WO2021248311A1 - Disponibilité d'ensembles de blocs de ressources (rb) et d'état de procédure « écouter avant de parler » (lbt) associé aux ensembles rb - Google Patents

Disponibilité d'ensembles de blocs de ressources (rb) et d'état de procédure « écouter avant de parler » (lbt) associé aux ensembles rb Download PDF

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Publication number
WO2021248311A1
WO2021248311A1 PCT/CN2020/095119 CN2020095119W WO2021248311A1 WO 2021248311 A1 WO2021248311 A1 WO 2021248311A1 CN 2020095119 W CN2020095119 W CN 2020095119W WO 2021248311 A1 WO2021248311 A1 WO 2021248311A1
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WIPO (PCT)
Prior art keywords
lbt
sets
wireless communication
communication device
configuration
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PCT/CN2020/095119
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English (en)
Inventor
Changlong Xu
Jing Sun
Xiaoxia Zhang
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Qualcomm Incorporated
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Publication date
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Priority to PCT/CN2020/095119 priority Critical patent/WO2021248311A1/fr
Publication of WO2021248311A1 publication Critical patent/WO2021248311A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • This application relates to wireless communication systems, and more particularly to an indication of an availability of one or more resource block (RB) sets and listen-before-talk (LBT) status associated with the one or more RB sets.
  • RB resource block
  • LBT listen-before-talk
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • a wireless multiple-access communications system may include a number of base stations (BSs) , each simultaneously supporting communications for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • BSs base stations
  • UE user equipment
  • NR next generation new radio
  • LTE long term evolution
  • NR next generation new radio
  • LTE long term evolution
  • NR is designed to provide a lower latency, a higher bandwidth or a higher throughput, and a higher reliability than LTE.
  • LTE long term evolution
  • NR is designed to operate over a wide array of spectrum bands, for example, from low-frequency bands below about 1 gigahertz (GHz) and mid-frequency bands from about 1 GHz to about 6 GHz, to high-frequency bands such as millimeter wave (mmWave) bands.
  • GHz gigahertz
  • mmWave millimeter wave
  • NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed and shared spectrum. Spectrum sharing enables operators to opportunistically aggregate spectrums to dynamically support high-bandwidth services. Spectrum sharing can extend the benefit of NR technologies to operating entities that may not have access to a licensed spectrum.
  • NR-U a transmitting node (e.g., a BS or a UE) may perform an LBT prior to transmitting a communication signal in an unlicensed or shared frequency band.
  • a method of wireless communication includes, at a first wireless communication device: communicating, with a second wireless communication device, a configuration indicating a first resource block (RB) set of a plurality of RB sets in a shared radio frequency band being unavailable for communication; communicating, with the second wireless communication device, a channel occupancy time-structure indicator (COT-SI) indicating a listen-before-talk (LBT) status in the shared radio frequency band; and communicating, with the second wireless communication device in one or more RB sets of the plurality of RB sets excluding the first RB set, a first communication signal based on the configuration and the COT-SI.
  • COT-SI channel occupancy time-structure indicator
  • a method of wireless communication includes, at a first wireless communication device: communicating, with a second wireless communication device, a configuration indicating a plurality of resource block (RB) sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band; communicating, with the second wireless communication device, a channel occupancy time-structure indicator (COT-SI) indicating a listen-before-talk (LBT) status in the shared radio frequency band; and communicating, with the second wireless communication device in one or more RB sets of the plurality of RB sets, a first communication signal based on the configuration and the COT-SI.
  • COT-SI channel occupancy time-structure indicator
  • an apparatus includes a transceiver configured to: communicate, by a first wireless communication device with a second wireless communication device, a configuration indicating a first resource block (RB) set of a plurality of RB sets in a shared radio frequency band being unavailable for communication; communicate, by the first wireless communication device with the second wireless communication device, a channel occupancy time- structure indicator (COT-SI) indicating a listen-before-talk (LBT) status in the shared radio frequency band; and communicate, by the first wireless communication device with the second wireless communication device in one or more RB sets of the plurality of RB sets excluding the first RB set, a first communication signal based on the configuration and the COT-SI.
  • COT-SI channel occupancy time- structure indicator
  • an apparatus includes a transceiver configured to: communicate, by a first wireless communication device with a second wireless communication device, a configuration indicating a plurality of resource block (RB) sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band; communicate, by the first wireless communication device with the second wireless communication device, a channel occupancy time-structure indicator (COT-SI) indicating a listen-before-talk (LBT) status in the shared radio frequency band; and communicate, by the first wireless communication device with the second wireless communication device in one or more RB sets of the plurality of RB sets, a first communication signal based on the configuration and the COT-S
  • COT-SI
  • a computer-readable medium having program code recorded thereon includes code for causing a first wireless communication device to communicate with a second wireless communication device, a configuration indicating a first resource block (RB) set of a plurality of RB sets in a shared radio frequency band being unavailable for communication; code for causing the first wireless communication device to communicate with the second wireless communication device, a channel occupancy time-structure indicator (COT-SI) indicating a listen-before-talk (LBT) status in the shared radio frequency band; and code for causing the first wireless communication device to communicate with the second wireless communication device in one or more RB sets of the plurality of RB sets excluding the first RB set, a first communication signal based on the configuration and the COT-SI.
  • COT-SI channel occupancy time-structure indicator
  • a computer-readable medium having program code recorded thereon includes code for causing a first wireless communication device to communicate with a second wireless communication device, a configuration indicating a plurality of resource block (RB) sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band; code for causing the first wireless communication device to communicate with the second wireless communication device, a channel occupancy time-structure indicator (COT-SI) indicating a listen-before-talk (LBT) status in the shared radio frequency band; and code for causing the first wireless communication device to communicate with the second wireless communication device in one or more RB sets of the plurality of RB sets, a
  • COT-SI channel occupancy time-
  • an apparatus includes means for communicating, with a second wireless communication device, a configuration indicating a first resource block (RB) set of a plurality of RB sets in a shared radio frequency band being unavailable for communication; means for communicating, with the second wireless communication device, a channel occupancy time-structure indicator (COT-SI) indicating a listen-before-talk (LBT) status in the shared radio frequency band; and means for communicating, with the second wireless communication device in one or more RB sets of the plurality of RB sets excluding the first RB set, a first communication signal based on the configuration and the COT-SI.
  • COT-SI channel occupancy time-structure indicator
  • an apparatus includes means for communicating, with a second wireless communication device, a configuration indicating a plurality of resource block (RB) sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band; means for communicating, with the second wireless communication device, a channel occupancy time-structure indicator (COT-SI) indicating a listen-before-talk (LBT) status in the shared radio frequency band; and means for communicating, with the second wireless communication device in one or more RB sets of the plurality of RB sets, a first communication signal based on the configuration and the COT-SI.
  • COT-SI channel occupancy time-structure indicator
  • FIG. 1 illustrates a wireless communication network according to one or more aspects of the present disclosure.
  • FIG. 2 is a timing diagram illustrating a transmission frame structure according to one or more aspects of the present disclosure.
  • FIG. 3 illustrates a configuration scheme indicating a semi-static availability and/or unavailability of one or more resource block (RB) sets of a plurality of RB sets within a frequency band according to one or more aspects of the present disclosure.
  • RB resource block
  • FIG. 4 illustrates a listen-before-talk (LBT) status communication scheme indicating an LBT status corresponding to one or more RB sets of a plurality of RB sets within a frequency band according to one or more aspects of the present disclosure.
  • LBT listen-before-talk
  • FIG. 5 illustrates an LBT status communication scheme according to one or more aspects of the present disclosure.
  • FIG. 6 illustrates an LBT status communication scheme according to one or more aspects of the present disclosure.
  • FIG. 7 illustrates a configuration scheme indicating an availability and/or unavailability of one or more RB sets of a plurality of RB sets within a frequency band according to one or more aspects of the present disclosure.
  • FIG. 8 illustrates an LBT status communication scheme indicating an LBT status corresponding to one or more RB sets of a plurality of RB sets within a frequency band according to one or more aspects of the present disclosure.
  • FIG. 9 is a block diagram of a base station (BS) according to one or more aspects of the present disclosure.
  • FIG. 10 is a block diagram of a user equipment (UE) according to one or more aspects of the present disclosure.
  • FIG. 11 is a flow diagram of a communication method according to one or more aspects of the present disclosure.
  • FIG. 12 is a flow diagram of a communication method according to one or more aspects of the present disclosure.
  • 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, Global System for Mobile Communications (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) , Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E-UTRA evolved UTRA
  • IEEE Institute of Electrical and Electronics Engineers
  • 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
  • LTE long term evolution
  • 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 a 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 millisecond (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.
  • 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 kilohertz (kHz) , for example over 5, 10, 20 megahertz (MHz) , and the like bandwidth (BW) .
  • subcarrier spacing may occur with 30 kHz over 80/100 MHz BW.
  • the subcarrier spacing may occur with 60 kHz over a 160 MHz BW.
  • subcarrier spacing may occur with 120 kHz over a 500 MHz BW.
  • 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 UL/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 UL/downlink that may be flexibly configured on a per-cell basis to dynamically switch between UL 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.
  • a resource block is formed from a number of consecutive subcarriers in frequency and a number of consecutive symbols in time.
  • RBs in an LBT bandwidth may be referred to as an RB set, and an RB set may be derived from intra-cell guard band signaling.
  • an RB set may be unavailable (e.g., semi-statically unavailable) .
  • the BS may determine that performing an LBT in the LBT bandwidth including the RB set has a low probability of resulting in an LBT pass. Such a determination that may occur if, for example, a narrow band network (e.g., Wi-Fi network) overlaps with the LBT bandwidth. Accordingly, the BS may determine that the RB set included in the LBT bandwidth is unavailable.
  • a narrow band network e.g., Wi-Fi network
  • the BS may determine not to transmit in an RB set located within two guard bands to protect the LBT bandwidth including the RB set from interference. Accordingly, the BS may determine that the RB set located between the guard bands is unavailable. Additionally, it may be necessary for the BS to perform LBT in an LBT bandwidth including an RB set that is unavailable.
  • the present disclosure provides techniques for communicating a configuration indicating a subset of a plurality of RB sets in a shared radio frequency band being unavailable and/or available for communication.
  • the plurality of RBs sets may be spaced apart from each other by one or more guard bands in the shared radio frequency band.
  • the BS may transmit the configuration to the UE using a variety of techniques.
  • the BS may transmit the configuration (e.g., RRC configuration) to the UE, where the configuration indicates a subset of the plurality of RB sets in the shared radio frequency band being unavailable for communication.
  • the configuration may include an availability bitmap including a plurality of bits, each bit corresponding to an RB set of the plurality of RB sets and indicating an availability of the corresponding RB set.
  • Each bit in the availability bitmap having a first value (e.g., bit value of 1) may indicate that an RB set corresponding to the respective bit is available
  • each bit in the availability bitmap having a second value (e.g., bit value of 0) different from the first value may indicate that an RB set corresponding to the respective bit is unavailable.
  • the BS may transmit the configuration indicating a plurality of RB sets spaced apart from each other by a guard band in the shared radio frequency band.
  • a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band
  • the second RB set and a third RB set of the plurality of RB sets are spaced apart by an aggregate guard band having a different frequency bandwidth than the first guard band.
  • the BS may determine that a fourth RB set is unavailable for communication, where the second RB set and the fourth RB set are spaced apart by a third guard band, and the third RB set and the fourth RB set are spaced apart by a fourth guard band.
  • the BS 105 configure the fourth RB set, which has been determined as being unavailable, the third guard band, and the fourth guard band into the aggregate guard band. It may be unnecessary for the configuration to indicate RB sets that are unavailable because the unavailable RB sets are configured as part of a guard band. Accordingly, each RB set of the plurality of RB sets indicated by the configuration may be indicated as available for communication.
  • the BS may perform LBT in an LBT bandwidth including an available RB set and determine not to perform LBT in an LBT bandwidth including an unavailable RB set. If the BS operates in a frequency band having a BW of about 80 MHz and is partitioned into four LBT bandwidths, with each LBT bandwidth having a BW of about 20 MHz, the BS may operate in four different LBT bandwidths.
  • the BS performs LBT independently in each LBT bandwidth and may reserve a channel occupancy time (COT) and share the COT with the UE 115 if the LBT results in an LBT pass.
  • COT channel occupancy time
  • the BS 105 may transmit in the LBT bandwidth, PDCCH carrying DCI indicating a COT-SI that provides information for sharing the COT to the UE.
  • the COT-SI may include a remaining duration of the COT and/or RB set availability and/or unavailability.
  • the COT-SI may also indicate an LBT status for each LBT result based on performing the one or more LBTs via an LBT bitmap including a plurality of bits, each bit corresponding to an RB set indicated by the configuration and indicating an LBT status for the corresponding RB set.
  • the UE 115 may receive the configuration and determine, based on the availability bitmap, which RB sets are unavailable and/or available for communication. Additionally, the UE 115 may receive the COT-SI including the LBT bitmap and determine, based on the LBT bitmap, which LBT bandwidths and/or RB sets passed LBT. The BS and the UE may communicate with each other in one or more of the available RB sets based on the communication and the COT-SI.
  • An advantage of aspects of the disclosure may provide for a single component carrier (CC) scheme for handling semi-statically unavailable RB sets instead of utilizing carrier aggregation (CA) , for example, with two CCs in two available RB sets separated by an unavailable RB set, which may have a high complexity in implementation and/or handling.
  • the UE 115 may determine in which LBT bandwidths to monitor for scheduling information from the BS and/or perform LBT based on the configuration and the COT-SI and accordingly not waste resources monitoring for scheduling information from the BS and/or performing LBT in LBT bandwidths including unavailable RB sets.
  • FIG. 1 illustrates a wireless communication network 100 according to one or more aspects of the present disclosure.
  • the network 100 may be a 5G network.
  • the network 100 includes a number of base stations (BSs) 105 (individually labeled as 105a, 105b, 105c, 105d, 105e, and 105f) and other network entities.
  • a BS 105 may be a station that communicates with UEs 115 and may also be referred to as an evolved node B (eNB) , a next generation eNB (gNB) , an access point, and the like.
  • eNB evolved node B
  • gNB next generation eNB
  • Each BS 105 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to this particular geographic coverage area of a BS 105 and/or a BS subsystem serving the coverage area, depending on the context in which the term is used.
  • a BS 105 may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, and/or other types of cell.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a pico cell, would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a femto cell, would also generally cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a small cell may be referred to as a small cell BS, a pico BS, a femto BS or a home BS. In the example shown in FIG.
  • the BSs 105d and 105e may be regular macro BSs, while the BSs 105a-105c may be macro BSs enabled with one of three dimension (3D) , full dimension (FD) , or massive MIMO.
  • the BSs 105a-105c may take advantage of their higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity.
  • the BS 105f may be a small cell BS which may be a home node or portable access point.
  • a BS 105 may support one or multiple (e.g., two, three, four, and the like) cells.
  • the network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the UEs 115 are dispersed throughout the wireless network 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also be referred to as a terminal, a mobile station, a subscriber unit, a station, or the like.
  • a UE 115 may be a cellular phone, a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, or the like.
  • PDA personal digital assistant
  • WLL wireless local loop
  • a UE 115 may be a device that includes a Universal Integrated Circuit Card (UICC) .
  • a UE may be a device that does not include a UICC.
  • UICC Universal Integrated Circuit Card
  • the UEs 115 that do not include UICCs may also be referred to as IoT devices or internet of everything (IoE) devices.
  • the UEs 115a-115d are examples of mobile smart phone-type devices accessing network 100.
  • a UE 115 may also be a machine specifically configured for connected communication, including machine type communication (MTC) , enhanced MTC (eMTC) , narrowband IoT (NB-IoT) and the like.
  • MTC machine type communication
  • eMTC enhanced MTC
  • NB-IoT narrowband IoT
  • the UEs 115e-115h are examples of various machines configured for communication that access the network 100.
  • the UEs 115i-115k are examples of vehicles equipped with wireless communication devices configured for communication that access the network 100.
  • a UE 115 may be able to communicate with any type of the BSs, whether macro BS, small cell, or the like.
  • a lightning bolt e.g., communication links indicates wireless transmissions between a UE 115 and a serving BS 105, which is a BS designated to serve the UE 115 on the downlink (DL) and/or uplink (UL) , desired transmission between BSs 105, backhaul transmissions between BSs, or sidelink transmissions between UEs 115.
  • the BSs 105a-105c may serve the UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity.
  • the macro BS 105d may perform backhaul communications with the BSs 105a-105c, as well as small cell, the BS 105f.
  • the macro BS 105d may also transmits multicast services which are subscribed to and received by the UEs 115c and 115d.
  • Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
  • the BSs 105 may also communicate with a core network.
  • the core network may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • IP Internet Protocol
  • At least some of the BSs 105 (e.g., which may be an example of a gNB or an access node controller (ANC) ) may interface with the core network through backhaul links (e.g., NG-C, NG-U, etc. ) and may perform radio configuration and scheduling for communication with the UEs 115.
  • the BSs 105 may communicate, either directly or indirectly (e.g., through core network) , with each other over backhaul links (e.g., X1, X2, etc. ) , which may be wired or wireless communication links.
  • the network 100 may also support mission critical communications with ultra-reliable and redundant links for mission critical devices, such as the UE 115e, which may be a drone. Redundant communication links with the UE 115e may include links from the macro BSs 105d and 105e, as well as links from the small cell BS 105f.
  • UE 115f e.g., a thermometer
  • UE 115g e.g., smart meter
  • UE 115h e.g., wearable device
  • the network 100 may also provide additional network efficiency through dynamic, low-latency TDD/FDD communications, such asV2V, V2X, C-V2X communications between a UE 115i, 115j, or 115k and other UEs 115, and/or vehicle-to-infrastructure (V2I) communications between a UE 115i, 115j, or 115k and a BS 105.
  • V2V dynamic, low-latency TDD/FDD communications
  • V2X V2X
  • C-V2X C-V2X communications between a UE 115i, 115j, or 115k and other UEs 115
  • V2I vehicle-to-infrastructure
  • the network 100 utilizes OFDM-based waveforms for communications.
  • An OFDM-based system may partition the system BW into multiple (K) orthogonal subcarriers, which are also commonly referred to as subcarriers, tones, bins, or the like. Each subcarrier may be modulated with data.
  • the subcarrier spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system BW.
  • the system BW may also be partitioned into subbands. In other instances, the subcarrier spacing and/or the duration of TTIs may be scalable.
  • the BSs 105 can assign or schedule transmission resources (e.g., in the form of time-frequency RB) for downlink (DL) and uplink (UL) transmissions in the network 100.
  • DL refers to the transmission direction from a BS 105 to a UE 115
  • UL refers to the transmission direction from a UE 115 to a BS 105.
  • the communication can be in the form of radio frames.
  • a radio frame may be divided into a plurality of subframes or slots, for example, about 10. Each slot may be further divided into mini-slots. In a FDD mode, simultaneous UL and DL transmissions may occur in different frequency bands.
  • each subframe includes a UL subframe in a UL frequency band and a DL subframe in a DL frequency band.
  • UL and DL transmissions occur at different time periods using the same frequency band.
  • a subset of the subframes (e.g., DL subframes) in a radio frame may be used for DL transmissions and another subset of the subframes (e.g., UL subframes) in the radio frame may be used for UL transmissions.
  • each DL or UL subframe may have pre-defined regions for transmissions of reference signals, control information, and data.
  • Reference signals are predetermined signals that facilitate the communications between the BSs 105 and the UEs 115.
  • a reference signal can have a particular pilot pattern or structure, where pilot tones may span across an operational BW or frequency band, each positioned at a pre-defined time and a pre-defined frequency.
  • a BS 105 may transmit cell specific reference signals (CRSs) and/or channel state information –reference signals (CSI-RSs) to enable a UE 115 to estimate a DL channel.
  • CRSs cell specific reference signals
  • CSI-RSs channel state information –reference signals
  • a UE 115 may transmit sounding reference signals (SRSs) to enable a BS 105 to estimate a UL channel.
  • Control information may include resource assignments and protocol controls.
  • Data may include protocol data and/or operational data.
  • the BSs 105 and the UEs 115 may communicate using self-contained subframes.
  • a self-contained subframe may include a portion for DL communication and a portion for UL communication.
  • a self-contained subframe can be DL-centric or UL-centric.
  • a DL-centric subframe may include a longer duration for DL communication than for UL communication.
  • a UL-centric subframe may include a longer duration for UL communication than for DL communication.
  • the network 100 may be an NR network deployed over a licensed spectrum.
  • the BSs 105 can transmit synchronization signals (e.g., including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) ) in the network 100 to facilitate synchronization.
  • the BSs 105 can broadcast system information associated with the network 100 (e.g., including a master information block (MIB) , remaining system information (RMSI) , and other system information (OSI) ) to facilitate initial network access.
  • MIB master information block
  • RMSI remaining system information
  • OSI system information
  • the BSs 105 may broadcast the PSS, the SSS, and/or the MIB in the form of synchronization signal block (SSBs) over a physical broadcast channel (PBCH) and may broadcast the RMSI and/or the OSI over a physical downlink shared channel (PDSCH) .
  • PBCH physical broadcast channel
  • PDSCH physical downlink shared channel
  • a UE 115 attempting to access the network 100 may perform an initial cell search by detecting a PSS from a BS 105.
  • the PSS may enable synchronization of period timing and may indicate a physical layer identity value.
  • the UE 115 may then receive a SSS.
  • the SSS may enable radio frame synchronization, and may provide a cell identity value, which may be combined with the physical layer identity value to identify the cell.
  • the PSS and the SSS may be located in a central portion of a carrier or any suitable frequencies within the carrier.
  • the UE 115 may receive a MIB.
  • the MIB may include system information for initial network access and scheduling information for RMSI and/or OSI.
  • the UE 115 may receive RMSI and/or OSI.
  • the RMSI and/or OSI may include radio resource control (RRC) information related to random access channel (RACH) procedures, paging, control resource set (CORESET) for physical downlink control channel (PDCCH) monitoring, physical UL control channel (PUCCH) , physical UL shared channel (PUSCH) , power control, and SRS.
  • RRC radio resource control
  • the UE 115 can perform a random access procedure to establish a connection with the BS 105.
  • the random access procedure may be a four-step random access procedure.
  • the UE 115 may transmit a random access preamble and the BS 105 may respond with a random access response.
  • the random access response (RAR) may include a detected random access preamble identifier (ID) corresponding to the random access preamble, timing advance (TA) information, a UL grant, a temporary cell-radio network temporary identifier (C-RNTI) , and/or a backoff indicator.
  • ID detected random access preamble identifier
  • TA timing advance
  • C-RNTI temporary cell-radio network temporary identifier
  • the UE 115 may transmit a connection request to the BS 105 and the BS 105 may respond with a connection response.
  • the connection response may indicate a contention resolution.
  • the random access preamble, the RAR, the connection request, and the connection response can be referred to as message 1 (MSG1) , message 2 (MSG2) , message 3 (MSG3) , and message 4 (MSG4) , respectively.
  • the random access procedure may be a two-step random access procedure, where the UE 115 may transmit a random access preamble and a connection request in a single transmission and the BS 105 may respond by transmitting a random access response and a connection response in a single transmission.
  • the UE 115 and the BS 105 can enter a normal operation stage, where operational data may be exchanged.
  • the BS 105 may schedule the UE 115 for UL and/or DL communications.
  • the BS 105 may transmit UL and/or DL scheduling grants to the UE 115 via a PDCCH.
  • the scheduling grants may be transmitted in the form of DL control information (DCI) .
  • the BS 105 may transmit a DL communication signal (e.g., carrying data) to the UE 115 via a PDSCH according to a DL scheduling grant.
  • the UE 115 may transmit a UL communication signal to the BS 105 via a PUSCH and/or PUCCH according to a UL scheduling grant.
  • the BS 105 may communicate with a UE 115 using HARQ techniques to improve communication reliability, for example, to provide a URLLC service.
  • the BS 105 may schedule a UE 115 for a PDSCH communication by transmitting a DL grant in a PDCCH.
  • the BS 105 may transmit a DL data packet to the UE 115 according to the schedule in the PDSCH.
  • the DL data packet may be transmitted in the form of a transport block (TB) . If the UE 115 receives the DL data packet successfully, the UE 115 may transmit a HARQ ACK to the BS 105.
  • TB transport block
  • the UE 115 may transmit a HARQ NACK to the BS 105.
  • the BS 105 may retransmit the DL data packet to the UE 115.
  • the retransmission may include the same coded version of DL data as the initial transmission.
  • the retransmission may include a different coded version of the DL data than the initial transmission.
  • the UE 115 may apply soft-combining to combine the encoded data received from the initial transmission and the retransmission for decoding.
  • the BS 105 and the UE 115 may also apply HARQ for UL communications using substantially similar mechanisms as the DL HARQ.
  • the network 100 may operate over a shared channel, which may include shared frequency bands or unlicensed frequency bands.
  • the network 100 may be an NR-unlicensed (NR-U) network operating over an unlicensed frequency band.
  • NR-U NR-unlicensed
  • the BSs 105 and the UEs 115 may be operated by multiple network operating entities.
  • the BSs 105 and the UEs 115 may employ an LBT procedure to monitor for transmission opportunities (TXOPs) in the shared channel.
  • TXOPs transmission opportunities
  • a wireless communication device may perform an LBT in the shared channel.
  • LBT is a channel access scheme that may be used in the unlicensed spectrum.
  • the wireless communication device may access the shared medium to transmit and/or receive data.
  • a transmitting node e.g., a BS 105 or a UE 115
  • the transmitting node may proceed with the transmission.
  • the transmitting node may refrain from transmitting in the channel.
  • the LBT may be based on energy detection. For example, the LBT results in a pass when signal energy measured from the channel is below a threshold. Conversely, the LBT results in a failure when signal energy measured from the channel exceeds the threshold.
  • the LBT may be based on signal detection. For example, the LBT results in a pass when a channel reservation signal (e.g., a predetermined preamble signal) is not detected in the channel. Conversely, the LBT results in a failure when a channel reservation signal is detected in the channel.
  • a TXOP may also be referred to as channel occupancy time (COT) .
  • a wireless communication device may perform an LBT (e.g., based on energy detection and/or signal detection) in the shared channel.
  • LBT is a channel access scheme that may be used in the unlicensed spectrum.
  • the wireless communication device may access the shared medium to transmit and/or receive data.
  • the BS 105 may perform an LBT in a frequency band prior to transmitting in the frequency band and may transmit in one or more channels based on the LBT result. If the channel is available (performance of the LBT results in an LBT pass) , the BS 105 may perform a DL transmission, receive an UL transmission from the UE 115, and/or schedule the UE 115 for data transmission and/or reception within a COT.
  • the BS 105 does not gain immediate access to the shared medium for data scheduling or transmission.
  • the BS 105 may back off and perform the LBT procedure again at a later point in time.
  • the UE 115 may perform an LBT in the frequency band prior to transmitting in the frequency band and may transmit in one or more channels based on the LBT result. If the channel is available (performance of the LBT results in an LBT pass) , the UE 115 may perform an UL transmission or receive a DL transmission from the BS 105. If the channel is not available (performance of the LBT results in an LBT fail) , the UE 115 may back off and perform the LBT procedure again at a later point in time.
  • the network 100 may operate over a licensed frequency band, a shared frequency band, and/or an unlicensed frequency band, for example, at about 3.5 gigahertz (GHz) , sub-6 GHz or higher frequencies in the mmW band.
  • the network 100 may partition a frequency band into multiple channels, each occupying about 20 megahertz (MHz) .
  • the network 100 may operate over a system BW or a component carrier (CC) BW.
  • the network 100 may partition the system BW into multiple BWPs (e.g., portions) .
  • a BS 105 may dynamically assign a UE 115 to operate over a certain BWP (e.g., a certain portion of the system BW) .
  • the assigned BWP may be referred to as the active BWP.
  • the UE 115 may monitor the active BWP for signaling information from the BS 105.
  • the BS 105 may schedule the UE 115 for UL or DL communications in the active BWP.
  • a BS 105 may assign a pair of BWPs within the CC to a UE 115 for UL and DL communications.
  • the BWP pair may include one BWP for UL communications and one BWP for DL communications.
  • FIG. 2 is a timing diagram illustrating a transmission frame structure 200 according to one or more aspects of the present disclosure.
  • the transmission frame structure 200 may be employed by BSs such as the BSs 105 and UEs such as the UEs 115 in a network such as the network 100 for communications.
  • the BS may communicate with the UE using time-frequency resources configured as shown in the transmission frame structure 200.
  • the x-axes represent time in some arbitrary units and the y-axes represent frequency in some arbitrary units.
  • the transmission frame structure 200 includes a radio frame 201.
  • the duration of the radio frame 201 may vary depending on the aspects. In an example, the radio frame 201 may have a duration of about ten milliseconds.
  • the radio frame 201 includes M number of slots 202, where M may be any suitable positive integer. In an example, M may be about 10.
  • Each slot 202 includes a number of subcarriers 204 in frequency and a number of symbols 206 in time.
  • the number of subcarriers 204 and/or the number of symbols 206 in a slot 202 may vary depending on the aspects, for example, based on the channel bandwidth, the subcarrier spacing (SCS) , and/or the CP mode.
  • One subcarrier 204 in frequency and one symbol 206 in time forms one resource element (RE) 212 for transmission.
  • the REs are grouped into physical resource blocks (PRBs) .
  • Each PRB may include twelve subcarriers, and a BW part may include a group of continuous PRBs.
  • Aresource block (RB) 210 is formed from a number of consecutive subcarriers 204 in frequency and a number of consecutive symbols 206 in time.
  • a resource block group (RBG) or RB set may include one or more RBs and may also be referred to as a subband.
  • the BS 105 may schedule the UE 115 at a frequency-granularity of an RB 210 (e.g., including about 12 subcarriers 204) .
  • a BS may schedule a UE (e.g., UE 115 in FIG. 1) for UL and/or DL communications at a time-granularity of slots 202 or mini-slots 208.
  • Each slot 202 may be time-partitioned into K number of mini-slots 208.
  • Each mini-slot 208 may include one or more symbols 206.
  • the mini-slots 208 in a slot 202 may have variable lengths. For example, when a slot 202 includes N number of symbols 206, a mini-slot 208 may have a length between one symbol 206 and (N-1) symbols 206. In some aspects, a mini-slot 208 may have a length of about two symbols 206, about four symbols 206, or about seven symbols 206.
  • the BS 105 may perform an LBT prior to transmitting in an LBT bandwidth.
  • one or more RB sets may be semi-statically unavailable.
  • the network 100 may co-exist with a Wi-Fi network within a set of LBT bandwidths.
  • the BS 105 may determine that the probability of an LBT resulting in an LBT pass within the set of LBT bandwidths is low and accordingly may determine to not contend for a COT within the set of LBT bandwidths. Accordingly, the BS 105 may determine that the RB set (s) within the set of LBT bandwidths is/are semi-statically unavailable.
  • a certain frequency band such as a 6 GHz band, may include a certain subband (within an LBT bandwidth of the set of LBT bandwidths) with transmissions having a low Equivalent Isotropically Radiated Power (EIRP) , which may refer to the product of transmitter power and the antenna gain in a given direction relative to an isotropic antenna of a radio transmitter.
  • EIRP Equivalent Isotropically Radiated Power
  • the low EIRP may be a transmit power that is limited in a low range by regulation (e.g., Federal Communications Commission (FCC) ) .
  • FCC Federal Communications Commission
  • the BS 105 may determine to use subbands or LBT bandwidths that are on both sides (the high frequency and the low frequency sides) of the certain subband or LBT bandwidth and determine not to transmit in an RB set within certain LBT bandwidth to protect the LBT bandwidth from interference. Accordingly, the BS 105 may determine that an RB set within the guard bands is unavailable.
  • the present disclosure provides techniques for single carrier component (CC) -based schemes to handle semi-statically unavailable RB sets in the network (e.g., network 100) .
  • the BS 105 may transmit to the UE 115, a configuration indicating one or more RBs of a plurality of RB sets in a shared radio frequency band being unavailable for communication.
  • the UE 115 may receive the configuration and determine, based on the configuration, which RB set (s) of the plurality of RB sets is/are unavailable.
  • FIG. 3 illustrates a configuration scheme 300 indicating a semi-static availability and/or unavailability of one or more RB sets of a plurality of RB sets within a frequency band 302 according to one or more aspects of the present disclosure.
  • the x-axis represents time in some constant units, and the y-axis represents frequency in some constant units.
  • the configuration scheme 300 may be employed by a BS 105 and a UE 115 in a network such as the network 100 for communications. For instance, the BS 105 may transmit a configuration in accordance with the configuration scheme 300 to the UE 115, and the UE 115 may receive the configuration.
  • the BS 105 and the UE 115 may operate in the frequency band 302 (e.g., BWP) .
  • the BS 105 may partition the frequency band 302 into a plurality of LBT bandwidths 308, 310, 312, and 313.
  • An LBT bandwidth may be referred to as a subband in the present disclosure.
  • the frequency band 302 and the LBT bandwidths 308, 310, 312, and 313 may have any suitable BWs.
  • the frequency band 302 may have a BW of about 80 MHz
  • the BS 105 may partition the frequency band 302 into the four LBT bandwidths 308, 310, 312, and 313, where each LBT bandwidth may have a BW of about 20 MHz.
  • the plurality of RB sets within the frequency band 302 may be used for DL and/or UL communications by a BS 105 and a UE 115 in a network such as the network 100.
  • the BS 105 may transmit DL communication signals to a UE 115 or receive UL communication signals from the UE 115 using one or more RB sets within the frequency band.
  • An RB set may be derived from intra-cell guard band signaling.
  • an RB set 320 may be within the LBT bandwidth 308 and span a time T0 to time T1
  • an RB set 322 may be within the LBT bandwidth 310 and span a time T0 to time T1
  • an RB set 324 may be within the LBT bandwidth 312 and span a time T0 to time T1
  • an RB set 326 may be within the LBT bandwidth 313 and span a time T0 to time T1.
  • Guard bands of UL and DL communications may have different bandwidths.
  • an UL configuration for an RB set may be different from a DL configuration for an RB set to enforce guard band protection.
  • a guard band may be zero size when the BS 105 or the UE 115 is performing all or nothing transmissions.
  • the configuration scheme 300 may be an RRC configuration that is transmitted by the BS 105 to the UE 115.
  • the BS 105 may transmit the RRC configuration including an availability bitmap 340 including “1011” , the bitmap 340 indicating whether each RB set of the plurality of RB sets 320, 322, 324, and 326 is unavailable and/or available (for communications in the BWP) .
  • the DL or UL LBT bandwidths may cover the “blocked” RB sets. Accordingly, a single CC may cover discontinuous available spectrum.
  • the availability bitmap 340 may include a plurality of entries, each entry storing a bit that corresponds to an RB set of the plurality of RB sets 320, 322, 324, and 326.
  • the availability bitmap 340 includes at least a first entry 342 corresponding to the RB set 326 and storing a bit value of 1, a second entry 344 corresponding to the RB set 324 and storing a bit value of 0, a third entry 346 corresponding to the RB set 322 and storing a bit value of 1, and a fourth entry 348 corresponding to the RB set 320 and storing a bit value of 1.
  • Each bit in the availability bitmap 340 having a first value may indicate that an RB set corresponding to the respective bit is available, and each bit in the availability bitmap 340 having a second value different from the first value may indicate that an RB set corresponding to the respective bit is unavailable.
  • the first value may be 1, and the second value may be 0.
  • the availability bitmap 340 may indicate that the RB set 326 corresponding to the first entry 342, the RB set 322 corresponding to the third entry 346, and the RB set 320 corresponding to the fourth entry 348 are available, and that the RB set 324 corresponding to the second entry 344 is unavailable (indicated by the dashed lines around the RB set 324) .
  • the BS 105 may determine not to perform an LBT in an LBT bandwidth including an RB set that has been indicated as being unavailable. If an RB set is defined as unavailable, the BS 105 may determine not to use the unavailable RB set for transmitting DL communications to and receiving UL communications from the UE 115. In some instances, because the unavailable RB set is not used, the guard band (s) adjacent to the semi-statically unavailable RB set is/are not used as well.
  • the first value may be 0 and indicate that an RB set corresponding to the respective bit is available
  • the second value may be 1 and indicate that an RB set corresponding to the respective bit is unavailable.
  • the UE 115 may receive the availability bitmap 340 and determine, based on the availability bitmap 340, which RB set (s) is/are unavailable. In keeping with the above instances in which a bit value of 1 indicates that an RB set corresponding to the respective bit is available and a bit value of 0 indicates that an RB set corresponding to the respective bit is unavailable, the UE 115 may determine that the RB set 326 corresponding to the first entry 342, the RB set 322 corresponding to the third entry 346, and the RB set 320 corresponding to the fourth entry 348 are available, and that the RB set 324 corresponding to the second entry 344 is unavailable. The UE 115 may determine not to monitor for scheduling information from the BS 205 and/or perform an LBT in an LBT bandwidth including an RB set that has been indicated as being unavailable (via the availability bitmap 340) .
  • the BS 105 may transmit to the UE 115, the LBT status based on a result of the one or more LBTs performed in the set of LBT bandwidths.
  • the BS 105 may perform an LBT in a set of LBT bandwidths corresponding to the RB sets indicated as available by the configuration scheme 300.
  • the BS 105 transmits PDCCH carrying DCI in each LBT bandwidth in which the BS 105 has acquired a COT. In other words, if the BS 105 operates in “N” LBT bandwidths, the BS 105 may have up to “N” DCI candidates for transmissions, where “N” is a number greater than one.
  • the BS 105 may pass LBT in “M” of the “N” LBT bandwidths, where “M” is a number that does not exceed “N” . Accordingly, the BS 105 may transmit “M” DCI, one DCI in each of the “M” LBT bandwidths. In an example, “M” is a number that is greater than two (e.g., three, four, or more) .
  • FIG. 4 illustrates an LBT status communication scheme 400 indicating an LBT status corresponding to one or more RB sets of a plurality of RB sets within a frequency band according to one or more aspects of the present disclosure.
  • the x-axis represents time in some constant units, and the y-axis represents frequency in some constant units.
  • the LBT status communication scheme 400 may be employed by a BS 105 and a UE 115 in a network such as the network 100 for communications. For instance, the BS 105 may transmit the LBT status to the UE 115, and the UE 115 may receive the LBT status. Additionally, the pattern-filled boxes of FIG.
  • a transmission 4 may represent transmission of PDCCH and/or PDSCH and/or reception of PUCCH and/or PUSCH in a transmission period. While an entire transmission period is pattern-filled, in some aspects, a transmission may occur only in a corresponding portion of the transmission period (e.g., in a slot or mini-slot of the transmission period) .
  • the frequency band 302, the plurality of LBT bandwidths 308, 310, 312, and 313, the guard bands 314, 316, and 318, and the RB sets 320, 322, 324, and 326 were discussed in relation to FIG. 3.
  • the BS 105 may perform an LBT in a first set of LBT bandwidths corresponding to a first subset of the plurality of RB sets 320, 322, and 326, where the first subset excludes each RB set that has been indicated as unavailable for communication by the configuration (e.g., via the availability bitmap 340 in FIG. 3) .
  • the BS 105 may perform an LBT 410 in the LBT bandwidth 308 including the RB set 320 to acquire a COT 416, may perform an LBT 412 in the LBT bandwidth 310 including the RB set 322 to acquire a COT 418, and may perform an LBT 414 in the LBT bandwidth 313 including the RB set 326 to acquire a COT 420.
  • the BS may perform the LBTs 410, 412, and 414 simultaneously in the LBT bandwidths 308, 310, and 313, respectively.
  • an LBT may refer to a channel sensing mechanism used by devices (e.g., BS 105 or UE 115) to determine the presence of other signals in the channel prior to transmission and to avoid collisions with other transmissions.
  • devices e.g., BS 105 or UE 115
  • a device may sense the medium for a period of time.
  • the BS 105 may determine not to perform an LBT in the LBT bandwidth 312 corresponding to the RB set 324 because the RB set 324 has been determined to be semi-statically unavailable for communication. As discussed, if an LBT results in an LBT pass, the BS 105 may transmit during the acquired COT. Based on a successful LBT (e.g., an LBT resulting in an LBT pass) , the BS 105 reserves the COT and communicates DL and/or UL signals during the COT in the applicable RB set. Based on an unsuccessful LBT (e.g., an LBT resulting in an LBT fail) , the BS 105 does not reserve the COT and refrains from or does not transmit to the UE 115.
  • a successful LBT e.g., an LBT resulting in an LBT pass
  • the BS 105 reserves the COT and communicates DL and/or UL signals during the COT in the applicable RB set.
  • an unsuccessful LBT e.g., an
  • the LBT 414 results in an LBT pass.
  • the BS 105 may reserve the COT 420 and communicate DL and/or UL signals during the RB set 326.
  • the BS 105 may share the COT 420 with the UE 115 by transmitting in the LBT bandwidth 313 to the UE 115, PDCCH carrying DCI (not shown) at the beginning of the COT 420 in, for example, a common search space or a common group PDCCH.
  • the DCI may contain a COT-SI 422 indicating information about the COT 420.
  • the COT-SI 422 may indicate a remaining duration of the COT 422 and/or an LBT status of one or more of the plurality of RB sets 320, 322, 324, and 326.
  • the BS 105 has determined that the RB set 324 is unavailable for communication. Accordingly, the BS 105 does not perform an LBT in the LBT bandwidth 312.
  • the BS 105 may perform similar actions as discussed relative to performing the LBT 414 for the LBT 412 and the LBT 410. As shown by the pattern-filled box of the RB set 322, the LBT 412 results in an LBT pass. Accordingly, the BS 105 may reserve the COT 418 and communicate DL and/or UL signals during the RB set 322.
  • the BS 105 may share the COT 418 with the UE 115 by transmitting in the LBT bandwidth 310 to the UE 115, PDCCH carrying DCI (not shown) at the beginning of the COT 418 in, for example, a common search space or a common group PDCCH.
  • the DCI may contain a COT-SI 424 indicating information about the COT 418.
  • the COT-SI 424 may indicate a remaining duration of the COT 418 and/or an LBT status of one or more of the plurality of RB sets 320, 322, 324, and 326.
  • the LBT 410 results in an LBT fail. Accordingly, the BS 105 does not acquire the COT 416 and refrains from transmitting during the RB set 320.
  • the BS 105 may provide dynamic signaling (e.g., via DCI) to indicate an LBT status in the shared frequency band.
  • Each DCI may contain a COT-SI (e.g., COT-SI 422 or COT-SI 424) including the LBT bitmap 440 indicating the LBT status corresponding to one or more of the plurality of RB sets 320, 322, 324, and 326.
  • An LBT status corresponds to an RB set if the BS 105 performs an LBT in an LBT bandwidth including the RB set.
  • the BS 105 may transmit COT-SI including the LBT bitmap 440 that indicates the LBT status in a variety of ways. For instance, in FIG.
  • the LBT bitmap includes a bit for each RB set that was indicated as being available for communication in the availability bitmap 340 (see FIG. 3) and does not include a bit for any RB sets indicated as being unavailable for communication in the availability bitmap 340.
  • the LBT bitmap includes a bit for each RB set in the availability bitmap 340 (see FIG. 3) , each bit indicating an LBT status corresponding to the respective RB set.
  • FIG. 5 illustrates an LBT status communication scheme 500 according to one or more aspects of the present disclosure.
  • the frequency band 302, the plurality of LBT bandwidths 308, 310, 312, and 313, the guard bands 314, 316, and 318, and the RB sets 320, 322, 324, and 326 were discussed in relation to FIG. 3.
  • the LBTs 410, 412, and 414, the COTs 416, 418, and 420, and the COT-SIs 422 and 424 were discussed in relation to FIG. 4.
  • the BS 105 may transmit to the UE 115, the COT-SI 422, 424 including an LBT bitmap 540 indicating an LBT status in the shared radio frequency band 302.
  • the LBT bitmap 540 may correspond to the LBT bitmap 440 in FIG. 4.
  • each of the COT-SI 422 and the COT-SI 424 may include the LBT bitmap 540 indicating the LBT status corresponding to the RB sets indicated as semi-statically available by the configuration (e.g., by the configuration scheme 300) .
  • a first subset of RB sets indicated as semi-statically available by the configuration includes a first number of RB sets including RB sets 320, 322, and 326
  • the LBT bitmap 540 includes a second number of bits corresponding to the semi-statically available RB sets 320, 322, and 326, where the first number is the same as the second number.
  • the first number is three and corresponds to the three semi-statically available RB sets 320, 322, and 326
  • the second number is three and corresponds to the three bits stored in a first entry 504, a second entry 506, and a third entry 508 in the LBT bitmap 540.
  • the LBT bitmap 540 stores “110” .
  • the LBT bitmap 540 includes a first entry 504 corresponding to the RB set 326 and storing a bit value of 1 indicating that the LBT 414 resulted in an LBT pass, a second entry 506 corresponding to the RB set 322 and storing a bit value of 1 indicating that the LBT 412 resulted in an LBT pass, and a third entry 508 corresponding to the RB set 320 and storing a bit value of 0 indicating that the LBT 410 resulted in an LBT fail.
  • each bit in the LBT bitmap 540 corresponding to an RB set of the first subset of RBs indicates an LBT result for the corresponding RB set, where the first subset of RB sets is semi-statically available. Additionally or alternatively, a bit value of 1 in the LBT bitmap 540 may indicate that the corresponding RB set is available, and a bit value of 0 in the LBT bitmap 540 may indicate that the corresponding RB set is unavailable.
  • the BS 105 may skip the one or more semi-statically unavailable RB sets (e.g., RB set 324) and determine not to include a bit indicating an LBT status corresponding to the semi-statically unavailable RB sets. Accordingly, the BS 105 may exclude bits corresponding to RB sets that are semi-statically unavailable for communication from being included in the LBT bitmap 540. In other words, the LBT bitmap 540 is devoid of a bit indicating an LBT status corresponding to any semi-statically unavailable RB sets.
  • the BS 105 may communicate with the UE 115 in one or more RB sets of the plurality of RB sets excluding the one or more semi-statically unavailable RB sets, one or more communication signals based on the configuration (e.g., configuration scheme 300) and the COT-SI 422, 424. For instance, the BS 105 may transmit a DL communication signal in the RB set 326 or the RB set 322 to the UE 115. The BS 105 may refrain from transmitting a DL communication signal in the RB set 324 or the RB set 320, which have each been indicated as being unavailable by the availability bitmap 340 and/or the LBT bitmap 540. The BS 105 may share a COT with the UE 115.
  • the configuration e.g., configuration scheme 300
  • the BS 105 may transmit a DL communication signal in the RB set 326 or the RB set 322 to the UE 115.
  • the BS 105 may refrain from transmitting a DL communication signal
  • the UE 115 may detect the DCI containing the COT-SI 422, 424 including the LBT bitmap 540 and decode the DCI.
  • the UE 115 may communicate with the BS 105 in one or more RB sets, one or more communication signals based on the configuration (e.g., configuration scheme 300) and the COT-SI 422, 424.
  • the UE 115 may monitor for DL communications (e.g., PDCCH DCI) from the BS 105 in each of the RB sets 322 and 326 indicated as available by the LBT bitmap 540.
  • the BS 105 may transmit a DL communication in the RB set 322 and/or the RB set 326 to the UE 115, which may receive a DL grant and a DL communication based on the DL grant from the BS 105.
  • the UE 115 may determine, based on the availability bitmap 340, that the RB set 324 is semi-statically unavailable. For instance, the UE 115 may store the availability bitmap 340 at a memory (e.g., memory 1004 in FIG. 10) of the UE 115. Accordingly, the UE 115 may determine not to perform an LBT and/or not to communicate a communication signal in the LBT bandwidth 312 including the RB set 324. The UE 115 may determine, based on the LBT bitmap 540, a set of one or more available RB sets corresponding to one or more LBT bandwidths in which to perform an LBT. In the example illustrated in FIG.
  • the UE 115 may perform an LBT in a first set of LBT bandwidths including RB sets that have been indicated as available by the LBT bitmap 540. For instance, the UE 115 may determine that the RB set 326 corresponding to the bit value of 1 in the first entry 504 is available and may accordingly perform an LBT in the LBT bandwidth 313 including the RB set 326. In another instance, the UE 115 may determine that the RB set 322 corresponding to the bit value of 1 in the second entry 506 is available and may accordingly perform an LBT in the LBT bandwidth 310 including the RB set 322.
  • the UE 115 may transmit an UL communication to the BS 105 during the COT in the respective LBT bandwidth. For example, the UE 115 may transmit an UL communication to the BS 105 based on an LBT pass, and the BS 105 may receive the UL communication from the UE 115.
  • the UE 115 may determine that the RB set 320 has been indicated as unavailable by the LBT bitmap 540 (e.g., due to an LBT fail) and accordingly does not communicate a communication signal (e.g., receive a DL communication signal or transmit an UL communication signal) or perform an LBT in the LBT bandwidth 308 including the unavailable RB set 320.
  • a communication signal e.g., receive a DL communication signal or transmit an UL communication signal
  • FIG. 6 illustrates an LBT status communication scheme 600 according to one or more aspects of the present disclosure.
  • the frequency band 302, the plurality of LBT bandwidths 308, 310, 312, and 313, the guard bands 314, 316, and 318, and the RB sets 320, 322, 324, and 326 were discussed in relation to FIG. 3.
  • the LBTs 410, 412, and 414, the COTs 416, 418, and 420, and the COT-SIs 422 and 424 were discussed in relation to FIG. 4.
  • the BS 105 may transmit to the UE 115, the COT-SI 422, 424 including an LBT bitmap 640 indicating an LBT status in the shared radio frequency band 302.
  • the LBT bitmap 640 may correspond to the LBT bitmap 440 in FIG. 4.
  • each of the COT-SI 422 and the COT-SI 424 may include the LBT bitmap 640 indicating the LBT status corresponding to the RB sets indicated (e.g., available or unavailable RB sets) by the configuration (e.g., by the configuration scheme 300) .
  • Afirst subset of RB sets indicated as semi-statically available by the configuration includes a first number of RB sets including RB sets 320, 322, and 326
  • the LBT bitmap 640 includes a second number of bits corresponding to the semi-statically available RB sets 320, 322, and 326, where the first number is the same as the second number.
  • the first number is three and corresponds to the three semi-statically available RB sets 320, 322, and 326
  • the second number is three and corresponds to the three bits stored in a first entry 604, a third entry 608, and a fourth entry 610 in the LBT bitmap 640.
  • a second subset of RB sets indicated as semi-statically unavailable by the configuration includes a third number of RB sets including RB set 324
  • the LBT bitmap 640 includes a fourth number of bits corresponding to the semi-statically unavailable RB set 324, where the third number is the same as the fourth number.
  • the third number is one and corresponds to the one semi-statically unavailable RB set 324
  • the fourth number is one and corresponds to the one bit stored in a second entry 606 in the LBT bitmap 640.
  • Each bit in the LBT bitmap 640 indicates that an RB set corresponding to the second subset of semi-statically unavailable RB sets is unavailable.
  • the first subset of RB sets may be mutually exclusive of the second subset of RB sets.
  • the LBT bitmap 640 stores “1010” .
  • the LBT bitmap 640 includes a first entry 604 corresponding to the RB set 326 and storing a bit value of 1 indicating that the LBT 414 resulted in an LBT pass, a second entry 606 corresponding to the RB set 324 and storing a bit value of 0 indicating that the RB set 324 is unavailable (e.g., due to being semi-statically unavailable as indicated by the configuration scheme 300) , a third entry 608 corresponding to the RB set 322 and storing a bit value of 1 indicating that the LBT 412 resulted in an LBT pass, and a fourth entry 610 corresponding to the RB set 320 and storing a bit value of 0 indicating that the RB set 320 is unavailable (e.g., due to the LBT 410 resulting in an LBT fail) .
  • the LBT bitmap 640 includes a plurality of bits corresponding to RB sets that are available and/or unavailable for communication, each bit corresponding to a single RB set of the plurality of RB sets 320, 322, 324, and 326 and indicating an LBT status for the single RB set. Additionally or alternatively, a bit value of 1 in the LBT bitmap 640 may indicate that the corresponding RB set is available, and a bit value of 0 in the LBT bitmap 640 may indicate that the corresponding RB set is unavailable.
  • the BS 105 may communicate with the UE 115 in one or more RB sets of the plurality of RB sets excluding the one or more semi-statically unavailable RB sets, one or more communication signals based on the configuration (e.g., configuration scheme 300) and the COT-SI 422, 424. For instance, the BS 105 may transmit a DL communication signal in the RB set 326 or the RB set 322 to the UE 115. The BS 105 may refrain from transmitting a DL communication signal in the RB set 324 or the RB set 320, which have each been indicated as being unavailable by the availability bitmap 340 and/or the LBT bitmap 640. The BS 105 may share a COT with the UE 115.
  • the configuration e.g., configuration scheme 300
  • the BS 105 may transmit a DL communication signal in the RB set 326 or the RB set 322 to the UE 115.
  • the BS 105 may refrain from transmitting a DL communication signal
  • the UE 115 may detect the DCI containing the COT-SI 422, 424 including the LBT bitmap 640 and decode the DCI.
  • the UE 115 may communicate with the BS 105 in one or more RB sets, one or more communication signals based on the configuration (e.g., configuration scheme 300) and the COT-SI 422, 424.
  • the UE 115 may perform an AND operation based on the availability bitmap 340 including “1011” in FIG. 3 and the LBT bitmap 640 including “1010” in FIG. 6 to determine an availability of each RB set of the plurality of RB sets 320, 322, 324, and 326.
  • the operation may provide for a result of “1010” , which indicates whether an RB set is available for communication with the BS 105.
  • a bit in the result “1010” having a first value (e.g., bit value of 1) may indicate that an RB set corresponding to the bit is available, and a bit in the result “1010” having a second value (e.g., bit value of 0) different from the first value may indicate that an RB set corresponding to the bit is unavailable.
  • a first most significant bit (MSB) in “1010” has a bit value of 1 and corresponds to the RB set 326.
  • a second MSB in “1010” having a bit value of 0 and corresponding to the RB set 324.
  • a third most significant bit in “1010” having a bit value of 1 and corresponding to the RB set 322.
  • LSB least significant bit
  • the UE 115 may determine, based on the result of “1010” , that the RB set 326 corresponding to the first MSB in the result and the RB set 322 corresponding to the third MSB in the result are available RB sets.
  • the UE 115 may determine, based on the result of “1010” , that the RB set 324 corresponding to the second MSB in the result and the RB set 320 corresponding to the LSB in the result are unavailable RB sets. It should be understood that a bitmap may be arranged in a reverse order such as LSB to MSB or any suitable order as long as there is a 1-to-1 mapping.
  • the UE 115 may monitor for DL communications from the BS 105 in each of the RB sets 322 and 326 indicated as available by the LBT bitmap 640.
  • the BS 105 may transmit a DL communication in the RB set 322 and/or the RB set 326 to the UE 115, which may receive a DL grant and a DL communication based on the DL grant from the BS 105.
  • the UE 115 may determine, based on the result “1010” of the AND operations based on the availability bitmap 340 and the LBT bitmap 640, that the RB set 324 is semi-statically unavailable. Accordingly, the UE 115 may determine not to perform an LBT and/or not to communicate a communication signal in the LBT bandwidth 312 including the RB set 324. The UE 115 may determine, based on the result “1010” of the AND operations based on the availability bitmap 340 and the LBT bitmap 640, a set of one or more available RB sets corresponding to one or more LBT bandwidths in which to perform an LBT.
  • the UE 115 may perform an LBT in a first set of LBT bandwidths including RB sets that have been indicated as available by the result. Additionally, the UE 115 may perform an LBT in an LBT bandwidth including an RB set that is indicated as being available by the result and may determine not to perform LBT and/or not to communicate a communication signal (e.g., receive a DL communication signal or transmit an UL communication signal) in an LBT bandwidth including an RB set that is indicated as being unavailable by the result.
  • a communication signal e.g., receive a DL communication signal or transmit an UL communication signal
  • the BS 105 may be described as transmitting a configuration that is an RRC configuration indicating semi-statically unavailable and/or available RB sets, this is not intended to be limiting and the BS 105 may transmit the configuration indicating semi-statically unavailable and/or available RB sets in a variety of ways.
  • the BS 105 captures the one or more unavailable RB sets in one or more guard bands, as shown in the example illustrated in FIG. 7.
  • FIG. 7 illustrates a configuration scheme 700 indicating an availability and/or unavailability of one or more RB sets of a plurality of RB sets within the frequency band 302 according to one or more aspects of the present disclosure.
  • the x-axis represents time in some constant units, and the y-axis represents frequency in some constant units.
  • the configuration scheme 700 may be employed by a BS 105 and a UE 115 in a network such as the network 100 for communications. For instance, the BS 105 may transmit a configuration in accordance with the configuration scheme 700 to the UE 115, and the UE 115 may receive the configuration.
  • the frequency band 302, the plurality of LBT bandwidths 308, 310, 312, and 313, the guard bands 314, 316, and 318, and the RB sets 320, 322, 324, and 326 were discussed in relation to FIG. 3.
  • the BS 105 may determine that the RB sets 320, 322, and 326 are available for communication and that the RB set 324 is unavailable for communication.
  • the RB set 324 is located between the RB set 322 and the RB set 326, where the RB set 322 and the RB set 324 is spaced apart by the guard band 316, and the RB set 326 and the RB set 324 is spaced apart by the guard band 318.
  • the BS 105 may configure the unavailable RB sets including the RB set 324 as part of an aggregate guard band 702.
  • the aggregate guard band 702 may be, for example, about 20 MHz. In some aspects, the aggregate guard band 702may have an upper bound on the guard band width.
  • the aggregate guard band 702 may span or cover the LBT bandwidth 312 including the unavailable RB set 324 and the guard bands 316 and 318 adjacent to the RB set 324.
  • the plurality of available RB sets includes the three RB sets 320, 322, and 326.
  • the configuration scheme 700 may indicate a plurality of available RB sets spaced apart from each other by a guard band in the shared radio frequency band 302, where the plurality of available RB sets may include the RB sets 320, 322, and 326. As shown in FIG. 7, the RB set 320 and the RB set 322 are spaced apart by the guard band 314, and the RB set 322 and the RB set 326 are spaced apart by the aggregate guard band 702 having a different frequency bandwidth than the guard band 314.
  • the BS 105 may perform an LBT in the plurality of RB sets 320, 322, and 326 indicated by the configuration, the LBT status including an LBT result for each LBT in the plurality of RB sets.
  • FIG. 8 illustrates an LBT status communication scheme 800 indicating an LBT status corresponding to one or more RB sets of a plurality of RB sets within a frequency band according to one or more aspects of the present disclosure.
  • the x-axis represents time in some constant units, and the y-axis represents frequency in some constant units.
  • the LBT status communication scheme 800 may be employed by a BS 105 and a UE 115 in a network such as the network 100 for communications. For instance, the BS 105 may transmit the LBT status to the UE 115, and the UE 115 may receive the LBT status. Additionally, the pattern-filled boxes of FIG.
  • a transmission 8 may represent transmission of PDCCH and/or PDSCH and/or reception of PUCCH and/or PUSCH in a transmission period. While an entire transmission period is pattern-filled, in some aspects, a transmission may occur only in a corresponding portion of the transmission period (e.g., in a slot or mini-slot of the transmission period) .
  • the frequency band 302, the plurality of LBT bandwidths 308, 310, and 313, the guard band 314, and the RB sets 320, 322, and 326 were discussed in relation to FIG. 3. Additionally, the LBTs 410, 412, and 414, the COTs 416, 418, and 420, and the COT-SIs 422 and 424 were discussed in relation to FIG. 4, and the aggregate guard band 702 was discussed in relation to FIG. 7.
  • the BS 105 may perform an LBT in a set of LBT bandwidths including the three available RB sets indicated by the configuration and transmit an LBT status including an LBT result for each LBT in the plurality of RB sets to the UE 115.
  • the BS 105 may perform an LBT in the LBT bandwidth 308 including the RB set 320, in the LBT bandwidth 310 including the RB set 322, and in the LBT bandwidth 313 including the RB set 326 and transmit to the UE 115, the COT-SI 422, 424 including an LBT bitmap 840 indicating the LBT status in the shared radio frequency band 302.
  • the LBT bitmap 840 may correspond to the LBT bitmap 440 in FIG. 4.
  • each of the COT-SI 422 and the COT-SI 424 may include the LBT bitmap 840 indicating the LBT status corresponding to the plurality of RB sets indicated by the configuration (e.g., by the configuration scheme 700) .
  • the plurality of RB sets 320, 322, and 326 includes three available RB sets, and the LBT bitmap 840 includes three bits.
  • Each bit in the LBT bitmap 840 may correspond to an RB set of the plurality of RB set and indicates an LBT result for the corresponding RB set. For instance, a bit in the LBT bitmap 840 may have a bit value of 1 indicating an LBT pass for the corresponding RB set, and a bit in the LBT bitmap 840 may have a bit value of 0 indicating an LBT fail for the corresponding RB set.
  • the dynamically available RB set bitmap (e.g., LBT bitmap 840) may be defined for the RB sets as normal.
  • the LBT bitmap 840 stores “110” .
  • the LBT bitmap 840 includes a first entry 804 corresponding to the RB set 326 and storing a bit value of 1 indicating that the LBT 414 resulted in an LBT pass, a second entry 806 corresponding to the RB set 322 and storing a bit value of 1 indicating that the LBT 412 resulted in an LBT pass, and a third entry 808 corresponding to the RB set 320 and storing a bit value of 0 indicating that the LBT 410 resulted in an LBT fail.
  • each bit in the LBT bitmap 840 corresponding to an RB set of the plurality of RB sets indicated by the configuration indicates an LBT result for the corresponding RB set.
  • the BS 105 may share a COT with the UE 115.
  • the UE 115 may perform similar actions to those discussed above in relation to aspects of, for example, FIGs. 4-6 to detect the DCI containing the COT-SI 422, 424 including the LBT bitmap (e.g., LBT bitmap 840) , decode the DCI, and communicate with the BS 105 in one or more RB sets, one or more communication signals based on the configuration (e.g., configuration scheme 700) and the COT-SI 422, 424.
  • the LBT bitmap e.g., LBT bitmap 840
  • the BS 105 and the UE 115 may operate in any number of LBT bandwidths (e.g., fewer than three or more than four LBT bandwidths) .
  • a configuration scheme may include aspects of the configuration scheme 300 in FIG. 3 and/or the configuration scheme 700 in FIG. 7. Other combinations of these configuration schemes are within the scope of the present disclosure.
  • an LBT status communication scheme may include aspects of the LBT status communication scheme 400 in FIG. 4, the LBT status communication scheme 500 in FIG. 5, the LBT status communication scheme 600 in FIG. 6, and/or the LBT status communication scheme 800 in FIG. 8. Other combinations of these configuration schemes and/or LBT status communication schemes are within the scope of the present disclosure.
  • FIG. 9 is a block diagram of a BS 900 according to one or more aspects of the present disclosure.
  • the BS 900 may be a BS 105 as discussed in relation to FIG. 1.
  • the BS 900 may include a processor 902, a memory 904, a configuration module 907, an LBT status module 908, a communication module 909, a transceiver 910 including a modem subsystem 912 and a radio frequency (RF) unit 914, and one or more antennas 916.
  • RF radio frequency
  • the processor 902 may include a central processing unit (CPU) , a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
  • the processor 902 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.
  • the memory 904 may include a cache memory (e.g., a cache memory of the processor 902) , random access memory (RAM) , magnetoresistive RAM (MRAM) , read-only memory (ROM) , programmable read-only memory (PROM) , erasable programmable read only memory (EPROM) , electrically erasable programmable read only memory (EEPROM) , flash memory, solid state memory device, hard disk drives, other forms of volatile and non-volatile memory, or a combination of different types of memory.
  • the memory 904 includes a non-transitory computer-readable medium.
  • the memory 904 may store, or have recorded thereon, instructions 906.
  • the instructions 906 may include instructions that, when executed by the processor 902, cause the processor 902 to perform the operations described herein with reference to the BSs in connection with aspects of the present disclosure, for example, aspects of FIGs. 1-8, 11, and 12. Instructions 906 may also be referred to as program code.
  • the program code may be for causing a wireless communication device to perform these operations, for example by causing one or more processors (such as processor 902) to control or command the wireless communication device to do so.
  • the terms “instructions” and “code” should be interpreted broadly to include any type of computer-readable statement (s) .
  • the terms “instructions” and “code” may refer to one or more programs, routines, sub-routines, functions, procedures, etc. “Instructions” and “code” may include a single computer-readable statement or many computer-readable statements.
  • the configuration module 907, the LBT status module 908, and/or the communication module 909 may be implemented via hardware, software, or combinations thereof.
  • the configuration module 907, the LBT status module 908, and/or the communication module 909 may be implemented as a processor, circuit, and/or instructions 906 stored in the memory 904 and executed by the processor 902. In some instances, the configuration module 907, the LBT status module 908, and/or the communication module 909 can be integrated within the modem subsystem 912.
  • the configuration module 907, the LBT status module 908, and/or the communication module 909 can be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 912.
  • the configuration module 907, the LBT status module 908, and/or the communication module 909 may be used for various aspects of the present disclosure, for example, aspects of FIGs. 1-8, 11, and 12.
  • the configuration module 907 may be configured to communicate, with a second wireless communication device, a configuration indicating a first RB set of a plurality of RB sets in a shared radio frequency band being unavailable for communication. For instance, the configuration module 907 may be configured to transmit the configuration to a UE 115.
  • the LBT status module 908 may be configured to communicate, with the second wireless communication device, a COT-SI indicating an LBT status in the shared radio frequency band. For instance, the LBT status module 908 may be configured to transmit the COT-SI indicating the LBT status to a UE 115.
  • the communication module 909 may be configured to communicate, with the second wireless communication device in one or more RB sets of the plurality of RB sets excluding the first RB set, a first communication signal based on the configuration and the COT-SI.
  • the communication module 909 may be configured to transmit a DL communication signal based on the configuration and the COT-SI to a UE 115 and/or receive an UL communication signal based on the configuration and the COT-SI from the UE 115.
  • the configuration module 907 may be configured to communicate, with a second wireless communication device, a configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band.
  • the configuration module 907 may be configured to transmit the configuration to a UE 115.
  • the LBT status module 908 may be configured to communicate, with the second wireless communication device, a COT-SI indicating an LBT status in the shared radio frequency band. For instance, the LBT status module 908 may be configured to transmit the COT-SI indicating the LBT status to a UE 115.
  • the communication module 909 may be configured to communicate, with the second wireless communication device in one or more RB sets of the plurality of RB sets, a first communication signal based on the configuration and the COT-SI.
  • the communication module 909 may be configured to transmit a DL communication signal based on the configuration and the COT-SI to a UE 115 and/or receive an UL communication signal based on the configuration and the COT-SI from the UE 115.
  • the transceiver 910 may include the modem subsystem 912 and the RF unit 914.
  • the transceiver 910 can be configured to communicate bi-directionally with other devices, such as the UEs 115 and/or another core network element.
  • the modem subsystem 912 may be configured to modulate and/or encode data according to a modulation and coding schemes (MCS) , e.g., a low density parity check (LDPC) coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.
  • MCS modulation and coding schemes
  • LDPC low density parity check
  • the RF unit 914 may be configured to process (e.g., perform analog to digital conversion or digital to analog conversion, etc.
  • modulated/encoded data e.g., grants, COT-SI indicating an LBT status, configuration indicating one or more RB sets being unavailable for communication (e.g., RRC configuration) , configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, availability bitmap, DCI, DL communication, LBT bitmap, etc.
  • modulated/encoded data e.g., grants, COT-SI indicating an LBT status, configuration indicating one or more RB sets being unavailable for communication (e.g., RRC configuration) , configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, availability bitmap, DCI, DL communication, LBT bitmap, etc.
  • the RF unit 914 may be further configured to perform analog beamforming in conjunction with the digital beamforming. Although shown as integrated together in transceiver 910, the modem subsystem 912 and/or the RF unit
  • the RF unit 914 may provide the modulated and/or processed data, e.g. data packets (or, more generally, data messages that may contain one or more data packets and other information) , to the antennas 916 for transmission to one or more other devices. This may include, for example, transmission of information to complete attachment to a network and communication with a camped UE 115 or 1000 according to some aspects of the present disclosure.
  • the antennas 916 may further receive data messages transmitted from other devices and provide the received data messages for processing and/or demodulation at the transceiver 910.
  • the transceiver 910 may provide the demodulated and decoded data (e.g., UL communication, etc. ) to the configuration module 907, the LBT status module 908, and/or the communication module 909 for processing.
  • the antennas 916 may include multiple antennas of similar or different designs in order to sustain multiple transmission links.
  • the transceiver 910 is configured to transmit a configuration indicating a first RB set of a plurality of RB sets in a shared radio frequency band being unavailable for communication by coordinating with the configuration module 907. In an aspect, the transceiver 910 is configured to transmit a COT-SI indicating an LBT status in the shared radio frequency band by coordinating with the LBT status module 908.
  • the transceiver 910 is configured to transmit in one or more RB sets of the plurality of RB sets excluding the first RB set, a DL communication signal based on the configuration and the COT-SI and/or receive in one or more RB sets of the plurality of RB sets excluding the first RB set, an UL communication signal based on the configuration and the COT-SI by coordinating with the communication module 909.
  • the transceiver 910 is configured to transmit a configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band by coordinating with the configuration module 907.
  • the transceiver 910 is configured to transmit in one or more RB sets of the plurality of RB sets, a DL communication signal based on the configuration and the COT-SI and/or receive in one or more RB sets of the plurality of RB sets, an UL communication signal based on the configuration and the COT-SI by coordinating with the communication module 909.
  • the BS 900 can include multiple transceivers 910 implementing different RATs (e.g., NR and LTE) .
  • the BS 900 can include a single transceiver 910 implementing multiple RATs (e.g., NR and LTE) .
  • the transceiver 910 can include various components, where different combinations of components can implement different RATs.
  • FIG. 10 is a block diagram of a UE 1000 according to one or more aspects of the present disclosure.
  • the UE 1000 may be a UE 115 discussed in relation to FIG. 1.
  • the UE 1000 may include a processor 1002, a memory 1004, a configuration module 1007, an LBT status module 1008, a communication module 1009, a transceiver 1010 including a modem subsystem 1012 and an RF unit 1014, and one or more antennas 1016. These elements may be in direct or indirect communication with each other, for example via one or more buses.
  • the processor 1002 may have various features as a specific-type processor. For example, these may include a CPU, a DSP, an ASIC, a controller, a FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
  • the processor 1002 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.
  • the memory 1004 may include a cache memory (e.g., a cache memory of the processor 1002) , RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, a solid state memory device, one or more hard disk drives, memristor-based arrays, other forms of volatile and non- volatile memory, or a combination of different types of memory.
  • the memory 1004 may include a non-transitory computer-readable medium.
  • the memory 1004 may store instructions 1006.
  • the instructions 1006 may include instructions that, when executed by the processor 1002, cause the processor 1002 to perform operations described herein, for example, aspects of FIGs. 1-8, 11, and 12. Instructions 1006 may also be referred to as code, which may be interpreted broadly to include any type of computer-readable statement (s) as discussed above with respect to FIG. 9.
  • the configuration module 1007, the LBT status module 1008, and/or the communication module 1009 may be implemented via hardware, software, or combinations thereof.
  • the configuration module 1007, the LBT status module 1008, and/or the communication module 1009 may be implemented as a processor, circuit, and/or instructions 1006 stored in the memory 1004 and executed by the processor 1002.
  • the configuration module 1007, the LBT status module 1008, and/or the communication module 1009 can be integrated within the modem subsystem 1012.
  • the configuration module 1007, the LBT status module 1008, and/or the communication module 1009 can be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 1012.
  • the configuration module 1007, the LBT status module 1008, and/or the communication module 1009 may be used for various aspects of the present disclosure, for example, aspects of FIGs. 1-8, 11, and 12.
  • the configuration module 1007 may be configured to communicate, with a second wireless communication device, a configuration indicating a first RB set of a plurality of RB sets in a shared radio frequency band being unavailable for communication. For instance, the configuration module 1007 may be configured to receive the configuration from a BS 105.
  • the LBT status module 1008 may be configured to communicate, with the second wireless communication device, a COT-SI indicating an LBT status in the shared radio frequency band. For instance, the LBT status module 1008 may be configured to receive the COT-SI indicating the LBT status from a BS 105.
  • the communication module 1009 may be configured to communicate, with the second wireless communication device in one or more RB sets of the plurality of RB sets excluding the first RB set, a first communication signal based on the configuration and the COT-SI.
  • the communication module 1009 may be configured to receive a DL communication signal based on the configuration and the COT-SI from a BS 105 and/or transmit an UL communication signal based on the configuration and the COT-SI to the BS 105.
  • the configuration module 1007 may be configured to communicate, with a second wireless communication device, a configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band.
  • the configuration module 1007 may be configured to receive the configuration from a BS 105.
  • the LBT status module 1008 may be configured to communicate, with the second wireless communication device, a COT-SI indicating an LBT status in the shared radio frequency band.
  • the LBT status module 1008 may be configured to receive the COT-SI indicating the LBT status from a BS 105.
  • the communication module 1009 may be configured to communicate, with the second wireless communication device in one or more RB sets of the plurality of RB sets, a first communication signal based on the configuration and the COT-SI.
  • the communication module 1009 may be configured to receive a DL communication signal based on the configuration and the COT-SI from a BS 105 and/or transmit an UL communication signal based on the configuration and the COT-SI to the BS 105.
  • the transceiver 1010 may include the modem subsystem 1012 and the RF unit 1014.
  • the transceiver 1010 can be configured to communicate bi-directionally with other devices, such as the BS 105 or the BS 900.
  • the modem subsystem 1012 may be configured to modulate and/or encode the data from the memory 1004 and/or the configuration module 1007, the LBT status module 1008, and/or the communication module 1009 according to an MCS, e.g., a LDPC coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.
  • the RF unit 1014 may be configured to process (e.g., perform analog to digital conversion or digital to analog conversion, etc.
  • modulated/encoded data e.g., UL communication, etc.
  • the RF unit 1014 may be further configured to perform analog beamforming in conjunction with the digital beamforming.
  • the modem subsystem 1012 and the RF unit 1014 may be separate devices that are coupled together at the UE 1000 to enable the UE 1000 to communicate with other devices.
  • the RF unit 1014 may provide the modulated and/or processed data, e.g. data packets (or, more generally, data messages that may contain one or more data packets and other information) , to the antennas 1016 for transmission to one or more other devices.
  • the antennas 1016 may further receive data messages transmitted from other devices.
  • the antennas 1016 may provide the received data messages for processing and/or demodulation at the transceiver 1010.
  • the transceiver 1010 may provide the demodulated and decoded data (e.g., grants, COT-SI indicating an LBT status, configuration indicating one or more RB sets being unavailable for communication (e.g., RRC configuration) , configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, availability bitmap, DCI, DL communication, LBT bitmap, etc. ) to the configuration module 1007, the LBT status module 1008, and/or the communication module 1009 for processing.
  • the antennas 1016 may include multiple antennas of similar or different designs in order to sustain multiple transmission links.
  • the RF unit 1014 may configure the antennas 1016.
  • the transceiver 1010 is configured to receive a configuration indicating a first RB set of a plurality of RB sets in a shared radio frequency band being unavailable for communication by coordinating with the configuration module 1007. In an aspect, the transceiver 1010 is configured to receive a COT-SI indicating an LBT status in the shared radio frequency band by coordinating with the LBT status module 1008.
  • the transceiver 1010 is configured to transmit in one or more RB sets of the plurality of RB sets excluding the first RB set, an UL communication signal based on the configuration and the COT-SI and/or receive in one or more RB sets of the plurality of RB sets excluding the first RB set, a DL communication signal based on the configuration and the COT-SI by coordinating with the communication module 1009.
  • the transceiver 1010 is configured to receive a configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band by coordinating with the configuration module 1007.
  • the transceiver 1010 is configured to transmit in one or more RB sets of the plurality of RB sets, an UL communication signal based on the configuration and the COT-SI and/or receive in one or more RB sets of the plurality of RB sets, a DL communication signal based on the configuration and the COT-SI by coordinating with the communication module 1009.
  • the UE 1000 can include multiple transceivers 1010 implementing different radio access technologies (RATs) (e.g., NR and LTE) .
  • RATs radio access technologies
  • the UE 1000 can include a single transceiver 1010 implementing multiple RATs (e.g., NR and LTE) .
  • the transceiver 1010 can include various components, where different combinations of components can implement different RATs.
  • FIG. 11 is a flow diagram of a communication method 1100 according to one or more aspects of the present disclosure.
  • Blocks of the method 1100 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for executing the blocks.
  • a wireless communication device such as the BS 115 and/or BS 900 may utilize one or more components, such as the processor 902, the memory 904, the configuration module 907, the LBT status module 908, the communication module 909, the transceiver 910, the modem 912, the RF unit 914, and the one or more antennas 916 to execute the blocks of method 1100.
  • a wireless communication device such as the UE 115 and/or the UE 1000 may utilize one or more components, such as the processor 1002, the memory 1004, the configuration module 1007, the LBT status module 1008, the communication module 1009, the transceiver 1010, the modem 1012, the RF unit 1014, and the one or more antennas 1016 to execute the blocks of method 1100.
  • the method 1100 may employ similar mechanisms as in the configuration scheme 300, the LBT status communication scheme 400, the LBT status communication scheme 500, the LBT status communication scheme 600, the configuration scheme 700, and/or the LBT status communication scheme 800 described above with respect to FIGs. 3, 4, 5, 6, 7, and/or 8, respectively.
  • the method 1100 includes a number of enumerated blocks, but aspects of the method 1100 may include additional blocks before, after, and in between the enumerated blocks. In some aspects, one or more of the enumerated blocks may be omitted or performed in a different order.
  • the method 1100 includes communicating, with a second wireless communication device, a configuration indicating a first RB set of a plurality of RB sets in a shared radio frequency band being unavailable for communication.
  • the first RB set may be semi-statically unavailable, and the plurality of RBs sets may be spaced apart from each other by one or more guard bands in the shared radio frequency band. Additionally or alternatively, a single CC may span the plurality of RBs in the shared radio frequency band.
  • An example of the configuration may be, for example, the configuration 300 in FIG. 3.
  • the BS 105 transmits to a UE 115, the configuration indicating a first RB set of a plurality of RB sets in a shared radio frequency band being unavailable for communication.
  • the UE 115 receives from a BS 105, the configuration indicating a first RB set of a plurality of RB sets in a shared radio frequency band being unavailable for communication.
  • a first wireless communication device may communicate the configuration by communicating an RRC configuration.
  • the RRC configuration may include an availability bitmap indicating whether each RB set of the plurality of RB sets is unavailable.
  • An example of an availability bitmap may be, for example, the availability bitmap 340 in FIG. 3.
  • Each bit in the availability bitmap having a first value may indicate that an RB set corresponding to the respective bit is available, and each bit in the availability bitmap having a second value different from the first value may indicate that an RB set corresponding to the respective bit is unavailable.
  • the first value may have a bit value of 1, and the second value may have a bit value of 0.
  • the first value may have a bit value of 0, and the second value may have a bit value of 1.
  • the method 1100 includes communicating, with the second wireless communication device, a COT-SI indicating an LBT status in the shared radio frequency band.
  • the BS 105 transmits to a UE 115, the COT-SI indicating an LBT status in the shared radio frequency band.
  • the BS 105 may transmit PDCCH carrying DCI including the COT-SI.
  • the UE 115 receives from a BS 105, the COT-SI indicating an LBT status in the shared radio frequency band.
  • a first wireless communication device e.g., the BS 105 or the UE 115
  • An example of an LBT bitmap may be, for example, the LBT bitmap 540 in FIG. 5, the LBT bitmap 640 in FIG. 6, or the LBT bitmap 840 in FIG. 8.
  • the first wireless communication device may perform an LBT in a first set of LBT bandwidths including a first subset of the plurality of RB sets.
  • the first subset of RBs may exclude each RB set that is indicated as unavailable for communication by the configuration, and the LBT status may include each LBT result based on performing the LBT in the first set of LBT bandwidths.
  • the first subset of RBs may include a first number of RB sets, the LBT bitmap may include a second number of bits corresponding to the first subset of RBs, and each bit in the LBT bitmap corresponding to an RB set of the first subset of RBs may indicate an LBT result for the corresponding RB set.
  • the first number may be the same as the second number.
  • the first wireless communication device may determine a second subset of the plurality of RB sets.
  • the second subset of RBs may include each RB set that is indicated as unavailable for communication by the configuration, and the second subset of RBs may be mutually exclusive of the first subset of RBs and include a third number of RB sets.
  • the LBT bitmap may include a sum of the second number of bits and a fourth number of bits, where the fourth number of bits corresponds to the second subset of RBs.
  • Each bit in the LBT bitmap corresponding to an RB set of the second subset may indicate an LBT result for the corresponding RB set, where the third number is the same as the fourth number.
  • Each bit in the LBT bitmap may indicate that an RB set corresponding to the second subset is unavailable.
  • the UE 115 may determine not to perform an LBT in a second set of LBT bandwidths including the second subset of the plurality of RB sets.
  • the UE 115 may perform an AND operation based on the availability and LBT bitmaps and determine, based on performing the AND operation, an availability of each RB set of the plurality of RB sets.
  • the method 1100 includes communicating, with the second wireless communication device in one or more RB sets of the plurality of RB sets excluding the first RB set, a first communication signal based on the configuration and the COT-SI.
  • the first wireless communication device is or includes a BS 105
  • the second wireless communication device is or includes a UE 115.
  • the BS 105 may communicate the first communication signal by transmitting in one or more RB sets of the plurality of RB sets excluding the first RB set, a DL communication signal to a UE 115 and/or by receiving in one or more RB sets of the plurality of RB sets excluding the first RB set, an UL communication signal from a UE 115.
  • the first wireless communication device is or includes a UE 115
  • the second wireless communication device is or includes a BS 105.
  • the UE 115 may communicate the first communication signal by transmitting in one or more RB sets of the plurality of RB sets excluding the first RB set, an UL communication signal to a BS 105 and/or by receiving in one or more RB sets of the plurality of RB sets excluding the first RB set, a DL communication signal from a BS 105.
  • FIG. 12 is a flow diagram of a communication method 1200 according to one or more aspects of the present disclosure.
  • Blocks of the method 1200 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for executing the blocks.
  • a wireless communication device such as the BS 105 and/or BS 900 may utilize one or more components, such as the processor 902, the memory 904, the configuration module 907, the LBT status module 908, the communication module 909, the transceiver 910, the modem 912, the RF unit 914, and the one or more antennas 916 to execute the blocks of method 1200.
  • a wireless communication device such as the UE 115 and/or the UE 1000 may utilize one or more components, such as the processor 1002, the memory 1004, the configuration module 1007, the LBT status module 1008, the communication module 1009, the transceiver 1010, the modem 1012, the RF unit 1014, and the one or more antennas 1016 to execute the blocks of method 1200.
  • the method 1200 may employ similar mechanisms as in the configuration scheme 300, the LBT status communication scheme 400, the LBT status communication scheme 500, the LBT status communication scheme 600, the configuration scheme 700, and/or the LBT status communication scheme 800 described above with respect to FIGs. 3, 4, 5, 6, 7, and/or 8, respectively.
  • the method 1200 includes a number of enumerated blocks, but aspects of the method 1200 may include additional blocks before, after, and in between the enumerated blocks. In some aspects, one or more of the enumerated blocks may be omitted or performed in a different order
  • the method 1200 includes communicating, with a second wireless communication device, a configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band.
  • An example of the configuration may be, for example, the configuration 700 in FIG. 7.
  • the BS 105 transmits to a UE 115, the configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band.
  • the BS 105 may determine that a fourth RB set is unavailable for communication, where the fourth RB set is located between the second RB set and the third RB set, the second RB set and the fourth RB set are spaced apart by a third guard band, and the third RB set and the fourth RB set are spaced apart by a fourth guard band.
  • the BS 105 may configure the fourth RB set, the third guard band, and the fourth guard band as part of the second guard band. Accordingly, the second guard band may spans the third guard band, the fourth RB set, and the fourth guard band.
  • the UE 115 receives from a BS 105, the configuration indicating a plurality of RB sets spaced apart from each other by a guard band in a shared radio frequency band, where a first RB set of the plurality of RB sets and a second RB set of the plurality of RB sets are spaced apart by a first guard band, and where the second RB set and a third RB set of the plurality of RB sets are spaced apart by a second guard band having a different frequency bandwidth than the first guard band.
  • the method 1200 includes communicating, with the second wireless communication device, a COT-SI indicating an LBT status in the shared radio frequency band.
  • the BS 105 may transmit to the UE 115, the COT-SI indicating an LBT status in the shared radio frequency band.
  • the UE 115 may receive from the BS 105, the COT-SI indicating an LBT status in the shared radio frequency band.
  • a first wireless communication device may perform an LBT in a plurality of LBT bandwidths including the plurality of RB sets indicated by the configuration, where the LBT status includes an LBT result for each LBT in the plurality of LBT bandwidths.
  • the first wireless communication device may communicate the COT-SI by communicating an LBT bitmap indicating the LBT status, where each bit in the LBT bitmap corresponds to an RB set of the plurality of RB set and indicates an LBT result for the corresponding RB set.
  • Each bit in the LBT bitmap having a first value may indicate an LBT pass for a corresponding RB set, and each bit in the LBT bitmap having a second value different from the first value may indicate an LBT fail for a corresponding RB set.
  • the plurality of RB sets may include a first number of available RB sets, the LBT bitmap may include a second number of bits, and the first number may be the same as the second number.
  • the method 1200 includes communicating, with the second wireless communication device in one or more RB sets of the plurality of RB sets, a first communication signal based on the configuration and the COT-SI.
  • the first wireless communication device is or includes a BS 105
  • the second wireless communication device is or includes a UE 115.
  • the BS 105 may communicate the first communication signal by transmitting in one or more RB sets of the plurality of RB sets, a DL communication signal to a UE 115 and/or by receiving in one or more RB sets of the plurality of RB sets, an UL communication signal from a UE 115.
  • the first wireless communication device is or includes a UE 115
  • the second wireless communication device is or includes a BS 105.
  • the UE 115 may communicate the first communication signal by transmitting in one or more RB sets of the plurality of RB sets, an UL communication signal to a BS 105 and/or by receiving in one or more RB sets of the plurality of RB sets, a DL communication signal from a BS 105.
  • Information and signals may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • 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, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • “or” as used in a list of items indicates an inclusive list such that, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) .

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Abstract

Des systèmes et des procédés de communication sans fil, associés à des communications sans fil dans un système, sont divulgués. Un premier dispositif de communication sans fil peut communiquer avec un second dispositif de communication sans fil, une configuration indiquant un premier ensemble de blocs de ressources (RB) d'une pluralité d'ensembles RB dans une bande de fréquences radio partagée non disponible pour une communication. Le premier dispositif de communication sans fil peut communiquer avec le second dispositif de communication sans fil, un indicateur de structure de temps d'occupation de canal (COT-SI) indiquant un état de procédure « écouter avant de parler » (LBT) dans la bande de fréquences radio partagée. Le premier dispositif de communication sans fil peut communiquer avec le second dispositif de communication sans fil dans un ou plusieurs ensembles RB de la pluralité d'ensembles RB à l'exclusion du premier ensemble RB, un premier signal de communication basé sur la configuration et le COT-SI.
PCT/CN2020/095119 2020-06-09 2020-06-09 Disponibilité d'ensembles de blocs de ressources (rb) et d'état de procédure « écouter avant de parler » (lbt) associé aux ensembles rb WO2021248311A1 (fr)

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