WO2024074021A1 - Procédés et appareils de transmission conjointe cohérente - Google Patents

Procédés et appareils de transmission conjointe cohérente Download PDF

Info

Publication number
WO2024074021A1
WO2024074021A1 PCT/CN2023/085985 CN2023085985W WO2024074021A1 WO 2024074021 A1 WO2024074021 A1 WO 2024074021A1 CN 2023085985 W CN2023085985 W CN 2023085985W WO 2024074021 A1 WO2024074021 A1 WO 2024074021A1
Authority
WO
WIPO (PCT)
Prior art keywords
trp
cpus
trps
cpu
selection
Prior art date
Application number
PCT/CN2023/085985
Other languages
English (en)
Inventor
Yi Zhang
Chenxi Zhu
Wei Ling
Bingchao LIU
Lingling Xiao
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/CN2023/085985 priority Critical patent/WO2024074021A1/fr
Publication of WO2024074021A1 publication Critical patent/WO2024074021A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • 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

Definitions

  • the present disclosure relates to wireless communications, and particularly relates to methods and apparatuses for coherent joint transmission (CJT) .
  • CJT coherent joint transmission
  • MIMO multiple inputs multiple outputs
  • 3GPP 3 rd generation partnership project
  • CJT coherent joint transmission
  • FDD frequency division duplex
  • TDD time division duplex
  • TRP transmission or reception points
  • CSI processing for CJT may be more complicated than that for non-CJT (NCJT) . Therefore, it is advantageous to provide solutions for reporting CSI processing unit (CPU) number and CSI updating in CJT scenarios.
  • CPU CSI processing unit
  • the UE may include: a transceiver that reports UE capability information indicating one or multiple numbers of CPUs for CJT; and a processor that is coupled with the transceiver and performs CSI updating by using unoccupied CPU (s) .
  • each of the one or multiple numbers of CPUs corresponds to a respective number of TRPs.
  • a number of CPUs within the one or multiple numbers of CPUs which corresponds to N TRP TRPs is equal to: N TRP or N TRP plus an additional number of CPUs.
  • the additional number is one or two.
  • the one or multiple numbers of CPUs include: a first number of CPUs which corresponds to 2 TRPs and is selected from a group including 2, 3, and 4; a second number of CPUs which corresponds to 3 TRPs and is selected from a group including 3, 4, and 5; or a third number of CPUs which corresponds to 4 TRPs and is selected from a group including 4, 5, and 6.
  • each of the one or multiple numbers of CPUs corresponds to a respective number of TRPs and/or is related with a number of TRP selections from the respective number of TRPs.
  • a number of CPUs within the one or multiple numbers of CPUs which corresponds to N TRP TRPs is equal to: N TRP ; N TRP plus an additional number of CPUs; a sum of a first set of CPU numbers for TRP selection, each CPU number for TRP selection within the first set corresponding to a TRP selection consisting of a respective number of TRPs selected from N TRP TRPs; or a sum of a second set of CPU numbers for TRP selection, each CPU number for TRP selection within the second set corresponding to all TRP selections consisting of a respective number of TRPs from the N TRP TRPs.
  • the one or multiple numbers of CPUs include: a first number of CPUs which corresponds to 2 TRPs and is selected from a group including 2, 3, 4, and 5; a second number of CPUs which corresponds to 3 TRPs and is selected from a group including 3, 4, 5, 6, and 12; or a third number of CPUs which corresponds to 4 TRPs and is selected from a group including 4, 5, 6, 10, and 32.
  • each of the one or multiple numbers of CPUs corresponds to a respective number of TRPs and/or a respective number of beam number combinations.
  • the third additional number is twice the second additional number, or the second multiple is twice the first multiple.
  • the one or multiple numbers of CPUs include: a first number of CPUs which corresponds to 2 TRPs and 2 beam number combinations and is selected from a group including 3 and 4; a second number of CPUs which corresponds to 2 TRPs and 4 beam number combinations and is selected from a group including 3, 4, and 8; a third number of CPUs which corresponds to 3 TRPs and 2 beam number combinations and is selected from a group including 4 and 6; a fourth number of CPUs which corresponds to 3 TRPs and 4 beam number combinations and is selected from a group including 4, 5, and 12; a fifth number of CPUs which corresponds to 4 TRPs and 2 beam number combinations and is selected from a group including 5 and 8; or a sixth number of CPUs which corresponds to 4 TRPs and 4 beam number combinations and is selected from a group including 5, 6, and 16.
  • each of the one or multiple numbers of CPUs corresponds to a respective number of TRPs and a respective number of beam number combinations and/or is related with a number of TRP selections from the respective number of TRPs.
  • the third additional number is twice the second additional number, or the second multiple is twice the first multiple.
  • the one or multiple numbers of CPUs include: a first number of CPUs which corresponds to 3 TRPs and 2 beam number combinations and is selected from a group including 4, 6, 7, 12, 13, and 24; a second number of CPUs which corresponds to 3 TRPs and 4 beam number combinations and is selected from a group including 4, 5, 6, 7, 8, 12, 13, and 24; a third number of CPUs which corresponds to 4 TRPs and 2 beam number combinations and is selected from a group including 5, 8, 11, and 20; or a fourth number of CPUs which corresponds to 4 TRPs and 4 beam number combinations and is selected from a group including 5, 6, 11, 12, and 16.
  • a maximum number of CPUs across TRPs per carrier is 8, 16, or 32; or a maximum number of CPUs across TRPs across carriers is 32, 64, or 128.
  • the processor in response to determining that a number of the unoccupied CPU (s) is no smaller than a CPU number required for updating CSI corresponding to at least one of (1) part but not all of candidate TRP selections or (2) part but not all of candidate beam number combinations, performs CSI updating based on at least one of (1) a TRP selection selected from the part of candidate TRP selections or (2) a beam number combination selected from the part of candidate beam number combinations.
  • the processor in response to determining that a number of the unoccupied CPU (s) is no smaller than a CPU number required for updating CSI corresponding to at least one of (1) a default TRP selection but not all of candidate TRP selections or (2) a default beam number combination but not all of candidate beam number combinations, performs CSI updating based on at least one of the default TRP selection or the default beam number combination.
  • the default TRP selection includes: all configured TRPs for TRP selection; or a number of TRPs with larger reference signal received power (RSRP) values than others among all the TRPs.
  • RSRP reference signal received power
  • the default beam number combination has a lowest index among the candidate beam number combinations.
  • each of the one or multiple numbers of CPUs corresponds to at least one of a respective TRP selection or a respective beam number combination
  • the processor performs CSI updating according to a priority of each CSI report which is determined based at least in part on at least one of: an index of a TRP selection corresponding to the CSI report; a total number of candidate TRP selections; an index of a beam number combination corresponding to the CSI report; or a total number of candidate beam number combinations.
  • the BS may include: a transceiver that receives, from a UE, UE capability information indicating one or multiple numbers of CPUs for CJT, and receives at least one CSI report from the UE; and a processor that is coupled with the transceiver.
  • Yet another embodiment of the present disclosure provides a method performed by a UE.
  • the method may include: reporting UE capability information indicating one or multiple numbers of CPUs for CJT; and performing CSI updating by using unoccupied CPU (s) .
  • Still another embodiment of the present disclosure provides a method performed by a BS.
  • the method may include: receiving, from a UE, UE capability information indicating one or multiple numbers of CPUs for CJT; and receiving at least one CSI report from the UE.
  • Fig. 1 illustrates a schematic diagram of an exemplary wireless communication system according to some embodiments of the present disclosure.
  • Fig. 2 illustrates a flowchart of an exemplary method for CJT according to some embodiments of the present disclosure.
  • Fig. 3 illustrates a flowchart of an exemplary method for CJT according to some other embodiments of the present disclosure.
  • Fig. 4 illustrates a simplified block diagram of an exemplary apparatus for CJT according to some embodiments of the present disclosure.
  • Fig. 1 is a schematic diagram illustrating an exemplary wireless communication system 100 according to some embodiments of the present application.
  • the wireless communication system 100 may include a BS 101, a number of TRPs (e.g., TRP 103-1, TRP 103-2, ..., TRP 103-N) , and a UE 105. Although only one BS 101, three TRPs and one UE 105 are shown for simplicity, it should be contemplated that the wireless communication system 100 may include any number of BS, TRPs or UEs in accordance with some other embodiments of the present application.
  • TRPs e.g., TRP 103-1, TRP 103-2, ..., TRP 103-N
  • 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 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 BS 101 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 a device, or described using other terminology used in the art.
  • the BS 101 is generally part of a radio access network that may include a controller communicably coupled to the BS 101.
  • the TRPs can communicate with the BS 101 via, for example, a backhaul link.
  • Each of the TRPs can serve one or more UEs.
  • the TRP 103-1 can serve some mobile stations (which include the UE 105) within a serving area or region (e.g., a cell or a cell sector)
  • the TRP 103-2 can serve some mobile stations (which include the UE 105) within a serving area or region (e.g., a cell or a cell sector)
  • the TRP 103-N can serve some mobile stations (which include the UE 105) within a serving area or region (e.g., a cell or a cell sector) .
  • the TRP 103-1, the TRP 103-2, and the TRP 103-N may serve different UEs.
  • the TRPs can communicate with each other via, for example, a backhaul link (not shown in Fig. 1) .
  • the UE 105 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 UE 105 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 UE 105 may include wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like. Moreover, the UE 105 may be referred to as a subscriber unit, a mobile, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or a device, or described using other terminology used in the art.
  • the TRPs may perform CJT with the UE 105. All the TRPs involved in the CJT may have the same antenna configuration but are at different locations. In the CJT, each TRP may transmit the same data to the UE 105. Each TRP may be configured and transmit with a CSI reference signal (CSI-RS) resource for channel measurement with the same number of antenna ports. In other words, one TRP may correspond to one CSI-RS resource. Therefore, in the present disclosure, the expressions “per TRP” and “per CSI-RS resource” may be used interchangeable, the expressions "across TRPs" and “across CSI-RS resources” may be used interchangeable, or the like.
  • CSI-RS CSI reference signal
  • the maximum number of CSI-RS ports per CSI-RS resource may be 32.
  • the TRP number configured for CJT may be 2, 3, and 4, the maximum number of CSI-RS ports across CSI-RS resources may be 128.
  • RRC radio link control
  • the selection of N CSI-RS resources from N TRP candidate CSI-RS resources can be performed by a UE for CJT. That is, the UE may support TRP selection and indicate the selected TRP (s) (or TRP selection) in a CSI report.
  • the selection of a beam number combination from N L (N L >1) configured combinations can be performed by a UE for CJT. That is, the UE may support beam number combination selection and indicate the selected beam number combination in a CSI report.
  • the present disclosure provides solutions for reporting CPU number (s) for CJT in the case of different UE processing capabilities. Furthermore, the present disclosure provides methods for enhanced CSI updating with finer granularity of occupied CPUs for CJT based on transmission assumption including selected TRPs and/or selected beam number combination.
  • the UE may report capability information on CPU number (s) based on different numbers of TRPs and/or different numbers of beam number combinations configured for CJT so as for the BS to better configure the UE, and may update CJT CSI report based on finer granularity corresponding candidate (s) of TRP selection and/or beam number combination selection on unoccupied CPUs so as to better use the resources.
  • Fig. 2 illustrates a flowchart of an exemplary method 200 for CJT according to some embodiments of the present disclosure.
  • the method 200 may be performed by a UE or other device with similar functions.
  • the UE may report (e.g., to a BS) UE capability information indicating one or multiple numbers of CPUs for CJT.
  • the UE may perform CSI updating by using unoccupied CPU (s) .
  • the UE may transmit at least one CSI report to the BS based on the CSI updating.
  • a maximum number of CPUs for CJT supported by the UE may be defined. In single TRP or NCJT scenarios, the maximum number of CPUs may be 8 per carrier and 32 across carriers. For CJT, the maximum number of CPUs supported by the UE may be increased on account of multiple TRPs (e.g., 2 or 4 TRPs) . For example, a maximum number of CPUs across TRPs per carrier may be 8, 16, or 32; or a maximum number of CPUs across TRPs across carriers may be 32, 64, or 128.
  • each of the one or multiple numbers of CPUs indicated in the UE capability information reported in operation 210 may correspond to a respective number of TRPs.
  • the one or multiple numbers of CPUs for CJT may be increased (e.g., linearly increased) with the configured TRP number (denoted as N TRP ) .
  • N TRP configured for CJT may be 2, 3, or 4.
  • the UE may report 3 numbers of CPUs for CJT corresponding to 2 TRPs, 3 TRPs, and 4 TRPs, respectively.
  • the UE may report only one or two of these 3 numbers of CPUs for CJT based on one or two UE processing capabilities irrespective to actual TRP number for CJT transmission.
  • a number of CPUs corresponding to N TRP TRPs within the one or multiple numbers indicated in the UE capability information reported in operation 210 may be equal to N TRP . That is, one CPU is required for CSI processing for one TRP. This may apply to a UE with a high hardware processing capability.
  • the CPU number required for CSI processing may be increased.
  • the number of CPUs corresponding to N TRP TRPs within the one or multiple numbers indicated in the UE capability information reported in operation 210 may be equal to N TRP plus an additional number of CPUs.
  • the additional number may be 1 or 2.
  • the corresponding number of CPUs for CJT may be 2 (for high hardware processing capability) , or 3 (for medium hardware processing capability) , or 4 (for low hardware processing capability) ;
  • the corresponding number of CPUs for CJT may be 3 (for high hardware processing capability) , or 4 (for medium hardware processing capability) , or 5 (for low hardware processing capability) ;
  • the corresponding number of CPUs for CJT may be 4 (for high hardware processing capability) , or 5 (for medium hardware processing capability) , or 6 (for low hardware processing capability) .
  • the UE may support TRP selection but not support beam number combination selection.
  • the UE may select N CSI-RS resources from N TRP CSI-RS resources configured by the BS (i.e., select N TRPs from N TRP TRPs) and report the TRP selection as a part of a CSI report.
  • each of the one or multiple numbers of CPUs indicated in the UE capability information reported in operation 210 may correspond to a respective number of TRPs.
  • each of the one or multiple numbers of CPUs may be related with a number of TRP selections from the respective number of TRPs. The number of TRP selections may depend on a TRP selection scheme used by the UE.
  • N TRP configured for CJT may be 2, 3, or 4.
  • the UE may report 3 numbers of CPUs for CJT corresponding to 2 TRPs, 3 TRPs, and 4 TRPs, respectively.
  • the UE may report only one or two of these 3 numbers of CPUs for CJT based on one or two UE processing capabilities irrespective to actual TRP number for CJT transmission.
  • the UE may select N TRPs for CJT from N TRP TRPs based on RSRPs of the N TRP TRPs. For example, the UE may select N TRPs with highest RSRPs among the N TRP TRPs. According to the first TRP selection scheme, the UE may not need any additional CPU for TRP selection, and thus the designs for CPU number reporting described in case 1 may also apply here. For example, a number of CPUs corresponding to N TRP TRPs within the one or multiple numbers indicated in the UE capability information reported in operation 210 may be equal to N TRP (for high hardware processing capability) or N TRP plus an additional number of CPUs (for medium or low hardware processing capability) . In some embodiments, the additional number may be 1 or 2.
  • N TRPs i.e., a candidate TRP selection consisting of N TRPs
  • the UE may perform selection among N TRP candidate TRP selections.
  • the corresponding number of CPUs may be equal to a sum of a first set of CPU numbers for TRP selection, wherein each CPU number for TRP selection within the first set may correspond to a TRP selection consisting of a respective number of TRPs selected from N TRP TRPs.
  • the corresponding number of CPUs may be equal to a sum of a first CPU number for TRP selection corresponding to a TRP selection consisting of one TRP and a second CPU number for TRP selection corresponding to a TRP selection consisting of 2 TRPs.
  • the first CPU number is 1
  • the second CPU number is 2
  • the corresponding number of CPUs may be equal to a sum of a first CPU number for TRP selection corresponding to a TRP selection consisting of one TRP, a second CPU number for TRP selection corresponding to a TRP selection consisting of 2 TRPs, and a third CPU number for TRP selection corresponding to a TRP selection consisting of 3 TRPs.
  • the corresponding number of CPUs may be equal to a sum of a first CPU number for TRP selection corresponding to a TRP selection consisting of one TRP, a second CPU number for TRP selection corresponding to a TRP selection consisting of 2 TRPs, a third CPU number for TRP selection corresponding to a TRP selection consisting of 3 TRPs, and a fourth CPU number for TRP selection corresponding to a TRP selection consisting of 4 TRPs.
  • first, second, third, and fourth CPU numbers may have other values in other examples.
  • TRP selection is made based on RSRP. It is contemplated that similar selection schemes based on other parameters may be applied.
  • the UE may select TRP (s) by considering all possible TRP selections.
  • the corresponding number of CPUs may be equal to a sum of a second set of CPU numbers for TRP selection, wherein each CPU number for TRP selection within the second set may correspond to all TRP selections consisting of a respective number of TRPs from N TRP TRPs.
  • the corresponding number of CPUs may be equal to a sum of a first CPU number for TRP selection corresponding to all TRP selections consisting of one TRP and a second CPU number for TRP selection corresponding to all TRP selections consisting of 2 TRPs.
  • the corresponding number of CPUs may be equal to a sum of a first CPU number for TRP selection corresponding to all TRP selections consisting of one TRP, a second CPU number for TRP selection corresponding to all TRP selections consisting of 2 TRPs, and a third CPU number for TRP selection corresponding to all TRP selections consisting of 3 TRPs.
  • the corresponding number of CPUs may be equal to a sum of a first CPU number for TRP selection corresponding to all TRP selections consisting of one TRP, a second CPU number for TRP selection corresponding to all TRP selections consisting of 2 TRPs, a third CPU number for TRP selection corresponding to all TRP selections consisting of 3 TRPs, and a fourth CPU number for TRP selection corresponding to all TRP selections consisting of 4 TRPs.
  • first, second, third, and fourth CPU numbers may have other values in other examples.
  • the one or multiple numbers of CPUs for CJT reported in case 2 may be backward compatible with case 1.
  • the UE may be considered to have a high hardware processing capability in the case of supporting TRP selection.
  • the UE may support beam number combination selection but not support TRP selection.
  • N TRP For a configured value of N TRP , a set of N L combinations of values for ⁇ L 1 , ..., L NTRP ⁇ is configured by the BS via higher-layer (RRC) signaling.
  • RRC higher-layer
  • the beam number combination number N L > 1 the selected combination of values for ⁇ L 1 , ..., L NTRP ⁇ is reported by an indicator in a CSI report.
  • additional UE realization complexity is related with beam selection algorithm.
  • Each of the one or multiple numbers of CPUs for CJT indicated in the UE capability information reported in operation 210 may correspond to a respective number of TRPs. Additionally or alternatively, each of the one or multiple numbers of CPUs may be related with a respective number of beam number combinations.
  • N TRP configured for CJT may be 2, 3, or 4, and the configured N L may be 1, 2, or 4.
  • the UE may report 9 numbers of CPUs for CJT respectively corresponding to a value for N TRP from ⁇ 2, 3, 4 ⁇ and a value for N L from ⁇ 1, 2, 4 ⁇ .
  • the UE may report part of the 9 numbers of CPUs for CJT, e.g. one or two or three numbers based on assumed UE capability.
  • the assumed UE capability may correspond to specific TRP number and specific beam number combination.
  • the UE may report part of the 9 numbers of CPUs for CJT; and other CPU number (s) for specific TRP number (s) and specific beam number combination (s) can be implicitly derived based on the reported value (s) and the introduced schemes of the present disclosure.
  • a number of CPUs within the one or multiple numbers of CPUs which corresponds to N TRP TRPs and N L beam number combinations may be equal to:
  • the UE may not need any additional CPU for beam number combination selection, so the designs for CPU number reporting described in case 1 may also apply here, for example, the base number may be equal to N TRP (for high hardware processing capability) or N TRP plus a first additional number of CPUs (for medium or low hardware processing capability) ;
  • the first additional number may be 1 or 2.
  • the second additional number may be 1.
  • the third additional number may be 2.
  • the first multiple may be 2, and the second multiple may be 4. It is contemplated that other values may be applied to these numbers or multiples.
  • the one or more numbers of CPUs for CJT reported in case 3 may be backward compatible with case 1.
  • the UE may be considered to have a high hardware processing capability in the case of supporting beam number combination selection.
  • each of the one or multiple numbers of CPUs for CJT indicated in the UE capability information reported in operation 210 may correspond to a respective number of TRPs and a respective number of bean number combinations. Additionally or alternatively, each of the one or multiple numbers of CPUs may be related with a number of TRP selections from the respective number of TRPs.
  • the configured TRP number N TRP may be 2, 3, or 4
  • the configured beam number combination number N L may be 1, 2, or 4.
  • the UE may report 9 numbers of CPUs for CJT respectively corresponding to a value for N TRP from ⁇ 2, 3, 4 ⁇ and a value for N L from ⁇ 1, 2, 4 ⁇ .
  • the UE may report part of the 9 numbers of CPUs for CJT, e.g. one or two or three numbers based on assumed UE capability.
  • the assumed UE capability may correspond to specific TRP number and specific beam number combination.
  • the UE may report part of the 9 numbers of CPUs for CJT; and other CPU number (s) for specific TRP number (s) and specific beam number combination (s) can be implicitly derived based on the reported value (s) and the introduced schemes of the present disclosure.
  • a number of CPUs within the one or multiple numbers of CPUs which corresponds to N TRP TRPs and N L beam number combinations may be equal to:
  • the UE may not need any additional CPU for beam number combination selection, so the designs for CPU number reporting described in case 2 may also apply here, for example, the base number may be equal to:
  • ⁇ a sum of a first set of CPU numbers for TRP selection, each CPU number for TRP selection within the first set corresponding to a TRP selection consisting of a respective number of TRPs selected from N TRP TRPs (e.g., based on RSRP values) ; or
  • the first additional number may be 1 or 2.
  • the second additional number may be 1.
  • the third additional number may be 2.
  • the first multiple may be 2, and the second multiple may be 4. It is contemplated that other values may be applied to these numbers or multiples.
  • Table 1 illustrates exemplary candidate numbers of CPUs respectively corresponding to a value for N TRP from ⁇ 2, 3, 4 ⁇ and a value for N L from ⁇ 1, 2, 4 ⁇ .
  • the one or more numbers of CPUs for CJT reported in case 4 may be backward compatible with any of cases 1-3.
  • the UE may be considered to have a high hardware processing capability in the case of supporting both TRP selection and beam number combination selection.
  • the required CPU number (or the number of CPUs to be occupied) for CSI updating is larger than that for a UE not supporting TRP selection or beam number combination selection. Therefore, if the number of unoccupied CPUs for CSI updating is smaller than the required CPU number for CSI updating in the case of supporting TRP selection and/or beam number combination selection, it is not efficient that CSI is not updated; this is because it is possible that CSI based on some transmission assumptions including specific TRP selection and/or specific beam number combination can be updated by using the unoccupied CPU.
  • the present application provides several solutions for updating CSI for CJT in the case that unoccupied CPUs can support CSI updating based on at least one of part of candidate TRP selections or part of candidate beam number combinations.
  • the UE may update CSI based on at least one of a selected candidate TRP selection or a selected beam number combination selection.
  • the selected candidate TRP selection or selected beam number combination selection may correspond to a CPU number smaller than the number of unoccupied CPUs.
  • the UE may perform CSI updating based on at least one of (1) a TRP selection selected from the part of candidate TRP selections or (2) a beam number combination selected from the part of candidate beam number combinations. Then, the UE may transmit a CSI report based on the updating. In some embodiments, the UE may further report information indicating at least one of the selected TRP selection or the selected beam number combination to the BS, e.g., via uplink control information (UCI) .
  • UCI uplink control information
  • the UE may update CSI based on the at least one of the default candidate TRP selection or default candidate beam number combination.
  • the UE in response to determining that a number of the unoccupied CPU (s) is no smaller than a CPU number required for updating CSI corresponding to at least one of (1) a default TRP selection but not all of candidate TRP selections or (2) a default beam number combination but not all of candidate beam number combinations, the UE may perform CSI updating based on at least one of the default TRP selection or the default beam number combination. Then, the UE may transmit a CSI report based on the updating. In some embodiments, the UE may further report information indicating at least one of the default TRP selection or the default beam number combination to the BS, e.g., via UCI. In some embodiments, the default TRP selection may include all configured TRPs for TRP selection.
  • the default TRP selection may include a number (e.g., 2) of TRPs with larger RSRP values than others among all the TRPs.
  • the default beam number combination may have a lowest index among the candidate beam number combinations.
  • CPU number reporting may be performed with finer granularity.
  • each of the one or multiple numbers of CPUs for CJT indicated in the UE capability information reported in operation 210 may correspond to at least one of a respective TRP selection or a respective beam number combination.
  • the UE may performs CSI updating according to a priority of each CSI report which is determined based at least in part on at least one of:
  • an index of a TRP selection corresponding to the CSI report (e.g., denoted by I k ) ;
  • N l an index of a beam number combination corresponding to the CSI report
  • N L a total number of candidate beam number combinations
  • the priority of a CSI report may be determined based on the following Formula 1 or Formula 2:
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • SINR signal to interference plus noise ratio
  • - N cells is the value of the maximum number of the serving cells (e.g., the higher layer parameter maxNrofServingCells)
  • - s is a serving cell index
  • CSI updating may be performed more efficiently.
  • Fig. 3 illustrates a flowchart of an exemplary method 300 for CJT according to some embodiments of the present disclosure.
  • the method 300 may be performed by a BS or other devices with similar functions.
  • the BS may receive, from a UE, UE capability information indicating one or multiple numbers of CPUs for CJT.
  • the designs for CPU number reporting described with respect to Fig. 2 may also apply here.
  • the BS may configure CSI for the UE based at least in part on the CPU number (s) reported by the UE.
  • the BS may receive at least one CSI report from the UE.
  • Fig. 4 illustrates a simplified block diagram of an exemplary apparatus 400 according to some embodiments of the present disclosure.
  • an example of the apparatus 400 may include at least one processor 404 and at least one transceiver 402 coupled to the processor 404.
  • the apparatus 400 may be a UE, a BS or any other device with similar functions.
  • the transceiver 402 may be divided into two devices, such as a receiving circuitry and a transmitting circuitry.
  • the apparatus 400 may further include an input device, a memory, and/or other components.
  • the apparatus 400 may be a UE.
  • the transceiver 402 and the processor 404 may interact with each other so as to perform the operations of a UE as described with respect to Fig. 2.
  • the transceiver 402 may report UE capability information indicating one or multiple numbers of CPUs for CJT, and perform CSI updating by using unoccupied CPU (s) .
  • the apparatus 400 may be a BS.
  • the transceiver 402 and the processor 404 may interact with each other so as to perform the operations of a BS as described with respect to Fig. 3.
  • the transceiver 402 may receive, from a UE, UE capability information indicating one or multiple numbers of CPUs for CJT, and receive at least one CSI report from the UE.
  • the apparatus 400 may further include at least one non-transitory computer-readable medium.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 404 to implement any method described above with respect to a UE.
  • the computer-executable instructions when executed, may cause the processor 404 interacting with the transceiver 402 to perform the operations of a UE as described with respect to Fig. 2.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 404 to implement any method described above with respect to a BS.
  • the computer-executable instructions when executed, may cause the processor 404 interacting with the transceiver 402 to perform the operations of a BS as described with respect to Fig. 3.
  • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne des procédés et des appareils de transmission conjointe cohérente (CJT). Un mode de réalisation de la présente invention concerne un équipement utilisateur (UE), comprenant : un émetteur-récepteur qui rapporte des informations de capacité d'UE indiquant un ou plusieurs nombres d'unités de traitement (CPU) d'informations d'état de canal (CSI) pour la CJT, et un processeur qui est couplé à l'émetteur-récepteur et effectue une mise à jour de CSI en utilisant une ou plusieurs CPU inoccupées.
PCT/CN2023/085985 2023-04-03 2023-04-03 Procédés et appareils de transmission conjointe cohérente WO2024074021A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/085985 WO2024074021A1 (fr) 2023-04-03 2023-04-03 Procédés et appareils de transmission conjointe cohérente

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/085985 WO2024074021A1 (fr) 2023-04-03 2023-04-03 Procédés et appareils de transmission conjointe cohérente

Publications (1)

Publication Number Publication Date
WO2024074021A1 true WO2024074021A1 (fr) 2024-04-11

Family

ID=90607413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/085985 WO2024074021A1 (fr) 2023-04-03 2023-04-03 Procédés et appareils de transmission conjointe cohérente

Country Status (1)

Country Link
WO (1) WO2024074021A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022073154A1 (fr) * 2020-10-06 2022-04-14 Qualcomm Incorporated Techniques de rapport d'informations d'état de canal commun pour de multiples schémas de communication de point d'émission et de réception
WO2023003295A1 (fr) * 2021-07-20 2023-01-26 엘지전자 주식회사 Procédé et dispositif d'émission/réception d'informations d'état de canal dans un système de communication sans fil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022073154A1 (fr) * 2020-10-06 2022-04-14 Qualcomm Incorporated Techniques de rapport d'informations d'état de canal commun pour de multiples schémas de communication de point d'émission et de réception
WO2023003295A1 (fr) * 2021-07-20 2023-01-26 엘지전자 주식회사 Procédé et dispositif d'émission/réception d'informations d'état de canal dans un système de communication sans fil

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
INTEL CORPORATION: "On CSI enhancements for MTRP and FDD", 3GPP DRAFT; R1-2109597, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20211011 - 20211019, 2 October 2021 (2021-10-02), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052058540 *
SEUNGHEE HAN, INTEL CORPORATION: "On CSI enhancements", 3GPP DRAFT; R1-2300934; TYPE DISCUSSION; NR_MIMO_EVO_DL_UL-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Athens, GR; 20230227 - 20230303, 18 February 2023 (2023-02-18), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052248077 *
SHINYA KUMAGAI, NTT DOCOMO, INC.: "Discussion on CSI enhancement", 3GPP DRAFT; R1-2301479; TYPE DISCUSSION; NR_MIMO_EVO_DL_UL-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Athens, GR; 20230227 - 20230303, 17 February 2023 (2023-02-17), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052248611 *

Similar Documents

Publication Publication Date Title
US11637667B2 (en) Method and apparatus for transmitting and receiving uplink signal, storage medium, and electronic device
US20220141803A1 (en) Method and device for determining codebook subset, and user equipment
US20190159080A1 (en) UE Reported SRS Switching Capability
WO2021013013A1 (fr) Procédés et dispositifs pour déterminer une relation spatiale, équipement utilisateur et dispositif de réseau
EP3860091B1 (fr) Procédé et dispositif de réception d'informations et procédé et dispositif d'envoi d'informations
WO2021207935A1 (fr) Procédé et appareil de gestion de faisceau sur liaison latérale
US11445563B2 (en) Secondary cell link recovery request transmission
CN112312463A (zh) 上报信道状态信息的方法和装置
CN104468182A (zh) 在时分双工系统中处理测量模式的方法及其通信装置
WO2024074021A1 (fr) Procédés et appareils de transmission conjointe cohérente
CN116250328A (zh) 状态切换的方法、终端设备和网络设备
WO2024087587A1 (fr) Procédés et appareils de calcul et de rapport de csi pour une transmission conjointe cohérente
WO2024065275A1 (fr) Procédés et appareils de rapport de csi
WO2023205995A1 (fr) Procédés et appareils de transmission pusch non basée sur livre de codes
WO2022205302A1 (fr) Procédé et appareil de transmission pusch avec répétitions
WO2024007240A1 (fr) Procédés et appareils de transmission pusch
WO2023000129A1 (fr) Procédés et appareils de transmission de canal physique de contrôle montant
WO2024082413A1 (fr) Procédé et appareil de prise en charge d'adaptation d'élément spatial
WO2022193252A1 (fr) Procédés de communication, dispositif terminal, dispositif de réseau et support lisible par ordinateur
WO2024031623A1 (fr) Équipement d'utilisateur, station de base et procédé de transmission de liaison montante à autorisation configurée
WO2023056605A1 (fr) Procédé et appareil de détermination de faisceau
WO2023216233A1 (fr) Procédé et appareil de détermination de valeur associée à un élément d'antenne
EP3799518A1 (fr) Transmission d'une requête de récupération d'une liaison de cellules secondaires
WO2024031515A1 (fr) Procédés et appareils de transmission de message de rétroaction de csi
WO2021248449A1 (fr) Procédés et appareil de configuration d'une ressource de csi-rs pour un ensemble de ressource de srs

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: 23874216

Country of ref document: EP

Kind code of ref document: A1