WO2021223231A1 - Comptage de signaux de référence d'affaiblissement de chemin dans une agrégation de porteuses - Google Patents

Comptage de signaux de référence d'affaiblissement de chemin dans une agrégation de porteuses Download PDF

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Publication number
WO2021223231A1
WO2021223231A1 PCT/CN2020/089237 CN2020089237W WO2021223231A1 WO 2021223231 A1 WO2021223231 A1 WO 2021223231A1 CN 2020089237 W CN2020089237 W CN 2020089237W WO 2021223231 A1 WO2021223231 A1 WO 2021223231A1
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WIPO (PCT)
Prior art keywords
rss
component carrier
wireless communication
component carriers
communication device
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Application number
PCT/CN2020/089237
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English (en)
Inventor
Yan Zhou
Fang Yuan
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/CN2020/089237 priority Critical patent/WO2021223231A1/fr
Publication of WO2021223231A1 publication Critical patent/WO2021223231A1/fr

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    • 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

Definitions

  • the technology discussed below relates generally to wireless communication networks, and more particularly, to path loss reference signals used in in carrier aggregation.
  • a user equipment may be configured to combine multiple carriers to increase transmission bandwidth over that of a single carrier.
  • CA carrier aggregation
  • the CCs may be paired frequency division duplex (FDD) carriers, time division duplex (TDD) carriers, or a mixture of FDD and TDD carriers.
  • FDD frequency division duplex
  • TDD time division duplex
  • One component carrier (CC) may be configured as a primary CC (e.g., carrier associated with a primary cell (Pcell) )
  • other CCs may be configured as secondary CCs (e.g., carriers associated with secondary cells)
  • one of the secondary CCs may be configured as a primary secondary CC (e.g., carrier associated with a primary secondary cell (PScell) ) .
  • the coverage of each of the cells may differ since component carriers in different frequency bands may experience different path loss.
  • the UE may control the uplink transmission power of uplink signals transmitted from the UE based on the measured path loss.
  • the path loss can be measured by the UE using one or more path loss reference signals (PL-RSs) transmitted on the downlink to the UE.
  • PL-RSs may be configured on the UE for one or more of the component carriers.
  • the measured path loss on one component carrier may be used for uplink transmission power control on another component carrier.
  • a wireless communication device e.g., a UE maintains a plurality of PL-RSs utilized for uplink transmission power control on a plurality of component carriers within a cell group.
  • the cell group can include a master cell group (MCG) or a secondary cell group (SCG) .
  • the maintained PL-RS may be configured on the UE by the serving cell (s) in the cell group.
  • Each maintained PL-RS may be associated with a particular component carrier.
  • each maintained PL-RS may be received on a particular component carrier and may include a unique identifier that identifies the PL-RS on the particular component carrier.
  • each maintained PL-RS may be applied to uplink transmission power control on one or more component carriers.
  • the wireless communication device may be configured to count the total number of PL-RSs maintained across all component carriers.
  • the wireless communication device may further be configured to count the respective number of PL-RSs maintained for each component carrier or the respective number of PL-RSs applied to each component carrier.
  • the wireless communication device may further be configured to verify that the counted number of PL-RSs is less than or equal to a threshold.
  • a method for wireless communication at a wireless communication device in a wireless communication network can include communicating within a cell group utilizing a plurality of component carriers, receiving a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, counting a total number of the plurality of PL-RSs maintained at the wireless communication device, and verifying the total number of the plurality of PL-RSs is less than or equal to a threshold.
  • PL-RS path loss reference signal
  • a wireless communication device in a wireless communication network including a wireless transceiver, a memory, and a processor communicatively coupled to the wireless transceiver and the memory.
  • the processor and the memory can be configured to communicate within a cell group utilizing a plurality of component carriers via the wireless transceiver, receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers via the wireless transceiver, count a total number of the plurality of PL-RSs maintained at the wireless communication device, and verify the total number of the plurality of PL-RSs is less than or equal to a threshold.
  • PL-RS path loss reference signal
  • the wireless communication device can include means for communicating within a cell group utilizing a plurality of component carriers, means for receiving a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, means for counting a total number of the plurality of PL-RSs maintained at the wireless communication device, and means for verifying the total number of the plurality of PL-RSs is less than or equal to a threshold.
  • PL-RS path loss reference signal
  • Another example provides a non-transitory computer-readable medium including code for causing a wireless communication device to communicate within a cell group utilizing a plurality of component carriers, receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, count a total number of the plurality of PL-RSs maintained at the wireless communication device, and verify the total number of the plurality of PL-RSs is less than or equal to a threshold.
  • PL-RS path loss reference signal
  • a method for wireless communication at a wireless communication device in a wireless communication network can include communicating within a cell group utilizing a plurality of component carriers, receiving a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, counting a respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers, and verifying the respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • PL-RS path loss reference signal
  • a wireless communication device in a wireless communication network including a wireless transceiver, a memory, and a processor communicatively coupled to the wireless transceiver and the memory.
  • the processor and the memory can be configured to communicate within a cell group utilizing a plurality of component carriers via the wireless transceiver, receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers via the wireless transceiver, count a respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers, and verify the respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • PL-RS path loss reference signal
  • the wireless communication device can include means for communicating within a cell group utilizing a plurality of component carriers, means for receiving a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, means for counting a respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers, and means for verifying the respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • PL-RS path loss reference signal
  • Another example provides a non-transitory computer-readable medium including code for causing a wireless communication device to communicate within a cell group utilizing a plurality of component carriers, receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, count a respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers, and verify the respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • PL-RS path loss reference signal
  • a method for wireless communication at a wireless communication device in a wireless communication network can include communicating within a cell group utilizing a plurality of component carriers, receiving a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, counting a respective number of applied PL-RSs of the plurality of PL-RSs applied to respective uplink transmission power control for each component carrier of the plurality of component carriers, and verifying the respective number of applied PL-RSs applied to the respective uplink power control for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • PL-RS path loss reference signal
  • a wireless communication device in a wireless communication network including a wireless transceiver, a memory, and a processor communicatively coupled to the wireless transceiver and the memory.
  • the processor and the memory can be configured to communicate within a cell group utilizing a plurality of component carriers via the wireless transceiver, receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers via the wireless transceiver, count a respective number of applied PL-RSs of the plurality of PL-RSs applied to respective uplink transmission power control for each component carrier of the plurality of component carriers, and verify the respective number of applied PL-RSs applied to the respective uplink power control for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • PL-RS path loss reference signal
  • the wireless communication device can include means for communicating within a cell group utilizing a plurality of component carriers, means for receiving a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, means for counting a respective number of applied PL-RSs of the plurality of PL-RSs applied to respective uplink transmission power control for each component carrier of the plurality of component carriers, and means for verifying the respective number of applied PL-RSs applied to the respective uplink power control for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • PL-RS path loss reference signal
  • Another example provides a non-transitory computer-readable medium including code for causing a wireless communication device to communicate within a cell group utilizing a plurality of component carriers, receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers, count a respective number of applied PL-RSs of the plurality of PL-RSs applied to respective uplink transmission power control for each component carrier of the plurality of component carriers, and verify the respective number of applied PL-RSs applied to the respective uplink power control for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • PL-RS path loss reference signal
  • 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 conceptual diagram illustrating an example of a multi-cell transmission environment according to some aspects.
  • FIG. 6 is a diagram illustrating examples of maintained and applied path loss reference signals (PL-RSs) in a carrier aggregation (CA) network configuration according to some aspects.
  • PL-RSs maintained and applied path loss reference signals
  • CA carrier aggregation
  • FIG. 7 is a block diagram illustrating an example of a hardware implementation for a wireless communication device employing a processing system according to some aspects.
  • FIG. 8 is a flow chart of an exemplary method for implementing a PL-RS count for carrier aggregation according to some aspects.
  • FIG. 9 is a flow chart of another exemplary method for implementing a PL-RS count for carrier aggregation according to some aspects.
  • FIG. 10 is a flow chart of another exemplary method for implementing a PL-RS count for carrier aggregation 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 106 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 106 may include a number of hardware structural components sized, shaped, and arranged to help in communication; such components can include antennas, antenna arrays, 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, 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.
  • Fifth generation (5G) wireless communication networks such as the New Radio (NR) wireless communication network, support communication between a base station 108 and high-end UEs 106 for a plurality of different usage cases, including, for example, enhanced mobile broadband (eMBB) and ultra-reliable and low latency communication (URLLC) .
  • NR networks may further support communication between a base station and low-end UEs 106 in massive machine-type communication (mMTC) usage cases.
  • mMTC massive machine-type communication
  • LTE-M or Narrowband Internet of Things (NB-IoT) technology may be utilized to meet the requirements of mMTC.
  • NR networks may further provide services to reduced capability UEs 106.
  • the service requirements for reduced capability UEs may be less than high-end UEs, but greater than low-end UEs.
  • use cases for reduced capability UEs may include not only URLLC services with high requirements, but also low-end services to accommodate smaller form factors and longer battery lives.
  • Examples of reduced-capability UEs may include, but are not limited to, industrial wireless sensors, surveillance cameras, and wearable devices (e.g., smart watches, rings, eHealth related devices, and medical monitoring devices) .
  • reduced capability UEs have a device design with a compact form factor and reduced complexity as compared to high-end UEs.
  • reduced capability UEs may have a reduced number of transmit/receive antennas, reduced device bandwidth (e.g., reduced operating bandwidth of the UE) , relaxed processing time, and/or relaxed processing capability.
  • Reduced capability UEs may further be configured for power saving and battery lifetime enhancement in delay tolerant use cases.
  • the particular services (e.g., eMBB/URLLC/mMTC/reduced capability) provided to a UE may be determined based on a UE category of the UE.
  • UE category information is used to enable the base station to effectively communicate with each UE served by the base station.
  • the UE category may identify the uplink and downlink performance capability of the UE.
  • the UE category may specify the maximum data rate supported by the UE, the number of component carriers and multiple-input multiple-output (MIMO) layers supported by the UE, and/or the highest modulation supported by the UE.
  • MIMO multiple-input multiple-output
  • the examples presented herein of UE category differentiators are merely exemplary, and it should be understood that any suitable differences between UE features, whether in hardware or software, may be utilized to differentiate between UE categories.
  • 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 device-to-device (D2D) fashion and/or in relay configuration.
  • D2D device-to-device
  • 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.
  • Sidelink communication may be utilized, for example, in a device-to-device (D2D) , peer-to-peer (P2P) , vehicle-to-vehicle (V2V) network, and/or vehicle-to-everything (V2X) .
  • D2D device-to-device
  • P2P peer-to-peer
  • V2V vehicle-to-vehicle
  • V2X vehicle-to-everything
  • two or more UEs e.g., UEs 226 and 228) within the coverage area of a serving base station 212 may communicate with each other using sidelink signals 227 without relaying that communication through the base station.
  • the base station 227 or one or both of the UEs 226 and 228 may function as scheduling entities to schedule sidelink communication between UEs 226 and 228.
  • the sidelink signals 227 include sidelink traffic and sidelink control.
  • UEs outside the coverage area of a base station may communicate over a sidelink carrier.
  • UE 238 is illustrated communicating with UEs 240 and 242.
  • the UE 238 may function as a scheduling entity or a transmitting sidelink device, and UEs 240 and 242 may each function as a scheduled entity or a receiving sidelink device.
  • the ability for a UE to communicate while moving, independent of its location, is referred to as mobility.
  • the various physical channels between the UE and the RAN are generally set up, maintained, and released under the control of an access and mobility management function (AMF, not illustrated, part of the core network 102 in FIG. 1) .
  • AMF access and mobility management function
  • the AMF may include a security context management function (SCMF) and a security anchor function (SEAF) that performs authentication.
  • SCMF security context management function
  • SEAF security anchor function
  • the SCMF can manage, in whole or in part, the security context for both the control plane and the user plane functionality.
  • the RAN 200 may enable mobility and handovers (i.e., the transfer of a UE’s connection from one radio channel to another) .
  • mobility and handovers i.e., the transfer of a UE’s connection from one radio channel to another.
  • a UE may monitor various parameters of the signal from its serving cell as well as various parameters of neighboring cells. Depending on the quality of these parameters, the UE may maintain communication with one or more of the neighboring cells. During this time, if the UE moves from one cell to another, or if signal quality from a neighboring cell exceeds that from the serving cell for a given amount of time, the UE may undertake a handoff or handover from the serving cell to the neighboring (target) cell.
  • target neighboring
  • UE 224 may move from the geographic area corresponding to its serving cell 202 to the geographic area corresponding to a neighbor cell 206.
  • the UE 224 may transmit a reporting message to its serving base station 210 indicating this condition.
  • the UE 224 may receive a handover command, and the UE may undergo a handover to the cell 206.
  • 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 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 or bandwidth parts (BWPs) .
  • BWPs bandwidth parts
  • 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 a 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. These 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 slot 310 may be utilized for broadcast or unicast communication.
  • a broadcast, multicast, or groupcast communication may refer to a point-to-multipoint transmission by one device (e.g., a base station, UE, or other similar device) to other devices.
  • a broadcast communication is delivered to all devices, whereas a multicast communication is delivered to multiple intended recipient devices.
  • a unicast communication may refer to a point-to-point transmission by a one device to a single other device.
  • the scheduling entity may allocate one or more REs 306 (e.g., within the control region 312) to carry DL control information including one or more DL control channels, such as a physical downlink control channel (PDCCH) , to one or more scheduled entities (e.g., UEs) .
  • the PDCCH carries downlink control information (DCI) including but not limited to power control commands (e.g., one or more open loop power control parameters and/or one or more closed loop power control parameters) , scheduling information, a grant, and/or an assignment of REs for DL and UL transmissions.
  • DCI downlink control information
  • the PDCCH may further carry 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 base station may further allocate one or more REs 306 (e.g., in the control region 312 or the data region 314) to carry other DL signals, such as a demodulation reference signal (DMRS) ; a phase-tracking reference signal (PT-RS) ; a channel state information (CSI) reference signal (CSI-RS) ; a primary synchronization signal (PSS) ; and a secondary synchronization signal (SSS) .
  • DMRS demodulation reference signal
  • PT-RS phase-tracking reference signal
  • CSI-RS channel state information reference signal
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • 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 (system) bandwidth in the frequency domain, and identify the physical cell identity (PCI) of the cell.
  • PCI physical cell identity
  • the synchronization signals PSS and SSS may be transmitted in a synchronization signal block (SSB) .
  • the PBCH may further include a master information block (MIB) that includes various system information, along with parameters for decoding a system information block (SIB) .
  • the SIB may be, for example, a SystemInformationType 1 (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.
  • Examples of 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.
  • the scheduled entity may utilize one or more REs 306 to carry UL control information (UCI) including one or more UL control channels, such as a physical uplink control channel (PUCCH) , to the scheduling entity.
  • UCI 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.
  • uplink reference signals may include a sounding reference signal (SRS) and an uplink DMRS.
  • the UCI 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 (DCI) that may schedule resources for uplink packet transmissions.
  • DCI may also include HARQ feedback, channel state feedback (CSF) , such as a CSI report, or any other suitable UCI.
  • CSF channel state feedback
  • one or more REs 306 may be allocated for data traffic. Such data 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) .
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • one or more REs 306 within the data region 314 may be configured to carry other signals, such as one or more SIBs and DMRSs.
  • the control region 312 of the slot 310 may include a physical sidelink control channel (PSCCH) including sidelink control information (SCI) transmitted by an initiating (transmitting) sidelink device (e.g., V2X or other sidelink device) towards a set of one or more other receiving sidelink devices.
  • the data region 314 of the slot 310 may include a physical sidelink shared channel (PSSCH) including sidelink data traffic transmitted by the initiating (transmitting) sidelink device within resources reserved over the sidelink carrier by the transmitting sidelink device via the SCI.
  • PSSCH physical sidelink shared channel
  • Other information may further be transmitted over various REs 306 within slot 310.
  • HARQ feedback information may be transmitted in a physical sidelink feedback channel (PSFCH) within the slot 310 from the receiving sidelink device to the transmitting sidelink device.
  • PSFCH physical sidelink feedback channel
  • one or more reference signals such as a sidelink SSB and/or a sidelink CSI-RS, may be transmitted within the slot 310.
  • Transport channels carry blocks of information called transport blocks (TB) .
  • TBS transport block size
  • MCS modulation and coding scheme
  • 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.
  • 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, a scheduled entity, 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 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 beam or receive beam) along a spatial path between the transmitter 402 and the receiver 406. Beamforming may be achieved by combining the signals communicated via antennas 404 or 408 (e.g., antenna elements of an antenna array module) such that some of the signals experience constructive interference while others experience destructive interference. To create the desired constructive/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.
  • antennas 404 or 408 e.g., antenna elements of an antenna array module
  • a base station may generally be capable of communicating with UEs using beams of varying beam widths.
  • a base station may be configured to utilize a wider beam when communicating with a UE that is in motion and a narrower beam when communicating with a UE that is stationary.
  • the base station may transmit a reference signal, such as an SSB or CSI-RS, on each of a plurality of beams in a beam-sweeping manner.
  • SSBs may be transmitted on the wider beams
  • CSI-RSs may be transmitted on the narrower beams.
  • the UE may measure the reference signal received power (RSRP) or signal-to-interference-plus-noise ratio (SINR) on each of the beams and transmit a beam measurement report (e.g., a Layer 1 (L1) measurement report) to the base station indicating the RSRP or SINR of one or more of the measured beams.
  • a beam measurement report e.g., a Layer 1 (L1) measurement report
  • the base station may then select the particular beam for communication with the UE based on the L1 measurement report.
  • the base station may derive the particular beam 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) .
  • SRS sounding reference signal
  • beamformed signals may be utilized for most downlink channels, including the physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH) .
  • broadcast control information such as the SSB, slot format indicator (SFI) , and paging information, may be transmitted in a beam-sweeping manner to enable all scheduled entities (UEs) in the coverage area of a transmission and reception point (TRP) (e.g., a gNB) to receive the broadcast control information.
  • TRP transmission and reception point
  • 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
  • spatial multiplexing may be implemented using a coordinated multi-point (CoMP) network configuration in which transmissions from multiple transmission points (TRPs) may be simultaneously directed towards a single UE.
  • TRPs transmission points
  • multiple TRPs may or may not be co-located and may or may not be within a same cell.
  • Each of the multiple TRPs may transmit the same or different data to a user equipment (UE) .
  • UE user equipment
  • transmission reliability may be improved.
  • each TRP may utilize the same carrier frequency to communicate with a UE.
  • each TRP may utilize a different carrier frequency (referred to as a component carrier) and carrier aggregation may be performed at the UE.
  • the multi-TRP transmission scheme may be referred to as a multi-carrier or multi-cell transmission scheme.
  • FIG. 5 is a conceptual diagram illustrating an example of a multi-cell transmission environment 500 according to some aspects.
  • the multi-cell transmission environment 500 includes a primary serving cell (PCell) 502 and one or more secondary serving cells (SCells) 506a, 506b, 506c, and 506d.
  • the PCell 502 may be referred to as the anchor cell that provides a radio resource control (RRC) connection to the UE.
  • RRC radio resource control
  • the PCell and the SCell may be co-located (e.g., different TRPs at the same location) .
  • one or more of the SCells 506a –506d may be activated or added to the PCell 502 to form the serving cells serving a user equipment (UE) 510.
  • Each serving cell corresponds to a component carrier (CC) .
  • the CC of the PCell 502 may be referred to as a primary CC, and the CC of a SCell 506a –506d may be referred to as a secondary CC.
  • the PCell 502 and one or more of the SCells 506 may be served by a respective base station 504 and 508a –508c or scheduling entity similar to those illustrated in any of FIGs. 1 and 2. In the example shown in FIG.
  • SCells 506a –506c are each served by a respective base station 508a –508c.
  • SCell 506d is co-located with the PCell 502.
  • base station 504 may include multiple TRPs, each supporting a different carrier.
  • the coverage of the PCell 502 and SCell 506d may differ since component carriers in different frequency bands may experience different path loss.
  • the PCell 502 may add or remove one or more of the SCells 506a –506d to improve reliability of the connection to the UE 510 and/or increase the data rate.
  • the PCell 502 may be changed upon a handover to another PCell.
  • the PCell 502 may be a low band cell
  • the SCells 506 may be high band cells.
  • a low band (LB) cell uses a CC in a frequency band lower than that of the high band cells.
  • the high band cells may use mmWave CC
  • the low band cell may use a CC in a band (e.g., sub-6GHz band) lower than mmWave.
  • a cell using a mmWave CC can provide greater bandwidth than a cell using a low band CC.
  • beamforming may be used to transmit and receive signals.
  • the PCell 502 or the PCell 502 and one or more of the SCells may form a master cell group (MCG) and the remaining SCells (e.g., SCells 506a, 506b, and 506c) may form a secondary cell group (SCG) .
  • MCG master cell group
  • SCells 506a, 506b, and 506c secondary cell group
  • the PCell and SCell 502d may utilize a first radio access technology (RAT) , such as LTE, while the remaining SCells 506a–506c may utilize a second RAT, such as 5G-NR.
  • RAT radio access technology
  • 5G-NR 5G-NR
  • the multi-cell transmission environment may be referred to as a multi-RAT –dual connectivity (MR-DC) environment.
  • MR-DC multi-RAT –dual connectivity
  • MR-DC Evolved-Universal Terrestrial Radio Access New Radio dual connectivity
  • EN-DC Evolved-Universal Terrestrial Radio Access New Radio dual connectivity
  • the UE may be simultaneously connected to both LTE and NR or to LTE for the control plane and NR for the user plane.
  • the LTE RAT serves as the anchor carrier that allows FR1/FR2 carriers to be added.
  • a UE can perform initial registration with an LTE base station (e.g., evolved Node B (eNB) ) , such as eNB 504 (via cell 502) , and then add one or more secondary LTE cells (e.g., cell 502d) as part of the MCG, and one or more secondary 5G NR cells (e.g., one or more 5G base stations, referred to herein as g Node Bs (gNBs) ) , such as cells 506a–506c, that collectively form the SCG.
  • LTE base station e.g., evolved Node B (eNB)
  • eNB 504 via cell 502
  • secondary LTE cells e.g., cell 502d
  • secondary 5G NR cells e.g., one or more 5G base stations, referred to herein as g Node Bs (gNBs)
  • gNBs 5G base stations
  • the UE 510 may transmit an uplink signal (e.g., a PUCCH or PUSCH) on one of the component carriers (CC) using an uplink transmit power that may be controlled based on a path loss between the UE 510 and the serving cell of a cell group (e.g., the MCG or the SCG) .
  • the UE 510 may calculate the uplink transmit power for an uplink transmission based on the estimated or measured path loss, a transmit power control (TPC) command received from the serving cell (e.g., the PCell 502 for the MCG or one of the SCells 502a–502c in the SCG) , and other suitable parameters (e.g., the amount of information to be transmitted, etc. ) .
  • the path loss can be measured or estimated, for example, by measuring the received power of a path loss reference signal (PL-RS) .
  • PL-RS path loss reference signal
  • Examples of PL-RS include, but are not limited to, SSBs and CSI
  • the UE 510 may maintain up to four PL-RS per serving cell.
  • the maintained PL-RS may include PL-RSs configured by the serving cell via radio resource control (RRC) signaling or medium access control (MAC) control element (MAC-CE) activation, and default PL-RSs on the UE 510.
  • RRC radio resource control
  • MAC-CE medium access control control element
  • the PL-RS can be associated with either the serving cell itself (e.g., PCell 502) or another serving cell, such as a special cell (SPCell) when the serving cell is a secondary cell (e.g., SCell 502d) .
  • Each PL-RS may be identified by a unique identifier.
  • the unique identifier may include one or more of a reference signal identifier (e.g., a CSI-RS resource indicator (CRI) or SSB resource indicator (SSBRI) ) , a bandwidth part identifier (BWPID) , or a component carrier identifier (CCID) .
  • a reference signal identifier e.g., a CSI-RS resource indicator (CRI) or SSB resource indicator (SSBRI)
  • BWPID bandwidth part identifier
  • CCID component carrier identifier
  • the UE 510 may be configured to count a total number of PL-RSs within a cell group that are maintained by the UE.
  • the UE 510 may further be configured to verify that the total number of PL-RSs is less than or equal to a threshold.
  • the threshold may be equal to the number of component carriers in the cell group multiplied by a component carrier limit on the number of PL-RSs that may be associated with each component carrier in the cell group.
  • the component carrier limit may be four. As such, in each cell group, the total number of maintained unique PL-RSs across all component carriers within a cell group is no more than the number of component carriers multiplied by four.
  • the component carrier limit may be UE-specific.
  • the component carrier limit may be a UE capability number reported to the serving cell.
  • the UE capability number can range from one to four.
  • the threshold may represent a cross-CC limit.
  • the number of PL-RSs maintained on a particular component carrier may be greater than (e.g., exceed) the component carrier limit as long as the total number of PL-RS maintained by the UE across all component carriers is less than or equal to the threshold.
  • the number of PL-RSs maintained on a particular component carrier may be less than the component carrier limit.
  • the UE 510 may be configured to count a respective number of PL-RSs maintained for each component carrier in a cell group. The UE 510 may further be configured to verify that the respective number of PL-RSs maintained for each component carrier is less than or equal to a component carrier threshold.
  • the component carrier threshold may be equal to four. As such, in each cell group, the total number of maintained unique PL-RSs within each component carrier is no more than four.
  • the component carrier threshold may be UE-specific.
  • the component carrier threshold may be a UE capability number reported to the serving cell. The UE capability number can range from one to four.
  • the maintained PL-RS on one component carrier of the cell group may be utilized for uplink transmission power control on another component carrier of the cell group.
  • the UE 510 may be configured to count a respective number of applied PL-RSs applied to respective uplink transmission power control for each component carrier within a cell group. The UE 510 may further be configured to verify that the respective number of PL-RSs applied to the respective uplink power control for each component carrier is less than or equal to the component carrier threshold.
  • the component carrier threshold may be equal to four, and may represent a per-CC limit. As such, in each cell group, the total number of maintained PL-RSs for power control applied to uplink transmission in each component carrier is no more than four.
  • the component carrier threshold may be UE-specific.
  • the component carrier threshold may be a UE capability number reported to the serving cell. The UE capability number can range from one to four. In some examples, if a PL-RS is utilized for uplink transmission power control in two different component carriers, that PL-RS is counted as an applied PL-RS in each of the component carriers.
  • FIG. 6 is a diagram illustrating examples of maintained and applied PL-RSs in a carrier aggregation (CA) network configuration 600 according to some aspects.
  • the CA network configuration 600 includes two component carriers CC0 602a and CC1 602b. Across both the of the component carriers 602a and 602b, there are five PL-RSs 604 (PLSR0, PLSR1, PLSR2, PLSR3, and PLSR4) maintained for a wireless communication device (e.g., a UE) .
  • One of the PL-RSs 604 (e.g., PLRS4) is maintained for CC1, while the remaining PL-RSs 604 (e.g., PLRS0, PLRS1, PLRS2, and PLRS3) are maintained for CC0.
  • the remaining PL-RSs 604 e.g., PLRS0, PLRS1, PLRS2, and PLRS3 are maintained for CC0.
  • CC0 and CC1 may collectively form a cell group (e.g., a MCG or a SCG) .
  • CC0 may be associated with a PCell of a MCG or a primary secondary cell (PSCell) of a SCG
  • CC1 may be associated with an SCell of the MCG or SCG.
  • Each PL-RS 604 is a downlink reference signal that may correspond, for example, to an SSB or CSI-RS transmitted on the corresponding component carrier 602a or 602b of the cell group to the wireless communication device.
  • the wireless communication device may be configured to measure the path loss on each of the PL-RSs 604 and to utilize the measured path loss to control the uplink transmission power of one or more uplink signals 606 (UL0, UL1, UL2, UL3, and UL4) .
  • Each of the uplink signals 606 may correspond, for example, to a PUCCH, a SRS, a PRACH, or a PUSCH transmission.
  • the PL-Rs 604 maintained for a particular component carrier 602a or 602b may be utilized for uplink transmission power control on that particular component carrier.
  • the wireless communication device may be configured to utilize the measured path loss on PLRS1 maintained for CC0 for uplink transmission power control of UL4 on CC0.
  • PLRS4 maintained for CC1 may be utilized for uplink transmission power control of UL2 on CC1. Therefore, PLRS1 may be considered an applied PL-RS 604 on CC0 since PLRS1 is applied to UL4 on CC0 for uplink transmission power control Similarly, PLRS4 may be considered an applied PL-RS 604 on CC1 since PLRS4 is applied to UL2 on CC1 for uplink transmission power control.
  • the PL-RS 604 maintained for one component carrier may be utilized for uplink transmission power control on another component carrier (e.g., component carrier 602b) .
  • the wireless communication device may be configured to utilize the measured path loss on PLRS0 maintained for CC0 for uplink transmission power control of UL0 on CC1.
  • PLRS1 maintained for CC0 may be utilized for uplink transmission power control of UL1 on CC1.
  • PLRS3 maintained for CC0 may be utilized for uplink transmission power control of UL3 on CC1.
  • PLRS0, PLRS1, and PLRS3 may be considered applied PL-RSs 604 on CC1 since each of these PL-RSs 604 is applied to uplink transmission power control of an uplink signal 606 on CC1.
  • PL-RSs 604 e.g., PLRS0, PLRS1, PLRS3, and PLRS4
  • PLRS1 applied PL-RS 604
  • PLRS1 is utilized for uplink transmission power control on both CC0 and CC1, PLRS1 is counted twice (e.g., PLRS1 is counted as an applied PL-RS on CC0 and as an applied PL-RS on CC1) .
  • FIG. 7 is a conceptual diagram illustrating an example of a hardware implementation for an exemplary wireless communication device 700 employing a processing system 714.
  • the wireless communication device 700 may be a user equipment (UE) or other scheduled entity as illustrated in any one or more of FIGs. 1, 2, 4 and/or 5 configured for communication in a wireless communication network (e.g., a 5G NR access network) .
  • UE user equipment
  • 5G NR access network e.g., a 5G NR access network
  • the wireless communication device 700 may be implemented with a processing system 714 that includes one or more processors 704.
  • processors 704 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 wireless communication device 700 may be configured to perform any one or more of the functions described herein. That is, the processor704, as utilized in a wireless communication device 700, may be used to implement any one or more of the processes described below.
  • the processor 704 may in some instances be implemented via a baseband or modem chip and in other implementations, the processor 704 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 714 may be implemented with a bus architecture, represented generally by the bus 702.
  • the bus 702 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 714 and the overall design constraints.
  • the bus 702 communicatively couples together various circuits including one or more processors (represented generally by the processor 704) , a memory 705, and computer-readable media (represented generally by the computer-readable medium 706) .
  • the bus 702 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 708 provides an interface between the bus 702, a transceiver 710, and an antenna array 720.
  • the antenna array 720 may be a single panel antenna array or a multi-panel antenna array.
  • the transceiver 710 provides a means for communicating with various other apparatus over a transmission medium (e.g., air interface) .
  • a user interface 712 e.g., keypad, display, touchscreen, speaker, microphone, control knobs, etc.
  • a user interface 712 is optional, and may be omitted in some examples.
  • the processor 704 is responsible for managing the bus 702 and general processing, including the execution of software stored on the computer-readable medium 706.
  • the software when executed by the processor 704, causes the processing system 714 to perform the various functions described below for any particular apparatus.
  • the computer-readable medium 706 and the memory 705 may also be used for storing data that is manipulated by the processor 704 when executing software.
  • One or more processors 704 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 706.
  • the computer-readable medium 706 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 706 may reside in the processing system 714, external to the processing system 714, or distributed across multiple entities including the processing system 714.
  • the computer-readable medium 706 may be embodied in a computer program product.
  • the computer-readable medium 706 may be part of the memory 705.
  • a computer program product may include a computer-readable medium in packaging materials.
  • the processor 704 may include circuitry configured for various functions.
  • the processor 704 may include communication and processing circuitry 742 configured to communicate within a cell group utilizing a plurality of component carrier via the transceiver 710.
  • the communication and processing circuitry 742 may be configured to communicate with one or more transmission and reception points (TRPs) (e.g., base stations, such as eNBs and/or gNBs) , each serving a respective cell within the cell group.
  • TRPs transmission and reception points
  • Each of the TRPs may utilizing a different component carrier of the plurality of component carriers for communication with the wireless communication device 700.
  • the cell group may include, for example, a master cell group (MCG) or a secondary cell group (SCG) .
  • MCG master cell group
  • SCG secondary cell group
  • the communication and processing circuitry 742 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 742 may be configured to exchange control information and data within the cell group via one or more subframes, slots, and/or mini-slots and one or more bandwidth parts (BWPs) .
  • BWPs bandwidth parts
  • the communication and processing circuitry 742 may be configured to receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control.
  • the message may configure each PL-RS on a respective component carrier.
  • the message may configure a PL-RS as a maintained (e.g., active) PL-RS on a particular component carrier.
  • the message may be received from a TRP associated with a serving cell within the cell group.
  • the serving cell may include a primary cell (PCell) of the MCG or a primary secondary cell (PSCell) of the SCG.
  • the serving cell may include a special cell (SPCell) corresponding to a secondary cell (SCell) in the cell group.
  • the message may include, for example, a radio resource control (RRC) message or a medium access control (MAC) control element (MAC-CE) activation message.
  • RRC radio resource control
  • MAC-CE medium access control control element
  • the RRC message may configure a new PL-RS for one of the component carriers.
  • the MAC-CE activation message may activate a previously configured PL-RS for one of the component carriers.
  • the communication and processing circuitry 742 may further be configured to store a list of maintained PL-RSs per component carrier (CC) 716 within, for example, memory 705.
  • the maintained PL-RSs 716 for a particular component carrier may include those PL-RSs configured by the network (e.g., via RRC signaling or MAC-CE) or default PL-RSs stored in the memory 705.
  • Each maintained PL-RS 716 may be identified by a unique identifier.
  • the unique identifier may include one or more of a reference signal identifier (e.g., a CSI-RS resource indicator (CRI) or SSB resource indicator (SSBRI) ) , a bandwidth part identifier (BWPID) , or a component carrier identifier (CCID) .
  • a reference signal identifier e.g., a CSI-RS resource indicator (CRI) or SSB resource indicator (SSBRI)
  • BWPID bandwidth part identifier
  • CCID component carrier identifier
  • the communication and processing circuitry 742 may further be configured to receive one or more PL-RSs (e.g., SSBs and/or CSI-RSs) on one or more of the component carriers using the antenna array 720 and transceiver 710.
  • the communication and processing circuitry 742 may further be configured transmit an uplink signal (e.g., PUCCH, SRS, PRACH, or PUSCH) on one of the component carriers utilizing an uplink transmit power determined based on the received PL-RS (s) .
  • the communication and processing circuitry 742 may be configured to select a particular PL-RS in the maintained PL-RS (s) 716 to apply to uplink transmission power control of the uplink signal.
  • the selected PL-RS to apply may be configured by the network (e.g., within an uplink grant for the uplink signal) .
  • the applied PL-RS may be one of the maintained PL-RSs 716 for the component carrier on which the uplink signal is transmitted or may be a maintained PL-RS 716 for another component carrier.
  • the communication and processing circuitry 742 may further be configured to store a list of applied PL-RSs per component carrier (CC) 718 within, for example, memory 705.
  • the applied PL-RSs 718 for each component carrier may include the maintained PL-RSs 716 applied to uplink transmission power control on each component carrier.
  • the applied PL-RSs for a particular component carrier may include one or more maintained PL-RSs for that particular component carrier and/or one or more maintained PL-RSs for other component carrier (s) .
  • the communication and processing circuitry 742 may further be configured to execute communication and processing software 752 stored in the computer-readable medium 706 to implement one or more of the functions described herein.
  • the processor 704 may further include PL-RS measurement circuitry 744, configured to control the antenna array 720 and transceiver 710 to receive a PL-RS (e.g., SSB or CSI-RS) and measure a respective received power (e.g., RSRP) of the PL-RS.
  • the PL-RS measurement circuitry 744 may further be configured to execute PL-RS measurement software 754 stored in the computer-readable medium 706 to implement one or more of the functions described herein.
  • the processor 704 may further include power control circuitry 746, configured to control a power source 730 (e.g., a battery) .
  • the power control circuitry 746 can utilize the power source 730 for uplink transmission power control of an uplink signal to be transmitted on one of the component carriers via the transceiver 710 and antenna array 720.
  • the power control circuitry 746 may be configured to calculate the uplink transmit power of the uplink signal based on the path loss measured by the PL-RS measurement circuitry 744 of a particular PL-RS applied to the uplink signal.
  • the power control circuitry 746 may further consider a transmit power control (TPC) command received from the serving cell and other suitable parameters (e.g., the amount of information to be transmitted, etc.
  • TPC transmit power control
  • the applied PL-RS for uplink transmission power control of the uplink signal may be selected by the communication and processing circuitry 742, as discussed above.
  • the power control circuitry 746 may further be configured to execute power control software 756 stored in the computer-readable medium 706 to implement one or more of the functions described herein.
  • the processor 704 may further include counting circuitry 748, configured to count a total number of maintained PL-RS (s) 716 across all component carriers within the cell group.
  • the counting circuitry 748 may further be configured to count a respective number of maintained PL-RS (s) 716 maintained for each component carrier of the plurality of component carriers utilized for communication in the cell group.
  • the counting circuitry 748 may further be configured to count a respective number of applied PL-RS (s) 718 applied to uplink transmission power control for each component carrier of the plurality of component carriers utilized for communication in the cell group.
  • the counting circuitry 748 may be triggered to count the maintained PL-RS (s) 716 and/or applied PL-RS (s) 718 upon receiving a message from the network configuring at least one PL-RS maintained at the wireless communication device. In some examples, the counting circuitry 748 may be triggered to count the applied PL-RS (s) 718 upon applying one of the maintained PL-RS (s) 716 to uplink transmission power control of an uplink signal (e.g., based on network configuration) . The counting circuitry 748 may further be configured to execute counting software 758 stored in the computer-readable medium 706 to implement one or more of the functions described herein.
  • the processor 704 may further include verification circuitry 750, configured to verify the counted number of PL-RS (s) counted by the counting circuitry 748 is less than or equal to a threshold 715.
  • the threshold 715 may include a total threshold for comparison to the total number of maintained PL-RSs and an individual component carrier threshold for comparison to the per-CC number of maintained or applied PL-RSs.
  • the total threshold may be equal to the number of component carriers in the cell group multiplied by a component carrier limit on the number of PL-RSs that may be associated with each component carrier in the cell group.
  • the component carrier limit may be four. In other examples, the component carrier limit may be UE-specific.
  • the component carrier limit may be a UE capability number reported to the serving cell (e.g., a number between one and four) .
  • the component carrier threshold may be four.
  • the component carrier threshold may be UE-specific (e.g., between one and four) .
  • the threshold (s) 715 may further be maintained, for example, in memory 705.
  • the verification circuitry 750 may be configured to verify that the total number of maintained PL-RSs 716 counted by the counting circuitry 748 is less than or equal to the total threshold 715. In addition, the verification circuitry 750 may be configured to verify that the respective number PL RSs maintained for each component carrier of the plurality of component carriers is less than or equal to the component carrier threshold 715. Furthermore, the verification circuitry 750 may be configured to verify that the respective number of applied PL RSs applied to uplink power control for each component carrier of the plurality of component carriers is less than or equal to the component carrier threshold.
  • the verification circuitry 750 may be configured to verify both the total number of maintained PL-RSs is less than or equal to the total threshold and one or more of the number of maintained PL-RSs per CC or number of applied PL-RSs per CC is less than or equal to the component carrier threshold. In other examples, the verification circuitry 750 may be configured to verify only the total number of maintained PL-RSs, only the number of maintained PL-RSs per CC, or only the number of applied PL-RSs per CC. Other verification combinations are also possible depending on the particular implementation. The verification circuitry 750 may further be configured to execute verification software 760 stored in the computer-readable medium 706 to implement one or more of the functions described herein.
  • FIG. 8 is a flow chart 800 of an exemplary method for implementing a PL-RS count for carrier aggregation according to some aspects. 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 wireless communication device 700, as described above and illustrated in FIG. 7, by a processor or processing system, or by any suitable means for carrying out the described functions.
  • the wireless communication device may communicate within a cell group utilizing a plurality of component carriers.
  • the cell group may be a MCG or a SCG that includes two or more cells, each communicating on one of the component carriers of the plurality of component carriers.
  • the communication and processing circuitry 742 and transceiver 710 shown and described above in connection with FIG. 7, may communicate within the cell group utilizing a plurality of component carriers.
  • the wireless communication device may receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers.
  • the PL-RSs may include SSBs or CSI-RSs transmitted on one or more of the component carriers in the cell group.
  • each of the plurality of PL-RSs has a unique identifier associated therewith.
  • the unique identifier can include at least one of a reference signal identifier, a bandwidth part identifier, or a component carrier identifier.
  • the message include an RRC message or a MAC-CE activation message.
  • the communication and processing circuitry 742 and transceiver 710 shown and described above in connection with FIG. 7, may receive the message configuring the PL-RS.
  • the wireless communication device may count a total number of the plurality of PL-RSs maintained at the wireless communication device.
  • the total number of maintained PL-RSs may include all PL-RSs maintained across each of the component carriers for uplink transmission power control.
  • the counting circuitry 748 shown and described above in connection with FIG. 7, may count the total number of maintained PL-RSs.
  • the wireless communication device may verify the total number of the plurality of PL-RSs is less than or equal to a threshold.
  • the threshold is equal to a first number of the plurality of component carriers multiplied by a second number of PL-RSs associated with each component carrier of the plurality of component carriers.
  • the second number of PL-RSs associated with each component carrier is four.
  • the second number of PL-RSs associated with each component carrier corresponds to a reported capability of the wireless communication device.
  • a third number of the plurality of PL RSs maintained for a first component carrier of the plurality of component carriers is greater than or less than the second number of PL-RSs associated with each component carrier of the plurality of component carriers.
  • the number of PL-RSs maintained on a particular component carrier may be greater than (e.g., exceed) the second number of PL-RSs associated with each component carrier (e.g., the component carrier limit) as long as the total number of PL-RS maintained by the UE across all component carriers is less than or equal to the threshold.
  • the number of PL-RSs maintained on a particular component carrier may be less than the component carrier limit.
  • the verification circuitry 950 shown and described above in connection with FIG. 7, may verify the total number of maintained PL-RSs is less than or equal to the threshold.
  • FIG. 9 is a flow chart 900 of an exemplary method for implementing a PL-RS count for carrier aggregation according to some aspects. 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 wireless communication device 700, as described above and illustrated in FIG. 7, by a processor or processing system, or by any suitable means for carrying out the described functions.
  • the wireless communication device may communicate within a cell group utilizing a plurality of component carriers.
  • the cell group may be a MCG or a SCG that includes two or more cells, each communicating on one of the component carriers of the plurality of component carriers.
  • the communication and processing circuitry 742 and transceiver 710 shown and described above in connection with FIG. 7, may communicate within the cell group utilizing a plurality of component carriers.
  • the wireless communication device may receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers.
  • the PL-RSs may include SSBs or CSI-RSs transmitted on one or more of the component carriers in the cell group.
  • each of the plurality of PL-RSs has a unique identifier associated therewith.
  • the unique identifier can include at least one of a reference signal identifier, a bandwidth part identifier, or a component carrier identifier.
  • the message include an RRC message or a MAC-CE activation message.
  • the communication and processing circuitry 742 and transceiver 710 shown and described above in connection with FIG. 7, may receive the message configuring the PL-RS.
  • the wireless communication device may count a respective number of the plurality of PL-RSs maintained for each component carrier of the plurality of component carriers.
  • the counting circuitry 748 shown and described above in connection with FIG. 7, may count the respective number of maintained PL-RSs per component carrier.
  • the wireless communication device may verify the respective number of the plurality of PL RSs maintained for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • the component carrier threshold is four.
  • the wireless communication device may further utilize a first PL-RS of the plurality of PL-RSs maintained for a first component carrier of the plurality of component carriers for the uplink transmission power control on a second component carrier of the plurality of component carriers.
  • the verification circuitry 950 shown and described above in connection with FIG. 7, may verify the respective number of maintained PL-RSs per component carrier is less than or equal to the component carrier threshold.
  • FIG. 10 is a flow chart 1000 of an exemplary method for implementing a PL-RS count for carrier aggregation according to some aspects. 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 wireless communication device 700, as described above and illustrated in FIG. 7, by a processor or processing system, or by any suitable means for carrying out the described functions.
  • the wireless communication device may communicate within a cell group utilizing a plurality of component carriers.
  • the cell group may be a MCG or a SCG that includes two or more cells, each communicating on one of the component carriers of the plurality of component carriers.
  • the communication and processing circuitry 742 and transceiver 710 shown and described above in connection with FIG. 7, may communicate within the cell group utilizing a plurality of component carriers.
  • the wireless communication device may receive a message configuring at least one path loss reference signal (PL-RS) of a plurality of PL-RSs maintained at the wireless communication device for uplink transmission power control on the plurality of component carriers.
  • the PL-RSs may include SSBs or CSI-RSs transmitted on one or more of the component carriers in the cell group.
  • each of the plurality of PL-RSs has a unique identifier associated therewith.
  • the unique identifier can include at least one of a reference signal identifier, a bandwidth part identifier, or a component carrier identifier.
  • the message include an RRC message or a MAC-CE activation message.
  • the communication and processing circuitry 742 and transceiver 710 shown and described above in connection with FIG. 7, may receive the message configuring the PL-RS.
  • the wireless communication device may count a respective number of applied PL-RSs of the plurality of PL-RSs applied to respective uplink transmission power control for each component carrier of the plurality of component carriers.
  • the counting circuitry 748 shown and described above in connection with FIG. 7, may count the respective number of maintained PL-RSs per component carrier.
  • the wireless communication device may verify the respective number of applied PL RSs applied to the respective uplink power control for each component carrier of the plurality of component carriers is less than or equal to a component carrier threshold.
  • the component carrier threshold is four.
  • a first number of applied PL-RSs of the plurality of PL-RSs for a first component carrier of the plurality of component carriers and a second number of applied PL-RSs of the plurality of PL-RSs for a second component carrier of the plurality of component carriers each include a same PL-RS of the plurality of PL-RSs.
  • a single PL-RS may be counted twice, once for each component carrier on which the PL-RS is applied to uplink transmission power control.
  • the verification circuitry 950 shown and described above in connection with FIG. 7, may verify the respective number of applied PL-RSs per component carrier is less than or equal to the component carrier threshold.
  • the wireless communication device includes various means as described in the present disclosure.
  • the aforementioned means may be the processor 704 shown in FIG. 7 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 704 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 storage medium 706, or any other suitable apparatus or means described in any one of the FIGS. 1, 2, 4, and/or 5, and utilizing, for example, the processes and/or algorithms described herein.
  • 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. 1–10 One or more of the components, steps, features and/or functions illustrated in FIGs. 1–10 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 5, and/or 7 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 présente invention concernent la mise en œuvre d'un comptage de signaux de référence d'affaiblissement de chemin (PL-RS) pour une agrégation de porteuses. Un dispositif de communication sans fil (par exemple, un UE) gère une pluralité de PL-RS utilisés pour une commande de puissance d'émission en liaison montante sur une pluralité de porteuses de composant dans un groupe de cellules. Le dispositif de communication sans fil peut être configuré pour compter le nombre total de PL-RS gérés parmi toutes les porteuses de composant. Le dispositif de communication sans fil peut en outre être configuré pour compter le nombre respectif de PL-RS gérés pour chaque porteuse de composant ou le nombre respectif de PL-RS appliqués à chaque porteuse de composant pour une commande de puissance d'émission en liaison montante. Le dispositif de communication sans fil peut en outre être configuré pour vérifier que le nombre compté de PL-RS est inférieur ou égal à un seuil. D'autres aspects, caractéristiques et modes de réalisation sont également revendiqués et décrits.
PCT/CN2020/089237 2020-05-08 2020-05-08 Comptage de signaux de référence d'affaiblissement de chemin dans une agrégation de porteuses WO2021223231A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111092710A (zh) * 2019-11-08 2020-05-01 中兴通讯股份有限公司 发送参数确定方法、电子装置、设备及介质

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111092710A (zh) * 2019-11-08 2020-05-01 中兴通讯股份有限公司 发送参数确定方法、电子装置、设备及介质

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
APPLE INC: "Views on Rel-16 eMIMO UE feature list", 3GPP DRAFT; R1-2002353, vol. RAN WG1, 11 April 2020 (2020-04-11), pages 1 - 6, XP051875568 *
LG ELECTRONICS: "Discussion on RAN1 UE feature for NR eMIMO", 3GPP DRAFT; R1-2002161, vol. RAN WG1, 9 April 2020 (2020-04-09), pages 1 - 6, XP051870453 *
LG ELECTRONICS: "Outcome of email thread [100e-NR-eMIMO-MB-02]", 3GPP DRAFT; R1-2001260, vol. RAN WG1, 4 March 2020 (2020-03-04), pages 1 - 5, XP051858974 *
LG ELECTRONICS: "Summary of discussion topic B on Rel-16 MB1", 3GPP DRAFT; R1-2001173, vol. RAN WG1, 24 February 2020 (2020-02-24), pages 1 - 3, XP051853719 *

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