WO2021146841A1 - Conception de point de synchronisation pour un mode d'équipement à base de charge - Google Patents

Conception de point de synchronisation pour un mode d'équipement à base de charge Download PDF

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Publication number
WO2021146841A1
WO2021146841A1 PCT/CN2020/073231 CN2020073231W WO2021146841A1 WO 2021146841 A1 WO2021146841 A1 WO 2021146841A1 CN 2020073231 W CN2020073231 W CN 2020073231W WO 2021146841 A1 WO2021146841 A1 WO 2021146841A1
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WIPO (PCT)
Prior art keywords
synchronization points
channel access
access procedure
channel
synchronization
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PCT/CN2020/073231
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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/CN2020/073231 priority Critical patent/WO2021146841A1/fr
Publication of WO2021146841A1 publication Critical patent/WO2021146841A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others

Definitions

  • the present disclosure relates generally to wireless communications and more specifically to synchronization point design for load-based equipment (LBE) mode.
  • LBE load-based equipment
  • 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) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • a wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • Devices such as base stations and UEs, may operate in a single operator network deployment. These devices may operate in a frame based equipment (FBE) operational mode, in which a fixed frame period structure is configured for the devices to use in channel acquisition. Base stations in such networks may contend for the channel using a one-shot listen-before-talk (LBT) procedure. Single operator network deployments with more flexible scheduling techniques may be desired.
  • FBE frame based equipment
  • LBT listen-before-talk
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support synchronization point design for a load-based equipment (LBE) mode.
  • the described techniques provide for a base station and a user equipment (UE) establishing a channel and identifying a set of synchronization points defining a plurality of different time intervals between synchronization points of the set of synchronization points.
  • the set of synchronization points may be associated with channel access opportunities during which the UE and the plurality of base stations can perform a channel access procedure to access a channel for a channel occupancy time.
  • the base station or the UE may perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points and transmit, based at least in part on a result of the channel access procedure, uplink or downlink signals to the base station or the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • a method of wireless communication at a UE may include establishing a connection with a base station of a set of base stations, identifying a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time, performing the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmitting, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to establish a connection with a base station of a set of base stations, identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time, perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmit, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the apparatus may include means for establishing a connection with a base station of a set of base stations, identifying a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time, performing the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmitting, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • a non-transitory computer-readable medium storing code for wireless communication at a UE is described.
  • the code may include instructions executable by a processor to establish a connection with a base station of a set of base stations, identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time, perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmit, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • identifying the set of synchronization points may include operations, features, means, or instructions for identifying that each synchronization point of the set of synchronization points may be usable by the set of base stations and the UE to perform the channel access procedure.
  • identifying the set of synchronization points may include operations, features, means, or instructions for identifying that a first subset of the set of synchronization points may be usable by the base station to perform the channel access procedure, and identifying that a second subset of the set of synchronization points may be usable by the UE to perform the channel access procedure, where the channel access opportunity may be associated with one of the second subset of the set of synchronization points.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that transmission of the uplink signals may be to end within a defined time period of the next synchronization point of a subset of the set of synchronization points that may be useable by the UE to perform the channel access procedure, and determining, based on the determining, the channel occupancy time to end before the next synchronization point.
  • performing the channel access procedure may include operations, features, means, or instructions for performing the channel access procedure in accordance with a first type of channel access procedure associated with the set of synchronization points, and identifying a second set of synchronization points defining a second set of different time intervals between synchronization points of the second set of synchronization points, the second set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a second type of channel access procedure different from the first type of channel access procedure and during the channel occupancy time.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, based on a result of a channel access procedure of the second type performed by the base station, downlink signals from the base station and during the channel occupancy time.
  • the first type of channel access procedure includes a category four listen-before-talk channel access procedure and the second type of channel access procedure includes a category two listen-before-talk channel access procedure.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the base station of the set of base stations, an indication of the set of synchronization points.
  • receiving the indication of the set of synchronization points may include operations, features, means, or instructions for identifying a system information block in a downlink shared channel transmission, the system information block including the indication of the set of synchronization points.
  • receiving the indication of the set of synchronization points may include operations, features, means, or instructions for receiving the indication via radio resource control signaling.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the base station, an indication of an amount of data to be transmitted, a quality of service associated with the data to be transmitted, or both, where the indication of the set of synchronization points may be received based on the transmitted indication.
  • identifying the set of synchronization points may include operations, features, means, or instructions for identifying the set of synchronization points based on a starting position of an uplink transmission configured via radio resource control signaling.
  • the uplink transmission includes a configured grant uplink transmission, a sounding reference signal, an uplink control channel transmission, or a combination thereof.
  • the set of base stations may be in a wireless network operating in a load based equipment mode.
  • a method of wireless communication at a base station may include establishing a connection with a UE of a set of UEs, identifying a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time, performing the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmitting, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to establish a connection with a UE of a set of UEs, identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time, perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmit, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the apparatus may include means for establishing a connection with a UE of a set of UEs, identifying a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time, performing the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmitting, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • a non-transitory computer-readable medium storing code for wireless communication at a base station is described.
  • the code may include instructions executable by a processor to establish a connection with a UE of a set of UEs, identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time, perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmit, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • identifying the set of synchronization points may include operations, features, means, or instructions for identifying that each synchronization point of the set of synchronization points may be usable by the set of UEs and the base station to perform the channel access procedure.
  • identifying the set of synchronization points may include operations, features, means, or instructions for identifying that a first subset of the set of synchronization points may be usable by the base station to perform the channel access procedure, where the channel access opportunity may be associated with one of the first subset of the set of synchronization points, and identifying that a second subset of the set of synchronization points may be usable by the UE to perform the channel access procedure.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that transmission of the downlink signals may be to end within a defined time period of the next synchronization point of a subset of the set of synchronization points that may be useable by the base station to perform the channel access procedure, and determining, based on the determining, the channel occupancy time to end before the next synchronization point.
  • performing the channel access procedure may include operations, features, means, or instructions for performing the channel access procedure in accordance with a first type of channel access procedure associated with the set of synchronization points, and identifying a second set of synchronization points defining a second set of different time intervals between synchronization points of the second set of synchronization points, the second set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a second type of channel access procedure different from the first type of channel access procedure and during the channel occupancy time.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, based on a result of a channel access procedure of the second type performed by the UE, uplink signals from the UE during the channel occupancy time.
  • the first type of channel access procedure includes a category four listen-before-talk channel access procedure and the second type of channel access procedure includes a category two listen-before-talk channel access procedure.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the UE, an indication of the set of synchronization points.
  • transmitting the indication of the set of synchronization points may include operations, features, means, or instructions for transmitting a downlink shared channel transmission including a system information block including the indication of the set of synchronization points.
  • transmitting the indication of the set of synchronization points may include operations, features, means, or instructions for transmitting the indication via radio resource control signaling.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the UE, an indication of an amount of data to be transmitted, a quality of service associated with the data to be transmitted, or both, where the set of synchronization points may be identified based on the received indication.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to a second UE, an indication of a second set of synchronization points different from the set of synchronization points.
  • transmitting the indication of the set of synchronization points may include operations, features, means, or instructions for transmitting a radio resource control signal that indicates a starting position of an uplink transmission, where the starting position indicates the set of synchronization points.
  • the uplink transmission includes a configured grant uplink transmission, a sounding reference signal, an uplink control channel transmission, or a combination thereof.
  • the set of UEs may be in a wireless network operating in a load based equipment mode.
  • FIG. 1 illustrates an example of a system for wireless communications that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIG. 2 illustrates an example of a wireless communications system that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIG. 3 illustrates an example of a synchronization point configuration that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIG. 4 illustrates an example of a synchronization point configuration that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIG. 5 illustrates an example of a process flow diagram that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIGs. 6 and 7 show block diagrams of devices that support synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIG. 8 shows a block diagram of a communications manager that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIG. 9 shows a diagram of a system including a device that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIGs. 10 and 11 show block diagrams of devices that support synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIG. 12 shows a block diagram of a communications manager that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIG. 13 shows a diagram of a system including a device that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • FIGs. 14 and 15 show flowcharts illustrating methods that support synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • LBE load based equipment
  • the LBE operational mode does not use a fixed periodic structure, which may improve flexibility for the wireless devices operating in the wireless network.
  • the LBE operational mode supports sending uplink information signals or channels at the beginning of a fix frame period (FFP) .
  • FFP fix frame period
  • UE user equipment
  • UE is not required to detect a downlink signal or channel (e.g., a transmission from its base station) before performing an uplink transmission.
  • aspects of the described LBE operational mode address techniques for avoiding cross link interference-based blocking (e.g., a listen-before-talk (LBT) failure due to another base station or UE transmitting nearby) , for reducing the overhead of a category 4 (Cat-4) LBT procedure (e.g., shorter time gaps) , and the like.
  • cross link interference-based blocking e.g., a listen-before-talk (LBT) failure due to another base station or UE transmitting nearby
  • Cat-4 LBT procedure e.g., shorter time gaps
  • devices of a wireless network operating in an LBE mode may be configured with a set of synchronization points that may be associated with channel access opportunities during which a device (e.g., UE or base station) may perform a channel access procedure. If the device successfully acquires a channel using the channel access procedure, then the device may use the channel for transmissions during a channel occupancy time that may be limited by the next synchronization point in the set. Further, the synchronization points may define different time intervals (e.g., associated with different device priorities, or QoS levels) , which may further enhance flexibility in the LBE network and prevent blocking by various devices.
  • the set of synchronization points may include a subset that is usable by a UE to perform the channel access procedure, while the set of synchronization points includes another subset that is usable by a base station to perform a channel access procedure. That is, separate subsets of synchronization points may be configured for various devices. Further, the set of synchronization points may be associated with a first type of channel access procedure (e.g., category (Cat) 4 listen-before-talk (LBT) ) . In such cases, another set of synchronization points may be defined within a pair of synchronization points associated with the Cat-4 LBT procedure. This other set of synchronization points may be associated with a Cat-2 LBT procedure.
  • Cat category 4 listen-before-talk
  • a device may use the other set of synchronization points for a Cat-2 LBT procedure and transmission while another device is occupying the channel based on a Cat-4 LBT procedure.
  • the Cat-4 LBT procedure may be associated with a first time duration longer than a second time durations associated with the Cat-2 LBT procedure.
  • aspects of the subject matter described herein may be implemented to realize one or more advantages.
  • the described techniques may support improvements in the LBE framework, decreasing signaling overhead, and improving reliability, among other advantages.
  • supported techniques may include improved network operations and, in some examples, may promote network efficiencies, among other benefits.
  • Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further described with respect to a wireless communications system with devices operating in a LBE mode, various synchronization point configurations, and a process flow diagram. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to synchronization point design for load-based equipment mode.
  • FIG. 1 illustrates an example of a wireless communications system 100 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the wireless communications system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-A Pro
  • NR New Radio
  • the wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.
  • ultra-reliable e.g., mission critical
  • the base stations 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may be devices in different forms or having different capabilities.
  • the base stations 105 and the UEs 115 may wirelessly communicate via one or more communication links 125.
  • Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base station 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a base station 105 and a UE 115 may support the communication of signals according to one or more radio access technologies.
  • the UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times.
  • the UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1.
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115, the base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment) , as shown in FIG. 1.
  • network equipment e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment
  • the base stations 105 may communicate with the core network 130, or with one another, or both.
  • the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via an S1, N2, N3, or other interface) .
  • the base stations 105 may communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) , or indirectly (e.g., via core network 130) , or both.
  • the backhaul links 120 may be or include one or more wireless links.
  • One or more of the base stations 105 described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or other suitable terminology.
  • a base transceiver station a radio base station
  • an access point a radio transceiver
  • a NodeB an eNodeB (eNB)
  • eNB eNodeB
  • a next-generation NodeB or a giga-NodeB either of which may be referred to as a gNB
  • gNB giga-NodeB
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC machine type communications
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • devices such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • the UEs 115 and the base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers.
  • the term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links 125.
  • a carrier used for a communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) .
  • BWP bandwidth part
  • Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling.
  • the wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • a carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN) ) and may be positioned according to a channel raster for discovery by the UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • a carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology) .
  • the communication links 125 shown in the wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115.
  • Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • a carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) .
  • Devices of the wireless communications system 100 e.g., the base stations 105, the UEs 115, or both
  • the wireless communications system 100 may include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths.
  • each served UE 115 may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
  • Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) .
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams) , and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE 115.
  • One or more numerologies for a carrier may be supported, where a numerology may include a subcarrier spacing ( ⁇ f) and a cyclic prefix.
  • a carrier may be divided into one or more BWPs having the same or different numerologies.
  • a UE 115 may be configured with multiple BWPs.
  • a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) .
  • Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
  • SFN system frame number
  • Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration.
  • a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots.
  • each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing.
  • Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
  • a subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) .
  • TTI duration e.g., the number of symbol periods in a TTI
  • the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region e.g., a control resource set (CORESET)
  • CORESET control resource set
  • a control region for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier.
  • One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115.
  • one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner.
  • An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size.
  • Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
  • Each base station 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof.
  • the term “cell” may refer to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) .
  • a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) over which the logical communication entity operates.
  • Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station 105.
  • a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas 110, among other examples.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells.
  • Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) .
  • a base station 105 may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
  • protocol types e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB)
  • NB-IoT narrowband IoT
  • eMBB enhanced mobile broadband
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105.
  • the overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.
  • the wireless communications system 100 may support synchronous or asynchronous operation.
  • the base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately aligned in time.
  • the base stations 105 may have different frame timings, and transmissions from different base stations 105 may, in some examples, not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Some UEs 115 may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) .
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) .
  • half-duplex communications may be performed at a reduced peak rate.
  • Other power conservation techniques for the UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications) , or a combination of these techniques.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • the wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof.
  • the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications.
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions) .
  • Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT) , mission critical video (MCVideo) , or mission critical data (MCData) .
  • MCPTT mission critical push-to-talk
  • MCVideo mission critical video
  • MCData mission critical data
  • Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications.
  • the terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein.
  • a UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol) .
  • D2D device-to-device
  • P2P peer-to-peer
  • One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105.
  • groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs 115 without the involvement of a base station 105.
  • the D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115) .
  • vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these.
  • V2X vehicle-to-everything
  • V2V vehicle-to-vehicle
  • a vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system.
  • vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., base stations 105) using vehicle-to-network (V2N) communications, or with both.
  • V2N vehicle-to-network
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) .
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management function
  • S-GW serving gateway
  • PDN Packet Data Network gateway
  • UPF user plane function
  • the control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the base stations 105 associated with the core network 130.
  • NAS non-access stratum
  • User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions.
  • the user plane entity may be connected to the network operators IP services 150.
  • the operators IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
  • Some of the network devices may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC) .
  • Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs) .
  • Each access network transmission entity 145 may include one or more antenna panels.
  • various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105) .
  • the wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors.
  • the transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • the wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band, or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band.
  • SHF super high frequency
  • EHF extremely high frequency
  • the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the base stations 105, and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions.
  • the techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • the wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • devices such as the base stations 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • a base station 105 or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.
  • the base stations 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords) .
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) , where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • a base station 105 or a UE 115 may use beam sweeping techniques as part of beam forming operations.
  • a base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE 115.
  • Some signals e.g., synchronization signals, reference signals, beam selection signals, or other control signals
  • the base station 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission.
  • Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the base station 105.
  • a transmitting device such as a base station 105
  • a receiving device such as a UE 115
  • Some signals may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) .
  • the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report to the base station 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
  • transmissions by a device may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station 105 to a UE 115) .
  • the UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands.
  • the base station 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS) ) , which may be precoded or unprecoded.
  • a reference signal e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS)
  • CRS cell-specific reference signal
  • CSI-RS channel state information reference signal
  • the UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook) .
  • PMI precoding matrix indicator
  • codebook-based feedback e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook
  • a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .
  • a receiving device may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • receive configurations e.g., directional listening
  • a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions.
  • receive beamforming weight sets e.g., different directional listening weight sets
  • a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal) .
  • the single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions) .
  • SNR signal-to-noise ratio
  • the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack.
  • communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based.
  • a Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency.
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or a core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • transport channels may be mapped to physical channels.
  • the UEs 115 and the base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link 125.
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions) .
  • a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • Various devices of the wireless communications system 100 may operate in a single operator network deployment including a plurality of base stations 105 and UEs 115.
  • base stations 105 and UEs 115 may operate in a LBE mode, in which base stations 105 and UEs 115 may contend for a channel by performing a channel access procedure during channel access opportunity times associated with synchronization points defining a plurality of different time intervals in accordance with the techniques described herein.
  • the synchronization points may be configured by a base station 105. Further, separate subsets of synchronization points may be configured for base stations 105 and UEs 115.
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • wireless communications system 200 may implement aspects of wireless communications system 100.
  • Wireless communications system 200 may be an example of a single operator network 205 deployment using a plurality of base stations 210 and UEs 215, which may be examples of the corresponding devices described herein. Although the techniques described herein are generally discussed in terms of a single operator network 205, it is to be understood that these techniques may be applicable for any wireless device communicating in any network deployment scenario.
  • wireless communications system 200 operates over a shared (e.g., shared licensed) or unlicensed radio frequency spectrum band.
  • wireless communications system 200 may provide enhancements to ensure feature compatibility with communications in a shared or unlicensed radio frequency spectrum band in a controlled environment.
  • the communications may include ultra-reliable/low-latency communications (URLLC) , IoT communications (e.g., industrial IoT (IIoT) ) , and the like.
  • URLLC ultra-reliable/low-latency communications
  • IoT communications e.g., industrial IoT (IIoT)
  • IoT communications e.g., industrial IoT (IoT)
  • IoT communications e.g., industrial IoT (IoT)
  • IoT industrial IoT
  • One example use case of a controlled environment may be a single operator network 205 (e.g., a factory owner) with the ability to control the deployment and the interference environment. Other example use cases may also be considered.
  • Such wireless network deployments utilize an FBE operational mode.
  • One advantage of the FBE operational mode is that there may be no need for a category four (Cat-4) LBT procedure due to the rigid scheduling implementing the FFP structure.
  • the FBE operational mode typically includes each base station in the wireless network announcing that it is operating in the FBE mode and indicating (e.g., configuring) the FFP in its SIB1 broadcast message. Only the base stations in the network can contend for the channel using a one-shot LBT procedure at the beginning of each FFP.
  • An idle duration (e.g., a gap period) may be designed at the end of one FFP/before the beginning of the next FFP to allow the LBT procedure to be performed.
  • UE transmissions within an FFP are conditioned on the UE detecting a transmission by its source or serving base station in the same FFP.
  • a certain processing timeline may be used for the UE to detect the downlink signal (e.g., the base station transmission) and respond.
  • cross link blocking may be handled by scheduler implementation. This may include aligning the FFP of all base stations in the wireless network so that they are contending for the channel at the same time, and therefore will not block each other.
  • scheduler implementation may include aligning the FFP of all base stations in the wireless network so that they are contending for the channel at the same time, and therefore will not block each other.
  • wireless networks operating according to an FBE operational mode typically experience waste in that many of the resources within the FFP often go unused.
  • a base station may capture an FFP for a small downlink burst, but its UEs may not have information to communicate during the FFP. This not only wastes the resources within the FFP, but also blocks out neighboring base stations/UEs from communicating during the FFP because it was captured by another base station.
  • this FBE operational mode is rigid in its synchronization and deployment, which limits the ability of the network to adapt to changing communication requirements. That is, changes to the FFP structure would require an update by all devices operating within the wireless network.
  • This technique does not provide flexibility for a base station to control the frequency (e.g., periodicity) of its synchronization points within the FFP.
  • this FBE operational mode prevents a UE from capturing an FFP for wireless communications, which may be especially problematic in the situation where the UE has information ready to communicate, but its base station does not (and therefore does not capture the channel) .
  • aspects of the described techniques implement an LBE operational mode within a wireless network, which may provide numerous advantages.
  • the LBE operational mode does not use a fixed periodic structure, which may improve flexibility for the wireless devices operating in the wireless network, such as base stations 210 and/or UE 215.
  • the LBE operational mode supports sending uplink information signals or channels at the beginning of the FFP.
  • a UE such as UE 215 is not required to detect a downlink signal or channel (e.g., a transmission from its base station) before performing an uplink transmission.
  • aspects of the described LBE operational mode address techniques for avoiding cross link interference-based blocking (e.g., an LBT failure due to another base station 210 or UE 215 transmitting nearby) , for reducing the overhead of a Cat-4 LBT procedure (e.g., shorter time gaps) , and the like.
  • cross link interference-based blocking e.g., an LBT failure due to another base station 210 or UE 215 transmitting nearby
  • reducing the overhead of a Cat-4 LBT procedure e.g., shorter time gaps
  • the UEs 215 and the base station 210 may be configured with a set of synchronization points 220 (e.g., synchronization point 220-a, synchronization point 220-b, synchronization point 220-c, synchronization point 220-c, synchronization point 220-e, and synchronization point 220-f) that function as potential starting points for channel access procedures, such as a listen-before-talk (LBT) procedure.
  • the set of synchronization points 220 may be configured via radio resource control (RRC) signaling, system information block (SIB) messaging (e.g., a SIB1) , or the like.
  • RRC radio resource control
  • SIB system information block
  • each UE 215 that receives the SIB from a base station 210 via a broadcast or shared channel may share the common set of synchronization points 220.
  • each UE 215 may be separately configured with the same or different set of synchronization points 220.
  • a UE 215 may signal the amount of data or a quality of service (QoS) associated with data to be transmitted by the UE 215 to a base station 210.
  • the base station 210 may select a set of synchronization points 220 for the UE 215 based on the signaled amount of data or QoS.
  • QoS quality of service
  • a UE 215 with a relatively high amount of data or high QoS may receive more synchronization points 220 that may be used for channel acquisition.
  • a UE 215 with a relatively low amount of data or low QoS may receive fewer synchronization points 220 to use for channel acquisition.
  • the set of synchronization points 220 are not explicitly signaled to the UEs 215. That is, the UEs 215 may deduce the set of synchronization points 220 using other information.
  • the timing of the set of synchronization points 220 may correspond to or may be determined based on an uplink transmission scheduled via RRC signaling.
  • the uplink transmission may be a configured grant uplink transmission, a sounding reference signal, an uplink control channel, or the like.
  • the UE 215 may identify the set of synchronization points 220 based on the starting location of the uplink transmission. That is, set of synchronization points 220 may be identified using a set of fixed or dynamic time periods relative to the starting location of the uplink transmission.
  • the synchronization points 220 may correspond to points at which the devices (e.g., the base stations 210 and the UEs 215) may initiate performance of a category four (Cat-4) LBT procedure. Further, the synchronization points 220 may be shared between the base stations 210 and the UEs 215. That is, the base station 210 or the UE 215 may contend for the channel using a configured synchronization point 220. In other examples, the base station 210 may be configured with a first set of synchronization, and the UEs 215 may be configured with a second set of synchronization points 220.
  • the synchronization points 220 may define set of time intervals. In some cases, each time interval defined by a pair of synchronization points 220 is different. Each synchronization point 220 may be associated with a channel access opportunity during which a UE 215 and a plurality of base stations 210 may perform a channel access procedure to access the channel for a channel occupancy time. The synchronization points 220 may also define a limit for a channel occupancy time (COT) .
  • COT channel occupancy time
  • the next synchronization point in the set of synchronization points 220 may define a limit for a channel occupancy time in which the device may use the channel. More particularly, the accessing device may cease transmission on the channel before the next synchronization point 220.
  • the next synchronization point 220 corresponds to the next synchronization point that may be used by a base station 210, a UE 215, or both a base station 210 and a UE 215, as described in further detail below.
  • FIG. 3 illustrates an example of a synchronization point configuration 300 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • synchronization point configuration 300 may be implemented by the wireless communications system 100.
  • the synchronization point configuration 300 includes a set of synchronization points 305 (e.g., synchronization point 305-a, synchronization point 305-b, synchronization point 305-c, and synchronization point 305-d) that may be used by a base station (e.g., base station 105 of FIG. 1 or base station 210 of FIG. 2) for performing a channel access procedure (e.g., a Cat-4 LBT) during a channel opportunity associated with one of the synchronization points 305.
  • a base station e.g., base station 105 of FIG. 1 or base station 210 of FIG. 2
  • a channel access procedure e.g., a Cat-4 LBT
  • the synchronization point configuration 300 also includes a set of synchronization points 310 (e.g., synchronization point 310-a, synchronization point 310-b, synchronization point 310-c, and synchronization point 310-d) that may be used by a UE (e.g., a UE 115 of FIG. 1 or UE 215 of FIG. 1) for performing a channel access procedure (e.g., a Cat-4 LBT) during a channel opportunity associated with one of the synchronization points 310.
  • a UE e.g., a UE 115 of FIG. 1 or UE 215 of FIG. 1
  • a channel access procedure e.g., a Cat-4 LBT
  • a set of synchronization points may include a subset of synchronization points 305 configured for utilization by a base station to perform the channel access procedure and a subset of synchronization points 310 for utilization by a UE to perform the channel access procedure.
  • a channel occupancy time associated with acquisition of a channel as a result of the channel access procedure may be limited by a synchronization point in the same subset of synchronization points or by a synchronization point in a different subset of synchronization points.
  • a base station may acquire a channel via a channel access procedure associated with the synchronization point 305-a and use the channel during a channel occupancy time 315-a that is limited by the next synchronization point 305-b in the same subset of synchronization points 305. That is, the channel occupancy time 315-a may be limited by the next synchronization point 305-b that is configured for utilization by the base station 105 or 215. Accordingly, the base station 105 or 215 may cease downlink transmissions before the next synchronization point 305-b.
  • a base station may acquire a channel via a channel access procedure associated with the synchronization point 305-b and use the channel during a channel occupancy time 315-b that is limited by the next synchronization point 310-b in the set of synchronization points. That is, the channel occupancy time 315-b may be limited by the next synchronization point 310-b that is configured for utilization by the UE 115 or 215. In such cases, the channel occupancy time may be limited by the next synchronization point in a set that includes synchronization points 305 and 310, whether the next synchronization point 305 or 310 is usable by the same device (e.g., base station 105 or UE 115) that acquired the channel or not.
  • the same device e.g., base station 105 or UE 115
  • a UE may acquire a channel via a channel access procedure associated with the synchronization point 310-b and use the channel during a channel occupancy time 320-a that is limited by the next synchronization point 310-c in the same subset of synchronization points 310. That is, the channel occupancy time 320-a may be limited by the next synchronization point 310-c that is configured for utilization by the UE 115 or 215. Accordingly, the UE 115 or 215 may cease uplink transmissions before the next synchronization point 310-c.
  • a UE may acquire a channel via a channel access procedure associated with the synchronization point 310-c and use the channel during a channel occupancy time 320-b that is limited by the next synchronization point 305-d in the set of synchronization points. That is, the channel occupancy time 320-b may be limited by the next synchronization point 305-d that is configured for utilization by the base station 110 or 210. In such cases, the channel occupancy time 320-b may be limited by the next synchronization point in a set that includes synchronization points 305 and 310, whether the next synchronization point 305 or 310 is usable by the same device (e.g., base station 105 or UE 115) that acquired the channel or not.
  • the same device e.g., base station 105 or UE 115
  • FIG. 4 illustrates an example of a synchronization point configuration 400 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • synchronization point configuration 400 may implement aspects of wireless communications system 100.
  • the synchronization point configuration 400 includes a set of synchronization points 405 (e.g., synchronization point 405-a, synchronization point 405-b, and synchronization point 405-c) that may be used by a base station (e.g., base station 105 of FIG. 1 or base station 210 of FIG. 2) or a UE (e.g., UE 115 of FIG. 1 or UE 215 of FIG.
  • a base station e.g., base station 105 of FIG. 1 or base station 210 of FIG. 2
  • a UE e.g., UE 115 of FIG. 1 or UE 215 of FIG.
  • the synchronization point configuration 400 also includes a set of synchronization points 410 (e.g., synchronization point 410-a, synchronization point 410-b, synchronization point 410-c, synchronization point 410-e, synchronization point 410-f, synchronization point 410-g, and synchronization point 410-h) that may be used by a base station (e.g., base station 105 of FIG. 1 or base station 210 of FIG. 2) or a UE (e.g., UE 115 of FIG. 1 or UE 215 of FIG. 2) for performing a second type of channel access procedure (e.g., a Cat-2 LBT) during a channel opportunity associated with one of the synchronization points 410.
  • a base station e.g., base station 105 of FIG. 1 or base station 210 of FIG. 2
  • a UE e.g., UE 115 of FIG. 1 or UE 215 of FIG. 2 for performing a second type of
  • a device may acquire the channel by performing a successful Cat-4 LBT channel access procedure during a channel access opportunity associated with one of the synchronization points 405 (e.g., synchronization point 405-a) corresponding to the Cat-4 LBT channel access procedure. Thereafter, the device may utilize the channel during a channel occupancy time that may be limited by the next synchronization point 405-b that is associated with the Cat-4 LBT channel access procedure.
  • a set of synchronization points 410 may be used by the other device to use the channel by performing the Cat-2 LBT during the channel occupancy time.
  • a base station may acquire the channel using a Cat-4 LBT procedure at synchronization point 405-a.
  • Synchronization points 410-a, 410-b, and 410-c may be used by a UE (e.g., UE 115 or 215) during the channel occupancy time associated with synchronization point 405-a.
  • a UE may use one of the synchronization points 410-a, 410-b and 410-c to start transmission when the UE knows that the synchronization point 410 is during a channel occupancy time.
  • a UE may acquire the channel using a Cat-4 LBT procedure at synchronization point 405-b.
  • Synchronization points 410-d, 410-e, 410-f, and 410-g may be used by a base station during the channel occupancy time after synchronization point 405-b.
  • a base station may use one of the synchronization points 410-d, 410-e, 410-f, and 410-g to start transmission when the base station knows that the synchronization point 410 is during a channel occupancy time.
  • the synchronization points may be associated with utilization by a base station, a UE, or both a base station and a UE. That is, a first subset of the Cat-4 synchronization points 405 may be used by a base station, and a second, different, subset of the Cat-4 synchronization points 405 may be used by a UE. Further, a first subset of the Cat-2 synchronization points 410 may be used by a base station, and a second, different subset of the Cat-2 synchronization points 410 may be used by a UE.
  • the time duration between synchronization point 405-a and 405-b (e.g., corresponding to a COT1) and the time duration between synchronization point 405-b and 405-c (e.g., corresponding to a COT2) may be of different time durations. Three or more different time durations may be defined by the Cat-4 LBT synchronization points. In some examples, different time durations may be configurated to allow for greater scheduling flexibility for the network operator (e.g., and the associated base stations of a single-operator network) . In some examples, different UEs may be configured to use different sets of synchronization points 405 and/or 410, for example based on a higher data load or higher QoS associated with the UE and/or data of the UE.
  • FIG. 5 illustrates an example of a process flow diagram 500 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • process flow diagram 500 may implement aspects of wireless communications system 100.
  • the process flow diagram includes base station 510 and a UE 515, which may be examples of the corresponding devices described herein.
  • the UE 115 and the base station 510 may establish a connection.
  • the base station 510 may be one of a plurality of base stations of a wireless network operating in a LBE mode.
  • the UE 515 may identify a set of synchronization points defining a plurality of different time intervals between synchronization points of the set of synchronization points.
  • the set of synchronization points may be associated with channel access opportunities during which the UE and the plurality of base stations can perform a channel access procedure to access a channel for a channel occupancy time.
  • the set of synchronization points may include a first subset of synchronization points that is usable by the base station to perform the channel access procedure and a second subset of synchronization points that is usable by the UE to perform the channel access procedure.
  • the set of synchronization points may be associated with a channel access procedure of a first type (e.g., Cat-4 LBT)
  • another set of synchronization points may be associated with a channel access procedure of a second type (e.g., Cat-2 LBT) .
  • the base station 510 may configure the set of synchronization points using configuration signaling.
  • the base station 510 may broadcast a SIB to a set of UEs including the UE 515, and the SIB may include an indication of the set of synchronization points.
  • the base station 510 may configure the set of synchronization points at the UE 515 using RRC signaling.
  • the UE may implicitly determine the synchronization points based on a uplink transmission scheduled via RRC signaling.
  • the uplink transmission may be a configured grant uplink transmission, a sounding reference signal, an uplink control channel (e.g., PUCCH) , or the like.
  • the UE 515 performs the channel access procedure at a channel access opportunity associated with one of the set of synchronization points.
  • the channel access procedure is a Cat-4 LBT procedure.
  • the UE 515 transmits, based at least in part on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • FIG. 6 shows a block diagram 600 of a device 605 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the device 605 may be an example of aspects of a UE 115 as described herein.
  • the device 605 may include a receiver 610, a communications manager 615, and a transmitter 620.
  • the device 605 may also include a one or more processors, memory coupled with the one or more processors, and instructions stored in the memory that are executable by the one or more processors to enable the one or more processors to perform the synchronization point features discussed herein.
  • Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to synchronization point design for load-based equipment mode, etc. ) . Information may be passed on to other components of the device 605.
  • the receiver 610 may be an example of aspects of the transceiver 920 described with reference to FIG. 9.
  • the receiver 610 may utilize a single antenna or a set of antennas.
  • the communications manager 615 may establish a connection with a base station of a set of base stations, identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time, perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmit, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the communications manager 615 may be an example of aspects of the communications manager 910 described herein.
  • the communications manager 615 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 615, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • code e.g., software or firmware
  • ASIC application-specific integrated circuit
  • the communications manager 615 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 615, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 615, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 620 may transmit signals generated by other components of the device 605.
  • the transmitter 620 may be collocated with a receiver 610 in a transceiver module.
  • the transmitter 620 may be an example of aspects of the transceiver 920 described with reference to FIG. 9.
  • the transmitter 620 may utilize a single antenna or a set of antennas.
  • the communications manager 615 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 610 and transmitter 620 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception over one or more bands.
  • analog components e.g., amplifiers, filters, antennas
  • the communications manager 615 as described herein may be implemented to realize one or more potential advantages.
  • One implementation may allow the device 605 to more efficiently transmit uplink communications, and more specifically to acquire a channel to transmit uplink communications.
  • the device 605 may identify a set of synchronization points for performing a channel access procedure, and transmit uplink communications on a channel based on the result of the channel access procedure.
  • a processor of a UE 115 may increase reliability and decrease signaling overhead in uplink communications based on acquiring a communication channel using the synchronization points.
  • FIG. 7 shows a block diagram 700 of a device 705 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the device 705 may be an example of aspects of a device 605, or a UE 115 as described herein.
  • the device 705 may include a receiver 710, a communications manager 715, and a transmitter 740.
  • the device 705 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 710 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to synchronization point design for load-based equipment mode, etc. ) . Information may be passed on to other components of the device 705.
  • the receiver 710 may be an example of aspects of the transceiver 920 described with reference to FIG. 9.
  • the receiver 710 may utilize a single antenna or a set of antennas.
  • the communications manager 715 may be an example of aspects of the communications manager 615 as described herein.
  • the communications manager 715 may include a connection component 720, a synchronization point identification component 725, a LBT component 730, and an uplink interface 735.
  • the communications manager 715 may be an example of aspects of the communications manager 910 described herein.
  • the connection component 720 may establish a connection with a base station of a set of base stations.
  • the synchronization point identification component 725 may identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time.
  • the LBT component 730 may perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points.
  • the uplink interface 735 may transmit, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the transmitter 740 may transmit signals generated by other components of the device 705.
  • the transmitter 740 may be collocated with a receiver 710 in a transceiver module.
  • the transmitter 740 may be an example of aspects of the transceiver 920 described with reference to FIG. 9.
  • the transmitter 740 may utilize a single antenna or a set of antennas.
  • connection component 720, the synchronization point identification component 725, the LBT component 730, and the uplink interface 735 may each be or be at least a part of a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) .
  • the processor may be coupled with memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of the connection component 720, the synchronization point identification component 725, the LBT component 730, and the uplink interface 735 discussed herein.
  • a transceiver processor may be collocated with and/or communicate with (e.g., direct the operations of) a transceiver of the device.
  • a radio processor may be collocated with and/or communicate with (e.g., direct the operations of) a radio (e.g., an NR radio, an LTE radio, a Wi-Fi radio) of the device.
  • a transmitter processor may be collocated with and/or communicate with (e.g., direct the operations of) a transmitter of the device.
  • a receiver processor may be collocated with and/or communicate with (e.g., direct the operations of) a receiver of the device.
  • FIG. 8 shows a block diagram 800 of a communications manager 805 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the communications manager 805 may be an example of aspects of a communications manager 615, a communications manager 715, or a communications manager 910 described herein.
  • the communications manager 805 may include a connection component 810, a synchronization point identification component 815, a LBT component 820, an uplink interface 825, a COT component 830, a downlink interface 835, a SIB component 840, a RRC interface 845, a QoS component 850, and a LBE component 855.
  • Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the connection component 810 may establish a connection with a base station of a set of base stations.
  • the synchronization point identification component 815 may identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time.
  • the synchronization point identification component 815 may identify that each synchronization point of the set of synchronization points is usable by the set of base stations and the UE to perform the channel access procedure.
  • the synchronization point identification component 815 may identify that a first subset of the set of synchronization points is usable by the base station to perform the channel access procedure.
  • the synchronization point identification component 815 may identify that a second subset of the set of synchronization points is usable by the UE to perform the channel access procedure, where the channel access opportunity is associated with one of the second subset of the set of synchronization points.
  • the synchronization point identification component 815 may identify a second set of synchronization points defining a second set of different time intervals between synchronization points of the second set of synchronization points, the second set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a second type of channel access procedure different from the first type of channel access procedure and during the channel occupancy time.
  • the synchronization point identification component 815 may receive, from the base station of the set of base stations, an indication of the set of synchronization points.
  • the synchronization point identification component 815 may identify the set of synchronization points based on a starting position of an uplink transmission configured via radio resource control signaling.
  • the LBT component 820 may perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points.
  • the LBT component 820 may perform the channel access procedure in accordance with a first type of channel access procedure associated with the set of synchronization points.
  • the first type of channel access procedure includes a category four listen-before-talk channel access procedure and the second type of channel access procedure includes a category two listen-before-talk channel access procedure.
  • the uplink interface 825 may transmit, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the COT component 830 may determine that transmission of the uplink signals is to end within a defined time period of the next synchronization point of a subset of the set of synchronization points that are useable by the UE to perform the channel access procedure.
  • the COT component 830 may determine, based on the determining, the channel occupancy time to end before the next synchronization point.
  • the downlink interface 835 may receive, based on a result of a channel access procedure of the second type performed by the base station, downlink signals from the base station and during the channel occupancy time.
  • the SIB component 840 may identify a system information block in a downlink shared channel transmission, the system information block including the indication of the set of synchronization points.
  • the RRC interface 845 may receive the indication via radio resource control signaling.
  • the uplink transmission includes a configured grant uplink transmission, a sounding reference signal, an uplink control channel transmission, or a combination thereof.
  • the QoS Component 850 may transmit, to the base station, an indication of an amount of data to be transmitted, a quality of service associated with the data to be transmitted, or both, where the indication of the set of synchronization points is received based on the transmitted indication.
  • the set of base stations are in a wireless network operating in a load based equipment mode.
  • connection component 810 may each be or be at least a part of a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) .
  • a processor e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor.
  • the processor may be coupled with memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of the connection component 810, synchronization point identification component 815, LBT component 820, uplink interface 825, COT component 830, downlink interface 835, SIB component 840, RRC interface 845, QoS component 850, and the LBE component 855 discussed herein.
  • FIG. 9 shows a diagram of a system 900 including a device 905 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the device 905 may be an example of or include the components of device 605, device 705, or a UE 115 as described herein.
  • the device 905 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 910, an I/O controller 915, a transceiver 920, an antenna 925, memory 930, and a processor 940. These components may be in electronic communication via one or more buses (e.g., bus 945) .
  • buses e.g., bus 945
  • the communications manager 910 may establish a connection with a base station of a set of base stations, identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time, perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmit, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the I/O controller 915 may manage input and output signals for the device 905.
  • the I/O controller 915 may also manage peripherals not integrated into the device 905.
  • the I/O controller 915 may represent a physical connection or port to an external peripheral.
  • the I/O controller 915 may utilize an operating system such as or another known operating system.
  • the I/O controller 915 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 915 may be implemented as part of a processor.
  • a user may interact with the device 905 via the I/O controller 915 or via hardware components controlled by the I/O controller 915.
  • the transceiver 920 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 920 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 920 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 925. However, in some cases the device may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 930 may include RAM and ROM.
  • the memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 930 may contain, among other things, a basic input/output system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic input/output system
  • the processor 940 may include an intelligent hardware device, (e.g., a general-purpose processor, a digital signal processor (DSP) , a CPU, a microcontroller, an ASIC, an field-programmable gate array (FPGA) , a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 940 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 940.
  • the processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting synchronization point design for load-based equipment mode) .
  • the code 935 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 935 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 935 may not be directly executable by the processor 940 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 10 shows a block diagram 1000 of a device 1005 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the device 1005 may be an example of aspects of a base station 105 as described herein.
  • the device 1005 may include a receiver 1010, a communications manager 1015, and a transmitter 1020.
  • the device 1005 may also include one or more processors, memory coupled with the one or more processors, and instructions stored in the memory that are executable by the one or more processors to enable the one or more processors to perform the synchronization point features discussed herein.
  • Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to synchronization point design for load-based equipment mode, etc. ) . Information may be passed on to other components of the device 1005.
  • the receiver 1010 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13.
  • the receiver 1010 may utilize a single antenna or a set of antennas.
  • the communications manager 1015 may establish a connection with a UE of a set of UEs, identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time, perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmit, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the communications manager 1015 may be an example of aspects of the communications manager 1310 described herein.
  • the communications manager 1015 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 1015, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC) , a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • code e.g., software or firmware
  • ASIC application-specific integrated circuit
  • the communications manager 1015 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 1015, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 1015, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 1020 may transmit signals generated by other components of the device 1005.
  • the transmitter 1020 may be collocated with a receiver 1010 in a transceiver module.
  • the transmitter 1020 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13.
  • the transmitter 1020 may utilize a single antenna or a set of antennas.
  • FIG. 11 shows a block diagram 1100 of a device 1105 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the device 1105 may be an example of aspects of a device 1005, or a base station 105 as described herein.
  • the device 1105 may include a receiver 1110, a communications manager 1115, and a transmitter 1140.
  • the device 1105 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1110 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to synchronization point design for load-based equipment mode, etc. ) . Information may be passed on to other components of the device 1105.
  • the receiver 1110 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13.
  • the receiver 1110 may utilize a single antenna or a set of antennas.
  • the communications manager 1115 may be an example of aspects of the communications manager 1015 as described herein.
  • the communications manager 1115 may include a connection component 1120, a synchronization point identification component 1125, a LBT component 1130, and a downlink interface 1135.
  • the communications manager 1115 may be an example of aspects of the communications manager 1310 described herein.
  • the connection component 1120 may establish a connection with a UE of a set of UEs.
  • the synchronization point identification component 1125 may identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time.
  • the LBT component 1130 may perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points.
  • the downlink interface 1135 may transmit, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the transmitter 1140 may transmit signals generated by other components of the device 1105.
  • the transmitter 1140 may be collocated with a receiver 1110 in a transceiver module.
  • the transmitter 1140 may be an example of aspects of the transceiver 1320 described with reference to FIG. 13.
  • the transmitter 1140 may utilize a single antenna or a set of antennas.
  • connection component 1120, the synchronization point identification component 1125, the LBT component 1130, and the downlink interface 1135 may each be or be at least a part of a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) .
  • the processor may be coupled with memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of the connection component 1120, the synchronization point identification component 1125, the LBT component 1130, and the downlink interface 1135 discussed herein.
  • a transceiver processor may be collocated with and/or communicate with (e.g., direct the operations of) a transceiver of the device.
  • a radio processor may be collocated with and/or communicate with (e.g., direct the operations of) a radio (e.g., an NR radio, an LTE radio, a Wi-Fi radio) of the device.
  • a transmitter processor may be collocated with and/or communicate with (e.g., direct the operations of) a transmitter of the device.
  • a receiver processor may be collocated with and/or communicate with (e.g., direct the operations of) a receiver of the device.
  • FIG. 12 shows a block diagram 1200 of a communications manager 1205 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the communications manager 1205 may be an example of aspects of a communications manager 1015, a communications manager 1115, or a communications manager 1310 described herein.
  • the communications manager 1205 may include a connection component 1210, a synchronization point identification component 1215, a LBT component 1220, a downlink interface 1225, a COT component 1230, an uplink interface 1235, a SIB component 1240, a RRC interface 1245, a QoS component 1250, and a LBE component 1255.
  • Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the connection component 1210 may establish a connection with a UE of a set of UEs.
  • the synchronization point identification component 1215 may identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time.
  • the synchronization point identification component 1215 may identify that each synchronization point of the set of synchronization points is usable by the set of UEs and the base station to perform the channel access procedure.
  • the synchronization point identification component 1215 may identify that a first subset of the set of synchronization points is usable by the base station to perform the channel access procedure, where the channel access opportunity is associated with one of the first subset of the set of synchronization points.
  • the synchronization point identification component 1215 may identify that a second subset of the set of synchronization points is usable by the UE to perform the channel access procedure.
  • the synchronization point identification component 1215 may identify a second set of synchronization points defining a second set of different time intervals between synchronization points of the second set of synchronization points, the second set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a second type of channel access procedure different from the first type of channel access procedure and during the channel occupancy time.
  • the synchronization point identification component 1215 may transmit, to the UE, an indication of the set of synchronization points.
  • the synchronization point identification component 1215 may transmit, to a second UE, an indication of a second set of synchronization points different from the set of synchronization points.
  • the LBT component 1220 may perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points.
  • the LBT component 1220 may perform the channel access procedure in accordance with a first type of channel access procedure associated with the set of synchronization points.
  • the first type of channel access procedure includes a category four listen-before-talk channel access procedure and the second type of channel access procedure includes a category two listen-before-talk channel access procedure.
  • the downlink interface 1225 may transmit, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the COT component 1230 may determine that transmission of the downlink signals is to end within a defined time period of the next synchronization point of a subset of the set of synchronization points that are useable by the base station to perform the channel access procedure.
  • the COT component 1230 may determine, based on the determining, the channel occupancy time to end before the next synchronization point.
  • the uplink interface 1235 may receive, based on a result of a channel access procedure of the second type performed by the UE, uplink signals from the UE during the channel occupancy time.
  • the SIB component 1240 may transmit a downlink shared channel transmission including a system information block including the indication of the set of synchronization points.
  • the RRC interface 1245 may transmit the indication via radio resource control signaling.
  • the RRC interface 1245 may transmit a radio resource control signal that indicates a starting position of an uplink transmission, where the starting position indicates the set of synchronization points.
  • the uplink transmission includes a configured grant uplink transmission, a sounding reference signal, an uplink control channel transmission, or a combination thereof.
  • the QoS Component 1250 may receive, from the UE, an indication of an amount of data to be transmitted, a quality of service associated with the data to be transmitted, or both, where the set of synchronization points is identified based on the received indication.
  • the set of UEs are in a wireless network operating in a load based equipment mode.
  • connection component 1210, the synchronization point identification component 1215, the LBT component 1220, the downlink interface 1225, the COT component 1230, the uplink interface 1235, the SIB component 1240, the RRC interface 1245, the QoS component 1250, and the LBE component 1255 may each be or be at least a part of a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) .
  • a processor e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor
  • the processor may be coupled with memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of the connection component 1210, the synchronization point identification component 1215, the LBT component 1220, the downlink interface 1225, the COT component 1230, the uplink interface 1235, the SIB component 1240, the RRC interface 1245, the QoS component 1250, and the LBE component 1255 discussed herein.
  • FIG. 13 shows a diagram of a system 1300 including a device 1305 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the device 1305 may be an example of or include the components of device 1005, device 1105, or a base station 105 as described herein.
  • the device 1305 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1310, a network communications manager 1315, a transceiver 1320, an antenna 1325, memory 1330, a processor 1340, and an inter-station communications manager 1345. These components may be in electronic communication via one or more buses (e.g., bus 1350) .
  • buses e.g., bus 1350
  • the communications manager 1310 may establish a connection with a UE of a set of UEs, identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time, perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points, and transmit, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the network communications manager 1315 may manage communications with the core network (e.g., via one or more wired backhaul links) .
  • the network communications manager 1315 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • the transceiver 1320 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 1320 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1320 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 1325. However, in some cases the device may have more than one antenna 1325, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 1330 may include RAM, ROM, or a combination thereof.
  • the memory 1330 may store computer-readable code 1335 including instructions that, when executed by a processor (e.g., the processor 1340) cause the device to perform various functions described herein.
  • a processor e.g., the processor 1340
  • the memory 1330 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the processor 1340 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 1340 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into processor 1340.
  • the processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting synchronization point design for load-based equipment mode) .
  • the inter-station communications manager 1345 may manage communications with other base station 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1345 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1345 may provide an X2 interface within an LTE/LTE-A wireless communication network technology to provide communication between base stations 105.
  • the code 1335 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 1335 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 1335 may not be directly executable by the processor 1340 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 14 shows a flowchart illustrating a method 1400 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the operations of method 1400 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1400 may be performed by a communications manager as described with reference to FIGs. 6 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may establish a connection with a base station of a set of base stations.
  • the operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed by a connection component as described with reference to FIGs. 6 through 9.
  • the UE may identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the UE and the set of base stations can perform a channel access procedure to access a channel for a channel occupancy time.
  • the operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed by a synchronization point identification component as described with reference to FIGs. 6 through 9.
  • the UE may perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points.
  • the operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed by a LBT component as described with reference to FIGs. 6 through 9.
  • the UE may transmit, based on a result of the channel access procedure, uplink signals to the base station during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the operations of 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be performed by an uplink interface as described with reference to FIGs. 6 through 9.
  • FIG. 15 shows a flowchart illustrating a method 1500 that supports synchronization point design for load-based equipment mode in accordance with aspects of the present disclosure.
  • the operations of method 1500 may be implemented by a base station 105 or its components as described herein.
  • the operations of method 1500 may be performed by a communications manager as described with reference to FIGs. 10 through 13.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.
  • the base station may establish a connection with a UE of a set of UEs.
  • the operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a connection component as described with reference to FIGs. 10 through 13.
  • the base station may identify a set of synchronization points defining a set of different time intervals between synchronization points of the set of synchronization points, the set of synchronization points associated with channel access opportunities during which the set of UEs and the base station can perform a channel access procedure to access a channel for a channel occupancy time.
  • the operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed by a synchronization point identification component as described with reference to FIGs. 10 through 13.
  • the base station may perform the channel access procedure at a channel access opportunity associated with one of the set of synchronization points.
  • the operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed by a LBT component as described with reference to FIGs. 10 through 13.
  • the base station may transmit, based on a result of the channel access procedure, downlink signals to the UE during a channel occupancy time that is to end before a next synchronization point of the set of synchronization points.
  • the operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed by a downlink interface as described with reference to FIGs. 10 through 13.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein 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 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 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 herein may 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.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special purpose computer.
  • non-transitory computer-readable media may include random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • flash memory compact disk (CD) ROM or other optical disk storage
  • CD compact disk
  • magnetic disk storage or other magnetic storage devices or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer,
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

Abstract

Procédés, systèmes et dispositifs de communication sans fil. Les techniques décrites concernent une station de base et un équipement utilisateur (UE) établissant un canal et identifiant un ensemble de points de synchronisation définissant une pluralité d'intervalles de temps différents entre des points de synchronisation de l'ensemble de points de synchronisation. L'ensemble de points de synchronisation peut être associé à des opportunités d'accès au canal pendant lesquelles l'UE et la pluralité de stations de base peuvent réaliser une procédure d'accès au canal pour accéder à un canal. La station de base ou l'UE peut réaliser la procédure d'accès au canal à une opportunité d'accès au canal associée à l'un des points de synchronisation et transmettre, sur la base, au moins en partie, d'un résultat de la procédure d'accès au canal, des signaux de liaison montante ou de liaison descendante à la station de base ou à l'UE pendant un temps d'occupation de canal qui doit se terminer avant un point de synchronisation suivant de l'ensemble de points de synchronisation.
PCT/CN2020/073231 2020-01-20 2020-01-20 Conception de point de synchronisation pour un mode d'équipement à base de charge WO2021146841A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180235006A1 (en) * 2016-12-01 2018-08-16 Telefonaktiebolaget Lm Ericsson (Publ) Method for channel access and related network node
CN110475265A (zh) * 2018-05-11 2019-11-19 电信科学技术研究院有限公司 一种数据传输、信号反馈方法及设备

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180235006A1 (en) * 2016-12-01 2018-08-16 Telefonaktiebolaget Lm Ericsson (Publ) Method for channel access and related network node
CN110475265A (zh) * 2018-05-11 2019-11-19 电信科学技术研究院有限公司 一种数据传输、信号反馈方法及设备

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
CONVIDA WIRELESS: "On Channel Access with FBE for NR Unlicensed", 3GPP TSG-RAN WG1 #99，R1-1913130, 22 November 2019 (2019-11-22), XP051823778 *
MEDIATEK INC.: "Discussion on Channel Access Procedure", 3GPP TSG RAN WG1 #97，R1-1906543, 17 May 2019 (2019-05-17), XP051708579 *
QUALCOMM INCORPORATED: "TxOP Frame Structure for NR unlicensed", 3GPP TSG RAN WG1 MEETING #94BIS，R1-1811249, 12 October 2018 (2018-10-12), XP051518652 *
SONY: "Channel access for NR unlicensed operations", 3GPP TSG RAN WG1 #98BIS，R1-1910759, 20 October 2019 (2019-10-20), XP051789548 *

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