WO2021253207A1 - Autorisation configurée améliorée pour transmission en liaison montante à réalité augmentée - Google Patents

Autorisation configurée améliorée pour transmission en liaison montante à réalité augmentée Download PDF

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Publication number
WO2021253207A1
WO2021253207A1 PCT/CN2020/096262 CN2020096262W WO2021253207A1 WO 2021253207 A1 WO2021253207 A1 WO 2021253207A1 CN 2020096262 W CN2020096262 W CN 2020096262W WO 2021253207 A1 WO2021253207 A1 WO 2021253207A1
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WIPO (PCT)
Prior art keywords
resource
resource allocation
computer
configuration
configurations
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PCT/CN2020/096262
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English (en)
Inventor
Bo Chen
Krishna Kiran Mukkavilli
Hao Xu
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Qualcomm Incorporated
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Priority to PCT/CN2020/096262 priority Critical patent/WO2021253207A1/fr
Publication of WO2021253207A1 publication Critical patent/WO2021253207A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to enhanced configured grant for extended reality (XR) uplink transmission.
  • XR extended reality
  • Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are usually multiple access networks, support communications for multiple users by sharing the available network resources.
  • UTRAN Universal Terrestrial Radio Access Network
  • the UTRAN is the radio access network (RAN) defined as a part of the Universal Mobile Telecommunications System (UMTS) , a third generation (3G) mobile phone technology supported by the 3rd Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • 3GPP 3rd Generation Partnership Project
  • multiple-access network formats include Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, and Single-Carrier FDMA (SC-FDMA) networks.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal FDMA
  • SC-FDMA Single-Carrier FDMA
  • a wireless communication network may include a number of base stations or node Bs that can support communication for a number of user equipments (UEs) .
  • a UE may communicate with a base station via downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the base station to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the base station.
  • a base station may transmit data and control information on the downlink to a UE and/or may receive data and control information on the uplink from the UE.
  • a transmission from the base station may encounter interference due to transmissions from neighbor base stations or from other wireless radio frequency (RF) transmitters.
  • RF radio frequency
  • a transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with the neighbor base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink.
  • a method of wireless communication includes receiving, at a user equipment (UE) , a configured grant (CG) configuration message with at least one CG configuration including a plurality of CG resource allocations and a plurality of modulation and coding schemes (MCSs) , wherein each CG resource allocation of the plurality of CG resource allocations corresponds to an MCS of the plurality of MCSs, determining, at the UE, information for uplink transmission, identifying, by the UE, a CG resource allocation of the plurality of CG resource allocations for a CG transmission, and transmitting, by the UE, the information in the CG transmission using the CG resource allocation, wherein the information is transmitted at a corresponding MCS corresponding to the CG resource allocation.
  • CG configured grant
  • an apparatus configured for wireless communication includes means for receiving, at a UE, a CG configuration message with at least one CG configuration including a plurality of CG resource allocations and a plurality of MCSs, wherein each CG resource allocation of the plurality of CG resource allocations corresponds to an MCS of the plurality of MCSs, means for determining, at the UE, information for uplink transmission, means for identifying, by the UE, a CG resource allocation of the plurality of CG resource allocations for a CG transmission, and means for transmitting, by the UE, the information in the CG transmission using the CG resource allocation, wherein the information is transmitted at a corresponding MCS corresponding to the CG resource allocation.
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code further includes code to receive, at a UE, a CG configuration message with at least one CG configuration including a plurality of CG resource allocations and a plurality of MCSs, wherein each CG resource allocation of the plurality of CG resource allocations corresponds to an MCS of the plurality of MCSs, code to determine, at the UE, information for uplink transmission, code to identify, by the UE, a CG resource allocation of the plurality of CG resource allocations for a CG transmission, and code to transmit, by the UE, the information in the CG transmission using the CG resource allocation, wherein the information is transmitted at a corresponding MCS corresponding to the CG resource allocation.
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to receive, at a UE, a CG configuration message with at least one CG configuration including a plurality of CG resource allocations and a plurality of MCSs, wherein each CG resource allocation of the plurality of CG resource allocations corresponds to an MCS of the plurality of MCSs, to determine, at the UE, information for uplink transmission, to identify, by the UE, a CG resource allocation of the plurality of CG resource allocations for a CG transmission, and to transmit, by the UE, the information in the CG transmission using the CG resource allocation, wherein the information is transmitted at a corresponding MCS corresponding to the CG resource allocation.
  • FIG. 1 is a block diagram illustrating details of a wireless communication system.
  • FIG. 2 is a block diagram illustrating a design of a base station and a UE configured according to one aspect of the present disclosure.
  • FIGs. 3A and 3B are block diagrams illustrating uplink transmissions between an extended reality (XR) UE and a base station occurring in pre-Release 16 (Rel. 16) (FIG. 3A) and post-Rel. 16 (FIG. 3B) functionality.
  • XR extended reality
  • FIGs. 4A and 4B are block diagrams illustrating timing of XR uplink data transmissions between an XR UE and a base station over scheduled grant (SG) (FIG. 4A) and CG (FIG. 4B) operations.
  • SG scheduled grant
  • FIG. 4B CG
  • FIG. 5 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure.
  • FIG. 6 is a call flow diagram illustrating communications between an XR UE and a base station according to one aspect of the CG configuration enhancement of the present disclosure.
  • FIG. 7 is a block diagram illustrating communications between an XR UE and a base station according to one aspect of the CG configuration enhancement of the present disclosure.
  • FIG. 8 is a block diagram illustrating a UE configured according to one aspect of the present disclosure.
  • wireless communications networks This disclosure relates generally to providing or participating in authorized shared access between two or more wireless communications systems, also referred to as wireless communications networks.
  • the techniques and apparatus may be used for wireless communication networks such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, 5 th Generation (5G) or new radio (NR) networks, as well as other communications networks.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • LTE long-term evolution
  • GSM Global System for Mobile communications
  • 5G 5 th Generation
  • NR new radio
  • An OFDMA network may implement a radio technology such as evolved UTRA (E-UTRA) , IEEE 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E-UTRA evolved UTRA
  • GSM Global System for Mobile Communications
  • LTE long term evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP)
  • cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP 3rd Generation Partnership Project
  • 3GPP long term evolution LTE
  • UMTS universal mobile telecommunications system
  • the 3GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices.
  • the present disclosure is concerned with the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond with shared access to wireless spectrum between networks using a collection of new and different radio access technologies or radio air interfaces.
  • 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that may be implemented using an OFDM-based unified, air interface.
  • further enhancements to LTE and LTE-A are considered in addition to development of the new radio technology for 5G NR networks.
  • the 5G NR will be capable of scaling to provide coverage (1) to a massive Internet of things (IoTs) with an ultra-high density (e.g., ⁇ 1M nodes/km 2 ) , ultra-low complexity (e.g., ⁇ 10s of bits/sec) , ultra-low energy (e.g., ⁇ 10+ years of battery life) , and deep coverage with the capability to reach challenging locations; (2) including mission-critical control with strong security to safeguard sensitive personal, financial, or classified information, ultra-high reliability (e.g., ⁇ 99.9999%reliability) , ultra-low latency (e.g., ⁇ 1 ms) , and users with wide ranges of mobility or lack thereof; and (3) with enhanced mobile broadband including extreme high capacity (e.g., ⁇ 10 Tbps/km 2 ) , extreme data rates (e.g., multi-Gbps rate, 100+Mbps user experienced rates) , and deep awareness with advanced discovery and optimizations.
  • IoTs Internet of things
  • ultra-high density
  • the 5G NR may be implemented to use optimized OFDM-based waveforms with scalable numerology and transmission time interval (TTI) ; having a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) /frequency division duplex (FDD) design; and with advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • TTI transmission time interval
  • MIMO massive multiple input, multiple output
  • mmWave millimeter wave
  • Scalability of the numerology in 5G NR with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • subcarrier spacing may occur with 15 kHz, for example over 1, 5, 10, 20 MHz, and the like bandwidth.
  • subcarrier spacing may occur with 30 kHz over 80/100 MHz bandwidth.
  • the subcarrier spacing may occur with 60 kHz over a 160 MHz bandwidth.
  • subcarrier spacing may occur with 120 kHz over a 500 MHz bandwidth.
  • the scalable numerology of the 5G NR facilitates scalable TTI for diverse latency and quality of service (QoS) requirements. For example, shorter TTI may be used for low latency and high reliability, while longer TTI may be used for higher spectral efficiency.
  • QoS quality of service
  • 5G NR also contemplates a self-contained integrated subframe design with uplink/downlink scheduling information, data, and acknowledgement in the same subframe.
  • the self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive uplink/downlink that may be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet the current traffic needs.
  • an aspect disclosed herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways.
  • an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein.
  • such an apparatus may be implemented or such a method may be practiced using other structure, functionality, or structure and functionality in addition to or other than one or more of the aspects set forth herein.
  • a method may be implemented as part of a system, device, apparatus, and/or as instructions stored on a computer readable medium for execution on a processor or computer.
  • an aspect may comprise at least one element of a claim.
  • FIG. 1 is a block diagram illustrating an example of a wireless communications system 100 that supports an enhanced configured grant (CG) operation, in which the CG configuration message received by UEs 115 include at least one CG configuration that includes multiple CG resource allocations with corresponding modulation and coding scheme (MCS) values in accordance with aspects of the present disclosure. Different MCS values may be assigned and correspond to different CG resource allocations. When determining a CG resource for uplink transmissions, UEs 115 may select the CG resource that has the corresponding MCS value to support the uplink transmission.
  • the wireless communications system 100 includes base stations 105, UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or NR network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-A Pro
  • NR NR network
  • wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low-complexity devices.
  • ultra-reliable e.g., mission critical
  • Base stations 105 may wirelessly communicate with UEs 115 via one or more base station antennas.
  • Base stations 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or some other suitable terminology.
  • Wireless communications system 100 may include base stations 105 of different types (e.g., macro or small cell base stations) .
  • the UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like.
  • Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 is supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via communication links 125, and communication links 125 between a base station 105 and a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Downlink transmissions may also be referred to as forward link transmissions while uplink transmissions may also be referred to as reverse link transmissions.
  • the geographic coverage area 110 for a base station 105 may be divided into sectors making up a portion of the geographic coverage area 110, and each sector may be associated with a cell.
  • each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof.
  • a base station 105 may be movable and, therefore, provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.
  • the term “cell” refers to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) , and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) ) operating via the same or a different carrier.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC) , narrowband Internet-of-things (NB-IoT) , enhanced mobile broadband (eMBB) , or others) that may provide access for different types of devices.
  • MTC machine-type communication
  • NB-IoT narrowband Internet-of-things
  • eMBB enhanced mobile broadband
  • the term “cell” may refer to a portion of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.
  • UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client.
  • a UE 115 may also be a personal electronic device such as a cellular phone (UE 115a) , a personal digital assistant (PDA) , a wearable device (UE 115d) , a tablet computer, a laptop computer (UE 115g) , or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may also refer to a wireless local loop (WLL) station, an Internet-of-things (IoT) device, an Internet-of-everything (IoE) device, an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles (UE 115e and UE 115f) , meters (UE 115b and UE 115c) , or the like.
  • WLL wireless local loop
  • IoT Internet-of-things
  • IoE Internet-of-everything
  • Some UEs 115 may be low cost or low complexity devices, and may provide for automated communication between machines (e.g., via machine-to-machine (M2M) communication) .
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to humans interacting with the program or application.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) . In some examples, half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power saving “deep sleep” mode when not engaging in active communications, or operating over a limited bandwidth (e.g., according to narrowband communications) . In other cases, UEs 115 may be designed to support critical functions (e.g., mission critical functions) , and a wireless communications system 100 may be configured to provide ultra-reliable communications for these functions.
  • critical functions e.g., mission critical functions
  • a UE 115 may also be able to communicate directly with other UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol) .
  • P2P peer-to-peer
  • D2D device-to-device
  • One or more of a group of UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105, or be otherwise unable to receive transmissions from a base station 105.
  • groups of UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 may facilitate the scheduling of resources for D2D communications.
  • D2D communications may be carried out between UEs 115 without the involvement of a
  • Base stations 105 may communicate with the core network 130 and with one another.
  • base stations 105 may interface with the core network 130 through backhaul links 132 (e.g., via an S1, N2, N3, or other interface) .
  • Base stations 105 may communicate with one another over backhaul links 134 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) .
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) , which may include at least one mobility management entity (MME) , at least one serving gateway (S-GW) , and at least one packet data network (PDN) gateway (P-GW) .
  • the MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC.
  • User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW.
  • the P-GW may provide IP address allocation as well as other functions.
  • the P-GW may be connected to the network operators IP services.
  • the operators IP services may include access to the Internet, Intranet (s) , an IP multimedia subsystem (IMS) , or a packet-switched (PS) streaming service.
  • IMS
  • At least some of the network devices may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC) .
  • Each access network entity may communicate with UEs 115 through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP) .
  • TRP transmission/reception point
  • various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 105) .
  • Wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features. However, the waves may penetrate structures sufficiently for a macro cell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter range (e.g., less than 100 km) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • Wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band.
  • SHF region includes bands such as the 5 GHz industrial, scientific, and medical (ISM) bands, which may be used opportunistically by devices that may be capable of tolerating interference from other users.
  • ISM bands 5 GHz industrial, scientific, and medical bands
  • Wireless communications system 100 may also operate in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band.
  • EHF extremely high frequency
  • wireless communications system 100 may support millimeter wave (mmW) communications between UEs 115 and base stations 105, and EHF antennas of the respective devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate use of antenna arrays within a UE 115.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. Techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • Wireless communications system 100 may include operations by different network operating entities (e.g., network operators) , in which each network operator may share spectrum.
  • a network operating entity may be configured to use an entirety of a designated shared spectrum for at least a period of time before another network operating entity uses the entirety of the designated shared spectrum for a different period of time.
  • certain resources e.g., time
  • a network operating entity may be allocated certain time resources reserved for exclusive communication by the network operating entity using the entirety of the shared spectrum.
  • the network operating entity may also be allocated other time resources where the entity is given priority over other network operating entities to communicate using the shared spectrum.
  • These time resources, prioritized for use by the network operating entity may be utilized by other network operating entities on an opportunistic basis if the prioritized network operating entity does not utilize the resources. Additional time resources may be allocated for any network operator to use on an opportunistic basis.
  • Access to the shared spectrum and the arbitration of time resources among different network operating entities may be centrally controlled by a separate entity, autonomously determined by a predefined arbitration scheme, or dynamically determined based on interactions between wireless nodes of the network operators.
  • wireless communications system 100 may use both licensed and unlicensed radio frequency spectrum bands.
  • wireless communications system 100 may employ license assisted access (LAA) , LTE-unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (NR-U) , such as the 5 GHz ISM band.
  • LAA license assisted access
  • LTE-U LTE-unlicensed
  • NR-U unlicensed band
  • UE 115 and base station 105 of the wireless communications system 100 may operate in a shared radio frequency spectrum band, which may include licensed or unlicensed (e.g., contention-based) frequency spectrum.
  • UEs 115 or base stations 105 may traditionally perform a medium-sensing procedure to contend for access to the frequency spectrum.
  • UE 115 or base station 105 may perform a listen before talk (LBT) procedure such as a clear channel assessment (CCA) prior to communicating in order to determine whether the shared channel is available.
  • LBT listen before talk
  • CCA clear channel assessment
  • a CCA may include an energy detection procedure to determine whether there are any other active transmissions on the shared channel. For example, a device may infer that a change in a received signal strength indicator (RSSI) of a power meter indicates that a channel is occupied. Specifically, signal power that is concentrated in a certain bandwidth and exceeds a predetermined noise floor may indicate another wireless transmitter.
  • RSSI received signal strength indicator
  • a CCA also may include message detection of specific sequences that indicate use of the channel. For example, another device may transmit a specific preamble prior to transmitting a data sequence.
  • an LBT procedure may include a wireless node adjusting its own backoff window based on the amount of energy detected on a channel and/or the acknowledge/negative-acknowledge (ACK/NACK) feedback for its own transmitted packets as a proxy for collisions.
  • ACK/NACK acknowledge/negative-acknowledge
  • a first category no LBT or CCA is applied to detect occupancy of the shared channel.
  • a second category (CAT 2 LBT) , which may also be referred to as an abbreviated LBT, a single-shot LBT, or a 25- ⁇ s LBT, provides for the node to perform a CCA to detect energy above a predetermined threshold or detect a message or preamble occupying the shared channel.
  • the CAT 2 LBT performs the CCA without using a random back-off operation, which results in its abbreviated length, relative to the next categories.
  • a third category performs CCA to detect energy or messages on a shared channel, but also uses a random back-off and fixed contention window. Therefore, when the node initiates the CAT 3 LBT, it performs a first CCA to detect occupancy of the shared channel. If the shared channel is idle for the duration of the first CCA, the node may proceed to transmit. However, if the first CCA detects a signal occupying the shared channel, the node selects a random back-off based on the fixed contention window size and performs an extended CCA. If the shared channel is detected to be idle during the extended CCA and the random number has been decremented to 0, then the node may begin transmission on the shared channel.
  • CAT 3 LBT performs CCA to detect energy or messages on a shared channel, but also uses a random back-off and fixed contention window. Therefore, when the node initiates the CAT 3 LBT, it performs a first CCA to detect occupancy of the shared channel. If the shared channel is idle for the duration of the first CCA, the no
  • the node decrements the random number and performs another extended CCA.
  • the node would continue performing extended CCA until the random number reaches 0. If the random number reaches 0 without any of the extended CCAs detecting channel occupancy, the node may then transmit on the shared channel. If at any of the extended CCA, the node detects channel occupancy, the node may re-select a new random back-off based on the fixed contention window size to begin the countdown again.
  • a fourth category (CAT 4 LBT) , which may also be referred to as a full LBT procedure, performs the CCA with energy or message detection using a random back-off and variable contention window size.
  • the sequence of CCA detection proceeds similarly to the process of the CAT 3 LBT, except that the contention window size is variable for the CAT 4 LBT procedure.
  • base stations 105 and UEs 115 may be operated by the same or different network operating entities. In some examples, an individual base station 105 or UE 115 may be operated by more than one network operating entity. In other examples, each base station 105 and UE 115 may be operated by a single network operating entity. Requiring each base station 105 and UE 115 of different network operating entities to contend for shared resources may result in increased signaling overhead and communication latency.
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these.
  • Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD) , time division duplexing (TDD) , or a combination of both.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • wireless communications system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115) , where the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas.
  • MIMO communications may employ multipath signal propagation to increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream, and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams.
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • MU-MIMO multiple-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam or receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying certain amplitude and phase offsets to signals carried via each of the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • a base station 105 may use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with a UE 115. For instance, some signals (e.g. synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station 105 multiple times in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.
  • some signals e.g. synchronization signals, reference signals, beam selection signals, or other control signals
  • Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.
  • Some signals may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) .
  • the beam direction associated with transmissions along a single beam direction may be determined based at least in in part on a signal that was transmitted in different beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions, and the UE 115 may report to the base station 105 an indication of the signal it received with a highest signal quality, or an otherwise acceptable signal quality.
  • a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) , or transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .
  • a receiving device may try multiple receive beams when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive beams or receive directions.
  • a receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal) .
  • the single receive beam may be aligned in a beam direction determined based at least in part on listening according to different receive beam directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality based at least in part on listening according to multiple beam directions) .
  • the antennas of a base station 105 or UE 115 may be located within one or more antenna arrays, which may support MIMO operations, or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • UEs 115 and base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • HARQ feedback is one technique of increasing the likelihood that data is received correctly over a communication link 125.
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., signal-to-noise conditions) .
  • a wireless device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot, while in other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • the radio frames may be identified by a system frame number (SFN) ranging from 0 to 1023.
  • SFN system frame number
  • Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms.
  • a subframe may be further divided into 2 slots each having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods.
  • a subframe may be the smallest scheduling unit of the wireless communications system 100, and may be referred to as a transmission time interval (TTI) .
  • TTI transmission time interval
  • a smallest scheduling unit of the wireless communications system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols.
  • a symbol of a mini-slot or a mini-slot may be the smallest unit of scheduling.
  • Each symbol may vary in duration depending on the subcarrier spacing or frequency band of operation, for example.
  • some wireless communications systems may implement slot aggregation in which multiple slots or mini-slots are aggregated together and used for communication between a UE 115 and a base station 105.
  • carrier refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over a communication link 125.
  • a carrier of a communication link 125 may include a portion of a radio frequency spectrum band that is operated according to physical layer channels for a given radio access technology.
  • Each physical layer channel may carry user data, control information, or other signaling.
  • a carrier may be associated with a pre-defined frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN) ) , and may be positioned according to a channel raster for discovery by UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • E-UTRA absolute radio frequency channel number
  • Carriers may be downlink or uplink (e.g., in an FDD mode) , or be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • signal waveforms transmitted over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • the organizational structure of the carriers may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR) .
  • communications over a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding the user data.
  • a carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc. ) and control signaling that coordinates operation for the carrier.
  • acquisition signaling e.g., synchronization signals or system information, etc.
  • control signaling that coordinates operation for the carrier.
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • control information transmitted in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces) .
  • a carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of predetermined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) .
  • each served UE 115 may be configured for operating over portions or all of the carrier bandwidth.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .
  • a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .
  • a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme) .
  • the more resource elements that a UE 115 receives and the higher the order of the modulation scheme the higher the data rate may be for the UE 115.
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers) , and the use of multiple spatial layers may further increase the data rate for communications with a UE 115.
  • a spatial resource e.g., spatial layers
  • Devices of the wireless communications system 100 may have a hardware configuration that supports communications over a particular carrier bandwidth, or may be configurable to support communications over one of a set of carrier bandwidths.
  • the wireless communications system 100 may include base stations 105 and/or UEs 115 that support simultaneous communications via carriers associated with more than one different carrier bandwidth.
  • Wireless communications system 100 may support communication with a UE 115 on multiple cells or carriers, a feature which may be referred to as carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both FDD and TDD component carriers.
  • wireless communications system 100 may utilize enhanced component carriers (eCCs) .
  • eCC may be characterized by one or more features including wider carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration, or modified control channel configuration.
  • an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have a suboptimal or non-ideal backhaul link) .
  • An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum, such as NR-shared spectrum (NR-SS) ) .
  • NR-SS NR-shared spectrum
  • An eCC characterized by wide carrier bandwidth may include one or more segments that may be utilized by UEs 115 that are not capable of monitoring the whole carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power) .
  • an eCC may utilize a different symbol duration than other component carriers, which may include use of a reduced symbol duration as compared with symbol durations of the other component carriers.
  • a shorter symbol duration may be associated with increased spacing between adjacent subcarriers.
  • a device such as a UE 115 or base station 105, utilizing eCCs may transmit wideband signals (e.g., according to frequency channel or carrier bandwidths of 20, 40, 60, 80 MHz, etc. ) at reduced symbol durations (e.g., 16.67 microseconds) .
  • a TTI in eCC may consist of one or multiple symbol periods. In some cases, the TTI duration (that is, the number of symbol periods in a TTI) may be variable.
  • Wireless communications system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed spectrum bands, among others.
  • the flexibility of eCC symbol duration and subcarrier spacing may allow for the use of eCC across multiple spectrums.
  • NR shared spectrum may increase spectrum utilization and spectral efficiency, specifically through dynamic vertical (e.g., across the frequency domain) and horizontal (e.g., across the time domain) sharing of resources.
  • FIG. 2 shows a block diagram of a design of a base station 105 and a UE 115, which may be one of the base station and one of the UEs in FIG. 1.
  • a transmit processor 220 may receive data from a data source 212 and control information from a controller/processor 240.
  • the control information may be for the PBCH, PCFICH, PHICH, PDCCH, EPDCCH, MPDCCH etc.
  • the data may be for the PDSCH, etc.
  • the transmit processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the transmit processor 220 may also generate reference symbols, e.g., for the PSS, SSS, and cell-specific reference signal.
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 232a through 232t.
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a through 232t may be transmitted via the antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from the base station 105 and may provide received signals to the demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all the demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 115 to a data sink 260, and provide decoded control information to a controller/processor 280.
  • a transmit processor 264 may receive and process data (e.g., for the PUSCH) from a data source 262 and control information (e.g., for the PUCCH) from the controller/processor 280.
  • the transmit processor 264 may also generate reference symbols for a reference signal.
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modulators 254a through 254r (e.g., for SC-FDM, etc. ) , and transmitted to the base station 105.
  • the uplink signals from the UE 115 may be received by the antennas 234, processed by the demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 115.
  • the processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller/processor 240.
  • the controllers/processors 240 and 280 may direct the operation at the base station 105 and the UE 115, respectively.
  • the controller/processor 240 and/or other processors and modules at the base station 105 may perform or direct the execution of various processes for the techniques described herein.
  • the controllers/processor 280 and/or other processors and modules at the UE 115 may also perform or direct the execution of the functional blocks illustrated in FIG. 5, and/or other processes for the techniques described herein.
  • the memories 242 and 282 may store data and program codes for the base station 105 and the UE 115, respectively.
  • a scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.
  • Uplink transmissions can be dynamically scheduled via a scheduling request and an uplink grant exchange from a serving base station in a downlink control information (DCI) .
  • DCI downlink control information
  • uplink transmission may be autonomously performed by a UE corresponding to a configured grant (CG) .
  • CGs may currently occur in one of two types. In a first CG type, the uplink transmission may be semi-statically configured to operate upon receipt of the configuration signaling (e.g., radio resource control (RRC) signaling) without detection of an uplink grant in a DCI by the UE.
  • RRC radio resource control
  • the uplink transmission may be semi-persistently scheduled by a general uplink grant received in a valid, activating DCI.
  • Both configured grant type enable the UE to keeping use previously granted resources (e.g., a fixed resource allocation) for uplink transmissions until the UE receives a DCI that includes a deactivation indicator.
  • Both configured grant types can also reduce the delay in uplink transmissions as there is no scheduling request or buffer status report transmissions.
  • Both configured grant types may also further reduce downlink resource usage for DCI transmission compared to dynamically scheduled uplink transmissions.
  • FIGs. 3A and 3B are block diagrams illustrating uplink transmissions between extended reality (XR) UE 115 and base station 105 occurring in pre-Release 16 (Rel. 16) (FIG. 3A) and post-Rel. 16 (FIG. 3B) functionality.
  • Uplink data for virtual reality type XR cloud gaming includes controller information for both virtual reality split rendering and user pose information.
  • pre-Rel. 16 functionality FIG. 3A
  • CG configurations support different flows and different traffic types, but does so in different intervals.
  • controller or post information controller or post information (controller/pose information 30) is transmitted according to the same characteristics (e.g., arrival time, offset, offset, payload size, etc.
  • FIG. 3B With post-Rel. -16 functionality (FIG. 3B) multiple active CG configurations for a bandwidth part (BWP) is introduced to simultaneously support different flows and different traffic types which may differ in their characteristics (e.g., arrival time, offset, and payload size) .
  • Such functionality can support two flows of XR uplink data.
  • XR UE 115 transmits controller/pose information 30 using one characteristic while simultaneously transmitting a second flow, for example, in augmented reality (AR) type XR, for computer vision (AR split uplink traffic 31) .
  • AR augmented reality
  • Rel. 16 may allow XR UE 115 to simultaneously transmit multiple uplink flows having different transmission characteristics using multiple active CG grant configurations.
  • FIGs. 4A and 4B are block diagrams illustrating timing of XR uplink data transmissions between XR UE 115 and base station 105 over scheduled grant (SG) (FIG. 4A) and CG (FIG. 4B) operations.
  • the present examples illustrate transmissions within XR technology.
  • One of the key performance indicators for XR uplink transmissions is the “age of pose” parameter.
  • the “age of pose” parameter represents the time delay between the time the post was generated at XR UE 115 and the time the received pose was sampled at the point of rendering.
  • the pose is generated at XR UE 115 at 400 (FIG.
  • the dynamic SG-based uplink incurs additional roundtrip delay due to the scheduling request (SR) 401 and grant (402) from base station 105.
  • XR UE 115 then transmits the pose information (uplink data 403) at the next uplink opportunity.
  • Base station 105 receives and decodes the uplink transmission and processes the pose information to the render epoch at 405.
  • age of pose 406 includes the time between pose generate at 400 and the render epoch at 405.
  • the SG uplink may include the SR-grant round-trip delay but it includes control reliability by adjusting modulation and coding scheme (MCS) and resource block (RB) allocation within the SR-Grant process.
  • MCS modulation and coding scheme
  • RB resource block
  • XR UE 115 selects the CG resource allocation to transmit the pose information (UL data 407) without the SR-grant delay.
  • Base station 105 receives and decodes UL data 407 at 408 and renders the information at render epoch 409.
  • Age of pose 410 represents a shorter time without the SR-grant roundtrip delay than age of pose 406 of the SG uplink procedure (FIG. 4A) .
  • the CG uplink procedure avoids the delay in the regular handshake process e.g., sending the scheduling request and waiting for the uplink grant allocation
  • the MCS and RB allocation cannot be adapted dynamically, resulting in cell-edge UEs having to retransmit and thereby incur delay.
  • the Rel. 16 functionality allowing for multiple uplink CG configurations either for multiple traffic flows with different characteristics (e.g., arrival periodicity, offset, and payload size, etc.
  • CG configuration enhancement to support autonomous MCS selection.
  • multiple time/frequency resources corresponding to different MCS with different resource allocations, are configured in one CG configuration message.
  • Multiple CG configurations which may be configured via higher layer signaling (e.g., RRC signaling) can be activated or deactivated (e.g., via RRC signaling, DCI, or the like) for a given BWP of a serving cell.
  • RRC signaling e.g., RRC signaling
  • FIG. 5 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure. The example blocks will also be described with respect to UE 115 as illustrated in FIGs. 2 and 8.
  • FIG. 8 is a block diagram illustrating UE 115 configured according to one aspect of the present disclosure.
  • UE 115 includes the structure, hardware, and components as illustrated for UE 115 of FIG. 2.
  • controller/processor 280 which operates to execute logic or computer instructions stored in memory 282, as well as controlling the components of UE 115 that provide the features and functionality of UE 115.
  • UE 115 under control of controller/processor 280, transmits and receives signals via wireless radios 800a-r and antennas 252a-r.
  • Wireless radios 800a-r includes various components and hardware, as illustrated in FIG. 2 for UE 115, including modulator/demodulators 254a-r, MIMO detector 256, receive processor 258, transmit processor 264, and TX MIMO processor 266.
  • a UE receives a CG configuration message with at least one CG configuration including a plurality of CG resource allocations and a plurality of MCSs, wherein each CG resource allocation of the plurality of CG resource allocations corresponds to an MCS of the plurality of MCSs.
  • a UE such as UE 115, may receive the control signaling, including a CG configuration message, from a serving base station via antennas 252a-r and wireless radios 800a-r.
  • UE 115 Upon decoding the message, UE 115 stores the configuration parameters at CG configuration 801, in memory 282.
  • the configuration parameters includes each of the CG resource allocations and corresponding MCS values assigned to each such resource allocation.
  • the UE determines information for uplink transmission.
  • UE 115 may determine that uplink data exists for transmission in data 804, in memory 282. Upon determining such uplink data for transmission, UE 115 may being preparation for transmission.
  • the UE identifies a CG resource allocation of the plurality of CG resource allocations for a CG transmission.
  • UE 115 under control of controller/processor 280, executes measurement logic 802, stored in memory 282.
  • the functionality and procedures enabled by execution of the logic steps and component control (referred to herein as the “execution environment” of measurement logic 802) provides UE 115 with the functionality and ability to measure detected signals received via antennas 252a-r and wireless radios 800a-r to determine the channel quality and associated transmission characteristics that the measured channel quality may support.
  • UE 115 determines such channel quality information and regularly reports such information back to a serving base station.
  • UE 115 identifies the current channel quality measurements and selects a CG resource allocation having a corresponding MCS value that corresponds to a transmission characteristic of the current channel measurements.
  • the UE transmits the information in the CG transmission using the CG resource allocation, wherein the information is transmitted at a corresponding MCS corresponding to the CG resource allocation.
  • UE 115 selects the CG resource allocation and associated MCS value, UE 115, under control of controller/processor 280, transmits the data in data 802 via wireless radios 800a-r and antennas 252a-r.
  • FIG. 6 is a call flow diagram illustrating communications between XR UE 115 and base station 105 according to one aspect of the CG configuration enhancement of the present disclosure.
  • base station 105 transmits a CG configuration message to XR UE 115.
  • the CG configuration message includes configuration for multiple time/frequency resources, which correspond to different MCS and RB allocations.
  • the CG configuration message may also explicitly include the number of time/frequency resources, N, in one CG configuration.
  • the number of time/frequency resources configured per CG configuration may either be explicit, with a field including N, or implicit, as the configuration of the multiple, N, time/frequency resources. Multiple of these CG configurations can be activated or deactivated for a given BWP of a serving cell.
  • base station 105 sends activation/deactivation signaling (e.g., via RRC signaling, DCI, etc. ) to activate or deactivate the particular CG configuration for a BWP serviced by base station 105.
  • both XR UE 115 and base station 105 determine the hybrid automatic repeat request (HARQ) process configuration associated with the configured and activated CG configurations and related active time/frequency resources.
  • HARQ hybrid automatic repeat request
  • the current maximum number of uplink HARQ processes in NR networks is 16.
  • the maximum number of time/frequency resources and HARQ processes available per CG configuration would then depend on the number of CG configurations and the periodicity of each. Therefore, by increasing the time/frequency resources of each CG configuration, the maximum number of time/frequency resources and HARQ processes per CG configuration decreases.
  • the maximum number of time/frequency resources, N is shown in the optional equations below:
  • Each time/frequency resource configuration within the CG configuration may include at least the following parameters: an indication of the frequency domain resource allocation, an indication of the modulation order, target code rate and transport block (TB) size, an index of the uplink power control (e.g., P0, PUSCH, and AlphaSet) to be used for the corresponding time/frequency resource, an indication of a combination of start symbol and length and uplink (e.g., PUSCH) mapping type, selection of resource block group (RBG) size for the uplink transmission, a redundancy version (RV) sequence, and the number of repetitions K.
  • XR UE 115 may select a CG resource that has a corresponding MCS and RB allocation that allows for transmissions according to the current channel quality measurements. XR UE 115 then transmits its uplink data at 604 to base station 105 over the selected CG resource at the corresponding MCS.
  • HARQ process ID Determination In the case of multiple active CG configurations, each of which is configured with multiple time/frequency resources, XR UE 115 may transmit the uplink data at 604 based on one of the time/frequency resources in one of multiple active CG configurations. XR UE 115 and base station 105 should have common understanding on which HARQ process identifier ID is assigned to each resource in a CG uplink transmission. The HARQ process ID should be unique for each selected time/frequency resource in one of multiple active CG configurations. XR UE 115 and base station 105 make this determination at 602 when determining the HARQ process configuration.
  • the determination of which HARQ process ID is uniquely configured for each time/frequency resource may be based on a predetermined pattern known to both XR UE 115 and base station 105. Still other example aspects may provide a formula for determining the unique allocation of each HARQ process ID to time/frequency resource.
  • FIG. 7 is a block diagram illustrating communications between XR UE 115 and base station 105 according to one aspect of the CG configuration enhancement of the present disclosure.
  • XR UE 115 and base station 105 determine the HARQ process configuration at 602 by solving a known equation to identify the allocation of HARQ process ID to time/frequency resource in one of multiple active CG configurations. The determination is based on the following equation:
  • base station 105 transmits the CG configuration message including two CG configurations, each allocated with two time/frequency resources.
  • the first CG configuration is configured for a period of 7 symbols, four HARQ processes, a HARQ process offset of 0, and a starting symbol of 0, and the second CG configuration is configured for a period of 7 symbols, four HARQ processes, a HARQ process offset of 4, and a starting symbol of 4.
  • the four HARQ processes defined for the first CG configuration are divided between the two time/frequency resources.
  • process ID (PID) 0 is allocated to symbol 0, with 0 offset.
  • the next allocation of PID1 at symbol 7 of the first time/frequency resource At a period of 7 symbols, the next allocation of PID1 at symbol 7 of the first time/frequency resource.
  • PID0 and PID1 alternate allocation at the period of 7 symbols.
  • the two remaining HARQ processes of the first CG configuration that are assigned to the second time/frequency resource are alternately allocated at a period of 7 symbols with PID 2 allocated to symbols 0, 14, and 28, and PID3 allocated to symbols 7 and 21.
  • the four HARQ processes defined for the second CG configuration are also divided between the two time/frequency resources allocated to the second CG configuration. With the HARQ process offset of 4 symbols and a starting symbol of symbol 4, the four HARQ processes are alternately allocated between the two time/frequency resources with PID4 allocated at symbols 4 and 18 of the first time/frequency resource, PID5 allocated at symbols 11 and 25 of the first time/frequency resource, PID6 allocated at symbols 4 and 18 of the second time/frequency resource, and PID7 allocated at symbols 11 and 25 of the second time/frequency resource.
  • both XR UE 115 and base station 105 determine the allocation of HARQ PIDs across the CG configuration corresponding time/frequency resources.
  • a single DCI can activate/deactivate multiple CG time/frequency resources in one CG configuration.
  • control signaling overhead may be reduced.
  • a UE can then autonomously select preferred time/frequency resources having a particular corresponding MCS with a different power control parameter among multiple CG time/frequency resources in one CG configuration according to the uplink traffic buffer and channel condition.
  • additional power boosting can also be provided by a separate, related configuration for different time/frequency resources.
  • the functional blocks and modules in FIG. 5 may comprise processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof.
  • a first aspect of wireless communication may include receiving, at a UE, a CG configuration message with at least one CG configuration including a plurality of CG resource allocations and a plurality of MCSs, wherein each CG resource allocation of the plurality of CG resource allocations corresponds to an MCS of the plurality of MCSs; determining, at the UE, information for uplink transmission; identifying, by the UE, a CG resource allocation of the plurality of CG resource allocations for a CG transmission; and transmitting, by the UE, the information in the CG transmission using the CG resource allocation, wherein the information is transmitted at a corresponding MCS corresponding to the CG resource allocation.
  • a second aspect may further include receiving, by the UE, a configuration signal identifying a number of resource allocations provided in the plurality of CG resource allocations.
  • a third aspect based on the second aspect, further including identifying, by the UE, a maximum number of uplink HARQ processes available per each CG resource allocation of the plurality of CG resource allocations, wherein the maximum number is calculated as a maximum available number of uplink HARQ processes divided by the number of resource allocations.
  • the CG configuration message includes one or more of an indication of a frequency domain resource allocation; an indication of the MCS of the plurality of MCS and TB size; an index for an uplink transmission power control parameter; an indication of a start symbol and length combination; an indication of uplink transmission mapping type; a selection of RBG size; a redundancy version sequence; and a number of repetitions.
  • a fifth aspect based on the first aspect, wherein the at least one CG configuration includes a plurality of CG configurations.
  • a sixth aspect based on the fifth aspect, further including receiving, by the UE, an activation control signal that activates one or more active CG configurations of the plurality of CG configurations for a BWP of a serving cell; and receiving, by the UE a deactivation control signal that deactivate one or more deactivated CG configurations of the plurality of CG configurations for the BWP of the serving cell.
  • a seventh aspect based on the sixth aspect, further including determining, by the UE, a HARQ process ID assigned to the CG resource allocation using an equation commonly shared with a serving base station within the serving cell; and providing, by the UE, HARQ information to the serving base station according to the HARQ process ID.
  • An eighth aspect including any combination of the first through the seventh aspects.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal.
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Computer-readable storage media may be any available media that can be accessed by a general purpose or special purpose computer.
  • such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • a connection may be properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL) , then the coaxial cable, fiber optic cable, twisted pair, or DSL, are included in the definition of medium.
  • DSL digital subscriber line
  • Disk and disc includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • the term “and/or, ” when used in a list of two or more items means that any one of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed.
  • the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

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

Abstract

L'invention concerne une opération d'autorisation configurée (CG) améliorée, dans laquelle le message de configuration de CG reçu par des équipements d'utilisateur (UE) contient au moins une configuration de CG qui configure de multiples attributions de ressources de temps/fréquence CG avec des valeurs de schéma de modulation et de codage (MCS) correspondantes. Différentes valeurs de MCS peuvent être attribuées et correspondent à différentes attributions de ressources de temps/fréquence de CG. Lors de la détermination d'une ressource de temps/fréquence CG pour des transmissions en liaison montante, des UE peuvent sélectionner la ressource CG qui possède la valeur MCS correspondante pour prendre en charge la transmission en liaison montante sur la base des mesures de tampon de liaison montante et de qualité de canal.
PCT/CN2020/096262 2020-06-16 2020-06-16 Autorisation configurée améliorée pour transmission en liaison montante à réalité augmentée WO2021253207A1 (fr)

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EP4213572A1 (fr) * 2022-01-18 2023-07-19 Airspan IP Holdco LLC Technique de planification d'attributions de données de liaison descendante et d'attributions de données de liaison montante dans un réseau sans fil
WO2023211237A1 (fr) * 2022-04-28 2023-11-02 엘지전자 주식회사 Procédé et dispositif d'émission ou de réception de pusch d'autorisation configuré dans un système de communication sans fil
WO2023211175A1 (fr) * 2022-04-28 2023-11-02 엘지전자 주식회사 Procédé et dispositif pour une transmission/réception d'un pusch à octroi configuré dans un système de communication sans fil
WO2023219422A1 (fr) * 2022-05-10 2023-11-16 주식회사 케이티 Procédé et dispositif d'émission et de réception de données dans un réseau sans fil
WO2024031474A1 (fr) * 2022-08-10 2024-02-15 Zte Corporation Planification de couche physique pour des applications de réalité étendue
EP4387203A1 (fr) * 2022-12-14 2024-06-19 T-Mobile Innovations LLC Gestion de latence pour dispositifs de réalité étendue connectés au réseau
WO2024147123A1 (fr) * 2023-03-27 2024-07-11 Lenovo (Singapore) Pte. Ltd. Techniques d'indication d'occasions d'autorisation configurée inutilisées
WO2024169935A1 (fr) * 2023-02-14 2024-08-22 大唐移动通信设备有限公司 Procédé, dispositif et appareil de transmission de données

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CN105306114B (zh) * 2010-02-24 2018-11-02 三星电子株式会社 基站
WO2019147408A1 (fr) * 2018-01-23 2019-08-01 Qualcomm Incorporated Conception de communication de liaison montante autonome adaptative
WO2020051807A1 (fr) * 2018-09-12 2020-03-19 Guangdong Oppo Mobile Telecommunications Corp.,Ltd. Équipement utilisateur, station de base, et procédé de communication de véhicule à tout correspondant
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4213572A1 (fr) * 2022-01-18 2023-07-19 Airspan IP Holdco LLC Technique de planification d'attributions de données de liaison descendante et d'attributions de données de liaison montante dans un réseau sans fil
WO2023211237A1 (fr) * 2022-04-28 2023-11-02 엘지전자 주식회사 Procédé et dispositif d'émission ou de réception de pusch d'autorisation configuré dans un système de communication sans fil
WO2023211175A1 (fr) * 2022-04-28 2023-11-02 엘지전자 주식회사 Procédé et dispositif pour une transmission/réception d'un pusch à octroi configuré dans un système de communication sans fil
WO2023219422A1 (fr) * 2022-05-10 2023-11-16 주식회사 케이티 Procédé et dispositif d'émission et de réception de données dans un réseau sans fil
WO2024031474A1 (fr) * 2022-08-10 2024-02-15 Zte Corporation Planification de couche physique pour des applications de réalité étendue
EP4387203A1 (fr) * 2022-12-14 2024-06-19 T-Mobile Innovations LLC Gestion de latence pour dispositifs de réalité étendue connectés au réseau
WO2024169935A1 (fr) * 2023-02-14 2024-08-22 大唐移动通信设备有限公司 Procédé, dispositif et appareil de transmission de données
WO2024147123A1 (fr) * 2023-03-27 2024-07-11 Lenovo (Singapore) Pte. Ltd. Techniques d'indication d'occasions d'autorisation configurée inutilisées

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