WO2023130297A1 - Paramètres de commande de puissance correspondant à une reprise sur défaillance de faisceau - Google Patents

Paramètres de commande de puissance correspondant à une reprise sur défaillance de faisceau Download PDF

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Publication number
WO2023130297A1
WO2023130297A1 PCT/CN2022/070443 CN2022070443W WO2023130297A1 WO 2023130297 A1 WO2023130297 A1 WO 2023130297A1 CN 2022070443 W CN2022070443 W CN 2022070443W WO 2023130297 A1 WO2023130297 A1 WO 2023130297A1
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WIPO (PCT)
Prior art keywords
power control
control parameters
transmission
channel
symbols
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PCT/CN2022/070443
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English (en)
Inventor
Chenxi Zhu
Bingchao LIU
Wei Ling
Original Assignee
Lenovo (Beijing) Limited
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Priority to PCT/CN2022/070443 priority Critical patent/WO2023130297A1/fr
Publication of WO2023130297A1 publication Critical patent/WO2023130297A1/fr

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    • 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
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H04B7/06964—Re-selection of one or more beams after beam failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/247—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity

Definitions

  • the subject matter disclosed herein relates generally to wireless communications and more particularly relates to power control parameters corresponding to beam failure recovery.
  • a beam failure recovery process may be performed.
  • power control may be used.
  • One embodiment of a method includes receiving, at a user equipment, a first number of symbols from a base station.
  • the first number of symbols include a beam failure recovery response, and the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission.
  • the method includes, after receiving the first number of symbols and before receiving an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, determining power control parameters to use for UL transmission of a channel.
  • the method includes transmitting the UL transmission on the channel to the base station based on the determined power control parameters.
  • One apparatus for power control parameters corresponding to beam failure recovery includes a user equipment.
  • the apparatus includes a receiver that receives a first number of symbols from a base station.
  • the first number of symbols include a beam failure recovery response, and the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission.
  • the apparatus includes a processor that, after receiving the first number of symbols and before receiving an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, determines power control parameters to use for UL transmission of a channel.
  • the apparatus includes a transmitter that transmits the UL transmission on the channel to the base station based on the determined power control parameters.
  • Another embodiment of a method for power control parameters corresponding to beam failure recovery includes transmitting, from a base station, a first number of symbols to a user equipment (UE) .
  • the first number of symbols include a beam failure recovery response, the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission, and, after transmitting the first number of symbols and before transmitting an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, power control parameters for the UE to use for UL transmission of a channel are determined.
  • the method includes receiving the UL transmission from the UE on the channel based on the determined power control parameters.
  • the apparatus includes a transmitter that transmits a first number of symbols to a user equipment (UE) .
  • the first number of symbols comprises a beam failure recovery response, the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission, and, after transmitting the first number of symbols and before transmitting an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, power control parameters for the UE to use for UL transmission of a channel are determined.
  • the apparatus includes a receiver that receives the UL transmission from the UE on the channel based on the determined power control parameters.
  • Figure 1 is a schematic block diagram illustrating one embodiment of a wireless communication system for power control parameters corresponding to beam failure recovery
  • Figure 2 is a schematic block diagram illustrating one embodiment of an apparatus that may be used for power control parameters corresponding to beam failure recovery;
  • Figure 3 is a schematic block diagram illustrating one embodiment of an apparatus that may be used for power control parameters corresponding to beam failure recovery;
  • Figure 4 is a schematic block diagram illustrating one embodiment of a system for power control parameters corresponding to beam failure recovery
  • Figure 5 is a flow chart diagram illustrating one embodiment of a method for power control parameters corresponding to beam failure recovery.
  • Figure 6 is a flow chart diagram illustrating another embodiment of a method for power control parameters corresponding to beam failure recovery.
  • embodiments may be embodied as a system, apparatus, method, or program product. Accordingly, embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc. ) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “circuit, ” “module” or “system. ” Furthermore, embodiments may take the form of a program product embodied in one or more computer readable storage devices storing machine readable code, computer readable code, and/or program code, referred hereafter as code. The storage devices may be tangible, non-transitory, and/or non-transmission. The storage devices may not embody signals. In a certain embodiment, the storage devices only employ signals for accessing code.
  • modules may be implemented as a hardware circuit comprising custom very-large-scale integration ( “VLSI” ) circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components.
  • VLSI very-large-scale integration
  • a module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
  • Modules may also be implemented in code and/or software for execution by various types of processors.
  • An identified module of code may, for instance, include one or more physical or logical blocks of executable code which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may include disparate instructions stored in different locations which, when joined logically together, include the module and achieve the stated purpose for the module.
  • a module of code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices.
  • operational data may be identified and illustrated herein within modules, and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different computer readable storage devices.
  • the software portions are stored on one or more computer readable storage devices.
  • the computer readable medium may be a computer readable storage medium.
  • the computer readable storage medium may be a storage device storing the code.
  • the storage device may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, holographic, micromechanical, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • a storage device More specific examples (a non-exhaustive list) of the storage device would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory ( “RAM” ) , a read-only memory ( “ROM” ) , an erasable programmable read-only memory ( “EPROM” or Flash memory) , a portable compact disc read-only memory (CD-ROM” ) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • Code for carrying out operations for embodiments may be any number of lines and may be written in any combination of one or more programming languages including an object oriented programming language such as Python, Ruby, Java, Smalltalk, C++, or the like, and conventional procedural programming languages, such as the "C" programming language, or the like, and/or machine languages such as assembly languages.
  • the code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server.
  • the remote computer may be connected to the user's computer through any type of network, including a local area network ( “LAN” ) or a wide area network ( “WAN” ) , or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider) .
  • LAN local area network
  • WAN wide area network
  • the code may also be stored in a storage device that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the storage device produce an article of manufacture including instructions which implement the function/act specified in the schematic flowchart diagrams and/or schematic block diagrams block or blocks.
  • the code may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the code which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
  • each block in the schematic flowchart diagrams and/or schematic block diagrams may represent a module, segment, or portion of code, which includes one or more executable instructions of the code for implementing the specified logical function (s) .
  • Figure 1 depicts an embodiment of a wireless communication system 100 for power control parameters corresponding to beam failure recovery.
  • the wireless communication system 100 includes remote units 102 and network units 104. Even though a specific number of remote units 102 and network units 104 are depicted in Figure 1, one of skill in the art will recognize that any number of remote units 102 and network units 104 may be included in the wireless communication system 100.
  • the remote units 102 may include computing devices, such as desktop computers, laptop computers, personal digital assistants ( “PDAs” ) , tablet computers, smart phones, 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, modems) , aerial vehicles, drones, or the like.
  • the remote units 102 include wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like.
  • the remote units 102 may be referred to as subscriber units, mobiles, mobile stations, users, terminals, mobile terminals, fixed terminals, subscriber stations, UE, user terminals, a device, or by other terminology used in the art.
  • the remote units 102 may communicate directly with one or more of the network units 104 via UL communication signals. In certain embodiments, the remote units 102 may communicate directly with other remote units 102 via sidelink communication.
  • the network units 104 may be distributed over a geographic region.
  • a network unit 104 may also be referred to and/or may include one or more of an access point, an access terminal, a base, a base station, a location server, a core network ( “CN” ) , a radio network entity, a Node-B, an evolved node-B ( “eNB” ) , a 5G node-B ( “gNB” ) , a Home Node-B, a relay node, a device, a core network, an aerial server, a radio access node, an access point ( “AP” ) , new radio ( “NR” ) , a network entity, an access and mobility management function ( “AMF” ) , a unified data management ( “UDM” ) , a unified data repository ( “UDR” ) , a UDM/UDR, a policy control function ( “PCF” ) , a radio access network ( “RAN”
  • the network units 104 are generally part of a radio access network that includes one or more controllers communicably coupled to one or more corresponding network units 104.
  • the radio access network is generally communicably coupled to one or more core networks, which may be coupled to other networks, like the Internet and public switched telephone networks, among other networks. These and other elements of radio access and core networks are not illustrated but are well known generally by those having ordinary skill in the art.
  • the wireless communication system 100 is compliant with NR protocols standardized in third generation partnership project ( “3GPP” ) , wherein the network unit 104 transmits using an OFDM modulation scheme on the downlink ( “DL” ) and the remote units 102 transmit on the uplink ( “UL” ) using a single-carrier frequency division multiple access ( “SC-FDMA” ) scheme or an orthogonal frequency division multiplexing ( “OFDM” ) scheme.
  • 3GPP third generation partnership project
  • SC-FDMA single-carrier frequency division multiple access
  • OFDM orthogonal frequency division multiplexing
  • the wireless communication system 100 may implement some other open or proprietary communication protocol, for example, WiMAX, institute of electrical and electronics engineers ( “IEEE” ) 802.11 variants, global system for mobile communications ( “GSM” ) , general packet radio service ( “GPRS” ) , universal mobile telecommunications system ( “UMTS” ) , long term evolution ( “LTE” ) variants, code division multiple access 2000 ( “CDMA2000” ) , ZigBee, Sigfoxx, among other protocols.
  • WiMAX institute of electrical and electronics engineers
  • IEEE institute of electrical and electronics engineers
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • UMTS universal mobile telecommunications system
  • LTE long term evolution
  • CDMA2000 code division multiple access 2000
  • ZigBee ZigBee
  • Sigfoxx among other protocols.
  • the network units 104 may serve a number of remote units 102 within a serving area, for example, a cell or a cell sector via a wireless communication link.
  • the network units 104 transmit DL communication signals to serve the remote units 102 in the time, frequency, and/or spatial domain.
  • a remote unit 102 may receive a first number of symbols from a base station.
  • the first number of symbols include a beam failure recovery response, and the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission.
  • the remote unit 102 may, after receiving the first number of symbols and before receiving an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, determine power control parameters to use for UL transmission of a channel.
  • the remote unit 102 may transmit the UL transmission on the channel to the base station based on the determined power control parameters. Accordingly, the remote unit 102 may be used for power control parameters corresponding to beam failure recovery.
  • UL uplink
  • TCI transmission configuration indicator
  • the remote unit 102 may transmit the UL transmission on the channel to the base station based on the determined power control parameters. Accordingly, the remote unit 102 may be used for power control parameters corresponding to beam failure recovery.
  • a network unit 104 may transmit a first number of symbols to a user equipment (UE) .
  • the first number of symbols include a beam failure recovery response, the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission, and, after transmitting the first number of symbols and before transmitting an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, power control parameters for the UE to use for UL transmission of a channel are determined.
  • the network unit 104 may receive the UL transmission from the UE on the channel based on the determined power control parameters. Accordingly, the network unit 104 may be used for power control parameters corresponding to beam failure recovery.
  • Figure 2 depicts one embodiment of an apparatus 200 that may be used for power control parameters corresponding to beam failure recovery.
  • the apparatus 200 includes one embodiment of the remote unit 102.
  • the remote unit 102 may include a processor 202, a memory 204, an input device 206, a display 208, a transmitter 210, and a receiver 212.
  • the input device 206 and the display 208 are combined into a single device, such as a touchscreen.
  • the remote unit 102 may not include any input device 206 and/or display 208.
  • the remote unit 102 may include one or more of the processor 202, the memory 204, the transmitter 210, and the receiver 212, and may not include the input device 206 and/or the display 208.
  • the processor 202 may include any known controller capable of executing computer-readable instructions and/or capable of performing logical operations.
  • the processor 202 may be a microcontroller, a microprocessor, a central processing unit ( “CPU” ) , a graphics processing unit ( “GPU” ) , an auxiliary processing unit, a field programmable gate array ( “FPGA” ) , or similar programmable controller.
  • the processor 202 executes instructions stored in the memory 204 to perform the methods and routines described herein.
  • the processor 202 is communicatively coupled to the memory 204, the input device 206, the display 208, the transmitter 210, and the receiver 212.
  • the memory 204 in one embodiment, is a computer readable storage medium.
  • the memory 204 includes volatile computer storage media.
  • the memory 204 may include a RAM, including dynamic RAM ( “DRAM” ) , synchronous dynamic RAM ( “SDRAM” ) , and/or static RAM ( “SRAM” ) .
  • the memory 204 includes non-volatile computer storage media.
  • the memory 204 may include a hard disk drive, a flash memory, or any other suitable non-volatile computer storage device.
  • the memory 204 includes both volatile and non-volatile computer storage media.
  • the memory 204 also stores program code and related data, such as an operating system or other controller algorithms operating on the remote unit 102.
  • the input device 206 may include any known computer input device including a touch panel, a button, a keyboard, a stylus, a microphone, or the like.
  • the input device 206 may be integrated with the display 208, for example, as a touchscreen or similar touch-sensitive display.
  • the input device 206 includes a touchscreen such that text may be input using a virtual keyboard displayed on the touchscreen and/or by handwriting on the touchscreen.
  • the input device 206 includes two or more different devices, such as a keyboard and a touch panel.
  • the display 208 may include any known electronically controllable display or display device.
  • the display 208 may be designed to output visual, audible, and/or haptic signals.
  • the display 208 includes an electronic display capable of outputting visual data to a user.
  • the display 208 may include, but is not limited to, a liquid crystal display ( “LCD” ) , a light emitting diode ( “LED” ) display, an organic light emitting diode ( “OLED” ) display, a projector, or similar display device capable of outputting images, text, or the like to a user.
  • LCD liquid crystal display
  • LED light emitting diode
  • OLED organic light emitting diode
  • the display 208 may include a wearable display such as a smart watch, smart glasses, a heads-up display, or the like. Further, the display 208 may be a component of a smart phone, a personal digital assistant, a television, a table computer, a notebook (laptop) computer, a personal computer, a vehicle dashboard, or the like.
  • the display 208 includes one or more speakers for producing sound.
  • the display 208 may produce an audible alert or notification (e.g., a beep or chime) .
  • the display 208 includes one or more haptic devices for producing vibrations, motion, or other haptic feedback.
  • all or portions of the display 208 may be integrated with the input device 206.
  • the input device 206 and display 208 may form a touchscreen or similar touch-sensitive display.
  • the display 208 may be located near the input device 206.
  • the receiver 212 receives a first number of symbols from a base station.
  • the first number of symbols include a beam failure recovery response, and the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission.
  • the processor 202 after receiving the first number of symbols and before receiving an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, determines power control parameters to use for UL transmission of a channel.
  • the transmitter 210 transmits the UL transmission on the channel to the base station based on the determined power control parameters.
  • the remote unit 102 may have any suitable number of transmitters 210 and receivers 212.
  • the transmitter 210 and the receiver 212 may be any suitable type of transmitters and receivers.
  • the transmitter 210 and the receiver 212 may be part of a transceiver.
  • Figure 3 depicts one embodiment of an apparatus 300 that may be used for power control parameters corresponding to beam failure recovery.
  • the apparatus 300 includes one embodiment of the network unit 104.
  • the network unit 104 may include a processor 302, a memory 304, an input device 306, a display 308, a transmitter 310, and a receiver 312.
  • the processor 302, the memory 304, the input device 306, the display 308, the transmitter 310, and the receiver 312 may be substantially similar to the processor 202, the memory 204, the input device 206, the display 208, the transmitter 210, and the receiver 212 of the remote unit 102, respectively.
  • the transmitter 310 transmits a first number of symbols to a user equipment (UE) .
  • the first number of symbols comprises a beam failure recovery response, the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission, and, after transmitting the first number of symbols and before transmitting an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, power control parameters for the UE to use for UL transmission of a channel are determined.
  • the receiver 312 receives the UL transmission from the UE on the channel based on the determined power control parameters.
  • power control is part of a new transmission configuration indicator ( “TCI” ) framework (e.g., in release 17 ( “R17” ) ) .
  • TCI transmission configuration indicator
  • power control parameters may be used for physical uplink control channel ( “PUCCH” ) and/or physical uplink shared channel ( “PUSCH” ) during beam failure recovery.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • a user equipment transmits a PUSCH on active uplink ( “UL” ) bandwidth part ( “BWP” ) b of carrier f of serving cell c using parameter set configuration with index j and PUSCH power control adjustment state with index l
  • the UE determines the PUSCH transmission power P PUSCH, b, f, c (i, j, q d , l) in PUSCH transmission occasion i as:
  • P O_PUSCHb, , f, c (j) is a parameter that includes the sum of a component P O_NOMINAL_PUSCH, f, c (j) and a component P O_UE_PUSC, Hb, f, c (j) where j ⁇ ⁇ 0, 1, ..., J-1 ⁇ .
  • RRC dedicated radio resource control
  • P O_NOMINAL_PUSCH, f, c (1) P O_NOMINALP_USCH, f, c (0) if p0-NominalWithoutGrant is not provided, and P O_UE_PUSCH, b, f, c (1) is provided by p0 obtained from p0-PUSCH-Alpha in ConfiguredGrantConfig that provides an index P0-PUSCH-AlphaSetId to a set of P0-PUSCH-AlphaSet for active UL BWP b of carrier f of serving cell c.
  • the UE obtains a mapping from sri-PUSCH-PowerControlId in SRI-PUSCH-PowerControl between a set of values for the SRI field in the DCI format and a set of indexes provided by p0-PUSCH-AlphaSetId that map to a set of P0-PUSCH-AlphaSet values and determines the value of P O_UE_PUSCH, b, f, c (j) from the p0-PUSCH-AlphaSetId value that is mapped to the SRI field value.
  • DCI downlink control information
  • SRI scheduling request indicator
  • the UE determines a value of P O_UE_PUSCH, b, f, c (j) from a first value in P0-PUSCH-Set with a p0-PUSCH-SetId value mapped to the SRI field value.
  • P0-PUSCH-Set is provided to the UE and the DCI format includes an open-loop power control parameter set indication field
  • the UE determines a value of P O_UE_PUSCH, b, f, c (j) from: 1) a first P0-PUSCH-AlphaSet in p0-AlphaSets if a value of the open-loop power control parameter set indication field is '0' or '00' ; 2) a first value in P0-PUSCH-Set with the lowest p0-PUSCH-SetID value if a value of the open-loop power control parameter set indication field is '1' or '01' ; 3) a second value in P0-PUSCH-Set with the lowest p0-PUSCH-SetID value if a value of the open-loop power control parameter set indication field is '10' ; and 4) else, the UE determines P O_UE_PUSCH, b, f, c (j) from the value of the first P0-PUSCH-Alpha
  • the UE obtains a mapping from sri-PUSCH-PowerControlId in SRI-PUSCH-PowerControl between a set of values for the SRI field in the DCI format and a set of indexes provided by p0-PUSCH-AlphaSetId that map to a set of P0-PUSCH-AlphaSet values and determines the values of ⁇ b, f, c (j) from the p0-PUSCH-AlphaSetId value that is mapped to the SRI field value.
  • the UE determines ⁇ b, f, c (j) from the value of the first P0-PUSCH-AlphaSet in p0-AlphaSets.
  • ⁇ is the bandwidth of the PUSCH resource assignment expressed in number of resource blocks for PUSCH transmission occasion i on active UL BWP b of carrier f of serving cell c and ⁇ is a subcarrier spacing ( “SCS” ) configuration.
  • PL b, f, c (q d ) is a downlink pathloss estimate in dB calculated by the UE using reference signal ( “RS” ) index q d for the active downlink ( “DL” ) BWP, of carrier f of serving cell c.
  • the UE calculates PL b, f, c (q d ) using a RS resource from a synchronization signal ( “SS” ) and/or physical broadcast channel ( “PBCH” ) ( “SS/PBCH” ) block with a same SS/PBCH block index as the one the UE uses to obtain a master information block ( “MIB” ) .
  • SS synchronization signal
  • PBCH physical broadcast channel
  • MIB master information block
  • the set of RS resource indexes can include one or both of a set of SS/PBCH block indexes, each provided by ssb-Index when a value of a corresponding pusch-PathlossReferenceRS-Id maps to a SS/PBCH block index, and a set of CSI-RS resource indexes, each provided by csi-RS-Index when a value of a corresponding pusch-PathlossReferenceRS-Id maps to a CSI-RS resource index.
  • the UE identifies a RS resource index q d in the set of RS resource indexes to correspond either to a SS/PBCH block index or to a CSI-RS resource index as provided by pusch-PathlossReferenceRS-Id in PUSCH-PathlossReferenceRS. If the PUSCH transmission is scheduled by a RAR UL grant, or for a PUSCH transmission for Type-2 random access procedure, the UE uses the same RS resource index q d as for a corresponding physical random access channel ( “PRACH” ) transmission.
  • PRACH physical random access channel
  • the UE obtains a mapping from sri-PUSCH-PowerControlId in SRI-PUSCH-PowerControl between a set of values for the SRI field in a DCI format scheduling the PUSCH transmission and a set of PUSCH-PathlossReferenceRS-Id values and determines the RS resource index q d from the value of PUSCH-PathlossReferenceRS-Id that is mapped to the SRI field value where the RS resource is either on serving cell c or, if provided, on a serving cell indicated by a value of pathlossReferenceLinking.
  • the UE uses the same RS resource index q d as for a PUCCH transmission in the PUCCH resource with the lowest index.
  • the UE uses the same RS resource index q d as for an SRS resource set with an SRS resource associated with the PUSCH transmission.
  • a UE transmits a PUCCH on active UL BWP b of carrier f in the primary cell c using PUCCH power control adjustment state with index l
  • the UE determines the PUCCH transmission power P PUCCH, b, f, c (i, q u , q d , l) in PUCCH transmission occasion i as:
  • P CMAX, f, c (i) is the UE configured maximum output power for carrier f of primary cell c in PUCCH transmission occasion i
  • Q u is a size for a set of P O_UE_PUCCH values provided by maxNrofPUCCH-P0-PerSet.
  • the UE obtains a mapping, by an index provided by p0-PUCCH-Id, between a set of pucch-SpatialRelationInfoId values and a set of p0-PUCCH-Value values. If the UE is provided more than one values for pucch-SpatialRelationInfoId and the UE receives an activation command indicating a value of pucch-SpatialRelationInfoId, the UE determines the p0-PUCCH-Value value through the link to a corresponding p0-PUCCH-Id index.
  • the UE applies the activation command in the first slot that is after slot where k is the slot where the UE would transmit a PUCCH with HARQ-ACK information for the PDSCH providing the activation command and ⁇ is the SCS configuration for the PUCCH. If the UE is not provided PUCCH-SpatialRelationInfo, the UE obtains the p0-PUCCH-Value value from the P0-PUCCH with p0-PUCCH-Id value equal to the minimum p0-PUCCH-Id value in p0-Set.
  • PL b, f, c (q d ) is a downlink pathloss estimate in dB calculated by the UE using RS resource index q d for the active DL BWP b of carrier f of the primary cell c.
  • the pathloss reference RS (PL-RS) , parameter p0 (PO_UE_PUSCH for PUSCH and PO_UE_PUCCH for PUCCH) , parameter alpha (for PUSCH only) , and closed loop index (for PUCCH and PUSCH) may be important parameters and may need to be determined for transmission power computation.
  • a UE may need to know which power control parameters to use for PUCCH and PUSCH.
  • the power control parameter type may depend on different UL channel and/or signal types.
  • a UE specific parameter including PL-RS e.g., reference RS for pathloss calculation
  • PL-RS e.g., reference RS for pathloss calculation
  • p0 e.g., p0
  • a closed loop index for power control command may need to be determined.
  • the PL-RS is determined by the parameter q d
  • p0 is determined by the parameter q u
  • the closed loop index is l.
  • a new beam q new either reported in a medium access control ( “MAC” ) control element ( “CE” ) ( “MAC-CE” ) to a network ( “NW” ) or used for a last PRACH transmission to the NW can be used as both the UL TX spatial filter spatial filter and the path-loss RS, so q d can be the same as q new .
  • MAC medium access control
  • CE control element
  • NW path-loss RS
  • q d can be the same as q new .
  • the parameter p0 and the closed loop index either the ⁇ p0, closed loop index ⁇ associated with a specific UL or joint TCI state can be used, or a certain ⁇ p0, closed loop index ⁇ from the configured values of p0-PUCCH and closed loop index.
  • the ⁇ p0, closed loop index ⁇ associated with a specific TCI state is used.
  • This TCI state may be either the UL or joint UL/DL TCI state with the lowest index among all the TCI states configured in a RRC, or the TCI state associated with the lowest TCI code point activated by the last TCI state activation MAC-CE.
  • UL TCI state 0 is associated with PUCCH power control parameters ⁇ p0_0
  • closed loop index 0 ⁇
  • UL TCI state 1 is associated with PUCCH power control parameters ⁇ p0_1, closed loop index 1 ⁇
  • UL TCI state 2 is associated with PUCCH power control parameters ⁇ p0_2, closed loop index 2 ⁇ .
  • TCI states Two TCI states (e.g., state 1 and state 2) are activated by MAC-CE, where state 1 is activated with codepoint 0, and state 2 is activated with codepoint 1.
  • state 1 is activated with codepoint 0
  • state 2 is activated with codepoint 1.
  • the power control parameters associated with the TCI state with the lowest TCI index e.g., TCI state 0
  • ⁇ p0_0 closed loop index 0 ⁇ is used for PUCCH during beam failure recovery.
  • ⁇ p0_1 closed loop index 1 ⁇ is used for PUCCH during beam failure recovery.
  • a specific p0 from RRC configured p0 values in p0-Set are used, and a specific closed loop index value is used.
  • RRC is used to configure a specific pair of value ⁇ p0, closed loop index ⁇ for use by PUCCH during beam failure recovery.
  • a UE after a UE receives a beam failure recovery response from a network, if the network signals to the UE a joint TCI state or UL TCI state before scheduling the UE to transmit a PUSCH, the UE may use the PUSCH power control parameters associated with the TCI state for the transmission. But if the network schedules the UE to send a PUSCH before the UE receives a UL TCI state (e.g., the DCI scheduling PUSCH may not contain a TCI state indicator) , the UE needs to determine the set of power control parameters including the PL-RS, and other parameters ⁇ p0, alpha, closed loop index ⁇ to use for the PUSCH transmission.
  • the value p0 refers to the UE specific part (P O_UE_PUSCH, b, f, c (j) ) .
  • the parameters ⁇ p0, alpha, closed loop index ⁇ , p0 and alpha are determined together by the parameter q u , and the closed loop index is l. They can be determined with a few options.
  • the ⁇ p0, alpha, closed loop index ⁇ associated with a specific TCI state are used.
  • This TCI state may be either the UL or joint UL/DL TCI state with the lowest index among all the TCI states configured in the RRC, or the TCI state associated with the lowest TCI code point activated by the last TCI state activation MAC-CE.
  • UL TCI state 0 is associated with PUSCH power control parameters ⁇ p0_0, alpha_0, closed loop index 0 ⁇
  • UL TCI state 1 is associated with PUSCH power control parameters ⁇ p0_1, alpha_1, closed loop index 1 ⁇
  • UL TCI state 2 is associated with PUSCH power control parameters ⁇ p0_2, alpha_2, closed loop index 2 ⁇ .
  • Two TCI states e.g., state 1 and state 2 are activated by MAC-CE, where state 1 is activated with codepoint 0, and state 2 is activated with codepoint 1.
  • ⁇ p0_0, alpha_0, closed loop index 0 ⁇ is used for PUSCH during beam failure recovery. If the power control parameters associated with the TCI state activated as the lowest TCI codepoint by MAC-CE are used, ⁇ p0_1, alpha_1, closed loop index 1 ⁇ is used for PUSCH during beam failure recovery.
  • a specific p0 and alpha from the RRC configured p0 and alpha values in a specific p0-PUSCH-AlphaSet are used, and a specific closed loop index value is used.
  • RRC is used to configure a specific pair of values ⁇ p0, alpha, closed loop index ⁇ for use by PUCCH during beam failure recovery.
  • SRS may be used.
  • a UE will not transmit SRS during a BFR process, thus there is no need to define a set of power control parameters for SRS for BFR.
  • FIG. 4 is a schematic block diagram illustrating one embodiment of a system 400 for power control parameters corresponding to beam failure recovery.
  • the system 400 includes a UE 402 and a base station 404.
  • Each of the communications illustrated in the system 400 may include one or more messages.
  • the base station 404 transmits a first number of symbols to the UE 402.
  • the first number of symbols include a beam failure recovery response, and the first number of symbols corresponds to a last symbol of a PDCCH transmission.
  • the UE 402 After receiving the first number of symbols and before receiving an UL TCI or a joint TCI state indication, the UE 402 determines 408 power control parameters to use for UL transmission of a channel.
  • the UE transmits the UL transmission on the channel to the base station 404 based on the determined power control parameters.
  • Figure 5 is a flow chart diagram illustrating one embodiment of a method 500 for power control parameters corresponding to beam failure recovery.
  • the method 500 is performed by an apparatus, such as the remote unit 102.
  • the method 500 may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.
  • the method 500 includes receiving 502 a first number of symbols from a base station.
  • the first number of symbols include a beam failure recovery response, and the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission.
  • the method 500 includes, after receiving the first number of symbols and before receiving an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, determining 504 power control parameters to use for UL transmission of a channel.
  • the method 500 includes transmitting 506 the UL transmission on the channel to the base station based on the determined power control parameters.
  • the power control parameters are taken from a set of power control parameters associated with an UL TCI state or joint UL and downlink (DL) TCI state having a lowest index.
  • the power control parameters are taken from a TCI state activated with a lowest TCI codepoint signaled in a most recent TCI state activation/deactivation medium access control control element (MAC-CE) .
  • the power control parameters comprise a p0 and alpha combination having a lowest index in a set of p0 and alpha combinations, and the power control parameters comprise a closed loop index having a value of 0.
  • the power control parameters comprise a p0, an alpha, and a closed loop index
  • the power control parameters are configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • a pathloss reference signal (RS) of the power control parameters is the same as a new beam reported to the base station during beam failure recovery.
  • the channel is a physical uplink shared channel (PUSCH)
  • the power control parameters include a pathloss RS, a p0, an alpha, and a closed loop index.
  • the channel is a physical uplink control channel (PUCCH)
  • the power control parameters include a pathloss RS, a p0, and a closed loop index.
  • Figure 6 is a flow chart diagram illustrating another embodiment of a method 600 for power control parameters corresponding to beam failure recovery.
  • the method 600 is performed by an apparatus, such as the network unit 104.
  • the method 600 may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.
  • the method 600 includes transmitting 602 a first number of symbols to a user equipment (UE) .
  • the first number of symbols include a beam failure recovery response, the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission, and, after transmitting the first number of symbols and before transmitting an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, power control parameters for the UE to use for UL transmission of a channel are determined.
  • the method 600 includes receiving 604 the UL transmission from the UE on the channel based on the determined power control parameters.
  • the power control parameters are taken from a set of power control parameters associated with an UL TCI state or joint UL and downlink (DL) TCI state having a lowest index.
  • the power control parameters are taken from a TCI state activated with a lowest TCI codepoint signaled in a most recent TCI state activation/deactivation medium access control control element (MAC-CE) .
  • the power control parameters comprise a p0 and alpha combination having a lowest index in a set of p0 and alpha combinations, and the power control parameters comprise a closed loop index having a value of 0.
  • the power control parameters comprise a p0, an alpha, and a closed loop index
  • the power control parameters are configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • a pathloss reference signal (RS) of the power control parameters is the same as a new beam reported to the base station during beam failure recovery.
  • the channel is a physical uplink shared channel (PUSCH)
  • the power control parameters include a pathloss RS, a p0, an alpha, and a closed loop index.
  • the channel is a physical uplink control channel (PUCCH)
  • the power control parameters include a pathloss RS, a p0, and a closed loop index.
  • a method of a user equipment comprises: receiving a first number of symbols from a base station, wherein the first number of symbols comprises a beam failure recovery response, and the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission; after receiving the first number of symbols and before receiving an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, determining power control parameters to use for UL transmission of a channel; and transmitting the UL transmission on the channel to the base station based on the determined power control parameters.
  • UL uplink
  • TCI transmission configuration indicator
  • the power control parameters are taken from a set of power control parameters associated with an UL TCI state or joint UL and downlink (DL) TCI state having a lowest index.
  • the power control parameters are taken from a TCI state activated with a lowest TCI codepoint signaled in a most recent TCI state activation/deactivation medium access control control element (MAC-CE) .
  • MAC-CE medium access control control element
  • the power control parameters comprise a p0 and alpha combination having a lowest index in a set of p0 and alpha combinations, and the power control parameters comprise a closed loop index having a value of 0.
  • the power control parameters comprise a p0, an alpha, and a closed loop index, and the power control parameters are configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • a pathloss reference signal (RS) of the power control parameters is the same as a new beam reported to the base station during beam failure recovery.
  • the channel is a physical uplink shared channel (PUSCH)
  • the power control parameters include a pathloss RS, a p0, an alpha, and a closed loop index.
  • the channel is a physical uplink control channel (PUCCH)
  • the power control parameters include a pathloss RS, a p0, and a closed loop index.
  • an apparatus comprises a user equipment (UE) .
  • the apparatus further comprises: a receiver that receives a first number of symbols from a base station, wherein the first number of symbols comprises a beam failure recovery response, and the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission; a processor that, after receiving the first number of symbols and before receiving an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, determines power control parameters to use for UL transmission of a channel; and a transmitter that transmits the UL transmission on the channel to the base station based on the determined power control parameters.
  • UL uplink
  • TCI transmission configuration indicator
  • a transmitter that transmits the UL transmission on the channel to the base station based on the determined power control parameters.
  • the power control parameters are taken from a set of power control parameters associated with an UL TCI state or joint UL and downlink (DL) TCI state having a lowest index.
  • the power control parameters are taken from a TCI state activated with a lowest TCI codepoint signaled in a most recent TCI state activation/deactivation medium access control control element (MAC-CE) .
  • MAC-CE medium access control control element
  • the power control parameters comprise a p0 and alpha combination having a lowest index in a set of p0 and alpha combinations, and the power control parameters comprise a closed loop index having a value of 0.
  • the power control parameters comprise a p0, an alpha, and a closed loop index, and the power control parameters are configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • a pathloss reference signal (RS) of the power control parameters is the same as a new beam reported to the base station during beam failure recovery.
  • the channel is a physical uplink shared channel (PUSCH)
  • the power control parameters include a pathloss RS, a p0, an alpha, and a closed loop index.
  • the channel is a physical uplink control channel (PUCCH)
  • the power control parameters include a pathloss RS, a p0, and a closed loop index.
  • a method of a base station comprises: transmitting a first number of symbols to a user equipment (UE) , wherein the first number of symbols comprises a beam failure recovery response, the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission, and, after transmitting the first number of symbols and before transmitting an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, power control parameters for the UE to use for UL transmission of a channel are determined; and receiving the UL transmission from the UE on the channel based on the determined power control parameters.
  • UE user equipment
  • TCI transmission configuration indicator
  • the power control parameters are taken from a set of power control parameters associated with an UL TCI state or joint UL and downlink (DL) TCI state having a lowest index.
  • the power control parameters are taken from a TCI state activated with a lowest TCI codepoint signaled in a most recent TCI state activation/deactivation medium access control control element (MAC-CE) .
  • MAC-CE medium access control control element
  • the power control parameters comprise a p0 and alpha combination having a lowest index in a set of p0 and alpha combinations, and the power control parameters comprise a closed loop index having a value of 0.
  • the power control parameters comprise a p0, an alpha, and a closed loop index, and the power control parameters are configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • a pathloss reference signal (RS) of the power control parameters is the same as a new beam reported to the base station during beam failure recovery.
  • the channel is a physical uplink shared channel (PUSCH)
  • the power control parameters include a pathloss RS, a p0, an alpha, and a closed loop index.
  • the channel is a physical uplink control channel (PUCCH)
  • the power control parameters include a pathloss RS, a p0, and a closed loop index.
  • an apparatus comprises a base station.
  • the apparatus further comprises: a transmitter that transmits a first number of symbols to a user equipment (UE) , wherein the first number of symbols comprises a beam failure recovery response, the first number of symbols corresponds to a last symbol of a physical downlink control channel (PDCCH) transmission, and, after transmitting the first number of symbols and before transmitting an uplink (UL) transmission configuration indicator (TCI) or a joint TCI state indication, power control parameters for the UE to use for UL transmission of a channel are determined; and a receiver that receives the UL transmission from the UE on the channel based on the determined power control parameters.
  • UE user equipment
  • TCI transmission configuration indicator
  • the power control parameters are taken from a set of power control parameters associated with an UL TCI state or joint UL and downlink (DL) TCI state having a lowest index.
  • the power control parameters are taken from a TCI state activated with a lowest TCI codepoint signaled in a most recent TCI state activation/deactivation medium access control control element (MAC-CE) .
  • MAC-CE medium access control control element
  • the power control parameters comprise a p0 and alpha combination having a lowest index in a set of p0 and alpha combinations, and the power control parameters comprise a closed loop index having a value of 0.
  • the power control parameters comprise a p0, an alpha, and a closed loop index, and the power control parameters are configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • a pathloss reference signal (RS) of the power control parameters is the same as a new beam reported to the base station during beam failure recovery.
  • the channel is a physical uplink shared channel (PUSCH)
  • the power control parameters include a pathloss RS, a p0, an alpha, and a closed loop index.
  • the channel is a physical uplink control channel (PUCCH)
  • the power control parameters include a pathloss RS, a p0, and a closed loop index.

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

Abstract

La présente divulgation concerne des appareils, des procédés et des systèmes relatifs à des paramètres de commande de puissance correspondant à une reprise sur défaillance de faisceau. Un procédé (500) inclut la réception (502) d'un premier nombre de symboles en provenance d'une station de base. Le premier nombre de symboles inclut une réponse de reprise sur défaillance de faisceau, et le premier nombre de symboles correspond à un dernier symbole d'une transmission de canal physique de commande de liaison descendante (PDCCH). Le procédé (500) inclut, après la réception du premier nombre de symboles et avant la réception d'un indicateur de configuration de transmission (TCI) en liaison montante ou d'une indication conjointe d'état d'indicateur TCI, la détermination (504) de paramètres de commande de puissance à utiliser pour une transmission en liaison montante d'un canal. Le procédé (500) inclut la transmission (506) de la transmission en liaison montante sur le canal à la station de base sur la base des paramètres de commande de puissance déterminés.
PCT/CN2022/070443 2022-01-06 2022-01-06 Paramètres de commande de puissance correspondant à une reprise sur défaillance de faisceau WO2023130297A1 (fr)

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US20200119799A1 (en) * 2018-10-11 2020-04-16 Lenovo (Singapore) Pte. Ltd. Method and Apparatus for Determining Physical Uplink Channel Power Control Parameter Values for Use After a Beam Failure Recovery
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