Techniques for PDCCH Monitoring Aggregation

Abstract

A wireless communication system and method are provided that are associated with 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 repetitions of DCI on multiple PDCCH monitoring occasions in the search space. The monitoring configuration indicates one or more forms of diversity between PDCCH monitoring occasions. For example, diversity can be achieved by CORESET frequency allocation differences, PDCCH monitoring occasion frequency resource allocation differences, and / or different hash functions for CCE indexes for PDCCH monitoring occasions within a CORESET. Additional diversity is possible by using different beams and other methods. When explicitly or implicitly activated, the UE monitors PDCCH transmissions from a first device using the configured PDCCH monitoring aggregation.

Description

[0001] Cross - Reference to Related Applications

[0002] This application claims priority and the benefit of the following applications: U.S. Patent Application No. 17 / 357,387, filed on June 24, 2021; U.S. Provisional Patent Application No. 63 / 044,752, filed on June 26, 2020; U.S. Provisional Patent Application No. 63 / 044,866, filed on June 26, 2020; and U.S. Provisional Patent Application No. 63 / 045,572, filed on June 29, 2020. The disclosures of the above applications are hereby incorporated by reference in their entirety, as fully set forth below and for all applicable purposes. Technical Field

[0003] This application relates to wireless communication systems, and more particularly, to improved downlink control channel communication in wireless communication networks. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless multi - access communication system may include multiple base stations (BSs), each of which simultaneously supports communication for multiple communication devices (which may also be referred to as user equipment (UE)).

[0005] To meet the growing demand for extended mobile broadband connectivity, wireless communication technologies are evolving from Long - Term Evolution (LTE) technologies to next - generation New Radio (NR) technologies. For example, compared to LTE, NR is designed to provide lower latency, higher bandwidth or higher throughput, and higher reliability. NR is designed to operate over a wide variety of spectral bands, e.g., from low - frequency bands below approximately 1 gigahertz (GHz) and mid - frequency bands from approximately 1 GHz to approximately 6 GHz, to high - frequency bands such as millimeter - wave (mm - wave) bands. NR is also designed to operate across different spectral types, from licensed spectrum to unlicensed spectrum and shared spectrum. Spectrum sharing enables 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.

[0006] In a wireless communication network, a search space refers to a time-frequency region in a transmission time slot in which downlink (DL) control information is carried. The search space is typically located at the start of the transmission time slot. Under certain conditions, the DL control channel may be unreliable, which may affect the robustness of the network. Therefore, a method is needed to ensure that the DL control information is sent 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

[0007] The following presents a summary of some aspects of the present disclosure to provide a basic understanding of the discussed technology. This summary is not an extensive overview of all the expected features of the present disclosure, and is neither intended to identify the key or important elements of all aspects of the present disclosure, nor to 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 a summary form as a prelude to the more detailed description that is presented later.

[0008] For example, in one aspect of the present disclosure, a method for wireless communication includes: receiving, by a user equipment (UE), a monitoring configuration that specifies a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first CORESET and the second CORESET 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.

[0009] In an additional aspect of the present disclosure, a method for wireless communication includes: transmitting, by a base station (BS), a monitoring configuration that specifies a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among a plurality of monitoring occasions, the first CORESET and the second CORESET being different from each other. The method further includes: indicating, by the BS based on the monitoring configuration, to the UE to start monitoring a search space including the plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The method further includes: transmitting, by the BS, a PDCCH transmission to the UE in at least one of the first CORESET and the second CORESET.

[0010] In additional aspects of the present disclosure, a first wireless communication device includes a transceiver configured to: receive a monitoring configuration from 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 CORESET and the second CORESET being different from each other. The wireless communication device further includes a transceiver configured to: receive a monitoring configuration from 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 CORESET and the second CORESET being different from each other.

[0011] In additional aspects of the present disclosure, a first wireless communication device includes a transceiver configured to: send 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 CORESET and the second CORESET being different from each other. The transceiver is further configured to: indicate to the second wireless communication device, based on the monitoring configuration, to start monitoring a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The transceiver is further configured to: send PDCCH transmissions in at least one of the first CORESET and the second CORESET.

[0012] In additional aspects of the present disclosure, a non-transitory computer-readable medium having program code recorded thereon, the program code including code for causing a first wireless communication device to: receive a monitoring configuration from 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 CORESET and the second CORESET being different from each other. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to: monitor, based on the monitoring configuration, a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions.

[0013] In additional aspects of the present disclosure, a non-transitory computer-readable medium having program code recorded thereon, the program code including code for causing a first wireless communication device to: send 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 a plurality of monitoring occasions, the first CORESET and the second CORESET being different from each other. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to: based on the monitoring configuration, indicate to the second wireless communication device to start 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: send a PDCCH transmission in at least one of the first CORESET and the second CORESET.

[0014] In additional aspects of the present disclosure, a first wireless communication device includes units for: receiving a monitoring configuration from 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 a plurality of monitoring occasions, the first CORESET and the second CORESET being different from each other. The first wireless communication device further includes units for: based on the monitoring configuration, monitoring a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions.

[0015] In additional aspects of the present disclosure, a first wireless communication device includes units for: sending 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 a plurality of monitoring occasions, the first CORESET and the second CORESET being different from each other. The first wireless communication device further includes units for: based on the monitoring configuration, indicating to the second wireless communication device to start monitoring a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The first wireless communication device further includes units for: sending a PDCCH transmission to the second wireless communication device in at least one of the first CORESET and the second CORESET.

[0016] After reviewing the following description of specific, exemplary embodiments in conjunction with the accompanying drawings, other aspects, features, and embodiments will become apparent to those skilled in the art. Although features may be discussed below with respect to certain embodiments and drawings, all embodiments may include one or more of the advantageous features discussed herein. In other words, although one or more embodiments may be discussed as having certain advantageous features, one or more of such features may also be used in accordance with the various embodiments discussed herein. In a similar manner, although exemplary embodiments may be discussed below as device, system, or method embodiments, it should be understood that such exemplary embodiments may be implemented in a variety of devices, systems, and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A wireless communication network is shown in accordance with some embodiments of the present disclosure.

[0018] Figure 2 A transmission frame for a communication network is shown in accordance with some embodiments of the present disclosure.

[0019] Figure 3 A transmission frame for a communication network is shown in accordance with some embodiments of the present disclosure.

[0020] Figure 4 A block diagram of a user equipment (UE) is shown in accordance with some embodiments of the present disclosure.

[0021] Figure 5 A block diagram of an exemplary base station (BS) is shown in accordance with some embodiments of the present disclosure.

[0022] Figure 6 A signaling diagram of a scheme for multi-CORESET monitoring is shown in accordance with some embodiments of the present disclosure.

[0023] Figure 7 A signaling diagram of a scheme for multi-CORESET monitoring is shown in accordance with some embodiments of the present disclosure.

[0024] Figure 8 A signaling diagram of a scheme for multi-CORESET monitoring using multiple devices is shown in accordance with some embodiments of the present disclosure.

[0025] Figure 9 A flowchart of a wireless communication method is shown in accordance with some embodiments of the present disclosure.

[0026] Figure 10 A flowchart of a wireless communication method is shown in accordance with some embodiments of the present disclosure.

[0027] Figure 11Flowchart showing a wireless communication method according to some embodiments of the present disclosure.

[0028] Figure 12 Diagram showing an example resource structure for wireless communication according to some embodiments of the present disclosure.

[0029] Figure 13 Diagram showing an example associated with techniques for DL monitoring using diversity according to some embodiments of the present disclosure.

[0030] Figure 14 Diagram showing an example associated with techniques for DL monitoring using diversity according to some embodiments of the present disclosure.

[0031] Figure 15 Flowchart showing a wireless communication method according to some embodiments of the present disclosure.

[0032] Figure 16 Flowchart showing a wireless communication method according to some embodiments of the present disclosure.

[0033] Figure 17 Flowchart showing a wireless communication method according to some embodiments of the present disclosure.

[0034] Figure 18 Flowchart showing a wireless communication method according to some embodiments of the present disclosure. Detailed Description

[0035] The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. For the purpose of providing a thorough understanding of the various concepts, the detailed description includes specific details. It will be apparent, however, to one of ordinary skill in the art that the 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.

[0036] 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, for example: 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. As described herein, the terms "network" and "system" may be used interchangeably.

[0037] An OFDMA network can implement radio technologies such as evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, Flash Orthogonal Frequency Division Multiplexing (OFDM), etc. UTRA, E-UTRA, and GSM are part of the Universal Mobile Telecommunications System (UMTS). Specifically, LTE is the version of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents provided by an organization named "3rd Generation Partnership Project" (3GPP), and cdma2000 is described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). These various radio technologies and standards are known or are under development. For example, the 3rd Generation Partnership Project (3GPP) is a cooperation among groups of telecommunications associations 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 can define specifications for next-generation mobile networks, mobile systems, and mobile devices. The present disclosure relates to the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond, which have shared access to the radio spectrum among networks using some new and different radio access technologies or radio air interfaces.

[0038] In particular, 5G networks are expected to enable diverse deployments, diverse spectrums, and diverse services and devices implemented using a unified air interface based on OFDM. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are also considered. 5G NR will be able to scale to provide: (1) coverage for massive Internet of Things (IoT), which has ultra-high density (e.g., ~1M nodes / km 2 ), ultra-low complexity (e.g., ~10s of bits / second), ultra-low energy (e.g., ~10+ years of battery life), and deep coverage with the ability to reach challenging locations; (2) coverage for mission-critical control, which has strong security for protecting sensitive personal, financial, or confidential information, ultra-high reliability (e.g., ~99.9999% reliability), ultra-low latency (e.g., ~1 ms), and users with a wide range of mobility or lack of mobility; and (3) coverage for enhanced mobile broadband, which includes extremely high capacity (e.g., ~10 Tbps / km 2 ), extreme data rates (e.g., multi-Gbps rates, 100+ Mbps user experience rate), and improved discovery and optimized depth perception.

[0039] 5G NR can be implemented to use an optimized OFDM-based waveform, which has scalable numerology and transmission time intervals (TTIs); has a common, flexible framework to efficiently multiplex services and features using dynamic, low-latency time division duplex (TDD) / frequency division duplex (FDD) designs; and has improved radio technologies such as massive multiple input multiple output (MIMO), robust millimeter wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of the numerology in 5G NR and the scaling of the subcarrier spacing can efficiently address operating diverse services across diverse spectrums and diverse deployments. For example, in various outdoor and macro coverage deployments with implementations less than 3 GHz FDD / TDD, the subcarrier spacing can occur at 15 kHz for bandwidths (BW) such as 1, 5, 10, 20 MHz, etc. For various other outdoor and small cell coverage deployments with TDD greater than 3 GHz, the subcarrier spacing can occur at 30 kHz for 80 / 100 MHz BW. For various other indoor broadband implementations using TDD in the unlicensed portion of the 5 GHz band, the subcarrier spacing can occur at 60 kHz for 160 MHz BW. Finally, for various deployments transmitting using the mmWave component at 28 GHz TDD, the subcarrier spacing can occur at 120 kHz for 500 MHz BW.

[0040] The scalable numerology of 5G NR facilitates scalable TTIs for different latency and quality of service (QoS) requirements. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. The efficient multiplexing of long and short TTIs allows transmissions to start at symbol boundaries. 5G NR also anticipates a self-contained integrated subframe design, which has uplink / downlink scheduling information, data, and acknowledgments in the same subframe. The self-contained integrated subframe supports communication in unlicensed or contention-based shared spectrums, adaptive uplink / downlink (which can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current traffic demands).

[0041] Various other aspects and features of the present disclosure are further described below. It should be apparent that the teachings herein can be embodied in a variety of forms, and any specific structure, function, or both disclosed herein are merely representative and not restrictive. Based on the teachings herein, those skilled in the art should understand that the aspects disclosed herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, using any number of the aspects set forth herein, an apparatus can be implemented or a method can be practiced. In addition, such an apparatus can be implemented or such a method can be practiced using other structures, functions, or a combination of structures and functions other than or different from one or more of the aspects set forth herein. For example, a method can be implemented as part of a system, device, apparatus, and / or as instructions stored on a computer-readable medium for execution on a processor or computer. In addition, one aspect can include at least one element of a claim.

[0042] The communication can be in the form of a radio frame. The radio frame can be divided into a plurality of subframes, and the subframes can be divided into one or more time slots. Each time slot can be further divided into mini-slots. At the smallest level (e.g., within a time slot), a resource element (RE) includes a single subcarrier in the frequency domain and a single OFDM symbol in the time domain. A resource element group (REG) can be composed of multiple REs (e.g., 12) within a single OFDM symbol. A control channel element (CCE) includes a set of REGs.

[0043] In NR, the PDCCH is transmitted on a control resource set (CORESET). A CORESET is a set of CCEs used to carry PDCCH transmissions, e.g., 1, 2, 4, 8, or 16 CCEs. A CORESET is typically restricted to span less than the entire frequency range of a radio frame. Each CORESET has an associated CCE-to-REG mapping. The frequencies within a CORESET can be continuous or discontinuous. A CORESET can span one or more OFDM symbol time periods.

[0044] The set of potential PDCCH candidates is called a search space and is associated with a CORESET, and can have defined configurable monitoring occasions. The BS can configure the UE with one or more search spaces for PDCCH monitoring based on a predefined CORESET. The UE can perform blind decoding in the search space to search for DL control information from the BS. For example, the BS can configure the UE with a BWP, CORESET, and / or PDCCH search space via RRC configuration.

[0045] 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-to-REG mappings, different REG bundlings, and / or different Transmission Configuration Indicator (TCI) states (i.e., associated with different beams). Through mechanisms such as RRC configuration, multiple CORESETs can be pre-configured and associated with different monitoring occasions of the search space.

[0046] Multi-CORESET monitoring can be activated in a variety of ways. For example, multi-CORESET monitoring can be performed through semi-static configuration (such as RRC configuration) and / or dynamic configuration (such as MAC CE, UE-specific Downlink Control Information (DCI), or group-common DCI). Additionally, when a certain other criterion is met (e.g., activation of PDCCH monitoring aggregation), multi-CORESET monitoring can be implicitly activated. As used herein, PDCCH monitoring aggregation refers to repeating a single PDCCH over multiple CORESETs to create a larger virtual CORESET.

[0047] The applicability of multi-CORESET monitoring with or without monitoring aggregation may be conditional on certain parameters. For example, multi-CORESET monitoring may be conditional on the size of the CORESET (in terms of the number of RBs and / or OFDM symbols). As another example, it may be conditional on the available frequency range. As yet another example, multi-CORESET monitoring may be conditional on the subcarrier spacing. As another example, it may be conditional on the type of search space (e.g., UE-specific search space versus common search space). These are just a few examples. The multi-CORESET can be conditional on any one or more of such examples (e.g., a subset or all of them).

[0048] Aspects of the present disclosure can provide several benefits. For example, configuring a UE to monitor the PDCCH when the CORESETs cover different frequency ranges can provide frequency diversity. Such frequency diversity can help make the communication more robust because any frequency-dependent weaknesses in the channel can be mitigated. Similarly, differences in the CCE-to-REG mapping or REG bundling can provide diversity for the signal. By changing the TCI state (and thus the associated beam) between CORESETs, beam diversity can alternatively and / or also be introduced. Beam diversity can increase the robustness of sending the PDCCH to the UE. Further improvements can be achieved when PDCCH monitoring aggregation is used in conjunction with multi-CORESET monitoring. By aggregating the repetition of the same PDCCH over CORESETs with different parameters, the PDCCH transmission has stronger robustness and more power.

[0049] Figure 1 FIG. 1 shows a wireless communication network 100 in accordance with some aspects of the present disclosure. The network 100 may be a 5G network. The network 100 includes a plurality of base stations (BSs) 105 (labeled 105a, 105b, 105c, 105d, 105e, and 105f, respectively) and other network entities. The BS 105 may be a station that communicates with the UE 115 and may also be referred to as an evolved Node B (eNB), a next-generation eNB (gNB), an access point, etc. Each BS 105 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to this specific 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.

[0050] The BS 105 may provide communication coverage for macro cells or small cells (such as pico cells or femto cells) and / or other types of cells. Macro cells typically cover a relatively large geographic area (e.g., with a radius of several kilometers) and may allow unrestricted access by UEs having a service subscription with the network provider. Small cells (such as pico cells) typically cover a relatively small geographic area and may allow unrestricted access by UEs having a service subscription with the network provider. Small cells (such as femto cells) typically also cover a relatively small geographic area (e.g., a residence) and may provide restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in a residence, etc.) in addition to unrestricted access. The BS for a macro cell may be referred to as a macro BS. The BS for a small cell may be referred to as a small cell BS, a pico BS, a femto BS, or a home BS. In Figure 1 the example shown in FIG. 1, BSs 105d and 105e may be conventional macro BSs, while BSs 105a - 105c may be macro BSs implemented using one of three-dimensional (3D) MIMO, full-dimensional (FD) MIMO, or massive MIMO. BSs 105a - 105c may utilize their higher-dimensional MIMO capabilities to utilize 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. The BS105 may support one or more (e.g., two, three, four, etc.) cells.

[0051] Network 100 may support synchronous operations or asynchronous operations. For synchronous operations, the BSs may have similar frame timings, and transmissions from different BSs may be approximately aligned in time. For asynchronous operations, the BSs may have different frame timings, and transmissions from different BSs may not be aligned in time.

[0052] UEs 115 are scattered throughout the wireless network 100, and each UE 115 may be stationary or mobile. UE 115 may also be referred to as a terminal, mobile station, subscriber unit, station, etc. UE 115 may be a cellular phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop computer, cordless phone, wireless local loop (WLL) station, etc. In one aspect, UE 115 may be a device including a universal integrated circuit card (UICC). In another aspect, UE 115 may be a device that does not include a UICC. In some aspects, a UE that does not include a UICC may also be referred to as an IoT device or an Internet of Everything (IoE) device. UEs 115a - 115d are examples of mobile smart phone - type devices accessing the network 100. UE 115 may also be a machine specifically configured for connected communication, including machine - type communication (MTC), enhanced MTC (eMTC), narrow - band IoT (NB - IoT), etc. UEs 115e - 115k are examples of various machines accessing the network 100 that are configured for communication. UE 115 may be capable of communicating with any type of BS, whether it is a macro BS, small cell, etc. In Figure 1 which, lightning (e.g., a communication link) indicates a wireless transmission between UE 115 and a serving BS 105 (which is the BS designated to serve UE 115 on the downlink and / or uplink), or a desired transmission between BSs and a backhaul transmission between BSs.

[0053] In operation, BSs 105a - 105c may use 3D beamforming and collaborative spatial techniques, such as coordinated multipoint (CoMP) or multi - connection, to serve UEs 115a and 115b. Macro BS 105d may perform backhaul communication with BSs 105a - 105c and small cell (BS 105f). Macro BS 105d may also send multicast services subscribed to and received by UEs 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or Gray alerts.

[0054] BS 105 can also communicate with the core network. The core network can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. At least some of the BSs 105 in BS 105 (e.g., which can be an example of a gNB or an access node controller (ANC)) can interface with the core network via a backhaul link (e.g., NG-C, NG-U, etc.) and can perform radio configuration and scheduling for communication with the UE 115. In various examples, the BSs 105 can communicate with each other directly or indirectly (e.g., via the core network) via a backhaul link (e.g., X1, X2, etc.), which can be a wired or wireless communication link.

[0055] Network 100 can also support mission-critical communications with ultra-reliable and redundant links for mission-critical devices (e.g., UE 115e, which can be a drone). The redundant communication links with UE 115e can include links from macro BSs 105d and 105e and links 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)) can communicate directly with the BSs (such as small cell BS 105f and macro BS 105e) via network 100, or communicate in a multi-hop configuration by communicating with another user device that relays their information to the network (e.g., UE 115f transmits temperature measurement information to a smart meter (UE 115g), and the temperature measurement information is then reported to the network via small cell BS 105f). Network 100 can also provide additional network efficiency via dynamic, low-latency TDD / FDD communications (e.g., in vehicle-to-vehicle (V2V) communications).

[0056] In some implementations, network 100 uses an OFDM-based waveform for communication. An OFDM-based system can divide the system BW into multiple (K) orthogonal subcarriers, which are generally also referred to as subcarriers, tones, bins, etc. Each subcarrier can be modulated with data. In some instances, the subcarrier spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system BW. The system BW can also be divided into subbands. In other instances, the subcarrier spacing and / or the duration of the TTI can be scalable.

[0057] In some aspects, BS 105 may assign or schedule transmission resources (e.g., in the form of time-frequency resource blocks (RBs)) for downlink (DL) and uplink (UL) transmissions in network 100. DL refers to the transmission direction from BS 105 to UE 115, and UL refers to the transmission direction from UE 115 to BS 105. As noted above, the communication may be in the form of radio frames. The radio frames may be divided into multiple subframes or time slots, e.g., approximately 10. Each time slot may be further divided into mini-slots. 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 at different time periods using the same frequency band. For example, a subset of subframes (e.g., DL subframes) in the radio frame may be used for DL transmissions, and another subset of subframes (e.g., UL subframes) in the radio frame may be used for UL transmissions.

[0058] DL subframes and UL subframes may be further divided into several regions. For example, each DL or UL subframe may have predefined regions for the transmission of reference signals, control information, and data. The reference signal is a predefined signal that facilitates communication between BS 105 and UE 115. For example, the reference signal may have a specific pilot pattern or structure, where the pilot tones may span the operating BW or frequency band, and each pilot tone is located at a predefined time and a predefined frequency. For example, BS105 may transmit a cell-specific reference signal (CRS) and / or a channel state information-reference signal (CSI-RS) so that UE 115 can estimate the DL channel. Similarly, UE 115 may transmit a sounding reference signal (SRS) so that BS 105 can estimate the UL channel. The control information may include resource assignment and protocol control. The data may include protocol data and / or operation data. Control information such as PDCCH has been discussed above, and the control information will be further described below with respect to embodiments of the present disclosure. In some embodiments, BS 105 and UE 115 may use self-contained subframes for communication. The self-contained subframe may include a portion for DL communication and a portion for UL communication. The self-contained subframe may be DL-centric or UL-centric. A DL-centric subframe may include a longer duration for DL communication (compared to that for UL communication). A UL-centric subframe may include a longer duration for UL communication (compared to that for UL communication).

[0059] In some aspects, network 100 can be an NR network deployed on licensed spectrum. BS 105 can send synchronization signals (e.g., including a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS)) in network 100 to facilitate synchronization. BS 105 can broadcast system information associated with network 100 (e.g., including a Master Information Block (MIB), a Remaining Minimum System Information (RMSI), and Other System Information (OSI)) to facilitate initial network access. In some instances, BS 105 can broadcast the PSS, SSS, and / or MIB in the form of a Synchronization Signal Block (SSB) on a Physical Broadcast Channel (PBCH), and can broadcast the RMSI and / or OSI on a Physical Downlink Shared Channel (PDSCH).

[0060] In some aspects, a UE 115 attempting to access network 100 can perform initial cell search by detecting the PSS from BS 105. The PSS can achieve slot timing synchronization and can indicate a physical layer identity value. Subsequently, UE 115 can receive the SSS. The SSS can achieve radio frame synchronization and can provide a cell identity value, which can be combined with the physical layer identity value to identify the cell. The PSS and SSS can be located in the central part of the carrier or at any appropriate frequency within the carrier.

[0061] After receiving the PSS and SSS, UE 115 can receive the MIB. The MIB can include system information for initial network access and scheduling information for the RMSI and / or OSI. After decoding the MIB, UE 115 can receive the RMSI and / or OSI. The RMSI and / or OSI can include Radio Resource Control (RRC) information related to the Random Access Channel (RACH) procedure, paging, a Control Resource Set (CORESET) for Physical Downlink Control Channel (PDCCH) monitoring, Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), power control, and SRS.

[0062] After obtaining the MIB, RMSI, and / or OSI, UE 115 can perform a random access procedure to establish a connection with BS 105. For the random access procedure, UE 115 can send a random access preamble, and BS 105 can respond with a random access response. Upon receiving the random access response, UE 115 can send a connection request to BS 105, and BS 105 can respond with a connection response.

[0063] After establishing a connection, UE 115 and BS 105 can enter the normal operation phase, during which operation data can be exchanged. For example, BS 105 can schedule UE 115 for UL and / or DL communication. BS 105 can send UL and / or DL scheduling grants to UE 115 via PDCCH. BS 105 can send DL communication signals to UE 115 via PDSCH according to the DL scheduling grant. UE 115 can send UL communication signals to BS 105 via PUSCH and / or PUCCH according to the UL scheduling grant.

[0064] In some aspects, network 100 can operate on the system BW or a component carrier (CC) BW. Network 100 can divide the system BW into multiple bandwidth parts (BWPs) (e.g., portions). BS 105 can dynamically assign UE 115 to operate on a specific BWP (e.g., a specific portion of the system BW). The assigned BWP can be referred to as the active BWP. UE 115 can monitor the active BWP for signaling information from BS 105. BS 105 can schedule UE 115 for UL or DL communication in the active BWP. In some embodiments, BS 105 can assign a pair of BWPs within a CC to UE 115 for UL and DL communication. For example, the BWP pair can include one BWP for UL communication and one BWP for DL communication. BS 105 can additionally configure UE 115 with one or more CORESETs in the BWP. A CORESET can include a set of frequency resources spanning multiple symbols in time. BS 105 can configure UE 115 with one or more search spaces for PDCCH monitoring based on the CORESET. UE 115 can perform blind decoding in the search space to search for DL control information from the BS. In one example, BS 105 can configure UE 115 with BWP, CORESET, and / or PDCCH search space via RRC configuration. The mechanism for configuring the search space is described in more detail herein.

[0065] In some aspects, network 100 may operate on a shared channel, which may include a shared frequency band or an unlicensed frequency band. For example, network 100 may be an NR-U network. In such an embodiment, BS 105 and UE 115 may be operated by multiple network operating entities. To avoid collisions, BS 105 and UE 115 may employ a listen-before-talk (LBT) procedure to monitor for transmission opportunities (TXOPs) in the shared channel. For example, BS 105 may perform CAT4 LBT to acquire or reserve a TXOP or channel occupancy time (COT) in the shared channel. CAT4 LBT refers to LBT with random backoff and a variable contention window. When passing LBT, BS 105 may schedule one or more UEs 115 to perform DL communication and / or UL communication within the acquired COT.

[0066] According to embodiments of the present disclosure, BS 105 may configure UE 115 with a CORESET having a PDCCH search space for PDCCH monitoring. Different CORESETs may cover different frequency ranges, have different CCE-to-REG mappings or REG bundling, different TCI states (and thus different beams), or some combination of these variations. The mechanism for configuring (and using) different CORESETs is described in more detail herein.

[0067] Figure 2 is a timing diagram showing a transmission frame structure 200 according to some embodiments of the present disclosure. The transmission frame structure 200 may be used by a BS (such as BS 105) and a UE (such as UE 115) in a network (such as network 100) for communication. In particular, the BS may communicate with the UE using time-frequency resources configured as shown in the transmission frame structure 200. In Figure 2 which, the x-axis represents time in some arbitrary units, and the y-axis represents frequency in some arbitrary units. The transmission frame structure 200 includes a radio frame 202. The duration of the radio frame 202 may vary according to embodiments. In one example, the radio frame 202 may have a duration of approximately ten 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.

[0068] Each subframe 204 may include N time slots 206, where N is any suitable positive number including 1. Each time slot 206 includes a plurality of subcarriers 218 in frequency and a plurality of symbols 216 in time. The number of subcarriers 218 and / or the number of symbols 216 in the time slot 206 may vary according to embodiments, 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 form one resource element (RE) 220 for transmission.

[0069] The BS (e.g., Figure 1 BS 105 in Figure 1 ) may schedule the UE (e.g., Figure 2 UE115 in

[0070] ) for UL and / or DL communication at the time granularity of the time slot 206. The BS 105 may schedule the UE 115 to monitor PDCCH transmissions by instantiating a search space associated with the CORESET 212. The search space may also be instantiated using the associated CORESET 214. Thus, as shown in the example of Figure 2 , there are two CORESETs within the time slot 206, and thus there are two monitoring opportunities, which are part of the search space for the UE 115 to detect control information from the BS105.

[0071] BS 105 can configure the UE 115 with one or more search spaces by associating the CORESET 212 with a starting position (e.g., starting time slot 206), the position of symbol 216 within the time slot 206, a period or time pattern, and a candidate mapping rule. For example, the search space can include a candidate set of CCEs mapped to an aggregation level of 1, 2, 4, 8, and / or 12 CCEs. As an example, the search space can include the CORESET212 starting at the first symbol 216 indexed within the starting time slot 206. The search space can also include the CORESET 214 starting at a later symbol index within the starting time slot 206. An exemplary search space can have a period of approximately five time slots and can have candidates with an aggregation level of 1, 2, 4, and / or 8.

[0072] The UE 115 can perform blind decoding in the search space to search for DL control information (e.g., time slot format information and / or scheduling information) from the BS. In some examples, the UE can search a subset of the search space based on certain rules, for example, associated with the UE's channel estimation and / or blind decoding capabilities. One such example of the DL control information that the UE 115 can perform blind decoding on is the PDCCH from the BS 105.

[0073] As Figure 2 shown, the CORESET 212 and the CORESET 214 can be at different frequencies from each other. As shown, the CORESETs can be non - contiguous, or they can be contiguous. The frequency ranges of the CORESET 212 and the CORESET 214 can overlap or not overlap (e.g., as Figure 2 shown, the frequency ranges partially overlap and are thus different from each other). In some aspects, the frequency offset between the CORESETs is a multiple of six RBs or some other offset. According to Figure 2 the example, each of the CORESET 212 and the CORESET 214 can carry a different PDCCH transmission (or none at all, although being part of the UE115's search space). The CORESET 212 and the CORESET 214 can have other characteristics that are different from each other in addition to (or instead of) frequency. For example, they can be different in terms of CCE - to - REG mapping and / or REG bundling. Or, they can also be associated with different TCI states and thus different beams. Additionally, as discussed in more detail with respect to Figure 12 the CCE index of the PDCCH monitoring occasion can be different across the CORESETs. Other forms of diversity between the CORESETs can also be implemented, including some combination of different characteristics (e.g., all of the above differences together or a subset thereof).

[0074] By increasing the diversity between CORESETs, problems with the transmission channels associated with these features can be mitigated. Figure 2 Two different CORESETs are shown, but there can be more than two CORESETs, each with the same or different characteristics in any combination.

[0075] Figure 3 Shown similar to Figure 2 is a transmission frame structure 300 similar to the transmission frame structure 200 in. Radio frame 302, subframe 304, and time slot 306 are respectively similar to radio frame 202, subframe 204, and time slot 206. RE 320 consists of a single OFDM symbol 316 and a single subcarrier 318. CORESET 312 and CORESET 214 are also respectively similar to Figure 2 the CORESET 212 and CORESET214 of. Therefore, the discussion will focus on Figure 3 the additional aspects shown in.

[0076] In Figure 3 CORESET 312 and CORESET 314 are part of an aggregated monitoring occasion 322. This means that CORESET312 and CORESET 314 carry the same PDCCH (i.e., multiple repetitions of the PDCCH over an aggregated set of multiple monitoring occasions associated with different CORESETs 312 and 314). By transmitting the same PDCCH over an aggregated set of multiple monitoring occasions, the aggregation of the monitoring occasions mitigates potential problems with beam diversity. For example, the related US Provisional Application with Attorney Docket No. 204172P1 generally discusses more details related to the aggregation of monitoring occasions and is hereby incorporated by reference in its entirety as if fully set forth herein.

[0077] According to embodiments of the present disclosure, additional diversity is achieved by making CORESETs 312 and 314 different from each other in some way, such as frequency, CCE-to-REG mapping, REG bundling, TCI state, or some combination of these or other CORESET characteristics. The CORESETs can be contiguous or non-contiguous. Additionally, there can be more than two aggregated CORESETs, each with the same or different characteristics from each other in any combination. By adding diversity to the characteristics of the CORESETs, a more robust network can be achieved. The CORESETs can be contiguous or non-contiguous. Additionally, there can be more than two aggregated CORESETs, each with the same or different characteristics from each other in any combination. Additional details will be discussed below.

[0078] In some aspects, the UE 115 receives a monitoring configuration (or frequency diversity configuration), which includes an indication of the frequency allocation for a CORESET (such as CORESET 314) associated with a search space. 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).

[0079] 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 indication of the frequency offset may indicate the frequency offset as a function of the initial symbol of the second CORESET 314 (e.g., a function of the position of the second CORESET 314 within the time slot 306).

[0080] In some aspects, the monitoring configuration may indicate a specified number of PDCCH monitoring opportunities (or CORESETs) per time slot, and the frequency offset may be associated with the specified monitoring opportunity per time slot. For example, the frequency offset may be associated with the second CORESET 314 in each time slot. In some aspects, as shown, the frequency diversity configuration may indicate a specified number of CORESETs 312 and 314 for each aggregated monitoring opportunity 322. The frequency offset may be associated with the specified CORESET 314 for each aggregated monitoring opportunity 322. For example, the frequency offset may be associated with the second CORESET 314 of the aggregated monitoring opportunity 322.

[0081] In some aspects, the frequency offset may be associated with a subset of a plurality of CORESETs that includes the second CORESET and at least a third CORESET. For example, in some aspects, the frequency offset may be associated with the second and third CORESETs among the plurality of CORESETs.

[0082] Figure 4 is a block diagram of an exemplary UE 400 according to an embodiment of the present disclosure. The UE 400 may be the UE 115 in the network 100 discussed above in Figure 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 communicate with each other directly or indirectly via one or more buses, for example.

[0083] 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, 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.

[0084] 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 non-transitory computer-readable media. The memory 404 may store or have stored thereon instructions 406. The instructions 406 may include instructions that, when executed by the processor 402, cause the processor 402 to perform the operations described herein in connection with embodiments of the present disclosure (e.g., Figure 2-3 and aspects of FIGS. 6-17) as described with reference to the UE 115. The instructions 406 may also be referred to as program code. The program code may be used to cause a wireless communication device to perform these operations, e.g., by causing one or more processors (such as the processor 402) to control or command the wireless communication device to do so. The terms “instructions” and “code” should be construed 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 multiple computer-readable statements.

[0085] 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 a general purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 412.

[0086] The PDCCH monitoring module 408 may be used in various aspects of the present disclosure, e.g., Figure 2-3and aspects of 6 - 18. The PDCCH monitoring module 408 is configured to receive monitoring configuration from a BS (e.g., Figure 1 the BS 105 in ). The monitoring configuration may indicate multiple CORESETs associated with the same or multiple search spaces. The PDCCH monitoring module 408 is also configured to perform single - CORESET PDCCH monitoring, multi - CORESET PDCCH monitoring, or multi - CORESET aggregation monitoring according to 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 activating PDCCH monitoring occasion aggregation. 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., transmitted via a semi - static RRC configuration message or a more dynamic MAC CE or DCI message).

[0087] 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. Additionally, the CCE - to - REG mapping between CORESETs may be different. The monitoring configuration received by the PDCCH monitoring module 408 may also or alternatively indicate multiple hash functions for identifying a set of PDCCH candidates for a search space, and wherein the hash function among the multiple hash functions depends on at least one of the following: the position of the corresponding PDCCH monitoring occasion among multiple PDCCH monitoring occasions, the index associated with the corresponding PDCCH monitoring occasion, or a combination thereof. These may be alternative options or used together in some combination, such as according to some examples described below with respect to additional figures.

[0088] 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 at least in part based on determining that the parameter meets a specified threshold. In some aspects, the parameter may indicate the size of the CORESET associated with a search space, the size of the bandwidth associated with a search space, the frequency range associated with a search space, the sub - carrier spacing associated with a search space, the type of search space associated with a search space, etc., as described below in connection with Figure 13 , 14 , 15 and 17.

[0089] 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 104). 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 conversion or digital-to-analog conversion, etc.) the modulated / encoded data from the modem subsystem 412 (for an outbound transmission) or the modulated / encoded data of a transmission originating from another source (such as the UE 115 or the BS 104). The RF unit 414 may also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as being integrated together in the transceiver 410, the modem subsystem 412 and the RF unit 414 may be separate devices that are coupled together at the UE 115 to enable the UE 115 to communicate with other devices. The transceiver 410 may also be configured to monitor DCI in a search space associated with a plurality of PDCCH monitoring opportunities based at least in part on a monitoring configuration and / or a hash function.

[0090] The RF unit 414 may provide the modulated and / or processed data (e.g., a data packet (or more generally, a data message containing one or more data packets and other information)) to the antenna 416 for transmission to one or more other devices. The antenna 416 may also receive data messages sent from other devices. The antenna 416 may provide the received data message for processing and / or demodulation at the transceiver 410. The antenna 416 may include a plurality of antennas with similar or different designs to maintain multiple transmission links. The RF unit 414 may configure the antenna 416.

[0091] 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 the components may implement each RAT.

[0092] Figure 5 is a block diagram of an exemplary BS 500 according to an embodiment of the present disclosure. The BS 500 may be as described above in Figure 1The BS 105 in network 100 discussed in. 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 communicate with each other directly or indirectly via, for example, one or more buses.

[0093] The processor 502 may have various characteristics, such as a specific type of processor. For example, these 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, for example, a combination of a DSP and a microprocessor, multiple microprocessors, the combination of one or more microprocessors and a DSP core, or any other such configuration.

[0094] The memory 504 may include cache memory (e.g., the cache memory of the processor 502), RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, solid-state memory devices, one or more hard disk drives, a memristor-based array, other forms of volatile and non-volatile memory, or a combination of different types of memory. In some embodiments, the memory 504 includes non-transitory computer-readable media. 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., Figure 2-3 Aspects of and 6-18). The instructions 506 may also be referred to as code, and the code may be broadly interpreted to include any type of computer-readable statement, as discussed above with respect to Figure 4 discussed.

[0095] 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 the 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 a general-purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 512.

[0096] The DL control channel module 508 may be used for various aspects of the present disclosure, for example, Figure 2-3 Aspects of and 6-18. The DL control channel module 508 is configured to communicate with a UE (e.g., Figure 1The UE 115) in it transmits a monitoring configuration. The monitoring configuration may indicate multiple CORESETs for the UE 115 to monitor, for example, within a search space having multiple monitoring occasions. The monitoring configuration may indicate the differences between the configured CORESETs, which are diversities in terms of frequency or beam or other aspects. For example, the CORESETs may be configured with a frequency offset between them or different CCE-to-REG mappings.

[0097] The monitoring configuration may include the repetition of downlink information (DCI) on multiple physical downlink control channel (PDCCH) monitoring occasions of the search space, where at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations.

[0098] The monitoring configuration may also indicate multiple hash functions for identifying one or more control channel element (CCE) indices of a PDCCH candidate set of the search space, where the hash function among the multiple hash functions depends on at least one of the following: the position of the corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, the index associated with the corresponding PDCCCH monitoring occasion, or a combination thereof, for a unit that monitors DCI in the search space associated with the multiple PDCCH monitoring occasions at least partially based on the hash function. The DL control channel module 508 is also configured to explicitly or implicitly activate multi-CORESET monitoring on the UE by activating some other aspect such as monitoring occasion aggregation (or, in other embodiments, not monitoring aggregation but through explicit message transmission via RRC configuration, MAC CE, and / or DCI messaging).

[0099] In some aspects, the base station DL control channel module 508 may include a unit for transmitting a monitoring configuration to the UE, where the monitoring configuration includes the repetition of DCI on multiple PDCCH monitoring occasions of the search space, where the monitoring configuration indicates multiple hash functions for identifying one or more CCE indices of a PDCCH candidate set of the search space, where the hash function among the multiple hash functions depends on at least one of the following: the position of the corresponding PDCCH monitoring occasion among the multiple PDCCH monitoring occasions, the index associated with the corresponding PDCCCH monitoring occasion, or a combination thereof, for a unit that monitors DCI in the search space associated with the multiple PDCCH monitoring occasions at least partially based on the hash function.

[0100] 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 meets a condition. The DL control channel module 508 may determine that a parameter meets a condition based at least in part on determining that the parameter meets a specified threshold. In some aspects, the parameter may indicate the size of the CORESET associated with the search space, the size of the bandwidth associated with the search space, the frequency range associated with the search space, the subcarrier spacing associated with the search space, the type of search space associated with the search space, etc., as described above in connection with Figure 13 , 14 , 15, and 17.

[0101] The DL control channel module 508 may use one or more inputs or states 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 versus common search space). The DL control channel module 508 may configure the UE 115 to monitor CORESETs with different frequencies, different CCE-to-REG mappings, different REG bundlings, and / or different TCI states or any other characteristics of the CORESET through which diversity can be achieved. The DL control channel module 508 may also perform one or more techniques associated with hash 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 directly or indirectly. For example, the DL control channel module 508 may pre-configure the UE 115 to monitor subject to one or more of the above conditions.

[0102] 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 UE 115 and / or another core network element). The transceiver 510 may send DCI on multiple PDCCH monitoring occasions based at least in part on frequency diversity 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 from the modem subsystem 512 (for an outbound transmission) or the modulated / encoded data of a transmission originating from another source (such as UE 115 or 400). The RF unit 514 may also be configured to perform analog beamforming in combination with digital beamforming. Although shown as being integrated together in the transceiver 510, the modem subsystem 512 and the RF unit 514 may be separate devices that are coupled together at the BS 105 to enable the BS 105 to communicate with other devices.

[0103] The RF unit 514 may provide the modulated and / or processed data (e.g., a data packet (or more generally, a data message containing one or more data packets and other information)) to the antenna 516 for transmission to one or more other devices. According to embodiments of the present disclosure, this may include, for example, transmitting information to complete an attachment to the network and communicating with a resident UE 115 or 500. The antenna 516 may also receive a data message sent from another device and provide the received data message for processing and / or demodulation at the transceiver 510. The antenna 516 may include multiple antennas with similar or different designs in order to maintain multiple transmission links.

[0104] In one embodiment, the BS 500 may include multiple transceivers 510 implementing different RATs (e.g., NR and LTE). In one embodiment, the BS 500 may include a single transceiver 510 implementing multiple RATs (e.g., NR and LTE). In one embodiment, the transceiver 510 may include various components, and different combinations of the components may implement each RAT.

[0105] Figure 6 is a signaling diagram illustrating a communication method 600 with 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 Figure 6In the illustration, the first device 602 may be an example of the UE 400, and the second device 604 may be an example of the BS 500.

[0106] Method 600 may employ mechanisms similar to those described above with respect to Figure 2 and 3 structures 200 and / or 300 and / or herein with respect to Figure 9 and 10 methods 900 and 1000 described. The steps of method 600 may be performed by the computing devices of the BS 500 and the UE (e.g., processors, processing circuitry, and / or other suitable components). In one example, the 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. The 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 a plurality of enumerated steps, but 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.

[0107] 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 a plurality of CORESETs and thus for defining a search space as described herein.

[0108] After receiving the monitoring configuration, the first device 602 (e.g., UE 400) may not start monitoring a plurality of different CORESETs (such as different in terms of 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 it should monitor a plurality of different CORESETs. 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.

[0109] At action 614, the UE monitors its configured search space for the PDCCH according to the configuration and activation, which includes a plurality of different CORESETs (i.e., CORESETs having one or more characteristics different from each other). The unit for performing the function of action 614 may or may not include, for example, with reference to Figure 4the PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404 of the UE 400.

[0110] Figure 7 is a signaling diagram showing a communication method 700 with multiple different CORESETs according to some embodiments of the present disclosure. Contrary to method 600 where multi-CORESET monitoring is explicitly activated, in Figure 7 multi-CORESET monitoring is implicitly activated. For example, in one embodiment, the implicit activation is achieved via monitoring the aggregated PDCCH signal. In Figure 7 the illustration, the first device 702 may be an example of the UE 400, and the second device 704 may be an example of the BS 500.

[0111] 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 structures and / or mechanisms similar to those described above with respect to Figure 3 structure 300 and / or those described herein with respect to Figure 9 respectively, 10 and methods 900, 1000, and 1100 described in 11. The steps of method 700 may be performed by computing devices (e.g., processors, processing circuitry, and / or other suitable components) of the BS 500 and the UE 400. In one example, the 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. The 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 700. As shown, method 700 includes a number of enumerated steps, but embodiments of 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.

[0112] 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 thus for defining the search space as described herein. For example, this may be done semi-statically via an RRC configuration message transmission.

[0113] After receiving the monitoring configuration, the first device 702 (e.g., UE 400) may not start monitoring multiple different CORESETs (e.g., different in terms of frequency, CCE mapping, REG bundling, and / or different TCI states, etc.) until it receives the 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, the aggregated monitoring occasion is associated with the same PDCCH transmission on different CORESETs, and the different CORESETs have some diversity in one or more characteristics (e.g., different in terms of frequency, CCE mapping, REG bundling, and / or different TCI states, etc.). The activation signal (PDCCH monitoring aggregation signal) can be semi-static via RRC configuration and / or dynamic via MAC CE or UE-specific DCI or group common DCI.

[0114] At action 714, the first device 702 monitors its configured search space according to the configuration and activation (as previously described, using aggregation for greater power), which includes multiple different CORESETs for the same PDCCH (i.e., CORESETs having one or more characteristics different from each other). The unit for performing the function of step 714 may but does not necessarily include, for example, the PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404 of the UE 400 with reference to Figure 4 the UE 400.

[0115] Figure 8 is a signaling diagram showing a communication method 800 with multiple different CORESETs according to some embodiments of the present disclosure. The method 800 can be implemented between a BS (e.g., BS 105 or BS 500) and a UE (e.g., UE 115 or UE 400). In Figure 8 the illustration, both the first device 802 and the second device 804 can be examples of the UE 400, and the third device 806 can be an example of the BS 500.

[0116] The method 800 can adopt structures 200 and / or 300 as described above respectively with respect to Figure 2 and 3 and / or the structures described herein respectively with respect to Figure 9 , 10Similar mechanisms in methods 900, 1000, and 1100 described in FIGS. 9 and 11. The steps of method 800 may be performed by computing devices (e.g., processors, processing circuitry, 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 800. As shown, method 800 includes a plurality of enumerated steps, but 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.

[0117] At action 810, a third device 806 (e.g., BS 500) sends a monitoring configuration to a first device 802 and a second device 804. The monitoring configuration may be sent to each device individually via a separate transmission, or sent to each device via a mechanism that transmits to both devices simultaneously. For example, the transmission may be an RRC configuration message or a system information (SI) broadcast, etc. The monitoring configuration may include configuration information for defining a plurality of different CORESETs (e.g., different in terms of frequency, CCE mapping, REG bundling, and / or different TCI states, etc.) and thus for defining a search space as described herein. After receiving the monitoring configuration, one or both of the first device 802 and the second device 804 may delay monitoring a plurality of different CORESETs until an activation signal is received at action 812. Thus, the first device 802 may wait to monitor a plurality of CORESETs until it receives the activation signal, regardless of whether the second device 804 also receives the activation signal. The second device 804 is similar to the first device 802.

[0118] The activation signal may be, for example, an explicit signal that indicates to the device that it should monitor a plurality of different CORESETs (multi-CORESET monitoring). This is similar to the method discussed above with respect to Figure 6 The activation signal may be semi-static via an RRC configuration and / or dynamic via a MAC CE or UE-specific DCI or group-common DCI. For example, each of the first device 802 and the second device 804 may receive a UE-specific DCI for each device, while in other examples, both devices may receive a group-common DCI (e.g., in the case where both are in the same group).

[0119] At operation 814, the first device 802 and the second device 804 monitor the PDCCH according to the configuration and activation. The unit for performing the function of step 814 when executed by the UE 400 may or may not include, for example, the PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404 with reference to Figure 4 as described.

[0120] Figure 9 is a flowchart 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 circuitry, and / or other suitable components) of a wireless communication device or other suitable units for performing these steps. For example, a wireless communication device (such as UE 115 or 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 900. Method 900 may employ mechanisms similar to those described above with respect to Figure 2 and 3 and the methods 600, 700, and 800 described respectively with respect to Figure 6 , 7 and 8. As shown, method 900 includes a plurality of recited steps, but embodiments of method 900 may include additional steps before, after, and between the recited steps. In some embodiments, one or more of the recited steps may be omitted or performed in a different order.

[0121] At 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 compared to the second CORESET, although within the same search space. Additionally, the first CORESET differs from the second CORESET in terms of frequency, CCE mapping, REG bundling, and / or TCI state. In some instances, the unit for performing the function of operation 910 may or may not include, for example, the PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404 with reference to Figure 4 as described.

[0122] At operation 920, UE 400 monitors a search space including multiple monitoring occasions for physical downlink control channel (PDCCH) transmissions based on a monitoring configuration. In some examples, this can include non-aggregated monitoring occasions for an instance of the PDCCH in one CORESET among different CORESETs (e.g., different in terms of frequency, CCE mapping, REG bundling, TCI state, etc.). In other examples, this can include monitoring the monitoring occasions as a set of aggregated occasions, i.e., each monitoring occasion includes the same PDCCH to increase coverage. According to embodiments of the present disclosure, by adding different CORESETs, additional reliability and robustness are introduced. In some instances, the unit for performing the functions of step 920 may but does not necessarily include, for example, the PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404 with reference to Figure 4 is a flowchart 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 circuitry, and / or other suitable components) of a wireless communication device or other suitable units for performing these steps. For example, a wireless communication device (such as UE 115 or 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 1000. Method 1000 may employ mechanisms similar to those described above with respect to

[0123] Figure 10 and / or methods 600, 700, and 800 described respectively with respect to Figure 2 and 3 as shown. Method 1000 includes a plurality of enumerated steps, but embodiments of method 1000 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. Figure 6 、 7 and 8. As shown, method 1000 includes a plurality of enumerated steps, but embodiments of method 1000 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.

[0124] At block 1010, UE 400 receives a monitoring configuration specifying a plurality of CORESETs that are different from each other (e.g., different frequencies, CCE mappings, REG bundlings, and / or TCI states, etc.). In some instances, the unit for performing the functions of step 1010 may but does not necessarily include, for example, the PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404 with reference to Figure 4 is a flowchart 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 circuitry, and / or other suitable components) of a wireless communication device or other suitable units for performing these steps. For example, a wireless communication device (such as UE 115 or 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 1000. Method 1000 may employ mechanisms similar to those described above with respect to

[0125] At block 1020, method 1000 includes: receiving an indication initiating the triggering of multi-CORESET search space monitoring. The indication can take various forms, such as an explicit activation of multi-CORESET PDCCH monitoring via an RRC configuration message, a UE-specific DCI message, or a group common DCI message. As another example, the activation can be implicit via the activation of some other configuration that the device has been pre-configured to recognize as an indication to activate multi-CORESET monitoring.

[0126] At block 1030, UE 400 determines whether conditions are imposed on when multi-CORESET monitoring according to embodiments of the present disclosure can begin. For example, multi-CORESET monitoring may be conditioned on the size of the CORESET (in terms of the number of RBs and / or OFDM symbols). As another example, it may be conditioned on the available frequency range. As yet another example, multi-CORESET monitoring may be conditioned on the subcarrier spacing. As another example, it may be conditioned on the type of search space (e.g., UE-specific search space versus common search space). These are just a few examples. The multi-CORESET can be conditioned on any one or more of such examples (e.g., a subset or all of them). Block 1030 may be optional. In some cases, according to embodiments of the present disclosure, BS 500 may not configure UE 400 to depend on any such conditions for multi-CORESET monitoring. In such a case, UE 400 can proceed from block 1020 to decision block 1050 without having to test the operating conditions.

[0127] At decision block 1040, UE 400 determines whether the conditions determined from block 1030 have been met. For example, in the case where a condition is imposed that requires a CORESET of at least a certain size (e.g., greater than a certain size or less than a certain size), UE 400 can determine whether the size condition has been met. As another example, in the case where the condition is regarding the frequency range, UE 400 can determine whether the range has been met. Regardless of the condition imposed, if UE 400 determines that the condition has not been met, UE 400 can return to block 1030. In this case, the operation will continue to check whether the condition has been met, unless a stop multi-CORESET monitoring is signaled to UE 400 via another monitoring configuration message and / or indication message.

[0128] Alternatively, if UE 400 determines at decision block 1040 that the condition has been met, method 1000 proceeds to decision block 1050.

[0129] At decision block 1050, UE 400 determines whether the indication received at block 100 is a signal that activates PDCCH monitoring aggregation (referred to elsewhere herein as implicit signaling for multi-CORESET monitoring using PDCCH monitoring aggregation) or alternatively is some other configuration message for non-aggregated multi-CORESET monitoring (the case of explicit signaling referred to elsewhere herein).

[0130] If the indication is not to activate PDCCH monitoring aggregation, for example, it is alternatively an explicit signal, then method 1000 proceeds to block 1060. At block 1060, UE 400 begins to monitor a non-aggregated CORESET for PDCCH transmissions. Although the CORESET monitoring occasion is non-aggregated in this case, diversity in terms of frequency, CCE mapping, REG bundling, TCI state, or some combination of these items is provided among the CORESETs according to embodiments of the present disclosure.

[0131] Returning to decision block 1040, if alternatively UE 400 determines that the indication is to activate PDCCH monitoring aggregation, then method 1000 proceeds to block 1070. At block 1070, UE 400 initiates monitoring of the search space for a plurality of included monitoring occasions for repeated PDCCH transmissions (i.e., repeated in each monitoring occasion of the search space).

[0132] In some instances, the units for performing the functions of the blocks of method 1000 may but do not necessarily include, for example, the PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404 with reference to Figure 4 The PDCCH monitoring module 408, transceiver 410, antenna 416, processor 402, and / or memory 404.

[0133] Figure 11 is a flowchart 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 circuitry, and / or other suitable components) of a wireless communication device or other suitable units for performing these steps. For example, a wireless communication device (such as BS 105 or 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 1100. Method 1100 may adopt a structure as described above with respect to Figure 2 and 3 described structure and / or respectively with respect to Figure 6 、 7Similar mechanisms in the methods 600, 700, and 800 described in and 8. As shown, the method 1100 includes a plurality of recited steps, but embodiments of the method 1100 may include additional steps before, after, and between the recited steps. In some embodiments, one or more of the recited steps may be omitted or performed in a different order.

[0134] At block 1110, the BS 500 sends a monitoring configuration message specifying a plurality of CORESETs (e.g., different frequencies, CCE mappings, REG bundlings, and / or TCI states, to name a few examples) that are different from each other to one or more UEs (such as UE 400).

[0135] At decision block 1120, the BS 500 determines whether to use PDCCH monitoring aggregation. If not, the method 1100 proceeds to decision block 1130.

[0136] At decision block 1130, the BS 500 determines whether it will send an explicit indication of when to start multi-CORESET monitoring at 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.

[0137] At block 1140, according to an embodiment of the present disclosure, the BS 500 sends an explicit indication (e.g., via one of the methods described above) to the UE 400 to trigger the UE 400 to start non-aggregated multi-CORESET PDCCH monitoring. Although the CORESET monitoring occasion is non-aggregated in this case, diversity in frequency, CCE mapping, REG bundling, TCI state, or some combination of these items is provided between the CORESETs according to embodiments of the present disclosure.

[0138] Returning to decision block 1130, if instead there is no explicit indication, the method 1100 may proceed to block 1160 without the action of block 1140. For example, this may correspond to a situation where the UE 400 is pre-configured (e.g., via the monitoring configuration 1110) to start multi-CORESET monitoring by default without activation, thereby reducing at least one aspect of signaling overhead.

[0139] Now returning to decision block 1120, if the BS 500 determines to use monitoring aggregation, the method 1100 instead proceeds to block 1150.

[0140] At block 1150, the BS 500 prepares and sends an indication to initiate PDCCH monitoring aggregation to the UE 400. According to embodiments of the present disclosure, this can be an implicit indication for the UE 400 to also start multi-CORESET monitoring according to embodiments of the present disclosure. Alternatively, the indication to initiate PDCCH monitoring aggregation can also include an explicit bit or combination of bits that indicates to the UE 400 to also start multi-CORESET monitoring as part of the PDCCH monitoring aggregation. The indication can be sent as part of an RRC configuration message, a MAC CE, UE-specific DCI, or group-common DCI. Method 1100 proceeds from block 1150 to block 1160.

[0141] At block 1160, whether from block 1140 or from block 1150, the BS 500 continues to send one or more PDCCHs to the UE 400 in different CORESETs (e.g., different in terms of frequency, CCE mapping, REG bundling, TCI state, some combination of these items, etc.).

[0142] Figure 12 FIG. is a diagram illustrating an example resource structure 1200 for wireless communication in accordance with various aspects of the present disclosure. Resource structure 1200 illustrates examples of the various resource groups described herein. As shown, resource structure 1200 can include subframe 1205. Subframe 1205 can include a plurality of time slots 1210. Although resource structure 1200 is shown as including 2 time slots per subframe, a different number of time slots can be included in a subframe (e.g., 4 time slots, 8 time slots, 16 time slots, and 32 time slots, etc.). In some aspects, different types of transmission time intervals (TTIs) can be used in addition to subframes and / or time slots. Time slot 1210 can include a plurality of symbols 1215, such as 7 symbols or 14 symbols per time slot.

[0143] The potential control region of slot 1210 may be referred to as a control resource set (CORESET) 1220 and may be configured to support efficient use of resources, such as by flexibly configuring or reconfiguring the resources for one or more physical downlink control channels (PDCCHs), one or more physical downlink shared channels (PDSCHs), etc. In some aspects, CORESET 1220 may occupy the first symbol 1215 of slot 1210, the first two symbols 1215 of slot 1210, or the first three symbols 1215 of slot 1210. Thus, CORESET 1220 may include multiple resource blocks (RBs) in the frequency domain and one, two, or three symbols in the time domain. In 5G, the amount of resources included in CORESET 1220 can be flexibly configured, such as by using radio resource control (RRC) signaling to indicate the frequency domain region (e.g., the number of resource blocks) and / or the time domain region (e.g., the number of symbols) for CORESET 1220.

[0144] As shown, the symbol 1215 including CORESET 1220 may include one or more control channel elements (CCEs) 1225, shown as two CCEs 1225 as an example, which span a portion of the system bandwidth. The CCE 1225 may include downlink control information (DCI) for providing control information for wireless communication. The base station may transmit DCI during multiple CCEs 1225 (as shown), where the number of CCEs 1225 used for the transmission of DCI represents the aggregation level (AL) used by the BS for the transmission of DCI. In Figure 12 it, as an example, aggregation level two is shown, which corresponds to two CCEs 1225 in slot 1210. In some aspects, different aggregation levels (such as 1, 4, 8, 16, etc.) may be used.

[0145] Each CCE 1225 may include a fixed number of resource element groups (REGs) 1230 (shown as 4 REGs 1230) or may include a variable number of REGs 1230. In some aspects, the number of REGs 1230 included in CCE 1225 may be specified by the REG bundling size. The REG 1230 may include one resource block, and the resource block may include 12 resource elements (REs) 1235 within the symbol 1215. The resource element 1235 may occupy one subcarrier in the frequency domain and one OFDM symbol in the time domain.

[0146] The search space can include all possible locations where the PDCCH may be located (e.g., in time and / or frequency). CORESET 1220 can include one or more search spaces, such as UE-specific search spaces, group common search spaces, and / or common search spaces. The search space can indicate a set of CCE locations where the UE can find the PDCCH potentially used to send control information to the UE. The possible locations of the PDCCH can depend on whether the PDCCH is UE-specific (e.g., for a single UE) or group common (e.g., for multiple UEs), the aggregation level used, etc. The possible locations of the PDCCH (e.g., in time and / or frequency) can be referred to as PDCCH candidates, and the set of all possible PDCCH locations can be referred to as the search space. For example, the set of all possible PDCCH locations for a specific UE can be referred to as the UE-specific search space. Similarly, the set of all possible PDCCH locations across all UEs can be referred to as the common search space. The set of all possible PDCCH locations for a specific UE group can be referred to as the group common search space.

[0147] CORESET 1220 can be interleaved or non-interleaved. The interleaved CORESET 1220 can have a CCE-to-REG mapping such that adjacent CCEs are mapped to dispersed REG bundles in the frequency domain (e.g., adjacent CCEs are not mapped to consecutive REG bundles of CORESET 1220). The non-interleaved CORESET 1220 can have a CCE-to-REG mapping such that all CCEs are mapped to consecutive REG bundles of CORESET 1220 (e.g., in the frequency domain).

[0148] The base station can send repetitions of the DCI on multiple PDCCH monitoring occasions to facilitate connection reliability and successful reception of the DCI by the UE. In some cases, the monitoring occasions can be aggregated. Each aggregated set of monitoring occasions can be assigned one or more CCEs, and the aggregation level can indicate the number of CCEs assigned. The transmission of the repetition of the DCI on the PDCCH monitoring occasion can be referred to as the "enhanced coverage PDCCH" process.

[0149] In a typical implementation, a search space is associated with a single CORESET that is configured with a type of frequency allocation as well as REG bundling and CCE mapping. Without adding some form of diversity, the repetition of DCI sent on multiple PDCCH monitoring occasions of the search space will use the same frequency resources and / or beams for each PDCCH detection occasion within the PDCCH monitoring occasion. This can lead to increased blocking probability, interference, and reduced connection reliability. The index of the CCE within the search space (e.g., the location of the CCE) is determined using a hash function that is a function of the carrier indicator field, the slot number, the aggregation level, the radio network temporary identifier (RNTI), the PDCCH candidate index, and the aggregation level.

[0150] 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 on multiple PDCCH monitoring occasions of the search space. In some aspects, at least two 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 way, aspects can facilitate providing diversity of frequencies.

[0151] In some aspects, the frequency diversity configuration (or monitoring configuration) may be activated at least partially based on the activation of PDCCH monitoring aggregation or at least partially based on a dedicated activation indicator. In this way, the configuration can be deactivated during situations where frequency 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 where frequency diversity may be more beneficial. Thus, aspects can result in a more efficient implementation of enhanced coverage, which can facilitate reduced blocking probability, reduced interference, and enhanced connection reliability.

[0152] As indicated in 3GPP 38.213, the set of CCE indices corresponding to the PDCCH candidates of the search space is given by a hash function. For a search space set s associated with CORESETp, for the active downlink (DL) bandwidth part (BWP) of the serving cell corresponding to the carrier indicator field value n Cl the CCE index of the aggregation level L corresponding to the PDCCH candidates of the search space set within the slot is given by: For any common search space (CSS),

[0153]

[0154] where

[0155] For a UE-specific search space (USS),

[0156] For pmod3 = 0, A p = 39827, for pmod3 = 1, A p = 39829,

[0157] For pmod3 = 2, A p = 39839, and D = 65537;

[0158] i = 0,..., L-1;

[0159] N CCE,p is the number of CCEs in CORESETp, numbered from 0 to N CCE,p -1;

[0160] If the UE is configured with a carrier indicator field by CrossCarrierSchedulingConfig for the serving cell on which the PDCCH is monitored, then n Cl is the carrier indicator value; otherwise, including for any CSS, n Cl = 0;

[0161] where is the number of PDCCH candidates for which the UE is configured to monitor the aggregation level L of the search space set s corresponding to n Cl ;

[0162] For any CSS,

[0163] For the USS, is the maximum value of Cl over all configured values of n for the CCE aggregation level L of the search space set s; and the RNTI value for n is the cell RNTI (C-RNTI). RNTI

[0164] Thus, if two or more PDCCH monitoring occasions are achieved within a particular time slot (e.g., for monitoring by two or more different UEs), the positions of the corresponding CCEs will be the same. This can lead to increased PDCCH blocking, increased interference, and reduced connection reliability.

[0165] ​Aspects of the techniques and apparatus described herein can facilitate randomizing frequency resources for CCEs. Aspects can facilitate perturbing hash functions to create multiple new hash functions, where a CCE index is a function of the position of a corresponding PDCCH monitoring occasion within a time slot, a function of the index of a corresponding PDCCCH monitoring occasion, etc. In some aspects, a base station can configure a monitoring configuration that indicates multiple hash functions for identifying one or more CCE indices of a PDCCH candidate set for a search space. In some aspects, a hash function can be modified by an additive factor, a multiplicative factor, etc. In this manner, aspects can facilitate providing a hash function that determines a CCE index as a function of a monitoring occasion position, a monitoring occasion index, etc. Accordingly, aspects can facilitate reducing PDCCH blocking, reducing interference, and improving connection reliability.

[0166] In some aspects, a monitoring configuration can be activated at least in part based on activation of PDCCH monitoring aggregation or at least in part based on a dedicated activation indication. In this manner, the monitoring configuration can be deactivated during situations where 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 where CCE index diversity may be more beneficial. Accordingly, aspects can result in a more efficient implementation of enhanced coverage, which can facilitate a reduced blocking probability, reduced interference, and enhanced connection reliability.

[0167] As indicated above, Figure 12 is provided as an example. Other examples may be different from those Figure 12 described with respect to

[0168] Figure 13 FIG. 1300 is a diagram illustrating an example 1300 of techniques for hash function perturbation for PDCCH monitoring aggregation in accordance with aspects of the present disclosure. As Figure 13 shown therein, a base station 105 and a UE 115 can communicate with each other.

[0169] As indicated by reference numeral 1305, the base station 105 can transmit a monitoring configuration, and the UE 115 can receive the monitoring configuration. In some aspects, the monitoring configuration can include repetition of DCI on multiple PDCCH monitoring occasions of a search space. In some aspects, the monitoring configuration can indicate multiple hash functions for identifying one or more CCC indices corresponding to one or more CCEs 1310 and 1320 of a PDCCH candidate set for a search space.

[0170] In some aspects, the hash function among multiple hash functions can depend on the position of the corresponding PDCCH monitoring occasion 1325 among multiple PDCCH monitoring occasions 1325, the index associated with the corresponding PDCCH monitoring occasion 1325, and / or a combination thereof. For example, as shown, in some aspects, the hash function (and thus the position of CCE 1310 or 1320) can depend on the position of the corresponding PDCCH monitoring occasion 1325 within the time slot 1330. As further shown, the hash function (and thus the position of CCE 1310 or 1320) can depend on the position or index of the corresponding PDCCH monitoring occasion 1325 within the aggregation 1335 of the time slot 1330.

[0171] In some aspects, as discussed above in connection with Figure 12 the hash function can include a main term multiplied by a modulo function. The main term can include the index associated with the corresponding PDCCH monitoring occasion. In some aspects, the index associated with the corresponding PDCCH monitoring occasion can include the index of the initial symbol of the corresponding PDCCH monitoring occasion, the index of the corresponding PDCCH monitoring occasion, etc.

[0172] According to various aspects, the main term can include a first term and a second term, the first term including a multiplication factor multiplied by a first variable that is at least partially based on the RNTI associated with the UE, and the second term being at least partially based on the number of PDCCH candidates in the PDCCH candidate set.

[0173] In some aspects, the index associated with the corresponding PDCCH monitoring occasion can be added to the first term and the second term. For example, in some aspects, the hash function described above in connection with Figure 12 can be modified by adding the index K to the first term and the second term to give:

[0174]

[0175] In some aspects, the index associated with the corresponding PDCCH monitoring occasion can be multiplied by a multiplication factor. That is, for example, A p can be multiplied by the index K. According to aspects of the present disclosure, any number of other mathematical operations can be performed to modify an existing hash function to generate a new hash function.

[0176] As indicated by reference numeral 1340, base station 105 may send an activation indication, and UE 115 may receive the activation indication. 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), UE-specific DCI, group common DCI, etc. As indicated by reference numeral 1345, the activation indication may cause UE 115 to activate a hash function among a plurality of configured hash functions. In some aspects, the activation indication may cause UE 115 to directly or indirectly activate the hash function.

[0177] In some aspects, for example, the activation indication may include a PDCCH monitoring aggregation process activation indication. UE 115 may activate the PDCCH monitoring aggregation process at least in part based on the PDCCH monitoring aggregation process activation indication. In some aspects, UE 115 may activate a hash function among a plurality of configured hash functions at least in part based on the activation of the PDCCH monitoring aggregation process. In some aspects, the activation indication may include a hash function perturbation activation indication. UE 115 may activate the hash function at least in part based on the hash function perturbation activation indication.

[0178] As indicated by reference numeral 450, UE 115 may monitor DCI in a search space associated with a plurality of PDCCH monitoring occasions at least in part based on a monitoring configuration. As indicated by reference numeral 1355, base station 105 may send DCI, and UE 115 may receive the DCI. In some aspects, base station 105 may send DCI on a plurality of PDCCH monitoring occasions at least in part based on the monitoring configuration.

[0179] In some aspects, UE 115 and / or base station 105 may determine that a parameter satisfies a condition, and UE 115 may perform PDCCH monitoring at least in part based on the determination that the parameter satisfies the condition. In some aspects, the parameter may indicate the size of a CORESET associated with the search space (e.g., in terms of the number of RBs, the number of orthogonal frequency division multiplexing (OFDM) symbols, etc.), the size of the bandwidth associated with the search space (e.g., in terms of the number of RBs), the frequency range associated with the search space, the subcarrier spacing associated with the search space, the type of search space associated with the search space (e.g., UE-specific search space, common search space, etc.), etc.

[0180] Aspects of the techniques and apparatus described herein can facilitate randomizing frequency resources for CCEs, thereby providing diversity in CCE locations. Aspects can facilitate perturbing a hash function to create multiple new hash functions, where the CCE index is a function of the position of the corresponding PDCCH monitoring occasion within a time slot, a function of the index of the corresponding PDCCCH monitoring occasion, etc. Thus, aspects can result in a more efficient implementation of enhanced coverage, which can facilitate reduced blocking probability, reduced interference, and enhanced connection reliability.

[0181] As noted above, Figure 13 is provided as an example. Other examples may differ from those Figure 13 described with respect to

[0182] Figure 14 FIG. 1400 is a diagram illustrating an example of PDCCH monitoring with frequency diversity in accordance with aspects of the present disclosure. As Figure 14 shown, base station 105 and UE 115 may communicate with each other.

[0183] As indicated by reference numeral 1405, base station 105 may transmit a frequency diversity configuration (which may be a monitoring configuration or included in a monitoring configuration), and UE 115 may receive the frequency diversity configuration. In some aspects, the frequency diversity configuration may include repetition of DCI on multiple PDCCH monitoring occasions of a search space. In some aspects, as shown, at least two of the multiple PDCCH monitoring occasions, PDCCH monitoring occasions 1410 and 1415, may be associated with different frequency resource allocations.

[0184] In some aspects, base station 105 may transmit an indication of a frequency offset 1420 associated with at least one of the at least two PDCCH monitoring occasions 1410 and 1415, and UE 115 may receive the indication of the frequency offset 1420. In some aspects, receiving an indication of a frequency offset may include receiving an indication of the frequency allocation of a CORESET associated with a search space. The frequency allocation of the CORESET may indicate the frequency offset. In some aspects, the frequency offset may be a multiple of six resource blocks (RBs).

[0185] In some aspects, as shown, a first PDCCH monitoring occasion 1410 can be associated with a first frequency resource allocation, and a second PDCCH monitoring occasion 1415 can be associated with a second frequency resource allocation. The second frequency resource allocation can indicate a frequency offset 1420. In some aspects, the indication of the frequency offset 1420 can 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 position of the second PDCCH monitoring occasion 1415 within a time slot 1425).

[0186] In some aspects, a frequency diversity configuration can indicate a specified number of PDCCH monitoring occasions per time slot, and the frequency offset 1420 can be associated with the specified monitoring occasion per time slot. For example, as shown, the frequency offset 1420 can be associated with the second PDCCH monitoring occasion 1415 in each time slot 1425. In some aspects, as shown, the frequency diversity configuration can indicate a specified number of PDCCH monitoring occasions 1410 and 1415 for each aggregated monitoring occasion 1430. The frequency offset 1420 can be associated with the specified monitoring occasion 1415 of each aggregated monitoring occasion 1430. For example, as shown, the frequency offset 1420 can be associated with the second monitoring occasion 1415 of the aggregated monitoring occasion 1430.

[0187] In some aspects, the frequency offset 1420 can be associated with a subset of multiple PDCCH monitoring occasions that includes a second PDCCH monitoring occasion and at least a third PDCCH monitoring occasion. For example, in some aspects, the frequency offset 1420 can be associated with the second and third PDCCH monitoring occasions among the multiple PDCCH monitoring occasions.

[0188] As indicated by reference numeral 1435, the base station 105 can send an activation indication, and the UE 115 can receive the activation indication. According to various aspects, the activation indication can be carried in a radio resource control (RRC) message configuration, a medium access control (MAC) control element (MAC-CE), UE-specific DCI, group common DCI, etc. As indicated by reference numeral 1440, the activation indication can cause the UE 115 to activate the frequency diversity configuration. In some aspects, the activation indication can cause the UE 115 to activate the frequency diversity configuration directly or indirectly.

[0189] In some aspects, for example, the activation indication may include a PDCCH monitoring aggregation process activation indication. The UE 115 may activate the PDCCH monitoring aggregation process at least in part based on the PDCCH monitoring aggregation process activation indication. In some aspects, the UE 115 may activate the frequency diversity configuration at least in part based on the activation of the PDCCH monitoring aggregation process. In some aspects, the activation indication may include a frequency diversity configuration activation indication. The UE 115 may activate the frequency diversity configuration at least in part based on the frequency diversity configuration activation indication.

[0190] As indicated by reference numeral 1445, the UE 115 may monitor DCI in a search space associated with multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration. As indicated by reference numeral 1450, the base station 105 may transmit DCI, and the UE 115 may receive DCI. In some aspects, the base station 105 may transmit DCI on multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0191] In some aspects, the UE 115 and / or the base station 105 may determine that a parameter satisfies a condition, and the UE 115 may perform PDCCH monitoring at least in part based on the determination that the parameter satisfies the condition. In some aspects, the parameter may indicate the size of a CORESET associated with a search space (e.g., in terms of the number of RBs, the number of orthogonal frequency division multiplexing (OFDM) symbols, etc.), the size of the bandwidth associated with the search space (e.g., in terms of the number of RBs), the frequency range associated with the search space, the subcarrier spacing associated with the search space, the type of search space associated with the search space (e.g., UE-specific search space, common search space, etc.), and so on.

[0192] Aspects of the techniques and apparatuses described herein may facilitate providing frequency diversity when repeating the transmission of DCI using multiple PDCCH monitoring occasions. Thus, aspects may result in more efficient implementation of enhanced coverage, which may facilitate reduced blocking probability, reduced interference, and enhanced connection reliability.

[0193] As noted above, Figure 14 is provided as an example. Other examples may be different from those described with respect to Figure 14 described.

[0194] Figure 15 is a diagram illustrating an example process 1500, such as may be performed by a UE, in accordance with aspects of the present disclosure. The example process 1500 is an example in which a UE (e.g., UE 115 or 400, etc.) performs operations associated with techniques for PDCCH monitoring using frequency diversity.

[0195] AsFigure 15 As shown, in some aspects, process 1500 may include: receiving a frequency diversity configuration (which may be a monitoring configuration or included within a monitoring configuration), where the frequency diversity configuration includes repetition of DCI on multiple PDCCH monitoring occasions of a search space, and at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations (block 1510). For example, a UE (e.g., using processor 402, memory 404, PDCCH monitoring module 408, transceiver 410, etc.) may receive a frequency diversity configuration as described above. In some aspects, UE 115 may include a unit for receiving a 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 on multiple PDCCH monitoring occasions of a search space. In some aspects, at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations.

[0196] As Figure 15 As further shown, in some aspects, process 1500 may include: monitoring DCI in a search space associated with multiple PDCCH monitoring occasions at least partially based on the frequency diversity configuration (block 1520). For example, a UE (e.g., using transceiver 410, controller / processor 402, memory 404, PDCCH monitoring module 408, etc.) may monitor DCI in a search space associated with multiple PDCCH monitoring occasions at least partially based on the frequency diversity configuration as described above. In some aspects, UE 115 may include a unit for monitoring DCI, such as transceiver 410, controller / processor 402, memory 404, PDCCH monitoring module 408, or antenna 416.

[0197] Process 1500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0198] In a first aspect, at least two PDCCH monitoring occasions are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

[0199] In a second aspect, alone or in combination with the first aspect, process 1500 includes: receiving an indication of a frequency offset associated with at least one of the at least two PDCCH monitoring occasions.

[0200] In a third aspect, either 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 a search space, wherein the frequency allocation of the CORESET indicates the frequency offset.

[0201] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the frequency offset is a multiple of six RBs.

[0202] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, a first PDCCH monitoring occasion among at least two PDCCH monitoring occasions is associated with a first frequency resource allocation, wherein a second PDCCH monitoring occasion among the at least two PDCCH monitoring occasions is associated with a second frequency resource allocation, and wherein the second frequency resource allocation indicates the frequency offset, and wherein an indication of the frequency offset indicates the frequency offset as a function of an initial symbol of the second PDCCH monitoring occasion.

[0203] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the frequency offset is associated with a subset of a plurality of PDCCH monitoring occasions, the subset including the second PDCCH monitoring occasion and at least a third PDCCH monitoring occasion.

[0204] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, a frequency diversity configuration indicates a specified number of PDCCH monitoring occasions per time slot, and the frequency offset is associated with the specified monitoring occasion per time slot.

[0205] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, a frequency diversity configuration indicates a specified number of PDCCH monitoring occasions per aggregated monitoring occasion, and the frequency offset is associated with the specified monitoring occasion per aggregated monitoring occasion.

[0206] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, procedure 1500 includes: activating a PDCCH monitoring aggregation procedure; and activating a frequency diversity configuration at least in part based on the activation of the PDCCH monitoring aggregation procedure.

[0207] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, procedure 1500 includes: receiving a PDCCH monitoring aggregation procedure activation indication, wherein the activation of the PDCCH monitoring aggregation procedure is at least in part based on the PDCCH monitoring aggregation procedure activation indication.

[0208] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the PDCCH monitoring aggregation process activation indication is carried in at least one of the following: RRC message configuration, MAC-CE, UE-specific DCI, group common DCI, or a combination thereof.

[0209] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, process 1500 includes: receiving a frequency diversity configuration activation indication; and activating the frequency diversity configuration at least in part based on the frequency diversity configuration activation indication.

[0210] In a thirteenth aspect, either 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 the following: RRC message configuration, MAC-CE, UE-specific DCI, group common DCI, or a combination thereof.

[0211] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, process 1500 includes: determining that a parameter satisfies a condition, wherein monitoring for DCI in a search space associated with a plurality of PDCCH monitoring occasions is at least in part based on the determination that the parameter satisfies the condition at least in part based on the frequency diversity configuration.

[0212] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, the parameter indicates at least one of the following: the size of a CORESET associated with the search space, the size of the bandwidth associated with the search space, the frequency range associated with the search space, the subcarrier spacing associated with the search space, the type of search space associated with the search space, or a combination thereof.

[0213] In a sixteenth aspect, either 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 following: the number of RBs, the number of OFDM symbols, or a combination thereof.

[0214] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the size of the bandwidth includes the number of RBs.

[0215] In an eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, the type of search space includes a UE-specific search space or a common search space.

[0216] While Figure 15 example boxes of process 1500 are shown, in some aspects, process 1500 may include Figure 15fewer boxes, different boxes, or boxes arranged in a different manner than those depicted in [the figure]. Additionally or alternatively, two or more of the boxes of process 1500 may be executed in parallel.

[0217] Figure 16 is a diagram illustrating an example process 1600, such as may be performed by a base station, in accordance with various aspects of the present disclosure. Example process 1600 is an example in which a base station (e.g., base station 105 or 500, etc.) performs operations associated with techniques for using frequency diversity for PDCCH monitoring.

[0218] As Figure 16 shown in [the figure], in some aspects, process 1600 may include: sending a frequency diversity configuration (which may be a monitoring configuration or included within a monitoring configuration) to UE 115, where the frequency diversity configuration includes repetition of DCI on a plurality of PDCCH monitoring occasions of a search space, and where at least two of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations (block 1610). For example, a base station (e.g., using transceiver 510, controller / processor 502, memory 504, etc.) may send a frequency diversity configuration to UE 115 as described above. In some aspects, base station 105 may include a unit for sending the frequency diversity configuration, such as controller / processor 502, transceiver 510, DL control channel module 508, or antenna 516. In some aspects, the frequency diversity configuration includes repetition of DCI on a plurality of PDCCH monitoring occasions of a search space. In some aspects, at least two of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations.

[0219] As Figure 16 further shown in [the figure], in some aspects, process 1600 may include: sending DCI on a plurality of PDCCH monitoring occasions at least in part based on the frequency diversity configuration (block 1620). For example, a base station (e.g., using transceiver 510, controller / processor 502, memory 504, DL control channel module 508, etc.) may send DCI on a plurality of PDCCH monitoring occasions at least in part based on the frequency diversity configuration as described above. In some aspects, the base station may include a unit for sending DCI, such as controller / processor 502, transceiver 510, DL control channel module 508, or antenna 516.

[0220] Process 1600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0221] In a first aspect, at least two PDCCH monitoring occasions are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

[0222] In a second aspect, either alone or in combination with the first aspect, process 1600 includes: transmitting an indication of a frequency offset associated with at least one of the at least two PDCCH monitoring occasions.

[0223] In a third aspect, either alone or in combination with one or more of the first and second aspects, transmitting an indication of a frequency offset includes: transmitting an indication of a frequency allocation of a CORESET associated with a search space, the frequency allocation of the CORESET indicating the frequency offset.

[0224] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the frequency offset is a multiple of six RBs.

[0225] In a fifth aspect, either 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.

[0226] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the frequency offset is associated with a subset of multiple PDCCH monitoring occasions, the subset including the second PDCCH monitoring occasion and at least a third PDCCH monitoring occasion.

[0227] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, a frequency diversity configuration indicates a specified number of PDCCH monitoring occasions per time slot, and the frequency offset is associated with the specified monitoring occasion of each time slot.

[0228] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, a frequency diversity configuration indicates a specified number of PDCCH monitoring occasions per aggregated monitoring occasion, and the frequency offset is associated with the specified monitoring occasion of each aggregated monitoring occasion.

[0229] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, process 1600 includes: transmitting a PDCCH monitoring aggregation process activation indication, wherein the PDCCH monitoring aggregation process activation indication will cause activation of the PDCCH monitoring aggregation process, and wherein the frequency diversity configuration is activated at least partially based on the activation of the PDCCH monitoring aggregation process.

[0230] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the PDCCH monitoring aggregation process activation indication is carried in at least one of the following: RRC message configuration, MAC-CE, UE-specific DCI, group common DCI, or a combination thereof.

[0231] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, process 1600 includes: sending a frequency diversity configuration activation indication, wherein the frequency diversity configuration activation indication will cause activation of the frequency diversity configuration.

[0232] In a twelfth aspect, either 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 the following: RRC message configuration, MAC-CE, UE-specific DCI, group common DCI, or a combination thereof.

[0233] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, process 1600 includes: determining that a parameter satisfies a condition, wherein monitoring for DCI in a search space associated with a plurality of PDCCH monitoring occasions is at least partially based on the determination that the parameter satisfies the condition and is at least partially based on the frequency diversity configuration.

[0234] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the parameter indicates at least one of the following: the size of a CORESET associated with the search space, the size of the bandwidth associated with the search space, the frequency range associated with the search space, the subcarrier spacing associated with the search space, the type of search space associated with the search space, or a combination thereof.

[0235] In a fifteenth aspect, either 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 following: the number of RBs, the number of OFDM symbols, or a combination thereof.

[0236] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the size of the bandwidth includes the number of RBs.

[0237] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the type of search space includes a UE-specific search space or a common search space.

[0238] While Figure 16illustrates example blocks of process 1600, but in some aspects, process 1600 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner compared to those depicted in Figure 16 In addition or alternatively, two or more of the blocks of process 1600 may be executed in parallel.

[0239] Figure 17 FIG. is a diagram illustrating an example process 1700, such as may be performed by a UE, in accordance with various aspects of the present disclosure. Example process 1700 is an example in which a UE (e.g., UE 115, 400, etc.) performs operations associated with techniques for hash function perturbation for PDCCH monitoring aggregation.

[0240] As Figure 17 shown, in some aspects, process 1700 may include: receiving a monitoring configuration, where the monitoring configuration includes repetitions of DCI on a plurality of PDCCH monitoring occasions of a search space, where the monitoring configuration indicates a plurality of hash functions for identifying a set of PDCCH candidates of the search space, where a hash function of the plurality of hash functions depends on at least one of: the position of the corresponding PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof (block 1710). For example, a UE (e.g., using transceiver 410, controller / processor 402, memory 404, PDCCH monitoring module 408, etc.) may receive a monitoring configuration as described above. In some aspects, UE 115 may include a unit for receiving a monitoring configuration, such as transceiver 410, controller / processor 402, memory 404, PDCCH monitoring module 408, or antenna 416. In some aspects, the monitoring configuration includes repetitions of DCI on a plurality of PDCCH monitoring occasions of a search space. In some aspects, the monitoring configuration indicates a plurality of hash functions for identifying a set of PDCCH candidates of the search space. In some aspects, a hash function of the plurality of hash functions depends on at least one of: the position of the corresponding PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof.

[0241] As Figure 17As further shown in, in some aspects, process 1700 may include: monitoring DCI in a search space associated with a plurality of PDCCH monitoring occasions, at least in part based on a hash function (block 1720). For example, UE 115 (e.g., using transceiver 410, controller / processor 402, memory 404, PDCCH monitoring module 408, etc.) may monitor DCI in a search space associated with a plurality of PDCCH monitoring occasions, at least in part based on a hash function. In some aspects, UE 115 may include units for monitoring DCI, such as transceiver 410, controller / processor 402, memory 404, PDCCH monitoring module 408, or antenna 416.

[0242] Process 1700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0243] In a first aspect, the hash function depends on the position of the corresponding PDCCH monitoring occasion within a time slot.

[0244] In a second aspect, alone or in combination with the first aspect, the hash function includes a main term multiplied by a modulo function, and the main term includes an index associated with the corresponding PDCCH monitoring occasion.

[0245] 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 the index of the initial symbol of the corresponding PDCCH monitoring occasion, the index of the corresponding PDCCH monitoring occasion, or a combination thereof.

[0246] 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 that includes a multiplication factor multiplied by a first variable that is at least in part based on the RNTI associated with the UE; and a second term that is at least in part based on the number of PDCCH candidates in the PDCCH candidate set.

[0247] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the index associated with the corresponding PDCCH monitoring occasion is added to the first and second terms.

[0248] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the index associated with the corresponding PDCCH monitoring occasion is multiplied by a multiplication factor.

[0249] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 1700 includes: activating a PDCCH monitoring aggregation process; and activating a hash function at least in part based on the activation of the PDCCH monitoring aggregation process.

[0250] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, process 1700 includes: receiving a PDCCH monitoring aggregation process activation indication, wherein the activation of the PDCCH monitoring aggregation process is at least in part based on the PDCCH monitoring aggregation process activation indication.

[0251] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the PDCCH monitoring aggregation process activation indication is carried in at least one of the following: an RRC message configuration, a MAC-CE, UE-specific DCI, group common DCI, or a combination thereof.

[0252] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, process 1700 includes: receiving a hash function perturbation activation indication; and activating a hash function at least in part based on the hash function interference activation indication.

[0253] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the hash function perturbation activation indication is carried in at least one of the following: an RRC message configuration, a MAC-CE, UE-specific DCI, group common DCI, or a combination thereof.

[0254] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, process 1700 includes: determining that a parameter satisfies a condition, wherein monitoring for DCI in a search space associated with a plurality of PDCCH monitoring occasions is at least in part based on the determination that the parameter satisfies the condition and at least in part based on a hash function.

[0255] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the parameter indicates at least one of the following: the size of a CORESET associated with the search space, the frequency range associated with the search space, the subcarrier spacing associated with the search space, or a combination thereof.

[0256] In a fourteenth aspect, either 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 following: the number of RBs, the number of OFDM symbols, or a combination thereof.

[0257] Although Figure 17illustrates an example block of process 1700, but in some aspects, process 1700 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner compared to those depicted in Figure 17 In addition or alternatively, two or more of the blocks of process 1700 may be executed in parallel.

[0258] Figure 18 is a diagram illustrating an example process 1800, such as may be performed by a base station, in accordance with various aspects of the present disclosure. Example process 1800 is an example in which a base station (e.g., base station 105, 500, etc.) performs operations associated with techniques for hash function perturbation for PDCCH monitoring aggregation.

[0259] As Figure 18 shown, in some aspects, process 1800 may include: sending a monitoring configuration to UE 115, wherein the monitoring configuration includes repetitions of DCI on a plurality of PDCCH monitoring occasions of a search space, wherein the monitoring configuration indicates a plurality of hash functions for identifying a set of PDCCH candidates of the search space by one or more CCE indices, and wherein a hash function of the plurality of hash functions depends on at least one of: a location of a corresponding PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof (block 1810). For example, for example, base station 105 (e.g., using transceiver 510, controller / processor 502, memory 504, DL control channel module 508, etc.) may send a monitoring configuration to UE 115 as described above. In some aspects, base station 105 may include a unit for sending the monitoring configuration, such as controller / processor 502, transceiver 510, DL control channel module 508, or antenna 516. In some aspects, the monitoring configuration includes repetitions of DCI on a plurality of PDCCH monitoring occasions of a search space. In some aspects, the monitoring configuration indicates a plurality of hash functions for identifying a set of PDCCH candidates of the search space by one or more CCE indices. In some aspects, a hash function of the plurality of hash functions depends on at least one of: a location of a corresponding PDCCH monitoring occasion of the plurality of PDCCH monitoring occasions, an index associated with the corresponding PDCCH monitoring occasion, or a combination thereof.

[0260] As Figure 18As further shown in FIG. 0, in some aspects, process 1800 may include: transmitting DCI in a search space associated with a plurality of PDCCH monitoring occasions based at least in part on a hash function (block 1820). For example, base station 105 (e.g., using transceiver 510, controller / processor 502, memory 504, etc.) may transmit DCI in a search space associated with a plurality of PDCCH monitoring occasions based at least in part on a hash function. In some aspects, the base station may include units for transmitting DCI, such as controller / processor 502, transceiver 510, DL control channel module 508, or antenna 516.

[0261] Process 1800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0262] In a first aspect, the hash function depends on the position of the corresponding PDCCH monitoring occasion within a time slot.

[0263] In a second aspect, alone or in combination with the first aspect, the hash function includes a leading term multiplied by a modulo function, and the leading term includes an index associated with the corresponding PDCCH monitoring occasion.

[0264] 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 the index of the initial symbol of the corresponding PDCCH monitoring occasion, the index of the corresponding PDCCH monitoring occasion, or a combination thereof.

[0265] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the leading term includes: a first term that includes a multiplication factor multiplied by a first variable that is at least partially based on an RNTI associated with a UE; and a second term that is at least partially based on the number of PDCCH candidates in a PDCCH candidate set.

[0266] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the index associated with the corresponding PDCCH monitoring occasion is added to the first and second terms.

[0267] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the index associated with the corresponding PDCCH monitoring occasion is multiplied by a multiplication factor.

[0268] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 1800 includes: sending a PDCCH monitoring aggregation process activation indication, where the PDCCH monitoring aggregation process activation indication will cause the activation of the PDCH monitoring aggregation process, and where the hash function is at least partially activated based on the activation of the PDCC H monitoring aggregation process.

[0269] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the PDCCH monitoring aggregation process activation indication is carried in at least one of the following: RRC message configuration, MAC-CE, UE-specific DCI, group common DCI, or a combination thereof.

[0270] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, process 1800 includes: sending a hash function perturbation activation indication, where the hash function perturbation activation indication will cause the activation of the hash function.

[0271] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the hash function perturbation activation indication is carried in at least one of the following: RRC message configuration, MAC-CE, UE-specific DCI, group common DCI, or a combination thereof.

[0272] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, process 1800 includes: determining that a parameter satisfies a condition, where monitoring for DCI in a search space associated with a plurality of PDCCH monitoring occasions is at least partially based on the determination that the parameter satisfies the condition and is at least partially based on the hash function.

[0273] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the parameter indicates at least one of the following: the size of the CORESET associated with the search space, the frequency range associated with the search space, the subcarrier spacing associated with the search space, or a combination thereof.

[0274] In a thirteenth aspect, either 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 following: the number of RBs, the number of OFDM symbols, or a combination thereof.

[0275] Although Figure 18 example boxes of process 1800 are shown, in some aspects, process 1800 may include Figure 18fewer boxes, different boxes, or boxes arranged in a different manner than those depicted in [insert reference]. Additionally or alternatively, two or more of the boxes of process 1800 may be performed in parallel.

[0276] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: receiving a frequency diversity configuration, wherein the frequency diversity configuration includes a repetition of downlink control information (DCI) on multiple physical downlink control channel (PDCCH) monitoring occasions of a search space, wherein at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations; and monitoring DCI in the search space associated with the multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0277] In some aspects, a method of wireless communication performed by a base station includes: sending a frequency diversity configuration to a UE, wherein the frequency diversity configuration includes a repetition of DCI on multiple PDCCH monitoring occasions of a search space, wherein at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations; and sending DCI on the multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0278] In some aspects, a UE for wireless communication includes: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive a frequency diversity configuration, wherein the frequency diversity configuration includes a repetition of DCI on multiple PDCCH monitoring occasions of a search space, wherein at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations; and monitor DCI in the search space associated with the multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0279] In some aspects, a base station for wireless communication includes: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: send a frequency diversity configuration to a UE, wherein the frequency diversity configuration includes a repetition of DCI on multiple PDCCH monitoring occasions of a search space, wherein at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations; and send DCI on the multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0280] In some aspects, a non-transitory computer-readable medium storing an instruction set 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, where the frequency diversity configuration includes repetition of DCI on multiple PDCCH monitoring occasions of a search space, and at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations; and monitor DCI in the search space associated with the multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0281] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes: one or more instructions that, when executed by one or more processors of a base station, cause the base station to: send a frequency diversity configuration to a UE, where the frequency diversity configuration includes repetition of DCI on multiple PDCCH monitoring occasions of a search space, and at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations; and send DCI on the multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0282] In some aspects, a device for wireless communication may include units for: receiving a frequency diversity configuration, where the frequency diversity configuration includes repetition of DCI on multiple PDCCH monitoring occasions of a search space, and at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations; and monitoring DCI in the search space associated with the multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0283] In some aspects, a device for wireless communication may include units for: sending a frequency diversity configuration to a UE, where the frequency diversity configuration includes repetition of DCI on multiple PDCCH monitoring occasions of a search space, and at least two of the multiple PDCCH monitoring occasions are associated with different frequency resource allocations; and sending DCI on the multiple PDCCH monitoring occasions at least in part based on the frequency diversity configuration.

[0284] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: receiving a monitoring configuration, where the monitoring configuration includes repetitions of downlink control information (DCI) on multiple physical downlink control channel (PDCCH) monitoring occasions of a search space, where the monitoring configuration indicates multiple hash functions for identifying one or more control channel element (CCE) indices of a PDCCH candidate set of the search space, where a hash function among the multiple hash functions depends on at least one of the following: the 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; and monitoring DCI in the search space associated with the multiple PDCCH monitoring occasions at least partially based on the hash function.

[0285] In some aspects, a method of wireless communication performed by a base station includes: sending a monitoring configuration to a UE, where the monitoring configuration includes repetitions of DCI on multiple PDCCH monitoring occasions of a search space, where the monitoring configuration indicates multiple hash functions for identifying one or more CCE indices of a PDCCH candidate set of the search space, where a hash function among the multiple hash functions depends on at least one of the following: the 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; and sending DCI in the search space associated with the multiple PDCCH monitoring occasions at least partially based on the hash function.

[0286] In some aspects, a UE for wireless communication includes: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive a monitoring configuration, where the monitoring configuration includes repetitions of DCI on multiple PDCCH monitoring occasions of a search space, where the monitoring configuration indicates multiple hash functions for identifying one or more CCE indices of a PDCCH candidate set of the search space, where a hash function among the multiple hash functions depends on at least one of the following: the 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; and monitoring DCI in the search space associated with the multiple PDCCH monitoring occasions at least partially based on the hash function.

[0287] In some aspects, a base station for wireless communication includes: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: send a monitoring configuration to a UE, wherein the monitoring configuration includes repetitions of DCI on a plurality of PDCCH monitoring occasions of a search space, wherein the monitoring configuration indicates a plurality of hash functions for identifying a set of PDCCH candidates of the search space, wherein a hash function among the plurality of hash functions depends on at least one of: the position of the 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 send DCI in the search space associated with the plurality of PDCCH monitoring occasions at least partially based on the hash function.

[0288] In some aspects, a non-transitory computer-readable medium storing an instruction set 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, wherein the monitoring configuration includes repetitions of DCI on a plurality of PDCCH monitoring occasions of a search space, wherein the monitoring configuration indicates a plurality of hash functions for identifying a set of PDCCH candidates of the search space, wherein a hash function among the plurality of hash functions depends on at least one of: the position of the 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 DCI in the search space associated with the plurality of PDCCH monitoring occasions at least partially based on the hash function.

[0289] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes: one or more instructions that, when executed by one or more processors of a base station, cause the base station to: send a monitoring configuration to a UE, wherein the monitoring configuration includes repetitions of DCI on a plurality of PDCCH monitoring occasions of a search space, wherein the monitoring configuration indicates a plurality of hash functions for identifying a set of PDCCH candidates of the search space, wherein a hash function among the plurality of hash functions depends on at least one of: the position of the 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 send DCI in the search space associated with the plurality of PDCCH monitoring occasions at least partially based on the hash function.

[0290] In some aspects, an apparatus for wireless communication may include units for: receiving a monitoring configuration, where the monitoring configuration includes repetitions of DCI on multiple PDCCH monitoring occasions of a search space, where the monitoring configuration indicates multiple hash functions for identifying a set of PDCCH candidates of the search space, where a hash function among the multiple hash 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; and units for: monitoring DCI in the search space associated with the multiple PDCCH monitoring occasions, at least in part based on the hash function.

[0291] In some aspects, an apparatus for wireless communication may include units for: sending a monitoring configuration to a UE, where the monitoring configuration includes repetitions of DCI on multiple PDCCH monitoring occasions of a search space, where the monitoring configuration indicates multiple hash functions for identifying a set of PDCCH candidates of the search space, where a hash function among the multiple hash 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; and units for: sending DCI in the search space associated with the multiple PDCCH monitoring occasions, at least in part based on the hash function.

[0292] In some aspects, a method of wireless communication includes: receiving, by a user equipment (UE), a monitoring configuration that specifies a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among multiple monitoring occasions, the first CORESET and the second CORESET being different from each other. The method further includes: monitoring, by the UE, a search space including the multiple monitoring occasions for physical downlink control channel (PDCCH) transmissions, based on the monitoring configuration.

[0293] In some aspects, a method of wireless communication includes: sending, by a base station (BS), a monitoring configuration that specifies a first control resource set (CORESET) and a second CORESET corresponding to respective monitoring occasions from among multiple monitoring occasions, the first CORESET and the second CORESET being different from each other. The method further includes: indicating, by the BS, to the UE to start monitoring a search space including the multiple monitoring occasions for physical downlink control channel (PDCCH) transmissions, based on the monitoring configuration. The method further includes: sending, by the BS, PDCCH transmissions to the UE in at least one of the first CORESET and the second CORESET.

[0294] In some aspects, a first wireless communication device includes a transceiver configured to receive a monitoring configuration from 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 CORESET and the second CORESET being different from each other. The wireless communication device further includes a transceiver configured to receive a monitoring configuration from 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 CORESET and the second CORESET being different from each other.

[0295] In some aspects, a first wireless communication device includes a transceiver configured to send 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 CORESET and the second CORESET being different from each other. The transceiver is further configured to indicate to the second wireless communication device, based on the monitoring configuration, to start monitoring a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The transceiver is further configured to send PDCCH transmissions in at least one of the first CORESET and the second CORESET.

[0296] In some aspects, a non-transitory computer-readable medium having program code recorded thereon, the program code including code for causing a first wireless communication device to: receive a monitoring configuration from 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 CORESET and the second CORESET being different from each other. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to: monitor, based on the monitoring configuration, a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions.

[0297] In some aspects, a non-transitory computer-readable medium having program code recorded thereon, the program code including code for causing a first wireless communication device to: send 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 a plurality of monitoring occasions, the first CORESET and the second CORESET being different from each other. The non-transitory computer-readable medium further includes code for causing the first wireless communication device to: based on the monitoring configuration, indicate to the second wireless communication device to start 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: send PDCCH transmissions in at least one of the first CORESET and the second CORESET.

[0298] In some aspects, a first wireless communication device includes units for: receiving a monitoring configuration from 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 a plurality of monitoring occasions, the first CORESET and the second CORESET being different from each other. The first wireless communication device further includes units for: based on the monitoring configuration, monitoring a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions.

[0299] In some aspects, a first wireless communication device includes units for: sending 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 a plurality of monitoring occasions, the first CORESET and the second CORESET being different from each other. The first wireless communication device further includes units for: based on the monitoring configuration, indicating to the second wireless communication device to start monitoring a search space including a plurality of monitoring occasions for physical downlink control channel (PDCCH) transmissions. The first wireless communication device further includes units for: sending PDCCH transmissions to the second wireless communication device in at least one of the first CORESET and the second CORESET.

[0300] Additional aspects of the present disclosure include the following:

[0301] 1. A method of wireless communication, comprising:

[0302] Receiving, by a user equipment (UE), a monitoring configuration, where the monitoring configuration includes repetition of downlink control information (DCI) on a plurality of physical downlink control channel (PDCCH) monitoring occasions of a search space, and indicates a diversity parameter for introducing diversity between the plurality of PDCCH monitoring occasions; and

[0303] Based on the monitoring configuration, the UE monitors the DCI in the search space associated with the plurality of PDCCH monitoring occasions according to the diversity parameter.

[0304] 2. The method according to aspect 1, wherein the diversity parameter includes at least one of the following:

[0305] A difference in frequency resource allocation between the plurality of PDCCH monitoring occasions;

[0306] A difference in control resource set (CORESET) allocation between the plurality of PDCCH monitoring occasions; or

[0307] Different hash function allocations between the plurality of PDCCH monitoring occasions, each hash function being used to identify one or more control channel element (CCE) indexes of a PDCCH candidate set of the search space and depending on a value associated with a corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions.

[0308] 3. The method according to any one 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 frequency range and the second frequency range are different from each other.

[0309] 4. The method according to any one 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 REG bundling and the second REG bundling are different from each other.

[0310] 5. The method according to any one of aspects 1-4, wherein at least two PDCCH monitoring occasions among the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

[0311] 6. The method according to any one of aspects 1-5 further comprises: receiving an indication of a frequency offset associated with at least one PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions.

[0312] 7. The method according to any one of aspects 2-6, wherein the hash function depends on at least one of the following:

[0313] the position of the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, or

[0314] an index associated with the corresponding PDCCH monitoring occasion.

[0315] 8. The method according to any one of aspects 2-7, wherein the hash function depends on the position of the corresponding PDCCH monitoring occasion within a time slot.

[0316] 9. A method of wireless communication, comprising:

[0317] transmitting, by a base station (BS), a monitoring configuration, wherein the monitoring configuration includes a repetition of downlink control information (DCI) on a plurality of physical downlink control channel (PDCCH) monitoring occasions of a search space, and indicates a diversity parameter for introducing diversity among the plurality of PDCCH monitoring occasions; and

[0318] transmitting, by the BS, the DCI in the search space associated with the plurality of PDCCH monitoring occasions based on the monitoring configuration according to the diversity parameter.

[0319] 10. The method according to aspect 9, wherein the diversity parameter includes at least one of the following:

[0320] a difference in frequency resource allocation among the plurality of PDCCH monitoring occasions;

[0321] a difference in control resource set (CORESET) allocation among the plurality of PDCCH monitoring occasions; or

[0322] a different hash function allocation among the plurality of PDCCH monitoring occasions, each hash function being used to identify one or more control channel element (CCE) indices of a PDCCH candidate set of the search space and depending on a value associated with the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions.

[0323] 11. The method according to any one 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 frequency range and the second frequency range are different from each other.

[0324] 12. The method according to any one 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) bundle, and a second CORESET for a second PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions is associated with a second REG bundle, and the first REG bundle and the second REG bundle are different from each other.

[0325] 13. The method according to any one of aspects 9 - 12, wherein at least two PDCCH monitoring occasions among the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

[0326] 14. The method according to any one of aspects 9 - 13, further comprising: sending an indication of a frequency offset associated with at least one PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions.

[0327] 15. The method according to any one of aspects 10 - 14, wherein the hash function depends on at least one of the following:

[0328] the position of the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, or

[0329] an index associated with the corresponding PDCCH monitoring occasion.

[0330] 16. The method according to any one of aspects 10 - 15, wherein the hash function depends on the position of the corresponding PDCCH monitoring occasion within a time slot.

[0331] 17. A user equipment (UE) comprising:

[0332] a transceiver configured to: receive a monitoring configuration, wherein the monitoring configuration includes repetitions of downlink control information (DCI) on a plurality of physical downlink control channel (PDCCH) monitoring occasions of a search space, and indicates a diversity parameter for introducing diversity between the plurality of PDCCH monitoring occasions; and

[0333] A processor configured to monitor the DCI in the search space associated with the plurality of PDCCH monitoring occasions according to the diversity parameter based on the monitoring configuration.

[0334] 18. The UE according to aspect 17, wherein the diversity parameter includes at least one of the following:

[0335] A frequency resource allocation difference between the plurality of PDCCH monitoring occasions;

[0336] A control resource set (CORESET) allocation difference between the plurality of PDCCH monitoring occasions; or

[0337] A different hash function allocation between the plurality of PDCCH monitoring occasions, each hash function being used to identify one or more control channel element (CCE) indices of a PDCCH candidate set of the search space and depending on a value associated with the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions.

[0338] 19. The UE according to any one 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 frequency range and the second frequency range are different from each other.

[0339] 20. The UE according to any one 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 REG bundling and the second REG bundling are different from each other.

[0340] 21. The UE according to any one of aspects 17 - 20, wherein at least two of the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

[0341] 22. The UE according to any one 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 among the plurality of PDCCH monitoring occasions.

[0342] 23. The UE according to any one of aspects 18 - 22, wherein the hash function depends on at least one of the following:

[0343] the position of the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, or

[0344] an index associated with the corresponding PDCCH monitoring occasion.

[0345] 24. A base station (BS) comprising:

[0346] a transceiver configured to:

[0347] transmit a monitoring configuration, wherein the monitoring configuration includes repetition of downlink control information (DCI) on a plurality of physical downlink control channel (PDCCH) monitoring occasions of a search space, and indicates a diversity parameter for introducing diversity between the plurality of PDCCH monitoring occasions; and

[0348] transmit the DCI in the search space associated with the plurality of PDCCH monitoring occasions according to the diversity parameter based on the monitoring configuration.

[0349] 25. The BS according to aspect 24, wherein the diversity parameter includes at least one of the following:

[0350] a difference in frequency resource allocation between the plurality of PDCCH monitoring occasions;

[0351] a difference in control resource set (CORESET) allocation between the plurality of PDCCH monitoring occasions; or

[0352] different hash function allocations between the plurality of PDCCH monitoring occasions, each hash function being used to identify one or more control channel element (CCE) indices of a PDCCH candidate set of the search space and depending on a value associated with the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions.

[0353] 26. The BS according to any one 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 frequency range and the second frequency range are different from each other.

[0354] 27. The BS according to any one 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 REG bundling and the second REG bundling are different from each other.

[0355] 28. The BS according to any one of aspects 24 - 27, wherein at least two PDCCH monitoring occasions among the plurality of PDCCH monitoring occasions are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

[0356] 29. The BS according to any one of aspects 24 - 28, wherein the transceiver is further configured to: send an indication of a frequency offset associated with at least one PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions.

[0357] 30. The BS according to any one of aspects 25 - 29, wherein the hash function depends on at least one of the following:

[0358] the position of the corresponding PDCCH monitoring occasion among the plurality of PDCCH monitoring occasions, or

[0359] the index associated with the corresponding PDCCH monitoring occasion.

[0360] Information and signals can be represented using any one of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0361] The various illustrative blocks and modules described in connection with the disclosure herein can be implemented or executed 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. The general - purpose processor can be a microprocessor, but in an alternative manner, the processor can be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, the combination of one or more microprocessors and a DSP core, or any other such configuration).

[0362] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can 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 the present disclosure and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these items. The features implementing the functions can also be physically located at various positions, including being distributed such that portions of the functions are implemented at different physical locations. Further, as used herein (including in the claims), the "or" as used in a list of items (e.g., a list that ends with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such that 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).

[0363] As will be apparent to those skilled in the art so far, and depending on the particular application at hand, many modifications, substitutions, and changes can be made in the materials, apparatus, configurations, and methods of use of the devices of the present disclosure without departing from the spirit and scope of the present disclosure. In view of this, the scope of the present disclosure should not be limited to the scope of the specific embodiments shown and described herein (since they are only by way of some examples), but should be commensurate in full with the appended claims and their functional equivalents hereinafter.

Claims

1. A method for wireless communication, comprising: receiving, by a user equipment (UE), a monitoring configuration for at least a specified first control resource set (CORESET) and a second CORESET different from the first CORESET, wherein the first CORESET corresponds to a first physical downlink control channel (PDCCH) monitoring occasion and the second CORESET corresponds to a second PDCCH monitoring occasion different from the first PDCCH monitoring occasion, the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are within the same search space, and wherein the first CORESET is associated with a first transmission control information (TCI) state and the second CORESET is associated with a second TCI state different from the first TCI state; and monitoring, by the UE, downlink control information (DCI) in the same search space associated with the first PDCCH monitoring occasion and the second PDCCH monitoring occasion based on the monitoring configuration.

2. The method according to claim 1, wherein, the monitoring configuration further includes diversity parameters, and the diversity parameters include at least one of the following: a frequency resource allocation difference between the first PDCCH monitoring occasion and the second PDCCH monitoring occasion; or different hash function allocations between the first PDCCH monitoring occasion and the second PDCCH monitoring occasion, each hash function being used to identify one or more control channel element (CCE) indexes of a PDCCH candidate set of the same search space and depending on a value associated with a corresponding PDCCH monitoring occasion among the first PDCCH monitoring occasion and the second PDCCH monitoring occasion.

3. The method according to claim 2, wherein, the first CORESET corresponding to the first PDCCH monitoring occasion is associated with a first frequency range, and the second CORESET corresponding to the second PDCCH monitoring occasion is associated with a second frequency range, and the first frequency range and the second frequency range are different from each other.

4. The method according to claim 2, wherein, the first CORESET corresponding to the first PDCCH monitoring occasion is associated with a first resource element group (REG) bundling, and the second CORESET corresponding to the second PDCCH monitoring occasion is associated with a second REG bundling, and the first REG bundling and the second REG bundling are different from each other.

5. The method according to claim 2, wherein, at least the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

6. The method according to claim 2, further comprising: receiving an indication of a frequency offset associated with at least one PDCCH monitoring occasion within the same search space.

7. The method according to claim 2, wherein, The hash function depends on at least one of the following: the position of the corresponding PDCCH monitoring occasion within a time slot, or an index associated with the corresponding PDCCH monitoring occasion.

8. A method for wireless communication, comprising: sending, by a network entity, a monitoring configuration for at least a specified first control resource set (CORESET) and a second CORESET different from the first CORESET, wherein the first CORESET corresponds to a first physical downlink control channel (PDCCH) monitoring occasion and the second CORESET corresponds to a second PDCCH monitoring occasion different from the first PDCCH monitoring occasion, the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are within the same search space, and wherein the first CORESET is associated with a first transmission control information (TCI) state and the second CORESET is associated with a second TCI state different from the first TCI state; and sending, by the network entity, downlink control information (DCI) in the same search space associated with the first PDCCH monitoring occasion and the second PDCCH monitoring occasion based on the monitoring configuration.

9. The method according to claim 8, wherein, the monitoring configuration further includes diversity parameters, the diversity parameters including at least one of the following: a frequency resource allocation difference between the first PDCCH monitoring occasion and the second PDCCH monitoring occasion; or a different hash function allocation between the first PDCCH monitoring occasion and the second PDCCH monitoring occasion, each hash function being used to identify one or more control channel element (CCE) indexes of a PDCCH candidate set of the same search space and depending on a value associated with a corresponding PDCCH monitoring occasion from among the first PDCCH monitoring occasion and the second PDCCH monitoring occasion.

10. The method according to claim 9, wherein, the first CORESET corresponding to the first PDCCH monitoring occasion is associated with a first frequency range, and the second CORESET corresponding to the second PDCCH monitoring occasion is associated with a second frequency range, the first frequency range and the second frequency range being different from each other.

11. The method according to claim 9, wherein, the first CORESET corresponding to the first PDCCH monitoring occasion is associated with a first resource element group (REG) bundling, and the second CORESET corresponding to the second PDCCH monitoring occasion is associated with a second REG bundling, the first REG bundling and the second REG bundling being different from each other.

12. The method according to claim 9, wherein, at least the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

13. The method according to claim 9, further Comprising: Sending an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the same search space.

14. The method according to claim 9, wherein, The hash function depends on at least one of the following: The position of the corresponding PDCCH monitoring occasion within a time slot, or The index associated with the corresponding PDCCH monitoring occasion.

15. A user equipment (UE), Comprising: A transceiver configured to: receive monitoring configurations for at least a specified first control resource set (CORESET) and a second CORESET different from the first CORESET, wherein the first CORESET corresponds to a first physical downlink control channel (PDCCH) monitoring occasion and the second CORESET corresponds to a second PDCCH monitoring occasion different from the first PDCCH monitoring occasion, the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are within the same search space, and wherein the first CORESET is associated with a first transmission control information (TCI) state and the second CORESET is associated with a second TCI state different from the first TCI state; and A processor configured to: monitor downlink control information (DCI) in the same search space associated with the first PDCCH monitoring occasion and the second PDCCH monitoring occasion based on the monitoring configurations.

16. The UE according to claim 15, wherein, The monitoring configuration further includes diversity parameters, the diversity parameters including at least one of the following: The frequency resource allocation difference between the first PDCCH monitoring occasion and the second PDCCH monitoring occasion; or The different hash function allocations between the first PDCCH monitoring occasion and the second PDCCH monitoring occasion, each hash function for identifying one or more control channel element (CCE) indices of a PDCCH candidate set of the same search space and depending on a value associated with the corresponding PDCCH monitoring occasion among the first PDCCH monitoring occasion and the second PDCCH monitoring occasion.

17. The UE according to claim 16, wherein, The first CORESET corresponding to the first PDCCH monitoring occasion is associated with a first frequency range, and the second CORESET corresponding to the second PDCCH monitoring occasion is associated with a second frequency range, the first frequency range and the second frequency range are different from each other.

18. The UE according to claim 16, wherein, The first CORESET corresponding to the first PDCCH monitoring occasion is associated with a first resource element group (REG) bundling, and the second CORESET corresponding to the second PDCCH monitoring occasion is associated with a second REG bundling, the first REG bundling and the second REG bundling are different from each other.

19. The UE according to claim 16, wherein, At least the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are at least partially associated with different frequency resource allocations based on a PDCCH monitoring aggregation process.

20. The UE according to claim 16, wherein, the transceiver is further configured to: receive an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the same search space.

21. The UE according to claim 16, wherein, the hash function depends on at least one of the following: the position of the corresponding PDCCH monitoring occasion within a time slot, or the index associated with the corresponding PDCCH monitoring occasion.

22. A network entity, comprising: a transceiver configured to: send monitoring configurations for at least a specified first control resource set (CORESET) and a second CORESET different from the first CORESET, wherein the first CORESET corresponds to a first physical downlink control channel (PDCCH) monitoring occasion and the second CORESET corresponds to a second PDCCH monitoring occasion different from the first PDCCH monitoring occasion, the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are within the same search space, and wherein the first CORESET is associated with a first transmission control information (TCI) state and the second CORESET is associated with a second TCI state different from the first TCI state; and send downlink control information (DCI) in the same search space associated with the first PDCCH monitoring occasion and the second PDCCH monitoring occasion based on the monitoring configuration.

23. The network entity according to claim 22, wherein, the monitoring configuration further includes diversity parameters, the diversity parameters including at least one of the following: a frequency resource allocation difference between the first PDCCH monitoring occasion and the second PDCCH monitoring occasion; or a different hash function allocation between the first PDCCH monitoring occasion and the second PDCCH monitoring occasion, each hash function being used to identify one or more control channel element (CCE) indices of a PDCCH candidate set of the same search space and depending on a value associated with the corresponding PDCCH monitoring occasion among the first PDCCH monitoring occasion and the second PDCCH monitoring occasion.

24. The network entity according to claim 23, wherein, the first CORESET corresponding to the first PDCCH monitoring occasion is associated with a first frequency range, and the second CORESET corresponding to the second PDCCH monitoring occasion is associated with a second frequency range, the first frequency range and the second frequency range being different from each other.

25. The network entity according to claim 23, wherein, The first CORESET corresponding to the first PDCCH monitoring occasion is associated with a first resource element group (REG) bundling, and the second CORESET corresponding to the second PDCCH monitoring occasion is associated with a second REG bundling, and the first REG bundling and the second REG bundling are different from each other.

26. The network entity according to claim 23, wherein, at least the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are associated with different frequency resource allocations at least partially based on a PDCCH monitoring aggregation process.

27. The network entity according to claim 23, wherein, the transceiver is further configured to: send an indication of a frequency offset associated with at least one PDCCH monitoring occasion of the same search space.

28. The network entity according to claim 23, wherein, the hash function depends on at least one of the following: the position of the corresponding PDCCH monitoring occasion within a time slot, or the index associated with the corresponding PDCCH monitoring occasion.

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