WO2024040026A1 - Améliorations de déploiements intra-bandes non colocalisés - Google Patents

Améliorations de déploiements intra-bandes non colocalisés Download PDF

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Publication number
WO2024040026A1
WO2024040026A1 PCT/US2023/072167 US2023072167W WO2024040026A1 WO 2024040026 A1 WO2024040026 A1 WO 2024040026A1 US 2023072167 W US2023072167 W US 2023072167W WO 2024040026 A1 WO2024040026 A1 WO 2024040026A1
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WIPO (PCT)
Prior art keywords
component carrier
reception
transmission
instance
receivers
Prior art date
Application number
PCT/US2023/072167
Other languages
English (en)
Inventor
Valentin Alexandru Gheorghiu
Kazuki Takeda
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US18/448,767 external-priority patent/US20240056134A1/en
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of WO2024040026A1 publication Critical patent/WO2024040026A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0834—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection based on external parameters, e.g. subscriber speed or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers

Definitions

  • the technology discussed below relates generally to wireless communication systems, and more particularly, to techniques and apparatuses for improving reception of signals transmitted from different network entities (e.g., base stations).
  • network entities e.g., base stations.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • An example telecommunication standard is 5G New Radio (NR).
  • 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements.
  • 3GPP Third Generation Partnership Project
  • a network entity can transmit various signals to enable a user equipment to synchronize and connect to the network.
  • the network entity may employ techniques to reduce network side power consumption.
  • a first example provides a user equipment (UE) for wireless communication, comprising: a memory', a transceiver for wireless communication, the transceiver including a plurality of receivers, and a processor communicatively coupled to the memory and the transceiver.
  • UE user equipment
  • the processor may be configured to: (a) receive, from a first network entity, a first instance of a transmission in a first component carrier; (b) receive, from a second network entity', a second instance of the transmission in a second component carrier; and/or (c) dynamically adjust a number of receivers used for the reception of the first component carrier and the reception of the second component carrier based on whether a receive time difference, between receipt of the first instance of the transmission and receipt of the second instance of the transmission, exceeds a maximum receive time difference.
  • the first instance and second instance of the transmission may include a cyclic prefix for symbols within the transmission.
  • a first plurality of N receivers may be used for reception of the first component carrier and reception of the second component carrier if the receive time difference is less than a duration of the cyclic prefix.
  • a second plurality of N/2 receivers may be used for reception of the first component carrier and reception of the second component carrier if the receive time difference exceeds the duration of the cyclic prefix.
  • the first instance and second instance of the transmission includes a cyclic prefix for symbols within the transmission.
  • a first plurality of receivers may be used for reception of the first component carrier and reception of the second component carrier if the receive time difference is less than a duration of the cyclic prefix.
  • a second plurality of receivers may be used for reception of the first component carrier and reception of the second component carrier if the receive time difference exceeds the duration of the cyclic prefix.
  • the processor may be further configured to: (a) adjust a first channel state feedback information upon adjusting the number of receivers used for the reception of the first component carrier; and/or (b) send the updated first channel state feedback information to the first network entity .
  • the processor may be configured to: (c) adjust a second channel state feedback information upon adjusting the number of receivers used for the reception of the second component carrier; and/or (d) send the updated second channel state feedback information to the second network entity'.
  • SUBSTITUTE SHEET (RULE 26) j charnel state feedback information may include at least one of: a channel quality indicator (CQI), a rank indicator (RI), and a precoding matrix indicator (PMI).
  • CQI channel quality indicator
  • RI rank indicator
  • PMI precoding matrix indicator
  • the processor may be further configured to dynamically adjust a number of receivers used for the reception of the first component carrier and the reception of the second component carrier based on mobility state information for the UE.
  • a first plurality of receivers may be used for reception of the first component carrier and reception of the second component carrier if the mobility state information exceeds a mobility threshold.
  • a second plurality of receivers may be used for reception of the first component earner and reception of the second component carrier if the mobility state information is less than the mobility threshold.
  • the processor may be further configured to: (a) establish a first time division duplex (TDD) communication link with the first network entity; and/or (b) establish a second time division duplex (TDD) communication link with the second network entity.
  • TDD time division duplex
  • the processor may be further configured to dynamically adjust a low noise amplifier gain in a receiver chain for the first component carrier and the second component carrier based on greater power spectrums for the first component carrier and the second component carrier.
  • the low noise amplifier gain may be adjusted during symbol reception to exclude control channel information or reference signals.
  • a second example provides a method for wireless communication at a user equipment (UE), comprising: (a) receiving, from a first network entity, a first instance of a transmission in a first component carrier; (b) receiving, from a second network entity, a second instance of the transmission in a second component carrier; and/or (c) dynamically adjusting a number of receivers used for the reception of the first component carrier and the reception of the second component carrier based on whether a receive time difference, between receipt of the first instance of the transmission and receipt of the second instance of the transmission, exceeds a maximum receive time difference.
  • UE user equipment
  • a third example provides a user equipment (UE) for wireless communication, comprising: (a) means for receiving, from a first network entity, a first instance of a transmission in a first component carrier; (b) means for receiving, from a second network entity, a second instance of the transmission in a second component carrier; and/or (c)
  • UE user equipment
  • SUBSTITUTE SHEET means for dynamically adjusting a number of receivers used for the reception of the first component carrier and the reception of the second component carrier based on whether a receive time difference, between receipt of the first instance of the transmission and receipt of the second instance of the transmission, exceeds a maximum receive time difference.
  • a fourth example provides a computer-readable storage medium stored with executable code for causing a user equipment (UE) to: (a) receive, from a first network entity, a first instance of a transmission in a first component carrier; (b) receive, from a second network entity, a second instance of the transmission in a second component carrier; and/or (c) dynamically adjust a number of receivers used for the reception of the first component carrier and the reception of the second component carrier based on whether a receive time difference, between receipt of the first instance of the transmission and receipt of the second instance of the transmission, exceeds a maximum receive time difference.
  • UE user equipment
  • FIG. 1 is a schematic illustration of a wireless communication system according to some aspects.
  • FIG. 2 is an illustration of an example of a radio access network (RAN) according to some aspects.
  • RAN radio access network
  • FIG. 3 is a diagram providing a high-level illustration of one example of a configuration of a disaggregated base station according to some aspects.
  • FIG. 4 is a schematic illustration of an organization of wireless resources in an air interface utilizing orthogonal frequency divisional multiplexing (OFDM) according to some embodiments.
  • OFDM orthogonal frequency divisional multiplexing
  • FIG. 5 is a block diagram illustrating a wireless communication system supporting multiple-input multiple-output (MIMO) communication.
  • MIMO multiple-input multiple-output
  • FIG. 6 is a diagram illustrating communication between a plurality of non-collated network entities and a UE according to some aspects.
  • FIG. 7 is a diagram illustrating an example of a communication system in which non-collated network entities may transmit a signal to a UE that is capable of receiving the signal over different component carriers that have a receive time difference greater than a cyclic prefix duration.
  • FIG. 8 is a block diagram illustrating an example of a hardware implementation for a UE employing a processing system.
  • FIG. 9 is a block diagram illustrating an example of a method implemented by a UE for reception of signal transmissions.
  • SUBSTITUTE SHEET (RULE 26) devices e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail/purchasing devices, medical devices, Al-enabled devices, etc.
  • end-user devices e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail/purchasing devices, medical devices, Al-enabled devices, etc.
  • OEM original equipment manufacturer
  • devices incorporating described aspects and features may also necessarily include additional components and features for the implementation and practice of claimed and described examples.
  • 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.). It is intended that innovations described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, disaggregated arrangements (e.g., base station and UE), end-user devices, etc. of varying sizes, shapes and constitution.
  • 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, disaggregated arrangements (e.g., base station and UE), end-user devices, etc. of varying sizes, shapes and constitution.
  • a user equipment may receive a first instance of a transmission in a first component carrier from a first network entity and also receive a second instance of the transmission in a second component carrier from a second network entity.
  • the UE may then dynamically adjust a number of receivers used for the reception of the first component carrier and the reception of the second component carrier based on whether a receive time difference, between receipt of the first instance of the transmission and receipt of the second instance of the transmission, exceeds a maximum receive time difference (e.g., a cyclic prefix duration of the transmission).
  • 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 RAN 102, and a RAN 104.
  • RAN radio access network
  • SUBSTITUTE SHEET (RULE 26) 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 3 rd Generation Partnership Project (3GPP) New Radio (NR) specifications, often referred to as 5G.
  • 3GPP 3 rd 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 Long-Term Evolution (LTE).
  • eUTRAN Evolved Universal Terrestrial Radio Access Network
  • LTE Long-Term Evolution
  • the 3GPP refers to this hybrid RAN as a next-generation RAN, or NG-RAN.
  • NG-RAN next-generation RAN
  • the RAN 104 includes a plurality of network entities (e.g., base stations 108).
  • 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), a transmission and reception point (TRP), or some other suitable terminology.
  • a base station may include two or more TRPs that may be collocated or noncollocated. Each TRP may communicate on the same or different carrier frequency within the same or different frequency band.
  • the RAN 104 is further illustrated supporting wireless communication for multiple mobile apparatuses.
  • a mobile apparatus may be referred to as user equipment (UE) in 3GPP standards, but may also be referred to by those skilled in the art as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology.
  • a UE may be an apparatus (e.g., a mobile 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.
  • SUBSTITUTE SHEET broadly refers to a diverse array of devices and technologies.
  • UEs may include a number of hardware structural components sized, shaped, and arranged to help in communication; such components can include antennas, antenna arrays, radio frequency (RF) chains, amplifiers, one or more processors, etc. electrically coupled to each other.
  • RF radio frequency
  • 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” (loT).
  • a cellular (cell) phone a smart phone, a session initiation protocol (SIP) phone
  • laptop a laptop
  • PC personal computer
  • PDA personal digital assistant
  • embedded systems e.g., corresponding to an “Internet of things” (loT).
  • 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, e.g., health care at a distance.
  • Telehealth devices may include telehealth monitoring devices and telehealth administration devices, whose communication may be given preferential treatment or prioritized access over other types of information, e.g., in terms of prioritized access for transport of critical service data, and/or relevant QoS for transport of critical service data.
  • Wireless communication between a RAN 104 and a UE 106 may be described as utilizing an air interface.
  • Transmissions over the air interface from a base station (e g., base station 108) to one or more UEs (e.g., UE 106) may be referred to as downlink (DL) transmission.
  • DL downlink
  • the term downlink may refer to a point-to-multipoint transmission originating at a network entity (described further below; e.g., base station 108 or scheduling entity).
  • a network entity described further below; e.g., base station 108 or scheduling entity.
  • 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).
  • 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 scheduled entity 106 may further transmit uplink control information 118, including but not limited to a scheduling request or feedback information, or other control information to the scheduling entity 108.
  • the uplink and/or downlink control information 114 and/or 118 and/or traffic information 112 and/or 116 may be transmitted on a waveform that 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.
  • a frame may refer to a predetermined duration (e.g., 10 ms) for wireless
  • SUBSTITUTE SHEET (RULE 26) transmissions, with each frame consisting of, for example, 10 subframes of 1 ms each.
  • each frame consisting of, for example, 10 subframes of 1 ms each.
  • 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 is an illustration of an example of a RAN 200 according to some aspects.
  • 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 network entity.
  • UE user equipment
  • a network entity may be implemented in an aggregated or monolithic base station architecture (e.g., gNB), or in a disaggregated base station architecture, and may include one or more of a central unit (CU), a distributed unit (DU), a radio unit (RU), a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC), or aNon-Real Time (Non-RT) RIC.
  • a central unit CU
  • DU distributed unit
  • RU radio unit
  • RIC Near-Real Time
  • RIC Near-Real Time
  • Non-RT Non-Real Time
  • FIG. 2 illustrates cells 202, 204, 206, and 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 network entity (e.g., a 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, base station 210 and base station 212 are shown in cells 202 and 204.
  • RRH remote radio head
  • a base station in cell 206. That is, a base station can have an integrated antenna or can be connected to an antenna or RRH 216 by feeder cables.
  • cells 202, 204, and 206 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 cell 208, which may overlap with one or more macrocells.
  • the cell 208 may be referred to as a small cell (e.g., a microcell, picocell, femtocell, home base station, home Node B, home eNode B, etc.), 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 RAN 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.
  • FIG. 2 further includes an unmanned aerial vehicle (UAV) 220, which may be a quadcopter or drone.
  • UAV unmanned aerial vehicle
  • the UAV 220 may be configured to function as a base station. That is, in some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile base station such as the quadcopter 220.
  • the cells may include UEs that may be in communication with one or more sectors of each cell.
  • each base station 210, 212, 214, 218, and 220 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; UE 234 may be in communication with base station 218; and UE 236 may be in communication with mobile base station 220.
  • the UEs 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, and/or 242 may be the same as the UE/scheduled entity 106 described above and illustrated in FIG. 1.
  • the UAV 220 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) network, peer-to-peer (P2P) network, vehicle-to-vehicle (V2V) network, vehicle-to- everything (V2X) network, and/or other suitable sidelink network.
  • D2D device-to-device
  • P2P peer-to-peer
  • V2V vehicle-to-vehicle
  • V2X vehicle-to- everything
  • two or more UEs e.g., UEs 238, 240, and 242
  • the UEs 238, 240, and 242 may each function as a scheduling entity or transmitting sidelink device and/or a scheduled entity or a receiving sidelink device to schedule resources and communicate sidelink signals 237 therebetween without relying on scheduling or control information from a base station.
  • two or more UEs e.g., UEs 226 and 228, within the coverage area of a base station (e.g., base station 212) may also communicate sidelink signals 227 over a direct link (sidelink) without conveying that communication through the base station 212.
  • the base station 212 may allocate resources to the UEs 226 and 228 for the sidelink communication.
  • a D2D relay framework may be included within a cellular network to facilitate relaying of communication to/from the base station 212 via D2D links (e.g., sidelinks 227 or 237).
  • D2D links e.g., sidelinks 227 or 237).
  • one or more UEs e.g., UE 228) within the coverage area of the base station 212 may operate as relaying UEs to extend the coverage of the base station 212, improve the transmission reliability to one or more UEs (e.g., UE 226), and/or to allow the base station to recover from a failed UE link due to, for example, blockage or fading.
  • 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 network 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), which may include a security context management function (SCMF) and a security anchor function (SEAF) that perform authentication.
  • AMF access and mobility management function
  • 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 utilize DL-based mobility or UL-based mobility to enable mobility and handovers (i.e., the transfer of a UE’s
  • 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.
  • 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.
  • UL reference signals from each UE may be utilized by the network to select a serving cell for each UE.
  • the base stations 210, 212, and 214/216 may broadcast unified synchronization signals (e.g., unified Primary Synchronization Signals (PSSs), unified Secondary Synchronization Signals (SSSs) and unified Physical Broadcast Channels (PBCH)).
  • PSSs Primary Synchronization Signals
  • SSSs unified Secondary Synchronization Signals
  • PBCH Physical Broadcast Channels
  • the UEs 222, 224, 226, 228, 230, and 232 may receive the unified synchronization signals, derive the carrier frequency and slot timing from the synchronization signals, and in response to deriving timing, transmit an uplink pilot or reference signal.
  • the uplink pilot signal transmitted by a UE may be concurrently received by two or more cells (e.g., base stations 210 and 214/216) within the radio access network 200.
  • Each of the cells may measure a strength of the pilot signal, and the radio access network (e.g., one or more of the base stations 210 and 214/216 and/or a central node within the core network) may determine a serving cell for the UE 224.
  • the radio access network e.g., one or more of the base stations 210 and 214/216 and/or a central node within the core network
  • the network may continue to monitor the uplink pilot signal transmitted by the UE 224.
  • the network 200 may hand over the UE 224 from the serving cell to the neighboring cell, with or without informing the UE 224.
  • the synchronization signal transmitted by the base stations 210, 212, and 214/216 may be unified, the synchronization signal may not identify a particular cell, but rather may identify a zone of multiple cells operating on the same frequency and/or with the same timing.
  • the use of zones in 5G networks or other next generation communication networks enables the uplink-based mobility framework and improves the efficiency of both the UE and the network, since the number of mobility messages that need to be exchanged between the UE and the network may be reduced.
  • the air interface in the RAN 200 may utilize licensed spectrum, unlicensed spectrum, or shared spectrum.
  • Licensed spectrum provides for exclusive use of a portion of the spectrum, generally by virtue of a mobile network operator purchasing a license from a government regulatory body.
  • Unlicensed spectrum provides for shared use of a portion of the spectrum without the need for a governmentgranted license. While compliance with some technical rules is generally still required to access unlicensed spectrum, generally, any operator or device may gain access.
  • Shared spectrum may fall between licensed and unlicensed spectrum, wherein technical rules or limitations may be required to access the spectrum, but the spectrum may still be shared by multiple operators and/or multiple RATs.
  • the holder of a license for a portion of licensed spectrum may provide licensed shared access (LSA) to share that spectrum with other parties, e.g., with suitable licensee-determined conditions to gain access.
  • LSA licensed shared access
  • the air interface in the RAN 200 may 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.
  • Half-duplex emulation is frequently implemented for wireless links utilizing time division duplex (TDD).
  • TDD time division duplex
  • 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., several times per slot.
  • 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)
  • SUBSTITUTE SHEET (RULE 26) or spatial division duplex (SDD).
  • FDD transmissions in different directions may operate at different carrier frequencies (e.g., within paired spectrum).
  • SDD transmissions in different directions on a given channel are separated from one another using spatial division multiplexing (SDM).
  • SDM spatial division multiplexing
  • full-duplex communication may be implemented within unpaired spectrum (e.g., within a single carrier bandwidth), where transmissions in different directions occur within different sub-bands of the earner bandwidth. This t pe of full-duplex communication may be referred to herein as sub-band full duplex (SBFD), also known as flexible duplex.
  • SBFD sub-band full duplex
  • the air interface in the RAN 200 may utilize one or more multiplexing and multiple access algorithms to enable simultaneous communication of the various devices.
  • 5GNR specifications provide multiple access for UL transmissions from UEs 222 and 224 to a base station 210, and for multiplexing for DL transmissions from a 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.
  • FIG. 3 is a diagram providing a high-level illustration of one example of a configuration of a disaggregated base station 300 according to some aspects.
  • the disaggregated base station 300 includes a CU 302, one or more DUs (three of which, 304a, 304b, 304c, are shown for convenience), and one or more RUs (two of which 306a and 306b are shown for convenience).
  • Each DU 304a, 304b, and 304c can support the MAC and Radio Link Control (RLC) layers of the radio protocol stack.
  • RLC Radio Link Control
  • Each RU 306a and 306b can support the PHY layer of the radio protocol stack.
  • the CU 302 can support the higher layers, such as the Packet Data Convergence Protocol (PDCP) and RRC layers.
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Link Control
  • One of the DUs (e.g., DU 304a) may be co-located with the CU 302, while the other DUs 304b and 304c may be distributed throughout a network.
  • one of the RUs (e.g., RU 306a) may be co-located with the corresponding DU 304b, while the other RUs (e.g., RU 306b) may be distributed throughout a network.
  • the CU 302 and DUs 304a, 304b, and 304c are logically connected via the Fl interface, which utilizes the Fl Application Protocol (Fl-AP) for communication of information between the CU 302 and each of the DUs 304a, 304b, and 304c and for establishing generic tunneling protocol (GTP) tunnels between the DU and CU for each radio bearer.
  • Fl-AP Fl Application Protocol
  • GTP generic tunneling protocol
  • FIG. 4 an expanded view of an exemplary subframe 402 is illustrated, showing an OFDM resource grid.
  • PHY physical layer
  • the resource grid 404 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 404 may be available for communication.
  • the resource grid 404 is divided into multiple resource elements (REs) 406.
  • An RE which is 1 subcarrier x 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 more simply a resource block (RB) 408, which contains any suitable number of consecutive subcarriers in the frequency domain.
  • PRB physical resource block
  • RB resource block
  • 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.
  • a single RB such as the RB 408 entirely corresponds to a single direction of communication (either transmission or reception for a given device).
  • a set of continuous or discontinuous resource blocks may be referred to herein as a Resource Block Group (RBG), sub-band, or bandwidth part (BWP).
  • RBG Resource Block Group
  • BWP bandwidth part
  • a set of sub-bands or BWPs may span the entire bandwidth.
  • Scheduling of scheduled entities (e.g., UEs) for downlink, uplink, or sidelink transmissions typically involves scheduling one or more resource elements 406 within one or more sub-bands or bandwidth parts (BWPs).
  • a UE generally utilizes only a subset of the resource grid 404.
  • an RB may be the smallest unit of resources that can be allocated to a UE.
  • the RBs may be scheduled by a network entity, such as a scheduling entity or a base station (e.g., gNB, eNB, etc.), or may be self-scheduled by a UE implementing D2D sidelink communication.
  • a network entity such as a scheduling entity or a base station (e.g., gNB, eNB, etc.)
  • a base station e.g., gNB, eNB, etc.
  • the RB 408 is shown as occupying less than the entire bandwidth of the subframe 402, with some subcarriers illustrated above and below the RB 408.
  • the subframe 402 may have a bandwidth corresponding to any number of one or more RBs 408.
  • the RB 408 is shown as occupying less than the entire duration of the subframe 402, although this is merely one possible example.
  • Each 1 ms subframe 402 may consist of one or multiple adjacent slots.
  • one subframe 402 includes four slots 410, 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). 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 410 illustrates the slot 410 including a control region 412 and a data region 414.
  • the control region 412 may carry
  • SUBSTITUTE SHEET (RULE 26) control channels
  • the data region 414 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. 4 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 406 within an RB 408 may be scheduled to carry one or more physical channels, including control channels, shared channels, data channels, etc.
  • Other REs 406 within the RB 408 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 408.
  • the slot 410 may be utilized for broadcast, multicast, groupcast, 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 or groupcast communication is delivered to multiple intended recipient devices.
  • a unicast communication may refer to a point-to- point transmission by one device to a single other device.
  • the scheduling entity may allocate one or more REs 406 (e.g., within the control region 412) 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
  • 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 e.g., a grant, and/or an assignment of REs for DL and UL transmissions.
  • the PDCCH may further carry hybrid automatic repeat request (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 is confirmed, an ACK may be transmitted, whereas if not confirmed, a NACK may be
  • the transmitting device may send a HARQ retransmission, which may implement chase combining, incremental redundancy, etc.
  • the network entity may further allocate one or more REs 406 (e.g., in the control region 412 or the data region 414) 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); and a synchronization signal block (SSB).
  • SSBs may be broadcast at regular intervals based on a periodicity (e.g., 5, 10, 20, 40, 80, or 160 ms).
  • An SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast control channel (PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast control channel
  • a UE may utilize the PSS and SSS to achieve radio frame, subframe, slot, and symbol synchronization in the time domain, identify the center of the channel (system) bandwidth in the frequency domain, and identify the physical cell identity (PCI
  • the PBCH in the SSB may further include a master information block (MIB) that includes various system information, along with parameters for decoding a system information block (SIB).
  • MIB master information block
  • SIB system information block
  • the SIB may be, for example, a SyslemlnformalionType 1 (SIB1) that may include various additional system information.
  • SIB and SIB1 together provide the minimum system information (SI) for initial access.
  • Examples of system information transmitted in the MIB may include, but are not limited to, a subcarrier spacing (e.g., default downlink numerology), system frame number, a configuration of aPDCCH control resource set (CORESET) (e.g., PDCCH CORESETO), a cell barred indicator, a cell reselection indicator, a raster offset, and a search space for SIB1.
  • Examples of remaining minimum system information (RMSI) transmitted in the SIB1 may include, but are not limited to, a random access search space, a paging search space, downlink configuration information, and uplink configuration information.
  • a base station may transmit other system information (OSI) as well.
  • OSI system information
  • the scheduled entity may utilize one or more REs 406 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 406 may be allocated for data traffic. Such data traffic may be carried on one or more traffic channels, such as, for aDL 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 406 within the data region 414 may be configured to carry other signals, such as one or more SIBs and DMRSs.
  • the PDSCH may carry a plurality of SIBs, not limited to SIB1, discussed above.
  • the OSI may be provided in these SIBs, e.g., SIB2 and above.
  • the control region 412 of the slot 410 may include a physical sidelink control channel (PSCCH) including sidelink control information (SCI) transmitted by an initiating (transmitting) sidelink device (e.g., Tx V2X device or other Tx UE) towards a set of one or more other receiving sidelink devices (e.g., Rx V2X device or other Rx UE).
  • the data region 414 of the slot 410 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
  • HARQ feedback information may be transmitted in a physical sidelink feedback channel (PSFCH) within the slot 410 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, a sidelink CSI-RS, a sidelink SRS, and/or a sidelink positioning reference signal (PRS) may be transmitted within the slot 410.
  • PRS sidelink positioning reference signal
  • Transport channels carry blocks of information called transport blocks (TB).
  • TBS transport block size
  • MCS modulation and coding scheme
  • Transport channels carry blocks of information called transport blocks (TB).
  • TBS transport block size
  • MCS modulation and coding scheme
  • the scheduling entity e.g., a network entity
  • scheduled entity e.g., a UE
  • FIG. 5 illustrates an example of a wireless communication system 500 supporting MIMO.
  • a transmitter 502 includes multiple transmit antennas 504 (e.g., N transmit antennas) and a receiver 506 includes multiple receive antennas 508 (e.g., M receive antennas).
  • N transmit antennas e.g., N transmit antennas
  • M receive antennas e.g., M receive antennas
  • N x M signal paths 510 from the transmit antennas 504 to the receive antennas 508.
  • Each of the transmitter 502 and the receiver 506 may be implemented, for example, within a network entity (e.g., scheduling entity 108), a scheduled entity 106, UE, 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 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 500 is limited by the number of transmit or receive antennas 504 or 508, 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.
  • the base station may assign the rank for DL MIMO transmissions based on UL SINR measurements (e.g., based on a Sounding Reference Signal (SRS) transmitted from the UE or other pilot signal). Based on the assigned rank, the base station may then transmit CSI-RSs with separate C-RS sequences for each layer to provide for multi-layer channel estimation.
  • SRS Sounding Reference Signal
  • the UE may measure the channel quality across layers and resource blocks and feed back the RI and a channel quality indicator (CQI) that indicates to the base station a modulation and coding scheme (MCS) to use for transmissions to the UE for use in updating the rank and assigning REs for future downlink transmissions.
  • CQI channel quality indicator
  • MCS modulation and coding scheme
  • a rank-2 spatial multiplexing transmission on a 2x2 MIMO antenna configuration will transmit one data stream from each transmit antenna 504.
  • Each data stream reaches each receive antenna 508 along a different signal path 510.
  • the receiver 506 may then reconstruct the data streams using the received signals from each receive antenna 508.
  • Beamforming is a signal processing technique that may be used at the transmitter 502 or receiver 506 to shape or steer an antenna beam (e.g., a transmit beam or receive beam) along a spatial path between the transmitter 502 and the receiver 506. Beamforming may be achieved by combining the signals communicated via antennas 504
  • SUBSTITUTE SHEET (RULE 26) or 508 (e.g., antenna elements of an antenna array module) such that some of the signals experience constructive interference while others experience destructive interference.
  • the transmitter 502 or receiver 506 may apply amplitude and/or phase offsets to signals transmitted or received from each of the antennas 504 or 508 associated with the transmitter 502 or receiver 506.
  • FR1 frequency range designations FR1 (410 MHz - 7.125 GHz) and FR2 (24.25 GHz - 52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub- 6 GHz” band in various documents and articles.
  • FR2 which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • ITU International Telecommunications Union
  • FR3 7.125 GHz - 24.25 GHz
  • FR3 7.125 GHz - 24.25 GHz
  • Frequency bands falling within FR3 may inherit FR1 characteristics and/or FR2 characteristics, and thus may effectively extend features of FR1 and/or FR2 into mid-band frequencies.
  • higher frequency bands are currently being explored to extend 5GNR operation beyond 52.6 GHz.
  • FR4-a or FR4-1 52.6 GHz - 71 GHz
  • FR4 52.6 GHz - 114.25 GHz
  • FR5 114.25 GHz - 300 GHz.
  • Each of these higher frequency bands falls within the EHF band.
  • sub-6 GHz or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies.
  • millimeter wave or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and/or FR5, or may be within the EHF band.
  • beamformed signals may be utilized for most downlink channels, including the PDCCH and 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 network entity (e.g., a TRP, gNB) to receive the broadcast control information.
  • a network entity e.g., a TRP, gNB
  • beamformed signals may also be utilized for uplink channels, including the PUCCH and PUSCH.
  • beamformed signals may further be utilized in D2D systems, such as NR sidelink or V2X, utilizing FR2.
  • FIG. 6 is a diagram illustrating communication between a plurality of network entities 604 and 605 and a UE 602 using beamformed signals according to some aspects.
  • Each network entity 604 and 605 may be any of the scheduling entities or base stations (e.g., gNBs) illustrated in FIGs. 1 and/or 2, and the UE 602 may be any of the UEs or scheduled entities illustrated in FIGs. 1 and/or 2.
  • gNBs base stations
  • Each network entity 604 and/or 605 may generally be capable of communicating with the UE 602 using one or more transmit beams, and the UE 602 may further be capable of communicating with each network entity 604 and/or 605 using one or more receive beams.
  • transmit beam refers to a beam on the network entity 604 that may be utilized for downlink or uplink communication with the UE 602.
  • receive beam refers to a beam on the UE 602 that may be utilized for downlink or uplink communication with each network entity 604 and/or 605.
  • a first network entity 604 is configured to generate a plurality of transmit beams 606a-606h, each associated with a different spatial direction.
  • a second network entity 605 is configured to generate a plurality of transmit beams 607a-607c, each associated with a different spatial direction.
  • the UE 602 is configured to generate a plurality of receive beams 608a-608e, each associated wi th a different spatial direction.
  • transmit beams 606a-606h transmitted during a same symbol may not be adjacent to one another.
  • the network entities 604 and/or 605 and UE 602 may each transmit more or less beams distributed in all directions (e.g., 360 degrees) and in three dimensions.
  • the transmit beams 606a-606h may include
  • SUBSTITUTE SHEET (RULE 26) beams of varying beam width.
  • the network entity 604 may transmit certain signals (e.g., SSBs) on wider beams and other signals (e.g., CSI-RSs) on narrower beams.
  • the first network entity 604 and UE 602 may select one or more transmit beams 606a-606h on the network entity 604 and one or more receive beams 608a-608e on the UE 602 for communication of uplink and downlink signals therebetween using a beam management procedure.
  • the second network entity 605 and UE 602 may select one or more transmit beams 607a-607c on the network entity 605 and one or more receive beams 608a-608e on the UE 602 for communication of uplink and downlink signals therebetween using a beam management procedure.
  • the UE 602 may perform a Pl beam management procedure to scan the plurality of transmit beams 606a-606h on the plurality of receive beams 608a-608e to select a beam pair link (e.g., one of the transmit beams 606a-606h and one of the receive beams 608a-608e) for a physical random access channel (PRACH) procedure for initial access to the cell.
  • PRACH physical random access channel
  • periodic SSB beam sweeping may be implemented on the network entity 604 at certain intervals (e.g., based on the SSB periodicity)-
  • the netw ork entity 604 may be configured to sweep or transmit an SSB on each of a plurality of wider transmit beams 606a-606h during the beam sweeping interval.
  • the UE 602 may measure the reference signal received power (RSRP) of each of the SSB transmit beams on each of the receive beams of the UE 602 and select the transmit and receive beams based on the measured RSRP.
  • the selected receive beam may be the receive beam on which the highest RSRP is measured and the selected transmit beam may have the highest RSRP as measured on the selected receive beam.
  • the network entity 604 and UE 602 may perform a P2 beam management procedure for beam refinement at the network entity 604.
  • the network entity 604 may be configured to sweep or transmit a CSI-RS on each of a plurality of narrower transmit beams 606a-606h.
  • Each of the narrower CSI- RS beams may be a sub-beam of the selected SSB transmit beam (e.g., within the spatial direction of the SSB transmit beam).
  • Transmission of the CSI-RS transmit beams may occur periodically (e.g., as configured via radio resource control (RRC) signaling by the gNB), semi -persistently (e.g., as configured via RRC signaling and activated/deactivated via medium access control-control element (MAC-CE) signaling by the gNB), or aperiodically (e.g., as triggered by the gNB via downlink control information (DCI)).
  • RRC radio resource control
  • MAC-CE medium access control-control element
  • DCI downlink control information
  • SUBSTITUTE SHEET (RULE 26) plurality of receive beams 608a-608e.
  • the UE 602 then performs beam measurements (e.g., RSRP, SINR, etc.) of the received CSI-RSs on each of the receive beams 608a- 608e to determine the respective beam quality of each of the CSI-RS transmit beams 606a-606h as measured on each of the receive beams 608a-608e.
  • beam measurements e.g., RSRP, SINR, etc.
  • the UE 602 can then generate and transmit a Layer 1 (LI) measurement report, including the respective beam index (e.g., CSI-RS resource indicator (CRI)) and beam measurement (e.g., RSRP or SINR) of one or more of the CSI-RS transmit beams 606a- 606h on one or more of the receive beams 608a-608e to the network entity 604.
  • the network entity 604 may then select one or more CSI-RS transmit beams on which to communicate downlink and/or uplink control and/or data with the UE 602. In some examples, the selected CSI-RS transmit beam(s) have the highest RSRP from the LI measurement report.
  • Transmission of the LI measurement report may occur periodically (e.g., as configured via RRC signaling by the gNB), semi-persistently (e.g., as configured via RRC signaling and activated/deactivated via MAC-CE signaling by the gNB), or aperiodically (e.g., as triggered by the gNB via DO).
  • the UE 602 may further select a corresponding receive beam on the UE 602 for each selected serving CSI-RS transmit beam to form a respective beam pair link (BPL) for each selected serving CSI-RS transmit beam.
  • BPL beam pair link
  • the UE 602 can utilize the beam measurements obtained during the P2 procedure or perform a P3 beam management procedure to obtain new beam measurements for the selected CSI-RS transmit beams to select the corresponding receive beam for each selected transmit beam.
  • the selected receive beam to pair with a particular CSI-RS transmit beam may be the receive beam on which the highest RSRP for the particular CSI-RS transmit beam is measured.
  • the network entity 604 may configure the UE 602 to perform SSB beam measurements and provide an LI measurement report containing beam measurements of SSB transmit beams 606a-606h.
  • the network entity 604 may configure the UE 602 to perform SSB beam measurements and/or CSI-RS beam measurements for beam failure detection (BRD), beam failure recovery (BFR), cell reselection, beam tracking (e.g., for a mobile UE 602 and/or network entity 604), or other beam optimization purpose.
  • BTD beam failure detection
  • BFR beam failure recovery
  • cell reselection e.g., for a mobile UE 602 and/or network entity 604
  • the transmit and receive beams may be selected using an uplink beam management scheme.
  • the UE 602 may
  • SUBSTITUTE SHEET (RULE 26) be configured to sweep or transmit on each of a plurality of receive beams 608a-608e.
  • the UE 602 may transmit an SRS on each beam in the different beam directions.
  • the network entity 604 may be configured to receive the uplink beam reference signals on a plurality of transmit beams 606a-606h. The network entity 604 then performs beam measurements (e.g., RSRP, SINR, etc.) of the beam reference signals on each of the transmit beams 606a-606h to determine the respective beam quality of each of the receive beams 608a-608e as measured on each of the transmit beams 606a- 606h.
  • beam measurements e.g., RSRP, SINR, etc.
  • the network entity 604 may then select one or more transmit beams on which to communicate downlink and/or uplink control and/or data with the UE 602. In some examples, the selected transmit beam(s) have the highest RSRP. The UE 602 may then select a corresponding receive beam for each selected serving transmit beam to form a respective beam pair link (BPL) for each selected serving transmit beam, using, for example, a P3 beam management procedure, as described above.
  • BPL beam pair link
  • a single CSI-RS transmit beam (e.g., beam 606d) on the network entity 604 and a single receive beam (e.g., beam 608c) on the UE may form a single BPL used for communication between the network entity 604 and the UE 602.
  • multiple CSI-RS transmit beams (e.g., beams 606c, 606d, and 606e) on the network entity 604 and a single receive beam (e.g., beam 608c) on the UE 602 may form respective BPLs used for communication between the network entity 604 and the UE 602.
  • multiple CSI-RS transmit beams (e.g., beams 606c, 606d, and 606e) on the network entity 604 and multiple receive beams (e.g., beams 608c and 608d) on the UE 602 may form multiple BPLs used for communication between the network entity 604 and the UE 602.
  • a first BPL may include transmit beam 606c and receive beam 608c
  • a second BPL may include transmit beam 608d and receive beam 608c
  • a third BPL may include transmit beam 608e and receive beam 608d.
  • the UE 602 can further utilize the beam reference signals to estimate the channel quality of the channel between the network entity 604 and the UE 602.
  • the UE 602 may measure the SINR of each received CSI-RS and generate a CSI report based on the measured SINR.
  • the CSI report may include, for example, a channel quality indicator (CQI), rank indicator (RI), precoding matrix indicator (PMI), and/or layer indicator (LI).
  • the network entity e.g., gNB
  • the MCS may be selected from one or more MCS tables, each associated with a particular type of coding (e.g., polar coding, LDPC, etc.) or modulation (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64 QAM, 256 QAM, etc.).
  • BPSK binary phase shift keying
  • QPSK quadrature phase shift keying
  • QAM 16 quadrature amplitude modulation
  • the LI may be utilized to indicate which column of the precoding matrix of the reported PMI corresponds to the strongest layer codeword corresponding to the largest reported wideband CQI.
  • the network entity 604 may configure the UE 602 with one or more report settings.
  • Each report setting may be associated with a reference signal configuration indicating a configuration of one or more reference signals (e.g., CSI-RSs) for use in generating the CSI report.
  • a report setting may be associated with a combined reference signal configuration.
  • CA Carrier aggregation
  • CC component carriers
  • transmissions between the network entities 604 and 605 and the UE 602 may use a cyclic prefix to prevent intersymbol interference (ISI) when an OFDM signal is transmitted in a dispersive channel.
  • the cyclic prefix (CP) is essentially an identical copy of the last portion of the OFDM symbol appended before the OFDM symbol. This CP preserves the orthogonality of the subcarriers and prevents ISI between successive OFDM symbols.
  • FR1 Frequency Range 1
  • FR1 Frequency Range 1
  • 7G Time Division Duplex
  • SUBSTITUTE SHEET (RULE 26) component carriers (CCs) as received at the UE. Therefore, a small receive time difference (RTD) is expected between the CCs at the UE (e.g., basically within a duration of the CP of the transmissions).
  • RTD receive time difference
  • Non-collocated network entities e.g., base stations
  • the network entities may be located at distant or remote locations from each other. So there is a need to aggregate carriers that are transmitted from non-collocated network entities (carrier aggregation (CA) or such as E-UTRA- New Radio Dual Connectivity (EN-DC) or New Radio Dual Connectivity (NR-DC)).
  • CA carrier aggregation
  • EN-DC E-UTRA- New Radio Dual Connectivity
  • NR-DC New Radio Dual Connectivity
  • the receive time difference (RTD) between the CCs at the UE may be greater than an allowable maximum receive time different (MRTD). For instance, the receive time difference may exceed a duration of the CP of the transmissions.
  • RTD receive time difference
  • LNA low noise amplifier
  • the received transmission or signals should not be distorted by the LNA.
  • Distortion in the LNA may result from a large power spectrum density (PSD) difference between the CCs or LNA gain switching taking place during a useful part of the received signal (i.e., during the useful part of the symbol, not within the CP duration). Consequently, there is a need to support a maximum receive time difference between the received CCs that is larger than the CP duration.
  • PSD power spectrum density
  • FIG. 7 is a diagram illustrating an example of a communication sy stem in which non-collated network entities may transmit a signal to a UE that is capable of receiving the signal over different CCs that have a receive time difference greater than a CP duration.
  • a first network entity 702 and a second network entity 706 may establish separate wireless communication links 708 and 710 with a UE 704.
  • the first network entity 702 may send a first instance of a signal transmission in a first component carrier 612 while the second network entity 706 may send a second instance of the same signal transmission in a second component carrier. Because the first network entity 702 and second network entity 706 may be located apart from each other (e.g., at different
  • the first instance 712 and second instance 714 of the signal transmission may have a receive time difference at the receiving
  • UE 704 that is larger than the CP duration for symbols in the signal transmission.
  • the UE 704 may be moving, e.g., toward or away from one of the network entities, the power spectrum density (PSD) of the received signal transmissions 712 and 714 may change over time.
  • PSD power spectrum density
  • the UE 704 may be configured to adjust a receiver chain to utilize greater or fewer receivers to receive the component carriers from the network entities.
  • the UE 704 may adjust a low noise amplifier gain (LN A), e g., LNA gain stage switch in the receiver chain, in an uplink (UL) to downlink (DL) gap in time division duplex (TDD) systems.
  • LN A low noise amplifier gain
  • the DL to UL gaps are expected to be frequent enough (e.g., at least every 5ms) such that LNA gam switching is not too late.
  • this approach may not work in fast fading channels which are more common with high mobility UEs.
  • the UE 704 may dynamically switch or adjust the number of receivers used per CC depending on the actual receive time difference between CCs. For instance, the UE 704 may switch or adjust between four receivers per CC to two receivers per CC depending on the actual receive time difference.
  • the UE 704 may use four receivers per CC. However, if the RTD is greater than the CP duration, then UE 704 may use two receivers per CC.
  • the UE 704 may adjust or update its channel state feedback information.
  • Such channel state feedback information may include, for example, a channel quality indicator (CQI), a rank indicator (RI), a precoding matrix indicator (PMI) for each communication link with the network entities 702 and 704.
  • CQI channel quality indicator
  • RI rank indicator
  • PMI precoding matrix indicator
  • the channel state information may be sent 720 and 722 to the respective network entity 702 and 706 for each communication link or channel.
  • the UE 704 may dynamically switch or adjust the number of receivers per CC used depending on the mobility state of the UE 704. For instance, if the UE 704 is high mobility (e.g., the UE is on a car or train), the UE 704 may utilize four receivers per CC. Otherwise, the UE 704 may utilize two receivers per CC.
  • the UE 704 may dynamically adjust its low noise amplifier (LNA) gain states during reception of symbols that do not contain physical
  • LNA low noise amplifier
  • SUBSTITUTE SHEET (RULE 26) downlink control channel (PDCCH) or reference signals used for channel estimation or synchronization (DMRS, PTRS, etc.).
  • PDCCH downlink control channel
  • DMRS reference signals used for channel estimation or synchronization
  • the UE 704 may dynamically adjust its low noise amplifier (LNA) gain states during slots/symbols in which it is scheduled with lower modulation and coding scheme (MCS).
  • LNA low noise amplifier
  • the UE 704 may align the switching of its LNA gain to align with the symbol boundary of the CC with the higher received power.
  • the lower power CC will have lower MCS so distortion impact is smaller.
  • the UE 704 may subsequently perform carrier aggregation (CA) 724 using the two CCs obtained, and then obtains symbols from the aggregated signal 726.
  • CA carrier aggregation
  • FIG. 8 is a block diagram illustrating an example of a hardware implementation for a UE 800 employing a processing system 814.
  • the UE 800 may be implemented with a processing system 814 that includes one or more processors 804.
  • processors 804 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.
  • the UE 800 may be configured to perform any one or more of the functions described herein. That is, the processor 804, as utilized in a UE 800, may be used to implement any one or more of the processes and procedures described and illustrated in FIGs. 1-7, and 9.
  • the processor 804 may in some instances be implemented via a baseband or modem chip and in other implementations, the processor 804 may include a number of devices distinct and different from a baseband or modem chip (e.g., in such scenarios as may work in concert to achieve examples 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 814 may be implemented with a bus architecture, represented generally by the bus 802.
  • the bus 802 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 814 and the overall design constraints.
  • the bus 802 communicatively couples together various circuits including one or more processors (represented generally
  • a bus interface 808 provides an interface between the bus 802 and a transceiver 810.
  • the transceiver 810 provides a communication interface or means for communicating with various other apparatus over a transmission medium.
  • a user interface 812 e.g., keypad, display, speaker, microphone, joystick
  • a user interface 812 is optional, and may be omitted in some examples.
  • the transceiver 810 may include a radio chain that includes a plurality of antennas 811, a plurality of transmitters 817 and receivers 815, and a dynamically adjustable low noise amplifier (LNA) 813.
  • LNA dynamically adjustable low noise amplifier
  • the processor 804 is responsible for managing the bus 802 and general processing, including the execution of software stored on the computer-readable medium 806.
  • the software when executed by the processor 804, causes the processing system 814 to perform the various functions described below for any particular apparatus.
  • the computer-readable medium 806 and the memory 805 may also be used for storing data that is manipulated by the processor 804 when executing software.
  • One or more processors 804 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 806.
  • the computer-readable medium 806 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
  • 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 e.g., a flash memory device (e g., a card, a stick, or a key drive), a random access
  • SUBSTITUTE SHEET (RULE 26) storing software and/or instructions that may be accessed and read by a computer.
  • the computer-readable medium 806 may reside in the processing system 814, external to the processing system 814, or distributed across multiple entities including the processing system 814.
  • the computer-readable medium 806 may be embodied in a computer program product.
  • a computer program product may include a computer-readable medium in packaging materials.
  • the computer-readable medium 806 may include communication and processing instructions 852 and LNA gain adjustment instructions 854, and receiver adjustment instructions 856.
  • the processor 804 may include communication and processing circuitry 840 configured for various functions, including for example communicating with a network core (e.g., a 5G core network), scheduling entities (e.g., base stations), or any other entity, such as, for example, local infrastructure or an entity communicating with the UE 800 via the Internet, such as a network provider.
  • the communication and processing circuitry 840 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 840 may include one or more transmit/receive chains.
  • the communication and processing circuitry 840 may be configured to receive and process uplink traffic and uplink control messages (e.g., similar to uplink traffic 116 and uplink control 118 of FIG. 1), transmit and process downlink traffic and downlink control messages (e.g., similar to downlink traffic 112 and downlink control 114).
  • the communication and processing circuitry 840 may further be configured to execute communication and processing software 850 stored on the computer-readable medium 806 to implement one or more functions described herein.
  • the communication and processing circuitry 840 may obtain information from a component of the UE 800 (e.g., from the transceiver 810 that receives the information via radio frequency signaling or some other type of signaling suitable for the
  • the communication and processing circuitry 840 may output the information to another component of the processor 804, to the memory 805, or to the bus interface 808.
  • the communication and processing circuitry 840 may receive one or more of signals, messages, other information, or any combination thereof.
  • the communication and processing circuitry' 840 may receive information via one or more channels.
  • the communication and processing circuitry 840 may include functionality for a means for receiving.
  • the communication and processing circuitry 840 may include functionality for a means for processing, including a means for demodulating, a means for decoding, etc.
  • the communication and processing circuitry 840 may obtain information (e.g., from another component of the processor 804, the memory 805, or the bus interface 808), process (e.g., modulate, encode, etc.) the information, and output the processed information.
  • the communication and processing circuitry 840 may output the information to the transceiver 810 (e.g., that transmits the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium).
  • the communication and processing circuitry 840 may send one or more of signals, messages, other information, or any combination thereof.
  • the communication and processing circuitry 840 may send information via one or more channels.
  • the communication and processing circuitry 840 may include functionality for a means for sending (e.g., a means for transmitting). In some examples, the communication and processing circuitry 840 may include functionality for a means for generating, including a means for modulating, a means for encoding, etc.
  • the processor 804 may include communication and processing circuitry 842 and LNA gain adjustment circuitry 844, and receiver adjustment circuity 846.
  • FIG. 9 is a block diagram illustrating an example of a method implemented by a UE for reception of signal transmissions.
  • the UE may receive, from a first network entity, a first instance of a transmission in a first component carrier 902.
  • the UE may also receive, from a second network entity, a second instance of the transmission in a second component carrier 904.
  • the UE may then dynamically adjust a number of receivers used
  • SUBSTITUTE SHEET (RULE 26) for the reception of the first component carrier and the reception of the second component carrier based on whether a receive time difference, between receipt of the first instance of the transmission and receipt of the second instance of the transmission, exceeds a maximum receive time difference 906.
  • the first instance and second instance of the transmission includes a cyclic prefix for symbols within the transmission.
  • the UE may use a first plurality of receivers for reception of the first component carrier and reception of the second component carrier if the receive time difference is less than a duration of the cyclic prefix.
  • the UE may use a second plurality of receivers for reception of the first component carrier and reception of the second component carrier if the receive time difference exceeds the duration of the cyclic prefix.
  • the switching or adjustment of the number of receivers used for each component carrier may occur, for example, prior to reception of the component carriers.
  • the first plurality of receivers is N, where N is a positive integer greater than one (1), and the second plurality of receivers is N/2.
  • the UE may also adjust a first channel state feedback information upon adjusting the number of receivers used for the reception of the first component carrier 908 and then sends the updated first channel state feedback information to the first network entity 910.
  • the UE may also adjust a second channel state feedback information upon adjusting the number of receivers used for the reception of the second component carrier, and then sends the updated second channel state feedback information to the second network entity'.
  • the channel state feedback information may include at least one of: a channel quality indicator (CQI), a rank indicator (RI), and a preceding matrix indicator (PMI).
  • the UE may dynamically adjust a number of receivers used for the reception of the first component carrier and the reception of the second component carrier based on mobility state information for the UE. For instance, a first plurality of receivers may be used for reception of the first component carrier and reception of the second component carrier if the mobility state information exceeds a mobility threshold. Otherwise, a second plurality of receivers are used for reception of the first component carrier and reception of the second component carrier if the mobility state information is less than the mobility threshold.
  • the UE may establish a first time division duplex (TDD) communication link with the first network entity, and also establish a second time division duplex (TDD) communication link with the second network entity.
  • TDD time division duplex
  • TDD time division duplex
  • the UE may also dynamically adjust a low noise amplifier gain in a receiver chain for the first component carrier and the second component carrier based on greater power spectrums for the first component carrier and the second component carrier.
  • 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
  • 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 802. 16
  • UWB Ultra-Wideband
  • Bluetooth Ultra-Wideband
  • 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
  • SUBSTITUTE SHEET (RULE 26) 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. 1-9 One or more of the components, steps, features and/or functions illustrated in FIGs. 1-9 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. 1-9 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

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Abstract

Selon certains aspects, la divulgation concerne des techniques et des appareils pour améliorer une réception de transmissions simultanées à partir de différentes entités de réseau. Un équipement utilisateur peut recevoir une première instance d'une transmission dans une première porteuse composante en provenance d'une première entité de réseau et recevoir également une seconde instance de la transmission dans une seconde porteuse composante en provenance d'une seconde entité de réseau. L'UE peut ensuite régler dynamiquement un certain nombre de récepteurs utilisés pour la réception de la première porteuse composante et pour la réception de la seconde porteuse composante sur la base du fait qu'une différence de temps de réception, entre la réception de la première instance de la transmission et la réception de la seconde instance de la transmission, dépasse une différence de temps de réception maximale (par exemple, une durée de préfixe de cycle de la transmission).
PCT/US2023/072167 2022-08-15 2023-08-14 Améliorations de déploiements intra-bandes non colocalisés WO2024040026A1 (fr)

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Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Discussion on general RRM issues for simultaneous DL reception from different directions", vol. RAN WG4, no. Electronic Meeting; 20220815 - 20220826, 10 August 2022 (2022-08-10), XP052282588, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG4_Radio/TSGR4_104-e/Docs/R4-2213957.zip R4-2213957.docx> [retrieved on 20220810] *
NOKIA ET AL: "Discussion on RRM requirements for FR2 multi-Rx chain reception", vol. RAN WG4, no. Electronic Meeting; 20220815 - 20220825, 10 August 2022 (2022-08-10), XP052281396, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG4_Radio/TSGR4_104-e/Docs/R4-2212688.zip R4-2212688_RRM_Nokia_FR2_multiRx_DL.docx> [retrieved on 20220810] *
ZTE CORPORATION: "Discussion on RRM core requirements for simultaneous DL reception from different directions", vol. RAN WG4, no. Electronic Meeting; 20220815 - 20220826, 10 August 2022 (2022-08-10), XP052282507, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG4_Radio/TSGR4_104-e/Docs/R4-2213872.zip R4-2213872.docx> [retrieved on 20220810] *

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