WO2021203404A1 - Indicateur de configuration de transmission de liaison montante et mise à jour de paramètres de commande de puissance - Google Patents

Indicateur de configuration de transmission de liaison montante et mise à jour de paramètres de commande de puissance Download PDF

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Publication number
WO2021203404A1
WO2021203404A1 PCT/CN2020/084153 CN2020084153W WO2021203404A1 WO 2021203404 A1 WO2021203404 A1 WO 2021203404A1 CN 2020084153 W CN2020084153 W CN 2020084153W WO 2021203404 A1 WO2021203404 A1 WO 2021203404A1
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WIPO (PCT)
Prior art keywords
command
mac
uplink
tci
mapped
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PCT/CN2020/084153
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English (en)
Inventor
Fang Yuan
Yan Zhou
Tao Luo
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Qualcomm Incorporated
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Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/084153 priority Critical patent/WO2021203404A1/fr
Publication of WO2021203404A1 publication Critical patent/WO2021203404A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop 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
    • H04W52/06—TPC algorithms
    • H04W52/10—Open loop 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
    • H04W52/06—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
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the technology discussed below relates generally to wireless communication networks, and more particularly, to uplink transmission of transmission configuration indicator and power control updates.
  • a base station and user equipment may utilize beamforming to compensate for high path loss and short range.
  • Beamforming is a signal processing technique used with an antenna array module for directional signal transmission and/or reception.
  • Each antenna in the antenna array module transmits a signal that is combined with other signals of other antennas of the same array in such a way that signals at particular angles experience constructive interference while others experience destructive interference.
  • various reference signals may be transmitted, including reference signals that include information related to beam configuration and power control parameters defined for the UE.
  • reference signals may carry a transmission configuration indicator (TCI) state that may provide certain beam configuration parameters.
  • TCI transmission configuration indicator
  • a method for wireless communication at a base station in a wireless communication network may include transmitting a downlink medium access control (MAC) control element (MAC-CE) command to a user equipment (UE) .
  • the downlink MAC-CE command may be configured to define a transmission configuration indicator (TCI) mapping that maps one or more TCI state identifiers to downlink control information (DCI) codepoints to obtain a corresponding number of mapped codepoints.
  • TCI transmission configuration indicator
  • the method may also include receiving an uplink MAC-CE command from the UE, the uplink MAC-CE command including a mapped codepoint (e.g., selected by the UE) .
  • the base station may then determine the TCI state and/or a power control parameter set corresponding to the mapped codepoint using the TCI mapping.
  • a base station in a wireless communication network has a wireless transceiver a memory, and a processor communicatively coupled to the wireless transceiver and the memory.
  • the processor may be configured to transmit a downlink MAC-CE command to a UE.
  • the downlink MAC-CE command may be configured to define a TCI mapping that maps one or more TCI state identifiers to DCI codepoints to obtain a corresponding number of mapped codepoints.
  • the processor may be further configured to receive an uplink MAC-CE command from the UE, the uplink MAC-CE command including a mapped codepoint (e.g., selected by the UE) , and determine TCI state or a power control parameter set corresponding to the mapped codepoint using the TCI mapping.
  • a mapped codepoint e.g., selected by the UE
  • a computer-readable medium stores computer executable code.
  • the code when executed by a processor may cause the processor to transmit a downlink MAC-CE command to a UE, the downlink MAC-CE command being configured to define a TCI mapping that maps one or more TCI state identifiers to DCI codepoints to obtain a corresponding number of mapped codepoints.
  • the code may further cause the processor to receive an uplink MAC-CE command from the UE, the uplink MAC-CE command including a mapped codepoint, and determine TCI state or a power control parameter set corresponding to the mapped codepoint using the TCI mapping.
  • a base station in a wireless communication network includes means for transmitting MAC-CE commands to a UE, the means for transmitting MAC-CE commands being configured to transmit a downlink MAC-CE command that defines a TCI mapping that maps one or more TCI state identifiers to DCI codepoints to obtain a corresponding number of mapped codepoints.
  • the base station may include means for receiving MAC-CE commands from the UE, the means for receiving MAC-CE commands being configured to receive an uplink MAC-CE command that includes a mapped codepoint.
  • the base station may include means for determining TCI state or a power control parameter set corresponding to the mapped codepoint using the TCI mapping.
  • the TCI mapping and/or mapped codepoint may be used to determine a TCI state identifier and/or to index a power control parameter set identifier in the uplink MAC-CE command.
  • the uplink MAC-CE command may be received from a physical uplink shared channel.
  • the uplink MAC-CE command may be received from a physical uplink control channel, and a resource identifier for a resource in the physical uplink control channel that carries the mapped codepoint.
  • the uplink MAC-CE command may be received in a sounding reference signal and a resource set identifier for a set of sounding reference signal resources used by the uplink MAC-CE command.
  • the TCI mapping maps up to eight TCI state identifiers to an eight-bit field in the DCI.
  • a method for wireless communication at a UE in a wireless communication network includes receiving a downlink MAC-CE command from a base station, the downlink MAC-CE command providing mappings of one or more TCI state identifiers to a corresponding number of DCI codepoints, thereby defining one or more mapped codepoints, configuring a TCI mapping to include the mappings provided in the downlink MAC-CE command, and transmitting a mapped codepoint in an uplink MAC-CE command to the base station, wherein the mapped codepoint indicates a TCI state identifier or a power control parameter set identifier.
  • a UE in a wireless communication network has a wireless transceiver, a memory, and a processor communicatively coupled to the wireless transceiver and the memory.
  • the processor may be configured to receive a downlink MAC-CE command from a base station, the downlink MAC-CE command providing mappings of one or more TCI state identifiers to a corresponding number of DCI codepoints, thereby defining one or more mapped codepoints, configure a TCI mapping to include the mappings provided in the downlink MAC-CE command, and transmit a mapped codepoint in an uplink MAC-CE command to the base station, wherein the mapped codepoint indicates a TCI state identifier or a power control parameter set identifier.
  • a computer-readable medium stores computer executable code.
  • the code when executed by a processor may cause the processor to receive a downlink MAC-CE command from a base station, the downlink MAC-CE command providing mappings of one or more TCI state identifiers to a corresponding number of DCI codepoints, thereby defining one or more mapped codepoints, configure a TCI mapping to include the mappings provided in the downlink MAC-CE command, and transmit a mapped codepoint in an uplink MAC-CE command to the base station, wherein the mapped codepoint indicates a TCI state identifier or a power control parameter set identifier.
  • a UE in a wireless communication network includes means for receiving MAC-CE commands from a base station, the MAC-CE commands including a downlink MAC-CE command that provides mappings of one or more TCI state identifiers to a corresponding number of DCI codepoints, thereby defining one or more mapped codepoints, means for configuring a TCI mapping to include the mappings provided in the downlink MAC-CE command, and means for transmitting MAC-CE commands, configured to transmit an uplink MAC-CE command to the base station.
  • the uplink MAC-CE command may include a mapped codepoint that indicates a TCI state identifier or a power control parameter set identifier.
  • the uplink MAC-CE command may be transmitted to indicate the TCI state identifier and/or to indicate the power control parameter set identifier.
  • the uplink MAC-CE command may be transmitted in a physical uplink shared channel.
  • the uplink MAC-CE command may be transmitted in a physical uplink shared channel with a resource identifier that identifies a resource that carries the mapped codepoint.
  • the uplink MAC-CE command may be transmitted in a sounding reference signal with a resource set identifier that identifies a set of resources used by the uplink MAC-CE command.
  • the TCI mapping maps up to eight TCI state identifiers to an eight-bit field in the DCI.
  • FIG. 1 is a schematic illustration of a wireless communication system according to some aspects.
  • FIG. 2 is a conceptual illustration of an example of a radio access network according to some aspects.
  • FIG. 3 is a diagram illustrating an example of a frame structure for use in a radio access network according to some aspects.
  • FIG. 4 is a block diagram illustrating a wireless communication system supporting beamforming and/or multiple-input multiple-output (MIMO) communication according to some aspects.
  • MIMO multiple-input multiple-output
  • FIG. 5 is a diagram illustrating an example of communication between a base station and a UE using beamforming according to some aspects.
  • FIG. 6 is a diagram illustrating an example of associations between uplink TCI state identifiers and uplink beam information.
  • FIG. 7 illustrates an example of a MAC-CE command that can be used to activate or deactivate TCI states that are to be mapped to codepoints of DCI.
  • FIG. 8 illustrates an example of a power control parameter set.
  • FIG. 9 illustrates MAC-CE commands that may be used for separately indicating uplink TCI state and power control updates for an uplink shared channel in accordance with certain aspects of this disclosure.
  • FIG. 10 illustrates a MAC-CE command that may be used for individual power control parameter updates when uplink TCI state and power control updates for an uplink shared channel are separately indicated in accordance with certain aspects of this disclosure.
  • FIG. 11 illustrates a MAC-CE command that may be used for joint indicating of uplink TCI state and power control updates for an uplink control channel in accordance with certain aspects of this disclosure.
  • FIG. 12 illustrates MAC-CE commands that may be used for separately indicating uplink TCI state and power control updates using an uplink control channel in accordance with certain aspects of this disclosure.
  • FIG. 13 illustrates a MAC-CE command that may be used for joint indicating of uplink TCI state and power control updates using a reference signal in accordance with certain aspects of this disclosure.
  • FIG. 14 illustrates MAC-CE commands that may be used for separately indicating uplink TCI state and power control updates using a reference signal in accordance with certain aspects of this disclosure.
  • FIG. 15 is a block diagram illustrating an example of a hardware implementation for a base station employing a processing system according to some aspects.
  • FIG. 16 is a block diagram illustrating an example of a hardware implementation for a UE employing a processing system according to some aspects.
  • FIG. 17 is a flow chart of an exemplary method for wireless communication at a base station according to some aspects.
  • FIG. 18 is a flow chart of an exemplary method for wireless communication at a UE according to some aspects.
  • the electromagnetic spectrum is often subdivided by various authors or entities into different classes, bands, channels, or the like, based on frequency/wavelength.
  • two initial operating bands have been identified as frequency range designations FR1 (410 MHz-7125 MHz) and FR2 (24250 MHz –52600 MHz) .
  • FR1 is often referred to (interchangeably) as a Sub-6 GHz band in various documents and articles regarding 5G NR topics.
  • a similar nomenclature issue sometimes occurs with regard to FR2 in various documents and articles regarding 5G NR topics.
  • FR2 While a portion of FR2 is less than 30 GHz ( ⁇ 30000 MHz) , FR2 is often referred to (interchangeably) as a millimeter wave band. However, some authors/entities tend to define wireless signals with wavelengths between 1-10 millimeters as falling within a millimeter wave band (30 GHz –300 GHz) .
  • sub-6 GHz if used herein by way of example may represent all or part of FR1 for 5G NR.
  • millimeter wave as used herein by way of example may represent all or part of FR2 for 5G NR and/or all or part of a 30 GHz-300 GHz waveband.
  • sub-6 GHz and millimeter wave, are intended to represent modifications to such example frequency bands that may occur do to author/entity decisions regarding wireless communications, e.g., as presented by example herein.
  • Implementations may range a spectrum from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregate, distributed, or OEM devices or systems incorporating one or more aspects of the described innovations.
  • devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described embodiments.
  • transmission and reception of wireless signals necessarily includes a number of components for analog and digital purposes (e.g., hardware components including antenna, RF-chains, power amplifiers, modulators, buffer, processor (s) , interleaver, adders/summers, etc. ) .
  • innovations described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc. of varying sizes, shapes and constitution.
  • the various concepts presented throughout this disclosure may be implemented across a broad variety of telecommunication systems, network architectures, and communication standards.
  • the wireless communication system 100 includes three interacting domains: a core network 102, a radio access network (RAN) 104, and a user equipment (UE) 106.
  • the UE 106 may be enabled to carry out data communication with an external data network 110, such as (but not limited to) the Internet.
  • the RAN 104 may implement any suitable wireless communication technology or technologies to provide radio access to the UE 106.
  • the RAN 104 may operate according to 3rd Generation Partnership Project (3GPP) New Radio (NR) specifications, often referred to as 5G.
  • 3GPP 3rd Generation Partnership Project
  • NR New Radio
  • the RAN 104 may operate under a hybrid of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, often referred to as LTE.
  • eUTRAN Evolved Universal Terrestrial Radio Access Network
  • the 3GPP refers to this hybrid RAN as a next-generation RAN, or NG-RAN.
  • NG-RAN next-generation RAN
  • a base station is a network element in a radio access network responsible for radio transmission and reception in one or more cells to or from a UE.
  • a base station may variously be referred to by those skilled in the art as a base transceiver station (BTS) , a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , an access point (AP) , a Node B (NB) , an eNode B (eNB) , a gNode B (gNB) , or some other suitable terminology.
  • BTS base transceiver station
  • BSS basic service set
  • ESS extended service set
  • AP access point
  • NB Node B
  • eNB eNode B
  • gNB gNode B
  • the radio access network 104 is further illustrated supporting wireless communication for multiple mobile apparatuses.
  • a mobile apparatus may be referred to as user equipment (UE) in 3GPP standards, but may also be referred to by those skilled in the art as a mobile station (MS) , a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal (AT) , a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology.
  • a UE may be an apparatus that provides a user with access to network services.
  • a “mobile” apparatus need not necessarily have a capability to move, and may be stationary.
  • the term mobile apparatus or mobile device broadly refers to a diverse array of devices and technologies.
  • UEs may include a number of hardware structural components sized, shaped, and arranged to help in communication; such components can include antennas, antenna array modules, RF chains, amplifiers, one or more processors, etc. electrically coupled to each other.
  • a mobile apparatus examples include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal computer (PC) , a notebook, a netbook, a smartbook, a tablet, a personal digital assistant (PDA) , and a broad array of embedded systems, e.g., corresponding to an “Internet of Things” (IoT) .
  • IoT Internet of Things
  • a mobile apparatus may additionally be an automotive or other transportation vehicle, a remote sensor or actuator, a robot or robotics device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-copter, a quad-copter, a remote control device, a consumer and/or wearable device, such as eyewear, a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., MP3 player) , a camera, a game console, etc.
  • GPS global positioning system
  • a mobile apparatus may additionally be a digital home or smart home device such as a home audio, video, and/or multimedia device, an appliance, a vending machine, intelligent lighting, a home security system, a smart meter, etc.
  • a mobile apparatus may additionally be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device controlling electric power (e.g., a smart grid) , lighting, water, etc. ; an industrial automation and enterprise device; a logistics controller; agricultural equipment; military defense equipment, vehicles, aircraft, ships, and weaponry, etc.
  • a mobile apparatus may provide for connected medicine or telemedicine support, i.e., health care at a distance.
  • Telehealth devices may include telehealth monitoring devices and telehealth administration devices, whose communication may be given preferential treatment or prioritized access over other types of information, e.g., in terms of prioritized access for transport of critical service data, and/or relevant QoS for transport of critical service data.
  • Wireless communication between a RAN 104 and a UE 106 may be described as utilizing an air interface.
  • Transmissions over the air interface from a base station (e.g., base station 108) to one or more UEs (e.g., UE 106) may be referred to as downlink (DL) transmission.
  • DL downlink
  • the term downlink may refer to a point-to-multipoint transmission originating at a scheduling entity (described further below; e.g., base station 108) .
  • Another way to describe this scheme may be to use the term broadcast channel multiplexing.
  • Uplink Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) may be referred to as uplink (UL) transmissions.
  • UL uplink
  • the term uplink may refer to a point-to-point transmission originating at a scheduled entity (described further below; e.g., UE 106) .
  • a scheduling entity e.g., a base station 108 allocates resources for communication among some or all devices and equipment within its service area or cell.
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communication, UEs 106, which may be scheduled entities, may utilize resources allocated by the scheduling entity 108.
  • Base stations 108 are not the only entities that may function as scheduling entities. That is, in some examples, a UE may function as a scheduling entity, scheduling resources for one or more scheduled entities (e.g., one or more other UEs) . And as discussed more below, UEs may communicate directly with other UEs in peer-to-peer fashion and/or in relay configuration.
  • a scheduling entity 108 may broadcast downlink traffic 112 to one or more scheduled entities 106.
  • the scheduling entity 108 is a node or device responsible for scheduling traffic in a wireless communication network, including the downlink traffic 112 and, in some examples, uplink traffic 116 from one or more scheduled entities 106 to the scheduling entity 108.
  • the scheduled entity 106 is a node or device that receives downlink control information 114, including but not limited to scheduling information (e.g., a grant) , synchronization or timing information, or other control information from another entity in the wireless communication network such as the scheduling entity 108.
  • the uplink and/or downlink control information and/or traffic information may be time-divided into frames, subframes, slots, and/or symbols.
  • a symbol may refer to a unit of time that, in an orthogonal frequency division multiplexed (OFDM) waveform, carries one resource element (RE) per sub-carrier.
  • a slot may carry 7 or 14 OFDM symbols.
  • a subframe may refer to a duration of 1ms. Multiple subframes or slots may be grouped together to form a single frame or radio frame.
  • OFDM orthogonal frequency division multiplexed
  • a slot may carry 7 or 14 OFDM symbols.
  • a subframe may refer to a duration of 1ms. Multiple subframes or slots may be grouped together to form a single frame or radio frame.
  • these definitions are not required, and any suitable scheme for organizing waveforms may be utilized, and various time divisions of the waveform may have any suitable duration.
  • base stations 108 may include a backhaul interface for communication with a backhaul portion 120 of the wireless communication system.
  • the backhaul 120 may provide a link between a base station 108 and the core network 102.
  • a backhaul network may provide interconnection between the respective base stations 108.
  • Various types of backhaul interfaces may be employed, such as a direct physical connection, a virtual network, or the like using any suitable transport network.
  • the core network 102 may be a part of the wireless communication system 100, and may be independent of the radio access technology used in the RAN 104.
  • the core network 102 may be configured according to 5G standards (e.g., 5GC) .
  • the core network 102 may be configured according to a 4G evolved packet core (EPC) , or any other suitable standard or configuration.
  • 5G standards e.g., 5GC
  • EPC 4G evolved packet core
  • FIG. 2 a schematic illustration of a RAN 200 is provided.
  • the RAN 200 may be the same as the RAN 104 described above and illustrated in FIG. 1.
  • the geographic area covered by the RAN 200 may be divided into cellular regions (cells) that can be uniquely identified by a user equipment (UE) based on an identification broadcasted from one access point or base station.
  • FIG. 2 illustrates macrocells 202, 204, and 206, and a small cell 208, each of which may include one or more sectors (not shown) .
  • a sector is a sub-area of a cell. All sectors within one cell are served by the same base station.
  • a radio link within a sector can be identified by a single logical identification belonging to that sector.
  • the multiple sectors within a cell can be formed by groups of antennas with each antenna responsible for communication with UEs in a portion of the cell.
  • FIG. 2 two base stations 210 and 212 are shown in cells 202 and 204; and a third base station 214 is shown controlling a remote radio head (RRH) 216 in cell 206. That is, a base station can have an integrated antenna or can be connected to an antenna or RRH by feeder cables.
  • the cells 202, 204, and 126 may be referred to as macrocells, as the base stations 210, 212, and 214 support cells having a large size.
  • a base station 218 is shown in the small cell 208 (e.g., a microcell, picocell, femtocell, home base station, home Node B, home eNode B, etc.
  • the cell 208 may be referred to as a small cell, as the base station 218 supports a cell having a relatively small size.
  • Cell sizing can be done according to system design as well as component constraints.
  • the radio access network 200 may include any number of wireless base stations and cells. Further, a relay node may be deployed to extend the size or coverage area of a given cell.
  • the base stations 210, 212, 214, 218 provide wireless access points to a core network for any number of mobile apparatuses. In some examples, the base stations 210, 212, 214, and/or 218 may be the same as the base station/scheduling entity 108 described above and illustrated in FIG. 1.
  • the cells may include UEs that may be in communication with one or more sectors of each cell.
  • each base station 210, 212, 214, and 218 may be configured to provide an access point to a core network 102 (see FIG. 1) for all the UEs in the respective cells.
  • UEs 222 and 224 may be in communication with base station 210; UEs 226 and 228 may be in communication with base station 212; UEs 230 and 232 may be in communication with base station 214 by way of RRH 216; and UE 234 may be in communication with base station 218.
  • the UEs 222, 224, 226, 228, 230, 232, 234, 238, 240, and/or 242 may be the same as the UE/scheduled entity 106 described above and illustrated in FIG. 1.
  • an unmanned aerial vehicle (UAV) 220 which may be a drone or quadcopter, can be a mobile network node and may be configured to function as a UE.
  • the UAV 220 may operate within cell 202 by communicating with base station 210.
  • sidelink signals may be used between UEs without necessarily relying on scheduling or control information from a base station.
  • two or more UEs e.g., UEs 226 and 228, may communicate with each other using sidelink signals 227 without relaying that communication through a base station (e.g., base station 212) .
  • the sidelink signals 227 include sidelink traffic and sidelink control.
  • UE 238 is illustrated communicating with UEs 240 and 242.
  • the UE 238 may function as a scheduling entity or a primary/transmitting sidelink device, and UEs 240 and 242 may each function as a scheduled entity or a non-primary (e.g., secondary/receiving) sidelink device.
  • a UE may function as a scheduling entity or scheduled entity in a device-to-device (D2D) , peer-to-peer (P2P) , vehicle-to-vehicle (V2V) network, vehicle-to-everything (V2X) and/or in a mesh network.
  • D2D device-to-device
  • P2P peer-to-peer
  • V2V vehicle-to-vehicle
  • V2X vehicle-to-everything
  • UEs 240 and 242 may optionally communicate directly with one another in addition to communicating with the scheduling entity 238.
  • a scheduling entity and one or more scheduled entities may communicate utilizing the scheduled resources.
  • the air interface in the radio access network 200 may utilize one or more multiplexing and multiple access algorithms to enable simultaneous communication of the various devices.
  • 5G NR specifications provide multiple access for UL transmissions from UEs 222 and 224 to base station 210, and for multiplexing for DL transmissions from base station 210 to one or more UEs 222 and 224, utilizing orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) .
  • OFDM orthogonal frequency division multiplexing
  • CP cyclic prefix
  • 5G NR specifications provide support for discrete Fourier transform-spread-OFDM (DFT-s-OFDM) with a CP (also referred to as single-carrier FDMA (SC-FDMA) ) .
  • DFT-s-OFDM discrete Fourier transform-spread-OFDM
  • SC-FDMA single-carrier FDMA
  • multiplexing and multiple access are not limited to the above schemes, and may be provided utilizing time division multiple access (TDMA) , code division multiple access (CDMA) , frequency division multiple access (FDMA) , sparse code multiple access (SCMA) , resource spread multiple access (RSMA) , or other suitable multiple access schemes.
  • multiplexing DL transmissions from the base station 210 to UEs 222 and 224 may be provided utilizing time division multiplexing (TDM) , code division multiplexing (CDM) , frequency division multiplexing (FDM) , orthogonal frequency division multiplexing (OFDM) , sparse code multiplexing (SCM) , or other suitable multiplexing schemes.
  • the air interface in the radio access network 200 may further utilize one or more duplexing algorithms.
  • Duplex refers to a point-to-point communication link where both endpoints can communicate with one another in both directions.
  • Full duplex means both endpoints can simultaneously communicate with one another.
  • Half duplex means only one endpoint can send information to the other at a time.
  • a full duplex channel generally relies on physical isolation of a transmitter and receiver, and suitable interference cancellation technologies.
  • Full duplex emulation is frequently implemented for wireless links by utilizing frequency division duplex (FDD) or time division duplex (TDD) .
  • FDD frequency division duplex
  • TDD time division duplex
  • transmissions in different directions operate at different carrier frequencies.
  • TDD transmissions in different directions on a given channel are separated from one another using time division multiplexing. That is, at some times the channel is dedicated for transmissions in one direction, while at other times the channel is dedicated for transmissions in the other direction, where the direction may change very rapidly, e.g.,
  • FIG. 3 an expanded view 300 of an exemplary DL subframe 302 is illustrated, showing an OFDM resource grid.
  • time is in the horizontal direction with units of OFDM symbols; and frequency is in the vertical direction with units of subcarriers.
  • the resource grid 304 may be used to schematically represent time–frequency resources for a given antenna port. That is, in a multiple-input-multiple-output (MIMO) implementation with multiple antenna ports available, a corresponding multiple number of resource grids 304 may be available for communication.
  • the resource grid 304 is divided into multiple resource elements (REs) 306.
  • An RE which is 1 subcarrier ⁇ 1 symbol, is the smallest discrete part of the time–frequency grid, and contains a single complex value representing data from a physical channel or signal.
  • each RE may represent one or more bits of information.
  • a block of REs may be referred to as a physical resource block (PRB) or a resource block (RB) 308, which contains any suitable number of consecutive subcarriers in the frequency domain.
  • an RB may include 12 subcarriers, a number independent of the numerology used.
  • an RB may include any suitable number of consecutive OFDM symbols in the time domain.
  • Scheduling of UEs typically involves scheduling one or more resource elements 306 within one or more sub-bands.
  • a UE generally utilizes only a subset of the resource grid 304.
  • an RB may be the smallest unit of resources that can be allocated to a UE.
  • the RB 308 is shown as occupying less than the entire bandwidth of the subframe 302, with some subcarriers illustrated above and below the RB 308.
  • the subframe 302 may have a bandwidth corresponding to any number of one or more RBs 308.
  • the RB 308 is shown as occupying less than the entire duration of the subframe 302, although this is merely one possible example.
  • Each 1 ms subframe 302 may consist of one or multiple adjacent slots.
  • one subframe 302 includes four slots 310, as an illustrative example.
  • a slot may be defined according to a specified number of OFDM symbols with a given cyclic prefix (CP) length.
  • CP cyclic prefix
  • a slot may include 7 or 14 OFDM symbols with a nominal CP.
  • Additional examples may include mini-slots, sometimes referred to as shortened transmission time intervals (TTIs) , having a shorter duration (e.g., one to three OFDM symbols) .
  • TTIs shortened transmission time intervals
  • These mini-slots or shortened transmission time intervals (TTIs) may in some cases be transmitted occupying resources scheduled for ongoing slot transmissions for the same or for different UEs. Any number of resource blocks may be utilized within a subframe or slot.
  • An expanded view of one of the slots 310 illustrates the slot 310 including a control region 312 and a data region 314.
  • the control region 312 may carry control channels
  • the data region 314 may carry data channels.
  • a slot may contain all DL, all UL, or at least one DL portion and at least one UL portion.
  • the structure illustrated in FIG. 3 is merely exemplary in nature, and different slot structures may be utilized, and may include one or more of each of the control region (s) and data region (s) .
  • the various REs 306 within an RB 308 may be scheduled to carry one or more physical channels, including control channels, shared channels, data channels, etc.
  • Other REs 306 within the RB 308 may also carry pilots or reference signals, including but not limited to a demodulation reference signal (DMRS) a control reference signal (CRS) , or a sounding reference signal (SRS) .
  • DMRS demodulation reference signal
  • CRS control reference signal
  • SRS sounding reference signal
  • pilots or reference signals may provide for a receiving device to perform channel estimation of the corresponding channel, which may enable coherent demodulation/detection of the control and/or data channels within the RB 308.
  • the base station may allocate one or more REs 306 (e.g., within a control region 312) to carry DL control information including one or more DL control channels, such as a physical control format indicator channel (PCFICH) ; a physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) ; and/or a physical downlink control channel (PDCCH) , etc., to one or more scheduled entities.
  • the PCFICH provides information to assist a receiving device in receiving and decoding the PDCCH.
  • the PDCCH carries downlink control information (DCI) including but not limited to power control commands, scheduling information, a grant, and/or an assignment of REs for DL and UL transmissions.
  • DCI downlink control information
  • the PHICH carries HARQ feedback transmissions such as an acknowledgment (ACK) or negative acknowledgment (NACK) .
  • HARQ is a technique well-known to those of ordinary skill in the art, wherein the integrity of packet transmissions may be checked at the receiving side for accuracy, e.g., utilizing any suitable integrity checking mechanism, such as a checksum or a cyclic redundancy check (CRC) . If the integrity of the transmission confirmed, an ACK may be transmitted, whereas if not confirmed, a NACK may be transmitted. In response to a NACK, the transmitting device may send a HARQ retransmission, which may implement chase combining, incremental redundancy, etc.
  • the UE may utilize one or more REs 306 to carry UL control information including one or more UL control channels, such as a physical uplink control channel (PUCCH) , to the scheduling entity.
  • UL control information may include a variety of packet types and categories, including pilots, reference signals, and information configured to enable or assist in decoding uplink data transmissions.
  • the control information may include a scheduling request (SR) , i.e., request for the scheduling entity to schedule uplink transmissions.
  • SR scheduling request
  • the scheduling entity may transmit downlink control information that may schedule resources for uplink packet transmissions.
  • UL control information may also include HARQ feedback, channel state feedback (CSF) , or any other suitable UL control information.
  • CSF channel state feedback
  • one or more REs 306 may be allocated for user data traffic. Such traffic may be carried on one or more traffic channels, such as, for a DL transmission, a physical downlink shared channel (PDSCH) ; or for an UL transmission, a physical uplink shared channel (PUSCH) .
  • one or more REs 306 within the data region 314 may be configured to carry system information blocks (SIBs) , carrying information that may enable access to a given cell.
  • SIBs system information blocks
  • Transport channels carry blocks of information called transport blocks (TB) .
  • TBS transport block size
  • MCS modulation and coding scheme
  • the MAC layer can also insert a MAC control element (MAC-CE) into the transport blocks that are carried over the transport channels.
  • MAC-CEs enable MAC layer control command exchange between a UE and the network. For example, MAC-CEs may be used to transmit certain uplink and/or downlink MAC-CE commands.
  • channels or carriers described above in connection with FIGs. 1–3 are not necessarily all of the channels or carriers that may be utilized between a scheduling entity and scheduled entities, and those of ordinary skill in the art will recognize that other channels or carriers may be utilized in addition to those illustrated, such as other traffic, control, and feedback channels.
  • 5G NR networks may support very large operating bandwidths relative to previous generations of cellular networks (e.g., LTE) .
  • LTE Long Term Evolution
  • requiring a UE to operate across the entire bandwidth of a 5G NR network may introduce unnecessary complexities to the operation of the UE and may significantly increase a UE’s power consumption. Therefore, to avoid the need for the operating bandwidth of a UE to match the full bandwidth (also referred to as a carrier bandwidth or a component carrier bandwidth) of a cell in a 5G NR network, 5G NR permits certain UEs to use a bandwidth part (BWP) .
  • BWP bandwidth part
  • a BWP (e.g., a configured frequency band) may allow a UE to operate with a narrower bandwidth (e.g., for wireless transmission and/or reception) than the full bandwidth of a cell.
  • BWPs may allow UEs with different bandwidth capabilities to operate in a cell with smaller instantaneous bandwidths relative to the full bandwidth configured for the cell.
  • a UE may not be required to transmit and or receive outside of the BWP assigned to the UE (also referred to as an active BWP of the UE) .
  • a serving cell may configure a maximum of four DL BWPs and four UL BWPs.
  • a serving cell may configure a maximum of four DL/UL BWP pairs.
  • a serving cell may configure a maximum of 4 UL BWPs.
  • a serving cell may support separate sets of BWP configurations for DL and UL per component carrier (CC) .
  • DL and UL BWPs may be configured separately and independently for each UE-specific serving cell.
  • the numerology of a DL BWP configuration may apply to PDCCH and PDSCH.
  • the numerology of an UL BWP configuration may apply to PUCCH and PUSCH.
  • a serving cell may support a joint set of BWP configurations for DL and UL per CC.
  • DL and UL BWPs may be jointly configured as a pair, with the restriction that the DL/UL BWP pair shares the same center frequency but may be of different bandwidths for each UE-specific serving cell for a UE.
  • the numerology of the DL/UL BWP configuration may apply to PDCCH, PDSCH, PUCCH, and PUSCH.
  • the UE is not expected to retune the center frequency of the channel bandwidth between DL and UL. Supporting the ability to switch a BWP among multiple BWPs is memory consuming, since each BWP requires a whole set of RRC configurations.
  • the scheduling entity and/or scheduled entity may be configured for beamforming and/or multiple-input multiple-output (MIMO) technology.
  • FIG. 4 illustrates an example of a wireless communication system 400 supporting beamforming and/or MIMO.
  • a transmitter 402 includes multiple transmit antennas 404 (e.g., N transmit antennas) and a receiver 406 includes multiple receive antennas 408 (e.g., M receive antennas) .
  • N transmit antennas e.g., N transmit antennas
  • M receive antennas multiple receive antennas
  • Each of the transmitter 402 and the receiver 406 may be implemented, for example, within a scheduling entity or base station, as illustrated in FIGs. 1 and/or 2, a scheduled entity or UE, as illustrated in FIGs. 1 and/or 2, or any other suitable wireless communication device.
  • Spatial multiplexing may be used to transmit different streams of data, also referred to as layers, simultaneously on the same time-frequency resource.
  • the data streams may be transmitted to a single UE to increase the data rate or to multiple UEs to increase the overall system capacity, the latter being referred to as multi-user MIMO (MU-MIMO) .
  • MU-MIMO multi-user MIMO
  • This is achieved by spatially precoding each data stream (i.e., multiplying the data streams with different weighting and phase shifting) and then transmitting each spatially precoded stream through multiple transmit antennas on the downlink.
  • the spatially precoded data streams arrive at the UE (s) with different spatial signatures, which enables each of the UE (s) to recover the one or more data streams destined for that UE.
  • each UE transmits a spatially precoded data stream, which enables the base station to identify the source of each spatially precoded data stream.
  • the number of data streams or layers corresponds to the rank of the transmission.
  • the rank of the MIMO in the wireless communication system 400 is limited by the number of transmit or receive antennas 404 or 408, whichever is lower.
  • the channel conditions at the UE, as well as other considerations, such as the available resources at the base station, may also affect the transmission rank.
  • the rank (and therefore, the number of data streams) assigned to a particular UE on the downlink may be determined based on the rank indicator (RI) transmitted from the UE to the base station.
  • the RI may be determined based on the antenna configuration (e.g., the number of transmit and receive antennas) and a measured signal-to-interference-and-noise ratio (SINR) on each of the receive antennas.
  • SINR signal-to-interference-and-noise ratio
  • the RI may indicate, for example, the number of layers that may be supported under the current channel conditions.
  • the base station may use the RI, along with resource information (e.g., the available resources and amount of data to be scheduled for the UE) , to assign a transmission rank to the UE.
  • resource information e.g., the available resources and amount of data to be scheduled for the UE
  • a rank-2 spatial multiplexing transmission on a 2x2 MIMO antenna configuration will transmit one data stream from each transmit antenna 404.
  • Each data stream reaches each receive antenna 408 along a different signal path 410.
  • the receiver 406 may then reconstruct the data streams using the received signals from each receive antenna 408.
  • Beamforming is a signal processing technique that may be used at the transmitter 402 or receiver 406 to shape or steer an antenna beam (e.g., a transmit/receive beam) along a spatial path between the transmitter 402 and the receiver 406.
  • Beamforming may be achieved by combining the signals communicated via a panel that includes a set of antennas 404 or 408 (e.g., antenna elements of an antenna array module module) such that some of the signals experience constructive interference while others experience destructive interference.
  • the transmitter 402 or receiver 406 may apply amplitude and/or phase offsets to signals transmitted or received from each of the antennas 404 or 408 associated with the transmitter 402 or receiver 406.
  • the base station may transmit a reference signal, such as a synchronization signal block (SSB) , a tracking reference signal (TRS) , or a channel state information reference signal (CSI-RS) , on each of a plurality of beams in a beam-sweeping manner.
  • the UE may measure the reference signal received power (RSRP) on each of the beams and transmit a beam measurement report to the base station indicating the RSRP of each of the measured beams.
  • the base station may then select the serving beam (s) for communication with the UE based on the beam measurement report.
  • the base station may derive the particular beam (s) to communicate with the UE based on uplink measurements of one or more uplink reference signals, such as a sounding reference signal (SRS) .
  • uplink reference signals such as a sounding reference signal (SRS)
  • beamformed signals may be utilized for downlink channels, including the physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH) .
  • downlink channels including the physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH)
  • PDSCH physical downlink shared channel
  • beamformed signals may also be utilized for uplink channels, including the physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) .
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • beamformed signals may also be utilized by enhanced mobile broadband (eMBB) gNBs for sub 6 GHz systems.
  • eMBB enhanced mobile broadband
  • reference signals such as the SSB, TRS, and CSI-RS
  • the TRS may be utilized by a UE to adjust the time/frequency synchronization loop and automatic gain control (AGC) loop, perform Doppler estimation and/or estimate channel parameters for channel estimation of a serving beam.
  • AGC automatic gain control
  • the CSI-RS may assist a UE in estimating the channel between the base station and the UE.
  • the UE may return channel state feedback (CSF) , such as a channel state information (CSI) report, indicating the quality of the channel.
  • CSF channel state feedback
  • CSI channel state information
  • the CSF may include, for example, a channel quality indicator (CQI) , the rank indicator (RI) , and a precoding matrix indicator (PMI) .
  • the base station may use the CSF to update the rank associated with the UE and to assign resources for future transmissions to the UE.
  • the CQI may indicate an MCS to use for the future transmissions.
  • the SSB may include a primary synchronization signal (PSS) , a secondary synchronization signal (SSS) and a physical broadcast control channel (PBCH) .
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast control channel
  • a UE may utilize the PSS and SSS to achieve radio frame, subframe, slot, and symbol synchronization in the time domain, identify the center of the channel bandwidth in the frequency domain, and identify the physical cell identifier (PCI) of the cell.
  • the PBCH may include a master information block (MIB) that includes various system information, along with parameters for decoding a system information block (SIB) .
  • SIB may include, for example, a SystemInformationType1 (SIB1) that may include various additional system information.
  • system information transmitted in the MIB may include, but are not limited to, a subcarrier spacing, system frame number, a configuration of a PDCCH control resource set (CoreSet) (e.g., PDCCH CoreSet0) , and a search space for SIB1.
  • additional system information transmitted in the SIB1 may include, but are not limited to, a random access search space, downlink configuration information, and uplink configuration information.
  • the MIB and SIB1 together provide the minimum system information (SI) for initial access in a cell.
  • FIG. 5 is a diagram 500 illustrating communication between a base station (BS) 504, such as an eNB or gNB, and a UE 502 using millimeter wave (mmWave) beamformed signals according to some aspects of the disclosure.
  • the BS 504 may correspond to any of the base stations or scheduling entities illustrated in FIGs. 1 and/or 2
  • the UE 502 may correspond to any of the UEs or scheduled entities illustrated in FIGs. 1 and/or 2.
  • the BS 504 may transmit more or less beams radially distributed in all directions (e.g., 360 degrees) within a coverage area of the BS 504.
  • the BS 504 may generally be capable of communicating with the UE 502 using beams of varying beam widths.
  • the BS 504 may be configured to utilize a wide beam 506a for communication with the UE 502 when the UE 502 is in motion and a narrow beam 506b for communication with the UE 502 when the UE 502 is stationary.
  • each wide beam 506a has a beam width greater than the beam width of each narrow beam 506b.
  • the BS 504 may further be configured to broadcast reference signals 508 on each of the beams 506 (e.g., wide beams 506a and narrow beams 506b) in a beam-sweeping manner for initial access, time/frequency synchronization, channel estimation by the UE 502 and/or beam management.
  • the BS 504 may transmit a SSB, TRS, and/or CSI-RS over each of the beams 506.
  • the reference signal 508 utilizes a different reference signal waveform for transmission on each beam 506.
  • a reference signal waveform refers to a set of configuration parameters, including, for example, a reference signal identifier (RS ID) , a transmission configuration indicator (TCI) state that indicates quasi co-location (QCL) information (e.g., QCL-Type) of the reference signal waveform, and other suitable configuration parameters.
  • RS ID reference signal identifier
  • TCI transmission configuration indicator
  • QCL-Type quasi co-location
  • the RS ID may be a logical indexing of the RS, where each RS ID may be defined by a non-zero power (NZP) CSI-RS resource set including a unique list of two or four NZP CSI-RS resource IDs, each including a different mapping (e.g., using different REs/symbols) and different scrambling ID, thus producing a unique RS (e.g., TRS or CSI-RS) waveform.
  • NZP non-zero power
  • QCL-Type includes QCL-TypeA, which indicates an associated additional reference signal waveform from which various radio channel properties (e.g., the Doppler shift, Doppler spread, average delay, and/or delay spread) of the received reference signal waveform may be inferred.
  • the QCL-TypeA may indicate an associated TRS waveform from which the channel properties of the CSI-RS waveform may be inferred.
  • Another QCL-Type includes QCL-TypeD, which indicates a spatial RX parameter (e.g., spatial property of the beam on which the reference signal waveform is transmitted) .
  • the spatial property of the beam may be inferred from an associated additional reference signal waveform and may indicate, for example, at least one of a beam direction or a beam width.
  • the QCL-TypeD may indicate an associated SSB, CSI-RS, or TRS waveform from which the spatial property of the CSI-RS beam may be inferred.
  • Other QCL-Types e.g., QCL-TypeB and QCL-TypeC
  • QCL-Types may also indicate associated additional reference signal waveforms from which specific channel properties (e.g., Doppler shift and/or Doppler spread for QCL-TypeB and average delay and/or delay spread for QCL-TypeC) may be inferred.
  • Certain aspects of this disclosure relate to the use by the UE of MAC-CE commands to provide uplink TCI state (UL-TCI state) and power control parameter updates for PUSCH, PUCCH and/or SRS.
  • UL-TCI state uplink TCI state
  • the UL-TCI state and power control parameter updates can be indicated jointly. In other instances, the UL-TCI state and power control parameter updates may be indicated separately. In some implementations, different indicating mechanisms may be adopted for PUSCH, PUCCH and/or SRS.
  • FIG. 6 is a table 600 that illustrates an example of associations between UL-TCI state 602 and uplink beam information.
  • Each UL-TCI state 602 is associated with, and/or identifies a source reference signal 604.
  • the source reference signal 604 may be referred to as the reference RS and, in the illustrated example, indicates use of SSB, SRS or CSI-RS as the reference signal.
  • UL-TCI state 602 may also indicate an antenna panel identifier.
  • the beam associated with the identified source reference signal 604 may be used for uplink transmissions including PUCCH, PUSCH, SRS, etc.
  • UL-TCI state 602 can also indicate an uplink reference signal 606.
  • some UL-TCI states 602 indicate use of DMRS for PUSCH, and other UL-TCU states 602 indicate the use of DMRS for PUCCH or SRS for PRACH.
  • UL-TCI state 602 can also indicate QCL-Type 608.
  • the QCL-Type 608 provides information related to beams associated with corresponding UL-TCI states 602.
  • Each of the UL-TCI states may be assigned a multi-bit UL-TCI identifier ranging from 1 to N or from 0 to N-1 for N total UL-TCI states by RRC signalling.
  • a UE may be configured with up to 128 different UL-TCI states that can be selected by a gNB or other base station.
  • the gNB for example may use DCI signaling to select a current TCI state for the UE.
  • DCI signaling is unable to provide an index that matches the bit size of the UL-TCI identifier or a bit size that is necessary to select between the complete set of TCI states maintained at a UE.
  • a subset of active, or selectable, UL-TCI states may be mapped by MAC-CE signaling to codepoints that can be addressed by DCI signaling.
  • the TCI mapping can be used to select and/or indicate TCI state and power control configurations.
  • one type of codepoint may be defined as a bit in a bitfield that can be referenced, addressed, indexed, selected or indicated based on its position relative to a starting point of the bitfield.
  • Each codepoint of this type can take one of two values: ⁇ 0, 1 ⁇ .
  • eight codepoints may be represented by a group of 8 bits (i.e., an octet) , where each codepoint is identified by its respective bit position within the bitfield, ranging from bit B 0 up to and including bit B 7 .
  • the codepoint at B 0 may be referenced, addressed, indexed, selected or indicated using a zero-value identifier, while the fifth codepoint (B 4 ) may be referenced, addressed, indexed, selected or indicated using an identifier that has a value of 4.
  • FIG. 7 illustrates an example of a MAC-CE command 700 that can be used to map UL-TCI states to codepoints of a DCI field.
  • a maximum of 16-octet bitfield may be used to define whether an individual UL-TCI is active or selectable by a base station.
  • each of N UL-TCI states may be associated with a 1-bit UL-TCI identifier in the 16-octet bitfield, which may also be referred to as a 1-bit UL-TCI identifier, that indicates that the UL-TCI is active or selectable when the corresponding bit in the bit field is set to 1, and that the UL-TCI is inactive or not selectable when the corresponding bit in the bit field is set to 0.
  • DCI is unable to select between the complete set of UL-TCI states maintained at a UE.
  • the length of “Transmission Configuration Indication” field in DCI for UL-TCI indication is 3 bits
  • the codepoint of “Transmission Configuration Indication” field in the DCI for UL-TCI indication may indicate the selected one of eight UL-TCI states for the beam indication in the scheduled uplink transmission.
  • DCI codewords will be mapped by MAC-CE to a codepoint in the 16-octet bitfield representing UL-TCI states. In these instances, some DCI codepoints are considered to be mapped codepoints and the remainder are considered to be unmapped codepoints.
  • the illustrated MAC-CE command 700 may be transmitted in a UE-specific download channel to map a subset of the UL-TCI states configured at the UE, where the subset of the UL-TCI states can be fully indexed or selected by DCI signaling.
  • up to 128 UL-TCI states may be identified by a maximum of 16-octet bitfield, where each bit identifies/represents a UL-TCI state and the bit set to binary-1 indicates that the corresponding UL-TCI state is active or selectable.
  • Up to 8 DCI codepoints are provided by a “Transmission Configuration Indication” field that is 3 bits in length.
  • up to 8 bits of 16-octet bitfield are set to binary-1 and mapped to the 8 available DCI codepoints.
  • the UL-TCI states with corresponding bits in the bitfield are set to binary-1 may be referred to as active UL-TCI states, where an active UL-TCI state is associated with a mapped DCI codepoint.
  • DCI may include a Transmission Configuration Indication” field that has a codepoint value of 4, corresponding to the fifth DCI codepoint (CP 4 ) which is mapped to an active UL-TCI state in the 16-octet bitfield representing UL-TCI states, and thereby mapped to a multi-bit UL-TCI identifier that can be used to access TCI state from a table of TCI states maintained by the UE.
  • CP 4 DCI codepoint
  • the illustrated MAC-CE command 700 can be used by the base station to activate or deactivate one or more UL-TCI states by setting or clearing corresponding bits in a multi-octet bitfield transmitted in the MAC-CE command 700.
  • the UL-TCI state corresponding to the T 12 bit 712 (or thirteenth UL-TCI state) may be activated when the value of the T 12 bit 712 is set to ‘1’ and deactivated when the value of the T 12 bit 712 is cleared to ‘0’ .
  • the T 12 bit 712 corresponds to a 1-bit UL-TCI identifier of the activated UL-TCI state and is mapped to a DCI codepoint in the “Transmission Configuration Indication” field of the DCI.
  • the UL-TCI identifier may be an index, here set to 12, that can be used to select the indicated UL-TCI state from a list or table of UL-TCI states maintained in the UE and/or gNB. That is, when DCI includes a “Transmission Configuration Indication” corresponding to a DCI codepoint that is mapped to the T 12 bit 712 in the 16-octet bitfield representing UL-TCI states, the UE may use the corresponding UL-TCI identifier to select the desired UL-TCI state from a list or table of UL-TCI states maintained in the UE and/or gNB.
  • mapping of a 1-bit UL-TCI identifier in the bitfield to a DCI codepoint effectively maps the multi-bit UL-TCI identifier to the DCI codepoint, since the UL-TCI identifier state represents the UL-TCI state that is accessed or selected from the table of TCI states using the multi-bit UL-TCI identifier.
  • the MAC-CE command 700 can be used to down-select a subset of the available or configured UL-TCI states to facilitate UL-TCI indication using a limited number of UL-TCI codepoints corresponding to the available DCI codepoints.
  • 8 codepoints provided by the Transmission Configuration Indication field in the uplink DCI and up to 128 UL-TCI states may be configured in a list maintained by the UE.
  • the MAC-CE command 700 may be used to map up to 8 of the UL-TCI states to DCI codepoints.
  • the illustrated MAC-CE command 700 includes N Octets 710 where the first octet 708 provides identifying information, including a 5-bit serving cell identifier 704 and a 2-bit bandwidth part identifier 706.
  • One bit 702 of the first octet 708 is reserved by protocol.
  • a UE may be configured to determine transmission power (P PUSCH (i, j, q d , l) ) for transmitting a PUSCH on an active UL BWP b of carrier f of serving cell c using a parameter set configuration with index j and PUSCH power control adjustment state with closed loop index l within the PUSCH transmission occasion I, and subject to the maximum transmit power limit (P cmax,f,c (i) ) , as:
  • ⁇ b, f, c is the path loss compensation factor
  • PL b, f, c is the path loss downlink reference signal (PL-RS) ,
  • ⁇ TF, f, c is the MCS related adjustment
  • f b, f, c is the PUSCH power control adjustment state.
  • Certain aspects of this disclosure relate to the use of MAC-CE commands for indicating of UL-TCI state and power control updates.
  • different MAC-CE commands may be used to indicate UL-TCI state and power control updates separately.
  • a single MAC-CE command may be used to indicate UL-TCI state and power control updates separately jointly.
  • FIG. 8 illustrates a MAC-CE command 800 for PUSCH that may be used for joint indicating of UL-TCI state and power control updates.
  • four UL-TCI states are active and the corresponding UL-TCI identifier (bits T 1 , T 4 , T 12 , T 14 ) in the bitfield are mapped to four DCI codepoints in DCI.
  • the corresponding 1-bit UL-TCI identifier in the TCI octets 808 are set to ‘1’ to indicate an active UL-TCI state.
  • the first octet provides identifying information, including a 5-bit serving cell identifier 804 and a 2-bit bandwidth part identifier 806.
  • the MAC-CE command 800 further includes power update octets 810 that provide power control parameter set identifiers for the active UL-TCI states identified in the TCI octets 808.
  • a first power control octet 812 indicates a power control parameter set to be used with the UL-TCI state indicated by T 1
  • a second power control octet 814 indicates a power control parameter set to be used with the UL-TCI state indicated by T 4
  • a third power control octet 816 indicates a power control parameter set to be used with the UL-TCI state indicated by T 12
  • a fourth power control octet 818 indicates a power control parameter set to be used with the UL-TCI state indicated by T 14 .
  • This example of association between power control parameter set and UL-TCI state is based on a TCI mapping that relates 1-bit UL-TCI identifiers in the bitfield to DCI codepoints in which the least significant 1-bit UL-TCI identifier in the bitfield is mapped to the least significant DCI codepoint.
  • FIG. 8 further includes a representation of a power control parameter set 820.
  • the power control parameter set 820 includes a set identifier field 822 that can associate the power control parameter set 820 with one of the active UL-TCI states.
  • the illustrated power control parameter set 820 may include any of a first entry 824 for the power control parameter set identifier, a second entry 826 for the PL-RS (PL b, f, c ) , a third entry 828 for the closed loop index (l) , and a fourth entry 830 for the path loss compensation factor ( ⁇ b, f, c ) .
  • Each field 824, 826, 828, 830 defines a parameter to be used for the UL-TCI state corresponding to the power control parameter set identified by the set identifier field 822.
  • FIG. 9 illustrates MAC-CE commands 900, 920 for PUSCH that may be used for separately indicating UL-TCI state and power control updates.
  • the first MAC-CE command 900 in FIG. 9 is used to indicate UL-TCI state.
  • four UL-TCI states (indicated by 1-bit UL-TCI identifier T 1 , T 4 , T 12 , T 14 ) are active and mapped to DCI codepoints, since the corresponding bits in the TCI indication octets are set to ‘1’ .
  • the first octet provides identifying information, including a 5-bit serving cell identifier 904 and a 2-bit bandwidth part identifier 906.
  • One bit 902 of the first octet is reserved by protocol.
  • the second MAC-CE command 920 in FIG. 9 includes power control parameter set IDs 930 mapped to DCI codepoints.
  • a set of power control parameters identified by a power control parameter set ID 930 is to be used with the UL-TCI states that has a UL-TCI codeword/indicator mapped to the corresponding DCI codepoint in the second octet 928.
  • the first octet of the second MAC-CE command 920 provides identifying information, including a 5-bit serving cell identifier 924 and a 2-bit bandwidth part identifier 926. One bit 922 of the first octet is reserved by protocol.
  • the MAC-CE command 920 can be used to identify up to 8 power control parameter sets. The exact number of power control parameter sets in MAC-CE command 920 is determined by the number of active UL-TCIs, or the number of mapped codepoints in the DCI for UL-TCI indication.
  • the second octet 928 in the MAC-CE command 920 is used to indicate active or available power control configurations per active UL-TCI, or per each codepoint for UL-TCI indication in the DCI.
  • four codepoints (CP 1 , CP 2 , CP 3 , CP 4 ) are set to a binary ‘1’ value, indicating that four power control parameter set IDs 930 are transmitted in the MAC-CE command 920.
  • each of the power control parameter set IDs 930 may identify a power control configuration that may be represented by the power control parameter set 820 illustrated in FIG. 8.
  • FIG. 10 illustrates a MAC-CE command 1000 for PUSCH that may be used for individual PC parameter updates when UL-TCI state and power control updates are separately indicated.
  • the first octet provides identifying information, including a 5-bit serving cell identifier 1004 and a 2-bit bandwidth part identifier 1006. One bit 1002 of the first octet is reserved by protocol.
  • the third octet 1010 carries a power control parameter set ID to be used with the UL-TCI state associated with the UL-TCI state identified in the second octet 1008.
  • the third octet 1010 carries a power control parameter set ID to be used with the codepoint identified in the second octet 1008.
  • the power control parameter set ID may identify a power control configuration that may be represented as illustrated in the power control parameter set 820 illustrated in FIG. 8.
  • FIG. 11 illustrates a MAC-CE command 1100 for PUCCH that may be used for joint indicating of UL-TCI state and power control updates.
  • the first octet provides identifying information, including a 5-bit serving cell identifier 1104 and a 2-bit bandwidth part identifier 1106. One bit 1102 of the first octet is reserved by protocol.
  • a PUCCH resource ID 1108 is included to identify a PUCCH resource to be used with the MAC-CE command 1100.
  • the MAC-CE command 1100 selects one of the UL-TCI states to be indicated for the PUCCH resource identified by the PUCCH resource ID 1108.
  • the MAC-CE command 1100 selects a UL-TCI state corresponding to the UL-TCI identifier (T 1 ) in the bitfield 1110 from up to 8 UL-TCI states to be indicated by setting the corresponding bit 1112 in a bitfield 1110 to ‘1’ .
  • the PUCCH resource identified by the PUCCH resource ID 1108 may be limited in size and the UL-TCI state corresponding to the T 1 UL-TCI identifier may be indicated for the full PUCCH resource.
  • a power control parameter set identifier 1114 indicates a power control parameter set to be used with the selected UL-TCI state for the corresponding PUCCH transmission.
  • FIG. 12 illustrates MAC-CE commands 1200, 1220 for PUCCH that may be used for separately indicating UL-TCI state and power control updates.
  • the first MAC-CE command 1200 in FIG. 12 is used to indicate UL-TCI state for a PUCCH resource.
  • the first octet provides identifying information, including a 5-bit serving cell identifier 1204 and a 2-bit bandwidth part identifier 1206.
  • One bit 1202 of the first octet is reserved by protocol.
  • the MAC-CE command 1200 indicates a 1-bit UL-TCI identifier (T 1 ) by setting the corresponding bit 1212 in a bitfield 1210 to ‘1’ to indicate a UL-TCI state from up to 8 UL-TCI states.
  • the selected UL-TCI state is indicated for the corresponding PUCCH resource identified by the PUCCH resource ID 1208.
  • the second MAC-CE command 1220 in FIG. 12 is used to provide power control updates.
  • the first octet provides identifying information, including a 5-bit serving cell identifier 1224 and a 2-bit bandwidth part identifier 1226.
  • One bit 1222 of the first octet is reserved by protocol.
  • a power control parameter set identifier 1230 indicates a power control parameter set for the PUCCH resource identified by the PUCCH resource ID 1228.
  • FIG. 13 illustrates a MAC-CE command 1300 for SRS that may be used for joint indicating of UL-TCI state and power control updates.
  • the first field provides identifying information, including a serving cell identifier 1302, and a bandwidth part identifier 1304.
  • An SRS resource set ID 1306 is included to identify a set of SRS resources to be used for the joint indicating of UL-TCI state and power control updates.
  • the MAC-CE command 1300 includes a power control parameter set identifier 1308 and SRS resource identifiers 1310 for each resource in the set of resources identified by the SRS resource set ID 1306. All of the SRSs in the SRS resource set ID 1306 are associated with the same power control parameter set identifier 1308.
  • UL-TCI state identifiers 1312 are provided, where each of the multi-bit UL-TCI state identifiers 1312 corresponds to one of the SRS resource identifiers 1310.
  • FIG. 14 illustrates MAC-CE commands 1400, 1420 for SRS that may be used for separately indicating UL-TCI state and power control updates.
  • the first MAC-CE command 1400 in FIG. 14 is used to indicate UL-TCI states for each SRS in an SRS resource set.
  • Identifying information includes a serving cell identifier 1402, a bandwidth part identifier 1404, and an SRS resource set ID 1406 that identifies a set of SRS resources to be used for the indicating of UL-TCI state.
  • SRS resource identifiers 1310 are provided for SRS resources used by the first MAC-CE command 1400.
  • each of the UL-TCI state identifier 1410 corresponds to one of the SRS resource identifiers 1408 and indicates a UL-TCI state mapped to a DCI codepoint provided by the Transmission Configuration Indication field in the DCI.
  • the second MAC-CE command 1420 in FIG. 14 is used to provide power control updates.
  • Identifying information includes a serving cell identifier 1422, a bandwidth part identifier 1424, and an SRS resource set ID 1426 that identifies a set of SRS resources to be used for the indicating power control updates.
  • a power control parameter set identifier 1428 indicates the power control parameter set using the SRS resource identified by the SRS resource set ID 1426.
  • FIG. 15 is a conceptual diagram illustrating an example of a hardware implementation for an exemplary base station employing a processing system 1514.
  • the base station 1500 may be a gNB, eNB, or scheduling entity as illustrated in any one or more of FIGs. 1, 2, 4 and/or 5.
  • the base station 1500 may be implemented with a processing system 1514 that includes one or more processors 1504.
  • processors 1504 include microprocessors, microcontrollers, digital signal processors (DSPs) , field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • DSPs digital signal processors
  • FPGAs field programmable gate arrays
  • PLDs programmable logic devices
  • state machines gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • the base station 1500 may be configured to perform any one or more of the functions described herein. That is, the processor 1504, as utilized in a base station 1500, may be used to implement any one or more of the processes described below.
  • the processor 1504 may in some instances be implemented via a baseband or modem chip and in other implementations, the processor 1504 may itself comprise a number of devices distinct and different from a baseband or modem chip (e.g., in such scenarios is may work in concert to achieve embodiments discussed herein) . And as mentioned above, various hardware arrangements and components outside of a baseband modem processor can be used in implementations, including RF-chains, power amplifiers, modulators, buffers, interleavers, adders/summers, etc.
  • the processing system 1514 may be implemented with a bus architecture, represented generally by the bus 1502.
  • the bus 1502 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1514 and the overall design constraints.
  • the bus 1502 communicatively couples together various circuits including one or more processors (represented generally by the processor 1504) , a memory 1516, and computer-readable media (represented generally by the computer-readable medium 1506) .
  • the bus 1502 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.
  • a bus interface 1508 provides an interface between the bus 1502 and a transceiver 1510.
  • the transceiver 1510 provides a means for communicating with various other apparatus over a transmission medium (e.g., air interface) .
  • a user interface 1512 e.g., keypad, display, speaker, microphone, joystick
  • the user interface 1512 is optional, and may be omitted.
  • the processor 1504 is responsible for managing the bus 1502 and general processing, including the execution of software stored on the computer-readable medium 1506.
  • the software when executed by the processor 1504, causes the processing system 1514 to perform the various functions described below for any particular apparatus.
  • the computer-readable medium 1506 and the memory 1516 may also be used for storing data that is manipulated by the processor 1504 when executing software.
  • One or more processors 1504 in the processing system may execute software.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • the software may reside on a computer-readable medium 1506.
  • the computer-readable medium 1506 may be a non-transitory computer-readable medium.
  • a non-transitory computer-readable medium includes, by way of example, a magnetic storage device (e.g., hard disk, floppy disk, magnetic strip) , an optical disk (e.g., a compact disc (CD) or a digital versatile disc (DVD) ) , a smart card, a flash memory device (e.g., a card, a stick, or a key drive) , a random access memory (RAM) , a read only memory (ROM) , a programmable ROM (PROM) , an erasable PROM (EPROM) , an electrically erasable PROM (EEPROM) , a register, a removable disk, and any other suitable medium for storing software and/or instructions that may be accessed and read by a computer.
  • a magnetic storage device e.g., hard disk, floppy disk, magnetic strip
  • an optical disk e.g.
  • the computer-readable medium may also include, by way of example, a carrier wave, a transmission line, and any other suitable medium for transmitting software and/or instructions that may be accessed and read by a computer.
  • the computer-readable medium 1506 may reside in the processing system 1514, external to the processing system 1514, or distributed across multiple entities including the processing system 1514.
  • the computer-readable medium 1506 may be embodied in a computer program product.
  • the computer-readable medium 1506 may be part of the memory 1516.
  • a computer program product may include a computer-readable medium in packaging materials.
  • the processor 1504 may include circuitry configured for various functions.
  • the processor 1504 may include indicator mapping and demapping circuitry 1542 that may be configured to generate, maintain, modify, distribute and/or use a mapping that maps TCI state indicators to DCI codepoints, and/or the codepoints to power control parameter set identifiers.
  • the mapping may be used to down-select a large set of TCI state indicators where, for example, up to 8 TCI state indicators may be mapped to 8 codepoints.
  • the codepoints may be used by MAC-CE commands to indicate TCI state and power control updates, jointly or separately.
  • the TCI state indicators may be used to index or reference a listing of TCI states 1522 stored in the memory 1516.
  • the power control parameter set identifiers may be used to index or reference a listing of power control parameter sets 1524 stored in the memory 1516.
  • the resource assignment and scheduling circuitry 1542 may further be configured to execute indicator mapping and demapping software 1562 stored in the computer-readable medium 1506 to implement one or more of the functions described herein.
  • the processor 1504 may further include communication and processing circuitry 1544, configured to communicate with one or more user equipment (UEs) or scheduled entities located within a coverage area of the base station 1500.
  • the communication and processing circuitry 1544 may include one or more hardware components that provide the physical structure that performs processes related to wireless communication (e.g., signal reception and/or signal transmission) and signal processing (e.g., processing a received signal and/or processing a signal for transmission) .
  • the communication and processing circuitry 1544 may be configured to generate and transmit downlink beamformed signals at, for example, a mmWave frequency via the transceiver 1510 and antenna array module 1520.
  • the communication and processing circuitry 1544 may be configured to transmit a downlink MAC-CE command and DCI.
  • the communication and processing circuitry 1544 may further be configured to receive uplink beamformed signals at, for example, a mmWave frequency.
  • the communication and processing circuitry 1544 may be configured to receive uplink MAC-CE commands.
  • the communication and processing circuitry 1544 may further be configured to execute communication and processing software 1564 stored in the computer-readable medium 1506 to implement one or more of the functions described herein.
  • the processor 1504 may further include MAC-CE command handling circuitry 1546.
  • the MAC-CE command handling circuitry 1546 may be configured to generate a downlink MAC-CE command to a UE, where the downlink MAC-CE command defines a TCI mapping used to map one or more TCI state indicators to a corresponding number of DCI codepoints.
  • the MAC-CE command handling circuitry 1546 may be further configured to process an uplink MAC-CE command from the UE, where the uplink MAC-CE includes a mapped codepoint indicative of TCI state and/or power control parameter set.
  • the MAC-CE command handling circuitry 1546 may further be configured to execute MAC-CE command handling software 1566 stored in the computer-readable medium 1506 to implement one or more of the functions described herein.
  • FIG. 16 is a conceptual diagram illustrating an example of a hardware implementation for an exemplary UE 1600 employing a processing system 1614.
  • an element, or any portion of an element, or any combination of elements may be implemented with a processing system 1614 that includes one or more processors 1602.
  • the UE 1600 may be a user equipment (UE) , integrated access backhaul (IAB) network node, or other type of scheduled entity as illustrated in FIGs. 1, 2, 2 and/or 5.
  • UE user equipment
  • IAB integrated access backhaul
  • the processing system 1614 may be substantially the same as the processing system 1514 illustrated in FIG. 15, including a bus interface 1608, a bus 1606, memory 1616, a processor 1602, and a computer-readable medium 1604.
  • the UE 1600 may include an optional user interface 1612 and a transceiver 1610 substantially similar to those described above in FIG. 15. That is, the processor 1602, as utilized in a UE 1600, may be used to implement any one or more of the processes described below and illustrated in the various figures.
  • the processor 1602 may include circuitry configured for various functions.
  • the processor 1602 may include indicator mapping and demapping circuitry 1622 that may be configured to generate, maintain, modify, update and/or use a mapping 1630 that maps TCI state indicators to DCI codepoints, and/or the codepoints to power control parameter set identifiers.
  • the mapping 1630 may be used to down-select a large set of TCI state indicators where, for example, up to 8 TCI state indicators may be mapped to 8 codepoints.
  • the codepoints may be used by MAC-CE commands to indicate TCI state and power control updates, jointly or separately.
  • the TCI state indicators may be used to index or reference a listing of TCI states 1628 stored in the memory 1616.
  • the power control parameter set identifiers may be used to index or reference a listing of power control parameter sets 1632 stored in the memory 1616.
  • the indicator mapping and demapping circuitry 1622 may further be configured to execute indicator mapping and demapping software 1642 stored in the computer-readable medium 1604 to implement one or more of the functions described herein.
  • the processor 1602 may further include communication and processing circuitry 1624, configured to communicate with a base station or scheduling entity.
  • the communication and processing circuitry 1624 may include one or more hardware components that provide the physical structure that performs processes related to wireless communication (e.g., signal reception and/or signal transmission) and signal processing (e.g., processing a received signal and/or processing a signal for transmission) .
  • the communication and processing circuitry 1624 may be configured to generate and transmit uplink beamformed signals at, for example, a mmWave frequency via the transceiver 1610 and antenna array module 1620.
  • the communication and processing circuitry 1624 may be configured to transmit uplink MAC-CE commands.
  • the communication and processing circuitry 1624 may further be configured to receive downlink beamformed signals at, for example, a mmWave frequency.
  • the communication and processing circuitry 1624 may further be configured to receive MAC-CE commands.
  • the communication and processing circuitry 1624 may further be configured to execute communication and processing software 1644 stored in the computer-readable medium 1604 to implement one or more of the functions described herein.
  • the processor 1602 may further include MAC-CE command handling circuitry 1626.
  • the MAC-CE command handling circuitry 1626 may be configured to process a downlink MAC-CE command from a base station, where the downlink MAC-CE command defines a TCI mapping (e.g., the mapping 1630) used to map one or more TCI state indicators to a corresponding number of DCI codepoints.
  • the MAC-CE command handling circuitry 1626 may be further configured to generate an uplink MAC-CE command to the base station, where the uplink MAC-CE command includes a mapped codepoint indicative of TCI state and/or power control parameter set.
  • the MAC-CE command handling circuitry 1626 may further be configured to execute MAC-CE command handling software 1646 stored in the computer-readable medium 1604 to implement one or more of the functions described herein.
  • FIG. 17 is a flow chart 1700 of a method for wireless communication at a base station in a wireless communication network according to some aspects of the disclosure. As described below, some or all illustrated features may be omitted in a particular implementation within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments. In some examples, the method may be performed by the base station 1500, as described above and illustrated in FIG. 15, by a processor or processing system, or by any suitable means for carrying out the described functions.
  • the base station 1500 may transmit a downlink MAC-CE command to a UE.
  • the downlink MAC-CE command may be configured to define a TCI mapping that maps one or more TCI state indicators to DCI codepoints to obtain a corresponding number of mapped codepoints.
  • the TCI mapping may map up to eight TCI state indicators to an eight-bit field in the DCI and up to eight TCI states may be selected to be active TCI states, such that the eight active TCI states can be indicated using a 3-bit number or an 8-bit bitfield.
  • the base station 1500 may receive an uplink MAC-CE command from the UE.
  • the uplink MAC-CE command may include a mapped codepoint.
  • the base station 1500 may determine TCI state or a power control parameter set corresponding to the mapped codepoint using the TCI mapping.
  • the base station 1500 may use the TCI mapping to determine a TCI state indicator from the mapped codepoint.
  • the base station 1500 may use the mapped codepoint to index a power control parameter set identifier in the uplink MAC-CE command.
  • the base station 1500 may use the TCI mapping to determine both a TCI state indicator and a power control parameter set identifier, where the power control parameter set identifier may be indexed in the uplink MAC-CE command using the mapped codepoint.
  • the second MAC-CE command 920 in FIG. 9, for example, may be an uplink MAC-CE command that includes a bit field (second octet 928) , where each bit represents a codepoint. In one example, the bit number may be used to index into the power control parameter set IDs 930 provided in the uplink MAC-CE command.
  • the base station 1500 may receive the uplink MAC-CE command in a PUSCH. In another example, the base station 1500 may receive the uplink MAC-CE command in a PUCCH. In the later example, the base station 1500 may receive a PUCCH resource identifier for a resource that carries the mapped codepoint. In another example, the base station 1500 may receive the uplink MAC-CE command in an SRS. In the later example, the base station 1500 may receive an SRS resource set identifier for a set of SRS resources used by the uplink MAC-CE command.
  • the base station 1500 includes means for performing the various functions and processes described in relation to FIG. 17.
  • the aforementioned means may be the processor 1504 shown in FIG. 15 configured to perform the functions recited by the aforementioned means.
  • the aforementioned means may be a circuit or any apparatus configured to perform the functions recited by the aforementioned means.
  • circuitry included in the processor 1504 is merely provided as an example, and other means for carrying out the described functions may be included within various aspects of the present disclosure, including but not limited to the instructions stored in the computer-readable medium 1506, or any other suitable apparatus or means described in any one of the FIGs. 1, 2, 4, 15 and/or 16, and utilizing, for example, the processes and/or algorithms described herein in relation to FIG. 17.
  • FIG. 18 is a flow chart illustrating a process 1800 operable at a user equipment (UE) to communicate with a base station within a wireless communication network according to some aspects of the disclosure. As described below, some or all illustrated features may be omitted in a particular implementation within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments. In some examples, the process 1800 may be carried out by the UE 1600 illustrated in FIG. 16. In some examples, the process 1800 may be carried out by any suitable apparatus or means for carrying out the functions or algorithm described below.
  • UE user equipment
  • the UE 1600 may receive a downlink MAC-CE command from a base station.
  • the downlink MAC-CE command may provide mappings of one or more TCI state indicators to a corresponding number of DCI codepoints, thereby defining one or more mapped codepoints.
  • the UE 1600 may configure a TCI mapping to include the mappings provided in the downlink MAC-CE command.
  • the TCI mapping may map up to eight TCI state indicators to an eight-bit field in the DCI.
  • the UE 1600 may transmit a mapped codepoint in an uplink MAC-CE command to the base station.
  • the mapped codepoint may indicate a TCI state indicator (codepoint) , TCI state identifier or a power control parameter set identifier.
  • the UE 1600 may transmit the uplink MAC-CE command to indicate the TCI state identifier. In another example, the UE 1600 may transmit the uplink MAC-CE command to indicate the power control parameter set identifier. In one example, the UE 1600 may transmit the uplink MAC-CE command to indicate both the TCI state identifier and the power control parameter set identifier.
  • the UE 1600 may transmit the uplink MAC-CE command in a PUSCH. In another example, the UE 1600 may transmit the uplink MAC-CE command in a PUCCH. In the latter example, the UE 1600 may transmit a PUCCH resource identifier in the uplink MAC-CE command to identify a resource that carries the mapped codepoint. In another example, the UE 1600 may transmit the uplink MAC-CE command in an SRS. In the latter example, In another example, the UE 1600 may transmit an SRS resource set identifier in the uplink MAC-CE command to identify a set of SRS resources used by the uplink MAC-CE command.
  • various aspects may be implemented within other systems defined by 3GPP, such as Long-Term Evolution (LTE) , the Evolved Packet System (EPS) , the Universal Mobile Telecommunication System (UMTS) , and/or the Global System for Mobile (GSM) .
  • LTE Long-Term Evolution
  • EPS Evolved Packet System
  • UMTS Universal Mobile Telecommunication System
  • GSM Global System for Mobile
  • Various aspects may also be extended to systems defined by the 3rd Generation Partnership Project 2 (3GPP2) , such as CDMA2000 and/or Evolution-Data Optimized (EV-DO) .
  • 3GPP2 3rd Generation Partnership Project 2
  • EV-DO Evolution-Data Optimized
  • Other examples may be implemented within systems employing IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Ultra-Wideband (UWB) , Bluetooth, and/or other suitable systems.
  • Wi-Fi IEEE 802.11
  • WiMAX IEEE 8
  • the word “exemplary” is used to mean “serving as an example, instance, or illustration. ” Any implementation or aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects of the disclosure. Likewise, the term “aspects” does not require that all aspects of the disclosure include the discussed feature, advantage or mode of operation.
  • the term “coupled” is used herein to refer to the direct or indirect coupling between two objects. For example, if object A physically touches object B, and object B touches object C, then objects A and C may still be considered coupled to one another-even if they do not directly physically touch each other. For instance, a first object may be coupled to a second object even though the first object is never directly physically in contact with the second object.
  • circuit and “circuitry” are used broadly, and intended to include both hardware implementations of electrical devices and conductors that, when connected and configured, enable the performance of the functions described in the present disclosure, without limitation as to the type of electronic circuits, as well as software implementations of information and instructions that, when executed by a processor, enable the performance of the functions described in the present disclosure.
  • FIGs. 1–17 may be rearranged and/or combined into a single component, step, feature or function or embodied in several components, steps, or functions. Additional elements, components, steps, and/or functions may also be added without departing from novel features disclosed herein.
  • the apparatus, devices, and/or components illustrated in FIGs. 1, 2, 4–8, 11, and 16 may be configured to perform one or more of the methods, features, or steps described herein.
  • the novel algorithms described herein may also be efficiently implemented in software and/or embedded in hardware.
  • “at least one of: a, b, or c” is intended to cover: a; b; c; a and b; a and c; b and c; and a, b, and c. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims.

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Abstract

Des aspects de la divulgation se rapportent à la surcharge spatiale de signaux de référence. Une station de base dans un réseau de communication sans fil comprend la transmission d'une instruction d'élément de commande de de contrôle d'accès au support (MAC) (MAC-CE) de liaison descendante à un équipement utilisateur (UE). L'instruction MAC-CE de liaison descendante peut être configurée pour définir un mappage d'indicateur de configuration de transmission (TCI) qui mappe un ou plusieurs identifiants d'état TCI à des points de code d'informations de commande de liaison descendante (DCI) afin d'obtenir un nombre correspondant de points de code mappés. Le procédé peut comprendre la réception d'une instruction MAC-CE de liaison montante en provenance de l'UE, l'instruction MAC-CE de liaison montante comprenant un point de code mappé, et la détermination d'un état TCI ou d'un ensemble de paramètres de commande de puissance correspondant au point de code mappé au moyen du mappage TCI.
PCT/CN2020/084153 2020-04-10 2020-04-10 Indicateur de configuration de transmission de liaison montante et mise à jour de paramètres de commande de puissance WO2021203404A1 (fr)

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