Method, device and medium for communication in a wireless system

Abstract

A technology for wireless communication in a wireless system, comprising: receiving cancellation capability information from a first user equipment; receiving unlicensed frequency transmission capability information from a second user equipment; receiving uplink transmission in an unlicensed frequency band from the first user equipment; determining the need of the second user equipment for 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.

Description

Technical Field

[0001] The present application relates to wireless devices, and more particularly to an apparatus, system, and method 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 phone 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 capabilities. In addition, 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, Advanced LTE (LTE-A), HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), IEEE 802.11 (WLAN or Wi-Fi), BLUETOOTH (BLUETOOTH), and UMTS (e.g., associated with WCDMA or TD-SCDMA air interfaces). TM wait.

[0003] The introduction of an ever-increasing number of features and functions in wireless communication devices also requires continuous improvements in wireless communications and improvements in wireless communication devices. In order to increase coverage and better serve the increased demand and range of intended uses of wireless communications, in addition to the above-mentioned communication standards, there are wireless communication technologies being developed, including fifth generation (5G) new air interface (NR) communications. Therefore, there is a need for improvements in the field of supporting such development and design. Summary of the invention

[0004] Embodiments relate to apparatus, 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. Certain wireless systems include different categories of UEs associated with different priorities. For example, a 5G-NR system may include an enhanced mobile broadband (eMBB) device, which may include traditional UE devices, such as mobile devices, wireless devices, computing devices, etc., and ultra-reliable low-latency communication (URLLC) devices. It is worth noting that the 5G-NR system may include other categories of devices that have been omitted for clarity but to which the techniques discussed herein may be applied. These URLLC devices are devices that support emerging delay-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 require a relatively large amount of bandwidth with minimal delay (e.g., low latency). To help provide low latency, URLLC devices may take precedence over eMBB devices. As part of prioritization, the scheduled uplink period of eMBB may be canceled before the transmission eMBB completes the transmission.

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

[0007] According to various aspects of the present disclosure, a technology for wireless communication in a wireless system includes: receiving cancellation capability information from a first user device; receiving unlicensed frequency transmission capability information from a second user device; receiving uplink transmission in an unlicensed frequency band from the first user device; determining the need of the second user device for a higher priority uplink transmission; scheduling an uplink cancellation time for the first user device based on the cancellation capability information and the unlicensed frequency transmission capability information; scheduling an uplink transmission time for the second user device based on the cancellation capability information and the unlicensed frequency transmission capability information; transmitting an uplink cancellation request to the first user device based on the scheduled uplink cancellation time; and transmitting an uplink transmission time for the higher priority uplink transmission to the second user device based on the scheduled uplink transmission time.

[0008] In some aspects, the technology may also include the following case, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed frequency band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time. In some aspects, the technology may also include the following case, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed frequency band is in use, and 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 frequency band based on the cancellation time capability and the sensed sensing time. In some aspects, the technology may also include the following case, wherein 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 frequency band based on the cancellation time capability and the uplink transmission time. In some aspects, the technology may also include the following case, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing that the unlicensed frequency band is in use, the sensing has 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. In some aspects, the technology may also include the following case, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing that the unlicensed frequency band is in use, the sensing has 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. In some aspects, the technology may also include the following situations, including: 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 receiving reserved transmission in the unlicensed frequency band from the one or more user equipment.

[0009] The techniques described herein may be implemented in and / or used with a number of different types of devices, including, but not limited to, any of cellular telephones, tablet computers, wearable computing devices, portable media players, and a variety of other computing devices.

[0010] This disclosure is intended to provide a brief overview of some of the topics described in this document. Therefore, it should be understood that the above features are only examples and should not be construed as narrowing the scope or essence of the topics described herein in any way. Other features, aspects, and advantages of the topics described herein will become apparent through the following detailed description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] A better understanding of the present subject matter may be obtained when the following detailed description of various embodiments is considered in conjunction with the following drawings, in which:

[0012] Figure 1 illustrating an exemplary wireless communication system according to some embodiments;

[0013] Figure 2 illustrates a base station (BS) in communication with a user equipment (UE) device according to some embodiments;

[0014] Figure 3 An exemplary block diagram of a UE according to some embodiments is shown;

[0015] Figure 4 illustrates an exemplary block diagram of a BS according to some embodiments;

[0016] Figure 5 illustrates an exemplary block diagram of a cellular communication circuit according to some embodiments;

[0017] Figure 6 illustrates an exemplary block diagram of a network element according to some embodiments;

[0018] Figure 7 An exemplary timing diagram illustrating uplink cancellation according to aspects of the present disclosure;

[0019] Figure 8 is a timing diagram illustrating an unlicensed band channel access process according to aspects of the present disclosure;

[0020] Figures 9 to 12 shows an exemplary timing diagram according to aspects of the present disclosure;

[0021] Fig.13A is a flow chart illustrating a technique for communicating in a wireless system according to aspects of the present disclosure;

[0022] Fig. 13B is a flow chart illustrating various ways of receiving unlicensed frequency transmission capability information from a second user equipment according to aspects of the present disclosure;

[0023] Fig. 13Cis a flow chart illustrating an additional manner of receiving unlicensed frequency transmission capability information from a second user equipment according to aspects of the present disclosure;

[0024] Fig.13D and Fig.13E is a flow chart illustrating an optional approach for communicating in a wireless system according to aspects of the present disclosure;

[0025] Fig.14A is a flow chart illustrating a technique for communicating in a wireless system according to aspects of the present disclosure;

[0026] Fig. 14B is a flow chart illustrating an optional approach for communicating in a wireless system according to aspects of the present disclosure;

[0027] Fig.15 is a flow chart illustrating a technique for communicating in a wireless system according to aspects of the present disclosure; and

[0028] Fig.16 is a flow chart illustrating a technique for communicating in a wireless system in accordance with aspects of the present disclosure.

[0029] Although the features described herein are susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and described in detail herein. However, it should be understood that the drawings and detailed description thereof are not intended to limit this document to the specific forms disclosed, but on the contrary, the purpose is to cover all modifications, equivalents and alternatives that fall within the spirit and scope of the subject matter as defined by the appended claims. DETAILED DESCRIPTION

[0030] The following is a glossary of terms that may be used in this disclosure:

[0031] 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-ROM, floppy disk 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, for example, hard disk drive or optical storage device; registers or other similar types of memory elements, etc. The memory medium may also include other types of non-transitory memory or a combination thereof. In addition, the memory medium may be located in the first computer system executing the program, or may be located in a different second computer system 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 in different locations in different computer systems connected, for example, via a network. The memory medium may store program instructions (e.g., in the form of a computer program) that may be executed by one or more processors.

[0032] Carrier Media—storage media as described above and physical transmission media such as a bus, network, and / or other physical transmission media that carry signals such as electrical, electromagnetic, or digital signals.

[0033] Programmable hardware elements - include various hardware devices that include multiple programmable function blocks connected via programmable interconnects. Examples include FPGAs (field programmable gate arrays), PLDs (programmable logic devices), FPOAs (field programmable object arrays), and CPLDs (complex PLDs). Programmable function blocks can vary from fine-grained (combinational logic units or lookup tables) to coarse-grained (arithmetic logic units or processor cores). Programmable hardware elements may also be referred to as "configurable logic units."

[0034] Computer System—Any of various types of computing or processing systems, including a personal computer system (PC), a mainframe computer system, a workstation, a network appliance, an Internet appliance, a personal digital assistant (PDA), a television system, a grid computing system, or other devices or combinations of devices. In general, the term "computer system" can be broadly defined to encompass any device (or combination of devices) having at least one processor that executes instructions from a memory medium.

[0035] User Equipment (UE) (or "UE device") - any of various types of computer systems or devices that are mobile or portable and that perform wireless communications. Examples of UE devices include mobile phones or smart phones (e.g., iPhone TM , based on AndroidTM phones), portable gaming devices (e.g., Nintendo DS TM , PlayStation Portable TM 、Gameboy Advance TM , iPhone TM ), laptops, wearable devices (e.g., smart watches, smart glasses), PDAs, portable Internet devices, music players, data storage devices or other handheld devices, etc. In general, the term "UE" or "UE device" can be broadly defined to cover any electronic device, computing device and / or telecommunication device (or combination of devices) that can be easily transmitted by a user and capable of wireless communication.

[0036] Wireless Device—Any of various types of computer systems or devices that perform wireless communications. A wireless device may be portable (or mobile), or may be stationary or fixed at a certain location. A UE is an example of a wireless device.

[0037] Communication device - any of various types of computer systems or devices that perform communication, where the communication may be wired or wireless. A communication device may be portable (or mobile), or may be stationary or fixed at a location. A wireless device is an example of a communication device. A UE is another example of a communication device.

[0038] 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 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 wireless connectivity between a user device 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 may be applied to any wireless system.

[0039] Node—As used herein, the term “node” may refer to one or more devices associated with a cell that typically provides wireless connectivity between user equipment and a wired network.

[0040] Processing element (or processor) - refers to various elements or combinations of elements that are capable of performing functions in a device such as user equipment or cellular network equipment. Processing elements may include, for example, processors 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 above combinations.

[0041] Channel - a medium used to transmit information from a sender (transmitter) to a receiver. It should be noted that since the characteristics of the term "channel" may vary according to different wireless protocols, the term "channel" used in the present invention may be considered to be used in a manner that conforms to the standards of the type of device to which the term is used. In some standards, the channel width may be variable (e.g., depending on device capabilities, frequency band conditions, etc.). For example, LTE may support scalable channel bandwidths of 1.4MHz to 20MHz. In contrast, a WLAN channel may be 22MHz wide, while a Bluetooth channel may be 1Mhz 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.

[0042] Frequency band—The term “frequency band” has the full breadth of its ordinary meaning and includes at least a segment of the spectrum (eg, radio frequency spectrum) in which channels are used or set aside for the same purpose.

[0043] Unlicensed Band - The term "unlicensed band" has the full scope of its ordinary meaning and includes at least a segment of spectrum (e.g., radio frequency spectrum) that is available for public use without requiring a license to transmit on that segment of spectrum. Typically, devices operating in an unlicensed band are not subject to regulatory protection from interference and may be subject to power and other authorization restrictions. Examples of unlicensed band devices include unlicensed transmitter devices that comply with regulations in Part 15 of the Federal Communications Commission (FCC) Rules.

[0044] Automatic—refers to an action or operation being performed by a computer system (e.g., software executed by a computer system) or a device (e.g., a circuit, a programmable hardware element, an ASIC, etc.) without the need for the action or operation to be directly specified or performed by a user input. Thus, the term "automatic" is in contrast to an operation that is manually performed or specified by a user, where the user provides input to directly perform the operation. An automatic process may be initiated by input provided by a user, but the subsequent actions performed "automatically" are not specified by the user, i.e., are not performed "manually," where the user specifies each action to be performed. For example, a user filling out an electronic form by selecting each field and providing input specifying information (e.g., by typing in information, selecting checkboxes, radio selections, etc.) is manually filling out the form, even though the computer system must update the form in response to the user action. The form may be automatically filled out by a computer system, where the computer system (e.g., software executed on the computer system) analyzes the fields of the form and fills out the form without any user input specifying the answers to the fields. As indicated above, a user may invoke automatic filling out of a form, but not participate in the actual filling out of the form (e.g., the user does not manually specify the answers to the fields but rather they are automatically completed). This specification provides various examples of operations that are automatically performed in response to actions taken by a user.

[0045] Approximately - refers to a value that is close to a correct or exact value. For example, approximately can refer to a value that is within 1% to 10% of an exact (or desired) value. However, it should be noted that the actual threshold value (or tolerance) may depend on the application. For example, in some embodiments, "approximately" may mean within 0.1% of some specified or desired value, while in various other embodiments, the threshold value may be, for example, 2%, 3%, 5%, etc., depending on the expectations or requirements of a particular application.

[0046] Concurrency - refers to parallel execution or implementation, where tasks, processes, or programs are executed in an at least partially overlapping manner. For example, concurrency can be achieved using "strong" or strict parallelism, where tasks are executed (at least partially) in parallel on respective computing elements, or using "weak parallelism," where tasks are executed in an interleaved manner (e.g., by time multiplexing of execution threads).

[0047] Configured to - Various components may be described as being "configured to" perform one or more tasks. In such environments, "configured to" is a broad statement that generally means "having a structure" that performs one or more tasks during operation. Thus, a component can be configured to perform a task even when the component is not currently performing 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 statement that generally means "having a structure" that performs one or more tasks during operation. Thus, the component can be configured to perform a task even when the component is not currently turned on. Typically, the circuitry that forms the structure corresponding to "configured to" may include hardware circuitry.

[0048] For ease of description, various components may be described as performing one or more tasks. Such descriptions should be interpreted as including the phrase "configured to". The description of a component being configured to perform one or more tasks is expressly intended not to invoke 35 U.S.C. §112(f) interpretation of that component.

[0049] Exemplary Wireless Communication System

[0050] Now go to Figure 1 , shows a simplified example of a wireless communication system according to some embodiments. Note that Figure 1 The system is only one example of possible systems, and features of the present disclosure may be implemented in any of a variety of systems as desired.

[0051] As shown, the exemplary wireless communication system includes a base station 102A, which communicates with one or more user equipment 106A, user equipment 106B to user equipment 106N, etc. through a transmission medium. Each user equipment may be referred to as a "user equipment" (UE) in this article. Therefore, user equipment 106 is referred to as UE or UE device.

[0052] Base station (BS) 102A may be a base transceiver station (BTS) or a cell site ("cellular base station") and may include hardware to enable wireless communications with UEs 106A through 106N.

[0053] The communication area (or coverage area) of a base station may be referred to as a “cell.” The base station 102A and the user equipment 106 may be configured to communicate over a transmission medium using any of a variety of radio access technologies (RATs), which are also referred to as wireless communication technologies or telecommunication standards, such as GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces), LTE, LTE-Advanced (LTE-A), 5G New Radio (5G NR), HSPA, 3GPP2CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), etc.

[0054] As shown, base station 102A may also be configured to communicate with network 100 (e.g., a core network of a cellular service provider, a telecommunications network such as a public switched telephone network (PSTN), and / or the Internet, among other possibilities). Thus, base station 102A may facilitate communications between user devices and / or between user devices and network 100. In particular, cellular base station 102A may provide UE 106 with various communication capabilities, such as voice, SMS, and / or data services.

[0055] Base station 102A and other similar base stations (such as base stations 102B...102N) operating according to the same or different cellular communication standards can therefore be provided as a network of cells that can provide continuous or nearly continuous overlapping service to UE 106A-N and similar devices over a geographic area via one or more cellular communication standards.

[0056] Thus, although base station 102A may function as Figure 1 106A-N, but each UE 106 may also be able to receive signals from (and possibly be within communication range of) one or more other cells (which may be provided by base stations 102B-N and / or any other base stations), which may be referred to as "neighboring cells." Such cells may also be able to facilitate communications between user devices and / or between user devices and network 100. Such cells may include "macro" cells, "micro" cells, "pico" cells, and / or cells of any various other granularity of service area size. For example, in Figure 1 The base stations 102A-102B shown in FIG. 1 may be macro cells, while the base station 102N may be a micro cell. Other configurations are also possible.

[0057] In some embodiments, base station 102A may be a next generation base station, such as a 5G New Radio (5G NR) base station or "gNB". In some embodiments, the gNB may be connected to a legacy evolved packet core (EPC) network and / or to an NR core (NRC) / 5G core (5GC) network. In addition, a gNB cell may include one or more transition and reception points (TRPs). In addition, a UE capable of operating in accordance with 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 transmissions, 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 As shown, base station 102A and base station 102C are both shown serving UE 106A.

[0058] It should be noted that the 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, for example, WCDMA or TD-SCDMA air interface), LTE, LTE-A, 5G NR, HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), etc.), the UE 106 can 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, the UE 106 can also or alternatively be configured to communicate using one or more global navigation satellite systems (GNSS, such as 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.

[0059] Exemplary User Equipment (UE)

[0060] Figure 2 A user equipment 106 (e.g., one of devices 106A-106N) is shown in communication with a base station 102 according to some embodiments. The UE 106 may be a device with cellular communication capabilities, such as a mobile phone, handheld device, computer, laptop, tablet, smart watch or other wearable device, or indeed any type of wireless device.

[0061] 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 embodiments described in the present invention by executing such stored instructions. Alternatively or in addition, UE 106 may include a programmable hardware element, 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 of the method embodiments described herein or any part of any of the method embodiments described herein.

[0062] 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 communications. Typically, the radio component may include any combination of a baseband processor, an analog radio frequency (RF) signal processing circuit (e.g., including filters, mixers, oscillators, amplifiers, etc.) or a digital processing circuit (e.g., for digital modulation and other digital processing). Similarly, the radio component may use the aforementioned hardware to implement one or more receive chains and transmit chains. For example, UE 106 may share one or more portions of a receive chain and / or transmit chain between multiple wireless communication technologies such as those discussed above.

[0063] In some embodiments, the UE 106 may include a separate transmit chain and / or receive chain (e.g., including separate antennas and other radio components) for each wireless communication protocol with which it is configured to communicate. As another possibility, the UE 106 may include one or more radio components shared between multiple wireless communication protocols, and one or more radio components used uniquely by a single wireless communication protocol. For example, the UE 106 may include a shared radio component for communicating using either LTE or 5GNR (or, in various possibilities, either LTE or 1xRTT, or either LTE or GSM), and an independent radio component for communicating using each of Wi-Fi and Bluetooth. Other configurations are also possible.

[0064] Exemplary Communication Devices

[0065] Figure 3An exemplary simplified block diagram of a communication device 106 according to some embodiments is shown. Note that Figure 3 The block diagram of the communication device is only an example of a possible communication device. According to the embodiment, in addition to other devices, the communication device 106 can 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, a notebook or a portable computing device), a tablet computer and / or a combination of devices. As shown in the figure, the communication device 106 may include a group of components 300 configured to perform core functions. For example, the group of components may be implemented as a system on a chip (SOC), which may include parts for various purposes. Alternatively, the group of components 300 may be implemented as a separate component or a group of components for various purposes. This group of components 300 may be (e.g., communicatively; directly or indirectly) coupled to various other circuits of the communication device 106.

[0066] For example, the communication device 106 may include various types of memory (e.g., including NAND flash memory 310), input / output interfaces such as connector I / F 320 (e.g., for connecting to a computer system; a docking station; a charging station; input devices such as a microphone, camera, keyboard; output devices such as speakers; etc.), a display 360 that may be integrated with the communication device 106 or external to it, and wireless communication circuitry 330 (e.g., for LTE, LTE-A, NR, UMTS, GSM, CDMA2000, Bluetooth, Wi-Fi, NFC, GPS, etc.). In some embodiments, the communication device 106 may include wired communication circuitry (not shown), such as, for example, a network interface card for Ethernet.

[0067] 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 short- to medium-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.

[0068] In some embodiments, as further described below, the cellular communication circuitry 330 may include one or more receive chains (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 multiple RATs. Moreover, in some embodiments, the cellular communication circuitry 330 may include a single transmit chain that may switch between radio components dedicated to specific RATs. 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. A second radio component may be dedicated to a second RAT (e.g., 5G NR) and may communicate with a dedicated receive chain and a shared transmit chain.

[0069] The communication device 106 may also include and / or be configured for use with one or more user interface elements. The user interface elements may include various elements such as a display 360 (which may be a touch screen display), a keyboard (which may be a separate keyboard or may be implemented as part of a touch screen display), a mouse, a microphone and / or speakers, one or more cameras, one or more buttons, and / or any of a variety of other elements capable of providing information to a user and / or receiving or interpreting user input.

[0070] 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 .

[0071] As shown, the SOC 300 may include a processor 302 that may execute program instructions for the communication device 106 and a display circuit 304 that may perform graphics processing and provide display signals to a display 360. The one or more processors 302 may also be coupled to a memory management unit (MMU) 340 (which may be configured to receive addresses from the one or more processors 302 and convert those addresses to locations in a memory (e.g., memory 306, read-only memory (ROM) 350, NAND flash memory 310)), and / or to other circuits or devices (such as display circuit 304, wireless communication circuit 330, connector I / F 320, and / or 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.

[0072] As described above, the communication device 106 may be configured to communicate using wireless and / or wired communication circuits. 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-transient computer-readable memory medium), the processor 302 of the communication device 106 may be configured to implement part or all of the features described in the present invention. Alternatively (or in addition thereto), 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 thereto), in combination with one or more components in 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 part or all of the features described herein.

[0073] In addition, as described in the present invention, processor 302 may include one or more processing elements. Therefore, processor 302 may include one or more integrated circuits (ICs) configured to perform the functions of processor 302. In addition, each integrated circuit may include circuits (e.g., first circuits, second circuits, etc.) configured to perform the functions of one or more processors 302.

[0074] In addition, as described herein, wireless communication circuit 330 may include one or more processing elements. In other words, one or more processing elements may be included in wireless communication circuit 330. Therefore, wireless communication circuit 330 may include one or more integrated circuits (ICs) configured to perform the functions of wireless communication circuit 330. In addition, each integrated circuit may include circuits (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of wireless communication circuit 330.

[0075] Exemplary Base Station

[0076] Figure 4 An exemplary block diagram of a base station 102 according to some embodiments is shown. Note that Figure 4 The base station of is only one example of a possible base station. As shown, the base station 102 may include a processor 404 that may execute program instructions for the base station 102. The processor 404 may also be coupled to a memory management unit (MMU) 440 or other circuit or device, which may be configured to receive addresses from the processor 404 and convert these addresses to locations in memory (e.g., memory 460 and read-only memory (ROM) 450).

[0077] Base station 102 may include at least one network port 470. Network port 470 may be configured to couple to a telephone network and provide access to the telephone network described above. Figure 1and Figure 2 Multiple devices of the telephone network described in, such as UE device 106.

[0078] The network port 470 (or an additional network port) may also or alternatively be configured to couple to a cellular network, such as a core network of a cellular service provider. The core network may provide mobility-related services and / or other services to multiple devices, such as the UE device 106. In some cases, the network port 470 may be coupled to a telephone network via the core network, and / or the core network may provide a telephone network (e.g., in other UE devices served by the cellular service provider).

[0079] In some embodiments, base station 102 may be a next generation base station, for example, a 5G New Radio (5G NR) base station or "gNB". In such embodiments, base station 102 may be connected to a legacy Evolved Packet Core (EPC) network and / or to an NR Core (NRC) / 5G Core (5GC) network. In addition, base station 102 may be considered a 5G NR cell and may include one or more transition and reception points (TRPs). In addition, a UE capable of operating in accordance with 5G NR may be connected to one or more TRPs within one or more gNBs.

[0080] 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 a communication chain 432. The communication chain 432 may be a receive chain, a transmit chain, or both. The radio component 430 may be configured to communicate via various wireless communication standards, including but not limited to 5GNR, LTE, LTE-A, GSM, UMTS, CDMA2000, Wi-Fi, etc.

[0081] Base station 102 may be configured to perform wireless communications using multiple wireless communication standards. In some cases, base station 102 may include multiple radios that enable base station 102 to communicate according to multiple wireless communication technologies. For example, as one possibility, base station 102 may include an LTE radio component for performing communications according to LTE and a 5G NR radio component for performing communications according to 5GNR. In this case, base station 102 may be able to operate as both an LTE base station and a 5G NR base station. As another possibility, base station 102 may include a multimode radio component capable of performing communications according to any one of multiple wireless communication technologies (e.g., 5GNR and LTE, 5G NR and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc.).

[0082] As further described later herein, BS102 may include hardware and software components for implementing or supporting specific implementations of the features described herein. The processor 404 of the base station 102 may be configured to implement or support a portion or all of the embodiments 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 thereto), in combination with one or more of the other components 430, 432, 434, 440, 450, 460, 470, the processor 404 of the base station 102 may be configured to implement or support a portion or all of the embodiments of the features described herein.

[0083] In addition, as described herein, the 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., first circuits, second circuits, etc.) configured to perform the functions of the one or more processors 404.

[0084] In addition, as described herein, radio 430 may include one or more processing elements. Thus, radio 430 may include one or more integrated circuits (ICs) configured to perform the functions of radio 430. In addition, each integrated circuit may include a circuit (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of radio 430.

[0085] Exemplary Cellular Communications Circuitry

[0086] 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 cellular communication circuitry is merely one example of possible cellular communication circuitry; other circuitry, such as circuitry that includes or is coupled to sufficient antennas for different RATs to perform uplink activities using separate antennas, or circuitry that includes or is coupled to fewer antennas, such as circuitry that can be shared between multiple RATs, is also possible. According to some embodiments, cellular communication circuitry 330 may be included in a communication device such as communication device 106 described above. As described above, communication device 106 may be a user equipment (UE) device, a mobile device or station, a wireless device or station, a desktop computer or computing device, a mobile computing device (e.g., a laptop, notebook, or portable computing device), a tablet computer, and / or a combination of devices, among other devices.

[0087] Cellular communication circuitry 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, cellular communication circuitry 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, Figure 5 As 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).

[0088] As shown, the first modem 510 may include one or more processors 512 and a memory 516 in communication with the processor 512. The modem 510 may communicate with a radio frequency (RF) front end 530. The RF front end 530 may include circuits for transmitting and receiving radio signals. For example, the RF front end 530 may include a receiving circuit (RX) 532 and a transmitting circuit (TX) 534. In some embodiments, the receiving circuit 532 may communicate with a downlink (DL) front end 550, which may include circuits for receiving radio signals via an antenna 335a.

[0089] Similarly, the second modem 520 may include one or more processors 522 and a memory 526 in communication with the processor 522. The modem 520 may communicate with the RF front end 540. The RF front end 540 may include circuits for transmitting and receiving radio signals. For example, the RF front end 540 may include a receiving circuit 542 and a transmitting circuit 544. In some embodiments, the receiving circuit 542 may communicate with the DL front end 560, which may include circuits for receiving radio signals via the antenna 335b.

[0090] In some embodiments, the switch 570 may couple the transmit circuit 534 to an uplink (UL) front end 572. In addition, 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 the antenna 336. Thus, when the cellular communication circuit 330 receives an instruction to transmit according to a first RAT (e.g., via a transmit chain including the transmit circuit 534 and the UL front end 572) 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 including 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., via a transmit chain including the transmit circuit 544 and the UL front end 572) 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 including the transmit circuit 544 and the UL front end 572).

[0091] 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.

[0092] In addition, as described herein, the processors 512, 522 may include one or more processing elements. Thus, the processors 512, 522 may include one or more integrated circuits (ICs) configured to perform the functions of the processors 512, 522. In addition, each integrated circuit may include circuits (e.g., first circuits, second circuits, etc.) configured to perform the functions of the processors 512, 522.

[0093] In some embodiments, the cellular communication circuit 330 may include only one transmit / receive chain. For example, the cellular communication circuit 330 may not include the modem 520, the RF front end 540, the DL front end 560, and / or the antenna 335b. As another example, the cellular communication circuit 330 may not include the modem 510, the RF front end 530, the DL front end 550, and / or the antenna 335a. In some embodiments, the cellular communication circuit 330 may also not include the switch 570, and the RF front end 530 or the RF front end 540 may communicate with the UL front end 572, for example, directly.

[0094] Exemplary Network Elements

[0095] Figure 6 An exemplary block diagram of a network element 600 according to some embodiments is shown. 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 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 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 memory (e.g., memory 660 and read-only memory (ROM) 650)), or to other circuits or devices.

[0096] 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 a base station (e.g., eNB / gNB) and / or other network entities / devices by means of any of a variety of communication protocols and / or interfaces.

[0097] As further described later herein, network element 600 may include hardware and software components for implementing or supporting implementations of the features described herein. Processor 604 of core network element 600 may be configured to implement or support implementations 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, processor 604 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.

[0098] Uplink transmission canceled

[0099] Figure 7 An exemplary timing diagram 700 of an uplink cancellation 700 according to aspects of the present disclosure is shown. The timing diagram 700 includes a timeline of a lower priority UE device 702 and a 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 of a scheduled 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 multiple lower priority UE devices. In order to facilitate the cancellation of the scheduled uplink of the UE during the transmission, the UE may monitor the uplink cancellation indication (ULCI) during the defined UL CI monitoring opportunity 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). UL CI messages are useful for allowing individual cancellation of specific transmissions and / or repetitions. Upon receiving UL CI 710 during a monitoring opportunity, a 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, a 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 a complete uplink interval 706 of the lower priority UE device to pass. 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.

[0100] In some cases, the UL CI may include a 2D bitmap indicating the time and frequency resource regions that are cancelled. The UL CI defines the reference time region within which the UL CI is to be applied in terms of time and frequency. 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 of physical resources (such as a downlink resource grid) and parameters used to carry PDCCH / downlink control information (DCI), detect power levels on unlicensed bands, and determine that the detected power level is below a threshold power level.

[0101] Figure 8 8 is a timing diagram illustrating an unlicensed band channel access process 800 according to various aspects of the present disclosure. Because unlicensed bands are publicly accessible, other devices may transmit on the unlicensed bands. In addition, devices operating on unlicensed bands generally desire to try to minimize interference with other devices also operating on the unlicensed bands. In order to facilitate access to shared unlicensed bands, wireless devices such as UEs may be configured to listen before talking (LBT). In LBT, a wireless device listens on an unlicensed band that the wireless device wants to use to determine whether the unlicensed band is already in use. LBT may be implemented in a variety of ways. One specific implementation is load-based equipment (LBE), where channel sensing of an unlicensed band may be performed at any time as needed by the wireless device. Multiple categories of LBE may be defined for interoperability of multiple devices associated with a particular type of wireless network. For example, in some wireless networks, categories of LBT may be defined, and a wireless device may implement one or more categories of LBT. Figure 8 802 illustrates wireless transmissions 802 of an NR unlicensed band (NR-U) device over an unlicensed band over time 801 with an example of four LBT support categories (e.g., NR-U LBT category) 1 To 802 4 A device supporting Category 1 (CAT-1) 804 may immediately transmit 8022 on the unlicensed band without first listening 804 on the unlicensed band (e.g., without LBT). There may be other restrictions on CAT-1 devices, for example, the duration of a UL performed without LBT sensing may be limited to a certain amount of time, such as 584 μs.

[0102] Devices supporting Category 2 (CAT-2) can sense the licensed band within a fixed amount of time without a random backoff period. If the CAT-2 device senses 808 that no other device is transmitting during the CCA period, the CAT-2 device starts transmitting after the CCA period 806 ends. 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 808 other devices during the 25μs idle channel assessment (CCA) period 806. In some cases, wireless systems such as NR-U may define multiple CCA periods, each with specific sensing timing. For example, the UE may support CAT-2,25, where if the UE determines that the unlicensed band is idle, the UE may transmit immediately after the 25μs CCA. During the CCA, the UE may sense the unlicensed band during two sensing slots. The length of these sensing slots can be 9μs, where the first sensing slot occurs at the beginning of the CCA and the second sensing slot starts 16μs after the beginning of the CCA. Sensing that the unlicensed band is idle within a sensing timeslot occurs by detecting the power level on the unlicensed band and determining that the detected power within at least one sensing duration (such as 4μs within the sensing timeslot) is less than a predefined detection threshold. If the unlicensed band is sensed to be idle in these two sensing timeslots, the unlicensed band is considered to be idle under CAT-2,25. As another example, the UE may support CAT-2,16, where if the UE determines that the unlicensed band is idle, the UE may transmit immediately after a 16μs CCA. During the CCA, the UE may 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 5μs, where at least 4μs of the sensing must occur within the last 9μs of the 16μs CCA. It should be understood that 25μs and 16μs are exemplary CCA periods, and other CCA periods are possible.

[0103] 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.

[0104] 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.

[0105] 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 band, and it may be desirable to enable uplink cancellation on the unlicensed band. However, devices operating on unlicensed bands may be configured to perform channel access procedures, such as LBT, to help reduce potential interference. If a lower priority UE device cancels its uplink transmission too early, a third UE may begin transmitting on the unlicensed 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 band is in use and back off or not transmit. In addition, a lower priority UE device may have a cancellation capability, wherein the lower priority UE device is able to cancel its uplink transmission at a specific time, or cancel its uplink transmission with a certain accuracy within a time window from a specific time. Therefore, according to aspects of the present disclosure, techniques for UL cancellation and channel access in an unlicensed band may take into account the LBT behavior of a higher priority UE device and the cancellation capability of a lower priority UE device. Initially,

[0106] To provide node-initiated UL cancellation in an unlicensed band, three broad cancellation classes may be defined based on the LBE category of a higher priority UE device. A first cancellation class may include scenarios where a higher priority UE device supports CAT-1. A second cancellation class may include scenarios where a higher priority UE device supports CAT-2, and a third cancellation class may include scenarios where a higher priority UE device supports CAT-4 and CAT-3. Each cancellation class may include subclasses based on whether a lower priority UE device can cancel its uplink transmission at a specific time or whether a lower priority UE device can cancel its transmission within a cancellation time window.

[0107] Initially, the gNB may determine which cancellation class and subclass is applicable, for example, based on the signaled UE capability information. For example, a UE device that can support uplink cancellation may transmit cancellation capability information for unlicensed bands to the gNB. The cancellation capability information may be transmitted, for example, as part of capability signaling, such as in a UE capability information message sent as part of establishing a connection with the gNB. In some cases, the cancellation capability information may indicate whether the UE is able to cancel uplink transmissions at a specific time or specify a cancellation time tolerance or cancellation time window in which the UE can cancel uplink transmissions. In some cases, one or more classes of uplink cancellation tolerance categories may be defined. For example, a 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 class. 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.

[0108] Example of UE uplink cancellation timing diagram

[0109] Fig. 9 1 shows an exemplary timing diagram according to various aspects of the present disclosure. For the purpose of consistency and clarity, for a single timeline with multiple UEs (e.g., UE1, UE2, etc.), Figures 9 to 12 In the timing diagram shown, UE1 represents a lower priority UE device having a scheduled UL transmission that is being canceled, UE2 represents a high priority UE device that can be scheduled to make a transmission in place of the canceled 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 the one or more UEs are addressed together by the UL CI. In certain cases where UE1 represents a group of one or more UEs with mixed 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, and 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.

[0110] Fig. 9The timing diagram shown shows an example of a first cancellation class (e.g., a higher priority UE device supporting CAT-1 uplink transmissions on an unlicensed band). In some cases, UEs configured to use the first cancellation class should start their UL transmissions within 16 μs of when the cancelled UE, UE1, stops transmitting, as this helps avoid allowing other UEs such as CAT-2, CAT-3, and CAT-4 devices to start transmissions.

[0111] Timing diagram 900 illustrates 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 such as UE1 901 is able to cancel a first uplink transmission at a specific time. In such a scenario, if the gNB receives an indication that UE1 901 is able to cancel the first uplink transmission at a specific time 904, the gNB may schedule the cancellation of the first uplink transmission for UE1 901 at the cancellation time t1 904 and also schedule the start of the second uplink 907 for UE2 902 within 16 μs of the cancellation. The gNB may schedule the cancellation of the first uplink for 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 by UE1 901 and the transmission from UE2 902. In some cases, the scheduled cancellation by UE1 901 and the scheduled start of the second uplink transmission 907 for UE2 902 may be the same time. The gNB may indicate to UE2 902 that CAT-1 is used for the second uplink transmission 907 and may indicate to UE2 902 a 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 a start and length indicator value (SLIV) parameter value.

[0112] The timing diagram 910 illustrates an exemplary UL cancellation in an unlicensed band, wherein a higher priority UE device supports a first cancellation class and wherein a lower priority UE device is capable of canceling a first uplink transmission associated with the lower priority UE within a maximum gap time window. The maximum gap time window may be, for example, a time period defined in accordance with a standard or based on sensing timing of other devices configured to operate on the unlicensed band. In some cases, the maximum gap time window may be a 16 μs time window. For example, if the gNB receives an indication that UE1 911 is capable of canceling a first uplink transmission within a 16 μs cancellation time window 916 at a cancellation time t1 913, the gNB may schedule cancellation of the first uplink transmission of UE1 911 at cancellation time t1 913 and schedule a second uplink transmission 915 from UE2 912 starting at time t2 914, wherein the cancellation time t1 913 is the same as time t2 914. Since UE1 911 may cancel within 16 μs of the cancel time 913, scheduling UE2 912 to start the second uplink transmission 915 at the same time as the cancel 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 to UE2 912 a specific time to start the uplink transmission 915.

[0113] Timing diagram 920 illustrates 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 transmission associated with the lower priority UE in a time window that is greater than a 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 indicate to UE2 922 that CAT-1 is used for its uplink transmission and indicate to UE2 922 a specific time to begin 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 UE1 921 at cancellation time t1 923 and schedule the start of a second uplink transmission 926 from UE2 922 at time t2 924. In some cases, the cancellation time t1 923 may be the same as time t2 924. Since UE1 921 may cancel the first uplink transmission until Y=33 μs before the time t2 924 at which UE2 922 is scheduled 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. UE2 921 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 beginning (e.g., t1-Y) 936 of the cancellation time window 926. In some cases, the reservation transmission 927 may be scheduled to start at the maximum gap time window in the cancellation time window 926. For example, in the case of a maximum gap time window of 16 μs, the reservation transmission 927 may be scheduled at 16 μs (e.g., if t1=t2, then t1-Y+16) 937 after the beginning of the cancellation time window 926.

[0114] In some cases, the reserved transmission 927 may include an extended cyclic prefix. In other cases, the reserved transmission 927 may include information from a dedicated SLIV table. In other cases, the reserved transmission 927 may include a portion of an existing SLIV table. In other cases, the reserved transmission 927 may include information about an upcoming transmission, a current transmission, or a previous transmission, such as size, length, etc. In yet other cases, the reserved transmission 927 may be encoded based on another parameter (such as the LBT type of the transmitting device, power level information, a set of UEs performing transmissions, etc.). In some cases, the content of the reserved transmission 927 may be repeated as needed to fill up the amount of time for the reserved transmission 927. It should be understood that the exact content of the reserved transmission 927 may vary because the reserved transmission 927 is intended to temporarily occupy a portion of the unlicensed band until the UE2 921 is scheduled to start a second uplink transmission. In some cases, the start and duration of the reserved transmission may be sent as a SLIV parameter value.

[0115] Timing diagram 930 illustrates an exemplary variation of timing diagram 920 in which 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 indicate to UE2 933 that CAT-1 is used for its uplink transmission and indicate to UE2 933 a specific time to start 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 time t2 939. The gNB may also schedule the 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 the delegated UE 932 to transmit the reservation transmission 938. The delegated UE 932 may be any wireless device capable of uplink transmission using CAT-1. The reservation transmission 938 of the delegated UE 932 may include information similar to the reservation transmission described above. In addition, 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 that are transmitting, etc. In some cases, the delegated UE 932 may be a group of one or more UEs.

[0116] Fig.10An exemplary timing diagram according to aspects of the present disclosure is shown. Fig.10 The timing diagrams shown illustrate examples of a second cancellation class (e.g., a higher priority UE device supporting CAT-2 uplink transmissions 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 the higher priority UE device supports CAT-2,16 for uplink transmissions.

[0117] 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 transmission at a specific time. In such a scenario, if the gNB receives an indication that UE1 1001 is able to cancel a first uplink transmission at a specific time, the gNB may schedule 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 the cancellation time 1004 and no more than 16 μs after the cancellation time 1004. The gNB may indicate to UE2 1002 that a second uplink transmission 1007 is to be made using CAT-2,16 and indicate to UE2 1002 a specific time to start the second uplink transmission 1007.

[0118] 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 prior to 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 event that UE1 indicates a specific number X of cancellation time windows, the gNB may schedule a cancellation time at least 16-X μs before the second uplink starts at the scheduled 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 of at least 9 μs before the scheduled time t2 1014 of UE2 1012 to start the second uplink transmission 1015 to allow for an intermediate sensing time 1018. In other cases, such as where an exact cancellation time window cannot be provided, the gNB may indicate to UE2 1012 to use CAT-1, as described above with respect to Fig. 9 discussed.

[0119] 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 the first uplink transmission in a cancellation time window 1026 of Y μs, where Y ≥ maximum gap time window. The gNB may indicate to UE2 1022 that it is using CAT-2,16 for its uplink transmission and indicate to UE2 1022 a specific time t2 1024 to start a second uplink transmission 1027. The gNB may also indicate to UE1 1021 the cancellation time t1 1023. The cancellation time t1 1023 may be any time between the time t2 1024 at which UE2 1022 begins transmission minus the medium sensing time 1025 (e.g., t2-9) and the time t2 1024 at which UE2 1022 begins 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 begin at the beginning (e.g., t1-Y) 1028 of the cancellation time window 1026. For example, if UE1 1021 has indicated an exact time X for the cancellation time window 1026, the reservation transmission 1029 may be scheduled to begin at t1-X. The reservation transmission 1029 may 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 reserved transmission 1029 and also supports the ability to quickly switch from transmission to reception.

[0120] Timing diagram 1030 illustrates an exemplary variation of timing diagram 1020 in which the reserved transmission is transmitted by a wireless device other than 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 in a cancellation time window 1034 of Y μs length, where Y ≥ maximum gap time window. The gNB may indicate to UE2 1033 that it is using CAT-2,16 for its uplink transmission and indicate to UE2 1033 a specific time t2 1040 to start the second uplink transmission 1042. The gNB may also indicate to UE1 1031 a cancellation time t1 1035. The cancellation time t1 1035 may be any time between the time t2 1042 at which UE2 1033 begins transmission minus the medium sensing time 1036 (e.g., t2-9) and the time t2 1042 at which UE2 1033 begins transmission minus the CCA period (e.g., t2-16). To help prevent another device from 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 uplink transmission using CAT-1.

[0121] Fig.11 An exemplary timing diagram according to aspects of the present disclosure is shown. Fig.11 The timing diagrams shown also show examples of a second cancellation class (e.g., a higher priority UE device supporting CAT-2 uplink transmissions on an unlicensed band). In these examples, the higher priority UE device may support CAT-2,25 with a fixed CCA period of 25 μs, with one sensing period at the beginning of the CCA period and another sensing period 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 transmissions.

[0122] Timing diagram 1100 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 1101 is able to cancel a first uplink transmission 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 cancellation of the first uplink transmission of UE1 1101 at cancellation time t1 1104 and schedule the start of a second uplink transmission of UE2 1102 at least 25 μs after the cancellation time 1104. The gNB may indicate to UE2 1102 that the second uplink transmission 1107 is to be performed using CAT-2,25 and indicate to UE2 1102 a specific time to start the second uplink transmission 1107.

[0123] Timing diagram 1110 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 capable of canceling a first uplink transmission associated with the lower priority UE at a time prior to 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 in a cancellation time t1 1113 of Y μs. In the event that UE1 indicates a specific number Y cancellation time windows 1114, the gNB may schedule UE2 1112 to start a 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 begin at the beginning of the cancellation time window 1114 (e.g., t1-Y 1120) and may be scheduled to end at the beginning of the CCA period prior to 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 prior to the second uplink transmission 1117. In this case, UE2 1112 supports CAT-1 transmissions on the unlicensed band to perform the reservation transmission 1118 and also supports the ability to quickly switch from transmission to reception.

[0124] Timing diagram 1130 shows an exemplary variation of timing diagram 1130 where the reserved transmission is transmitted by a different wireless device than 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 in a cancellation time t1 1134 of Y μs. In the event that UE1 indicates a specific number Y cancellation time windows, the gNB may schedule UE2 1133 to start a 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 for a 25 μs medium sensing time 1115. To help prevent another device from transmitting on the unlicensed band, the gNB may schedule a reservation transmission 1137 on the unlicensed band during the cancellation time window 1136 for 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 uplink transmission using CAT-1.

[0125] Fig.12 An exemplary timing diagram according to aspects of the present disclosure is shown. Fig.11 The timing diagram shown also shows an example of a third cancellation class (e.g., a higher priority UE device supports CAT-3 and CAT-4 uplink transmissions on an 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 a fixed contention window, while for CAT-4, the maximum contention time window may be based on a maximum size of a variable contention window. In some cases, the third cancellation class may not be useful in scenarios 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 the one or more UEs. The gNB may signal the one or more UEs to use CAT-3 or CAT-4 for uplink transmission.

[0126] 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 transmission at a specific time. If the gNB receives an indication that UE1 1201 is able to cancel a first uplink transmission at a specific time, the gNB may schedule cancellation of the first uplink transmission of UE1 1201 at cancellation time t1 1204 and schedule the start of a second uplink transmission of UE2 1102 and UE3 1203 at time t2 1210, where time t2 1210 is equal to or greater than a maximum contention time window M 1206. The UEs (here UE2 1202 and UE3 1203) then contend during the contention window. In some cases, during contention, each UE may randomly select a time during the contention window to listen to other transmissions on the unlicensed band, and when the time for listening is over, if the unlicensed band is not in use (e.g., the received power is below a certain threshold), the UE may determine that it has acquired the unlicensed band and begin transmission. When the UE successfully acquires the unlicensed band (here UE2 1202), the UE begins transmitting the 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 that successfully acquires the unlicensed band (UE2 1202) begins a second uplink transmission at time t2 1210.

[0127] Timing diagram 1220 illustrates 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 capable of canceling a first uplink transmission associated with the lower priority UE at a time prior to the cancellation time. In this example, the higher priority UE devices, i.e., UE2 1222 and UE3 1223, may indicate support for CAT-3 or CAT-4, and the lower priority UE device, i.e., 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 a case, gNB 1224 may schedule 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. The gNB 1224 may also schedule a first reserved 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 reserved transmission 1234 may be scheduled to start at the beginning of the cancellation time window 1226 (e.g., t1-Y 1230), and may be scheduled to end at the beginning of the maximum contention time window M 1227 (e.g., t2-M 1232). The UEs (here UE2 1222 and UE3 1223) then compete during the contention window. In some cases, during contention, each UE may randomly select a time during the contention window to listen to 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 certain threshold), the UE may determine that it has acquired the unlicensed band and begin transmission. When the UE successfully acquires the unlicensed band (here UE2 1222), the UE may begin transmitting a second reserved transmission 1228 on the unlicensed band during the remainder of the maximum contention time window M 1227. After the maximum contention time window M 1227 ends, the UE that successfully acquires the unlicensed band (UE2 1222) begins a second uplink transmission at time t2 1236.

[0128] Exemplary UE uplink cancellation method in unlicensed band

[0129] Fig.13Ais a flow chart illustrating a technique 1300 for communicating in a wireless system according to 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 autonomously sent by the UE to the node, or may be scheduled by the gNB for transmission by the UE. 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 frequency 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 a second user equipment based on the scheduled uplink transmission time.

[0130] Fig. 13B 1 is a flow chart illustrating various ways of receiving the unlicensed frequency transmission capability information of step 1304 from the second user equipment according to various aspects of the present disclosure. At block 1320, an option is presented in which the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed frequency band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time. At block 1322, an option is presented in which the cancellation capability information indicates that the first user equipment has a cancellation time capability equal to or less than the gap period, and further includes scheduling a reserved transmission in the unlicensed frequency band based on the cancellation time capability and the sensing time of the sensing. At block 1324, an option is presented in which the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing that the unlicensed frequency band is in use, the sensing has a sensing period, wherein the cancellation capability information indicates that the first user equipment has a cancellation time capability longer than the gap period, and further includes scheduling a reserved transmission in the unlicensed frequency band based on the cancellation time capability and the uplink transmission time.

[0131] Fig. 13Cis a flow chart illustrating additional ways of receiving the unlicensed frequency transmission capability information of step 1304 from the second user equipment according to aspects of the present disclosure. At block 1330, a method is presented in which the unlicensed frequency transmission capability information indicates that the second user equipment supports an option of transmitting after sensing whether the unlicensed frequency 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. At block 1332, a method is presented in which the unlicensed frequency transmission capability information indicates that the second user equipment supports an option of transmitting after sensing whether the unlicensed frequency 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 comprising: scheduling a reserved transmission in the unlicensed frequency band based on the cancellation time capability and the sensing time.

[0132] Fig.13D is a flow chart illustrating an optional manner for communicating in a wireless system according to aspects of the present disclosure. At block 1340, a maximum contention time window size may be determined based on unlicensed frequency transmission capability information for a second user device. At block 1360, an indication of the maximum contention time window size may be transmitted to one or more user devices, the one or more user devices including at least the second user device, wherein a scheduled uplink transmission time for the second user device is based on an end of the maximum contention time window. At block 1380, a user device receiving a reserved transmission in an unlicensed frequency band may be obtained from the one or more user devices.

[0133] Fig.13E 1 is a flow chart illustrating an optional manner for communicating in a wireless system according to aspects of the present disclosure. At block 1350, a maximum contention time window size may be determined based on unlicensed frequency transmission capability information for a second user device. At block 1352, an indication of the maximum contention time window may be transmitted to one or more user devices, the one or more user devices including at least the second user device, wherein the scheduled uplink transmission time for the second user device is based on the end of the maximum contention time window. At block 1354, a reserved transmission may be scheduled in an unlicensed frequency band based on the cancellation time capability. At block 1356, a user device receiving the reserved transmission in the unlicensed frequency band may be obtained from the one or more user devices.

[0134] Fig.14A1 is a flow chart illustrating a technique 1400 for communicating in a wireless system according to aspects of the present disclosure. At block 1402, a second user device transmits unlicensed frequency transmission capability information. At block 1404, an uplink transmission time for the second user device is received based on the unlicensed frequency transmission capability. At block 1406, the second user device receives a request to transmit a reserved transmission in an unlicensed frequency band based on the cancellation time capability of the first user device and the uplink transmission time. At block 1408, the second user device transmits the reserved transmission in the unlicensed frequency band. At block 1410, the second user device transmits a higher priority uplink transmission in the unlicensed frequency band.

[0135] Fig. 14B 1 is a flow chart illustrating an optional manner for communication in a wireless system according to various 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, a listen may be performed on an unlicensed band during the maximum contention window to determine that the unlicensed band is idle. For example, the listen 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.

[0136] Fig.15 1 is a flow chart illustrating a technique 1500 for communicating in a wireless system in accordance with aspects of the present disclosure. At block 1502, a request is received to transmit a reservation transmission in an unlicensed frequency band based on a cancellation time capability and an uplink transmission time of a first user equipment. At block 1504, the reservation transmission is transmitted in the unlicensed frequency band.

[0137] Fig.16 1 is a flow chart illustrating a technique 1600 for communicating in a wireless system according to aspects of the present disclosure. At box 1602, a first user device transmits cancellation capability information. At box 1604, a second user device transmits unlicensed frequency transmission capability information. At box 1606, the first user device transmits an uplink transmission in an unlicensed frequency band. At box 1608, an uplink cancellation time for the first user device is received based on the cancellation capability information and the unlicensed frequency transmission capability information. At box 1610, an uplink transmission time for the second user device is received based on the cancellation capability information and the unlicensed frequency transmission capability information. At box 1612, the first user device cancels the uplink transmission. At box 1614, a higher priority uplink transmission is transmitted by the second user device based on the scheduled uplink transmission time.

[0138] Example

[0139] In the following sections, additional examples are provided.

[0140] According to embodiment 1, a method for communication in a wireless system is disclosed, comprising: receiving cancellation capability information from a first user equipment; receiving unlicensed frequency transmission capability information from a second user equipment; receiving uplink transmission in an unlicensed frequency band from the first user equipment; determining the 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.

[0141] 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 frequency band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time.

[0142] 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 the gap time period, and further includes: scheduling reserved transmission in the unlicensed band based on the cancellation time capability and the sensed sensing time.

[0143] Embodiment 4 includes the subject matter of embodiment 3, wherein the gap period is based on a sensing interval, and wherein the scheduled uplink transmission time is after the gap period.

[0144] 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 that the unlicensed frequency 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 that is longer than the gap time period, and further includes: scheduling reserved transmission in the unlicensed frequency band based on the cancellation time capability and the uplink transmission time.

[0145] Embodiment 6 includes the subject matter of Embodiment 5, further comprising transmitting, to the second user equipment, an indication to transmit the reserved transmission, wherein the scheduled reserved transmission is before the uplink transmission time.

[0146] Embodiment 7 includes the subject matter of embodiment 5, further comprising transmitting the reservation transmission, wherein the scheduled reservation transmission is before the uplink transmission time.

[0147] Embodiment 8 includes the subject matter of Embodiment 5, further comprising transmitting an indication to transmit the reserved transmission to a third user equipment, wherein the scheduled reserved transmission is before the uplink transmission time.

[0148] Embodiment 9 includes the subject matter of Embodiments 1 to 8, further comprising transmitting to the second user equipment an indication to transmit the higher priority uplink transmission if the unlicensed band is not sensed to be in use.

[0149] Embodiment 10 includes the subject matter of embodiment 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing whether the unlicensed frequency 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.

[0150] Embodiment 11 includes the subject matter of embodiment 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing that the unlicensed frequency 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 that is longer than the sensing time period, and further includes: scheduling reserved transmission in the unlicensed frequency band based on the cancellation time capability and the sensing time.

[0151] Embodiment 12 includes the subject matter of embodiment 11, further comprising transmitting to the second user equipment an indication to transmit the reserved transmission during the time period of the canceled time capability of the first user equipment.

[0152] Embodiment 13 includes the subject matter of embodiment 11, further comprising transmitting the reservation transmission during the time period of the canceled time capability of the first user equipment.

[0153] Embodiment 14 includes the subject matter of embodiment 11, further comprising transmitting to a third user equipment an indication to transmit the reserved transmission during the time period of the canceled time capability of the first user equipment.

[0154] Embodiment 15 includes the subject matter of Embodiments 10 to 14, further comprising transmitting to the second user equipment an indication to transmit the higher priority uplink transmission after sensing whether the unlicensed band is in use.

[0155] Embodiment 16 includes the subject matter of embodiment 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 receiving reserved transmission in the unlicensed frequency band from the one or more user equipment.

[0156] Embodiment 17 includes the subject matter of embodiment 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 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 reserved transmission in the unlicensed frequency band based on canceling the time capability; and obtaining a user equipment receiving the reserved transmission in the unlicensed frequency band from the one or more user equipment.

[0157] Embodiment 18 includes the subject matter of Embodiment 17, further comprising transmitting, to the second user equipment, an indication to transmit the reserved transmission, wherein the scheduled reserved transmission is during the uplink cancellation time.

[0158] Embodiment 19 includes the subject matter of embodiment 17, further comprising transmitting the reservation transmission, wherein the scheduled reservation transmission is during the uplink cancellation time.

[0159] Embodiment 20 includes the subject matter of Embodiment 17, further comprising transmitting an indication to a third user equipment to transmit the reserved transmission, wherein the scheduled reserved transmission is during the uplink cancellation time.

[0160] Embodiment 21 includes the subject matter of embodiment 1, wherein the uplink transmission time includes an indication of a start time and duration of the higher priority data transmission.

[0161] Embodiment 22 includes the subject matter of any of Embodiments 3-8, 11-14, or 16-20, wherein the request for a transmission reservation transmission includes an indication of a start time and duration of the reservation transmission.

[0162] Embodiment 23 includes the subject matter of any of Embodiments 3-8, 11-14, or 16-20, wherein the reservation transmission includes a cyclic prefix encoded in a start and length indicator table.

[0163] Embodiment 24 includes the subject matter of any of Embodiments 3-8, 11-14, or 16-20, wherein the reservation transmission includes an encoded indication of a listen-before-talk type.

[0164] Embodiment 25 includes the subject matter of any one of Embodiments 3 to 8, 11 to 14, or 16 to 20, and further includes an indication of transmitting the content of the reserved transmission.

[0165] According to embodiment 26, a device is disclosed, comprising: an antenna; a radio component, the radio component being operably coupled to the antenna; and a processor, the processor being operably coupled to the radio component; wherein the device is configured to: receive cancellation capability information from a first user device; receive unlicensed frequency transmission capability information from a second user device; receive uplink transmission within an unlicensed frequency band from the first user device; determine the need of the second user device for a higher priority uplink transmission; schedule an uplink cancellation time for the first user device based on the cancellation capability information and the unlicensed frequency transmission capability information; schedule an uplink transmission time for the second user device based on the cancellation capability information and the unlicensed frequency transmission capability information; transmit an uplink cancellation request to the first user device based on the scheduled uplink cancellation time; and transmit an uplink transmission time for the higher priority uplink transmission to the second user device based on the scheduled uplink transmission time.

[0166] Embodiment 27 includes the subject matter of Embodiment 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed frequency band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time.

[0167] Embodiment 28 includes the subject matter of embodiment 27, wherein 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 wherein the device is further configured to: schedule reserved transmission in the unlicensed band based on the cancellation time capability and the sensed sensing time.

[0168] Embodiment 29 includes the subject matter of embodiment 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.

[0169] Embodiment 30 includes the subject matter of embodiment 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing that the unlicensed frequency 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 that is longer than the gap time period, and wherein the device is further configured to: schedule reserved transmission in the unlicensed frequency band based on the cancellation time capability and the uplink transmission time.

[0170] Embodiment 31 includes the subject matter of embodiment 30, wherein the device is further configured to: transmit an indication to the second user equipment to transmit the reserved transmission, wherein the scheduled reserved transmission is before the uplink transmission time.

[0171] Embodiment 32 includes the subject matter of embodiment 30, wherein the device is further configured to: transmit the reservation transmission, wherein the scheduled reservation transmission is before the uplink transmission time.

[0172] Embodiment 33 includes the subject matter of embodiment 30, wherein the device is further configured to: transmit an indication to transmit the reserved transmission to a third user equipment, wherein the scheduled reserved transmission is before the uplink transmission time.

[0173] Embodiment 34 includes the subject matter of embodiment 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing whether the unlicensed frequency 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.

[0174] Embodiment 35 includes the subject matter of embodiment 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing that the unlicensed frequency 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 that is longer than the sensing time period, and wherein the device is further configured to: schedule reserved transmission in the unlicensed frequency band based on the cancellation time capability and the sensing time.

[0175] Embodiment 36 includes the subject matter of Embodiment 35, wherein the device is further configured to transmit, to the second user equipment, an indication to transmit the reserved transmission during the time period of the canceled time capability of the first user equipment.

[0176] Embodiment 37 includes the subject matter of Embodiment 35, wherein the device is further configured to transmit the reservation transmission during the time period of the canceled time capability of the first user equipment.

[0177] Embodiment 38 includes the subject matter of Embodiment 35, wherein the device is further configured to transmit, to a third user equipment, an indication to transmit the reserved transmission during the time period of the canceled time capability of the first user equipment.

[0178] Embodiment 39 includes the subject matter of embodiment 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 device; transmit an indication of the maximum contention time window size to one or more user devices, the one or more user devices including at least the second user device, wherein the scheduled uplink transmission time for the second user device is based on the end of the maximum contention time window; and obtain a user device receiving a reserved transmission in the unlicensed frequency band from the one or more user devices.

[0179] Embodiment 40 includes the subject matter of embodiment 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 device; transmit an indication of the maximum contention time window to one or more user devices, the one or more user devices including at least the second user device, wherein the scheduled uplink transmission time for the second user device is based on the end of the maximum contention time window; schedule reserved transmissions in the unlicensed frequency band based on canceling time capability; and obtain a user device in the unlicensed frequency band from the one or more user devices to receive the reserved transmission.

[0180] Embodiment 41 includes the subject matter of embodiment 40, wherein the device is further configured to: transmit an indication to the second user equipment to transmit the reserved transmission, wherein the scheduled reserved transmission is during the uplink cancellation time.

[0181] Embodiment 42 includes the subject matter of embodiment 40, wherein the device is further configured to: transmit the reservation transmission, wherein the scheduled reservation transmission is during the uplink cancellation time.

[0182] Embodiment 43 includes the subject matter of embodiment 40, wherein the device is further configured to: transmit an indication to transmit the reserved transmission to a third user equipment, wherein the scheduled reserved transmission is during the uplink cancellation time.

[0183] Embodiment 44 includes the subject matter of embodiment 26, wherein the uplink transmission time includes an indication of a start time and duration of the higher priority data transmission.

[0184] According to embodiment 45, a method for communication in a wireless system is disclosed, comprising: transmitting unlicensed frequency transmission capability information from a second user device; receiving an uplink transmission time for the second user device based on the unlicensed frequency transmission capability; receiving a request for transmitting a reserved transmission in an unlicensed band at the second user device based on a cancellation time capability of the first user device and the uplink transmission time; transmitting the reserved transmission in the unlicensed band by the second user device; and transmitting a higher priority uplink transmission in the unlicensed band by the second user device.

[0185] Embodiment 46 includes the subject matter of embodiment 45, and further includes: receiving an indication to sense the unlicensed band to determine whether the unlicensed band is in use before transmitting the higher priority uplink transmission; and sensing the unlicensed band to determine that the unlicensed band is not in use before transmitting the higher priority uplink transmission.

[0186] Embodiment 47 includes the subject matter of embodiment 45, further comprising: receiving an indication to transmit the higher priority uplink transmission without sensing that the unlicensed band is in use.

[0187] Embodiment 48 includes the subject matter of embodiment 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.

[0188] Embodiment 49 includes the subject matter of embodiment 48, wherein the monitoring is based on a randomly selected amount of time within the maximum contention window.

[0189] Embodiment 50 includes the subject matter of embodiment 45, wherein the uplink transmission time includes an indication of a start time and duration of the higher priority data transmission.

[0190] Embodiment 51 includes the subject matter of embodiment 45, wherein the request for a transmission reservation transmission includes an indication of a start time and duration of the reservation transmission.

[0191] Embodiment 52 includes the subject matter of embodiment 45, wherein the reservation transmission includes an extended cyclic prefix.

[0192] Embodiment 53 includes the subject matter of embodiment 45, wherein the reservation transmission comprises one or more portions of a start and length indicator table.

[0193] Embodiment 54 includes the subject matter of embodiment 45, wherein the reservation transmission comprises an encoded indication of a listen-before-talk type.

[0194] Embodiment 55 includes the subject matter of any one of Embodiments 45 to 54, further comprising receiving an indication of the content of the reserved transmission.

[0195] According to embodiment 56, a method for communication in a wireless system is disclosed, comprising: receiving a request from a node to transmit 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.

[0196] Embodiment 57 includes the subject matter of embodiment 56, wherein the request for a transmission reservation transmission includes an indication of a start time and duration of the reservation transmission.

[0197] Embodiment 58 includes the subject matter of embodiment 56, wherein the reservation transmission includes a cyclic prefix encoded in a start and length indicator table.

[0198] Embodiment 59 includes the subject matter of embodiment 56, wherein the reservation transmission comprises an encoded indication of a listen-before-talk type.

[0199] Embodiment 60 includes the subject matter of any one of Embodiments 56 to 59, further comprising receiving an indication of the content of the reserved transmission.

[0200] According to embodiment 61, a method for communication in a wireless system is disclosed, comprising: transmitting cancellation capability information from a first user device; transmitting unlicensed frequency transmission capability information from a second user device; transmitting an uplink transmission in an unlicensed frequency band from the first user device; receiving an uplink cancellation time for the first user device based on the cancellation capability information and the unlicensed frequency transmission capability information; receiving an uplink transmission time for the second user device based on the cancellation capability information and the unlicensed frequency transmission capability information; canceling the uplink transmission by the first user device; and transmitting a higher priority uplink transmission by the second user device based on the scheduled uplink transmission time.

[0201] According to embodiment 62, a wireless device is disclosed, which includes: an antenna; a radio component, which is capable of being operably coupled to the antenna; and a processor, which is capable of being operably coupled to the radio component; wherein the wireless device is configured to: transmit unlicensed frequency transmission capability information from a second user device; receive an uplink transmission time for the second user device based on the unlicensed frequency transmission capability; receive a request for transmitting a reserved transmission in an unlicensed frequency band at the second user device based on the cancellation time capability of the first user device and the uplink transmission time; transmit the reserved transmission in the unlicensed frequency band by the second user device; and transmit a higher priority uplink transmission in the unlicensed frequency band by the second user device.

[0202] 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 before transmitting the higher priority uplink transmission, sense the unlicensed band to determine that the unlicensed band is not in use.

[0203] 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.

[0204] 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 device 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.

[0205] Embodiment 66 includes the subject matter of embodiment 65, wherein the monitoring is based on a randomly selected amount of time within the maximum contention window.

[0206] Embodiment 67 includes the subject matter of embodiment 62, wherein the uplink transmission time includes an indication of a start time and duration of the higher priority data transmission.

[0207] Embodiment 68 includes the subject matter of embodiment 62, wherein the request for a transmission reservation transmission includes an indication of a start time and duration of the reservation transmission.

[0208] Embodiment 69 includes the subject matter of embodiment 62, wherein the reservation transmission includes an extended cyclic prefix.

[0209] Embodiment 70 includes the subject matter of embodiment 62, wherein the reservation transmission comprises one or more portions of a start and length indicator table.

[0210] Embodiment 71 includes the subject matter of embodiment 62, wherein the reservation transmission comprises an encoded indication of a listen-before-talk type.

[0211] Embodiment 72 includes the subject matter of any of Embodiments 62 to 71, wherein the wireless device is further configured to receive an indication of the content of the reserved transmission.

[0212] According to embodiment 73, a wireless device is disclosed, which includes: an antenna; a radio component that is operably coupled to the antenna; and a processor that is operably coupled to the radio component; wherein the wireless device is configured to: receive a request from a node to transmit a reserved transmission in an unlicensed band based on a cancellation time capability of a first user device and an uplink transmission time; and transmit the reserved transmission in the unlicensed band.

[0213] Embodiment 74 includes the subject matter of embodiment 73, wherein the request for a transmission reservation transmission includes an indication of a start time and duration of the reservation transmission.

[0214] Embodiment 75 includes the subject matter of embodiment 73, wherein the reservation transmission includes a cyclic prefix encoded in a start and length indicator table.

[0215] Embodiment 76 includes the subject matter of embodiment 73, wherein the reservation transmission comprises an encoded indication of a listen-before-talk type.

[0216] Embodiment 77 includes the subject matter of any one of Embodiments 73 to 76, further comprising receiving an indication of the content of the reserved transmission.

[0217] Yet another exemplary embodiment may include a method comprising: performing, by an apparatus: any or all of the foregoing examples.

[0218] Still another example embodiment may include a non-transitory computer-accessible storage medium including program instructions that, when executed at a device, cause the device to implement any or all portions of any of the foregoing examples.

[0219] Yet another exemplary embodiment may include a computer program including instructions for performing any or all portions of any of the foregoing examples.

[0220] Still another exemplary embodiment may include an apparatus including means for performing any or all of the elements of any of the preceding examples.

[0221] Yet another example embodiment may include an apparatus comprising a processor configured to cause the device to perform any or all elements of any of the foregoing examples.

[0222] It is understood that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of the authorized use should be clearly stated to users.

[0223] The embodiments of the present disclosure may be implemented in any of a variety of forms. For example, some embodiments may be implemented as computer-implemented methods, computer-readable storage media, or computer systems. Other embodiments may be implemented using one or more custom-designed hardware devices such as ASICs. Other embodiments may be implemented using one or more programmable hardware elements such as FPGAs.

[0224] In some embodiments, a non-transitory computer-readable storage medium may be configured such that it stores program instructions and / or data, wherein if the program instructions are executed by a computer system, the computer system is caused to perform 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 method embodiments described herein, or any combination of such subsets.

[0225] In some embodiments, a device (e.g., UE 106, BS 102, network element 600) may be configured to include a processor (or a group of processors) and a memory medium, wherein the memory medium stores program instructions, wherein the processor is configured to read and execute the program instructions from the memory medium, wherein the program instructions are executable to implement any of the various method implementations described herein (or any combination of the method implementations described herein, or any subset of any method implementation of the method implementations described herein, or any combination of such subsets). The device may be implemented in any of various forms.

[0226] Although the above embodiments have been described in considerable detail, numerous variations and modifications will become apparent to those skilled in the art once the above disclosure is fully appreciated. It is intended that the following claims be interpreted to encompass all such variations and modifications.

Claims

1. A method for communication in a wireless system, the method comprising: receiving cancel capability information from the first user equipment; receiving unlicensed frequency transmission capability information from a second user equipment; receiving an uplink transmission in an unlicensed frequency band from the first user equipment; determining a need for a higher priority uplink transmission by the second user equipment; 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; as well as An uplink transmission time for the higher priority uplink transmission is transmitted to the second user equipment based on the scheduled uplink transmission time.

2. The method according to claim 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed frequency band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time.

3. The method according to claim 2, wherein 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 the method further comprises: A reserved transmission is scheduled in the unlicensed frequency band based on the cancellation time capability and the sensed sensing time.

4. The method of claim 3, wherein the gap period is based on a sensing interval, and wherein the scheduled uplink transmission time is after the gap period.

5. The method according to claim 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission when the unlicensed frequency band is not sensed to be in use, the sensing has 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 the method further comprises: A reserved transmission is scheduled in the unlicensed frequency band based on the cancellation time capability and the uplink transmission time.

6. The method of claim 5, further comprising transmitting to the second user equipment an indication to transmit the reserved transmission, wherein the scheduled reserved transmission is prior to the uplink transmission time.

7. The method of claim 5, further comprising transmitting the reservation transmission, wherein the scheduled reservation transmission precedes the uplink transmission time.

8. The method of claim 5, further comprising transmitting an indication to a third user equipment to transmit the reserved transmission, wherein the scheduled reserved transmission is prior to the uplink transmission time.

9. The method of any one of claims 1 to 8, further comprising transmitting to the second user equipment an indication to transmit the higher priority uplink transmission if the unlicensed band is not sensed to be in use.

10. The method of claim 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing whether the unlicensed frequency 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.

11. The method according to claim 1, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing that the unlicensed frequency 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 the method further comprises: A reserved transmission is scheduled in the unlicensed frequency band based on the cancellation time capability and the sensing time.

12. The method of claim 11, further comprising transmitting to the second user equipment an indication to transmit the reserved transmission during the time period of the revoked time capability of the first user equipment.

13. The method of claim 11, further comprising transmitting the reservation transmission during the time period of the revoked time capability of the first user equipment.

14. The method of claim 11, further comprising transmitting to a third user equipment an indication to transmit the reserved transmission during the time period of the revoked time capability of the first user equipment.

15. The method of any one of claims 10 to 14, further comprising transmitting to the second user equipment an indication to transmit the higher priority uplink transmission after sensing whether the unlicensed band is in use.

16. The method according to claim 1, further comprising: 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 equipments, the one or more user equipments including at least the second user equipment, wherein a scheduled uplink transmission time for the second user equipment is based on an end of the maximum contention time window; as well as A user equipment that obtains the unlicensed frequency band from the one or more user equipments receives a reservation transmission.

17. The method according to claim 16, further comprising: 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 to one or more user equipments, the one or more user equipments including at least the second user equipment, wherein a scheduled uplink transmission time for the second user equipment is based on an end of the maximum contention time window; scheduling a reserved transmission in the unlicensed frequency band based on the cancellation time capability; as well as A user equipment that obtains the unlicensed frequency band from the one or more user equipments receives a reservation transmission.

18. The method of claim 17, further comprising transmitting to the second user equipment an indication to transmit the reserved transmission, wherein the scheduled reserved transmission is during the uplink cancellation time.

19. The method of claim 17, further comprising transmitting the reservation transmission, wherein the scheduled reservation transmission is during the uplink cancellation time.

20. The method of claim 17, further comprising transmitting an indication to a third user equipment to transmit the reserved transmission, wherein the scheduled reserved transmission is during the uplink cancellation time.

21. The method of claim 1, wherein the uplink transmission time comprises an indication of a start time and duration of a higher priority data transmission.

22. A method according to any one of claims 3 to 8, 11 to 14 or 16 to 20, wherein the request for a transmission reservation transmission comprises an indication of a start time and duration of the reservation transmission.

23. A method according to any one of claims 3 to 8, 11 to 14 or 16 to 20, wherein the reservation transmission comprises a cyclic prefix encoded in a start and length indicator table.

24. A method according to any one of claims 3 to 8, 11 to 14 or 16 to 20, wherein the reservation transmission comprises an encoded indication of a listen-before-talk type.

25. A method as claimed in any one of claims 3 to 8, 11 to 14 or 16 to 20, further comprising transmitting an indication of the content of the reserved transmission.

26. An apparatus for communication in a wireless system, the apparatus comprising: antenna; a radio operably coupled to the antenna; as well as a processor operatively coupled to the radio; The device is configured as follows: receiving cancel capability information from the first user equipment; receiving unlicensed frequency transmission capability information from a second user equipment; receiving an uplink transmission in an unlicensed frequency band from the first user equipment; determining a need for a higher priority uplink transmission by the second user equipment; 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; as well as An uplink transmission time for the higher priority uplink transmission is transmitted to the second user equipment based on the scheduled uplink transmission time.

27. The apparatus of claim 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission without sensing whether the unlicensed frequency band is in use, and wherein the uplink cancellation time is the same as the uplink transmission time.

28. The device according to claim 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: A reserved transmission is scheduled in the unlicensed frequency band based on the cancellation time capability and the sensed sensing time.

29. The apparatus of claim 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.

30. The device of claim 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission when the unlicensed frequency band is not sensed to be 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 a gap time period, and wherein the device is further configured to: A reserved transmission is scheduled in the unlicensed frequency band based on the cancellation time capability and the uplink transmission time.

31. The device of claim 30, wherein the device is further configured to: An indication to transmit the reserved transmission is transmitted to the second user equipment, wherein the scheduled reserved transmission is before the uplink transmission time.

32. The device of claim 30, wherein the device is further configured to: The reserved transmission is transmitted, wherein the scheduled reserved transmission is before the uplink transmission time.

33. The device of claim 30, wherein the device is further configured to: An indication to transmit the reserved transmission is transmitted to a third user equipment, wherein the scheduled reserved transmission is before the uplink transmission time.

34. The apparatus of claim 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing whether the unlicensed frequency 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.

35. The device of claim 26, wherein the unlicensed frequency transmission capability information indicates that the second user equipment supports transmission after sensing that the unlicensed frequency 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 wherein the device is further configured to: A reserved transmission is scheduled in the unlicensed frequency band based on the cancellation time capability and the sensing time.

36. The apparatus of claim 35, wherein the apparatus is further configured to transmit to the second user equipment an indication to transmit the reserved transmission during the time period of the revoked time capability of the first user equipment.

37. The apparatus of claim 35, wherein the apparatus is further configured to transmit the reservation transmission during the time period of the revoked time capability of the first user equipment.

38. The apparatus of claim 35, wherein the apparatus is further configured to transmit to a third user equipment an indication to transmit the reserved transmission during the time period of the revoked time capability of the first user equipment.

39. The device of claim 26, wherein the device is further configured to: 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 equipments, the one or more user equipments including at least the second user equipment, wherein a scheduled uplink transmission time for the second user equipment is based on an end of the maximum contention time window; and A user equipment that obtains the unlicensed frequency band from the one or more user equipments receives a reservation transmission.

40. The device of claim 39, wherein the device is further configured to: 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 to one or more user equipments, the one or more user equipments including at least the second user equipment, wherein a scheduled uplink transmission time for the second user equipment is based on an end of the maximum contention time window; scheduling a reserved transmission in the unlicensed frequency band based on the cancellation time capability; as well as A user equipment that obtains the unlicensed frequency band from the one or more user equipments receives a reservation transmission.

41. The device of claim 40, wherein the device is further configured to: An indication to transmit the reserved transmission is transmitted to the second user equipment, wherein the scheduled reserved transmission is during the uplink cancellation time.

42. The apparatus of claim 40, wherein the apparatus is further configured to transmit the reservation transmission, wherein the scheduled reservation transmission is during the uplink cancellation time.

43. The apparatus of claim 40, wherein the apparatus is further configured to transmit an indication to a third user equipment to transmit the reserved transmission, wherein the scheduled reserved transmission is during the uplink cancellation time.

44. The apparatus of claim 26, wherein the uplink transmission time comprises an indication of a start time and duration of a higher priority data transmission.

45. A non-transitory computer readable medium storing instructions that, when executed, cause the operations of the method of claims 1-20 to be performed.

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