Techniques for transmitting multiple channels in a shared radio frequency spectrum

Abstract

Methods, systems, and devices for multi-channel wireless communication using shared radio frequency spectrum are provided. Before multi-channel transmission, a user equipment (UE) may perform a separate listen-before-talk (LBT) process for each channel. Before performing the LBT process, the UE may identify a set of channels to be used for multi-channel transmission, where the set of channels may include fewer channels compared to the channels allocated or configured for the UE within a time slot. The UE identifies the set of channels based on one or more multiplexing and prioritization processes for uplink communication allocated or configured for the time slot, and determines the uplink channel set after performing the multiplexing and prioritization processes. In some cases, the multiplexing and prioritization processes may include an in-UE multiplexing and prioritization process, an inter-UE multiplexing and prioritization process, or a combination thereof.

Description

Technical Field

[0001] Generally speaking, the following relates to wireless communication, and more specifically, the following relates to techniques for transmitting multiple channels in a shared radio frequency spectrum. Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi-access systems include fourth-generation (4G) systems (e.g., Long-Term Evolution (LTE) systems, enhanced LTE (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems may employ techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multi-access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication for multiple communication devices (which may also be referred to as user equipment (UE)).

[0003] In some deployments, a UE and a base station may communicate using one or more portions of a radio frequency spectrum band (which may be referred to as a channel or a bandwidth part (BWP)). Additionally, in some cases, one or more channels may be in a shared radio frequency spectrum band, where different users may use contention-based access techniques (e.g., using a Listen Before Talk (LBT) procedure) to access the radio frequency spectrum band. In the case where communication uses multiple channels of a shared radio frequency spectrum band, each channel may have a separate LBT procedure. Additionally, in some cases, when the LBT for one channel fails, none of the multiple channels are used for transmission. Therefore, efficient techniques for transmitting multiple channels in a shared radio frequency spectrum would help enhance system operation and efficiency. Summary of the Invention

[0004] The described techniques relate to improved methods, systems, devices, and apparatus for supporting techniques for transmitting multiple channels in a shared radio frequency spectrum. In various aspects, the techniques provide for identifying channels to be used for uplink transmission and then performing a listen-before-talk (LBT) process for each of the identified channels, where the identified channels can be different from all channels assigned or configured for uplink transmission in a time slot. In some cases, the identified channels can include fewer channels compared to the channels assigned or configured to a user equipment (UE), and performing the LBT process on fewer channels can provide a higher likelihood of a successful LBT process and enhance the efficiency of wireless communication. In some cases, the UE can perform one or more multiplexing and prioritization processes for all uplink communications assigned or configured for a time slot and determine a set of uplink channels to be used for uplink transmission. The set of channels can be the same as or different from the assigned or configured channels, and the LBT is performed only on the set of channels. In some cases, the multiplexing and prioritization processes can include in-UE multiplexing and prioritization processes, inter-UE multiplexing and prioritization processes, or a combination thereof.

[0005] A method of wireless communication at a UE is described. The method can include: receiving, from a base station, a resource allocation for a first uplink communication in a first time slot, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is assigned for the first uplink communication; identifying a second uplink communication scheduled for transmission using at least a second radio frequency channel in the shared radio frequency spectrum band in the first time slot; determining a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, the uplink transmission including at least one of the first uplink communication or the second uplink communication, where the set of radio frequency channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication; and performing a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

[0006] A device for wireless communication at a UE is described. The device may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the device to perform the following operations: receive a resource allocation for a first uplink communication in a first time slot from a base station, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; identify a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band; determine a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, the uplink transmission including at least one of the first uplink communication or the second uplink communication, where the set of radio frequency channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication; and perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

[0007] Another device for wireless communication at a UE is described. The device may include units for performing the following operations: receive a resource allocation for a first uplink communication in a first time slot from a base station, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; identify a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band; determine a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, the uplink transmission including at least one of the first uplink communication or the second uplink communication, where the set of radio frequency channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication; and perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

[0008] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code can include instructions executable by a processor to: receive, from a base station, a resource allocation for a first uplink communication in a first time slot, wherein the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; identify a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band; determine a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, the uplink transmission including at least one of the first uplink communication or the second uplink communication, wherein the set of radio frequency channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication; and perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

[0009] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for: determining, based on the listen-before-talk process, that each frequency channel in the set of radio frequency channels in the shared radio frequency spectrum band may be available for transmission in the first time slot; and using the set of radio frequency channels to transmit the uplink transmission in the first time slot. Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for: determining, based on the listen-before-talk process, that one or more frequency channels in the set of radio frequency channels in the shared radio frequency spectrum band are not available for transmission in the first time slot; and deferring the uplink transmission using the set of radio frequency channels.

[0010] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the set of radio frequency channels may be less than all radio frequency channels associated with the first uplink communication and the second uplink communication. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the set of radio frequency channels includes all radio frequency channels associated with the first uplink communication and all radio frequency channels associated with the second uplink communication. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the determination may be based on an in-UE multiplexing and prioritization process, an inter-UE multiplexing and prioritization process, or a combination thereof. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first uplink communication may be an uplink shared channel communication, and the second uplink communication may be an uplink control channel communication.

[0011] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for: multiplexing the uplink control channel communication with the uplink shared channel communication according to the in-UE multiplexing and prioritization process, and wherein the set of radio frequency channels includes at least the first radio frequency channel allocated for the first uplink communication and excludes at least the second radio frequency channel. Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for: prioritizing the uplink control channel communication over the uplink shared channel communication according to the in-UE multiplexing and prioritization process based on the uplink control channel communication being associated with a communication of higher priority compared to the uplink shared channel communication, and wherein the set of radio frequency channels includes at least the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication.

[0012] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for: receiving an indication that different UEs are scheduled to have resources in the first time slot, the resources using at least the first radio frequency channel allocated for the first uplink communication; determining, according to the inter-UE multiplexing and prioritization process, that the different UEs have a higher priority for transmission on the first radio frequency channel compared to the first uplink communication; postponing the first uplink communication based on the determination that the different UEs have the higher priority for transmission on the first radio frequency channel in the first time slot, and wherein the set of radio frequency channels for the listen-before-talk process includes at least the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication.

[0013] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first uplink communication is associated with a first listen-before-talk category, and the second uplink communication is associated with a second listen-before-talk category having a higher priority than the first listen-before-talk category. Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for: prioritizing the second uplink communication over the first uplink communication according to a prioritization process within the UE, based on the second uplink communication being associated with the higher-priority listen-before-talk category, and wherein the set of radio frequency channels includes the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the second listen-before-talk category corresponds to a type 2 channel access procedure within a channel occupancy time (COT) obtained by the base station, and the first listen-before-talk category corresponds to a type 1 channel access procedure outside of the COT obtained by the base station or associated with a random access transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. shows an example of a system for wireless communication supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0015] Figure 2 FIG. shows an example of a portion of a wireless communication system supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0016] Figure 3 FIG. shows an example of channel prioritization for wireless communication supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0017] Figure 4 FIG. shows an example of channel prioritization for wireless communication supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0018] Figure 5 FIG. shows an example of channel prioritization for wireless communication supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0019] Figure 6 FIG. shows an example of channel prioritization for wireless communication supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0020] Figure 7Illustrates an example of a process flow supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0021] Figure 8 and 9 Illustrates a block diagram of an apparatus supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0022] Figure 10 Illustrates a block diagram of a communication manager supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0023] Figure 11 Illustrates a diagram of a system including an apparatus supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure.

[0024] Figures 12 to 15 Illustrates a flowchart depicting a method supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure. Detailed Description

[0025] Aspects of the present disclosure provide techniques for channel selection for a listen-before-talk (LBT) process in a shared radio frequency spectrum band. In some aspects, a base station and a user equipment (UE) may use multi-channel transmission, where two or more radio frequency channels may be used for uplink communication from the UE to the base station, downlink communication from the base station to the UE, or both. Before transmitting using multiple channels, an LBT process is performed for each channel to confirm that a particular channel is available for transmission. In the case where all channels pass the LBT process, multi-channel transmission may proceed, while in the case where one or more channels fail the LBT process, multi-channel transmission may be postponed until a later time slot. According to various aspects, before a multi-channel uplink transmission in a time slot, the UE may determine a set of channels to be used for the uplink transmission and perform LBT only on the channels in that set.

[0026] In some cases, the set of channels can be less than all the channels associated with the uplink transmission in a time slot. For example, a UE can use two channels in a time slot to receive resource allocations for physical uplink shared channel (PUSCH) transmissions, and can also indicate that the UE uses a third channel to send physical uplink control channel (PUCCH) communications in the same time slot. However, the in-UE multiplexing and prioritization process can stipulate that in the case of overlapping PUSCH and PUCCH communications, the PUCCH communications can be multiplexed with the PUSCH communications, and one or more channels associated with the PUSCH resource allocation can be used to send the multiplexed communications. Thus, in such a case, the third channel configured for PUCCH transmission in the time slot is unused. According to the techniques discussed herein, the UE can avoid performing LBT on such an unused channel, which can enhance the likelihood of successful LBT and contribute to enhancing communication efficiency.

[0027] In some cases, a UE can perform the in-UE multiplexing and prioritization process based on the following: the type of data to be sent, the channel access procedures associated with different communications (e.g., type 1 channel access procedure or type 2 channel access procedure, which have different LBT categories), the data priorities associated with different communications (e.g., ultra-reliable low-latency communication (URLLC) can be prioritized over enhanced mobile broadband (eMBB) communication), or any combination thereof. Additionally or alternatively, a first UE can perform an inter-UE multiplexing and prioritization process, where different UEs having data for transmission using one or more channels in a time slot can be identified. In such a case, if the data of the different UE has a higher priority (e.g., URLLC data compared to eMBB data), the first UE can discard the lower-priority communications in the time slot. If the first UE has one or more uplink communications that have channels non-overlapping with the higher-priority data of the different UE, the first UE can perform LBT on the non-overlapping channels.

[0028] Such techniques can provide for an efficient execution of the LBT process in a shared radio frequency spectrum. For example, the techniques discussed herein can be used to advantageously perform LBT only on the channels that will be used for uplink transmission rather than on all the channels having an associated configuration or allocation within a time slot. Thus, a higher likelihood of a successful LBT process can result, and thus the situations where an uplink transmission may need to be deferred to a later time slot can be reduced. Thus, the techniques according to various aspects can allow for enhanced efficiency and reliability in the use of a shared radio frequency spectrum band, which can also reduce communication latency.

[0029] Aspects of the present disclosure are first described in the context of a wireless communication system. Then, various examples of multi-channel transmission and techniques for channel determination are described. Aspects of the present disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to techniques for transmitting multi-channels in a shared radio frequency spectrum.

[0030] Figure 1 FIG. 100 illustrates an example of a wireless communication system 100 that supports techniques for transmitting multi-channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an evolved LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0031] The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100 and may be devices of different forms or have different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110, and the UEs 115 and the base stations 105 may establish one or more communication links 125 within the coverage area 110. The coverage area 110 may be an example of a geographic area within which the base stations 105 and the UEs 115 may support the transmission of signals in accordance with one or more radio access technologies.

[0032] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices of different forms or have different capabilities. Some example UEs 115 are shown in Figure 1 FIG. 11. The UEs 115 described herein are capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network devices), as Figure 1 shown.

[0033] Base station 105 may communicate with the core network 130, communicate with each other, or perform both of the above operations. For example, base station 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). Base station 105 may communicate with each other directly (e.g., directly between base stations 105), indirectly (e.g., via the core network 130), or perform both of the above operations on the backhaul link 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul link 120 may be or include one or more wireless links.

[0034] One or more of the base stations 105 described herein may include or may be referred to by those skilled in the art as a base station transceiver, radio base station, access point, radio transceiver, Node B, evolved Node B (eNB), next-generation Node B or Gigabit Node B (either may be referred to as a gNB), home Node B, home evolved Node B, or other suitable terms.

[0035] UE 115 may include or may be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where "device" may also be referred to as a unit, station, terminal, or client, among other examples. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine type communication (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, and other examples.

[0036] UE 115 described herein is capable of communicating with various types of devices, such as other UEs 115 that may sometimes act as repeaters, as well as base stations 105 and network devices, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as Figure 1 shown.

[0037] UE 115 and base station 105 may wirelessly communicate with each other via one or more communication links 125 on 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 communication link 125. For example, a carrier for communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating operations for the carrier, user data, or other signaling. The wireless communication system 100 may support communication with UE 115 using carrier aggregation or multi-carrier operation. According to a carrier aggregation configuration, UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers.

[0038] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling for coordinating operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be placed according to a channel raster for discovery by UE 115. A carrier may operate in an independent mode, where UE 115 may perform initial acquisition and connection via the carrier, or a carrier may operate in a non-independent mode, where a different carrier (e.g., of the same or a different radio access technology) is used to anchor the connection.

[0039] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from UE 115 to base station 105, or a downlink transmission from base station 105 to UE 115. A carrier may carry downlink or uplink communication (e.g., in FDD mode) or may be configured to carry both downlink and uplink communication (e.g., in TDD mode).

[0040] A carrier can be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth can be referred to as the "system bandwidth" of the carrier or the wireless communication system 100. For example, the carrier bandwidth can be one of multiple determined bandwidths of a carrier for a specific radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) can have a hardware configuration that supports communication on a specific carrier bandwidth or can be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 can include a base station 105 or a UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 can be configured to operate on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0041] The signal waveform transmitted on a carrier can be composed of multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing an MCM technique, a resource element can consist of a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Therefore, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate can be for the UE 115. Wireless communication resources can refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers can further increase the data rate or data integrity for communication with the UE 115.

[0042] One or more numerologies can be supported for a carrier, where a numerology can include a subcarrier spacing (Δf) and a cyclic prefix. A carrier can be divided into one or more BWPs with the same or different numerologies. In some examples, the UE 115 can be configured with multiple BWPs. In some examples, a single BWP for a carrier can be active at a given time, and communication for the UE 115 can be restricted to one or more active BWPs.

[0043] It can be in a basic time unit, which can for example refer to a sampling period of T s = 1 / (Δf max ·N f ) seconds, where Δf maxmay represent the maximum supported subcarrier spacing, and N f may represent a multiple of the maximum supported discrete Fourier transform (DFT) size) to represent a time interval for base station 105 or UE 115. The time intervals of communication resources 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).

[0044] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a plurality of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a plurality of symbol periods (e.g., depending on the length of the cyclic prefix added in front of each symbol period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-slots each containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f number of) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0045] A subframe, time slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of wireless communication system 100 may be dynamically selected (e.g., in units of bursts of shortened TTIs (sTTIs)).

[0046] Physical channels can be multiplexed on a carrier according to various techniques. For example, one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels on a downlink carrier. A control region for a physical control channel (e.g., a control resource set (CORESET)) can be defined by multiple symbol periods and can extend over the system bandwidth of the carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) can be configured for a set of UEs 115. For example, one or more UEs among the UEs 115 can monitor or search a control region for control information according to one or more search space sets, and each search space set can include one or more control channel candidates at one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate can refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space set can include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0047] In some examples, the base station 105 can be movable and, thus, provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network where different types of base stations 105 use the same or different radio access technologies to provide coverage for respective geographic coverage areas 110.

[0048] Some UEs 115 (e.g., MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communication or MTC can include communication from devices integrated with sensors or meters to measure or capture information and relay such information to a central server or application, which utilizes the information or presents the information to a human interacting with the application. Some UEs 115 can be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, device monitoring, healthcare monitoring, wildlife monitoring, climate and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business billing.

[0049] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. The UE 115 can be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication and can 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). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably herein.

[0050] In some examples, the UE 115 is also capable of communicating directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UEs 115 utilizing D2D communication can be within the geographical coverage area 110 of the base station 105. Other UEs 115 in such a group may be outside the geographical coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some examples, groups of UEs 115 communicating via D2D communication can utilize a one-to-many (1:M) system, where each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0051] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these. Vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information related to the V2X system. In some examples, vehicles in a V2X system can communicate with roadside infrastructure (such as a roadside unit), or communicate with the network via one or more network nodes (e.g., base station 105) using vehicle-to-network (V2N) communication, or communicate with both.

[0052] The core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 can be an evolved packet core (EPC) or a 5G core (5GC), which can 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 to or interconnects with an external network (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity can manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for a UE 115 served by a base station 105 associated with the core network 130. User IP packets can be transmitted through the user plane entity, which can provide IP address allocation and other functions. The user plane entity can be connected to a network operator IP service 150. The operator IP service 150 can include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet-switched streaming service.

[0053] Some network devices in the network device (e.g., base station 105) may include sub-components such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with UE 115 via one or more other access network transmission entities, which may be referred to as radio heads, intelligent radio heads, or transmit / receive points (TRPs). Each access network transmission entity 145 may include one or more antenna panels. In some configurations, the 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 combined into a single network device (e.g., base station 105).

[0054] The wireless communication system 100 may operate using one or more frequency bands (generally in the range of 300 megahertz (MHz) to 300 gigahertz (GHz)). Generally, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or the decimeter band because the wavelength range is 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 be sufficient to penetrate structures to serve UEs 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmissions may be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers).

[0055] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ licensed-assisted access (LAA), LTE-unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed frequency band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency spectrum band, devices such as base station 105 and UE 115 may employ carrier sensing for collision detection and avoidance. In some examples, operation in the unlicensed frequency band may be based on a carrier aggregation configuration that combines component carriers operating in a licensed frequency band (e.g., LAA). Operation in the unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer (P2P) transmissions, or device-to-device (D2D) transmissions, among other examples.

[0056] The base station 105 or the 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) communication, or beamforming. The antennas of the base station 105 or the UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having multiple rows and columns of antenna ports that the base station 105 may use to support beamforming for communication with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0057] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., the base station 105, the UE 115) to form or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals transmitted via the antenna elements of an antenna array such that some signals propagating in a particular orientation relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signals transmitted via the antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. The adjustment associated with each of the antenna elements can be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0058] In some cases, UE 115 and base station 105 may operate using shared radio frequency spectrum and use multi-channel transmission. Before transmitting a multi-channel transmission, UE 115 and base station 105 may perform separate LBT procedures for each channel and may initiate transmission according to an all-or-nothing rule, in which all channels will pass LBT before transmission. Thus, if one or more of the channels fails the LBT procedure, the multi-channel transmission is postponed to a later time slot (e.g., based on contention window backoff techniques associated with the failed LBT). In some cases, for uplink multi-channel transmission, UE 115 may determine a set of channels to be used for uplink transmission, where the set of channels may include fewer channels compared to the channels allocated or configured to UE 115 within a time slot. In some cases, UE 115 may perform one or more multiplexing and prioritization procedures for all uplink communications allocated or configured for a time slot and determine the uplink channel set after performing the multiplexing and prioritization procedures, such that the set of channels may be the same as or different from the channels allocated or configured for the time slot. In some cases, the multiplexing and prioritization procedures may include in-UE multiplexing and prioritization procedures, inter-UE multiplexing and prioritization procedures, or a combination thereof.

[0059] Figure 2 An example of a wireless communication system 200 supporting techniques for transmitting multi-channels in shared radio frequency spectrum in accordance with aspects of the present disclosure is shown. In some examples, wireless communication system 200 may implement aspects of wireless communication system 100. Wireless communication system 200 may include base station 105-a and UE 115-a, which may be corresponding examples of base station 105 and UE 115 as described herein.

[0060] UE 115-a and base station 105-a may communicate via downlink carrier 205 and uplink carrier 210. In some cases, carriers 205 and 210 may be the same carrier. In some cases, carriers 205 and 210 may span multiple channels (e.g., multiple 20 MHz channels) used for communication. For example, in some cases, communication using shared radio frequency spectrum may support broadband operation, where an uplink transmission 220 from UE 115-a to base station 105-a may be scheduled to span multiple channels. Due to broadband operation, it may be possible to schedule one uplink transmission (e.g., a PUSCH transmission) on one set of channels while scheduling another uplink transmission (e.g., a PUCCH transmission) on another set of channels. In Figure 2In the example of, base station 105-a may send resource grant or configuration 215 to UE 115-a, which results in two or more communications being scheduled in a particular uplink time slot. Additionally, in cases where different communications are associated with different channels, UE 115-a may have multiple channels associated with each of the scheduled communications.

[0061] In some cases, before transmitting multi-channel uplink transmission 220, UE 115-a may perform a separate LBT process for each channel and may initiate uplink transmission 220 according to an all-or-nothing rule, in which all channels will pass LBT before transmission. Thus, if one or more of these channels fail the LBT process, uplink transmission 220 is postponed to a later time slot (e.g., based on a contention window backoff technique associated with the failed LBT). In some cases, UE 115-a may determine a set of channels to be used for uplink transmission 220, where the set of channels may include fewer channels compared to the channels allocated or configured to UE 115-a within the time slot. For example, UE 115-a may receive an allocation to transmit PUSCH using a first channel and a second channel in a time slot and may also be configured to report HARQ ACK / NACK feedback in PUCCH communication using a third channel in the same time slot.

[0062] In some cases, UE 115-a may perform one or more multiplexing and prioritization processes for all uplink communications allocated or configured for a time slot and determine an uplink channel set after performing the multiplexing and prioritization processes, such that the channel set may be the same as or different from the channels allocated or configured for the time slot. For example, in cases where control information communication for HARQ-ACK feedback and PUSCH communication overlap in a time slot, UE 115-a may multiplex the control information with the PUSCH communication for transmission on the channel allocated for PUSCH. Thus, in such an example, the channel set may correspond to the channel allocated for PUSCH and may not include one or more channels associated with control information transmission. In some cases, the multiplexing and prioritization processes may include in-UE multiplexing and prioritization processes, inter-UE multiplexing and prioritization processes, or a combination thereof. After determining the channel set, UE 115-a may perform LBT on each channel in the channel set before transmitting uplink transmission 220.

[0063] Figure 3An example of channel prioritization 300 is shown that supports techniques for transmitting multiple channels in a shared radio frequency spectrum, in accordance with aspects of the present disclosure. In some examples, channel prioritization 300 may implement aspects of wireless communication system 100 or 200. In this example, a first channel 305, a second channel 310, and a third channel 315 may be associated with uplink communication from a UE (e.g., Figure 1 UE 115 of 1 or 2) during time slot 320.

[0064] In some examples, the UE may receive an uplink grant where PUSCH communication 325 is allocated in time slot 320 for transmission via the first channel 305 and the second channel 310. Additionally, the UE may be instructed to perform PUCCH communication 335 via the third channel 315 during time slot 320. Thus, in this example, the channels scheduled or allocated for time slot 320 - a include a first portion of PUSCH communication 325 - a in the first channel 305, a second portion of PUSCH communication 325 - b in the second channel 310, and PUCCH communication 335 in the third channel 315. As discussed herein, each of the channels 305 to 315 for multi - channel transmission may have an associated LBT, which in this example includes a first LBT 330 - a for the first channel 305, a second LBT 330 - b for the second channel 310, and a third LBT 340 for the third channel 315.

[0065] In some cases, the UE may perform one or more multiplexing and prioritization procedures and identify the determined set of channels for slot 320-b. For example, uplink control information (UCI) multiplexing rules may be applied to transmissions in slot 320. In a case where two PDSCH communications associated with PUCCH communication 335 and PUSCH communication 325 have the same priority, such UCI multiplexing rules may specify multiplexing PUCCH communication 335 with PUSCH communication 325 and transmitting via first channel 305 and second channel 310. Thus, in this example, the determined set of channels for slot 320-b includes multiplexed UCI and PUSCH 350 for transmission via first channel 305 and second channel 310. Thus, even if the UE is scheduled on first channel 305 to third channel 315, after UCI multiplexing within the UE, the UE may only potentially transmit on first channel 305 and second channel 310. According to the techniques discussed herein, the UE may then perform a first LBT 355-a for first channel 305 and a second LBT 355-b for the second channel. No LBT associated with third channel 315 is performed because PUCCH 335 is not actually transmitted on third channel 315, and thus resources associated with performing LBT on third channel 315 are saved, and the likelihood of a successful all-or-nothing LBT is increased because LBT is performed on fewer channels. In other examples such as in Figure 4 the UE-to-UE multiplexing and prioritization procedures may be based on the priorities associated with different uplink communications.

[0066] Figure 4 FIG. shows an example of channel prioritization 400 that supports techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure. In some examples, channel prioritization 400 may implement aspects of wireless communication system 100 or 200. In this example, first channel 405, second channel 410, and third channel 415 may be associated with uplink communications from a UE (e.g., Figure 1 UE 115 of or 2) during slot 420.

[0067] In this example, the UE may receive an uplink grant where PUSCH communication 425 is allocated in slot 420 for transmission via first channel 405 and second channel 410. Additionally, the UE may be instructed of PUCCH communication 435-a via third channel 415 during slot 420. Thus, in this example, associated with Figure 3Similar to the example, the channels scheduled or allocated for time slot 420-a include PUSCH communication 425-a of the first part in the first channel 405, PUSCH communication 425-b of the second part in the second channel 410, and PUCCH communication 435 in the third channel 415. As discussed herein, each of the channels 405 to 415 for multi-channel transmission may have an associated LBT, which in this example includes a first LBT 430-a for the first channel 405, a second LBT 430-b for the second channel 410, and a third LBT 440-a for the third channel 415.

[0068] In this case, the communication associated with PUCCH communication 435-a (e.g., PDSCH communication for which the UCI includes HARQ ACK / NACK information therefor) may have a higher priority compared to PUSCH communication 425. In such a case, the UCI multiplexing and prioritization rules may specify discarding the lower-priority PUSCH communication 425 and transmitting the higher-priority PUCCH communication 435-b, and thus, the determined set of channels for time slot 420-b may include only the third channel 415 associated with PUCCH communication 435-b. Therefore, even if the UE is scheduled on the first channel 405 to the third channel 415, after UCI multiplexing within the UE, the UE may only potentially transmit on the third channel 415. According to the techniques discussed herein, the UE may then perform the LBT 440-b for the third channel 415 before transmitting PUCCH communication 435-b. The LBTs associated with the first channel 405 and the second channel 410 are not performed because no PUSCH communication 425 is actually transmitted, and since the LBT is performed on fewer channels, the likelihood of a successful all-or-nothing LBT is increased. In other examples such as those shown in Figure 4 The UE-to-UE multiplexing and prioritization process may be based on the priorities associated with different uplink communications.

[0069] Although Figure 3 and 4The example discussed UCI multiplexing and prioritization for PUSCH communication, but such techniques can be used with any number of different multiplexing or prioritization that can be applied to uplink communication from a UE or can be applied to UE-to-UE communication (e.g., when different UEs have higher-priority communication, the higher-priority communication can preempt the lower-priority communication of another UE). Thus, in the case of in-UE or UE-to-UE multiplexing and prioritization, the actual set of channels for potential transmission in a time slot can be different from the set of channels listed in the uplink scheduling at the UE. As discussed herein, aspects of the present disclosure provide techniques in which a UE performs an uplink multi-channel channel access procedure (e.g., an LBT procedure) based on a grant after in-UE or UE-to-UE prioritization. Additionally, after in-UE or UE-to-UE prioritization, an all-or-nothing transmission due to an LBT failure is applied to the scheduled channels. However, in other cases, a UE can perform an uplink multi-channel channel access procedure based on a grant before in-UE or UE-to-UE prioritization, where an all-or-nothing transmission due to an LBT failure is applied to the scheduled channels before in-UE or UE-to-UE prioritization. In some cases, a UE can receive configuration information (e.g., via RRC signaling) from a base station that indicates whether to perform LBT before or after an in-UE or UE-to-UE multiplexing and prioritization process. In some cases, the UE multiplexing and prioritization process can be additionally or alternatively based on the type of channel access associated with the uplink communication. Figure 5 and 6 shows two examples of channel determination based on channel access techniques.

[0070] Figure 5 shows an example of channel prioritization 500 that supports techniques for transmitting multi-channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure. In some examples, channel prioritization 500 can implement aspects of wireless communication systems 100 or 200. In this example, a first channel 505, a second channel 510, and a third channel 515 can be associated with uplink communication from a UE (e.g., Figure 1 UE 115 of UE 1 or 2) during a time slot 520.

[0071] In some examples, a UE may receive an uplink grant in which PUSCH communication 525 is allocated in time slot 520 for transmission via a first channel 505 and a second channel 510. Additionally, the UE may be instructed to perform PUCCH communication 535 via a third channel 515 during time slot 520. Thus, in this example, the channels scheduled or allocated for time slot 520-a include a first portion of PUSCH communication 525-a in the first channel 505, a second portion of PUSCH communication 525-b in the second channel 510, and PUCCH communication 535 in the third channel 515. Further, in this example, the first channel 505 and the second channel 510 may be associated with a first type of channel access (e.g., type 1 channel access), which may have a first LBT category (e.g., category 4 LBT 530 with a first contention window duration). Based on the PUCCH communication 535 being within the channel occupancy time (COT) acquired by the base station, the third channel 515 may have a second type of channel access (e.g., type 2 channel access), which may have a second LBT category, such as category 2 LBT 540 (or single LBT) with a second contention window duration shorter than the first contention window duration. In this example, the PUSCH communication 525 may have the same priority as the downlink transmission associated with the PUSCH communication 535, and thus the UCI multiplexing rule may specify carrying the UCI with the PUSCH communication 525.

[0072] In some cases, the UE may first perform in-UE multiplexing and then determine the LBT type based on a set of channels after in-UE multiplexing. In this case, the UE will attempt to transmit the UCI and PUSCH 550 with category 4 LBT555 via the first channel 505 and the second channel 510. In other cases, such as those Figure 6 illustrated in, the UE may prioritize uplink transmissions within a time slot based on the LBT type.

[0073] Figure 6 An example of channel prioritization 600 is shown that supports techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure. In some examples, channel prioritization 600 may implement aspects of a wireless communication system 100 or 200. In this example, a first channel 605, a second channel 610, and a third channel 615 may be associated with uplink communication from a UE (e.g., Figure 1 UE 115 of or 2) during time slot 620.

[0074] In this example, the UE can again receive an uplink grant, where PUSCH communication 625 is allocated in time slot 620 for transmission via a first channel 605 and a second channel 610. Additionally, the UE can be configured for PUCCH communication 635-a via a third channel 615 during time slot 620. Thus, in this example, the channels scheduled or allocated for time slot 620-a include a first portion of PUSCH communication 625-a in the first channel 605, a second portion of PUSCH communication 625-b in the second channel 610, and PUCCH communication 635 in the third channel 615.

[0075] Additionally, in this example, the first channel 605 and the second channel 610 can be associated with a first type of channel access (e.g., type 1 channel access), and the first type of channel access can have a first LBT category (e.g., category 4 LBT 630 with a first contention window duration). Based on the PUCCH communication 635 being within the COT acquired by the base station, the third channel 615 can have a second type of channel access (e.g., type 2 channel access), and the second type of channel access can have a second LBT category, such as category 2 LBT 640 (or single LBT) with a second contention window duration shorter than the first contention window duration. In this example, the PUSCH communication 625 can have the same priority as the downlink transmission associated with the PUCCH communication 635. However, the UCI multiplexing rule can specify that the uplink communication can be prioritized based on the LBT type. Thus, in this example, category 2 LBT 640 can have priority over category 4 LBT 630, and thus the determined channel set for time slot 620-b can include PUCCH communication 635-b, where the PUSCH communication 625 is discarded. The UE can then perform category 2 LBT 640-b before transmitting the PUCCH communication 635-b.

[0076] Figure 7 An example of a process flow 700 is shown that supports techniques for sending multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure. In some examples, the process flow 700 can implement aspects of the wireless communication system 100 or 200. The process flow 700 can be implemented by a UE 115-b and a base station 105-b as described herein. Alternative examples can be implemented, where some steps are performed in a different order than described or not performed at all. In some cases, the steps can include additional features not mentioned below, or additional steps can be added.

[0077] At 705, base station 105-b and UE 115-b may perform a connection establishment procedure (e.g., an RRC connection establishment or re-establishment procedure), where communication via a shared radio frequency spectrum band may be configured.

[0078] At 710, base station 105-b may send configuration information to UE 115-b. In some cases, such configuration may configure UE 115-b to send UCI (e.g., HARQ-ACK feedback) in certain uplink resources after one or more downlink shared channel transmissions. In some cases, the configuration information may include configuration or activation of semi-persistent uplink resources for uplink communication from UE 115-b.

[0079] At 715, base station 105-b may allocate uplink resources for UE 115-b. At 720, the uplink resources may be provided to UE 115-b in a downlink transmission that provides an uplink grant (e.g., in downlink control information (DCI)). In some cases, the uplink grant may provide an allocation of uplink resources for PUSCH communication in a time slot, where the time slot may also include resources configured by the configuration information.

[0080] At 725, UE 115-b may identify a resource allocation based on an uplink grant for a first uplink communication in a time slot. The resource allocation may be indicated in DCI and may provide uplink resources in multiple channels within the time slot. In some cases, the first uplink communication may be associated with a first category of LBT procedure.

[0081] At 730, UE 115-b may identify uplink resources for a second uplink communication in a time slot based on the configuration information. In some cases, the second uplink communication may include uplink control information, and the associated resources may include one or more channels in the time slot that are different from one or more channels associated with the first uplink communication. In some cases, the uplink control information may be associated with a second category of LBT procedure (e.g., based within a COT obtained by base station 105-b).

[0082] At 735, UE 115-b may perform one or more intra-UE and / or inter-UE multiplexing and prioritization procedures to determine a set of channels to be used for uplink transmission to base station 105-b. As discussed herein, the multiplexing and prioritization procedures may be performed based on: the type of data to be transmitted, the priorities associated with different uplink communications, the channel access category type or LBT category for uplink communications, or any combination thereof. Based on the determined set of channels, UE 115-a may perform one or more LBT procedures for each channel in the set of channels.

[0083] At 740, UE 115-b may determine whether LBT passes on each channel in the set of channels according to an all-or-nothing rule for multi-channel transmission. At 745, based on determining that LBT passes for each channel, UE 115-b may use the determined set of channels to send an uplink transmission to base station 105-b.

[0084] Figure 8 Block diagram 800 illustrates a device 805 that supports techniques for transmitting multiple channels in a shared radio frequency spectrum, in accordance with aspects of the present disclosure. Device 805 may be an example of aspects of UE 115 as described herein. Device 805 may include a receiver 810, a communication manager 815, and a transmitter 820. Device 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0085] 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 techniques for transmitting multiple channels in a shared radio frequency spectrum, etc.). The information may be passed to other components of device 805. Receiver 810 may be an example of aspects of transceiver 1120 described Figure 11 herein. Receiver 810 may utilize a single antenna or a set of antennas.

[0086] The communication manager 815 may perform the following operations: receive a resource allocation for a first uplink communication in a first time slot from a base station, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; identify a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band; determine a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, where the uplink transmission includes at least one of the first uplink communication or the second uplink communication, and where the set of radio frequency channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication; and perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band. The communication manager 815 may be an example of aspects of the communication manager 1110 described herein.

[0087] The communication manager 815 as described herein may be implemented to realize one or more potential advantages. One implementation may allow the device 805 to perform LBT on fewer channels that are actually used for uplink transmission, which may allow for an increased likelihood of successful LBT. Additionally, implementations may also allow the device 805 to reduce the latency of communication, and increase signaling reliability, throughput, and user experience, while reducing power consumption, among other advantages.

[0088] The communication manager 815 or its sub-components may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 815 or its sub-components may be performed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), an 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 this disclosure.

[0089] The communication manager 815 or its sub-components may be physically located at various positions, including being distributed such that portions of the functions are implemented by one or more physical components at different physical locations. In some examples, in accordance with aspects of this disclosure, the communication manager 815 or its sub-components may be separate and distinct components. In some examples, in accordance with aspects of this disclosure, the communication manager 815 or its sub-components may be combined with one or more other hardware components (including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or a combination thereof).

[0090] Transmitter 820 may send signals generated by other components of device 805. In some examples, transmitter 820 may be co-located with receiver 810 in a transceiver module. For example, transmitter 820 may be an example of aspects of transceiver 1120 described with reference to Figure 11 Transmitter 820 may utilize a single antenna or a set of antennas.

[0091] Figure 9 Block diagram 900 of a device 905 supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure is shown. Device 905 may be an example of aspects of device 805 or UE 115 described herein. Device 905 may include a receiver 910, a communication manager 915, and a transmitter 935. Device 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0092] Receiver 910 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 techniques for transmitting multiple channels in a shared radio frequency spectrum, etc.). The information may be passed to other components of device 905. Receiver 910 may be an example of aspects of transceiver 1120 described with reference to Figure 11 Receiver 910 may utilize a single antenna or a set of antennas.

[0093] Communication manager 915 may be an example of aspects of communication manager 815 described herein. Communication manager 915 may include a scheduling manager 920, an RF channel manager 925, and an LBT manager 930. Communication manager 915 may be an example of aspects of communication manager 1110 described herein.

[0094] Scheduling manager 920 may receive a resource allocation for a first uplink communication in a first time slot from a base station, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; and identify a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band.

[0095] RF channel manager 925 may determine a set of radio frequency channels in the shared radio frequency spectrum band to be used for an uplink transmission in a first time slot, the uplink transmission including at least one of the first uplink communication or the second uplink communication, where the set of radio frequency channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication.

[0096] The LBT manager 930 may perform a listen-before-talk process to access a set of RF channels in a shared RF spectrum band.

[0097] The transmitter 935 may send signals generated by other components of the device 905. In some examples, the transmitter 935 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 935 may be an example of aspects of the transceiver 1120 described with reference to Figure 11 The transmitter 935 may utilize a single antenna or a group of antennas.

[0098] Figure 10 FIG. 1000 is a block diagram of a communication manager 1005 that supports techniques for transmitting multiple channels in a shared RF spectrum in accordance with aspects of the present disclosure. The communication manager 1005 may be an example of aspects of the communication manager 815, the communication manager 915, or the communication manager 1110 described herein. The communication manager 1005 may include a scheduling manager 1010, an RF channel manager 1015, an LBT manager 1020, and a multiplexing and prioritization manager 1025. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0099] The scheduling manager 1010 may receive a resource allocation for a first uplink communication in a first time slot from a base station, where the resource allocation indicates that at least a first RF channel in a shared RF spectrum band is allocated for the first uplink communication. In some examples, the scheduling manager 1010 may identify a second uplink communication scheduled for transmission in the first time slot using at least a second RF channel in the shared RF spectrum band.

[0100] In some examples, the scheduling manager 1010 may receive an indication that different UEs are scheduled to have resources in the first time slot, where the resources use at least the first RF channel allocated for the first uplink communication. In some examples, the scheduling manager 1010 may determine, based on a UE - to - UE multiplexing and prioritization process, that the different UE has a higher priority for transmission on the first RF channel compared to the first uplink communication. In some examples, the set of RF channels for the listen - before - talk process includes at least the second RF channel and excludes at least the first RF channel allocated for the first uplink communication.

[0101] In some examples, the scheduling manager 1010 may defer the first uplink communication based on determining that a different UE has a higher priority for transmission on the first RF channel in the first time slot.

[0102] The RF channel manager 1015 may determine a set of RF channels in a shared RF spectrum band to be used for uplink transmissions in a first time slot, where the uplink transmissions include at least one of a first uplink communication or a second uplink communication, and where the set of RF channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication.

[0103] In some cases, the set of RF channels is less than all of the RF channels associated with the first uplink communication and the second uplink communication. In some cases, the set of RF channels includes all of the RF channels associated with the first uplink communication and all of the RF channels associated with the second uplink communication.

[0104] The LBT manager 1020 may perform a listen-before-talk process to access the set of RF channels in the shared RF spectrum band. In some examples, the LBT manager 1020 may determine, based on the listen-before-talk process, that each frequency channel in the set of RF channels in the shared RF spectrum band is available for transmission in the first time slot.

[0105] In some examples, the LBT manager 1020 may use the set of RF channels to send an uplink transmission in the first time slot.

[0106] In some examples, the LBT manager 1020 may determine, based on the listen-before-talk process, that one or more frequency channels in the set of RF channels in the shared RF spectrum band are not available for transmission in the first time slot. In some examples, the LBT manager 1020 may defer the uplink transmission using the set of RF channels.

[0107] In some cases, the first uplink communication is associated with a first listen-before-talk category, and the second uplink communication is associated with a second listen-before-talk category, where the second listen-before-talk category has a higher priority compared to the first listen-before-talk category. In some cases, the second listen-before-talk category corresponds to a type 2 channel access process within a channel occupancy time (COT) acquired by a base station, and the first listen-before-talk category corresponds to a type 1 channel access process outside of the COT acquired by the base station or associated with a random access transmission.

[0108] The multiplexing and prioritization manager 1025 may multiplex uplink control channel communications with uplink shared channel communications according to an in-UE multiplexing and prioritization process. In some examples, the set of RF channels includes at least a first RF channel assigned for the first uplink communication and excludes at least a second RF channel.

[0109] In some examples, the multiplexing and prioritization manager 1025 may cause uplink control channel communications to be prioritized over uplink shared channel communications according to the in-UE multiplexing and prioritization process, based on the uplink control channel communications being associated with a higher priority than the uplink shared channel communications. In some examples, the set of radio frequency channels includes at least a second radio frequency channel and excludes at least a first radio frequency channel that is allocated for a first uplink communication.

[0110] In some examples, the multiplexing and prioritization manager 1025 may cause a second uplink communication to be prioritized over a first uplink communication according to the in-UE prioritization process, based on the second uplink communication being associated with a higher priority listen-before-talk category. In some examples, the set of radio frequency channels includes a second radio frequency channel and excludes at least a first radio frequency channel that is allocated for a first uplink communication.

[0111] In some cases, the determination is based on the in-UE multiplexing and prioritization process, the inter-UE multiplexing and prioritization process, or a combination thereof. In some cases, the first uplink communication is an uplink shared channel communication and the second uplink communication is an uplink control channel communication.

[0112] Figure 11 FIG. shows a system 1100 including an apparatus 1105 that supports techniques for transmitting multiple channels in a shared radio frequency spectrum, in accordance with aspects of the present disclosure. The apparatus 1105 may be an example of, or include components of, the apparatus 805, the apparatus 905, or the UE 115 as described herein. The apparatus 1105 may include components for two-way voice and data communication, including components for sending and receiving communications, including a communication manager 1110, an I / O controller 1115, a transceiver 1120, an antenna 1125, a memory 1130, and a processor 1140. These components may communicate electronically via one or more buses (e.g., bus 1145).

[0113] The communication manager 1110 may perform the following operations: receive a resource allocation for a first uplink communication in a first time slot from a base station, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; identify a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band; determine a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, where the uplink transmission includes at least one of the first uplink communication or the second uplink communication, and where the set of radio frequency channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication; and perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

[0114] The communication manager 1110 as described herein may be implemented to achieve one or more potential advantages. One implementation may allow the device 1105 to perform LBT on fewer channels that are actually used for uplink transmission, which may allow for an increased likelihood of successful LBT. Additionally, implementations may allow the device 1105 to reduce communication latency, and increase signaling reliability, throughput, and user experience, while reducing power consumption, among other advantages.

[0115] The I / O controller 1115 may manage input and output signals for the device 1105. The I / O controller 1115 may also manage peripheral devices not integrated into the device 1105. In some cases, the I / O controller 1115 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 1115 may utilize an operating system such as or another known operating system. In other cases, the I / O controller 1115 may represent a modem, keyboard, mouse, touch screen, or similar device or interact with the above devices. In some cases, the I / O controller 1115 may be implemented as part of a processor. In some cases, a user may interact with the device 1105 via the I / O controller 1115 or via a hardware component controlled by the I / O controller 1115.

[0116] The transceiver 1120 may communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 1120 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1120 may also include a modem for modulating packets and providing the modulated packets to an antenna for transmission, and for demodulating packets received from the antenna.

[0117] In some cases, a wireless device may include a single antenna 1125. However, in some cases, the device may have more than one antenna 1125 that can simultaneously transmit or receive multiple wireless transmissions.

[0118] The memory 1130 may include RAM and ROM. The memory 1130 may store computer-readable, computer-executable code 1135 that includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, in addition, the memory 1130 may also contain a BIOS that may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0119] The processor 1140 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, microcontroller, ASIC, FPGA, programmable logic device, discrete gate or transistor logic component, discrete hardware component, or any combination thereof). In some cases, the processor 1140 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1140. The processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1130) to cause the device 1105 to perform various functions (e.g., functions or tasks that support techniques for transmitting multiple channels in a shared radio frequency spectrum).

[0120] The code 1135 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. The code 1135 may be stored on a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, the code 1135 may not be directly executable by the processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0121] Figure 12 A flowchart illustrating a method 1200 for supporting techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure is shown. The operations of method 1200 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 1200 may be performed by a communication manager as described with reference to Figures 8 to 11 described. In some examples, the UE may execute an instruction set to control functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

[0122] At 1205, the UE may receive from the base station a resource allocation for a first uplink communication in a first time slot, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication. The operation at 1205 may be performed according to the methods described herein. In some examples, aspects of the operation at 1205 may be performed by a scheduling manager as described with reference to Figures 8 to 11 described.

[0123] At 1210, the UE may identify a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band. The operation at 1210 may be performed according to the methods described herein. In some examples, aspects of the operation at 1210 may be performed by a scheduling manager as described with reference to Figures 8 to 11 described.

[0124] At 1215, the UE may determine a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, where the uplink transmission includes at least one of the first uplink communication or the second uplink communication, and where the set of radio frequency channels is based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication. The operation at 1215 may be performed according to the methods described herein. In some examples, aspects of the operation at 1215 may be performed by an RF channel manager as described with reference to Figures 8 to 11 described.

[0125] At 1220, the UE may perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band. The operation at 1220 may be performed according to the methods described herein. In some examples, aspects of the operation at 1220 may be performed by an LBT manager as described with reference to Figures 8 to 11 described.

[0126] Optionally, at 1225, the UE may determine whether the listen-before-talk process is successful for all radio frequency channels in the set of radio frequency channels. The operation at 1225 may be performed according to the methods described herein. In some examples, aspects of the operation at 1225 may be performed by an LBT manager as described with reference to Figures 8 to 11 described.

[0127] Optionally, at 1230, if it is determined at 1225 that the LBT is successful for all radio frequency channels in the set of radio frequency channels, the UE may transmit an uplink transmission in the first time slot using the set of radio frequency channels. The operation at 1230 may be performed according to the methods described herein. In some examples, aspects of the operation at 1230 may be performed by an LBT manager as described with reference to Figures 8 to 11 described.

[0128] Optionally, at 1235, if it is determined at 1225 that the LBT is not successful for all radio frequency channels in the radio frequency channel set (i.e., the LBT fails on one or more of these channels), the UE may defer the uplink transmission using the radio frequency channel set. The operation of 1240 may be performed according to the methods described herein. In some examples, aspects of the operation of 1240 may be performed by an LBT manager as described with reference to Figures 8 to 11 the description.

[0129] Figure 13 A flowchart illustrating a method 1300 that supports techniques for transmitting multiple channels in a shared radio frequency spectrum in accordance with aspects of the present disclosure is shown. The operations of method 1300 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of method 1300 may be performed by a communication manager as described with reference to Figures 8 to 11 the description. In some examples, the UE may execute an instruction set to control functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

[0130] At 1305, the UE may receive a resource allocation for a first uplink communication in a first time slot, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication. The operation of 1305 may be performed according to the methods described herein. In some examples, aspects of the operation of 1305 may be performed by a scheduling manager as described with reference to Figures 8 to 11 the description.

[0131] At 1310, the UE may identify a second uplink communication scheduled for transmission using at least a second radio frequency channel in the shared radio frequency spectrum band in the first time slot. The operation of 1310 may be performed according to the methods described herein. In some examples, aspects of the operation of 1310 may be performed by a scheduling manager as described with reference to Figures 8 to 11 the description. In some cases, the first uplink communication is an uplink shared channel communication, and the second uplink communication is an uplink control channel communication.

[0132] At 1315, the UE may multiplex the uplink control channel communication with the uplink shared channel communication according to an in-UE multiplexing and prioritization process. The operation of 1315 may be performed according to the methods described herein. In some examples, aspects of the operation of 1315 may be performed by a multiplexing and prioritization manager as described with reference to Figures 8 to 11 the description.

[0133] At 1320, the UE may determine a set of radio frequency channels in a shared radio frequency spectrum band to be used for uplink transmission in a first time slot, where the uplink transmission includes multiplexed communications, and where the set of radio frequency channels excludes a second radio frequency channel. The operations at 1320 may be performed according to the methods described herein. In some examples, aspects of the operations at 1320 may be performed by an RF channel manager as described with reference to Figures 8 to 11 described.

[0134] At 1325, the UE may perform a listen-before-talk procedure to access the set of radio frequency channels in the shared radio frequency spectrum band. The operations at 1325 may be performed according to the methods described herein. In some examples, aspects of the operations at 1325 may be performed by an LBT manager as described with reference to Figures 8 to 11 described.

[0135] Figure 14 FIG. shows a flow diagram of a method 1400 that illustrates techniques for supporting multi-channel transmission in a shared radio frequency spectrum in accordance with aspects of the present disclosure. The operations of method 1400 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of method 1400 may be performed by a communication manager as described with reference to Figures 8 to 11 described. In some examples, the UE may execute an instruction set to control functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

[0136] At 1405, the UE may receive a resource allocation for a first uplink communication in a first time slot, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication. The operations at 1405 may be performed according to the methods described herein. In some examples, aspects of the operations at 1405 may be performed by a scheduling manager as described with reference to Figures 8 to 11 described.

[0137] At 1410, the UE may identify a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band. The operations at 1410 may be performed according to the methods described herein. In some examples, aspects of the operations at 1410 may be performed by a scheduling manager as described with reference to Figures 8 to 11 described. In some cases, the first uplink communication is an uplink shared channel communication and the second uplink communication is an uplink control channel communication.

[0138] At 1415, the UE can prioritize uplink control channel communication over uplink shared channel communication according to the in-UE multiplexing and prioritization process, based on the uplink control channel communication being associated with a higher-priority communication compared to uplink shared channel communication. The operations at 1415 can be performed according to the methods described herein. In some examples, aspects of the operations at 1415 can be performed by a multiplexing and prioritization manager as described with reference to Figures 8 to 11 described.

[0139] At 1420, the UE can determine a set of radio frequency channels in a shared radio frequency spectrum band to be used for uplink transmission in a first time slot, at least in part based on the in-UE multiplexing and prioritization process, where, based on the uplink control channel communication being associated with a higher-priority communication, the set of radio frequency channels includes at least a second radio frequency channel and excludes at least a first radio frequency channel. The operations at 1420 can be performed according to the methods described herein. In some examples, aspects of the operations at 1420 can be performed by an RF channel manager as described with reference to Figures 8 to 11 described.

[0140] At 1425, the UE can perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band. The operations at 1425 can be performed according to the methods described herein. In some examples, aspects of the operations at 1425 can be performed by an LBT manager as described with reference to Figures 8 to 11 described.

[0141] Figure 15 FIG. shows a flowchart of a method 1500 that illustrates techniques for supporting multi-channel transmission in a shared radio frequency spectrum in accordance with aspects of the present disclosure. The operations of method 1500 can be implemented by a UE 115 or its components as described herein. For example, the operations of method 1500 can be performed by a communication manager as described with reference to Figures 8 to 11 described. In some examples, the UE can execute an instruction set to control the functional units of the UE to perform the functions described below. Additionally or alternatively, the UE can use dedicated hardware to perform aspects of the functions described below.

[0142] At 1505, the UE can receive a resource allocation for a first uplink communication in a first time slot, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication. The operations at 1505 can be performed according to the methods described herein. In some examples, aspects of the operations at 1505 can be performed by a scheduling manager as described with reference to Figures 8 to 11 described.

[0143] At 1510, the UE may identify a second uplink communication scheduled for transmission in a first time slot using at least a second radio frequency channel in a shared radio frequency spectrum band, where the first uplink communication is associated with a first LBT category and the second uplink communication is associated with a second LBT category, and the second LBT category has a higher priority than the first LBT category. The operations at 1510 may be performed according to the methods described herein. In some examples, aspects of the operations at 1510 may be performed by a scheduling manager as described with reference to Figures 8 to 11 described.

[0144] At 1515, based on the second uplink communication being associated with a higher priority listen-before-talk category, the UE may prioritize the second uplink communication over the first uplink communication according to an in-UE prioritization process. The operations at 1515 may be performed according to the methods described herein. In some examples, aspects of the operations at 1515 may be performed by a multiplexing and prioritization manager as described with reference to Figures 8 to 11 described.

[0145] At 1520, the UE may determine, based on an in-UE multiplexing and prioritization process, a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, where the set of radio frequency channels includes the second radio frequency channel and excludes at least the first radio frequency channel. The operations at 1520 may be performed according to the methods described herein. In some examples, aspects of the operations at 1520 may be performed by an RF channel manager as described with reference to Figures 8 to 11 described.

[0146] At 1525, the UE may perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band. The operations at 1525 may be performed according to the methods described herein. In some examples, aspects of the operations at 1525 may be performed by an LBT manager as described with reference to Figures 8 to 11 described.

[0147] It should be noted that the methods described herein describe possible implementations, and the operations and steps may be rearranged or otherwise modified, and other implementations are possible. Additionally, aspects from two or more methods may be combined.

[0148] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for purposes of example, and the LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond the scope of LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to a variety of other wireless communication 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, and other systems and radio technologies not explicitly mentioned herein.

[0149] The information and signals described herein can be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0150] Various illustrative blocks and components described in connection with the disclosure herein can be implemented or performed using a general purpose processor, DSP, ASIC, CPU, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The 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).

[0151] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these items. The features implementing the functions can also be physically located at various positions, including being distributed such that portions of the functions are implemented at different physical locations.

[0152] A computer-readable medium includes both a non-transitory computer storage medium and a communication medium, where the communication medium includes any medium that facilitates transfer of a computer program from one place to another. The non-transitory storage medium can be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include random access memory (RAM), read only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code units in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer, or a general purpose or special purpose processor. Additionally, any connection is properly termed a computer-readable medium. For example, if software is transmitted using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable medium.

[0153] As used herein (including in the claims), the "or" as used in a list of items (e.g., a list that ends with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such that a list of, for example, at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Additionally, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, without departing from the scope of the present disclosure, an example step described as "based on condition A" can be based on both condition A and condition B. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0154] In the figures, similar components or features may have the same reference numeral. Additionally, various components of the same type can be distinguished by following the reference numeral with a dash and a second numeral, which is used to differentiate among similar components. If only the first reference numeral is used in the specification, the description applies to any one of the similar components having the same first reference numeral, regardless of the second reference numeral or any other subsequent reference numerals.

[0155] The description set forth herein with reference to the accompanying drawings describes example configurations and does not represent all examples that may be implemented or that are within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and not "preferred" or "advantageous over other examples." For the purpose of providing an understanding of the described technology, the detailed description includes specific details. However, the technology may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0156] This description is provided to enable a person skilled in the art to make or use the present disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the present disclosure is not limited to the examples and designs described herein but is accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: Receiving, from a base station, a resource allocation for a first uplink communication in a first time slot, wherein the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; Identifying a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band; Determining, at least in part, based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication, a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, the uplink transmission including at least one of the first uplink communication and the second uplink communication, wherein the set of radio frequency channels is less than all channels allocated for the first time slot; and Performing a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

2. The method according to claim 1, further comprising: Determining, at least in part, based on the listen-before-talk process, that each frequency channel in the set of radio frequency channels in the shared radio frequency spectrum band is available for transmission in the first time slot; And Using the set of radio frequency channels to send the uplink transmission in the first time slot.

3. The method according to claim 1, further comprising: Determining, at least in part, based on the listen-before-talk process, that one or more frequency channels in the set of radio frequency channels in the shared radio frequency spectrum band are not available for transmission in the first time slot; And Postponing the uplink transmission using the set of radio frequency channels.

4. The method according to claim 1, wherein The set of radio frequency channels is less than all radio frequency channels associated with the first uplink communication and the second uplink communication.

5. The method according to claim 1, wherein The set of radio frequency channels includes all radio frequency channels associated with the first uplink communication and all radio frequency channels associated with the second uplink communication.

6. The method according to claim 1, wherein, The determination is at least in part based on an in-UE multiplexing and prioritization process, an inter-UE multiplexing and prioritization process, or a combination thereof.

7. The method according to claim 6, wherein The first uplink communication is an uplink shared channel communication, and the second uplink communication is an uplink control channel communication.

8. The method according to claim 7, further comprising: Multiplexing the uplink control channel communication with the uplink shared channel communication according to the in-UE multiplexing and prioritization process; And Wherein the set of radio frequency channels includes at least the first radio frequency channel allocated for the first uplink communication and excludes at least the second radio frequency channel.

9. The method according to claim 7, further comprising: Prioritizing the uplink control channel communication over the uplink shared channel communication according to the in-UE multiplexing and prioritization process, at least in part based on the uplink control channel communication being associated with a communication of a higher priority compared to the uplink shared channel communication; And Wherein, the set of radio frequency channels includes at least the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication.

10. The method according to claim 6, further comprising: Receiving an indication that different UEs are scheduled to have resources in the first time slot, where the resources use at least the first radio frequency channel allocated for the first uplink communication; Determining, according to the inter-UE multiplexing and prioritization process, that the different UEs have a higher priority for transmission on the first radio frequency channel compared to the first uplink communication; Postponing the first uplink communication at least partially based on determining that the different UEs have the higher priority for transmission on the first radio frequency channel in the first time slot; And Wherein, the set of radio frequency channels for the listen-before-talk process includes at least the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication.

11. The method according to claim 1, wherein, The first uplink communication is associated with a first listen-before-talk category, and the second uplink communication is associated with a second listen-before-talk category, and the second listen-before-talk category has a higher priority compared to the first listen-before-talk category.

12. The method according to claim 11, further comprising: Making the second uplink communication prior to the first uplink communication according to an intra-UE prioritization process at least partially based on the second uplink communication being associated with the higher-priority listen-before-talk category; And Wherein, the set of radio frequency channels includes the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication.

13. The method according to claim 12, wherein, The second listen-before-talk category corresponds to a type 2 channel access process within a channel occupancy time (COT) obtained by the base station, and the first listen-before-talk category corresponds to a type 1 channel access process outside the COT obtained by the base station or associated with a random access transmission.

14. An apparatus for wireless communication at a user equipment (UE), comprising: A processor; A memory coupled to the processor; And Instructions stored in the memory and executable by the processor to cause the apparatus to perform the following operations: Receiving, from a base station, a resource allocation for a first uplink communication in a first time slot, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; Identifying a second uplink communication scheduled for transmission in the first time slot using at least a second radio frequency channel in the shared radio frequency spectrum band; Determine a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, at least in part based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication, where the uplink transmission includes at least one of the first uplink communication and the second uplink communication, and where the set of radio frequency channels is less than all channels allocated for the first time slot; and Perform a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

15. The apparatus according to claim 14, wherein, The instructions may further be executed by the processor to cause the device to perform the following operations: Determine that each frequency channel in the set of radio frequency channels in the shared radio frequency spectrum band is available for transmission in the first time slot, at least in part based on the listen-before-talk process; And Transmit the uplink transmission in the first time slot using the set of radio frequency channels.

16. The apparatus according to claim 14, wherein, The instructions may further be executed by the processor to cause the device to perform the following operations: Determine that one or more frequency channels in the set of radio frequency channels in the shared radio frequency spectrum band are not available for transmission in the first time slot, at least in part based on the listen-before-talk process; And Postpone the uplink transmission using the set of radio frequency channels.

17. The device according to claim 14, wherein The set of radio frequency channels is less than all radio frequency channels associated with the first uplink communication and the second uplink communication.

18. The apparatus according to claim 14, wherein, The set of radio frequency channels includes all radio frequency channels associated with the first uplink communication and all radio frequency channels associated with the second uplink communication.

19. The device according to claim 14, wherein The determination is at least in part based on an in-UE multiplexing and prioritization process, an inter-UE multiplexing and prioritization process, or a combination thereof.

20. The apparatus according to claim 19, wherein, The first uplink communication is an uplink shared channel communication, and the second uplink communication is an uplink control channel communication.

21. The device according to claim 20, wherein, The instructions may further be executed by the processor to cause the device to perform the following operations: Multiplex the uplink control channel communication with the uplink shared channel communication according to the in-UE multiplexing and prioritization process; And Where the set of radio frequency channels includes at least the first radio frequency channel allocated for the first uplink communication and excludes at least the second radio frequency channel.

22. The apparatus according to claim 20, wherein, The instructions may further be executed by the processor to cause the device to perform the following operations: Prioritize the uplink control channel communication over the uplink shared channel communication according to the in-UE multiplexing and prioritization process, at least in part based on the uplink control channel communication being associated with a communication of higher priority compared to the uplink shared channel communication; And Where the set of radio frequency channels includes at least the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication.

23. The apparatus according to claim 19, wherein, The instructions may further be executed by the processor to cause the device to perform the following operations: Receive an indication that different UEs are scheduled to have resources in the first time slot, where the resources use at least the first radio frequency channel allocated for the first uplink communication; Determine, according to the inter-UE multiplexing and prioritization process, that the different UEs have a higher priority for transmission on the first radio frequency channel compared to the first uplink communication; Postpone the first uplink communication at least in part based on determining that the different UEs have the higher priority for transmission on the first radio frequency channel in the first time slot; And where the set of radio frequency channels for the listen-before-talk process includes at least the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication.

24. The device according to claim 14, wherein, The first uplink communication is associated with a first listen-before-talk category, and the second uplink communication is associated with a second listen-before-talk category, and the second listen-before-talk category has a higher priority compared to the first listen-before-talk category.

25. The apparatus according to claim 24, wherein The instructions are further executable by the processor to cause the apparatus to perform the following operations: Prioritize the second uplink communication over the first uplink communication according to an intra-UE prioritization process at least in part based on the second uplink communication being associated with the higher-priority listen-before-talk category; And where the set of radio frequency channels includes the second radio frequency channel and excludes at least the first radio frequency channel allocated for the first uplink communication.

26. The apparatus according to claim 25, wherein, The second listen-before-talk category corresponds to a type 2 channel access process within a channel occupancy time (COT) obtained by the base station, and the first listen-before-talk category corresponds to a type 1 channel access process outside the COT obtained by the base station or associated with a random access transmission.

27. An apparatus for wireless communication at a user equipment (UE), comprising: A unit for receiving, from a base station, a resource allocation for a first uplink communication in a first time slot, where the resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; A unit for identifying a second uplink communication scheduled for transmission using at least a second radio frequency channel in the shared radio frequency spectrum band in the first time slot; A unit for determining, at least in part based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication, a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, where the uplink transmission includes at least one of the first uplink communication and the second uplink communication, and where the set of radio frequency channels is less than all channels allocated for the first time slot; and A unit for performing a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

28. The apparatus according to claim 27, further comprising: A unit for determining, at least in part based on the listen-before-talk process, that each frequency channel in the set of radio frequency channels in the shared radio frequency spectrum band is available for transmission in the first time slot; And A unit for transmitting the uplink transmission in the first time slot using the set of radio frequency channels.

29. The apparatus according to claim 27, further comprising: A unit for determining, at least in part based on the listen-before-talk process, that one or more frequency channels in the set of radio frequency channels in the shared radio frequency spectrum band are not available for transmission in the first time slot; And A unit for postponing the uplink transmission using the set of radio frequency channels.

30. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code including instructions executable by a processor to perform the following operations: Receive resource allocation for a first uplink communication in a first time slot from a base station, wherein, The resource allocation indicates that at least a first radio frequency channel in a shared radio frequency spectrum band is allocated for the first uplink communication; Identifying a second uplink communication scheduled for transmission using at least a second radio frequency channel in the shared radio frequency spectrum band in the first time slot; Determining, at least in part based on one or more of a multiplexing process, a prioritization process, or a combination thereof associated with the first uplink communication and the second uplink communication, a set of radio frequency channels in the shared radio frequency spectrum band to be used for uplink transmission in the first time slot, the uplink transmission including at least one of the first uplink communication and the second uplink communication, wherein the set of radio frequency channels is less than all channels allocated for the first time slot; And Performing a listen-before-talk process to access the set of radio frequency channels in the shared radio frequency spectrum band.

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