WO2021096960A1 - Détermination de priorités pour des canaux se chevauchant - Google Patents

Détermination de priorités pour des canaux se chevauchant Download PDF

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Publication number
WO2021096960A1
WO2021096960A1 PCT/US2020/060015 US2020060015W WO2021096960A1 WO 2021096960 A1 WO2021096960 A1 WO 2021096960A1 US 2020060015 W US2020060015 W US 2020060015W WO 2021096960 A1 WO2021096960 A1 WO 2021096960A1
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WO
WIPO (PCT)
Prior art keywords
resources
uplink
uplink channel
duration
channel
Prior art date
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PCT/US2020/060015
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English (en)
Inventor
Kapil Bhattad
Jing Sun
Xiaoxia Zhang
Pravjyot Singh DEOGUN
Original Assignee
Qualcomm Incorporated
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Publication of WO2021096960A1 publication Critical patent/WO2021096960A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0042—Arrangements for allocating sub-channels of the transmission path intra-user or intra-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation

Definitions

  • the present disclosure relates generally to wireless communications and more specifically to determining priorities for overlapping channels.
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power).
  • Examples of such multiple- access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • a wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE).
  • UE user equipment
  • Transmissions in wireless communications systems may use a cyclic prefix (CP) to provide a guard period at the start of a symbol (e.g., OFDMA symbol) which provides protection against multi-path delay spread.
  • the CP may be generated by copying the end of the main body of the symbol to a beginning of the symbol, such that a frequency domain representation of each delay spread component within a fast Fourier transform (FFT) processing window is the same.
  • FFT fast Fourier transform
  • a UE may extend a cyclic prefix to fill in gaps between communication channels.
  • the utilization of a CP extension may cause conflicts between uplink channels, such as a control channel and a shared channel. Additional and/or alternative techniques to determine whether a CP extension causes conflicts between channels may be desirable.
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support determining priorities for overlapping channels.
  • the described techniques provide for various ways that a base station and a UE may deal with identifying overlapping resources (e.g., overlapping resources of physical uplink channels, such as data channel and control channel resources) due to a cyclic prefix extension and/or a timing advance.
  • the techniques propose defining a reference duration that is compared to a gap between uplink channels. If the reference duration is greater than the gap, then the UE may determine that the uplink channels conflict (e.g., are overlapping). If there reference duration is less than the gap, then the UE may determine that there is no conflict.
  • the reference duration may be based on a default cyclic prefix extension duration, a default timing advance value, or both, and may be different than an actual cyclic prefix extension or timing advance value used by the UE. If the UE determines a conflict between the channels based on the reference duration, then the UE may transmit one of the channel based on a priority of the channels and/or message scheduled for transmission on the channels. In some cases, the UE may transmit a first message scheduled for a first uplink channel on a second uplink channel, or the UE may transmit a second uplink message scheduled for a second uplink channel on the first uplink channel in accordance with the priority.
  • a method of wireless communications at a UE may include identifying that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel, determining a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identifying a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration, and transmitting, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to identify that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel, determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration, and transmit, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the apparatus may include means for identifying that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel, determining a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identifying a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration, and transmitting, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • a non-transitory computer-readable medium storing code for wireless communications at a UE is described.
  • the code may include instructions executable by a processor to identify that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel, determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration, and transmit, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying a duration of a gap between the resources of the first uplink channel and the resources of the second uplink channel.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for comparing the reference duration with the duration of the gap between the resources of the first uplink channel and the resources of the second uplink channel, where the conflict may be identified based on the comparing.
  • the reference duration includes a maximum duration of a cyclic prefix extension that the UE may be allowed to transmit.
  • the reference duration may be zero and the conflict may be identified based at least on part on the resources of the second uplink channel overlapping with the resources of the first uplink channel.
  • transmitting one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel may include operations, features, means, or instructions for transmitting both the first uplink message and the second uplink message on the resources of the second uplink channel.
  • the first uplink message includes uplink control information.
  • transmitting one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel may include operations, features, means, or instructions for transmitting both the first uplink message and the second uplink message on the resources of the first uplink channel.
  • the second uplink message includes uplink control information.
  • transmitting one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel may include operations, features, means, or instructions for refraining from transmitting on the other one of the resources of the first uplink channel or the resources of the second uplink channel based on the priority.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving downlink control information scheduling the resources of the first uplink channel or the resources of the second uplink channel, where the downlink control information indicates the cyclic prefix extension value and the reference duration includes the cyclic prefix extension value.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a radio resource control signal including a configured grant allocating the resources of the first uplink channel, or the second uplink channel, or both, where the reference duration may be identified based on the configured grant.
  • the reference duration may be a maximum cyclic prefix extension that the UE may be allowed to transmit or zero based on the configured grant.
  • the configured grant allocates a subset of a subband for the resources of the first uplink channel or the resources of the second uplink channel, where the reference duration may be the maximum cyclic prefix extension allowed to transmit by the UE or zero based on the configured grant allocating the subset of the subband.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a duration of a cyclic prefix extension based on the configured grant allocating a full subband, where the reference duration includes the determined duration of the cyclic prefix extension.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a radio resource control signal including a first indication of the reference duration to use when the resources of the second uplink channel may be allocated via configured grant and a second indication of the reference duration to use when the resources of the second uplink channel may be scheduled according to downlink control information.
  • the reference duration may be determined based on whether a duration of a cyclic prefix extension may be determined by the UE or indicated by a base station.
  • the first uplink channel includes a first of a physical uplink control channel or a physical uplink shared channel and the second uplink channel includes a second of the physical uplink control channel or the physical uplink shared channel.
  • one of the first uplink message or the second uplink message includes a reference signal.
  • a method of wireless communications at a base station may include identifying that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel, determining a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identifying a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration, and receiving, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to identify that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel, determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration, and receive, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the apparatus may include means for identifying that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel, determining a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identifying a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration, and receiving, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • a non-transitory computer-readable medium storing code for wireless communications at a base station is described.
  • the code may include instructions executable by a processor to identify that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel, determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration, and receive, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying a duration of a gap between the resources of the first uplink channel and the resources of the second uplink channel.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for comparing the reference duration with the duration of the gap between the resources of the first uplink channel and the resources of the second uplink channel, where the conflict may be identified based on the comparing.
  • the reference duration includes a maximum duration of a cyclic prefix extension that the UE may be allowed to transmit.
  • the reference duration may be zero and the conflict may be identified based at least on part on the resources of the second uplink channel overlapping with the resources of the first uplink channel.
  • FIG. 1 illustrates an example of a system for wireless communications that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 2 illustrates an example of a wireless communications system that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 3 illustrates an example of a transmission timeline that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 4A and FIG. 4B illustrate examples of transmission timelines that support determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 5 illustrates an example of a transmission timeline that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 6 illustrates an example of a process flow diagram that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIGs. 7 and 8 show block diagrams of devices that support determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 9 shows a block diagram of a communications manager that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 10 shows a diagram of a system including a device that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIGs. 11 and 12 show block diagrams of devices that support determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 13 shows a block diagram of a communications manager that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIG. 14 shows a diagram of a system including a device that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • FIGs. 15 and 16 show flowcharts illustrating methods that support determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • Some scheduling scenarios may cause various uplink channels to overlap in time. For example, resources of a scheduled physical uplink shared channel (PUSCH) may overlap with resources of a physical uplink control channel (PUCCH).
  • a UE may be scheduled to transmit an uplink message (e.g., uplink control information (UCI)) in the PUCCH resources. If the UE detects that a PUSCH resource overlaps with a PUCCH resources, the UE may transmit the uplink message on the PUSCH resources (e.g., along with an uplink message scheduled for transmission in the PUSCH resources). In such cases, the UE may multiplex information (e.g., HARQ-ACK and/or channel state information (CSI) reports) with the messages scheduled for the PUSCH channel. Accordingly, when an overlap is detected or otherwise identified between channels, the UE may determine to transmit an uplink message scheduled for transmission in one of the overlapping channels on resources of the other overlapping channel.
  • uplink message e.g., uplink control information (UCI)
  • the UEs may be configured to use a cyclic prefix (CP) to provide a guard period at the start of a symbol (e.g., orthogonal frequency division multiplexing (OFDM) symbol) which provides protection against multi-path delay spread.
  • CP cyclic prefix
  • OFDM orthogonal frequency division multiplexing
  • the CP may be generated by copying the end of the main body of the symbol to a beginning of the symbol, such that a frequency domain representation of each delay spread component within a fast Fourier transform (FFT) processing window is the same.
  • FFT fast Fourier transform
  • a UE may use a cyclic prefix extension (CPE) duration for different scenarios (e.g., high delay spread scenarios).
  • CPE cyclic prefix extension
  • the CPE may be used to create a gap of a specific duration (e.g., 16 microseconds (ps), 25 ps, etc.) to satisfy regulatory or specification requirements on gaps between base station and UE transmissions and/or to create listen-before-talk (LBT) gaps for the UE prior to uplink (UL) transmissions.
  • a specific duration e.g. 16 microseconds (ps), 25 ps, etc.
  • the utilization a cyclic prefix extension associated with an uplink channel may overlap or conflict with another uplink channel.
  • Implementations described herein provide techniques in which the UE and/or base station may identify cases when utilization of a CP extension for an uplink channel may conflict (e.g., overlap) with another uplink channel.
  • the UE and/or base station may identify a reference duration that may be compared with a gap between two uplink channels to determine whether the uplink channels conflict.
  • the reference duration may be based on a cyclic prefix extension duration (e.g., a default duration), a timing advance (TA) value, or both, and may have a different value than the actual cyclic prefix extension duration, or the actual TA value, or both, used by the UE.
  • the UE may transmit one or more messages on one of the two uplink channels in accordance with a priority associated with the channels and/or messages.
  • the reference duration may be an agreed upon duration by the UE and the base station, such as a maximum CP extension duration and/or a minimum (e.g., zero) CP extension duration. Accordingly, both devices may be able to identify the conflict, and transmit/receive uplink messages accordingly.
  • aspects of the subject matter described herein may be implemented to realize one or more advantages.
  • the described techniques may support improvements communications in the unlicensed spectrum, decreasing signaling overhead, and improving reliability, among other advantages.
  • supported techniques may include improved network operations and, in some examples, may promote network efficiencies, among other benefits.
  • Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further described with respect to a wireless communications system, various transmission timing diagrams, and a process flow diagram. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to determining priorities for overlapping channels. [0054] FIG.
  • the wireless communications system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE- Advanced (LTE- A) network, an LTE-A Pro network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE- A LTE- Advanced
  • LTE-A Pro LTE-A Pro
  • NR New Radio
  • the wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.
  • ultra-reliable e.g., mission critical
  • the base stations 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may be devices in different forms or having different capabilities.
  • the base stations 105 and the UEs 115 may wirelessly communicate via one or more communication links 125.
  • Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base station 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a base station 105 and a UE 115 may support the communication of signals according to one or more radio access technologies.
  • the UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times.
  • the UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1.
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115, the base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in FIG. 1.
  • network equipment e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment
  • the base stations 105 may communicate with the core network 130, or with one another, or both.
  • the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via an SI, N2, N3, or other interface).
  • the base stations 105 may communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105), or indirectly (e.g., via core network 130), or both.
  • the backhaul links 120 may be or include one or more wireless links.
  • One or more of the base stations 105 described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next- generation NodeB or a giga-NodeB (either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC machine type communications
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • devices such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • the UEs 115 and the base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers.
  • the term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links 125.
  • a carrier used for a communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR).
  • BWP bandwidth part
  • Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling.
  • the wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • a carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be positioned according to a channel raster for discovery by the UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • a carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non- standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology).
  • the communication links 125 shown in the wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115.
  • Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode).
  • a carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)).
  • Devices of the wireless communications system 100 e.g., the base stations 105, the UEs 115, or both
  • the wireless communications system 100 may include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths.
  • each served UE 115 may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
  • Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT- S-OFDM)).
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT- S-OFDM discrete Fourier transform spread OFDM
  • a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both).
  • the more resource elements that a UE 115 receives and the higher the order of the modulation scheme the higher the data rate may be for the UE 115.
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE 115.
  • a spatial resource e.g., spatial layers or beams
  • One or more numerologies for a carrier may be supported, where a numerology may include a subcarrier spacing (D/) and a cyclic prefix.
  • a carrier may be divided into one or more BWPs having the same or different numerologies.
  • a UE 115 may be configured with multiple BWPs.
  • a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).
  • SFN system frame number
  • Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration.
  • a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots.
  • each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing.
  • Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period).
  • a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
  • a subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI).
  • TTI duration e.g., the number of symbol periods in a TTI
  • the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region e.g., a control resource set (CORESET)
  • CORESET control resource set
  • One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115.
  • one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner.
  • An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size.
  • Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
  • Each base station 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof.
  • the term “cell” may refer to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others).
  • a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) over which the logical communication entity operates.
  • Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station 105.
  • a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas 110, among other examples.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells.
  • Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG), the UEs 115 associated with users in a home or office).
  • a base station 105 may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access for different types of devices.
  • protocol types e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105.
  • the overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.
  • the wireless communications system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timings, and transmissions from different base stations 105 may, in some examples, not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Some UEs 115 may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication).
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction- based business charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously). In some examples, half-duplex communications may be performed at a reduced peak rate.
  • Other power conservation techniques for the UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs)) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs)) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • the wireless communications system 100 may be configured to support ultra reliable communications or low-latency communications, or various combinations thereof.
  • the wireless communications system 100 may be configured to support ultra reliable low-latency communications (URLLC) or mission critical communications.
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions).
  • Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT), mission critical video (MCVideo), or mission critical data (MCData).
  • MCPTT mission critical push-to-talk
  • MCVideo mission critical video
  • MCData mission critical data
  • Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications.
  • the terms ultra-reliable, low-latency, mission critical, and ultra-reliable low- latency may be used interchangeably herein.
  • a UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol).
  • D2D device-to-device
  • P2P peer-to-peer
  • One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105.
  • groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1 :M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs 115 without the involvement of a base station 105.
  • the D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115).
  • vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these.
  • V2X vehicle-to-everything
  • V2V vehicle-to-vehicle
  • a vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system.
  • vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., base stations 105) using vehicle-to-network (V2N) communications, or with both.
  • V2N vehicle-to-network
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) or 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)).
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management function
  • S-GW serving gateway
  • PDN Packet Data Network gateway
  • UPF user plane function
  • the control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the base stations 105 associated with the core network 130.
  • NAS non-access stratum
  • User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions.
  • the user plane entity may be connected to the network operators IP services 150.
  • the operators IP services 150 may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet- Switched Streaming Service.
  • Some of the network devices may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC).
  • Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs).
  • Each access network transmission entity 145 may include one or more antenna panels.
  • various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105).
  • the wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz).
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors.
  • the transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • the wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band, or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band.
  • SHF super high frequency
  • EHF extremely high frequency
  • the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the base stations 105, and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions.
  • the techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • the wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • devices such as the base stations 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA).
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • Devices in wireless communications system 100 may communicate over unlicensed spectrum, such as the 5 GHz band, the 2.4 GHz band, the 60 GHz band, the 3.6 GHz band, and/or the 900 MHz band.
  • the unlicensed spectrum may also include other frequency bands.
  • a base station 105 or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.
  • the base stations 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers.
  • Such techniques may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords).
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • MU-MIMO multiple
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation).
  • a base station 105 or a UE 115 may use beam sweeping techniques as part of beam forming operations.
  • a base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with aUE 115.
  • Some signals e.g., synchronization signals, reference signals, beam selection signals, or other control signals
  • the base station 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission.
  • Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the base station 105.
  • a transmitting device such as a base station 105
  • a receiving device such as a UE 115
  • Some signals may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115).
  • the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report to the base station 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
  • transmissions by a device may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station 105 to a UE 115).
  • the UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands.
  • the base station 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or unprecoded.
  • a reference signal e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)
  • the UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook).
  • PMI precoding matrix indicator
  • codebook-based feedback e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook.
  • a receiving device may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • receive configurations e.g., directional listening
  • a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions.
  • receive beamforming weight sets e.g., different directional listening weight sets
  • a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal).
  • the single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).
  • SNR signal-to-noise ratio
  • the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack.
  • communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP -based.
  • a Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency.
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or a core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • transport channels may be mapped to physical channels.
  • the UEs 115 and the base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link 125.
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)).
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions).
  • a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • Some scheduling scenarios may cause various uplink channels to overlap in time. For example, resources of a scheduled PUSCH may overlap with resources of a PUCCH.
  • a UE 115 may be scheduled to transmit an uplink message (e.g., uplink control information (UCI)) in the PUCCH resources. If the UE 115 detects that a PUSCH resource overlaps with PUCCH resources, the UE 115 may transmit the uplink message in the PUSCH resources (e.g., along with an uplink message scheduled for transmission in the PUSCH resources). In such cases, the UE 115 may multiplex information (e.g., HARQ-ACK and/or CSI reports) with the messages scheduled for the PUSCH channel.
  • uplink message e.g., uplink control information (UCI)
  • the UE 115 may transmit the uplink message in the PUSCH resources (e.g., along with an uplink message scheduled for transmission in the PUSCH resources). In such cases, the UE 115 may multiplex information (e.
  • the UE 115 may not transmit scheduling request (SR) information when the channels overlap.
  • the UE 115 may determine to not transmit the PUSCH messages when the resources overlap. For example, when the UE 115 would transmit a PUSCH message on a serving cell without UL- SCH that overlaps with a PUCCH transmission on a serving cell that includes positive SR information, the UE 115 may determine to not transmit the PUSCH. Accordingly, when an overlap is detected or otherwise identified between channels, the UE 115 may determine to transmit an uplink message scheduled for transmission in one of the overlapping channels on resources of the other overlapping channel.
  • SR scheduling request
  • the UEs 115 may be configured to use a cyclic prefix (CP) to provide a guard period at the start of a symbol (e.g., orthogonal frequency division multiplexing (OFDM) symbol) which provides protection against multi-path delay spread.
  • CP cyclic prefix
  • OFDM orthogonal frequency division multiplexing
  • the CP may be generated by copying the end of the main body of the symbol to a beginning of the symbol, such that a frequency domain representation of each delay spread component within a fast Fourier transform (FFT) processing window is the same.
  • FFT fast Fourier transform
  • a UE 115 may use a cyclic prefix extension (CPE) length for different scenarios (e.g., high delay spread scenarios).
  • CPE cyclic prefix extension
  • the CP extension may be used to create a gap of a specific duration (e.g., 16 microseconds (ps),
  • the utilization of a cyclic prefix extension associated with an uplink channel may overlap or conflict with another uplink channel.
  • Implementations described herein provide techniques in which the UE 115 and/or base station 105 may identify cases when utilization of a CP extension for an uplink channel may conflict (e.g., overlap) with another uplink channel.
  • the UE 115 and/or base station 105 may identify a reference duration that may be compared with a gap between two uplink channels to determine whether the uplink channels conflict.
  • the reference duration may be based on a cyclic prefix extension duration (e.g., a default duration), a timing advance (TA) value or both.
  • TA timing advance
  • the UE 115 may transmit one or more messages on one of the two uplink channels in accordance with a priority associated with the channels and/or messages.
  • the reference duration may be an agreed upon duration by the UE 115 and the base station 105, such as a maximum CP extension duration and/or a minimum (e.g., zero) CP extension duration. Accordingly, both devices may be able to identify the conflict, and transmit/receive uplink messages accordingly.
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • wireless communications system 200 may implement aspects of wireless communication system 100.
  • the wireless communications system 200 includes a base station 105-a and a UE 115-a, which may be examples of the corresponding devices of FIG. 1.
  • base station 105-a and UE 115-a may communicate on resources of a communication link 230.
  • communication link 230 may include resources in an unlicensed band (e.g., NR-U communications).
  • UE 115-a may be allowed to start transmission at transmission opportunities provided by a configured grant at the configured/indicated started position, such as at the beginning of PUSCH 220 resources allocated by a configured grant.
  • the wireless communications system 200 may allow the UE 115-a to select a starting time offset in which to transmit a cyclic prefix extension such as to randomly allow multiple UEs 115 to share configured grant resources. That is, the UE 115-a may randomly select a cyclic prefix extension duration, and the first in time UE 115 to transmit (e.g., perform LBT) may be able to utilize the CG resources (e.g., the PUSCH 220).
  • PUCCH 205 resources may be periodically or dynamically allocated to start before and/or after the PUSCH 220 resources. Some scenarios may result in PUSCH 220 resources overlapping in time with PUCCH 205 resources. Further, when PUCCH 205 resources and PUSCH 220 resources do not directly overlap, the utilization a CP extension 215 for the PUSCH 220 transmission may cause the CP extension 210 to overlap (e.g., at location 225) with PUCCH 205 resources, which may cause a conflict between the PUCCH 205 and the PUSCH 220.
  • UE 115-a may be configured to transmit UCI 235 (scheduled for transmission in the PUCCH 205) in the resources of the PUSCH 220. That is, the UE 115-a may transmit at least a portion of a message scheduled for transmission on the PUCCH 205 resources on the resources of the PUSCH 220. Because a UE 115-a may generally select the cyclic prefix extension value, the base station 105-a may not be aware of how the UE 115-a determines a conflict and/or transmits messages on conflicting channels.
  • the various implementations described herein may provide techniques for identifying a conflict between uplink channels, such as the PUCCH 205 and PUSCH 220, when using a CP extension 215.
  • the UE 115-a may identify that the UE 115-a is scheduled to transmit a first uplink message on a first uplink channel (e.g., PUCCH 205) and is scheduled to transmit a second uplink message on a second uplink channel (e.g., PUSCH 220).
  • the UE 115-a may determine a reference duration associated with the resources of the second uplink channel.
  • the reference duration includes a cyclic prefix extension value, a timing advance value, or both, and the UE 115-a may compare the reference duration to a gap between uplink channels to determine whether the channels conflict.
  • the reference duration may correspond to a maximum cyclic prefix extension duration that the UE 115-a is able to transmit. Accordingly, if the UE 115-a determines that the CP extension 215 overlaps with the PUCCH 205 if the CP extension 215 were of a maximum duration, then the UE 115-a identifies that a conflict exists between uplink channels and transmits one or more messages on either of the uplink channels.
  • the reference duration is 0. That is, the UE 115-a may assume no cyclic prefix extension duration in determining a conflict between uplink channels.
  • the implementations described may be applicable to other uplink channels, channel configurations (e.g., PUCCH and PUCCH, PUSCH then PUCCH), and various types of uplink messages (e.g., reference signals).
  • the technique or reference duration used to determine whether a conflict exists may depend on whether resources for one or both of the uplink channels are scheduled via scheduled uplink (e.g., via downlink control information (DCI) signaling) allocated via configured grant (e.g., via RRC signaling). Additionally, the technique or reference duration may depend on whether a configured grant allocates a full or partial subband, whether the UE 115-a or the base station 105-a indicates a cyclic prefix extension duration, etc.
  • FIG. 3 illustrates an example of a transmission timeline 300 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • transmission timeline 300 may implement aspects of wireless communication system 100.
  • the transmission timeline 300 may be used by a UE 115 when transmitting uplink signals to a base station 105.
  • the transmission timeline includes a PUCCH 305, which may be an example of a first uplink channel 340, and a PUSCH 320, which may be an example of a second uplink channel 345.
  • devices may identify conflict (e.g., overlap) between the first uplink channel 340 and the second uplink channel 345 based on a maximum CP extension value 330 configured at the UE 115. Accordingly, the UE 115 utilizes the maximum CP extension value 330 as the reference duration 335 in determining whether a conflict exists between the first uplink channel 340 and the second uplink channel 345.
  • the reference duration 335 may be compared to a gap between the uplink channels (e.g., the PUCCH 305 and the PUSCH 320) to determine whether a conflict exists between the channel.
  • the maximum CP extension value 330 may be utilized even when an actual duration of a CP extension 315 is less than the maximum duration. Accordingly, the maximum cp extension value 330 may include the actual CP extension 315 and an assumed additional CP extension 325. Based on utilizing the maximum duration as the reference duration 335, both the UE 115 and the base station 105 may be able to identify a conflict between channels, and address the conflict in accordance with a priority between uplink messages scheduled for transmission on the resources of the uplink channels.
  • the UE 115 may determine to transmit on one of the two channels. For example, the UE 115 may be scheduled to transmit UCI on the PUCCH 305. After identifying the conflict between the PUCCH 305 and the PUSCH 320 based on the reference duration 335, the UE 115 may determine to transmit the UCI on the resources of the PUSCH. Accordingly, the UE 115 may multiplex the UCI with a message scheduled for transmission on the PUSCH 320. In another case, the UE 115 may determine to not transmit a message scheduled for a conflicting channel.
  • the UE 115 may determine to not transmit a message scheduled for transmission on the PUSCH 320 upon determining that the PUSCH 320 conflicts with the PUCCH 305 based on the reference duration 335. Based on the conflict rule and the response, the UE 115 may also identify the conflict and may not perform detect of one of the channels (e.g., detection of PUCCH for UCI).
  • FIG. 4A and 4B illustrate examples of transmission timelines 400 that support determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • transmission timeline 400 may implement aspects of wireless communication system 100.
  • the transmission timelines 400 may be used by a UE 115 when transmitting uplink signals to a base station 105.
  • the transmission timelines include a PUCCH 405, which may be an example of a first uplink channel 440, and a PUSCH 420, which may be an example of a second uplink channel 445.
  • PUCCH 405 which may be an example of a first uplink channel 440
  • PUSCH 420 which may be an example of a second uplink channel 445.
  • devices e.g., a UE 115 and a base station 105 may identify conflict (e.g., overlap) between the first uplink channel 440 and the second uplink channel 445 based on a minimum CP extension value configured at the UE 115 (e.g., a duration of zero). Accordingly, the UE 115 a reference duration of zero in determining whether a conflict exists between the first uplink channel 440 and the second uplink channel 445. That is, the overlap between the PUCCH 405 and the PUSCH 420 may be identified without considering a CP extension 415 (even when the UE 115 intends to use the CP extension 415).
  • conflict e.g., overlap
  • a minimum CP extension value configured at the UE 115
  • the UE 115 a reference duration of zero in determining whether a conflict exists between the first uplink channel 440 and the second uplink channel 445. That is, the overlap between the PUCCH 405 and the PUSCH 420 may be identified without considering
  • the reference duration 435 may be compared to a gap between the uplink channels (e.g., the PUCCH 405 and the PUSCH 420) to determine whether a conflict exists between the channel. Based on utilizing zero as the reference duration 435, both the UE 115 and the base station 105 may be able to identify a conflict between channels, and address the conflict in accordance with a priority between uplink messages scheduled for transmission on the resources of the uplink channels.
  • the UE 115 identifies a conflict based on the PUCCH 405 and the PUSCH 420 overlapping (e.g., with a reference duration of zero), and may transmit one or more uplink message on one of the channels based on identification of the overlapping as described with respect to FIG. 3.
  • the UE 115 may transmit the CP extension 415, which corresponds to transmission of the resources of the PUSCH 420.
  • the UE 115 does not identify a conflict based on the PUCCH 405 and the PUSCH 420 not overlapping (e.g., with a reference duration of zero).
  • the UE may consider whether the gap between PUCCH 405 and PUSCH 420 is within allowed CP extension limits. If the gap may be filled by a CP extension 415 within the allowed limits, then the UE 115 may transmit on the resources of the PUCCH 405, the CP extension 415, and on the resources of the PUSCH 420. The UE may select a CP extension duration such that here is no transmission gap between the PUCCH 405 and the PUSCH 420. That is, the UE 115 may select the duration of the CP extension 415 such that the CP extension 415 fills the gap between the channels.
  • the UE 115 may treat the PUCCH 405 and PUSCH 420 resources independently for performing LBT, and the UE 115 performs a first LBT procedure for PUCCH 405 and a second LBT procedure for PUSCH 420.
  • the CP extension 415 for PUSCH 420 may be determined according to a standard rule (e.g., a random selection or based on LBT success time instance). [0110] In some cases, the options for determining conflicts using various reference durations may vary depend on context.
  • a CP extension value when a CP extension value is signaled by a base station 105 to the UE 115 (e.g., the UE does not autonomously select the CP extension), then the overlap/conflict criteria may be considered using the exact CP extension to be used by the UE. If uplink resources (e.g., PUSCH 425) are allocated via scheduled uplink or configured grant with a partial bandwidth, then the base station 105 may signal the exact CP extension value, and that value may be used in conflict determination.
  • uplink resources e.g., PUSCH 425) are allocated via scheduled uplink or configured grant with a partial bandwidth
  • the UE 115 and/or base station may utilize the reference duration based on maximum/default CP extension or a zero CP extension as described herein (or a maximum/default or zero TA value as described below).
  • the technique used (e.g., the reference duration) to determine conflicts between channels may be a function of whether the uplink resources are allocated via scheduled uplink (e.g., consider an actual CP extension) or via configured grant (e.g., use a reference duration based on a maximum or zero CP extension). Further in these cases, the devices may consider whether the configured grant allocated a partial bandwidth (e.g., within a subband), where the devices may utilize the reference duration, or whether the configured grant allocates a full bandwidth of a subband (e.g., use the actual CP extension value). Additionally, the base station 105 may configure which option to use for the type of uplink transmission (e.g., scheduled uplink or configured grant) using RRC signaling.
  • the type of uplink transmission e.g., scheduled uplink or configured grant
  • the devices may consider whether the base station 105 selects the CP extension value or the UE selects the CP extension value in determining which technique and/or reference duration to consider for conflict determination. For example, if the base station selects the CP extension value, then the devices may use the actual CP extension value for overlap determination. If the UE selects the CP extension value (e.g., randomly), then the devices may use one of the agreed upon reference durations (e.g., maximum or zero) for overlap determination.
  • the agreed upon reference durations e.g., maximum or zero
  • the techniques are described with respect to PUSCH and PUCCH resources, but the techniques may be applicable in other scenarios.
  • the CP extension may be applied to a PUCCH transmission that occurs after a PUSCH. That is, a CP extension may be associated with a PUCCH resource that follows a PUSCH resources.
  • the described solutions may be applied to determine whether the channels overlap (assuming the CP extension on PUCCH). In such cases, if an overlap is identified, then the UE 115 may multiplex UCI on the earlier PUSCH, for example. It should be noted that there may be different solutions for CP extension on PUCCH compared to CP extension on PUSCH.
  • the reference value or technique used to identify the overlap may depend on the channel for which the CP extension is applied.
  • the solutions described may be utilized for other uplink channels. For example, if one uplink channel is allocated for a sounding reference signal for which a CP extension may be applied, then the techniques described herein may be used to determine conflicts between the sounding reference signal (SRS) channel and other channels.
  • SRS sounding reference signal
  • FIG. 5 illustrates an example of a transmission timeline 500 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • transmission timeline 500 may implement aspects of wireless communication system 100
  • the transmission timeline 500 may be used by a UE 115 when transmitting uplink signals to a base station 105.
  • the transmission timeline includes a PUCCH 505, which may be an example of a first uplink channel 540, and a PUSCH 525, which may be an example of a second uplink channel 545.
  • devices e.g., a UE 115 and a base station 105 may identify conflict (e.g., overlap) between the first uplink channel 540 and the second uplink channel 545 based on a TA value 530 configured at the UE 115.
  • a duration of a CP extension 520 associated with PUSCH 525 may depend at least in part on the TA value 530.
  • the supported durations for CP extensions may be 0 (e.g., no CP extension 520),
  • C l * symbol length - 25 ps, C2*symbol length - 16 ps - TA, C3*symbol length - 25 ps - TA, 16 ps and 25 ps may correspond to the LBT procedure duration, and Cl, C2, and C3 are integers that may be configured to the UE 115. Since the CP extension 520 is dependent on the TA value 530 and the CP extension 520 may cause conflicts between channels (e.g., PUCCH 505 and PUSCH 525), the UE 115 and the base station 105 may determine to identify whether the conflict exists based on the TA value 530.
  • channels e.g., PUCCH 505 and PUSCH 525
  • the UE 115 may identify an overlap between the PUCCH 505 and PUSCH 525 using a reference duration based on a maximum supported TA value, a default TA value, or a TA value of 0. As described with respect to the reference duration dependent on the maximum, default, or zero CP extension value, the UE 115 and the base station 105 may be able to determine when a conflict between channels exists and address the conflicts accordingly. [0115] In some cases, the base station 105 may configure (e.g., using RRC signaling) the UE 115 to consider the actual TA value for overlap/conflict determinization.
  • the UE 115 may inform the base station 105 of its actual TA value or the reference duration (e.g., maximum TA value, default TA value, or zero TA value) used in identifying a conflict between channels.
  • the consideration of the actual TA value for the UE 115 may depend on which configuration (e.g., CP extension parameter) for the CP extension (e.g., Cl, C2, or C3) is indicated by the base station 105.
  • the actual TA value for the UE 115 may not be considered for overlap determination when C2 >1 in the CP extension configurations .
  • both the UE 115 and the base station 105 may identify a conflict between the channels and address the conflicts accordingly.
  • the UE 115 may transmit on one of the conflicting channels as described with respect to FIG. 3.
  • the UE 115 may consider an uncertainty in a TA value in selecting the technique or reference duration. For example, if the uncertainty of the TA value 530 between the UE 115 and the base station is greater than a threshold level of uncertainty, then the UE 115 may utilize a reference duration (based on a maximum TA value, a default TA value, a zero TA value, etc.). Otherwise, the UE 115 may determine to use the actual TA value 530 for overlap/conflict determination.
  • FIG. 6 illustrates an example of a process flow diagram 600 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • process flow diagram 600 may implement aspects of wireless communication system 100.
  • the process flow diagram includes a base station 105-b and a UE 115-b, which may be examples of the corresponding devices as described with respect to FIGs. 1 through 5.
  • the UE 115-b may identify that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel.
  • the UE 115-b may determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof.
  • the reference duration may be a maximum CP extension value capable of transmission by the UE 115-b, a default value, a minimum value, etc.
  • the reference duration depends on a default or zero duration for a TA value.
  • the reference duration may depend on whether one of the uplink channels is allocated via scheduled uplink or configured grant, whether the base station 105-b indicated a CP extension value, etc.
  • the UE 115-b may identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based at least in part on the determined reference duration.
  • the conflict may be determined by identifying a duration of a gap between uplink channels and comparing the reference duration to the duration of the gap.
  • the UE 115-b may transmit, based at least in part on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the UE 115- b may multiplex an uplink message scheduled for transmission on one of the uplink channels on resources of the other uplink channel based on the priority.
  • the priority may depend on the message type, the channel type, etc.
  • FIG. 7 shows a block diagram 700 of a device 705 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the device 705 may be an example of aspects of a UE 115 as described herein.
  • the device 705 may include a receiver 710, a communications manager 715, and a transmitter 720.
  • the device 705 may also include one or more processors, memory coupled with the one or more processors, and instructions stored in the memory that are executable by the one or more processors to enable the one or more processors to determine priorities for overlapping channels as discussed herein. .
  • Each of these components may be in communication with one another (e.g., via one or more buses).
  • the receiver 710 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to determining priorities for overlapping channels, etc.). Information may be passed on to other components of the device 705.
  • the receiver 710 may be an example of aspects of the transceiver 1020 described with reference to FIG. 10.
  • the receiver 710 may utilize a single antenna or a set of antennas.
  • the communications manager 715 may identify that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel, determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration, and transmit, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the communications manager 715 may be an example of aspects of the communications manager 1010 described herein.
  • the communications manager 715 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 715, or its sub-components may be executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • the communications manager 715 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 715, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 715, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 720 may transmit signals generated by other components of the device 705.
  • the transmitter 720 may be collocated with a receiver 710 in a transceiver module.
  • the transmitter 720 may be an example of aspects of the transceiver 1020 described with reference to FIG. 10.
  • the transmitter 720 may utilize a single antenna or a set of antennas.
  • the communications manager 715 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 710 and transmitter 720 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception over one or more bands.
  • analog components e.g., amplifiers, filters, antennas
  • the communications manager 715 as described herein may be implemented to realize one or more potential advantages.
  • One implementation may allow the device 705 to more efficiently coordinate communication when potential conflicts between channels exist based on utilization of a CP extension and/or a timing advance, and more specifically to coordinate uplink transmission communication from the device 705 to a base station 105 based on conflict identification.
  • the device 705 may identify a conflict based on reference duration and transmit uplink communications in accordance with the conflict and a priority between uplink channels.
  • a processor of a UE 115 may increase reliability and decrease signaling overhead in the communication of uplink transmissions because the UE may be able to efficiently identify conflicts and communicate on one of the conflicting channels.
  • FIG. 8 shows a block diagram 800 of a device 805 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the device 805 may be an example of aspects of a device 705, or a UE 115 as described herein.
  • the device 805 may include a receiver 810, a communications manager 815, and a transmitter 840.
  • the device 805 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
  • the receiver 810 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to determining priorities for overlapping channels, etc.). Information may be passed on to other components of the device 805.
  • the receiver 810 may be an example of aspects of the transceiver 1020 described with reference to FIG. 10.
  • the receiver 810 may utilize a single antenna or a set of antennas.
  • the communications manager 815 may be an example of aspects of the communications manager 715 as described herein.
  • the communications manager 815 may include a schedule identifier 820, a reference duration component 825, a conflict identifier 830, and a communication interface 835.
  • the communications manager 815 may be an example of aspects of the communications manager 1010 described herein.
  • the schedule identifier 820 may identify that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel.
  • the reference duration component 825 may determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof.
  • the conflict identifier 830 may identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration.
  • the communication interface 835 may transmit, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the transmitter 840 may transmit signals generated by other components of the device 805.
  • the transmitter 840 may be collocated with a receiver 810 in a transceiver module.
  • the transmitter 840 may be an example of aspects of the transceiver 1020 described with reference to FIG. 10.
  • the transmitter 840 may utilize a single antenna or a set of antennas.
  • the schedule identifier 820, reference duration component 825, conflict identifier 830, and communication interface 835 may each be or be at least a part of a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor).
  • the processor may be coupled with memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of the schedule identifier 820, reference duration component 825, conflict identifier 830, and communication interface 835 discussed herein.
  • a transceiver processor may be collocated with and/or communicate with (e.g., direct the operations of) a transceiver of the device.
  • a radio processor may be collocated with and/or communicate with (e.g., direct the operations of) a radio (e.g., an NR radio, an LTE radio, a Wi-Fi radio) of the device.
  • a transmitter processor may be collocated with and/or communicate with (e.g., direct the operations of) a transmitter of the device.
  • a receiver processor may be collocated with and/or communicate with (e.g., direct the operations of) a receiver of the device.
  • FIG. 9 shows a block diagram 900 of a communications manager 905 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the communications manager 905 may be an example of aspects of a communications manager 715, a communications manager 815, or a communications manager 1010 described herein.
  • the communications manager 905 may include a schedule identifier 910, a reference duration component 915, a conflict identifier 920, a communication interface 925, a gap identifier 930, a DCI component 935, an RRC component 940, a TA component 945, and a CP extension component 950.
  • Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).
  • the schedule identifier 910 may identify that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel.
  • the first uplink channel includes a first of a physical uplink control channel or a physical uplink shared channel and the second uplink channel includes a second of the physical uplink control channel or the physical uplink shared channel.
  • one of the first uplink message or the second uplink message includes a reference signal.
  • the reference duration component 915 may determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof. [0145] In some examples, the reference duration component 915 may compare the reference duration with the duration of the gap between the resources of the first uplink channel and the resources of the second uplink channel, where the conflict is identified based on the comparing.
  • the reference duration component 915 may determine the reference duration based on the timing advance value.
  • the reference duration component 915 may transmit, based on the timing advance value, an indication of the reference duration used by the UE.
  • the reference duration component 915 may determine the reference duration responsive to the received parameter value.
  • the reference duration includes a maximum duration of a cyclic prefix extension that the UE is allowed to transmit.
  • the reference duration is zero and the conflict is identified based at least on part on the resources of the second uplink channel overlapping with the resources of the first uplink channel.
  • the reference duration is a maximum cyclic prefix extension that the UE is allowed to transmit or zero based on the configured grant.
  • the configured grant allocates a subset of a subband for the resources of the first uplink channel or the resources of the second uplink channel, where the reference duration is the maximum cyclic prefix extension allowed to transmit by the UE or zero based on the configured grant allocating the subset of the subband.
  • the reference duration is determined based on whether a duration of a cyclic prefix extension is determined by the UE or indicated by a base station.
  • the reference duration is a maximum timing advance value or zero when an uncertainty of the timing advance value used by UE is greater than a threshold value.
  • the conflict identifier 920 may identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration.
  • the conflict identifier 920 may refrain from transmitting on the other one of the resources of the first uplink channel or the resources of the second uplink channel based on the priority.
  • the communication interface 925 may transmit, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the communication interface 925 may transmit both the first uplink message and the second uplink message on the resources of the second uplink channel.
  • the communication interface 925 may transmit both the first uplink message and the second uplink message on the resources of the first uplink channel.
  • the first uplink message includes uplink control information.
  • the second uplink message includes uplink control information.
  • the gap identifier 930 may identify a duration of a gap between the resources of the first uplink channel and the resources of the second uplink channel.
  • the DCI component 935 may receive downlink control information scheduling the resources of the first uplink channel or the resources of the second uplink channel, where the downlink control information indicates the cyclic prefix extension value and the reference duration includes the cyclic prefix extension value.
  • the RRC component 940 may receive a radio resource control signal including a configured grant allocating the resources of the first uplink channel, or the second uplink channel, or both, where the reference duration is identified based on the configured grant.
  • the RRC component 940 may receive a radio resource control signal including a first indication of the reference duration to use when the resources of the second uplink channel are allocated via configured grant and a second indication of the reference duration to use when the resources of the second uplink channel are scheduled according to downlink control information.
  • the TA component 945 may transmit an indication of the timing advance value to a base station, where the priority is determined based on the timing advance value.
  • the TA component 945 may receive, from a base station, an instruction to determine the reference duration using the timing advance value, where the reference duration is determined in accordance with the received instruction.
  • the CP extension component 950 may receive, from a base station, a parameter value for a cyclic prefix extension.
  • the schedule identifier 910, reference duration component 915, conflict identifier 920, communication interface 925, gap identifier 930, DCI component 935, RRC component 940, TA component 945, and CP extension component 950 may each be or be at least a part of a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor).
  • a processor e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor.
  • the processor may be coupled with memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of the schedule identifier 910, reference duration component 915, conflict identifier 920, communication interface 925, gap identifier 930, DCI component 935, RRC component 940, TA component 945, and CP extension component 950 discussed herein.
  • FIG. 10 shows a diagram of a system 1000 including a device 1005 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the device 1005 may be an example of or include the components of device 705, device 805, or a UE 115 as described herein.
  • the device 1005 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1010, an I/O controller 1015, a transceiver 1020, an antenna 1025, memory 1030, and a processor 1040. These components may be in electronic communication via one or more buses (e.g., bus 1045).
  • buses e.g., bus 1045
  • the communications manager 1010 may identify that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel, determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration, and transmit, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the I/O controller 1015 may manage input and output signals for the device 1005.
  • the I/O controller 1015 may also manage peripherals not integrated into the device 1005.
  • the I/O controller 1015 may represent a physical connection or port to an external peripheral.
  • the I/O controller 1015 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system.
  • the I/O controller 1015 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 1015 may be implemented as part of a processor.
  • a user may interact with the device 1005 via the I/O controller 1015 or via hardware components controlled by the I/O controller 1015.
  • the transceiver 1020 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 1020 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1020 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 1025. However, in some cases the device may have more than one antenna 1025, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 1030 may include RAM and ROM.
  • the memory 1030 may store computer-readable, computer-executable code 1035 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 1030 may contain, among other things, a basic input/output system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic input/output system
  • the processor 1040 may include an intelligent hardware device, (e.g., a general- purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof).
  • the processor 1040 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 1040.
  • the processor 1040 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1030) to cause the device 1005 to perform various functions (e.g., functions or tasks supporting determining priorities for overlapping channels).
  • the code 1035 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 1035 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory.
  • the code 1035 may not be directly executable by the processor 1040 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 11 shows a block diagram 1100 of a device 1105 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the device 1105 may be an example of aspects of a base station 105 as described herein.
  • the device 1105 may include a receiver 1110, a communications manager 1115, and a transmitter 1120.
  • the device 1105 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
  • the receiver 1110 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to determining priorities for overlapping channels, etc.). Information may be passed on to other components of the device 1105.
  • the receiver 1110 may be an example of aspects of the transceiver 1420 described with reference to FIG. 14.
  • the receiver 1110 may utilize a single antenna or a set of antennas.
  • the communications manager 1115 may identify that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel, determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration, and receive, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the communications manager 1115 may be an example of aspects of the communications manager 1410 described herein.
  • the communications manager 1115 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 1115, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • code e.g., software or firmware
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate
  • the communications manager 1115 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 1115, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 1115, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 1120 may transmit signals generated by other components of the device 1105.
  • the transmitter 1120 may be collocated with a receiver 1110 in a transceiver module.
  • the transmitter 1120 may be an example of aspects of the transceiver 1420 described with reference to FIG. 14.
  • the transmitter 1120 may utilize a single antenna or a set of antennas.
  • FIG. 12 shows a block diagram 1200 of a device 1205 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the device 1205 may be an example of aspects of a device 1105, or a base station 105 as described herein.
  • the device 1205 may include a receiver 1210, a communications manager 1215, and a transmitter 1240.
  • the device 1205 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
  • the receiver 1210 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to determining priorities for overlapping channels, etc.). Information may be passed on to other components of the device 1205.
  • the receiver 1210 may be an example of aspects of the transceiver 1420 described with reference to FIG. 14.
  • the receiver 1210 may utilize a single antenna or a set of antennas.
  • the communications manager 1215 may be an example of aspects of the communications manager 1115 as described herein.
  • the communications manager 1215 may include a schedule identifier 1220, a reference duration component 1225, a conflict identifier 1230, and a communication interface 1235.
  • the communications manager 1215 may be an example of aspects of the communications manager 1410 described herein.
  • the schedule identifier 1220 may identify that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel.
  • the reference duration component 1225 may determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof.
  • the conflict identifier 1230 may identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration.
  • the communication interface 1235 may receive, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the transmitter 1240 may transmit signals generated by other components of the device 1205.
  • the transmitter 1240 may be collocated with a receiver 1210 in a transceiver module.
  • the transmitter 1240 may be an example of aspects of the transceiver 1420 described with reference to FIG. 14.
  • the transmitter 1240 may utilize a single antenna or a set of antennas.
  • FIG. 13 shows a block diagram 1300 of a communications manager 1305 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the communications manager 1305 may be an example of aspects of a communications manager 1115, a communications manager 1215, or a communications manager 1410 described herein.
  • the communications manager 1305 may include a schedule identifier 1310, a reference duration component 1315, a conflict identifier 1320, a communication interface 1325, a gap identifier 1330, a DCI component 1335, an RRC component 1340, and a CP extension component 1345.
  • Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).
  • the schedule identifier 1310 may identify that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel.
  • the first uplink channel includes a first of a physical uplink control channel or a physical uplink shared channel and the second uplink channel includes a second of the physical uplink control channel or the physical uplink shared channel.
  • one of the first uplink message or the second uplink message includes a reference signal.
  • the reference duration component 1315 may determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof.
  • the reference duration component 1315 may determine the reference duration based on the timing advance value. [0199] In some examples, the reference duration component 1315 may receive, from the UE, an indication of the timing advance value, where the priority is determined based on the received indication of the timing advance value.
  • the reference duration includes a maximum duration of a cyclic prefix extension that the UE is allowed to transmit.
  • the reference duration is zero and the conflict is identified based at least on part on the resources of the second uplink channel overlapping with the resources of the first uplink channel.
  • the reference duration is a maximum cyclic prefix extension allowed to transmit by the UE or zero based on the configured grant.
  • the configured grant allocates a subset of a subband for the resources of the first uplink channel or the resources of the second uplink channel, where the reference duration is the maximum cyclic prefix extension allowed to transmit by the UE or zero based on the configured grant allocating the subset of the subband.
  • the reference duration is determined based on whether a duration of a cyclic prefix extension is determined by the UE or indicated by a base station.
  • the reference duration value is a maximum timing advance value or zero when an uncertainty of the timing advance value used by UE is greater than a threshold value.
  • the conflict identifier 1320 may identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration.
  • the conflict identifier 1320 may compare the reference duration with the duration of the gap between the resources of the first uplink channel and the resources of the second uplink channel, where the conflict is identified based on the comparing.
  • the communication interface 1325 may receive, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the communication interface 1325 may receive both the first uplink message and the second uplink message on the resources of the first uplink channel or on the resources of the second uplink channel.
  • the communication interface 1325 may transmit, to the UE, an instruction to determine the reference duration using the timing advance value, where the reference duration is determined in accordance with the transmitted instruction.
  • the communication interface 1325 may receive, from the UE, an indication of a process used to determine the reference duration by the UE.
  • one of the first uplink message or the second uplink message includes uplink control information.
  • the gap identifier 1330 may identify a duration of a gap between the resources of the first uplink channel and the resources of the second uplink channel.
  • the DCI component 1335 may transmit downlink control information scheduling the resources of the first uplink channel or the resources of the second uplink channel, where the downlink control information indicates the cyclic prefix extension value and the reference duration includes the cyclic prefix extension value.
  • the RRC component 1340 may transmit a radio resource control signal including a configured grant allocating the resources of the first uplink channel, the second uplink channel, or both, where the reference duration is identified based on the configured grant.
  • the RRC component 1340 may transmit a radio resource control signal including a first indication of the reference duration to use when the resources of the second uplink channel are allocated via configured grant and a second indication of the reference duration to use when the resources of the second uplink channel are scheduled according to downlink control information.
  • the CP extension component 1345 may determine a duration of a cyclic prefix extension based on the configured grant allocating a full subband, where the reference duration includes the determined duration of the cyclic prefix extension. [0218] In some examples, the CP extension component 1345 may transmit, to the UE, a parameter value for a cyclic prefix extension, where the reference duration is determined based on the parameter value.
  • FIG. 14 shows a diagram of a system 1400 including a device 1405 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the device 1405 may be an example of or include the components of device 1105, device 1205, or a base station 105 as described herein.
  • the device 1405 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1410, a network communications manager 1415, a transceiver 1420, an antenna 1425, memory 1430, a processor 1440, and an inter-station communications manager 1445. These components may be in electronic communication via one or more buses (e.g., bus 1450).
  • buses e.g., bus 1450
  • the communications manager 1410 may identify that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel, determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof, identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration, and receive, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the network communications manager 1415 may manage communications with the core network (e.g., via one or more wired backhaul links). For example, the network communications manager 1415 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • the transceiver 1420 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 1420 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1420 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 1425. However, in some cases the device may have more than one antenna 1425, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 1430 may include RAM, ROM, or a combination thereof.
  • the memory 1430 may store computer-readable code 1435 including instructions that, when executed by a processor (e.g., the processor 1440) cause the device to perform various functions described herein.
  • a processor e.g., the processor 1440
  • the memory 1430 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the processor 1440 may include an intelligent hardware device, (e.g., a general- purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof).
  • the processor 1440 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into processor 1440.
  • the processor 1440 may be configured to execute computer- readable instructions stored in a memory (e.g., the memory 1430) to cause the device 1405 to perform various functions (e.g., functions or tasks supporting determining priorities for overlapping channels).
  • the inter-station communications manager 1445 may manage communications with other base station 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1445 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1445 may provide an X2 interface within an LTE/LTE-A wireless communication network technology to provide communication between base stations 105.
  • the code 1435 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 1435 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 1435 may not be directly executable by the processor 1440 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 15 shows a flowchart illustrating a method 1500 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the operations of method 1500 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1500 may be performed by a communications manager as described with reference to FIGs. 7 through 10.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may identify that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel.
  • the operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a schedule identifier as described with reference to FIGs. 7 through 10.
  • the UE may determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof.
  • the operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed by a reference duration component as described with reference to FIGs. 7 through 10.
  • the UE may identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the determined reference duration.
  • the operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed by a conflict identifier as described with reference to FIGs. 7 through 10.
  • the UE may transmit, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed by a communication interface as described with reference to FIGs. 7 through 10.
  • FIG. 16 shows a flowchart illustrating a method 1600 that supports determining priorities for overlapping channels in accordance with aspects of the present disclosure.
  • the operations of method 1600 may be implemented by a base station 105 or its components as described herein.
  • the operations of method 1600 may be performed by a communications manager as described with reference to FIGs. 11 through 14.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.
  • the base station may identify that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel.
  • the operations of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be performed by a schedule identifier as described with reference to FIGs. 11 through 14.
  • the base station may determine a reference duration associated with the resources of the second uplink channel, where the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof.
  • the operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed by a reference duration component as described with reference to FIGs. 11 through 14.
  • the base station may identify a conflict between the resources of the first uplink channel and the resources of the second uplink channel based on the reference duration.
  • the operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be performed by a conflict identifier as described with reference to FIGs. 11 through 14.
  • the base station may receive, based on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • the operations of 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of 1620 may be performed by a communication interface as described with reference to FIGs. 11 through 14.
  • a method for wireless communications at a UE comprising: identifying that a first uplink message is scheduled for transmission on resources of a first uplink channel and a second uplink message is scheduled for transmission on resources of a second uplink channel; determining a reference duration associated with the resources of the second uplink channel, wherein the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof; identifying a conflict between the resources of the first uplink channel and the resources of the second uplink channel based at least in part on the determined reference duration; and transmitting, based at least in part on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • Aspect 2 The method of aspect 1, further comprising: identifying a duration of a gap between the resources of the first uplink channel and the resources of the second uplink channel.
  • Aspect 3 The method of aspect 2, further comprising: comparing the reference duration with the duration of the gap between the resources of the first uplink channel and the resources of the second uplink channel, wherein the conflict is identified based at least in part on the comparing.
  • Aspect 4 The method of aspect 3, wherein the reference duration comprises a maximum duration of a cyclic prefix extension that the UE is allowed to transmit.
  • Aspect 5 The method of aspect 3, wherein the reference duration is zero and the conflict is identified based at least in part on the resources of the second uplink channel overlapping with the resources of the first uplink channel.
  • Aspect 6 The method of any of aspects 1 through 5, wherein transmitting one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel comprises: transmitting both the first uplink message and the second uplink message on the resources of the second uplink channel.
  • Aspect 7 The method of aspect 6, wherein the first uplink message comprises uplink control information.
  • Aspect 8 The method of any of aspects 1 through 7, wherein transmitting one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel comprises: transmitting both the first uplink message and the second uplink message on the resources of the first uplink channel.
  • Aspect 9 The method of aspect 8, wherein the second uplink message comprises uplink control information.
  • Aspect 10 The method of any of aspects 1 through 9, wherein transmitting one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel comprises: refraining from transmitting on the other one of the resources of the first uplink channel or the resources of the second uplink channel based at least in part on the priority.
  • Aspect 11 The method of any of aspects 1 through 10, further comprising: receiving downlink control information scheduling the resources of the first uplink channel or the resources of the second uplink channel, wherein the downlink control information indicates the cyclic prefix extension value and the reference duration comprises the cyclic prefix extension value.
  • Aspect 12 The method of any of aspects 1 through 11, further comprising: receiving a radio resource control signal including a configured grant allocating the resources of the first uplink channel, or the second uplink channel, or both, wherein the reference duration is identified based at least in part on the configured grant.
  • Aspect 13 The method of aspect 12, wherein the reference duration is a maximum cyclic prefix extension that the UE is allowed to transmit or zero based at least in part on the configured grant.
  • Aspect 14 The method of aspect 13, wherein the configured grant allocates a subset of a subband for the resources of the first uplink channel or the resources of the second uplink channel, wherein the reference duration is the maximum cyclic prefix extension allowed to transmit by the UE or zero based at least in part on the configured grant allocating the subset of the subband.
  • Aspect 15 The method of any of aspects 12 through 13, further comprising: determining a duration of a cyclic prefix extension based at least in part on the configured grant allocating a full subband, wherein the reference duration comprises the determined duration of the cyclic prefix extension.
  • Aspect 16 The method of any of aspects 1 through 15, further comprising: receiving a radio resource control signal including a first indication of the reference duration to use when the resources of the second uplink channel are allocated via configured grant and a second indication of the reference duration to use when the resources of the second uplink channel are scheduled according to downlink control information.
  • Aspect 17 The method of any of aspects 1 through 16, wherein the reference duration is determined based on whether a duration of a cyclic prefix extension is determined by the UE or indicated by a base station.
  • Aspect 18 The method of any of aspects 1 through 17, wherein the first uplink channel comprises a first of a physical uplink control channel or a physical uplink shared channel and the second uplink channel comprises a second of the physical uplink control channel or the physical uplink shared channel.
  • Aspect 19 The method of any of aspects 1 through 18, wherein one of the first uplink message or the second uplink message comprises a reference signal.
  • a method for wireless communications at a base station comprising: identifying that a first uplink message is scheduled for transmission by a UE on resources of a first uplink channel and a second uplink message is scheduled for transmission by the UE on resources of a second uplink channel; determining a reference duration associated with the resources of the second uplink channel, wherein the reference duration is of a cyclic prefix extension value, or a timing advance value, or a combination thereof; identifying a conflict between the resources of the first uplink channel and the resources of the second uplink channel based at least in part on the reference duration; and receiving, based at least in part on the identified conflict, one of the first uplink message on the resources of the first uplink channel or the second uplink message on the resources of the second uplink channel according to a priority between the first uplink message and the second uplink message.
  • Aspect 21 The method of aspect 20, further comprising: identifying a duration of a gap between the resources of the first uplink channel and the resources of the second uplink channel.
  • Aspect 22 The method of aspect 21, further comprising: comparing the reference duration with the duration of the gap between the resources of the first uplink channel and the resources of the second uplink channel, wherein the conflict is identified based at least in part on the comparing.
  • Aspect 23 The method of aspect 22, wherein the reference duration comprises a maximum duration of a cyclic prefix extension that the UE is allowed to transmit.
  • Aspect 24 The method of aspect 22, wherein the reference duration is zero and the conflict is identified based at least on part on the resources of the second uplink channel overlapping with the resources of the first uplink channel.
  • Aspect 25 An apparatus for wireless communications at a UE comprising a processor and memory coupled to the processor, the processor and memory configured to perform a method of any of aspects 1 through 19.
  • Aspect 26 An apparatus for wireless communications at a UE comprising at least one means for performing a method of any of aspects 1 through 19.
  • Aspect 27 A non-transitory computer-readable medium storing code for wireless communications at a UE the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 19.
  • Aspect 28 An apparatus for wireless communications at a base station comprising a processor and memory coupled to the processor, the processor and memory configured to perform a method of any of aspects 20 through 24.
  • Aspect 29 An apparatus for wireless communications at a base station comprising at least one means for performing a method of any of aspects 20 through 24.
  • Aspect 30 A non-transitory computer-readable medium storing code for wireless communications at a base station the code comprising instructions executable by a processor to perform a method of any of aspects 20 through 24.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special purpose computer.
  • non-transitory computer-readable media may include random- access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium.
  • RAM random- access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • flash memory compact disk (CD) ROM or other optical disk storage
  • CD compact disk
  • magnetic disk storage or other magnetic storage devices or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.
  • example used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.”
  • detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

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Abstract

L'invention concerne des procédés, des systèmes et des dispositifs de communication sans fil. Un équipement utilisateur (UE) et/ou une station de base peut identifier une durée de référence qui peut être comparée à un intervalle entre deux canaux de liaison montante afin de déterminer si les canaux de liaison montante sont en conflit. Dans certains cas, la durée de référence peut être basée sur une durée d'extension de préfixe cyclique, une valeur d'avance temporelle ou les deux. Lorsqu'il est déterminé que deux canaux de liaison montante sont en conflit d'après la durée de référence, l'UE peut transmettre un ou plusieurs messages sur l'un des deux canaux de liaison montante en fonction d'une priorité associée aux canaux et/ou aux messages. La durée de référence peut être une durée convenue par l'UE et la station de base, par exemple une durée d'extension de préfixe cyclique maximum (CP) et/ou une durée d'extension de CP minimum. En conséquence, les deux dispositifs peuvent être capables d'identifier le conflit, et de transmettre/recevoir des messages de liaison montante en conséquence.
PCT/US2020/060015 2019-11-15 2020-11-11 Détermination de priorités pour des canaux se chevauchant WO2021096960A1 (fr)

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WO2023133693A1 (fr) * 2022-01-11 2023-07-20 深圳传音控股股份有限公司 Procédé de communication, dispositif de communication et support de stockage
WO2023178694A1 (fr) * 2022-03-25 2023-09-28 Nec Corporation Procédé, dispositif et support lisible par ordinateur destinés aux communications

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