Listen-Before-Talk (LBT) fault detection in dormant cells and external discontinuous reception (DRX) active time

Abstract

A wireless communication system and method related to communication in a network are provided. A UE receives a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of the wireless communication network. The UE performs LBT fault detection in the first cell when operating in the sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle based on the LBT fault detection configuration. The UE sends an LBT fault detection report based on the LBT fault detection.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of U.S. Patent Application No. 16 / 948,278, filed on September 10, 2020, and U.S. Provisional Patent Application No. 63 / 025,447, filed on May 15, 2020, the disclosures of which are incorporated herein by reference in their entireties as if fully set forth below and for all applicable purposes. Technical Field

[0003] The present application relates to wireless communication systems, and more particularly, to listen-before-talk (LBT) failure detection and channel occupancy detection in sleep mode and external discontinuous reception (DRX) active time. Background Art

[0004] To meet the growing demand for extended mobile broadband connections, wireless communication technology is advancing from LTE technology to the next generation New Radio (NR) technology. For example, NR is designed to provide lower latency, higher bandwidth or throughput, and higher reliability than LTE. NR is designed to operate on a wide array of spectrum bands, for example, from low frequency bands below about 1 gigahertz (GHz) and mid-frequency bands from about 1 GHz to about 6 GHz, to high frequency bands such as millimeter wave (mmWave) bands. NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed and shared spectrum. Spectrum sharing enables operators to have the opportunity to aggregate spectrum to dynamically support high-bandwidth services. Spectrum sharing can extend the benefits of NR operating entities that may not have access to licensed spectrum.

[0005] NR-Unlicensed (NR-U) may refer to the deployment of NR cells in unlicensed spectrum. For example, NR cells may be deployed in standalone NR-U mode on one or more unlicensed bands. NR-U may also support cell deployment using various combinations of unlicensed bands and licensed bands. For example, carrier aggregation may be used to deploy NR cells to combine NR licensed bands with NR unlicensed bands, where the licensed bands may be used as anchor carriers or primary cells (Pcells), and the unlicensed bands may be used as supplementary carriers or secondary cells (Scells). Scells may include uplink (UL) component carriers and downlink (DL) component carriers. Alternatively, Scells may include only DL component carriers. In another example, NR cells may be deployed using dual connectivity between LTE licensed bands and NR unlicensed bands, where LTE licensed bands may be used as Pcells, and NR unlicensed bands may be used as Scells. In yet another example, NR cells may be deployed in DL unlicensed bands and UL licensed bands. Summary of the invention

[0006] The following summarizes some aspects of the present disclosure to provide a basic understanding of the technology discussed. This summary is not an extensive review of all expected features of the present disclosure, and is neither intended to identify key or important elements of all aspects of the present disclosure, nor is it intended to describe the scope of any or all aspects of the present disclosure. Its sole purpose is to present some concepts of one or more aspects of the present disclosure in an overview form as a preface to a more detailed description presented later.

[0007] For example, in one aspect of the present disclosure, a method of wireless communication includes receiving, by a user equipment (UE), a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The method also includes, based on the LBT fault detection configuration, performing LBT fault detection in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle. The method also includes sending an LBT fault detection report based on the LBT fault detection.

[0008] In an additional aspect of the present disclosure, a UE includes a transceiver configured to receive a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The UE also includes a processor configured to perform LBT fault detection in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle based on the LBT fault detection configuration. The transceiver is also configured to send an LBT fault detection report based on the LBT fault detection.

[0009] In an additional aspect of the present disclosure, a non-transitory computer-readable medium includes program code recorded thereon, the program code including code for causing a UE to receive a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The non-transitory computer-readable medium also includes code for causing the UE to perform LBT fault detection in the first cell based on the LBT fault detection configuration when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle. The non-transitory computer-readable medium also includes code for causing the UE to send an LBT fault detection report based on the LBT fault detection.

[0010] In an additional aspect of the present disclosure, a UE includes a component for receiving a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The UE also includes a component for performing LBT fault detection in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle based on the LBT fault detection configuration. The UE also includes a component for sending an LBT fault detection report based on the LBT fault detection.

[0011] In one aspect of the present disclosure, a method of wireless communication includes sending, by a base station (BS), to a user equipment (UE) a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The method also includes receiving an LBT fault detection report from the UE based on the LBT fault detection configuration, the fault detection report indicating LBT fault detection performed by the UE in the first cell when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle.

[0012] In an additional aspect of the present disclosure, a BS includes a transceiver configured to send a listen-before-talk (LBT) failure detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network to a user equipment (UE). The transceiver is also configured to receive an LBT failure detection report from the UE based on the LBT failure detection configuration, the failure detection report indicating an LBT failure detection performed by the UE in the first cell when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle.

[0013] In an additional aspect of the present disclosure, a non-transitory computer-readable medium includes program code recorded thereon, the program code including code for causing a base station (BS) to send a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network to a user equipment (UE). The computer-readable medium also includes code for causing the BS to receive an LBT fault detection report from the UE based on the LBT fault detection configuration, the fault detection report indicating that the UE performs LBT fault detection in the first cell when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle.

[0014] In an additional aspect of the present disclosure, a BS includes a component for sending a listen-before-talk (LBT) failure detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network to a user equipment (UE). The BS also includes a component for receiving an LBT failure detection report from the UE based on the LBT failure detection configuration, the failure detection report indicating an LBT failure detection performed by the UE in the first cell when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle.

[0015] By reading the following description of the specific exemplary aspects of the present disclosure in conjunction with the accompanying drawings, other aspects, features and characteristics of the present disclosure will become apparent to those of ordinary skill in the art. Although the features of the present disclosure can be discussed with respect to certain aspects and the accompanying drawings below, all aspects of the present disclosure can include one or more advantageous features discussed herein. In other words, although one or more aspects can be discussed as having certain advantageous features, one or more such features can also be used according to the various aspects of the present disclosure discussed herein. In a similar manner, although the exemplary aspects can be discussed below as equipment, systems or methods, it should be understood that these exemplary aspects can be implemented in various devices, systems and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A wireless communication network in accordance with one or more aspects of the present disclosure is shown.

[0017] Figure 2 A wireless communication network supporting wireless communication over multiple cells in accordance with one or more aspects of the present disclosure is shown.

[0018] Figure 3 A channel measurement scheme for a dormant cell according to one or more aspects of the present disclosure is shown.

[0019] Figure 4 An uplink (UL) listen-before-talk (LBT) failure detection and reporting scheme for dormant cells according to one or more aspects of the present disclosure is shown.

[0020] Figure 5 A downlink (DL) LBT failure detection and reporting scheme for dormant cells according to one or more aspects of the present disclosure is shown.

[0021] Figure 6 A received signal strength indicator (RSSI) / channel occupancy (CO) measurement and reporting scheme for a dormant cell according to one or more aspects of the present disclosure is shown.

[0022] Figure 7An RSSI / CO measurement and reporting scheme for dormant cells according to one or more aspects of the present disclosure is shown.

[0023] Figure 8 An LBT failure detection and RSSI / CO measurement scheme for an on-duration configured for inactive discontinuous reception (DRX) according to one or more aspects of the present disclosure is shown.

[0024] Fig. 9 An LBT failure detection and RSSI / CO measurement scheme for a dormant cell according to one or more aspects of the present disclosure is shown.

[0025] Fig.10 An LBT failure detection and RSSI / CO measurement scheme for a duration configured as inactive DRX is shown in accordance with one or more aspects of the present disclosure.

[0026] Fig.11 is a block diagram of an exemplary base station (BS) according to one or more aspects of the present disclosure.

[0027] Fig.12 is a block diagram of an exemplary user equipment (UE) according to one or more aspects of the present disclosure.

[0028] Fig.13 is a flow chart of a wireless communication method according to one or more aspects of the present disclosure.

[0029] Fig.14 is a flow chart of a wireless communication method according to one or more aspects of the present disclosure. DETAILED DESCRIPTION

[0030] The detailed description set forth below, in conjunction with the accompanying drawings, is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, in order to avoid confusion with these concepts, well-known structures and components are shown in block diagram form.

[0031] In various aspects, these techniques and devices can be used in wireless communication networks, such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, fifth generation (5G) or new radio (NR) networks, and other communication networks. As described herein, the terms "network" and "system" can be used interchangeably.

[0032] A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network may implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network may implement radio technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). The "3rd Generation Partnership Project" (3GPP) Long Term Evolution (LTE) and Advanced LTE (LTE-A) are new versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the "3rd Generation Partnership Project." CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used for the above wireless networks and radio technologies as well as other wireless networks and radio technologies, such as next generation (e.g., fifth generation (5G)) networks. The 3rd Generation Partnership Project (3GPP) is a collaboration between a group of telecommunications associations to define globally applicable third generation (3G) mobile phone specifications. 3GPP Long Term Evolution (LTE) is a 3GPP project to improve the Universal Mobile Telecommunications System (UMTS) mobile phone standard. 3GPP can define specifications for next generation mobile networks, mobile systems, and mobile devices. The present disclosure relates to the evolution of wireless technologies from LTE, 4G, 5G, NR, and sharing access to wireless spectrum between networks using a set of new and different radio access technologies or radio air interfaces.

[0033] Specifically, 5G networks consider different deployments, different spectrums, and different services and devices that can be implemented using a unified air interface based on OFDM. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are also considered. 5G NR will be able to scale to provide (1) coverage for massive Internet of Things (IoT) with ultra-high density (e.g., ~1M nodes / km2), ultra-low complexity (e.g., ~tens of bits / second), ultra-low energy (e.g., ~10+ years of battery life), and deep coverage with the ability to reach challenging locations; (2) mission-critical control including strong security to protect sensitive personal, financial, or classified information, ultra-high reliability (e.g., ~99.9999% reliability), ultra-low latency (e.g., ~1ms), and users with a wide range of mobility or lack of mobility; and (3) enhanced mobile broadband including extremely high capacity (e.g., ~10Tbps / km2), extremely high data rates (e.g., multi-Gbps rates, 100+Mbps user experience rates), and deep awareness with advanced discovery and optimization.

[0034] 5G NR can be implemented using an optimized OFDM-based waveform with scalable parameter sets and transmission time intervals (TTIs); with a common, flexible framework to efficiently multiplex services and features using dynamic, low-latency time division duplex (TDD) / frequency division duplex (FDD) designs; and advanced wireless technologies such as massive multiple-input multiple-output (MIMO), powerful millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility. The scalability of parameter sets in 5G NR, as well as the extension of subcarrier spacing, can effectively solve the problem of operating different services on different spectrums and different deployments. For example, in various outdoor and macro coverage deployments of less than 3GHz FDD / TDD implementations, the subcarrier spacing may appear as 15kHz, such as over 1, 5, 10, 20MHz, etc. BW. For various other outdoor and small cell coverage deployments with TDD greater than 3GHz, the subcarrier spacing on 80 / 100MHz BW may appear as 30kHz. For various other indoor broadband implementations, using TDD on the unlicensed portion of the 5GHz band, the subcarrier spacing may appear as 60kHz over 160MHz BW. Finally, for various deployments sending the mmWave component with 28GHz TDD, the subcarrier spacing may appear as 120kHz over 500MHz bandwidth.

[0035] 5G NR's scalable parameter sets facilitate scalable TTIs for different latency and quality of service (QoS) requirements. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmissions to start on symbol boundaries. 5G NR also considers independent integrated subframe designs with uplink (UL) / downlink (DL) scheduling information, data, and acknowledgments in the same subframe. Independent integrated subframes support communications in unlicensed or contention-based shared spectrum, adaptive UL / DL, which can be flexibly configured on a per-cell basis to dynamically switch between UL and DL to meet current business needs.

[0036] Various other aspects and features of the present disclosure are further described below. It should be clear that the teachings here can be implemented in various forms, and any specific structure, function or both disclosed here are merely representative and non-restrictive. Based on the teachings here, it should be understood by those of ordinary skill in the art that an aspect disclosed here can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement a device or practice a method. In addition, in addition to or in place of one or more aspects set forth herein, other structures, functions or structures and functions can be used to implement such a device or practice such a method. For example, a method can be implemented as a part of a system, device, device, and / or implemented as an instruction stored on a computer-readable medium for execution on a processor or computer. In addition, an aspect can include at least one element of a claim.

[0037] In order to transmit data at a higher rate, the UE and the BS can communicate in parallel (a form of carrier aggregation) on multiple frequency bands. In this configuration, one frequency band can be associated with a primary cell (Pcell) and another frequency band can be associated with a secondary cell (Scell). When the full bandwidth is not needed, the UE can be configured to enter a low power mode. For example, the BS can configure the UE to operate in a sleep mode in the Scell. When operating in sleep mode in the SCell, the UE can be configured to perform channel state information (CSI) measurements, beam measurements and / or automatic gain control (AGC) in the SCell, but not perform physical downlink control channel (PDCCH) monitoring. In other words, the UE is not expected to send UL data to the BS and / or receive DL data from the BS in the SCell, but the connection with the BS or the network is maintained so that when data needs to be transmitted, the SCell can be quickly reactivated without having to perform another connection establishment.

[0038] In another example, a discontinuous reception (DRX) mode can be used to allow a UE to operate in a low power mode. In order to operate in the DRX mode, the BS can configure the UE with a DRX cycle, which can include an on-duration and an off-duration. During the configuration on-duration, the UE can monitor the PDCCH from the BS. During the configured off-duration, the UE can enter a low power mode or a sleep mode, where the UE is not expected to receive the PDCCH from the BS. In order to provide further power savings, the BS can configure the UE with a wake-up signal (WUS) monitoring opportunity, where each WUS monitoring opportunity can be followed by a configuration on-duration. The UE can listen to the WUS in the WUS monitoring opportunity. If a WUS is received during the WUS opportunity, the UE can be activated to configure the on-duration. For example, the UE can perform PDCCH monitoring during the configuration on-duration, and can be scheduled by the BS for UL and / or DL ​​transmission during the configuration on-duration. If the UE fails to detect a WUS in a certain WUS monitoring opportunity, the UE may continue to remain in an inactive mode (e.g., sleep mode) during the next configured on-duration. In this way, the BS may determine whether to send a WUS to the UE based on the traffic load without causing the UE to operate in active mode for each configured on-duration, thereby allowing the UE to further save power. A DRX configured on-duration without a preceding WUS may be referred to as an inactive DRX configured on-duration.

[0039] Although the sleep mode and DRX mode allow the UE to save power by partially shutting down at least some components at the UE (e.g., radio front end (RF) components), there is a delay associated with reactivation. In order to balance power saving and low activation delay, the UE can perform some operations to maintain the connection while in low power mode. For example, in a UE where the Scell ​​is dormant, if configured to perform CSI measurements, AGC, and beam management, the UE can perform these operations. CSI, AGC, and / or beam measurements consume power at the UE. Therefore, there is a trade-off between activation delay and power consumption. In some aspects, the Scell ​​operates on an unlicensed band that can be shared by other wireless nodes. Channel access is based on contention, such as using an LBT mechanism. Therefore, when the Scell ​​is activated, there is no guarantee that the channel is available. CSI and / or beam measurements do not provide any information associated with channel occupancy. Therefore, although CSI and / or beam measurements can indicate good signal quality (e.g., a high signal-to-noise ratio (SNR) in the SCell), the channel may be congested. Similarly, with the WUS mechanism in DRX mode, the UE may be in sleep mode for a long time and the BS may not have any channel occupancy information for the cell in which the UE operates in DRX mode. Therefore, it may be desirable for the UE to report information related to LBT and / or channel occupancy measurements when operating in sleep mode or DRX mode with an inactive configuration on duration.

[0040] The present application describes a mechanism for performing channel occupancy measurements when a UE operates in a sleep mode or a DRX mode with an inactive configuration on duration. In some aspects, the BS may configure the UE to perform UL LBT measurements when operating in a sleep SCell. One way to trigger UL LBT measurements without sending data is by scheduling a "virtual" UL allocation or transmission. The BS may also configure the UE to report UL LB fault detection, for example, via a non-sleeping cell (where the UE can perform active UL and / or DL ​​communications with the BS). In other aspects, the BS may also configure the UE to perform DL LBT measurements in a sleep SCell. These can be performed by the UE listening to some pre-configured DL signals (e.g., synchronization signal blocks (SSBs)). The BS may also configure the UE to report DL LBT fault detection, for example, via a non-sleeping cell. In other aspects, the BS may also configure the UE to perform RSSI / CO measurements periodically or aperiodically in response to a trigger. The BS may also configure the UE to report RSSI / CO measurements, for example, via a non-sleeping cell. In another aspect, the BS may also configure a UE operating in DRX mode to perform channel occupancy measurements (such as UL LBT failure detection, DL LBT failure detection, and / or RSSI / CO measurements) during the inactive configuration on duration, and report these measurements. These aspects may be used independently or in any combination. In addition, they may be configured independently, or a single configuration may enable multiple measurement types.

[0041] Aspects of the present disclosure may provide several benefits. For example, configuring a UE to perform and report channel occupancy-related detections and / or measurements (e.g., UL LBT failure detection, DL LBT failure detection, and / or RSSI / CO measurements) in a cell (on an unlicensed band) while the UE is operating in a sleep mode of the cell or in a DRX mode in the cell with an on-duration configured for frequent inactivity, may allow the BS to better understand the channel occupancy and / or UL interference of the UE in the cell, which the BS may otherwise be unaware of. In this way, the BS is able to determine whether to reactivate the UE in the sleep cell and the likelihood of obtaining channel access when the BS has traffic for the UE. In addition, the BS may balance power efficiency or savings at the UE and activation delay (from sleep mode to non-sleep mode) by configuring LBT failure detection and / or channel occupancy measurement opportunities.

[0042] Figure 1A wireless communication network 100 is shown according to some aspects of the present disclosure. The network 100 may be a 5G network. The network 100 includes a number of base stations (BSs) 105 and other network entities. The BSs 105 may be stations that communicate with the UEs 115 and may also be referred to as evolved Node Bs (eNBs), next generation eNBs (gNBs), access points, etc. Each BS 105 may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to that particular geographic coverage area of ​​the BS 105 and / or a BS subsystem serving that coverage area, depending on the context in which the term is used.

[0043] BS 105 may provide communication coverage for macro cells or small cells (such as pico cells or femto cells) and / or other types of cells. Macro cells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to UEs that have subscribed to services from a network provider. Small cells such as pico cells typically cover a relatively small geographic area and may allow unrestricted access to UEs that have subscribed to services from a network provider. Small cells such as femto cells also typically cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access to UEs associated with the femto cells (e.g., UEs in a closed subscriber group (CSG), UEs of users in a home, etc.). The BS for a macro cell may be referred to as a macro BS. The BS for a small cell may be referred to as a small cell BS, a pico BS, a femto BS, or a home BS. In Figure 1 In the example shown, BS 105d and 105e may be conventional macro BSs, while BS 105a-105c may be macro BSs that enable one of three-dimensional (3D), full-dimensional (FD), or massive multiple-input multiple-output (MIMO). BS 105a-105c may utilize their higher-dimensional MIMO capabilities to utilize 3D beamforming in elevation and azimuth beamforming to increase coverage and capacity. BS 105f may be a small cell BS, which may be a home node or a portable access point. BS 105 may support one or more (e.g., two, three, four, etc.) cells.

[0044] The network 100 may support synchronous or asynchronous operation. For synchronous operation, the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time. For asynchronous operation, the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.

[0045] UE 115 is dispersed throughout the wireless network 100, and each UE 115 may be fixed or mobile. UE 115 may also be referred to as a terminal, a mobile station, a subscriber unit, a station, etc. UE 115 may be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, etc. In one aspect, UE 115 may be a device including a universal integrated circuit card (UICC). In another aspect, UE may be a device that does not include a UICC. In some aspects, UE 115 that does not include a UICC may also be referred to as an Internet of Everything (IoE) device. UE 115a-115d is an example of a mobile smart phone type device that accesses the network 100. UE 115 may also be a machine specifically configured for connecting communications, including machine type communications (MTC), enhanced MTC (eMTC), narrowband Internet of Things (NB-IoT), etc. UE 115e-115k is an example of various machines configured for communications of accessing the network 100. UE 115 is able to communicate with any type of BS, whether macro BS, small cell, etc. Figure 1 , lightning (e.g., communication link) indicates wireless transmission between UE 115 and serving BS 105, which is a BS designated to serve UE 115 on downlink (DL) and / or uplink (UL), or desired transmission between BSs, and backhaul transmission between BSs.

[0046] In operation, BS 105a-105c can use 3D beamforming and cooperative spatial techniques (such as coordinated multi-point (CoMP) or multi-connectivity) to serve UE 115a and 115b. Macro BS 105d can perform backhaul communications with BS 105a-105c and small cell BS 105f. Macro BS 105d can also send multicast services subscribed and received by UE 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information, such as weather emergencies or alerts (such as Amber Alerts or Gray Alerts).

[0047] The network 100 may also support mission-critical communications with ultra-reliable and redundant links for mission-critical devices, such as UE 115e, which may be a drone. The redundant communication links with UE 115e may include links from macro BSs 105d and 105e, and links from small cell BSs 105f. Other machine-type devices such as UE 115f (e.g., a thermometer), UE 115g (e.g., a smart meter), and UE 115h (e.g., a wearable device) may communicate directly with BSs such as small cell BSs 105f and macro BSs 105e through the network 100, or in a multi-hop configuration by communicating with another user equipment that relays its information to the network, such as UE 115f communicating temperature measurement information to a smart meter, UE 115g, which is then reported to the network through the small cell BS 105f. The network 100 may also provide additional network efficiency through dynamic, low-latency TDD / frequency division duplex (FDD) communications, such as in vehicle-to-vehicle (V2V) communications.

[0048] In some implementations, the network 100 communicates using an OFDM-based waveform. An OFDM-based system can divide the system BW into multiple (K) orthogonal subcarriers, which are also commonly referred to as subcarriers, frequency modulations, bins, etc. Each subcarrier can be modulated with data. In some cases, the subcarrier spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system BW. The system BW can also be divided into subbands. In other cases, the subcarrier spacing and / or the duration of the transmission time interval (TTI) can be scalable.

[0049] In one aspect, BS 105 may assign or schedule transmission resources (e.g., in the form of time-frequency resource blocks (RBs)) for DL ​​and UL transmissions in network 100. DL refers to the transmission direction from BS 105 to UE 115, while UL refers to the transmission direction from UE 115 to BS 105. The communication may be in the form of a radio frame. A radio frame may be divided into a plurality of subframes, e.g., about 10. Each subframe may be divided into time slots, e.g., about 2. Each time slot may be further divided into micro-slots. In FDD mode, simultaneous UL and DL transmissions may occur in different frequency bands. For example, each subframe includes a UL subframe in a UL frequency band and a DL subframe in a DL frequency band. In time division duplex (TDD) mode, UL and DL transmissions occur in different time periods using the same frequency band. For example, a subset of subframes in a radio frame (e.g., DL subframes) may be used for DL ​​transmissions, while another subset of subframes in a radio frame (e.g., UL subframes) may be used for UL transmissions.

[0050] DL subframes and UL subframes may be further divided into several regions. For example, each DL or UL subframe may have a predefined region for transmitting reference signals, control information, and data. A reference signal is a predetermined signal that facilitates communication between BS 105 and UE 115. For example, a reference signal may have a specific pilot pattern or structure, wherein the pilot frequency modulation may span an operating bandwidth or frequency band, each at a predefined time and a predefined frequency. For example, BS 105 may send a cell-specific reference signal (CRS) and / or a channel state information-reference signal (CSI-RS) to enable UE 115 to estimate a DL channel. Similarly, UE 115 may send a sounding reference signal (SRS) to enable BS 105 to estimate an UL channel. Control information may include resource assignments and protocol control. Data may include protocol data and / or operational data. In some aspects, BS 105 and UE 115 may communicate using independent subframes. An independent subframe may include a portion for DL ​​communication and a portion for UL communication. An independent subframe may be DL-centric or UL-centric. A DL-centric subframe may include a longer duration for DL ​​communication than UL communication. A UL-centric subframe may include a longer duration for UL communication than DL communication.

[0051] In one aspect, network 100 may be an NR network deployed on a licensed spectrum and / or an unlicensed spectrum. BS 105 may send synchronization signals (e.g., including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)) in network 100 to facilitate synchronization. BS 105 may broadcast system information associated with network 100 (e.g., including a master information block (MIB), remaining minimum system information (RMSI), and other system information (OSI)) to facilitate initial network access. In some instances, BS 105 may broadcast PSS, SSS, and / or MIB in the form of synchronization signal blocks (SSBs) over a physical broadcast channel (PBCH), and may broadcast RMSI and / or OSI over a physical downlink shared channel (PDSCH).

[0052] On the one hand, UE 115 attempting to access network 100 can perform an initial cell search by detecting the PSS from BS 105. PSS can enable synchronization of period timing and can indicate a physical layer identity value. Then, UE 115 can receive SSS. SSS can enable radio frame synchronization and can provide a cell identity value, which can be combined with the physical layer identity value to identify the cell. SSS can also enable detection of duplex mode and periodic prefix length. Some systems such as TDD systems can send SSS instead of PSS. PSS and SSS can be located in the center part of the carrier, respectively. After receiving PSS and SSS, UE 115 can receive MIB. MIB can include system information for initial network access and scheduling information for RMSI and / or OSI. After decoding MIB, UE 115 can receive RMSI and / or OSI. RMSI and / or OSI may include radio resource control (RRC) information related to random access channel (RACH) procedures, paging, control resource set (CORESET) for physical downlink control channel (PDCCH) monitoring, physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), power control, SRS, and cell barring.

[0053] After obtaining the MIB, RMSI and / or OSI, the UE 115 may perform a random access procedure to establish a connection with the BS 105. After the connection is established, the UE 115 and the BS 105 may enter a normal operation period, in which operational data may be exchanged. For example, the BS 105 may schedule the UE 115 for UL and / or DL ​​communications. The BS 105 may send an UL and / or DL ​​scheduling grant to the UE 115 via the PDCCH. The BS 105 may send a DL communication signal to the UE 115 via the PDSCH according to the DL scheduling grant. The UE 115 may send an UL communication signal to the BS 105 via the PUSCH and / or PUCCH according to the UL scheduling grant.

[0054] In one aspect, the network 100 can operate on a shared or unlicensed frequency band, for example, about 3.5 gigahertz (GHz), sub-6 GHz, or higher frequencies in the millimeter wave band. Operations in the unlicensed spectrum can include DL transmissions and / or UL transmissions. The network 100 can divide the frequency band into multiple channels or sub-bands, for example, each occupying about 20 megahertz (MHz).

[0055] BS 105 and UE 115 may be operated by multiple network operation entities that share resources in a shared or unlicensed spectrum, and may perform an LBT process (e.g., clear channel assessment (CCA)) before communication to determine whether a channel is available. In an example, BS 105 may employ an LBT process to reserve a transmission opportunity (TXOP) for communication in a shared medium. TXOP may be discontinuous in time and may refer to the amount of time a station can send a frame when it wins competition for a wireless medium. Each TXOP may include multiple time slots and one or more medium sensing periods. BS 105 may perform LBT in a frequency band before sending in the frequency band, and may send in one or more channels based on the LBT result. If the channel is available (the result of the execution of LBT is LBT success), BS 105 may perform DL transmission, receive UL transmission from UE 115, and / or schedule UE 115 to send and / or receive data within the TXOP. If the channel is unavailable (the result of the execution of LBT is LBT failure), BS 105 may compensate and perform the LBT process again at a later point in time.

[0056] LBT can be based on energy detection (ED) or signal detection. For LBT based on energy detection, when the signal energy measured from the channel is lower than a threshold, the LBT result is a success. On the contrary, when the signal energy measured from the channel exceeds a threshold, the LBT result is a failure. For LBT based on signal detection, when a channel reservation signal (e.g., a predetermined pilot signal) is not detected in the channel, the LBT result is a success. In addition, LBT can be in multiple modes. The LBT mode can be, for example, Category 4 (CAT4) LBT, Category 2 (CAT2) LBT, or Category 1 (CAT1) LBT. CAT1 LBT is referred to as a no-LBT mode, in which LBT is not performed before transmission. CAT2 LBT refers to LBT without a random backoff period. For example, a transmitting node can determine a channel measurement in a time interval and determine whether the channel is available based on a comparison of the channel measurement with an ED threshold. CAT4 LBT refers to LBT with random backoff and a variable contention window (CW). For example, a transmitting node can extract a random number and back off for a duration based on the extracted random number within a certain time unit.

[0057] In some aspects, for example, for power conservation, the BS 105 may configure the UE 115 to operate in a dormant bandwidth part (BWP). It is not expected that the UE 115 performs PDCCH monitoring in the dormant BWP, and therefore the BS 105 may not configure a CORESET for the UE 115 in the dormant BWP. In some aspects, for example, when the dormant BWP is in an unlicensed band, channel occupancy measurements are performed on a channel associated with the dormant BWP. According to some aspects, performing these measurements may reduce latency when the BWP is no longer dormant.

[0058] In some aspects, the UE 115 may operate in a discontinuous reception (DRX) mode. As described above, when in DRX mode, the UE 115 may periodically monitor a WUS from the BS 105. If a WUS is received, data may be transmitted between the UE 115 and the BS 105 during a subsequent on-duration. Otherwise, the UE 115 "sleeps" and does not communicate with the BS 105, e.g., does not monitor the PDCCH.

[0059] Figure 2 A wireless communication network 200 is shown that supports two cells / frequency bands over which communications between a UE 215 and a BS 205 may be performed. The network 200 may correspond to a portion of the network 100 discussed above. The BS 205 and the UE 215 may correspond to the BS 105 and the UE 115, respectively. According to some aspects, a primary cell (Pcell) 232 may be a licensed frequency band, while a secondary cell (Scell) 234 may be an unlicensed frequency band. In some aspects, the Pcell 232 may support downlink 220 and uplink 222 communications between the UE 215 and the BS 205. In some aspects, the Scell ​​234 may support downlink 224 and uplink 226 communications between the UE 215 and the BS 205. For purposes of simplifying the discussion, Figure 2 BS 205 and UE 215 are shown, but it should be appreciated that aspects of the present disclosure may be extended to more UEs 215 and / or BS 205. BS 205 and UE 215 may be similar to BS 105 and UE 115, respectively. In addition, wireless communication network 200 may operate in an unlicensed spectrum that may also be used by other wireless communication devices.

[0060] In some cases, both DL and UL communications can be on the same unlicensed band (TDD). For FDD systems, DL and UL can be on separate bands. BS 205 does not need to contend for medium access to the licensed band (in Pcell 232), and BS 105 can utilize it for transmission in addition to the available unlicensed band (in Scell ​​234).

[0061] The UE can benefit from power saving by operating the Scell ​​234 in dormancy. When data does need to be sent, the frequency band is available, but the frequency band remains in one of these modes while waiting for data to be communicated via uplink or downlink. When the Scell ​​234 is not being utilized, the Pcell 232 can be used to send data. In some cases, the BS 205 can also configure the UE 215 to operate in DRX mode in the Pcell 232 and / or Scell ​​for power saving. Through this mechanism, power saving can be achieved while still maintaining the necessary bandwidth for when more data needs to be sent.

[0062] BS 205 can utilize the unlicensed band to benefit operations in the unlicensed UL and / or DL. For example, when operating in a licensed band (Pcell 232), the BS can schedule data transmission and / or reception on a more consistent basis because BS 205 does not have to compete for the licensed medium. In other words, BS 205 is guaranteed to have access to the licensed band (Pcell 232). Depending on whether the BS wishes to include additional data in the unlicensed band of Scell ​​234 (e.g., scheduling UE 215 for data transmission at a higher BW), BS 205 can utilize the unlicensed band of Scell ​​234 on an ad hoc basis. In some aspects, when BS 205 configures UE 215 to operate in sleep mode in Scell ​​234, BS 205 can configure UE 215 to perform LBT failure detection and / or channel occupancy measurements in the unlicensed band in SCell 234, and report the LBT failure detection and / or channel occupancy measurements in Pcell 232. Although Figure 2 The Pcell 232 is shown operating on a licensed band, but it is understood that in other examples, the Pcell 232 may operate on an unlicensed band.

[0063] Figure 3-7 Various mechanisms for monitoring channel occupancy associated with a dormant BWP are shown. The x-axis represents time in arbitrary units. The y-axis represents frequency in arbitrary units. Schemes 300, 400, 500, 600, and 700 may be used by BSs such as 105 and 205 and UEs such as 115 and 215 in a network such as network 100. To avoid delays when data is ready to be sent over a dormant BWP, certain measurements may be performed in the dormant state.

[0064] Figure 3A measurement scheme 300 is shown in accordance with one or more aspects of the present disclosure. Scheme 300 includes a Pcell 302 and a Scell ​​304. Pcell 302 may be substantially similar to Pcell 232, and Scell ​​304 may be substantially similar to Scell ​​234. For example, Pcell 302 may operate on a licensed band, and Scell ​​304 may operate on an unlicensed band. The licensed band and the unlicensed band may be any suitable frequency, such as sub-6 GHz and / or millimeter wave bands. Figure 3 In the example shown, the Pcell 302 is active, where the BS 205 and the UE 215 can perform operations including UL and DL transmissions 306. The Scell ​​304 can initially be active, where the BS 205 and the UE 215 can perform UL / DL transmissions 308. After a period of time, at time T2, the Scell ​​304 becomes dormant. For example, the BS 205 can configure the UE 215 to operate in a dormant mode in the Scell ​​304, for example, to save power when the traffic for the UE 215 is light. During the dormant period 314, the Scell ​​304 is not used for communication between the UE 215 and the BS 205. However, channel measurements 310 can be performed so that the channel can continue to be characterized when the Scell ​​304 is no longer dormant. The channel measurements can include CSI measurements, AGC, and beam management (e.g., for beam failure detection (BFD) and / or beam failure recovery (BFR)). By performing channel measurements during the sleep state, the UE can achieve power savings by remaining sleepy, but keep activation delays low. When the Scell ​​304 leaves the sleep period 314 and transitions to a non-sleep or active mode, there is a delay 316 before UL and DL transmissions 312 can resume. The delay 316 may be caused by many factors, including re-characterizing the channel and determining channel occupancy before transmitting in the Scell ​​304.

[0065] Figure 4A UL LBT failure detection and reporting scheme 400 for a dormant cell according to one or more aspects of the present disclosure is shown. The scheme 400 shows a scheduled virtual UL TX transmission. The scheme 400 includes a Pcell 402 and a Scell ​​404. The Pcell 402 can be substantially similar to the Pcell 232 and / or 302, and the Scell ​​404 can be substantially similar to the Scell ​​234 and / or 304. For example, the Pcell 402 can operate on a licensed band, and the Scell ​​404 can operate on an unlicensed band. The Scell ​​404 in the scheme 400 is in a dormant state. When the Scell ​​404 is dormant, the UE 215 will not monitor the PDCCH of the Scell ​​404. During the dormant state, it is expected to perform LBT measurements periodically. The BS 205 can configure the UE 215 to perform "virtual" UL transmission (TX) operations, such as virtual UL TX 408, 410 and 412. These virtual UL TX operations are "virtual" because the UE 215 does not send any signal to the BS. Instead, the virtual UL TX operations are used to trigger the UE 215 to perform LBT measurements. Thus, the virtual UL TXs 408, 410, and 412 are virtual UL allocations that may include specific time-frequency resources (e.g., RBs). For example, the UE 215 may perform LBT measurements in each of the virtual UL TXs 408, 410, and 412. The LBT measurements may be based on the above description of the LBT measurements. Figure 1 Energy detection as discussed. For example, UE 215 can determine whether LBT is successful or failed based on whether the channel measurement exceeds an energy detection threshold. In some cases, the LBT measurement can be based on CAT2 LBT. In some other cases, the LBT measurement can be based on CAT4 LBT. If the LBT measurement fails (e.g., the channel is occupied by another transmitter), the UE 215 can report an LBT failure indication 414 to the BS 205 through any available serving cell (including Pcell 402) that is not dormant or active.

[0066] LBT measurements may be performed in addition to any other measurements such as CSI measurements, AGC, and beam management (if configured). CSI measurements may give some indication of the signal quality on the channel, but do not directly translate into whether the UE can perform UL transmissions via LBT, or whether the UE is subject to hidden node interference. The configuration settings for controlling whether UL LBT failure detection is performed may be the same settings as the settings for controlling whether CSI measurements and / or beam management are performed, or separate settings. In other words, BS 205 may configure UE 215 via a single configuration (e.g., an RRC configuration) for all measurements including CSI, AGC, beams, UL LBT failure detection, or via separate configurations (one configuration for CSI, AGC, and / or beams and another configuration for LBT failure detection). Similarly, BS 205 may configure UE 215 to report CSI, AGC, beams, and / or UL LBT failure detection in a joint report or in separate reports.

[0067] Figure 5A DL LBT failure detection and reporting scheme 500 for a dormant cell according to one or more aspects of the present disclosure is shown. The scheme 500 shows that DL channel occupancy measurements are performed by listening to pre-configured DL messages in a dormant Scell. The scheme 500 includes a Pcell 502 and a Scell ​​504. The Pcell 402 can be substantially similar to the Pcell 232, 302, and / or 402, and the Scell ​​504 can be substantially similar to the Scell ​​234, 304, and / or 404. For example, the Pcell 502 can operate on a licensed band, and the Scell ​​504 can operate on an unlicensed band. UL / DL transmission 506 can be performed in the active Pcell 502. The Scell ​​504 is in a dormant state. When in the dormant state, DL allocations can be pre-configured for the Scell ​​504, such as pre-configured DL allocations 508, 510, and 512, which can include specific time-frequency resources (e.g., RBs). In some cases, the pre-configured DL allocations are associated with SSB transmissions. In some cases, the preconfigured DL allocation is associated with a DL DMRS transmission. Typically, the preconfigured DL allocation is used for DL ​​transmission regardless of whether the UE 215 is actively communicating with the BS 205. The preconfigured DL allocation is known to the UE 215 or is preconfigured for the UE 215 by the BS 205. Each preconfigured DL allocation allows the UE 215 to listen to the preconfigured DL signal, thereby performing channel occupancy measurements, such as DL LBT measurements. For example, the UE 215 can monitor the preconfigured DL signal from the BS 205. In the event of a DL failure (in order to detect a preconfigured DL signal), the UE 215 can report a DL failure indication 514 to the BS 205 through any available serving cell (including the Pcell 502). From the perspective of the UE 215, the DL failure indication 514 can provide the BS 205 with information associated with interference. For example, there may be a strong interference source near the UE 215. Therefore, although BS 205 may successfully obtain channel access to send a preconfigured DL signal, UE 215 may not be able to receive the preconfigured DL signal. Therefore, DL failure indication 514 may provide BS 205 with a hidden node that otherwise may not be detected by BS 205.

[0068] Scheme 500 is similar to scheme 400, but performs DL LBT failure detection instead of UL LBT failure detection. DL and UL failure detection in dormant Scells may be configured separately or jointly. For example, BS 205 may configure UE 215 in a single configuration (e.g., RRC configuration) or in separate configurations (e.g., RRC configuration) to perform UL LBT failure detection and DL failure detection in dormant cells. As in scheme 400, CSI measurement and beam management may also be configured separately or jointly with UL and / or DL ​​LBT failure detection. Similarly, DL and UL LBT failure detection reports may be sent separately or jointly. As with other aspects described herein, Figure 4 and Figure 5 The aspects shown in the can be implemented independently or in combination.

[0069] Figure 6An RSSI / CO measurement and reporting scheme 600 for a dormant cell according to one or more aspects of the present disclosure is shown. In the scheme 600, in addition to DL or UL LBT failure detection, in some aspects, the UE 215 can also be configured to perform RSSI and CO measurements in a dormant Scell. As shown, the scheme 600 includes a Pcell 602 and a Scell ​​604. The Pcell 602 can be substantially similar to the Pcell 232 and 302, 402 and / or 502, and the Scell ​​604 can be substantially similar to the Scell ​​234, 304, 404 and / or 504. For example, the Pcell 602 can operate on a licensed band, and the Scell ​​604 can operate on an unlicensed band. In some aspects, these measurements can be performed alone or in conjunction with other measurements. Thus, the scheme 600 shows that the active Pcell 602 performs UL / DL operations 606. BS205 can configure UE 215 to perform periodic RSSI / CO measurements in certain time-frequency resources, such as RSSI / CO measurements 608, 610, and 612, which can be referred to as RSSI / CO measurement opportunities. RSSI / CO measurements, such as RSSI / CO in SCell 604. For example, UE 215 can determine RSSI by measuring the signal energy in the channel. The signal can come from any node. In other words, RSSI can provide an indication of the strength of the interference source. In some instances, UE 215 can determine CO by determining the amount of time (in specific units) that the RSSI measurement exceeds a threshold within a measurement window or duration, for example, based on an RSSI measurement timing configuration (RMTC) or CO configuration provided by BS 205. UE 215 can report report 614, which can be reported to the BS after each measurement, according to some other schedule, or according to the request of the BS. UE 215 can report RSSI / CO report 614 to BS 205 through any available serving cell (including Pcell 602).

[0070] Figure 7An RSSI / CO measurement and reporting scheme 700 for a dormant cell according to one or more aspects of the present disclosure is shown. In the scheme 700, the UE 215 performs a one-shot RSSI / CO measurement in a dormant Scell. The scheme 700 includes a Pcell 702 and a Scell ​​704. The Pcell 702 may be substantially similar to the Pcells 232 and 302, 402, 502, and / or 602, and the Scell ​​704 may be substantially similar to the Scells 234, 304, 404, 504, and / or 604. For example, the Pcell 702 may operate on a licensed band, and the Scell ​​704 may operate on an unlicensed band. The Pcell 702 may maintain UL / DL 706 because it is an active cell. The Scell ​​704 is in a dormant state. While in the dormant state, the BS 205 may send a Pcell trigger 710 message through the Pcell 702. The Pcell trigger 710 causes the UE 215 to perform a single RSSI / CO 712 measurement in the Scell ​​704. The BS 205 may determine when to send the Pcell trigger 710 message to the UE 215. The BS 205 may send the Pcell trigger 710 message in anticipation of activating the Scell ​​704 or when activating the Scell ​​704. In response to the Pcell trigger 710, the UE 215 performs a single RSSI / CO 712 measurement in the Scell ​​704. The single RSSI / CO 712 measurement may refer to an RSSI / CO measurement within a duration, rather than a single RSSI / CO measurement as described above. Figure 6 After measurement 712, UE 215 reports the measurement to BS 205 in RSSI / CO report 714. UE 215 may report RSSI / CO report 714 to BS 205 over any available serving cell, including Pcell 702. This single RSSI / CO measurement may be performed independently or in conjunction with other measurements described herein.

[0071] In some aspects, the BS 205 may utilize the single RSSI / CO measurement scheme 700 shortly before switching the UE 215 from the sleep mode to the non-sleep mode in the Scell ​​704. For example, if the RSSI / CO indicates that the Scell ​​704 has a high probability (e.g., the channel is not congested and the interference is weak) for the BS 205 to obtain channel access in the Scell ​​704 and communicate with the UE 215, the BS 205 may proceed with the handover. If the RSSI / CO indicates that the Scell ​​704 has a low probability (e.g., the channel is congested and the interference is strong) for the BS 205 to obtain channel access and communicate with the UE 215, the BS 205 may not perform the handover. Therefore, the single RSSI / CO measurement may further avoid causing the BS 205 to switch the UE 215 to the sleep mode in the Scell ​​704 and fail to obtain channel access.

[0072] Figure 8 An LBT fault detection and RSSI / CO measurement scheme 800 for an inactive DRX configuration on-duration according to one or more aspects of the present disclosure is shown. The x-axis represents time in some arbitrary units. The y-axis represents frequency in some arbitrary units. The scheme 800 can be adopted by a BS (such as 105 and 205) and a UE (such as 115 and 215) in a network (such as network 100) for communication. In the scheme 800, the BS 205 can configure the UE 215 to perform channel occupancy measurements during the inactive configuration on-duration of the DRX cycle. The DRX cycle 818 includes an on-duration 820, during which the UE 215 may potentially send UL data or receive DL data. The DRX cycle 818 and / or the on-duration 820 can have any suitable duration. The DRX cycle 818 can be periodic (as shown by 818 (n-1), 818 (n) and 818 (n+1)). Each on-duration 820 is preceded by a WUS monitoring period 806, which can also be referred to as a WUS monitoring opportunity. The gap between the WUS monitoring period 806 and the on-duration 820 may be relatively small (e.g., on the order of about 2-3 ms). This gap may provide time for the UE 215 to switch on its additional front-end components (e.g., at the RF, such as the UE 215) when a WUS is detected. Fig.12 During the WUS monitoring period 806, the UE 215 may perform WUS monitoring 808 prior to the on-duration 820 of the DRX cycle 818(n), and if a WUS is received, the subsequent on-duration 820 is active. Figure 8As shown, the UE 215 receives a WUS 830 during the WUS monitoring 808, allowing UL / DL 810 to occur during the on-duration 820 in the DRX cycle 818(n). At the end of the on-duration 820, the UE 215 may enter a lower mode or sleep mode for the remainder of the DRX cycle 818(n). The lack of a WUS during the WUS monitoring 812 means that no UL / DL will occur during the subsequent on-duration 820 of the DRX cycle 818(n+1).

[0073] According to some aspects, the inactive on-duration of the DRX cycle can be utilized to make certain channel occupancy measurements, similar to those made in the previously described aspects. For example, the virtual UL allocation 814 can be configured such that UL LBT measurements are performed during the inactive on-duration 820 in the DRX cycle 818(n+1). In addition, DL LBT measurements can be performed by listening to the preconfigured DL 816 (e.g., based on the preconfigured DL allocation) during the inactive on-duration 820 in the DRX cycle 818(n+1). In some aspects, the BS 205 can also configure the UE 215 to perform RSSI / CO measurements, as described above with respect to Figure 6 and Figure 7 as discussed. The BS 205 may configure the UE 215 to perform any combination of UL LBT failure detection (based on virtual UL allocation 814), DL LBT failure detection (based on preconfigured DL 816), and / or RSSI / CO measurements. In some aspects, only UL LBT measurements are configured, in other aspects, only DL LBT measurements are configured, in other aspects, only RSSI / CO measurements are configured, in other aspects, UL and DL LBT measurements are configured, and in some aspects, all UL LBT, DL LBT, and RSSI / CO measurements are configured. In some aspects, the UL LBT, DL LBT, and RSSI / CO measurements are independently configurable, and in some aspects, they share a single configuration.

[0074] In some aspects, BS 205 can configure UE 215 to perform the above-mentioned combination of Figure 4 , Figure 5 , Figure 6 , Figure 7 or Figure 8Any combination of the schemes 400, 500, 600, 700 and / or 800 discussed. In some aspects, when the UE operates in a sleep mode of a cell or a DRX mode of a cell, the BS 205 may send a configuration for the UE to perform UL LBT fault detection, DL LBT fault detection, and RSSI / CO measurement in the cell. The configuration may indicate a virtual UL allocation, a DL pre-configured allocation, and / or an RSSI / CO measurement opportunity. The configuration may also include an indication indicating whether the UE performs UL LBT fault detection, DL LBT fault detection, and RSSI / CO measurement while in sleep mode or while in DRX mode during an inactive configuration on duration. The indication may include multiple bits, each enabling one of the UL LBT fault detection, DL LBT fault detection, and RSSI / CO measurements. For example, a bit value of 1 may enable a corresponding measurement or indication, while a bit value of 0 may disable the corresponding measurement or indication. In some aspects, the configuration may be the same configuration as the CSI / beam measurement configuration. In some other aspects, the BS 205 may configure the UE 215 with a separate configuration for each type of measurement. Similarly, the BS 205 may configure the UE 215 to report all measurement types (eg, LBT failure detection, DL LBT failure detection, RSSI / CO measurements) using joint reporting or to use separate reporting for different types of measurements.

[0075] Fig. 9 An LBT failure detection and RSSI / CO measurement scheme 900 for a dormant cell according to one or more aspects of the present disclosure is shown. The scheme 900 is implemented between a UE 902 (e.g., UE 115 and / or 215) and a BS 904 (e.g., BS 105 and / or 205). In the scheme 900, the BS 904 configures the UE 902 to perform channel occupancy measurements when the UE 902 operates in a dormant mode.

[0076] At action 906, UE 902 and BS 904 establish communication. For example, UE 902 may perform the above-described Figure 1 The random access procedure in question is used to establish an RRC connection with the BS 904 for communication.

[0077] In action 908, BS 904 configures UE 902 with a configuration for performing channel occupancy measurements in a dormant cell. The configuration may include information on when to perform channel occupancy measurements and what type of measurements to perform. In some instances, the configuration may include information such as described above with respect to Figure 4 The configuration of the virtual UL allocation shown in the discussed scheme 400. In some examples, the configuration may include a configuration for a pre-configured DL allocation, as described above with respect to Figure 5As shown in the scheme 500 discussed above. In some examples, the configuration may include configuration for RSSI / CO timing, as described above with respect to Figure 6 As shown in scheme 600 discussed.

[0078] At action 910, at some time after configuration, UE 902 enters a dormant state for the Scell. For example, BS 904 may send a configuration to configure the UE to enter a dormant state. UE 902 may stop PDCCH monitoring in the Scell.

[0079] At action 912, while in the dormant state, UE 902 performs a channel occupancy measurement. The channel occupancy measurement is performed as configured at action 908. The channel occupancy measurement may be any measurement previously described, such as the UL LBT measurement in scheme 400 and the DL LBT measurement in scheme 500 and the RSSI / CO measurement in schemes 600 and / or 700.

[0080] In action 914, after having performed the measurements, the UE 902 reports information associated with the measurements. In some aspects, when the UE 902 detects a failure condition (e.g., UL LBT failure, DL LBT failure, and / or RSSI / CO exceeds a certain channel occupancy threshold), the UE 902 can send a report to the BS 904.

[0081] Fig.10 An LBT failure detection and RSSI / CO measurement scheme 1000 for inactive DRX configuration on-duration according to one or more aspects of the present disclosure is shown. The scheme 1000 is implemented between a UE 1002 (e.g., UE 115, 215, and / or 902) and a BS 1004 (e.g., BS 105, 205, and / or 904). In the scheme 1000, the BS 1004 configures the UE 1002 to perform channel occupancy measurements when the UE 1002 operates in DRX mode.

[0082] At action 1006, UE 1002 and BS 1004 establish communication. For example, UE 1002 may perform the above-described Figure 1 The random access procedure in question is used to establish an RRC connection with the BS 1004 for communication.

[0083] In action 1008, BS 1004 configures UE 1002 with a configuration for performing channel occupancy measurements while in DRX mode. The configuration may include information on when to perform channel occupancy measurements and what type of measurements to perform. In some instances, the configuration may include information such as described above with respect to Figure 4The configuration of the virtual UL allocation shown in the discussed scheme 400. In some examples, the configuration may include a configuration for a pre-configured DL allocation, as described above with respect to Figure 5 As shown in the scheme 500 discussed above. In some examples, the configuration may include configuration for RSSI / CO timing, as described above with respect to Figure 6 Some measurement opportunities (e.g., virtual UL allocations, preconfigured DL allocations, and / or RSSI / CO measurement opportunities) may fall within an inactive DRX configuration duration, e.g., as described above with respect to Figure 8 The scheme 800 discussed is shown.

[0084] At act 1010, at some point in time after configuration, UE 1002 may enter a DRX cycle (eg, DRX cycle 818).

[0085] In action 1012, during the DRX cycle, the UE 1002 listens for a WUS (eg, WUS 830) in the channel. For example, the WUS may have a specific waveform, and the UE 1002 may calculate a correlation between a signal captured from the channel and the WUS waveform to determine whether the WUS exists.

[0086] If BS 1004 expects UE 1002 to become active, for example, due to traffic of UE 1002, BS 1004 sends a WUS signal in action 1014.

[0087] At decision block 1016, UE 1002 determines whether a WUS is received. If a WUS is received, then at action 1018, the UE wakes up for the On Duration. For example, UE 1002 may power up or switch to active the front-end components of the UE 1002 front end. During the On Duration, UE 1002 may monitor the PDCCH from BS 1004 and perform any UL / DL communications or other operations during the wake-up period. At the end of the wake-up period or the On Duration, UE 1002 repeats the DRX cycle and returns to action 1012 to listen for the next WUS.

[0088] If no WUS is received at decision block 1016, the UE 1002 may determine whether a channel occupancy measurement opportunity (e.g., a virtual UL allocation, a preconfigured DL allocation, or an RSSI / CO opportunity) is within an upcoming on-duration. Because no WUS is received for the upcoming on-duration, the on-duration may be referred to as an inactive configured on-duration. If there is a configured channel occupancy measurement opportunity in the inactive configured on-duration, the UE 1002 performs a channel occupancy measurement at action 1020. In other words, the channel occupancy measurement occurs during the inactive configured on-duration. The measurement is performed according to the configuration performed at action 1008. Channel occupancy may include UL LBT measurements triggered by a virtual UL transmission, as described above with respect to Figure 4 It may also include, or only include, DL LBT measurements performed by listening to pre-configured DL signals, as discussed above with respect to Figure 5 discussed.

[0089] In action 1022, after performing the measurements, the UE 1002 may report information based on the one or more measurements to the BS 1004. In some aspects, the UE 1002 may send a report to the BS 1004 when the UE 1002 detects a failure condition (e.g., UL LBT failure, DL LBT failure, and / or RSSI / CO exceeds a certain channel occupancy threshold).

[0090] When performing multiple of UL LBT, DL LBT, RSSI / CO measurements, UE 1002 may report the measurement information together in a joint report, or report the measurement information separately in separate reports.

[0091] Fig.11 1 is a block diagram of an exemplary BS 1100 according to one or more aspects of the present disclosure. BS 1100 may be the above Figure 1-Figure 10 105, BS 205, BS 904, BS 1004 discussed in. As shown, BS 1100 may include a processor 1102, a memory 1104, a channel occupancy measurement module 1108, a transceiver 1110 including a modem subsystem 1112 and a radio frequency (RF) unit 1114, and one or more antennas 1116. These elements may communicate with each other directly or indirectly, for example via one or more buses.

[0092] The processor 1102 may have various characteristics as a specific type of processor. For example, these may include a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein. The processor 1102 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration.

[0093] Memory 1104 may include cache memory (e.g., cache memory of processor 1102), random access memory (RAM), magnetoresistive RAM (MRAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, solid-state storage devices, hard drives, other forms of volatile and non-volatile memory, or a combination of different types of memory. In one aspect, memory 1104 includes non-transitory computer-readable media. Memory 1104 may store instructions 1106. Instructions 1106 may include instructions that, when executed by processor 1102, cause processor 1102 to perform operations described herein (e.g., Figure 3-Figure 10 Instructions 1106 may also be referred to as code. The terms "instructions" and "code" should be broadly interpreted to include any type of computer-readable statement(s). For example, the terms "instructions" and "code" may refer to one or more programs, routines, subroutines, functions, processes, etc. "Instructions" and "code" may include a single computer-readable statement or multiple computer-readable statements.

[0094] The channel occupancy measurement module 1108 may be implemented via hardware, software, or a combination thereof. For example, the channel occupancy measurement module 1108 may be implemented as a processor, circuit, and / or instruction 1106 stored in the memory 1104 and executed by the processor 1102. In some examples, the channel occupancy measurement module 1108 may be integrated into the modem subsystem 1112. For example, the channel occupancy measurement module 1108 may be implemented by a combination of software components (e.g., executed by a DSP or general purpose processor) and hardware components (e.g., logic gates and circuits) within the modem subsystem 1112.

[0095] The channel occupancy measurement module 1108 may be used in various aspects of the present disclosure. The channel occupancy measurement module 1108 may be used to configure the UE to perform channel occupancy measurements of different types and under different conditions, and receive reports from the UE, as described herein, e.g. Figure 3-Figure 10In some aspects, the channel occupancy measurement module 1108 is configured to send a LBT failure detection configuration associated with at least one of a sleep mode or a DRX cycle in a first cell to a UE (e.g., UE 115, 215, 902, and / or 1002). In some aspects, the first cell is an Scell ​​in an unlicensed band. The configuration may include which type of measurement to perform, when to perform, and what results should be reported back. LBT failure detection can be based on UL and / or DL ​​LBT measurements, as described above with respect to Figure 4 , Figure 5 and Figure 8 As in the schemes 400, 500 and 800 discussed above. The channel occupancy measurement module 1108 is also configured to receive an LBT failure detection report from the UE based on the LBT failure detection configuration, the failure detection report indicating LBT failure detection performed by the UE in the first cell when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of a DRX cycle. In some aspects, the report includes an indication of UL and / or DL ​​LBT failure.

[0096] In some aspects, the channel occupancy measurement module 1108 may also be configured to configure the UE to perform periodic RSSI / CO measurements and / or aperiodic RSS / CO measurements at intervals triggered by RSSI / CO measurement opportunities in the cell when the UE is operating in sleep mode in the cell or during an inactive DRX configuration on duration, and receive a report of RSSI / CO measurements from the UE via an active or non-dormant cell, as described above with respect to Figure 6 , Figure 7 and Figure 8 As in the discussed schemes 600, 700 and 800.

[0097] As shown, the transceiver 1110 may include a modem subsystem 1112 and an RF unit 1114. The transceiver 1110 may be configured to communicate bidirectionally with other devices, such as a UE 115 and / or another core network element. The modem subsystem 1112 may be configured to modulate and / or encode data from the memory 1104 and / or the channel occupancy measurement module 1108 according to an MCS (e.g., an LDPC coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.). The RF unit 1114 may be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) a transmission originating from another source such as a UE 115 or BS 105 or modulated / encoded data (e.g., RRC configuration, channel occupancy measurement configuration, LBT fault detection configuration, sleep mode configuration, DRX mode configuration, SSB, reference signal, DMRS) from the modem subsystem 1112 (on outbound transmissions). The RF unit 1114 may also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as integrated together in transceiver 1110, modem subsystem 1112 and RF unit 1114 may be separate devices that are coupled together at BS 1100 to enable BS 1100 to communicate with other devices.

[0098] The RF unit 1114 can provide modulated and / or processed data, such as data packets (or, more generally, data messages that can include one or more data packets and other information), to the antenna 1116 for transmission to one or more other devices. The antenna 1116 can also receive data messages sent from other devices and provide received data messages for processing and / or demodulation at the transceiver 1110. The transceiver 1110 can provide the demodulated and decoded data (e.g., UL LBT fault detection indication, DL LBT fault detection indication, RSSI / CO report) to the channel occupancy measurement module 1108 for processing. The antenna 1116 can include multiple antennas of similar or different designs to maintain multiple transmission links.

[0099] In some aspects, the transceiver 1110 is configured to communicate with components of the BS 1100 to send to the UE an LBT fault detection configuration associated with at least one of a sleep mode or a DRX cycle in the first cell, and receive an LBT fault detection report from the UE based on the LBT fault detection configuration, the fault detection report indicating an LBT fault detection performed by the UE in the first cell when the UE is operating in the sleep mode of the first cell or during an inactive DRX configuration on-duration of the DRX cycle.

[0100] In one aspect, the BS 1100 may include multiple transceivers 1110 that implement different RATs (e.g., NR and LTE). In one aspect, the BS 1100 may include a single transceiver 1110 that implements multiple RATs (e.g., NR and LTE). In one aspect, the transceiver 1110 may include various components, where different combinations of components may implement different RATs.

[0101] Fig.12 1 is a block diagram of an exemplary UE 1200 according to one or more aspects of the present disclosure. UE 1200 may be the Figure 1-Figure 10 115, 215, UE 902, UE 1002 discussed in. As shown, UE 1200 may include a processor 1202, a memory 1204, a channel occupancy measurement module 1208, a transceiver 1210 including a modem subsystem 1212 and an RF unit 1214, and one or more antennas 1216. These elements may communicate with each other directly or indirectly, for example via one or more buses.

[0102] The processor 1202 may include a CPU, a DSC, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein. The processor 1202 may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration.

[0103] Memory 1204 may include cache memory (e.g., cache memory of processor 1202), RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, solid-state storage devices, one or more hard disk drives, memristor-based arrays, other forms of volatile and non-volatile memory, or a combination of different types of memory. In one aspect, memory 1204 includes non-transitory computer-readable media. Memory 1204 may store instructions 1206. Instructions 1206 may include instructions that, when executed by processor 1202, cause processor 1202 to perform the aspects described herein in conjunction with the present disclosure (e.g., Figure 3-Figure 10 Instructions 1206 may also be referred to as code, which may be broadly interpreted to include (a plurality of) any type of computer-readable statements, such as those described above with reference to UE 115 and 215. Fig.11 discussed.

[0104] The channel occupancy measurement module 1208 may be implemented via hardware, software, or a combination thereof. For example, the channel occupancy measurement module 1208 may be implemented as a processor, circuit, and / or instruction 1206 stored in the memory 1204 and executed by the processor 1202. In some examples, the channel occupancy measurement module 1208 may be integrated into the modem subsystem 1212. For example, the channel occupancy measurement module 1208 may be implemented by a combination of software components (e.g., executed by a DSP or general purpose processor) and hardware components (e.g., logic gates and circuits) within the modem subsystem 1212.

[0105] The channel occupancy measurement module 1208 may be used in various aspects of the present disclosure. The channel occupancy measurement module 1208 may be used to configure the UE to perform channel occupancy measurements of different types and under different conditions, and receive reports from the UE, as described herein. Figure 3-Figure 10 In some aspects, the channel occupancy measurement module 1208 is configured to receive a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell. In some aspects, the first cell is a Scell ​​in an unlicensed band. The configuration may include which type of measurement to perform, when to perform, and what results should be reported back. LBT fault detection may be based on UL and / or DL ​​LBT measurements, as described above with respect to Figure 4 , Figure 5 and Figure 6 As in the schemes 400, 500 and 600 discussed above. The channel occupancy measurement module 1208 is also configured to perform LBT fault detection in the first cell based on the LBT fault detection configuration when operating in the sleep mode of the first cell or during the inactive DRX configuration on duration of the DRX cycle. In some aspects, the LBT fault detection measurement is performed in response to a virtual UL transmission. In some aspects, the LBT fault detection measurement is performed by listening to a preconfigured DL signal. In some aspects, the channel occupancy measurement module 1208 is configured to send an LBT fault detection report based on the LBT fault detection. In one example, the report indicates a fault of the LBT measurement indicating that the channel is not open for communication.

[0106] In some aspects, the channel occupancy measurement module 1208 may also be configured to perform periodic RSSI / CO measurement and / or aperiodic RSS / CO measurement at intervals triggered by RSSI / CO measurement opportunities in the cell when the UE 1200 is in sleep mode operation of the first cell or during an inactive DRX configuration on-duration period, and send a report of RSSI / CO measurement to the BS through an active or non-dormant cell, as described above with respect to Figure 6 , Figure 7 and Figure 8 As in the discussed schemes 600, 700 and 800.

[0107] As shown, the transceiver 1210 may include a modem subsystem 1212 and an RF unit 1214. The transceiver 1210 may be configured to communicate bidirectionally with other devices, such as the BS 105 and / or another core network element. The modem subsystem 1212 may be configured to modulate and / or encode data from the memory 1204 and / or the channel occupancy measurement module 1208 according to a modulation and coding scheme (MCS) (e.g., a low-density parity check (LDPC) coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.). The RF unit 1214 may be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) a transmission originating from another source (e.g., UE 115 or BS 105) or modulated / encoded data (e.g., UL LBT fault detection indication, DL LBT fault detection indication, RSSI / CO report) from the modem subsystem 1212 (on outbound transmission). The RF unit 1214 may also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as integrated together in transceiver 1210, modem subsystem 1212 and RF unit 1214 may be separate devices that are coupled together at UE 115 to enable UE 115 to communicate with other devices.

[0108] The RF unit 1214 can provide modulated and / or processed data, such as data packets (or, more generally, data messages that can contain one or more data packets and other information), to the antenna 1216 for transmission to one or more other devices. The antenna 1216 can also receive data messages sent from other devices and provide received data messages for processing and / or demodulation at the transceiver 1210. The transceiver 1210 can provide demodulated and decoded data (e.g., RRC configuration, channel occupancy measurement configuration, LBT fault detection configuration, sleep mode configuration, DRX mode configuration, SSB, reference signal, DMRS) to the channel occupancy measurement module 1208 for processing. The antenna 1216 can include multiple antennas of similar or different designs to maintain multiple transmission links.

[0109] In some aspects, the transceiver 1210 is configured to communicate with components of the UE 1200 to receive a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell. The processor 1202 is configured to communicate with components of the UE 1200 to perform LBT fault detection in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle based on the LBT fault detection configuration. The transceiver 1210 is also configured to communicate with components of the UE 1200 to send an LBT fault detection report based on the LBT fault detection.

[0110] In one aspect, the UE 1200 may include multiple transceivers 1210 that implement different RATs (e.g., NR and LTE). In one aspect, the UE 1200 may include a single transceiver 1210 that implements multiple RATs (e.g., NR and LTE). In one aspect, the transceiver 1210 may include various components, where different combinations of components may implement different RATs.

[0111] Fig.13 A flow chart of a wireless communication method 1300 according to some aspects of the present disclosure is shown. The steps of the method 1300 may be performed by a computing device (e.g., a processor, a processing circuit, and / or other suitable components) or other suitable components of a wireless communication device for performing the steps. For example, a wireless communication device such as UE 115, UE 215, 902, 1002, or UE 1200 may utilize one or more components (e.g., a processor 1202, a memory 1204, a channel occupancy measurement module 1208, a transceiver 1210, a modem subsystem 1212, an RF unit 1214, and one or more antennas 1216) to perform the steps of the method 1300. The method 1300 may be implemented in the same manner as described above with reference to Figure 3-Figure 10 Similar mechanisms are described in schemes 300, 400, 500, 600, 700, 800, 900 and 1000. As shown, method 1300 includes many of the steps listed, but aspects of method 1300 may include additional steps before, after, and between the steps listed. In some aspects, one or more of the steps listed may be omitted or performed in a different order.

[0112] At block 1310, a UE (e.g., UE 115, UE 215, 902, 1002, or UE 1200) receives a listen-before-talk (LBT) failure detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell. In some examples, the UE may receive the LBT failure detection configuration using one or more components (e.g., processor 1202, memory 1204, channel occupancy measurement module 1208, transceiver 1210, modem subsystem 1212, RF unit 1214, and one or more antennas 1216).

[0113] In some aspects, the first cell is an Scell ​​in an unlicensed band. The configuration may include which type of measurements are performed, when they are performed, and what results should be reported back. LBT failure detection may be based on UL and / or DL ​​LBT measurements. For example, the LBT failure detection configuration may include an indicator indicating whether the UE performs LBT failure detection when operating in sleep mode or when operating during an inactive DRX configuration on duration. In some aspects, LBT failure detection may include the above in combination with Figure 4 The set of uplink LBT failure detection opportunities (eg, virtual UL allocation) discussed above or a combination of the above Figure 5 At least one of a set of downlink LBT failure detection opportunities (eg, preconfigured DL allocations) in question.

[0114] At block 1320, based on the LBT failure detection configuration, the UE performs LBT failure detection in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of a DRX cycle. In some examples, the UE may utilize one or more components, such as a processor 1202, a memory 1204, a channel occupancy measurement module 1208, a transceiver 1210, a modem subsystem 1212, an RF unit 1214, and one or more antennas 1216, to perform LBT failure detection.

[0115] In some aspects, the UE may perform the Figure 4 and Fig. 9 The LBT discussed is to perform uplink LBT failure detection during an opportunity in a set of uplink LBT failure detection opportunities when operating in a sleep mode of a first cell. In some aspects, the UE may perform uplink LBT failure detection during an opportunity in a set of uplink LBT failure detection opportunities as described above with respect to Figure 5 and Fig. 9 The discussed measurement listening preconfigured DL signal monitors at least one of the SSB or the reference signal as discussed, and when operating in the sleep mode of the first cell, performs downlink LBT failure detection during an opportunity in the set of downlink LBT failure detection opportunities. In some aspects, the UE may monitor at least one of the SSB or the reference signal as discussed above with respect to the downlink LBT failure detection opportunity. Figure 8 and Fig.10 The discussed performing of LBT, performing uplink LBT failure detection during an opportunity in a set of uplink LBT failure detection opportunities within the inactive configuration on-duration. In some aspects, the UE may perform uplink LBT failure detection as described above with respect to Figure 8 and Fig.10 At least one of the monitored SSBs or reference signals discussed herein is used to perform downlink LBT failure detection during an opportunity in a set of downlink LBT failure detection opportunities configured as being within an inactive on-duration period.

[0116] At block 1330, the UE sends an LBT fault detection report based on the LBT fault detection. In some instances, the UE may utilize one or more components (e.g., processor 1202, memory 1204, channel occupancy measurement module 1208, transceiver 1210, modem subsystem 1212, RF unit 1214, and one or more antennas 1216) to send the LBT fault detection report.

[0117] In some aspects, the UE may send an LBT fault detection report based on LBT execution during an opportunity in a set of uplink LBT fault detection opportunities. In some aspects, the UE may send an LBT fault detection report based on preconfigured DL signal monitoring during an opportunity in a set of downlink LBT fault detection opportunities. In some aspects, the UE may send an LBT fault detection report based on LBT execution during an opportunity in a set of uplink LBT fault detection opportunities and preconfigured DL signal monitoring during an opportunity in a set of downlink LBT fault detection opportunities.

[0118] In some aspects, while operating in a sleep mode of a first cell, the UE may perform at least one of an RSSI measurement or a channel occupancy measurement in the first cell and report at least one of the RSSI measurement or the channel occupancy measurement to the BS, as described above with respect to Figure 6 , Figure 7 and Fig.10 In some aspects, the UE may perform at least one of an RSSI measurement or a channel occupancy measurement in the first cell during the inactive DRX configuration on-duration and report at least one of the RSSI measurement or the channel occupancy measurement to the BS, as described above with respect to Figure 8 and Fig.10 discussed.

[0119] In some aspects, the report indicates an LBT measurement failure, which indicates that the channel may be congested and thus may have a low probability of being available for communication.

[0120] Fig.14A flow chart of a wireless communication method 1400 according to some aspects of the present disclosure is shown. The steps of the method 1400 may be performed by a computing device (e.g., a processor, a processing circuit, and / or other suitable components) or other suitable components of a wireless communication device for performing the steps. For example, a wireless communication device such as BS 105, 205, 904, 1004, and 1100 may utilize one or more components (e.g., a processor 1102, a memory 1104, a channel occupancy measurement module 1108, a transceiver 1110, a modem subsystem 1112, an RF unit 1114, and one or more antennas 1116) to perform the steps of the method 1400. The method 1400 may be implemented in the same manner as described above with reference to Figure 3-Figure 10 Similar mechanisms are described in schemes 300, 400, 500, 600, 700, 800, 900 and 1000. As shown, method 1400 includes many of the listed steps, but aspects of method 1300 may include additional steps before, after, and between the listed steps. In some aspects, one or more of the listed steps may be omitted or performed in a different order.

[0121] At block 1410, a BS (e.g., BSs 105, 205, 904, 1004, and 1100) sends an LBT failure detection configuration associated with at least one of a sleep mode or a DRX cycle in a first cell to a UE (e.g., UE 115, UE 215, 902, 1002, or UE 1200). In an example, the first cell is an Scell ​​in an unlicensed band. In some instances, the BS may utilize one or more components (e.g., a processor 1102, a memory 1104, a channel occupancy measurement module 1108, a transceiver 1110, a modem subsystem 1112, an RF unit 1114, and one or more antennas 1116) to send the LBT failure detection configuration.

[0122] In some aspects, the first cell is an Scell ​​in an unlicensed band. The configuration may include which type of measurements are performed, when they are performed, and what results should be reported back. LBT failure detection may be based on UL and / or DL ​​LBT measurements. For example, the LBT failure detection configuration may include an indicator indicating whether the UE performs LBT failure detection when operating in sleep mode or when operating during an inactive DRX configuration on duration. In some aspects, LBT failure detection may include the above in combination with Figure 4 The set of uplink LBT failure detection opportunities (eg, virtual UL allocation) discussed above or a combination of the above Figure 5 At least one of a set of downlink LBT failure detection opportunities (eg, preconfigured DL allocations) in question.

[0123] At block 1420, the BS receives an LBT fault detection report from the UE based on the LBT fault detection configuration, the LBT fault detection report indicating LBT fault detection performed by the UE in the first cell when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of a DRX cycle. In some instances, the BS may utilize one or more components (e.g., a processor 1102, a memory 1104, a channel occupancy measurement module 1108, a transceiver 1110, a modem subsystem 1112, an RF unit 1114, and one or more antennas 1116) to receive the LBT fault detection report.

[0124] In some aspects, the BS may receive an LBT failure detection report based on LBT performed by the UE during an opportunity in a set of uplink LBT failure detection opportunities. In some aspects, the BS may receive an LBT failure detection report based on a preconfigured DL signal monitored by the UE during an opportunity in a set of downlink LBT failure detection opportunities. In some aspects, the BS may receive an LBT failure detection report based on LBT performed by the UE during an opportunity in a set of uplink LBT failure detection opportunities and a preconfigured DL signal monitored by the UE during an opportunity in a set of downlink LBT failure detection opportunities.

[0125] In some aspects, the BS may also receive a measurement report from the UE, the measurement report including at least one of a received signal strength indicator (RSSI) measurement or a channel occupancy measurement of the first cell measured when the UE is operating in a sleep mode of the first cell or operating during an inactive DRX configuration on duration, as described above with respect to Figure 6 , Figure 7 , Figure 8 and Fig.10 discussed.

[0126] Other embodiments of the present disclosure include a wireless communication method performed by a user equipment (UE). The wireless communication method includes receiving a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The wireless communication method also includes: based on the LBT fault detection configuration, performing LBT fault detection in the first cell when operating in the sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle. The wireless communication method also includes sending an LBT fault detection report based on the LBT fault detection.

[0127] The method may also include one or more of the following features. For example, the method includes: wherein receiving an LBT fault detection configuration includes receiving an LBT fault detection configuration, the fault detection configuration including an indicator indicating whether the UE performs LBT fault detection when operating in a sleep mode or when operating during an inactive DRX configuration on duration. Receiving the LBT fault detection configuration includes receiving an LBT fault detection configuration indicating at least one of an uplink LBT fault detection opportunity set or a downlink LBT fault detection opportunity set. Performing LBT fault detection includes performing at least one of an uplink LBT fault detection during an opportunity in an uplink LBT fault detection opportunity set or a downlink LBT fault detection during an opportunity in a downlink LBT fault detection opportunity set when operating in a sleep mode of a first cell. The first cell is a secondary cell of a wireless communication network. Sending an LBT fault detection report includes sending an LBT fault detection report to a network via a second cell of the network, the second cell being different from the first cell. Performing LBT fault detection includes performing at least one of uplink LBT fault detection during an opportunity in an uplink LBT fault detection opportunity set within an inactive DRX configuration on duration or downlink LBT fault detection during an opportunity in a downlink LBT fault detection opportunity set within an inactive DRX configuration on duration. The method may include monitoring a wake-up signal (WUS) within a first configured on duration in a DRX cycle; and determining that no WUS is detected within the first configured on duration, based on the determination, the first configured on duration corresponds to the inactive DRX configuration on duration. Receiving an LBT fault detection configuration includes receiving an LBT fault detection configuration indicating an uplink LBT fault detection opportunity set, wherein the opportunities in the uplink fault detection opportunity set are associated with a virtual uplink allocation. The method may include refraining from performing uplink transmission based on the virtual uplink allocation. Performing LBT fault detection includes performing LBT during opportunities in the uplink fault detection opportunity set based on the virtual uplink allocation. Sending an LBT fault detection report includes sending an LBT fault detection report based on the LBT associated with the virtual uplink allocation. Receiving an LBT fault detection configuration also includes receiving a first configuration indicating an uplink LBT fault detection opportunity set; and receiving a second configuration indicating a downlink LBT fault detection opportunity set. Receiving an LBT fault detection configuration also includes receiving an LBT fault detection configuration indicating an uplink LBT fault detection opportunity set and a downlink LBT fault detection opportunity set. Sending an LBT fault detection report includes transmitting an LBT fault detection report based on an LBT associated with a virtual uplink assignment and monitoring associated with a preconfigured downlink assignment.Receiving an LBT fault detection configuration also includes receiving an LBT fault detection configuration indicating a set of downlink LBT fault detection opportunities, wherein opportunities in the set of downlink fault detection opportunities are associated with preconfigured downlink allocations. The preconfigured downlink allocations are associated with at least one of a synchronization signal block (SSB) or a reference signal. Performing LBT fault detection includes monitoring a downlink preconfigured signal based on the preconfigured downlink allocation during an opportunity in the set of downlink fault detection opportunities. Sending an LBT fault detection report includes sending an LBT fault detection report based on the monitoring. Receiving an LBT fault detection configuration also includes receiving a configuration including a signal measurement configuration and an LBT fault detection configuration, the signal measurement configuration being associated with at least one of a beam measurement or a channel state information (CSI) measurement. The method may include: determining at least one of a received signal strength indicator (RSSI) measurement or a channel occupancy measurement in the first cell when operating in a sleep mode of the first cell or when operating during an inactive DRX configuration on duration; and sending a measurement report including at least one of the RSSI measurement or the channel occupancy measurement. Determining at least one of an RSSI measurement or a channel occupancy measurement includes: while operating in a sleep mode of the first cell, determining at least one of an RSSI measurement or a channel occupancy measurement in the first cell; and sending a measurement report includes sending the measurement report to the network via a second cell of the wireless communication network, the second cell being different from the first cell. The method may include receiving a request for a measurement report; and in response to the measurement report, receiving an instruction to switch the first cell from a sleep mode to a non-sleep mode. Receiving an LBT fault detection configuration includes receiving an LBT fault detection configuration, the fault detection configuration including a periodic measurement configuration associated with at least one of an RSSI measurement or a channel occupancy measurement.

[0128] Other embodiments of the present disclosure include a wireless communication method performed by a base station (BS). The wireless communication method includes: sending a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network to a user equipment (UE); and receiving an LBT fault detection report from the UE based on the LBT fault detection configuration, the fault detection report indicating the LBT fault detection performed by the UE in the first cell when the UE is operating in the sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle.

[0129] The method may also include one or more of the following features. For example, the method includes: wherein sending an LBT fault detection configuration includes sending an LBT fault detection configuration, the fault detection configuration including an indicator indicating whether the UE performs LBT fault detection when operating in sleep mode or when operating during an inactive DRX configuration on-duration period. Sending an LBT fault detection configuration includes sending an LBT fault detection configuration indicating at least one of an uplink LBT fault detection opportunity set or a downlink LBT fault detection opportunity set. The LBT fault detection is associated with at least one of the opportunities in the uplink LBT fault detection opportunity set or the opportunities in the downlink LBT fault detection opportunity set. The first cell is a secondary cell of the network. Receiving an LBT fault detection report includes receiving an LBT fault detection report from the UE via a second cell of the wireless communication network, the second cell being different from the first cell. At least one of the opportunities in the uplink LBT fault detection opportunity set or the opportunities in the downlink LBT fault detection opportunity set is within the inactive DRX configuration on-duration period. Sending an LBT fault detection configuration includes sending an LBT fault detection configuration indicating an uplink LBT fault detection opportunity set, wherein the opportunities in the uplink LBT fault detection opportunity set are associated with a virtual uplink allocation. Receiving an LBT fault detection report includes receiving an LBT fault detection report based on the virtual uplink allocation. Sending an LBT fault detection configuration also includes sending a first configuration indicating an uplink LBT fault detection opportunity set; and sending a second configuration indicating a downlink LBT fault detection opportunity set. Sending an LBT fault detection configuration also includes sending an LBT fault detection configuration indicating an uplink LBT fault detection opportunity set and a downlink LBT fault detection opportunity set. Receiving an LBT fault detection report includes receiving an LBT fault detection report based on a virtual uplink allocation and a preconfigured downlink allocation. Sending an LBT fault detection configuration also includes sending an LBT fault detection configuration indicating a downlink LBT fault detection opportunity set, wherein the opportunities in the downlink LBT fault detection opportunity set are associated with a preconfigured downlink allocation. The preconfigured downlink allocation is associated with at least one of a synchronization signal block (SSB) or a reference signal. Receiving the LBT failure detection report includes receiving the LBT failure detection report based on a preconfigured downlink allocation. Sending the LBT failure detection configuration includes sending a configuration including a signal measurement configuration and the LBT failure detection configuration, the signal measurement configuration being associated with at least one of a beam measurement or a channel state information (CSI) measurement. The method may include receiving a measurement report from a UE, the measurement report including at least one of a received signal strength indicator (RSSI) measurement or a channel occupancy measurement of a first cell measured when the UE is operating in a sleep mode of the first cell or operating during an inactive DRX configuration on duration.Receiving a measurement report includes receiving a measurement report from a UE via a second cell of a wireless communication network, the measurement report including at least one of an RSSI measurement or a channel occupancy measurement of the first cell, the second cell being different from the first cell. The method may include sending a request for the measurement report to the UE; and sending an instruction to the UE based on the measurement report to switch from a sleep mode to a non-sleep mode in the first cell. Sending an LBT fault detection configuration includes sending an LBT fault detection configuration to the UE, the fault detection configuration including a periodic measurement configuration associated with at least one of the RSSI measurement or the channel occupancy measurement.

[0130] Other embodiments of the present disclosure include user equipment (UE). The user equipment includes a transceiver configured to receive a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The user equipment also includes a processor configured to perform LBT fault detection in the first cell based on the LBT fault detection configuration when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle. The user equipment also includes wherein the transceiver is further configured to send an LBT fault detection report based on the LBT fault detection.

[0131] The UE may also include one or more of the following features. For example, the user equipment includes: wherein the LBT fault detection configuration includes an indicator indicating whether the UE is to perform LBT fault detection when operating in a sleep mode or during an inactive DRX configuration on-duration period. The LBT fault detection configuration indicates at least one of an uplink LBT fault detection opportunity set or a downlink LBT fault detection opportunity set. The processor configured to perform LBT fault detection is also configured to perform at least one of an uplink LBT fault detection during an opportunity in the uplink LBT fault detection opportunity set or a downlink LBT fault detection during an opportunity in the downlink LBT fault detection opportunity set when operating in a sleep mode of a first cell. The first cell is a secondary cell of a wireless communication network. The transceiver is configured to send an LBT fault detection report to the network via a second cell of the network, the second cell being different from the first cell. The processor configured to perform LBT fault detection is further configured to perform at least one of uplink LBT fault detection during an opportunity in an uplink LBT fault detection opportunity set within an inactive DRX configuration on duration or downlink LBT fault detection during an opportunity in a downlink LBT fault detection opportunity set within an inactive DRX configuration on duration. The processor is further configured to monitor a wake-up signal (WUS) within a first configured on duration in a DRX cycle; and the processor is further configured to determine that no WUS is detected within the first configured on duration, based on the determination, the first configured on duration corresponds to the inactive DRX configuration on duration. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set, wherein the opportunities in the uplink fault detection opportunity set are associated with a virtual uplink allocation. The transceiver is further configured to suppress performing uplink transmission based on the virtual uplink allocation. The processor configured to perform LBT fault detection is further configured to perform LBT during opportunities in the uplink fault detection opportunity set based on the virtual uplink allocation. The LBT fault detection report is based on the LBT associated with the virtual uplink allocation. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set; and the transceiver is further configured to receive a second configuration indicating a downlink LBT fault detection opportunity set. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set and a downlink LBT fault detection opportunity set. The LBT fault detection report is based on an LBT associated with a virtual uplink allocation and monitoring associated with a preconfigured downlink allocation. The LBT fault detection configuration indicates a downlink LBT fault detection opportunity set, wherein the opportunities in the downlink fault detection opportunity set are associated with a preconfigured downlink allocation. The preconfigured downlink allocation is associated with at least one of a synchronization signal block (SSB) or a reference signal.The LBT fault detection also includes monitoring a downlink preconfigured signal based on a preconfigured downlink allocation during a time in the downlink fault detection time set. The LBT fault detection report is based on the monitoring. The LBT fault detection configuration also includes a signal measurement configuration and an LBT fault detection configuration, the signal measurement configuration being associated with at least one of a beam measurement or a channel state information (CSI) measurement. The processor is also configured to determine at least one of a received signal strength indicator (RSSI) measurement or a channel occupancy measurement in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration; and the transceiver is also configured to send a measurement report including at least one of the RSSI measurement or the channel occupancy measurement. The measurement report is sent to the network via a second cell of the wireless communication network, the second cell being different from the first cell. The transceiver is also configured to receive a request for a measurement report; and the transceiver is also configured to receive an instruction to switch the first cell from a sleep mode to a non-sleep mode in response to the measurement report. The LBT fault detection configuration includes a period measurement configuration associated with at least one of the RSSI measurement or the channel occupancy measurement.

[0132] Other embodiments of the present disclosure include a base station (BS). The base station includes a transceiver configured to send a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network to a user equipment (UE); and wherein the transceiver is further configured to receive an LBT fault detection report from the UE based on the LBT fault detection configuration, the fault detection report indicating an LBT fault detection performed by the UE in the first cell when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle.

[0133] The BS may also include one or more of the following features. For example, the base station includes: wherein the LBT fault detection configuration includes an indicator indicating whether the UE is to perform LBT fault detection when operating in a sleep mode or during an inactive DRX configuration on duration. The LBT fault detection configuration indicates at least one of an uplink LBT fault detection opportunity set or a downlink LBT fault detection opportunity set. The LBT fault detection is associated with at least one of the opportunities in the uplink LBT fault detection opportunity set or the downlink LBT fault detection opportunity set. The first cell is a secondary cell of the network. The LBT fault detection report is received via a second cell of the wireless communication network, the second cell being different from the first cell. At least one of the opportunities in the uplink LBT fault detection opportunity set or the downlink LBT fault detection opportunity set is within the inactive DRX configuration on duration. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set, wherein the opportunities in the uplink LBT fault detection opportunity set are associated with a virtual uplink allocation. The LBT fault detection report is based on the virtual uplink allocation. The LBT fault detection configuration also includes a first configuration indicating an uplink LBT fault detection opportunity set; and a second configuration indicating a downlink LBT fault detection opportunity set. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set and a downlink LBT fault detection opportunity set. The LBT fault detection report is based on a virtual uplink allocation and a preconfigured downlink allocation. The LBT fault detection configuration indicates a downlink LBT fault detection opportunity set, wherein the opportunities in the downlink LBT fault detection opportunity set are associated with a preconfigured downlink allocation. The preconfigured downlink allocation is associated with at least one of a synchronization signal block (SSB) or a reference signal. The LBT fault detection report is based on the preconfigured downlink allocation. The LBT fault detection configuration also includes a signal measurement configuration and an LBT fault detection configuration, the signal measurement configuration being associated with at least one of a beam measurement or a channel state information (CSI) measurement. The transceiver is also configured to receive a measurement report from the UE, the measurement report including at least one of a received signal strength indicator (RSSI) measurement or a channel occupancy measurement of the first cell measured when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on-duration.

[0134] Other embodiments of the present disclosure include a non-transitory computer-readable medium having program code recorded thereon. The non-transitory computer-readable medium includes code for causing a UE to receive a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The non-transitory computer-readable medium also includes code for causing the UE to perform LBT fault detection in the first cell based on the LBT fault detection configuration when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle. The non-transitory computer-readable medium also includes code for causing the UE to send an LBT fault detection report based on the LBT fault detection.

[0135] The non-transitory computer-readable medium may also include one or more of the following features. For example, the non-transitory computer-readable medium includes: wherein the LBT fault detection configuration includes an indicator indicating whether the UE is to perform LBT fault detection when operating in sleep mode or during an inactive DRX configuration on-duration period. The LBT fault detection configuration indicates at least one of an uplink LBT fault detection opportunity set or a downlink LBT fault detection opportunity set. The code for causing the UE to perform LBT fault detection is also configured to, when operating in sleep mode of a first cell, perform at least one of an uplink LBT fault detection during an opportunity in the uplink LBT fault detection opportunity set or a downlink LBT fault detection during an opportunity in the downlink LBT fault detection opportunity set. The first cell is a secondary cell of a wireless communication network. The code for causing the UE to send an LBT fault detection report causes the LBT fault detection report to be sent to the network via a second cell of the network, the second cell being different from the first cell. The code for causing the UE to perform LBT fault detection is also configured to perform at least one of uplink LBT fault detection during an opportunity in an uplink LBT fault detection opportunity set within an inactive DRX configuration on duration or downlink LBT fault detection during an opportunity in a downlink LBT fault detection opportunity set within an inactive DRX configuration on duration. The non-transitory computer-readable medium may include code for causing the UE to monitor a wake-up signal (WUS) within a first configured on duration in a DRX cycle; and code for causing the UE to determine that no WUS is detected within the first configured on duration, based on the determination, the first configured on duration corresponds to the inactive DRX configuration on duration. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set, wherein the opportunities in the uplink fault detection opportunity set are associated with a virtual uplink allocation. The non-transitory computer-readable medium may include code for causing the UE to suppress performing uplink transmission based on the virtual uplink allocation. The code for causing the UE to perform LBT fault detection is also configured to perform LBT during opportunities in the uplink fault detection opportunity set based on the virtual uplink allocation. The LBT fault detection report is based on the LBT associated with the virtual uplink allocation. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set; and may include code for causing the UE to receive a second configuration indicating a downlink LBT fault detection opportunity set. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set and a downlink LBT fault detection opportunity set. The LBT fault detection report is based on the LBT associated with the virtual uplink allocation and monitoring associated with the preconfigured downlink allocation.The LBT fault detection configuration indicates a set of downlink LBT fault detection opportunities, wherein the opportunities in the set of downlink fault detection opportunities are associated with preconfigured downlink allocations. The preconfigured downlink allocations are associated with at least one of a synchronization signal block (SSB) or a reference signal. The code for causing the UE to perform LBT fault detection is also configured to monitor the downlink preconfigured signal based on the preconfigured downlink allocation during the opportunities in the set of downlink fault detection opportunities. The LBT fault detection report is based on the monitoring. The LBT fault detection configuration also includes a signal measurement configuration and an LBT fault detection configuration, the signal measurement configuration being associated with at least one of a beam measurement or a channel state information (CSI) measurement. The non-transitory computer-readable medium may include code for causing the UE to determine at least one of a received signal strength indicator (RSSI) measurement or a channel occupancy measurement in a first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration; and code for causing the UE to send a measurement report including at least one of the RSSI measurement or the channel occupancy measurement. The measurement report is sent to the network via a second cell of the wireless communication network, the second cell being different from the first cell. The transceiver is further configured to receive a request for a measurement report; and the transceiver is further configured to receive an instruction to switch the first cell from a sleep mode to a non-sleep mode in response to the measurement report. The LBT failure detection configuration includes a periodic measurement configuration associated with at least one of an RSSI measurement or a channel occupancy measurement.

[0136] Other embodiments of the present disclosure include a non-transitory computer-readable medium having program code recorded thereon. The non-transitory computer-readable medium includes code for causing a base station (BS) to send a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network to a user equipment (UE); and code for causing the BS to receive an LBT fault detection report from the UE based on the LBT fault detection configuration, the fault detection report indicating the LBT fault detection performed by the UE in the first cell when the UE is operating in the sleep mode of the first cell or during the inactive DRX configuration on duration of the DRX cycle.

[0137] The non-transitory computer-readable medium may also include one or more of the following features. For example, the non-transitory computer-readable medium includes: wherein the LBT fault detection configuration includes an indicator indicating whether the UE is to perform LBT fault detection when operating in sleep mode or during an inactive DRX configuration on duration. The LBT fault detection configuration indicates at least one of an uplink LBT fault detection opportunity set or a downlink LBT fault detection opportunity set. The LBT fault detection is associated with at least one of the opportunities in the uplink LBT fault detection opportunity set or the downlink LBT fault detection opportunity set. The first cell is a secondary cell of the network. The LBT fault detection report is received via a second cell of the wireless communication network, the second cell being different from the first cell. At least one of the opportunities in the uplink LBT fault detection opportunity set or the downlink LBT fault detection opportunity set is within the inactive DRX configuration on duration. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set, wherein the opportunities in the uplink LBT fault detection opportunity set are associated with a virtual uplink allocation. The LBT fault detection report is based on the virtual uplink allocation. The LBT fault detection configuration also includes a first configuration indicating an uplink LBT fault detection opportunity set; and a second configuration indicating a downlink LBT fault detection opportunity set. The LBT fault detection configuration indicates an uplink LBT fault detection opportunity set and a downlink LBT fault detection opportunity set. The LBT fault detection report is based on a virtual uplink allocation and a preconfigured downlink allocation. The LBT fault detection configuration indicates a downlink LBT fault detection opportunity set, wherein the opportunities in the downlink LBT fault detection opportunity set are associated with a preconfigured downlink allocation. The preconfigured downlink allocation is associated with at least one of a synchronization signal block (SSB) or a reference signal. The LBT fault detection report is based on a preconfigured downlink allocation. The LBT fault detection configuration also includes a signal measurement configuration and an LBT fault detection configuration, and the signal measurement configuration is associated with at least one of a beam measurement or a channel state information (CSI) measurement. The non-transitory computer-readable medium may include code for causing a BS to receive a measurement report from a UE, the measurement report including at least one of a received signal strength indicator (RSSI) measurement or a channel occupancy measurement of a first cell measured when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on-duration. The measurement report is received from the UE via a second cell of a wireless communication network, the measurement report including at least one of an RSSI measurement or a channel occupancy measurement of the first cell, the second cell being different from the first cell. The non-transitory computer-readable medium may include code for causing the BS to send a request for the measurement report to the UE; and code for causing the BS to send an instruction to the UE to switch from a sleep mode to a non-sleep mode in the first cell based on the measurement report.The LBT fault detection configuration includes a periodic measurement configuration associated with at least one of an RSSI measurement or a channel occupancy measurement.

[0138] Other embodiments of the present disclosure include a user equipment (UE). The user equipment includes a component for receiving a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network. The user equipment also includes a component for performing LBT fault detection in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle based on the LBT fault detection configuration. The user equipment also includes a component for sending an LBT fault detection report based on the LBT fault detection.

[0139] The UE may also include one or more of the following features. For example, the UE includes: wherein the component for receiving the LBT fault detection configuration is also configured to receive the LBT fault detection configuration including an indicator, which indicates whether the UE is to perform LBT fault detection when operating in sleep mode or during the inactive DRX configuration on duration. The component for receiving the LBT fault detection configuration is also configured to receive an LBT fault detection configuration indicating at least one of an uplink LBT fault detection opportunity set or a downlink LBT fault detection opportunity set. The component for performing LBT fault detection is also configured to perform at least one of an uplink LBT fault detection during an opportunity in the uplink LBT fault detection opportunity set or a downlink LBT fault detection during an opportunity in the downlink LBT fault detection opportunity set when operating in the sleep mode of the first cell. The first cell is a secondary cell of the wireless communication network. The component for sending the LBT fault detection report is also configured to send the LBT fault detection report to the network via a second cell of the network, and the second cell is different from the first cell. The means for performing LBT fault detection is further configured to perform at least one of uplink LBT fault detection during an opportunity in an uplink LBT fault detection opportunity set within an inactive DRX configuration on duration or downlink LBT fault detection during an opportunity in a downlink LBT fault detection opportunity set within an inactive DRX configuration on duration. The UE may include means for monitoring a wake-up signal (WUS) within a first configured on duration in a DRX cycle; and means for determining that no WUS is detected within the first configured on duration, based on which the first configured on duration corresponds to the inactive DRX configuration on duration. The means for receiving an LBT fault detection configuration is further configured to receive an LBT fault detection configuration indicating an uplink LBT fault detection opportunity set, wherein the opportunities in the uplink fault detection opportunity set are associated with a virtual uplink allocation. The UE may include means for suppressing the performance of uplink transmissions based on the virtual uplink allocation. The means for performing LBT fault detection is further configured to perform LBT during opportunities in the uplink fault detection opportunity set based on the virtual uplink allocation. The component for sending the LBT fault detection report is also configured to send the LBT fault detection report based on the LBT associated with the virtual uplink allocation. The component for receiving the LBT fault detection configuration is also configured to receive a first configuration indicating an uplink LBT fault detection opportunity set; and receive a second configuration indicating a downlink LBT fault detection opportunity set. The component for receiving the LBT fault detection configuration is also configured to receive an LBT fault detection configuration indicating an uplink LBT fault detection opportunity set and a downlink LBT fault detection opportunity set.The component for sending the LBT fault detection report is also configured to send the LBT fault detection report based on the LBT associated with the virtual uplink allocation and the monitoring associated with the preconfigured downlink allocation. The component for receiving the LBT fault detection configuration is also configured to receive an LBT fault detection configuration indicating a downlink LBT fault detection opportunity set, wherein the opportunity in the downlink fault detection opportunity set is associated with the preconfigured downlink allocation. The preconfigured downlink allocation is associated with at least one of a synchronization signal block (SSB) or a reference signal. The component for performing LBT fault detection is also configured to monitor the downlink preconfigured signal based on the preconfigured downlink allocation during the opportunity in the downlink fault detection opportunity set. The component for sending the LBT fault detection report is also configured to send the LBT fault detection report based on the monitoring. The component for receiving the LBT fault detection configuration is also configured to receive a configuration including a signal measurement configuration and an LBT fault detection configuration, and the signal measurement configuration is associated with at least one of a beam measurement or a channel state information (CSI) measurement. The UE may include a component for determining at least one of a received signal strength indicator (RSSI) measurement and a channel occupancy measurement in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration as an on duration; and a component for sending a measurement report including at least one of the RSSI measurement or the channel occupancy measurement. The component for determining at least one of the RSSI measurement or the channel occupancy measurement is also configured to determine at least one of the RSSI measurement or the channel occupancy measurement in the first cell when operating in the sleep mode of the first cell; and the component for sending the measurement report is also configured to send the measurement report to the network via a second cell of the wireless communication network, the second cell being different from the first cell. The UE may include a component for receiving a request for a measurement report; and a component for receiving, in response to the measurement report, an instruction to switch the first cell from the sleep mode to the non-sleep mode. The component for receiving the LBT fault detection configuration is also configured to receive an LBT fault detection configuration including a periodic measurement configuration associated with at least one of the RSSI measurement or the channel occupancy measurement.

[0140] Other embodiments of the present disclosure include a base station (BS). The base station includes a component for sending a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network to a user equipment (UE); and a component for receiving an LBT fault detection report from the UE based on the LBT fault detection configuration, the fault detection report indicating the LBT fault detection performed by the UE in the first cell when the UE is operating in the sleep mode of the first cell or during an inactive DRX configuration on duration of the DRX cycle.

[0141] The BS may also include one or more of the following features. For example, the BS includes: wherein the component for sending the LBT fault detection configuration is also configured to send an LBT fault detection configuration including an indicator, which indicates whether the UE is to perform LBT fault detection when operating in sleep mode or during the inactive DRX configuration on duration. The component for sending the LBT fault detection configuration is also configured to send an LBT fault detection configuration indicating at least one of an uplink LBT fault detection opportunity set or a downlink LBT fault detection opportunity set. The LBT fault detection is associated with at least one of the opportunities in the uplink LBT fault detection opportunity set or the opportunities in the downlink LBT fault detection opportunity set. The first cell is a secondary cell of the network. The component for receiving the LBT fault detection report is also configured to receive the LBT fault detection report from the UE via a second cell of the wireless communication network, the second cell being different from the first cell. At least one of the opportunities in the uplink LBT fault detection opportunity set or the opportunities in the downlink LBT fault detection opportunity set is within the inactive DRX configuration on duration. The component for sending the LBT fault detection configuration is also configured to send an LBT fault detection configuration indicating an uplink LBT fault detection opportunity set, wherein the opportunities in the uplink LBT fault detection opportunity set are associated with a virtual uplink allocation. The component for sending the LBT fault detection configuration is also configured to send an LBT fault detection configuration indicating a downlink LBT fault detection opportunity set, wherein the opportunities in the downlink LBT fault detection opportunity set are associated with a preconfigured downlink allocation. The component for sending the LBT fault detection configuration is also configured to send a configuration including a signal measurement configuration and the LBT fault detection configuration, the signal measurement configuration being associated with at least one of a beam measurement or a channel state information (CSI) measurement. The BS may include a component for receiving a measurement report from the UE, the measurement report including at least one of a received signal strength indicator (RSSI) measurement or a channel occupancy measurement of a first cell measured when the UE is operating in a sleep mode of the first cell or during an inactive DRX configuration on-duration.

[0142] Information and signals may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0143] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration).

[0144] The functions described herein can be implemented in hardware, software run by a processor, firmware, or any combination thereof. If implemented in software run by a processor, these functions can be stored and sent as one or more instructions or codes on a computer-readable medium. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the above functions can be implemented using software run by a processor, hardware, firmware, hard wiring, or any combination of these. The features that implement the functions can also be physically located in various locations, including being distributed so that some functions are implemented in different physical locations. In addition, as used herein, including in the claims, the "or" used in the list of items (e.g., a list of items starting with a phrase such as "at least one" or "one or more") indicates a list of inclusions, so that, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0145] As will now be understood by those skilled in the art, and depending on the particular application at hand, many modifications, substitutions and changes may be made to the materials, devices, configurations and methods of use of the apparatus of the present disclosure without departing from the spirit and scope of the present disclosure. In view of this, the scope of the present disclosure should not be limited to the specific aspects shown and described herein, as they are only some examples thereof, but rather the scope should be fully commensurate with the appended claims and their functional equivalents.

Claims

1. A wireless communication method performed by a user equipment UE, include: Receiving, from a base station, a listen-before-talk LBT fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network, wherein receiving the LBT fault detection configuration comprises: receiving an LBT fault detection configuration indicating at least one of a set of uplink LBT fault detection opportunities or a set of downlink LBT fault detection opportunities; performing LBT failure detection in the first cell when operating in a dormant mode of the first cell or during an inactive DRX configuration on-duration of a DRX cycle based on the LBT failure detection configuration; and An LBT fault detection report is sent to the base station based on the LBT fault detection.

2. The method according to claim 1, in, The receive LBT fault detection configuration includes: An LBT failure detection configuration is received including an indicator indicating whether the UE performs LBT failure detection when operating in a sleep mode or when operating during an inactive DRX configuration on-duration.

3. The method according to claim 1, in: Performing LBT fault detection includes: Do at least one of the following: an uplink LBT failure detection during an occasion in a set of uplink LBT failure detection occasions within the Inactive DRX Configuration On Duration; or downlink LBT failure detection during an opportunity in a set of downlink LBT failure detection opportunities within the inactive DRX configuration on duration; and The method further includes: monitoring a wake-up signal WUS during a first configured on-duration of the DRX cycle; and It is determined that no WUS is detected during a first configured on-duration, based on which the first configured on-duration corresponds to an inactive DRX configured on-duration.

4. The method according to claim 1, in: Receiving the LBT fault detection configuration includes: receiving an LBT failure detection configuration indicating a set of uplink LBT failure detection opportunities, wherein opportunities in the set of uplink failure detection opportunities are associated with a virtual uplink allocation; The method further includes: refraining from performing uplink transmissions based on the virtual uplink assignment; Performing LBT fault detection includes: performing LBT during opportunities in the set of uplink failure detection opportunities based on the virtual uplink allocation; and Sending LBT fault detection report includes: An LBT failure detection report is sent based on the LBT associated with the virtual uplink assignment.

5. The method according to claim 1, in: The receive LBT fault detection configuration also includes: Receiving an LBT fault detection configuration indicating a set of downlink LBT fault detection opportunities, wherein opportunities in the set of downlink fault detection opportunities are associated with a preconfigured downlink allocation; performing LBT fault detection comprises: monitoring a downlink preconfigured signal based on a preconfigured downlink allocation during an opportunity in the set of downlink failure detection opportunities; and Sending LBT fault detection report includes: Based on the monitoring, the LBT fault detection report is sent.

6. The method according to claim 1, in, The receive LBT fault detection configuration also includes: receiving a first configuration indicating a set of uplink LBT failure detection opportunities; and A second configuration is received indicating a set of downlink LBT failure detection opportunities.

7. The method according to claim 1, in, The receive LBT fault detection configuration also includes: An LBT failure detection configuration is received indicating a set of uplink LBT failure detection opportunities and a set of downlink LBT failure detection opportunities.

8. The method according to claim 1, in, The receive LBT fault detection configuration also includes: A configuration including a signal measurement configuration and an LBT failure detection configuration is received, wherein the signal measurement configuration is associated with at least one of a beam measurement or a channel state information (CSI) measurement.

9. The method according to claim 1, further comprising: include: while operating in a dormant mode of the first cell or during an inactive DRX configuration on duration, determining at least one of a received signal strength indicator, RSSI, measurement or a channel occupancy measurement in the first cell; as well as A measurement report is sent including at least one of the RSSI measurement or the channel occupancy measurement.

10. The method according to claim 9, in: Determining at least one of an RSSI measurement or a channel occupancy measurement includes: while operating in a sleep mode of the first cell, determining at least one of the RSSI measurement or the channel occupancy measurement in the first cell; and The method further includes: receiving a request for a measurement report; and In response to the measurement report, an instruction to switch the first cell from a sleep mode to a non-sleep mode is received.

11. The method according to claim 9, in, The receive LBT fault detection configuration includes: An LBT fault detection configuration is received that includes a periodic measurement configuration associated with at least one of an RSSI measurement or a channel occupancy measurement.

12. A user equipment UE, include: The transceiver is configured to receive, from a base station, a listen-before-talk LBT fault detection configuration associated with at least one of a sleep mode or a discontinuous reception DRX cycle in a first cell of a wireless communication network, wherein receiving the LBT fault detection configuration comprises: receiving an LBT fault detection configuration indicating at least one of a set of uplink LBT fault detection opportunities or a set of downlink LBT fault detection opportunities; a processor configured to, based on the LBT failure detection configuration, perform LBT failure detection in the first cell when operating in a sleep mode of the first cell or during an inactive DRX configuration on duration of a DRX cycle; and The transceiver is further configured to send an LBT fault detection report to the base station based on the LBT fault detection.

13. The user equipment according to claim 12, in: The LBT failure detection configuration indicates a set of uplink LBT failure detection opportunities, wherein opportunities in the set of uplink failure detection opportunities are associated with a virtual uplink allocation; The transceiver is further configured to refrain from performing uplink transmissions based on the virtual uplink assignment; The processor configured to perform LBT fault detection is further configured to: performing LBT during opportunities in the set of uplink failure detection opportunities based on the virtual uplink allocation; and The LBT failure detection report is based on the LBT associated with the virtual uplink assignment.

14. The user equipment according to claim 12, in: The LBT failure detection configuration indicates a set of downlink LBT failure detection opportunities, wherein opportunities in the set of downlink failure detection opportunities are associated with preconfigured downlink allocations; The processor configured to perform LBT fault detection is configured to: monitoring a downlink preconfigured signal based on a preconfigured downlink allocation during an opportunity in the set of downlink failure detection opportunities; and LBT fault detection reporting is based on the monitoring.

15. The user equipment according to claim 12, in, The transceiver configured to receive the LBT fault detection configuration is configured to: receiving a first configuration indicating a set of uplink LBT failure detection opportunities; as well as A second configuration is received indicating a set of downlink LBT failure detection opportunities.

16. The user equipment according to claim 12, in, The transceiver configured to receive the LBT fault detection configuration is configured to: An LBT failure detection configuration is received indicating a set of uplink LBT failure detection opportunities and a set of downlink LBT failure detection opportunities.

17. The user equipment according to claim 12, in, The transceiver configured to receive the LBT fault detection configuration is configured to: A configuration including a signal measurement configuration and an LBT failure detection configuration is received, wherein the signal measurement configuration is associated with at least one of a beam measurement or a channel state information (CSI) measurement.

18. The user equipment according to claim 12, in: The processor is further configured to, while operating in a sleep mode of the first cell or while operating during an inactive DRX configuration on-duration, determine at least one of a received signal strength indicator, RSSI, measurement or a channel occupancy measurement in the first cell; and The transceiver is further configured to send a measurement report comprising at least one of an RSSI measurement or a channel occupancy measurement.

19. The user equipment according to claim 18, in: The processor configured to determine at least one of an RSSI measurement or a channel occupancy measurement is configured to: while operating in a sleep mode of the first cell, determining at least one of the RSSI measurement or the channel occupancy measurement in the first cell; and The transceiver is also configured to: receiving a request for a measurement report; and In response to the measurement report, an instruction to switch the first cell from a sleep mode to a non-sleep mode is received.

20. The user equipment according to claim 18, in, The transceiver configured to receive the LBT fault detection configuration is configured to: An LBT fault detection configuration is received that includes a periodic measurement configuration associated with at least one of an RSSI measurement or a channel occupancy measurement.

21. A non-transitory computer readable medium having program code recorded thereon, the program code include: Code, configured to cause a UE to receive, from a base station, a listen-before-talk (LBT) fault detection configuration associated with at least one of a sleep mode or a discontinuous reception (DRX) cycle in a first cell of a wireless communication network, wherein receiving the LBT fault detection configuration comprises: receiving an LBT fault detection configuration indicating at least one of a set of uplink LBT fault detection opportunities or a set of downlink LBT fault detection opportunities; Code for causing the UE to perform LBT failure detection in the first cell based on the LBT failure detection configuration when operating in a dormant mode of the first cell or during an inactive DRX configuration on duration of a DRX cycle; and Code, used to enable the UE to send an LBT fault detection report to the base station based on the LBT fault detection.

22. The non-transitory computer readable medium of claim 21, in: The LBT failure detection configuration indicates a set of uplink LBT failure detection opportunities, wherein opportunities in the set of uplink failure detection opportunities are associated with a virtual uplink allocation; The program code also includes: code for causing a UE to refrain from performing uplink transmission based on the virtual uplink assignment; The code for causing the UE to perform LBT failure detection is also configured to: performing LBT during opportunities in the set of uplink failure detection opportunities based on the virtual uplink allocation; and The LBT failure detection report is based on the LBT associated with the virtual uplink assignment.

23. The non-transitory computer readable medium of claim 21, in: The LBT failure detection configuration indicates a set of downlink LBT failure detection opportunities, wherein opportunities in the set of downlink failure detection opportunities are associated with preconfigured downlink allocations; The code for causing the UE to perform LBT failure detection is also configured to: monitoring a downlink preconfigured signal based on a preconfigured downlink allocation during an opportunity in the set of downlink failure detection opportunities; and LBT fault detection reporting is based on the monitoring.

24. The non-transitory computer readable medium of claim 21, in, The code for causing the UE to receive the LBT failure detection configuration is also configured to: A configuration including a signal measurement configuration and an LBT failure detection configuration is received, wherein the signal measurement configuration is associated with at least one of a beam measurement or a channel state information (CSI) measurement.

25. The non-transitory computer readable medium of claim 21, further comprising: include: code for causing the UE to determine at least one of a received signal strength indicator, RSSI, measurement or a channel occupancy measurement in the first cell when operating in a dormant mode of the first cell or when operating during an inactive DRX configuration on duration; as well as Code for causing a UE to send a measurement report including at least one of an RSSI measurement or a channel occupancy measurement.

26. The non-transitory computer readable medium of claim 25, in: The code for causing the UE to determine at least one of an RSSI measurement or a channel occupancy measurement is configured to: while operating in a sleep mode of the first cell, determining at least one of an RSSI measurement or a channel occupancy measurement in the first cell; and The program code also includes: Code for causing a UE to receive a request for a measurement report; as well as The code is used to enable the UE to receive an instruction to switch the first cell from a sleep mode to a non-sleep mode in response to the measurement report.

27. The non-transitory computer readable medium of claim 25, in, The code for causing the UE to receive the LBT failure detection configuration is configured to: An LBT fault detection configuration is received that includes a periodic measurement configuration associated with at least one of an RSSI measurement or a channel occupancy measurement.

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