WO2022213270A1 - Procédé et appareil pour une transmission de liaison montante sur un spectre sans licence - Google Patents

Procédé et appareil pour une transmission de liaison montante sur un spectre sans licence Download PDF

Info

Publication number
WO2022213270A1
WO2022213270A1 PCT/CN2021/085680 CN2021085680W WO2022213270A1 WO 2022213270 A1 WO2022213270 A1 WO 2022213270A1 CN 2021085680 W CN2021085680 W CN 2021085680W WO 2022213270 A1 WO2022213270 A1 WO 2022213270A1
Authority
WO
WIPO (PCT)
Prior art keywords
uplink transmission
control information
beams
relations
downlink
Prior art date
Application number
PCT/CN2021/085680
Other languages
English (en)
Inventor
Yu Zhang
Haipeng Lei
Original Assignee
Lenovo (Beijing) Limited
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 Lenovo (Beijing) Limited filed Critical Lenovo (Beijing) Limited
Priority to PCT/CN2021/085680 priority Critical patent/WO2022213270A1/fr
Publication of WO2022213270A1 publication Critical patent/WO2022213270A1/fr

Links

Images

Classifications

    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection

Definitions

  • Embodiments of the present application generally relate to wireless communication technology, and especially to a method and apparatus for uplink transmission on unlicensed spectrum, e.g., for uplink transmission under 3 rd Generation Partnership Project (3GPP) 5G New Radio (NR) .
  • 3GPP 3 rd Generation Partnership Project
  • NR 5G New Radio
  • channel access procedure e.g., Listen-Before-Talk procedure, LBT procedure
  • LBT procedure may be required to be performed by transmitting device, for example base station (BS) .
  • the LBT procedure is executed by performing energy detection on a certain channel. Only when the LBT procedure generates a success result can the transmitting device initiate transmission (s) on the certain channel, which is known as initiating a channel occupancy (CO) .
  • CO channel occupancy
  • the receiving device for example user equipment (UE) , can also perform transmission (s) on the channel, which is known as sharing the CO.
  • UE user equipment
  • the CO refers to the transmissions on the channel by the transmitting device and the receiving device after completing the LBT procedure. These transmissions can occupy the channel for a duration of time, which is known as the time duration of the CO or a channel occupancy time (COT) and is up to a maximum channel occupancy time (MCOT) .
  • the channel where the transmitting device performs the LBT procedure generating a success result is also known as the frequency location of the CO. Unless the LBT procedure generates a success result, the transmitting device cannot initiate any transmission (s) and will continue performing the LBT procedure until the LBT procedure generates a success result.
  • a directional LBT procedure which is executed by performing energy detection with one or more sensing beams.
  • the transmitting device and the receiving device can determine a spatial region, which is known as the spatial region of the CO initiated by the transmitting device after completing a directional LBT procedure with the one or more sensing beams.
  • a ⁇ transmission beam used by either the transmitting device or the receiving device to perform a transmission on the channel during the time duration of the CO should be within the spatial region of the CO.
  • LBT Cat1 means that no LBT procedure is performed by the transmitting device.
  • LBT Cat2 means that a LBT procedure is performed without random back-off.
  • LBT Cat3 means that a LBT procedure is performed with random back-off with a fixed contention window size.
  • the transmitting device draws a random number N within a contention window, the size of which is specified by a minimum and maximum value of N.
  • the size of the content window is fixed.
  • the random number N is used to determine the duration of time that the channel is sensed to be idle before the transmitting device transmits on the channel.
  • LBT Cat4 means that a LBT procedure is performed with random back-off with a variable contention window size.
  • the transmitting device draws a random number M within a contention window, the size of which is specified by a minimum and maximum value of M.
  • the transmitting device can vary the size of the contention window when drawing the random number M.
  • the random number M is used in the LBT procedure to determine the duration of time that the channel is sensed to be idle before the transmitting device transmits on the channel.
  • the transmitting device can initiate a CO after completing a LBT Cat4 or a LBT Cat3.
  • the receiving device can share the CO after completing a LBT Cat2 or a LBT Cat1.
  • a UE can be scheduled by a BS to perform an uplink (UL) transmission, for example, a Physical Uplink Shared Channel (PUSCH) transmission, by an UL grant.
  • the resource (s) in time domain and frequency domain used to transmit the UL transmission is/are indicated by the UL grant.
  • the UL transmission beam used to transmit the UL transmission is also indicated by the UL grant.
  • a ⁇ UE can also be configured by a BS to perform an UL transmission, for example, a PUSCH transmission, a Physical Uplink Control Channel (PUCCH) transmission, a Physical Random Access Channel (PRACH) transmission or an Sounding Reference Signal (SRS) transmission, by a Higher Layer Signaling (HLS) .
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • SRS Sounding Reference Signal
  • the resource (s) in time domain and frequency domain used to transmit the UL transmission is/are indicated by the HLS.
  • the UL ⁇ transmission beam used to transmit the UL transmission is also indicated by the HLS. Only the UE determines that an uplink transmission is within the time duration and the frequency location of a CO initiated by the BS, the UE can share the CO.
  • a base station may initiate a CO after completing a directional LBT procedure with one or more sensing beams that may result in a situation where a UE determines that an uplink transmission is within the time duration and the frequency location of the CO, but the indicated uplink transmission beam (s) used by the UE to perform the UL transmission may not always be within a spatial region of the CO. Therefore, in order to share the CO, it is necessary for the UE to know the LBT-related information.
  • Embodiments of the present application provide a method and an apparatus for uplink transmission on unlicensed spectrum.
  • One embodiment of the present disclosure provides a method performed by a user equipment (UE) , comprising: receiving a first control information indicating a group of relations among a first set of sensing beams used by a base station (BS) to perform listen before talk (LBT) procedure (s) and a first set of uplink transmission beams; receiving one or more second control information, wherein each second control information is associated with a channel occupancy (CO) initiated by the BS; determining a second set of uplink transmission beams based on the first control information and the one or more second control information, wherein the second set of uplink transmission beams are within a total spatial region of one or more COs; selecting, from the second set of uplink transmission beams, a third uplink transmission beam; and performing an uplink transmission with the third uplink transmission beam.
  • UE user equipment
  • the method further comprising: determining whether the uplink transmission of the UE is within a duration in time domain of a CO, and within a location in frequency domain of the CO.
  • the method further comprising: determining whether the uplink transmission of the UE is within an intersection of durations in time domain of at least two COs, and within an intersection of locations in frequency domain of the at least two COs.
  • the first control information is carried by a higher layer signaling.
  • the group of relations include one or more correspondences between one or more sensing beams and an uplink transmission beam.
  • the first control information further indicates another group of relations among a first set of downlink transmission beams and the first set of uplink transmission beams.
  • the another group of relations include one or more correspondences among one or more downlink transmission beams and an uplink transmission beam.
  • each second control information is received in a group common-physical downlink control channel (GC-PDCCH) .
  • GC-PDCCH group common-physical downlink control channel
  • each second control information includes an indicator indicating one or more relations from the group of relations.
  • each second control information includes an indicator indicating one or more relations from the group of relations and the another group of relations.
  • a ⁇ method performed by a base station comprising: transmitting a first control information indicating a group of relations among a first set of sensing beams used by the BS to perform a listen before talk (LBT) procedure and a first set of uplink transmission beams; transmitting one or more second control information, wherein each second control information is associated with a channel occupancy (CO) initiated by the BS; determining a second uplink transmission beam; and receiving an uplink transmission from the UE with an uplink reception beam corresponding to the second uplink transmission beam.
  • BS base station
  • the first control information further indicates another group of relations among a first set of downlink transmission beams and the first set of uplink transmission beams.
  • One embodiment of the present disclosure provides an apparatus, comprising: a non-transitory computer-readable medium having stored thereon computer-executable instructions; a receiving circuitry; a transmitting circuitry; and a processor coupled to the non-transitory computer-readable medium, the receiving circuitry and the transmitting circuitry, wherein the computer-executable instructions are executable by the processor to cause the apparatus to implement the method performed by a user equipment (UE) , comprising: receiving a first control information indicating a group of relations among a first set of sensing beams used by a base station (BS) to perform listen before talk (LBT) procedure (s) and a first set of uplink transmission beams; receiving one or more second control information, wherein each second control information is associated with a channel occupancy (CO) initiated by the BS; determining a second set of uplink transmission beams based on the first control information and the one or more second control information, wherein the second set of uplink transmission beams are within a total spatial region of one or more COs; selecting
  • Fig. 1 illustrates a schematic diagram of a wireless communication system in accordance with some embodiments of the present disclosure.
  • Figs. 2A-2C illustrate scenarios for performing uplink transmission on unlicensed spectrum in accordance with some embodiments of the present disclosure.
  • Figs. 3A-3C illustrate other scenarios for performing uplink transmission on unlicensed spectrum in accordance with some embodiments of the present disclosure.
  • Fig. 4 illustrates a flow chart for performing uplink transmission on unlicensed spectrum in accordance with some embodiments of the present disclosure.
  • Fig. 5 illustrates a block diagram of an apparatus according to the embodiments of the present disclosure.
  • Fig. 1 illustrates a schematic diagram of a wireless communication system 100 in accordance with some embodiments of the present application.
  • the wireless communication system 100 includes UE (s) 101 and BS (s) 102.
  • the exemplary wireless communication system 100 includes three UEs 101 and three BSs 102 for illustrative purpose only. Even though a specific number of UEs 101 and BSs 102 are depicted in Fig. 1, one skilled in the art will recognize that any number of UEs 101 and BSs 102 may be included in the wireless communication system 100.
  • the UEs 101 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., routers, switches, and modems) , or the like.
  • the UEs 101 may include a portable wireless communication device, a smart phone, a cellular telephone, a flip phone, a device having a subscriber identity module, a personal computer, a selective call receiver, or any other device that is capable of sending and receiving communication signals on a wireless network.
  • the UEs 101 include wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like. Moreover, the UEs 101 may be referred to as a subscriber unit, a mobile phone, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or any device described using other terminology used in the art.
  • the UEs 101 may communicate directly with the BSs 102 via uplink communication signals.
  • the BSs 102 may be distributed over a geographic region.
  • each of the BSs 102 may also be referred to as an access point, an access terminal, a base, a macro cell, a Node-B, an enhanced Node B (eNB) , a gNB, a Home Node-B, a relay node, or any device described using other terminology used in the art.
  • the BSs 102 are generally part of a radio access network that may include one or more controllers communicably coupled to one or more corresponding BSs 102.
  • the wireless communication system 100 is compatible with any type of network that is capable of sending and receiving wireless communication signals.
  • the wireless communication system 100 is compatible with a wireless communication network, a cellular telephone network, a Time Division Multiple Access (TDMA) -based network, a Code Division Multiple Access (CDMA) -based network, an Orthogonal Frequency Division Multiple Access (OFDMA) -based network, an LTE network, a 3rd Generation Partnership Project (3GPP) -based network, a 3GPP 5G network, a satellite communications network, a high altitude platform network, and/or other communications networks.
  • TDMA Time Division Multiple Access
  • CDMA Code Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the wireless communication system 100 is compatible with the 5G NR of the 3GPP protocol, wherein the BSs 102 transmit data using an orthogonal frequency division multiplexing (OFDM) modulation scheme on the downlink and the UEs 101 transmit data on the uplink using Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) or Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) scheme. More generally, however, the wireless communication system 100 may implement some other open or proprietary communication protocols, for example, WiMAX, among other protocols.
  • OFDM orthogonal frequency division multiplexing
  • CP-OFDM Cyclic Prefix-Orthogonal Frequency Division Multiplexing
  • BS (s) 102 may communicate using other communication protocols, such as the IEEE 802.11 family of wireless communication protocols. Further, in some embodiments of the present application, the BS (s) 102 may communicate over licensed spectrums, whereas in other embodiments, the BS (s) 102 may communicate over unlicensed spectrums. The present application is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol. In yet some embodiments of present application, BS (s) 102 may communicate with UE (s) 101 using the 3GPP 5G protocols.
  • omni-directional LBT may cause some issues.
  • LAA License Assisted Access
  • eLAA Enhanced License Assisted Access
  • FeLAA Further Enhanced License Assisted Access
  • NR-U NR-Unlicensed
  • Directional LBT which is executed by performing energy detection with one or more sensing beams, has the merit to improve the probability of successful channel access and enhance the spatial reuse. Therefore, directional LBT is utilized in the present disclosure.
  • the sensing beams may also be referred to as LBT beams.
  • a BS may initiate a CO and then a UE can share the CO after completing a LBT Cat1 or LBT Cat2. If the BS initiates the CO after completing a directional LBT procedure with one or more sensing beams that may result in a situation where the UE determines that an uplink transmission is within a time duration and a frequency location of the CO, but an uplink transmission beam indicated by an UL grant or a HLS for the UE performing the UL transmission may not always be within a spatial region of the CO. Therefore, in some cases, the UE lacks the information on whether the uplink transmission beam indicated by the uplink grant or HLS is within the spatial region of the CO initiated by the BS, and thus cannot determine whether the CO can be shared.
  • the present disclosure proposes some solutions for a UE to access the channel.
  • Figs. 2A-2C illustrate scenarios for performing uplink transmission on unlicensed spectrum in accordance with some embodiments of the present disclosure.
  • a BS may perform a LBT procedure with one or more downlink sensing beams, such as the downlink (DL) sensing beam 1, the downlink sensing beam 2, the downlink sensing beam 3, etc.
  • the UE may perform an uplink transmission with the uplink (UL) transmission (Tx) beam 1, uplink transmission beam 2, uplink transmission beam 3, etc.
  • Figs. 2A-2C only show downlink sensing beam 1, the downlink sensing beam 2, the downlink sensing beam 3, the uplink transmission beam 1, the uplink transmission beam 2, the uplink transmission beam 3, it should be noted that other downlink sensing beams and other uplink transmission beams may also be included.
  • the UE is scheduled or configured by the BS to transmit an uplink transmission in slot C using an uplink transmission beam A ⁇ by an UL grant or a first HLS.
  • the uplink transmission beam A ⁇ may be one of the uplink transmission beam 1, the uplink transmission beam 2, the uplink transmission beam 3, or other uplink transmission beams not shown in Figs. 2A-2C.
  • the UE receives a group common physical downlink control channel (GC-PDCCH) .
  • a DCI which is carried by the GC-PDCCH and indicates the information of a corresponding CO
  • the UE determines that the CO has been initiated by the BS. Furthermore, according to the DCI, the UE can determine the time duration and the frequency location of the CO.
  • the UE can perform the uplink transmission using the determined uplink transmission beam B, that is, share the CO using the determined uplink transmission beam B, after completing a LBT Cat2 or without a LBT procedure (i.e. the LBT Cat1) .
  • the present disclosure proposes several solutions for indicating a group of relations among a set of downlink sensing beams used by the BS to perform LBT procedure (s) , e.g., the downlink sensing beam 1, the downlink sensing beam 2, and the downlink sensing beam 3 shown in Figs. 2A-2C and a set of uplink transmission beams, e.g., the uplink transmission beam 1, the uplink transmission beam 2, the uplink transmission beam 3 shown in Figs. 2A-2C.
  • LBT procedure e.g., the downlink sensing beam 1, the downlink sensing beam 2, and the downlink sensing beam 3 shown in Figs. 2A-2C
  • uplink transmission beams e.g., the uplink transmission beam 1, the uplink transmission beam 2, the uplink transmission beam 3 shown in Figs. 2A-2C.
  • the group of relations between the set of downlink sensing beams and the set of uplink transmission beams may be included in a table carried by a second HLS , more specifically, each row of the table may include three columns, which respectively indicate : 1) a row index, 2) a downlink sensing beam included in the set of the downlink sensing beams, and 3) an uplink transmission beam included in the set of uplink transmission beams.
  • the UE may determine that the uplink transmission beam is within the spatial region of the CO initiated by the BS after completing a LBT procedure with one or more downlink sensing beams including the downlink sensing beam.
  • table 1-1 can be transmitted to the UE carried by a second HLS as follows, and the relations among the set of downlink sensing beams and the set of uplink transmission beams are shown in the Fig. 2A.
  • the first row with a row index "0" suggests that the downlink sensing beam 1 corresponds to the uplink transmission beam 1
  • the second row with a row index "1" suggests that the downlink sensing beam 2 corresponds to the uplink transmission beam 2.
  • the UE may determine that the uplink transmission beam 1 is within a spatial region of the CO. If the BS initiates a CO after completing a LBT procedure with one or more downlink sensing beams including the downlink sensing beam 2, the UE may determine that the uplink transmission beam 2 is within a spatial region of the CO.
  • the DCI carried by the GC-PDCCH may include an indicator, which indicates one or more row indexes of the table. For example, if the indicator indicates a row index "0" , then the UE determines that the BS initiates the CO after completing a LBT procedure with the downlink sensing beam 1, and further determines the uplink transmission beam 1 is within the spatial region of the CO.
  • the UE can determine the one or more downlink sensing beams used by the BS to perform the LBT procedure for initiating the CO, and whether there is an uplink transmission beam within the spatial region of the CO.
  • null there may not be an uplink transmission beam corresponding to a downlink sensing beam, in this case, "Null” may be indicated in a column of a row, of which a column indicates the downlink sensing beam. Although “Null” is used in this case, it should be noted that other symbols may also be used to indicate that no uplink transmission beam corresponds to a downlink sensing beam.
  • UE which can only use the transmission beam 3 for uplink transmission.
  • table 1-2 for this UE is presented as follows:
  • the UE can determine that there is no uplink transmission beam corresponds to the downlink transmission beam 1 and the downlink transmission beam 2.
  • the UE may determine more than one uplink transmission beams within the spatial region of the CO, then the UE will select one of them for performing the uplink transmission, for example, the uplink transmission beam indicated in the row with the smallest row index.
  • the selection is preconfigured, such that the UE and the BS would select the uplink transmission beam and the uplink reception beam which corresponds to each other.
  • the BS initiates the CO (which has a spatial region within the dashed lines) after completing a LBT procedure with the downlink sensing beam 1 and the downlink sensing beam 2, according to table 1-3, the row index "0" and the row index "1" will be indicated to the UE by the DCI carried by the GC-PDCCH, the UE may determine that the uplink transmission beam 1 and uplink transmission beam 2 are within the spatial region of the CO. The UE will select one of the determined uplink transmission beams for performing the uplink transmission, for example, the uplink transmission beam 1 indicated in the row with the row index "0" .
  • a downlink sensing beam may also correspond to one or more uplink transmission beams.
  • the downlink sensing beam 3 corresponds to the uplink transmission beam 1, 2, and 3.
  • the UE may receive more than one GC-PDCCHs, and the solution for this scenario is described as follows:
  • a UE In slot A, a UE is scheduled or configured by a BS to transmit an uplink transmission in slot C using the uplink transmission beam A ⁇ by an UL grant or a first HLS.
  • the UE receives a first GC-PDCCH.
  • a first DCI which is carried by the first GC-PDCCH and indicates the information of a corresponding CO
  • the UE determines that the first CO, CO 1 , has been initiated by the BS.
  • the UE can determine the time duration and the frequency location of CO 1 .
  • a spatial region of CO 1 is shown within the dashed lines, and a downlink sensing beam 1 is used by the BS to perform a LBT procedure for initiating the CO 1 .
  • the UE receives a second GC-PDCCH.
  • a second DCI which is carried by the second GC-PDCCH and indicates the information of another corresponding CO
  • the UE determines that the second CO, CO 2 , has been initiated by the BS.
  • the UE can determine the time duration and the frequency location of CO 2 .
  • the spatial region of CO 2 is shown within the dashed lines, and the downlink sensing beam 2 is used by the BS to perform a LBT procedure for initiating the CO 2 .
  • the UE receives a n th GC-PDCCH.
  • a n th DCI which is carried by the n th GC-PDCCH and indicates the information of a corresponding CO
  • the UE determines that the n th CO, CO n , has been initiated by the BS.
  • the UE can determine the duration in time domain and the frequency location of CO n .
  • the UE is aware that the BS initiates at least n COs, if the UE determines that: 1) the uplink transmission is within an intersection of determined time durations and an intersection of frequency locations of the n COs and, 2) there is an uplink transmission beam B within a total spatial region of the n COs, in slot C, the UE can perform the uplink transmission, that is, share the CO, using the determined uplink transmission beam B after completing a LBT Cat2 or without a LBT procedure, i.e. LBT Cat1.
  • the uplink transmission beam is determined based on a table included in a second HLS, which indicates a group of relations between a set of downlink sensing beams used by the BS to perform LBT procedure (s) , e.g. the downlink sensing beam 1 and the downlink sensing beam 2 as shown in Figs. 3A-3C, and a set of uplink transmission beams, e.g., the uplink transmission beam 3 as shown in Figs. 3A-3C.
  • LBT procedure e.g. the downlink sensing beam 1 and the downlink sensing beam 2 as shown in Figs. 3A-3C
  • a set of uplink transmission beams e.g., the uplink transmission beam 3 as shown in Figs. 3A-3C.
  • each row of the table have three columns, the first column indicates a row index, the second column indicates one or more downlink sensing beams, and the third column indicates an uplink transmission beam, suggesting that the one or more downlink sensing beam correspond to the uplink transmission beam.
  • the UE can determine that the uplink transmission beam is within a spatial region of a CO initiated by the BS after completing a LBT procedure with the one or more downlink sensing beams.
  • the UE can further determine that the uplink transmission beam is within a total spatial region of the multiple COs, each of which is initiated by the BS after completing a LBT procedure with a downlink sensing beam included in the one or more downlink sensing beams.
  • the UE determines that the uplink transmission beam 3 is within the total spatial region of the CO 1 and CO 2 because the row with row index "0" indicating that the downlink sensing beam 1 and downlink sensing beam 2 correspond to uplink transmission beam 3.
  • each row of the table may further include a column indicating one or more downlink transmission beams, so that the table further indicates another group of relations between a set of downlink transmission beams and a set of uplink transmission beams.
  • table 2-2 is presented as follows:
  • each row of the table has four columns.
  • table 2-2 has an additional column which indicates one or more downlink transmission beams, suggesting that the one or more downlink transmission beams correspond to the uplink transmission beam.
  • the UE can determine that the uplink transmission beam is within a spatial region of a CO initiated by the BS after completing a LBT procedure with one or more downlink sensing beam corresponding to the one or more downlink transmission beams.
  • the UE can further determine that the uplink transmission beam is within a total spatial region of multiple COs, each of which is initiated by the BS after completing a LBT procedure with a downlink sensing beam corresponding to a downlink transmission beam included in the one or more downlink sensing beams.
  • the UE determines that the uplink transmission beam 3 is within the total spatial region of the CO 1 and CO 2 , because downlink sensing beam 1 corresponds to downlink transmission beam 1, downlink sensing beam 2 corresponds to downlink transmission beam 2, and the row with row index "0" indicates that the downlink beam 1 and the downlink beam 2 correspond to uplink transmission beam 3.
  • the symbol "Null” suggests that there is no other available uplink transmission beam corresponding to the downlink sensing beams or the one or more downlink transmission beams.
  • the correspondence between a downlink sensing beam and a downlink transmission beam may be that the downlink sensing beam and the downlink transmission beam are indicated by the same Transmission Configuration Indicator (TCI) state.
  • TCI Transmission Configuration Indicator
  • the correspondence between a downlink sensing beam and a downlink transmission beam may also be that the downlink sensing beam and the downlink transmission beam have the same Quasi Co-Location (QCL) information.
  • QCL Quasi Co-Location
  • Figs. 3A-3C illustrate other scenarios for performing uplink transmission on unlicensed spectrum in accordance with some embodiments of the present disclosure.
  • Figs. 3A-3C describe a scenario of the UE receiving two GC-PDCCHs, each includes a DCI corresponding to a CO. The details are as described follows:
  • the UE receives a first GC-PDCCH, which includes a first DCI indicating that a first CO, CO 1 , has been initiated by the BS. Furthermore, according to the first DCI, the UE can determine a time duration and a frequency location of the CO 1 . A ⁇ spatial region of CO 1 is shown within the dashed lines, and the downlink sensing beam 1 is used by the BS to perform a LBT procedure for initiating the CO 1 .
  • the UE further receives a second GC-PDCCH, which includes a second DCI indicating that a second CO, CO 2 , has been initiated by the BS. Furthermore, according to the second DCI, the UE can determine a time duration and a frequency location of CO 2 .
  • the spatial region of CO 2 is shown within the dashed lines, and the downlink sensing beam 2 is used by the BS to perform a LBT procedure for initiating the CO 2 .
  • the UE determines that the uplink transmission of the UE is within an intersection of determined time durations and an intersection of determined frequency locations of CO 1 and CO 2 .
  • the UE determines that the uplink transmission beam 3 is within the total spatial region of the CO 1 and CO 2 .
  • Fig. 4 illustrates a method performed by the UE and the BS for wireless communication according to a preferred embodiment of the present disclosure.
  • the BS transmits a first control information indicating a group of relations among a first set of sensing beams used by the BS to perform LBT procedure (s) and a first set of uplink transmission beams; correspondingly, at UE side, the UE receives the first control information.
  • the first control information may be included in a first HLS.
  • the first control information may be a table, such as table 1-1, 1-2, etc.
  • the group of relations in the table may include one or more correspondences between one or more sensing beams and an uplink transmission beam.
  • the first row with the row index "0" includes the correspondence between one or more downlink sensing beams (that is, DL sensing beam 1, and DL sensing beam 2) and the uplink transmission beam, UL Tx beam 3.
  • the first control information may further indicate another group of relations among a first set of downlink transmission beams and the first set of uplink transmission beams.
  • the another group of relations may include one or more correspondences among one or more downlink transmission beams and an uplink transmission beam.
  • the first row with the row index "0" includes the correspondence between one or more downlink transmission beams (that is, DL transmission beam 1 and DL ⁇ transmission beam 2) and an uplink transmission beam, the UL Tx beam 3.
  • the BS transmits one or more second control information, for example, one or more DCIs, each of which is carried by a GC-PDCCH, and each second control information is associated with a CO initiated by the BS.
  • the UE receives the one or more second control information in operation 402.
  • each second control information may include an indicator indicating one or more relations from the group of relations.
  • each second control information may include an indicator indicating one or more relations from the group of relations and the another group of relations.
  • the DCI may include an indicator, which indicates one or more row indexes in one of the tables of the present disclosure.
  • the UE determines a second set of uplink transmission beams based on the first control information and the one or more second control information, wherein the second set of uplink transmission beams are within a total spatial region of the one or more COs.
  • the UE selects, from the second set of uplink transmission beams, a third uplink transmission beam; and in operation 405, the UE perform an uplink transmission with the third uplink transmission beam.
  • the BS receives the uplink transmission with an uplink reception beam corresponding to the third uplink transmission beam.
  • the UE determines whether the uplink transmission is within a time duration of a CO, and within a frequency location of the CO. If the UE determines that the uplink transmission is within the time duration of the CO, and within the frequency location of the CO, the UE can share the CO, thus greatly improves the data transmission efficiency.
  • the UE determines whether the uplink transmission is within an intersection of time durations of at least two COs, and within an intersection of frequency locations of the at least two COs. If the uplink transmission of the UE is within an intersection of time durations of at least two COs, and within an intersection of frequency locations of the at least two COs, the UE can share the at least two COs, thus also greatly improves the data transmission efficiency.
  • Fig. 5 illustrates a block diagram of an apparatus 500 according to the embodiments of the present disclosure.
  • the apparatus 500 may include a receiving circuitry, a processor, a medium and a transmitting circuitry.
  • the apparatus 500 may include a non-transitory computer-readable medium 503 having stored thereon computer-executable instructions; a receiving circuitry 501; a transmitting circuitry 504; and a processor 502 coupled to the non-transitory computer-readable medium 503, the receiving circuitry 501 and the transmitting circuitry 504.
  • the computer executable instructions can be programmed to implement a method (e.g. the method in Fig. 4) with the receiving circuitry 501, the transmitting circuitry 504 and the processor 502.
  • controllers, flowcharts, and modules may also be implemented on a general purpose or special purpose computer, a programmed microprocessor or microcontroller and peripheral integrated circuit elements, an integrated circuit, a hardware electronic or logic circuit such as a discrete element circuit, a programmable logic device, or the like.
  • any device that has a finite state machine capable of implementing the flowcharts shown in the figures may be used to implement the processing functions of the present disclosure.

Landscapes

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

Abstract

La présente demande concerne un procédé et un appareil pour une transmission de liaison montante sur un spectre sans licence. Un mode de réalisation de la présente divulgation concerne un procédé mis en œuvre par un équipement utilisateur (UE), comprenant les étapes suivantes : réception de premières informations de commande indiquant un groupe de relations parmi un premier ensemble de faisceaux de détection utilisé par une station de base (BS) pour effectuer une procédure « écouter avant de parler » (LBT) et un premier ensemble de faisceaux de transmission de liaison montante; réception d'une ou de plusieurs secondes informations de commande, chaque seconde information de commande étant associée à une occupation de canal (CO) initiée par la BS; détermination d'un second ensemble de faisceaux de transmission de liaison montante sur la base du groupe de relations et de la ou des secondes informations de commande, le second ensemble de faisceaux de transmission de liaison montante se situant dans une région spatiale totale d'une ou de plusieurs CO; sélection, à partir du second ensemble de faisceaux de transmission de liaison montante, d'un troisième faisceau de transmission de liaison montante; et réalisation d'une transmission de liaison montante avec le troisième faisceau de transmission de liaison montante.
PCT/CN2021/085680 2021-04-06 2021-04-06 Procédé et appareil pour une transmission de liaison montante sur un spectre sans licence WO2022213270A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/085680 WO2022213270A1 (fr) 2021-04-06 2021-04-06 Procédé et appareil pour une transmission de liaison montante sur un spectre sans licence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/085680 WO2022213270A1 (fr) 2021-04-06 2021-04-06 Procédé et appareil pour une transmission de liaison montante sur un spectre sans licence

Publications (1)

Publication Number Publication Date
WO2022213270A1 true WO2022213270A1 (fr) 2022-10-13

Family

ID=83545910

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/085680 WO2022213270A1 (fr) 2021-04-06 2021-04-06 Procédé et appareil pour une transmission de liaison montante sur un spectre sans licence

Country Status (1)

Country Link
WO (1) WO2022213270A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200296635A1 (en) * 2019-03-14 2020-09-17 Ofinno, Llc Handover in Unlicensed Band
US20200322982A1 (en) * 2019-01-18 2020-10-08 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method and device for wireless communication on an unlicensed spectrum
CN112399441A (zh) * 2019-08-16 2021-02-23 华为技术有限公司 无线链路监测方法及相关装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200322982A1 (en) * 2019-01-18 2020-10-08 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method and device for wireless communication on an unlicensed spectrum
US20200296635A1 (en) * 2019-03-14 2020-09-17 Ofinno, Llc Handover in Unlicensed Band
CN112399441A (zh) * 2019-08-16 2021-02-23 华为技术有限公司 无线链路监测方法及相关装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CATT: "Channel Access Mechanism in support", 3GPP DRAFT; R1-2007848, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20201026 - 20201113, 17 October 2020 (2020-10-17), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051939937 *

Similar Documents

Publication Publication Date Title
CN111586881B (zh) 随机接入的方法和装置
EP3735053B1 (fr) Procédé d'émission de signal, dispositif terminal et dispositif réseau
CN110460411B (zh) Pbch重复发送、接收方法及装置、存储介质、基站、用户设备
WO2022213270A1 (fr) Procédé et appareil pour une transmission de liaison montante sur un spectre sans licence
US11212839B2 (en) Method for random access and terminal device
WO2022017491A1 (fr) Procédé et appareil de traitement de mesure de canal, et dispositif
WO2021163961A1 (fr) Procédé et appareil de sauts de fréquence multi-faisceaux
US20230328785A1 (en) Method and apparatus for channel access
TWI723245B (zh) 處理隨機存取程序的方法及裝置
WO2021189432A1 (fr) Procédé et appareil d'accès à un canal
US20230397250A1 (en) Method and apparatus for multiple uplink transmissions
WO2023115575A1 (fr) Procédés et appareils pour une procédure d'accès aléatoire en mode duplex intégral
WO2023000129A1 (fr) Procédés et appareils de transmission de canal physique de contrôle montant
WO2023159354A1 (fr) Procédé et appareil de détermination de ressources
WO2023205995A1 (fr) Procédés et appareils de transmission pusch non basée sur livre de codes
WO2022000125A1 (fr) Procédé et appareil de mappage de répétitions pusch
WO2023123219A1 (fr) Procédés et appareils pour des améliorations de saut de fréquence pour duplex intégral
WO2023010331A1 (fr) Procédés et appareils de procédure d'accès aléatoire
WO2022067706A1 (fr) Procédé et appareil de reprise après défaillance de faisceau dans des dci multiples basées sur de multiples trp
WO2024087587A1 (fr) Procédés et appareils de calcul et de rapport de csi pour une transmission conjointe cohérente
US20230047505A1 (en) Method and apparatus for downlink data reception
WO2022236699A1 (fr) Procédés et appareils pour la transmission de bfr
WO2024073985A1 (fr) Procédés et appareils de réduction de latence de transmission prach
WO2024073985A9 (fr) Procédés et appareils de réduction de latence de transmission prach
WO2022032637A1 (fr) Procédés et appareils pour une procédure de partage de groupe entre des ue de liaison latérale rn

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21935506

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 14/02/2024)