Techniques for PDCCH monitoring aggregation

Abstract

A wireless communication system and method are provided for a downlink search space with or without PDCCH monitoring aggregation in a wireless communication network. A UE receives a monitoring configuration from a BS, the monitoring configuration including repetition of DCI over multiple PDCCH monitoring occasions in the search space. The monitoring configuration indicates one or more forms of diversity among the PDCCH monitoring occasions. Diversity may be achieved, for example, by CORESET frequency allocation differences, PDCCH monitoring occasion frequency resource allocation differences, and / or different hashing functions for CCE indices of PDCCH monitoring occasions within the CORESET. Additional diversity is possible by using different beams and other methods. Once activated, either explicitly or implicitly, the UE monitors for PDCCH transmissions from a first device utilizing the configured PDCCH monitoring aggregation.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to and the benefit of U.S. Patent Application No. 17 / 357,387, filed June 24, 2021, and U.S. Provisional Patent Application No. 63 / 044,752, filed June 26, 2020, and U.S. Provisional Patent Application No. 63 / 044,866, filed June 26, 2020, and U.S. Provisional Patent Application No. 63 / 045,572, filed June 29, 2020, the disclosures of which are incorporated by reference herein in their entireties as if fully set forth below and for all applicable purposes.

[0002] The present application relates to wireless communication systems, and more particularly to improved downlink control channel communication in wireless communication networks. [Background technology]

[0003] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasts, etc. These systems may be capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless multiple-access communication system may include several base stations (BSs), each simultaneously supporting communication for multiple communication devices, which may sometimes be known as user equipment (UE).

[0004] To meet the growing demand for enhanced mobile broadband connectivity, wireless communications technology is evolving from Long Term Evolution (LTE) technology to Next Generation Radio (NR) technology. NR is designed to provide lower latency, higher bandwidth or throughput, and higher reliability than LTE. NR is designed to operate across a wide range of spectrum bands, from low-frequency bands below approximately 1 gigahertz (GHz) and intermediate-frequency bands from approximately 1 GHz to approximately 6 GHz, to high-frequency bands such as millimeter wave (mmWave) bands. NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed spectrum and shared spectrum. Spectrum sharing allows operators to opportunistically aggregate spectrum to dynamically support high-bandwidth services. Spectrum sharing can extend the benefits of NR technology to operating entities that may not have access to licensed spectrum.

[0005] In wireless communication networks, a search space refers to a time-frequency region within a transmission slot in which downlink (DL) control information is carried. The search space is typically located at the beginning of the transmission slot. Under some conditions, the DL control channel may be unreliable, which may affect the robustness of the network. Therefore, there is a need to provide a method for ensuring that DL control information is transmitted in a more robust manner that can adapt to changing channel quality, such as by improving one or more frequency characteristics of the channel. Summary of the Invention [Means for solving the problem]

[0006] The following summarizes some aspects of the present disclosure in order to provide a basic understanding of the described technology. This summary is not an extensive overview of all contemplated features of the present disclosure, nor does it identify key or critical elements of all aspects of the present disclosure, nor does it delineate the scope of any or all aspects of the present disclosure. Its sole purpose is to present some concepts of one or more aspects of the present disclosure in summary form as a prelude to the more detailed description that is presented later.

[0007] For example, in one aspect of the present disclosure, a method of wireless communication includes receiving, by a user equipment (UE), a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The method further includes monitoring, by the UE, a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions based on the monitoring configuration.

[0008] In an additional aspect of the present disclosure, a method of wireless communication includes transmitting, by a base station (BS), a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The method further includes indicating, by the BS to a UE based on the monitoring configuration, to commence monitoring of a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The method further includes transmitting, by the BS to the UE, a PDCCH transmission in at least one of the first CORESET and the second CORESET.

[0009] In an additional aspect of the present disclosure, a first wireless communication device includes a transceiver configured to receive from a second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to each monitoring occasion from a plurality of monitoring occasions, the first and second CORESETs being different from one another. The wireless communication device further includes a transceiver configured to receive from the second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to each monitoring occasion from the plurality of monitoring occasions, the first and second CORESETs being different from one another.

[0010] In an additional aspect of the present disclosure, the first wireless communication device includes a transceiver configured to transmit a monitoring configuration to a second wireless communication device, the monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The transceiver is further configured to indicate to the second wireless communication device, based on the monitoring configuration, to begin monitoring a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The transceiver is further configured to transmit a PDCCH transmission in at least one of the first CORESET and the second CORESET.

[0011] In an additional aspect of the present disclosure, a non-transitory computer-readable medium has program code recorded thereon, the program code including code for causing a first wireless communication device to receive from a second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to monitor a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions based on the monitoring configuration.

[0012] In an additional aspect of the present disclosure, a non-transitory computer-readable medium has program code recorded thereon, the program code including code for causing a first wireless communication device to transmit to a second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, wherein the first and second CORESETs are different from each other. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to indicate to the second wireless communication device, based on the monitoring configuration, to begin monitoring a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to transmit a PDCCH transmission in at least one of the first CORESET and the second CORESET.

[0013] In an additional aspect of the present disclosure, a first wireless communication device comprises means for receiving from a second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The first wireless communication device further comprises means for monitoring a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions based on the monitoring configuration.

[0014] In an additional aspect of the present disclosure, a first wireless communication device comprises means for transmitting a monitoring configuration to a second wireless communication device, the monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The first wireless communication device further comprises means for indicating to the second wireless communication device, based on the monitoring configuration, to begin monitoring a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The first wireless communication device further comprises means for transmitting PDCCH transmissions in at least one of the first CORESET and the second CORESET to the second wireless communication device.

[0015] Other aspects, features, and embodiments will become apparent to those skilled in the art upon reviewing the following description of certain exemplary embodiments in conjunction with the accompanying figures. While features may be described in conjunction with certain embodiments and figures below, all embodiments may include one or more of the advantageous features described herein. In other words, while one or more embodiments may be described as having certain advantageous features, one or more of such features may also be used in accordance with various embodiments described herein. Similarly, while exemplary embodiments may be described below as device embodiments, system embodiments, or method embodiments, it should be understood that such exemplary embodiments may be implemented in a variety of devices, systems, and methods. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 illustrates a wireless communication network in accordance with some embodiments of the present disclosure. [Figure 2] 1 illustrates a transmission frame for a communication network in accordance with some embodiments of the present disclosure. [Figure 3] 1 illustrates a transmission frame for a communication network in accordance with some embodiments of the present disclosure. [Figure 4] FIG. 1 is a block diagram of a user equipment (UE) in accordance with some embodiments of the present disclosure. [Figure 5] FIG. 1 is a block diagram of an exemplary base station (BS) in accordance with some embodiments of the present disclosure. [Figure 6] 1 is a signaling diagram of a scheme for multi-CORESET monitoring according to some embodiments of the present disclosure. [Figure 7] 1 is a signaling diagram of a scheme for multi-CORESET monitoring according to some embodiments of the present disclosure. [Figure 8] FIG. 2 is a signaling diagram of a scheme for multi-CORESET monitoring with multiple devices, according to some embodiments of the present disclosure. [Figure 9]1 is a flow diagram of a wireless communication method according to some embodiments of the present disclosure. [Figure 10] 1 is a flow diagram of a wireless communication method according to some embodiments of the present disclosure. [Figure 11] 1 is a flow diagram of a wireless communication method according to some embodiments of the present disclosure. [Figure 12] FIG. 1 is a diagram of an example resource structure for wireless communication in accordance with certain embodiments of the present disclosure. [Figure 13] FIG. 1 is an example diagram associated with a technique for DL ​​monitoring with diversity, in accordance with some embodiments of the present disclosure. [Figure 14] FIG. 1 is an example diagram associated with a technique for DL ​​monitoring with diversity, in accordance with some embodiments of the present disclosure. [Figure 15] 1 is a flow diagram of a wireless communication method according to some embodiments of the present disclosure. [Figure 16] 1 is a flow diagram of a wireless communication method according to some embodiments of the present disclosure. [Figure 17] 1 is a flow diagram of a wireless communication method according to some embodiments of the present disclosure. [Figure 18] 1 is a flow diagram of a wireless communication method according to some embodiments of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0017] The detailed description set forth below with reference to the accompanying drawings describes various configurations and does not represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0018] The present disclosure generally relates to wireless communication systems, also referred to as wireless communication networks. In various embodiments, the techniques and apparatus may 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, Fifth Generation (5G) or New Radio (NR) networks, and other communication networks. The terms "network" and "system" described herein may be used interchangeably.

[0019] An OFDMA network may implement radio technologies such as Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, orthogonal frequency division multiplexing (OFDM), etc. UTRA, E-UTRA, and GSM are parts of the Universal Mobile Telecommunications System (UMTS). Specifically, LTE is a release of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents from an organization named "3rd Generation Partnership Project" (3GPP®), and cdma2000 is described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP®2). These various radio technologies and standards are known or are under development. For example, the 3rd Generation Partnership Project (3GPP®) is a collaboration between groups at the Telecommunications Institute aimed at defining 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® may define specifications for the next generation of mobile networks, mobile systems, and mobile devices. This disclosure relates to wireless technology evolution from LTE, 4G, 5G, NR, and beyond, which involves shared access to the wireless spectrum among networks using a range of new and different radio access technologies or radio air interfaces.

[0020] Specifically, 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that can be implemented using an OFDM-based unified air interface. To achieve these goals, further enhancements to LTE and LTE-A are being considered, in addition to the development of new radio technologies for 5G NR networks. 5G NR is expected to achieve: (1) ultra-high density (e.g., approximately 1 million nodes / km); 2), ultra-low complexity (e.g., on the order of tens of bits per second), ultra-low energy (e.g., on the order of 10 years of battery life), and deep coverage with the ability to reach difficult locations; (2) to the Massive Internet of Things (IoT), with strong security to protect sensitive personal, financial, or confidential information, ultra-high reliability (e.g., on the order of 99.9999% reliability), ultra-low latency (e.g., on the order of 1 ms), and mission-critical control with users having a wide range or lack of mobility; and (3) extremely high capacity (e.g., on the order of 10 Tbps / km 2 ), extreme data rates (e.g., multi-Gbps rates, user experience rates of 100Mbps or more), and enhanced mobile broadband, including a deep understanding of advanced discovery and optimization.

[0021] 5G NR has a common, flexible framework for efficiently multiplexing services and features using dynamic, low-latency time division duplexing (TDD) / frequency division duplexing (FDD) designs with scalable numerology and transmission time intervals (TTIs), and may be implemented using optimized OFDM-based waveforms with advanced wireless technologies such as massive multiple-input multiple-output (MIMO), robust millimeter wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of numerology in 5G NR, along with the scaling of subcarrier spacing, can efficiently address the operation of diverse services across diverse spectrum and diverse deployments. For example, in various outdoor macro-coverage deployments of sub-3 GHz FDD / TDD implementations, subcarrier spacing may occur at 15 kHz across bandwidths (BW) of 1, 5, 10, 20 MHz, etc. For various other outdoor small cell coverage deployments with TDD over 3 GHz, subcarrier spacing may occur at 30 kHz over 80 / 100 MHz BW. For various other indoor wideband implementations using TDD over the unlicensed portion of the 5 GHz band, subcarrier spacing may occur at 60 kHz over 160 MHz BW. Finally, for various deployments transmitting with an mmWave component at 28 GHz TDD, subcarrier spacing may occur at 120 kHz over 500 MHz BW.

[0022] 5G NR's scalable numerology facilitates scalable TTIs for diverse latency and quality of service (QoS) requirements. For example, shorter TTIs may be used for low latency and high reliability, while longer TTIs may be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmissions to start on symbol boundaries. 5G NR also contemplates a self-contained, integrated subframe design with uplink / downlink scheduling information, data, and acknowledgments within the same subframe. The self-contained, integrated subframe supports communication in unlicensed or contention-based shared spectrum, adaptive uplink / downlink that can be flexibly configured per cell to dynamically switch between uplink and downlink to meet current traffic needs.

[0023] Various other aspects and features of the present disclosure are further described below. It will be apparent that the teachings herein may be embodied in a wide variety of forms, and that any specific structure, function, or both disclosed herein is merely representative and not limiting. Based on the teachings herein, those skilled in the art will appreciate that an aspect disclosed herein can be implemented independently of any other aspect, and that two or more of these aspects can be combined in various ways. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects described herein. In addition, such an apparatus may be implemented or such a method may be practiced using other structure, function, or structure and function in addition to or other than one or more of the aspects described herein. For example, a method may 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. Furthermore, an aspect may include at least one element of a claim.

[0024] The communication may be in the form of a radio frame. The radio frame may be divided into multiple subframes, which may be divided into one or more slots. Each slot may be further divided into minislots. At the smallest level (e.g., within a slot), a resource element (RE) comprises a single subcarrier in the frequency domain and a single OFDM symbol in the time domain. A resource element group (REG) may consist of several REs (e.g., 12) within a single OFDM symbol. A control channel element (CCE) comprises a group of REGs.

[0025] In NR, the PDCCH is transmitted via a control resource set (CORESET). A CORESET is a set of CCEs used to carry the PDCCH transmission, e.g., 1, 2, 4, 8, or 16 CCEs. A CORESET is generally restricted to span less than the entire frequency range of a radio frame. Each CORESET has an associated CCE-REG mapping. Frequencies within a CORESET may be contiguous or non-contiguous. A CORESET may span one or more OFDM symbol time periods.

[0026] A set of potential PDCCH candidates is called a search space, which is associated with a CORESET and can have defined, configurable monitoring occasions. The BS may configure the UE with one or more search spaces for PDCCH monitoring based on a predefined CORESET. The UE may perform blind decoding in the search space to search for DL ​​control information from the BS. For example, the BS may configure the UE with a BWP, a CORESET, and / or a PDCCH search space via RRC configuration.

[0027] This application describes mechanisms for providing multiple monitoring occasions associated with different CORESETs within a search space. The CORESETs associated with different monitoring occasions may have different frequency allocations, different CCE-REG mappings, different REG bundling, and / or different transmission configuration indicator (TCI) states (i.e., associated with different beams). Through mechanisms such as RRC configuration, multiple CORESETs may be pre-configured and associated with different monitoring occasions of the search space.

[0028] Multi-CORESET monitoring may be activated in several ways. For example, multi-CORESET monitoring may be through a semi-static configuration such as an RRC configuration and / or a dynamic configuration such as a MAC CE, a UE-specific downlink control information (DCI), or a group-common DCI. In addition, multi-CORESET monitoring may be implicitly activated when some other criteria are met, for example, activation of PDCCH monitoring aggregation. PDCCH monitoring aggregation, as used herein, refers to a single PDCCH being repeated across multiple CORESETs to create a larger virtual CORESET.

[0029] The applicability of multi-CORESET monitoring with or without monitoring aggregation may be conditional on several parameters. For example, multi-CORESET monitoring may be conditional on the size of the CORESET in terms of either the number of RBs and / or the number of OFDM symbols. As another example, multi-CORESET monitoring may be conditional on the available frequency range. As a further example, multi-CORESET monitoring may be conditional on the subcarrier spacing. As another example, multi-CORESET monitoring may be conditional on the type of search space (e.g., UE-specific search space or common search space). These are just a few examples. Multi-CORESET may be conditional on any one or more of such examples (e.g., a subset or all of them).

[0030] Aspects of the present disclosure may provide several benefits. For example, configuring a UE to monitor for PDCCHs whose CORESETs cover different frequency ranges can provide frequency diversity. Such frequency diversity can help make communications more robust because any frequency-dependent weaknesses in the channel can be mitigated. Similarly, differences in CCE-REG mapping or REG bundling can introduce diversity into the signal. By varying the TCI state (and thereby the associated beam) between CORESETs, beam diversity can alternatively be introduced and / or can also be introduced. Beam diversity can increase the robustness of transmitting PDCCHs to the UE. Further improvements can be realized when PDCCH monitoring aggregation is used in conjunction with multi-CORESET monitoring. By aggregating repetitions of the same PDCCH over CORESETs with different parameters, that PDCCH transmission becomes more robust with additional power.

[0031] FIG. 1 illustrates a wireless communication network 100 according to some aspects of the present disclosure. The network 100 may be a 5G network. The network 100 includes several base stations (BSs) 105 (individually labeled 105a, 105b, 105c, 105d, 105e, and 105f) and other network entities. The BSs 105 may be stations that communicate with UEs 115 and may also be referred to as evolved Node Bs (eNBs), next-generation eNBs (gNBs), access points, etc. Each BS 105 may provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to this particular geographic coverage area of ​​the BS 105 and / or the BS subsystem serving the coverage area, depending on the context in which the term is used.

[0032] The BS 105 may provide communication coverage for macrocells, or small cells such as picocells or femtocells, and / or other types of cells. A macrocell generally covers a relatively large geographic area (e.g., a few kilometers in radius) and may allow unrestricted access by UEs with a service subscription with the network provider. A small cell such as a picocell will generally cover a relatively small geographic area and may allow unrestricted access by UEs with a service subscription with the network provider. A small cell such as a femtocell will also generally cover a relatively small geographic area (e.g., a home) and may provide restricted access by UEs with an association with the femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in the home, etc.) in addition to unrestricted access. A BS for a macrocell may be referred to as a macroBS. A BS for a small cell may be referred to as a small cell BS, picoBS, femtoBS, or home BS. In the example shown in FIG. 1, BSs 105d and 105e may be regular macro BSs, while BSs 105a-105c may be macro BSs capable of one of three-dimensional (3D), full-dimensional (FD), or massive MIMO. BSs 105a-105c may utilize their higher-dimensional MIMO capabilities to leverage 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity. BS 105f may be a small cell BS, which may be a home node or a portable access point. BS 105 may support one or multiple (e.g., two, three, four, etc.) cells.

[0033] Network 100 may support synchronous or asynchronous operation. For synchronous operation, the BSs may have similar frame timing and transmissions from different BSs may be approximately aligned in time. For asynchronous operation, the BSs may have different frame timing and transmissions from different BSs may not be aligned in time.

[0034] The UEs 115 are dispersed throughout the wireless network 100, and each UE 115 may be fixed or mobile. The UEs 115 may also be referred to as terminals, mobile stations, subscriber units, stations, etc. The UEs 115 may be cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, tablet computers, laptop computers, cordless phones, wireless local loop (WLL) stations, etc. In one aspect, the UEs 115 may be devices that include a universal integrated circuit card (UICC). In another aspect, the UEs 115 may be devices that do not include a UICC. In some aspects, UEs 115 that do not include a UICC may also be referred to as IoT devices or internet of everything (IoE) devices. The UEs 115a-115d are examples of mobile smartphone-type devices that access the network 100. The UEs 115 may also be machines specifically configured for connected communications, including machine-type communications (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), etc. UEs 115e-115k are examples of various machines configured for communication to access network 100. UE 115 may be able to communicate with any type of BS, whether a macro BS, a small cell BS, etc. In FIG. 1, lightning bolts (e.g., communication links) refer to wireless transmissions between UE 115 and serving BS 105, which is a BS designated to serve UE 115 on the downlink and / or uplink, or desired transmissions between BSs, as well as backhaul transmissions between BSs.

[0035] In operation, the BSs 105a-105c may serve the UEs 115a and 115b using cooperative spatial techniques such as 3D beamforming and coordinated multipoint (CoMP) or multi-connectivity. The macro BS 105d may perform backhaul communications with the BSs 105a-105c and the small cell BS 105f. The macro BS 105d may also transmit multicast services to which the UEs 115c and 115d subscribe and are received by the UEs 115c and 115d. Such multicast services may include mobile television or stream video, or other services for providing community information, such as weather emergencies or warnings such as amber or grey alerts.

[0036] The BSs 105 may also communicate with a core network. The core network may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. At least some of the BSs 105 (which may be an example of a gNB or access node controller (ANC)) may interface with the core network through backhaul links (e.g., NG-C, NG-U, etc.) and may perform radio configuration and scheduling for communications with the UEs 115. In various examples, the BSs 105 may communicate with each other either directly or indirectly (e.g., through the core network) via backhaul links (e.g., X1, X2, etc.), which may be wired or wireless communication links.

[0037] Network 100 may also support mission-critical communications with ultra-reliable redundant links for mission-critical devices such as UE 115e, which may be a drone. The redundant communication links with UE 115e may include links from macro BSs 105d and 105e and from small cell BS 105f. Other machine-type devices, such as UE 115f (e.g., a thermometer), UE 115g (e.g., a smart meter), and UE 115h (e.g., a wearable device), may communicate through network 100 either directly with BSs such as small cell BS 105f and macro BS 105e, or in a multi-hop configuration by communicating with another user device that relays temperature measurement information to the network, such as UE 115f communicating temperature measurement information to UE 115g, which is a smart meter, through small cell BS 105f, which then reports that information to the network. Network 100 may also provide additional network efficiency through dynamic, low-latency TDD / FDD communications, such as in vehicle-to-vehicle (V2V) communications.

[0038] In some embodiments, network 100 utilizes an OFDM-based waveform for communication. An OFDM-based system may partition a system BW into multiple (K) orthogonal subcarriers, which are also commonly referred to as subcarriers, tones, bins, etc. Each subcarrier may be modulated with data. In some cases, the subcarrier spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may depend on the system BW. The system BW may also be partitioned into subbands. In other cases, the subcarrier spacing and / or the duration of the TTI may be scalable.

[0039] In some aspects, the 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 the network 100. DL refers to the transmission direction from the BS 105 to the UE 115, and UL refers to the transmission direction from the UE 115 to the BS 105. As mentioned above, communication may be in the form of a radio frame. A radio frame may be divided into multiple subframes or slots, e.g., about 10. Each slot may be further divided into minislots. In FDD mode, simultaneous UL and DL transmissions may occur in different frequency bands. For example, each subframe includes a UL subframe in the UL frequency band and a DL subframe in the DL frequency band. In TDD mode, UL and DL transmissions occur in different time periods using the same frequency band. For example, a subset of subframes within a radio frame (e.g., DL subframes) may be used for DL ​​transmissions, and another subset of subframes within the radio frame (e.g., UL subframes) may be used for UL transmissions.

[0040] The DL subframe and the UL subframe may be further divided into several regions. For example, each DL or UL subframe may have predefined regions for transmitting reference signals, control information, and data. The reference signal is a predetermined signal that facilitates communication between the BS 105 and the UE 115. For example, the reference signal may have a specific pilot pattern or structure, and the pilot tones may spread across an operating BW or frequency band, each located at a predefined time and a predefined frequency. For example, the BS 105 may transmit a cell-specific reference signal (CRS) and / or a channel state information reference signal (CSI-RS) to enable the UE 115 to estimate the DL channel. Similarly, the UE 115 may transmit a sounding reference signal (SRS) to enable the BS 105 to estimate the UL channel. The control information may include resource allocation and protocol control. The data may include protocol data and / or operational data. Control information, such as the PDCCH, is described above and further described below with respect to embodiments of the present disclosure. In some embodiments, the BS 105 and the UE 115 may communicate using self-contained subframes. A self-contained subframe may include a portion for DL ​​communication and a portion for UL communication. A self-contained subframe may be DL-centric or UL-centric. A DL-centric subframe may include a longer duration for DL ​​communication than for UL communication. A UL-centric subframe may include a longer duration for UL communication than for DL ​​communication.

[0041] In some aspects, the network 100 may be an NR network deployed over a licensed spectrum. The BS 105 may transmit synchronization signals (e.g., including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)) in the network 100 to facilitate synchronization. The BS 105 may broadcast system information (e.g., including a master information block (MIB), a remaining minimum system information (RMSI), and other system information (OSI)) associated with the network 100 to facilitate initial network access. In some instances, the BS 105 may broadcast the PSS, SSS, and / or MIB in the form of a synchronization signal block (SSB) over a physical broadcast channel (PBCH) and may broadcast the RMSI and / or OSI over a physical downlink shared channel (PDSCH).

[0042] In some aspects, a UE 115 attempting to access the network 100 may perform an initial cell search by detecting a PSS from the BS 105. The PSS may enable synchronization of periodic timing and may indicate a physical layer identity value. The UE 115 may then receive an SSS. The SSS may enable radio frame synchronization and may provide a cell identity value, which may be combined with the physical layer identity value to identify the cell. The PSS and SSS may be located in a central portion of a carrier or at any suitable frequency within a carrier.

[0043] After receiving the PSS and SSS, the UE 115 may receive the MIB. The MIB may include system information for initial network access and scheduling information for the RMSI and / or OSI. After decoding the MIB, the UE 115 may receive the RMSI and / or OSI. The RMSI and / or OSI may include radio resource control (RRC) information regarding random access channel (RACH) procedures, paging, a control resource set (CORESET) for physical downlink control channel (PDCCH) monitoring, a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), power control, and SRS.

[0044] After obtaining the MIB, RMSI, and / or OSI, the UE 115 can perform a random access procedure to establish a connection with the BS 105. For the random access procedure, the UE 115 may send a random access preamble, and the BS 105 may respond with a random access response. Upon receiving the random access response, the UE 115 may send a connection request to the BS 105, and the BS 105 may respond with a connection response (e.g., a contention resolution message).

[0045] After establishing the connection, the UE 115 and the BS 105 may enter a normal operation phase during which operational data may be exchanged. For example, the BS 105 may schedule the UE 115 for UL and / or DL ​​communication. The BS 105 may transmit UL and / or DL ​​scheduling grants to the UE 115 via a PDCCH. The BS 105 may transmit DL communication signals to the UE 115 via a PDSCH in accordance with the DL scheduling grant. The UE 115 may transmit UL communication signals to the BS 105 via a PUSCH and / or PUCCH in accordance with the UL scheduling grant.

[0046] In some aspects, the network 100 may operate over a system BW or a component carrier (CC) BW. The network 100 may partition the system BW into multiple bandwidth parts (BWPs) (e.g., portions). The BS 105 may dynamically assign the UE 115 to operate over a certain BWP (e.g., a certain portion of the system BW). The assigned BWP may be referred to as an active BWP. The UE 115 may monitor the active BWP for signaling information from the BS 105. The BS 105 may schedule the UE 115 for UL or DL ​​communication in the active BWP. In some embodiments, the BS 105 may assign a pair of BWPs within a CC to the UE 115 for UL and DL communication. For example, the BWP pair may include one BWP for UL communication and one BWP for DL ​​communication. The BS 105 may additionally configure the UE 115 with one or more CORESETs within the BWP. A CORESET may include a set of frequency resources spanning several symbols in time. The BS 105 may configure the UE 115 with one or more search spaces for PDCCH monitoring based on the CORESET. The UE 115 may perform blind decoding in the search space to search for DL ​​control information from the BS. In one example, the BS 105 may configure the UE 115 with the BWP, CORESET, and / or PDCCH search space via RRC configuration. Mechanisms for configuring the search space are described in more detail herein.

[0047] In some aspects, the network 100 may operate over a shared channel, which may include a shared frequency band or an unlicensed frequency band. For example, the network 100 may be an NR-U network. In such an embodiment, the BS 105 and the UE 115 may be operated by multiple network operation entities. To avoid collisions, the BS 105 and the UE 115 may employ a listen-before-talk (LBT) procedure to monitor for a transmission opportunity (TXOP) in the shared channel. For example, the BS 105 may acquire or reserve a TXOP or channel occupation time (COT) in the shared channel by performing a CAT4 LBT. CAT4 LBT refers to an LBT with a random backoff and a variable contention window. Upon passing the LBT, the BS 105 may schedule one or more UEs 115 for DL ​​and / or UL communication within the acquired COT.

[0048] According to embodiments of the present disclosure, the BS 105 may configure the UE 115 with multiple CORESETs having PDCCH search spaces for PDCCH monitoring. Different CORESETs may cover different frequency ranges, have different CCE-REG mappings or REG bundling, different TCI states (and thereby different beams), or some combination of these variations. Mechanisms for configuring (and using) different CORESETs are described in more detail herein.

[0049] FIG. 2 is a timing diagram illustrating a transmission frame structure 200 according to some embodiments of the present disclosure. The transmission frame structure 200 may be employed by a BS, such as BS 105, and a UE, such as UE 115, in a network, such as network 100, for communication. Specifically, the BS may communicate with the UE using time-frequency resources configured as shown in the transmission frame structure 200. In FIG. 2, the x-axis represents time in any arbitrary units, and the y-axis represents frequency in any arbitrary units. The transmission frame structure 200 includes a radio frame 202. The duration of the radio frame 202 may vary depending on the embodiment. In one example, the radio frame 202 may have a duration of approximately 10 milliseconds. The radio frame 202 includes M subframes 204, where M may be any suitable positive integer. In one example, M may be approximately 10.

[0050] Each subframe 204 may include N slots 206, where N is any suitable positive number, including 1. Each slot 206 includes a number of subcarriers 218 in frequency and a number of symbols 216 in time. The number of subcarriers 218 and / or the number of symbols 216 in a slot 206 may vary depending on the embodiment, for example, based on the channel bandwidth, subcarrier spacing (SCS), and / or cyclic prefix (CP) mode. One subcarrier 218 in frequency and one symbol 216 in time forms one resource element (RE) 220 for transmission.

[0051] A BS (e.g., BS 105 of FIG. 1) may schedule a UE (e.g., UE 115 of FIG. 1) for UL and / or DL ​​communications at a time granularity of slot 206. BS 105 may schedule UE 115 to monitor for PDCCH transmissions by instantiating a search space associated with CORESET 212. The search space may also be instantiated with an associated CORESET 214. Thus, as shown in the example of FIG. 2, within slot 206, there are two CORESETs, and therefore two monitoring occasions, that are part of the search space that UE 115 monitors for control information from BS 105.

[0052] While FIG. 2 shows two CORESETs 212 and 214, it will be appreciated that for ease of illustration and explanation, embodiments of the present disclosure may scale to more CORESETs, e.g., about three, four, or more. Each CORESET may include a set of resources spanning a certain number of subcarriers 218 and a number of symbols 216 (e.g., about one, two, or three) within a slot 206. As an alternative to multiple different CORESETs within a slot 206, one or more of the many CORESETs may be in a different slot than the others. Each CORESET has an associated control channel element (CCE)-resource element group (REG) mapping. A REG may include a group of REs 220. The CCE defines how DL control channel data may be transmitted.

[0053] The BS 105 may configure the UE 115 with one or more search spaces by associating a CORESET 212 with a starting position (e.g., a starting slot 206), a location of a symbol 216 within the slot 206, a periodicity or time pattern, and a candidate mapping rule. For example, a search space may include a set of candidates mapped to CCEs at aggregation levels of 1, 2, 4, 8, and / or 12 CCEs. As an example, a search space may include a CORESET 212 starting at a first symbol 216 indexed within the starting slot 206. The search space may also include a CORESET 214 starting at a later symbol indexed within the starting slot 206. An exemplary search space may have a periodicity of approximately 5 slots and may have candidates at aggregation levels of 1, 2, 4, and / or 8.

[0054] The UE 115 may perform blind decoding in the search space to search for DL ​​control information (e.g., slot format information and / or scheduling information) from the BS. In some examples, the UE may search a subset of the search space based on, for example, some rules associated with the UE's channel estimation and / or blind decoding capabilities. One such example of DL control information that the UE 115 may be blindly decoding is the PDCCH from the BS 105.

[0055] As shown in FIG. 2, CORESET 212 and CORESET 214 may be at different frequencies from each other. The CORESETs may be non-contiguous as shown, or may be contiguous. The frequency ranges of CORESET 212 and CORESET 214 may overlap or not overlap (e.g., as shown in FIG. 2, the frequency ranges partially overlap and therefore differ from each other). In some aspects, the frequency offset between the CORESETs is a multiple of six RBs or some other offset. According to the example of FIG. 2, each of CORESET 212 and CORESET 214 may carry a different PDCCH transmission (or may be part of the search space for UE 115, or may not carry any at all). CORESET 212 and CORESET 214 may have other characteristics that differ from each other not only (or instead of) frequency. For example, these CORESETs may differ in terms of CCE-REG mapping and / or REG bundling. Or, these CORESETs may be associated with different TCI states and therefore different beams. In addition, the CCE indices of the PDCCH monitoring occasions may vary across the CORESET, as will be described in more detail with respect to Figure 12. Other forms of diversity among the CORESETs may also be achieved, including some combination of different characteristics (such as all of the above differences taken together or a subset thereof).

[0056] By adding diversity among the CORESETs, transmission channel problems associated with their characteristics can be mitigated. Although Figure 2 shows two different CORESETs, there may be three or more CORESETs, each with any combination of the same or different characteristics.

[0057] Figure 3 shows a transmission frame structure 300 that is similar to the transmission frame structure 200 of Figure 2. The radio frame 302, subframe 304, and slot 306 are similar to the radio frame 202, subframe 204, and slot 206, respectively. The RE 320 consists of a single OFDM symbol 316 and a single subcarrier 318. The CORESET 312 and CORESET 314 are also similar to the CORESET 212 and CORESET 214, respectively, of Figure 2. Therefore, the description will focus on additional aspects shown in Figure 3.

[0058] 3, CORESET 312 and CORESET 314 are part of aggregated monitoring occasion 322. This means that CORESET 312 and CORESET 314 carry the same PDCCH (i.e., multiple repetitions of the PDCCH over aggregated sets of multiple monitoring occasions associated with different CORESETs 312 and 314). Aggregation of monitoring occasions mitigates potential beam diversity issues by transmitting the same PDCCH over aggregated sets of multiple monitoring occasions. For example, related U.S. provisional application having attorney docket number 204172P1 describes further details regarding general monitoring occasion aggregation and is incorporated by reference in its entirety as if fully set forth herein.

[0059] According to embodiments of the present disclosure, additional diversity is achieved by making CORESETs 312 and 314 different from each other in some respect, such as frequency, CCE-REG mapping, REG bundling, TCI state, or some combination of these and other CORESET characteristics. CORESETs can be either contiguous or non-contiguous. In addition, there can be three or more aggregated CORESETs, each having any combination of the same or different characteristics from each other. By adding diversity to the characteristics of a CORESET, a more robust network can be achieved. CORESETs can be either contiguous or non-contiguous. In addition, there can be three or more aggregated CORESETs, each having any combination of the same or different characteristics from each other. Further details are described below.

[0060] In some aspects, the UE 115 receives a monitoring configuration (or frequency diversity configuration) that includes an indication of a frequency allocation of a CORESET associated with a search space, such as CORESET 314. The frequency allocation of the CORESET may indicate a frequency offset. In some aspects, the frequency offset may include a multiple of six resource blocks (RBs).

[0061] In some aspects, as shown, the first CORESET 312 may be associated with a first frequency resource allocation, and the second CORESET 314 may be associated with a second frequency resource allocation. The second frequency resource allocation may indicate a frequency offset. In some aspects, the frequency offset indication may indicate a frequency offset as a function of the initial symbol of the second CORESET 314 (e.g., as a function of the location of the second CORESET 314 within the slot 306).

[0062] In some aspects, the monitoring configuration may indicate a specified number of PDCCH monitoring occasions (or CORESETs) per slot, and a frequency offset may be associated with the specified monitoring occasions per slot. For example, the frequency offset may be associated with the second CORESET 314 in each slot. In some aspects, as shown, the frequency diversity configuration may indicate a specified number of CORESETs 312 and 314 per aggregated monitoring occasion 322. The frequency offset may be associated with the specified CORESET 314 per aggregated monitoring occasion 322. For example, the frequency offset may be associated with the second CORESET 314 of the aggregated monitoring occasion 322.

[0063] In some aspects, the frequency offset may be associated with a subset of the plurality of CORESETs, including the second CORESET and at least the third CORESET. For example, in some aspects, the frequency offset may be associated with the second and third CORESETs of the plurality of CORESETs.

[0064] 4 is a block diagram of an example UE 400 according to an embodiment of the present disclosure. The UE 400 may be a UE 115 in the network 100 as described above in FIG. 1. As shown, the UE 400 may include a processor 402, a memory 404, a PDCCH monitoring module 408, a transceiver 410 including a modem subsystem 412 and a radio frequency (RF) unit 414, and one or more antennas 416. These elements may be in direct or indirect communication with each other, for example, via one or more buses.

[0065] The processor 402 may include a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein. The processor 402 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0066] The memory 404 may include cache memory (e.g., cache memory of the processor 402), 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 a combination of different types of memory. In one embodiment, the memory 404 includes a non-transitory computer-readable medium. The memory 404 may store or have instructions 406 recorded thereon. The instructions 406 may include instructions that, when executed by the processor 402, cause the processor 402 to perform operations described herein with reference to the UE 115 with respect to embodiments of the present disclosure, e.g., aspects of FIGS. 2-3 and 6-18. The instructions 406 may also be referred to as program code. The program code may be for causing a wireless communication device to perform these operations, for example, by causing one or more processors (such as processor 402) to control or command the wireless communication device to do so. The terms "instructions" and "code" should be interpreted broadly to include any type of computer-readable statement. For example, the terms "instructions" and "code" may refer to one or more programs, routines, subroutines, functions, procedures, etc. "Instructions" and "code" may include a single computer-readable statement or many computer-readable statements.

[0067] The PDCCH monitoring module 408 may be implemented via hardware, software, or a combination thereof. For example, the PDCCH monitoring module 408 may be implemented as a processor, circuitry, and / or instructions 406 stored in the memory 404 and executed by the processor 402. In some examples, the PDCCH monitoring module 408 may be integrated within the modem subsystem 412. For example, the PDCCH monitoring module 408 may be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 412.

[0068] The PDCCH monitoring module 408 may be used in various aspects of the present disclosure, for example, the aspects of FIGS. 2-3 and 6-18. The PDCCH monitoring module 408 is configured to receive a monitoring configuration from a BS (e.g., BS 105 of FIG. 1). The monitoring configuration may indicate multiple CORESETs associated with the same or multiple search spaces. The PDCCH monitoring module 408 is further configured to perform either single-CORESET PDCCH monitoring, multi-CORESET PDCCH monitoring, or multi-CORESET aggregate monitoring depending on the current state and / or embodiment. In some aspects of the present disclosure, the PDCCH monitoring module 408 may be configured to implicitly activate multi-CORESET monitoring (different CORESETs) when PDCCH monitoring occasion aggregation is activated. In other examples, the PDCCH monitoring module 408 may be configured to explicitly activate multi-CORESET monitoring in response to an activation message (e.g., via semi-static RRC configuration messaging or more dynamic MAC CE or DCI messaging).

[0069] The monitoring configuration received by the PDCCH monitoring module 408 may also include diversity information. For example, the multiple CORESETs indicated by the monitoring configuration may use different frequency resources and / or different beams. In addition, the CCE-REG mapping may differ among the CORESETs. The monitoring configuration received by the PDCCH monitoring module 408 may also, or alternatively, indicate multiple hashing functions for identifying one or more CCE indices of the set of PDCCH candidates in the search space, where a hashing function of the multiple hashing functions depends on at least one of the position of a corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof. These may be alternative options or may be used together in some combination, such as according to some examples described with respect to additional figures below.

[0070] The PDCCH monitoring module 408 may include one or more instructions that, when executed by one or more processors of the UE 400, cause the UE 400 to determine that a parameter satisfies a condition. The PDCCH monitoring module 408 may determine that a parameter satisfies a condition based at least in part on a determination that the parameter satisfies a specified threshold. In some aspects, the parameter may indicate a size of a CORESET associated with the search space, a size of a bandwidth associated with the search space, a frequency range associated with the search space, a subcarrier spacing associated with the search space, a search space type associated with the search space, etc., as described below with respect to Figures 13, 14, 15, and 17.

[0071] As shown, the transceiver 410 may include a modem subsystem 412 and an RF unit 414. The transceiver 410 may be configured to communicate bidirectionally with other devices, such as the BS 105. The modem subsystem 412 may be configured to modulate and / or encode data from the memory 404 and / or the PDCCH monitoring module 408 according to a modulation and coding scheme (MCS), e.g., a low-density parity-check (LDPC) coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc. The RF unit 414 may be configured to process (e.g., perform analog-to-digital or digital-to-analog conversion, etc.) the modulated / encoded data from the modem subsystem 412 (on outbound transmissions) or for transmissions originating from another source, such as the UE 115 or the BS 105. The RF unit 414 may be further configured to perform analog beamforming in conjunction with digital beamforming. While shown as integrated together in the transceiver 410, the modem subsystem 412 and the RF unit 414 may be separate devices coupled together in the UE 115 to enable the UE 115 to communicate with other devices. The transceiver 410 may be further configured to monitor for DCI within a search space associated with multiple PDCCH monitoring occasions based at least in part on a monitoring configuration and / or a hashing function.

[0072] The RF unit 414 may provide modulated and / or processed data, e.g., data packets (or, more generally, data messages, which may include one or more data packets and other information), to the antenna 416 for transmission to one or more other devices. The antenna 416 may further receive data messages transmitted from other devices. The antenna 416 may provide the received data messages for processing and / or demodulation in the transceiver 410. The antenna 416 may include multiple antennas of similar or different designs to maintain multiple transmission links. The RF unit 414 may configure the antenna 416.

[0073] In one embodiment, the UE 400 may include multiple transceivers 410 that implement different RATs (e.g., NR and LTE). In one embodiment, the UE 400 may include a single transceiver 410 that implements multiple RATs (e.g., NR and LTE). In one embodiment, the transceiver 410 may include various components, and different combinations of components may implement the RATs.

[0074] 5 is a block diagram of an exemplary BS 500 according to an embodiment of the present disclosure. The BS 500 may be a BS 105 in the network 100 as described above in FIG. 1. As shown, the BS 500 may include a processor 502, a memory 504, a DL control channel module 508, a transceiver 510 including a modem subsystem 512 and an RF unit 514, and one or more antennas 516. These elements may be in direct or indirect communication with each other, for example, via one or more buses.

[0075] The processor 502 may have various characteristics as a particular type of processor. For example, they may include a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein. The processor 502 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0076] The memory 504 may include cache memory (e.g., cache memory of the processor 502), 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 a combination of different types of memory. In some embodiments, the memory 504 may include a non-transitory computer-readable medium. The memory 504 may store instructions 506. The instructions 506 may include instructions that, when executed by the processor 502, cause the processor 502 to perform the operations described herein, e.g., aspects of FIGS. 2-3 and 6-18. The instructions 506 may also be referred to as code, which may be broadly interpreted to include any type of computer-readable statement, as described above with respect to FIG. 4.

[0077] The DL control channel module 508 may be implemented via hardware, software, or a combination thereof. For example, the DL control channel module 508 may be implemented as a processor, circuitry, and / or instructions 506 stored in memory 504 and executed by the processor 502. In some examples, the DL control channel module 508 may be integrated within the modem subsystem 512. For example, the DL control channel module 508 may be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 512.

[0078] The DL control channel module 508 may be used in various aspects of the present disclosure, for example, the aspects of FIGS. 2-3 and 6-18. The DL control channel module 508 is configured to transmit a monitoring configuration to a UE (e.g., the UE 115 of FIG. 1). The monitoring configuration may indicate, for example, multiple CORESETs for the UE 115 to monitor within a search space having multiple monitoring occasions. The monitoring configuration may indicate differences between configured CORESETs, such as diversity in either frequency or beam or otherwise. For example, the CORESETs may be configured with a frequency offset between them or with different CCE-REG mappings.

[0079] The monitoring configuration may include repetition of downlink control information (DCI) over multiple physical downlink control channel (PDCCH) monitoring occasions of the search space, where at least two PDCCH monitoring occasions of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations.

[0080] The monitoring configuration may also indicate multiple hashing functions for identifying one or more control channel element (CCE) indices of the set of PDCCH candidates in the search space, where a hashing function of the multiple hashing functions depends on at least one of a position of the corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof. The DL control channel module 508 is further configured to either explicitly or implicitly activate multi-CORESET monitoring on the UE by activating some other aspect such as monitoring occasion aggregation (or in other embodiments, without monitoring aggregation, but by explicit messaging via either RRC configuration, MAC CE, and / or DCI messaging).

[0081] In some aspects, the base station DL control channel module 508 may include means for transmitting a monitoring configuration to the UE, the monitoring configuration including iterations of DCI over multiple PDCCH monitoring occasions of a search space, the monitoring configuration indicating multiple hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, a hashing function of the multiple hashing functions depending on at least one of a position of a corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; means for transmitting the DCI in the search space associated with the multiple PDCCH monitoring occasions based at least in part on the hashing function;

[0082] The DL control channel module 508 may include one or more instructions that, when executed by one or more processors of the BS 500, cause the BS 500 to determine that a parameter satisfies a condition. The DL control channel module 508 may determine that a parameter satisfies a condition based at least in part on a determination that the parameter satisfies a specified threshold. In some aspects, the parameter may indicate a size of a CORESET associated with the search space, a size of a bandwidth associated with the search space, a frequency range associated with the search space, a subcarrier spacing associated with the search space, a search space type associated with the search space, etc., as described below with respect to Figures 13, 14, 15, and 17.

[0083] The DL control channel module 508 may use one or more inputs or conditions to determine when and how to activate multi-CORESET monitoring. For example, the DL control channel module 508 may consider the CORESET size, frequency range, subcarrier spacing, and type of search space (e.g., UE-specific search space or common search space). The DL control channel module 508 may configure the UE 115 to monitor CORESETs having different frequencies, different CCE-REG mappings, different REG bundling, and / or different TCI states, or any other characteristic of the CORESET by which diversity can be achieved. The DL control channel module 508 may also perform one or more techniques associated with techniques for hashing function perturbation for PDCCH monitoring aggregation. The DL control channel module 508 may determine that multi-CORESET monitoring should be configured based on some channel quality measurement, either direct or indirect. The DL control channel module 508 may, for example, pre-configure the UE 115 to perform monitoring according to one or more of the conditions described above.

[0084] As shown, the transceiver 510 may include a modem subsystem 512 and an RF unit 514. The transceiver 510 may be configured to communicate bidirectionally with other devices, such as the UE 115 and / or another core network element. The transceiver 510 may transmit DCI via multiple PDCCH monitoring occasions based at least in part on a frequency diversity configuration and / or a monitoring configuration. The modem subsystem 512 may be configured to modulate and / or encode data according to an MCS, e.g., an LDPC coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc. The RF unit 514 may be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) the modulated / encoded data for transmissions originating from the modem subsystem 512 (on outbound transmissions) or from another source, such as the UE 115 or 400. The RF unit 514 may be further configured to perform analog beamforming in conjunction with digital beamforming. Although shown as integrated together in the transceiver 510, the modem subsystem 512 and / or the RF unit 514 may be separate devices coupled together at the BS 105 to enable the BS 105 to communicate with other devices.

[0085] The RF unit 514 may provide modulated and / or processed data, e.g., data packets (or, more generally, data messages that may include one or more data packets and other information), to the antenna 516 for transmission to one or more other devices. This may include, for example, transmitting information to complete attachment to a network and communicating with a camped UE 115 or 500 according to embodiments of the present disclosure. The antenna 516 may also receive data messages transmitted from other devices and provide the received data messages for processing and / or demodulation in the transceiver 510. The antenna 516 may include multiple antennas of similar or different designs to maintain multiple transmission links.

[0086] In one embodiment, the BS 500 may include multiple transceivers 510 that implement different RATs (e.g., NR and LTE). In one embodiment, the BS 500 may include a single transceiver 510 that implements multiple RATs (e.g., NR and LTE). In one embodiment, the transceiver 510 may include various components, and different combinations of components may implement the RATs.

[0087] 6 is a signaling diagram illustrating a method 600 of communicating using multiple different CORESETs according to some embodiments of the present disclosure. The method 600 may be implemented between a BS (e.g., BS 105 or BS 500) and a UE (e.g., UE 115 or UE 400). In the illustration of FIG. 6, a first device 602 may be an example of a UE 400, and a second device 604 may be an example of a BS 500.

[0088] Method 600 may employ mechanisms similar to those of structures 200 and / or 300 described above with respect to Figures 2 and 3, respectively, and / or methods 900 and 1000 described herein with respect to Figures 9 and 10, respectively. The steps of method 600 may be performed by computing devices (e.g., processors, processing circuits, and / or other suitable components) of BS 500 and UE 400. In one example, BS 500 may utilize one or more components, such as processor 502, memory 504, DL control channel module 508, transceiver 510, modem 512, and one or more antennas 516, to perform the steps of method 600. UE 400 may utilize one or more components, such as processor 402, memory 404, PDCCH monitoring module 408, transceiver 410, modem 412, and one or more antennas 416, to perform the steps of method 600. As shown, method 600 includes several enumerated steps, although embodiments of method 600 may include additional steps before, after, and between the enumerated steps. In some embodiments, one or more of the enumerated steps may be omitted or performed in a different order.

[0089] At action 610, the second device 604 sends a monitoring configuration to the first device 602. The monitoring configuration may include configuration information for defining multiple CORESETs and thereby defining a search space as described herein.

[0090] After receiving the monitoring configuration, the first device 602 (e.g., UE 400) may not begin monitoring multiple different CORESETs (e.g., differing in frequency, CCE mapping, REG bundling, and / or different TCI states, etc.) until it receives a multi-CORESET activation signal at action 612. The multi-CORESET signal may be an explicit signal indicating to the first device 602 that multiple different CORESETs should be monitored. The multi-CORESET signal may be semi-static via RRC configuration and / or dynamic via MAC CE or UE-specific DCI or group-common DCI.

[0091] At action 614, the UE monitors its configured search space, which includes multiple different CORESETs for the PDCCH (i.e., CORESETs having one or more characteristics different from each other), according to configuration and activation. Means for performing the function of action 614 may, but need not necessarily, include, for example, with reference to FIG. 4 , the PDCCH monitoring module 408, the transceiver 410, the antenna 416, the processor 402, and / or the memory 404 of the UE 400.

[0092] 7 is a signaling diagram illustrating a method 700 of communicating using multiple different CORESETs in accordance with some embodiments of the present disclosure. In contrast to method 600, in which multi-CORESET monitoring is explicitly activated, in FIG. 7, multi-CORESET monitoring is implicitly activated. For example, in one embodiment, the implicit activation is achieved via a PDCCH monitoring aggregation signal. In the illustration of FIG. 7, a first device 702 may be an example of a UE 400, and a second device 704 may be an example of a BS 500.

[0093] Method 700 may be implemented between a BS (e.g., BS 105 or BS 500) and a UE (e.g., UE 115 or UE 400). Method 700 may employ mechanisms similar to those of structure 300 described above with respect to FIG. 3 and / or methods 900, 1000, and 1100 described herein with respect to FIGS. 9, 10, and 11, respectively. The steps of method 700 may be performed by computing devices (e.g., processors, processing circuits, and / or other suitable components) of BS 500 and UE 400. In one example, BS 500 may utilize one or more components, such as processor 502, memory 504, DL control channel module 508, transceiver 510, modem 512, and one or more antennas 516, to perform the steps of method 700. The UE 400 may utilize one or more components, such as a processor 402, a memory 404, a PDCCH monitoring module 408, a transceiver 410, a modem 412, and one or more antennas 416, to perform the steps of the method 700. As shown, the method 700 includes several enumerated steps, although embodiments of the method 700 may include additional steps before, after, and between the enumerated steps. In some embodiments, one or more of the enumerated steps may be omitted or performed in a different order.

[0094] At action 710, the second device 704 sends a monitoring configuration to the first device 702. The monitoring configuration may include configuration information for defining multiple different CORESETs and thereby defining a search space as described herein. This may be done semi-statically, for example, via RRC configuration messaging.

[0095] After receiving the monitoring configuration, the first device 702 (e.g., UE 400) may not start monitoring multiple different CORESETs (e.g., differing in frequency, CCE mapping, REG bundling, and / or different TCI states, etc.) until it receives a PDCCH monitoring aggregation signal at action 712. In this embodiment, when PDCCH monitoring aggregation is enabled, multi-CORESET monitoring is also implicitly enabled according to the monitoring configuration. In this way, aggregated monitoring occasions are associated with the same PDCCH transmissions on different CORESETs that have some diversity in one or more characteristics (e.g., differing in frequency, CCE mapping, REG bundling, and / or different TCI states, etc.). The activation signal (PDCCH monitoring aggregation signal) may be semi-static via RRC configuration and / or dynamic via MAC CE or UE-specific DCI or group-common DCI.

[0096] At action 714, the first device 702 monitors its configured search space, which includes multiple different CORESETs (i.e., CORESETs having one or more characteristics different from each other) for the same PDCCH according to configuration and activation (using aggregation to achieve higher power, as previously described). Means for performing the functions of step 714 may, for example, but are not necessarily, included in the PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404 of the UE 400, with reference to FIG. 4 .

[0097] 8 is a signaling diagram illustrating a method 800 of communicating using multiple different CORESETs according to some embodiments of the present disclosure. The method 800 may be implemented between a BS (e.g., BS 105 or BS 500) and multiple UEs (e.g., UEs 115 or UEs 400). In the illustration of FIG. 8, the first and second devices 802, 804 may both be examples of UEs 400, and the third device 806 may be an example of a BS 500.

[0098] Method 800 may employ mechanisms similar to those of structures 200 and / or 300 described above with respect to Figures 2 and 3, respectively, and / or methods 900, 1000, and 1100 described herein with respect to Figures 9, 10, and 11, respectively. The steps of method 800 may be performed by computing devices (e.g., processors, processing circuits, and / or other suitable components) of BS 500 and UE 400. In one example, BS 500 may utilize one or more components, such as processor 502, memory 504, DL control channel module 508, transceiver 510, modem 512, and one or more antennas 516, to perform the steps of method 800. UE 400 may utilize one or more components, such as processor 402, memory 404, PDCCH monitoring module 408, transceiver 410, modem 412, and one or more antennas 416, to perform the steps of method 800. As shown, method 800 includes several enumerated steps, although embodiments of method 800 may include additional steps before, after, and between the enumerated steps. In some embodiments, one or more of the enumerated steps may be omitted or performed in a different order.

[0099] At action 810, the third device 806 (e.g., the BS 500) transmits a monitoring configuration to the first device 802 and the second device 804. The monitoring configuration may be sent to each device individually through a separate transmission or through a mechanism that communicates with both devices simultaneously. For example, the transmission may be an RRC configuration message, a system information (SI) broadcast, or the like. The monitoring configuration may include configuration information for defining multiple different CORESETS (e.g., differing in frequency, CCE mapping, REG bundling, and / or different TCI states, etc.) and for defining a search space as described herein. After receiving the monitoring configuration, one or both of the first and second devices 802, 804 may delay monitoring the multiple different CORESETS until receiving an activate signal at action 812. Thus, the first device 802 may wait to monitor the multiple different CORESETS until receiving an activate signal, regardless of whether the second device 804 also receives an activate signal. The same is true for the second device 804 relative to the first device 802.

[0100] The activate signal may be, for example, an explicit signal indicating to the device that multiple different CORESETs should be monitored (multi-CORESET monitoring). This is similar to the approach described above with respect to FIG. 6. The activate signal may be semi-static via RRC configuration and / or dynamic via a MAC CE or UE-specific DCI or group-common DCI. For example, the first device 802 and the second device 804 may each receive a UE-specific DCI targeted at them separately, while in other examples, both devices may receive a group-common DCI (e.g., if both are in the same group).

[0101] At action 814, the first and second devices 802 and 804 monitor for a PDCCH according to configuration and activation. Means for performing the functions of step 814 when executed by the UE 400 may include, for example, with reference to FIG. 4 , the PDCCH monitoring module 408, the transceiver 410, the antenna 416, the processor 402, and / or the memory 404, but this is not necessarily the case.

[0102] FIG. 9 is a flow diagram of a communication method 900 according to some embodiments of the present disclosure. The steps of method 900 may be performed by a computing device (e.g., a processor, processing circuit, and / or other suitable components) of a wireless communication device or other suitable means for performing the steps. For example, a wireless communication device such as UE 115 or UE 400 may utilize one or more components, such as a processor 402, a memory 404, a PDCCH monitoring module 408, a transceiver 410, a modem 412, and one or more antennas 416, to perform the steps of method 900. Method 900 may employ the structure described above with respect to FIGS. 2 and 3 and / or mechanisms similar to those of schemes 600, 700, and 800 described herein with respect to FIGS. 6, 7, and 8, respectively. As shown, method 900 includes several enumerated steps, although embodiments of method 900 may include additional steps before, after, and between the enumerated steps. In some embodiments, one or more of the enumerated steps may be omitted or performed in a different order.

[0103] In block 910, the UE 400 receives a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET. According to embodiments of the present disclosure, the first CORESET corresponds to a different monitoring occasion than the second CORESET, even within the same search space. Furthermore, the first CORESET differs from the second CORESET in any of frequency, CCE mapping, REG bundling, and / or TCI state. In some instances, the means for performing the functionality of action 910 may, but need not necessarily, include the PDCCH monitoring module 408, the transceiver 410, the antenna 416, the processor 402, and / or the memory 404, e.g., with reference to FIG. 4 .

[0104] At action 920, the UE 400 monitors a search space including multiple monitoring occasions for physical downlink control channel (PDCCH) transmissions based on the monitoring configuration. This may, in some examples, include monitoring non-aggregated monitoring occasions for PDCCH instances in one of different CORESETs (e.g., differing in frequency, CCE mapping, REG bundling, TCI state, etc.). In other examples, this may include monitoring the monitoring occasions as an aggregated set of occasions, i.e., each monitoring occasion includes the same PDCCH for coverage extension. Adding different CORESETs provides further reliability and robustness in accordance with embodiments of the present disclosure. In some instances, means for performing the functions of step 920 may, but need not necessarily, include the PDCCH monitoring module 408, the transceiver 410, the antenna 416, the processor 402, and / or the memory 404, for example, with reference to FIG. 4 .

[0105] 10 is a flow diagram of a communication method 1000 according to some embodiments of the present disclosure. The steps of method 1000 may be performed by a computing device (e.g., a processor, processing circuit, and / or other suitable components) of a wireless communication device or other suitable means for performing the steps. For example, a wireless communication device such as UE 115 or UE 400 may utilize one or more components, such as a processor 402, a memory 404, a PDCCH monitoring module 408, a transceiver 410, a modem 412, and one or more antennas 416, to perform the steps of method 1000. Method 1000 may employ the structure described above with respect to FIGS. 2 and 3 and / or mechanisms similar to those of schemes 600, 700, and 800 described with respect to FIGS. 6, 7, and 8, respectively. As shown, method 1000 includes several enumerated steps, although embodiments of method 1000 may include additional steps before, after, and between the enumerated steps. In some embodiments, one or more of the listed steps may be omitted or performed in a different order.

[0106] In block 1010, the UE 400 receives a monitoring configuration that specifies multiple CORESETs that differ from each other (e.g., different frequencies, CCE mappings, REG bundling, and / or TCI states, to name a few). In some instances, the means for performing the functions of step 1010 may, but need not necessarily, include the PDCCH monitoring module 408, the transceiver 410, the antenna 416, the processor 402, and / or the memory 404, for example, with reference to FIG. 4 .

[0107] At block 1020, the method 1000 includes receiving an indication triggering the initiation of multi-CORESET search space monitoring. The indication may take several forms, e.g., explicit activation of multi-CORESET PDCCH monitoring through an RRC configuration message, a UE-specific DCI message, or a group-common DCI message. As another example, the activation may be implicit through activation of some other configuration that the device is pre-configured to recognize as an indication to activate multi-CORESET monitoring.

[0108] In block 1030, the UE 400 determines whether conditions are imposed on when multi-CORESET monitoring in accordance with embodiments of the present disclosure may begin. For example, multi-CORESET monitoring may be conditioned on the size of the CORESET in terms of either the number of RBs and / or the number of OFDM symbols. As another example, multi-CORESET monitoring may be conditioned on the available frequency range. As a further example, multi-CORESET monitoring may be conditioned on the subcarrier spacing. As another example, multi-CORESET monitoring may be conditioned on the type of search space (e.g., UE-specific search space or common search space). These are just a few examples. Multi-CORESET may be conditioned on any one or more of such examples (e.g., a subset or all of them). Block 1030 may be optional, and in some circumstances, the BS 500 may not configure the UE 400 to depend on any such conditions for multi-CORESET monitoring in accordance with embodiments of the present disclosure. In such a situation, the UE 400 may proceed from block 1020 to decision block 1050 without having to test for conditions related to operation.

[0109] In decision block 1040, the UE 400 determines whether the condition determined from block 1030 is met. For example, if a condition is imposed requiring a CORESET of at least a certain size (e.g., greater than or less than a certain size), the UE 400 may determine whether the size condition is met. As another example, if the condition is related to a frequency range, the UE 400 may determine whether the range is met. Whatever the condition imposed, if the UE 400 determines that the condition is not yet met, the UE 400 may return to block 1030. In that case, operation continues to check whether the condition is met unless the UE 400 is signaled to stop multi-CORESET monitoring by another monitoring configuration message and / or indication message.

[0110] Alternatively, if the UE 400 determines at decision block 1040 that the condition is met, the method 1000 proceeds to decision block 1050 .

[0111] In decision block 1050, the UE 400 determines whether the indication received in block 1020 was a signal to activate PDCCH monitoring aggregation (referred to elsewhere in this specification as implicit signaling for multi-CORESET monitoring using PDCCH monitoring aggregation) or, in contrast, some other configuration message for non-aggregated multi-CORESET monitoring (referred to elsewhere in this specification as an explicit signaling situation).

[0112] If the indication was not to activate PDCCH monitoring aggregation, e.g., the indication was instead an explicit signal, method 1000 proceeds to block 1060. At block 1060, UE 400 begins monitoring non-aggregated CORESETs for PDCCH transmissions. In this situation, CORESET monitoring occasions are not aggregated, but diversity is provided among the CORESETs, either in frequency, CCE mapping, REG bundling, TCI state, or some combination thereof, in accordance with an embodiment of the present disclosure.

[0113] Returning to decision block 1040, if the UE 400 instead determines that the instruction was to activate PDCCH monitoring aggregation, method 1000 proceeds to block 1070. At block 1070, the UE 400 begins monitoring a search space that includes multiple monitoring occasions for PDCCH transmissions that are repeated (i.e., repeated at each monitoring occasion of the search space).

[0114] In some cases, the means for performing the functions of the blocks of method 1000 may, but need not necessarily, include, for example, with reference to FIG. 4 , the PDCCH monitoring module 408, the transceiver 410, the antenna 416, the processor 402, and / or the memory 404.

[0115] 11 is a flow diagram of a communication method 1100 according to some embodiments of the present disclosure. The steps of method 1100 may be performed by a computing device (e.g., a processor, processing circuit, and / or other suitable components) of a wireless communication device or other suitable means for performing the steps. For example, a wireless communication device such as BS 105 or BS 500 may utilize one or more components, such as a processor 502, a memory 504, a DL control channel module 508, a transceiver 510, a modem 512, and one or more antennas 516, to perform the steps of method 1100. Method 1100 may employ the structure described above with respect to FIGS. 2 and 3 and / or mechanisms similar to those of schemes 600, 700, and 800 described with respect to FIGS. 6, 7, and 8, respectively. As shown, method 1100 includes several enumerated steps, although embodiments of method 1100 may include additional steps before, after, and between the enumerated steps. In some embodiments, one or more of the listed steps may be omitted or performed in a different order.

[0116] In block 1110, the BS 500 sends a monitoring configuration message to one or more UEs, such as the UE 400, specifying multiple CORESETs that differ from each other (e.g., different frequencies, CCE mappings, REG bundling, and / or TCI states, to name a few).

[0117] At decision block 1120, the BS 500 determines whether PDCCH monitoring aggregation is used. If not, the method 1100 proceeds to decision block 1130.

[0118] In decision block 1130, the BS 500 determines whether to send an explicit indication of when to initiate multi-CORESET monitoring in the UE 400. If the BS 500 will send an explicit indication (e.g., via RRC configuration signaling, MAC CE, UE-specific DCI, or group-common DCI, as some examples), the method 1100 proceeds to block 1140.

[0119] At block 1140, the BS 500 sends an explicit instruction (e.g., via one of the approaches mentioned above) to the UE 400 to trigger the UE 400 to begin non-aggregated multi-CORESET PDCCH monitoring in accordance with an embodiment of the present disclosure. In this situation, the CORESET monitoring occasions are not aggregated, but diversity is provided among the CORESETs in either frequency, CCE mapping, REG bundling, TCI state, or some combination thereof in accordance with an embodiment of the present disclosure.

[0120] Returning to decision block 1130, if there is instead no explicit instruction, method 1100 may proceed to block 1160 without the action of block 1140. This may correspond, for example, to a situation where UE 400 is pre-configured (e.g., via monitoring configuration 1110) to begin multi-CORESET monitoring by default without requiring activation, thereby reducing at least one aspect of signaling overhead.

[0121] Returning now to decision block 1120, if BS 500 determines that eye aggregation is to be used, method 1100 instead proceeds to block 1150.

[0122] At block 1150, the BS 500 prepares and sends to the UE 400 an indication to start PDCCH monitoring aggregation. This may be an implicit indication to the UE 400 to begin multi-CORESET monitoring, also according to an embodiment of the present disclosure. Alternatively, the indication to start PDCCH monitoring aggregation may also include an explicit bit or combination of bits that informs the UE 400 to start multi-CORESET monitoring as part of PDCCH monitoring aggregation. This indication may be sent as part of an RRC configuration message, a MAC CE, a UE-specific DCI, or a group-common DCI. From block 1150, method 1100 proceeds to block 1160.

[0123] In block 1160, whether from block 1140 or block 1150, the BS 500 proceeds to send one or more PDCCHs in different CORESETs (e.g., differing in frequency, CCE mapping, REG bundling, TCI state, any combination of these, etc.) to the UE 400.

[0124] FIG. 12 is a diagram illustrating an example resource structure 1200 for wireless communications in accordance with various aspects of the present disclosure. The resource structure 1200 illustrates an example of various groupings of resources described herein. As shown, the resource structure 1200 may include a subframe 1205. The subframe 1205 may include multiple slots 1210. Although the resource structure 1200 is shown as including two slots per subframe, a different number of slots may be included in a subframe (e.g., four slots, eight slots, 16 slots, 32 slots, etc.). In some aspects, different types of transmission time intervals (TTIs) other than subframes and / or slots may be used. The slot 1210 may include multiple symbols 1215, such as seven symbols or fourteen symbols per slot.

[0125] A potential control region of a slot 1210 may be referred to as a control resource set (CORESET) 1220 and may be structured to support efficient use of resources, such as by flexible configuration or reconfiguration of resources in the CORESET 1220 for one or more PDCCHs, one or more physical downlink shared channels (PDSCHs), etc. In some aspects, the CORESET 1220 may occupy the first symbol 1215 of the slot 1210, the first two symbols 1215 of the slot 1210, or the first three symbols 1215 of the slot 1210. Thus, the CORESET 1220 may include multiple resource blocks (RBs) in the frequency domain and either one, two, or three symbols 1215 in the time domain. In 5G, the amount of resources included in the CORESET 1220 may be flexibly configured, such as by using radio resource control (RRC) signaling to indicate the frequency domain region (e.g., amount of resource blocks) and / or the time domain region (e.g., amount of symbols) for the CORESET 1220.

[0126] As shown, the symbol 1215 containing the CORESET 1220 may include one or more control channel elements (CCEs) 1225, shown as two CCEs 1225 by way of example, spanning a portion of the system bandwidth. The CCEs 1225 may include DCI used to provide control information for wireless communications. A base station may transmit DCI over multiple CCEs 1225 (as shown), where the amount of CCEs 1225 used for transmission of the DCI represents the aggregation level (AL) used by the BS for transmission of the DCI. In FIG. 12, an aggregation level of 2 is shown by way of example, corresponding to two CCEs 1225 in the slot 1210. In some aspects, different aggregation levels such as 1, 4, 8, 16, etc. may be used.

[0127] Each CCE 1225 may include a fixed amount of REGs 1230, shown as four resource element groups (REGs) 1230, or may include a variable amount of REGs 1230. In some aspects, the amount of REGs 1230 included in a CCE 1225 may be specified by a REG bundle size. A REG 1230 may include one resource block, which may include 12 resource elements (REs) 1235 within a symbol 1215. A resource element 1235 may occupy one subcarrier in the frequency domain and one OFDM symbol in the time domain.

[0128] A search space may include all possible locations (e.g., in time and / or frequency) where a PDCCH may be located. CORESET 1220 may include one or more search spaces, such as a UE-specific search space, a group-common search space, and / or a common search space. A search space may indicate a set of CCE locations where a UE can find a PDCCH that can potentially be used to transmit control information to the UE. The possible locations for the PDCCH may depend on whether the PDCCH is a UE-specific PDCCH (e.g., for a single UE) or a group-common PDCCH (e.g., for multiple UEs), the aggregation level used, etc. Possible locations (e.g., in time and / or frequency) for the PDCCH may be referred to as PDCCH candidates, and the set of all possible PDCCH locations may be referred to as a search space. For example, the set of all possible PDCCH locations for a particular UE may be referred to as a UE-specific search space. Similarly, the set of all possible PDCCH locations across all UEs may be referred to as a common search space. The set of all possible PDCCH locations for a particular group of UEs may be referred to as a group-common search space.

[0129] CORESET 1220 may be interleaved or non-interleaved. An interleaved CORESET 1220 may have a CCE-REG mapping such that adjacent CCEs are mapped to scattered REG bundles in the frequency domain (e.g., adjacent CCEs are not mapped to consecutive REG bundles in CORESET 1220). A non-interleaved CORESET 1220 may have a CCE-REG mapping such that all CCEs are mapped to consecutive REG bundles (e.g., in the frequency domain) in CORESET 1220.

[0130] The base station may transmit repetitions of the DCI over multiple PDCCH monitoring occasions to ensure connection reliability and successful reception of the DCI by the UE. In some cases, the monitoring occasions may be aggregated. Each aggregated set of monitoring occasions may be allocated to one or more CCEs, and the aggregation level may indicate the number of allocated CCEs. Sending repetitions of the DCI over PDCCH monitoring occasions is sometimes referred to as an "extended coverage PDCCH" procedure.

[0131] In a typical implementation, a search space is associated with a single CORESET (configured with frequency allocation and REG bundling and CCE mapping type). Without some form of added diversity, repetition of DCI transmitted over multiple PDCCH monitoring occasions in the search space will result in using the same frequency resources and / or beams for each PDCCH monitoring occasion. This may result in increased blocking probability, interference, and reduced connection reliability. The index of a CCE within the search space (e.g., the location of the CCE) is determined using a hashing function that is a function of the carrier indicator field, slot number, aggregation level, Radio Network Temporary Identifier (RNTI), PDCCH candidate index, and aggregation level.

[0132] In some aspects, the base station 105 may configure the UE 115 with a frequency diversity configuration (or monitoring configuration) that includes repetition of DCI over multiple PDCCH monitoring occasions of a search space. In some aspects, at least two of the PDCCH monitoring occasions may be associated with different frequency resource allocations. In some aspects, a frequency offset may be added to the frequency allocation of the CORESET associated with the search space. In this manner, aspects achieve providing frequency diversity.

[0133] In some aspects, a frequency diversity configuration (or monitoring configuration) may be activated based at least in part on activation of PDCCH monitoring aggregation or based at least in part on a dedicated activation indication. In this manner, the configuration may be deactivated during situations in which frequency diversity may be less beneficial (e.g., when there is less competing traffic, when there are fewer potential sources of interference, etc.) and activated during situations in which frequency diversity may be more beneficial. As a result, aspects may result in more efficient implementation of extended coverage, which may achieve reduced blocking probability, reduced interference, and increased connection reliability.

[0134] As specified in 3GPP 38.213, the set of CCE indices corresponding to the PDCCH candidates in the search space is given by a hashing function: CORESET, the search space set associated with p, s, for the carrier indicator field value, n Cl Slots for the active downlink (DL) bandwidth part (BWP) of the serving cell corresponding to

[0135]

number

[0136] PDCCH candidates in the search space set

[0137]

number

[0138] The CCE index for the aggregation level, L, corresponding to

[0139]

number

[0140] and for any common search space (CSS),

[0141]

number

[0142] and Regarding UE specific search space (USS),

[0143]

number

[0144] , Y p,-1 =n RNTI ≠0, If pmod3=0, A p =39827, pmod3=1 then A p =39829, If pmod3=2, A p = 39839, and D = 65537, i=0, ..., L-1, N CCE,p is CORESET, p, 0~N CCE,p - the number of CCEs numbered 1, n Clis the carrier indicator field value if the UE is configured with the carrier indicator field by CrossCarrierSchedulingConfig for the serving cell whose PDCCH is monitored; otherwise, for any CSS, n Cl = 0,

[0145]

number

[0146] where:

[0147]

number

[0148] is the UE n Cl is the number of PDCCH candidates configured to monitor for the search space set, s, for the serving cell corresponding to L, and For any CSS,

[0149]

number

[0150] and About U.S.S.

[0151]

number

[0152] is the search space set, s is the CCE aggregation level of L, and all the configured n Cl Spanning values

[0153]

number

[0154] is the maximum value of n RNTI The RNTI value used is the Cell RNTI (C-RNTI).

[0155] As a result, if two or more PDCCH monitoring occasions are implemented within a particular slot (e.g., for monitoring by two or more different UEs), the locations of the corresponding CCEs will be the same, which may result in increased PDCCH blocking, increased interference, and reduced connection reliability.

[0156] Various aspects of the techniques and apparatus described herein may facilitate randomizing frequency resources used for CCEs. Aspects may facilitate perturbing a hashing function to create multiple new hashing functions in which the CCE index is a function of the location of the corresponding PDCCH monitoring occasion within a slot, a function of the index of the corresponding PDCCH monitoring occasion, etc. In some aspects, a base station may configure a monitoring configuration indicating multiple hashing functions for identifying one or more CCE indices of a set of PDCCH candidates in a search space. In some aspects, the hashing function may be modified by an additive factor, a multiplicative factor, etc. In this manner, aspects may facilitate providing a hashing function for determining a CCE index as a function of the monitoring occasion location, the monitoring occasion index, etc. As a result, aspects may achieve reduced PDCCH blocking, reduced interference, and increased connection reliability.

[0157] In some aspects, the monitoring configuration may be activated based at least in part on activation of PDCCH monitoring aggregation or based at least in part on a dedicated activation indication. In this manner, the monitoring configuration may be deactivated during situations in which CCE index diversity may be less beneficial (e.g., when there is less competing traffic, when there are fewer potential interference sources, etc.) and activated during situations in which CCE index diversity may be more beneficial. As a result, aspects may result in more efficient implementation of extended coverage, which may achieve reduced blocking probability, reduced interference, and increased connection reliability.

[0158] As noted above, Figure 12 is provided as an example. Other examples may differ from those described with respect to Figure 12.

[0159] 13 is a diagram illustrating an example technique 1300 for hashing function perturbation for PDCCH monitoring aggregation, in accordance with various aspects of the present disclosure. As shown in FIG. 13, the base station 105 and the UE 115 may communicate with each other.

[0160] As indicated by reference numeral 1305, the monitoring configuration may be transmitted by the base station 105 and received by the UE 115. In some aspects, the monitoring configuration may include repetition of DCI over multiple PDCCH monitoring occasions of the search space. In some aspects, the monitoring configuration may indicate multiple hashing functions to identify one or more CCE indices corresponding to one or more CCEs 1310 and 1320 of the set of PDCCH candidates of the search space.

[0161] In some aspects, a hashing function of the plurality of hashing functions may depend on the position of the corresponding PDCCH monitoring occasion 1325 among the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion 1325, and / or a combination thereof. For example, as shown, in some aspects, the hashing function (and therefore the location of the CCE 1310 or 1320) may depend on the position of the corresponding PDCCH monitoring occasion 1325 within the slot 1330. As further shown, the hashing function (and therefore the location of the CCE 1310 or 1320) may depend on the position or index of the corresponding PDCCH monitoring occasion 1325 within the aggregation 1335 of the slot 1330.

[0162] In some aspects, the hashing function may include a prime term multiplied by a modulo function, as described above with respect to FIG. 12. The prime term may include an index associated with the corresponding PDCCH monitoring occasion. In some aspects, the index associated with the corresponding PDCCH monitoring occasion may include an index of an initial symbol of the corresponding PDCCH monitoring occasion, an index of the corresponding PDCCH monitoring occasion, etc.

[0163] According to various aspects, the main term may include a first term including a multiplication factor multiplied by a first variable based at least in part on an RNTI associated with the UE, and a second term based at least in part on a number of PDCCH candidates in the set of PDCCH candidates.

[0164] In some aspects, an index associated with the corresponding PDCCH monitoring occasion may be added to the first and second terms. For example, in some aspects, the hashing function described above with respect to FIG. 12 may be modified by adding an index, K, to the first and second terms to give:

[0165]

number

[0166] In some aspects, the index associated with the corresponding PDCCH monitoring occasion may be multiplied by a multiplicative factor, i.e., for example, A p may be multiplied by an index, K. Any number of other mathematical operations may be performed to modify existing hashing functions and generate new hashing functions in accordance with aspects described herein.

[0167] As indicated by reference numeral 1340, the activation indication may be transmitted by the base station 105 and received by the UE 115. According to various aspects, the activation indication may be carried in a radio resource control (RRC) message configuration, a medium access control (MAC) control element (MAC-CE), a UE-specific DCI, a group-common DCI, etc. As indicated by reference numeral 1345, the activation indication may cause the UE 115 to activate a hashing function from among a plurality of configured hashing functions. In some aspects, the activation indication may cause the UE 115 to activate the hashing function directly or indirectly.

[0168] In some aspects, for example, the activation indication may include a PDCCH monitoring aggregation procedure activation indication. The UE 115 may activate the PDCCH monitoring aggregation procedure based at least in part on the PDCCH monitoring aggregation procedure activation indication. In some aspects, the UE 115 may activate a hashing function from among a plurality of configured hashing functions based at least in part on the activation of the PDCCH monitoring aggregation procedure. In some aspects, the activation indication may include a hashing function perturbation activation indication. The UE 115 may activate the hashing function based at least in part on the hashing function perturbation activation indication.

[0169] The UE 115 may monitor for DCI within a search space associated with multiple PDCCH monitoring occasions based at least in part on the monitoring configuration, as indicated by reference numeral 1350. The DCI may be transmitted by the base station 105 and received by the UE 115, as indicated by reference numeral 1355. In some aspects, the base station 105 may transmit DCI via multiple PDCCH monitoring occasions based at least in part on the monitoring configuration.

[0170] In some aspects, the UE 115 and / or the base station 105 may determine that the parameter satisfies a condition, and the UE 115 may perform PDCCH monitoring based at least in part on the determination that the parameter satisfies the condition. In some aspects, the parameter may indicate a size of a CORESET (e.g., in a number of RBs, a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, etc.) associated with the search space, a size of a bandwidth (e.g., in a number of RBs) associated with the search space, a frequency range associated with the search space, a subcarrier spacing associated with the search space, a search space type (e.g., a UE-specific search space, a common search space, etc.) associated with the search space, etc.

[0171] Various aspects of the techniques and apparatus described herein may facilitate randomizing frequency resources used for CCEs, thereby providing diversity of CCE locations. Aspects may facilitate perturbing hashing functions to create multiple new hashing functions in which the CCE index is a function of the location of the corresponding PDCCH monitoring occasion within a slot, a function of the index of the corresponding PDCCH monitoring occasion, etc. As a result, aspects may result in more efficient implementation of extended coverage, which may achieve reduced blocking probability, reduced interference, and increased connection reliability.

[0172] As noted above, Figure 13 is provided as an example. Other examples may differ from those described with respect to Figure 13.

[0173] 14 illustrates an example 1400 of PDCCH monitoring with frequency diversity, in accordance with various aspects of the present disclosure. As shown in FIG. 14, a base station 105 and a UE 115 may communicate with each other.

[0174] As indicated by reference numeral 1405, a frequency diversity configuration (which may be a monitoring configuration or may be included in the monitoring configuration) may be transmitted by the base station 105 and received by the UE 115. In some aspects, the frequency diversity configuration may include repetition of DCI over multiple PDCCH monitoring occasions of a search space. In some aspects, as shown, at least two PDCCH monitoring occasions 1410 and 1415 of the multiple PDCCH monitoring occasions may be associated with different frequency resource allocations.

[0175] In some aspects, the base station 105 may transmit, and the UE 115 may receive, an indication of a frequency offset 1420 associated with at least one PDCCH monitoring occasion 1415 of the at least two PDCCH monitoring occasions 1410 and 1415. In some aspects, receiving the indication of the frequency offset may include receiving an indication of a frequency allocation of a CORESET associated with the search space. The frequency allocation of the CORESET may indicate the frequency offset. In some aspects, the frequency offset may include a multiple of six resource blocks (RBs).

[0176] In some aspects, the first PDCCH monitoring occasion 1410 may be associated with a first frequency resource allocation, and the second PDCCH monitoring occasion 1415 may be associated with a second frequency resource allocation, as shown. The second frequency resource allocation may indicate a frequency offset 1420. In some aspects, the indication of the frequency offset 1420 may indicate the frequency offset 1420 as a function of an initial symbol of the second PDCCH monitoring occasion 1415 (e.g., as a function of the location of the second PDCCH monitoring occasion 1415 within a slot 1425).

[0177] In some aspects, the frequency diversity configuration may indicate a designated number of PDCCH monitoring occasions per slot, and a frequency offset 1420 may be associated with the designated monitoring occasions per slot. For example, as shown, the frequency offset 1420 may be associated with the second PDCCH monitoring occasion 1415 in each slot 1425. In some aspects, as shown, the frequency diversity configuration may indicate a designated number of PDCCH monitoring occasions 1410 and 1415 per aggregated monitoring occasion 1430. The frequency offset 1420 may be associated with the designated monitoring occasion 1415 per aggregated monitoring occasion 1430. For example, as shown, the frequency offset 1420 may be associated with the second monitoring occasion 1415 of the aggregated monitoring occasion 1430.

[0178] In some aspects, the frequency offset 1420 may be associated with a subset of the plurality of PDCCH monitoring occasions, including the second PDCCH monitoring occasion and at least a third PDCCH monitoring occasion. For example, in some aspects, the frequency offset 1420 may be associated with the second and third PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions.

[0179] As indicated by reference numeral 1435, the activation indication may be transmitted by the base station 105 and received by the UE 115. According to various aspects, the activation indication may be carried in a radio resource control (RRC) message configuration, a medium access control (MAC) control element (MAC-CE), a UE-specific DCI, a group-common DCI, etc. As indicated by reference numeral 1440, the activation indication may cause the UE 115 to activate a frequency diversity configuration. In some aspects, the activation indication may cause the UE 115 to directly or indirectly activate a frequency diversity configuration.

[0180] In some aspects, for example, the activation indication may include a PDCCH monitoring aggregation procedure activation indication. The UE 115 may activate the PDCCH monitoring aggregation procedure based at least in part on the PDCCH monitoring aggregation procedure activation indication. In some aspects, the UE 115 may activate a frequency diversity configuration based at least in part on the activation of the PDCCH monitoring aggregation procedure. In some aspects, the activation indication may include a frequency diversity configuration activation indication. The UE 115 may activate the frequency diversity configuration based at least in part on the frequency diversity configuration activation indication.

[0181] The UE 115 may monitor for DCI within a search space associated with multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration, as indicated by reference numeral 1445. The DCI may be transmitted by the base station 105 and received by the UE 115, as indicated by reference numeral 1450. In some aspects, the base station 105 may transmit DCI via multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0182] In some aspects, the UE 115 and / or the base station 105 may determine that the parameter satisfies a condition, and the UE 115 may perform PDCCH monitoring based at least in part on the determination that the parameter satisfies the condition. In some aspects, the parameter may indicate a size of a CORESET (e.g., in a number of RBs, a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, etc.) associated with the search space, a size of a bandwidth (e.g., in a number of RBs) associated with the search space, a frequency range associated with the search space, a subcarrier spacing associated with the search space, a search space type (e.g., a UE-specific search space, a common search space, etc.) associated with the search space, etc.

[0183] Various aspects of the techniques and apparatus described herein may facilitate providing frequency diversity when utilizing multiple PDCCH monitoring occasions to transmit repetitions of DCI. As a result, aspects may result in more efficient implementation of extended coverage, which may achieve reduced blocking probability, reduced interference, and increased connection reliability.

[0184] As noted above, Figure 14 is provided as an example. Other examples may differ from those described with respect to Figure 14.

[0185] 15 illustrates an example process 1500 performed, for example, by a UE, in accordance with various aspects of the present disclosure. The example process 1500 is an example in which a UE (e.g., UE 115 or 400) performs operations associated with a technique for PDCCH monitoring with frequency diversity.

[0186] 15, in some aspects, process 1500 may include receiving (block 1510) a frequency diversity configuration (which may be or may be included in the monitoring configuration), the frequency diversity configuration including repetition of DCI over multiple PDCCH monitoring occasions of a search space, at least two of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations. For example, a UE (e.g., using processor 402, memory 404, PDCCH monitoring module 408, transceiver 410, etc.) may receive the frequency diversity configuration as described above. In some aspects, UE 115 may include means for receiving the frequency diversity configuration, such as transceiver 410, controller / processor 402, memory 404, PDCCH monitoring module 408, or antenna 416. In some aspects, the frequency diversity configuration includes repetition of DCI over multiple PDCCH monitoring occasions of a search space. In some aspects, at least two PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations.

[0187] 15, in some aspects, the process 1500 may include monitoring for DCI within a search space associated with a plurality of PDCCH monitoring occasions based at least in part on a frequency diversity configuration (block 1520). For example, the UE (e.g., using the transceiver 410, the controller / processor 402, the memory 404, the PDCCH monitoring module 408, etc.) may monitor for DCI within a search space associated with a plurality of PDCCH monitoring occasions based at least in part on a frequency diversity configuration, as described above. In some aspects, the UE 115 may include means for monitoring for DCI, such as the transceiver 410, the controller / processor 402, the memory 404, the PDCCH monitoring module 408, or the antenna 416.

[0188] Process 1500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or with respect to one or more other processes described elsewhere herein.

[0189] In a first aspect, at least two PDCCH monitoring occasions are associated with different frequency resource allocations based at least in part on a PDCCH monitoring aggregation procedure.

[0190] In a second aspect, alone or in combination with the first aspect, the process 1500 includes receiving an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the at least two PDCCH monitoring occasions.

[0191] In a third aspect, alone or in combination with one or more of the first and second aspects, receiving an indication of a frequency offset includes receiving an indication of a frequency allocation of a CORESET associated with the search space, wherein the frequency allocation of the CORESET indicates the frequency offset.

[0192] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the frequency offset comprises a multiple of 6 RBs.

[0193] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, a first PDCCH monitoring occasion of the at least two PDCCH monitoring occasions is associated with a first frequency resource allocation, and a second PDCCH monitoring occasion of the at least two PDCCH monitoring occasions is associated with a second frequency resource allocation, the second frequency resource allocation indicating a frequency offset, and the indication of the frequency offset indicating a frequency offset according to an initial symbol of the second PDCCH monitoring occasion.

[0194] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the frequency offset is associated with a subset of the plurality of PDCCH monitoring occasions including a second PDCCH monitoring occasion and at least a third PDCCH monitoring occasion.

[0195] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the frequency diversity configuration indicates a specified number of PDCCH monitoring occasions per slot, and a frequency offset is associated with the specified monitoring occasions per slot.

[0196] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the frequency diversity configuration indicates a specified number of PDCCH monitoring occasions per aggregated monitoring occasion, and a frequency offset is associated with the specified monitoring occasions per aggregated monitoring occasion.

[0197] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the process 1500 includes activating a PDCCH monitoring aggregation procedure and activating a frequency diversity configuration based at least in part on the activation of the PDCCH monitoring aggregation procedure.

[0198] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the process 1500 includes receiving a PDCCH monitoring aggregation procedure activation indication, where activation of the PDCCH monitoring aggregation procedure is based at least in part on the PDCCH monitoring aggregation procedure activation indication.

[0199] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the PDCCH monitoring aggregation procedure activation indication is carried in at least one of an RRC message configuration, a MAC-CE, a UE-specific DCI, a group-common DCI, or a combination thereof.

[0200] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the process 1500 includes receiving a frequency diversity configuration activation instruction and activating a frequency diversity configuration based at least in part on the frequency diversity configuration activation instruction.

[0201] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the frequency diversity configuration activation indication is carried in at least one of an RRC message configuration, a MAC-CE, a UE-specific DCI, a group-common DCI, or a combination thereof.

[0202] In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, the process 1500 includes determining that a parameter satisfies a condition, and monitoring for DCI within a search space associated with a plurality of PDCCH monitoring occasions based at least in part on a frequency diversity configuration is determined at least in part on the determination that the parameter satisfies a condition.

[0203] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the parameter indicates at least one of a size of a CORESET associated with the search space, a size of a bandwidth associated with the search space, a frequency range associated with the search space, a subcarrier spacing associated with the search space, a search space type associated with the search space, or a combination thereof.

[0204] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the size of the CORESET includes at least one of the number of RBs, the number of OFDM symbols, or a combination thereof.

[0205] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the size of the bandwidth includes the number of RBs.

[0206] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, the search space type includes a UE-specific search space or a common search space.

[0207] 15 illustrates example blocks of process 1500, in some aspects process 1500 may include additional, fewer, different, or differently arranged blocks compared to the blocks illustrated in FIG 15. Additionally or alternatively, two or more of the blocks of process 1500 may be performed in parallel.

[0208] 16 illustrates an example process 1600 performed, for example, by a base station, in accordance with various aspects of the present disclosure. The example process 1600 is an example of a base station (e.g., base station 105, 500, etc.) performing operations associated with a technique for PDCCH monitoring with frequency diversity.

[0209] 16, in some aspects, the process 1600 may include transmitting (block 1610) a frequency diversity configuration (which may be or may be included in the monitoring configuration) to the UE 115, the frequency diversity configuration including repetition of DCI over multiple PDCCH monitoring occasions of a search space, at least two of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations. For example, the base station (e.g., using the transceiver 510, the controller / processor 502, the memory 504, etc.) may transmit the frequency diversity configuration to the UE 115 as described above. In some aspects, the base station 105 may include means for transmitting the frequency diversity configuration, such as the controller / processor 502, the transceiver 510, the DL control channel module 508, or the antenna 516. In some aspects, the frequency diversity configuration includes repetition of DCI over multiple PDCCH monitoring occasions of a search space. In some aspects, at least two PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations.

[0210] 16, in some aspects, the process 1600 may include transmitting the DCI over multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration (block 1620). For example, the base station (e.g., using the transceiver 510, the controller / processor 502, the memory 504, the DL control channel module 508, etc.) may transmit the DCI over multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration, as described above. In some aspects, the base station may include means for transmitting the DCI, such as the controller / processor 502, the transceiver 510, the DL control channel module 508, or the antenna 516.

[0211] Process 1600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or with respect to one or more other processes described elsewhere herein.

[0212] In a first aspect, at least two PDCCH monitoring occasions are associated with different frequency resource allocations based at least in part on a PDCCH monitoring aggregation procedure.

[0213] In a second aspect, alone or in combination with the first aspect, the process 1600 includes transmitting an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the at least two PDCCH monitoring occasions.

[0214] In a third aspect, alone or in combination with one or more of the first and second aspects, transmitting an indication of the frequency offset includes transmitting an indication of a frequency allocation of a CORESET associated with the search space, the frequency allocation of the CORESET indicating the frequency offset.

[0215] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the frequency offset comprises a multiple of 6 RBs.

[0216] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, a first PDCCH monitoring occasion of the at least two PDCCH monitoring occasions is associated with a first frequency resource allocation, and a second PDCCH monitoring occasion of the at least two PDCCH monitoring occasions is associated with a second frequency resource allocation.

[0217] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the frequency offset is associated with a subset of the plurality of PDCCH monitoring occasions including a second PDCCH monitoring occasion and at least a third PDCCH monitoring occasion.

[0218] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the frequency diversity configuration indicates a specified number of PDCCH monitoring occasions per slot, and a frequency offset is associated with the specified monitoring occasions per slot.

[0219] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the frequency diversity configuration indicates a specified number of PDCCH monitoring occasions per aggregated monitoring occasion, and a frequency offset is associated with the specified monitoring occasions per aggregated monitoring occasion.

[0220] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the process 1600 includes transmitting a PDCCH monitoring aggregation procedure activation indication, the PDCCH monitoring aggregation procedure activation indication being for causing activation of a PDCCH monitoring aggregation procedure, and wherein a frequency diversity configuration is activated based at least in part on the activation of the PDCCH monitoring aggregation procedure.

[0221] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the PDCCH monitoring aggregation procedure activation indication is carried in at least one of an RRC message configuration, a MAC-CE, a UE-specific DCI, a group-common DCI, or a combination thereof.

[0222] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the process 1600 includes transmitting a frequency diversity configuration activation instruction, the frequency diversity configuration activation instruction being for causing activation of a frequency diversity configuration.

[0223] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the frequency diversity configuration activation indication is carried in at least one of an RRC message configuration, a MAC-CE, a UE-specific DCI, a group-common DCI, or a combination thereof.

[0224] In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the process 1600 includes determining that a parameter satisfies a condition, and monitoring for DCI within a search space associated with a plurality of PDCCH monitoring occasions based at least in part on a frequency diversity configuration is determined at least in part on the determination that the parameter satisfies a condition.

[0225] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the parameter indicates at least one of a size of a CORESET associated with the search space, a size of a bandwidth associated with the search space, a frequency range associated with the search space, a subcarrier spacing associated with the search space, a search space type associated with the search space, or a combination thereof.

[0226] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the size of the CORESET includes at least one of the number of RBs, the number of OFDM symbols, or a combination thereof.

[0227] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the size of the bandwidth includes the number of RBs.

[0228] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the search space type includes a UE-specific search space or a common search space.

[0229] 16 illustrates example blocks of process 1600, in some aspects process 1600 may include additional, fewer, different, or differently arranged blocks compared to the blocks illustrated in FIG 16. Additionally or alternatively, two or more of the blocks of process 1600 may be performed in parallel.

[0230] 17 illustrates an example process 1700 performed, for example, by a UE, in accordance with various aspects of the present disclosure. The example process 1700 is an example in which a UE (e.g., UE 115, 400, etc.) performs operations associated with a technique for hashing function perturbation for PDCCH monitoring aggregation.

[0231] 17, in some aspects, the process 1700 may include receiving (block 1710) a monitoring configuration, the monitoring configuration including iterations of a DCI over multiple PDCCH monitoring occasions of a search space, the monitoring configuration indicating multiple hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, a hashing function of the multiple hashing functions depending on at least one of a position of a corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof. For example, the UE (e.g., using the transceiver 410, the controller / processor 402, the memory 404, the PDCCH monitoring module 408, etc.) may receive the monitoring configuration as described above. In some aspects, the UE 115 may include means for receiving the monitoring configuration, such as the transceiver 410, the controller / processor 402, the memory 404, the PDCCH monitoring module 408, or the antenna 416. In some aspects, the monitoring configuration includes iteration of the DCI over multiple PDCCH monitoring occasions of the search space. In some aspects, the monitoring configuration indicates multiple hashing functions for identifying one or more CCE indices of the set of PDCCH candidates of the search space. In some aspects, a hashing function of the multiple hashing functions depends on at least one of a position of a corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof.

[0232] 17, in some aspects, the process 1700 may include monitoring for DCI within a search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function (block 1720). For example, the UE 115 (e.g., using the transceiver 410, the controller / processor 402, the memory 404, the PDCCH monitoring module 408, etc.) may monitor for DCI within a search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function, as described above. In some aspects, the UE 115 may include means for monitoring for DCI, such as the transceiver 410, the controller / processor 402, the memory 404, the PDCCH monitoring module 408, or the antenna 416.

[0233] Process 1700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or with respect to one or more other processes described elsewhere herein.

[0234] In a first aspect, the hashing function depends on the position of the corresponding PDCCH monitoring occasion within the slot.

[0235] In a second aspect, alone or in combination with the first aspect, the hashing function includes a leading term that is multiplied by a modulo function, the leading term including an index associated with the corresponding PDCCH monitoring occasion.

[0236] In a third aspect, alone or in combination with one or more of the first and second aspects, the index associated with the corresponding PDCCH monitoring occasion includes an index of an initial symbol of the corresponding PDCCH monitoring occasion, an index of the corresponding PDCCH monitoring occasion, or a combination thereof.

[0237] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the main term includes a first term including a multiplication coefficient that is multiplied by a first variable that is based at least in part on an RNTI associated with the UE, and a second term that is based at least in part on a number of PDCCH candidates in the set of PDCCH candidates.

[0238] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, an index associated with a corresponding PDCCH monitoring occasion is added to the first term and the second term.

[0239] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, an index associated with a corresponding PDCCH monitoring occasion is multiplied by a multiplicative factor.

[0240] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the process 1700 includes activating a PDCCH monitoring aggregation procedure and activating a hashing function based at least in part on the activation of the PDCCH monitoring aggregation procedure.

[0241] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the process 1700 includes receiving a PDCCH monitoring aggregation procedure activation indication, where activation of the PDCCH monitoring aggregation procedure is based at least in part on the PDCCH monitoring aggregation procedure activation indication.

[0242] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the PDCCH monitoring aggregation procedure activation indication is carried in at least one of an RRC message configuration, a MAC-CE, a UE-specific DCI, a group-common DCI, or a combination thereof.

[0243] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, a process 1700 includes receiving a hashing function perturbation activation instruction and activating a hashing function based at least in part on the hashing function perturbation activation instruction.

[0244] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the hashing function perturbation activation indication is carried in at least one of an RRC message configuration, a MAC-CE, a UE-specific DCI, a group-common DCI, or a combination thereof.

[0245] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the process 1700 includes determining that a parameter satisfies a condition, and determining, based at least in part on the hashing function, to monitor for DCI in a search space associated with a plurality of PDCCH monitoring occasions.

[0246] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the parameter indicates at least one of a size of a CORESET associated with the search space, a frequency range associated with the search space, a subcarrier spacing associated with the search space, or a combination thereof.

[0247] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the size of the CORESET includes at least one of the number of RBs, the number of OFDM symbols, or a combination thereof.

[0248] 17 illustrates example blocks of process 1700, in some aspects process 1700 may include additional, fewer, different, or differently arranged blocks compared to the blocks illustrated in FIG 17. Additionally or alternatively, two or more of the blocks of process 1700 may be performed in parallel.

[0249] 18 illustrates an example process 1800 performed, for example, by a base station, in accordance with various aspects of the present disclosure. The example process 1800 is an example of a base station (e.g., base station 105, 500, etc.) performing operations associated with a technique for hashing function perturbation for PDCCH monitoring aggregation.

[0250] 18, in some aspects, the process 1800 may include transmitting (block 1810) a monitoring configuration to the UE 115, where the monitoring configuration includes iterations of a DCI over multiple PDCCH monitoring occasions of a search space, where the monitoring configuration indicates multiple hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, where a hashing function of the multiple hashing functions depends on at least one of a position of a corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof. For example, the base station 105 (e.g., using the transceiver 510, the controller / processor 502, the memory 504, the DL control channel module 508, etc.) may transmit the monitoring configuration to the UE 115 as described above. In some aspects, the base station 105 may include means for transmitting the monitoring configuration, such as the controller / processor 502, the transceiver 510, the DL control channel module 508, or the antenna 516. In some aspects, the monitoring configuration includes iteration of the DCI over multiple PDCCH monitoring occasions of the search space. In some aspects, the monitoring configuration indicates multiple hashing functions for identifying one or more CCE indices of the set of PDCCH candidates of the search space. In some aspects, a hashing function of the multiple hashing functions depends on at least one of a position of a corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof.

[0251] 18, in some aspects, the process 1800 may include transmitting the DCI within a search space associated with the multiple PDCCH monitoring occasions based at least in part on the hashing function (block 1820). For example, the base station 105 (e.g., using the transceiver 510, the controller / processor 502, the memory 504, etc.) may transmit the DCI within a search space associated with the multiple PDCCH monitoring occasions based at least in part on the hashing function, as described above. In some aspects, the base station may include means for transmitting the DCI, such as the controller / processor 502, the transceiver 510, the DL control channel module 508, or the antenna 516.

[0252] Process 1800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or with respect to one or more other processes described elsewhere herein.

[0253] In a first aspect, the hashing function depends on the position of the corresponding PDCCH monitoring occasion within the slot.

[0254] In a second aspect, alone or in combination with the first aspect, the hashing function includes a leading term that is multiplied by a modulo function, the leading term including an index associated with the corresponding PDCCH monitoring occasion.

[0255] In a third aspect, alone or in combination with one or more of the first and second aspects, the index associated with the corresponding PDCCH monitoring occasion includes an index of an initial symbol of the corresponding PDCCH monitoring occasion, an index of the corresponding PDCCH monitoring occasion, or a combination thereof.

[0256] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the main term includes a first term including a multiplication coefficient that is multiplied by a first variable that is based at least in part on an RNTI associated with the UE, and a second term that is based at least in part on a number of PDCCH candidates in the set of PDCCH candidates.

[0257] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, an index associated with a corresponding PDCCH monitoring occasion is added to the first term and the second term.

[0258] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, an index associated with a corresponding PDCCH monitoring occasion is multiplied by a multiplicative factor.

[0259] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the process 1800 includes transmitting a PDCCH monitoring aggregation procedure activation indication, where the PDCCH monitoring aggregation procedure activation indication is for causing activation of a PDCCH monitoring aggregation procedure, and where a hashing function is activated based at least in part on the activation of the PDCCH monitoring aggregation procedure.

[0260] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the PDCCH monitoring aggregation procedure activation indication is carried in at least one of an RRC message configuration, a MAC-CE, a UE-specific DCI, a group-common DCI, or a combination thereof.

[0261] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the process 1800 includes transmitting a hashing function perturbation activation instruction, the hashing function perturbation activation instruction being for causing activation of a hashing function.

[0262] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the hashing function perturbation activation indication is carried in at least one of an RRC message configuration, a MAC-CE, a UE-specific DCI, a group-common DCI, or a combination thereof.

[0263] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the process 1800 includes determining that a parameter satisfies a condition, and determining, based at least in part on the hashing function, to monitor for DCI in a search space associated with a plurality of PDCCH monitoring occasions.

[0264] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the parameter indicates at least one of a size of a CORESET associated with the search space, a frequency range associated with the search space, a subcarrier spacing associated with the search space, or a combination thereof.

[0265] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the size of the CORESET includes at least one of the number of RBs, the number of OFDM symbols, or a combination thereof.

[0266] 18 illustrates example blocks of process 1800, in some aspects process 1800 may include additional, fewer, different, or differently arranged blocks compared to the blocks illustrated in FIG 18. Additionally or alternatively, two or more of the blocks of process 1800 may be performed in parallel.

[0267] In some aspects, a method of wireless communication performed by a user equipment (UE) includes receiving a frequency diversity configuration, the frequency diversity configuration including repetition of downlink control information (DCI) over multiple physical downlink control channel (PDCCH) monitoring occasions of a search space, at least two PDCCH monitoring occasions of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations; and monitoring for DCI in the search space associated with the multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0268] In some aspects, a method of wireless communication performed by a base station includes transmitting a frequency diversity configuration to a UE, the frequency diversity configuration including repetition of DCI over multiple PDCCH monitoring occasions of a search space, at least two PDCCH monitoring occasions of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations; and transmitting the DCI over the multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0269] In some aspects, a UE for wireless communication includes a memory and one or more processors operably coupled to the memory, wherein the memory and the one or more processors are configured to receive a frequency diversity configuration, the frequency diversity configuration including repetition of DCI over multiple PDCCH monitoring occasions of a search space, at least two PDCCH monitoring occasions of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations; and monitor for DCI in the search space associated with the multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0270] In some aspects, a base station for wireless communication includes a memory and one or more processors operatively coupled to the memory, wherein the memory and the one or more processors are configured to: transmit a frequency diversity configuration to a UE, the frequency diversity configuration including repetition of DCI over multiple PDCCH monitoring occasions of a search space, at least two PDCCH monitoring occasions of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations; and transmit the DCI over the multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0271] In certain aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive a frequency diversity configuration, the frequency diversity configuration including repetition of DCI over multiple PDCCH monitoring occasions of a search space, at least two PDCCH monitoring occasions of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations; and monitor for DCI in the search space associated with the multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0272] In certain aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communications includes one or more instructions that, when executed by one or more processors at a base station, cause the base station to: transmit a frequency diversity configuration to a UE, the frequency diversity configuration including repetition of DCI over multiple PDCCH monitoring occasions of a search space, at least two PDCCH monitoring occasions of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations; and transmit the DCI over the multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0273] In certain aspects, an apparatus for wireless communication includes means for receiving a frequency diversity configuration, the frequency diversity configuration including repetition of DCI over a plurality of PDCCH monitoring occasions of a search space, at least two PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions being associated with different frequency resource allocations; and means for monitoring for DCI in the search space associated with the plurality of PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0274] In certain aspects, an apparatus for wireless communication includes means for transmitting a frequency diversity configuration to a UE, the frequency diversity configuration including repetition of DCI over multiple PDCCH monitoring occasions of a search space, at least two PDCCH monitoring occasions of the multiple PDCCH monitoring occasions being associated with different frequency resource allocations; and means for transmitting the DCI over the multiple PDCCH monitoring occasions based at least in part on the frequency diversity configuration.

[0275] In some aspects, a method of wireless communication performed by a user equipment (UE) includes receiving a monitoring configuration, the monitoring configuration including iterations of downlink control information (DCI) over a plurality of physical downlink control channel (PDCCH) monitoring occasions of a search space, the monitoring configuration indicating a plurality of hashing functions for identifying one or more control channel element (CCE) indices of a set of PDCCH candidates of the search space, a hashing function of the plurality of hashing functions being dependent on at least one of a position of a corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; and monitoring for DCI in the search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function.

[0276] In some aspects, a method of wireless communication performed by a base station includes transmitting a monitoring configuration to a UE, the monitoring configuration including iteration of DCI over a plurality of PDCCH monitoring occasions of a search space, the monitoring configuration indicating a plurality of hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, a hashing function of the plurality of hashing functions depending on at least one of a position of a corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; and transmitting DCI in the search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function.

[0277] In some aspects, a UE for wireless communication includes a memory and one or more processors operably coupled to the memory, wherein the memory and the one or more processors are configured to receive a monitoring configuration, the monitoring configuration including iteration of DCI over a plurality of PDCCH monitoring occasions of a search space, the monitoring configuration indicating a plurality of hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, a hashing function of the plurality of hashing functions depending on at least one of a position of a corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; and monitor for DCI in the search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function.

[0278] In some aspects, a base station for wireless communication includes a memory and one or more processors operatively coupled to the memory, wherein the memory and the one or more processors are configured to: transmit a monitoring configuration to a UE, the monitoring configuration including iteration of DCI over a plurality of PDCCH monitoring occasions of a search space, the monitoring configuration indicating a plurality of hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, the hashing function of the plurality of hashing functions being dependent on at least one of a position of a corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; and transmit the DCI in the search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function.

[0279] In certain aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive a monitoring configuration, the monitoring configuration including iteration of DCI through a plurality of PDCCH monitoring occasions of a search space, the monitoring configuration indicating a plurality of hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, a hashing function of the plurality of hashing functions depending on at least one of a position of a corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; and monitor for DCI in the search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function.

[0280] In certain aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communications includes one or more instructions that, when executed by one or more processors of a base station, cause the base station to: transmit a monitoring configuration to a UE, the monitoring configuration including iteration of DCI over multiple PDCCH monitoring occasions of a search space, the monitoring configuration indicating multiple hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, the hashing function of the multiple hashing functions being dependent on at least one of a position of a corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; and transmit the DCI in the search space associated with the multiple PDCCH monitoring occasions based at least in part on the hashing function.

[0281] In certain aspects, an apparatus for wireless communication includes means for receiving a monitoring configuration, the monitoring configuration including iteration of DCI over a plurality of PDCCH monitoring occasions of a search space, the monitoring configuration indicating a plurality of hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, a hashing function of the plurality of hashing functions depending on at least one of a position of a corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; and means for monitoring for DCI in the search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function.

[0282] In certain aspects, an apparatus for wireless communication includes means for transmitting a monitoring configuration to a UE, the monitoring configuration including iterations of DCI over a plurality of PDCCH monitoring occasions of a search space, the monitoring configuration indicating a plurality of hashing functions for identifying one or more CCE indices of a set of PDCCH candidates of the search space, a hashing function of the plurality of hashing functions depending on at least one of a position of a corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof; and means for transmitting the DCI in the search space associated with the plurality of PDCCH monitoring occasions based at least in part on the hashing function.

[0283] In some aspects, a method of wireless communication includes receiving, by a user equipment (UE), a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The method further includes monitoring, by the UE, a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions based on the monitoring configuration.

[0284] In some aspects, a method of wireless communication includes transmitting, by a base station (BS), a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The method further includes indicating, by the BS to a UE based on the monitoring configuration, to commence monitoring of a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The method further includes transmitting, by the BS to the UE, a PDCCH transmission in at least one of the first CORESET and the second CORESET.

[0285] In some aspects, the first wireless communication device includes a transceiver configured to receive from a second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to each monitoring occasion from a plurality of monitoring occasions, the first and second CORESETs being different from one another. The wireless communication device further includes a transceiver configured to receive from the second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to each monitoring occasion from the plurality of monitoring occasions, the first and second CORESETs being different from one another.

[0286] In some aspects, the first wireless communication device includes a transceiver configured to transmit a monitoring configuration to a second wireless communication device, the monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The transceiver is further configured to indicate to the second wireless communication device, based on the monitoring configuration, to begin monitoring a search space including the plurality of monitoring occasions for a physical downlink control channel (PDCCH) transmission. The transceiver is further configured to transmit a PDCCH transmission in at least one of the first CORESET and the second CORESET.

[0287] In some aspects, a non-transitory computer-readable medium has program code recorded thereon, the program code including code for causing a first wireless communication device to receive from a second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from a plurality of monitoring occasions, the first and second CORESETs being different from each other. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to monitor a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions based on the monitoring configuration.

[0288] In some aspects, a non-transitory computer-readable medium has program code recorded thereon, the program code including code for causing a first wireless communication device to transmit to a second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, wherein the first and second CORESETs are different from each other. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to indicate to the second wireless communication device to begin monitoring a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions based on the monitoring configuration. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to transmit a PDCCH transmission in at least one of the first CORESET and the second CORESET.

[0289] In some aspects, the first wireless communication device comprises means for receiving from the second wireless communication device a monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from one another. The first wireless communication device further comprises means for monitoring a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions based on the monitoring configuration.

[0290] In some aspects, the first wireless communication device comprises means for transmitting a monitoring configuration to a second wireless communication device, the monitoring configuration specifying a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first and second CORESETs being different from each other. The first wireless communication device further comprises means for indicating to the second wireless communication device, based on the monitoring configuration, to begin monitoring a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The first wireless communication device further comprises means for transmitting PDCCH transmissions in at least one of the first CORESET and the second CORESET to the second wireless communication device.

[0291] Further aspects of the present disclosure include the following. 1. A method of wireless communication comprising: receiving, by a user equipment (UE), a monitoring configuration, the monitoring configuration including repetition of downlink control information (DCI) over multiple physical downlink control channel (PDCCH) monitoring occasions of a search space and indicating a diversity parameter that provides diversity among the multiple PDCCH monitoring occasions; monitoring, by the UE, for DCI in a search space associated with a plurality of PDCCH monitoring occasions according to a diversity parameter based on a monitoring configuration; A method comprising: 2. The diversity parameter is a frequency resource allocation difference between multiple PDCCH monitoring occasions; the control resource set (CORESET) allocation difference between multiple PDCCH monitoring occasions, or and at least one of different hashing function allocations among a plurality of PDCCH monitoring occasions, each hashing function being used to identify one or more control channel element (CCE) indices of a set of PDCCH candidates in the search space, the hashing function depending on a value associated with a corresponding PDCCH monitoring occasion from among the plurality of PDCCH monitoring occasions. The method of embodiment 1. 3. The method of any of aspects 1-2, wherein a first CORESET for a first PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a first frequency range, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second frequency range, and the first and second frequency ranges are different from each other. 4. The method of any of aspects 1-3, wherein a first CORESET for a first PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a first resource element group (REG) bundling, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second REG bundling, and the first and second REG bundlings are different from each other. 5. The method of any of aspects 1-4, wherein at least two PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations based at least in part on a PDCCH monitoring aggregation procedure. 6. The method of any of aspects 1-5, further comprising receiving an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions. 7. The hashing function is the position of the corresponding PDCCH monitoring occasion among a plurality of PDCCH monitoring occasions; or An index associated with the corresponding PDCCH monitoring occasion The method of any of aspects 2 to 6, wherein the method relies on at least one of the following: 8. The method of any of aspects 2-7, wherein the hashing function depends on the position of the corresponding PDCCH monitoring occasion within the slot. 9. A method of wireless communication comprising: transmitting, by a base station (BS), a monitoring configuration, the monitoring configuration including repetition of downlink control information (DCI) over multiple physical downlink control channel (PDCCH) monitoring occasions of a search space and indicating a diversity parameter that provides diversity among the multiple PDCCH monitoring occasions; transmitting, by the BS, DCI within a search space associated with a plurality of PDCCH monitoring occasions according to a diversity parameter based on the monitoring configuration; A method comprising: 10. The diversity parameter is a frequency resource allocation difference between multiple PDCCH monitoring occasions; the control resource set (CORESET) allocation difference between multiple PDCCH monitoring occasions, or and at least one of different hashing function allocations among a plurality of PDCCH monitoring occasions, each hashing function being used to identify one or more control channel element (CCE) indices of a set of PDCCH candidates in the search space, the hashing function depending on a value associated with a corresponding PDCCH monitoring occasion from among the plurality of PDCCH monitoring occasions. The method of embodiment 9. 11. The method of any of aspects 9-10, wherein a first CORESET for a first PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a first frequency range, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second frequency range, and the first and second frequency ranges are different from each other. 12. The method of any of aspects 9-11, wherein a first CORESET for a first PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a first resource element group (REG) bundling, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second REG bundling, and the first and second REG bundlings are different from each other. 13. The method of any of aspects 9-12, wherein at least two PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations based at least in part on a PDCCH monitoring aggregation procedure. 14. The method of any of aspects 9-13, further comprising transmitting an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions. 15. The hashing function is the position of the corresponding PDCCH monitoring occasion among a plurality of PDCCH monitoring occasions; or An index associated with the corresponding PDCCH monitoring occasion 15. The method of any of aspects 10 to 14, wherein the method relies on at least one of: 16. The method of any of aspects 10-15, wherein the hashing function depends on the position of the corresponding PDCCH monitoring occasion within the slot. 17. A user equipment (UE), comprising: a transceiver configured to receive a monitoring configuration, the monitoring configuration including repetition of downlink control information (DCI) over multiple physical downlink control channel (PDCCH) monitoring occasions of a search space and indicating a diversity parameter that provides diversity among the multiple PDCCH monitoring occasions; a processor configured to monitor for DCI within a search space associated with a plurality of PDCCH monitoring occasions according to a diversity parameter based on the monitoring configuration; A UE equipped with: 18. The diversity parameter is a frequency resource allocation difference between multiple PDCCH monitoring occasions; the control resource set (CORESET) allocation difference between multiple PDCCH monitoring occasions, or and at least one of different hashing function allocations among a plurality of PDCCH monitoring occasions, each hashing function being used to identify one or more control channel element (CCE) indices of a set of PDCCH candidates in the search space, the hashing function depending on a value associated with a corresponding PDCCH monitoring occasion from among the plurality of PDCCH monitoring occasions. UE of embodiment 17. 19. The UE of any of aspects 17-18, wherein a first CORESET for a first PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a first frequency range, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second frequency range, and the first and second frequency ranges are different from each other. 20. The UE of any of aspects 17-19, wherein a first CORESET for a first PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a first resource element group (REG) bundling, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second REG bundling, and the first and second REG bundlings are different from each other. 21. The UE of any of aspects 17-20, wherein at least two PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations based at least in part on a PDCCH monitoring aggregation procedure. 22. The UE of any of aspects 17-21, wherein the transceiver is further configured to receive an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions. 23. The hashing function is the position of the corresponding PDCCH monitoring occasion among a plurality of PDCCH monitoring occasions; or An index associated with the corresponding PDCCH monitoring occasion 23. The UE of any of aspects 18 to 22, depending on at least one of: 24. A base station (BS), a transceiver, transmitting a monitoring configuration, the monitoring configuration including repetition of downlink control information (DCI) over multiple physical downlink control channel (PDCCH) monitoring occasions of a search space and indicating a diversity parameter that provides diversity among the multiple PDCCH monitoring occasions; transmitting DCI within a search space associated with a plurality of PDCCH monitoring occasions according to a diversity parameter based on the monitoring configuration; configured to do, BS. 25. The diversity parameter is a frequency resource allocation difference between multiple PDCCH monitoring occasions; the control resource set (CORESET) allocation difference between multiple PDCCH monitoring occasions, or and at least one of different hashing function allocations among a plurality of PDCCH monitoring occasions, each hashing function being used to identify one or more control channel element (CCE) indices of a set of PDCCH candidates in the search space, the hashing function depending on a value associated with a corresponding PDCCH monitoring occasion from among the plurality of PDCCH monitoring occasions. Aspect 24 BS. 26. The BS of any of aspects 24-25, wherein a first CORESET for a first PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a first frequency range, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second frequency range, and the first and second frequency ranges are different from each other. 27. The BS of any of aspects 24-26, wherein a first CORESET for a first PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a first resource element group (REG) bundling, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second REG bundling, and the first and second REG bundlings are different from each other. 28. The BS of any of aspects 24-27, wherein at least two PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations based at least in part on a PDCCH monitoring aggregation procedure. 29. The BS of any of aspects 24-28, wherein the transceiver is further configured to transmit an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions. 30. The hashing function is the position of the corresponding PDCCH monitoring occasion among a plurality of PDCCH monitoring occasions; or An index associated with the corresponding PDCCH monitoring occasion 30. The BS of any one of aspects 25 to 29, wherein the BS depends on at least one of the following:

[0292] Information and signals may be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0293] The various example blocks and modules described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0294] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed so that portions of the functions are implemented in different physical locations. Also, as used herein, including in the claims, "or" used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such as, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0295] As those skilled in the art will now appreciate, and depending on the particular application at hand, many modifications, substitutions, and variations can be made in and to the materials, arrangements, constructions, and methods of use of the devices of the present disclosure without departing from the spirit and scope of the present disclosure. In light of this, and since the specific embodiments shown and described herein are by way of example only, the scope of the present disclosure should not be limited to the scope of such specific embodiments, but rather should be fully equivalent to the scope of the following appended claims and their functional equivalents. [Explanation of symbols]

[0296] 100 Wireless communication network, network 105 Base station (BS), BS 105a, 105b, 105c BS 105d, 105e BS, Macro BS 105f BS, small cell BS 115, 115a~115k UE 200 Transmission Frame Structure, Structure 202 radio frames 204 Subframe 206 slots, starting slots 212 CORESET 214 CORESET 216 symbols, first symbol 218 Subcarriers 220 Resource Element (RE), RE 300 Transmission Frame Structure, Structure 302 Radio Frame 304 Subframe 306 Slots 312 CORESET, 1st CORESET 314 CORESET, 2nd CORESET 316 OFDM symbols 318 Subcarrier 320 RE 322 Aggregated Observation Occasions 400 UE 402 Processor, Controller / Processor 404 Memory 406 Command 408 PDCCH monitoring module 410 Transceiver 412 Modem Subsystem 414 Radio Frequency (RF) Unit, RF Unit 416 Antenna 500 BS 502 Processor, Controller / Processor 504 memory 506 Command 508 DL control channel module, base station DL control channel module 510 Transceiver 512 Modem Subsystem 514 RF unit 516 Antenna 600 Communication methods, methods, methods 602 First Device 604 Second Device 700 Communication methods, methods, methods 702 First Device 704 Second Device 800 Communication methods, methods, methods 802 First Device 804 Second Device 806 Third Device 900 ways 1000 ways 1100 methods 1110 Monitoring Configuration 1200 Resource Structure 1205 subframe 1210 Slots 1215 Symbol 1220 Control Resource Set (CORESET), CORESET 1225 Control Channel Element (CCE), CCE 1230 Resource Element Group (REG), REG 1235 Resource Element (RE), Resource Element 1300 examples 1310 CCE 1320 CCE 1325 corresponding PDCCH monitoring occasions 1330 Slots 1335 Aggregation 1400 examples 1410 PDCCH monitoring occasion, first PDCCH monitoring occasion 1415 PDCCH monitoring occasion, second PDCCH monitoring occasion 1420 Frequency Offset 1425 Slots 1430 Aggregated Observation Occasions 1500 processes 1600 processes 1700 processes 1800 processes

Claims

1. 1. A method of wireless communication, comprising: receiving, by a user equipment (UE), a monitoring configuration, the monitoring configuration including repetition of downlink control information (DCI) over multiple physical downlink control channel (PDCCH) monitoring occasions of a same search space, the multiple PDCCH monitoring occasions including a first PDCCH monitoring occasion and a second PDCCH monitoring occasion different from the first PDCCH monitoring occasion, the monitoring configuration identifying at least a first control resource set (CORESET) corresponding to the first PDCCH monitoring occasion and a second CORESET different from the first CORESET, the second CORESET corresponding to the second PDCCH monitoring occasion, the first CORESET associated with a first transmission control indicator (TCI) state, and the second CORESET associated with a second TCI state different from the first TCI state; monitoring, by the UE, for the DCI in the same search space associated with the multiple PDCCH monitoring occasions based on the monitoring configuration; Contains method.

2. The monitoring configuration: a frequency resource allocation difference between the plurality of PDCCH monitoring occasions; or Allocating different hashing functions among the multiple PDCCH monitoring occasions and a diversity parameter including at least one of: if the diversity parameters include different hashing function allocations among the multiple PDCCH monitoring occasions, 2. The method of claim 1, wherein each hashing function is used to identify one or more control channel element (CCE) indices of a set of PDCCH candidates in the search space and depends on a value associated with a corresponding PDCCH monitoring occasion from among the plurality of PDCCH monitoring occasions.

3. the first CORESET is associated with a first frequency range; the second CORESET is associated with a second frequency range; The method of claim 1 or 2, wherein the first frequency range and the second frequency range are different from each other.

4. the first CORESET is associated with a first resource element group (REG) bundling; the second CORESET is associated with a second REG bundling; 4. The method of claim 1, wherein the first REG bundling and the second REG bundling are different from each other.

5. 5. The method of claim 1, wherein at least two PDCCH monitoring occasions of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations based at least in part on a PDCCH monitoring aggregation procedure.

6. The method of claim 1 , further comprising receiving an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions.

7. The hashing function is the location of the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions; or an index associated with the corresponding PDCCH monitoring occasion; 10. A method according to claim 2, or any one of claims 3 to 6 when dependent on claim 2, depending on at least one of the following:

8. 8. A method according to claim 2 or any one of claims 3 to 7 when dependent on claim 2, wherein the hashing function depends on the position of the corresponding PDCCH monitoring occasion within a slot.

9. 1. A method of wireless communication, comprising: transmitting, by a base station (BS), a monitoring configuration; the monitoring configuration includes repetition of downlink control information (DCI) over a plurality of physical downlink control channel (PDCCH) monitoring occasions of the same search space, the plurality of PDCCH monitoring occasions including a first PDCCH monitoring occasion and a second PDCCH monitoring occasion different from the first PDCCH monitoring occasion, the monitoring configuration identifying at least a first control resource set (CORESET) corresponding to the first PDCCH monitoring occasion and a second CORESET different from the first CORESET, the second CORESET corresponding to the second PDCCH monitoring occasion, the first CORESET being associated with a first transmission control indicator (TCI) state, and the second CORESET being associated with a second TCI state different from the first TCI state; transmitting, by the BS, the DCIs in the same search space associated with the multiple PDCCH monitoring occasions based on the monitoring configuration; Contains method.

10. The monitoring configuration: a frequency resource allocation difference between the plurality of PDCCH monitoring occasions; or Allocating different hashing functions among the multiple PDCCH monitoring occasions and further comprising a diversity parameter including at least one of:

10. The method of claim 9, wherein if the diversity parameter includes different hashing function allocations among the plurality of PDCCH monitoring occasions, each hashing function is used to identify one or more control channel element (CCE) indices of a set of PDCCH candidates in the search space, and is dependent on a value associated with a corresponding PDCCH monitoring occasion from among the plurality of PDCCH monitoring occasions.

11. The method of claim 9 or 10, further comprising transmitting an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions.

12. The hashing function is the location of the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions; or an index associated with the corresponding PDCCH monitoring occasion; The method of claim 10, which depends on at least one of the above, or claim 11 when dependent on claim 10.

13. 13. The method of claim 10, or claim 11 or 12 when dependent on claim 10, wherein the hashing function depends on the position of the corresponding PDCCH monitoring occasion within a slot.

14. A user equipment (UE), a transceiver configured to receive a monitoring configuration, a transceiver, wherein the monitoring configuration includes repetition of downlink control information (DCI) over a plurality of physical downlink control channel (PDCCH) monitoring occasions of the same search space, the plurality of PDCCH monitoring occasions including a first PDCCH monitoring occasion and a second PDCCH monitoring occasion different from the first PDCCH monitoring occasion, the monitoring configuration identifying at least a first control resource set (CORESET) corresponding to the first PDCCH monitoring occasion and a second CORESET different from the first CORESET, the second CORESET corresponding to the second PDCCH monitoring occasion, the first CORESET being associated with a first transmission control indicator (TCI) state, and the second CORESET being associated with a second TCI state different from the first TCI state; a processor configured to monitor for the DCI in the same search space associated with the plurality of PDCCH monitoring occasions based on the monitoring configuration; Equipped with UE.

15. A base station (BS), a transceiver, the transceiver comprising: transmitting a monitoring configuration; transmitting, the monitoring configuration including repetition of downlink control information (DCI) over a plurality of physical downlink control channel (PDCCH) monitoring occasions of the same search space, the plurality of PDCCH monitoring occasions including a first PDCCH monitoring occasion and a second PDCCH monitoring occasion different from the first PDCCH monitoring occasion, the monitoring configuration identifying at least a first control resource set (CORESET) corresponding to the first PDCCH monitoring occasion and a second CORESET different from the first CORESET, the second CORESET corresponding to the second PDCCH monitoring occasion, the first CORESET associated with a first transmission control indicator (TCI) state, and the second CORESET associated with a second TCI state different from the first TCI state; transmitting the DCI within the same search space associated with the multiple PDCCH monitoring occasions based on the monitoring configuration; and configured to: BS.

Images