Control channel decoding configuration for cross-carrier scheduling

Abstract

Mechanisms are provided for cross-carrier scheduling from a first cell to a second cell in a wireless networking scheme. In one aspect, a method includes receiving, from a base station (BS), a first configuration for scheduling in a first cell having a first subcarrier spacing (SCS), where the first configuration is associated with a first search space in the first cell. The method also includes receiving, from the BS, a second configuration for scheduling in the first cell, where the second configuration is associated with a second search space in a second cell, and where the second cell is associated with a different second SCS. The method further includes determining a number of blind detections (BDs) based on at least one of the first SCS or the second SCS, and monitoring, based on the number of BDs, a downlink control information (DCI) in the first search space and the second search space.

Description

[0001] This application is a divisional application of the application filed on September 24, 2021, with application number 202180065959.1 and entitled "Control Channel Decoding Configuration for Cross-Carrier Scheduling". Cross-reference to related applications

[0002] This application claims the benefits and priority of U.S. Patent Application No. 17 / 448,702, filed September 23, 2021, and U.S. Provisional Patent Application No. 63 / 086,515, filed October 1, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] In general, this application relates to wireless communication systems, and more specifically, to downlink control information (DCI) monitoring and decoding configuration for cross-carrier scheduling in carrier aggregation systems. Background Technology

[0004] Wireless communication systems have been widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, and so on. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Wireless multiple access communication systems may include multiple base stations (BSs), each BS simultaneously supporting communication from multiple communication devices, which may otherwise be referred to as user equipment (UEs).

[0005] To meet the growing demand for extended mobile broadband connectivity, wireless communication technologies are evolving from Long Term Evolution (LTE) to Next Generation New Radio (NR) technologies, often referred to as fifth generation (5G). NR is designed to offer lower latency, higher bandwidth or throughput, and greater reliability than LTE. It is designed to operate across a wide range of frequency bands, from low-frequency bands below approximately 1 GHz, to mid-frequency bands from approximately 1 GHz to approximately 6 GHz, and to high-frequency bands such as millimeter wave (mmWave). NR is also designed to operate on different spectrum types, from licensed spectrum to unlicensed and shared spectrum. Spectrum sharing allows operators to opportunistically aggregate spectrum to dynamically support high-bandwidth services. Spectrum sharing can extend the advantages of NR technology to operating entities that may not have access to licensed spectrum.

[0006] Carrier aggregation (CA) is a capability, for example, in LTE and 5G NR, that combines two or more frequency bands or component carriers (CCs) to increase bandwidth. In some aspects, one CC can be used as an anchor carrier or primary cell (Pcell), and another CC can be used as a supplementary carrier or secondary cell (Scell). An Scell ​​can include uplink (UL) component carriers and downlink (DL) component carriers. Alternatively, an Scell ​​can include only DL component carriers. In CA communication scenarios, cross-carrier scheduling can be used, whereby the UE monitors downlink communication information (DCI) on one cell (e.g., Pcell) (e.g., downlink (DL) scheduling permission) and receives downlink data on another cell (e.g., Scell) (e.g., in the Physical Downlink Shared Channel (PDSCH)). Alternatively or additionally, the UE can monitor DCI on one cell (e.g., uplink (UL) scheduling permission) and transmit UL data in another cell (e.g., in the Physical Uplink Shared Channel (PUSCH)). Summary of the Invention

[0007] To provide a basic understanding of the techniques discussed, some aspects of this disclosure are summarized below. This summary is not an exhaustive overview of all anticipated features of this disclosure, nor is it intended to identify key or essential elements of all aspects of this disclosure, or to describe the scope of any or all aspects of this disclosure. Its sole purpose is to present some concepts of one or more aspects of this disclosure in a generalized form as a prelude to the detailed description that follows.

[0008] According to one aspect of this disclosure, a method of wireless communication performed by a user equipment (UE) includes: receiving from a base station (BS) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); receiving from the BS a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; determining a blind detection (BD) quantity based on at least one of the first SCS or the second SCS; and monitoring downlink control information (DCI) in the first search space and the second search space based on the BD quantity.

[0009] According to another aspect of this disclosure, a method of wireless communication performed by a base station (BS) includes: sending to a user equipment (UE) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); sending to the UE a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; sending to the UE a third configuration indicating a third SCS associated with a number of downlink control information (DCI) blind detection (BD) in the first and second search spaces, wherein the third SCS corresponds to one of the first SCS or the second SCS; and sending DCI to the UE in at least one of the first or second search spaces based on the number of DCI BDs.

[0010] According to another aspect of this disclosure, a UE includes a transceiver configured to: receive from a base station (BS) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); and receive from the BS a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS. The UE also includes a processor configured to: determine a blind detection (BD) quantity based on at least one of the first SCS or the second SCS; and monitor downlink control information (DCI) in the first and second search spaces based on the BD quantity.

[0011] According to another aspect of this disclosure, a BS includes a transceiver configured to: transmit to a user equipment (UE) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); transmit to the UE a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; transmit to the UE a third configuration indicating a third SCS associated with a number of downlink control information (DCI) blind detection (BD) in the first and second search spaces, wherein the third SCS corresponds to one of the first SCS or the second SCS; and transmit the DCI to the UE in at least one of the first or second search spaces based on the number of DCI BDs.

[0012] According to another aspect of this disclosure, a non-transitory computer-readable medium records program code comprising: code for causing a user equipment (UE) to receive from a base station (BS) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); code for causing the UE to receive from the BS a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; code for causing the UE to determine a blind detection (BD) quantity based on at least one of the first SCS or the second SCS; and code for monitoring downlink control information (DCI) in the first and second search spaces based on the BD quantity.

[0013] According to another aspect of this disclosure, a non-transitory computer-readable medium records program code comprising: code for causing a base station (BS) to send to a user equipment (UE) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); code for causing the BS to send to the UE a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; code for causing the BS to send to the UE a third configuration indicating a third SCS associated with a number of downlink control information (DCI) blind detection (BD) in the first and second search spaces, wherein the third SCS corresponds to one of the first SCS or the second SCS; and code for causing the BS to send DCI to the UE in at least one of the first or second search spaces based on the DCI BD number.

[0014] According to another aspect of this disclosure, a UE includes: a unit for receiving from a base station (BS) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); a unit for receiving from the BS a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; a unit for determining a blind detection (BD) quantity based on at least one of the first SCS or the second SCS; and a unit for monitoring downlink control information (DCI) in the first search space and the second search space based on the BD quantity.

[0015] According to another aspect of this disclosure, a BS includes: a unit for transmitting to a user equipment (UE) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); a unit for transmitting to the UE a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; a unit for transmitting to the UE a third configuration indicating a third SCS associated with a number of downlink control information (DCI) blind detection (BD) in the first and second search spaces, wherein the third SCS corresponds to one of the first SCS or the second SCS; and a unit for transmitting DCI to the UE in at least one of the first or second search spaces based on the number of DCI BDs.

[0016] Other aspects, features, and embodiments of the invention will become apparent to those skilled in the art after reading the following description of specific, exemplary embodiments of the present disclosure in conjunction with the accompanying drawings. While features of the invention are discussed with respect to certain embodiments and the drawings below, all embodiments of the invention may include one or more of the advantageous features discussed herein. In other words, while one or more embodiments are discussed as having certain advantageous features, one or more of these features may also be used according to the various embodiments of the invention discussed herein. Similarly, while exemplary embodiments are discussed below as embodiments of devices, systems, or methods, it should be understood that these exemplary embodiments can be implemented with a wide variety of devices, systems, and methods. Attached Figure Description

[0017] Figure 1 A wireless communication network according to some aspects of this disclosure is shown.

[0018] Figure 2 The structure of a radio frame according to some aspects of this disclosure is shown.

[0019] Figure 3 A blind detection scheme for the Common Control Resource Set (CORESET) based on some aspects of this disclosure is shown.

[0020] Figure 4 A cross-carrier scheduling scheme based on some aspects of this disclosure is shown.

[0021] Figure 5A This is a timing diagram illustrating a control channel monitoring scheme according to some aspects of this disclosure.

[0022] Figure 5B Based on some aspects of this disclosure, radio resource control (RRC) information elements indicating search space configuration are shown.

[0023] Figure 6 A cross-carrier scheduling scheme based on some aspects of this disclosure is shown.

[0024] Figure 7 A cross-carrier scheduling scheme based on some aspects of this disclosure is shown.

[0025] Figure 8A A cross-carrier scheduling scheme based on some aspects of this disclosure is shown.

[0026] Figure 8B A cross-carrier scheduling scheme based on some aspects of this disclosure is shown.

[0027] Figure 9 A control channel information monitoring scheme based on some aspects of this disclosure is shown.

[0028] Figure 10 A control channel information monitoring scheme based on some aspects of this disclosure is shown.

[0029] Figure 11 This is a block diagram of an exemplary base station (BS) based on some aspects of this disclosure.

[0030] Figure 12 This is a block diagram of an exemplary user equipment (UE) based on some aspects of this disclosure.

[0031] Figure 13 This is a signaling diagram illustrating a cross-carrier scheduling method according to some aspects of this disclosure.

[0032] Figure 14 This is a flowchart of a wireless communication method based on some aspects of this disclosure.

[0033] Figure 15 This is a flowchart of a wireless communication method based on some aspects of this disclosure. Detailed Implementation

[0034] The specific embodiments described below with reference to the accompanying drawings are intended merely to describe various configurations and not to indicate that the concepts described herein can be implemented only in these configurations. To provide a thorough understanding of the various concepts, the specific embodiments include certain details. However, it will be apparent to those skilled in the art that these concepts can be implemented without using these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0035] This disclosure generally relates to wireless communication systems, also known as wireless communication networks. In various embodiments, these technologies and apparatuses 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, Global System for Mobile Communications (GSM) networks, 5G or New Radio (NR) networks, and other communication networks. As used herein, the terms "network" and "system" may be used interchangeably.

[0036] OFDMA networks can implement radio technologies such as evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, Flash-OFDMA, and others. UTRA, E-UTRA, and GSM are part of the Universal Mobile Telecommunications System (UMTS). Specifically, Long Term Evolution (LTE) is a release of UMTS that adopts E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents from an organization called the 3rd Generation Partnership Project (3GPP), while CDMA2000 is described in documents from an organization called 3rd Generation Partnership Project 2 (3GPP2). These various radio technologies and standards are either known or under development. For example, the 3rd Generation Partnership Project (3GPP) is a collaboration between a group of telecommunications associations that aims to define globally applicable third-generation (3G) mobile phone specifications. 3GPP Long Term Evolution (LTE) is a 3GPP project aimed at improving the UMTS mobile phone standard. 3GPP can define specifications for next-generation mobile networks, mobile systems, and mobile devices. This disclosure focuses on the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond, which use new and different sets of radio access technologies or radio air interfaces to share access to the radio spectrum between networks.

[0037] Specifically, 5G networks envision a variety of deployments, spectrums, 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 extend to provide coverage with the following characteristics: (1) providing ultra-high density (e.g., ~1M nodes / km) for massive Internet of Things (IoT). 2 (1) Ultra-low complexity (e.g., ~10 s bits / second), ultra-low power consumption (e.g., battery life of ~10 years or more), and deep coverage capable of reaching challenging locations; (2) Providing robust security for mission-critical controls to protect sensitive personal, financial, or confidential information, ultra-high reliability (e.g., ~99.9999% reliability), ultra-low latency (e.g., ~1 ms), and providing these features to users with a wide range of mobility or lack thereof; (3) Providing enhanced mobile broadband, including ultra-high capacity (e.g., ~10 Tbps / km). 2 ), ultra-high data rates (e.g., multi-Gbps rates, 100+ Mbps user experience rates), and deep awareness with improved discovery and optimization.

[0038] 5G NR communication systems can be implemented using optimized OFDM-based waveforms, featuring scalable digital schemes and transmission time intervals (TTI). Additional features may include: a general, flexible framework for efficiently multiplexing services and functions using dynamic, low-latency Time Division Duplex (TDD) / Frequency Division Duplex (FDD) designs; and advanced wireless technologies such as massive MIMO, robust millimeter-wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of the digital scheme in 5G NR features extended subcarrier spacing, which efficiently addresses the operation of various services across different spectrums and deployments. For example, in various outdoor and macro coverage deployments of FDD / TDD implementations below 3 GHz, subcarrier spacing can occur at 15 kHz over bandwidths (BWs) such as 5, 10, 20 MHz, etc. For various other outdoor and small cell coverage TDD deployments above 3 GHz, subcarrier spacing can occur at 30 kHz over an 80 / 100 MHz BW. For various other indoor broadband implementations using TDD on the unlicensed portion of the 5 GHz band, subcarrier spacing can occur at 60 kHz over a 160 MHz BW. Finally, for various deployments using mmWave components for TDD transmission at 28 GHz, subcarrier spacing can occur at 120 kHz over a 500 MHz BW.

[0039] 5G NR's scalable digital schemes facilitate scalable TTIs to meet diverse 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 begin from symbol boundaries. 5G NR also envisions a self-contained synthetic subframe design that incorporates UL / downlink scheduling information, data, and acknowledgments within the same subframe. This self-contained synthetic subframe supports unlicensed or contention-based shared spectrum and adaptive UL / downlink communication, which can be flexibly configured on a per-cell basis to dynamically switch between UL and downlink to meet current service demands.

[0040] Various other aspects and features of this disclosure are further described below. It will be apparent that the teachings herein can be embodied in many forms, and any particular structure, function, or both disclosed herein are merely representative and not limiting. Based on the teachings herein, any person skilled in the art will understand that the aspects disclosed herein can be implemented independently of any other aspects and can be combined in various ways with two or more of these aspects. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. Furthermore, such an apparatus or method can be implemented or practiced using other structures, functions, or structures and functions other than or different from one or more aspects set forth herein. For example, a method can be implemented as part of a system, device, apparatus, and / or as instructions stored on a computer-readable medium for execution on a processor or computer. In addition, an aspect may include at least one element of the claims.

[0041] In a wireless communication network, the BS can schedule the UE to perform UL and / or DL ​​communication by sending UL scheduling grants and / or DL ​​scheduling grants to the UE, respectively. UL and / or DL ​​scheduling grants can take the form of downlink control information (DCI). The BS can configure a search space (time-frequency resource area) for the UE, in which the BS can send UL and / or DL ​​scheduling grants. Therefore, the UE can monitor the search space in response to UL and / or DL ​​scheduling grants from the BS. In some aspects, the BS can use various resource combinations in the search space (e.g., including control channel element (CCE) arrangements and / or aggregation levels (AL)) to send DCI in the search space, and the UE can detect DCI by performing blind decoding in the search space based on these resource configurations. For example, the number of blind decodings the UE can perform in the search space can correspond to the number of potential combinations that the BS can use to send DCI in the search space. In some examples, the search space can be repeated temporally according to a certain periodicity. The BS can configure the UE using monitoring configurations, such as DCI monitoring timings corresponding to the time location in the search space, monitoring periods corresponding to the search space period, and / or the number of blind decodings corresponding to the number of potential combinations of resources.

[0042] To transmit data at higher rates, the UE and BS can communicate in parallel across multiple frequency bands (a form of carrier aggregation (CA)). In this configuration, one of these frequency bands can be associated with a primary cell (Pcell), and another with a secondary cell (Scell). One or more of the Pcells or Scells can be used as scheduling cells, in which the BS can transmit control channel information indicating scheduling permission or resource allocation (location of DL / UL data resources) in another cell (called the scheduled cell). In one example, the UE can monitor the DCI on the scheduling cell, where the DCI indicates that downlink data will be scheduled or transmitted on the scheduled cell (e.g., transmitted in the PDSCH). This can be referred to as "cross-carrier scheduling." Furthermore, the UE can also monitor the DCI on the scheduling cell for self-scheduling DL data on the scheduling cell.

[0043] As used herein, the term “cross-carrier scheduling” can refer to a BS transmitting a scheduling grant (DCI) in one cell for scheduling in another cell. As used herein, the term “self-scheduling” can refer to a BS transmitting a scheduling grant (DCI) in a cell for scheduling within the same cell. As used herein, the term “scheduling cell” can refer to a cell in which scheduling is transmitted. As used herein, the term “scheduled cell” can refer to a cell in which UL and DL communications are being scheduled. As used herein, the terms “search space” and “search space set” refer to a set of DCI candidates or physical downlink control channel (PDCCH) candidates in which a UE can monitor scheduling grants (e.g., DCIs). As used herein, the term “number of blind decodings (BDs)” refers to the number of PDCCH candidates that a UE can monitor in the search space, and the “number of blind decodings (BDs)” can be associated with the number of non-overlapping control channel elements (CCEs) in the search space.

[0044] In 5G NR, scheduling cells and scheduled cells can be associated with different subcarrier spacings (SCS). For example, if the Scell ​​is the scheduling cell, the scheduling cell / Scell ​​can have an SCS of 30 kHz, and the scheduled cell / Pcell can have an SCS of 15 kHz. The monitoring configuration used by the UE to identify DCI (e.g., monitoring timing periodicity, number of blind decodings) can be based on the scheduling cell's SCS. When the CA system utilizes cross-carrier scheduling with a single scheduling cell, the search space and / or DCI monitoring can be configured based on the scheduling cell's SCS. For example, a Pcell in the CS system can be a scheduling cell that provides scheduling for that Pcell and one or more Scells in the CA system.

[0045] In some cases, it may be necessary to offload some scheduling operations to the Scell ​​to alleviate the traffic load in the Pcell. However, the Pcell is typically used as the anchor cell for transmitting system information. Therefore, the Pcell can also transmit scheduling information for communication within the Pcell. In other words, communication in the Pcell (the scheduled cell) can be based on scheduling transmitted in the Pcell and / or Scell. Therefore, the UE can monitor the DCI in both the Pcell and Scell ​​to obtain the scheduling for communication within the Pcell. As mentioned above, the number of BDs performed by the UE in DCI monitoring (the number of PDCCH candidates monitored by the UE) can depend on the SCS of the scheduling cell. However, since DL / UL transmissions on a cell may be scheduled by two or more different cells associated with two or more different SCSs, the UE may not know which SCS to use to determine the number of BDs to monitor in the scheduling cell. Therefore, if the BS sends a DCI that allows successful decoding using the number of BDs associated with the SCS of the first scheduling cell instead of the number of BDs associated with the SCS of the second scheduling cell, the UE may not be able to decode the DCI without exceeding certain BD and / or CCE budgets (which are, for example, associated with the UE's capabilities).

[0046] Various aspects of this disclosure provide mechanisms for monitoring control channel information (e.g., DCI) by performing multiple BDs, wherein the number of BDs is determined based on the SCS associated with at least one scheduling cell. For example, the UE can be configured to determine the number of BDs based on a lower or higher SCS of the scheduling cell's SCS. In another aspect, the UE is configured to determine the number of BDs based on an SCS explicitly configured in RRC signaling. By configuring the UE to determine the number of BDs based on a selected SCS among the scheduling cell's SCSs, the UE can monitor DCIs on scheduling cells with different SCSs and ensure that DCIs can be successfully decoded or detected within the determined BD and / or CCE limits.

[0047] Figure 1 A wireless communication network 100 according to some aspects of this disclosure is illustrated. Network 100 may be a 5G network. Network 100 includes multiple base stations (BSs) 105 (labeled 105a, 105b, 105c, 105d, 105e, and 105f, respectively) and other network entities. BS 105 may be a station communicating with UE 115, and may also be referred to as an evolved Node B (eNB), a next-generation eNB (gNB), an access point, etc. Each BS 105 may provide communication coverage for a specific geographic area. In 3GPP, depending on the context in which the term "cell" is used, it may refer to a specific geographic coverage area of ​​BS 105 and / or a BS subsystem serving that coverage area.

[0048] BS 105 can provide communication coverage for macrocells or small cells (e.g., picocells or femtocells and / or other types of cells). Macrocells typically cover a relatively large geographic area (e.g., a radius of several kilometers), allowing unrestricted access for UEs with service subscriptions to a network provider. Small cells, such as picocells, typically cover a relatively small geographic area, allowing unrestricted access for UEs with service subscriptions to a network provider. Small cells, such as femtocells, typically also cover a small geographic area (e.g., a home), and in addition to unrestricted access, they can provide restricted access to UEs associated with that femtocell (e.g., UEs in a closed user group (CSG), UEs for users in a home, etc.). A BS used for macrocells can be called a macro BS. A BS used for small cells can be called a small cell BS, pico BS, femtocell BS, or home BS. Figure 1 In the examples shown, BS105d and 105e can be conventional macro BSs, while BS 105a-105c can be macro BSs with one of three-dimensional (3D), full-dimensional (FD), or massive MIMO capabilities. BS 105a-105c can utilize their higher-dimensional MIMO capabilities to increase coverage and capacity using 3D beamforming in elevation and azimuth beamforming. BS 105f can be a small cell BS, which can be a home node or a portable access point. BS 105 can support one or more (e.g., two, three, four, etc.) cells.

[0049] Network 100 can support synchronous or asynchronous operation. For synchronous operation, BSs can have similar frame timing, and transmissions from different BSs can be roughly aligned in time. For asynchronous operation, BSs can have different frame timing, and transmissions from different BSs may not be aligned in time.

[0050] UE 115 is distributed throughout the wireless network 100, and each UE 115 can be fixed or mobile. UE 115 can also be referred to as a terminal, mobile station, user unit, station, etc. UE 115 can be a cellular phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop computer, cordless phone, wireless local loop (WLL) station, etc. In one aspect, UE 115 can be a device including a Universal Integrated Circuit Card (UICC). In another aspect, UE can be a device without a UICC. In some aspects, UE 115 without a UICC can also be referred to as an IoT device or Internet of Things (IoE) device. UE 115a-115d are examples of mobile smartphone-type devices accessing network 100. UE 115 can also be a machine specifically configured for connecting communications, including Machine Type Communication (MTC), Enhanced MTC (eMTC), Narrowband IoT (NB-IoT), etc. UE 115e-115h are examples of various machines configured for accessing communications within network 100. UE 115i-115k is an example of a vehicle equipped with wireless communication equipment configured to communicate with access network 100. UE 115 is capable of communicating with any type of BS (whether macro BS, small cell, etc.). Figure 1 In the context of lightning (e.g., communication links), lightning indicates radio transmissions between UE 115 and serving BS 105 (which is a BS designated to serve UE 115 on the downlink (DL) and / or uplink (UL), desired transmissions between BSs, backhaul transmissions between BSs, or lateral link transmissions between UE 115.

[0051] In operation, BS 105a-105c can use 3D beamforming and cooperative spatial technologies such as Cooperative Multipoint (CoMP) or multi-connectivity to serve UE 115a and UE 115b. Macro BS 105d can perform backhaul communication with BS 105a-105c and small cell BS 105f. Macro BS 105d can also transmit multicast services subscribed to 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 (e.g., amber alerts or grey alerts).

[0052] BS 105 can also communicate with the core network. The core network can provide user authentication, access permission, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. At least some of the BS 105s (e.g., examples of gNBs or Access Node Controllers (ANCs)) can interface with the core network via a backhaul link (e.g., NG-C, NG-U, etc.) and can perform radio configuration and scheduling for communication with UE 115. In various examples, the BS 105s can communicate directly or indirectly (e.g., via the core network) with each other via a backhaul link (e.g., X1, X2, etc.), where the backhaul link can be a wired link or a wireless link.

[0053] Network 100 can also support mission-critical communications via highly reliable and redundant links for mission-critical devices such as UE115e (which could be a drone). Redundant communication links with UE 115e can include links from macro BS 105d and BS 105e, and links from small cell BS 105f. Other machine-type devices (e.g., UE 115f (e.g., a thermometer), UE 115g (e.g., a smart meter), and UE 115h (e.g., a wearable device)) can communicate directly with BSs (e.g., small cell BS 105f and macro BS 105e) via Network 100, or in a multi-step size configuration, via another user equipment that relays its information to the network (e.g., UE 115f transmits temperature measurement information to smart meter UE 115g, which then reports it to the network via small cell BS 105f). Network 100 can also provide additional network efficiency through dynamic, low-latency TDD / FDD communication (e.g., V2V, V2X, C-V2X between UE 115i, 115j or 115k and other UE 115), and / or vehicle-to-infrastructure (V2I) communication between UE 115i, 115j or 115k and BS 105).

[0054] In some implementations, network 100 utilizes OFDM-based waveforms for communication. OFDM-based systems can divide the system BW into multiple (K) orthogonal subcarriers, where subcarriers are also commonly referred to as subcarriers, tones, frequency points, etc. Each subcarrier can be modulated using data. In some instances, 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 instances, the subcarrier spacing and / or the duration of the time interval (TTI) can be scalable.

[0055] In some respects, BS 105 can allocate or schedule transmission resources (e.g., in the form of time-frequency resource blocks (RBs)) for downlink (DL) and uplink (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. This communication can take the form of radio frames. Radio frames can be divided into multiple subframes or time slots (e.g., approximately 10). Each time slot can be further divided into micro-time slots. In FDD mode, simultaneous UL and DL transmissions can occur in different frequency bands. For example, each subframe includes UL subframes in the UL band and DL subframes in the DL band. In TDD mode, UL and DL transmissions occur using the same frequency band but in different time periods. For example, a subset of the subframes in a radio frame (e.g., DL subframes) can be used for DL ​​transmissions, and another subset of the subframes in a radio frame (e.g., UL subframes) can be used for UL transmissions.

[0056] The DL and UL subframes can be further divided into several regions. For example, each DL or UL subframe can have a predefined region for transmitting reference signals, control information, and data. Reference signals are predetermined signals that facilitate communication between BS 105 and UE 115. For example, reference signals can have a specific pilot pattern or structure, where pilot tones can span an operating BW or frequency band, each located at a predefined time and a predefined frequency. For example, BS 105 can transmit cell-specific reference signals (CRS) and / or channel state information-reference signals (CSI-RS) to enable UE 115 to estimate the DL channel. Similarly, UE 115 can transmit sounding reference signals (SRS) to enable BS 105 to estimate the UL channel. Control information can include resource allocation and protocol control. Data can include protocol data and / or operational data. In some aspects, BS 105 and UE 115 can communicate using self-contained subframes. Self-contained subframes can include portions for DL ​​communication and portions for UL communication. Self-contained subframes can be DL-centric or UL-centric. A DL-centered subframe can include a DL communication duration that is longer than the UL communication duration. A UL-centered subframe can include a UL communication duration that is longer than the DL communication duration.

[0057] In some respects, network 100 may be an NR network deployed on licensed spectrum. BS 105 may transmit synchronization signals (e.g., including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)) within network 100 to facilitate synchronization. BS 105 may broadcast system information associated with network 100 (e.g., including a primary information block (MIB), residual system information (RMSI), and other system information (OSI)) to facilitate initial network access. In some instances, BS 105 may broadcast the PSS, SSS, and / or MIB in the form of a synchronization signal block (SSB) on the physical broadcast channel (PBCH), and may broadcast the RMSI and / or OSI on the physical downlink shared channel (PDSCH).

[0058] In some respects, UE 115 attempting to access network 100 can perform an initial cell search by detecting the PSS from BS 105. The PSS can provide periodically timed synchronization and can indicate a physical layer identification value. UE 115 can then receive the SSS. The SSS can provide radio frame synchronization and can provide a cell identification value, which can be combined with the physical layer identification value to identify the cell. The PSS and SSS can be located in the center portion of the carrier, or can be any suitable frequency within the carrier.

[0059] After receiving the PSS and SSS, UE 115 can receive the MIB. The MIB may include system information for initial network access and scheduling information for RMSI and / or OSI. After decoding the MIB, UE 115 can receive the RMSI and / or OSI. The RMSI and / or OSI may include radio resource control (RRC) information related to the Random Access Channel (RACH) procedure, paging, control resource set (CORESET) for monitoring the Physical Downlink Control Channel (PDCCH), Physical UL Control Channel (PUCCH), Physical UL Shared Channel (PUSCH), power control, and SRS.

[0060] After obtaining the MIB, RMSI, and / or OSI, UE 115 can perform a random access procedure to establish a connection with BS 105. In some examples, the random access procedure can be a four-step random access procedure. For example, UE 115 can send a random access preamble, and BS 105 can respond with a random access response. The random access response (RAR) may include a detected random access preamble identifier (ID) corresponding to the random access preamble, timing advance (TA) information, UL grant, temporary cell radio network temporary identifier (C-RNTI), and / or backoff indicator. Upon receiving the random access response, UE 115 can send a connection request to BS 105, and BS 105 can respond with a connection response. The connection response may indicate contention resolution. In some examples, the random access preamble, RAR, connection request, and connection response may be referred to as message 1 (MSG1), message 2 (MSG2), message 3 (MSG3), and message 4 (MSG4), respectively. In some cases, the random access procedure can be a two-step random access procedure, where UE 115 can send the random access preamble and connection request in a single transmission, while BS 105 can respond by sending the random access response and connection response in a single transmission.

[0061] After the connection is established, UE 115 and BS 105 can enter the normal operation phase, during which they can exchange operational data. For example, BS 105 can schedule UE 115 to perform UL and / or DL ​​communication. BS 105 can send UL and / or DL ​​scheduling permission to UE 115 via PDCCH. The scheduling permission can be sent in the form of DL control information (DCI). BS 105 can send DL communication signals (e.g., carrying data) to UE 115 via PDSCH based on the DL scheduling permission. UE 115 can send UL communication signals to BS 105 via PUSCH and / or PUCCH based on the UL scheduling permission.

[0062] In some aspects, network 100 can operate on a system BW or a component carrier (CC) BW. Network 100 can divide the system BW into multiple BWPs (e.g., portions). BS 105 can dynamically assign UE 115 to operate on a particular BWP (e.g., a portion of the system BW). The assigned BWP can be referred to as the active BWP. UE 115 can monitor the active BWP in response to signaling information from BS 105. BS 105 can schedule UE 115 to perform UL or DL ​​communication on the active BWP. In some aspects, BS 105 can assign a pair of BWPs within a CC to UE 115 for both UL and DL communication. For example, the pair of BWPs may include one BWP for UL communication and one BWP for DL ​​communication.

[0063] In some respects, network 100 may be an NR network that supports carrier aggregation (CA) of component carriers (CCs) associated with various subcarrier spacings (SCS). Network 100 may also support dynamic spectrum sharing (DSS) and cross-carrier scheduling between serving cells with different SCSs.

[0064] Figure 2 A radio frame structure 200 according to some aspects of this disclosure is shown. A BS such as BS 105 and a UE such as UE 115 in a network such as network 100 can communicate using radio frame structure 200. Specifically, the BS can communicate with the UE using time-frequency resources configured as shown in radio frame structure 200. Figure 2 In this diagram, the x-axis represents time in some arbitrary unit, and the y-axis represents frequency in some arbitrary unit. The transmission frame structure 200 includes a radio frame 201. The duration of the radio frame 201 can vary depending on various factors. In one example, the radio frame 201 may have a duration of approximately ten milliseconds. The radio frame 201 includes M time slots 202, where M can be any suitable positive integer. In one example, M may be approximately 10.

[0065] Each time slot 202 includes multiple subcarriers 204 in frequency and multiple symbols 206 in time. The number of subcarriers 204 and / or symbols 206 in time slot 202 can vary depending on various factors, such as channel BW, subcarrier spacing (SCS), and / or CP mode. One subcarrier 204 in frequency and one symbol 206 in time form a resource element (RE) 212 for transmission. Multiple consecutive subcarriers 204 in frequency and multiple subsymbols 206 in time form a resource block (RB) 210.

[0066] In one example, BS (e.g., Figure 1 BS 105 in the middle can schedule UEs (e.g., according to the time granularity of time slot 202 or micro time slot 208) Figure 1UE 115 performs UL and / or DL ​​communication. Each time slot 202 can be divided into K micro-time slots 208 in time. Each micro-time slot 208 may include one or more symbols 206. The micro-time slots 208 in time slot 202 can have variable lengths. For example, when time slot 202 includes N symbols 206, the micro-time slot 208 can have a length between one symbol 206 and (N-1) symbols 206. In some aspects, the micro-time slot 208 can have a length of approximately two symbols 206, approximately four symbols 206, or approximately seven symbols 206. In some examples, the BS can schedule the UE according to the frequency granularity of resource blocks (RBs) 210 (e.g., which includes approximately 12 subcarriers 204).

[0067] Figure 3 A public CORESET configuration scheme 300 according to some aspects of this disclosure is shown. A BS such as BS 105 and a UE such as UE 115 in a network such as network 100 can communicate using scheme 300. Specifically, the BS can use time-frequency resources configured as shown in scheme 300 to transmit PDCCH with the UE. The x-axis represents time in some arbitrary unit, and the y-axis represents frequency in some arbitrary unit.

[0068] CORESET is a set of physical time-frequency resources in which a BS (e.g., BS 105) can transmit PDCCHs to provide scheduling information and / or any DL control information to a UE (e.g., UE 115) in a network (e.g., network 100). Reference Figure 2 and Figure 3 A CORESET can span multiples of discontinuous or contiguous groups of, for example, six RBs (e.g., RB 210) in frequency and multiples of one to three consecutive OFDM symbols (e.g., symbol 206) in time. In the time domain, the duration of a CORESET can be up to three OFDM symbols and can be located anywhere within a time slot (e.g., at the beginning of a time slot). In the frequency domain, a CORESET can be defined as a multiple of six RBs up to the system carrier frequency BW (e.g., the channel frequency BW).

[0069] refer to Figure 3CORESET 301 comprises sixteen CCEs 312. CCEs 312 can be indexed from 0 to 15 (displayed as CCE1 to CCE15). CORESET 301 is CORESET#0. Each CCE 312 includes six Resource Element Groups (REGs), where a REG is defined as a physical RB within a symbol. In some respects, CORESET 301 can span 96 RBs (e.g., RB210), with an SCS of 15 kHz in frequency and one symbol in time (e.g., symbol 206). In other words, each CCE 312 can span 6 RBs in frequency and one symbol in time. In some other respects, CORESET 301 can span 48 RBs, with an SCS of 30 kHz in frequency and two symbols in time. In other words, each CCE 312 can span 3 RBs in frequency and 2 symbols in time.

[0070] A BS (e.g., BS 105) can transmit RRC information elements (e.g., MIB, SIB scheduling) using aggregations of four, eight, or sixteen CCEs 312. These RRC information elements include a search configuration for the PDCCH search space 314 associated with a CORESET 301. The PDCCH search space is an instance of a CORESET within a time slot. An aggregation of four CCEs 312 can be referred to as having an aggregation level (AL) of 4. An aggregation of eight CCEs 312 can be referred to as having an AL of 8. An aggregation of sixteen CCEs 312 can be referred to as having an AL of 16. Higher ALs provide more redundancy and frequency diversity in PDCCH transmissions, thus making the PDCCH transmission more robust. A UE (e.g., UE 115) can monitor the search space 314 by performing blind decoding to search for PDCCH candidates within the search space 314 based on an aggregation level (AL) of 4, 8, or 16. PDCCH monitoring for SIB scheduling is PDCCH type 0 monitoring. In some aspects, as part of blind PDCCH decoding, the UE can decode one candidate in the PDCCH search space when AL is 16, two candidates when AL is 8, and four candidates when AL is 4. In some aspects, PDCCH candidates in CORESET 301 are mapped to CCE 312, as follows: (1) in, This indicates the number of CCE 312 in CORESET 301. L Indicates AL, i From 0 to L -1 change, This represents the maximum number of PDCCH candidates for a given AL. According to Equation (1), candidate 302 of AL 16 is mapped to CCE 312 with indices 0 to 15, two candidates 304 are mapped to CCE 312 with indices 0 to 7 and CCE 312 with indices 8 to 15, and four candidates 306 are mapped to CCE 312 with indices 0 to 3, CCE 312 with indices 4 to 7, CCE 312 with indices 8 to 11 and CCE 312 with indices 12 to 15.

[0071] Figure 4 This is a diagram of cross-carrier scheduling scheme 400 performed by BS 405 and UE 415. BS 405 can be one of BS 105, and UE 415 can be one of UE 115 in network 100. BS 405 and UE 415 communicate using a carrier aggregation (CA) scheme, enabling UE 415 to receive DL data and / or transmit UL data on two different serving cells (first cell 410a and second cell 410b). Figure 4In this configuration, the first cell 410a is the primary cell (Pcell), and the second cell 410b is the secondary cell (Scell), where the Pcell and Scell ​​are different frequency carriers. The BS 405 can schedule the UE 415 via the first cell 410a for communication within the first cell 410a (self-scheduling). The BS 405 can also schedule the UE 415 via the second cell 410b for communication within the first cell 410a (cross-carrier scheduling). For example, the BS 405 can configure one or more DCI search spaces (including PDCCH candidates similar to search space 314) in each of the first cell 410a and the second cell 410b. For example, the BS 405 can configure a search space configuration for each search space for the UE. In the example shown, the BS 405 can configure the UE 415 with a common search space in the first cell 410a (including PDCCH candidates similar to search space 314) and two UE-specific search spaces (including PDCCH candidates) in the second cell 410b. A common search space can refer to a search space used for monitoring by a group of UEs. A UE-specific search space can refer to a search space monitored by a specific UE. For example, BS 405 can configure UE 415 with a common search space configuration 412 for monitoring the common search space in first cell 410a, and a UE-specific search space configuration 416 for monitoring the UE-specific search space in second cell 410b. Therefore, UE 415 uses the corresponding search space configurations 412, 414, and 416 to monitor the DCI in each of the first cell 410a and the second cell 410b. The first cell 410a and the second cell 410b are associated with their respective Carrier Indicator Field (CIF) (e.g., CIF = 1 for the first cell 410a and CIF = 0 for the second cell 410b). In the first cell 410a, UE 415 monitors the DCI by attempting to decode one or more PDCCH candidates using the common search space configuration 412. UE 415 can be configured for the common search space configuration of the first cell 410a by receiving an RRC information element (e.g., SIB) indicating the common search space configuration 412 from BS 405. BS 405 can determine the common search space configuration 412 based on the SCS of the first cell 410a. In the example shown, the SCS of the first cell 410a can be 15 kHz. As will be explained further below, the search space configuration used by UE 415 can indicate the periodicity of monitoring timing, the duration of monitoring timing, the monitoring timing offset, or any other appropriate monitoring parameters. Therefore, UE 415 can monitor the DCI in the search space of the first cell 410a based on the parameters of the common search space configuration 412.In response to identifying / decoding the DCI, UE415 can detect DL data and / or schedule UL data (data transmission 422) on the first cell 410a based on the scheduling information provided in the DCI. In some aspects, the DCI for cross-carrier scheduling may include UL or DL ​​communication scheduling and CIF to indicate the cell (or carrier) in which communication is being scheduled.

[0072] UE 415 also monitors the DCI in the second cell 410b. UE 415 is configured with two UE-specific search space configurations 414 and 416 for the second cell 410b. One or both of the UE-specific search space configurations 414 and 416 can be associated with the SCS of the second cell 410b. In the example shown, the SCS of the second cell 410b can be 30 kHz. The first UE-specific search space configuration 414 of the Pcell (CIF=1) includes a first set of monitoring parameters, such as monitoring timing periodicity, monitoring timing duration, monitoring timing offset, or any other suitable monitoring parameters. UE 415 monitors the DCI in the first search space (configured by configuration 414) within the second cell 410b based on the parameters of the first UE-specific search space configuration 414. In response to identifying / decoding the DCI, UE 415 can receive DL data and / or transmit UL data (data transmission 422) in the first cell 410a based on the scheduling information provided in the DCI. Therefore, it should be understood that data transmission 422 can potentially be scheduled via Pcell 410a or Scell ​​410b.

[0073] The second UE-specific search space configuration 416 of Scell ​​(CIF=0) includes a second set of monitoring parameters, such as monitoring timing periodicity, monitoring timing duration, monitoring timing offset, or any other suitable monitoring parameters. UE 415 monitors the DCI in the second search space (configured by configuration 416) within the second cell 410b based on the parameters of the second UE-specific search space configuration 416. In response to identifying / decoding the DCI, UE 415 can receive DL data (e.g., data transmission 424) and / or transmit UL data (e.g., data transmission 422) in the second cell 410b based on the scheduling information provided in the DCI. Therefore, UE 415 can monitor DCIs associated with the same serving cell and / or different serving cells (e.g., Pcell 410a) in a serving cell (e.g., Scell ​​410b). In some respects, UL resources may be available on Pcell 410a but not on Scell ​​410b. In addition, in some respects, DL data can be scheduled on Pcell 410a and Scell ​​410b.

[0074] Figure 5A and 5BThe search space configuration according to some aspects of this disclosure is shown. Specifically, Figure 5A This is a time series diagram showing the DCI monitoring scheme 500 configured using the search space. Figure 5B The diagram illustrates a component including an RRC information element 550 with a search space configuration 560. UEs such as UE 115 and 415 in a network such as network 100 can communicate using scheme 500. Scheme 500 is executed based on the parameters of the search space configuration 560.

[0075] refer to Figure 5A The DCI monitoring scheme 500 includes a UE (e.g., UE 115 or UE 415) periodically monitoring PDCCH candidates from BSs (e.g., one of BS 105, 405) within a search space 502 (shown as 502a and 502b). Search spaces 502a and 502b may correspond to a search space (e.g., search space 314) associated with a temporally repeating CORESET (e.g., CORESET 301). For example, search spaces 502a and 502b are based on various periodicity and timing parameters, including slot periodicity 506, slot offset 514, start symbol 512, and other parameters. In the illustrated embodiment, the DCI monitoring scheme 500 is configured with a slot offset 514 that is one slot offset from a reference time 501 (e.g., the start of radio frame 201). Slots 504 may be indexed (e.g., from 0 to 9, from 0 to 19). The first search space 502a appears in the second time slot 504 with time slot index 1 in a given radio frame. In some respects, the time slot offset 514 can be set based on the monitoringSlotPeriodicityAndOffset parameter 566 indicated in the search space configuration 560.

[0076] Each time slot 504 includes multiple symbols 508. Figure 5A In this configuration, each time slot 504 has 14 symbols with an index range from 0 to 13. However, other configurations are also possible, such as including time slots with seven symbols.

[0077] Search space 502a occurs once every N time slots, where N is an integer associated with time slot period 506. In some aspects, N can be 1, 2, 3, 4, 5, 7, 10, or any other suitable integer, both larger or smaller. Time slot period 506 can be set based on the monitoringSlotPeriodicityAndOffset parameter 566 indicated in search space configuration 560. In some aspects, time slot periodicity 506 can be based on or associated with the SCS of the scheduling / monitoring cell. In some aspects, serving cells with higher SCS (e.g., 30 kHz, 120 kHz) can be configured to have smaller time slot periodicity, making their monitoring more frequent compared to monitoring in cells with lower SCS (e.g., 15 kHz).

[0078] Search spaces 502a and 502b begin with start symbol 512 within time slot 504. Start symbol 512 can be set based on the monitoringSymbolWithinSlot parameter 565 indicated in search space configuration 560. In some respects, start symbol 512 can be based on or associated with the SCS of the scheduling / monitoring cell.

[0079] Search spaces 502a and 502b can be associated with a monitoring timing duration 510, which indicates the number of consecutive time slots that may exist in search space 502. In some aspects, the duration 510 is N time slots, where N is an integer. In the example shown, N is 1. The duration can be set as a parameter of search space configuration 560, or it can be a parameter based on search space configuration 560.

[0080] In some aspects, the BS can send RRC information element 550 to the UE as part of system information (e.g., to provide SIB scheduling information in the MIB), as part of the initial network access procedure, or as part of normal operation. Search space configuration 560 includes other parameters such as search space identifier 561, duration 562, CORESET ID 563, NrOfCandidate parameter 564, and search space type parameter 567. In some aspects, the BS can configure the UE with up to approximately three CORESETs and up to approximately ten search spaces, each search space instantiated from one of the CORESETs.

[0081] In some respects, the BS can configure an active BWP for the UE at any given time, for each of the P-cells or S-cells. The BS can send an RRC message to the UE, which includes the BWP configuration for communication via, for example, a BWP in a P-cell. The BWP configuration may include one or more search configurations similar to search space configuration 560, which provides the UE with DCI monitoring opportunities for scheduling transmissions in the BWP of the P-cell. Similarly, the BS can use a similar mechanism to configure an active BWP in an S-cell for the UE.

[0082] Figure 6 A cross-carrier scheduling scheme 600 according to various aspects of this disclosure is illustrated. UE 615 (which may be one of UE 115, 415 in a network such as network 100) uses scheme 600 for communication. It can be based on the above... Figure 5B The parameters of the search space configuration 560, indicated in the RRC information element 550 described herein, are used to execute scheme 600. (See reference...) Figure 6 A UE, such as UE115 or UE415, can connect to BS 605 via multiple serving cells, where BS 605 can be either BS 105 or BS 405. In the scenario shown, UE 615 connects to BS 605 via five cells: cell 610, cell 620, cell 630, cell 640, and cell 650. In some respects, each cell can be associated with a Carrier Indicator Field (CIF) value, in which case the value can be in the range of CIF=0 to CIF=4. For example, cell 610 can be a Pcell and can have a CIF of 0. Cell 620 can be a first Scell ​​and can have a CIF of 1. Cell 630 can be a second Scell ​​and can have a CIF of 2.

[0083] The cell can operate and schedule cell 602 and / or the scheduled cell 604. Figure 6 In the diagram, the first cell 610 and the second cell 620 are scheduling cells 602. However, it should be understood that other configurations are also envisioned in this disclosure, such as a single scheduling cell 602 or more than two scheduling cells 602. The shading or pattern of each cell represents the SCS of that cell, as shown in the legend. Therefore, in Figure 6In this configuration, cell 610 is associated with a 15 kHz SCS, cells 620 and 630 with a 30 kHz SCS, and cells 640 and 650 with a 120 kHz SCS. Each scheduled cell 604 is scheduled by a single scheduling cell 602 within the scheduling cells 602. For example, cell 610 is the only scheduling cell for cell 610. In other words, cell 610 is a self-scheduled cell. Similarly, cell 620 is the only scheduling cell for cell 620. Cell 620 is also the scheduling cell for cells 630 and 650. Cell 610 is also the scheduling cell for cell 640.

[0084] As explained above, UE 615 can monitor control channel information (e.g., DCI) on scheduling cell 602. UE 615 monitors control channel information based on search parameters associated with each cell. Some of these search parameters can be configured by BS 605 in the search space (e.g., Figure 5B Configured as shown in configuration 560). Furthermore, UE 715 can monitor control channel information to identify / decode control channel information by searching multiple PDCCH candidates or performing multiple blind decoding (BD). These search parameters can also indicate the maximum number of PDCCH candidates (CCE) per aggregation level. In one aspect, UE 615 is expected to perform a maximum number of BDs on more than one cell or component carrier. The maximum number of BDs expected to be performed by UE 615 on the scheduled cell (per frequency carrier) can be determined based on the following relationship: , where (2) (3) in, It is the maximum number of BDs per time slot based on the SCS configuration (µ) of the scheduling cell. The number of scheduled cells associated with or scheduled by a scheduling cell with SCS configuration µ. This represents the total number of scheduled cells. Similarly, the maximum number of non-overlapping CCEs that UE 615 can perform against scheduled cells can be determined based on the following relationship: , where (4) (5) in, It is the maximum number of CCEs per time slot based on the SCS configuration (µ) of the scheduling cell. The number of scheduled cells associated with or scheduled by a scheduling cell with SCS configuration µ. This is the total number of cells being dispatched.

[0085] In some respects, BS 605 configures UE 615 such that UE 615 may not perform more BDs than provided by equations (2)-(5) for each Scell. However, in some cases, for Pcell or P(S)cell, BS may configure UE 615 to perform more BDs than provided by equations (2)-(5). In this case, UE 615 may discard or prune some search space or search space set that exceeds the maximum number of BDs / CCEs.

[0086] Refer again Figure 6 UE 615 can monitor the scheduling permission (e.g., DCI) of scheduled cell 604 by performing BD in scheduling cell 602. The number of BDs performed by UE 615 to monitor DCI is determined for each scheduled cell, but is based on the scheduling cell's SCS (µ), and also on the total number of scheduled cells (e.g., the number of cells corresponding to BS 605 used to serve UE 615), the number of cells scheduled by the scheduling cell, and / or the capabilities of UE 615. Because in Figure 6 In this scenario, each scheduled cell is associated with a single scheduling cell, so the number of BDs performed by UE 615 when monitoring DCI scheduling DL / UL data transmission on the scheduled cell can be determined based on the SCS of the scheduling cell.

[0087] For example, each of the first cell 610 and the fourth cell 640 is scheduled by the first cell 610 with a 15kHz SCS. In some respects, for a scheduled cell with a 15kHz SCS, the UE 615 expects a maximum of 44 BDs to be performed. The total number of scheduled cells 604 is 5 (cells 610-650). The number of scheduled cells 604 scheduled by the scheduled cell 610 is 2 (cells 610 and 640). Therefore, the number of BDs performed for DCI monitoring used to schedule each of the first cell 610 and the fourth cell 640 can be determined by replacing the total number of scheduled cells (which is 5) and the number of scheduled cells scheduled by cell 610 per time slot (e.g., a 1ms time slot based on a 15kHz SCS) (which is 2), according to equations (2) and (3), as follows: Min{44, R×44×2 / 5}, (6) Where R can represent the number of scheduled cells that UE 615 can support, for example, based on the capability report of UE 615. When R is 2, equation (6) can be evaluated as approximately 35. In other embodiments, UE 615 can perform up to 35 BDs per time slot for each of the scheduled cells 610 and 640.

[0088] Similarly, each of the second cell 620, the third cell 630, the fifth cell 650, and the fourth cell 640 is scheduled by the second cell 620 with an SCS of 30 kHz. In some respects, the UE 615 expects a maximum of 35 BDs to be performed for the scheduled cell with an SCS of 30 kHz. The total number of scheduled cells 604 is 5 (cells 610-650). The number of scheduled cells 604 scheduled by the scheduled cell 620 is 3 (cells 620, 630, and 650). Therefore, the number of BDs performed for DCI monitoring for each of the scheduled cells 620, 630, and 650 can be determined by replacing the total number of scheduled cells (which is 5) and the number of scheduled cells scheduled by cell 620 per time slot (e.g., a 0.5ms time slot based on a 30kHz SCS) (which is 3), according to equations (2) and (3), as follows: Min{36, R×36×3 / 5}, (7) Where R can represent the number of scheduled cells that UE 615 can support, for example, based on the capability report of UE 615. When R is 2, equation (7) can be evaluated as approximately 35. In other embodiments, UE 615 can perform up to 36 BDs per time slot for each of the scheduled cells 620, 630 and 650.

[0089] However, in some aspects (e.g., DSS and CA), DCI associated with a scheduled cell (e.g., Pcell) can be transmitted on more than one scheduling cell (e.g., Pcell). Furthermore, two or more scheduling cells used to process PDCCH candidates can be associated with different SCSs. For example, DL / UL data transmission on a Pcell can be self-scheduled within the Pcell, or alternatively, cross-carrier scheduled on an Scell. A Pcell can have a first SCS, while an Scell ​​can have a different second SCS. For example, the SCS of a Pcell can be 15 kHz, while the SCS of an Scell ​​can be, for example, 30 kHz. Therefore, using the relationships described above, there are two possibilities for determining the number of BDs to be performed based on the two SCSs of the scheduling cells. It is expected that BS 605 transmits a DCI such that UE 615 can decode the DCI within the determined number of BDs. This disclosure describes a mechanism for determining the number of BDs to be performed to monitor control channel information (e.g., DCI) in cross-carrier scheduling scenarios, particularly in cross-carrier scheduling scenarios where the UE can use more than one scheduling cell to schedule the scheduled cell. In particular, this disclosure provides a framework for determining the number of BDs within a monitoring period of a DCI monitoring process based on the SCS associated with one of the scheduled cells.

[0090] Figure 7 A cross-carrier scheduling scheme 700 according to various aspects of this disclosure is illustrated. In some aspects, scheme 700 may be similar to... Figure 6 Scheme 600 is shown. In this respect, UE 715 (which may be one of UE115, 415 in a network such as network 100) uses scheme 700 for communication. This can be based on the above... Figure 5B The parameters of the search space configuration 560, indicated in the RRC information element 550 described herein, are used to execute scheme 700. A UE, such as UE 115 or 415, can connect to BS 705 via multiple serving cells, and BS 705 can be one of BS 105 or 405. Figure 7 In the scenario shown, UE 715 connects to BS 705 via five cells: cell 710, cell 720, cell 730, cell 740, and cell 750. In some respects, each cell may be associated with a Carrier Indicator Field (CIF) value, which in this case can be in the range of CIF = 0 to CIF = 4. For example, cell 710 may be a Pcell and may have a CIF of 0. Cell 720 may be a first Scell ​​and may have a CIF of 1. Cell 730 may be a second Scell ​​and may have a CIF of 2.

[0091] As explained further below, Figure 7 Scheme 700 may differ from some other schemes. Figure 6 Scheme 600 is shown. For example, Figure 7 Scheme 700 can represent a DSS scheme or other cross-carrier schemes where one or more scheduled cells 704 can be scheduled by more than one scheduling cell 702. Furthermore, one or more of the scheduled cells 704 can be scheduled by any of a plurality of scheduling cells 702 associated with different SCSs. For example, a first cell 710 can be self-scheduled by itself, or alternatively, it can be scheduled by a second cell 720. In one aspect, the first cell 710 can be a Pcell, and the second cell 720 can be an Scell. As illustrated in the example, the first cell 710 is associated with a 15 kHz SCS. The second cell 720 is associated with a 30 kHz SCS.

[0092] As explained above, the number of BDs per monitoring cycle (e.g., per time slot) performed by the UE 715 monitoring DCI is determined for each scheduled cell, but based on the SCS of the scheduled cell. Therefore, for the first cell 710, the number of BDs has two possible calculations. In other words, µ has two possible values ​​in the relationship described above. According to various aspects of this disclosure, the UE 715 can be configured to determine the number of BDs using the same relationship described above and based on one of the following SCSs: the lower SCS of the scheduled cell, the higher SCS of the scheduled cell, or an SCS specifically configured by RRC signaling. For example, in one aspect, the UE 715 can determine the number of BDs based on the lower SCSs of two or more scheduled cells associated with a given scheduled cell. In this aspect, reference... Figure 7 UE 715 can determine the number of BDs for the first cell 710 based on the SCS of the first cell 710 (which is the lower SCS of the two scheduling cells 710 and 720). Figure 7 In the example shown, UE 615 can determine the number of BDs used by cell 710 to schedule cells 710 and 740 based on the 15 kHz SCS used by scheduling cell 710. When applying equations (2) and (3), the number of BDs can be evaluated as described above regarding... Figure 6 The same applies to equation (6) discussed above. Similarly, UE 615 can determine the number of BDs used by cell 720 to schedule cells 720, 730, and 750 based on the 30 kHz SCS used by scheduling cell 720. When applying equations (2) and (3), the number of BDs can be evaluated as described above regarding... Figure 6 The same equation (7) is discussed.

[0093] In another aspect, UE 715 can determine the number of BDs based on the higher SCS of two or more scheduling cells associated with a given scheduled cell. For example, the higher SCS of scheduling cells 710 and 720 used for scheduling cells 710, 720, 740 and 740 is based on 30 kHz for cell 720. Therefore, for each of the first cell 710, the second cell 720, the third cell 730 and the fifth cell 750, the number of BDs to be performed for DCI monitoring can be determined by replacing the total number of scheduled cells (which is 5) and the number of scheduled cells scheduled by cell 620 per time slot (e.g., a 0.5ms time slot based on a 30kHz SCS) (which is 4), according to equations (2) and (3), as follows: Min{36, R×36×4 / 5}, (8) Where R can be 2 and thus equation (8) can be evaluated as approximately 36. In other embodiments, UE 615 may perform up to 36 BDs per time slot for each of the first cell 710, the second cell 720, the third cell 730 and the fifth cell 750.

[0094] Similarly, the scheduled cell 740 is scheduled by cell 710 with a 15 kHz SCS. The number of BDs performed for DCI monitoring used to schedule cell 740 can be determined by replacing the total number of scheduled cells (which is 5) and the number of scheduled cells scheduled by cell 710 per time slot (e.g., a 1 ms time slot based on a 15 kHz SCS) (which is 1), according to equations (2) and (3), as follows: Min{44, R×44×1 / 5}, (9) Where R can be 2 and thus equation (9) can be evaluated as approximately 17. In other embodiments, UE 615 can perform up to 17 BDs per time slot for cell 740.

[0095] In another aspect, UE 715 can determine the number of BDs per slot based on the SCS explicitly configured based on RRC signaling, where the configured SCS corresponds to the SCS of one of the scheduled cells (e.g., the first cell 710, the second cell 720).

[0096] In some respects, the SCS configuration described above can be configured by network 100. For example, BS 705 can be configured to transmit DCI based on an SCS selection configuration (e.g., higher SCS / lower SCS) configured on UE 715 for a cross-carrier scheduling scenario, where multiple scheduling cells 702 can be used for scheduling on one of the scheduled cells 704. Therefore, BS 705 can transmit DCI on scheduling cell 702, allowing UE 715 to detect DCI within a number of BDs calculated based on the SCS selection configuration.

[0097] Figure 8A and 8B Cross-carrier scheduling schemes 800 and 850 according to various aspects of this disclosure are shown respectively. UEs such as UE 115, 415, 615, and 715 in a network such as network 100 can communicate using schemes 800 and 850. Figure 5BThe parameters of the search space configuration 560 indicated in the RRC information element 550 described herein are used to execute schemes 800 and 850. A UE (e.g., one of UE 115 or 415) may connect to a BS (e.g., one of BS 105, 405, 605, 705) via multiple serving cells. In the illustrated scenario, the UE connects to the BS via Pcell 810 and Scell ​​820, where Pcell 820 or Scell ​​820 can be used to schedule DL (e.g., PDSCH) and / or UL data transmissions (e.g., PUSCH) on Pcell 810. In some aspects, the search space 826 on Scell ​​820 may be associated with DL / UL scheduling permissions on Pcell 810. In another aspect, the search space 824 on Scell ​​820 may be associated with DL / UL self-scheduling permissions on Scell ​​820. In yet another aspect, the search space 822 on Scell ​​820 may be associated with DL / UL scheduling permissions on different cells such as Scell.

[0098] The UE monitors DCIs in Pcell 810, also known as PDCCH candidates, in search space 812. The UE also monitors DCIs in Scell ​​820, including PDCCH candidates 822a, 822b, and 822c, in search space 822. Although shown separately, it should be understood that PDCCH candidates 822a, 822b, and 822c reside within the same search space 822. PDCCH candidates 822a, 822b, and 822c may correspond to different scheduled cells. For example, PDCCH candidate 822a corresponds to a DCI used for scheduling on Pcell 810, and PDCCH candidate 822b corresponds to a self-scheduled DCI used on Scell ​​820. DCIs received in search spaces 812 and 822 may include DL / UL scheduling permission for Pcell 810. The UE may be configured with one or more search space configurations, including slot periodicity, slot offset, duration, and / or any other appropriate search space configuration parameters. In one respect, each of search spaces 812 and 822 is associated with a different search space configuration.

[0099] refer to Figure 8AThe UE can perform scheduling of DL and / or UL data on Pcell 810 by executing multiple BDs in PDCCH candidate 822a of search space 812 and / or search space 822. The number of BDs can be based on one of the SCSs of the scheduling cells. For example, the UE can be configured to determine the number of BDs used for DCI monitoring based on the lower SCS of the two scheduling cells 810 and 820. Alternatively, the UE can be configured to determine the number of BDs used for DCI monitoring based on the higher SCS of the two scheduling cells 810 and 820. Alternatively, the UE can be configured to determine the number of BDs used for DCI monitoring based on the SCS explicitly configured by RRC signaling.

[0100] exist Figure 8A In scenario 800, the number of BDs is determined using the SCS of Pcell 810. In this scenario 800, the number of BDs is counted in the cell that schedules DL and / or UL data for the scheduled cell. Therefore, the UE in Pcell 810 performs a first subset of BDs against PDCCH candidates in search space 812, and the UE in Scell ​​820 performs a second subset of BDs against PDCCH candidates 822a in search space 822. In this respect, to schedule DL and / or UL data on Pcell 810, as shown in box 830, the number of BDs per Pcell slot is allocated or assigned between Pcell 810 and Scell ​​820. Box 830 contains PDCCH candidates (e.g., 822a) that the UE can search within a determined BD / CCE budget. Figure 8A In this process, the number of BDs and / or non-overlapping CCEs is counted for each Pcell time slot, where the duration of each Pcell time slot can be longer than that of the Scell ​​time slot. For example, in one aspect, Pcell 810 has a 15 kHz SCS and a 1.0 ms time slot length, while Scell ​​820 has a 30 kHz SCS and a 0.5 ms time slot length. Therefore, the number of BDs and / or CCEs is counted on a single time slot of Pcell 820, but on two time slots of Scell ​​820. In other words, the number of BDs per time slot is determined based on the time slot duration of the scheduled cell.

[0101] refer to Figure 7 In one aspect, the number of BDs in a subset associated with the first cell (Pcell 710) is determined such that the number of BDs in each scheduled cell is proportional to the SCS configuration of each scheduled cell, or inversely proportional to the slot length. In other aspects, the number of BDs can be determined based on the ratio of the number of slots in the monitoring period or subframe of the scheduled cell to the sum of the number of slots in the monitoring period of all scheduled cells. For example, with a given scheduled cell X (N SubX The number of BDs in a given subset of the associated dataset can be based on the following relationship: (10) in, N BD It is a definite total number of BDs counted across scheduling cells. N Slots,X It is the number of time slots per subframe (1ms) configured in the SCS of cell X, and N Slots,Y This refers to the number of time slots per subframe (1ms) configured by the SCS of scheduling cell Y. For example, Pcell 710 with a 15kHz SCS can have 1 time slot per subframe (1ms), while Scell ​​720 with a 30kHz SCS can have 2 time slots per subframe (1ms). Therefore, if a total of 35 BDs are counted on Pcell 710 with a 15kHz SCS and Scell ​​720 with a 30kHz SCS, the number of BDs allocated to Pcell 710 can be 35×(1 / (1+2)), while the number of BDs allocated to Pcell 710 can be 35×(2 / (1+2)).

[0102] Refer again Figure 7 In one respect, the BDs in the subset associated with the first cell (Pcell 710) are N p The BD in the subset associated with the second cell (Scell ​​720) is N BD – N p ,in N p It is the maximum number of BDs that the UE needs to monitor in one time slot across all time slots in the first cell (Pcell 710).

[0103] refer to Figure 7 In one aspect, BDs in a subset associated with the first cell (Pcell 710) and / or BDs in a subset associated with the second cell (Scell ​​720) are configured as part of an RRC configuration, wherein the total number of BDs associated with the first cell (Pcell 710) and the second cell (Scell ​​710) does not exceed N BD .

[0104] and Figure 8A Compared to scheme 800 shown, Figure 8BThe scheme 850 shown counts the number of BDs based on the slot length of the Scell ​​and the SCS. Therefore, as shown in box 840, the number of BDs is counted between Pcell 810 and Scell ​​820, where each box 840 spans one Scell ​​820 slot. Similar to... Figure 8A In the scheme 800 shown, the UE performs a first subset of the BD for the PDCCH candidates in the search space 812 on Pcell 810, and performs a second subset of the BD for the PDCCH candidates 822a in the search space 822 on Scell ​​820.

[0105] In some respects, network 100 can configure UE 115 via BS 105, so that UE 115 does not need to perform the above-mentioned procedures. Figure 6 and 7 The described BD / CCE limits more BDs. However, in some respects, the number of BD or PDCCH candidates associated with the search space set may exceed the limit for BD and / or PDCCH candidates for a given time slot. For example, for PDCCH candidates associated with scheduling DL and / or UL data on Pcell or P(S)cell, such as Figure 8A and 8B As shown, the number of PDCCH candidates counted across cells within a given time slot exceeds the BD limit determined based on the SCS of the scheduling cell. Therefore, the UE can be configured to discard or remove one or more PDCCH candidates from the search space set such that the number of BDs performed by the UE does not exceed the limits provided above (e.g., equations (2)-(5)). This disclosure provides a mechanism for discarding or removing PDCCH candidates based on search space configuration parameters. Discarding or removing PDCCH candidates can mean that the UE skips monitoring these PDCCH candidates. In other words, the UE does not perform BDs on discarded PDCCH candidates.

[0106] Figure 9 and Figure 10 Based on various aspects of this disclosure, control channel information monitoring schemes 900 and 1000 are shown respectively. UEs such as UE 115 and 415 in networks such as network 100 in CA communication scenarios can adopt schemes 900 and 1000. Figure 5B The parameters of the search space configuration 560, indicated in the RRC information element 550 described herein, are used to execute schemes 900 and 1000. A UE (e.g., one of UEs 115, 415, 615, or 715) can connect to a BS (e.g., one of BSs 105, 405, 605, or 705) via multiple serving cells. Figure 9In scheme 900, the UE connects to the BS via a first cell 910 with cell index 0, a second cell 920 with cell index 1, and a third cell 930 with cell index 2. The cell index can be a carrier indicator field (CIF) value. In one aspect, the first cell 910 can be a Pcell, and the second cell 920 and the third cell 930 can be Scells. Figure 9 Multiple search spaces or PDCCH candidates associated with a cell are shown, each search space being associated with a search space identifier value. It should be understood that each search space can be configured with one search space (e.g., Figure 5B The configuration shown in Figure 560 is associated with this. The search space identifier value can be indicated in a field of the search space configuration. For example, the UE in the first cell 910 monitors the first search space 912 and the second search space 914. The first search space 912 has a search space identifier of 0, while the second search space 914 has a search space identifier of 2. Furthermore, the UE in the second cell 920 monitors the third search space 922 and the fourth search space 924. The third search space 922 has a search space identifier of 1, and the fourth search space 924 has a cell identifier of 4. The UE in the third cell monitors the fifth search space 926. The fifth search space 932 has a cell identifier of 3.

[0107] exist Figure 9 In scheme 900, the UE is configured to discard search space based on an associated search space identifier value. Specifically, the UE is configured to discard search space starting from a higher search space identifier value until the amount of remaining search space is within the BD limit that the UE is configured to perform during monitoring period 902 (e.g., a 1ms or 0.5ms slot depending on the SCS). Figure 9 In this scenario, the UE is configured to discard the fourth search space 924, which has the highest search space identifier value of 4. The remaining search spaces 912, 914, 922, and 932 fall within the UE's BD budget, which is four in this scenario. However, it should be understood that... Figure 9 The scheme 900 shown is exemplary, and the UE can be configured to discard or retain more search space than specifically shown. In some aspects, lower-indexed search spaces (e.g., search index 0 for the common search space) can carry more scheduling / DCI for more important information (e.g., system information), so the UE can discard search space from the highest search space index to a lower index. In some other aspects, the UE can discard search space in the reverse order, for example, from the lowest search space index to the highest search space index.

[0108] exist Figure 10In scheme 1000, the UE connects to the BS via a first cell 1010 with cell index 0, a second cell 1020 with cell index 1, and a third cell 1030 with cell index 2. The cell index can be a carrier indicator field (CIF) value. In one aspect, the first cell 1010 can be a Pcell, and the second cell 1020 and the third cell 1030 can be Scells. Figure 10 Multiple search spaces or PDCCH candidates associated with a cell are shown, each search space being associated with a search space identifier value. It should be understood that each search space can be configured with one search space (e.g., Figure 5B The configuration shown in Figure 560 is associated with a search space identifier value. The search space identifier value can be indicated in a field of the search space configuration. For example, the UE in the first cell 1010 executes a first search space 1012 and a second search space 1014. The first search space has a search space identifier of 0, and the second search space 1014 has a search space identifier of 2. Furthermore, a third search space 1022 and a fourth search space 1024 are executed in the second cell 1020. The third search space 1022 has a search space identifier of 1, and the fourth search space 1024 has a cell identifier of 4. A fifth search space 1032 is executed in the third cell. The fifth search space 1032 has a cell identifier of 3. Each search space can be associated with a search space configuration (e.g., as shown above in Figure 560). Figure 5B The configuration shown in Figure 560 is associated with this.

[0109] exist Figure 10 In the illustrated scheme 1000, the UE is configured to discard search spaces based on the cell index associated with each search space. Specifically, the UE is configured to discard search spaces associated with higher cell indices until the remaining number of search spaces falls within the number of BD and / or PDCCH candidate limits determined for monitoring period 1002 (e.g., depending on the 1ms or 0.5ms slot of the SCS). Therefore, the UE is configured to discard the fifth search space 1032 associated with the highest cell index value 2. The remaining search spaces 1012, 1014, 1022, and 1024 fall within the BD and / or CCE budget determined by the UE. Therefore, the UE monitors the DCI in the remaining search spaces 1012, 1014, and 1022. However, it should be understood that... Figure 10The scheme 1000 shown is exemplary, and the UE can be configured to discard or retain more search space than specifically shown. In some aspects, the UE can discard search space based on the cell index, followed by the search space index. For example, if the number of BDs still exceeds the limit after discarding search space 1032, the UE can discard search space 1024 based on the fact that search space 1024 is within cell 1020 with the next highest cell index and that search space 1024 is the search space with the highest search space index in cell 1020.

[0110] Figure 11 This is a block diagram of an exemplary BS 1100 based on some aspects of this disclosure. BS 1100 can be as shown above. Figure 1 The network 100 discussed herein includes a BS 105. As shown, the BS 1100 may include a processor 1102, a memory 1104, an intercarrier scheduling module 1108, a transceiver 1110 (which includes a modem subsystem 1112 and an RF unit 1114), and one or more antennas 1116. These components may communicate directly or indirectly with each other, for example, via one or more buses.

[0111] Processor 1102 may have various features as a particular type of processor. For example, these may include: a CPU, DSP, ASIC, controller, FPGA device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein. Processor 1102 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, several microprocessors, one or more microprocessors combined with a DSP core, or any other such architecture.

[0112] Memory 1104 may include cache memory (e.g., cache memory of processor 1102), RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, solid-state memory devices, one or more hard disk drives, memristor-based arrays, other forms of volatile and non-volatile memory, or combinations of different types of memory. In some aspects, memory 1104 may include non-transitory computer-readable media. Memory 1104 may store instructions 1106. Instructions 1106 may include, when executed by processor 1102, causing processor 1102 to perform the operations described herein (e.g., ...). Figure 3-7 10 and Figure 12(All aspects). Instruction 1106 may also be referred to as program code. Program code can be used to cause a wireless communication device to perform these operations, for example by causing one or more processors (e.g., processor 1102) to control or command the wireless communication device to do so. The terms “instruction” and “code” should be interpreted broadly to include any type of computer-readable statement. For example, the terms “instruction” and “code” can refer to one or more programs, routines, subroutines, functions, procedures, etc. “Instruction” and “code” can include a single computer-readable statement or multiple computer-readable statements.

[0113] The cross-carrier scheduling module 1108 can be implemented via hardware, software, or a combination thereof. For example, the cross-carrier scheduling module 1108 can be implemented as a processor, circuitry, and / or instructions 1106 stored in memory 1104 and executed by processor 1102. In some examples, the cross-carrier scheduling module 1108 can be integrated within the modem subsystem 1112. The cross-carrier scheduling module 1108 can 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 circuitry) within the modem subsystem 1112.

[0114] The cross-carrier scheduling module 1108 can be used in various aspects of this disclosure (e.g., Figure 3-10 and / or Figure 13 (Various aspects). In one aspect, the cross-carrier scheduling module 1108 is configured to send a first configuration to the UE (e.g., one of UE 115, 415, 615, 715, 1200) for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first SCS. In another aspect, the cross-carrier scheduling module 1108 is configured to send a second configuration to the UE for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS. In another aspect, the cross-carrier scheduling module 1108 is configured to send a third configuration to the UE indicating a third SCS associated with the number of DCI BDs in the first and second search spaces, wherein the third SCS corresponds to one of the first SCS or the second SCS. In another aspect, the cross-carrier scheduling module 1108 is configured to send DCIs to the UE in at least one of the first or second search spaces.

[0115] As shown in the figure, transceiver 1110 may include modem subsystem 1112 and RF unit 1114. Transceiver 1110 may be configured to communicate bidirectionally with other devices (e.g., UE 115 and / or another core network element). Modem subsystem 1112 may be configured to modulate and / or encode data according to MCS (e.g., LDPC coding scheme, turbo coding scheme, convolutional coding scheme, digital beamforming scheme, etc.). RF unit 1114 may be configured to process modulated / coded data (e.g., PDCCH, PDSCH, SSB, SIB, initial BWP configuration, PDCCH common configuration, search space configuration) from modem subsystem 1112 (regarding outbound transmissions) or transmissions originating from another source (e.g., UE 115) (e.g., performing analog-to-digital conversion or digital-to-analog conversion, etc.). Furthermore, RF unit 1114 may also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as integrated with transceiver 1110, modem subsystem 1112 and / or RF unit 1114 may be separate devices coupled together at BS 105 to enable BS 105 to communicate with other devices.

[0116] RF unit 1114 can provide modulated and / or processed data (e.g., data packets (or more specifically, data messages containing one or more data packets and other information)) to antenna 1116 for transmission to one or more other devices. For example, this may include, according to some aspects of this disclosure, transmitting information to complete network attachment and communication with the resident UE 115. Antenna 1116 can also receive data messages transmitted from other devices and provide the received data messages for processing and / or demodulation at transceiver 1110. Transceiver 1110 can provide demodulated and decoded data (e.g., UE capability reports, MSG1, MSG3, ACK / NACK, PUCCH, PUSCH) to cross-carrier scheduling module 1108 for processing. Antenna 1116 may include multiple antennas with similar or different designs to maintain multiple transmission links.

[0117] In some respects, processor 1102 is configured to coordinate with cross-carrier scheduling module 1108 to send a search space configuration associated with a second SCS of the scheduled cell to the UE on the scheduling cell having a first SCS, and to send a DCI to the UE on the scheduling cell.

[0118] In one aspect, BS 1100 may include multiple transceivers 1110 implementing different RATs (e.g., NR and LTE). In another aspect, BS 1100 may include a single transceiver 1110 implementing multiple RATs (e.g., NR and LTE). In yet another aspect, transceiver 1110 may include various components, wherein different combinations of components can implement different RATs.

[0119] Figure 12 This is a block diagram of an exemplary UE 1200 based on some aspects of this disclosure. UE 1200 can be as shown above. Figure 1 The UE 115 discussed herein. As shown in the figure, the UE 1200 may include a processor 1202, a memory 1204, an intercarrier scheduling module 1208, a transceiver 1210 (which includes a modem subsystem 1212 and a radio frequency (RF) unit 1214), and one or more antennas 1216. These components may communicate directly or indirectly with each other, for example, via one or more buses.

[0120] Processor 1202 may include a central processing unit (CPU), digital signal processor (DSP), application-specific integrated circuit (ASIC), controller, field-programmable gate array (FPGA) device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein. Processor 1202 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, several microprocessors, one or more microprocessors combined with a DSP core, or any other such architecture.

[0121] Memory 1204 may include cache memory (e.g., cache memory of processor 1202), 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 memory devices, hard disk drives, other forms of volatile and non-volatile memory, or combinations of different types of memory. In one aspect, memory 1204 includes a non-transitory computer-readable medium. Memory 1204 may store instructions 1206 or have instructions 1206 recorded thereon. Instructions 1206 may include, when executed by processor 1202, causing processor 1202 to perform the operations described herein with respect to UE 115 in conjunction with various aspects of this disclosure (e.g., ...). Figure 3-7 10 and Figure 11Instructions (in all aspects). Furthermore, instruction 1206 can also be referred to as program code, which can be broadly interpreted to include any type of computer-readable statement, as discussed above with respect to Figure 8.

[0122] The cross-carrier scheduling module 1208 can be implemented via hardware, software, or a combination thereof. For example, the cross-carrier scheduling module 1208 can be implemented as a processor, circuitry, and / or instructions 1206 stored in memory 1204 and executed by processor 1202. In some examples, the cross-carrier scheduling module 1208 can be integrated into the modem subsystem 1212. The cross-carrier scheduling module 1208 can be implemented through a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 1212.

[0123] The cross-carrier scheduling module 1208 can be used in various aspects of this disclosure, such as... Figure 3-10 Regarding aspect 13, in one aspect, the cross-carrier scheduling module 1208 is configured to receive from a BS (e.g., one of BS 105, 405, 1100) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first SCS. The cross-carrier scheduling module 1208 is also configured to receive from the BS a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS. The cross-carrier scheduling module 1208 is also configured to determine the number of BDs based on at least one of the first SCS or the second SCS, and to monitor DCIs in the first and second search spaces based on the number of BDs.

[0124] As shown in the figure, transceiver 1210 may include modem subsystem 1212 and RF unit 1214. Transceiver 1210 may be configured to communicate bidirectionally with other devices (e.g., BS 105). Modem subsystem 1212 may be configured to modulate and / or encode data from memory 1204 and / or cross-carrier scheduling module 1208 according to modulation and coding schemes (MCS) (e.g., low-density parity-check (LDPC) coding scheme, turbo coding scheme, convolutional coding scheme, digital beamforming scheme, etc.). RF unit 1214 may be configured to process modulated / coded data (e.g., UE capability reports, MSG1, MSG3, ACK / NACK, PUCCH) from modem subsystem 1212 (regarding outbound transmissions) or transmissions originating from another source (e.g., UE 115 or BS 105) (e.g., performing analog-to-digital conversion or digital-to-analog conversion, etc.). Furthermore, RF unit 1214 may also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as integrated with transceiver 1210, modem subsystem 1212 and RF unit 1214 can be separate devices coupled together at UE 115 to enable UE 115 to communicate with other devices.

[0125] RF unit 1214 can provide modulated and / or processed data (e.g., data packets (or more specifically, data messages containing one or more data packets and other information)) to antenna 1216 for transmission to one or more other devices. Antenna 1216 can also receive data messages transmitted from other devices. Antenna 1216 can provide the received data messages for processing and / or demodulation at transceiver 1210. Transceiver 1210 can provide demodulated and decoded data (e.g., PDCCH, PDSCH, RRC configuration, SSB, SIB, PDCCH, search space configuration) to cross-carrier scheduling module 1208 for processing. Antenna 1216 may include multiple antennas with similar or different designs to maintain multiple transmission links. RF unit 1214 can configure antenna 1216.

[0126] In some respects, processor 1202 is configured to coordinate with cross-carrier scheduling module 1208 to perform DCI monitoring in a scheduled cell having a first SCS using a search space configuration associated with a second SCS of the scheduled cell.

[0127] In one aspect, UE 1200 may include multiple transceivers 1210 implementing different RATs (e.g., NR and LTE). In another aspect, UE 1200 may include a single transceiver 1210 implementing multiple RATs (e.g., NR and LTE). In yet another aspect, transceiver 1210 may include various components, wherein different combinations of components can implement different RATs.

[0128] Figure 13 This is a signaling diagram illustrating a cross-carrier scheduling method 1300 according to some aspects of this disclosure. Method 1300 can be implemented between BS 1302 and UE 1304. BS 1302 can correspond to BS 105, 405, or 1100, and the UE can correspond to UE 115, 415, or 1200. In some instances, UE 1304 can be configured to perform carrier aggregation (CA) and cross-carrier scheduling among multiple serving cells (including Pcells and at least one Scell). See separate references for further details. Figure 3-10 Method 1300 is implemented using schemes 300, 400, 500, 600, 700, 800, 850, 900, 1000, and / or 1300 discussed in section 13. As shown, method 1300 includes a plurality of enumerated actions, but embodiments of method 1300 may include additional actions before, after, and between the enumerated actions. In some embodiments, one or more of the enumerated actions may be omitted or performed in a different order.

[0129] At a higher level, to monitor DCIs on different cells associated with different SCSs, UE 1304 can determine the number of BDs and / or CCEs based on the SCS of one of the scheduled cells. For example, when DL / UL data transmission on a scheduled cell can be scheduled by more than one scheduled cell, the UE can determine the number of BDs and / or CCEs based on the higher or lower SCS of the scheduled cells. Alternatively, the UE can determine the number of BDs and / or CCEs based on an SCS explicitly configured by RRC signaling. BDs and / or CCEs can be counted across scheduled cells because DCIs can be transmitted on any scheduled cell for a given scheduled cell. The BS can transmit DCIs according to this framework, enabling the UE to detect DCIs within the BD and / or CCE limits determined by the UE.

[0130] In action 1305, BS 1302 sends a first search space configuration to the UE. In some aspects, the first search space configuration can be used for scheduling on a first cell (which may be a Pcell) and can be sent to the UE via the first cell or a second cell (which may be an Scell). For example, UE 1304 can use the first search space configuration to monitor DCI in the search space of a second cell, where the search space of the second cell is used to schedule data transmission on the first cell. The first search space configuration may include or indicate multiple parameters for monitoring DCI. For example, the first search space configuration may indicate slot periodicity and offset, duration, start symbol, or any other appropriate parameters. Furthermore, the first search space configuration may indicate a search space identifier value and cell index (e.g., CIF) for which the search space is performed. The first search space configuration may include one or more of the parameters in search space configuration 560. The first search space configuration may be included in an RRC information element or message. In one aspect, the first search space configuration may be a UE-specific search space configuration for monitoring DCI in the search space of an Scell, where the DCI in the search space indicates scheduling information for scheduling DL and / or UL data on a Pcell. The first search space configuration can be based on or associated with the SCS of the cell on which the search space is used. For example, a P-cell can have a first SCS, and an S-cell can have a second SCS higher than the first SCS. In one aspect, the first SCS can be 15 kHz, and the second SCS can be 30 kHz, 120 kHz, or any other suitable SCS value. In some cases, BS 1302 can utilize one or more components such as processor 1102, memory 1104, cross-carrier scheduling module 1108, transceiver 1110, modem 1112, and one or more antennas 1116 to perform aspects of action 1305.

[0131] In action 1310, BS 1302 sends a second search space configuration to the UE. In some aspects, the second search space configuration can be used for scheduling on a second cell and can be sent via either the first or second cell. For example, UE 1304 can use the second search space configuration to monitor DCI in a search space within a second cell, where the search space is used to schedule data transmission on the second cell. The second search space configuration can include or indicate multiple parameters for monitoring DCI. The second search space configuration can indicate slot periodicity and offset, duration, start symbol, or any other suitable parameters. For example, the second search space configuration can include one or more of the parameters in search space configuration 560. The second search space configuration can be included in an RRC information element or message. Furthermore, the second search space configuration can indicate a search space identifier value and cell index (e.g., CIF) for which the search space is performed. The second search space configuration can be based on or associated with the SCS of the cell on which the search space is used. In one aspect, the second search space configuration can be a UE-specific search space configuration for monitoring DCI on an Scell ​​with a second SCS. In some cases, BS 1302 may utilize one or more components such as processor 1102, memory 1104, cross-carrier scheduling module 1108, transceiver 1110, modem 1112 and one or more antennas 1116 to perform aspects of action 1310.

[0132] In some respects, the first search space configuration can indicate search space index 1 of the search space in the reference second cell. The second search space configuration can also indicate search space index 1 of the same search space in the reference second cell. However, the first and second search space configurations can have different monitoring periodicity parameters and / or different monitoring slot offset parameters, as mentioned above. Figure 7 The subject of discussion.

[0133] In action 1315, UE 1304 detects a first search space configuration. In some aspects, the first search space configuration can be detected on a P-cell or an S-cell. Detecting the first search space configuration may include receiving and decoding RRC information elements. The first search space configuration may be associated with the SCS of a P-cell, which may be a scheduled cell in a cross-carrier scheduling scenario. In some cases, UE 1304 may utilize one or more components such as processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212, and one or more antennas 1216 to perform aspects of action 1315.

[0134] In action 1320, UE 1304 detects a second search space configuration. In some aspects, the second search space configuration can be detected on either a P-cell or an S-cell. Detecting the second search space configuration may include receiving and decoding RRC information elements. The second search space configuration may be associated with the SCS of the S-cell, which may be a scheduling cell in a cross-carrier scheduling scenario. In some aspects, the SCS of the S-cell may differ from the SCS of the P-cell. For example, the SCS of the S-cell may be greater than the SCS of the P-cell. In some cases, UE 1304 may utilize one or more components such as processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212, and one or more antennas 1216 to perform aspects of action 1320.

[0135] In action 1325, UE 1304 determines the maximum number of BDs (PDCCH candidates) used for each monitoring period of the DCI. As explained above, in some respects, more than one cell can be used to schedule DL / UL transmissions on a scheduled cell. Therefore, monitoring the DCI to schedule data transmissions on a scheduled cell can include using a search space or PDCCH candidates counted across multiple scheduled cells. Furthermore, the scheduled cells can have different SCSs. Since the number of BDs performed within a monitoring period is based on the SCS, the UE determines the number of BDs based on the SCS associated with at least one of the scheduled cells. For example, the UE can use equations (2) and (3) and determine the number of BDs based on the lower SCS of the scheduled cell. For example, if both Pcell and Scell ​​can be used to schedule DL / UL transmissions on Pcell, the UE can determine the number of BDs based on the SCS of Pcell, where Pcell has a lower SCS than Scell. In another respect, the UE can determine the number of BDs based on the higher SCS of the scheduled cell. For example, if both Pcell and Scell ​​can be used to schedule DL / UL transmissions on Pcell, the UE can determine the number of BDs based on the Scell ​​with a higher SCS than Pcell.

[0136] Because BS 1302 can transmit DCI on any scheduling cell, it can count the number of BDs determined in action 1325 across scheduling cells, as shown above. Figure 8A and 8BAs shown, the number of BDs can be determined for each monitoring period, which can be a time slot. In one aspect, the monitoring period can be based on the time slot length of one of the scheduled cells. For example, if the number of BDs is determined using the SCS of a scheduled Scell ​​in action 1325, the number of BDs can be calculated against the time slot length in the scheduled Scell. Alternatively, if the number of BDs is determined using the SCS of a scheduled Pcell in action 1325, the number of BDs can be counted against the time slot length of the scheduled Pcell. In some cases, UE 1304 can utilize components such as processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212, and one or more antennas 1216 to perform aspects of action 1320.

[0137] In action 1330, UE 1304 discards or removes search spaces or PDCCH candidates that exceed the BD limit determined in action 1325 within each monitoring cycle. The UE may discard search spaces based on the search space identifier value associated with each search space and / or the cell index (e.g., CIF) associated with each search space, as described above. Figure 9 and Figure 10 As shown. In some cases, UE 1304 may utilize one or more components such as processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212 and one or more antennas 1216 to perform aspects of action 1330.

[0138] In action 1335, BS 1302 transmits DCI via Scell. In some aspects, DCI may include a first DCI transmitted in a search space within Scell ​​according to a first search space configuration, and a second DCI transmitted in a search space within Scell ​​according to a second search space configuration. The DCI may include scheduling information for DL ​​and / or UL data on Pcell and / or Scell. For example, the first DCI may indicate the location of DL data in PDSCH on Pcell, or may include UL permission for UL data in PUSCH on Pcell. Furthermore, the second DCI may indicate the location of DL data in PDSCH on Scell. BS 1302 may transmit DCI according to the framework used by UE 1304 to determine the aforementioned BD and / or CCE restrictions, enabling the UE to successfully detect DCIs within the BD and / or CCE restrictions. In some cases, BS 1302 may utilize one or more components such as processor 1102, memory 1104, cross-carrier scheduling module 1108, transceiver 1110, modem 1112 and one or more antennas 1116 to perform aspects of action 1335.

[0139] In action 1340, BS 1302 transmits DL data in the PDSCH via the Pcell. The DL data is transmitted according to scheduling information provided in the DCI (first DCI) associated with the Pcell, and DL data is transmitted to UE 1304 in the search space of the Scell ​​according to the first search space configuration. In some cases, BS 1302 may utilize one or more components such as processor 1102, memory 1104, cross-carrier scheduling module 1108, transceiver 1110, modem 1112, and one or more antennas 1116 to perform aspects of action 1035.

[0140] In action 1345, UE 1004 detects the DCI on the Scell. Detecting the DCI may include successfully decoding the DCI based on the determined number of BDs described above with respect to action 1325. In some aspects, as explained above, detecting the DCI on the Scell ​​may include detecting multiple DCIs among the PDCCH candidates within the search space of the Scell, wherein each DCI (e.g., a first DCI, a second DCI) is associated with DL and / or UL data scheduled on different scheduled cells. In some cases, UE 1304 may utilize one or more components such as processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212, and one or more antennas 1216 to perform aspects of action 1345.

[0141] In action 1350, UE 1304 detects DL data transmitted via PDSCH in Pcell in action 1340. DL data can be detected based on scheduling information provided by DCI in the search space of Scell. In some cases, UE 1304 may utilize one or more components such as processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212, and one or more antennas 1216 to perform aspects of action 1350.

[0142] In action 1355 (which may be optional or an alternative to action 1350), UE 1304 generates and prepares UL data for transmission in the PUSCH on the Pcell based on the UL permission provided in the DCI detected in action 1345. In some aspects, the Scell ​​(the scheduling cell in the illustrated scenario) may not have UL resources. Therefore, UL transmissions can be scheduled in the Pcell or in a different Scell ​​outside the scheduling Scell. In some cases, UE 1304 may utilize one or more components such as processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212, and one or more antennas 1216 to perform aspects of action 1355.

[0143] In action 1360 (which may be an optional action), UE 1304 transmits UL data to BS 1302 via Pcell in the PUSCH. In some cases, UE 1304 may utilize one or more components such as processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212, and one or more antennas 1216 to perform aspects of action 1360.

[0144] Figure 14 This is a flowchart of a wireless communication method 1400 according to some aspects of this disclosure. Aspects of method 1400 can be performed by a computing device of a wireless communication device (e.g., a processor, processing circuitry, and / or other suitable components) or other suitable units for performing these steps. For example, a wireless communication device such as UE 115, 415, 1200 can utilize one or more components (e.g., processor 1202, memory 1204, cross-carrier scheduling module 1208, transceiver 1210, modem 1212, and one or more antennas 1216) to perform the steps of method 1400. Method 1400 can adopt the same approach as described above. Figure 3-10 and Figure 13A similar mechanism is described in [the document]. As shown in the figure, method 1400 includes multiple enumeration steps, but aspects of method 1400 may include other steps before, after, and between the enumeration steps. In some aspects, one or more enumeration steps may be omitted or executed in a different order.

[0145] At box 1410, the UE receives from a BS (e.g., one of BS 105, 405, 605, 705, 1100) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first SCS.

[0146] At box 1420, the UE receives from the BS a second configuration for scheduling in a first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS.

[0147] At block 1430, the UE determines the number of BDs based on at least one of a first SCS or a second SCS. In one aspect, determining the number of BDs includes: selecting a lower SCS between the first SCS and the second SCS, and determining the number of BDs based on a configuration associated with the lower SCS. In another aspect, determining the number of BDs includes: selecting a higher SCS between the first SCS and the second SCS, and determining the number of BDs based on a configuration associated with the higher SCS. In some aspects, the first configuration indicates a first monitoring period, and the second configuration indicates a second monitoring period different from the first monitoring period. In some aspects, determining the number of BDs is further based on at least one of the first monitoring period, the first SCS, the second monitoring period, or the first SCS.

[0148] At box 1440, the UE monitors DCIs in a first search space and a second search space based on the number of BDs. In one aspect, monitoring DCIs includes: performing a first subset of BDs in the first search space and performing a second subset of BDs in the second search space. In another aspect, monitoring DCIs includes: determining whether the total number of DCI candidates in the first and second search spaces exceeds the number of BDs, and in response to determining that the total number of DCI candidates exceeds the number of BDs, excluding either the first or second search space from the monitoring based on search space identifiers associated with the first and second search spaces. In some aspects, at least one of the first search spaces includes a first plurality of search spaces, or the second search space includes a second plurality of search spaces, and monitoring of the DCI includes: determining that the total number of DCI candidates in the at least one of the first plurality of search spaces exceeds the number of BDs; in response to determining that the total number of DCI candidates exceeds the number of BDs, excluding one or more search spaces from at least one of the first plurality of search spaces or the second plurality of search spaces based on cell identifiers associated with the one or more search spaces; and further excluding one or more other search spaces from the at least one of the first plurality of search spaces or the second plurality of search spaces based on search space identifiers associated with the one or more other search spaces.

[0149] In some aspects, method 1400 further includes: receiving from the BS an RRC configuration indicating a third SCS, wherein the third SCS corresponds to either the first SCS or the second SCS. In some aspects, determining the number of BDs at block 1430 is further based on the third SCS.

[0150] Figure 15 This is a flowchart of a wireless communication method 1500 according to some aspects of this disclosure. Aspects of method 1500 can be performed by a computing device of a wireless communication device (e.g., a processor, processing circuitry, and / or other suitable components) or other suitable units for performing these steps. For example, a wireless communication device such as BS 105, 405, 1100 can utilize one or more components (e.g., processor 1102, memory 1104, cross-carrier scheduling module 1108, transceiver 1110, modem 1112, and one or more antennas 1116) to perform the steps of method 1500. Method 1500 can adopt the same approach as described above. Figure 3-10 and Figure 13 A similar mechanism is described in [the document]. As shown in the figure, method 1500 includes multiple enumeration steps, but aspects of method 1500 may include other steps before, after, and between the enumeration steps. In some aspects, one or more enumeration steps may be omitted or executed in a different order.

[0151] At box 1510, the BS sends a first configuration to the UE for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first SCS.

[0152] At box 1520, the BS sends a second configuration to the UE for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS.

[0153] At box 1530, the BS sends a third configuration to the UE, which indicates a third SCS associated with the number of DCI BDs in the first and second search spaces, wherein the third SCS corresponds to one of the first or second SCSs. In one aspect, sending the third configuration indicating the third SCS includes sending an RRC configuration including the third configuration to the UE.

[0154] At box 1540, the BS sends the DCI from at least one of the first search space or the second search space to the UE based on the number of DCI BDs.

[0155] In some respects, method 1500 also includes determining the number of DCI BDs based on the capabilities of the third SCS and UE.

[0156] This disclosure also includes the following aspects: 1. A method for wireless communication performed by a user equipment (UE), the method comprising: Receives a first configuration for scheduling in a first cell from a base station (BS), wherein the first configuration is associated with a first search space in the first cell and wherein the first cell is associated with a first subcarrier spacing (SCS); The BS receives a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; The number of blind detections (BD) is determined based on at least one of the first SCS or the second SCS; and Based on the number of BDs, downlink control information (DCI) is monitored in the first search space and the second search space. 2. The method according to claim 1, wherein determining the number of BDs includes: Select the lower SCS between the first SCS and the second SCS; and The number of BDs is determined based on the configuration associated with the lower SCS. 3. The method according to claim 1, wherein determining the number of BDs includes: Select the higher SCS between the first SCS and the second SCS; and The number of BDs is determined based on the configuration associated with the higher SCS. 4. The method according to claim 1, further comprising: The BS receives a Radio Resource Control (RRC) configuration indicating a third SCS, wherein the third SCS corresponds to either the first SCS or the second SCS. The determination of the number of BDs is further based on the third SCS. 5. The method according to any one of claims 1-4, wherein monitoring the DCI comprises: Execute a first subset of the BD in the first search space; and The second subset of the BD is executed in the second search space. 6. The method according to any one of claims 1-5, wherein monitoring the DCI comprises: Determine whether the total number of DCI candidates in the first search space and the second search space exceeds the number of BDs; and In response to the determination that the total number of DCI candidates exceeds the number of BDs, the first search space or the second search space is excluded from the monitoring based on the search space identifiers associated with the first search space and the second search space. 7. The method of claim 6, wherein the at least one in the first search space includes a first plurality of search spaces, or the second search space includes a second plurality of search spaces, and wherein monitoring the DCI includes: The total number of DCI candidates in at least one of the first plurality of search spaces or the second plurality of search spaces exceeds the number of BDs; In response to determining that the total number of DCI candidates exceeds the number of BDs, one or more search spaces are excluded from at least one of the first plurality of search spaces or the second plurality of search spaces based on the cell identifier associated with the one or more search spaces; and Further, based on the search space identifier associated with the one or more other search spaces, one or more other search spaces are excluded from at least one of the first plurality of search spaces or the second plurality of search spaces. 8. The method according to any one of claims 1-7, wherein the first configuration indicates a first monitoring period, and wherein the second configuration indicates a second monitoring period different from the first monitoring period, and wherein determining the number of BDs is further based on at least one of the following: the first monitoring period, the first SCS, the second monitoring period, or the first SCS. 9. A method for wireless communication performed by a base station (BS), the method comprising: Send a first configuration for scheduling in a first cell to a user equipment (UE), wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); Send a second configuration to the UE for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; Sending a third configuration to the UE indicating a third SCS associated with the number of downlink control information (DCI) blind detections (BD) in the first search space and the second search space, wherein the third SCS corresponds to one of the first SCS or the second SCS; and Based on the number of DCI BDs, DCI is sent to the UE in at least one of the first search space or the second search space. 10. The method according to claim 9, further comprising: The number of DCI BDs is determined based on the capabilities of the third SCS and the UE. 11. The method according to any one of claims 9 or 10, wherein sending the third configuration indicating the third SCS comprises: sending a radio resource control (RRC) configuration including the third configuration to the UE. 12. A user equipment (UE), comprising: The transceiver is configured as follows: Receives a first configuration for scheduling in a first cell from a base station (BS), wherein the first configuration is associated with a first search space in the first cell and wherein the first cell is associated with a first subcarrier spacing (SCS); Receives from the BS a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; and The processor, configured as follows: The number of blind detections (BD) is determined based on at least one of the first SCS or the second SCS; and Based on the number of BDs, downlink control information (DCI) is monitored in the first search space and the second search space. 13. The UE of claim 12, wherein the processor is configured to determine the number of BDs, and the processor is configured to perform the following operations: Select the lower SCS between the first SCS and the second SCS; and The number of BDs is determined based on the configuration associated with the lower SCS. 14. The UE of claim 12, wherein the processor is configured to determine the number of BDs, and the processor is configured to perform the following operations: Select the higher SCS between the first SCS and the second SCS; and The number of BDs is determined based on the configuration associated with the higher SCS. 15. The UE according to claim 12, wherein the transceiver is further configured to: The BS receives a Radio Resource Control (RRC) configuration indicating a third SCS, wherein the third SCS corresponds to either the first SCS or the second SCS. The processor is configured to determine the number of BDs, including the processor being configured to determine the number of BDs based on the third SCS. 16. The UE according to any one of claims 12-15, wherein the processor is configured to monitor the DCI, the processor is configured to perform the following operations: Execute a first subset of the BD in the first search space; and The second subset of the BD is executed in the second search space. 17. The UE according to any one of claims 12-16, wherein the processor is configured to monitor the DCI, and the processor is configured to perform the following operations: Determine whether the total number of DCI candidates in the first search space and the second search space exceeds the number of BDs; and In response to the determination that the total number of DCI candidates exceeds the number of BDs, the first search space or the second search space is excluded from the monitoring based on the search space identifiers associated with the first search space and the second search space. 18. The UE of claim 17, wherein the at least one of the first search spaces includes a first plurality of search spaces, or the second search space includes a second plurality of search spaces, and wherein the processor is configured to monitor the DCI, the processor is configured to perform the following operations: The total number of DCI candidates in at least one of the first plurality of search spaces or the second plurality of search spaces exceeds the number of BDs; In response to determining that the total number of DCI candidates exceeds the number of BDs, one or more search spaces are excluded from at least one of the first plurality of search spaces or the second plurality of search spaces based on the cell identifier associated with the one or more search spaces; and Further, based on the search space identifier associated with the one or more other search spaces, one or more other search spaces are excluded from at least one of the first plurality of search spaces or the second plurality of search spaces. 19. The UE according to any one of claims 12-18, wherein the first configuration indicates a first monitoring period, and wherein the second configuration indicates a second monitoring period different from the first monitoring period, and wherein the processor is configured to determine the number of BDs by: the processor being configured to determine the number of BDs based on at least one of the following: the first monitoring period, the first SCS, the second monitoring period, or the first SCS. 20. A base station (BS), comprising: The transceiver is configured as follows: Send a first configuration for scheduling in a first cell to a user equipment (UE), wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); Send a second configuration to the UE for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; Sending a third configuration to the UE indicating a third SCS associated with the number of downlink control information (DCI) blind detections (BD) in the first search space and the second search space, wherein the third SCS corresponds to one of the first SCS or the second SCS; and Based on the number of DCI BDs, DCI is sent to the UE in at least one of the first search space or the second search space. 21. The BS according to claim 20 further includes a processor configured as follows: The number of DCI BDs is determined based on the capabilities of the third SCS and the UE. 22. The BS according to any one of claims 20 or 21, wherein the transceiver is configured to transmit the third configuration indicating the third SCS, comprising: the transceiver being configured to transmit a radio resource control (RRC) configuration including the third configuration to the UE. 23. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising: Code for enabling a user equipment (UE) to receive from a base station (BS) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); Code for enabling the UE to receive from the BS a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; Code for enabling the UE to determine the number of blind detections (BD) based on at least one of the first SCS or the second SCS; and Code for enabling the UE to monitor downlink control information (DCI) in the first search space and the second search space based on the number of BDs. 24. The non-transitory computer-readable medium of claim 23, wherein the code for enabling the UE to determine the number of BDs comprises: Code for enabling the UE to select a lower SCS between the first SCS and the second SCS; and Code used to enable the UE to determine the number of BDs based on the configuration associated with the lower SCS. 25. The non-transitory computer-readable medium of claim 23, wherein the code for causing the UE to determine the number of BDs comprises: Code for enabling the UE to select a higher SCS between the first SCS and the second SCS; and Code used to enable the UE to determine the number of BDs based on the configuration associated with the higher SCS. 26. The non-transitory computer-readable medium according to claim 23, wherein the program code further comprises: Code used to enable the UE to receive from the BS a radio resource control (RRC) configuration indicating a third SCS, wherein the third SCS corresponds to either the first SCS or the second SCS. The code used to enable the UE to determine the number of BDs includes: code used to enable the UE to determine the number of BDs based on the third SCS. 27. The non-transitory computer-readable medium according to any one of claims 23-26, wherein the code for enabling the UE to monitor the DCI comprises: Code for enabling the UE to execute a first subset of the BD in the first search space; and Code used to enable the UE to execute a second subset of the BD in the second search space. 28. The non-transitory computer-readable medium according to any one of claims 23-27, wherein the code for enabling the UE to monitor the DCI comprises: Code used to enable the UE to determine whether the total number of DCI candidates in the first search space and the second search space exceeds the number of BDs; and Code for causing the UE to exclude either the first search space or the second search space from the monitoring based on search space identifiers associated with the first search space and the second search space in response to determining that the total number of DCI candidates exceeds the number of BDs. 29. The non-transitory computer-readable medium of claim 28, wherein the at least one of the first search spaces comprises a first plurality of search spaces, or the second search space comprises a second plurality of search spaces, and wherein the code for enabling the UE to monitor the DCI comprises: Code used to enable the UE to determine that the total number of DCI candidates in at least one of the first plurality of search spaces or the second plurality of search spaces exceeds the number of BDs; Code for causing the UE to exclude one or more search spaces from at least one of the first plurality of search spaces or the second plurality of search spaces based on a cell identifier associated with the one or more search spaces in response to determining that the total number of DCI candidates exceeds the number of BDs; and Code for enabling the UE to further exclude one or more other search spaces from at least one of the first plurality of search spaces or the second plurality of search spaces based on search space identifiers associated with the one or more other search spaces. 30. The non-transitory computer-readable medium according to any one of claims 23-29, wherein the first configuration indicates a first monitoring period, and wherein the second configuration indicates a second monitoring period different from the first monitoring period, and wherein the code for causing the UE to determine the number of BDs includes code for causing the UE to determine the number of BDs based on at least one of: the first monitoring period, the first SCS, the second monitoring period, or the first SCS. 31. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising: Code for causing a base station (BS) to send a first configuration for scheduling in a first cell to a user equipment (UE), wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); Code for causing the BS to send a second configuration for scheduling in the first cell to the UE, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; Code for causing the BS to send to the UE a third configuration of a third SCS associated with the number of downlink control information (DCI) blind detections (BD) in the first search space and the second search space, wherein the third SCS corresponds to one of the first SCS or the second SCS; and Code for enabling the BS to send DCI to the UE in at least one of the first search space or the second search space, based on the DCI BD quantity. 32. The non-transitory computer-readable medium according to claim 31, wherein the program code further comprises: Code used to enable the BS to determine the number of DCI BDs based on the capabilities of the third SCS and the UE. 33. The non-transitory computer-readable medium according to any one of claims 31 or 32, wherein the code for causing the BS to send the third configuration indicating the third SCS comprises: code for causing the BS to send to the UE a radio resource control (RRC) configuration including the third configuration. 34. A user equipment (UE), comprising: A unit for receiving from a base station (BS) a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); A unit for receiving from the BS a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; A unit for determining the number of blind detections (BD) based on at least one of the first SCS or the second SCS; and A unit for monitoring downlink control information (DCI) in the first search space and the second search space based on the number of BDs. 35. The UE according to claim 34, wherein the unit for determining the number of BDs comprises: A unit for selecting a lower SCS between the first SCS and the second SCS; and Units used to determine the number of BDs based on the configuration associated with the lower SCS. 36. The UE according to claim 34, wherein the unit for determining the number of BDs comprises: A unit for selecting a higher SCS between the first SCS and the second SCS; and Units used to determine the number of BDs based on the configuration associated with the higher SCS. 37. The UE according to claim 34, further comprising: A unit for receiving from the BS a radio resource control (RRC) configuration indicating a third SCS, wherein the third SCS corresponds to either the first SCS or the second SCS. The unit for determining the number of BDs includes: a unit for determining the number of BDs based on the third SCS. 38. The UE according to any one of claims 34-37, wherein the unit for monitoring the DCI comprises: Units for executing a first subset of the BD in the first search space; and Units for performing a second subset of the BD in the second search space. 39. The UE according to any one of claims 34-38, wherein the unit for monitoring the DCI comprises: A unit for determining whether the total number of DCI candidates in the first search space and the second search space exceeds the number of BDs; and A unit for excluding either the first search space or the second search space from the monitoring based on search space identifiers associated with the first search space and the second search space in response to determining that the total number of DCI candidates exceeds the number of BDs. 40. The UE of claim 39, wherein the at least one of the first search spaces includes a first plurality of search spaces, or the second search space includes a second plurality of search spaces, and wherein the unit for monitoring the DCI includes: A unit for determining that the total number of DCI candidates in at least one of the first plurality of search spaces or the second plurality of search spaces exceeds the number of BDs; A unit for excluding one or more search spaces from at least one of the first plurality of search spaces or the second plurality of search spaces based on a cell identifier associated with the one or more search spaces in response to determining that the total number of DCI candidates exceeds the number of BDs; and A unit for further excluding one or more other search spaces from the first plurality of search spaces or the second plurality of search spaces based on search space identifiers associated with the one or more other search spaces. 41. The UE according to claims 34-40, wherein the first configuration indicates a first monitoring period, and wherein the second configuration indicates a second monitoring period different from the first monitoring period, and wherein the unit for determining the number of BDs includes a unit for determining the number of BDs based on at least one of the following: the first monitoring period, the first SCS, the second monitoring period, or the first SCS. 42. A base station (BS), comprising: A unit for sending a first configuration for scheduling in a first cell to a user equipment (UE), wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS); A unit for sending a second configuration for scheduling in the first cell to the UE, wherein the second configuration is associated with a second search space in a second cell different from the first cell, and wherein the second cell is associated with a second SCS different from the first SCS; A unit for transmitting to the UE a third configuration of a third SCS associated with the number of downlink control information (DCI) blind detections (BD) in the first search space and the second search space, wherein the third SCS corresponds to one of the first SCS or the second SCS; and A unit for sending DCI to the UE in at least one of the first search space or the second search space based on the number of DCI BDs. 43. The BS according to claim 42, further comprising: Units used to determine the number of DCI BDs based on the capabilities of the third SCS and the UE. 44. The method according to any one of claims 42 or 43, wherein the unit for transmitting the third configuration indicating the third SCS comprises: a unit for transmitting to the UE a radio resource control (RRC) configuration including the third configuration.

[0157] Information and signals can be represented using any of a variety of different techniques and methods. For example, the data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0158] A general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any combination thereof, used to perform the functions described herein, may be used to implement or execute the various exemplary blocks and modules described in conjunction with the disclosure herein. The general-purpose processor may be a microprocessor, or it may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, several microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration).

[0159] The functions described herein can be implemented in hardware, processor-executed software, firmware, or any combination thereof. When implemented in processor-executed software, these functions can be stored on a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations also fall within the scope of this disclosure and its appended claims. For example, due to the nature of software, the functions described above can be implemented using processor-executed software, hardware, firmware, hardware wiring, or any combination thereof. Features used to implement the functions can be physically located in multiple locations, including distributed ones, such that portions of the functions are implemented in different physical locations. Furthermore, as used herein (including the claims), the word "or" as used in a list item (e.g., "or" used in list items ending with phrases such as "at least one of" or "one or more of") indicates an inclusive list, such that, for example, the list [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).

[0160] As will be understood by those skilled in the art, many improvements, substitutions, and changes can be made to the materials, apparatus, structure, and methods of use of the devices disclosed herein, depending on the specific application at the time, without departing from the spirit and scope of this disclosure. Therefore, the scope of this disclosure should not be limited to the specific embodiments shown and described herein, as they are merely illustrative in nature, but should be fully commensurate with the appended claims and their functional equivalents.

Claims

1. A method for wireless communication performed by a user equipment (UE), the method comprising: Receive a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS) configuration; Receive a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in the second cell, and wherein the second cell is associated with a second SCS configuration; and Based on the number of blind detections (BDs), downlink control information (DCI) is monitored in the second search space, wherein the number of BDs is based on at least one of the first SCS configuration or the second SCS configuration, and wherein the monitoring includes: The second search space, instead of the first search space, is allocated for the monitoring so that the total number of DCI candidates in the first and second search spaces does not exceed the number of BDs, and wherein the allocation is based on a search space identifier associated with the second search space.

2. The method according to claim 1, wherein, The number of BDs is based on the selection of the first SCS configuration or the second SCS configuration according to the lower SCS between the first SCS configuration and the second SCS configuration.

3. The method according to claim 1, wherein, The number of BDs is based on the selection of the first SCS configuration or the second SCS configuration according to the higher SCS between the first SCS configuration and the second SCS configuration.

4. The method according to claim 1, further comprising: Receive a Radio Resource Control (RRC) configuration indicating a third SCS configuration, wherein the third SCS configuration corresponds to either the first SCS configuration or the second SCS configuration. The number of BDs is also based on the third SCS configuration.

5. The method according to claim 1, wherein, The monitoring of the DCI includes: A subset of the BD is executed in the second search space.

6. The method according to claim 1, wherein, At least one of the following: the first search space includes a first plurality of search spaces, or the second search space includes a second plurality of search spaces, and wherein monitoring the DCI includes: The total number of DCI candidates in at least one of the first plurality of search spaces or the second plurality of search spaces exceeds the number of BDs; In response to determining that the total number of DCI candidates in at least one of the first plurality of search spaces or the second plurality of search spaces exceeds the number of BDs, the one or more search spaces are excluded from the at least one of the first plurality of search spaces or the second plurality of search spaces based on the cell identifier associated with the one or more search spaces; and Further, based on search space identifiers associated with one or more other search spaces, the one or more other search spaces are excluded from at least one of the first plurality of search spaces or the second plurality of search spaces.

7. The method according to claim 1, wherein, The first configuration indicates a first monitoring period, and the second configuration indicates a second monitoring period different from the first monitoring period, and the number of BDs is further based on at least one of the following: the first monitoring period, the first SCS configuration, the second monitoring period, or the second SCS configuration.

8. The method according to claim 1, wherein: The first cell is the primary cell (Pcell), and the second cell is the secondary cell (Scell). The first SCS configuration is smaller than the second SCS configuration; and The number of BDs is based on the configuration of the first SCS.

9. A user equipment (UE), comprising: One or more memory units; as well as One or more processors, coupled to the one or more memories, and configured to: Receive a first configuration for scheduling in a first cell, wherein the first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS) configuration; Receive a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in the second cell, and wherein the second cell is associated with a second SCS configuration; and Downlink control information (DCI) is monitored in the second search space based on the number of blind detections (BDs), wherein the number of BDs is based on at least one of the first SCS configuration or the second SCS configuration, and wherein, in order to monitor the DCI, the one or more processors are further configured to: The second search space, instead of the first search space, is allocated for the monitoring so that the total number of DCI candidates in the first and second search spaces does not exceed the number of BDs, and wherein the allocation is based on a search space identifier associated with the second search space.

10. The UE according to claim 9, wherein, The number of BDs is based on the selection of the first SCS configuration or the second SCS configuration according to the lower SCS between the first SCS configuration and the second SCS configuration.

11. The UE according to claim 9, wherein, The number of BDs is based on the selection of the first SCS configuration or the second SCS configuration according to the higher SCS between the first SCS configuration and the second SCS configuration.

12. The UE according to claim 9, wherein, The one or more processors are further configured to: Receive a Radio Resource Control (RRC) configuration indicating a third SCS configuration, wherein the third SCS configuration corresponds to either the first SCS configuration or the second SCS configuration. The number of BDs is also based on the third SCS configuration.

13. The UE according to claim 9, wherein, In order to monitor the DCI, the one or more processors are further configured to: A subset of the BD is executed in the second search space.

14. The UE according to claim 9, wherein, At least one of the following: the first search space includes a first plurality of search spaces, or the second search space includes a second plurality of search spaces, and wherein, in order to monitor the DCI, the one or more processors are further configured to: The total number of DCI candidates in at least one of the first plurality of search spaces or the second plurality of search spaces exceeds the number of BDs; In response to determining that the total number of DCI candidates in at least one of the first plurality of search spaces or the second plurality of search spaces exceeds the number of BDs, the one or more search spaces are excluded from the at least one of the first plurality of search spaces or the second plurality of search spaces based on the cell identifier associated with the one or more search spaces; and Further, based on search space identifiers associated with one or more other search spaces, the one or more other search spaces are excluded from at least one of the first plurality of search spaces or the second plurality of search spaces.

15. The UE according to claim 9, wherein, The first configuration indicates a first monitoring period, and the second configuration indicates a second monitoring period different from the first monitoring period, and the number of BDs is further based on at least one of the following: the first monitoring period, the first SCS configuration, the second monitoring period, or the second SCS configuration.

16. The UE according to claim 9, wherein: The first cell is the primary cell (Pcell), and the second cell is the secondary cell (Scell). The first SCS configuration is smaller than the second SCS configuration; and The number of BDs is based on the configuration of the first SCS.

17. A non-transitory computer-readable medium storing an instruction set, the instruction set comprising one or more instructions, which, when executed by one or more processors of a user equipment (UE), cause the UE to perform the following operations: Receive a first configuration for scheduling in the first cell, wherein... The first configuration is associated with a first search space in the first cell, and wherein the first cell is associated with a first subcarrier spacing (SCS) configuration; Receive a second configuration for scheduling in the first cell, wherein the second configuration is associated with a second search space in the second cell, and wherein the second cell is associated with a second SCS configuration; and Based on the number of blind detections (BDs), downlink control information (DCI) is monitored in the second search space, wherein the number of BDs is based on at least one of the first SCS configuration or the second SCS configuration, and wherein, in order to monitor the DCI, the instruction further causes the UE to perform the following operations: The second search space, instead of the first search space, is allocated for the monitoring so that the total number of DCI candidates in the first and second search spaces does not exceed the number of BDs, and wherein the allocation is based on a search space identifier associated with the second search space.

18. The non-transitory computer-readable medium according to claim 17, wherein, The number of BDs is based on the selection of the first SCS configuration or the second SCS configuration according to the lower SCS between the first SCS configuration and the second SCS configuration.

19. The non-transitory computer-readable medium according to claim 17, wherein, The number of BDs is based on the selection of the first SCS configuration or the second SCS configuration according to the higher SCS between the first SCS configuration and the second SCS configuration.

20. The non-transitory computer-readable medium according to claim 17, wherein, The instruction also causes the UE to perform the following operations: Receive a Radio Resource Control (RRC) configuration indicating a third SCS configuration, wherein the third SCS configuration corresponds to either the first SCS configuration or the second SCS configuration. The number of BDs is also based on the third SCS configuration.

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