WO2021245526A1 - Appareil et procédé de communication sans fil - Google Patents

Appareil et procédé de communication sans fil Download PDF

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Publication number
WO2021245526A1
WO2021245526A1 PCT/IB2021/054744 IB2021054744W WO2021245526A1 WO 2021245526 A1 WO2021245526 A1 WO 2021245526A1 IB 2021054744 W IB2021054744 W IB 2021054744W WO 2021245526 A1 WO2021245526 A1 WO 2021245526A1
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WO
WIPO (PCT)
Prior art keywords
channel access
uplink transmission
type
channel
dci
Prior art date
Application number
PCT/IB2021/054744
Other languages
English (en)
Inventor
Hao Lin
Original Assignee
Orope France Sarl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orope France Sarl filed Critical Orope France Sarl
Publication of WO2021245526A1 publication Critical patent/WO2021245526A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present disclosure relates to the field of communication systems, and more particularly, to an apparatus and a method of wireless communication, which can provide a good communication performance and/or high reliability.
  • an unlicensed spectrum is a shared spectrum.
  • Communication equipment in different communication systems can use the unlicensed spectrum as long as the unlicensed meets regulatory requirements set by countries or regions on a spectrum. There is no need to apply for a proprietary spectrum authorization from a government.
  • some countries or regions specify regulatory requirements that must be met to use the unlicensed spectrum. For example, a communication device follows a listen before talk (LBT) or channel access procedure, that is, the communication device needs to perform a channel sensing before transmitting a signal on a channel.
  • LBT listen before talk
  • channel access procedure that is, the communication device needs to perform a channel sensing before transmitting a signal on a channel.
  • the communication device can perform signal transmission; otherwise, the communication device cannot perform signal transmission.
  • a transmission duration cannot exceed a maximum channel occupancy time (MCOT).
  • MCOT maximum channel occupancy time
  • An object of the present disclosure is to propose an apparatus (such as a user equipment (UE) and/or a base station) and a method of wireless communication, which can solve issues in the prior art, provide a channel access relevant indication for more than one scheduled uplink transmission by a same downlink control indicator (DCI) in a shared spectrum, reduce signaling overhead, provide a good communication performance, and/or provide high reliability.
  • DCI downlink control indicator
  • a method of wireless communication by a user equipment comprises being configured by a base station with a downlink control indicator (DCI), wherein the DCI is configured to indicate a first channel access procedure and schedule a first uplink transmission and a second uplink transmission, and using the first channel access procedure indicated by the DCI for the first uplink transmission.
  • DCI downlink control indicator
  • a method of wireless communication by a base station comprises configuring, to a user equipment (UE), a downlink control indicator (DCI), wherein the DCI is configured to indicate a first channel access procedure and schedule a first uplink transmission and a second uplink transmission, and configuring the UE to use the first channel access procedure indicated by the DCI for the first uplink transmission.
  • UE user equipment
  • DCI downlink control indicator
  • a user equipment comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured by a base station with a downlink control indicator (DCI), wherein the DCI is configured to indicate a first channel access procedure and schedule a first uplink transmission and a second uplink transmission, and the processor is configured to use the first channel access procedure indicated by the DCI for the first uplink transmission.
  • DCI downlink control indicator
  • a base station comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to configure, to a user equipment (UE), a downlink control indicator (DCI), wherein the DCI is configured to indicate a first channel access procedure and schedule a first uplink transmission and a second uplink transmission, and the processor is configured to configure the UE to use the first channel access procedure indicated by the DCI for the first uplink transmission.
  • UE user equipment
  • DCI downlink control indicator
  • a non-transitory machine -readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.
  • a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.
  • a computer readable storage medium in which a computer program is stored, causes a computer to execute the above method.
  • a computer program product includes a computer program, and the computer program causes a computer to execute the above method.
  • a computer program causes a computer to execute the above method.
  • FIG. 1 is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB) of communication in a communication network system according to an embodiment of the present disclosure.
  • UEs user equipments
  • gNB base station
  • FIG. 2 is a flowchart illustrating a method of wireless communication performed by a user equipment (UE) according to an embodiment of the present disclosure.
  • UE user equipment
  • FIG. 3 is a flowchart illustrating a method of wireless communication performed by a base station according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram illustrating that a base station (e.g., gNB) sends a downlink control indicator (DCI) to schedule two uplinks, e.g., uplink 1 and uplink 2, where the two uplinks are not consecutive in time domain, and the uplink 2 is within a gNB’s channel occupancy (CO) according to an embodiment of the present disclosure.
  • DCI downlink control indicator
  • FIG. 5 is a schematic diagram illustrating that a base station (e.g., gNB) sends a DCI to schedule two uplinks, e.g., uplink 1 and uplink 2, where the two uplinks are not consecutive in time domain, and a subset of symbols of the uplink 2 are within the gNB’s channel occupancy (CO) according to an embodiment of the present disclosure.
  • a base station e.g., gNB
  • CO channel occupancy
  • FIG. 6 is a schematic diagram illustrating that a base station (e.g., gNB) sends a DCI to schedule two uplinks, e.g., uplink 1 and uplink 2, where the two uplinks are not consecutive in time domain, and the uplink 2 is outside the gNB’s channel occupancy (CO) according to an embodiment of the present disclosure.
  • a base station e.g., gNB
  • CO channel occupancy
  • FIG. 7 is a schematic diagram illustrating that the uplink 2 is located in the same RB sets in which the uplink 1 is located according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram illustrating that the uplink 2 is located in a subset of the RB sets in which the uplink 1 is located according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram illustrating that the RB sets of the uplink 2 is not covered by the uplink 1 according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram illustrating that the uplink 2 is located in a set of symbols within the maximum UE channel occupancy duration in time domain.
  • FIG. 11 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.
  • FIG. 1 illustrates that, in some embodiments, one or more user equipments (UEs) 10 and a base station (e.g., gNB) 20 for transmission adjustment in a communication network system 30 according to an embodiment of the present disclosure are provided.
  • the communication network system 30 includes the one or more UEs 10 and the base station 20.
  • the one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13.
  • the base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23.
  • the processor 11 or 21 may be configured to implement proposed functions, procedures and/or methods described in this description.
  • Layers of radio interface protocol may be implemented in the processor 11 or 21.
  • the memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21.
  • the transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and/or receives a radio signal.
  • the processor 11 or 21 may include application- specific integrated circuit (ASIC), other chipset, logic circuit and/or data processing device.
  • the memory 12 or 22 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and/or other storage device.
  • the transceiver 13 or 23 may include baseband circuitry to process radio frequency signals.
  • modules e.g., procedures, functions, and so on
  • the modules can be stored in the memory 12 or 22 and executed by the processor 11 or 21.
  • the memory 12 or 22 can be implemented within the processor 11 or 21 or external to the processor 11 or 21 in which case those can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.
  • the processor 11 is configured by the base station 20 with a downlink control indicator (DCI), wherein the DCI is configured to indicate a first channel access procedure and schedule a first uplink transmission and a second uplink transmission, and the processor 11 is configured to use the first channel access procedure indicated by the DCI for the first uplink transmission.
  • DCI downlink control indicator
  • This can solve issues in the prior art, provide a channel access relevant indication for more than one scheduled uplink transmission by a same downlink control indicator (DCI) in a shared spectrum, reduce signaling overhead, provide a good communication performance, and/or provide high reliability.
  • the processor 21 is configured to configure, to the UE 10, a downlink control indicator (DCI), wherein the DCI is configured to indicate a first channel access procedure and schedule a first uplink transmission and a second uplink transmission, and the processor 21 is configured to configure the UE 10 to use the first channel access procedure indicated by the DCI for the first uplink transmission.
  • DCI downlink control indicator
  • FIG. 2 illustrates a method 200 of wireless communication by a user equipment (HE) according to an embodiment of the present disclosure.
  • the method 200 includes: a block 202, being configured by a base station with a downlink control indicator (DCI), wherein the DCI is configured to indicate a first channel access procedure and schedule a first uplink transmission and a second uplink transmission, and a block 204, using the first channel access procedure indicated by the DCI for the first uplink transmission.
  • DCI downlink control indicator
  • FIG. 3 illustrates a method 300 of wireless communication by a base station according to an embodiment of the present disclosure.
  • the method 300 includes: a block 302, configuring, to a user equipment (UE), a downlink control indicator (DCI), wherein the DCI is configured to indicate a first channel access procedure and schedule a first uplink transmission and a second uplink transmission, and a block 304, configuring the UE to use the first channel access procedure indicated by the DCI for the first uplink transmission.
  • DCI downlink control indicator
  • the method further comprises the UE using a type 2A channel access procedure without applying a cyclic prefix (CP) extension for the second uplink transmission if the second uplink transmission is within a channel occupancy time of the base station.
  • the method further comprises the UE using a type 1 channel access procedure without applying a CP extension for the second uplink transmission if the second uplink transmission is outside a channel occupancy time of the base station.
  • the first uplink transmission and the second uplink transmission are non-contiguous transmissions.
  • the first uplink transmission comprises a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference signal (SRS).
  • the second uplink transmission comprises an SRS, a PUSCH, or a PUCCH.
  • the UE is configured to use a first channel access information to perform a second channel access procedure for the second uplink transmission.
  • the DCI comprises a channel access indication field, and the channel access indication field indicates a second channel access information.
  • the first channel access information and/or the second channel access information comprises a channel access type and/or a cyclic prefix (CP) extension.
  • the first channel access information is same as the second channel access information.
  • the first channel access information same as the second channel access information comprises at least one of the followings: the channel access type in the first channel access information same as the channel access type in the second channel access information; or the CP extension in the first channel access information same as the CP extension in the second channel access information.
  • the first channel access information is same as the second access information when a first condition is met.
  • the first condition is relevant to the channel access indication field in the DCI.
  • the first condition comprises the channel access indication field configured to indicate a first channel access type and/or the second uplink transmission or a subset of symbols of the second uplink transmission within or outside a channel occupancy.
  • the first channel access type comprises at least one of the followings: a type 1 channel access, a type 2A channel access, a type 2B channel access, or a type 2C channel access.
  • the first channel access information comprises a default channel access information.
  • the default channel access information comprises a default channel access type and/or a default CP extension. In some embodiments, a value of the default CP extension is equal to zero.
  • the default channel access type comprises at least one of the followings: a type 1 channel access, a type 2A channel access, or a type 2C channel access. In some embodiments, the default channel access type comprises the type 2A channel access or the type 2C channel access if the second uplink transmission is within the channel occupancy. In some embodiments, the default channel access type comprises the type 1 channel access if the second uplink transmission is outside the channel occupancy.
  • the first channel access information comprises the default channel access information when a second condition is met. In some embodiments, the second condition is relevant to the channel access indication field in the DCI.
  • the second condition comprises the channel access indication field configured to indicate a second channel access type.
  • the second channel access type comprises at least one of the followings: a type 1 channel access, a type 2A channel access, a type 2B channel access, or a type 2C channel access.
  • the first uplink transmission is located in a first set of symbols in time domain, and/or the second uplink transmission is located in a second set of symbols in the time domain.
  • the first uplink transmission is located in a first one or more resource block (RB) sets in frequency domain and/or the second uplink transmission is located in a second one or more RB sets in the frequency domain.
  • RB resource block
  • the first set of symbols are earlier than the second set of symbols in the time domain. In some embodiments, there is a time interval defined between a last symbol of the first set of symbols and an earliest symbol of the second set of symbols. In some embodiments, the time interval is larger than a pre-defined value. In some embodiments, the pre-defined value comprises a symbol duration, 16 micro-second, or 25 micro-second.
  • the second uplink transmission is located in the same RB sets in which the first uplink transmission is located in frequency domain or the second uplink transmission is located in a subset of the RB sets in which the first uplink transmission is located in the frequency domain. In some embodiments, the second uplink transmission is not covered by the first uplink transmission in frequency domain.
  • the channel occupancy is indicated by a second DCI and/or a radio resource control (RRC) signaling.
  • the second DCI comprises a DCI format 2_0.
  • the RRC signaling comprises a parameter configured to indicate a maximum channel occupancy in the time domain.
  • the parameter comprises semiStaticChannelAccessConfig-rl6.
  • the second uplink transmission within the channel occupancy comprises the second set of symbols within the channel occupancy in the time domain and/or the second one or more RB sets in the frequency domain are available for reception within the channel occupancy.
  • the DCI format 2_0 comprises a RB set indicator.
  • the RB set indicator indicates availability for reception for the second one or more RB sets within the channel occupancy.
  • the DCI format 2_0 comprises a slot format indicator (SFI) index and/or a channel occupancy duration.
  • the SFI index and/or the channel occupancy duration indicates the channel occupancy in the time domain.
  • the second uplink transmission comprises a PUSCH, a PUCCH, an SRS, or a physical random access channel (PRACH).
  • the DCI comprises a DCI format 0_1, a DCI format 1_1, or a DCI format 1_0.
  • a UE may perform a channel access procedure before transmitting one or more uplink transmissions in a channel.
  • the channel access procedure comprises a type 1 channel access according to section 4.2.1.1 of TS37.213, or a type 2A channel access according to section 4.2.1.2.1 of TS37.213, or a type 2B channel access according to section 4.2.1.2.2 of TS37.213, or a type 2C channel access according to section 4.2.1.2.3 of TS37.213.
  • a base station e.g., gNB
  • DCI downlink control indicator
  • a HE receives a DCI that schedules two uplink transmissions, i.e., an uplink 1 and an uplink 2, where the uplink 1 and the uplink 2 are not consecutive in time domain, and the uplinkl is earlier than the uplink 2.
  • the DCI includes a channel access indication which indicates a channel access information.
  • the indicated channel access information can be applied for the first uplink transmission.
  • Some embodiments present a method for the UE to determine the channel access information that is to be applied for the uplink 2 transmission.
  • the indicated channel access information comprises a channel access type and/or a cyclic prefix (CP) extension.
  • the UE uses the determined channel access information to perform the channel access procedure according to section 4.2.1.1 or section 4.2.1.2.1 or section 4.2.1.2.2 or section 4.2.1.2.3 of TS37.213 and to perform the second uplink transmission according to section 5.3 of TS 38.211.
  • the method for the UE to determine the channel access information for the uplink 2 transmission comprises the following: The UE can determine that if the indicated channel access type is type 2A channel access or type 1 channel access, the indicated channel access information can be also applied for the uplink 2 transmission.
  • the UE may transmit further uplink (UL) transmissions scheduled by the scheduling DCI using Type 2A UL channel access procedures without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are within the gNB channel occupancy time.
  • UL uplink
  • the UE can determine that when the indicated channel access type is type 2A channel access, the indicated channel access information can be also applied for the uplink 2 transmission, if the uplink 2 transmission is within a gNB ’s channel occupancy, and/or the uplink 2 transmission is within a second channel occupancy, and/or if the uplink 2 transmission has higher or equal channel access priority class (CAPC) than the uplink 1 transmission; and/or if the channel access is successful for the uplink 1 transmission and the UE transmits the uplink 1.
  • the uplink 2 transmission within the gNB’s channel occupancy comprises all the symbols of the uplink 2 within the gNB’s channel occupancy in time domain (as illustrated in FIG.
  • the RB set availability for reception is indicated for a DCI format 2_0 according to section 11.1.1 of TS38.213. But in some examples, if the UE is not configured to monitor DCI format 2_0 or the configured DCI format 2_0 does not include RB set indictor field for RB set availability indication, the UE assumes all the RB sets are available for reception within the gNB’s channel occupancy duration.
  • FIG. 5 illustrates that a base station (e.g., gNB) sends a DCI to schedule two uplinks, e.g., uplink 1 and uplink 2, where the two uplinks are not consecutive in time domain, and a subset of symbols of the uplink 2 are within the gNB’s channel occupancy (CO) according to an embodiment of the present disclosure.
  • FIG. 6 illustrates that a base station (e.g., gNB) sends a DCI to schedule two uplinks, e.g., uplink 1 and uplink 2, where the two uplinks are not consecutive in time domain, and the uplink 2 is outside the gNB ’ s channel occupancy (CO) according to an embodiment of the present disclosure.
  • a base station e.g., gNB
  • CO channel occupancy
  • the uplink 2 is outside the channel occupancy, wherein the channel occupancy comprises the following: the gNB channel occupancy, or the maximum UE channel occupancy, or the second channel occupancy.
  • the UE may transmit further uplink (UL) transmissions using Type 1 channel access procedure, without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are outside the gNB channel occupancy time.
  • the UE may transmit further uplink (UL) transmissions scheduled by the scheduling DCI using Type 2A UL channel access procedures without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are within the gNB channel occupancy time.
  • UL uplink
  • the CAPC is indicated by the DCI, or the CAPC is determined by UE itself based on the traffic carried in the PUSCH.
  • the uplink 1 is SRS or PUCCH
  • the uplink 2 is PUSCH
  • the CAPC of the uplink 2 is indicated by the DCI.
  • the uplink 1 is PUSCH and the uplink 2 is SRS or PUCCH
  • the CAPC of the uplink 1 is indicated by the DCI.
  • the uplink 2 transmission within the second channel occupancy comprises: all the symbols of the uplink 2 are within the gNB’s channel occupancy in time domain and all the RBs in frequency domain allocated for the uplink 2 transmissions are located in the same RB sets or a subset of the RB sets in which the uplink 1 transmission is located.
  • a value of the CP extension for the uplink 2 transmission is equal to zero.
  • the CP extension for the uplink 2 transmission is the indicated The CP extension in the DCI.
  • PIG. 7 illustrates that the uplink 2 is located in the same RB sets in which the uplink 1 is located according to an embodiment of the present disclosure.
  • the uplink 1 is located in two RB sets, i.e., RB set 0 and RB set 1
  • an uplink 2 is located in RB set 0 and RB set 1.
  • the uplink 2 is called to be located in the same RB sets in which the uplink 1 is located.
  • PIG. 8 illustrates that the uplink 2 is located in a subset of the RB sets in which the uplink 1 is located according to an embodiment of the present disclosure.
  • the uplink 1 is located in two RB sets, i.e., RB set 0 and RB set 1, and an uplink 2 is located in RB set 0.
  • all the RB sets in which the uplink 2 is located are also the RB sets in which the uplink 1 is located, but at least one RB set, in which the uplink 1 is located, does not contain the resource for the uplink 2 transmission.
  • the uplink 2 is called to be located in the subset of the RB sets in which the uplink 1 is located.
  • FIG. 9 illustrates that the RB sets of the uplink 2 is not covered by the uplink 1 according to an embodiment of the present disclosure.
  • the uplink 1 is located in two RB sets, i.e., RB set 0 and RB set 1, and an uplink 2 is located in RB set 1 and RB set 2.
  • the uplink 2 is called to be located in the RB sets not covered by the uplink 1 transmission.
  • FIG. 10 illustrates that the uplink 2 is located in a set of symbols within the maximum UE channel occupancy duration in time domain.
  • the UE may transmit further uplink (UL) transmissions using Type 1 channel access procedure, without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are outside the gNB channel occupancy time.
  • UL uplink
  • CP extension a value of the default CP extension is equal to zero
  • the UE may determine that when the indicated channel access type is type 1 channel access, the channel access type for the uplink 2 transmission is type 2A channel access, if the channel access is successful for the uplink 1 transmission and the UE transmits the uplink 1, and/or, if the uplink 2 transmission is within the maximum UE channel occupancy duration, and/or, if the uplink 2 transmission has higher or equal CAPC than the uplink 1.
  • the uplink 2 transmission within the maximum UE channel occupancy duration comprises that the uplink 2 transmission located in the set of symbols that are within the maximum UE channel occupancy duration in time domain (as illustrated in FIG.10), and/or, in frequency domain, the uplink 2 transmission is located in the same RB sets or a subset of the RB sets in which the uplink 1 transmission is located.
  • the maximum UE channel occupancy duration is determined according to section 4.2.1 and table 4.2.1-1 of TS 37.213.
  • the CP extension for the uplink 2 transmission is zero.
  • the CP extension for the uplink 2 transmission is the indicated The CP extension in the DCI.
  • the UE may transmit further uplink (UL) transmissions scheduled by the scheduling DCI using Type 2A UL channel access procedures without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are within the gNB channel occupancy time.
  • the UE may determine that when the indicated channel access type is type 2B channel access, the indicated channel access information can be also applied for the uplink 2 transmission.
  • the indicated channel access information can be also applied for the uplink 2 transmission, if the uplink 2 transmission is within the gNB’s channel occupancy, and/or, if the uplink 2 transmission is within the second channel occupancy, and/or, if the channel access is successful for the uplink 1 transmission and the UE transmits the uplink 1, and/or, if a gap between the end of the uplink 1 transmission and the start of the uplink 2 transmission is smaller than a pre-defined time interval, and/or, if the uplink 2 transmission has higher or equal channel access priority class (CAPC) than the uplink 1 transmission.
  • the time interval is relevant to one symbol, and/or 16 micro-second, and/or 25 micro-second.
  • the UE may transmit further uplink (UL) transmissions scheduled by the scheduling DCI using Type 2A UL channel access procedures without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are within the gNB channel occupancy time.
  • the UE may determine that when the indicated channel access type is type 2B channel access, channel access type for the uplink 2 transmission is type 2C channel access.
  • channel access type for the uplink 2 transmission is type 2C channel access
  • the uplink 2 transmission is within the gNB’s channel occupancy, and/or, if the uplink 2 transmission is within the second channel occupancy, and/or, if the channel access is successful for the uplink 1 transmission and the UE transmits the uplink 1, and/or, if a gap between the end of the uplink 1 transmission and the start of the uplink 2 transmission is smaller than the time interval, and/or, if the uplink 2 transmission has higher or equal channel access priority class (CAPC) than the uplink 1 transmission, and/or if the duration of the uplink 2 transmission is smaller or equal to 584 micro-second, and/or if the duration of the uplink 2 transmission plus the uplink 1 transmission is smaller or equal to 584 micro-second.
  • a value of the CP extension for the uplink 2 transmission is equal to zero.
  • the CP extension for the uplink 2 transmission is the indicated The CP extension
  • the UE may transmit further uplink (UL) transmissions scheduled by the scheduling DCI using Type 2A UL channel access procedures without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are within the gNB channel occupancy time.
  • the UE may determine that when the indicated channel access type is type 2B channel access, channel access type for the uplink 2 transmission is type 2A channel access.
  • channel access type for the uplink 2 transmission is type 2A channel access
  • the uplink 2 transmission is within the gNB’s channel occupancy, and/or, if the uplink 2 transmission is within the second channel occupancy, and/or, if the channel access is successful for the uplink 1 transmission and the UE transmits the uplink 1, and/or, if a gap between the end of the uplink 1 transmission and the start of the uplink 2 transmission is smaller than the time interval, and/or, if the uplink 2 transmission has higher or equal channel access priority class (CAPC) than the uplink 1 transmission.
  • the CP extension for the uplink transmission is the indicated The CP extension in the DCI or a default CP extension.
  • the UE may determine that when the indicated channel access type is type 2C channel access, the indicated channel access information is also applied for the uplink 2 transmission.
  • the indicated channel access information can be also applied for the uplink 2 transmission, if the uplink 2 transmission is within the gNB’s channel occupancy, and/or, if the uplink 2 transmission is within the second channel occupancy, and/or, if the channel access is successful for the uplink 1 transmission and the UE transmits the uplink 1, and/or, if a gap between the end of the uplink 1 transmission and the start of the uplink 2 transmission is smaller than the time interval, and/or, if the uplink 2 transmission has higher or equal channel access priority class (CAPC) than the uplink 1 transmission, and/or, if the duration of the uplink 2 transmission is smaller or equal to 584 micro-second, and/or if the duration of the uplink 2 transmission plus the
  • CAC channel access priority class
  • the UE may transmit further uplink (UL) transmissions scheduled by the scheduling DCI using Type 2A UL channel access procedures without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are within the gNB channel occupancy time.
  • the UE may determine that when the indicated channel access type is type 2C channel access, channel access type for the uplink 2 transmission is type 2A channel access.
  • channel access type for the uplink 2 transmission is type 2A channel access
  • the uplink 2 transmission is within the gNB’s channel occupancy, and/or, if the uplink 2 transmission is within the second channel occupancy, and/or, if the channel access is successful for the uplink 1 transmission and the UE transmits the uplink 1, and/or, if a gap between the end of the uplink 1 transmission and the start of the uplink 2 transmission is smaller than the time interval, and/or, if the uplink 2 transmission has higher or equal channel access priority class (CAPC) than the uplink 1 transmission, and/or if the duration of the uplink 2 transmission is smaller or equal to 584 micro-second, and/or if the duration of the uplink 2 transmission plus the uplink 1 transmission is smaller or equal to 584 micro-second.
  • a value of the CP extension for the uplink 2 transmission is equal to zero.
  • the CP extension for the uplink 2 transmission is the indicated The CP extension
  • the UE may transmit further uplink (UL) transmissions scheduled by the scheduling DCI using Type 2A UL channel access procedures without applying a CP extension (a value of the default CP extension is equal to zero) if the further UL transmissions are within the gNB channel occupancy time.
  • the UE may determine that when the indicated channel access type is type 2C channel access, channel access type for the uplink 2 transmission is type 2B channel access.
  • channel access type for the uplink 2 transmission is type 2B channel access
  • the uplink 2 transmission is within the gNB’s channel occupancy, and/or, if the uplink 2 transmission is within the second channel occupancy, and/or, if the channel access is successful for the uplink 1 transmission and the UE transmits the uplink 1, and/or, if a gap between the end of the uplink 1 transmission and the start of the uplink 2 transmission is smaller than the time interval, and/or, if the uplink 2 transmission has higher or equal channel access priority class (CAPC) than the uplink 1 transmission, and/or if the duration of the uplink 2 transmission is smaller or equal to 584 micro-second, and/or if the duration of the uplink 2 transmission plus the uplink 1 transmission is smaller or equal to 584 micro-second.
  • CAC channel access priority class
  • a value of the CP extension for the uplink 2 transmission is equal to zero.
  • the CP extension for the uplink 2 transmission is the indicated The CP extension in the DCI.
  • the channel access type for the uplink 2 transmission is type 1 channel access.
  • Some embodiments of the present disclosure are a combination of “teclmiques/processes” that can be adopted in 3 GPP specification to create an end product. Some embodiments of the present disclosure could be adopted in the 5G NR unlicensed band communications. Some embodiments of the present disclosure propose technical mechanisms.
  • FIG. 11 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software.
  • FIG. 11 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other at least as illustrated.
  • the application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors.
  • the processors may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system.
  • the baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi core processors.
  • the processors may include a baseband processor.
  • the baseband circuitry may handle various radio control functions that enables communication with one or more radio networks via the RF circuitry.
  • the radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc.
  • the baseband circuitry may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), a wireless local area network (WEAN), a wireless personal area network (WPAN).
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WEAN wireless local area network
  • WPAN wireless personal area network
  • Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuit
  • the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency.
  • baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
  • the RF circuitry 710 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency.
  • RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
  • the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, the baseband circuitry, and/or the application circuitiy.
  • “circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or a memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • some or all of the constituent components of the baseband circuitry, the application circuitry, and/or the memory/storage may be implemented together on a system on a chip (SOC).
  • SOC system on a chip
  • the memory/storage 740 may be used to load and store data and/or instructions, for example, for system.
  • the memory/storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM)), and/or non-volatile memory, such as flash memory.
  • DRAM dynamic random access memory
  • flash memory non-volatile memory
  • the I/O interface 780 may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system.
  • User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc.
  • Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface.
  • the sensor 770 may include one or more sensing devices to determine environmental conditions and/or location information related to the system.
  • the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit.
  • the positioning unit may also be part of, or interact with, the baseband circuitry and/or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
  • GPS global positioning system
  • the display 750 may include a display, such as a liquid crystal display and a touch screen display.
  • the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, an AR/VR glasses, etc.
  • system may have more or less components, and/or different architectures.
  • methods described herein may be implemented as a computer program.
  • the computer program may be stored on a storage medium, such as a non-transitory storage medium.
  • the units as separating components for explanation are or are not physically separated.
  • the units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments.
  • each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.
  • the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer.
  • the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product.
  • one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product.
  • the software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present disclosure.
  • the storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk, or other kinds of media capable of storing program codes.

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

Abstract

L'invention concerne un appareil et un procédé de communication sans fil. Le procédé mis en œuvre par un équipement utilisateur (UE) consiste à être configuré par une station de base avec un indicateur de commande de liaison descendante (DCI), le DCI étant conçu pour indiquer une première procédure d'accès à un canal et planifier une première transmission en liaison montante et une seconde transmission en liaison montante et en utilisant la première procédure d'accès à un canal indiquée par le DCI pour la première transmission en liaison montante. Ceci peut résoudre des problèmes rencontrés avec l'état de la technique, fournir une indication pertinente d'accès à un canal pour plus d'une transmission en liaison montante planifiée par un même indicateur de commande de liaison descendante (DCI) dans un spectre partagé, réduire la surcharge de signalisation, donner de bonnes performances de communication, et/ou procurer une grande fiabilité.
PCT/IB2021/054744 2020-06-03 2021-05-31 Appareil et procédé de communication sans fil WO2021245526A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180317244A1 (en) * 2016-01-29 2018-11-01 Electronics And Telecommunications Research Institute Method and apparatus for transmitting signal in unlicensed band communication system, method and apparatus for scheduling uplink, and method and apparatus for transmitting information about channel state measurement section

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180317244A1 (en) * 2016-01-29 2018-11-01 Electronics And Telecommunications Research Institute Method and apparatus for transmitting signal in unlicensed band communication system, method and apparatus for scheduling uplink, and method and apparatus for transmitting information about channel state measurement section

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