection window, the threshold Th pTX,pRX set for each sensing target resource may be increased by 3 dB and resource identification may be performed again.
  • the lower layer of the terminal 20 may report S B to the upper layer.
  • the upper layer of the terminal 20 may perform random selection on S B to determine the resource to be used.
  • the terminal 20 may perform sidelink transmission using the determined resource. After reserving the resource once, the terminal 20 may use the resource periodically without performing sensing for a predetermined number of times (e.g., C resel times).
  • a terminal 20 to which partial sensing is applied performs reception and sensing only in specific slots within the sensing window. That is, the terminal 20 may perform resource identification by sensing only limited resources compared to full sensing, and perform partial sensing to select resources from the identified resource set. The terminal 20 may also perform random selection to select resources from the identified resource set by setting the resources in the resource selection window as the identified resource set without excluding resources from the resources in the resource selection window.
  • the method of performing random selection at the time of resource selection and using sensing information during reevaluation or preemption checks may be treated as partial sensing or as random selection.
  • sensing may be 1) and 2) shown below. Note that sensing and monitoring may be interchangeable, and the operations may include at least one of measuring the received RSRP, obtaining reservation resource information, and obtaining priority information.
  • SL-DRX discontinuous reception
  • reception operations are only performed during a specified time period.
  • FIG 10 is a diagram for explaining an example of periodic partial sensing. As shown in FIG 10, Y candidate slots for resource selection are selected from a resource selection window [n+ T1 , n+ T2 ].
  • Sensing may be performed by regarding t y SL as one slot included in the Y candidate slots and t y ⁇ k ⁇ Preserve SL as a target slot for periodic partial sensing.
  • Fig. 11 is a diagram for explaining an example of continuous partial sensing.
  • the terminal 20 selects Y candidate slots for resource selection from the resource selection window [n+ T1 , n+ T2 ].
  • the head of the Y candidate slots is represented as slot t y1 , the next slot as t y2 , ..., and the end of the Y candidate slots as slot t yY .
  • inter-terminal coordination has been specified as a method for improving reliability and delay performance.
  • the inter-terminal coordination method 1 and inter-terminal coordination method 2 shown below have been specified.
  • the terminal 20 that transmits coordination information will be referred to as UE-A
  • the terminal 20 that receives the coordination information will be referred to as UE-B.
  • the embodiments of the present invention may be applied to any subcarrier spacing of the NR resource pool, including 15 kHz, 30 kHz, 60 kHz, and 120 kHz.
  • NR resource selection may be performed by any of resource exclusion, resource selection, resource reselection, reevaluation, and preemption checks at the NR PHY layer.
  • the sidelink grant for LTE-V2X considered in NR resource selection in DRPS may be limited to information that assumes that LTE transmission will be performed by the sidelink grant in the NR sidelink resource selection window [n+T1, n+T2].
  • the assumption may be determined by referring to any one or more of 1)-5) shown below.
  • NR resource exclusion process may be performed based on the grant.
  • the above-mentioned embodiment may be applied only when a certain condition is satisfied. For example, it may be applied in relation to a certain SL channel or SL signal. For example, this embodiment may be applied to any of PSCCH/PSSCH, PSFCH, S-SSB, and SL positioning RS. For example, it may be applied based on a certain setting or pre-setting. For example, this embodiment may be applied when "enabling" this embodiment is given by setting or pre-setting in the resource pool. For example, this embodiment may not be applied when the LBT method related to the second SL transmission is not or is no longer type 1.
  • an additional transmission such as a CP extension, may be performed immediately before transmission.
  • At least one of the UE's SL transmissions may be UL transmission.
  • This embodiment may be applied to resource selection, resource reselection, reevaluation, and preemption checks.
  • the above-described embodiment is not limited to V2X terminals, but may also be applied to terminals that perform D2D communication.
  • the above-described embodiment makes it possible to exclude resources that overlap in the time domain with resources corresponding to sidelink grants in LTE-V2X from resource candidates, thereby preventing them from affecting LTE communications.
  • the setting unit 130 stores in a storage device the setting information that is set in advance and various setting information to be transmitted to the terminal 20, and reads it from the storage device as necessary.
  • the content of the setting information is, for example, information related to the setting of D2D communication.
  • the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
  • the receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals.
  • the receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals or reference signals, etc. transmitted from the base station 10.
  • the transmitter 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to another terminal 20 as D2D communication, and the receiver 220 receives PSCCH, PSSCH, PSDCH, PSBCH, etc. from the other terminal 20.
  • the storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc.
  • the storage device 1002 may also be called a register, a cache, a main memory, etc.
  • the storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc.
  • the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
  • the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).
  • Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.
  • the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
  • the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
  • the communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
  • the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input.
  • the PUSCH transmitted by the communication module 2013 may include information based on the above input.
  • the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on the information service unit 2012 provided in the vehicle 2001.
  • the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
  • the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
  • the specific time interval may be specified in terms of unit time in the first RAT.
  • the above configuration makes it possible to exclude resources that overlap in the time domain with resources corresponding to sidelink grants in LTE-V2X from resource candidates so as not to affect LTE communications.
  • resources can be shared between direct communications between terminals using different RATs (Radio Access Technologies).
  • the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
  • the order of the processing procedures described in the embodiment may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
  • the software operated by the processor possessed by the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • the present invention may be applied to at least one of the following systems using appropriate systems: IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), NR (new Radio Access), New radio access (NX), Future generation radio access (FX), 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-Wide Band), Bluetooth (registered trademark), and next-generation systems that are expanded, modified, created, or defined based on these.
  • the present invention may be applied to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).
  • At least one of the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
  • base station BS
  • radio base station base station
  • base station fixed station
  • NodeB eNodeB
  • gNodeB gNodeB
  • access point e.g., "transmission point”
  • gNodeB gNodeB
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
  • At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
  • the moving object is a movable object, and the moving speed is arbitrary. It also includes the case where the moving object is stopped.
  • the user terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions of the user terminal described above.
  • the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • radio frame structure a specific filtering process performed by the transceiver in the frequency domain
  • a specific windowing process performed by the transceiver in the time domain etc.
  • a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.).
  • a slot may be a time unit based on numerology.
  • one subframe may be called a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
  • the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
  • the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
  • the time interval e.g., the number of symbols
  • the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
  • TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot, etc.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers included in an RB may be determined based on the numerology.
  • the time domain of an 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 each be composed of one or more resource blocks.
  • one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
  • PRB physical resource block
  • SCG sub-carrier group
  • REG resource element group
  • PRB pair an RB pair, etc.
  • a bandwidth part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within the BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be configured within one carrier for the terminal 20.
  • radio frames, subframes, slots, minislots, and symbols are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Ce terminal comprend : une unité de communication qui, dans un groupe de ressources d'une première technologie d'accès radio (RAT) parmi le groupe de ressources de la première RAT et un groupe de ressources d'une seconde RAT qui se chevauchent, acquiert des informations concernant la première RAT ; et une unité de commande qui exclut une ressource candidate d'un ensemble de ressources candidates dans la seconde RAT sur la base des informations concernant la première RAT dans un segment temporel spécifique, l'unité de commande sélectionnant une ressource à partir de l'ensemble de ressources candidates, et l'unité de communication utilisant la ressource sélectionnée pour transmettre un canal partagé à un autre terminal.
PCT/JP2024/036110 2023-10-10 2024-10-09 Terminal et procédé de communication Pending WO2025079607A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-175330 2023-10-10
JP2023175330 2023-10-10

Publications (1)

Publication Number Publication Date
WO2025079607A1 true WO2025079607A1 (fr) 2025-04-17

Family

ID=95395675

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/036110 Pending WO2025079607A1 (fr) 2023-10-10 2024-10-09 Terminal et procédé de communication

Country Status (1)

Country Link
WO (1) WO2025079607A1 (fr)

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CATT, GOHIGH: "Discussion on co-channel coexistence for LTE sidelink and NR sidelink", 3GPP DRAFT; R1-2302706, vol. 3GPP RAN 1, 7 April 2023 (2023-04-07), pages 1 - 17, XP052352190 *
KEVIN LIN, OPPO: "On maintenance of co-channel coexistence for LTE and NR SL", 3GPP DRAFT; R1-2309589; TYPE DISCUSSION; NR_SL_ENH2-CORE, vol. RAN WG1, 29 September 2023 (2023-09-29), Xiamen, CN, pages 1 - 4, XP052527303 *
WEI ZENG, APPLE: "On Remaining Issues of Co-channel Coexistence", 3GPP DRAFT; R1-2309829; TYPE DISCUSSION; NR_SL_ENH2-CORE, vol. RAN WG1, 29 September 2023 (2023-09-29), Xiamen, CN, pages 1 - 5, XP052527543 *

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