Uplink data is transmitted at the beginning of a fixed frame period in frame-based equipment mode

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive an uplink grant message from a base station in a first fixed frame period (FFP) based on a frame-based equipment mode; and transmit data to the base station in a first portion of a second FFP based at least in part on information in the uplink grant message. Numerous other aspects are provided.

Description

[0001] Public domain

[0002] Aspects of the present disclosure relate generally to wireless communications and techniques and apparatus for transmitting uplink data at the beginning of a fixed frame period in a frame-based equipment mode.

[0003] background

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless communication network may include several base stations (BS) that can support communication of several user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from a BS to a UE, while uplinks (or reverse links) refer to the communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receiving Point (TRP), a New Radio (NR) BS, a 5G Node B, and the like.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different user equipment to communicate at city, country, region, and even global levels. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that adopt these technologies.

[0007] Overview

[0008] In some aspects, a wireless communication method performed by a user equipment (UE) may include: receiving an uplink grant message from a base station in a first fixed frame period (FFP) in a frame-based equipment (FBE) mode; and transmitting data to the base station in a first part of a second FFP based at least in part on information in the uplink grant message.

[0009] In some aspects, a wireless communication method performed by a base station may include: transmitting an uplink grant message to a UE in an FFP in an FBE mode; and receiving data from the UE in a first portion of a second FFP based at least in part on information in the uplink grant message.

[0010] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive an uplink grant message from a base station in a first FFP in FBE mode; and transmit data to the base station in a first portion of a second FFP based at least in part on information in the uplink grant message.

[0011] In some aspects, a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: transmit an uplink grant message to a UE in an FFP in an FBE mode; and receive data from the UE in a first portion of a second FFP based at least in part on information in the uplink grant message.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to perform the following operations: receiving an uplink grant message from a base station in an FFP in an FBE mode, and transmitting data to the base station in a first portion of a second FFP based at least in part on information in the uplink grant message.

[0013] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to perform the following operations: transmitting an uplink grant message to a user equipment UE in an FFP in an FBE mode; and receiving data from the UE in a first portion of a second FFP based at least in part on information in the uplink grant message.

[0014] In some aspects, an apparatus for wireless communication may include: a device for receiving an uplink grant message from a base station in an FFP in an FBE mode; and a device for transmitting data to the base station in a first part of a second FFP based at least in part on information in the uplink grant message.

[0015] In some aspects, an apparatus for wireless communication may include: a device for transmitting an uplink grant message to a UE in an FFP in an FBE mode; and a device for receiving data from the UE in a first part of a second FFP based at least in part on information in the uplink grant message.

[0016] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and as illustrated in the accompanying figures and specification.

[0017] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0020] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0021] Figure 2 is a block diagram conceptually illustrating an example of a base station and a UE in communication in a wireless communication network according to various aspects of the present disclosure.

[0022] Figure 3 An example of a fixed frame period (FFP) in accordance with various aspects of the present disclosure is illustrated.

[0023] Figure 4 An example of transmitting uplink data at the start of FFP in a frame-based equipment (FBE) mode in accordance with various aspects of the present disclosure is illustrated.

[0024] Figure 5 An example of transmitting uplink data at the start of FFP in FBE mode according to various aspects of the present disclosure is illustrated.

[0025] Figure 6 An example of transmitting uplink data at the start of FFP in FBE mode according to various aspects of the present disclosure is illustrated.

[0026] Figure 7 An example of transmitting uplink data at the start of FFP in FBE mode according to various aspects of the present disclosure is illustrated.

[0027] Figure 8An example of transmitting uplink data at the start of FFP in FBE mode according to various aspects of the present disclosure is illustrated.

[0028] Fig. 9 is a diagram illustrating example processes performed in some aspects by a UE according to various aspects of the present disclosure.

[0029] Fig.10 is a diagram illustrating example processes performed in some aspects by a base station in accordance with various aspects of the present disclosure.

[0030] Detailed Description

[0031] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. Specifically, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is independently or in combination with any other aspect of the present disclosure. In some respects, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0032] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0033] It should be noted that although various aspects may be described herein using terminology typically associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, such as 5G and later generations, including NR technologies.

[0034] Figure 11 is a diagram illustrating a wireless network 100 in which various aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include several BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, B node, gNB, 5G B node (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0035] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0036] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces, such as direct physical connections, virtual networks, and / or the like using any suitable transport network.

[0037] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0038] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. In some aspects, the macro BS may have a high transmit power level (e.g., 5 to 40 watts), while the pico BS, femto BS, and relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0039] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0040] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0041] Some UEs may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. In some aspects, MTC and eMTC UEs include robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a base station, another device (e.g., a remote device), or some other entity. In some aspects, a wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network) via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE 120 may be included inside a housing that accommodates components of UE 120, such as a processor component, a memory component, etc. In some aspects, the processor component and the memory component may be coupled together. In some aspects, processor components (eg, one or more processors) and memory components (eg, memories) may be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, and the like.

[0042] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0043] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. In some aspects, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0044] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described herein. Figure 1 Examples described.

[0045] Figure 2A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which may be Figure 1 One for each base station and one for each UE in the base station 110. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1.

[0046] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, position coding may be used to generate synchronization signals to convey additional information.

[0047] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0048] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 as well as other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0049] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other components of the base station 110 may perform one or more techniques associated with transmitting uplink data at the beginning of a fixed frame period (FFP) in a frame-based equipment (FBE) mode, as described in more detail elsewhere herein. FBE mode may refer to a mode in which fixed frames are used for transmissions in an unlicensed spectrum. In some aspects, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) may perform or direct some aspects of Fig. 9 The process of 900 Fig.10 1000, and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. In some aspects, the one or more instructions, when executed (e.g., directly, or after compilation, conversion, interpretation, etc.) by one or more processors of base station 110 and / or UE 120, may perform or direct in some aspects Fig. 9 The process of 900 Fig.10 The process 1000 of , and / or operations of other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, interpreting instructions, etc. The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0050] In some aspects, UE 120 may include: means for receiving an uplink grant message from a base station in a first FFP in FBE mode, means for transmitting data to the base station in a first portion of a second FFP based at least in part on information in the uplink grant message, and so on. In some aspects, such means may include combining Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0051] In some aspects, base station 110 may include: means for transmitting an uplink grant message to a UE in a first FFP in FBE mode, means for receiving data from the UE in a first portion of a second FFP based at least in part on information in the uplink grant message, and so on. In some aspects, such means may include in conjunction with Figure 2One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0052] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described herein. Figure 2 Examples described.

[0053] Transmissions on unlicensed carriers may require a transmitting device (such as a UE) to determine whether the carrier (frequency channel) is clear for transmission. Listen before talk or (or listen before transmit) (LBT) is a mechanism that the UE can use to sense whether a channel is clear (clear channel assessment). If the UE performs LBT on a channel and the channel is clear, this may be referred to as LBT success. If the UE performs LBT on a channel and the channel is not clear, this may be referred to as LBT failure.

[0054] Figure 3 An example 300 of an FFP according to various aspects of the present disclosure is illustrated.

[0055] FBE mode may include FFP for communicating in unlicensed spectrum. Figure 3 As shown in , the FFP used by a base station (e.g., a gNB) may have a channel occupation time (COT) portion for transmitting downlink communications. The gNB may share the COT portion with a UE to receive uplink communications. The FFP may have an idle period after the COT at the end of the FFP for performing the LBT procedure for the next FFP. The FFP may be 1 millisecond (ms), 2ms, 2.5ms, 4ms, 5ms, 10ms, etc. (including the idle period). The starting position of the FFP within every two radio frames (e.g., even radio frames) may be given by i*P, where i={0,1,...,20 / P-1}, and P is the FFP (in ms). The idle period for a given subcarrier spacing (SCS) may be a specified minimum idle period allowed divided by an upper limit value of Ts, where the minimum idle period allowed=max(5% of FFP, 100 microseconds (μs)), and Ts is the symbol duration for a given SCS. The idle period may not be less than 5% of the FFP.

[0056] The FFP configuration for FBE may be included in a system information block (e.g., SIB-1) or signaled in UE-specific radio resource control (RRC) signaling. For indication of LBT type for Cat-2 (25 μs) or Cat-4 (Category 4), if the network indicates FBE operation for fallback downlink and uplink grants, the UE may follow a mechanism whereby one 9 μs slot is measured within a 25 μs interval (e.g., single-shot LBT). UE transmission within the FFP may occur if a downlink signal or channel (such as a physical downlink control channel (PDCCH), synchronization signal block, physical broadcast channel, remaining minimum system information, group common PDCCH, etc.) is detected within the FFP. The same 2-bit field in the load-based equipment (LBE) mode may be used or reinterpreted to indicate FBE LBT type, cyclic prefix extension, and / or channel access priority class indication.

[0057] In Release 16 NR Unlicensed (NR-U), only the base station (e.g., gNB) can act as an initiating device, while the UE can only act as a responding device. The channel access rules can thus be as follows. If the gNB initiates COT, Cat-1 (Category 1) LBT may not apply, and the gNB may perform Cat-2 LBT immediately before FFP. If the gNB is to transmit a downlink burst in the gNB COT, the gNB may perform Cat-1 LBT if the gap with the previous downlink or uplink burst is within 16μs, and perform Cat-2 LBT if the gap is greater than 16μs. If the UE initiates COT, Cat-1 LBT and Cat-2 LBT may not apply. If the UE is to transmit an uplink burst in the gNB COT, the UE may perform Cat-1 LBT if the gap is within 16μs, and perform Cat-2 LBT if the gap is greater than 16μs. Note that Cat-2 LBT for FBE may be different from Cat-2 LBT in LBE (25μs or 16μs). In some aspects, a 9μs measurement may be required immediately before transmission, with at least 4μs used for measurement. This may be referred to as single-shot LBT.

[0058] As indicated above, Figure 3 are provided as examples. Other examples may differ from those described herein. Figure 3 Examples described.

[0059] Unlicensed spectrum may be used for ultra-reliable low latency communications (URLLC) and Industrial Internet of Things (IIoT) applications involving controlled environments. A controlled environment may be an environment that is controlled so that there will be no other radio access technologies (RATs) or other operators within the coverage area. The LBT procedure may thus always pass, even if the LBT procedure is performed for FBE devices. More generally, even if the factory owner or operator may clean up the environment, there may still be a probability that some other RATs are running. In some aspects, for Wi-Fi devices, access probes may be transmitted from the station even when no access points are deployed. The factory may enforce a rule that no Wi-Fi access points will be deployed within the factory floor, but it may be difficult to ensure that no employees carry smartphones. Thus, there is a small probability that the gNB LBT procedure may fail.

[0060] If a UE in FBE mode (where LBT is to be performed) has uplink data to transmit, but no downlink data for the gNB to transmit or if the gNB fails the LBT procedure, the UE may not transmit its uplink data. If the gNB LBT passes, the UE may wait until after the COT indicator processing time (in the first part of the FFP) before transmitting data. That is, the UE either does not transmit its data (causing service interruption) or wastes time before transmitting data.

[0061] According to various aspects described herein, a UE may transmit uplink data during a COT indicator processing time so that time resources of an FFP are not wasted. If the UE is able to transmit uplink data during an FFP without waiting until a later FFP, the service may not be interrupted. The UE may transmit uplink data in a first part of an FFP based at least in part on grant information received during a previous FFP. The first part may be one or more OFDM symbols, depending on the category of the UE. The UE may not have to rely on receiving a COT indicator from a successful LBT performed by a gNB. If the gNB LBT procedure is successful, the UE may not have to wait until after the COT processing time to transmit data. The UE can thereby avoid service interruption and not waste time resources.

[0062] Figure 4 An example 400 of transmitting uplink data at the start of FFP in FBE mode in accordance with various aspects of the present disclosure is illustrated. Figure 4 Base stations (BSs) 410 (eg, Figure 1 and 2 ) and UE 420 (eg, Figure 1 and 2 UE 120 depicted in ). Figure 4The operations are shown from the perspective of BS 410.

[0063] As indicated by reference numeral 430, BS 410 may transmit an uplink grant message in the first FFP to UE 420 in FBE mode. As indicated by reference numeral 435, BS 410 may optionally perform an LBT procedure at the end of the first FFP and in an idle period before the second FFP. The UE may transmit uplink data in the first portion of the second FFP based at least in part on the uplink grant message rather than as a result of the LBT procedure performed by BS 410. Accordingly, as indicated by reference numeral 440, BS 410 may receive data from UE 420 in the first portion of the second FFP.

[0064] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described herein. Figure 4 Examples described.

[0065] Figure 5 An example 500 of transmitting uplink data at the start of FFP in FBE mode in accordance with various aspects of the present disclosure is illustrated. Figure 5 The operations are shown from the perspective of UE 420.

[0066] As indicated by reference numeral 510, BS 410 may transmit an uplink grant message to UE 420 in the first FFP. As indicated by reference numeral 515, UE 420 may transmit uplink data in the first part of the second FFP based at least in part on the uplink grant message. UE 420 may transmit uplink data regardless of whether the LBT procedure performed by BS 410 passes or fails. If the LBT procedure passes, UE 420 may receive a COT indicator in the second FFP, and the first part of the second FFP may be a time period during the second FFP for UE 420 to process the COT indicator. If the LBT procedure fails, there may be no COT indicator. UE 420 may transmit uplink data at the beginning of the second FFP or shortly thereafter. Before UE 420 transmits uplink data, UE 420 may perform a single-shot LBT procedure, which may take only 9 μs. UE 420 may transmit uplink data based at least in part on a determination that a single-shot LBT procedure is passed.

[0067] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described herein. Figure 5 Examples described.

[0068] Figure 6An example 600 of transmitting uplink data at the start of FFP in FBE mode in accordance with various aspects of the present disclosure is illustrated. Figure 6 A timeline for a gNB (e.g., BS 410) and a UE (e.g., UE 420) is shown.

[0069] Figure 6 A gNB in ​​a first scenario (Scenario 1) is shown, where the LBT procedure of the gNB is passed. The gNB may process a COT indicator to transmit to the UE. The UE may transmit uplink data during a time for processing the COT indicator based at least in part on an uplink grant message received on the PDCCH. The gNB may transmit an uplink grant message in a last time slot of the first FFP. The uplink grant message may be part of a dynamic scheduling for the UE. Figure 6 It is shown that the UE may perform a short LBT procedure before transmitting uplink data. This may result in low latency for uplink data and may not have an impact on other UEs.

[0070] Figure 6 Also shown is the gNB in ​​a second scenario (Scenario 2) where the gNB's LBT procedure fails. Typically, there will be no COT sharing within the second FFP and the UE will not transmit uplink data. However, because the UE transmits uplink data based at least in part on an uplink grant message rather than on an LBT procedure performed by the gNB, the UE may still transmit uplink data in the first part of the second FFP even if the gNB's LBT procedure fails.

[0071] As indicated above, Figure 6 are provided as examples. Other examples may differ from those described herein. Figure 6 Examples described.

[0072] Figure 7 An example 700 of transmitting uplink data at the start of FFP in FBE mode in accordance with various aspects of the present disclosure is illustrated. Figure 7 A timeline for a gNB (e.g., BS 410) and a UE (e.g., UE 420) is shown.

[0073] Figure 7 It is shown that the gNB may not perform the LBT procedure at all before the second FFP. The gNB may indicate to the UE that the gNB will not contend for the second FFP. The UE may transmit uplink data at the beginning of the second FFP based at least in part on the indication that the gNB will not contend for the second FFP. The gNB may include the indication in a group common PDCCH (GC-PDCCH) message in the last time slot of the first FFP. Figure 7It is shown that the UE may perform a short LBT procedure before transmitting uplink data. The LBT procedure performed by the UE may be before the start of the second FFP.

[0074] As indicated above, Figure 7 are provided as examples. Other examples may differ from those described herein. Figure 7 Examples described.

[0075] Figure 8 An example 800 of transmitting uplink data at the start of FFP in FBE mode in accordance with various aspects of the present disclosure is illustrated. Figure 8 A timeline for a gNB (e.g., BS 410) and a UE (e.g., UE 420) is shown.

[0076] Figure 8 It is shown that the UE may transmit uplink data at the beginning of the second FFP based at least in part on an uplink grant message received from the gNB in ​​the first FFP. The gNB may indicate in the GC-PDCCH message that the gNB will not contend for the second FFP. Figure 8 It is shown that the UE can transmit a COT indicator to the gNB indicating that the gNB can share the COT with the UE. The gNB can transmit downlink data in the COT shared with the UE.

[0077] As indicated above, Figure 8 are provided as examples. Other examples may differ from those described herein. Figure 8 Examples described.

[0078] Fig. 9 900 is a diagram illustrating an example process 900 performed in some aspects by a UE according to various aspects of the present disclosure. Example process 900 is a diagram in which a UE (e.g., Figure 1 and 2 UE 120 as depicted in Figure 4 and 5 An example of UE 420, etc. depicted in performing operations associated with transmitting uplink data at the beginning of FFP in FBE mode.

[0079] like Fig. 9 As shown in , in some aspects, process 900 may include receiving an uplink grant message from a base station in FFP in FBE mode (block 910). In some aspects, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may receive an uplink grant message from a base station in FFP in FBE mode, as described above.

[0080] like Fig. 9As further shown in FIG. 9 , in some aspects, process 900 may include transmitting data to the base station in a first portion of the second FFP based at least in part on information in the uplink grant message (block 920). In some aspects, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may transmit data to the base station in a first portion of the second FFP based at least in part on information in the uplink grant message, as described above.

[0081] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0082] In a first aspect, a first portion of the second FFP is during a processing time for the UE to decode a COT indicator.

[0083] In a second aspect, alone or in combination with the first aspect, the first portion of the second FFP is the first one or more symbols of the second FFP.

[0084] In a third aspect, alone or in combination with one or more of the first and second aspects, transmitting data to the base station comprises transmitting data to the base station based at least in part on receiving a common downlink control message indicating that the base station will not contend for the second FFP.

[0085] In a fourth aspect, alone or in combination with one or more of the first to third aspects, receiving the uplink grant message includes: receiving the uplink grant message in a last time slot of the first FFP.

[0086] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 900 includes: receiving a COT indicator from the base station, and transmitting data to the base station based at least in part on the COT indicator.

[0087] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, transmitting data to the base station includes: executing an LBT procedure, and transmitting data to the base station based at least in part on determining that the LBT procedure is successful.

[0088] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, executing the LBT procedure includes: executing the LBT procedure in an idle period of the first FFP and before the second FFP.

[0089] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, process 900 includes generating a channel occupancy time (COT) indicator based at least in part on determining that the LBT procedure is successful, and transmitting the COT indicator to the base station.

[0090] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, process 900 includes receiving data from the base station in a second FFP based at least in part on transmitting the COT indicator to the base station.

[0091] although Fig. 9 Example blocks of process 900 are shown, but in some aspects, process 900 may include Fig. 9 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 900. Additionally or alternatively, two or more blocks of process 900 may be executed in parallel.

[0092] Fig.10 1 is a diagram illustrating an example process 1000 performed in some aspects by a base station in accordance with various aspects of the present disclosure. Example process 1000 is a diagram in which a base station (e.g., Figure 1 and 2 The BS 110 depicted Figure 4 and 5 An example of BS 410, etc. depicted in performing operations associated with transmitting uplink data at the beginning of FFP in FBE mode.

[0093] like Fig.10 As shown in FIG. 1 , in some aspects, process 1000 may include transmitting an uplink grant message to a UE in FFP in FBE mode (block 1010). In some aspects, the base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may

[0094] The uplink grant message is transmitted to the UE in FFP in FBE mode, as described above.

[0095] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include receiving data from the UE in a first portion of the second FFP based at least in part on information in the uplink grant message (block 1020). In some aspects, the base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may receive data from the UE in a first portion of the second FFP based at least in part on information in the uplink grant message, as described above.

[0096] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0097] In a first aspect, transmitting the uplink grant message includes transmitting the uplink grant message in a last time slot of a first FFP.

[0098] In a second aspect, either alone or in combination with the first aspect, process 1000 includes: performing an LBT procedure in an idle period of a first FFP and before a second FFP; and receiving data from the UE in a first part of the second FFP based at least in part on determining that the LBT procedure is successful, wherein the first part of the FFP includes processing time for decoding a COT indicator of the base station.

[0099] In a third aspect, alone or in combination with one or more of the first and second aspects, process 1000 includes: performing an LBT procedure in an idle period of a first FFP and before a second FFP; and receiving data from the UE in a first part of the second FFP based at least in part on determining that the LBT procedure is unsuccessful.

[0100] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the first portion of the second FFP is the first one or more symbols of the second FFP.

[0101] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 1000 includes: suppressing execution of the LBT procedure in an idle period at the end of the first FFP and before the second FFP; and transmitting a common downlink control message indicating that the base station will not contend for the second FFP.

[0102] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, process 1000 includes transmitting data to the UE based at least in part on receiving a COT indicator from the UE.

[0103] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, the UE is a first UE, and process 1000 further includes: receiving data from a second UE in a first part of a second FFP; and transmitting data to the second UE based at least in part on receiving a COT indicator from the second UE, wherein the first UE and the second UE share a COT with the base station.

[0104] although Fig.10 Example blocks of process 1000 are shown, but in some aspects, process 1000 may include Fig.10Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1000. Additionally or alternatively, two or more blocks of the process 1000 may be executed in parallel.

[0105] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0106] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented with hardware, firmware, and / or a combination of hardware and software.

[0107] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0108] It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit the various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes-it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0109] Although particular combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and / or disclosed in the specification. Although each of the dependent claims listed below may be directly dependent on only one claim, the disclosure of the various aspects includes each dependent claim combined with every other claim in the set of claims.

[0110] Elements, actions or instructions used herein should not be interpreted as critical or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, combinations of related items and non-related items, etc.), and can be used interchangeably with "one or more". In the case of intending to have only one item, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including", etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated.

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: receiving an uplink grant message from a base station in a first fixed frame period (FFP) in a frame based equipment (FBE) mode; as well as transmitting data to the base station in a first portion of a second FFP based at least in part on information in the uplink grant message, wherein the first portion of the second FFP is during a processing time for the UE to decode a channel occupancy time (COT) indicator, or Wherein the first part of the second FFP is the first one or more code elements of the second FFP.

2. The method of claim 1, wherein transmitting data to the base station comprises: Data is transmitted to the base station based at least in part on receiving a common downlink control message indicating that the base station will not contention for the second FFP.

3. The method of claim 1 , wherein receiving the uplink grant message comprises: The uplink grant message is received in a last time slot of the first FFP.

4. The method of claim 1, further comprising: A channel occupancy time (COT) indicator is received from the base station, and data is transmitted to the base station based at least in part on the COT indicator.

5. The method of claim 1 , wherein transmitting data to the base station comprises: A listen-before-talk (LBT) procedure is performed, and data is transmitted to the base station based at least in part on determining that the LBT procedure is successful.

6. The method of claim 5, wherein performing the LBT procedure comprises: The LBT procedure is performed during an idle period of the first FFP and before the second FFP.

7. The method of claim 5, further comprising: A channel occupancy time (COT) indicator is generated based at least in part on determining that the LBT procedure is successful, and the COT indicator is transmitted to the base station.

8. The method of claim 7, further comprising: Data is received in the second FFP from the base station based at least in part on transmitting the COT indicator to the base station.

9. A wireless communication method performed by a base station, comprising: transmitting an uplink grant message to a user equipment (UE) in a first fixed frame period (FFP) in a frame based equipment (FBE) mode; as well as receiving data from the UE in a first portion of a second FFP based at least in part on information in the uplink grant message, wherein the first portion of the second FFP is during a processing time for the UE to decode a channel occupancy time (COT) indicator, or Wherein the first part of the second FFP is the first one or more code elements of the second FFP.

10. The method of claim 9, wherein transmitting the uplink grant message comprises: The uplink grant message is transmitted in a last time slot of the first FFP.

11. The method of claim 9, further comprising: performing a listen-before-talk (LBT) procedure during an idle period of the first FFP and before the second FFP; as well as Data is received from the UE in the first portion of the second FFP based at least in part on determining that the LBT procedure is successful.

12. The method of claim 9, further comprising: performing a listen-before-talk (LBT) procedure during an idle period of the first FFP and before the second FFP; as well as Data is received from the UE in the first portion of the second FFP based at least in part on determining that the LBT procedure is unsuccessful.

13. The method of claim 9, further comprising: refraining from performing a listen-before-talk (LBT) procedure during an idle period at the end of the first FFP and before the second FFP; and transmitting a common downlink control message indicating that the base station will not contend for the second FFP.

14. The method of claim 9, further comprising: Data is transmitted to the UE based at least in part on receiving a channel occupancy time (COT) indicator from the UE.

15. The method of claim 9, wherein the UE is a first UE, and wherein the method further comprises: receiving data from a second UE in the first portion of the second FFP; as well as Data is transmitted to the second UE based at least in part on receiving a channel occupancy time (COT) indicator from the second UE, wherein the first UE and the second UE share a COT with the base station.

16. A user equipment (UE) for wireless communication, comprising: Memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receiving an uplink grant message from a base station in a first fixed frame period (FFP) in a frame based equipment (FBE) mode; as well as transmitting data to the base station in a first portion of a second FFP based at least in part on information in the uplink grant message, wherein the first portion of the second FFP is during a processing time for the UE to decode a channel occupancy time (COT) indicator, or Wherein the first part of the second FFP is the first one or more code elements of the second FFP.

17. The UE of claim 16, wherein the memory and the one or more processors are configured to transmit data to the base station based at least in part on receiving a common downlink control message indicating that the base station will not contend for the second FFP.

18. The UE of claim 16, wherein the memory and the one or more processors are configured to: receive the uplink grant message in a last time slot of the first FFP.

19. The UE of claim 16, wherein the memory and the one or more processors are configured to: receive a channel occupancy time (COT) indicator from the base station, and transmit data to the base station based at least in part on the COT indicator.

20. The UE of claim 16, wherein the memory and the one or more processors are configured to: perform a listen-before-talk (LBT) procedure, and transmit data to the base station based at least in part on determining that the LBT procedure is successful.

21. The UE of claim 20, wherein the memory and the one or more processors are configured to: execute the LBT procedure in an idle period of the first FFP and before the second FFP.

22. The UE of claim 20, wherein the memory and the one or more processors are configured to generate a channel occupancy time (COT) indicator based at least in part on determining that the LBT procedure is successful, and transmit the COT indicator to the base station.

23. The UE of claim 22, wherein the memory and the one or more processors are configured to receive data from the base station in the second FFP based at least in part on transmitting the COT indicator to the base station.

24. A base station for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: transmitting an uplink grant message to a user equipment (UE) in a first fixed frame period (FFP) in a frame based equipment (FBE) mode; as well as receiving data from the UE in a first portion of a second FFP based at least in part on information in the uplink grant message, wherein the first portion of the second FFP is during a processing time for the UE to decode a channel occupancy time (COT) indicator, or Wherein the first part of the second FFP is the first one or more code elements of the second FFP.

25. The base station of claim 24, wherein the memory and the one or more processors are configured to transmit the uplink grant message in a last time slot of the first FFP.

26. The base station of claim 24, wherein the memory and the one or more processors are configured to: performing a listen-before-talk (LBT) procedure during an idle period of the first FFP and before the second FFP; and Data is received from the UE in the first portion of the second FFP based at least in part on determining that the LBT procedure is successful.

27. The base station of claim 24, wherein the memory and the one or more processors are configured to: performing a listen-before-talk (LBT) procedure during an idle period of the first FFP and before the second FFP; and Data is received from the UE in the first portion of the second FFP based at least in part on determining that the LBT procedure is unsuccessful.

28. A base station as claimed in claim 24, wherein the memory and the one or more processors are configured to: suppress execution of a listen-before-talk (LBT) procedure in an idle period at the end of the first FFP and before the second FFP; and transmit a common downlink control message indicating that the base station will not contend for the second FFP.

29. The base station of claim 24, wherein the memory and the one or more processors are configured to transmit data to the UE based at least in part on receiving a channel occupancy time (COT) indicator from the UE.

30. The base station of claim 24, wherein the UE is a first UE, and wherein the memory and the one or more processors are configured to: receiving data from a second UE in the first portion of the second FFP; and Data is transmitted to the second UE based at least in part on receiving a channel occupancy time (COT) indicator from the second UE, wherein the first UE and the second UE share a COT with the base station.

31. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to: receiving an uplink grant message from a base station in a first fixed frame period (FFP) in a frame based equipment (FBE) mode; and transmitting data to the base station in a first portion of a second FFP based at least in part on information in the uplink grant message, wherein the first portion of the second FFP is during a processing time for the UE to decode a channel occupancy time (COT) indicator, or Wherein the first part of the second FFP is the first one or more code elements of the second FFP.

32. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that when executed by one or more processors of a base station cause the one or more processors to: transmitting an uplink grant message to a user equipment (UE) in a first fixed frame period (FFP) in a frame based equipment (FBE) mode; as well as receiving data from the UE in a first portion of a second FFP based at least in part on information in the uplink grant message, wherein the first portion of the second FFP is during a processing time for the UE to decode a channel occupancy time (COT) indicator, or Wherein the first part of the second FFP is the first one or more code elements of the second FFP.

33. A device for wireless communication, comprising: means for receiving an uplink grant message from a base station in a first fixed frame period (FFP) in a frame based equipment (FBE) mode; as well as means for transmitting data to the base station in a first portion of a second FFP based at least in part on information in the uplink grant message, wherein the first portion of the second FFP is during a processing time for the device to decode a channel occupancy time (COT) indicator, or Wherein the first part of the second FFP is the first one or more code elements of the second FFP.

34. A device for wireless communication, comprising: means for transmitting an uplink grant message to a user equipment (UE) in a first fixed frame period (FFP) in a frame based equipment (FBE) mode; as well as means for receiving data from the UE in a first portion of a second FFP based at least in part on information in the uplink grant message, wherein the first portion of the second FFP is during a processing time for the UE to decode a channel occupancy time (COT) indicator, or Wherein the first part of the second FFP is the first one or more code elements of the second FFP.

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