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WO2024259547A1 - Accès multicanal dans une introduction de bandes sans licence - Google Patents

Accès multicanal dans une introduction de bandes sans licence Download PDF

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Publication number
WO2024259547A1
WO2024259547A1 PCT/CN2023/100943 CN2023100943W WO2024259547A1 WO 2024259547 A1 WO2024259547 A1 WO 2024259547A1 CN 2023100943 W CN2023100943 W CN 2023100943W WO 2024259547 A1 WO2024259547 A1 WO 2024259547A1
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WO
WIPO (PCT)
Prior art keywords
channel
channels
cot
channel access
feedback
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2023/100943
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English (en)
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WO2024259547A8 (fr
Inventor
Shaozhen GUO
Changlong Xu
Xiaoxia Zhang
Jing Sun
Chih-Hao Liu
Giovanni Chisci
Luanxia YANG
Siyi Chen
Hao Xu
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Qualcomm Inc
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Qualcomm Inc
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Publication date
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Priority to PCT/CN2023/100943 priority Critical patent/WO2024259547A1/fr
Publication of WO2024259547A1 publication Critical patent/WO2024259547A1/fr
Publication of WO2024259547A8 publication Critical patent/WO2024259547A8/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for multi-channel access in unlicensed bands.
  • Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, or other similar types of services. These wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available wireless communications system resources with those users
  • wireless communications systems have made great technological advancements over many years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Accordingly, there is a continuous desire to improve the technical performance of wireless communications systems, including, for example: improving speed and data carrying capacity of communications, improving efficiency of the use of shared communications mediums, reducing power used by transmitters and receivers while performing communications, improving reliability of wireless communications, avoiding redundant transmissions and/or receptions and related processing, improving the coverage area of wireless communications, increasing the number and types of devices that can access wireless communications systems, increasing the ability for different types of devices to intercommunicate, increasing the number and type of wireless communications mediums available for use, and the like. Consequently, there exists a need for further improvements in wireless communications systems to overcome the aforementioned technical challenges and others.
  • One aspect provides a method for wireless communications by an apparatus.
  • the method includes receiving first channel occupancy time (COT) sharing information for a first shared COT for a first channel of a plurality of channels; and during the first shared COT, initiating performing multi-channel access on the plurality of channels, including the first channel, to acquire a corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels.
  • COT channel occupancy time
  • the method includes initiating performing multi-channel access on a plurality of channels to acquire a corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels; after initiating performing the multi-channel access, and while performing the multi-channel access, receiving first COT sharing information for a first shared COT for a first channel of the plurality of channels; and after receiving the first COT sharing information and during at least the first shared COT, one of: continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels; or continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using a channel access type associated with the first shared COT
  • one or more apparatuses operable, configured, or otherwise adapted to perform any portion of any method described herein (e.g., such that performance may be by only one apparatus or in a distributed fashion across multiple apparatuses) ; one or more non-transitory, computer-readable media comprising instructions that, when executed by one or more processors of one or more apparatuses, cause the one or more apparatuses to perform any portion of any method described herein (e.g., such that instructions may be included in only one computer-readable medium or in a distributed fashion across multiple computer-readable media, such that instructions may be executed by only one processor or by multiple processors in a distributed fashion, such that each apparatus of the one or more apparatuses may include one processor or multiple processors, and/or such that performance may be by only one apparatus or in a distributed fashion across multiple apparatuses) ; one or more computer program products embodied on one or more computer-readable storage media comprising code for performing any portion of any method described herein (e.g., such that code may be stored in only
  • FIG. 1 depicts an example wireless communications network.
  • FIG. 2 depicts an example disaggregated base station architecture.
  • FIG. 3 depicts aspects of an example base station and an example user equipment (UE) .
  • UE user equipment
  • FIGS. 4A, 4B, 4C, and 4D depict various example aspects of data structures for a wireless communications network.
  • FIG. 5 depicts a timeline for communication on multiple channels of an unlicensed spectrum.
  • FIG. 6 depicts a timeline for communication on multiple channels of an unlicensed spectrum.
  • FIG. 7 depicts a method for wireless communications.
  • FIG. 10 depicts aspects of an example communications device.
  • aspects of the present disclosure provide apparatuses, methods, processing systems, and computer-readable mediums for multi-channel access in unlicensed bands.
  • Certain wireless communications devices may be capable of communicating in unlicensed frequency spectrum (also referred to as shared spectrum) , such as on one or more unlicensed frequency bands (referred to as unlicensed bands or unlicensed channels) .
  • unlicensed frequency spectrum may be divided into one or more unlicensed bands, such as having a bandwidth of 20 MHz each.
  • wireless communication devices may communicate with participation of a base station, such as based on 5G New Radio Unlicensed (NR-U) mode of operation, or directly without participation of a base station, such as based on sidelink on unlicensed band (SL-U) mode of operation.
  • Unlicensed spectrum refers to a part of the electromagnetic spectrum that can be assigned or shared by devices for non-exclusive usage, while licensed spectrum is a part of the electromagnetic spectrum assigned exclusively to mobile network operators.
  • channel access In unlicensed spectrum, channel access is not guaranteed, meaning access to an unlicensed frequency band is not guaranteed.
  • wireless communications devices are required to contend for channel access in the spectrum, for example, via clear channel assessment (CCA) and/or listen-before-talk (LBT) procedures.
  • CCA clear channel assessment
  • LBT listen-before-talk
  • the wireless communications device may perform LBT on the one or more unlicensed bands to ensure the one or more unlicensed bands are idle (not in use by another wireless communications device) .
  • each unlicensed band may also be referred to as an LBT band.
  • the LBT procedure helps avoid interference between devices.
  • An LBT can be based on energy detection (ED) or signal detection.
  • ED energy detection
  • the LBT results in a pass (meaning the unlicensed band is idle) when signal energy measured from the channel (e.g., unlicensed band) is below a threshold.
  • the LBT results in a failure (meaning the unlicensed band is occupied) when signal energy measured from the channel exceeds the threshold.
  • a channel reservation signal e.g., a predetermined preamble signal
  • the wireless communications device When the LBT results in a pass for an unlicensed band, the wireless communications device is able to transmit on the unlicensed band. In particular, when the LBT results in a pass, the wireless communications device acquires a channel occupancy time (COT) in the unlicensed band.
  • COT channel occupancy time
  • a COT is a duration during which the wireless communications device can transmit in the unlicensed band.
  • the COT indicates an amount of time, such as a maximum amount of time, a device may occupy a channel (the unlicensed band) for a given transmission burst.
  • the COT may be 4 ms or 10 ms, depending on the region. In some implementations, multiple UEs may share a COT.
  • the multiple UEs may share an unlicensed band for sidelink transmission and share a maximum amount of time.
  • at least one wireless communication device transmits at least one signal in at least a portion of the unlicensed band (e.g., in one or more resource blocks (RBs) of a plurality of RBs of the unlicensed band) during the COT.
  • RBs resource blocks
  • a device that acquired the COT may send COT sharing information (also referred to as COT sharing configuration) to the other device.
  • COT sharing configuration also referred to as COT sharing configuration
  • the COT sharing information may include a time duration of the COT, an indication of the frequency of the unlicensed band (e.g., an indication of an RB set corresponding to the unlicensed band) , an indication of a type of channel access to perform in the COT (also referred to as a type of channel access associated with the COT, such as Type-1, Type-2A, Type-2B, Type-2C, etc. ) , and/or the like.
  • an indication of the frequency of the unlicensed band e.g., an indication of an RB set corresponding to the unlicensed band
  • an indication of a type of channel access to perform in the COT also referred to as a type of channel access associated with the COT, such as Type-1, Type-2A, Type-2B, Type-2C, etc.
  • the term “initiating UE” can refer to a user equipment device initiating or acquiring a COT in an unlicensed radio frequency band for sidelink communication. Upon passing the LBT (indicating the channel is clear for transmission) , the initiating UE may transmit a sidelink transmission during the acquired COT.
  • the term “responding UE” can refer to a user equipment device responding to a sidelink transmission transmitted by any initiating UE. A sidelink UE may operate as an initiating UE at one time and operate as a responding UE at another time.
  • Type-1 channel access refers to a type of channel access where the wireless communications device performs channel sensing (e.g., LBT) for a randomly selected duration (i.e., amount of time) on the channel in order to access the channel. For example, the wireless communications device may select a random time (e.g., from a set of defined times, within a range of times, etc.
  • channel sensing e.g., LBT
  • a randomly selected duration i.e., amount of time
  • the wireless communications device may select a random time (e.g., from a set of defined times, within a range of times, etc.
  • Type-1 channel access is used by a wireless communications device to acquire a COT for the channel.
  • Type-2 channel access refers to a type of channel access where the wireless communications device performs channel sensing (e.g., LBT) for a fixed duration to attempt to access the channel.
  • channel sensing e.g., LBT
  • Type-2A channel access has a fixed duration of 25 ⁇ s.
  • Type-2B channel access has a fixed duration of 16 ⁇ s.
  • Type-2C channel access has a fixed duration of 0 ⁇ s, meaning no channel sensing is performed and the wireless communications device accesses the channel without performing channel sensing.
  • Type-2 channel access herein may refer to one or more of Type-2A, Type-2B, and Type-2C channel access.
  • Type-2 channel access is used by a wireless communications device to use a shared COT on a channel.
  • a wireless communications device may receive COT sharing information for a shared COT on a channel from another wireless communications device.
  • the wireless communications device may perform Type-2 channel access, such as a type of Type-2 channel access indicated in the COT sharing information.
  • a wireless communications device may perform multi-channel access to transmit on a plurality of channels (e.g., a plurality of unlicensed bands) .
  • a plurality of channels e.g., a plurality of unlicensed bands
  • the wireless communications device performs Type-1 channel access on each of the plurality of channels in which the wireless communications device intends to transmit. For example, if the wireless communications device intends to transmit on channels A, B, and C, the wireless communications device performs Type-1 channel access on each of channels A, B, and C. In some cases, the wireless communications device selects a single random duration for performing channel sensing on the plurality of channels in which the wireless communications device intends to transmit. In some cases, the wireless communications device selects a separate random duration for performing channel sensing for each of the plurality of channels in which the wireless communications device intends to transmit.
  • the wireless communications device performs Type-1 channel access on one channel (referred to as a primary channel) of the plurality of channels in which the wireless communications device intends to transmit, and performs Type-2 (e.g., Type-2A) channel access on the remaining one or more channels (referred to as secondary channels) of the plurality of channels. For example, if the wireless communications device intends to transmit on channels A, B, and C, and channel A is selected as the primary channel, the wireless communications device performs Type-1 channel access on channel A, and Type-2 channel access on channels B and C. In certain aspects, the wireless communications device randomly selects a channel of the plurality of channels to be the primary channel for each transmission on the plurality of channels.
  • the wireless communications device does not select the same channel of the plurality of channels to be the primary channel more than once every second. In certain aspects, for the wireless communications device to access a secondary channel of the plurality of channels, the wireless communications device needs to determine the primary channel is idle when performing Type-1 channel access for the primary channel and determine the secondary channel is idle when performing Type-2 channel access for the secondary channel.
  • Type-A multi-channel access or Type-B multi-channel access may be used by a wireless communications device to transmit multiple feedback transmissions (e.g., multiple physical sidelink feedback channel (PSFCH) transmissions) on multiple channels.
  • the wireless communications device may receive transmissions (e.g., physical sidelink shared channel (PSSCH) transmissions) from multiple other wireless communications devices and accordingly transmit feedback about the transmissions to the multiple other wireless communications devices.
  • the feedback may include an acknowledgement (ACK) indicating the transmission was successfully received and decoded, or a negative ACK (NACK) indicating the transmission was not successfully received and decoded.
  • ACK acknowledgement
  • NACK negative ACK
  • a COT e.g., a shared COT acquired by another device
  • the wireless communications device when the wireless communications device has a COT for one or more channels of the plurality of channels, it may not be clear whether 1) the wireless communications device can include the one or more channels of the plurality of channels as part of the multi-channel access (e.g., Type-A or Type-B) , or 2) whether the wireless communications device can exclude the one or more channels of the plurality of channels from the multi-channel access and perform the multi-channel access on the remaining channels of the plurality of channels for which the wireless communications device does not have a COT, and for each of the one or more channels, perform the type of channel access associated with the COT of the corresponding channel (e.g., indicated in the COT sharing information for the COT.
  • the wireless communications device can include the one or more channels of the plurality of channels as part of the multi-channel access (e.g., Type-A or Type-B) , or 2) whether the wireless communications device can exclude the one or more channels of the plurality of channels from the multi-channel access and perform the multi-channel access on the remaining
  • aspects herein provide a technical solution to the technical problem by providing for what type of channel access a wireless communications device can use for the one or more channels of the plurality of channels for which the wireless communications device already has a COT.
  • latency for accessing the channel may be reduced (e.g., when Type-2 channel access is used)
  • potential for interference with other wireless communication is reduced (e.g., when Type-1 channel access is used, and/or the like for specific scenarios as further discussed herein.
  • FIG. 1 depicts an example of a wireless communications network 100, in which aspects described herein may be implemented.
  • wireless communications network 100 includes various network entities (alternatively, network elements or network nodes) .
  • a network entity is generally a communications device and/or a communications function performed by a communications device (e.g., a user equipment (UE) , a base station (BS) , a component of a BS, a server, etc. ) .
  • a communications device e.g., a user equipment (UE) , a base station (BS) , a component of a BS, a server, etc.
  • UE user equipment
  • BS base station
  • a component of a BS a component of a BS
  • server a server
  • wireless communications devices may be referred to as wireless communications devices.
  • various functions of a network as well as various devices associated with and interacting with a network may be considered network entities.
  • wireless communications network 100 includes terrestrial aspects, such as ground-based network entities (e.g., BSs 102) , and non-terrestrial aspects, such as satellite 140 and aircraft 145, which may include network entities on-board (e.g., one or more BSs) capable of communicating with other network elements (e.g., terrestrial BSs) and UEs.
  • terrestrial aspects such as ground-based network entities (e.g., BSs 102)
  • non-terrestrial aspects such as satellite 140 and aircraft 145
  • network entities on-board e.g., one or more BSs
  • other network elements e.g., terrestrial BSs
  • wireless communications network 100 includes BSs 102, UEs 104, and one or more core networks, such as an Evolved Packet Core (EPC) 160 and 5G Core (5GC) network 190, which interoperate to provide communications services over various communications links, including wired and wireless links.
  • EPC Evolved Packet Core
  • 5GC 5G Core
  • FIG. 1 depicts various example UEs 104, which may more generally include: a cellular phone, smart phone, session initiation protocol (SIP) phone, laptop, personal digital assistant (PDA) , satellite radio, global positioning system, multimedia device, video device, digital audio player, camera, game console, tablet, smart device, wearable device, vehicle, electric meter, gas pump, large or small kitchen appliance, healthcare device, implant, sensor/actuator, display, internet of things (IoT) devices, always on (AON) devices, edge processing devices, or other similar devices.
  • IoT internet of things
  • AON always on
  • edge processing devices or other similar devices.
  • UEs 104 may also be referred to more generally as a mobile device, a wireless device, a station, a mobile station, a subscriber station, a mobile subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a remote device, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, and others.
  • the BSs 102 wirelessly communicate with (e.g., transmit signals to or receive signals from) UEs 104 via communications links 120.
  • the communications links 120 between BSs 102 and UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a BS 102 and/or downlink (DL) (also referred to as forward link) transmissions from a BS 102 to a UE 104.
  • UL uplink
  • DL downlink
  • the communications links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity in various aspects.
  • MIMO multiple-input and multiple-output
  • BSs 102 may generally include: a NodeB, enhanced NodeB (eNB) , next generation enhanced NodeB (ng-eNB) , next generation NodeB (gNB or gNodeB) , access point, base transceiver station, radio base station, radio transceiver, transceiver function, transmission reception point, and/or others.
  • Each of BSs 102 may provide communications coverage for a respective coverage area 110, which may sometimes be referred to as a cell, and which may overlap in some cases (e.g., small cell 102’ may have a coverage area 110’ that overlaps the coverage area 110 of a macro cell) .
  • a BS may, for example, provide communications coverage for a macro cell (covering relatively large geographic area) , a pico cell (covering relatively smaller geographic area, such as a sports stadium) , a femto cell (relatively smaller geographic area (e.g., a home) ) , and/or other types of cells.
  • BSs 102 are depicted in various aspects as unitary communications devices, BSs 102 may be implemented in various configurations.
  • one or more components of a base station may be disaggregated, including a central unit (CU) , one or more distributed units (DUs) , one or more radio units (RUs) , a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) , or a Non-Real Time (Non-RT) RIC, to name a few examples.
  • CU central unit
  • DUs distributed units
  • RUs radio units
  • RIC Near-Real Time
  • Non-RT Non-Real Time
  • a base station may be virtualized.
  • a base station e.g., BS 102
  • BS 102 may include components that are located at a single physical location or components located at various physical locations.
  • a base station includes components that are located at various physical locations
  • the various components may each perform functions such that, collectively, the various components achieve functionality that is similar to a base station that is located at a single physical location.
  • a base station including components that are located at various physical locations may be referred to as a disaggregated radio access network architecture, such as an Open RAN (O-RAN) or Virtualized RAN (VRAN) architecture.
  • FIG. 2 depicts and describes an example disaggregated base station architecture.
  • Different BSs 102 within wireless communications network 100 may also be configured to support different radio access technologies, such as 3G, 4G, and/or 5G.
  • BSs 102 configured for 4G LTE may interface with the EPC 160 through first backhaul links 132 (e.g., an S1 interface) .
  • BSs 102 configured for 5G e.g., 5G NR or Next Generation RAN (NG-RAN)
  • 5G e.g., 5G NR or Next Generation RAN (NG-RAN)
  • BSs 102 may communicate directly or indirectly (e.g., through the EPC 160 or 5GC 190) with each other over third backhaul links 134 (e.g., X2 interface) , which may be wired or wireless.
  • third backhaul links 134 e.g., X2 interface
  • Wireless communications network 100 may subdivide the electromagnetic spectrum into various classes, bands, channels, or other features. In some aspects, the subdivision is provided based on wavelength and frequency, where frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, or a subband.
  • frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, or a subband.
  • 3GPP currently defines Frequency Range 1 (FR1) as including 410 MHz –7125 MHz, which is often referred to (interchangeably) as “Sub-6 GHz” .
  • FR2 Frequency Range 2
  • FR2 includes 24, 250 MHz –52, 600 MHz, which is sometimes referred to (interchangeably) as a “millimeter wave” ( “mmW” or “mmWave” ) .
  • a base station configured to communicate using mmWave/near mmWave radio frequency bands may utilize beamforming (e.g., 182) with a UE (e.g., 104) to improve path loss and range.
  • beamforming e.g., 182
  • UE e.g., 104
  • the communications links 120 between BSs 102 and, for example, UEs 104 may be through one or more carriers, which may have different bandwidths (e.g., 5, 10, 15, 20, 100, 400, and/or other MHz) , and which may be aggregated in various aspects. Carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL) .
  • BS 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming.
  • BS 180 may transmit a beamformed signal to UE 104 in one or more transmit directions 182’ .
  • UE 104 may receive the beamformed signal from the BS 180 in one or more receive directions 182” .
  • UE 104 may also transmit a beamformed signal to the BS 180 in one or more transmit directions 182” .
  • BS 180 may also receive the beamformed signal from UE 104 in one or more receive directions 182’ .
  • BS 180 and UE 104 may then perform beam training to determine the best receive and transmit directions for each of BS 180 and UE 104.
  • the transmit and receive directions for BS 180 may or may not be the same.
  • the transmit and receive directions for UE 104 may or may not be the same.
  • Wireless communications network 100 further includes a Wi-Fi AP 150 in communication with Wi-Fi stations (STAs) 152 via communications links 154 in, for example, a 2.4 GHz and/or 5 GHz unlicensed frequency spectrum.
  • STAs Wi-Fi stations
  • D2D communications link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , a physical sidelink control channel (PSCCH) , and/or a physical sidelink feedback channel (PSFCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , a physical sidelink control channel (PSCCH) , and/or a physical sidelink feedback channel (PSFCH) .
  • PSBCH physical sidelink broadcast channel
  • PSDCH physical sidelink discovery channel
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • FCH physical sidelink feedback channel
  • sidelink communications may refer to the communications among UEs 104 without tunneling through a BS and/or a core network.
  • the PSCCH and PSSCH are analogous to a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) in downlink (DL) communication between a BS and a UE.
  • the PSCCH may carry sidelink control information (SCI) and the PSSCH may carry sidelink data (e.g., user data) .
  • SCI sidelink control information
  • PSSCH may carry sidelink data (e.g., user data) .
  • SCI sidelink control information
  • Each PSCCH is associated with a corresponding PSSCH, where SCI in a PSCCH may carry reservation and/or scheduling information for sidelink data transmission in the associated PS SCH.
  • the SCI in the PSCCH may be referred to as SCI part 1 (SCI-1)
  • additional SCI which may be referred to as SCI part 2 (SCI-2) may be carried in the PSSCH.
  • SCI-2 can include control information (e.g., transmission parameters, modulation coding scheme (MCS) ) that are more specific to the data carrier in the PSSCH.
  • MCS modulation coding scheme
  • Use cases for sidelink communication may include V2X, enhanced mobile broadband (eMBB) , industrial IoT (IIoT) , and/or NR-lite.
  • the PSFCH may be used by to transmit feedback information (e.g., acknowledgement or negative acknowledgement) , such as indicating whether data was successfully received and decoded in the PSSCH.
  • feedback information e.g., acknowledgement or negative acknowledgement
  • a first UE 104 may transmit data in a PSSCH to a second UE 104, and the second UE 104 may send corresponding feedback information to the first UE 104 in the PSFCH.
  • EPC 160 may include various functional components, including: a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and/or a Packet Data Network (PDN) Gateway 172, such as in the depicted example.
  • MME 162 may be in communication with a Home Subscriber Server (HSS) 174.
  • HSS Home Subscriber Server
  • MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • MME 162 provides bearer and connection management.
  • IP Internet protocol
  • Serving Gateway 166 which itself is connected to PDN Gateway 172.
  • PDN Gateway 172 provides UE IP address allocation as well as other functions.
  • PDN Gateway 172 and the BM-SC 170 are connected to IP Services 176, which may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a Packet Switched (PS) streaming service, and/or other IP services.
  • IMS IP Multimedia Subsystem
  • PS Packet Switched
  • BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and/or may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • MBMS Gateway 168 may be used to distribute MBMS traffic to the BSs 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and/or may be responsible for session management (start/stop) and for collecting eMBMS related charging information.
  • MMSFN Multicast Broadcast Single Frequency Network
  • 5GC 190 may include various functional components, including: an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195.
  • AMF 192 may be in communication with Unified Data Management (UDM) 196.
  • UDM Unified Data Management
  • AMF 192 is a control node that processes signaling between UEs 104 and 5GC 190.
  • AMF 192 provides, for example, quality of service (QoS) flow and session management.
  • QoS quality of service
  • IP Internet protocol
  • UPF 195 which is connected to the IP Services 197, and which provides UE IP address allocation as well as other functions for 5GC 190.
  • IP Services 197 may include, for example, the Internet, an intranet, an IMS, a PS streaming service, and/or other IP services.
  • a network entity or network node can be implemented as an aggregated base station, as a disaggregated base station, a component of a base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, to name a few examples.
  • IAB integrated access and backhaul
  • FIG. 2 depicts an example disaggregated base station 200 architecture.
  • the disaggregated base station 200 architecture may include one or more central units (CUs) 210 that can communicate directly with a core network 220 via a backhaul link, or indirectly with the core network 220 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 225 via an E2 link, or a Non-Real Time (Non-RT) RIC 215 associated with a Service Management and Orchestration (SMO) Framework 205, or both) .
  • a CU 210 may communicate with one or more distributed units (DUs) 230 via respective midhaul links, such as an F1 interface.
  • DUs distributed units
  • the DUs 230 may communicate with one or more radio units (RUs) 240 via respective fronthaul links.
  • the RUs 240 may communicate with respective UEs 104 via one or more radio frequency (RF) access links.
  • RF radio frequency
  • the UE 104 may be simultaneously served by multiple RUs 240.
  • Each of the units may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium.
  • Each of the units, or an associated processor or controller providing instructions to the communications interfaces of the units can be configured to communicate with one or more of the other units via the transmission medium.
  • the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units.
  • the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as a radio frequency (RF) transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
  • a wireless interface which may include a receiver, a transmitter or transceiver (such as a radio frequency (RF) transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
  • RF radio frequency
  • the CU 210 may host one or more higher layer control functions.
  • control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 210.
  • the CU 210 may be configured to handle user plane functionality (e.g., Central Unit –User Plane (CU-UP) ) , control plane functionality (e.g., Central Unit –Control Plane (CU-CP) ) , or a combination thereof.
  • the CU 210 can be logically split into one or more CU-UP units and one or more CU-CP units.
  • the CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration.
  • the CU 210 can be implemented to communicate with the DU 230, as necessary, for network control and signaling.
  • the DU 230 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 240.
  • the DU 230 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3 rd Generation Partnership Project (3GPP) .
  • the DU 230 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 230, or with the control functions hosted by the CU 210.
  • Lower-layer functionality can be implemented by one or more RUs 240.
  • an RU 240 controlled by a DU 230, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split.
  • the RU (s) 240 can be implemented to handle over the air (OTA) communications with one or more UEs 104.
  • OTA over the air
  • real-time and non-real-time aspects of control and user plane communications with the RU (s) 240 can be controlled by the corresponding DU 230.
  • this configuration can enable the DU (s) 230 and the CU 210 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
  • the SMO Framework 205 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements.
  • the SMO Framework 205 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (such as an O1 interface) .
  • the SMO Framework 205 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 290) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) .
  • a cloud computing platform such as an open cloud (O-Cloud) 290
  • network element life cycle management such as to instantiate virtualized network elements
  • a cloud computing platform interface such as an O2 interface
  • Such virtualized network elements can include, but are not limited to, CUs 210, DUs 230, RUs 240 and Near-RT RICs 225.
  • the SMO Framework 205 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 211, via an O1 interface. Additionally, in some implementations, the SMO Framework 205 can communicate directly with one or more RUs 240 via an O1 interface.
  • the SMO Framework 205 also may include a Non-RT RIC 215 configured to support functionality of the SMO Framework 205.
  • the Non-RT RIC 215 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence/Machine Learning (AI/ML) workflows including model training and updates, or policy-based guidance of applications/features in the Near-RT RIC 225.
  • the Non-RT RIC 215 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 225.
  • the Near-RT RIC 225 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 210, one or more DUs 230, or both, as well as an O-eNB, with the Near-RT RIC 225.
  • the Non-RT RIC 215 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 225 and may be received at the SMO Framework 205 or the Non-RT RIC 215 from non-network data sources or from network functions. In some examples, the Non-RT RIC 215 or the Near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 215 may monitor long-term trends and patterns for performance and employ AI/ML models to perform corrective actions through the SMO Framework 205 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
  • SMO Framework 205 such as reconfiguration via O1
  • A1 policies such as A1 policies
  • FIG. 3 depicts aspects of an example BS 102 and a UE 104.
  • BS 102 includes various processors (e.g., 320, 330, 338, and 340) , antennas 334a-t (collectively 334) , transceivers 332a-t (collectively 332) , which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., data source 312) and wireless reception of data (e.g., data sink 339) .
  • BS 102 may send and receive data between BS 102 and UE 104.
  • BS 102 includes controller/processor 340, which may be configured to implement various functions described herein related to wireless communications.
  • UE 104 includes various processors (e.g., 358, 364, 366, and 380) , antennas 352a-r (collectively 352) , transceivers 354a-r (collectively 354) , which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., retrieved from data source 362) and wireless reception of data (e.g., provided to data sink 360) .
  • UE 104 includes controller/processor 380, which may be configured to implement various functions described herein related to wireless communications.
  • BS 102 includes a transmit processor 320 that may receive data from a data source 312 and control information from a controller/processor 340.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) , physical downlink control channel (PDCCH) , group common PDCCH (GC PDCCH) , and/or others.
  • the data may be for the physical downlink shared channel (PDSCH) , in some examples.
  • Transmit processor 320 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Transmit processor 320 may also generate reference symbols, such as for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , PBCH demodulation reference signal (DMRS) , and channel state information reference signal (CSI-RS) .
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • DMRS PBCH demodulation reference signal
  • CSI-RS channel state information reference signal
  • Transmit (TX) multiple-input multiple-output (MIMO) processor 330 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers 332a-332t.
  • Each modulator in transceivers 332a-332t may process a respective output symbol stream to obtain an output sample stream.
  • Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from the modulators in transceivers 332a-332t may be transmitted via the antennas 334a-334t, respectively.
  • UE 104 In order to receive the downlink transmission, UE 104 includes antennas 352a-352r that may receive the downlink signals from the BS 102 and may provide received signals to the demodulators (DEMODs) in transceivers 354a-354r, respectively.
  • Each demodulator in transceivers 354a-354r may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator may further process the input samples to obtain received symbols.
  • RX MIMO detector 356 may obtain received symbols from all the demodulators in transceivers 354a-354r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • Receive processor 358 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 104 to a data sink 360, and provide decoded control information to a controller/processor 380.
  • UE 104 further includes a transmit processor 364 that may receive and process data (e.g., for the PUSCH) from a data source 362 and control information (e.g., for the physical uplink control channel (PUCCH) ) from the controller/processor 380. Transmit processor 364 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) . The symbols from the transmit processor 364 may be precoded by a TX MIMO processor 366 if applicable, further processed by the modulators in transceivers 354a-354r (e.g., for SC-FDM) , and transmitted to BS 102.
  • data e.g., for the PUSCH
  • control information e.g., for the physical uplink control channel (PUCCH)
  • Transmit processor 364 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) .
  • the symbols from the transmit processor 364 may
  • the uplink signals from UE 104 may be received by antennas 334a-t, processed by the demodulators in transceivers 332a-332t, detected by a RX MIMO detector 336 if applicable, and further processed by a receive processor 338 to obtain decoded data and control information sent by UE 104.
  • Receive processor 338 may provide the decoded data to a data sink 339 and the decoded control information to the controller/processor 340.
  • Memories 342 and 382 may store data and program codes for BS 102 and UE 104, respectively.
  • Scheduler 344 may schedule UEs for data transmission on the downlink and/or uplink.
  • BS 102 may be described as transmitting and receiving various types of data associated with the methods described herein.
  • “transmitting” may refer to various mechanisms of outputting data, such as outputting data from data source 312, scheduler 344, memory 342, transmit processor 320, controller/processor 340, TX MIMO processor 330, transceivers 332a-t, antenna 334a-t, and/or other aspects described herein.
  • “receiving” may refer to various mechanisms of obtaining data, such as obtaining data from antennas 334a-t, transceivers 332a-t, RX MIMO detector 336, controller/processor 340, receive processor 338, scheduler 344, memory 342, and/or other aspects described herein.
  • UE 104 may likewise be described as transmitting and receiving various types of data associated with the methods described herein.
  • transmitting may refer to various mechanisms of outputting data, such as outputting data from data source 362, memory 382, transmit processor 364, controller/processor 380, TX MIMO processor 366, transceivers 354a-t, antenna 352a-t, and/or other aspects described herein.
  • receiving may refer to various mechanisms of obtaining data, such as obtaining data from antennas 352a-t, transceivers 354a-t, RX MIMO detector 356, controller/processor 380, receive processor 358, memory 382, and/or other aspects described herein.
  • a processor may be configured to perform various operations, such as those associated with the methods described herein, and transmit (output) to or receive (obtain) data from another interface that is configured to transmit or receive, respectively, the data.
  • FIGS. 4A, 4B, 4C, and 4D depict aspects of data structures for a wireless communications network, such as wireless communications network 100 of FIG. 1.
  • FIG. 4A is a diagram 400 illustrating an example of a first subframe within a 5G (e.g., 5G NR) frame structure
  • FIG. 4B is a diagram 430 illustrating an example of DL channels within a 5G subframe
  • FIG. 4C is a diagram 450 illustrating an example of a second subframe within a 5G frame structure
  • FIG. 4D is a diagram 480 illustrating an example of UL channels within a 5G subframe.
  • Wireless communications systems may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink. Such systems may also support half-duplex operation using time division duplexing (TDD) .
  • OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth (e.g., as depicted in FIGS. 4B and 4D) into multiple orthogonal subcarriers. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain with OFDM and/or in the time domain with SC-FDM.
  • a wireless communications frame structure may be frequency division duplex (FDD) , in which, for a particular set of subcarriers, subframes within the set of subcarriers are dedicated for either DL or UL.
  • Wireless communications frame structures may also be time division duplex (TDD) , in which, for a particular set of subcarriers, subframes within the set of subcarriers are dedicated for both DL and UL.
  • FDD frequency division duplex
  • TDD time division duplex
  • the wireless communications frame structure is TDD where D is DL, U is UL, and X is flexible for use between DL/UL.
  • UEs may be configured with a slot format through a received slot format indicator (SFI) (dynamically through DL control information (DCI) , or semi-statically/statically through radio resource control (RRC) signaling) .
  • SFI received slot format indicator
  • DCI DL control information
  • RRC radio resource control
  • a 10 ms frame is divided into 10 equally sized 1 ms subframes.
  • Each subframe may include one or more time slots.
  • each slot may include 7 or 14 symbols, depending on the slot format.
  • Subframes may also include mini-slots, which generally have fewer symbols than an entire slot.
  • Other wireless communications technologies may have a different frame structure and/or different channels.
  • the number of slots within a subframe is based on a slot configuration and a numerology. For example, for slot configuration 0, different numerologies ( ⁇ ) 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology ⁇ , there are 14 symbols/slot and 2 ⁇ slots/subframe.
  • the subcarrier spacing and symbol length/duration are a function of the numerology.
  • the subcarrier spacing may be equal to 2 ⁇ ⁇ 15 kHz, where ⁇ is the numerology 0 to 5.
  • the symbol length/duration is inversely related to the subcarrier spacing.
  • the slot duration is 0.25 ms
  • the subcarrier spacing is 60 kHz
  • the symbol duration is approximately 16.67 ⁇ s.
  • a resource grid may be used to represent the frame structure.
  • Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends, for example, 12 consecutive subcarriers.
  • RB resource block
  • PRBs physical RBs
  • the resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
  • some of the REs carry reference (pilot) signals (RS) for a UE (e.g., UE 104 of FIGS. 1 and 3) .
  • the RS may include demodulation RS (DMRS) and/or channel state information reference signals (CSI-RS) for channel estimation at the UE.
  • DMRS demodulation RS
  • CSI-RS channel state information reference signals
  • the RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and/or phase tracking RS (PT-RS) .
  • BRS beam measurement RS
  • BRRS beam refinement RS
  • PT-RS phase tracking RS
  • FIG. 4B illustrates an example of various DL channels within a subframe of a frame.
  • the physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) , each CCE including, for example, nine RE groups (REGs) , each REG including, for example, four consecutive REs in an OFDM symbol.
  • CCEs control channel elements
  • REGs RE groups
  • a primary synchronization signal may be within symbol 2 of particular subframes of a frame.
  • the PSS is used by a UE (e.g., 104 of FIGS. 1 and 3) to determine subframe/symbol timing and a physical layer identity.
  • a secondary synchronization signal may be within symbol 4 of particular subframes of a frame.
  • the SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing.
  • the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DMRS.
  • the physical broadcast channel (PBCH) which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) /PBCH block.
  • the MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) .
  • the physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and/or paging messages.
  • SIBs system information blocks
  • some of the REs carry DMRS (indicated as R for one particular configuration, but other DMRS configurations are possible) for channel estimation at the base station.
  • the UE may transmit DMRS for the PUCCH and DMRS for the PUSCH.
  • the PUSCH DMRS may be transmitted, for example, in the first one or two symbols of the PUSCH.
  • the PUCCH DMRS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used.
  • UE 104 may transmit sounding reference signals (SRS) .
  • the SRS may be transmitted, for example, in the last symbol of a subframe.
  • the SRS may have a comb structure, and a UE may transmit SRS on one of the combs.
  • the SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
  • FIG. 4D illustrates an example of various UL channels within a subframe of a frame.
  • the PUCCH may be located as indicated in one configuration.
  • the PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and HARQ ACK/NACK feedback.
  • UCI uplink control information
  • the PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and/or UCI.
  • BSR buffer status report
  • PHR power headroom report
  • a wireless communications device such as UE 104 of FIGS. 1 and 3, BS 102 of FIGS. 1 and 3, or a disaggregated base station as discussed with respect to FIG. 2, may be configured to perform Type-A multi-channel access to transmit multiple feedback transmissions (e.g., multiple PSFCH transmissions) on multiple channels.
  • the wireless communications device may receive transmissions (e.g., PSSCH transmissions) from multiple other wireless communications devices and accordingly transmit feedback about the transmissions to the multiple other wireless communications devices.
  • FIG. 5 depicts a timeline 500 for communication on multiple channels (e.g., unlicensed bands) of an unlicensed spectrum. As shown, timeline 500 illustrates communications on four channels, channels 0-3. Each channel 0-3 may correspond to an RB set including a plurality of RBs. It should be noted, however, that communications may occur on fewer or additional channels. Further, timeline 500 illustrates communications across time periods 505a-505f (e.g., slots) .
  • time periods 505a-505f e.g., slots
  • a wireless communications device receives transmissions (e.g., PSSCH transmissions) , shown as transmissions 1-4, from one or more other wireless communications devices (referred to as transmission wireless communications devices) , and further transmits feedback (e.g., PSFCH transmissions) , shown as feedbacks 1-4, about the transmissions to the one or more transmission wireless communications devices.
  • transmission wireless communications devices e.g., PSSCH transmissions
  • PSFCH transmissions e.g., PSFCH transmissions
  • a first transmission wireless communications device may transmit transmission 1 in time period 505b on channel 0
  • a second transmission wireless communications device may transmit transmission 2 in time period 505c on channel 1
  • a third transmission wireless communications device may transmit transmission 3 in time period 505b on channel 2
  • a fourth transmission wireless communications device may transmit transmission 4 in time period 505a on channel 3.
  • Each transmission 1-4 may span the entire corresponding channel or a subset of the channel (e.g., a subset of RBs of an RB set) . Further, each transmission 1-4 may span the entire corresponding time period or only a portion of the time period.
  • the feedback wireless communications device is configured to transmit feedback for transmissions 1-4 on the same channel over which the transmission is received. For example, the feedback wireless communications device is configured to transmit feedback 1 for transmission 1 on channel 0, feedback 2 for transmission 2 on channel 1, feedback 3 for transmission 3 on channel 2, and feedback 4 for transmission 4 on channel 3. In certain aspects, the feedback wireless communication device may transmit feedback on a channel different from which the transmission is received. In certain aspects, as shown, the feedback wireless communications device is configured to transmit feedbacks 1-4 on channels 0-3 at the same time, in time period 505e. Each feedback 1-4 may span the entire corresponding channel or a subset of the channel (e.g., a subset of RBs of an RB set) . Further, each feedback 1-4 may span the entire time period 505e or only a portion of the time period.
  • the feedback wireless communications device to transmit feedbacks 1-4 at time period 505e, performs multi-channel access starting at time 515 prior to time period 505e. In certain aspects, the feedback wireless communications device performs Type-A multi-channel access, and accordingly is configured to perform Type-1 channel access on each of channels 0-3.
  • the fourth transmission wireless communications device may transmit COT sharing information to the feedback wireless communications device to share a COT 510 (also referred to as a shared COT) acquired for channel 3 by the fourth transmission wireless communications device.
  • the COT sharing information for COT 510 is transmitted in transmission 4.
  • the COT sharing information for COT 510 is transmitted separately form transmission 4.
  • COT 510 spans time periods 505a-505f on channel 3, such that the feedback occasion to transmit feedback 4 on channel 3 is within COT 510. Accordingly, an issue arises as to whether the feedback wireless communications device can include or exclude channel 3 as part of the Type-A multi-channel access starting at time 515 when there is already a shared COT 510 for channel 3 that spans time period 505e.
  • the issue (also referred to as scenario 1) can be framed as: when a feedback wireless communications device is to perform Type-A multi-channel access on a plurality of channels to transmit feedback on the plurality of channels, and when for each of one or more channels of the plurality of channels the feedback wireless communications device receives COT sharing information for a COT for the channel that spans a time period for transmitting the feedback (such that the occasion for transmitting the feedback is in a shared COT) , can the feedback wireless communications device include the one or more channels as part of the Type-A multi-channel access, or can the feedback wireless communications device exclude the one or more channels from the Type-A multi-channel access.
  • the feedback wireless communications device when the one or more channels are included as part of the Type-A multi-channel access, performs Type-1 channel access on each of the plurality of channels to acquire a new COT for each of the plurality of channels (e.g., and ignores the shared COT (s) on the one or more channels, such as not performing the type of channel access associated with the shared COT (s) ) .
  • the feedback wireless communications device when the one or more channels are excluded as part of the Type-A multi-channel access, performs Type-A multi-channel access on the plurality of channels other than the one or more channels. Accordingly, the feedback wireless communications device performs Type-1 channel access on each of the plurality of channels other than the one or more channels to acquire a new COT for each of the plurality of channels other than the one or more channels. Further, for each of the one or more channels, the feedback wireless communications device performs the type of channel access associated with the shared COT for the channel.
  • the feedback wireless communications device performs a type of channel access associated with shared COT A for channel A, and a type of channel access associated with shared COT B for channel B.
  • the feedback wireless communications device may be configured to include the one or more channels as part of the Type-A multi-channel access for scenario 1. Accordingly, the feedback wireless communications device uses Type-1 channel access on all of the plurality of channels to acquire a new COT for each of the plurality of channels. For example, for timeline 500, the feedback wireless communications device performs Type-A multi-channel access on all of channels 0-3 starting at time 515, and therefore uses Type-1 channel access for each of channels 0-3, including performing Type-1 channel access on channel 3 during COT 510. In certain aspects, feedback wireless communications device ignores COT 510, and does not use COT 510 to communicate on channel 3.
  • the feedback wireless communications device does not necessarily perform a type of channel access associated with COT 510 during COT 510, and instead acquires a new COT for channel 3. This may provide the technical effect of reducing potential interference by the feedback wireless communications device with other devices on channel 3.
  • the feedback wireless communications device may be configured to not include (i.e., exclude) the one or more channels as part of the Type-Amulti-channel access for scenario 1. Accordingly, the feedback wireless communications device uses Type-1 channel access on the plurality of channels other than the one or more channels.
  • the feedback wireless communications device performs the type of channel access (e.g., Type-2 channel access) associated with the shared COT for the channel. For example, for timeline 500, the feedback wireless communications device uses Type-1 channel access for each of channels 0-2 to acquire a COT for each of channels 0-2, but uses Type-2 channel access on channel 3 during COT 510 to use COT 510 for channel 3. This may provide the technical effect of reducing channel sensing time on channel 3, thereby reducing power consumption at the feedback wireless communications device when there is already a shared COT.
  • Type-2 channel access e.g., Type-2 channel access
  • whether the feedback wireless communications device includes or excludes a given channel from the Type-A multi-channel access is based on whether the feedback wireless communications device intends to make an additional transmission (has additional data to transmit, such as a burst) on the given channel after transmitting the feedback on the given channel.
  • the feedback wireless communications device is configured to include the given channel as part of the Type-Amulti-channel access. For example, the feedback wireless communications device can then acquire a new COT to transmit the additional transmission, thereby reducing interference when making the additional transmission.
  • the feedback wireless communications device excludes the given channel from the Type-Amulti-channel access, and in some cases, instead performs a type of multi-channel access (e.g., Type-2 channel access) associated with the shared COT on the given channel.
  • a type of multi-channel access e.g., Type-2 channel access
  • the feedback wireless communications device when the feedback wireless communications device has data to transmit in channel 3, after transmitting feedback 4, such as data to transmit in time period 505f, the feedback wireless communications device performs Type-A multi-channel access on all of channels 0-3, including channel 3, starting at time 515. This may provide the technical effect of reducing potential interference by the feedback wireless communications device with other devices on channel 3, especially when the feedback wireless communications device is transmitting additional data that has an additional chance of causing interference.
  • the feedback wireless communications device when the feedback wireless communications device does not have data to transmit in channel 3 after transmitting feedback 4, the feedback wireless communications device performs Type-A multi-channel access on channel 0-2 and excludes channel 3 from the Type-A multi-channel access starting at time 515. Further, the feedback wireless communications device performs a type of channel access (e.g., Type-2 channel access) associated with COT 510 on channel 3. This may provide the technical effect of reducing channel sensing time on channel 3 when only feedback is to be transmitted, which has a reduced chance of causing interference, thereby reducing power consumption at the feedback wireless communications device when there is already a shared COT and higher probability for successful channel sensing.
  • a type of channel access e.g., Type-2 channel access
  • whether the feedback wireless communications device includes or excludes a given channel from the Type-A multi-channel access is based on whether the feedback wireless communications device receives an indication to enable Type-1 channel access for the given channel (e.g., during the shared COT for the given channel) , such as for transmission of feedback on the given channel.
  • the indication may indicate which type of channel access to use (e.g., Type-1, Type-2A, Type-2B, Type-2C, etc. ) for transmission of feedback on the given channel, and the feedback wireless communications device uses the indicated type of channel access.
  • an indication is received to use Type-1 channel access for a given channel, the given channel is included as part of the Type-A multi-channel access, and Type-1 channel access is used, and if no indication is received, the given channel is excluded from the Type-A multi-channel access, and a type of channel access (e.g., Type-2 channel access) associated with the shared COT on the given channel is used for the given channel during the shared COT for the given channel.
  • a single indication is received for all of the one or more channels.
  • separate indications are received for each of the one or more channels. This may provide the technical effect of flexibility as to whether Type-1 channel access or Type-2 channel access is used, such as depending on channel conditions.
  • the indication (s) may be received by the feedback wireless communications device from one or more of the transmission wireless communications devices, from another device, etc.
  • the indication (s) are included in one or more of the transmissions 1-4.
  • the indication (s) are transmitted separately from the one or more of the transmissions 1-4.
  • the feedback wireless communications device when the feedback wireless communications device receives an indication enabling Type-1 channel access for channel 3, such as during COT 510, the feedback wireless communications device performs Type-A multi-channel access on all of channels 0-3, including channel 3, starting at time 515.
  • the feedback wireless communications device when the feedback wireless communications device does not receive an indication enabling Type-1 channel access for channel 3 during COT 510, the feedback wireless communications device performs Type-A multi-channel access on channel 0-2 and excludes channel 3 from the Type-A multi-channel access starting at time 515. Further, the feedback wireless communications device performs a type of channel access (e.g., Type-2 channel access) associated with COT 510 on channel 3.
  • a type of channel access e.g., Type-2 channel access
  • a wireless communications device such as UE 104 of FIGS. 1 and 3, BS 102 of FIGS. 1 and 3, or a disaggregated base station as discussed with respect to FIG. 2, may be configured to perform Type-A multi-channel access to transmit multiple feedback transmissions (e.g., multiple PSFCH transmissions) on multiple channels.
  • the wireless communications device may receive transmissions (e.g., PSSCH transmissions) from multiple other wireless communications devices and accordingly transmit feedback about the transmissions to the multiple other wireless communications devices.
  • FIG. 6 depicts a timeline 600 for communication on multiple channels (e.g., unlicensed bands) of an unlicensed spectrum.
  • timeline 600 is similar to timeline 500 of FIG. 5 and illustrates communications on four channels, channels 0-3.
  • Each channel 0-3 may correspond to an RB set including a plurality of RBs. It should be noted, however, that communications may occur on fewer or additional channels.
  • timeline 600 illustrates communications across time periods 605a-605f (e.g., slots) , similar to time periods 505a-505f of FIG. 5.
  • Timeline 600 is the same as timeline 500 of FIG. 5, except that instead of COT 510 which spanned time periods 505a-505f on channel 3, there is COT 610 that spans time periods 605d-605f on channel 3.
  • the feedback wireless communications device additionally receives a transmission 5 (e.g., PSSCH transmission) (e.g., from a fifth transmission wireless communications device) on channel 3 at time period 605d, and further transmits feedback 5 (e.g., PSFCH transmission) for transmission 5 on channel 3 at time period 605e.
  • a transmission 5 e.g., PSSCH transmission
  • feedback 5 e.g., PSFCH transmission
  • the feedback wireless communications device to transmit feedbacks 1-5 at time period 605e, performs multi-channel access starting at time 615 prior to time period 605e. In certain aspects, the feedback wireless communications device performs Type-A multi-channel access, and accordingly is configured to perform Type-1 channel access on each of channels 0-3.
  • the fifth transmission wireless communications device may transmit COT sharing information to the feedback wireless communications device to share the COT 610 (also referred to as a shared COT) acquired for channel 3 by the fifth transmission wireless communications device.
  • the COT sharing information for COT 610 is transmitted in transmission 5.
  • the COT sharing information for COT 610 is transmitted separately form transmission 5. As shown, COT 610 spans time periods 605d-605f on channel 3, such that the feedback occasion to transmit feedback 4 and feedback 5 on channel 3 is within COT 610.
  • the COT sharing information for COT 610 is received after time 615, meaning after the feedback wireless communications device starts/initiates performing (e.g., and is still performing) Type-A multi-channel access on channels 0-3, and begins performing Type-1 channel access on each of channels 0-3.
  • the feedback wireless communications device can continue to include or exclude channel 3 as part of the Type-A multi-channel access starting at time 615 when a shared COT 610 for channel 3 that spans time period 605e is shared after starting Type-A multi-channel access (and accordingly Type-1 channel access) on channel 3.
  • the issue (also referred to as scenario 2) can be framed as: when a feedback wireless communications device is performing Type-A multi-channel access on a plurality of channels to transmit feedback on the plurality of channels, and when for each of one or more channels of the plurality of channels the feedback wireless communications device receives, after starting to perform (and while still performing) the Type-A multi-channel access on the plurality of channels, COT sharing information for a COT for the channel (e.g., that spans a time period for transmitting the feedback (such that the occasion for transmitting the feedback is in a shared COT) ) , can the feedback wireless communications device continue to include the one or more channels as part of the Type-A multi-channel access, or can the feedback wireless communications device exclude the one or more channels from the Type-A multi-channel access.
  • COT sharing information for a COT for the channel e.g., that spans a time period for transmitting the feedback (such that the occasion for transmitting the feedback is in a shared COT)
  • the feedback wireless communications device continues to perform Type-A multi-channel access on the plurality of channels including the one or more channels and performs Type-1 channel access on each of the plurality of channels to acquire a new COT for each of the plurality of channels (e.g., and ignores the shared COT (s) on the one or more channels, such as not performing the type of channel access associated with the shared COT (s) ) .
  • the feedback wireless communications device when the one or more channels are excluded as part of the Type-A multi-channel access, continues to perform Type-A multi-channel access on the plurality of channels other than the one or more channels. Accordingly, the feedback wireless communications device performs Type-1 channel access on each of the plurality of channels other than the one or more channels to acquire a new COT for each of the plurality of channels other than the one or more channels. Further, for each of the one or more channels, the feedback wireless communications device stops performing Type-A multi-channel access (e.g., stops performing Type-1 channel access) and performs the type of channel access associated with the shared COT for the channel.
  • Type-A multi-channel access e.g., stops performing Type-1 channel access
  • the feedback wireless communications device may be configured to continue to include the one or more channels as part of the Type-A multi-channel access for scenario 2. Accordingly, the feedback wireless communications device continues to use Type-1 channel access on all of the plurality of channels to acquire a new COT for each of the plurality of channels. For example, for timeline 600, the feedback wireless communications device continues to perform Type-A multi-channel access on all of channels 0-3 after receiving COT sharing information for COT 610, and therefore continues to use Type-1 channel access for each of channels 0-3, including performing Type-1 channel access on channel 3 during COT 610. In certain aspects, feedback wireless communications device ignores COT 610, and does not use COT 610 to communicate on channel 3.
  • the feedback wireless communications device does not necessarily perform a type of channel access associated with COT 610 during COT 610, and instead acquires a new COT for channel 3. This may provide the technical effect of reducing potential interference by the feedback wireless communications device with other devices on channel 3.
  • the feedback wireless communications device may be configured to not continue to perform (e.g., stop performing) Type-A multi-channel access on the one or more channels, and instead perform the type of channel access associated with the shared COT for each of the one or more channels for scenario 2 after receiving the COT sharing information for each of the one or more channels (and while still performing multi-channel access) .
  • the feedback wireless communications device may be configured to switch (e.g., upgrade) to using Type-2 channel access instead of Type-1 channel access on the one or more channels (e.g., during the respective shared COTs) for scenario 2 after receiving the COT sharing information for each of the one or more channels (e.g., and while still performing multi-channel access) .
  • the feedback wireless communications device starts using Type-1 channel access on the plurality of channels. Further, after receiving the COT sharing information for each of the one or more channels, the feedback wireless communications device, for each of the one or more channels, performs the type of channel access (e.g., Type-2 channel access) associated with the shared COT for the channel (e.g., switches to using Type-2 channel access on the one or more channels) , while continuing to perform Type-A multi-channel access (e.g., use Type-1 channel access) on the remaining plurality of channels.
  • Type-2 channel access e.g., Type-2 channel access
  • Type-A multi-channel access e.g., use Type-1 channel access
  • the feedback wireless communications device starts performing Type-1 channel access for each of channels 0-3 at time 615 to acquire a COT for each of channels 0-3, but after receiving the COT sharing information for COT 610 on channel 3, the feedback wireless communications device switches from performing Type-1 channel access on channel 3 to acquire a new COT to instead performing a type of channel access associated with COT 610 (e.g., Type-2 channel access) on channel 3 (e.g., during COT 610) to use COT 610 for channel 3.
  • a type of channel access associated with COT 610 e.g., Type-2 channel access
  • whether the feedback wireless communications device includes or excludes a given channel from the Type-A multi-channel access after receiving COT sharing information for a shared COT for the given channel is based on whether the feedback wireless communications device intends to make an additional transmission (has additional data to transmit, such as a burst) on the given channel after transmitting the feedback on the given channel.
  • the feedback wireless communications device does intend to make an additional transmission (has additional data to transmit, such as a burst) on a given channel
  • the feedback wireless communications device is configured to continue to include the given channel as part of the Type-A multi-channel access, such as not switch and instead continue to perform Type-1 channel access on the given channel to acquire a new COT to transmit the additional transmission, thereby reducing interference when making the additional transmission.
  • the feedback wireless communications device does not intend to make an additional transmission (does not have additional data to transmit) on a given channel
  • the feedback wireless communications device is configured to not continue to perform (e.g., stop performing) Type-A multi-channel access on the given channel, and instead perform the type of channel access associated with the shared COT for the given channel, such as switch to performing Type-2 channel access on the given channel.
  • the feedback wireless communications device when the feedback wireless communications device has data to transmit in channel 3, after transmitting feedbacks 4 and 5, such as data to transmit in time period 605f, the feedback wireless communications device continues to perform Type-A multi-channel access on all of channels 0-3 after receiving COT sharing information for COT 610, and therefore continues to use Type-1 channel access for each of channels 0-3, including performing Type-1 channel access on channel 3 during COT 610.
  • feedback wireless communications device ignores COT 610, and does not use COT 610 to communicate on channel 3.
  • the feedback wireless communications device does not necessarily perform a type of channel access associated with COT 610 during COT 610, and instead acquires a new COT for channel 3. This may provide the technical effect of reducing potential interference by the feedback wireless communications device with other devices on channel 3, especially when the feedback wireless communications device is transmitting additional data that has an additional chance of causing interference.
  • the feedback wireless communications device when the feedback wireless communications device does not have data to transmit in channel 3, after transmitting feedbacks 4 and 5, the feedback wireless communications device starts performing Type-1 channel access on channel 3 starting at time 615 to acquire a COT for each of channels 0-3, but after receiving the COT sharing information for COT 610 on channel 3, the feedback wireless communications device switches to performing the type of channel access (e.g., Type-2 channel access) associated with the shared COT for COT 610 on channel 3 to use COT 610 for channel 3.
  • This may provide the technical effect of reducing channel sensing time on channel 3 when only feedback is to be transmitted, which has a reduced chance of causing interference, thereby reducing power consumption at the feedback wireless communications device when there is already a shared COT.
  • a wireless communications device such as UE 104 of FIGS. 1 and 3, BS 102 of FIGS. 1 and 3, or a disaggregated base station as discussed with respect to FIG. 2, may be configured to perform Type-B multi-channel access to transmit multiple feedback transmissions (e.g., multiple PSFCH transmissions) on multiple channels.
  • the wireless communications device may receive transmissions (e.g., PSSCH transmissions) from multiple other wireless communications devices and accordingly transmit feedback about the transmissions to the multiple other wireless communications devices.
  • the feedback wireless communications device performs Type-B multi-channel access on channels 0-3 starting at time 515 to transmit feedback on channels 0-3 at time period 505e. Accordingly, the feedback wireless communications device selects one of channels 0-3 to be the primary channel, and the remaining channels are secondary channels. The feedback wireless communications device performs Type-1 channel access on the primary channel, and Type-2 (e.g., Type-2A) channel access on the secondary channels.
  • Type-1 channel access on the primary channel and Type-2 (e.g., Type-2A) channel access on the secondary channels.
  • Type-2 e.g., Type-2A
  • the fourth transmission wireless communications device may transmit COT sharing information to the feedback wireless communications device to share COT 510 acquired for channel 3 by the fourth transmission wireless communications device. Accordingly, an issue arises as to whether the feedback wireless communications device can include or exclude channel 3 as part of the Type-B multi-channel access starting at time 515 (e.g., select channel 3 to be the primary channel for Type-B multi-channel access on channels 0-3) when there is already a shared COT 510 for channel 3 that spans time period 505e.
  • time 515 e.g., select channel 3 to be the primary channel for Type-B multi-channel access on channels 0-3
  • the issue (also referred to as scenario 3) can be framed as: when a feedback wireless communications device is to perform Type-B multi-channel access on a plurality of channels to transmit feedback on the plurality of channels, and when for each of one or more channels of the plurality of channels the feedback wireless communications device receives COT sharing information for a COT for the channel that spans a time period for transmitting the feedback (such that the occasion for transmitting the feedback is in a shared COT) , can the feedback wireless communications device include the one or more channels as part of the Type-B multi-channel access, or can the feedback wireless communications device exclude the one or more channels from the Type-B multi-channel access (e.g., can the feedback wireless communications device select any of the one or more channels to be the primary channel or can the feedback wireless communications device select the primary channel only from the plurality of channels other than the one or more channels) .
  • the feedback wireless communications device when the one or more channels are included as part of the Type-B multi-channel access, includes the one or more channels for selection as a primary channel for the Type-B multi-channel access and performs Type-1 or Type-2A channel access on each of the plurality of channels (based on whether they are a primary or secondary channel) to acquire a new COT for each of the plurality of channels (e.g., and ignores the shared COT (s) on the one or more channels, such as not performing the type of channel access associated with the shared COT (s) ) .
  • the feedback wireless communications device when the one or more channels are excluded as part of the Type-B multi-channel access, performs Type-B multi-channel access on the plurality of channels other than the one or more channels, and excludes the one or more channels for selection as a primary channel for the Type-B multi-channel access. In particular, only the plurality of channels other than the one or more channels are included for selection as a primary channel for the Type-B multi-channel access. Accordingly, the feedback wireless communications device performs Type-1 or Type-2A channel access on each of the plurality of channels other than the one or more channels (based on whether they are a primary or secondary channel) to acquire a new COT for each of the plurality of channels other than the one or more channels.
  • the feedback wireless communications device performs the type of channel access associated with the shared COT for the channel. For example, where there is a shared COT A for a channel A, and a shared COT B for a channel B, the feedback wireless communications device performs a type of channel access associated with shared COT A for channel A, and a type of channel access associated with shared COT B for channel B.
  • the feedback wireless communications device may be configured to include the one or more channels as part of the Type-B multi-channel access, such as select the primary channel from among all the plurality of channels.
  • the feedback wireless communications device performs Type-B multi-channel access on all of channels 0-3 starting at time 515, and therefore selects the primary channel from among all of channels 0-3, including channel 3 for which there is shared COT 510.
  • feedback wireless communications device ignores COT 510, and does not use COT 510 to communicate on channel 3.
  • the feedback wireless communications device does not necessarily perform a type of channel access associated with COT 510 during COT 510, and instead acquires a new COT for channel 3. Accordingly, Type-1 channel access may be performed on channel 3 for which there is shared COT 510 if channel 3 is selected as the primary channel.
  • the feedback wireless communications device may be configured to not include (i.e., exclude) the one or more channels as part of the Type-B multi-channel access (e.g., select the primary channel from among only the plurality of channels other than the one or more channels) .
  • the feedback wireless communications device performs Type-B multi-channel access on only channels 0-2 starting at time 515, and therefore selects the primary channel from among channels 0-2, but not channel 3 for which there is shared COT 510.
  • feedback wireless communications device uses a type of channel access (e.g., Type-2 channel access) associated with shared COT 510 on channel 3. Accordingly, in certain aspects, Type-1 channel access may not be performed on channel 3 for which there is shared COT 510.
  • whether or not the feedback wireless communications device includes or excludes a given channel from the Type-B multi-channel access is based on whether the feedback wireless communications device intends to make an additional transmission (has additional data to transmit, such as a burst) on the given channel after transmitting the feedback on the given channel.
  • the feedback wireless communications device does intend to make an additional transmission (has additional data to transmit, such as a burst) on a given channel
  • the feedback wireless communications device is configured to include the given channel as part of the Type-B multi-channel access (e.g., include the given channel in the set of channels from which to select the primary channel) .
  • the feedback wireless communications device can then acquire a new COT to transmit the additional transmission, thereby reducing interference when making the additional transmission.
  • the feedback wireless communications device is configured to exclude the given channel from the Type-B multi-channel access (e.g., not include the given channel in the set of channels from which to select the primary channel) .
  • the feedback wireless communications device instead performs a type of multi-channel access (e.g., Type-2 channel access) associated with the shared COT on the given channel.
  • the feedback wireless communications device when the feedback wireless communications device has data to transmit in channel 3, after transmitting feedback 4, such as data to transmit in time period 505f, the feedback wireless communications device is configured to perform Type-B multi-channel access on all of channels 0-3, including channel 3, starting at time 515 (e.g., include channel 3 in the set of channels from which to select the primary channel) .
  • This may provide the technical effect of reducing potential interference by the feedback wireless communications device with other devices on channel 3, especially when the feedback wireless communications device is transmitting additional data that has an additional chance of causing interference.
  • the feedback wireless communications device when the feedback wireless communications device does not have data to transmit in channel 3, after transmitting feedback 4, the feedback wireless communications device is configured to perform Type-B multi-channel access on channel 0-2 and exclude channel 3 from the Type-B multi-channel access starting at time 515 (e.g., not include channel 3 in the set of channels from which to select the primary channel) . Further, the feedback wireless communications device performs a type of channel access (e.g., Type-2 channel access) associated with COT 510 on channel 3. This may provide the technical effect of reducing channel sensing time on channel 3 when only feedback is to be transmitted, which has a reduced chance of causing interference, thereby reducing power consumption at the feedback wireless communications device when there is already a shared COT.
  • a type of channel access e.g., Type-2 channel access
  • whether the feedback wireless communications device includes or excludes a given channel from the Type-B multi-channel access is based on whether the feedback wireless communications device receives an indication to enable Type-1 channel access (which is used on the primary channel) for the given channel (e.g., during the shared COT for the given channel) , such as for transmission of feedback on the given channel.
  • the given channel if an indication to enable Type-1 channel access is received for a given channel, the given channel is included as part of the Type-B multi- channel access, and the feedback wireless communications device is configured to include the given channel in the set of channels from which to select the primary channel. In certain aspects, if an indication to enable Type-1 channel access is not received for a given channel, the given channel is not included as part of the Type-B multi-channel access, and the feedback wireless communications device is configured to not include the given channel in the set of channels from which to select the primary channel. Further, a type of channel access (e.g., Type-2 channel access) associated with the shared COT on the given channel is used for the given channel during the shared COT for the given channel.
  • a type of channel access e.g., Type-2 channel access
  • a single indication is received for all of the one or more channels. In certain aspects, separate indications are received for each of the one or more channels. This may provide the technical effect of flexibility as to whether Type-1 channel access or Type-2 channel access is used, such as depending on channel conditions.
  • the indication (s) may be received by the feedback wireless communications device from one or more of the transmission wireless communications devices, from another device, etc. In an example, the indication (s) are included in one or more of the transmissions 1-4. In another example, the indication (s) are transmitted separately from the one or more of the transmissions 1-4.
  • the feedback wireless communications device when the feedback wireless communications device receives an indication enabling Type-1 channel access for channel 3 during COT 510, the feedback wireless communications device is configured to perform Type-B multi-channel access on all of channels 0-3, including channel 3, starting at time 515 (e.g., include channel 3 in the set of channels from which to select the primary channel) .
  • the feedback wireless communications device when the feedback wireless communications device does not receive an indication enabling Type-1 channel access for channel 3 during COT 510, the feedback wireless communications device is configured to perform Type-B multi-channel access on channel 0-2 and exclude channel 3 from the Type-B multi-channel access starting at time 515 (e.g., not include channel 3 in the set of channels from which to select the primary channel) .
  • the feedback wireless communications device performs a type of channel access (e.g., Type-2 channel access) associated with COT 510 on channel 3.
  • a wireless communications device such as UE 104 of FIGS. 1 and 3, BS 102 of FIGS. 1 and 3, or a disaggregated base station as discussed with respect to FIG. 2, may be configured to perform Type-B multi-channel access to transmit multiple feedback transmissions (e.g., multiple PSFCH transmissions) on multiple channels.
  • the wireless communications device may receive transmissions (e.g., PSSCH transmissions) from multiple other wireless communications devices and accordingly transmit feedback about the transmissions to the multiple other wireless communications devices.
  • the feedback wireless communications device performs Type-B multi-channel access on channels 0-3 starting at time 615 to transmit feedback on channels 0-3 at time period 605e. Accordingly, the feedback wireless communications device selects one of channels 0-3 to be the primary channel, and the remaining channels are secondary channels. The feedback wireless communications device performs Type-1 channel access on the primary channel, and Type-2 (e.g., Type-2A) channel access on the secondary channels.
  • Type-1 channel access on the primary channel and Type-2 (e.g., Type-2A) channel access on the secondary channels.
  • Type-2 e.g., Type-2A
  • the fifth transmission wireless communications device may transmit COT sharing information to the feedback wireless communications device to share COT 610 acquired for channel 3 by the fifth transmission wireless communications device.
  • the COT sharing information for COT 610 is received after time 615, meaning after the feedback wireless communications device starts (e.g., and is still performing) Type-B multi-channel access on channels 0-3, and after the feedback wireless communications devices selects a primary channel among channel 0-3.
  • the feedback wireless communications device can continue to include or exclude channel 3 as part of the Type-B multi-channel access starting at time 615 (e.g., switch the type of channel access performed on channel 3) , after receiving COT sharing information for shared COT 610, to transmit feedbacks 4 and 5 at time period 605e, when shared COT 610 for channel 3 spans time period 605e and is shared after starting Type-B multi-channel access on channel 3.
  • time 615 e.g., switch the type of channel access performed on channel 3
  • the feedback wireless communications device may start performing Type-1 channel access on channel 3 at time 615 to acquire a new COT, and the issue is whether the feedback wireless communications device may switch to performing a type of channel access (e.g., Type-2 channel access) associated with shared COT 610 on channel 3 during COT 610 to use COT 610.
  • a type of channel access e.g., Type-2 channel access
  • the feedback wireless communications device may start performing Type-2A channel access on channel 3 at time 615 to acquire a new COT, and the issue is whether the feedback wireless communications device may switch to performing a type of channel access (e.g., Type-2B or Type-2C channel access) associated with shared COT 610 on channel 3 during COT 610 to use COT 610.
  • the issue (also referred to as scenario 4) can be framed as: when a feedback wireless communications device is performing Type-B multi-channel access on a plurality of channels to transmit feedback on the plurality of channels, and when for each of one or more channels of the plurality of channels the feedback wireless communications device receives, after starting to perform (and while still performing) the Type-B multi-channel access on the plurality of channels, COT sharing information for a COT for the channel (e.g., that spans a time period for transmitting the feedback (such that the occasion for transmitting the feedback is in a shared COT) ) , can the feedback wireless communications device continue to include the one or more channels as part of the Type-B multi-channel access, or can the feedback wireless communications device exclude the one or more channels from the Type-B multi-channel access.
  • COT sharing information for a COT for the channel e.g., that spans a time period for transmitting the feedback (such that the occasion for transmitting the feedback is in a shared COT)
  • the feedback wireless communications device continues to perform Type-B multi-channel access on the plurality of channels including the one or more channels and performs Type-1 or Type-2 channel access (depending on if it is a primary or secondary channel) on each of the plurality of channels to acquire a new COT for each of the plurality of channels (e.g., and ignores the shared COT (s) on the one or more channels, such as not performing the type of channel access associated with the shared COT (s) ) .
  • the feedback wireless communications device when the one or more channels are excluded as part of the Type-B multi-channel access, continues to perform Type-B multi-channel access on the plurality of channels other than the one or more channels. Accordingly, the feedback wireless communications device performs Type-1 or Type-2 channel access (depending on if it is a primary or secondary channel) on each of the plurality of channels other than the one or more channels to acquire a new COT for each of the plurality of channels other than the one or more channels. Further, for each of the one or more channels, the feedback wireless communications device stops performing Type-B multi-channel access and performs the type of channel access (e.g., Type-2A, 2B, or 2C) associated with the shared COT for the channel.
  • Type-2A, 2B, or 2C type of channel access
  • the feedback wireless communications device may be configured to continue to include the channel as part of the Type-B multi-channel access for any of the one or more channels selected as a primary channel for scenario 4.
  • the feedback wireless communications device is configured to acquire a new COT on any of the one or more channels selected as the primary channel (e.g., and not switch the type of channel access performed) .
  • the feedback wireless communications device continues to perform Type-B multi-channel access on all of channels 0-3 after receiving COT sharing information for COT 610, and therefore continues to use Type-1 channel access for channel 3, including performing Type-1 channel access on channel 3 during COT 610.
  • feedback wireless communications device ignores COT 610, and does not use COT 610 to communicate on channel 3.
  • the feedback wireless communications device does not necessarily perform a type of channel access associated with COT 610 during COT 610, and instead acquires a new COT for channel 3. This may provide the technical effect of reducing potential interference by the feedback wireless communications device with other devices on channel 3.
  • the feedback wireless communications device may be configured to continue to perform Type-B multi-channel access, such as using Type-2A channel access, for any of the one or more channels that are a secondary channel for scenario 4.
  • the one or more channels of scenario 4 that are a secondary channel may be referred to as secondary one or more channels.
  • the feedback wireless communications device is configured to acquire a new COT on any of the one or more channels selected as the secondary channel (e.g., and not switch the type of channel access performed) .
  • the feedback wireless communications device when channel 3 is a secondary channel, the feedback wireless communications device continues to perform Type-B multi-channel access on all of channels 0-3 after receiving COT sharing information for COT 610, and therefore continues to use Type-2A channel access for channel 3, including performing Type-2A channel access on channel 3 during COT 610.
  • feedback wireless communications device ignores COT 610, and does not use COT 610 to communicate on channel 3.
  • the feedback wireless communications device does not necessarily perform a type of channel access associated with COT 610 during COT 610, and instead acquires a new COT for channel 3, such as based on the COT acquired for the secondary channel. This may provide the technical effect of reducing potential interference by the feedback wireless communications device with other devices on channel 3.
  • the feedback wireless communications device can continue to transmit in a COT acquired by a Type-1 channel access in a primary channel.
  • the feedback wireless communications device may be configured to not continue to perform (e.g., stop performing) Type-B multi-channel access on the secondary one or more channels, and instead perform the type of channel access associated with the shared COT for each of the secondary one or more channels for scenario 4 after receiving the COT sharing information for each of the secondary one or more channels (e.g., and while still performing multi-channel access) .
  • the feedback wireless communications device may be configured to start performing Type-2A channel access on the secondary one or more channels and switch (e.g., upgrade) to using Type-2B or Type-2C channel access on the secondary one or more channels (e.g., during the respective shared COTs) for scenario 4 after receiving the COT sharing information for each of the secondary one or more channels (and while still performing multi-channel access) . Accordingly, the feedback wireless communications device starts using Type-2A channel access on the secondary one or more channels.
  • switch e.g., upgrade
  • Type-2B or Type-2C channel access on the secondary one or more channels e.g., during the respective shared COTs
  • the feedback wireless communications device starts using Type-2A channel access on the secondary one or more channels.
  • the feedback wireless communications device after receiving the COT sharing information for each of the secondary one or more channels, performs the type of channel access (e.g., Type-2B or 2C channel access) associated with the shared COT for the channel (e.g., switches to using Type-2B or Type-2C channel access (e.g., the same type for each channel or potentially different types for different channels) on the secondary one or more channels) .
  • type of channel access e.g., Type-2B or 2C channel access
  • the feedback wireless communications device when channel 3 is a secondary channel, the feedback wireless communications device starts performing Type-2A channel access for channel 3 at time 615 to acquire a new COT, but after receiving the COT sharing information for COT 610 on channel 3, the feedback wireless communications device switches from performing Type-2A channel access on channel 3 to performing Type-2B or Type-2C channel access on channel 3 (e.g., during COT 610) to use COT 610 for channel 3.
  • the feedback wireless communications device based on switching to using Type-2B or Type-2C channel access on a secondary channel, if the feedback wireless communications device has additional data (e.g., a burst) to transmit on the secondary channel, the feedback wireless communications device is configured to use Type-1 channel access on the secondary channel to acquire a COT to transmit the additional data.
  • the feedback wireless communications device starts performing Type-2A channel access for channel 3 at time 615, but after receiving the COT sharing information for COT 610 on channel 3, the feedback wireless communications device switches from performing Type-2A channel access on channel 3 to performing Type-2B or Type-2C channel access on channel 3 (e.g., during COT 610) to use COT 610 for channel 3.
  • the feedback wireless communications device performs Type-1 channel access on channel 3 after transmitting feedbacks 4 and 5 to acquire a COT to transmit the additional data.
  • whether the feedback wireless communications device includes or excludes a given channel from the Type-B multi-channel access e.g., switches from using Type-2A channel access on a given channel of the secondary one or more channels to using Type-2B or Type-2C channel access on the given channel
  • whether the feedback wireless communications device intends to make an additional transmission has additional data to transmit, such as a burst) on the given channel after transmitting the feedback on the given channel.
  • the feedback wireless communications device does intend to make an additional transmission (has additional data to transmit, such as a burst) on a given channel
  • the feedback wireless communications device is configured to continue to include the given channel as part of the Type-B multi-channel access, such as not switch to performing Type-2B or Type-2C channel access on the given channel and instead continue to perform Type-2A channel access to acquire a COT, thereby reducing interference when making the additional transmission.
  • the feedback wireless communications device does not intend to make an additional transmission (does not have additional data to transmit) on a given channel
  • the feedback wireless communications device is configured to not continue to perform (e.g., stop performing) Type-B multi-channel access on the given channel, and instead perform the type of channel access associated with the shared COT for the given channel, such as switch to performing Type-2B or Type-2C channel access on the given channel.
  • the feedback wireless communications device when channel 3 is a secondary channel, and when the feedback wireless communications device has data to transmit in channel 3, after transmitting feedbacks 4 and 5, such as data to transmit in time period 605f, the feedback wireless communications device continues to perform Type-B multi-channel access on all of channels 0-3 after receiving COT sharing information for COT 610, and therefore continues to use Type-1 or Type-2A channel access for each of channels 0-3, including performing Type-2A channel access on channel 3 during COT 610.
  • feedback wireless communications device ignores COT 610, and does not use COT 610 to communicate on channel 3.
  • the feedback wireless communications device does not necessarily perform a type of channel access associated with COT 610 during COT 610, and instead acquires a new COT for channel 3. This may provide the technical effect of reducing potential interference by the feedback wireless communications device with other devices on channel 3, especially when the feedback wireless communications device is transmitting additional data that has an additional chance of causing interference.
  • the feedback wireless communications device when channel 3 is a secondary channel, and when the feedback wireless communications device does not have data to transmit in channel 3, after transmitting feedbacks 4 and 5, the feedback wireless communications device starts performing Type-2A channel access on channel 3 starting at time 615 to acquire a COT for channels 3, but after receiving the COT sharing information for COT 610 on channel 3, the feedback wireless communications device switches to performing the type of channel access (e.g., Type-2B or Type-2C channel access) associated with the shared COT for COT 610 on channel 3 to use COT 610 for channel 3.
  • This may provide the technical effect of reducing channel sensing time on channel 3 when only feedback is to be transmitted, which has a reduced chance of causing interference, thereby reducing power consumption at the feedback wireless communications device when there is already a shared COT.
  • FIG. 7 shows a method 700 of wireless communications by an apparatus.
  • the apparatus is a user equipment, such as UE 104 described above with respect to FIGS. 1 and 3.
  • the apparatus is a network entity, such as BS 102 of FIGS. 1 and 3, or a disaggregated base station as discussed with respect to FIG. 2.
  • Method 700 begins at step 705 with receiving first COT sharing information for a first shared COT for a first channel of a plurality of channels.
  • Method 700 then proceeds to step 710 with, during the first shared COT, initiating performing multi-channel access on the plurality of channels, including the first channel, to acquire a corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels.
  • step 710 includes initiating performing multi-channel access on the plurality of channels during the first shared COT based on the apparatus having additional data to transmit on the first channel after transmission of feedback on the first channel.
  • method 700 further includes receiving second COT sharing information for a second shared COT for a channel of the plurality of channels.
  • method 700 further includes, during the second shared COT, initiating performing second multi-channel access on the plurality of channels, excluding the channel, to acquire a corresponding COT for each of the plurality of channels, excluding the channel, for communication of feedback on each of the plurality of channels, excluding the channel, based on the apparatus not having additional data to transmit on the channel after transmission of feedback on the channel.
  • method 700 further includes, during the second shared COT, performing channel access on the channel using a channel access type associated with the second shared COT to communicate feedback on the channel based on the apparatus not having additional data to transmit on the channel after transmission of feedback on the channel.
  • the channel access type associated with the second shared COT is Type-2 channel access.
  • method 700 further includes receiving an indication enabling Type-1 channel access for communication of feedback on the first channel during the first shared COT.
  • step 710 includes initiating performing multi-channel access on the plurality of channels during the first shared COT based on the apparatus receiving the indication.
  • method 700 further includes receiving second COT sharing information for a second shared COT for a channel of the plurality of channels.
  • method 700 further includes, during the second shared COT, initiating performing second multi-channel access on the plurality of channels, excluding the channel, to acquire a corresponding COT for each of the plurality of channels, excluding the channel, for communication of feedback on each of the plurality of channels, excluding the channel, based on the apparatus not receiving a second indication enabling Type-1 channel access for communication of feedback on the channel during the second shared COT.
  • method 700 further includes, during the second shared COT, performing channel access on the channel using a channel access type associated with the second shared COT to communicate feedback on the channel based on the apparatus not receiving the second indication enabling Type-1 channel access for communication of feedback on the channel during the second shared COT.
  • the channel access type associated with the second shared COT is Type-2 channel access.
  • the multi-channel access comprises Type-A multi-channel access.
  • the multi-channel access comprises Type-B multi-channel access.
  • method 700 may be performed by an apparatus, such as communications device 900 of FIG. 9, which includes various components operable, configured, or adapted to perform the method 700.
  • Communications device 900 is described below in further detail.
  • FIG. 7 is just one example of a method, and other methods including fewer, additional, or alternative steps are possible consistent with this disclosure.
  • FIG. 8 shows a method 800 of wireless communications by an apparatus.
  • the apparatus is a user equipment, such as UE 104 described above with respect to FIGS. 1 and 3.
  • the apparatus is a network entity, such as BS 102 of FIGS. 1 and 3, or a disaggregated base station as discussed with respect to FIG. 2.
  • Method 800 begins at step 805 with initiating performing multi-channel access on a plurality of channels to acquire a corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels.
  • Method 800 then proceeds to step 810 with, after initiating performing the multi-channel access, and while performing the multi-channel access, receiving first COT sharing information for a first shared COT for a first channel of the plurality of channels.
  • Method 800 then proceeds to step 815 with, after receiving the first COT sharing information and during at least the first shared COT, one of: continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels; or continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using a channel access type associated with the first shared COT to communicate feedback on the first channel.
  • method 800 further includes continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels.
  • method 800 further includes continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using the channel access type associated with the first shared COT to communicate feedback on the first channel.
  • method 800 further includes continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels based on the apparatus having additional data to transmit on the first channel after transmission of feedback on the first channel.
  • method 800 further includes continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using the channel access type associated with the first shared COT to communicate feedback on the first channel based on the apparatus not having additional data to transmit on the first channel after transmission of feedback on the first channel.
  • the multi-channel access comprises Type-B multi-channel access
  • method 800 further includes continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels based on the first channel being a primary channel of the multi-channel access.
  • the multi-channel access comprises Type-B multi-channel access
  • method 800 further includes continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels based on the first channel being a secondary channel of the multi-channel access.
  • the multi-channel access comprises Type-A multi-channel access.
  • the multi-channel access comprises Type-B multi-channel access.
  • step 805 includes initiating performing a first type of channel access on the first channel of the plurality of channels.
  • method 800 further includes continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using the channel access type associated with the first shared COT to communicate feedback on the first channel, wherein the channel access type associated with the first shared COT is different than the first type of channel access.
  • the first type of channel access is Type-1 channel access
  • the channel access type associated with the first shared COT is Type-2 channel access
  • the first type of channel access is Type-2A channel access
  • the channel access type associated with the first shared COT is Type-2B or Type-2C channel access.
  • method 800 further includes, after transmitting feedback on the first channel in the first shared COT, performing second channel access on the first channel using Type-1 channel access to acquire a second COT for transmitting data.
  • method 800 may be performed by an apparatus, such as communications device 1000 of FIG. 10, which includes various components operable, configured, or adapted to perform the method 800.
  • Communications device 1000 is described below in further detail.
  • FIG. 8 is just one example of a method, and other methods including fewer, additional, or alternative steps are possible consistent with this disclosure.
  • FIG. 9 depicts aspects of an example communications device 900.
  • communications device 900 is a user equipment, such as UE 104 described above with respect to FIGS. 1 and 3.
  • communications device 900 is a network entity, such as BS 102 of FIGS. 1 and 3, or a disaggregated base station as discussed with respect to FIG. 2.
  • the communications device 900 includes a processing system 905 coupled to a transceiver 955 (e.g., a transmitter and/or a receiver) and/or a network interface 965.
  • the transceiver 955 is configured to transmit and receive signals for the communications device 900 via an antenna 960, such as the various signals as described herein.
  • the network interface 965 is configured to obtain and send signals for the communications device 900 via communications link (s) , such as a backhaul link, midhaul link, and/or fronthaul link as described herein, such as with respect to FIG. 2.
  • the processing system 905 may be configured to perform processing functions for the communications device 900, including processing signals received and/or to be transmitted by the communications device 900.
  • the processing system 905 includes one or more processors 910.
  • the one or more processors 910 may be representative of one or more of receive processor 338, receive processor 358, transmit processor 320, transmit processor 364, TX MIMO processor 330, TX MIMO processor 366, controller/processor 340, and/or controller/processor 380, as described with respect to FIG. 3.
  • the one or more processors 910 are coupled to a computer-readable medium/memory 930 via a bus 950.
  • the computer-readable medium/memory 930 is configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors 910, enable and cause the one or more processors 910 to perform the method 700 described with respect to FIG.
  • references to a processor performing a function of communications device 900 may include one or more processors performing that function of communications device 900, such as in a distributed fashion.
  • computer-readable medium/memory 930 stores code for receiving 935, code for initiating 940, and code for performing 945. Processing of the code 935-945 may enable and cause the communications device 900 to perform the method 700 described with respect to FIG. 7, or any aspect related to it; and the method 800 described with respect to FIG. 8, or any aspect related to it.
  • the one or more processors 910 include circuitry configured to implement (e.g., execute) the code stored in the computer-readable medium/memory 930, including circuitry for receiving 915, circuitry for initiating 920, and circuitry for performing 925. Processing with circuitry 915-925 may enable and cause the communications device 900 to perform the method 700 described with respect to FIG. 7, or any aspect related to it; and the method 800 described with respect to FIG. 8, or any aspect related to it.
  • means for communicating, transmitting, sending or outputting for transmission may include: the transceivers 354, antenna (s) 352, transmit processor 364, TX MIMO processor 366, and/or controller/processor 380 of the UE 104 illustrated in FIG. 3; the transceivers 332, antenna (s) 334, transmit processor 320, TX MIMO processor 330, and/or controller/processor 340 of the BS 102 illustrated in FIG. 3; and transceiver 955 and/or antenna 960 of the communications device 900 in FIG. 9, and/or one or more processors 910 of the communications device 900 in FIG. 9.
  • Means for communicating, receiving or obtaining may include: the transceivers 354, antenna (s) 352, receive processor 358, and/or controller/processor 380 of the UE 104 illustrated in FIG. 3; the transceivers 332, antenna (s) 334, receive processor 338, and/or controller/processor 340 of the BS 102 illustrated in FIG. 3; and transceiver 955 and/or antenna 960 of the communications device 900 in FIG. 9, and/or one or more processors 904 of the communications device 900 in FIG. 9.
  • FIG. 10 depicts aspects of an example communications device 1000.
  • communications device 1000 is a user equipment, such as UE 104 described above with respect to FIGS. 1 and 3.
  • communications device 1000 is a network entity, such as BS 102 of FIGS. 1 and 3, or a disaggregated base station as discussed with respect to FIG. 2.
  • the communications device 1000 includes a processing system 1005 coupled to a transceiver 1065 (e.g., a transmitter and/or a receiver) and/or a network interface 1075.
  • the transceiver 1065 is configured to transmit and receive signals for the communications device 1000 via an antenna 1070, such as the various signals as described herein.
  • the network interface 1075 is configured to obtain and send signals for the communications device 1000 via communications link (s) , such as a backhaul link, midhaul link, and/or fronthaul link as described herein, such as with respect to FIG. 2.
  • the processing system 1005 may be configured to perform processing functions for the communications device 1000, including processing signals received and/or to be transmitted by the communications device 1000.
  • the processing system 1005 includes one or more processors 1010.
  • the one or more processors 1010 may be representative of one or more of receive processor 338, receive processor 358, transmit processor 320, transmit processor 364, TX MIMO processor 330, TX MIMO processor 366, controller/processor 340, and/or controller/processor 380, as described with respect to FIG. 3.
  • the one or more processors 1010 are coupled to a computer-readable medium/memory 1035 via a bus 1060.
  • the computer-readable medium/memory 1035 is configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors 1010, enable and cause the one or more processors 1010 to perform the method 700 described with respect to FIG.
  • references to a processor performing a function of communications device 1000 may include one or more processors performing that function of communications device 1000, such as in a distributed fashion.
  • computer-readable medium/memory 1035 stores code for initiating 1040, code for receiving 1045, code for continuing 1050, and code for performing 1055. Processing of the code 1040-1055 may enable and cause the communications device 1000 to perform the method 700 described with respect to FIG. 7, or any aspect related to it; and the method 800 described with respect to FIG. 8, or any aspect related to it.
  • the one or more processors 1010 include circuitry configured to implement (e.g., execute) the code stored in the computer-readable medium/memory 1035, including circuitry for initiating 1015, circuitry for receiving 1020, circuitry for continuing 1025, and circuitry for performing 1030. Processing with circuitry 1015-1030 may enable and cause the communications device 1000 to perform the method 700 described with respect to FIG. 7, or any aspect related to it; and the method 800 described with respect to FIG. 8, or any aspect related to it.
  • means for communicating, transmitting, sending or outputting for transmission may include: the transceivers 354, antenna (s) 352, transmit processor 364, TX MIMO processor 366, and/or controller/processor 380 of the UE 104 illustrated in FIG. 3; the transceivers 332, antenna (s) 334, transmit processor 320, TX MIMO processor 330, and/or controller/processor 340 of the BS 102 illustrated in FIG. 3; and transceiver 1065 and/or antenna 1070 of the communications device 1000 in FIG. 10, and/or one or more processors 1010 of the communications device 1000 in FIG. 10.
  • Means for communicating, receiving or obtaining may include: the transceivers 354, antenna (s) 352, receive processor 358, and/or controller/processor 380 of the UE 104 illustrated in FIG. 3; the transceivers 332, antenna (s) 334, receive processor 338, and/or controller/processor 340 of the BS 102 illustrated in FIG. 3; and transceiver 1065 and/or antenna 1070 of the communications device 1000 in FIG. 10, and/or one or more processors 1004 of the communications device 1000 in FIG. 10.
  • Clause 1 A method for wireless communications by an apparatus comprising: receiving first COT sharing information for a first shared COT for a first channel of a plurality of channels; and during the first shared COT, initiating performing multi-channel access on the plurality of channels, including the first channel, to acquire a corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels.
  • Clause 2 The method of Clause 1, wherein initiating performing multi-channel access on the plurality of channels during the first shared COT comprises initiating performing multi-channel access on the plurality of channels during the first shared COT based on the apparatus having additional data to transmit on the first channel after transmission of feedback on the first channel.
  • Clause 3 The method of Clause 2, further comprising: receiving second COT sharing information for a second shared COT for a channel of the plurality of channels; during the second shared COT, initiating performing second multi-channel access on the plurality of channels, excluding the channel, to acquire a corresponding COT for each of the plurality of channels, excluding the channel, for communication of feedback on each of the plurality of channels, excluding the channel, based on the apparatus not having additional data to transmit on the channel after transmission of feedback on the channel; and during the second shared COT, performing channel access on the channel using a channel access type associated with the second shared COT to communicate feedback on the channel based on the apparatus not having additional data to transmit on the channel after transmission of feedback on the channel.
  • Clause 4 The method of Clause 3, wherein the channel access type associated with the second shared COT is Type-2 channel access.
  • Clause 5 The method of any one of Clauses 1-4, further comprising: receiving an indication enabling Type-1 channel access for communication of feedback on the first channel during the first shared COT.
  • Clause 6 The method of Clause 5, wherein initiating performing multi-channel access on the plurality of channels during the first shared COT comprises initiating performing multi-channel access on the plurality of channels during the first shared COT based on the apparatus receiving the indication.
  • Clause 7 The method of Clause 5, further comprising: receiving second COT sharing information for a second shared COT for a channel of the plurality of channels; during the second shared COT, initiating performing second multi-channel access on the plurality of channels, excluding the channel, to acquire a corresponding COT for each of the plurality of channels, excluding the channel, for communication of feedback on each of the plurality of channels, excluding the channel, based on the apparatus not receiving a second indication enabling Type-1 channel access for communication of feedback on the channel during the second shared COT; and during the second shared COT, performing channel access on the channel using a channel access type associated with the second shared COT to communicate feedback on the channel based on the apparatus not receiving the second indication enabling Type-1 channel access for communication of feedback on the channel during the second shared COT.
  • Clause 8 The method of Clause 7, wherein the channel access type associated with the second shared COT is Type-2 channel access.
  • Clause 9 The method of any one of Clauses 1-8, wherein the multi-channel access comprises Type-A multi-channel access.
  • Clause 10 The method of any one of Clauses 1-8, wherein the multi-channel access comprises Type-B multi-channel access.
  • a method for wireless communications by an apparatus comprising: initiating performing multi-channel access on a plurality of channels to acquire a corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels; after initiating performing the multi-channel access, and while performing the multi-channel access, receiving first COT sharing information for a first shared COT for a first channel of the plurality of channels; and after receiving the first COT sharing information and during at least the first shared COT, one of: continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels; or continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using a channel access type associated with the first shared COT to
  • Clause 12 The method of Clause 11, wherein after receiving the first COT sharing information and during at least the first shared COT, the method further comprises continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels.
  • Clause 13 The method of Clause 11, wherein after receiving the first COT sharing information and during at least the first shared COT, the method further comprises continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using the channel access type associated with the first shared COT to communicate feedback on the first channel.
  • Clause 14 The method of Clause 11, wherein after receiving the first COT sharing information and during at least the first shared COT, the method further comprises continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels based on the apparatus having additional data to transmit on the first channel after transmission of feedback on the first channel.
  • Clause 15 The method of Clause 11, wherein after receiving the first COT sharing information and during at least the first shared COT, the method further comprises continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using the channel access type associated with the first shared COT to communicate feedback on the first channel based on the apparatus not having additional data to transmit on the first channel after transmission of feedback on the first channel.
  • Clause 16 The method of Clause 11, wherein the multi-channel access comprises Type-B multi-channel access, and wherein after receiving the first COT sharing information and during at least the first shared COT, the method further comprises continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels based on the first channel being a primary channel of the multi-channel access.
  • Clause 17 The method of Clause 11, wherein the multi-channel access comprises Type-B multi-channel access, and wherein after receiving the first COT sharing information and during at least the first shared COT, the method further comprises continuing to perform multi-channel access on the plurality of channels, including the first channel, to acquire the corresponding COT for each of the plurality of channels for communication of feedback on each of the plurality of channels based on the first channel being a secondary channel of the multi-channel access.
  • Clause 18 The method of any one of Clauses 11-17, wherein the multi-channel access comprises Type-A multi-channel access.
  • Clause 19 The method of any one of Clauses 11-17, wherein the multi-channel access comprises Type-B multi-channel access.
  • Clause 20 The method of any one of Clauses 11, 18, or 19, wherein initiating performing the multi-channel access on the plurality of channels comprises initiating performing a first type of channel access on the first channel of the plurality of channels, and wherein after receiving the first COT sharing information and during at least the first shared COT, the method further comprises continuing to perform multi-channel access on the plurality of channels, excluding the first channel, to acquire the corresponding COT for each of the plurality of channels, excluding the first channel, for communication of feedback on each of the plurality of channels, excluding the first channel, and perform channel access on the first channel using the channel access type associated with the first shared COT to communicate feedback on the first channel, wherein the channel access type associated with the first shared COT is different than the first type of channel access.
  • Clause 21 The method of Clause 20, wherein the first type of channel access is Type-1 channel access, and wherein the channel access type associated with the first shared COT is Type-2 channel access.
  • Clause 22 The method of Clause 20, wherein the first type of channel access is Type-2A channel access, and wherein the channel access type associated with the first shared COT is Type-2B or Type-2C channel access.
  • Clause 23 The method of Clause 22, further comprising, after transmitting feedback on the first channel in the first shared COT, performing second channel access on the first channel using Type-1 channel access to acquire a second COT for transmitting data.
  • Clause 24 One or more apparatuses, comprising: one or more memories comprising executable instructions; and one or more processors configured to execute the executable instructions and cause the one or more apparatuses to perform a method in accordance with any one of clauses 1-23.
  • Clause 25 One or more apparatuses, comprising means for performing a method in accordance with any one of clauses 1-23.
  • Clause 26 One or more non-transitory computer-readable media comprising executable instructions that, when executed by one or more processors of one or more apparatuses, cause the one or more apparatuses to perform a method in accordance with any one of clauses 1-23.
  • Clause 27 One or more computer program products embodied on one or more computer-readable storage media comprising code for performing a method in accordance with any one of clauses 1-23.
  • an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein.
  • the scope of the disclosure is intended to cover such an apparatus or method that is practiced using other structure, functionality, or structure and functionality in addition to, or other than, the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, a system on a chip (SoC) , or any other such configuration.
  • SoC system on a chip
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • determining encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information) , accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
  • Coupled to and “coupled with” generally encompass direct coupling and indirect coupling (e.g., including intermediary coupled aspects) unless stated otherwise. For example, stating that a processor is coupled to a memory allows for a direct coupling or a coupling via an intermediary aspect, such as a bus.
  • the methods disclosed herein comprise one or more actions for achieving the methods.
  • the method actions may be interchanged with one another without departing from the scope of the claims.
  • the order and/or use of specific actions may be modified without departing from the scope of the claims.
  • the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions.
  • the means may include various hardware and/or software component (s) and/or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor.
  • ASIC application specific integrated circuit
  • one element may perform all functions, or more than one element may collectively perform the functions.
  • each function need not be performed by each of those elements (e.g., different functions may be performed by different elements) and/or each function need not be performed in whole by only one element (e.g., different elements may perform different sub-functions of a function) .
  • one element may be configured to cause the other element to perform all functions, or more than one element may collectively be configured to cause the other element to perform the functions.

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Abstract

Certains aspects de la présente divulgation concernent des techniques de communication sans fil par un appareil. Un procédé consiste à recevoir des premières informations de partage de temps d'occupation de canal (COT) pour un premier COT partagé pour un premier canal d'une pluralité de canaux; et pendant le premier COT partagé, à initier la réalisation d'un accès multicanal sur la pluralité de canaux, comprenant le premier canal, pour acquérir un COT correspondant pour chaque canal de la pluralité de canaux pour une communication d'une rétroaction sur chaque canal de la pluralité de canaux.
PCT/CN2023/100943 2023-06-19 2023-06-19 Accès multicanal dans une introduction de bandes sans licence Pending WO2024259547A1 (fr)

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PCT/CN2023/100943 WO2024259547A1 (fr) 2023-06-19 2023-06-19 Accès multicanal dans une introduction de bandes sans licence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/100943 WO2024259547A1 (fr) 2023-06-19 2023-06-19 Accès multicanal dans une introduction de bandes sans licence

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