Techniques for Channel Access and Uplink (UL) Cancellation by a User Equipment in an Unlicensed Band

Abstract

The present invention provides a technique for wireless communication in a wireless system, including: transmitting unlicensed frequency transmission capability information from a second user equipment; receiving an uplink transmission time for the second user equipment based on the unlicensed frequency transmission capability; receiving, at the second user equipment, a request for a reserved transmission in an unlicensed band based on a cancellation time capability of a first user equipment and the uplink transmission time; transmitting, by the second user equipment, the reserved transmission in the unlicensed band; and transmitting, by the second user equipment, a higher priority uplink transmission in the unlicensed band.

Description

Technical Field

[0001] This application relates to wireless devices and, more particularly, to apparatuses, systems, and methods for performing uplink (UL) cancellation and channel access between user equipments in an unlicensed band in a wireless communication system. Background Art

[0002] The use of wireless communication systems is growing rapidly. In recent years, wireless devices such as smart phones and tablet computers have become increasingly sophisticated. In addition to supporting telephone calls, many mobile devices now also provide access to the Internet, email, text messaging, and navigation using the Global Positioning System (GPS), and are capable of operating sophisticated applications that utilize these features. Additionally, there are many different wireless communication technologies and wireless communication standards. Some examples of wireless communication standards include GSM, UMTS (e.g., associated with WCDMA or TD-SCDMA air interfaces), LTE, LTE-Advanced (LTE-A), HSPA, 3GPP2 CDMA2000 (e.g.: 1xRTT, 1xEV-DO, HRPD, eHRPD), IEEE 802.11 (WLAN or Wi-Fi), BLUETOOTH TM etc.

[0003] The introduction of an increasing number of features and functions in wireless communication devices also requires continuous improvement of wireless communication and improvement of wireless communication devices. To increase coverage and better serve the increasing demands and scope of the intended use of wireless communication, in addition to the above communication standards, there are also wireless communication technologies being developed, including fifth-generation (5G) New Radio (NR) communication. Therefore, there is a need to improve the fields that support such development and design. Summary of the Invention

[0004] Embodiments relate to apparatuses, systems, and methods for performing uplink (UL) cancellation and channel access between user equipments in an unlicensed band in a wireless communication system.

[0005] In some cases, it may be necessary to cancel the scheduled transmission of a user equipment (UE) to allow another UE to transmit. Some wireless systems include different categories of UEs associated with different priorities. For example, a 5G-NR system may include enhanced mobile broadband (eMBB) devices, which may include traditional UE devices such as mobile devices, wireless devices, computing devices, etc., and ultra-reliable low-latency communication (URLLC) devices. Notably, a 5G-NR system may include other categories of devices not shown for clarity but to which the techniques discussed herein are applicable. These URLLC devices are those that support emerging latency-sensitive multimedia use cases and applications such as augmented / virtual reality systems, telemedicine, UltraHD, autonomous vehicles and devices, etc. It is expected that these URLLC devices will require a relatively large amount of bandwidth with minimal latency (e.g., low latency). To help provide low latency, URLLC devices may be prioritized over eMBB devices. As part of the prioritization, the scheduled uplink time period of an eMBB may be cancelled before the eMBB completes transmission.

[0006] In some cases, a wireless system (including eMBB and URLLC devices) may be configured to operate in one or more unlicensed frequency bands or spectrums. Unlicensed spectrum generally refers to frequency bands that are designated for unlicensed use (e.g., use without permission) and made available for public use. This may be contrasted with licensed spectrum, which is a frequency band that is designated for use by a specific entity such as a network operator or for a specific purpose. Since any unlicensed band is available for public use, they may be subject to interference avoidance techniques such as listen-before-talk (LBT) implemented by devices configured to use these unlicensed bands. Therefore, an improved UL cancellation technique is desired that takes into account the challenges posed by operating in unlicensed bands.

[0007] Disclosed herein is a technique for wireless communication in a wireless system, including: transmitting unlicensed frequency transmission capability information from a second user equipment; receiving, based on the unlicensed frequency transmission capability, an uplink transmission time for the second user equipment; receiving, at the second user equipment, a request to reserve a transmission in an unlicensed band based on a cancellation time capability of a first user equipment and the uplink transmission time; transmitting, by the second user equipment, the reserved transmission in the unlicensed band; and transmitting, by the second user equipment, a higher priority uplink transmission in the unlicensed band.

[0008] In some aspects, the technique may also include the following: receiving an indication to sense an unlicensed band before transmitting the higher-priority uplink transmission to determine whether the unlicensed band is in use; and before transmitting the higher-priority uplink transmission, sensing the unlicensed band to determine that the unlicensed band is not in use. In some aspects, the technique may also include the following: receiving an indication of a maximum contention window size from a node, wherein the uplink transmission time for the second user equipment is based on the end of the maximum contention window; listening on the unlicensed band during the maximum contention window to determine that the unlicensed band is idle; and transmitting a reservation transmission during the maximum contention window.

[0009] A technique for wireless communication in a wireless system includes: receiving, from a node, a request to transmit a reservation transmission in an unlicensed band based on a cancellation time capability of a first user equipment and an uplink transmission time; and transmitting the reservation transmission in the unlicensed band.

[0010] A technique for wireless communication in a wireless system includes: transmitting cancellation capability information from a first user equipment; transmitting unlicensed frequency transmission capability information from a second user equipment; transmitting an uplink transmission within an unlicensed band from the first user equipment; receiving a scheduled uplink cancellation time for the first user equipment based on the cancellation capability information and the unlicensed frequency transmission capability information; receiving a scheduled uplink transmission time for the second user equipment based on the cancellation capability information and the unlicensed frequency transmission capability information; canceling the uplink transmission by the first user equipment; and transmitting a higher-priority uplink transmission by the second user equipment based on the scheduled uplink transmission time.

[0011] The techniques described herein may be implemented in and / or used with a variety of different types of devices, including but not limited to any one of a cellular phone, a tablet computer, a wearable computing device, a portable media player, and various other computing devices.

[0012] This summary is intended to provide a brief overview of some of the subject matter described in this document. Accordingly, it should be understood that the above features are merely examples and should not be construed in any way as narrowing the scope or essence of the subject matter described herein. Other features, aspects, and advantages of the subject matter described herein will become apparent from the following detailed description, the drawings, and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] A better understanding of the subject matter may be obtained when the following detailed description of various embodiments is considered in conjunction with the following drawings, in which:

[0014] Figure 1 Shows an exemplary wireless communication system according to some embodiments;

[0015] Figure 2 Shows a base station (BS) communicating with a user equipment (UE) device according to some embodiments;

[0016] Figure 3 Shows an exemplary block diagram of a UE according to some embodiments;

[0017] Figure 4 Shows an exemplary block diagram of a BS according to some embodiments;

[0018] Figure 5 Shows an exemplary block diagram of cellular communication circuitry according to some embodiments;

[0019] Figure 6 Shows an exemplary block diagram of a network element according to some embodiments;

[0020] Figure 7 Shows an exemplary timing diagram of uplink cancellation according to aspects of the present disclosure;

[0021] Figure 8 Is a timing diagram showing an unlicensed band channel access process according to aspects of the present disclosure;

[0022] Figures 9 to 12 Shows an exemplary timing diagram according to aspects of the present disclosure;

[0023] Figure 13A Is a flowchart showing techniques for communication in a wireless system according to aspects of the present disclosure;

[0024] Figure 13B Is a flowchart showing various ways of receiving unlicensed frequency transmission capability information from a second user equipment according to aspects of the present disclosure;

[0025] Figure 13C Is a flowchart showing additional ways of receiving unlicensed frequency transmission capability information from a second user equipment according to aspects of the present disclosure;

[0026] Figure 13D And Figure 13E Is a flowchart showing optional ways for communication in a wireless system according to aspects of the present disclosure;

[0027] Figure 14A Is a flowchart showing techniques for communication in a wireless system according to aspects of the present disclosure;

[0028] Figure 14Bis a flowchart illustrating an optional manner for communication in a wireless system in accordance with aspects of the present disclosure;

[0029] Figure 15 is a flowchart illustrating techniques for communication in a wireless system in accordance with aspects of the present disclosure; and

[0030] Figure 16 is a flowchart illustrating techniques for communication in a wireless system in accordance with aspects of the present disclosure.

[0031] Although the features described herein may be susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are described in detail herein. However, it should be understood that the drawings and detailed description thereof are not intended to limit the present disclosure to the particular forms disclosed, but on the contrary, are intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the subject matter as defined by the appended claims. Detailed Description

[0032] The following is a glossary of terms that may be used in the present disclosure:

[0033] Memory medium—Any of various types of non-transitory memory devices or storage devices. The term “memory medium” is intended to include installation media such as CD-ROMs, floppy disks, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; non-volatile memory such as flash memory, magnetic media such as hard disk drives, or optical storage devices; registers, or other similar types of memory elements, etc. The memory medium may also include other types of non-transitory memory or combinations thereof. In addition, the memory medium may be located in a first computer system that executes a program, or may be located in a different second computer system that is connected to the first computer system via a network such as the Internet. In the latter case, the second computer system may provide program instructions to the first computer for execution. The term “memory medium” may include two or more memory media that may reside at different locations in, for example, different computer systems connected via a network. The memory medium may store program instructions (e.g., embodied as a computer program) executable by one or more processors.

[0034] Carrier medium - The storage medium as described above and physical transmission media such as buses, networks, and / or other physical transmission media that convey signals such as electrical, electromagnetic, or digital signals.

[0035] Programmable hardware element - includes various hardware devices, which include multiple programmable function blocks connected via programmable interconnects. Examples include FPGA (Field Programmable Gate Array), PLD (Programmable Logic Device), FPOA (Field Programmable Object Array), and CPLD (Complex PLD). The programmable function blocks can vary from fine-grained (combinational logic components or lookup tables) to coarse-grained (arithmetic logic units or processor cores). The programmable hardware element can also be referred to as a "configurable logic component".

[0036] Computer system - any of various types of computing systems or processing systems, including personal computer systems (PCs), mainframe computer systems, workstations, network appliances, Internet appliances, personal digital assistants (PDAs), television systems, grid computing systems, or other devices or combinations of devices. Generally, the term "computer system" can be broadly defined to cover any device (or combination of devices) having at least one processor that executes instructions from a memory medium.

[0037] User equipment (UE) (or "UE device") - any of various types of computer systems or devices that are mobile or portable and perform wireless communication. Examples of UE devices include mobile phones or smartphones (e.g., iPhone TM , Android TM -based phones), portable gaming devices (e.g., Nintendo DS TM , PlayStation Portable TM , Gameboy Advance TM , iPhone TM ), laptop computers, wearable devices (e.g., smartwatches, smart glasses), PDAs, portable Internet devices, music players, data storage devices, or other handheld devices, etc. Generally, the term "UE" or "UE device" can be broadly defined to cover any electronic device, computing device, and / or telecommunications device (or combination of devices) that can be easily transported by a user and is capable of wireless communication.

[0038] Wireless device - any of various types of computer systems or devices that perform wireless communication. The wireless device can be portable (or mobile), or it can be stationary or fixed in a certain location. A UE is an example of a wireless device.

[0039] Communication device - any of various types of computer systems or devices that perform communication, where the communication can be wired or wireless. The communication device can be portable (or mobile), or it can be stationary or fixed in a certain location. A wireless device is an example of a communication device. A UE is another example of a communication device.

[0040] Base Station - The term "base station" has the full scope of its ordinary meaning and includes at least a wireless communication station that is installed at a fixed location and is used to communicate as part of a wireless telephone system or radio system. For example, if a base station is implemented in the context of LTE, it may alternatively be referred to as an "eNodeB" or "eNB". If a base station is implemented in the context of 5G NR, it may alternatively be referred to as a "gNodeB" or "gNB". Although certain aspects are described in the context of LTE or 5G NR, references to "eNB", "gNB", "nodeB", "base station", "NB", etc. may also refer to one or more wireless nodes that serve a cell to provide a wireless connection between a user equipment and a generally wider network, and the concepts discussed are not limited to any particular wireless technology. Although certain aspects are described in the context of LTE or 5G NR, references to "eNB", "gNB", "nodeB", "base station", "NB", etc. are not intended to limit the concepts discussed herein to any particular wireless technology, and the concepts discussed can be applied to any wireless system.

[0041] Node - The term "node" as used herein may refer to one or more devices associated with a cell that generally provides a wireless connection between a user equipment and a wired network.

[0042] Processing Element (or Processor) - refers to various elements or combinations of elements that are capable of performing functions in a device such as a user equipment or a cellular network device. Processing elements may include, for example: a processor and associated memory, portions or circuits of individual processor cores, entire processor cores, separate processors, processor arrays, circuits such as ASICs (Application Specific Integrated Circuits), programmable hardware elements such as field programmable gate arrays (FPGAs), and any of the various combinations above.

[0043] Channel - A medium for transmitting information from a transmitter to a receiver. It should be noted that since the characteristics of the term "channel" can vary according to different wireless protocols, the term "channel" as used in the present invention can be considered to be used in a manner that conforms to the standards of the type of device to which the term usage refers. In some standards, the channel width can be variable (e.g., depending on device capabilities, frequency band conditions, etc.). For example, LTE can support an expandable channel bandwidth from 1.4 MHz to 20 MHz. In contrast, a WLAN channel can be 22 MHz wide, while a Bluetooth channel can be 1 MHz wide. Other protocols and standards may include different definitions of channels. In addition, some standards may define and use multiple types of channels, such as different channels for uplink or downlink and / or different channels for different purposes such as data, control information, etc.

[0044] Band - The term "band" has its full ordinary meaning and includes at least a portion of the spectrum (e.g., radio frequency spectrum) where channels are used or set aside for the same purpose.

[0045] Unlicensed band - The term "unlicensed band" has its full ordinary meaning and includes at least a portion of the spectrum (e.g., radio frequency spectrum) that is available for public use and on which transmissions can be made without permission. Generally, devices operating in an unlicensed band are not protected by regulatory safeguards against interference and may be subject to power and other authorization limitations. Examples of unlicensed band devices include unlicensed transmitter devices that comply with the rules of Part 15 of the Federal Communications Commission (FCC) rules.

[0046] Automatically - Means that an action or operation is performed by a computer system (e.g., software executed by a computer system) or a device (e.g., circuitry, programmable hardware element, ASIC, etc.) without the action or operation being directly specified or performed through user input. Thus, the term "automatically" is contrary to an operation performed or specified manually by a user, where the user provides input to directly perform the operation. An automated process may be initiated by input provided by the user, but the subsequent actions that are "automatically" performed are not specified by the user, i.e., are not "manually" performed, where the user specifies each action to be performed. For example, a user filling out a spreadsheet by selecting each field and providing input to specify information (e.g., by typing information, selecting checkboxes, radio selections, etc.) is manually filling out the spreadsheet, even though the computer system must update the spreadsheet in response to the user's actions. The spreadsheet can be filled out automatically by a computer system, where the computer system (e.g., software executing on the computer system) analyzes the fields of the spreadsheet and fills out the spreadsheet without any user input specifying the answers to the fields. As indicated above, the user can initiate the automatic filling out of the spreadsheet but does not participate in the actual filling out of the spreadsheet (e.g., the user does not manually specify the answers to the fields but they are completed automatically). This specification provides various examples of operations that are automatically performed in response to actions taken by the user.

[0047] About - Means close to the correct or exact value. For example, about can mean a value within 1% to 10% of the exact (or desired) value. However, it should be noted that the actual threshold (or tolerance) can depend on the application. For example, in some embodiments, "about" can mean within 0.1% of some specified or desired value, while in various other embodiments, depending on the expectations or requirements of the particular application, the threshold can be, for example, 2%, 3%, 5%, etc.

[0048] Concurrency — refers to the parallel execution or implementation, where tasks, processes, or programs are executed in at least a partially overlapping manner. For example, "strong" or strict parallelism can be used to achieve concurrency, where tasks are executed (at least partially) in parallel on corresponding computing elements; or "weak parallelism" can be used to achieve concurrency, where tasks are executed in an interleaved manner (e.g., through time multiplexing of execution threads).

[0049] Configured to — various components can be described as "configured to" perform one or more tasks. In such an environment, "configured to" is a broad expression generally meaning "having" the "structure" to perform one or more tasks during operation. Thus, even when the component is not currently performing a task, the component can be configured to perform the task (e.g., a set of electrical conductors can be configured to electrically connect a module to another module, even when the two modules are not connected). In some contexts, "configured to" can be a broad expression generally meaning "having" the "circuitry" to perform one or more tasks during operation. Thus, even when the component is not currently powered on, the component can be configured to perform the task. Generally, the circuitry forming the structure corresponding to "configured to" can include hardware circuitry.

[0050] For ease of description, various components can be described as performing one or more tasks. Such a description should be interpreted to include the phrase "configured to". A component described as configured to perform one or more tasks is expressly intended not to invoke the interpretation of 35 U.S.C. § 112(f) for that component.

[0051] Exemplary wireless communication system

[0052] Now turning to Figure 1 , a simplified example of a wireless communication system according to some embodiments is shown. Note that Figure 1 the system of

[0053] is only one example of possible systems, and the features of the present disclosure can be implemented in any one of various systems as needed.

[0054] As shown, the exemplary wireless communication system includes a base station 102A that communicates with one or more user devices 106A, user devices 106B through user device 106N, etc. via a transmission medium. Each user device can be referred to herein as a "user equipment" (UE). Thus, user device 106 is referred to as a UE or a UE device.

[0055] The communication area (or coverage area) of a base station can be referred to as a "cell". The base station 102A and the user equipment 106 can be configured to communicate via a transmission medium using any one of various radio access technologies (RATs), which are also known as wireless communication technologies or telecommunication standards, such as GSM, UMTS (associated with, for example, the WCDMA or TD-SCDMA air interface), LTE, LTE-Advanced (LTE-A), 5G New Radio (5G NR), HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), etc.

[0056] As shown, the base station 102A can also be equipped to communicate with the network 100 (e.g., among various possibilities, the core network of a cellular service provider, a telecommunication network such as the Public Switched Telephone Network (PSTN) and / or the Internet). Thus, the base station 102A can facilitate communication between user equipments and / or between a user equipment and the network 100. In particular, the cellular base station 102A can provide the UE 106 with various communication capabilities such as voice, SMS, and / or data services.

[0057] The base station 102A and other similar base stations operating according to the same or different cellular communication standards (such as base stations 102B......102N) can thus be provided as a network of cells, which can provide continuous or almost continuous overlapping services to the UEs 106A-N and similar devices in a geographical area via one or more cellular communication standards.

[0058] Therefore, although the base station 102A can act as the "serving cell" of the UEs 106A-N as shown in Figure 1 , each UE 106 may also be able to receive signals (and potentially be within its communication range) from one or more other cells (which can be provided by base stations 102B-N and / or any other base stations), and the one or more other cells can be referred to as "adjacent cells". Such cells may also be able to facilitate communication between user equipments and / or between a user equipment and the network 100. Such cells can include "macro" cells, "micro" cells, "pico" cells, and / or any various other granularities of cells providing service area sizes. For example, the base stations 102A to 102B shown in Figure 1 can be macro cells, while the base station 102N can be a micro cell. Other configurations are also possible.

[0059] In some embodiments, base station 102A may be a next-generation base station, e.g., a 5G New Radio (5G NR) base station or a "gNB". In some embodiments, the gNB may be connected to a traditional Evolved Packet Core (EPC) network and / or connected to a NR Core (NRC) / 5G Core (5GC) network. Additionally, a gNB cell may include one or more Transmission and Reception Points (TRPs). Further, a UE capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs. For example, base station 102A and one or more other base stations 102 may support joint transmission such that UE 106 may be able to receive transmissions from multiple base stations (and / or multiple TRPs provided by the same base station). For example, as Figure 1 shown, both base station 102A and base station 102C are shown serving UE 106A.

[0060] Note that UE 106 is capable of communicating using multiple wireless communication standards. For example, in addition to at least one cellular communication protocol (e.g., GSM, UMTS (associated with, e.g., WCDMA or TD-SCDMA air interfaces), LTE, LTE-A, 5G NR, HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), etc.), UE 106 may be configured to communicate using wireless networking (e.g., Wi-Fi) and / or peer-to-peer wireless communication protocols (e.g., Bluetooth, Wi-Fi peer-to-peer, etc.). If desired, UE 106 may also or alternatively be configured to communicate using one or more Global Navigation Satellite Systems (GNSS, e.g., GPS or GLONASS), one or more mobile television broadcast standards (e.g., Advanced Television Systems Committee - Mobile / Handheld (ATSC-M / H)), and / or any other wireless communication protocol. Other combinations of wireless communication standards (including more than two wireless communication standards) are also possible.

[0061] Exemplary User Equipment (UE)

[0062] Figure 2 illustrates user equipment 106 (e.g., one of devices 106A to 106N) communicating with base station 102 according to some embodiments. UE 106 may be a device with cellular communication capabilities, such as a mobile phone, a handheld device, a computer, a laptop, a tablet, a smartwatch, or other wearable device or virtually any type of wireless device.

[0063] UE 106 may include a processor (processing element) configured to execute program instructions stored in a memory. UE 106 may perform any of the method implementations described herein by executing such stored instructions. Alternatively or additionally, UE 106 may include programmable hardware elements such as an FPGA (Field Programmable Gate Array), an integrated circuit, and / or any of various other possible hardware components configured to perform (e.g., individually or in combination) any one of the method implementations described herein or any part of any one of the method implementations described herein.

[0064] UE 106 may include one or more antennas for communicating using one or more wireless communication protocols or technologies. In some embodiments, UE 106 may be configured to communicate using, for example, NR or LTE using at least some shared radio components. As an additional possibility, the UE 106 may be configured to communicate using CDMA2000 (1xRTT / 1xEV-DO / HRPD / eHRPD) or LTE using a single shared radio component and / or GSM or LTE using a single shared radio component. The shared radio may be coupled to a single antenna or may be coupled to multiple antennas (e.g., for MIMO) for performing wireless communication. Generally, the radio components may include any combination of a baseband processor, analog radio frequency (RF) signal processing circuitry (e.g., including filters, mixers, oscillators, amplifiers, etc.), or digital processing circuitry (e.g., for digital modulation and other digital processing). Similarly, the radio components may implement one or more receive chains and transmit chains using the foregoing hardware. For example, UE 106 may share one or more portions of a receive chain and / or a transmit chain among multiple wireless communication technologies such as those discussed above.

[0065] In some embodiments, UE 106 may include separate transmit chains and / or receive chains (e.g., including separate antennas and other radio components) for each wireless communication protocol it is configured to communicate with. As another possibility, UE 106 may include one or more radio components shared among multiple wireless communication protocols and one or more radio components uniquely used by a single wireless communication protocol. For example, UE 106 may include shared radio components for communicating using either LTE or 5G NR (or, among various possibilities, either LTE or 1xRTT, or either LTE or GSM) and separate radio components for communicating using each of Wi-Fi and Bluetooth. Other configurations are possible.

[0066] Exemplary communication device

[0067] Figure 3Exemplary simplified block diagram of communication device 106 according to some embodiments is shown. Note that Figure 3 the block diagram of the communication device is only one example of a possible communication device. According to embodiments, in addition to other devices, communication device 106 may be a user equipment (UE) device, a mobile device or mobile station, a wireless device or wireless station, a desktop computer or computing device, a mobile computing device (e.g., laptop, notebook or portable computing device), a tablet, and / or a combination of devices. As shown, communication device 106 may include a set of components 300 configured to perform core functions. For example, the set of components may be implemented as a system-on-chip (SOC), which may include portions for various purposes. Alternatively, the set of components 300 may be implemented as separate components or groups of components for various purposes. This set of components 300 may be (e.g., communicatively; directly or indirectly) coupled to various other circuits of communication device 106.

[0068] For example, communication device 106 may include various types of memory (e.g., including NAND flash 310), input / output interfaces such as connector I / F 320 (e.g., for connecting to a computer system; docking station; charging station; input devices such as microphones, cameras, keyboards; output devices such as speakers; etc.), a display 360 that may be integrated with or external to communication device 106, and wireless communication circuitry 330 (e.g., for LTE, LTE-A, NR, UMTS, GSM, CDMA2000, Bluetooth, Wi-Fi, NFC, GPS, etc.). In some embodiments, communication device 106 may include wired communication circuitry (not shown), such as a network interface card for Ethernet, for example.

[0069] Wireless communication circuitry 330 may be (e.g., communicatively; directly or indirectly) coupled to one or more antennas, such as one or more antennas 335 as shown. Wireless communication circuitry 330 may include cellular communication circuitry and / or mid- to short-range wireless communication circuitry, and may include multiple receive chains and / or multiple transmit chains for receiving and / or transmitting multiple spatial streams, such as in a multiple-input multiple-output (MIMO) configuration.

[0070] In some embodiments, as further described below, the cellular communication circuitry 330 may include one or more receive chains for multiple RATs (including and / or coupled to (e.g., communicatively; directly or indirectly) dedicated processors and / or radio components (e.g., a first receive chain for LTE and a second receive chain for 5G NR). Additionally, in some embodiments, the cellular communication circuitry 330 may include a single transmit chain that can switch between radio components dedicated to a particular RAT. For example, a first radio component may be dedicated to a first RAT (e.g., LTE) and may communicate with a dedicated receive chain and a transmit chain shared with a second radio component. The second radio component may be dedicated to a second RAT (e.g., 5G NR) and may communicate with a dedicated receive chain and the shared transmit chain.

[0071] The communication device 106 may also include one or more user interface elements and / or be configured to work with one or more user interface elements. The user interface elements may include various elements such as a display 360 (which may be a touchscreen display), a keyboard (which may be a discrete keyboard or may be implemented as part of a touchscreen display), a mouse, a microphone and / or a speaker, one or more cameras, one or more buttons, and / or any of various other elements capable of providing information to a user and / or receiving or interpreting user input.

[0072] The communication device 106 may also include one or more smart cards 345 having SIM (Subscriber Identity Module) functionality, such as one or more UICC cards (one or more Universal Integrated Circuit Cards) 345.

[0073] As shown, the SOC 300 may include a processor 302 and a display circuit 304. The processor may execute program instructions for the communication device 106, and the display circuit may perform graphics processing and provide a display signal to the display 360. One or more processors 302 may also be coupled to a memory management unit (MMU) 340 (the MMU may be configured to receive addresses from one or more processors 302 and translate those addresses into locations in a memory (e.g., memory 306, read-only memory (ROM) 350, NAND flash memory 310)), and / or be coupled to other circuits or devices (such as the display circuit 304, the wireless communication circuitry 330, the connector I / F 320, and / or the display 360). The MMU 340 may be configured to perform memory protection and page table translation or setup. In some embodiments, the MMU 340 may be included as part of the processor 302.

[0074] As described above, the communication device 106 may be configured to communicate using wireless and / or wired communication circuitry. As described herein, the communication device 106 may include hardware and software components for implementing any of the various features and techniques described herein. For example, by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium), the processor 302 of the communication device 106 may be configured to implement some or all of the features described in the present invention. Alternatively (or in addition), the processor 302 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit). Alternatively (or in addition), in combination with one or more of the other components 300, 304, 306, 310, 320, 330, 340, 345, 350, 360, the processor 302 of the communication device 106 may be configured to implement some or all of the features described herein.

[0075] In addition, as described in the present invention, the processor 302 may include one or more processing elements. Thus, the processor 302 may include one or more integrated circuits (ICs) configured to perform the functions of the processor 302. In addition, each integrated circuit may include circuitry (e.g., a first circuit, a second circuit, etc.) configured to perform one or more of the functions of the processor 302.

[0076] In addition, as described herein, the wireless communication circuitry 330 may include one or more processing elements. In other words, one or more processing elements may be included in the wireless communication circuitry 330. Thus, the wireless communication circuitry 330 may include one or more integrated circuits (ICs) configured to perform the functions of the wireless communication circuitry 330. In addition, each integrated circuit may include circuitry (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of the wireless communication circuitry 330.

[0077] Exemplary base station

[0078] Figure 4 An exemplary block diagram of a base station 102 is shown in accordance with some embodiments. Note that Figure 4 the base station shown is only one example of a possible base station. As shown, the base station 102 may include a processor 404 that can execute program instructions for the base station 102. The processor 404 may also be coupled to a memory management unit (MMU) 440 or other circuitry or device, which may be configured to receive addresses from the processor 404 and translate those addresses into locations in a memory (e.g., memory 460 and read-only memory (ROM) 450).

[0079] The base station 102 may include at least one network port 470. The network port 470 may be configured to couple to a telephone network and provide access to Figure 1and Figure 2 multiple devices of the telephone network as described in, such as UE device 106.

[0080] The network port 470 (or an additional network port) may also be configured or alternatively configured to be coupled to a cellular network, such as the core network of a cellular service provider. The core network may provide mobility-related services and / or other services to multiple devices such as UE device 106. In some cases, the network port 470 may be coupled to the telephone network via the core network, and / or the core network may provide the telephone network (e.g., in other UE devices served by the cellular service provider).

[0081] In some embodiments, the base station 102 may be a next-generation base station, e.g., a 5G New Radio (5G NR) base station or a "gNB". In such embodiments, the base station 102 may be connected to a traditional Evolved Packet Core (EPC) network and / or connected to an NR Core (NRC) / 5G Core (5GC) network. Additionally, the base station 102 may be considered a 5G NR cell and may include one or more Transmission and Reception Points (TRPs). Further, a UE capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs.

[0082] The base station 102 may include at least one antenna 434 and possibly multiple antennas. The at least one antenna 434 may be configured to function as a wireless transceiver and may be further configured to communicate with the UE device 106 via the radio component 430. The antenna 434 communicates with the radio component 430 via the communication link 432. The communication link 432 may be a receive link, a transmit link, or both. The radio component 430 may be configured to communicate via various wireless communication standards, including but not limited to 5G NR, LTE, LTE-A, GSM, UMTS, CDMA2000, Wi-Fi, etc.

[0083] The base station 102 may be configured to perform wireless communication using multiple wireless communication standards. In some cases, the base station 102 may include multiple radios that enable the base station 102 to communicate according to multiple wireless communication technologies. For example, as one possibility, the base station 102 may include an LTE radio component for performing communication according to LTE and a 5G NR radio component for performing communication according to 5G NR. In this case, the base station 102 may be capable of operating as both an LTE base station and a 5G NR base station. As another possibility, the base station 102 may include a multi-mode radio component capable of performing communication according to any of multiple wireless communication technologies (e.g., 5G NR and LTE, 5G NR and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc.).

[0084] As further described hereinbelow, BS 102 may include hardware and software components for implementing or supporting the specific implementations of the features described herein. The processor 404 of the base station 102 may be configured to implement or support the implementation of part or all of the methods described herein, for example, by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). Alternatively, the processor 404 may be configured as a programmable hardware element such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit), or a combination thereof. Alternatively (or in addition), in combination with one or more of the other components 430, component 432, component 434, component 440, component 450, component 460, component 470, the processor 404 of the base station 102 may be configured to implement or support the implementation of part or all of the features described herein.

[0085] In addition, as described in the present invention, one or more processors 404 may include one or more processing elements. Thus, the processor 404 may include one or more integrated circuits (ICs) configured to perform the functions of the processor 404. In addition, each integrated circuit may include circuits (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of one or more processors 404.

[0086] In addition, as described in the present invention, the radio component 430 may include one or more processing elements. Thus, the radio component 430 may include one or more integrated circuits (ICs) configured to perform the functions of the radio component 430. In addition, each integrated circuit may include circuits (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of the radio component 430.

[0087] Exemplary cellular communication circuitry

[0088] Figure 5 An exemplary simplified block diagram of a cellular communication circuit according to some embodiments is shown. Note that Figure 5The block diagram of the cellular communication circuit is merely an example of a possible cellular communication circuit; other circuits, such as those including or coupled to sufficient antennas for different RATs to perform uplink activities using independent antennas, or circuits including or coupled to fewer antennas, such as circuits that can be shared among multiple RATs, are also possible. According to some embodiments, the cellular communication circuit 330 may be included in a communication device such as the communication device 106 described above. As described above, in addition to other devices, the communication device 106 may be a user equipment (UE) device, a mobile device or mobile station, a wireless device or wireless station, a desktop computer or computing device, a mobile computing device (e.g., a laptop computer, notebook or portable computing device), a tablet computer, and / or a combination of devices.

[0089] The cellular communication circuit 330 may be (e.g., communicatively; directly or indirectly) coupled to one or more antennas, such as antennas 335a-b and 336 as shown. In some embodiments, the cellular communication circuit 330 may include dedicated receive chains for multiple RATs (including and / or coupled to (e.g., communicatively; directly or indirectly) dedicated processors and / or radio components (e.g., a first receive chain for LTE and a second receive chain for 5G NR). For example, as Figure 5 shown, the cellular communication circuit 330 may include a first modem 510 and a second modem 520. The first modem 510 may be configured for communication according to a first RAT (e.g., such as LTE or LTE-A), and the second modem 520 may be configured for communication according to a second RAT (e.g., such as 5G NR).

[0090] As shown, the first modem 510 may include one or more processors 512 and a memory 516 communicative with the processors 512. The modem 510 may communicate with a radio frequency (RF) front end 530. The RF front end 530 may include circuitry for transmitting and receiving radio signals. For example, the RF front end 530 may include a receive circuit (RX) 532 and a transmit circuit (TX) 534. In some embodiments, the receive circuit 532 may communicate with a downlink (DL) front end 550, which may include circuitry for receiving radio signals via antenna 335a.

[0091] Similarly, the second modem 520 may include one or more processors 522 and a memory 526 that communicates with the processors 522. The modem 520 may communicate with an RF front end 540. The RF front end 540 may include circuitry for transmitting and receiving radio signals. For example, the RF front end 540 may include a receive circuit 542 and a transmit circuit 544. In some embodiments, the receive circuit 542 may communicate with a DL front end 560, which may include circuitry for receiving radio signals via an antenna 335b.

[0092] In some embodiments, a switch 570 may couple the transmit circuit 534 to an uplink (UL) front end 572. Additionally, the switch 570 may couple the transmit circuit 544 to the UL front end 572. The UL front end 572 may include circuitry for transmitting radio signals via an antenna 336. Thus, when the cellular communication circuit 330 receives an instruction to transmit according to a first RAT (e.g., supported by the first modem 510), the switch 570 may be switched to a first state that allows the first modem 510 to transmit signals according to the first RAT (e.g., via a transmit chain that includes the transmit circuit 534 and the UL front end 572). Similarly, when the cellular communication circuit 330 receives an instruction to transmit according to a second RAT (e.g., supported by the second modem 520), the switch 570 may be switched to a second state that allows the second modem 520 to transmit signals according to the second RAT (e.g., via a transmit chain that includes the transmit circuit 544 and the UL front end 572).

[0093] As described herein, the first modem 510 and / or the second modem 520 may include hardware and software components for implementing any of the various features and techniques described herein. For example, by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium), the processors 512, 522 may be configured to implement part or all of the features described herein. Alternatively (or in addition), the processors 512, 522 may be configured as programmable hardware elements, such as an FPGA (field-programmable gate array) or as an ASIC (application-specific integrated circuit). Alternatively (or in addition), in combination with one or more of the other components 530, 532, 534, 540, 542, 544, 550, 570, 572, 335, and 336, the processors 512, 522 may be configured to implement part or all of the features described herein.

[0094] In addition, as described herein, processors 512, 522 may include one or more processing elements. Accordingly, processors 512, 522 may include one or more integrated circuits (ICs) configured to perform the functions of processors 512, 522. In addition, each integrated circuit may include circuitry (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of processors 512, 522.

[0095] In some embodiments, the cellular communication circuitry 330 may include only one transmit / receive chain. For example, the cellular communication circuitry 330 may not include a modem 520, an RF front end 540, a DL front end 560, and / or an antenna 335b. As another example, the cellular communication circuitry 330 may not include a modem 510, an RF front end 530, a DL front end 550, and / or an antenna 335a. In some embodiments, the cellular communication circuitry 330 may also not include a switch 570, and the RF front end 530 or the RF front end 540 may communicate with the UL front end 572, e.g., directly.

[0096] Exemplary Network Element

[0097] Figure 6 An exemplary block diagram of a network element 600 is shown in accordance with some embodiments. According to some embodiments, the network element 600 may implement one or more logical functions / entities of a cellular core network, such as a Mobility Management Entity (MME), a Serving Gateway (S-GW), an Access and Mobility Management Function (AMF), a Session Management Function (SMF), a Network Slice Quota Management (NSQM) function, etc. It should be noted that Figure 6 the network element 600 shown is only one example of a possible network element 600. As shown, the core network element 600 may include one or more processors 604 that may execute program instructions of the core network element 600. The processor 604 may also be coupled to a Memory Management Unit (MMU) 640 (which may be configured to receive addresses from the processor 604 and translate these addresses into locations in a memory, e.g., a memory 660 and a Read-Only Memory (ROM) 650), or be coupled to other circuits or devices.

[0098] The network element 600 may include at least one network port 670. The network port 670 may be configured to couple to one or more base stations and / or other cellular network entities and / or devices. The network element 600 may communicate with base stations (e.g., eNB / gNB) and / or other network entities / devices via any of a variety of communication protocols and / or interfaces.

[0099] As further described hereinbelow, network element 600 may include hardware and software components for implementing or supporting embodiments of the features described herein. The processor 604 of the core network element 600 may be configured to implement or support embodiments of part or all of the methods described herein, for example, by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). Alternatively, the processor 604 may be configured as a programmable hardware element such as an FPGA (Field Programmable Gate Array) or configured as an ASIC (Application Specific Integrated Circuit) or a combination thereof.

[0100] Uplink transmission cancellation

[0101] Figure 7 An exemplary timing diagram 700 of an uplink cancellation 700 according to an aspect of the present disclosure is shown. The timing diagram 700 includes the timeline of a lower-priority UE device 702 and the timeline of a higher-priority UE device 750 within a single time period. For example, the lower-priority UE device 702 may be an eMBB device, a massive machine type communication (mMTC) device, etc., and the higher-priority UE device 750 may be a URLLC device. As shown, the lower-priority UE device 702 receives a lower-priority UE device PDCCH message 704 scheduling an uplink interval 706 during which the lower-priority UE device 702 may transmit. In some cases, the lower-priority UE device PDCCH message 704 may be sent to multiple lower-priority UE devices and provide transmission and reception scheduling for the multiple lower-priority UE devices. To facilitate cancellation of a UE's scheduled uplink during transmission, the UE may listen for an uplink cancellation indication (ULCI) during a defined UL CI monitoring occasion 708. In some cases, the UL CI may be sent using a new radio network temporary identifier (RNTI) such as a cancellation indication RNTI (CI-RNTI). The UL CI message helps to allow individual cancellation of specific transmissions and / or repetitions. When the UL CI 710 is received during the monitoring occasion, the lower-priority UE device 702 may cancel its uplink 712 by stopping its transmission. By stopping the transmission of the lower-priority UE device 702, the higher-priority UE device 750 may be scheduled, for example, via a higher-priority UE device PDCCH 752, to transmit 754 without interference. By canceling the uplink from the lower-priority UE device, the higher-priority UE device is able to transmit without having to wait for the entire uplink interval 706 of the lower-priority UE device to elapse. In some cases, the canceled UE does not automatically resume transmission but may be rescheduled at a later time, for example, by another lower-priority UE device PDCCH message.

[0102] In some cases, the UL CI may include a 2D bitmap indicating the cancelled time and frequency resource regions. The UL CI defines, in terms of time and frequency, the reference time region within which the UL CI is to be applied. The reference time region to which the UL CI applies starts X symbols after the end symbol of the PDCCH CORESET carrying the UL CI. A CORESET is a set and set of parameters of physical resources (such as a downlink resource grid) for carrying PDCCH / downlink control information (DCI), detecting the power level on an unlicensed frequency band, and determining that the detected power level is below a threshold power level.

[0103] Figure 8 is a timing diagram showing an unlicensed band channel access procedure 800 according to aspects of the present disclosure. Since the unlicensed band is publicly accessible, other devices may transmit on the unlicensed band. Additionally, devices operating on the unlicensed band generally desire to try to minimize interference to other devices also operating on the unlicensed band. To facilitate sharing access to the unlicensed band, wireless devices such as UEs may be configured to listen before talk (LBT). In LBT, the wireless device listens on the unlicensed band that the wireless device wants to use to determine if the unlicensed band is already in use. LBT can be implemented in a variety of ways. One specific implementation is load-based equipment (LBE), where channel sensing of the unlicensed band can be performed at any time according to the needs of the wireless device. Multiple categories of LBE can be defined for the interoperability of multiple devices associated with a particular type of wireless network. For example, in some wireless networks, categories of LBT can be defined, and the wireless device can implement one or more LBT categories. Figure 8 Examples of four LBT support categories (e.g., NR-U LBT categories) illustrate wireless transmissions 8021 to 8024 over time 801 on an unlicensed band by an NR unlicensed band (NR-U) device. A device with support category 1 (CAT-1) 804 may transmit 8022 immediately on the unlicensed band without first listening 804 on the unlicensed band (e.g., no LBT). There may be other restrictions on CAT-1 devices, for example, the duration of UL performed without LBT sensing may be limited to a certain amount of time, such as 584 μs.

[0104] Devices supporting Category 2 (CAT-2) can sense the licensed band within a fixed amount of time without a random backoff period. If a CAT-2 device senses that no other device is transmitting during the CCA period 808, the CAT-2 device starts transmitting after the end of the CCA period 806. If another transmission is detected during the CCA period 806, the CAT-2 device does not transmit. In this example, the CAT-2 device can sense other devices 808 during a 25 μs Clear Channel Assessment (CCA) period 806. In some cases, a wireless system such as NR-U can define multiple CCA periods, each with a specific sensing timing. For example, a UE can support CAT-2,25, where if the UE determines that the unlicensed band is idle, the UE can transmit immediately after a 25 μs CCA. During the CCA, the UE can sense the unlicensed band during two sensing time slots. The length of these sensing time slots can be 9 μs, where the first sensing time slot occurs at the start of the CCA, and the second sensing time slot starts 16 μs after the start of the CCA. Sensing that the unlicensed band is idle within the sensing time slot occurs by detecting the power level on the unlicensed band and determining that the detected power is less than a predefined detection threshold within at least one sensing duration (such as 4 μs within the sensing time slot). If the unlicensed band is sensed to be idle in both of these sensing time slots, the unlicensed band is considered idle under CAT-2,25. As another example, a UE can support CAT-2,16, where if the UE determines that the unlicensed band is idle, the UE can transmit immediately after a 16 μs CCA. During the CCA, the UE can sense the unlicensed band by detecting the power level on the unlicensed band and determining that the detected power level is below a threshold power level for a total of 5 μs, where at least 4 μs of this sensing must occur within the last 9 μs of the 16 μs CCA. It should be understood that 25 μs and 16 μs are exemplary CCA periods, and other CCA periods are possible.

[0105] A device supporting Category 3 (CAT-3) may first wait for the unlicensed band to be idle for a period of time, such as 16 microseconds, and then sense 810 within a fixed size contention time window. If the CAT-3 device senses 810 that another device is transmitting during the contention window, the CAT-3 device will back off for a random period of time 812 and attempt to sense 810 the unlicensed channel again. The CAT-3 device may sense at a random time within a contention window of a fixed size (e.g., length). The sensing may be performed by detecting a power level on the unlicensed band and determining whether the detected power level is below a threshold power level. If the CAT-3 device senses 810 that no other device is transmitting during the sensing period, the CAT-3 device begins transmitting. A CAT-4 device is similar to a CAT-3 device, except that a Category 4 (CAT-4) device senses 814 within a contention window of a variable size. Other than that, the backoff and sensing operations in CAT-4 are similar to CAT-3.

[0106] Typically, uplink channel occupation time (COT) for unlicensed bands may be initiated by a node or wireless device. In a node-initiated COT, a node may obtain access to an unlicensed band and transmit an indication to one or more UEs to transmit uplink bursts on a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), a physical random access channel (PRACH), and / or a sounding reference signal (SRS). For a wireless device-initiated COT, a wireless device may obtain access to an unlicensed band, for example using a CAT-4 LBT procedure, and transmit uplink control information (UCI) PUSCH.

[0107] In some cases, both higher-priority UE devices (such as URLLC devices) and lower-priority UE devices (such as eMBB devices) may operate on an unlicensed frequency band, and it may be desirable to enable uplink cancellation on the unlicensed frequency band. However, devices operating on an unlicensed frequency band may be configured to perform a channel access procedure to help reduce potential interference, such as LBT. If a lower-priority UE device cancels its uplink transmission prematurely, then a third UE may start transmitting on the unlicensed frequency band before the higher-priority UE device can perform LBT and is transmitting. Similarly, if a lower-priority UE device cancels its uplink transmission too late, the higher-priority UE may detect the uplink transmission and determine that the unlicensed frequency band is in use and back off or not transmit. Additionally, a lower-priority UE device may have a cancellation capability, where the lower-priority UE device is able to cancel its uplink transmission at a specific time or cancel its transmission within a time window starting from a specific time with a certain accuracy. Thus, in accordance with aspects of the present disclosure, techniques for UL cancellation and channel access in an unlicensed frequency band may consider the LBT behavior of higher-priority UE devices and the cancellation capabilities of lower-priority UE devices. Initially,

[0108] To provide node-initiated UL cancellation in an unlicensed frequency band, three broad cancellation classes may be defined based on the LBE category of the higher-priority UE device. The first cancellation class may include scenarios in which the higher-priority UE device supports CAT-1. The second cancellation class may include scenarios in which the higher-priority UE device supports CAT-2, and the third cancellation class may include scenarios in which the higher-priority UE device supports CAT-4 and CAT-3. Each cancellation class may include subclasses based on whether the lower-priority UE device is able to cancel its uplink transmission at a specific time or whether the lower-priority UE device is able to cancel its transmission within a cancellation time window.

[0109] Initially, the gNB may determine which cancellation classes and subclasses are applicable, for example, based on the signaled UE capability information. For example, a UE device that supports uplink cancellation may transmit cancellation capability information for an unlicensed band to the gNB. This cancellation capability information may be transmitted, for example, as part of the capability signaling, such as in a UE capability information message sent as part of establishing a connection with the gNB. In some cases, this cancellation capability information may indicate whether the UE is able to cancel an uplink transmission at a specific time or specify a cancellation time tolerance or cancellation time window within which the UE may cancel an uplink transmission. In some cases, one or more classes of uplink cancellation tolerance categories may be defined. For example, one class may be defined for those UEs that support uplink cancellation at a specific time, another class may be defined for those UEs that support cancellation within a 10 μs window, another class may be defined for those UEs that support cancellation within a 20 μs window, etc., and the UE may indicate its uplink cancellation tolerance category. In other cases, uplink cancellation tolerance may be defined for certain classes of UEs (e.g., UL class 1, UL class 2, etc.). Similarly, higher-priority UE devices may indicate what cancellation classes they support.

[0110] Example of UE Uplink Cancellation Timing Diagram

[0111] Figure 9 An exemplary timing diagram in accordance with aspects of the present disclosure is shown. For purposes of consistency and clarity, for a timing diagram showing multiple UEs (e.g., UE1, UE2, etc.) in a single timeline Figures 9 to 12 In the timing diagram shown, UE1 represents a lower-priority UE device with a scheduled UL transmission being cancelled, UE2 represents a higher-priority UE device that may be scheduled to transmit in place of the cancelled uplink transmission, and the delegated UE represents another UE device. It should be understood that UE1 may also represent a group of one or more UEs, where one or more UEs are addressed together by a UL CI. In some cases where UE1 represents a group of one or more UEs with a hybrid cancellation tolerance, the most restrictive cancellation tolerance may be used for the group. For example, if a first UE in a group of one or more UEs supports uplink cancellation at a specific time, while a second UE in the group supports uplink cancellation within a cancellation time window, the gNB may use a cancellation subclass consistent with the second UE for the group of one or more UEs. It should be understood that Figures 9 to 12 the timing diagram shown assumes that UE1 has previously received a UL CI during a monitoring occasion with a scheduled cancellation time at time t1.

[0112] Figure 9The timing diagram shown illustrates an example of a first cancellation class (e.g., a higher priority UE device supports CAT-1 uplink transmission on an unlicensed band). In some cases, UEs configured to use the first cancellation class should start their UL transmissions within 16 μs of the cancellation of the UE being cancelled, i.e., UE1 stops transmitting, as this helps avoid allowing other UEs such as CAT-2, CAT-3, and CAT-4 devices to start transmitting.

[0113] Timing diagram 900 illustrates an exemplary UL cancellation in an unlicensed band where a higher priority UE device supports the first cancellation class and where a lower priority UE device such as UE1 901 can cancel a first uplink at a specific time. In such a scenario, if the gNB receives an indication that UE1 901 can cancel the first uplink transmission at a specific time 904, the gNB may schedule the cancellation of the first uplink transmission of UE1 901 at cancellation time t1 904 and also schedule the start of the second uplink 907 of UE2 902 within 16 μs of that cancellation. The gNB may schedule the cancellation of the first uplink of UE1 901 and the transmission of the second uplink 907 from UE2 902 such that there is a gap of less than 16 μs between the cancellation of UE1 901 and the transmission from UE2 902. In some cases, the scheduled cancellation of UE1 901 and the scheduled start of the second uplink transmission 907 of UE2 902 can be at the same time. The gNB may indicate to UE2 902 to use CAT-1 for the second uplink transmission 907 and indicate to UE2 902 the specific time to start the second uplink transmission 907. In some cases, the start and duration of the uplink transmission from the higher priority UE may be sent as start and length indicator value (SLIV) parameter values.

[0114] Timing diagram 910 shows an exemplary UL cancellation in an unlicensed band, where a higher-priority UE device supports a first cancellation class, and where a lower-priority UE device is able to cancel a first uplink associated with the lower-priority UE within a maximum gap time window. The maximum gap time window can be, for example, a period defined according to a standard or based on the sensing timing of other devices configured to operate on the unlicensed band. In some cases, the maximum gap time window can be a 16 μs time window. For example, if the gNB receives an indication that UE1 911 is able to cancel a first uplink transmission within a 16 μs cancellation time window 916 at cancellation time t1 913, the gNB may schedule the cancellation of the first uplink transmission of UE1 911 at cancellation time t1 913 and schedule the start of a second uplink transmission 915 from UE2 912 at time t2 914, where cancellation time t1 913 is the same as time t2 914. Since UE1 911 can cancel within 16 μs of cancellation time 913, scheduling the start of the second uplink transmission 915 of UE2 912 at the same time as cancellation time t1 913 ensures that the second uplink transmission 915 of UE2 912 starts within 16 μs of when UE1 911 stops transmitting. The gNB may indicate to UE2 912 to use CAT-1 for its uplink transmission and indicate to UE2 912 the specific time to start the uplink transmission 915.

[0115] The timing diagram 920 shows an exemplary UL cancellation in an unlicensed band, where a higher-priority UE device supports a first cancellation class, and where a lower-priority UE is able to cancel a first uplink associated with the lower-priority UE in a time window greater than the maximum gap time window. For example, the gNB may receive an indication that UE1 921 is able to cancel a first uplink transmission in a cancellation time window 925 that is Y μs long (such as 33 μs). The gNB may instruct UE2 922 to use CAT-1 for its uplink transmission and may instruct UE2 922 of a specific time to start a second uplink transmission 926. Since Y is greater than the 16 μs maximum gap time window, the gNB may schedule the cancellation of the first uplink transmission of UE1921 at cancellation time t1 923 and schedule the start of the second uplink transmission 926 from UE2 922 at time t2 924. In some cases, the cancellation time t1 923 may be the same as the time t2 924. Since UE1 921 may cancel the first uplink transmission until Y = 33 μs before the time t2 924 when the gNB schedules UE2 922 to start the second uplink, another device may potentially detect that the unlicensed band is idle during this time and start transmitting. To avoid this problem, the gNB may schedule UE2 922 to transmit a reservation transmission 927 on the unlicensed band during the cancellation time window 926 of UE1 921. UE2921 may start broadcasting the reservation transmission 927 using CAT-1 without using LBT. In some cases, the reservation transmission 927 may be scheduled to start at the start of the cancellation time window 926 (e.g., t1 - Y) 936. In some cases, the reservation transmission 927 may be scheduled to start at the maximum gap time window within the cancellation time window 926. For example, in the case of a 16 μs maximum gap time window, the reservation transmission 927 may be scheduled to start 16 μs after the start of the cancellation time window 926 (e.g., if t1 = t2, then t1 - Y + 16) 937.

[0116] In some cases, the reservation transmission 927 may include an extended cyclic prefix. In other cases, the reservation transmission 927 may include information from a dedicated SLIV table. In other cases, the reservation transmission 927 may include a portion of an existing SLIV table. In other cases, the reservation transmission 927 may include information about an upcoming transmission, a current transmission, or a previous transmission, such as size, length, etc. In still other cases, the reservation transmission 927 may be encoded based on another parameter (such as the LBT type of the transmitting device, power level information, the set of UEs making the transmission, etc.). In some cases, the content of the reservation transmission 927 may be repeated as needed to fill the time amount of the reservation transmission 927. It should be understood that the exact content of the reservation transmission 927 may vary as the reservation transmission 927 is intended to temporarily occupy a portion of the unlicensed band until the scheduled UE2 921 starts the second uplink transmission. In some cases, the start and duration of the reservation transmission may be sent as SLIV parameter values.

[0117] Timing diagram 930 shows an exemplary variation of timing diagram 920, where the reservation transmission is transmitted by a wireless device different from the higher priority UE device. Similar to timing diagram 920, the gNB may receive an indication that UE1 931 is able to cancel the first uplink transmission in a cancellation time window 935 that is Y μs long and greater than the 16 μs maximum gap time window. The gNB may instruct UE2 933 to perform its uplink transmission using CAT-1 and may instruct UE2 933 of the specific time to start the uplink transmission 939. The gNB may schedule the cancellation of the first uplink transmission of UE1 921 at cancellation time t1 935 and schedule the start of the second uplink transmission 941 from UE2 933 at time t2 939. In some cases, the cancellation time t1 935 may be the same as the time t2 939. The gNB may also schedule a reservation transmission 938 on the unlicensed band during the cancellation time window 934 of UE1 931 in a manner similar to that described above with respect to timing diagram 920. However, in some cases, the gNB may transmit the reservation transmission 938 instead of scheduling UE2 933 to transmit the reservation transmission 938. In other cases, the gNB may schedule a delegated UE 932 to transmit the reservation transmission 938. The delegated UE 932 may be any wireless device capable of performing an uplink transmission using CAT-1. The reservation transmission 938 of the delegated UE 932 may include information similar to the reservation transmission described above. Additionally, the reservation transmission 938 of the delegated UE 932 may be encoded with other parameters such as the power level of the delegated UE 932, the set of delegated UEs making the transmission, etc. In some cases, the delegated UE 932 may be a group of one or more UEs.

[0118] Figure 10Shows an exemplary timing diagram in accordance with aspects of the present disclosure. Figure 10 The timing diagram shown illustrates examples of a second cancellation class (e.g., a higher priority UE device supports CAT-2 uplink transmission on an unlicensed band). In these examples, the higher priority UE device may support CAT-2,16 with a fixed CCA period of 16 μs, where at least 4 μs of sensing must occur within the last 9 μs of the 16 μs CCA. For example, the gNB may receive an indication that a higher priority UE device supports CAT-2,16 for uplink transmission.

[0119] Timing diagram 1000 illustrates an exemplary UL cancellation in an unlicensed band, where a higher priority UE device supports a second cancellation class, and where a lower priority UE device such as UE1 1001 is able to cancel a first uplink at a specific time. In such a scenario, if the gNB receives an indication that UE1 1001 is able to cancel the first uplink transmission at a specific time, the gNB may schedule the cancellation of the first uplink transmission of UE1 1001 at cancellation time t1 1004 and schedule the start of a second uplink transmission of UE2 1002 at least 9 μs after cancellation time 1004 and no more than 16 μs after cancellation time 1004. The gNB may indicate to UE2 1002 to use CAT-2,16 for the second uplink transmission 1007 and indicate to UE2 1002 the specific time to start the second uplink transmission 1007.

[0120] Timing diagram 1010 illustrates an exemplary UL cancellation in an unlicensed band, where a higher priority UE device supports a second cancellation class, and where a lower priority UE device is able to cancel a first uplink associated with the lower priority UE at a time before the cancellation time. In this example, the higher priority UE device UE2 1012 may support CAT-2,16 with a fixed CCA period of 16 μs, and the maximum gap time window 1016 is 16 - 9 = 7 μs. In the case where UE1 indicates a specific number X cancellation time window, the gNB may schedule the cancellation time at least 16 - X μs before the second uplink starts at scheduling time t2 1014. For example, if UE1 1011 indicates the ability to cancel the first uplink transmission within the maximum gap time window 1016 (e.g., within 7 μs of the cancellation time), the gNB may indicate to UE1 1011 a cancellation time t1 1013 at least 9 μs before the scheduling time t2 1014 of UE2 1012 to start the second uplink transmission 1015 to allow for a medium sensing time 1018. In other cases, such as when an exact cancellation time window cannot be provided, the gNB may indicate to UE2 1012 to use CAT-1, as discussed above with respect to Figure 9 discussed.

[0121] Timing diagram 1020 illustrates an exemplary UL cancellation in an unlicensed band, where a higher-priority UE device supports a second cancellation class, and where a lower-priority UE is able to cancel a first uplink associated with the lower-priority UE in a time window greater than or equal to a maximum gap time window. In this example, the higher-priority UE device UE2 1022 may support CAT-2,16 with a fixed CCA period of 16 μs, and the maximum gap time window is 16 - 9 = 7 μs. In this example, the gNB may receive an indication that UE1 1021 is able to cancel a first uplink transmission in a cancellation time window 1026 that is Y μs long, where Y ≥ maximum gap time window. The gNB may instruct UE2 1022 to use CAT-2,16 for its uplink transmission and may instruct UE2 1022 of a specific time t2 1024 to start a second uplink transmission 1027. The gNB may also instruct UE1 1021 of a cancellation time t1 1023. The cancellation time t1 1023 may be any time between the time t2 1024 at which UE2 1022 starts transmission minus a medium sensing time 1025 (e.g., t2 - 9) and the time t2 1024 at which UE2 1022 starts transmission minus the CCA period (e.g., t2 - 16). To help avoid another device from transmitting, the gNB may schedule UE2 1022 to transmit a reservation transmission 1029 on the unlicensed band during the cancellation time window 1026. In some cases, the reservation transmission 1029 may be scheduled to start at the start of the cancellation time window 1026 (e.g., t1 - Y) 1028. For example, if UE1 1021 has indicated the exact time X for the cancellation time window 1026, the reservation transmission 1029 may be scheduled to start at t1 - X. The reservation transmission 1029 may be scheduled to end at the cancellation time t1 1023. This allows the unlicensed band to be reserved for UE2 1022 and provides time for sensing the unlicensed band prior to the second uplink transmission 1027. In this case, UE2 1022 supports CAT-1 transmission on the unlicensed band to perform the reservation transmission 1029 and also supports the ability to quickly switch from transmission to reception.

[0122] Timing diagram 1030 shows an exemplary variant of timing diagram 1020, where the reservation transmission is transmitted by a wireless device different from the higher-priority UE device. In this example, the higher-priority UE device UE2 1033 may support CAT-2,16 with a fixed CCA period of 16 μs, and the maximum gap time window is 16 - 9 = 7 μs. As in timing diagram 920, the gNB may receive an indication that UE1 1031 is able to cancel the first uplink transmission within a cancellation time window 1034 that is Y μs long, where Y ≥ the maximum gap time window. The gNB may instruct UE2 1033 to use CAT-2,16 for its uplink transmission and instruct UE2 1033 of a specific time t2 1040 to start a second uplink transmission 1042. The gNB may also instruct UE1 1031 of a cancellation time t1 1035. The cancellation time t1 1035 may be any time between the time t2 1042 when UE2 1033 starts transmission minus the medium sensing time 1036 (e.g., t2 - 9) and the time t2 1042 when UE2 1033 starts transmission minus the CCA period (e.g., t2 - 16). To help avoid another device transmitting on the unlicensed band, the gNB may schedule a reservation transmission 1037 on the unlicensed band during the cancellation time window 1034 of UE1 1031 in a manner similar to that described above with respect to timing diagram 1020. However, in some cases, the gNB may transmit the reservation transmission 1037 instead of scheduling UE2 1033 to transmit the reservation transmission 1037. In other cases, the gNB may schedule the delegated UE 1032 to transmit the reservation transmission 1037. The delegated UE 1032 may be any wireless device capable of using CAT-1 for uplink transmission.

[0123] Figure 11 Shows an exemplary timing diagram in accordance with aspects of the present disclosure. Figure 11 The illustrated timing diagram also shows an example of a second cancellation class (e.g., a higher-priority UE device supports CAT-2 uplink transmission on the unlicensed band). In these examples, the higher-priority UE device may support CAT-2,25 with a fixed CCA period of 25 μs, where one sensing period is at the start of the CCA period and another sensing period is at the end of the CCA period. For example, the gNB may receive an indication that the higher-priority UE device supports CAT-2,25 for uplink transmission.

[0124] Timing diagram 1100 shows an exemplary UL cancellation in an unlicensed band, where a higher-priority UE device supports a second cancellation class, and where a lower-priority UE device such as UE1 1101 is able to cancel a first uplink at a specific time. If the gNB receives an indication that UE1 1101 is able to cancel the first uplink transmission at a specific time, the gNB may schedule the cancellation of the first uplink transmission of UE1 1101 at cancellation time t1 1104 and schedule the start of the second uplink transmission of UE2 1102 at least 25 μs after cancellation time 1104. The gNB may indicate to UE2 1102 to use CAT-2,25 for the second uplink transmission 1107 and indicate to UE2 1102 the specific time to start the second uplink transmission 1107.

[0125] Timing diagram 1110 shows an exemplary UL cancellation in an unlicensed band, where a higher-priority UE device supports a second cancellation class, and where a lower-priority UE device is able to cancel a first uplink associated with the lower-priority UE at some time before the cancellation time. In this example, the higher-priority UE device UE2 1112 may indicate support for CAT-2,25 with a fixed CCA period of 25 μs, and the lower-priority UE device UE1 1111 may indicate the ability to cancel the first uplink transmission at cancellation time t1 1113 of Y μs. In the case where UE1 indicates a specific number Y of cancellation time windows 1114, the gNB may schedule UE2 1112 to start the second uplink transmission 1117 at time t2 1119 and indicate to UE1 1111 to cancel the first uplink transmission at cancellation time t1 1113 to allow for a 25 μs medium sensing time 1115. To help avoid another device from transmitting, the gNB may schedule UE2 1122 to transmit a reservation transmission 1118 on the unlicensed band during the cancellation time window 1114. In some cases, the reservation transmission 1118 may be scheduled to start at the start of the cancellation time window 1114 (e.g., t1 - Y 1120), and the reservation transmission may be scheduled to end at the start of the CCA period before the second uplink transmission 1117 (e.g., at time t2 - 25 1122). This allows the unlicensed band to be reserved for UE2 1112 and provides time for sensing the unlicensed band before the second uplink transmission 1117. In this case, UE2 1112 supports CAT-1 transmission on the unlicensed band to perform the reservation transmission 1118 and also supports the ability to quickly switch from transmission to reception.

[0126] Timing diagram 1130 shows an exemplary variant of timing diagram 1130, where the reservation transmission is transmitted by a wireless device different from the higher-priority UE device. In this example, the higher-priority UE device UE2 1133 may support CAT-2,25 with a fixed CCA period of 25 μs, and the lower-priority UE device UE1 1131 may indicate the ability to cancel the first uplink transmission during a cancellation time t1 1134 of Y μs. In the case where UE1 indicates a specific number Y of cancellation time windows, the gNB may schedule UE2 1133 to start the second uplink transmission 1142 at time t2 1140 and indicate to UE1 1131 to cancel the first uplink transmission at time t1 1134 to allow a 25-μs medium sensing time 1115. To help avoid another device transmitting on the unlicensed band, the gNB may schedule the reservation transmission 1137 on the unlicensed band during the cancellation time window 1136 of UE1 1131 in a manner similar to that described above with respect to timing diagram 1110. However, in some cases, the gNB may transmit the reservation transmission 1137 instead of scheduling UE2 1133 to transmit the reservation transmission 1137. In other cases, the gNB may schedule the delegated UE 1132 to transmit the reservation transmission 1137. The delegated UE 1132 may be any wireless device capable of performing uplink transmission using CAT-1.

[0127] Figure 12 Shows an exemplary timing diagram in accordance with aspects of the present disclosure. Figure 11 The timing diagrams shown also show an example of a third cancellation class (e.g., a higher-priority UE device supports CAT-3 and CAT-4 uplink transmissions on the unlicensed band). In these examples, the higher-priority UE device may support CAT-3 with a random backoff and a fixed contention window or CAT-4 with a random backoff and a variable contention window. For example, the gNB may receive an indication that one or more higher-priority UE devices support CAT-3 or CAT-4 for uplink transmission. In these cases, a maximum contention time window may be defined. For CAT-3, the maximum contention time window may be based on the fixed contention window, while for CAT-4, the maximum contention time window may be based on the maximum size of the variable contention window. In some cases, the third cancellation class may not be useful in a scenario where a single higher-priority UE device is scheduled. The third cancellation class may be more applicable when multiple higher-priority UE devices may be scheduled during the cancelled uplink time. In some cases, the gNB may signal the maximum contention time window to one or more UEs via signaling or DCI configured in RRC for one or more UEs. The gNB may signal to one or more UEs to use CAT-3 or CAT-4 for uplink transmission.

[0128] Timing diagram 1200 shows an exemplary UL cancellation in an unlicensed band, where higher priority UE devices such as UE2 1202 and UE3 1203 support a third cancellation class, and where lower priority UE devices such as UE1 1201 are able to cancel a first uplink at a specific time. If the gNB receives an indication that UE1 1201 is able to cancel the first uplink transmission at a specific time, the gNB may schedule the cancellation of the first uplink transmission of UE1 1201 at cancellation time t1 1204 and schedule the start of the second uplink transmission of UE2 1102 and UE3 1203 at time t2 1210, where time t2 1210 is equal to or greater than the maximum contention time window M 1206. Then, the UEs (here UE2 1202 and UE3 1203) contend during the contention window. In some cases, during contention, each UE may randomly select a time during the contention window to listen for other transmissions on the unlicensed band, and when the time for listening ends, if the unlicensed band is not in use (e.g., the received power is below a specific threshold), the UE may determine that it has acquired the unlicensed band and start transmission. When a UE successfully acquires the unlicensed band (here UE2 1202), the UE starts transmitting a reserved transmission 1208 on the unlicensed band during the remaining time of the maximum contention time window M 1206. After the maximum contention time window M 1206 ends, the UE (UE2 1202) that has successfully acquired the unlicensed band starts the second uplink transmission at time t2 1210.

[0129] Timing diagram 1220 shows an exemplary UL cancellation in an unlicensed band, where a higher-priority UE device supports a third cancellation class, and where a lower-priority UE device is able to cancel a first uplink associated with the lower-priority UE at some time before the cancellation time. In this example, the higher-priority UE devices, namely UE2 1222 and UE3 1223, may indicate support for CAT-3 or CAT-4, and the lower-priority UE device, namely UE1 1221, may indicate the ability to cancel the first uplink transmission at a cancellation time t1 1225 of Y μs (e.g., within a cancellation window 1226 of length Y μs). In such cases, gNB 1224 may schedule the cancellation of the first uplink transmission of UE1 1221 at cancellation time t1 1225 and schedule the start of the second uplink transmission of UE2 1222 and UE3 1223 at time t2 1229, where time t2 1229 is equal to or greater than the maximum contention time window M 1227. gNB 1224 may also schedule a first reservation transmission 1234 to be transmitted by any combination of UE2 1222, UE3 1223, gNB 1224, or a delegated UE (not shown). In some cases, the first reservation transmission 1234 may be scheduled to start at the start of the cancellation time window 1226 (e.g., t1 - Y 1230), and the first reservation transmission may be scheduled to end at the start of the maximum contention time window M 1227 (e.g., t2 - M 1232). Then, the UEs (here UE2 1222 and UE3 1223) contend during the contention window. In some cases, during contention, each UE may randomly select a time during the contention window to listen for other transmissions on the unlicensed band, and when the time for listening ends, if the unlicensed band is not in use (e.g., the received power is below a specific threshold), the UE may determine that it has acquired the unlicensed band and start transmission. When a UE successfully acquires the unlicensed band (here UE2 1222), the UE may start transmitting a second reservation transmission 1228 on the unlicensed band during the remaining time of the maximum contention time window M 1227. After the maximum contention time window M 1227 ends, the UE (UE2 1222) that has successfully acquired the unlicensed band starts the second uplink transmission at time t2 1236.

[0130] Exemplary UE Uplink Cancellation Method in Unlicensed Band

[0131] Figure 13AFIG. 1300 is a flow chart of a technique for communication in a wireless system in accordance with aspects of the present disclosure. At block 1302, cancellation capability information is received from a first user equipment. At block 1304, unlicensed frequency transmission capability information is received from a second user equipment. In some cases, the transmission capability information may be sent autonomously by the UE to the node or may be scheduled by the gNB for UE transmission. In some cases, the transmission capability information may be sent as part of the UE capability information. At block 1306, an uplink transmission in an unlicensed band is received from the first user equipment. At block 1308, a need for a higher priority uplink transmission by the second user equipment is determined. At block 1310, an uplink cancellation time for the first user equipment is scheduled based on the cancellation capability information and the unlicensed frequency transmission capability information. At block 1312, an uplink transmission time for the second user equipment is scheduled based on the cancellation capability information and the unlicensed frequency transmission capability information. At block 1314, an uplink cancellation request is transmitted to the first user equipment based on the scheduled uplink cancellation time. At block 1316, an uplink transmission time for a higher priority uplink transmission is transmitted to the second user equipment based on the scheduled uplink transmission time.

[0132] Figure 13B FIG. 1304 is a flow chart showing various ways of receiving the unlicensed frequency transmission capability information of step 1304 from a second user equipment. At block 1320, presenting an option where the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time. At block 1322, presenting an option where the cancellation capability information indicates that the first user equipment has a cancellation time capability equal to or less than the gap time period, and further includes scheduling a reserved transmission in the unlicensed band based on the cancellation time capability and the sensed sensing time. At block 1324, presenting an option where the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing the unlicensed band in use, the sensing having a sensing time period, where the cancellation capability information indicates that the first user equipment has a cancellation time capability longer than the gap time period, and further includes scheduling a reserved transmission in the unlicensed band based on the cancellation time capability and the uplink transmission time.

[0133] Figure 13CA flowchart showing an additional way to receive unlicensed frequency transmission capability information of step 1304 from a second user equipment according to aspects of the present disclosure. At block 1330, an option is presented where the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing whether the unlicensed band is in use. The sensing has a sensing time period, where the cancellation capability information indicates that the first user equipment has a cancellation time capability shorter than the sensing time period, and where the uplink cancellation time is scheduled based on the sensing time period. At block 1332, an option is presented where the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing whether the unlicensed band is in use. The sensing has a sensing time period, where the cancellation capability information indicates that the first user equipment has a cancellation time capability longer than the sensing time period, and further includes: scheduling a reserved transmission in the unlicensed band based on the cancellation time capability and the sensing time.

[0134] Figure 13D A flowchart showing an alternative way for communication in a wireless system according to aspects of the present disclosure. At block 1340, the maximum contention time window size can be determined based on the unlicensed frequency transmission capability information for the second user equipment. At block 1360, an indication of the maximum contention time window size can be transmitted to one or more user equipments, the one or more user equipments including at least the second user equipment, where the scheduled uplink transmission time for the second user equipment is based on the end of the maximum contention time window. At block 1380, a user equipment reception reserved transmission in the unlicensed band can be obtained from one or more user equipments.

[0135] Figure 13E A flowchart showing an alternative way for communication in a wireless system according to aspects of the present disclosure. At block 1350, the maximum contention time window size can be determined based on the unlicensed frequency transmission capability information for the second user equipment. At block 1352, an indication of the maximum contention time window can be transmitted to one or more user equipments, the one or more user equipments including at least the second user equipment, where the scheduled uplink transmission time for the second user equipment is based on the end of the maximum contention time window. At block 1354, a reserved transmission can be scheduled in the unlicensed band based on the cancellation time capability. At block 1356, a user equipment reception reserved transmission in the unlicensed band can be obtained from one or more user equipments.

[0136] Figure 14AFIG. 1400 is a flowchart of a technique for communication in a wireless system in accordance with aspects of the present disclosure. At block 1402, a second user equipment transmits unlicensed frequency transmission capability information. At block 1404, an uplink transmission time for the second user equipment is received based on the unlicensed frequency transmission capability. At block 1406, the second user equipment receives a request to reserve a transmission for transmission in an unlicensed band based on a cancellation time capability of a first user equipment and the uplink transmission time. At block 1408, the second user equipment transmits the reserved transmission in the unlicensed band. At block 1410, the second user equipment transmits a higher priority uplink transmission in the unlicensed band.

[0137] Figure 14B FIG. 1450 is a flowchart of an alternative manner for communication in a wireless system in accordance with aspects of the present disclosure. At block 1450, an indication of a maximum contention window size is received from a node, wherein an uplink transmission time for a second user equipment is based on an end of the maximum contention window. At block 1452, listening may be performed on the unlicensed band during the maximum contention window to determine that the unlicensed band is idle. For example, the listening may be based on a randomly selected amount of time within the maximum contention window, or may be a fixed amount of time. It should be understood that the random selection may refer to a number generated using any type of pseudo-random number generator. At block 1454, a reserved transmission is transmitted during the maximum contention window.

[0138] Figure 15 FIG. 1500 is a flowchart of a technique for communication in a wireless system in accordance with aspects of the present disclosure. At block 1502, a request to reserve a transmission for transmission in an unlicensed band is received based on a cancellation time capability of a first user equipment and an uplink transmission time. At block 1504, the reserved transmission is transmitted in the unlicensed band.

[0139] Figure 16 FIG. 1600 is a flowchart of a technique for communication in a wireless system in accordance with aspects of the present disclosure. At block 1602, a first user equipment transmits cancellation capability information. At block 1604, a second user equipment transmits unlicensed frequency transmission capability information. At block 1606, an uplink transmission within an unlicensed band is transmitted by the first user equipment. At block 1608, an uplink cancellation time for the first user equipment is received based on the cancellation capability information and the unlicensed frequency transmission capability information. At block 1610, an uplink transmission time for the second user equipment is received based on the cancellation capability information and the unlicensed frequency transmission capability information. At block 1612, the first user equipment cancels the uplink transmission. At block 1614, a higher priority uplink transmission is transmitted by the second user equipment based on the scheduled uplink transmission time.

[0140] Embodiments

[0141] In the following sections, additional embodiments are provided.

[0142] According to Embodiment 1, a method for communication in a wireless system is disclosed, including: receiving cancellation capability information from a first user equipment; receiving unlicensed frequency transmission capability information from a second user equipment; receiving an uplink transmission in an unlicensed band from the first user equipment; determining a need of the second user equipment for a higher priority uplink transmission; scheduling an uplink cancellation time for the first user equipment based on the cancellation capability information and the unlicensed frequency transmission capability information; scheduling an uplink transmission time for the second user equipment based on the cancellation capability information and the unlicensed frequency transmission capability information; transmitting an uplink cancellation request to the first user equipment based on the scheduled uplink cancellation time; and transmitting an uplink transmission time for the higher priority uplink transmission to the second user equipment based on the scheduled uplink transmission time.

[0143] Embodiment 2 includes the subject matter of Embodiment 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time.

[0144] Embodiment 3 includes the subject matter of Embodiment 2, wherein the cancellation capability information indicates that the first user equipment has a cancellation time capability equal to or less than a gap time period, and further includes: scheduling a reserved transmission in the unlicensed band based on the cancellation time capability and the sensed sensing time.

[0145] Embodiment 4 includes the subject matter of Embodiment 3, wherein the gap time period is based on a sensing interval, and wherein the scheduled uplink transmission time is after the gap time period.

[0146] Embodiment 5 includes the subject matter of Embodiment 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing the unlicensed band in use, the sensing having a sensing time period, wherein the cancellation capability information indicates that the first user equipment has a cancellation time capability longer than the gap time period, and further includes: scheduling a reserved transmission in the unlicensed band based on the cancellation time capability and the uplink transmission time.

[0147] Embodiment 6 includes the subject matter of Embodiment 5, and further includes transmitting an indication to the second user equipment to transmit the reserved transmission, wherein the scheduled reserved transmission is before the uplink transmission time.

[0148] Embodiment 7 includes the subject matter of Embodiment 5, and further includes transmitting the reserved transmission, wherein the scheduled reserved transmission is before the uplink transmission time.

[0149] Example 8 includes the subject matter of Example 5 and further includes transmitting an indication of the scheduled reserved transmission to a third user equipment, wherein the scheduled reserved transmission is before the uplink transmission time.

[0150] Example 9 includes the subject matter of Examples 1 to 8 and further includes transmitting an indication of transmitting the higher priority uplink transmission to the second user equipment without sensing that the unlicensed band is in use.

[0151] Example 10 includes the subject matter of Example 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing whether the unlicensed band is in use, the sensing having a sensing time period, wherein the cancellation capability information indicates that the first user equipment has a cancellation time capability shorter than the sensing time period, and wherein the uplink cancellation time is scheduled based on the sensing time period.

[0152] Example 11 includes the subject matter of Example 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing that the unlicensed band is in use, the sensing having a sensing time period, wherein the cancellation capability information indicates that the first user equipment has a cancellation time capability longer than the sensing time period, and further includes: scheduling a reserved transmission in the unlicensed band based on the cancellation time capability and the sensing time.

[0153] Example 12 includes the subject matter of Example 11 and further includes transmitting an indication of transmitting the reserved transmission to the second user equipment during the time period of the cancellation time capability of the first user equipment.

[0154] Example 13 includes the subject matter of Example 11 and further includes transmitting the reserved transmission during the time period of the cancellation time capability of the first user equipment.

[0155] Example 14 includes the subject matter of Example 11 and further includes transmitting an indication of transmitting the reserved transmission to a third user equipment during the time period of the cancellation time capability of the first user equipment.

[0156] Example 15 includes the subject matter of Examples 10 to 14 and further includes transmitting an indication of transmitting the higher priority uplink transmission to the second user equipment after sensing whether the unlicensed band is in use.

[0157] Example 16 includes the subject matter of Example 1 and further includes: determining a maximum contention time window size based on the unlicensed frequency transmission capability information for the second user equipment; transmitting an indication of the maximum contention time window size to one or more user equipment, the one or more user equipment including at least the second user equipment, wherein the scheduled uplink transmission time for the second user equipment is based on the end of the maximum contention time window; and obtaining a user equipment reception reservation transmission in the unlicensed band from the one or more user equipment.

[0158] Example 17 includes the subject matter of Example 16 and further includes: determining a maximum contention time window size based on the unlicensed frequency transmission capability information for the second user equipment; transmitting an indication of the maximum contention time window size to one or more user equipment, the one or more user equipment including at least the second user equipment, wherein the scheduled uplink transmission time for the second user equipment is based on the end of the maximum contention time window; scheduling a reservation transmission in the unlicensed band based on cancellation time capabilities; and obtaining a user equipment reception reservation transmission in the unlicensed band from the one or more user equipment.

[0159] Example 18 includes the subject matter of Example 17 and further includes transmitting an indication to the second user equipment to transmit the reservation transmission, wherein the scheduled reservation transmission is during the uplink cancellation time.

[0160] Example 19 includes the subject matter of Example 17 and further includes transmitting the reservation transmission, wherein the scheduled reservation transmission is during the uplink cancellation time.

[0161] Example 20 includes the subject matter of Example 17 and further includes transmitting an indication to a third user equipment to transmit the reservation transmission, wherein the scheduled reservation transmission is during the uplink cancellation time.

[0162] Example 21 includes the subject matter of Example 1, wherein the uplink transmission time includes an indication of the start time and duration of a higher priority data transmission.

[0163] Example 22 includes the subject matter of any one of Examples 3 to 8, 11 to 14, or 16 to 20, wherein the request to transmit a reservation transmission includes an indication of the start time and duration of the reservation transmission.

[0164] Example 23 includes the subject matter of any one of Examples 3 to 8, 11 to 14, or 16 to 20, wherein the reservation transmission includes a cyclic prefix encoded in a start and length indicator table.

[0165] Example 24 includes the subject matter of any one of Examples 3 to 8, 11 to 14, or 16 to 20, wherein the reserved transmission includes an indication of listen - before - talk type coding.

[0166] Example 25 includes the subject matter of any one of Examples 3 to 8, 11 to 14, or 16 to 20, and further includes an indication to transmit the content of the reserved transmission.

[0167] According to Example 26, a device is disclosed, comprising: an antenna; radio components operatively coupled to the antenna; and a processor operatively coupled to the radio components; wherein the device is configured to: receive cancellation capability information from a first user equipment; receive unlicensed frequency transmission capability information from a second user equipment; receive an uplink transmission in an unlicensed band from the first user equipment; determine a need of the second user equipment for a higher - priority uplink transmission; schedule an uplink cancellation time for the first user equipment based on the cancellation capability information and the unlicensed frequency transmission capability information; schedule an uplink transmission time for the second user equipment based on the cancellation capability information and the unlicensed frequency transmission capability information; transmit an uplink cancellation request to the first user equipment based on the scheduled uplink cancellation time; and transmit an uplink transmission time for the higher - priority uplink transmission to the second user equipment based on the scheduled uplink transmission time.

[0168] Example 27 includes the subject matter of Example 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time.

[0169] Example 28 includes the subject matter of Example 27, wherein the cancellation capability information indicates that the first user equipment has a cancellation time capability equal to or less than a gap time period, and wherein the device is further configured to: schedule a reserved transmission in the unlicensed band based on the cancellation time capability and the sensed sensing time.

[0170] Example 29 includes the subject matter of Example 28, wherein the gap time period is based on a sensing interval, and wherein the scheduled uplink transmission time is after the gap time period.

[0171] Example 30 includes the subject matter of Example 26, where the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing that the unlicensed band is in use, the sensing having a sensing time period, where the cancellation capability information indicates that the first user equipment has a cancellation time capability longer than the gap time period, and where the device is further configured to: schedule a reserved transmission in the unlicensed band based on the cancellation time capability and the uplink transmission time.

[0172] Example 31 includes the subject matter of Example 30, where the device is further configured to: transmit an indication to the second user equipment to transmit the reserved transmission, where the scheduled reserved transmission is before the uplink transmission time.

[0173] Example 32 includes the subject matter of Example 30, where the device is further configured to: transmit the reserved transmission, where the scheduled reserved transmission is before the uplink transmission time.

[0174] Example 33 includes the subject matter of Example 30, where the device is further configured to: transmit an indication to a third user equipment to transmit the reserved transmission, where the scheduled reserved transmission is before the uplink transmission time.

[0175] Example 34 includes the subject matter of Example 26, where the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing whether the unlicensed band is in use, the sensing having a sensing time period, where the cancellation capability information indicates that the first user equipment has a cancellation time capability shorter than the sensing time period, and where the uplink cancellation time is scheduled based on the sensing time period.

[0176] Example 35 includes the subject matter of Example 26, where the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing that the unlicensed band is in use, the sensing having a sensing time period, where the cancellation capability information indicates that the first user equipment has a cancellation time capability longer than the sensing time period, and where the device is further configured to: schedule a reserved transmission in the unlicensed band based on the cancellation time capability and the sensing time.

[0177] Example 36 includes the subject matter of Example 35, where the device is further configured to transmit an indication to the second user equipment to transmit the reserved transmission during the time period of the cancellation time capability of the first user equipment.

[0178] Example 37 includes the subject matter of Example 35, where the device is further configured to transmit the reserved transmission during the time period of the cancellation time capability of the first user equipment.

[0179] Example 38 includes the subject matter of Example 35, wherein the device is further configured to transmit an indication of the reserved transmission during a time period of the cancellation time capability of the first user equipment to a third user equipment.

[0180] Example 39 includes the subject matter of Example 26, wherein the device is further configured to: determine a maximum contention time window size based on the unlicensed frequency transmission capability information for the second user equipment; transmit an indication of the maximum contention time window size to one or more user equipment, the one or more user equipment including at least the second user equipment, wherein the scheduled uplink transmission time for the second user equipment is based on the end of the maximum contention time window; and obtain a reserved transmission from a user equipment in the unlicensed band among the one or more user equipment.

[0181] Example 40 includes the subject matter of Example 39, wherein the device is further configured to: determine a maximum contention time window size based on the unlicensed frequency transmission capability information for the second user equipment; transmit an indication of the maximum contention time window to one or more user equipment, the one or more user equipment including at least the second user equipment, wherein the scheduled uplink transmission time for the second user equipment is based on the end of the maximum contention time window; schedule a reserved transmission in the unlicensed band based on the cancellation time capability; and obtain a reserved transmission from a user equipment in the unlicensed band among the one or more user equipment.

[0182] Example 41 includes the subject matter of Example 40, wherein the device is further configured to: transmit an indication of the transmission of the reserved transmission to the second user equipment, wherein the scheduled reserved transmission is during the uplink cancellation time.

[0183] Example 42 includes the subject matter of Example 40, wherein the device is further configured to: transmit the reserved transmission, wherein the scheduled reserved transmission is during the uplink cancellation time.

[0184] Example 43 includes the subject matter of Example 40, wherein the device is further configured to: transmit an indication of the transmission of the reserved transmission to a third user equipment, wherein the scheduled reserved transmission is during the uplink cancellation time.

[0185] Example 44 includes the subject matter of Example 26, wherein the uplink transmission time includes an indication of a start time and a duration of a higher priority data transmission.

[0186] According to Example 45, a method for communication in a wireless system is disclosed, including: transmitting unlicensed frequency transmission capability information from a second user equipment; receiving an uplink transmission time for the second user equipment based on the unlicensed frequency transmission capability; receiving, at the second user equipment, a request for a reserved transmission in an unlicensed band based on a cancellation time capability of a first user equipment and the uplink transmission time; transmitting, by the second user equipment, the reserved transmission in the unlicensed band; and transmitting, by the second user equipment, a higher priority uplink transmission in the unlicensed band.

[0187] Example 46 includes the subject matter of Example 45, and further includes: receiving an indication to sense the unlicensed band before transmitting the higher priority uplink transmission to determine whether the unlicensed band is in use; and sensing the unlicensed band before transmitting the higher priority uplink transmission to determine that the unlicensed band is not in use.

[0188] Example 47 includes the subject matter of Example 45, and further includes: receiving an indication to transmit the higher priority uplink transmission without sensing the unlicensed band as being in use.

[0189] Example 48 includes the subject matter of Example 45, and further includes: receiving an indication of a maximum contention window size from a node, wherein the uplink transmission time for the second user equipment is based on the end of the maximum contention window; listening on the unlicensed band during the maximum contention window to determine that the unlicensed band is idle; and transmitting a reserved transmission during the maximum contention window.

[0190] Example 49 includes the subject matter of Example 48, wherein the listening is based on a randomly selected amount of time within the maximum contention window.

[0191] Example 50 includes the subject matter of Example 45, wherein the uplink transmission time includes an indication of a start time and a duration of a higher priority data transmission.

[0192] Example 51 includes the subject matter of Example 45, wherein the request for transmitting the reserved transmission includes an indication of a start time and a duration of the reserved transmission.

[0193] Example 52 includes the subject matter of Example 45, wherein the reserved transmission includes an extended cyclic prefix.

[0194] Example 53 includes the subject matter of Example 45, wherein the reserved transmission includes one or more portions of a start and length indicator table.

[0195] Example 54 includes the subject matter of Example 45, wherein the reserved transmission includes an indication of listen-before-talk type coding.

[0196] Example 55 includes the subject matter of any one of Examples 45 to 54, and further includes an indication of receiving the content of the reserved transmission.

[0197] According to Example 56, a method for communication in a wireless system is disclosed, including: receiving, from a node, a request for transmitting a reserved transmission in an unlicensed band based on a cancellation time capability of a first user equipment and an uplink transmission time; and transmitting the reserved transmission in the unlicensed band.

[0198] Example 57 includes the subject matter of Example 56, wherein the request for transmitting the reserved transmission includes an indication of a start time and a duration of the reserved transmission.

[0199] Example 58 includes the subject matter of Example 56, wherein the reserved transmission includes a cyclic prefix encoded in a start and length indicator table.

[0200] Example 59 includes the subject matter of Example 56, wherein the reserved transmission includes an indication of a listen-before-talk type encoding.

[0201] Example 60 includes the subject matter of any one of Examples 56 to 59, and further includes an indication of receiving the content of the reserved transmission.

[0202] According to Example 61, a method for communication in a wireless system is disclosed, including: transmitting cancellation capability information from a first user equipment; transmitting unlicensed frequency transmission capability information from a second user equipment; transmitting an uplink transmission within an unlicensed band from the first user equipment; receiving an uplink cancellation time for the first user equipment based on the cancellation capability information and the unlicensed frequency transmission capability information; receiving an uplink transmission time for the second user equipment based on the cancellation capability information and the unlicensed frequency transmission capability information; canceling, by the first user equipment, the uplink transmission; and transmitting, by the second user equipment, a higher priority uplink transmission based on the scheduled uplink transmission time.

[0203] According to Example 62, a wireless device is disclosed, the wireless device including: an antenna; radio components operatively coupled to the antenna; and a processor operatively coupled to the radio components; wherein the wireless device is configured to: transmit unlicensed frequency transmission capability information from a second user equipment; receive an uplink transmission time for the second user equipment based on the unlicensed frequency transmission capability; receive, at the second user equipment, a request for transmitting a reserved transmission in an unlicensed band based on a cancellation time capability of a first user equipment and the uplink transmission time; transmit the reserved transmission in the unlicensed band by the second user equipment; and transmit a higher priority uplink transmission in the unlicensed band by the second user equipment.

[0204] Embodiment 63 includes the subject matter of Embodiment 62, wherein the wireless device is further configured to: receive an indication to sense the unlicensed band to determine whether the unlicensed band is in use before transmitting the higher-priority uplink transmission; and sense the unlicensed band to determine that the unlicensed band is not in use before transmitting the higher-priority uplink transmission.

[0205] Embodiment 64 includes the subject matter of Embodiment 62, wherein the wireless device is further configured to: receive an indication to transmit the higher-priority uplink transmission without sensing that the unlicensed band is in use.

[0206] Embodiment 65 includes the subject matter of Embodiment 62, wherein the wireless device is further configured to: receive an indication of a maximum contention window size from a node, wherein the uplink transmission time for the second user equipment is based on the end of the maximum contention window; listen on the unlicensed band during the maximum contention window to determine that the unlicensed band is idle; and transmit a reservation transmission during the maximum contention window.

[0207] Embodiment 66 includes the subject matter of Embodiment 65, wherein the listening is based on a randomly selected amount of time within the maximum contention window.

[0208] Embodiment 67 includes the subject matter of Embodiment 62, wherein the uplink transmission time includes an indication of a start time and a duration of a higher-priority data transmission.

[0209] Embodiment 68 includes the subject matter of Embodiment 62, wherein the request to transmit a reservation transmission includes an indication of a start time and a duration of the reservation transmission.

[0210] Embodiment 69 includes the subject matter of Embodiment 62, wherein the reservation transmission includes an extended cyclic prefix.

[0211] Embodiment 70 includes the subject matter of Embodiment 62, wherein the reservation transmission includes one or more portions of a start and length indicator table.

[0212] Embodiment 71 includes the subject matter of Embodiment 62, wherein the reservation transmission includes an indication of listen-before-talk type coding.

[0213] Embodiment 72 includes the subject matter of any one of Embodiments 62 to 71, wherein the wireless device is further configured to receive an indication of the content of the reservation transmission.

[0214] According to Example 73, a wireless device is disclosed. The wireless device includes: an antenna; radio components operatively coupled to the antenna; and a processor operatively coupled to the radio components; wherein the wireless device is configured to: receive a request for a reserved transmission to be transmitted in an unlicensed band from a node based on a cancellation time capability of a first user equipment and an uplink transmission time; and transmit the reserved transmission in the unlicensed band.

[0215] Example 74 includes the subject matter of Example 73, wherein the request for transmitting the reserved transmission includes an indication of a start time and a duration of the reserved transmission.

[0216] Example 75 includes the subject matter of Example 73, wherein the reserved transmission includes a cyclic prefix encoded in a start and length indicator table.

[0217] Example 76 includes the subject matter of Example 73, wherein the reserved transmission includes an indication of a listen-before-talk type of encoding.

[0218] Example 77 includes the subject matter of any one of Examples 73 to 76, and further includes receiving an indication of the content of the reserved transmission.

[0219] Another exemplary implementation may include a method, the method including: by a device: performing any or all parts of the foregoing examples.

[0220] Yet another exemplary implementation may include a non-transitory computer-accessible memory medium, the non-transitory computer-accessible memory medium including program instructions that, when executed at a device, cause the device to implement any or all parts of any one of the foregoing examples.

[0221] Another exemplary implementation may include a computer program, the computer program including instructions for performing any or all parts of any one of the foregoing examples.

[0222] Yet another exemplary implementation may include a device, the device including means for performing any or all elements of any one of the foregoing examples.

[0223] Another exemplary implementation may include a device, the device including a processor configured to cause the device to perform any element or all elements of any one of the foregoing examples.

[0224] It is well known that the use of personally identifiable information should follow privacy policies and practices that are recognized as meeting or exceeding industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of inadvertent or unauthorized access or use, and the nature of the authorized use should be clearly explained to the user.

[0225] Embodiments of the present disclosure can be implemented in any of a variety of forms. For example, some embodiments can be implemented as a computer-implemented method, a computer-readable memory medium, or a computer system. Other embodiments can be implemented using one or more custom-designed hardware devices such as an ASIC. Other embodiments can be implemented using one or more programmable hardware elements such as an FPGA.

[0226] In some embodiments, a non-transitory computer-readable memory medium can be configured such that it stores program instructions and / or data, where if the program instructions are executed by a computer system, the computer system is caused to execute a method, such as any one of the method embodiments described herein, or any combination of the method embodiments described herein, or any subset of any of the method embodiments described herein, or any combination of such subsets.

[0227] In some embodiments, a device (e.g., UE 106, BS 102, network element 600) can be configured to include a processor (or a set of processors) and a memory medium, where the memory medium stores program instructions, where the processor is configured to read and execute the program instructions from the memory medium, where the program instructions are executable to implement any one of the various method embodiments described herein (or any combination of the method embodiments described herein, or any subset of any of the method embodiments described herein, or any combination of such subsets). The device can be implemented in any of a variety of forms.

[0228] While the above embodiments have been described in considerable detail, many variations and modifications will become apparent to those skilled in the art once the above disclosure is fully understood. The present disclosure is intended that the following claims be construed to cover all such variations and modifications.

Claims

1. A method for communication in a wireless system performed by a second user equipment, the method comprising: Transmitting unlicensed frequency transmission capability information to a node; Receiving, based on the unlicensed frequency transmission capability, an uplink transmission time for the second user equipment from the node; Receiving, based on a cancellation time capability of a first user equipment and the uplink transmission time, a request for a reserved transmission in an unlicensed band from the node; Transmitting the reserved transmission in the unlicensed band; And Transmitting a higher priority uplink transmission to the node in the unlicensed band.

2. The method according to claim 1, further comprising: Receiving, from the node, an indication to sense the unlicensed band before transmitting the higher priority uplink transmission to determine whether the unlicensed band is in use; And Sensing the unlicensed band before transmitting the higher priority uplink transmission to determine that the unlicensed band is not in use.

3. The method according to claim 1, further comprising: Receiving an indication to transmit the higher priority uplink transmission without sensing the unlicensed band being in use.

4. The method according to claim 1, further comprising: Receiving, from the node, an indication of a maximum contention window size, wherein the uplink transmission time for the second user equipment is based on the end of the maximum contention window; Listening on the unlicensed band during the maximum contention window to determine that the unlicensed band is idle; And Transmitting the reserved transmission during the maximum contention window.

5. The method according to claim 4, wherein the listening is based on a randomly selected amount of time within the maximum contention window.

6. The method according to claim 1, wherein the uplink transmission time includes an indication of a start time and a duration of a higher priority data transmission.

7. The method according to claim 1, wherein the request for the reserved transmission includes an indication of a start time and a duration of the reserved transmission.

8. The method according to claim 1, wherein the reserved transmission includes an extended cyclic prefix.

9. The method according to claim 1, wherein the reserved transmission includes one or more parts of a start and length indicator table.

10. The method according to claim 1, wherein the reserved transmission includes an indication of listen-before-talk type coding.

11. The method according to any one of claims 1 to 10, further comprising receiving an indication of the content of the reserved transmission.

12. A method performed by a first user equipment, the method comprising: Receiving, based on the cancellation time capability of the first user equipment and an uplink transmission time, a request for a reserved transmission in an unlicensed band from a node; And Transmitting the reserved transmission in the unlicensed band.

13. The method according to claim 12, wherein the request for the reserved transmission includes an indication of a start time and a duration of the reserved transmission.

14. The method according to claim 12, wherein the reserved transmission includes a cyclic prefix encoded in a start and length indicator table.

15. The method according to claim 12, wherein the reserved transmission includes an indication of listen-before-talk type coding.

16. The method according to any one of claims 12 to 15, further comprising receiving an indication of the content of the reserved transmission.

17. A wireless device, the wireless device comprising: an antenna; radio components, the radio components being operatively coupled to the antenna; and a processor, the processor being operatively coupled to the radio components; wherein the wireless device is configured to: transmit unlicensed frequency transmission capability information to a node; receive, based on the unlicensed frequency transmission capability, an uplink transmission time for a second user equipment from the node; receive, based on a cancellation time capability of a first user equipment and the uplink transmission time, a request to transmit a reserved transmission in an unlicensed band from the node; transmit the reserved transmission in the unlicensed band; and transmit a higher priority uplink transmission to the node in the unlicensed band.

18. The wireless device according to claim 17, wherein the wireless device is further configured to: receive from the node an indication to sense the unlicensed band to determine whether the unlicensed band is in use before transmitting the higher priority uplink transmission; and sense the unlicensed band to determine that the unlicensed band is not in use before transmitting the higher priority uplink transmission.

19. The wireless device according to claim 17, wherein the wireless device is further configured to: receive from the node an indication to transmit the higher priority uplink transmission in the case where the unlicensed band is not sensed to be in use.

20. The wireless device according to claim 17, wherein the wireless device is further configured to: receive an indication of a maximum contention window size from the node, wherein the uplink transmission time for the second user equipment is based on the end of the maximum contention window; listen on the unlicensed band during the maximum contention window to determine that the unlicensed band is idle; and transmit a reserved transmission during the maximum contention window.

21. The wireless device according to claim 20, wherein the listening on the unlicensed band is based on a randomly selected amount of time within the maximum contention window.

22. The wireless device according to claim 17, wherein the uplink transmission time includes an indication of a start time and a duration of a higher priority data transmission.

23. The wireless device according to claim 17, wherein the request to transmit the reserved transmission includes an indication of a start time and a duration of the reserved transmission.

24. The wireless device according to claim 17, wherein the reserved transmission includes an extended cyclic prefix.

25. The wireless device according to claim 17, wherein the reserved transmission includes one or more portions of a start and length indicator table.

26. The wireless device according to claim 17, wherein the reserved transmission includes an indication of listen-before-talk type coding.

27. The wireless device according to any one of claims 17 to 26, wherein the wireless device is further configured to receive an indication of the content of the reserved transmission.

28. A wireless device, the wireless device comprising: an antenna; radio components, the radio components being operatively coupled to the antenna; and a processor, the processor being operatively coupled to the radio components; wherein the wireless device is configured to: receive a request to transmit a reserved transmission in an unlicensed band from a node based on the cancellation time capability of the wireless device and the uplink transmission time; and transmit the reserved transmission in the unlicensed band.

29. The wireless device according to claim 28, wherein the request to transmit the reserved transmission includes an indication of the start time and duration of the reserved transmission.

30. The wireless device according to claim 28, wherein the reserved transmission includes a cyclic prefix encoded in a start and length indicator table.

31. The wireless device according to claim 28, wherein the reserved transmission includes an indication of a listen-before-talk type of encoding.

32. The wireless device according to any one of claims 28 to 31, wherein the wireless device is further configured to receive an indication of the content of the reserved transmission.

33. A non-transitory computer-readable medium storing instructions that, when executed, cause a method according to any one of claims 1 to 16 to be performed.

34. A processor, comprising: an integrated circuit configured to perform a method according to any one of claims 1 to 16.

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