TCI and QCL determination for dynamic CORESET

Abstract

Aspects of the present disclosure relate to wireless communications, and more particularly to techniques for determining quasi co-location (QCL) and / or transmission configuration information (TCI) state assumption information for a dynamic control resource set (CORESET). An example method performed by a user equipment (UE) includes receiving a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and receiving a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one QCL assumption for the at least one dynamic CORESET.

Description

[0001] Priority claim

[0002] This application claims priority to U.S. Application No. 17 / 225,843, filed on April 8, 2021, which claims priority to and the benefit of U.S. Provisional Application No. 63 / 008,122, filed on April 10, 2020, both of which are expressly incorporated herein by reference as if fully set forth below and for all applicable purposes.

[0003] introduction

[0004] Aspects of the present disclosure relate to wireless communications and, more particularly, to techniques for determining a quasi co-location (QCL) assumption for a control resource set (CORESET).

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

[0006] In some examples, a wireless multiple access communication system may include several base stations (BS), each of which is capable of simultaneously supporting communication of multiple communication devices (also referred to as user equipment (UE)). In an LTE or LTE-A network, a set of one or more base stations may define an evolved B node (eNB). In other examples (e.g., in a next generation, new radio (NR), or 5G network), a wireless multiple access communication system may include several distributed units (DU) (e.g., edge units (EU), edge nodes (EN), radio heads (RH), smart radio heads (SRH), transmission reception points (TRP), etc.) in communication with several central units (CU) (e.g., central nodes (CN), access node controllers (ANC), etc.), wherein a set of one or more distributed units in communication with a central unit may define an access node (e.g., which may be referred to as a base station, a 5G NB, a next generation B node (gNB or g B node), a TRP, etc.). A base station or distributed unit may communicate with a set of UEs on downlink channels (eg, for transmissions from or to the base station) and uplink channels (eg, for transmissions from the UE to the base station or distributed unit).

[0007] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. New Radio (NR) (e.g., 5G) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard promulgated by 3GPP. It is designed to better support mobile broadband Internet access by using OFDMA with cyclic prefix (CP) on downlink (DL) and uplink (UL) to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0008] However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies.

[0009] Brief Overview

[0010] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed in the appended claims, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide advantages including improved communication between access points and stations in a wireless network.

[0011] Certain aspects of the present disclosure provide a method for wireless communication by a user equipment (UE). The method generally includes: detecting a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); determining at least one quasi co-location (QCL) assumption for the dynamic CORESET; and monitoring the at least one CORESET based on the determined QCL assumption to find at least a second PDCCH. Receive a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); and receive a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one quasi co-location (QCL) assumption for the at least one dynamic CORESET.

[0012] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a UE. The apparatus generally includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to: receive a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and receive a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one QCL hypothesis for the at least one dynamic CORESET.

[0013] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a UE. The apparatus generally includes: a device for receiving a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and a device for receiving a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one QCL hypothesis for the at least one dynamic CORESET.

[0014] Certain aspects of the present disclosure relate to a computer-readable medium having stored thereon instructions for performing the following operations: receiving a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and receiving a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one QCL assumption for the at least one dynamic CORESET.

[0015] Certain aspects of the present disclosure provide a method for wireless communication by a network entity. The method generally includes: sending a first physical downlink control channel (PDCCH) to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; determining at least one quasi-co-location (QCL) assumption for the at least one dynamic control resource set; and sending at least a second PDCCH to the UE on the at least one dynamic control channel resource set based on the determined QCL assumption. Sending a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and sending at least a second PDCCH to the UE on the at least one dynamic CORESET based on at least one QCL assumption determined for the at least one dynamic CORESET.

[0016] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a network entity. The apparatus generally includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to: send a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and send at least a second PDCCH to the UE on the at least one dynamic CORESET based on at least one QCL hypothesis determined for the at least one dynamic CORESET.

[0017] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a network entity. The apparatus generally includes: a device for sending a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and a device for sending at least a second PDCCH to the UE on the at least one dynamic CORESET based on at least one QCL hypothesis determined for the at least one dynamic CORESET.

[0018] Certain aspects of the present disclosure relate to a computer-readable medium having stored thereon instructions for performing the following operations: sending a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and sending at least a second PDCCH to the UE on the at least one dynamic CORESET based on at least one QCL assumption determined for the at least one dynamic CORESET.

[0019] Certain aspects of the present disclosure provide a method for wireless communication by a UE. The method generally includes: detecting a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; determining at least one QCL hypothesis for the dynamic CORESET; and monitoring the at least one CORESET to find at least a second PDCCH based on the determined QCL hypothesis.

[0020] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a UE. The apparatus generally includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to: detect a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; determine at least one QCL hypothesis for the dynamic CORESET; and monitor the at least one CORESET for at least a second PDCCH based on the determined QCL hypothesis.

[0021] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a UE. The apparatus generally includes: means for detecting a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; means for determining at least one QCL hypothesis for the dynamic CORESET; and means for monitoring the at least one CORESET to find at least a second PDCCH based on the determined QCL hypothesis.

[0022] Certain aspects of the present disclosure relate to a computer-readable medium having stored thereon instructions for performing the following operations: detecting a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; determining at least one QCL hypothesis for the dynamic CORESET; and monitoring the at least one CORESET for at least a second PDCCH based on the determined QCL hypothesis.

[0023] Certain aspects of the present disclosure provide a method for wireless communication by a network entity. The method generally includes: sending a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; determining at least one QCL hypothesis for the at least one dynamic control resource set; and sending at least a second PDCCH to the UE on the at least one dynamic control channel resource set according to the determined QCL hypothesis.

[0024] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a network entity. The apparatus generally includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to: send a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; determine at least one QCL hypothesis for the at least one dynamic control resource set; and send at least a second PDCCH to the UE on the at least one dynamic control channel resource set according to the determined QCL hypothesis.

[0025] Certain aspects of the present disclosure relate to an apparatus for wireless communication by a network entity. The apparatus generally includes: a device for sending a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; a device for determining at least one QCL hypothesis for the at least one dynamic control resource set; and a device for sending at least a second PDCCH to the UE on the at least one dynamic control channel resource set according to the determined QCL hypothesis.

[0026] Certain aspects of the present disclosure relate to a computer-readable medium having stored thereon instructions for performing the following operations: transmitting a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; determining at least one QCL hypothesis for the at least one dynamic control resource set; and transmitting at least a second PDCCH to the UE on the at least one dynamic control channel resource set according to the determined QCL hypothesis. .

[0027] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are only indicative of several of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to understand in detail the manner in which the above-stated features of the present disclosure are used, a more particular description of the content briefly summarized above may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the present disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0030] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0031] Figure 2 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0032] Figure 3 An example of a frame format for a New Radio (NR) system is illustrated in accordance with certain aspects of the present disclosure.

[0033] Figure 4 Illustrated how different synchronization signal blocks (SSBs) may be sent using different beams in accordance with certain aspects of the present disclosure.

[0034] Figure 5 Exemplary transmission resource mappings according to aspects of the present disclosure are shown.

[0035] Figure 6 An example quasi-co-location (QCL) relationship is illustrated in accordance with certain aspects of the present disclosure.

[0036] Figure 7 An example timing diagram for dynamic control resource signaling is illustrated in accordance with some aspects of the present disclosure.

[0037] Figure 8

[0013] Example operations for wireless communications by a UE are illustrated in accordance with certain aspects of the present disclosure.

[0038] Fig. 9

[0013] Example operations for wireless communications by a network entity are illustrated in accordance with certain aspects of the present disclosure.

[0039] Figure 10-11 An example timing diagram for dynamic control resource signaling is illustrated in accordance with some aspects of the present disclosure.

[0040] Figure 12-13 An example communications device that may include various components configured to perform operations of the techniques disclosed herein in accordance with aspects of the present disclosure is illustrated.

[0041] Fig.14

[0013] Example operations for wireless communications by a UE are illustrated in accordance with certain aspects of the present disclosure.

[0042] Fig.15

[0013] Example operations for wireless communications by a network entity are illustrated in accordance with certain aspects of the present disclosure.

[0043] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation.

[0044] Detailed Description

[0045] Aspects of the present disclosure provide apparatus (devices), devices, methods, processing systems, and computer-readable media for determining a quasi co-location (QCL) assumption for a control resource set (CORESET).

[0046] For example, a UE that can be configured with a transmission configuration indicator (TCI) state can be configured for a dynamic CORESET. In some cases, the downlink control information (DCI) that schedules the dynamic CORESET can (dynamically) indicate one of the TCI states. The UE can then monitor the dynamic CORESET for a physical downlink control channel (PDCCH) based on the indicated TCI state.

[0047] The following description provides examples rather than limiting the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various examples may appropriately omit, replace, or add various procedures or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Moreover, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functionality, or structures and functionality as supplements to the various aspects of the present disclosure set forth herein or in addition. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of the claims. The wording "exemplary" is used herein to mean "used as an example, instance, or explanation". Any aspect described as "exemplary" herein is not necessarily to be interpreted as being superior to or superior to other aspects.

[0048] The techniques described herein can be used for various wireless communication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes other variants of Wideband CDMA (WCDMA) and CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS).

[0049] New Radio (NR) is an emerging wireless communication technology being developed in collaboration with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and Advanced LTE (LTE-A) are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization called "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, although various aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, such as 5G and later generations, including NR technologies.

[0050] New Radio (NR) access (e.g., 5G technology) can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or higher), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or higher), massive machine type communication MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical services targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0051] Example Wireless Communication System

[0052] Figure 1 An example wireless communication network 100 (e.g., an NR / 5G network) is illustrated in which aspects of the present disclosure may be performed. For example, the wireless network 100 may include a UE 120 configured with a dynamic CORESET manager 140 to perform Figure 8 The operation 800 of determining a quasi co-location (QCL) assumption for a dynamic control resource set (CORESET). Similarly, the wireless network 100 may include a base station 110 configured with a dynamic CORESET manager 141 to perform Fig. 9 Operation 900 determines the QCL assumptions for the dynamic CORESET.

[0053] like Figure 1As illustrated in , the wireless network 100 may include several base stations (BS) 110 and other network entities. A BS may be a station that communicates with a user equipment (UE). Each BS 110 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a B node and / or a B node subsystem that serves the coverage area, depending on the context in which the term is used. In the NR system, the term "cell" and the next generation B node (gNB), new radio base station (NRBS), 5G NB, access point (AP), or transmission reception point (TRP) may be interchangeable. In some examples, the cell may not necessarily be stationary, and the geographical area of ​​the cell may move according to the location of the mobile BS. In some examples, the base station may be interconnected to each other and / or to one or more other base stations or network nodes (not shown) in the wireless communication network 100 using any suitable transmission network through various types of backhaul interfaces (such as direct physical connections, wireless connections, virtual networks, etc.).

[0054] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, subcarrier, frequency channel, frequency modulation, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0055] A base station (BS) may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a residence, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1In the example shown in FIG. 1 , BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more (e.g., three) cells.

[0056] The wireless communication network 100 may also include a relay station. A relay station is a station that receives transmissions of data and / or other information from an upstream station (e.g., a BS or a UE) and sends transmissions of the data and / or other information to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that relays transmissions for other UEs. Figure 1 In the example shown in , a relay station 110r may communicate with a BS 110a and a UE 120r to facilitate communication between the BS 110a and the UE 120r. A relay station may also be referred to as a relay BS, a relay, or the like.

[0057] The wireless network 100 may be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, relays, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 20 watts), while a pico BS, a femto BS, and a relay may have a lower transmit power level (e.g., 1 watt).

[0058] The wireless communication network 100 may support synchronous or asynchronous operation. For synchronous operation, each BS may have similar frame timing, and transmissions from different BSs may be roughly aligned in time. For asynchronous operation, each BS may have different frame timing, and transmissions from different BSs may not be aligned in time. The techniques described herein may be used for both synchronous and asynchronous operation.

[0059] A network controller 130 may couple to a set of BSs and provide coordination and control for the BSs. The network controller 130 may communicate with the BSs 110 via a backhaul. The BSs 110 may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0060] BS 110 communicates with UEs 120a-y (each also individually referred to herein as UE 120, or collectively referred to as UE 120) in the wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. In one example, a quadcopter, a drone, or any other unmanned aerial vehicle (UAV) or a remotely piloted aerial system (RPAS) 120d may be configured to serve as a UE. The wireless communication network 100 may also include a relay station (e.g., relay station 110r) (also referred to as a relay, etc.), which receives a transmission of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and sends the transmission of the data and / or other information to a downstream station (e.g., UE 120 or BS 110), or the relay station relays transmissions between UEs 120 to facilitate communication between the devices.

[0061] A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a customer premises equipment (CPE), a cellular phone, a smart phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor / device, a wearable device (such as a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet, etc.)), an entertainment device (e.g., a music device, a video device, a satellite radio, etc.), a transportation component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, a gaming device, an augmented reality device (augmented reality (AR), extended reality (XR), or virtual reality (VR)), or any other suitable device configured to communicate via a wireless or wired medium.

[0062] Some UEs may be considered as machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity for or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0063] Some wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also often referred to as frequency modulation, frequency bins, etc. Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain for OFDM and in the time domain for SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the spacing of subcarriers can be 15kHz, and the minimum resource allocation (called a "resource block" (RB)) can be 12 subcarriers (or 180kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal fast Fourier transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (ie, 6 resource blocks), and there may be 1, 2, 4, 8, or 16 subbands for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, respectively.

[0064] Although aspects of the examples described herein may be associated with LTE technology, aspects of the present disclosure may be applicable to other wireless communication systems, such as NR. NR may utilize OFDM with CP on the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported and the beam direction may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas (with multi-layer DL transmissions of up to 8 streams) and up to 2 streams per UE. Multi-layer transmissions of up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported using up to 8 serving cells.

[0065] In some scenarios, air interface access may be scheduled. For example, a scheduling entity (e.g., a base station (BS), a Node B, an eNB, a gNB, etc.) may allocate resources for communication among some or all devices and equipment within its service area or cell. A scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, subordinate entities may utilize resources allocated by one or more scheduling entities.

[0066] A base station is not the only entity that can be used as a scheduling entity. In some examples, a UE can act as a scheduling entity and can schedule resources for one or more subordinate entities (e.g., one or more other UEs), and the other UEs can use the resources scheduled by the UE for wireless communication. In some examples, a UE can act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In the mesh network example, UEs can communicate directly with each other in addition to communicating with the scheduling entity.

[0067] Return to Figure 1 , which illustrates various potential deployments for various deployment scenarios. For example, in Figure 1 , a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on a downlink and / or uplink. A thin dashed line with double arrows indicates interfering transmissions between the UE and the BS. Other lines illustrate component-to-component (e.g., UE-to-UE) communication options.

[0068] Figure 2 Explained (such as Figure 1 1 and 120, which may be used to implement aspects of the present disclosure. For example, antenna 252, processors 266, 258, 264, and / or controller / processor 280 of UE 120 may be used to perform Fig.11 Operations 1100 of the BS 110 (eg, to implement the dynamic CORESET module 140), and the antenna 234, the processors 220, 260, 238, and / or the controller / processor 240 of the BS 110 may be used to perform Fig.12 Operation 1200.

[0069] At BS 110, transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC-PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. The processor 220 may process (e.g., encode and symbol map) the data and the control information to obtain data symbols and control symbols, respectively. The processor 220 may also generate reference symbols (e.g., of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal (CRS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide an output symbol stream to modulators (MODs) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a to 232t may be transmitted via antennas 234a to 234t, respectively.

[0070] At the UE 120, antennas 252a to 252r may receive downlink signals from the base station 110 and may provide received signals to demodulators (DEMODs) 254a to 254r in the transceiver, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information to a controller / processor 280.

[0071] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from a data source 262 (e.g., data for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., control information for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for a reference signal (e.g., a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by a demodulator 254a to 254r in a transceiver (e.g., for SC-FDM, etc.), and transmitted to the base station 110. At the BS 110, the uplink signal from the UE 120 may be received by the antenna 234, processed by the modulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. Receive processor 238 may provide decoded data to data sink 239 and decoded control information to controller / processor 240 .

[0072] Controllers / processors 240 and 280 may direct the operation at base station 110 and UE 120, respectively. Processor 240 and / or other processors and modules at BS 110 may perform or direct the execution of processes for the techniques described herein. Memories 242 and 282 may store data and program codes for BS 110 and UE 120, respectively. Scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0073] The embodiments discussed herein may include various spacing and timing arrangements. For example, in LTE, the basic transmission time interval (TTI) or packet duration is a 1ms subframe. In NR, a subframe is still 1ms, but the basic TTI is called a time slot. A subframe contains a variable number of time slots (e.g., 1, 2, 4, 8, 16 time slots), depending on the subcarrier spacing. NR RBs are 12 consecutive frequency subcarriers. NR can support a base subcarrier spacing of 15KHz, and other subcarrier spacings can be defined relative to the base subcarrier spacing, for example, 30kHz, 60kHz, 120kHz, 240kHz, etc. The symbol and time slot lengths scale with the subcarrier spacing. The CP length also depends on the subcarrier spacing.

[0074] Figure 3300 for NR. The transmission timeline for each of the downlink and uplink may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 ms) and may be divided into 10 subframes with indices 0 to 9, each subframe being 1 ms. Each subframe may include a variable number of slots, depending on the subcarrier spacing. Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols), depending on the subcarrier spacing. An index may be assigned to the symbol period in each slot. A mini slot is a subslot structure (e.g., 2, 3, or 4 symbols).

[0075] Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction for each subframe may be switched dynamically. The link direction may be based on the slot format. Each slot may include DL / UL data and DL / UL control information.

[0076] In NR, a synchronization signal (SS) block (SSB) is transmitted. The SS block includes PSS, SSS, and two-symbol PBCH. The SS block can be in a fixed time slot position (such as Figure 3 PBCH is transmitted in the symbols 0-3 shown in . PSS and SSS can be used by UE for cell search and acquisition. PSS can provide half-frame timing, while SS can provide CP length and frame timing. PSS and SSS can provide cell identity. PBCH carries some basic system information, such as downlink system bandwidth, timing information within radio frames, SS burst set periodicity, system frame number, etc.

[0077] Further system information, such as Remaining Minimum System Information (RMSI), System Information Block (SIB), Other System Information (OSI), may be transmitted on the Physical Downlink Shared Channel (PDSCH) in certain subframes.

[0078] like Figure 4 As shown in , SS blocks (SSBs) 404 can be organized into SS burst sets 402 to support beam sweeping. As shown, each SSB 404 within a burst set 402 of L SSBs can be transmitted using a different beam 406 (e.g., beams B0-BL), which can help the UE quickly acquire both transmit (Tx) and receive (Rx) beams (especially for mmW applications). The physical cell identity (PCI) can still be decoded from the PSS and SSS of the SSB 404.

[0079] Certain deployment scenarios may include one or two NR deployment options. An option may be configured for non-standalone (NSA) and / or standalone (SA) options. Standalone cells may need to broadcast both SSBs and remaining minimum system information (RMSI), for example, using SIB1 and SIB2. Non-standalone cells may only need to broadcast SSBs without broadcasting RMSI. In a single carrier in NR, multiple SSBs may be sent at different frequencies and may include different types of SSBs.

[0080] Control Resource Set (CORESET)

[0081] A control resource set (CORESET) for an orthogonal frequency division multiple access (OFDMA) system (e.g., a communication system that uses an OFDMA waveform to transmit a physical downlink control channel (PDCCH)) may include one or more sets of control resources (e.g., time and frequency resources) configured within the system bandwidth for communicating the PDCCH. Within each CORESET, one or more search spaces (e.g., a common search space (CSS), a UE-specific search space (USS), etc.) may be defined for a given UE. A search space is generally an area or portion of a CORESET where a communication device (e.g., a UE) can search for control information.

[0082] According to various aspects of the present disclosure, a CORESET is a time-frequency domain resource set defined in units of resource element (RE) groups (REGs). Each REG may include a fixed number (e.g., twelve) frequency tones in one symbol period (e.g., a symbol period of a time slot), wherein one frequency tone in one symbol period is referred to as a resource element (RE). A fixed number of REGs may be included in a control channel element (CCE). A CCE set may be used for a PDCCH (e.g., a new radio (NR) PDCCH), where different numbers of CCEs in a set are used to transmit NR-PDCCH using different aggregation levels. Multiple CCE sets may be defined as search spaces for UEs, and thereby a Node B or other base station may transmit the NR-PDCCH to the UE by transmitting the NR-PDCCH in a CCE set of decoding candidates defined within the search space for the UE, and the UE may receive the NR-PDCCH by searching in the search space for the UE and decoding the NR-PDCCH transmitted by the Node B.

[0083] The operating characteristics of a Node B or other base station in a communication system (e.g., an NR communication system) may depend on the frequency range (FR) in which the system operates. The frequency range may include one or more operating bands (e.g., an "n1" band, an "n2" band, an "n7" band, and an "n41" band), and the communication system (e.g., one or more Node Bs and a UE) may operate in one or more operating bands. The frequency range and operating bands are described in more detail in "Base station (BS) radio transmission and reception" TS 38.104 (Release 15), which is available from the 3GPP website.

[0084] As described above, a CORESET is a collection of time domain and frequency domain resources. A CORESET can be configured to communicate a PDCCH within the system bandwidth. The UE can determine the CORESET and monitor the CORESET to find a control channel. During initial access, the UE can identify the initial CORESET (CORESET#0) configuration from a field (e.g., pdcchConfigSIB1) in a master information block (MIB). The initial CORESET can then be used to configure the UE (e.g., via dedicated (UE-specific) signaling with other CORESETs and / or bandwidth portions). When the UE detects a control channel in a CORESET, the UE attempts to decode the control channel, and the UE communicates with the transmitting BS (e.g., transmitting cell) based on the control data provided in the control channel (e.g., transmitted via the CORESET).

[0085] According to various aspects of the present disclosure, when a UE is connected to a cell (or BS), the UE may receive a master information block (MIB). The MIB may be in a synchronization signal and physical broadcast channel (SS / PBCH) block on a sync raster (e.g., in a PBCH of a SS / PBCH block). In some scenarios, the sync raster may correspond to an SSB. Based on the frequency of the sync raster, the UE may determine an operating frequency band of the cell. Based on the operating frequency band of the cell, the UE may determine a minimum channel bandwidth and a subcarrier spacing (SCS) of the channel. The UE may then determine an index based on the MIB (e.g., four bits in the MIB conveying an index in the range 0-15).

[0086] Given this index, the UE can look up or locate the CORESET configuration (this initial CORESET configured via the MIB is generally referred to as CORESET#0). This can be done according to one or more tables of CORESET configurations. These configurations (including single table scenarios) may include various subsets of indices indicating valid CORESET configurations for various combinations of minimum channel bandwidth and SCS. In some arrangements, each combination of minimum channel bandwidth and SCS may be mapped to a subset of indices in a table.

[0087] Alternatively or additionally, the UE may select a search space CORESET configuration table from several tables of CORESET configurations. These configurations may be based on the minimum channel bandwidth and the SCS. The UE may then look up the CORESET configuration (e.g., Type 0 - PDCCH search space CORESET configuration) from the selected table based on the index. After determining the CORESET configuration (e.g., from a single table or a selected table), the UE may then determine the CORESET to monitor based on the location (in time and frequency) of the SS / PBCH blocks and the CORESET configuration (as mentioned above).

[0088] Figure 5 An exemplary transmission resource mapping 500 according to aspects of the present disclosure is shown. In the exemplary mapping, a BS (e.g., Figure 1 BS 110a) shown in FIG. transmits SS / PBCH block 502. The SS / PBCH block includes a MIB that conveys an index to a table that relates the time and frequency resources of CORESET 504 to the time and frequency resources of the SS / PBCH block.

[0089] The BS may also transmit control signaling. In some scenarios, the BS may also send control signaling to the UE (e.g., Figure 1 120) transmits a PDCCH. The PDCCH may schedule a PDSCH 506. The BS then transmits the PDSCH to the UE. The UE may receive the MIB in the SS / PBCH block, determine an index, look up a CORESET configuration based on the index, and determine the CORESET from the CORESET configuration and the SS / PBCH block. The UE may then monitor the CORESET, decode the PDCCH in the CORESET, and receive the PDSCH allocated by the PDCCH.

[0090] Different CORESET configurations may have different parameters defining the corresponding CORESET. For example, each configuration may indicate the number of resource blocks (e.g., 24, 48, or 96), the number of symbols (e.g., 1-3), and an offset indicating a frequency position (e.g., 0-38 RBs).

[0091] QCL port and TCI status

[0092] In many cases, it is important for a UE to know which assumptions it can make about the channels corresponding to different transmissions. For example, a UE may need to know which reference signals it can use to estimate the channel in order to decode a transmitted signal (e.g., PDCCH or PDSCH). It may also be important for the UE to be able to report relevant channel state information (CSI) to a BS (e.g., gNB) for scheduling, link adaptation, and / or beam management purposes. Currently (e.g., in NR), the concepts of Quasi Co-location (QCL) and Transmission Configuration Indicator (TCI) states are used to convey information about these assumptions.

[0093] The QCL assumption is generally defined in terms of channel properties. According to 3GPP TS 38.214, "two antenna ports are said to be quasi-colocated if the properties of the channel over which the symbols on one antenna port are communicated can be inferred from the channel over which the symbols on the other antenna port are communicated." If the receiver (e.g., UE) can apply the channel properties determined by detecting the first reference signal to help detect the second reference signal, then these different reference signals can be considered to be quasi-colocated ("in QCL"). The TCI state generally includes configurations such as, for example, the QCL relationship between the downlink (DL) reference signal (RS) and the PDSCH demodulation reference signal (DMRS) ports in a CSI-RS set.

[0094] In some cases, the UE may be configured with up to M TCI states. The configuration of the M TCI states may be done via higher layer signaling, while the UE may be signaled to decode the PDSCH based on a detected PDCCH with a DCI indicating one of the TCI states. Each configured TCI state may include one RS set TCI-RS-SetConfig indicating different QCL assumptions between certain source and target signals.

[0095] Figure 6 An example of an association of DL reference signals (602, 604) and corresponding QCL types 606 that may be indicated by TCI-RS-SetConfig is illustrated.

[0096] exist Figure 6In the example of , the source RS 602 is indicated in the top block and is associated with the target signal 604 indicated in the bottom block. In this context, the target signal generally refers to a signal whose channel properties can be inferred by measuring those channel properties for the associated source signal. As mentioned above, the UE can use the source RS to determine various channel parameters depending on the associated QCL type, and use those various channel properties (determined based on the source RS) to process the target signal. The target RS does not necessarily need to be a DMRS for PDSCH, but it can be any other RS ​​type: PUSCH DMRS, CSIRS, TRS and SRS.

[0097] As illustrated, each TCI-RS-SetConfig contains parameters. For example, these parameters can configure the quasi-co-location relationship(s) between the reference signals in the RS set and the DM-RS port group of the PDSCH. The RS set contains references to one or two DLRS and the associated QCL type for each DL RS configured by the higher layer parameter QCL-Type.

[0098] like Figure 6 As illustrated, for the case of two DL RSs, the QCL type may be arranged in various ways. For example, the QCL type may be different whether the same DL RS or different DL RSs are referenced. In the illustrative example, the SSB is associated with a type C QCL for P-TRS, while the CSI-RS for beam management (CSIRS-BM) is associated with a type D QCL.

[0099] In some scenarios, the QCL information and / or type may depend on or be a function of other information. For example, the QCL type indicated to the UE may be based on a higher layer parameter QCL-Type and may be one of the following types or a combination thereof:

[0100] QCL Type A: {Doppler shift, Doppler spread, average delay, delay spread},

[0101] QCL Type B: {Doppler shift, Doppler spread},

[0102] QCL Type C: {average delay, Doppler shift}, and

[0103] QCL type D: {spatial Rx parameters},

[0104] The spatial QCL assumption (e.g., QCL type D) may be used to help the UE select an analog receive (Rx) beam (e.g., during a beam management procedure). For example, the SSB resource indicator may indicate that the same beam used for a previous reference signal should be used for a subsequent transmission.

[0105] The initial CORESET in the NR (e.g., CORESET ID 0 or simply CORESET#0) can be identified during initial access by the UE (e.g., via a field in the MIB). A control resource set information element (CORESET IE) sent via radio resource control (RRC) signaling can convey information about the CORESET configured for the UE. The CORESET IE generally includes the CORESET ID, an indication of the frequency domain resources (e.g., number of RBs) assigned to the CORESET, the continuous time duration of the CORESET in number of symbols, and a transmission configuration indicator (TCI) state.

[0106] As mentioned above, the TCI state subset provides a quasi co-location (QCL) relationship between the DL RS(s) and PDCCH demodulation RS (DMRS) ports in a RS set (e.g., TCI set). The specific TCI state for a given UE (e.g., for unicast PDCCH) can be communicated to the UE by a media access control (MAC) control element (MAC-CE). The specific TCI state is generally selected from a set of TCI states communicated by a CORESET IE, where the initial CORESET (CORESET#0) is generally configured via the MIB.

[0107] Search space information may also be provided via RRC signaling. For example, the Search Space IE is another RRC IE that defines how and where to search for PDCCH candidates for a given CORESET. Each search space is associated with one CORESET. The Search Space IE identifies the search space configured for the CORESET by the Search Space ID. In one aspect, the Search Space ID associated with CORESET#0 is Search Space ID#0. The search space is generally configured via PBCH (MIB).

[0108] Example Dynamic CORESET

[0109] Aspects of the present disclosure provide apparatuses (devices), methods, processing systems, and computer-readable media for processing and signaling dynamic control channel resources. As will be described herein, the techniques presented herein may allow for the use of more sparse "regular" periodic control channel resources, thereby allowing UEs to save power by staying in a low power state for longer periods of time (e.g., unless dynamic control channel resources are indicated in regular control channel resources).

[0110] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. Similar naming issues sometimes arise with respect to FR2, which is often (interchangeably) referred to as the “millimeter wave” band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0111] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands of these mid-band frequencies as frequency range designation FR3 (7.125GHz–24.25GHz). The frequency bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. Additionally, higher frequency bands are currently being explored to extend 5G NR operations to above 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6GHz–71GHz), FR4 (52.6GHz–114.25GHz), and FR5 (114.25GHz–300GHz). Each of these higher frequency bands falls within the EHF band.

[0112] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used in this document, the term "sub-6 GHz" and the like can broadly refer to frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if used in this document, the term "millimeter wave" and the like can broadly refer to frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-1 and / or FR5, or can be within the EHF band.

[0113] In some applications, the UE may be designed to support a limited number of NR features (also referred to as NR light or NR lightweight), for example, to keep costs low. Due to limited device capabilities in such applications, the UE may not be able to monitor the PDCCH in every time slot.

[0114] In FR4 or NR light applications, control channel resources may be sparsely configured (e.g., occurring with relatively low periodicity). UE monitoring of sparse control channels may alleviate the above-described problems and provide power saving gains. For example, in FR4, the PDCCH monitoring periodicity (e.g., configured according to the search space periodicity in NR) may be very large (e.g., much larger than 1 slot).

[0115] Unfortunately, sparse control channel resources may limit scheduling flexibility and increase latency. The dynamic configuration and indication of additional control channel resources proposed herein may help avoid these drawbacks of sparse control channel resources. In some cases, a network entity (e.g., a gNB) may dynamically indicate additional control channel resources under certain conditions, e.g., to accommodate an increase (burst) in traffic for a particular UE.

[0116] As in Figure 7 As illustrated in diagram 700 in FIG. 1 , dynamic control channel resources 704 may be indicated by dynamic signaling, e.g., via a PDCCH carrying downlink control information (DCI) or layer 1 (L1) signaling in regular (sparse / periodic) control channel resources 702. Unlike regular control channel resources 702, dynamic resources 704 are non-recurring (e.g., non-periodic) and may be used for a one-time (or limited number of) monitoring occasions.

[0117] In some cases, the network (e.g., gNB) may configure the UE to have different options for a set of dynamic control channel resources. Based on the configuration and indication, the UE may monitor a control channel (e.g., PDCCH) within the dynamic control channel resources.

[0118] As in Figure 7 As explained in , dynamic control channel resources provided between sparse conventional control channel monitoring opportunities provide additional opportunities for control channel transmission. As shown, dynamic resources can be nested within resources for PDSCH scheduled by PDCCH. As will be described below, in some cases, dynamic resources can be offset in frequency with scheduled PDSCH to avoid conflicts.

[0119] As illustrated, in some cases, the PDCCH / DCI sent in the dynamic control signal resources may indicate further additional dynamic control channel resources, which creates a chain. In some cases, if such a chain extends beyond the regular control channel resources, the UE may skip monitoring the regular control channel resources.

[0120] There are various options for how dynamic control channel resources may be triggered. For example, in some cases, one or more sets of dynamic control channel resources may be indicated simultaneously. For example, the PDCCH may be used to signal dynamic control channel resources. As illustrated, the PDCCH may be transmitted in conventional control channel resources or in other dynamic control channel resources.

[0121] In some cases, the PDCCH may be a UE-specific PDCCH for DL / UL scheduling and / or a non-scheduled group common PDCCH (e.g., no grant). In some cases, the DCI carried by the PDCCH may have one or more additional fields for indicating dynamic resources that may be added in the DCI. In other cases, a single field in the DCI may jointly trigger multiple sets of dynamic resources. In other cases, multiple separate fields may be used, each triggering a different set.

[0122] In some cases, the network entity may configure the UE with a list of one or more dynamic control channel resource sets (eg, via RRC signaling). In such cases, the trigger field in the DCI may include an index into the list.

[0123] In this case, the configuration may include various parameters such as: time / frequency resources, resource mapping type (e.g., interleaved or localized), precoding, beams (e.g., QCL / TCI states), aggregation level and / or number of PDCCH candidates.

[0124] To jointly trigger multiple dynamic control channel resource sets, a combination of more than one resource sets may be associated with a single entry in the list.

[0125] In some cases, instead of pre-configuration (partial or full dynamic control channel resource parameters), some parameters related to dynamic resources can be determined upon triggering. For example, when dynamic resources are triggered by a DL scheduled DCI, the TCI state of the dynamic resources can be determined by the TCI state of the scheduled PDSCH (this may be particularly appropriate when there is resource overlap).

[0126] Alternatively, at least one conventional control channel resource may be indicated to the UE and the UE may determine the dynamic control channel resource based on the conventional configuration. In such cases, the same resource configuration as the conventional control channel resource may be applied to the dynamic resource with some modifications. For example, the periodic configuration of the conventional control channel may be ignored and the timing may be determined by the offset relative to the triggering DCI. As mentioned above, in some cases, a frequency shift (e.g., relative to the co-scheduled PDSCH) may be applied to avoid resource conflicts. In some cases, the dynamic indication may inform the UE to skip one or more conventional control channel resources (avoid monitoring therein to find the PDCCH).

[0127] TCI / QCL determination for dynamic CORESET

[0128] As mentioned above, certain assumptions, such as the quasi co-location (QCL) assumption, may help a user equipment (UE) process downlink transmissions. Various aspects of the present disclosure provide techniques for determining QCL assumptions (relationships) for a dynamic CORESET, for example, based on the QCL relationship and the transmission configuration information (TCI) state. For example, the technique may allow a UE to know which reference signals it can use to estimate a channel in order to decode signals (e.g., PDCCH) transmitted in a dynamic CORESET. As mentioned above, the concepts of quasi co-location (QCL) and transmission configuration indicator (TCI) state are used to convey information about these assumptions.

[0129] Furthermore, while the techniques described herein may be applicable to New Radio (NR) technology, it should be appreciated that the techniques of this disclosure may be implemented with any suitable technology.

[0130] A first approach to determining the QCL / TCI for a dynamic CORESET may utilize the QCL / TCI state determination mechanism for a conventional CORESET.

[0131] According to a second approach, the TCI state for a dynamic CORESET may be dynamically indicated, for example, similar to the way the TCI state for a PDSCH is dynamically indicated, but separately. This approach may increase flexibility and may allow for refined beams.

[0132] According to a third approach, if PDSCH and the dynamic CORESET are co-scheduled (e.g., by the same DCI), the dynamic CORESET may be able to reuse the same TCI state indication as used for the (co-scheduled) physical downlink shared channel (PDSCH). This approach may enable refined beams for the dynamic CORESET. In some cases, some combination of two or more of these approaches may be used.

[0133] Figure 8 and Fig. 9 Example operations that may be performed by a UE and a network entity, respectively, for determining a QCL hypothesis for a dynamic CORESET according to a first approach are illustrated.

[0134] Figure 8 1 illustrates example operations 1100 for wireless communications by a UE in accordance with certain aspects of the present disclosure. For example, operations 1100 may be performed by Figure 1 The UE 120 performs to determine the QCL assumptions for the dynamic CORESET.

[0135] Operations 800 begin at 802 by receiving (or detecting) a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET. Fig.10 The first PDCCH in a conventional (sparse) CORESET, for example (PDCCH1), may indicate one or more dynamic CORESETs. A dynamic CORESET may be nested in a PDSCH region or may be independent and may indicate other dynamic CORESETs.

[0136] At 804, the UE receives a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one QCL assumption for the at least one dynamic CORESET. In certain aspects, the UE determines at least one QCL assumption for the at least one dynamic CORESET. In some cases, the TCI / QCL of the PDCCH DMRS may follow similar principles as the PDCCH DMRS of a conventionally scheduled CORESET (e.g., in which the first PDCCH is sent). As will be described in more detail below, in a situation where a TCI state configuration is not provided for the UE or the UE does not receive an activation command to be applied to the dynamic CORESET in sufficient time, the UE may determine the TCI / QCL for the dynamic CORESET based on various options. In some cases, the UE monitors the at least one dynamic CORESET based on the determined QCL assumption to look for at least the second PDCCH.

[0137] Fig. 9 Example operations 900 of wireless communications by a network entity are illustrated and may be considered similar to Figure 8 The operation 800 is complementary to and may be considered to be Fig.10 For example, operation 900 may be performed by scheduling to execute Figure 8 The operations 800 of the transmission of the UE 120 are performed by the gNB.

[0138] Operations 900 begin at 902 by sending a first PDCCH to a UE in a control channel monitoring occasion, the first PDCCH indicating at least one dynamic control resource set CORESET. In certain aspects, the network entity also determines at least one QCL hypothesis for the at least one dynamic control resource set.

[0139] At 904, the network entity sends at least a second PDCCH to the UE on the at least one dynamic CORESET according to the at least one QCL hypothesis determined for the at least one dynamic CORESET.

[0140] As mentioned above, in some cases, the TCI / QCL of the PDCCH DMRS in a dynamic CORESET may follow the same or similar principles (with some customization) as the PDCCH DMRS of a conventionally scheduled CORESET. For example, for a dynamic CORESET, a TCI state list may be optionally signaled in the dynamic CORESET RRC configuration (RRC messaging configures the dynamic CORESET and corresponding parameters).

[0141] A medium access control (MAC) control element (MAC-CE) may activate one of the configured TCI states, and the activated TCI state may be applied after a certain time (e.g., to give the UE time to update the beam settings in the case of QCL type D). For example, the UE may be able to The activation command is applied in the first time slot after k, where k is the time slot in which the UE transmits a PUCCH with hybrid automatic repeat request (HARQ) acknowledgement (ACK) information for the PDSCH providing the activation command and μ is the subcarrier spacing (SCS) configuration (e.g., active BWP) for the PUCCH. The active BWP may be defined as the active BWP applied in the time slot of the activation command.

[0142] In some cases, the UE may not be provided with the TCI state configuration(s) for the dynamic CORESET, may not receive a MAC-CE activation command for the TCI of the dynamic CORESET, or may not receive a MAC-CE activation command for one of the TCI states provided (e.g. in the RRC configuration) to be applied for the dynamic CORESET in sufficient time (e.g. when the dynamic CORESET is in in the previous time slot).

[0143] In such a situation (e.g., before the UE is signaled the TCI state, before the UE receives signaling to activate the TCI state, or before the UE is signaled with sufficient time to be applied for monitoring the dynamic CORESET to find the active TCI state of at least the second PDCCH, the QCL assumption is determined based on the assumption that the demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one previous downlink transmission, and the QCL assumption for the dynamic CORESET can be determined according to various options. See Fig.10 Understand the options.

[0144] For example, according to the first option, Fig.10As marked as QCL Option A in FIG. 1 , the PDCCH DMRS for the dynamic CORESET 1004 may be in QCL with the SSB 1012 identified by the UE during the initial access procedure (and used to locate the conventionally scheduled CORESET 1002). For example, the UE may monitor the dynamic CORESET using the same receive beam corresponding to the SSB.

[0145] According to the second option, Fig.10 In the example marked as QCL Option B, the PDCCH DMRS for a dynamic CORESET may be QCL with the PDCCH DMRS for a scheduled CORESET (whether dynamic or conventional). In other words, if a conventional CORESET schedules a dynamic CORESET, the PDCCH DMRS for the dynamic CORESET is QCL with the PDCCH DMRS for the conventional CORESET. If another dynamic CORESET schedules the dynamic CORESET, the PDCCH DMRS for the scheduled dynamic CORESET is CL with the PDCCH DMRS for the scheduled dynamic CORESET.

[0146] According to the third option, Fig.10 Marked as QCL option C in FIG. 4 , the PDCCH DMRS for the dynamic CORESET is QCL with the PDCCH DMRS for the original scheduling CORESET (eg, only if the scheduling CORESET is a normal CORESET).

[0147] According to the fourth option, Fig.10 In the example marked as QCL option D, the PDCCH DMRS for the dynamic CORESET is QCL with the PDCCH DMRS for the CORESET with the lowest control resource set ID in the latest time slot. In this case, the CORESET can be dynamic or regular. The lowest ID can be only for dynamic CORESETs, only for regular CORESETs, or both.

[0148] In some cases, one of multiple options may be signaled or specified (eg, one of the four QCL options AD described above).

[0149] In some cases, if the UE receives a MAC-CE activation command for one of the TCI states provided for the dynamic CORESET (e.g., provided in the RRC configuration), and the dynamic CORESET is in If the UE is provided (e.g., in the RRC configuration) with only one TCI state for the dynamic CORESET in a time slot above or after the dynamic CORESET (e.g., so that the UE has enough time to apply the activated TCI state) or the UE is provided (e.g., in the RRC configuration) with only one TCI state for the dynamic CORESET, the PDCCH DMRS for the dynamic CORESET may be in QCL with one or more DL RSs configured by the (activated or only one) TCI state.

[0150] In some cases, the network may indicate (eg, in RRC configuration or when scheduling a dynamic CORESET) that the dynamic CORESET shares the same configured and activated TCI state as its scheduling CORESET.

[0151] like Fig.11 As illustrated, in such a case, if the UE receives a MAC-CE 1106 activation command for one of the TCI states provided for the scheduling CORESET 1102 (in the RRC configuration), and the dynamic CORESET 1104 is in the time slot 1102, or the UE is provided (e.g., in the RRC configuration) with only one TCI state for scheduling CORESET 1102, the PDCCH DMRS for the dynamic CORESET 1104 is in QCL with one or more DL RSs configured by the (activated or single) TCI state (for scheduling CORESET 1102).

[0152] In some cases, the UE may not be provided with a TCI state configuration for a dynamic CORESET, the UE may not receive a MAC-CE activation command for TCI, and / or the UE may receive a MAC-CE activation command for one of the TCI states provided for the dynamic CORESET (in the RRC configuration) too late to apply it (e.g., the dynamic CORESET is not in the time slot In such a case (e.g., before the UE is signaled the TCI state, before the UE receives signaling to activate the TCI state, or before the UE is signaled with sufficient time to apply for monitoring the dynamic CORESET for the active TCI state of at least the second PDCCH, the QCL assumption is determined based on the assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one prior downlink transmission, if the dynamic CORESET timeslot is at least 100% away from the HARQ-ACK 1108 activated by the MAC-CE for scheduling the CORESET (whether dynamic or conventional) Then the PDCCH DMRS for the dynamic CORESET may be in QCL with one or more DL RSs configured by the latest (activated) TCI state for the scheduling CORESET.

[0153] In some cases, a DCI (scheduled dynamic CORESET) received on one component carrier (CC) may schedule a dynamic CORESET on another CC. Fig.11 If the scheduled CORESET 1102 of the scheduled cell is in the first CC (CC1), the DCI received in the scheduled CORESET 1102 may schedule the dynamic CORESET 1104 in the second CC (CC2). In such a case, the UE may derive its QCL assumption for the dynamic PDCCH based on the activated TCI state with the lowest ID applicable to the PDCCH (e.g., in the active BWP of the scheduled cell).

[0154] Example Communication Device

[0155] Fig.12 The description may include a method configured to perform operations for the techniques disclosed herein (such as Figure 8 1200 includes a communication device 1200 that includes various components (e.g., corresponding to means-plus-function components) of the operations illustrated in . The communication device 1200 includes a processing system 1202 coupled to a transceiver 1208. The transceiver 1208 is configured to transmit and receive signals (such as the various signals described herein) for the communication device 1200 via an antenna 1210. The processing system 1202 may be configured to perform processing functions for the communication device 1200, including processing signals received and / or to be transmitted by the communication device 1200.

[0156] The processing system 1202 includes a processor 1204 coupled to a computer-readable medium / memory 1212 via a bus 1206. In some aspects, the computer-readable medium / memory 1212 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1204, cause the processor 1204 to perform Figure 8, or other operations for performing various techniques discussed herein. In some aspects, the computer-readable medium / memory 1212 stores: code 1214 for receiving a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); and code 1216 for receiving a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one quasi-co-location (QCL) assumption for the at least one dynamic CORESET. In some aspects, the processor 1204 has a circuit system configured to implement the code stored in the computer-readable medium / memory 1212. Processor 1204 includes: a circuit system 1218 for receiving a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); and a circuit system 1220 for receiving a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one quasi co-location (QCL) assumption for the at least one dynamic CORESET.

[0157] Fig.13 The description may include a method configured to perform operations for the techniques disclosed herein (such as Fig. 9 1300 includes a communication device 1300 that includes various components (e.g., corresponding to means-plus-function components) of the operations illustrated in . The communication device 1300 includes a processing system 1302 coupled to a transceiver 1308. The transceiver 1308 is configured to transmit and receive signals (such as the various signals described herein) for the communication device 1300 via an antenna 1310. The processing system 1302 may be configured to perform processing functions for the communication device 1300, including processing signals received and / or to be transmitted by the communication device 1300.

[0158] The processing system 1302 includes a processor 1304 coupled to a computer readable medium / memory 1312 via a bus 1306. In some aspects, the computer readable medium / memory 1312 is configured to store a program that, when executed by the processor 1304, causes the processor 1304 to execute Fig. 9Instructions (e.g., computer executable code) for performing the operations illustrated in or other operations of the various techniques discussed herein. In some aspects, the computer-readable medium / memory 1312 stores: code 1314 for sending a first physical downlink control channel (PDCCH) to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); and code 1316 for sending at least a second PDCCH to the UE on the at least one dynamic CORESET based on at least one quasi-co-location (QCL) assumption determined for the at least one dynamic CORESET. In some aspects, the processor 1304 has a circuit system configured to implement the code stored in the computer-readable medium / memory 1312. Processor 1304 includes: a circuit system 1318 for sending a first physical downlink control channel (PDCCH) to the UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); and a circuit system 1320 for sending at least a second PDCCH to the UE on the at least one dynamic CORESET based on at least one quasi-co-location (QCL) assumption determined for the at least one dynamic CORESET.

[0159] Example Method

[0160] Fig.14 1400 for wireless communications by a UE in accordance with certain aspects of the present disclosure. For example, operations 1400 may be performed by Figure 1 The UE 120 performs to determine the QCL assumptions for the dynamic CORESET.

[0161] Operations 1400 begin at 1402 by detecting a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET). Fig.10 , the first PDCCH (PDCCH1) in a conventional (sparse) CORESET may indicate one or more dynamic CORESETs. A dynamic CORESET may be nested in a PDSCH region or may be independent and may indicate other dynamic CORESETs. In the case where a single PDCCH indicates a dynamic CORESET and schedules a PDSCH, the PDSCH and dynamic CORESET are referred to herein as "co-scheduled".

[0162] At 1404, the UE determines at least one quasi co-location (QCL) assumption for the dynamic CORESET. For example, in the case where no TCI state configuration is provided for the UE or the UE does not receive an activation command to be applied to the dynamic CORESET in sufficient time, in some cases, the UE may reuse the TCI / QCL assumption for the PDSCH co-scheduled with the dynamic CORESET.

[0163] At 1406, the UE monitors the at least one CORESET for at least a second PDCCH according to the determined QCL assumption.For example, where appropriate, the UE may monitor a dynamic CORESET using the QCL / TCI assumption of the co-scheduled PDSCH.

[0164] Fig.15 Example operations 1500 for wireless communications by a network entity are illustrated and may be considered similar to Fig.14 The operation 1500 is complementary to the operation 1400. For example, the operation 1500 may be performed by scheduling Fig.14 The operation 1400 of the transmission of the UE 120 is performed by the gNB.

[0165] The operations 1500 begin at 1502 by sending a first PDCCH to a UE in a control channel monitoring occasion, the first PDCCH indicating at least one dynamic CORESET.

[0166] At 1504, the network entity determines at least one QCL hypothesis for the at least one dynamic control channel resource set. At 1506, the network entity sends at least a second PDCCH to the UE on the at least one dynamic control channel resource set according to the determined QCL hypothesis.

[0167] Example aspects

[0168] Aspect 1. A method for wireless communication by a user equipment (UE), comprising: detecting a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); determining at least one quasi co-location (QCL) assumption for the at least one dynamic CORESET; and monitoring the dynamic CORESET for at least a second PDCCH based on the determined QCL assumption.

[0169] Aspect 2. The method of aspect 1, wherein the dynamic CORESET is nested within resources for a physical downlink shared channel (PDSCH).

[0170] Aspect 3. The method of aspect 1 or 2 further comprises: receiving a list of transmission configuration (TCI) states, each TCI state being associated with a QCL assumption; and receiving signaling to activate one of the TCI states in the list, wherein the determined QCL assumption corresponds to the activated TCI state.

[0171] Aspect 4. The method of aspect 3, wherein the TCI state list is received via a radio resource control (RRC) configuration message; and signaling for activating one of the TCI states includes a medium access control (MAC) control element (CE).

[0172] Aspect 5. A method as in Aspect 4, wherein the UE applies the activated TCI state at or later than a period of time after sending a physical uplink control channel (PUCCH) that confirms receipt of a physical downlink shared channel (PDSCH) carrying the MAC CE; and the period of time is at least partially based on a subcarrier spacing (SCS) configuration for the PUCCH.

[0173] Aspect 6. A method as in any one of Aspects 1-5, wherein before the UE is signaled a transmission configuration (TCI) state, before the UE receives signaling to activate the TCI state, or before the UE is signaled with sufficient time to be applied for monitoring the dynamic CORESET to find the active TCI state of at least the second PDCCH, the QCL assumption is determined based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

[0174] Aspect 7. The method of aspect 6, wherein the QCL assumption is determined based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with a synchronization signal block (SSB) identified by the UE during an initial access procedure.

[0175] Aspect 8. A method as in aspect 6 or 7, wherein the QCL assumption is determined based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one of: the DMRS for the first PDCCH or a CORESET with the lowest CORESET ID in a time slot prior to the time slot containing the dynamic control resource set (CORESET).

[0176] Aspect 9. The method of any one of aspects 6-8, further comprising receiving signaling indicating how the UE is to determine the QCL hypothesis based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one previous downlink transmission.

[0177] Aspect 10. A method as in any of Aspects 1-9, wherein, in a case where the UE is signaled with sufficient time to apply an active transmission configuration (TCI) state for monitoring the dynamic CORESET or the UE is signaled to monitor the dynamic CORESET for only one TCI state for at least a second PDCCH, the QCL assumption is determined based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the active or only one TCI state.

[0178] Aspect 11. The method of any one of aspects 1-10, further comprising receiving signaling indicating that the dynamic CORESET shares one or more configured and activated TCI states with the CORESET in which the first PDCCH is detected.

[0179] Aspect 12. The method of Aspect 11 further includes, in a case where the UE receives a MAC-CE activation command for one of the shared TCI states to be applied for monitoring the dynamic CORESET in sufficient time or in a case where the UE (in the RRC configuration) is provided with only one TCI state of the CORESET in which the first PDCCH is detected, then the QCL assumption is determined based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active or only one TCI state.

[0180] Aspect 13. A method as in any of Aspects 1-12, wherein before the UE is signaled a transmission configuration (TCI) state, before the UE receives signaling to activate the TCI state, or before the UE is signaled with sufficient time to be applied for monitoring the dynamic CORESET to find the active TCI state of at least the second PDCCH, the QCL assumption is determined based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the latest TCI state of the CORESET in which the first PDCCH is detected.

[0181] Aspect 14. A method as in any of Aspects 1-13, wherein when a first PDCCH is received on a first component carrier (CC) and the dynamic CORESET is on a second CC, the UE determines the QCL assumption for the dynamic CORESET based on an active TCI state having a transmission configuration (TCI) state ID applicable to the PDCCH in an active bandwidth part (BWP) of the second CC.

[0182] Aspect 15. A method for wireless communication by a network entity, comprising: sending a first physical downlink control channel (PDCCH) to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); determining at least one quasi co-location (QCL) assumption for the at least one dynamic CORESET; and sending at least a second PDCCH to the UE on the at least one dynamic control channel resource set based on the determined QCL assumption.

[0183] Aspect 16. The method of aspect 15, wherein the dynamic CORESET is nested within resources for a physical downlink shared channel (PDSCH).

[0184] Aspect 17. The method of aspect 15 further comprises: sending a transmission configuration (TCI) state list to the UE, each TCI state being associated with a QCL assumption; and sending signaling to activate one of the TCI states in the list to the UE, wherein the determined QCL assumption corresponds to the activated TCI state.

[0185] Aspect 18. The method of aspect 17, wherein the TCI state list is signaled via a radio resource control (RRC) configuration message; and the signaling to activate one of the TCI states includes a medium access control (MAC) control element (CE).

[0186] Aspect 19. A method as in Aspect 18, wherein the UE is permitted to apply the activated TCI state at or later than a period of time after sending a physical uplink control channel (PUCCH) that confirms receipt of a physical downlink shared channel (PDSCH) carrying the MAC CE; and the period of time is at least partially based on a subcarrier spacing (SCS) configuration for the PUCCH.

[0187] Aspect 20. A method as in any of Aspects 15-19, wherein before the network entity signals a transmission configuration indicator (TCI) state to the UE, before the network entity provides signaling to activate the TCI state to the UE, or before the network entity signals to the UE with sufficient time an active TCI state for the dynamic CORESET to be applied for monitoring the dynamic CORESET for at least a second PDCCH, the QCL assumption is determined based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

[0188] Aspect 21. The method of aspect 20, wherein the QCL assumption is determined based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with a synchronization signal block (SSB) identified by the UE during an initial access procedure.

[0189] Aspect 22. A method as in aspect 20 or 21, wherein the QCL assumption is determined based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one of: the DMRS for the first PDCCH or a CORESET with the lowest CORESET ID in a time slot prior to the time slot containing the dynamic control resource set (CORESET).

[0190] Aspect 23. The method of any one of aspects 20-22, further comprising signaling to the UE an indication of how the UE is to determine the QCL hypothesis based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

[0191] Aspect 24. A method as in any of Aspects 15-23, wherein, in a case where the UE is signaled with sufficient time to apply an active transmission configuration (TCI) state for monitoring the dynamic CORESET or the UE is signaled to monitor the dynamic CORESET for only one TCI state for at least a second PDCCH, the QCL assumption is determined based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the active or only one TCI state.

[0192] Aspect 25. The method of any one of aspects 15-24, further comprising signaling to the UE an indication that the dynamic CORESET shares one or more configured and activated TCI states with the CORESET in which the first PDCCH is detected.

[0193] Aspect 26. The method of Aspect 25 further includes, in a case where the network entity sends a MAC-CE activation command for one of the shared TCI states for the UE application to monitor the dynamic CORESET with sufficient time or in a case where the UE (in the RRC configuration) is provided with only one TCI state of the CORESET in which the first PDCCH is detected, then the QCL assumption is determined based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the active or only one TCI state.

[0194] Aspect 27. A method as in any of Aspects 15-26, wherein before the network entity signals the UE a transmission configuration indicator (TCI) state, before the network entity provides signaling to the UE to activate the TCI state, or before the network entity signals the UE with sufficient time to apply an active TCI state for the dynamic CORESET to be used for monitoring the dynamic CORESET for at least a second PDCCH, the QCL assumption is determined based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the latest TCI state for the CORESET in which the first PDCCH was detected.

[0195] Aspect 28. A method as in any of Aspects 15-27, wherein when a first PDCCH is sent on a first component carrier (CC) and the dynamic CORESET is on a second CC, the QCL assumption for the dynamic CORESET is determined based on an active TCI state having a transmission configuration (TCI) state ID applicable to a PDCCH in an active bandwidth part (BWP) of the second CC.

[0196] Aspect 29. A method for wireless communication by a UE, comprising: receiving a first PDCCH in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and receiving a second PDCCH within the dynamic CORESET, wherein the second PDCCH is received based on at least one QCL assumption for the at least one dynamic CORESET.

[0197] Aspect 30. The method of aspect 29, wherein the dynamic CORESET is nested within resources for PDSCH.

[0198] Aspect 31. The method of aspect 29 or 30 further comprises: receiving a TCI state list, each TCI state being associated with a QCL hypothesis; and receiving signaling to activate one of the TCI states in the TCI state list, wherein the QCL hypothesis corresponds to the activated TCI state.

[0199] Aspect 32. The method of aspect 31, wherein the TCI state list is received via an RRC configuration message; and the signaling to activate one of the TCI states includes a MAC CE.

[0200] Aspect 33. A method as in aspect 32, wherein receiving the second PDCCH comprises applying the activated TCI state after at least a period of time since sending a PUCCH acknowledging receipt of the PDSCH carrying the MAC CE; and the period of time is based at least in part on the SCS configuration for the PUCCH.

[0201] Aspect 34. The method of any one of aspects 29-33, wherein the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with at least one previous downlink transmission.

[0202] Aspect 35. The method of aspect 34, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with the SSB identified by the UE during an initial access procedure.

[0203] Aspect 36. A method as in aspect 34 or 35, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one of: the DMRS for the first PDCCH or a CORESET with a lowest CORESET ID in a slot prior to the slot containing the dynamic CORESET.

[0204] Aspect 37. The method of any one of aspects 34-36, further comprising receiving signaling indicating that the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

[0205] Aspect 38. A method as in any of Aspects 29-37, wherein when the UE is signaled with sufficient time to apply an active TCI state for monitoring the dynamic CORESET or when the UE is signaled to monitor the dynamic CORESET for only one TCI state for at least a second PDCCH, the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the active or only one TCI state.

[0206] Aspect 39. The method of any one of aspects 29-38, further comprising receiving signaling indicating that the dynamic CORESET shares one or more configured and activated TCI states with the CORESET in which the first PDCCH is detected.

[0207] Aspect 40. The method of aspect 39 further includes, in a case where the UE receives a MAC-CE activation command for one of the shared TCI states to be applied for monitoring the dynamic CORESET in sufficient time or in a case where the UE is provided with only one TCI state of the CORESET in which the first PDCCH is detected, then the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the active or only one TCI state.

[0208] Aspect 41. A method as in any of Aspects 29-40, wherein before the UE is signaled a transmission configuration (TCI) state, before the UE receives signaling to activate the TCI state, or before the UE is signaled with sufficient time to be applied for monitoring the dynamic CORESET to find the active TCI state of at least the second PDCCH, the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the latest TCI state of the CORESET in which the first PDCCH is detected.

[0209] Aspect 42. A method as in any of Aspects 29-41, wherein in a case where a first PDCCH is received on a first CC and the dynamic CORESET is on a second CC, the QCL for the dynamic CORESET assumes a TCI state according to a TCI state ID of a PDCCH in an active BWP applicable to the second CC.

[0210] Aspect 43. A method for wireless communication by a network entity, comprising: sending a first PDCCH to a UE in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic CORESET; and sending at least a second PDCCH to the UE on the at least one dynamic CORESET based on at least one QCL hypothesis determined for the at least one dynamic CORESET.

[0211] Aspect 44. The method of aspect 43, wherein the dynamic CORESET is nested within resources for PDSCH.

[0212] Aspect 45. The method of aspect 43 or 44 further comprises: sending a TCI state list to the UE, each TCI state being associated with a QCL hypothesis; and sending a signaling to activate one of the TCI states in the TCI list to the UE, wherein the QCL hypothesis corresponds to the activated TCI state.

[0213] Aspect 46. The method of aspect 45, wherein the TCI state list is signaled via an RRC configuration message; and the signaling to activate one of the TCI states includes a MAC CE.

[0214] Aspect 47. The method of aspect 46, wherein the UE is allowed to apply the activated TCI state for a period of time after sending a PUCCH confirming the PDSCH carrying the MAC CE; and the period of time is based at least in part on the SCS configuration for the PUCCH.

[0215] Aspect 48. The method of any one of aspects 43-47, wherein the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

[0216] Aspect 49. The method of aspect 48, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with the SSB identified by the UE during an initial access procedure.

[0217] Aspect 50. A method as in aspect 48 or 49, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one of: the DMRS for the first PDCCH or a CORESET with a lowest CORESET ID in a slot prior to the slot containing the dynamic CORESET.

[0218] Aspect 51. The method of any one of aspects 48-50, further comprising signaling to the UE an indication that the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

[0219] Aspect 52. A method as in any of Aspects 43-51, wherein in the case where the UE is signaled with sufficient time to apply an active TCI state for monitoring the dynamic CORESET or the UE is signaled to monitor the dynamic CORESET for only one TCI state for at least a second PDCCH, the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the active or only one TCI state.

[0220] Aspect 53. The method of any one of Aspects 43-52, further comprising signaling to the UE an indication that the dynamic CORESET shares one or more configured and activated TCI states with the CORESET in which the first PDCCH is detected.

[0221] Aspect 54. A method as in Aspect 53, wherein in a case where the network entity sends a MAC-CE activation command for one of the shared TCI states for the UE application to monitor the dynamic CORESET in sufficient time or in a case where the UE is provided with only one TCI state of the CORESET in which the first PDCCH is detected, then the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the active or only one TCI state.

[0222] Aspect 55. A method as in any of Aspects 43-54, wherein before the network entity signals the TCI state to the UE, before the network entity provides signaling to activate the TCI state to the UE, or before the network entity signals the UE with sufficient time to apply the active TCI state for the dynamic CORESET to be used for monitoring the dynamic CORESET for at least the second PDCCH, the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the latest TCI state for the CORESET in which the first PDCCH was detected.

[0223] Aspect 56. A method as in any of aspects 43-55, wherein in a case where the first PDCCH is sent on the first CC and the dynamic CORESET is on the second CC, the QCL for the dynamic CORESET assumes a TCI state according to the TCI state ID of the PDCCH in the active BWP applicable to the second CC.

[0224] Aspect 57. An apparatus comprising: a memory including executable instructions; and one or more processors configured to execute the executable instructions and cause the apparatus to perform a method according to any of clauses 1-56.

[0225] Aspect 58. An apparatus comprising means for performing the method according to any one of aspects 1-56.

[0226] Aspect 59. A non-transitory computer readable medium comprising executable instructions which, when executed by one or more processors of an apparatus, cause the apparatus to perform a method according to any of aspects 1-56.

[0227] Aspect 60. A computer program product embodied on a computer-readable storage medium, the computer-readable storage medium comprising code for executing the method according to any one of aspects 1-56.

[0228] Each method disclosed herein includes one or more steps or actions for implementing the method. These method steps and / or actions can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be changed without departing from the scope of the claims.

[0229] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of these items, including single members. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c). As used herein, the term "determine" covers a variety of actions. For example, "determine" may include calculation, calculation, processing, derivation, research, search (e.g., search in a table, database, or another data structure), ascertainment, and the like. Moreover, "determine" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Similarly, "determine" may also include parsing, selecting, choosing, establishing, and similar actions.

[0230] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the various aspects shown herein, but should be granted the full scope consistent with the language of the claims, wherein the singular reference to the element is not intended to mean "there is and only one" (unless specifically stated) but "one or more". Unless otherwise specifically stated, the term "some / some" refers to one or more. The elements of the various aspects described throughout this disclosure are all structural and functional equivalents currently or hereafter known to ordinary technicians in the art and are expressly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be donated to the public, regardless of whether such disclosure is explicitly recorded in the claims. Any element of the claim should not be interpreted under the provisions of 35 USC§112(f), unless the element is explicitly stated using the phrase "device for..." or in the case of a method claim, the element is stated using the phrase "step for..."

[0231] The various operations of the methods described above may be performed by any suitable device capable of performing the corresponding functions. These devices may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs), or processors. For example, Figure 2The processors 258, 264, 266 and / or the controller / processor 280 of the UE 120 and / or the processors 220, 230, 238 and / or the controller / processor 240 of the BS 110 shown in FIG. 1 may be configured to perform Figure 8 Operation 800 or Fig. 9 Operation 900.

[0232] The means for receiving may include Figure 2 The device for transmitting may include a receiver (such as one or more antennas or a receiving processor) as described in Figure 2 The transmitter (such as one or more antennas or a transmit processor) illustrated in . The means for determining, the means for processing, the means for handling, and the means for applying may include a processing system, which may include one or more processors, such as Figure 2 1 and 120. The processors 258, 264, 266, and / or the controller / processor 280 of the UE 120, and / or the processors 220, 230, 238, and / or the controller / processor 240 of the BS 110 are shown in FIG.

[0233] In some cases, a device may not actually transmit a frame, but may have an interface (means for outputting) for outputting a frame for transmission. For example, a processor may output a frame to a radio frequency (RF) front end via a bus interface for transmission. Similarly, a device may not actually receive a frame, but may have an interface (means for obtaining) for obtaining a frame received from another device. For example, a processor may obtain (or receive) a frame from an RF front end via a bus interface for reception.

[0234] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0235] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the user terminal 120 (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art and will not be described further. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems capable of executing software. Those skilled in the art will recognize how to best implement the functionality described with respect to the processing system, depending on the specific application and the overall design constraints imposed on the overall network or system.

[0236] If implemented in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, which include any media that facilitate the transfer of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. As an example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, a machine-readable medium or any part thereof may be integrated into a processor, such as a cache and / or a general register file, which may be the case. As an example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be implemented in a computer program product.

[0237] A software module may include a single instruction, or many instructions, and may be distributed over several different code segments, distributed between different programs, and distributed across multiple storage media. A computer-readable medium may include several software modules. These software modules include instructions that cause a processing system to perform various functions when executed by an apparatus such as a processor. These software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded into a RAM from a hard drive. During the execution of a software module, a processor may load some instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When describing the functionality of a software module as described below, it will be understood that such functionality is implemented by the processor when the processor executes instructions from the software module.

[0238] Likewise, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared (IR), radio, and microwave), then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (such as infrared, radio, and microwave) is included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Disks, where disks often reproduce data magnetically, and discs reproduce data optically with lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0239] Thus, some aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded) thereon, which instructions can be executed by one or more processors to perform the operations described herein. For example, for performing the operations described herein and in Figure 8-9 The instructions explained in .

[0240] In addition, it should be appreciated that modules and / or other appropriate means for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or base station where applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage device (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that once the storage device is coupled to or provided to a user terminal and / or base station, the device can obtain the various methods. In addition, any other suitable technology suitable for providing the methods and techniques described herein to a device may be utilized.

[0241] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: receiving a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); as well as A second PDCCH is received within the at least one dynamic CORESET, wherein the second PDCCH is received according to at least one quasi co-location (QCL) assumption for the at least one dynamic CORESET.

2. The method of claim 1, wherein the at least one dynamic CORESET is nested within resources for a physical downlink shared channel (PDSCH).

3. The method of claim 1, further comprising: receiving a list of transmission configuration indicator (TCI) states, each TCI state being associated with a QCL hypothesis; as well as Signaling is received to activate one of the TCI states in the list of TCI states, wherein the QCL hypothesis corresponds to the activated TCI state.

4. The method of claim 3, wherein: The list of TCI states is received via a radio resource control (RRC) configuration message; and The signaling to activate one of the TCI states includes a medium access control (MAC) control element (CE).

5. The method of claim 4, wherein: Receiving the second PDCCH includes applying the activated TCI state after at least a period of time since sending a physical uplink control channel (PUCCH) acknowledging a physical downlink shared channel (PDSCH) carrying the MAC CE; and The period is based at least in part on a subcarrier spacing (SCS) configuration for the PUCCH.

6. The method of claim 1, wherein the QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

7. The method of claim 6, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with a synchronization signal block (SSB) identified by the UE during an initial access procedure.

8. The method of claim 6, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one of: the DMRS used for the first PDCCH or a CORESET with a lowest CORESET ID in a time slot prior to a time slot containing the dynamic control resource set (CORESET).

9. The method of claim 6, further comprising receiving signaling indicating that the QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

10. A method as claimed in claim 1, wherein, in the case where the UE is signaled with sufficient time to apply an active transmission configuration indicator (TCI) state for monitoring the at least one dynamic CORESET or the UE is signaled to monitor the at least one dynamic CORESET to find only one TCI state of at least the second PDCCH, the QCL assumption is based on the assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active TCI state or only one TCI state.

11. The method of claim 1 , further comprising receiving signaling indicating that the at least one dynamic CORESET shares one or more configured and activated TCI states with a CORESET in which the first PDCCH is detected.

12. The method of claim 11, wherein: in case the UE receives a MAC-CE activation command for one of the shared TCI states to be applied for monitoring the at least one dynamic CORESET in sufficient time or in case the UE is provided with only one TCI state for the CORESET in which the first PDCCH is detected; then The QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active TCI state or only one TCI state.

13. The method of claim 1, wherein: Before the UE is signaled a transmission configuration indicator (TCI) state, before the UE receives signaling to activate the TCI state, or before the UE is signaled with sufficient time to be applied to monitor the at least one dynamic CORESET to find the active TCI state of at least the second PDCCH, the QCL assumption is based on the assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the latest TCI state of the CORESET in which the first PDCCH was detected.

14. The method of claim 1, wherein, in a case where the first PDCCH is received on a first component carrier (CC) and the at least one dynamic CORESET is on a second CC, the QCL assumption for the at least one dynamic CORESET is based on an active TCI state with a transmission configuration indicator (TCI) state identifier (ID) applicable to a PDCCH in an active bandwidth part (BWP) of the second CC.

15. A method for wireless communication by a network entity, comprising: sending a first physical downlink control channel (PDCCH) to a user equipment (UE) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); as well as At least a second PDCCH is sent to the UE on the at least one dynamic CORESET according to at least one quasi co-location (QCL) assumption determined for the at least one dynamic CORESET.

16. The method of claim 15, wherein the at least one dynamic CORESET is nested within resources for a physical downlink shared channel (PDSCH).

17. The method of claim 15, further comprising: sending a list of transmission configuration indicator (TCI) states to the UE, each TCI state being associated with a QCL assumption; as well as Signaling is sent to the UE to activate one of the TCI states in the list of TCI states, wherein the QCL assumption corresponds to the activated TCI state.

18. The method of claim 17, wherein: The list of TCI states is signaled via a radio resource control (RRC) configuration message; and The signaling to activate one of the TCI states includes a medium access control (MAC) control element (CE).

19. The method of claim 18, wherein: The UE is allowed to apply the activated TCI state for a period of time after sending a physical uplink control channel (PUCCH) that confirms receipt of a physical downlink shared channel (PDSCH) carrying the MAC CE; and The period is based at least in part on a subcarrier spacing (SCS) configuration for the PUCCH.

20. The method of claim 15, wherein the QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

21. The method of claim 20, wherein the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with a synchronization signal block (SSB) identified by the UE during an initial access procedure.

22. The method of claim 20, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one of: the DMRS used for the first PDCCH or a CORESET with a lowest CORESET ID in a time slot prior to a time slot containing the at least one dynamic control resource set (CORESET).

23. The method of claim 20, further comprising signaling to the UE an indication that the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

24. The method of claim 15, wherein: In the case where the UE is signaled with sufficient time to apply an active transmission configuration indicator (TCI) state for monitoring the at least one dynamic CORESET or the UE is signaled to monitor the at least one dynamic CORESET for only one TCI state of at least the second PDCCH, the QCL assumption is based on the assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active TCI state or only one TCI state.

25. The method of claim 15, further comprising signaling to the UE an indication that the at least one dynamic CORESET shares one or more configured and activated TCI states with a CORESET in which the first PDCCH is detected.

26. The method of claim 25, wherein: in case the network entity sends a MAC-CE activation command for one of the shared TCI states for the UE to apply for monitoring the at least one dynamic CORESET in sufficient time or in case the UE is provided with only one TCI state for the CORESET in which the first PDCCH is detected; then The QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active TCI state or only one TCI state.

27. The method of claim 15, wherein: Before the network entity signals a transmission configuration indicator (TCI) state to the UE, before the network entity provides signaling to activate the TCI state to the UE, or before the network entity signals to the UE with sufficient time an active TCI state for the at least one dynamic CORESET to be applied for monitoring the at least one dynamic CORESET for at least the second PDCCH, the QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the latest TCI state for the CORESET in which the first PDCCH was detected.

28. The method of claim 15, wherein: In a case where the first PDCCH is sent on a first component carrier (CC) and the at least one dynamic CORESET is on a second CC, the QCL for the at least one dynamic CORESET assumes an active TCI state according to a transmission configuration indicator (TCI) state identifier (ID) applicable to a PDCCH in an active bandwidth part (BWP) of the second CC.

29. An apparatus for wireless communication by a user equipment (UE), comprising: Memory; as well as at least one processor coupled to the memory, the memory and the at least one processor being configured to: receiving a first physical downlink control channel (PDCCH) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); as well as A second PDCCH is received within the at least one dynamic CORESET, wherein the second PDCCH is received according to at least one quasi co-location (QCL) assumption for the at least one dynamic CORESET.

30. The apparatus of claim 29, wherein the at least one dynamic CORESET is nested within resources for a physical downlink shared channel (PDSCH).

31. The apparatus of claim 29, wherein the memory and the at least one processor are further configured to: receiving a list of transmission configuration indicator (TCI) states, each TCI state being associated with a QCL hypothesis; and Signaling is received to activate one of the TCI states in the list of TCI states, wherein the QCL hypothesis corresponds to the activated TCI state.

32. The apparatus of claim 31, wherein: The list of TCI states is received via a radio resource control (RRC) configuration message; and The signaling to activate one of the TCI states includes a medium access control (MAC) control element (CE).

33. The apparatus of claim 32, wherein: The memory and the at least one processor configured to receive the second PDCCH are further configured to apply the activated TCI state after at least a period of time since sending a physical uplink control channel (PUCCH) acknowledging a physical downlink shared channel (PDSCH) carrying the MAC CE; and The period is based at least in part on a subcarrier spacing (SCS) configuration for the PUCCH.

34. The apparatus of claim 29, wherein the QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

35. The apparatus of claim 34, wherein the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with a synchronization signal block (SSB) identified by the UE during an initial access procedure.

36. An apparatus as described in claim 34, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one of: the DMRS used for the first PDCCH or a CORESET with a lowest CORESET ID in a time slot prior to the time slot containing the dynamic control resource set (CORESET).

37. The apparatus of claim 34, wherein the memory and the at least one processor are further configured to receive signaling indicating that the QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

38. An apparatus as claimed in claim 29, wherein, in the case where the UE is signaled with sufficient time to apply an active transmission configuration indicator (TCI) state for monitoring the at least one dynamic CORESET or the UE is signaled to monitor the at least one dynamic CORESET to find only one TCI state of at least the second PDCCH, the QCL assumption is based on the assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active TCI state or only one TCI state.

39. The apparatus of claim 29, the memory and the at least one processor further configured to: receive signaling indicating that the at least one dynamic CORESET shares one or more configured and activated TCI states with a CORESET in which the first PDCCH is detected.

40. The apparatus of claim 39, wherein: in case the UE receives a MAC-CE activation command for one of the shared TCI states to be applied for monitoring the at least one dynamic CORESET in sufficient time or in case the UE is provided with only one TCI state for the CORESET in which the first PDCCH is detected; then The QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active TCI state or only one TCI state.

41. The apparatus of claim 29, wherein: Before the UE is signaled a transmission configuration indicator (TCI) state, before the UE receives signaling to activate the TCI state, or before the UE is signaled with sufficient time to be applied to monitor the at least one dynamic CORESET to find the active TCI state of at least the second PDCCH, the QCL assumption is based on the assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the latest TCI state of the CORESET in which the first PDCCH was detected.

42. The apparatus of claim 29, wherein, in a case where the first PDCCH is received on a first component carrier (CC) and the at least one dynamic CORESET is on a second CC, the QCL assumption for the at least one dynamic CORESET is based on an active TCI state with a transmission configuration indicator (TCI) state identifier (ID) applicable to a PDCCH in an active bandwidth part (BWP) of the second CC.

43. An apparatus for wireless communication by a network entity, comprising: Memory; as well as at least one processor coupled to the memory, the memory and the at least one processor being configured to: sending a first physical downlink control channel (PDCCH) to a user equipment (UE) in a control channel monitoring opportunity, the first PDCCH indicating at least one dynamic control resource set (CORESET); as well as At least a second PDCCH is sent to the UE on the at least one dynamic CORESET according to at least one quasi co-location (QCL) assumption determined for the at least one dynamic CORESET.

44. The apparatus of claim 43, wherein the at least one dynamic CORESET is nested within resources for a physical downlink shared channel (PDSCH).

45. The apparatus of claim 43, wherein the memory and the at least one processor are further configured to: sending a list of transmission configuration indicator (TCI) states to the UE, each TCI state being associated with a QCL assumption; and Signaling is sent to the UE to activate one of the TCI states in the list of TCI states, wherein the QCL assumption corresponds to the activated TCI state.

46. ​​The apparatus of claim 45, wherein: The list of TCI states is signaled via a radio resource control (RRC) configuration message; and The signaling to activate one of the TCI states includes a medium access control (MAC) control element (CE).

47. The apparatus of claim 46, wherein: The UE is allowed to apply the activated TCI state for a period of time after sending a physical uplink control channel (PUCCH) that confirms receipt of a physical downlink shared channel (PDSCH) carrying the MAC CE; and The period is based at least in part on a subcarrier spacing (SCS) configuration for the PUCCH.

48. The apparatus of claim 43, wherein the QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

49. The apparatus of claim 48, wherein the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with a synchronization signal block (SSB) identified by the UE during an initial access procedure.

50. An apparatus as described in claim 48, wherein the QCL assumption is based on an assumption that the DMRS of the second PDCCH shares a QCL relationship with at least one of: the DMRS used for the first PDCCH or a CORESET with a lowest CORESET ID in a time slot prior to the time slot containing the at least one dynamic control resource set (CORESET).

51. The apparatus of claim 48, wherein the memory and the at least one processor are further configured to signal to the UE an indication that the QCL assumption is based on an assumption that a DMRS of the second PDCCH shares a QCL relationship with at least one prior downlink transmission.

52. The apparatus of claim 43, wherein: In the case where the UE is signaled with sufficient time to apply an active transmission configuration indicator (TCI) state for monitoring the at least one dynamic CORESET or the UE is signaled to monitor the at least one dynamic CORESET for only one TCI state of at least the second PDCCH, the QCL assumption is based on the assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active TCI state or only one TCI state.

53. The apparatus of claim 43, the memory and the at least one processor being further configured to: signal to the UE an indication that the at least one dynamic CORESET shares one or more configured and activated TCI states with a CORESET in which the first PDCCH is detected.

54. The apparatus of claim 53, wherein: in case the network entity sends a MAC-CE activation command for one of the shared TCI states for the UE to apply for monitoring the at least one dynamic CORESET in sufficient time or in case the UE is provided with only one TCI state for the CORESET in which the first PDCCH is detected; then The QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by an active TCI state or only one TCI state.

55. The apparatus of claim 43, wherein: Before the network entity signals a transmission configuration indicator (TCI) state to the UE, before the network entity provides signaling to activate the TCI state to the UE, or before the network entity signals to the UE with sufficient time an active TCI state for the at least one dynamic CORESET to be applied for monitoring the at least one dynamic CORESET for at least the second PDCCH, the QCL assumption is based on an assumption that a demodulation reference signal (DMRS) of the second PDCCH shares a QCL relationship with at least one downlink reference signal configured by the latest TCI state for the CORESET in which the first PDCCH was detected.

56. The apparatus of claim 43, wherein: In a case where the first PDCCH is sent on a first component carrier (CC) and the at least one dynamic CORESET is on a second CC, the QCL for the at least one dynamic CORESET assumes an active TCI state according to a transmission configuration indicator (TCI) state identifier (ID) applicable to a PDCCH in an active bandwidth part (BWP) of the second CC.

Images