Indicating transmission configuration indicator state based on aperiodic channel state information reference signal

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a configuration that configures transmit configuration indicator (TCI) states based at least in part on an aperiodic channel state information reference signal (AP-CSI-RS), where each TCI state includes a first resource that is an aperiodic tracking reference signal (AP-TRS) and a second resource that is an AP-CSI-RS. In some embodiments, the UE may receive first downlink control information that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RSs each associated with a quasi-co-location (QCL) type D resource. The UE may transmit a report indicating the one or more AP-CSI-RSs. The UE may receive an activation command to activate a TCI state associated with a first narrow beam, wherein a combination of a first AP-CSI-RS and a first associated QCL type D resource uniquely indicates the first narrow beam. Numerous other aspects are described.

Description

[0001] Cross - Reference to Related Applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 387,440, filed on December 14, 2022, entitled "INDICATING TRANSMISSION CONFIGURATION INDICATOR STATE BASED ON APERIODIC CHANNEL STATE INFORMATION REFERENCE SIGNAL", and U.S. Non - Provisional Patent Application No. 18 / 482,234, filed on October 6, 2023, entitled "INDICATING TRANSMISSION CONFIGURATION INDICATOR STATE BASED ON APERIODIC CHANNEL STATE INFORMATION REFERENCE SIGNAL", which are hereby incorporated by reference in their entirety. Field of the Disclosure

[0003] Aspects of the present disclosure generally relate to wireless communication and relate to techniques and apparatus for indicating a transmission configuration indicator state based on an aperiodic channel state information reference signal. Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ multiple access techniques capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access techniques include 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, time - division synchronous code - division multiple access (TD - SCDMA) systems, and Long Term Evolution (LTE). LTE / Advanced LTE is an enhanced collection of the Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more network nodes that support communication for wireless communication devices such as user equipment (UE) or multiple UEs. The UE may communicate with the network node via downlink communication and uplink communication. "Downlink" (or "DL") refers to the communication link from the network node to the UE, and "uplink" (or "UL") refers to the communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via a local link (e.g., sidelink (SL), wireless local area network (WLAN) link, and / or wireless personal area network (WPAN) link, etc.).

[0006] The above multi-access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at the urban, national, regional, and / or global levels. New Radio (NR), which may be referred to as 5G, is an enhanced set of LTE mobile standards promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by: improving spectral efficiency; reducing costs; improving services; leveraging new spectrums; and better integrating with other open standards by using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the downlink, CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)) on the uplink; and supporting beamforming, Multiple Input Multiple Output (MIMO) antenna technology, and carrier aggregation. With the continuous increase in the demand for mobile broadband access, further improvements to LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0007] Some aspects described herein relate to a method of wireless communication performed by a network entity. The method may include: transmitting a configuration for configuring a transmission configuration indicator (TCI) state based at least in part on an aperiodic channel state information reference signal (AP-CSI-RS), wherein each TCI state includes a first resource that is an aperiodic tracking reference signal (AP-TRS) and a second resource that is an AP-CSI-RS. The method may include: transmitting a first downlink control information (DCI) that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RSs each associated with a quasi co-location (QCL) type D resource, wherein the QCL type D resource is a TRS or a synchronization signal block (SSB). The method may include: receiving a report of one or more AP-CSI-RSs. The method may include: selecting a first AP-CSI-RS from the one or more AP-CSI-RSs, wherein a combination of the first AP-CSI-RS and a first associated QCL type D resource uniquely indicates a first narrow beam. The method may include: transmitting an activation command that activates the TCI state associated with the first narrow beam. The method may include: using the TCI state to transmit or receive a reference signal.

[0008] Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include: receiving a configuration for configuring a TCI state based at least in part on an AP-CSI-RS, wherein each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The method may include: receiving a first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RSs each associated with a QCL type D resource, wherein the QCL type D resource is a TRS or an SSB. The method may include: selecting one or more AP-CSI-RSs based at least in part on AP-CSI-RS measurements. The method may include: transmitting a report indicating the one or more AP-CSI-RSs. The method may include: receiving an activation command that activates the TCI state associated with a first narrow beam, wherein a combination of a first AP-CSI-RS and a first associated QCL type D resource uniquely indicates the first narrow beam. The method may include: using the TCI state to transmit or receive a reference signal.

[0009] Some aspects described herein relate to a network entity for wireless communication. The network entity may include a memory, one or more processors coupled to the memory, and instructions stored in the memory and executable by the one or more processors (e.g., directly, indirectly, after preprocessing, without preprocessing). The instructions may be executable by the one or more processors to cause the network entity to: send a configuration for configuring a TCI state based at least in part on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The instructions may be executable by the one or more processors to cause the network entity to: send a first DCI triggering a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB. The instructions may be executable by the one or more processors to cause the network entity to: receive a report of one or more AP-CSI-RS. The instructions may be executable by the one or more processors to cause the network entity to: select a first AP-CSI-RS from the one or more AP-CSI-RS, where the combination of the first AP-CSI-RS and a first associated QCL type D resource uniquely indicates a first narrow beam. The instructions may be executable by the one or more processors to cause the network entity to: send an activation command activating a TCI state associated with the first narrow beam. The instructions may be executable by the one or more processors to cause the network entity to: use the TCI state to send or receive a reference signal.

[0010] Some aspects described herein relate to a UE for wireless communication. The UE may include a memory, one or more processors coupled to the memory, and instructions stored in the memory and executable by the one or more processors (e.g., directly, indirectly, after preprocessing, without preprocessing). The instructions may be executable by the one or more processors to cause the UE to: receive a configuration for configuring a TCI state based at least in part on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The instructions may be executable by the one or more processors to cause the user equipment to: receive a first DCI triggering a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB. The instructions may be executable by the one or more processors to cause the user equipment to: select one or more AP-CSI-RS at least in part based on AP-CSI-RS measurements. The instructions may be executable by the one or more processors to cause the user equipment to: transmit a report indicating the one or more AP-CSI-RS. The instructions may be executable by the one or more processors to cause the user equipment to: receive an activation command activating a TCI state associated with a first narrow beam, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam. The instructions may be executable by the one or more processors to cause the user equipment to: use the TCI state to transmit or receive a reference signal.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing one or more instructions for wireless communication by a network entity. The one or more instructions, when executed by one or more processors of the network entity, may cause the network entity to: transmit a configuration for configuring a TCI state based at least in part on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The one or more instructions, when executed by one or more processors of the network entity, may cause the network entity to: transmit a first DCI triggering a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB. The one or more instructions, when executed by one or more processors of the network entity, may cause the network entity to: receive a report of one or more AP-CSI-RS. The one or more instructions, when executed by one or more processors of the network entity, may cause the network entity to: select a first AP-CSI-RS from the one or more AP-CSI-RS, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates a first narrow beam. The one or more instructions, when executed by one or more processors of the network entity, may cause the network entity to: transmit an activation command activating a TCI state associated with the first narrow beam. The one or more instructions, when executed by one or more processors of the network entity, may cause the network entity to: transmit or receive a reference signal using the TCI state.

[0012] Some aspects described herein relate to a non-transitory computer-readable medium storing one or more instructions for wireless communication by a UE. The one or more instructions, when executed by one or more processors of the UE, may cause the UE to: receive a configuration for configuring a TCI state based at least in part on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The one or more instructions, when executed by one or more processors of the UE, may cause the UE to: receive a first DCI triggering a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB. The one or more instructions, when executed by one or more processors of the UE, may cause the UE to: select one or more AP-CSI-RS at least in part based on AP-CSI-RS measurements. The one or more instructions, when executed by one or more processors of the UE, may cause the UE to: send a report indicating the one or more AP-CSI-RS. The one or more instructions, when executed by one or more processors of the UE, may cause the UE to: receive an activation command activating a TCI state associated with a first narrow beam, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam. The one or more instructions, when executed by one or more processors of the UE, may cause the UE to: use the TCI state to transmit or receive a reference signal.

[0013] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include: means for sending a configuration for configuring a TCI state based at least in part on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The apparatus may include: means for sending a first DCI triggering a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB. The apparatus may include: means for receiving a report of one or more AP-CSI-RS. The apparatus may include: means for selecting a first AP-CSI-RS from the one or more AP-CSI-RS, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates a first narrow beam. The apparatus may include: means for sending an activation command activating a TCI state associated with the first narrow beam. The apparatus may include: means for using the TCI state to transmit or receive a reference signal.

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include: means for receiving a configuration for configuring TCI states based at least in part on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The apparatus may include: means for receiving a first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB. The apparatus may include: means for selecting one or more AP-CSI-RS at least in part based on AP-CSI-RS measurements. The apparatus may include: means for sending a report indicating the one or more AP-CSI-RS. The apparatus may include: means for receiving an activation command that activates a TCI state associated with a first narrow beam, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam. The apparatus may include: means for transmitting or receiving a reference signal using the TCI state.

[0015] The aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, UEs, base stations, network entities, network nodes, wireless communication devices, and / or processing systems as fully described herein with reference to the drawings and the specification and illustrated in the drawings and the specification.

[0016] The features and technical advantages of examples in accordance with the present disclosure have been outlined above rather broadly in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the features of the concepts disclosed herein, the organization and method of operation thereof, and the associated advantages, will be better understood from the following description. Each of the drawings provided in the present disclosure is for the purposes of illustration and description and not as a definition of the limits of the claims.

[0017] Although aspects are described herein by way of illustration of some examples, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects can be implemented via an integrated chip implementation or other non-module component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / shopping devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features can include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals can include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). The aspects described herein are intended to be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user devices of various sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To gain a more detailed understanding of the above features of the present disclosure, a more specific description of the above briefly summarized inventive concepts can be obtained by referring to aspects, some of which are illustrated in the drawings. However, it should be noted that the drawings only illustrate certain typical aspects of the present disclosure and are therefore not considered to limit its scope, as the specification may admit other equally valid aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 is a diagram illustrating an example of a network entity (e.g., a network node) communicating with a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of a decomposed base station architecture according to the present disclosure.

[0022] Figure 4 is a diagram illustrating examples of a channel state information reference signal (CSI-RS) beam management process according to the present disclosure.

[0023] Figure 5 is a diagram illustrating an example of a beam management process according to the present disclosure.

[0024] Figure 6FIG. is an illustration showing an example of a transmission configuration indicator (TCI) state for an aperiodic CSI-RS (AP-CSI-RS) according to the present disclosure.

[0025] Figure 7 FIG. is an illustration showing an example associated with defining a TCI state based on an AP-CSI-RS identifier according to the present disclosure.

[0026] Figure 8 FIG. is an illustration showing an example of beam selection with two resource sets according to the present disclosure.

[0027] Figure 9 FIG. is an illustration showing an example process, such as performed by a network entity, according to the present disclosure.

[0028] Figure 10 FIG. is an illustration showing an example process, such as performed by a UE, according to the present disclosure.

[0029] Figure 11 FIG. is an illustration of an example apparatus for wireless communication according to the present disclosure.

[0030] Figure 12 FIG. is an illustration of an example apparatus for wireless communication according to the present disclosure. DETAILED DESCRIPTION

[0031] Aspects of the present disclosure are more fully described below with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Those skilled in the art should understand that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the disclosure. For example, any number of the aspects set forth herein may be used to implement an apparatus or practice a method. In addition, the scope of the present disclosure is intended to cover such apparatus or methods implemented using other structures, functionality, or a combination of structures and functionality in addition to or different from the aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

[0032] Aspects of a telecommunications system will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated by various boxes, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements") in the accompanying drawings. These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and the design constraints imposed on the overall system.

[0033] Although terms generally associated with 5G or New Radio (NR) radio access technology (RAT) may be used herein to describe aspects, aspects of the present disclosure can be applied to other RATs, such as 3G RAT, 4G RAT, and / or post-5G (e.g., 6G) RAT.

[0034] Figure 1 FIG. is an example diagram illustrating a wireless network 100 according to the present disclosure. The wireless network 100 can be a 5G (e.g., NR) network and / or a 4G (e.g., Long-Term Evolution (LTE)) network, or can include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., Long-Term Evolution (LTE)) network, etc. The wireless network 100 can include one or more network nodes 110 (shown as network nodes 110a, network nodes 110b, network nodes 110c, and network nodes 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UEs 120a, UEs 120b, UEs 120c, UEs 120d, and UEs 120e), and / or other entities. The network nodes 110 are network nodes that communicate with the UEs 120. As shown, the network nodes 110 can include one or more network nodes. For example, the network nodes 110 can be an aggregated network node, which means that the aggregated network node is configured to utilize a radio protocol stack physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). As another example, the network nodes 110 can be a disaggregated network node (sometimes referred to as a disaggregated base station), which means that the network nodes 110 are configured to utilize a protocol stack physically or logically distributed between two or more nodes, such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs).

[0035] In some examples, network node 110 is or includes a network node (such as a RU) that communicates with UE 120 via a radio access link. In some examples, network node 110 is or includes a network node (such as a DU) that communicates with other network nodes 110 via a fronthaul link or a midhaul link. In some examples, network node 110 is or includes a network node (such as a CU) that communicates with other network nodes 110 via a midhaul link or communicates with a core network via a backhaul link. In some examples, network node 110 (such as an aggregated network node 110 or a disaggregated network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. Network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmit receive point (TRP), a DU, a RU, a CU, a mobility element of the network, a core network node, a network element, network equipment, a RAN node, or a combination thereof. In some examples, network nodes 110 may be interconnected with each other or with one or more other network nodes 110 in wireless network 100 using any suitable transport network via various types of fronthaul interfaces, midhaul interfaces, and / or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks).

[0036] In some examples, network node 110 may provide communication coverage for a specific geographical area. In the 3rd Generation Partnership Project (3GPP), depending on the context in which the term is used, the term "cell" may refer to the coverage area of network node 110 and / or the network node subsystem serving that coverage area. Network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographical area (e.g., with a radius of several kilometers) and may allow unrestricted access by UE 120 with a service subscription. A pico cell may cover a relatively small geographical area and may allow unrestricted access by UE 120 with a service subscription. A femto cell may cover a relatively small geographical area (e.g., a home) and may allow restricted access by UE 120 associated with the femto cell (e.g., UE 120 in a Closed Subscriber Group (CSG)). The network node 110 for a macro cell may be referred to as a macro network node. The network node 110 for a pico cell may be referred to as a pico network node. The network node 110 for a femto cell may be referred to as a femto network node or a home network node. In Figure 1In the example shown, network node 110a can be a macro network node for macro cell 102a, network node 110b can be a pico network node for pico cell 102b, and network node 110c can be a femto network node for femto cell 102c. A network node can support one or more (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographical area of a cell can move according to the location of a moving network node 110 (e.g., a mobile network node).

[0037] In some aspects, the term "base station" or "network node" can refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more of their components. For example, in some aspects, the "base station" or "network node" can refer to a CU, a DU, an RU, a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" can refer to a single device configured to perform one or more functions (such as those described herein in connection with network node 110). In some aspects, the term "base station" or "network node" can refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of multiple different devices (which can be located at the same geographical location or different geographical locations) can be configured to perform at least a portion of a function, or to repeat at least a portion of the function, and the term "base station" or "network node" can refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" can refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions can be instantiated on a single device. In some aspects, the term "base station" or "network node" can refer to one base station function among base station functions, rather than another base station function. In this way, a single device can include more than one base station.

[0038] Wireless network 100 can include one or more relay stations. A relay station is a network node that can receive transmissions from an upstream node (e.g., network node 110 or UE 120) and transmit the data to a downstream node (e.g., UE 120 or network node 110). A relay station can be a UE 120 that can relay transmissions for other UEs 120. In Figure 1 the example shown, network node 110d (e.g., a relay network node) can communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a and UE 120d. A network node that relays communication can be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, etc.

[0039] The wireless network 100 can be a heterogeneous network that includes different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 can have different transmission power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro network node can have a high transmission power level (e.g., 5 watts to 40 watts), while pico network nodes, femto network nodes, and relay network nodes can have lower transmission power levels (e.g., 0.1 watt to 2 watts).

[0040] The network controller 130 can be coupled to or communicate with a set of network nodes 110 and can provide coordination and control for these network nodes 110. The network controller 130 can communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link. The network nodes 110 can also communicate directly with each other or indirectly via a wireless backhaul communication link or a wired backhaul communication link. In some aspects, the network controller 130 can be a CU or a core network device, or can include a CU or a core network device.

[0041] UEs 120 can be dispersed throughout the wireless network 100, and each UE 120 can be stationary or mobile. The UE 120 can include, for example, an access terminal, a terminal, a mobile station, and / or a subscriber unit. The UE 120 can be a cellular phone (e.g., 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, a superbook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, UE functionality of a network node, and / or any other suitable device configured to communicate via a wireless or wired medium.

[0042] Some UEs 120 may be considered machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. The MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which may communicate with network nodes, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet of Things (IoT) devices and / or may be implemented as narrowband IoT (NB-IoT) devices. Some UEs 120 may be considered customer premise equipment. The UE 120 may be included inside a housing that houses components of the UE 120, such as processor components and / or memory components. In some examples, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0043] Generally, any number of radio networks 100 may be deployed in a given geographical area. Each radio network 100 may support a specific RAT and may operate on one or more frequencies. The RAT may be referred to as a radio technology, an air interface, etc. The frequency may be referred to as a carrier, a frequency channel, etc. Each frequency in a given geographical area may support a single RAT to avoid interference between radio networks of different RATs. In some cases, an NR or 5G RAT network may be deployed.

[0044] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., communicate with each other without using the network node 110 as an intermediate device). For example, the UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, or vehicle-to-pedestrian (V2P) protocol), and / or a mesh network. In such examples, the UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the network node 110.

[0045] Devices of the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. according to frequency or wavelength. For example, devices of the wireless network 100 can communicate using one or more operating frequency bands. In 5G NR, two initial operating frequency bands have been identified as frequency range designations FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). It should be understood that although a part of FR1 is greater than 6 GHz, in various documents and articles, FR1 is typically (interchangeably) referred to as the "sub-6 GHz" band. Regarding FR2, a similar naming issue sometimes occurs, which is typically (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) identified by the International Telecommunication Union (ITU) as the "millimeter wave" band.

[0046] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified operating frequency bands for these mid-band frequencies as frequency range designations FR3 (7.125 GHz - 24.25 GHz). Bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating frequency bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0047] Considering the above examples, unless otherwise specifically stated, it should be understood that if the term "sub-6 GHz" etc. is used in this article, this term can generally represent frequencies that can be below 6 GHz, can be within FR1, or can include mid-band frequencies. Additionally, unless otherwise specifically stated, it should be understood that if the term "millimeter wave" etc. is used in this article, this term can generally represent 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. It is envisioned that the frequencies included in these operating frequency bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein apply to those modified frequency ranges.

[0048] In some aspects, a UE (e.g., UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive a configuration that configures a transmission configuration indicator (TCI) state based at least in part on an aperiodic channel state information reference signal (AP-CSI-RS), where each TCI state includes a first resource that is an aperiodic tracking reference signal (AP-TRS) and a second resource that is an AP-CSI-RS. The communication manager 140 may receive first downlink control information (DCI) that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RSs each associated with a quasi-co-location (QCL) type D resource, where the QCL type D resource is a TRS or a synchronization signal block (SSB). The communication manager 140 may select one or more AP-CSI-RSs based at least in part on AP-CSI-RS measurements; transmit a report indicating the one or more AP-CSI-RSs. The communication manager 140 may receive an activation command that activates a TCI state associated with a first narrow beam, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam. The communication manager 140 may use the TCI state to transmit or receive a reference signal. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0049] In some aspects, a network entity (e.g., network node 110) may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may transmit a configuration that configures a TCI state based at least in part on an AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The communication manager 150 may transmit first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RSs each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB. The communication manager 140 may receive a report of one or more AP-CSI-RSs. The communication manager 140 may select a first AP-CSI-RS from the one or more AP-CSI-RSs, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates a first narrow beam. The communication manager 140 may transmit an activation command that activates a TCI state associated with the first narrow beam. The communication manager 140 may use the TCI state to transmit or receive a reference signal. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0050] As indicated above, Figure 1 is provided as an example. Other examples may relate toFigure 1 is different from the example described above.

[0051] Figure 2 is a diagram illustrating Example 200 of a network entity (e.g., network node 110) communicating with a UE 120 in a wireless network 100 according to the present disclosure. The network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1). The network node 110 of Example 200 includes one or more radio frequency components, such as antennas 234 and a modem 232. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0052] At network node 110, transmit processor 220 may receive data destined for UE 120 (or a set of UEs 120) from data source 212. Transmit processor 220 may select one or more modulation and coding schemes (MCSs) for UE 120 based at least in part on one or more channel quality indicators (CQIs) received from UE 120. Network node 110 may process (e.g., encode and modulate) data for UE 120 based at least in part on the MCS selected for UE 120 and may provide data symbols for UE 120. Transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling) and provide overhead symbols and control symbols. Transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signal (CRS) or demodulation reference signal (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a through 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may process the corresponding output symbol stream (e.g., for OFDM) using the corresponding modulator component to obtain an output sample stream. Each modem 232 may also process the output sample stream (e.g., convert to analog, amplify, filter, and / or up-convert) using the corresponding modulator component to obtain a downlink signal. Modems 232a through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a through 234t).

[0053] At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) may receive downlink signals from the network node 110 and / or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a through 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may condition (e.g., filter, amplify, down-convert, and / or digitize) the received signal using the corresponding demodulator component to obtain input samples. Each modem 254 may further process the input samples (e.g., for OFDM) using the demodulator component to obtain received symbols. The MIMO detector 256 may obtain the received symbols from the modems 254, may perform MIMO detection on the received symbols when applicable, and may provide the detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide the decoded data for the UE 120 to the data sink 260, and may provide the decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal received quality (RSRQ) parameters, and / or CQI parameters, etc. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0054] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0055] One or more antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) may include one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc., or may be included within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and / or one or more antenna elements coupled to one or more transmit and / or receive components (such as Figure 2 one or more components among)

[0056] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 when applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and sent to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of the antenna 252, the modem 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and / or the TX MIMO processor 266. The transceiver may be used by a processor (e.g., the controller / processor 280) and the memory 282 to perform aspects of any of the methods described herein (e.g., with reference to Figures 4 to 12 ) in any of the methods described herein.

[0057] At the network node 110, the uplink signals from the UE 120 and / or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., the demodulator component of the modem 232, shown as DEMOD), detected by the MIMO detector 236 when applicable, and further processed by the receive processor 238 to obtain the decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink communication and / or uplink communication. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of the antenna 234, the modem 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, and / or the TX MIMO processor 230. The transceiver may be used by a processor (e.g., the controller / processor 240) and the memory 242 to perform aspects of any of the methods described herein (e.g., with reference to Figures 4 to 12 ) in any of the methods described herein.

[0058] As described in more detail elsewhere herein, a controller / processor of a network entity (e.g., controller / processor 240 of network node 110), a controller / processor 280 of UE 120, and / or Figure 2 any other component of may perform one or more techniques associated with defining a TCI state based on an AP-CSI-RS ID. For example, a controller / processor 240 of network node 110, a controller / processor 280 of UE 120, and / or Figure 2 any other component of may perform or direct the operation of, for example Figure 9 process 900 of, Figure 10 process 1000 of, and / or other processes as described herein. Memories 242 and 282 may store data and program code for network node 110 and UE 120, respectively. In some examples, memories 242 and / or 282 may include non-transitory computer-readable media storing one or more instructions for wireless communication (e.g., code and / or program code). For example, when the one or more instructions are executed by one or more processors of network node 110 and / or UE 120 (e.g., directly executed, or after compilation, transformation, and / or interpretation), the one or more processors, UE 120, and / or network node 110 may be caused to perform or direct the operation of, for example Figure 9 process 900 of, Figure 10 process 1000 of, and / or other processes as described herein. In some examples, executing the instructions may include running the instructions, transforming the instructions, compiling the instructions, and / or interpreting the instructions, and so on.

[0059] In some aspects, a network entity (e.g., network node 110) includes: components for transmitting a configuration for configuring a TCI state at least partially based on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS; components for transmitting a first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB; components for receiving a report of one or more AP-CSI-RS; components for selecting a first AP-CSI-RS from the one or more AP-CSI-RS, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates a first narrow beam; components for transmitting an activation command for activating the TCI state associated with the first narrow beam; and / or components for transmitting or receiving a reference signal using the TCI state. In some aspects, the components for the network entity to perform the operations described herein may include, for example, one or more of the following: communication manager 150, transmit processor 220, TX MIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller / processor 240, memory 242, or scheduler 246.

[0060] In some aspects, a UE (e.g., UE 120) includes: components for receiving a configuration for configuring a TCI state at least partially based on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS; components for receiving a first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB; components for selecting one or more AP-CSI-RS at least partially based on AP-CSI-RS measurements; components for transmitting a report indicating the one or more AP-CSI-RS; components for receiving an activation command for activating the TCI state associated with the first narrow beam, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam; and / or components for transmitting or receiving a reference signal using the TCI state. The components for the UE to perform the operations described herein may include, for example, one or more of the following: communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0061] Although Figure 2 the boxes in Figure 2 are illustrated as separate components, the functions described above with respect to these boxes may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to the transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by, or under the control of, the controller / processor 280.

[0062] As indicated above, Figure 2 is provided as an example. Other examples may be different from the example described with respect to Figure 2 described above.

[0063] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, network nodes, network entities, mobility elements of the network, RAN nodes, core network nodes, network elements, base stations, or network equipment can be implemented in a centralized architecture or a split architecture. For example, a base station (such as a Node B (NB), evolved NB (eNB), NR base station, 5G NB, access point (AP), TRP, or cell, etc.) or one or more units (or one or more components) that perform base station functionality can be implemented as a centralized base station (also referred to as a stand-alone base station or monolithic base station) or a split base station. A "network entity" or "network node" can refer to a split base station or one or more units of a split base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0064] A centralized base station (e.g., a centralized network node) can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A split base station (e.g., a split network node) can be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, a CU can be implemented within a network node, and one or more DUs can be co-located with the CU, or alternatively, can be geographically or virtually distributed across one or more other network nodes. A DU can be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can also be implemented as a virtual unit, such as a virtual central unit (VCU), virtual distributed unit (VDU), or virtual radio unit (VRU), etc.

[0065] Base station type operations or network designs may consider the aggregation characteristics of base station functionality. For example, a disaggregated base station can be utilized in an IAB network, an open radio access network (O-RAN, such as a network configuration advocated by the O-RAN Alliance), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate the scaling of a communication system by separating base station functionality into one or more units that can be deployed separately. The disaggregated base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented virtually for at least one unit, which can achieve flexibility in network design. Each unit of the disaggregated base station can be configured for wired or wireless communication with at least one other unit of the disaggregated base station.

[0066] Figure 3 FIG. 4 is a diagram illustrating an example disaggregated base station architecture 300 according to the present disclosure. The disaggregated base station architecture 300 may include a CU 310 that can communicate directly with the core network 320 via a backhaul link, or indirectly with the core network 320 through one or more disaggregated control units (such as a near RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a service management and orchestration (SMO) framework 305, or both). The CU 310 can communicate with one or more DUs 330 via respective midhaul links (such as through an F1 interface). Each DU in the DUs 330 can communicate with one or more RUs 340 via a respective fronthaul link. Each RU in the RUs 340 can communicate with one or more UEs 120 via a respective radio frequency (RF) access link. In some specific implementations, a UE 120 can be served simultaneously by multiple RUs 340.

[0067] Each unit (including the CU 310, DU 330, RU 340) and the near RT RIC 325, non-RT RIC 315, and SMO framework 305 may include one or more interfaces or be coupled to one or more interfaces that are configured to receive or transmit signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each unit or an associated processor or controller that provides instructions to one or more communication interfaces of a corresponding unit can be configured to communicate with one or more of the other units via the transmission medium. In some examples, each unit may include a wired interface and a wireless interface, the wired interface being configured to receive signals or transmit signals to one or more of the other units via a wired transmission medium, and the wireless interface may include a receiver, a transmitter, or a transceiver (such as an RF transceiver), the wireless interface being configured to receive signals or transmit signals to one or more of the other units via a wireless transmission medium or both.

[0068] In some aspects, the CU 310 may host one or more high-layer control functions. Such control functions may include Radio Resource Control (RRC) functions, Packet Data Convergence Protocol (PDCP) functions, or Service Data Adaptation Protocol (SDAP) functions, among others. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by the CU 310. The CU 310 may be configured to handle user-plane functionality (e.g., Central Unit - User Plane (CU-UP) functionality), control-plane functionality (e.g., Central Unit - Control Plane (CU-CP) functionality), or a combination thereof. In some specific implementations, the CU 310 may be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units may communicate bidirectionally with the CU-CP units via an interface such as the E1 interface. As needed, the CU 310 may be implemented to communicate with the DU 330 for network control and signaling.

[0069] Each DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 340. In some aspects, the DU 330 may host at least part of the Radio Link Control (RLC) layer, the Medium Access Control (MAC) layer, and one or more of the higher Physical (PHY) layers, at least in part according to a functional split (such as the functional split defined by 3GPP). In some aspects, one or more of the higher PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, and modulation and demodulation, among others. In some aspects, the DU 330 may also host one or more lower PHY layers, such as those implemented by one or more modules for fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, or physical random access channel (PRACH) extraction and filtering, among others. Each layer (which may also be referred to as a module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by the DU 330 or with control functions hosted by the CU 310.

[0070] Each RU 340 can implement low-layer functionality. In some deployments, the RU 340 controlled by the DU 330 can correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing FFT, performing iFFT, digital beamforming, or PRACH extraction and filtering, etc.) based on function splitting (such as the function splitting defined by 3GPP), such as low-layer function splitting. In this architecture, each RU 340 can be operated to handle over-the-air (OTA) communication with one or more UEs 120. In some embodiments, the real-time and non-real-time aspects of the control plane communication and user plane communication with the RU 340 can be controlled by the corresponding DU 330. In some scenarios, this configuration can enable each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture (such as a vRAN architecture).

[0071] The SMO framework 305 can be configured to support the RAN deployment and orchestration of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 can be configured to support the deployment of dedicated physical resources for RAN coverage requirements, and these dedicated physical resources can be managed via an operation and maintenance interface (such as the O1 interface). For virtualized network elements, the SMO framework 305 can be configured to interact with a cloud computing platform (such as the Open Cloud (O-Cloud) platform 390) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as the O2 interface). Such virtualized network elements can include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 315, and near-RT RIC 325. In some embodiments, the SMO framework 305 can communicate with the hardware aspects of the 4G RAN (such as the Open eNB (O-eNB) 311) via the O1 interface. Additionally, in some embodiments, the SMO framework 305 can directly communicate with each RU in one or more RUs 340 via the corresponding O1 interface. The SMO framework 305 can also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305.

[0072] The non-RT RIC 315 can be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 can be coupled to or communicate with the near-RT RIC 325 (such as via the A1 interface). The near-RT RIC 325 can be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via an interface (such as via the E2 interface) through data collection and actions, which interface connects one or more CUs 310, one or more DUs 330, or both, and the O-eNB to the near-RT RIC 325.

[0073] In some embodiments, to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 can receive parameters or external enrichment information from an external server. Such information can be utilized by the near-RT RIC 325 and can be received from non-network data sources or from network functions at the SMO framework 305 or at the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 can be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 can monitor long-term trends and patterns of performance and employ an AI / ML model to perform corrective actions via the SMO framework 305 (such as reconfiguration via the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0074] As indicated above, Figure 3 is provided as an example. Other examples may be different from the examples Figure 3 described.

[0075] Figure 4 are diagrams illustrating examples 400, 410, and 420 of a CSI-RS beam management process according to the present disclosure. As Figure 4 shown, examples 400, 410, and 420 include a UE 120 communicating with a network entity (such as a network node 110) in a wireless network (such as wireless network 100). However, Figure 4 the devices shown are provided as examples, and the wireless network can support communication and beam management between other devices (such as between the UE 120 and the network node 110 or a transmit receive point (TRP), between a mobile termination node and a control node, between an integrated access and backhaul (IAB) sub-node and an IAB parent node, and / or between a scheduled node and a scheduling node). In some aspects, the UE 120 and the network node 110 can be in a connected state (such as an RRC connected state).

[0076] As Figure 4 shown, example 400 may include network node 110 (e.g., one or more network node devices such as RU, DU, and / or CU, etc.) communicating with UE 120 to perform beam management using CSI-RS. Example 400 depicts a first beam management process (e.g., P1 CSI-RS beam management). The first beam management process may be referred to as a beam selection process, an initial beam capture process, a beam scanning process, a cell search process, and / or a beam search process. As Figure 4 shown in example 400, CSI-RS may be configured to be sent from network node 110 to UE 120. CSI-RS may be configured to be periodic (e.g., using RRC signaling), semi-persistent (e.g., using MAC control element (MAC-CE) signaling), and / or aperiodic (e.g., using DCI).

[0077] The first beam management process may include network node 110 performing beam scanning on multiple transmit (Tx) beams. Network node 110 may use each transmit beam for beam management to send CSI-RS. To enable UE 120 to perform receive (Rx) beam scanning, network node may send (e.g., repeat) each CSI-RS multiple times within the same reference signal (RS) resource set using the transmit beam, such that UE 120 may sweep through receive beams in multiple transmit instances. For example, if network node 110 has a set of N transmit beams and UE 120 has a set of M receive beams, CSI-RS may be sent M times on each of the N transmit beams, such that UE 120 may receive M instances of CSI-RS per transmit beam. In other words, for each transmit beam of network node 110, UE 120 may perform beam scanning of UE 120's receive beams. Thus, the first beam management process may enable UE 120 to measure CSI-RS on different transmit beams using different receive beams to support the selection of transmit beam / receive beam beam pairs between network node 110 and UE 120. UE 120 may report measurements to network node 110 such that network node 110 can select one or more beam pairs for communication between network node 110 and UE 120. Although example 400 has been described in connection with CSI-RS, the first beam management process may also use SSB for beam management in a similar manner as described above.

[0078] As Figure 4As shown, Example 410 may include a network node 110 and a UE 120 communicating to perform beam management using CSI-RS. Example 410 depicts a second beam management process (e.g., P2 CSI-RS beam management). This second beam management process may be referred to as a beam refinement process, a network node beam refinement process, a TRP beam refinement process, and / or a transmit beam refinement process. As Figure 4 shown in Example 410, the CSI-RS may be configured to be transmitted from the network node 110 to the UE 120. The CSI-RS may be configured to be aperiodic (e.g., using DCI). The second beam management process may include the network node 110 performing beam scanning on one or more transmit beams. The one or more transmit beams may be a subset of all transmit beams associated with the network node 110 (e.g., determined at least in part based on measurements reported by the UE 120 in connection with the first beam management process). The network node 110 may transmit the CSI-RS using each of the one or more transmit beams used for beam management. The UE 120 may measure each CSI-RS using a single (e.g., the same) receive beam (e.g., determined at least in part based on measurements performed in connection with the first beam management process). The second beam management process may enable the network node 110 to select an optimal transmit beam at least in part based on the measurements of the CSI-RS reported by the UE 120 (e.g., measured by the UE 120 using a single receive beam).

[0079] As Figure 4 shown, Example 420 depicts a third beam management process (e.g., P3 CSI-RS beam management). This third beam management process may be referred to as a beam refinement process, a UE beam refinement process, and / or a receive beam refinement process. As Figure 4As shown in Example 420, one or more CSI-RS may be configured to be sent from network node 110 to UE 120. The CSI-RS may be configured to be aperiodic (e.g., using DCI). The third beam management process may include network node 110 sending one or more CSI-RS using a single transmission beam (e.g., determined at least in part based on measurements reported by UE 120 in connection with the first beam management process and / or the second beam management process). To enable UE 120 to perform receive beam scanning, the network node may send (e.g., with repetition) CSI-RS multiple times within the same RS resource set using the transmission beam, such that UE 120 may sweep through one or more receive beams in multiple transmission instances. The one or more receive beams may be a subset of all receive beams associated with UE 120 (e.g., determined at least in part based on measurements performed in connection with the first beam management process and / or the second beam management process). The third beam management process may enable UE 120 to select an optimal receive beam at least in part based on measurements made by UE 120 (e.g., measurements of CSI-RS of the transmission beam using one or more receive beams).

[0080] Network node 110 may transmit to UE 120 located within the coverage area of network node 110. Network node 110 and UE 120 may be configured for beamformed communication, where network node 110 may transmit in the direction of UE 120 using a directional network node (NN) transmission beam (e.g., NN transmission beam), and UE 120 may receive the transmission using a directional UE receive beam. Each NN transmission beam may have an associated beam ID, beam direction, beam symbol, etc. Network node 110 may transmit downlink communication via one or more NN transmission beams.

[0081] UE 120 may attempt to receive the downlink transmission via one or more UE receive beams, which may be configured with different beamforming parameters at the receive circuitry of UE 120. UE 120 may identify a particular NN transmission beam and a particular UE receive beam that provide relatively good performance (e.g., which have the best channel quality for the measured different combinations of the NN transmission beam and the UE receive beam). In some examples, UE 120 may send an indication of which NN transmission beam UE 120 identifies as the preferred NN transmission beam, and network node 110 may select the preferred NN transmission beam to transmit to UE 120. Thus, UE 120 may obtain and maintain a beam pair link (BPL) (e.g., a combination of an NN transmission beam and a UE receive beam) for downlink communication with network node 110, and may further refine and maintain the BPL according to one or more established beam refinement processes.

[0082] Downlink beams may be associated with Transmission Configuration Indicator (TCI) states. A TCI state may indicate the directionality or characteristics of the downlink beam, such as one or more Quasi-Co-Location (QCL) attributes of the downlink beam. QCL attributes may include, for example, Doppler shift, Doppler spread, average delay, delay spread, or spatial reception parameters, etc. In some examples, each NN transmit beam may be associated with an SSB, and the UE 120 may indicate the preferred NN transmit beam by transmitting an uplink transmission in the resources of the SSB associated with the preferred NN transmit beam. A particular SSB may have an associated TCI state (e.g., for an antenna port or for beamforming). In some examples, the network node 110 may indicate the downlink NN transmit beam at least partially based on the antenna port QCL attributes that may be indicated by the TCI state. For different QCL types (e.g., QCL types for different combinations of Doppler shift, Doppler spread, average delay, delay spread, or spatial reception parameters, etc.), the TCI state may be associated with a set of downlink reference signals (e.g., SSB, and aperiodic, periodic, or semi-persistent Channel State Information Reference Signals (CSI-RS)). In the case where the QCL type indicates spatial reception parameters, the QCL type may correspond to the analog reception beamforming parameters of the UE receive beam at the UE 120. Thus, the UE 120 may select the corresponding UE receive beam from the BPL set at least partially based on the NN transmit beam indicated by the network node 110 via TCI indication.

[0083] The network node 110 may maintain a set of active TCI states for downlink shared channel transmission and a set of active TCI states for downlink control channel transmission. The set of active TCI states for downlink shared channel transmission may correspond to the beams used by the network node 110 for downlink transmission on the Physical Downlink Shared Channel (PDSCH). The set of active TCI states for downlink control channel communication may correspond to the beams that the network node 110 may use for downlink transmission on the Physical Downlink Control Channel (PDCCH) or in a Control Resource Set (CORESET). The UE 120 may also maintain the set of active TCI states for receiving downlink shared channel transmission and CORESET transmission. In the case where a TCI state is activated for the UE 120, the UE 120 may have one or more antenna configurations at least partially based on the TCI state, and the UE 120 may not need to reconfigure the antenna or the antenna weighting configuration. In some examples, the set of active TCI states for the UE 120 (e.g., the active PDSCH TCI state and the active CORESET TCI state) may be configured by a configuration message (such as a Radio Resource Control (RRC) message).

[0084] Similarly, for uplink communication, the UE 120 may transmit in the direction of the network node 110 using a directional UE transmit beam, and the network node 110 may receive the transmission using a directional NN receive beam. Each UE transmit beam may have an associated beam ID, beam direction, beam symbol, etc. The UE 120 may transmit uplink communication via one or more UE transmit beams.

[0085] The network node 110 may receive the uplink transmission via one or more NN receive beams (e.g., NN receive beam). The network node 110 may identify specific UE transmit beams and specific NN receive beams that provide relatively good performance (e.g., which have the best channel quality for different measured combinations of UE transmit beam and NN receive beam). In some examples, the network node 110 may transmit an indication of which UE transmit beam the network node 110 identifies as a preferred UE transmit beam, and the network node 110 may select the preferred UE transmit beam for transmission from the UE 120. Thus, the UE 120 and the network node 110 may obtain and maintain a BPL for uplink communication (e.g., a combination of UE transmit beam and NN receive beam), and may further refine and maintain the BPL according to one or more established beam refinement procedures. Uplink beams (such as UE transmit beams or NN receive beams) may be associated with spatial relationships. The spatial relationship may indicate the directivity or characteristics of the uplink beam (similar to one or more QCL attributes), as described above.

[0086] The TCI state may include two resources (e.g., RS1, RS2), where RS1 is for QCL type A / B / C, and RS2 is for QCL type D (spatial relationship). The TCI state resource may include an SSB or a tracking reference signal (TRS). There may be a TCI state for each of the N SSBs or each of the N TRSs. There may be a one-to-one mapping between the SSB and the TRS. There may be a total of 2N TCI states.

[0087] Within each SSB / TRS (wide beam), there may be K narrow beams each represented by CSI-RS. For example, for the i-th TRS, there may be K narrow beams, represented by CSI-RS[i][k], where k = 1, 2,... K. Thus, the TCI state may be represented as (TRS[i], CSI-RS[i][k]). In total, there may be KN TCI states to define the TCI state for narrow beams, and thus the total number of TCI states may be 2N + KN = (K + 2)N. For example, if N = 12 and K = 12, the total number of TCI states may be (12 + 2) * 12 = 168 TCI states. This is much larger than the allowed 128 TCI states.

[0088] As indicated above, Figure 4 is provided as an example of a beam management procedure. Other examples of beam management procedures may differ from the example Figure 4 described. For example, UE 120 and network node 110 may perform the third beam management procedure before performing the second beam management procedure, and / or UE 120 and network node 110 may perform a similar beam management procedure to select a UE transmission beam.

[0089] Figure 5 is a diagram illustrating example 500 of a beam management procedure according to the present disclosure. Although Figure 4 example 400 of

[0090] The P1, P2, and P3 procedures are used for the beam management process. For the generally SSB-based P1 procedure, a suitable beam pair (gNB Tx beam, UE Rx beam) is determined. For the CSI-RS-based P2 procedure with 1 or 2 ports, gNB beam refinement is performed using a fixed UE beam. Beam refinement involves finding the best beam narrow beam among multiple candidate narrow beams. For the CSI-RS-based P3 procedure with 1 or 2 ports, UE beam refinement is performed using a fixed gNB beam.

[0091] The TCI state can be defined for CSI-RS in the P2 procedure such that the gNB can signal the UE the narrow beam for use in the P3 procedure and other channels. Information about the narrow beam can help the UE better perform beam management. When the P2 procedure uses aperiodic CSI-RS (AP-CSI-RS), it is difficult to define the TCI state for AP-CSI-RS without significantly increasing the total amount of TCI states (which is limited to 128). If a TCI state is defined uniquely for each narrow beam, the total amount of TCI states may significantly exceed this limit.

[0092] In a scenario where the TCI state is not defined using the P2 procedure, the UE does not know which narrow beam is used by the gNB for downlink (DL) and uplink (UL). The UE only knows the gNB beam at the SSB level or the wide beam level. Without information about the narrow beam used by the gNB, the UE cannot optimally select a beam in the P3 procedure or other beam operations. If the best beam is not selected, communication may degrade, wasting time, power, processing resources, and signaling resources.

[0093] As indicated above, Figure 5 is provided as an example. Other examples may differ from the example Figure 5is different from the example described above.

[0094] Figure 6 is a diagram illustrating Example 600 of the TCI state for AP-CSI-RS according to the present disclosure.

[0095] According to various aspects described herein, the TCI state can be defined for AP-CSI-RS in a dynamic manner at least partially based on the triggered CSI-RS (CSI-RS) and its QCL type D resource. The QCL type D resource can be a TRS (identified by a TRS identifier (ID)) or an SSB (identified by an SSB ID). A network entity (e.g., gNB) can send a configuration that configures the TCI state at least partially based on the AP-CSI-RS, where each TCI state 604 includes a resource pair having a first resource as an AP-TRS and a second resource as an AP-CSI-RS. Note that each reference resource signal, SSB, TRS, or AP-CSI-RS can be identified by a corresponding ID (such as an SSB ID, a TRS ID, or an AP-CSI-RS ID) that can be used interchangeably with the corresponding resource.

[0096] For example, {(AP-TRS[1], AP-CSI-RS ID[1]), (AP-TRS[1], AP-CSI-RS ID[2]),..., (AP-TRS[1], AP-CSI-RS ID[K])} represents K TCI states corresponding to the first P2 process, and {(AP-TRS[2], AP-CSI-RS ID[K+1]), (AP-TRS[2], AP-CSI-RS ID[K+2]),..., (AP-TRS[2], AP-CSI-RS ID[K+K])} represents K TCI states corresponding to the second P2 process. For each P2 process, a set of trigger states is defined, where each trigger state is associated with a specific SSB-ID. For the pair (AP-CSI-RS ID, SSB-ID), where the SSB-ID represents the QCL source of the AP-CSI-RS when the set of AP-CSI-RS resources for the AP-CSI-RS is triggered by DCI, the combination of the AP-CSI-RS ID and the associated QCL type D resource can uniquely indicate the first narrow beam. The network entity and the UE can use the TCI state corresponding to the narrow beam to transmit or receive reference signals. In this way, the total amount of TCI states is significantly reduced.

[0097] Example 600 shows the TCI states for AP-CSI-RS, where each TCI state 604 includes two reference signals, which are pairs of (SSB, SSB), (P-TRS, P-TRS), or (AP-TRS, AP-CSI-RS). Each P-TRS can be configured with its QCL source represented by TCI state 608 (SSB, SSB), and each AP-CSI-RS or AP-TRS can be configured with the QCL source represented by TCI state 606 (P-TRS, P-TRS). The QCL relationship can be represented by arrows, where the arrow starts from the target resource and points to the QCL resource or reference. The long dashed line represents a QCL relationship that can be a hypothesis rather than a configuration, while the short dashed line represents a QCL resource that may or may not need to be configured. Each downlink channel or signal (PDCCH, PDSCH, CSI-RS) has a QCL source represented by TCI state 604 with resources (AP-TRS, AP-CSI-RS), and this QCL source can be further QCL to P-TRS and SSB along the arrows of the QCL chain, as shown in Example 600. The uplink channel or signal can be QCL to AP-CSI-RS directly (e.g., via semi-persistent sounding reference signal (SP-SRS)) or indirectly (e.g., physical uplink shared channel (PUSCH) or physical uplink control channel (PUCCH)), and this AP-CSI-RS is further QCL to P-TRS and SSB along the arrows of the QCL chain.

[0098] Example 600 shows that each AP-CSI-RS ID[P2] can be unique within the P-TRS ID of the TCI state associated with the DCI trigger state. Each AP-CSI-RS ID and its QCL source P-TRS ID can globally and uniquely identify a narrow beam when the AP-CSI-RS is triggered by DCI. The TCI state can be defined by the AP-CSI-RS ID and thus can globally and temporarily identify a narrow beam when the AP-CSI-RS is triggered.

[0099] In the example, if N = 2 AP-TRS IDs are defined, where each AP-TRS ID is linked to one P2 process of K AP-CSI-RS IDs, the TCI state can be (AP-TRS ID: A, AP-CSI-RS ID(P2): D). For deployment, the total additional amount of the TCI state can be N × K. This assumes that there are 12 AP-CSI-RSs under one TRS / SSB wide beam. Example 602 shows that N = 2 AP-TRS IDs 610 can correspond to N SSBs 612.

[0100] The TCI states can form two subgroups: one group under the current serving SSB / TRS and another group under the candidate SSB / TRS gNB plan. There can be a handover between the two subgroups of TCI states. If the AP-TRS is not triggered (e.g., the AP-TRS is QCL-floating), the UE can obtain the TRS (P-TRS) / SSB for type A / C through the QCL relationship (physical downlink channel to (type D) AP-CSI-RS to (type A) TRS to (type C) SSB). The AP-TRS can effectively be a floating TRS following the AP-CSI-RS [P2]. When the AP-TRS is triggered, the AP-TRS can be triggered in the same way as the P-TRS which is the QCL source of the AP-CSI-RS [P2].

[0101] The UE can use the ID pair (TRS ID / SSB-ID, AP-CSI-RS ID[k]) to identify a specific narrow beam within the wide beam associated with the TRS ID / SSB-ID. When the same P2 process is triggered to different TRS ID / SSB-IDs, the UE can update the SSB-ID. It is expected that the network entity can transmit the P3 process for the UE to train the best UE beam for the selected set of TCI states (each TCI state is a gNB narrow beam). The UE can obtain the best UE beam for each of the trained TCI states. Based on the above understanding, when the network entity uses the TCI states defined above to signal the QCL relationship for a specific signal or channel to the UE, the UE can select the corresponding best UE beam to receive or transmit the reference signal or other signals for communication. When the network entity uses DCI to trigger the AP-CSI-RS resource set, the DCI can also effectively trigger the QCL relationship between the AP-CSI-RS ID and another TCI state with a QCL type D resource, and this QCL type D resource is the TRS with a QCL type D resource associated with the SSB ID (TRS QCL to SSB).

[0102] By defining the TCI states at least partially based on the AP-CSI-RS ID, the amount of TCI states required to signal the narrow beam is reduced or minimized, which can reduce the signaling overhead and resources. By defining the TCI states in this way, the identification of the narrow beam can be more accurate (for more accurate beam management) because the UE knows which narrow beam to use.

[0103] Each AP-CSI-RS ID[P2] can be unique within the P-TRS ID of the TCI associated with the DCI-triggered state. Each AP-CSI-RS ID and its associated QCL type D resources (e.g., S SB ID, TRS ID, P-TRS ID) can globally and uniquely identify a narrow beam when it is triggered by DCI. The TCI state can be defined based on the AP-CSI-RS ID to globally and temporarily identify a narrow beam when the AP-CSI-RS resource set for the AP-CSI-RS ID is triggered by DCI.

[0104] As indicated above, Figure 6 is provided as an example. Other examples may be different from the example Figure 6 described.

[0105] Figure 7 is a diagram illustrating Example 700 associated with defining the TCI state based on the AP-CSI-RS ID according to the present disclosure. As Figure 7 shown, a network entity 710 (e.g., network node 110) and a UE 720 (e.g., UE 120) can communicate with each other via a wireless network (e.g., wireless network 100).

[0106] As indicated by reference numeral 725, the network entity 710 can send a configuration that configures the TCI state at least partially based on the AP-CSI-RS ID. As indicated by reference numeral 730, the network entity 710 can send a DCI that triggers an AP-CSI-RS resource set, which includes AP-CSI-RS IDs each associated with a QCL type D resource of the AP-CSI-RS. The QCL type D resource can be a TRS or an SSB. The combination of the AP-CSI-RS and the associated QCL type D resource can uniquely indicate a narrow beam.

[0107] The UE 720 can measure the AP-CSI-RS as part of a P2 (beam refinement) process to select a top beam candidate. As indicated by reference numeral 735, the UE 720 can select the top AP-CSI-RS at least partially based on the measurement (e.g., the highest layer 1 (L1) RSRP measurement). As indicated by reference numeral 740, the UE 720 can send a report of the top AP-CSI-RS.

[0108] The network entity 710 may select an AP-CSI-RS from the top AP-CSI-RSs reported by the UE 720. The network entity 710 may select the AP-CSI-RS at least partially based on channel conditions, traffic conditions, beam information, and / or capability information. The network entity 710 may select the AP-CSI-RS ID corresponding to the best (e.g., highest) RSRP to determine the TCI state to be activated, where the TCI state is defined by the AP-CSI-RS ID. As indicated by reference numeral 745, the network entity 710 may send an activation command to activate the TCI state. In some aspects, the network entity 710 may use a combination of the AP-CSI-RS (triggered by its AP-CSI-RS resource set) and its associated QCL type D resource (TRS or SSB) to select a narrow beam. The narrow beam may correspond to a TCI state that can be identified by a pair of the AP-CSI-RS and the TRS.

[0109] The UE 720 may activate the TCI state associated with the selected narrow beam, where the selected narrow beam is associated with the triggered AP-CSI-RS. For the transmission of a reference signal (e.g., SRS), the UE 720 may select a transmission beam that matches the receiving beam of the network entity 710. For the reception of a reference signal (e.g., receiving CSI-RS), the UE 720 may select a receiving beam that matches the transmission beam of the network entity 710. As indicated by reference numeral 750, the network entity 710 and the UE 720 may use the narrow beam, or more specifically, use the TCI state corresponding to the narrow beam to transmit or receive a reference signal. By defining the TCI state based on the AP-CSI-RS ID, the amount of TCI states may not exceed the specified maximum amount of TCI states (e.g., 128 TCI states). As a result, when selecting a beam associated with beam refinement (e.g., P2 process, P3 process), processing resources and signaling resources may be saved.

[0110] As indicated above, Figure 7 is provided as an example. Other examples may be different from the example Figure 7 described.

[0111] Figure 8 is a diagram illustrating Example 800 of beam selection with two resource sets according to the present disclosure.

[0112] The AP-CSI-RS[P2] triggered by DCI can be used as a QCL resource for other channels / signals after the DCI trigger. When the AP-CSI-RS ID is triggered, this can be instantaneous. In some aspects, when the same AP-CSI-RS[P2] is triggered again, the AP-CSI-RS can be associated with the same SSB / TRS. Thus, the same AP-CSI-RS ID can correspond to the same narrow beam. Alternatively, in some aspects, when the same AP-CSI-RS[P2] is triggered again, the AP-CSI-RS can be associated with a different SSB / TRS. Thus, the same AP-CSI-RS ID can represent different narrow beams. This change in the narrow beam for the same AP-CSI-RS ID is instantaneous when the triggered AP-CSI-RS is received by the UE. To address this issue associated with this instantaneous action time of the QCL represented by the AP-CSI-RS, two P2 procedures can be used. One P2 procedure can be used to indicate the narrow beam for the current service (serving P2). Another P2 procedure can be used to move from one SSB / TRS region to another SSB / TRS region (candidate P2 or "Cand.P2"). In this way, when the network entity attempts a new narrow beam in a new SSB / TRS region other than the current serving SSB / TRS region, the beam indication of the serving P2 will not be affected. The operation involving two P2 procedures can be referred to as the "ping-pong operation of two P2 resource sets".

[0113] Example 800 shows a first P2 resource set 802 for the current serving SSB (serving P2, second region), and a second P2 resource set 804 (candidate P2). When the UE moves to the edge of the current SSB region, the DCI can trigger the candidate P2 to a new SSB region (region 3). Once the new region is verified (the P3 / CSI-RS process can be followed), the network entity can send a MAC CE to switch the UE narrow beam to one of the P2 beams within region 3. The AP-CSI-RS ID[P2] and the triggered SSB-ID can globally and uniquely identify the narrow beam.

[0114] In example 800, there are 5 CSI-RSs within one P2 (for one SSB), under one P2, i.e., P2-1, the IDs = {1, 2, 3, 4, 5}, and under the second P2, i.e., P2-2, the IDs = {6, 7, 8, 9, 10}. There can be two TRSs (TRS-1, TRS-2) and 10 TCI states, 5 TCI states for each P2: for P2-1, 5 TCI states, i.e., TRS-1, CSI-RS ID[i], i = 1, …, 5, and for P2-2, 5 TCI states, i.e., TRS-1, CSI-RS ID[i], i = 6, …, 10.

[0115] As indicated above, Figure 8 is provided as an example. Other examples may be different from the example Figure 8 described above.

[0116] Figure 9 is a diagram illustrating an example process 900 that may be performed by a network entity, such as according to the present disclosure. The example process 900 is an example of operations performed by a network entity (e.g., network node 110, network entity 710) associated with defining a TCI state based on an AP-CSI-RS ID.

[0117] As Figure 9 shown, in some aspects, process 900 may include: sending a configuration that configures a TCI state based at least in part on an AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS (block 910). For example, a network entity (e.g., using Figure 11 the sending component 1104 and / or the communication manager 1106 depicted in) may send a configuration that configures a TCI state based at least in part on an AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS, as described above.

[0118] As Figure 9 further shown, in some aspects, process 900 may include: sending a first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB (block 920). For example, a network entity (e.g., using Figure 11 the sending component 1104 and / or the communication manager 1106 depicted in) may send a first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB, as described above.

[0119] As Figure 9 further shown, in some aspects, process 900 may include: receiving a report of one or more AP-CSI-RS (block 930). For example, a network entity (e.g., using Figure 11 the receiving component 1102 and / or the communication manager 1106 depicted in) may receive a report of one or more AP-CSI-RS, as described above.

[0120] As Figure 9As further shown, in some aspects, process 900 may include: selecting a first AP-CSI-RS from one or more AP-CSI-RSs, wherein the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam (block 940). For example, a network entity (e.g., using Figure 11 the communication manager 1106 depicted in

[0121] As Figure 9 As further shown, in some aspects, process 900 may include: sending an activation command to activate the TCI state associated with the first narrow beam (block 950). For example, a network entity (e.g., using Figure 11 the transmission component 1104 and / or the communication manager 1106 depicted in

[0122] As Figure 9 As further shown, in some aspects, process 900 may include: using the TCI state to transmit or receive a reference signal (block 960). For example, a network entity (e.g., using Figure 11 depicted in Figure 11 the transmission component 1104 and / or the communication manager 1106 depicted in

[0123] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0124] In a first aspect, process 900 includes: sending a second DCI that triggers an AP-CSI-RS resource set, wherein the second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and the second AP-CSI-RS is associated with the first associated QCL type D resource; and using the first narrow beam to transmit or receive a second reference signal.

[0125] In a second aspect, either alone or in combination with the first aspect, process 900 includes: transmitting a second DCI that triggers an AP-CSI-RS resource set, where a second AP-CSI-RS associated with the second DCI and a first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and the second AP-CSI-RS is associated with a second associated QCL type D resource that is different from a first associated QCL type D resource; and transmitting or receiving a second reference signal using a second narrow beam that is different from the first narrow beam.

[0126] In some aspects, at least partially based on the AP-TRS associated with the TRS being transmitted and being configured with a QCL type D resource and a QCL type A resource, the TRS is at least partially based on the QCL type D resource and the QCL type A resource configured for the AP-TRS.

[0127] In some aspects, at least partially based on the AP-TRS associated with the TRS being transmitted and not being configured with a QCL type D resource and a QCL type A resource, the TRS (or AP-TRS) is at least partially based on a first associated QCL type D resource of the AP-CSI-RS and a first associated QCL type A resource of the AP-CSI-RS.

[0128] In some aspects, at least partially based on the AP-TRS associated with the TRS being transmitted and not being configured with a QCL type D resource, the TRS (or AP-TRS) is at least partially based on a first associated QCL type D resource of the AP-CSI-RS and a first associated QCL type A resource of the AP-CSI-RS.

[0129] Although Figure 9 illustrates example blocks of process 900, in some aspects, process 900 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner compared to those depicted in Figure 9 Two or more of the blocks of process 900 may be performed in parallel, additionally or alternatively.

[0130] Figure 10 is a diagram illustrating an example process 1000, such as performed by a UE, according to the present disclosure. Example process 1000 is an example of operations performed by a UE (e.g., UE 120, UE 720) associated with indicating a TCI state based on an AP-CSI-RS.

[0131] As Figure 10As shown, in some aspects, process 1000 may include: receiving a configuration that configures TCI states at least in part based on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS (block 1010). For example, a UE (e.g., using Figure 12 the receiving component 1202 and / or the communication manager 1206 depicted in

[0132] As Figure 10 further shown, in some aspects, process 1000 may include: receiving a first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB (block 1020). For example, a UE (e.g., using Figure 12 the receiving component 1202 and / or the communication manager 1206 depicted in

[0133] As Figure 10 further shown, in some aspects, process 1000 may include: selecting one or more AP-CSI-RS at least in part based on AP-CSI-RS measurements (block 1030). For example, a UE (e.g., using Figure 12 the communication manager 1206 depicted in

[0134] As Figure 10 further shown, in some aspects, process 1000 may include: sending a report indicating one or more AP-CSI-RS (block 1040). For example, a UE (e.g., using Figure 12 the sending component 1204 and / or the communication manager 1206 depicted in

[0135] As Figure 10As further shown, in some aspects, process 1000 may include: receiving an activation command to activate a TCI state associated with a first narrow beam, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam (block 1050). For example, a UE (e.g., using Figure 12 the receiving component 1202 and / or the communication manager 1206 depicted in

[0136] As Figure 10 further shown, in some aspects, process 1000 may include: using the TCI state to transmit or receive a reference signal (block 1060). For example, a UE (e.g., using Figure 12 the transmitting component 1204 and / or the communication manager 1206 depicted in

[0137] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0138] In a first aspect, process 1000 includes: receiving a second DCI that triggers an AP-CSI-RS resource set, where the second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and the second AP-CSI-RS is associated with the first associated QCL type D resource; and using the first narrow beam to transmit or receive a second reference signal.

[0139] In a second aspect, either alone or in combination with the first aspect, process 1000 includes: receiving a second DCI that triggers an AP-CSI-RS resource set, where the second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and the second AP-CSI-RS is associated with a second associated QCL type D resource that is different from the first associated QCL type D resource; and using a second narrow beam that is different from the first narrow beam to transmit or receive a second reference signal.

[0140] In a third aspect, either alone or in combination with one or more of the first and second aspects, transmitting the reference signal includes: selecting a transmit beam that matches the receive beam of the network entity.

[0141] In a fourth aspect, alone or in combination with one or more of the first to third aspects, receiving the reference signal includes: selecting a receive beam that matches a transmit beam of the network entity.

[0142] although Figure 10 Example blocks of process 1000 are shown, but in some aspects, process 1000 may include Figure 10 The blocks depicted may be additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted. Additionally or alternatively, two or more of the blocks of process 1000 may be performed in parallel.

[0143] Figure 11 1 is a diagram of an example apparatus 1100 for wireless communication according to the present disclosure. Apparatus 1100 may be a network entity, or a network entity may include apparatus 1100. In some aspects, apparatus 1100 includes a receiving component 1102, a sending component 1104, and / or a communication manager 1106, which may communicate with each other (e.g., via one or more buses and / or one or more other components). In some aspects, communication manager 1106 is a communication manager that is configured to communicate with one another. Figure 1 The communication manager 1106. As shown, the device 1100 can use a receiving component 1102 and a sending component 1104 to communicate with another device 1108, such as a UE or a network node (such as a CU, DU, RU or base station).

[0144] In some aspects, the apparatus 1100 may be configured to perform Figures 1 to 8 Additionally or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as Figure 9 The process 900. In some aspects, Figure 11 The device 1100 and / or one or more components shown may include a combination of Figure 2 Additionally or alternatively, Figure 11 One or more of the components shown may be combined with Figure 2 Additionally or alternatively, one or more components in the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes that are stored in a non-transitory computer-readable medium and can be executed by a controller or processor to perform the function or operation of the component.

[0145] The receiving component 1102 may receive communications from the device 1108, such as reference signals, control information, data communications, or combinations thereof. The receiving component 1102 may provide the received communications to one or more other components of the device 1100. In some aspects, the receiving component 1102 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.), and may provide the processed signals to the one or more other components of the device 1100. In some aspects, the receiving component 1102 may include one or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memories, or combinations thereof of the network entity described in conjunction with Figure 2 A description of one or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memories, or combinations thereof of the network entity.

[0146] The transmitting component 1104 may send communications to the device 1108, such as reference signals, control information, data communications, or combinations thereof. In some aspects, one or more other components of the device 1100 may generate communications and may provide the generated communications to the transmitting component 1104 for transmission to the device 1108. In some aspects, the transmitting component 1104 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.), and may send the processed signals to the device 1108. In some aspects, the transmitting component 1104 may include one or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the network entity described in conjunction with Figure 2 A description of one or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the network entity. In some aspects, the transmitting component 1104 may be co-located with the receiving component 1102 in a transceiver.

[0147] The transmitting component 1104 may send a configuration for configuring the TCI state based at least in part on the AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The transmitting component 1104 may send a first DCI that triggers a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or an SSB. The receiving component 1102 may receive a report of one or more AP-CSI-RS. The communication manager 1106 may select a first AP-CSI-RS from the one or more AP-CSI-RS, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates a first narrow beam. The transmitting component 1104 may send an activation command to activate the TCI state associated with the first narrow beam. The transmitting component 1104 may use the TCI state to send or receive reference signals.

[0148] The transmitting component 1104 may transmit a second DCI that triggers an AP-CSI-RS resource set, where a second AP-CSI-RS associated with the second DCI and a first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and the second AP-CSI-RS is associated with a first associated QCL type D resource.

[0149] The transmitting component 1104 may transmit or receive a second reference signal using a first narrow beam.

[0150] The transmitting component 1104 may transmit a second DCI that triggers an AP-CSI-RS resource set, where a second AP-CSI-RS associated with the second DCI and a first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and the second AP-CSI-RS is associated with a second associated QCL type D resource that is different from the first associated QCL type D resource.

[0151] The transmitting component 1104 may transmit or receive a second reference signal using a second narrow beam that is different from the first narrow beam.

[0152] Figure 11 The number and arrangement of the illustrated components are provided as an example. In fact, there may be additional components, fewer components, different components, or components arranged in a different manner compared to Figure 11 the components shown. Additionally, Figure 11 two or more of the illustrated components may be implemented within a single component, or Figure 11 a single illustrated component may be implemented as multiple distributed components. Additionally or alternatively, Figure 11 a set of the illustrated component(s) may perform one or more functions described as being performed by Figure 11 another set of the illustrated components.

[0153] Figure 12 is a diagram of an example apparatus 1200 for wireless communication in accordance with the present disclosure. The apparatus 1200 may be a UE, or a UE may include the apparatus 1200. In some aspects, the apparatus 1200 includes a receiving component 1202, a transmitting component 1204, and / or a communication manager 1206, which may communicate with each other (e.g., via one or more buses and / or one or more other components). In some aspects, the communication manager 1206 is the communication manager 140 described in Figure 1 connection with. As shown, the apparatus 1200 may communicate with another apparatus 1208 (such as a UE or a network node (such as a CU, DU, RU, or base station)) using the receiving component 1202 and the transmitting component 1204.

[0154] In some aspects, apparatus 1200 may be configured to perform one or more operations described herein in connection with Figures 1 to 8 Additionally or alternatively, apparatus 1200 may be configured to perform one or more processes described herein, such as Figure 10 process 1000. In some aspects, Figure 12 apparatus 1200 and / or one or more components shown may include one or more components of a UE described in connection with Figure 2 Additionally or alternatively, Figure 12 one or more components shown may be implemented within one or more components described in connection with Figure 2 Additionally or alternatively, one or more components in a set of components may be at least partially implemented as software stored in a memory. For example, a component (or a part of a component) may be implemented as instructions or code that is stored in a non-transitory computer-readable medium and is executable by a controller or processor to perform the functions or operations of the component.

[0155] Receiving component 1202 may receive communications from apparatus 1208, such as reference signals, control information, data communications, or a combination thereof. Receiving component 1202 may provide the received communications to one or more other components of apparatus 1200. In some aspects, receiving component 1202 may perform signal processing (such as filtering, amplifying, demodulating, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalizing, interference cancellation, or decoding, etc.) on the received communications, and may provide the processed signals to the one or more other components of apparatus 1200. In some aspects, receiving component 1202 may include one or more antennas, modems, demodulators, MIMO detectors, receiving processors, controller / processors, memories, or a combination thereof of a UE described in connection with Figure 2

[0156] Transmitting component 1204 may transmit communications to apparatus 1208, such as reference signals, control information, data communications, or a combination thereof. In some aspects, one or more other components of apparatus 1200 may generate communications and may provide the generated communications to transmitting component 1204 for transmission to apparatus 1208. In some aspects, transmitting component 1204 may perform signal processing (such as filtering, amplifying, modulating, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications, and may transmit the processed signals to apparatus 1208. In some aspects, transmitting component 1204 may include one or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controller / processors, memories, or a combination thereof of a UE described in connection with Figure 2 In some aspects, transmitting component 1204 may be co-located with receiving component 1202 in a transceiver.​

[0157] The receiving component 1202 may receive a configuration for configuring TCI states based at least in part on AP-CSI-RS, where each TCI state includes a first resource that is an AP-TRS and a second resource that is an AP-CSI-RS. The receiving component 1202 may receive a first DCI that triggers a first set of AP-CSI-RS resources, where the first set of AP-CSI-RS resources includes AP-CSI-RS each associated with a QCL type D resource, where the QCL type D resource is a TRS or a synchronization signal block (SSB). The communication manager 1206 may select one or more AP-CSI-RS at least in part based on AP-CSI-RS measurements. The transmitting component 1204 may transmit a report indicating the one or more AP-CSI-RS. The receiving component 1202 may receive an activation command that activates a TCI state associated with a first narrow beam, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam. The transmitting component 1204 may use the TCI state to transmit or receive a reference signal.

[0158] The receiving component 1202 may receive a second DCI that triggers a set of AP-CSI-RS resources, where the second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and the second AP-CSI-RS is associated with the first associated QCL type D resource.

[0159] The transmitting component 1204 may use the first narrow beam to transmit or receive a second reference signal.

[0160] The receiving component 1202 may receive a second DCI that triggers a set of AP-CSI-RS resources, where the second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and the second AP-CSI-RS is associated with a second associated QCL type D resource that is different from the first associated QCL type D resource.

[0161] The transmitting component 1204 may use a second narrow beam that is different from the first narrow beam to transmit or receive a second reference signal.

[0162] Figure 12 The number and arrangement of the components shown are provided as an example. In fact, there may be additional components, fewer components, different components, or components arranged in a different manner compared to Figure 12 those shown. Additionally, Figure 12 two or more of the components shown may be implemented within a single component, or Figure 12The individual components shown may be implemented as multiple distributed components. Additionally or alternatively, Figure 12 a set of the (one or more) components shown may perform one or more functions described as being performed by Figure 12 another set of the components shown.

[0163] An overview of some aspects of the present disclosure is provided below:

[0164] Aspect 1: A method of wireless communication performed by a network entity, the method comprising: sending a configuration for configuring a transmission configuration indicator (TCI) state based at least in part on an aperiodic channel state information reference signal (AP-CSI-RS), wherein each TCI state includes a first resource as an aperiodic tracking reference signal (AP-TRS) and a second resource as an AP-CSI-RS; sending first downlink control information (DCI) triggering a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a quasi-co-location (QCL) type D resource, wherein the QCL type D resource is a TRS or a synchronization signal block (SSB); receiving a report of one or more AP-CSI-RS; selecting a first AP-CSI-RS from the one or more AP-CSI-RS, wherein a combination of the first AP-CSI-RS and a first associated QCL type D resource uniquely indicates a first narrow beam; sending an activation command activating the TCI state associated with the first narrow beam; and using the TCI state to send or receive a reference signal.

[0165] Aspect 2: The method according to aspect 1, wherein the TRS is at least partially based on the QCL type D resource and the QCL type A resource configured for the AP-TRS, based at least in part on the AP-TRS associated with the TRS being sent and configured with the QCL type D resource and the QCL type A resource.

[0166] Aspect 3: The method according to aspect 1, wherein the TRS is at least partially based on the first associated QCL type D resource of the AP-CSI-RS and the first associated QCL type A resource of the AP-CSI-RS, based at least in part on the AP-TRS associated with the TRS being sent and not configured with the QCL type D resource and the QCL type A resource.

[0167] Aspect 4: The method according to aspect 1, wherein the TRS is at least partially based on the first associated QCL type D resource of the AP-CSI-RS and the first associated QCL type A resource of the AP-CSI-RS, at least partially based on the AP-TRS associated with the TRS not being sent and not being configured with QCL type D resources.

[0168] Aspect 5: The method according to any one of aspects 1 to 4, the method further comprising: sending a second DCI triggering the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with the first associated QCL type D resource; and using the first narrow beam to send or receive a second reference signal.

[0169] Aspect 6: The method according to any one of aspects 1 to 4, the method further comprising: sending a second DCI triggering the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with a second associated QCL type D resource different from the first associated QCL type D resource; and using a second narrow beam different from the first narrow beam to send or receive a second reference signal.

[0170] Aspect 7: A method of wireless communication performed by a user equipment (UE), the method comprising: receiving a configuration for configuring a transmission configuration indicator (TCI) state based at least in part on an aperiodic channel state information reference signal (AP-CSI-RS), wherein each TCI state includes a first resource as an aperiodic tracking reference signal (AP-TRS) and a second resource as an AP-CSI-RS; receiving a first downlink control information (DCI) triggering a first AP-CSI-RS resource set, the first AP-CSI-RS resource set including AP-CSI-RSs each associated with a quasi-co-location (QCL) type D resource, wherein the QCL type D resource is a TRS or a synchronization signal block (SSB); selecting one or more AP-CSI-RSs at least in part based on AP-CSI-RS measurements; sending a report indicating the one or more AP-CSI-RSs; receiving an activation command activating a TCI state associated with a first narrow beam, wherein a combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam; and using the TCI state to send or receive a reference signal.

[0171] Aspect 8: The method according to aspect 7, the method further comprising: receiving a second DCI triggering the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with the first associated QCL type D resource; and transmitting or receiving a second reference signal using the first narrow beam.

[0172] Aspect 9: The method according to aspect 7, the method further comprising: receiving a second DCI triggering the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with a second associated QCL type D resource different from the first associated QCL type D resource; and transmitting or receiving a second reference signal using a second narrow beam different from the first narrow beam.

[0173] Aspect 10: The method according to any one of aspects 7 to 9, wherein transmitting the reference signal comprises: selecting a transmission beam that matches a receiving beam of a network entity.

[0174] Aspect 11: The method according to any one of aspects 7 to 10, wherein receiving the reference signal comprises: selecting a receiving beam that matches a transmission beam of a network entity.

[0175] Aspect 12: An apparatus for wireless communication at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of aspects 1 to 11.

[0176] Aspect 13: A device for wireless communication, the device comprising: a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 1 to 11.

[0177] Aspect 14: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 1 to 11.

[0178] Aspect 15: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the method according to one or more of Aspects 1 to 11.

[0179] Aspect 16: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method according to one or more of Aspects 1 to 11.

[0180] Although the foregoing disclosure provides illustration and description, it is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in accordance with the above disclosure, or may be obtained from practice of these aspects.

[0181] As used herein, the term "component" is intended to be broadly construed as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, "software" shall be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes, and / or functions, etc. As used herein, "processor" is implemented in hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware and / or combinations of hardware and software. The actual specific control hardware or software code used to implement these systems and / or methods does not limit the aspects. Accordingly, the operation and behavior of the systems and / or methods are not described herein with reference to specific software code, as those skilled in the art will understand that the software and hardware can be designed at least in part based on the description herein to implement the systems and / or methods.

[0182] As used herein, depending on the context, "meeting a threshold" may mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0183] Although specific combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. Many of these features may be combined in ways not specifically recited in the claims and / or not disclosed in the specification. The disclosure of the various aspects includes each dependent claim in combination with every other claim in the set of claims. As used herein, the phrase referring to a list of items "at least one of" means any combination of these items (which includes a single member). By way of example, "at least one of a, b, or c" is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination of multiple identical elements (e.g., a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c).

[0184] Any element, act, or instruction used herein should not be construed as critical or essential unless explicitly described as such. Further, as used herein, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Further, as used herein, the article "the" is intended to include one or more of the items mentioned in connection with the article "the" and may be used interchangeably with "one or more." Further, as used herein, the terms "set" and "group" are intended to include one or more items and may be used interchangeably with "one or more." If only intending to refer to a single item, the phrase "only one" or similar language is used. Further, as used herein, the terms "has," "owns," "possesses," etc. are intended to be open-ended terms that do not limit the elements they modify (e.g., an element that "has" A may also have B). Further, the phrase "based on" is intended to mean "at least partially based on" unless otherwise explicitly stated. Further, as used herein, the term "or" when used in a series is intended to be open-ended and may be used interchangeably with "and / or" unless otherwise explicitly stated (e.g., if used in conjunction with "either" or "only one").

Claims

1. A network entity for wireless communication, the network entity comprising: a memory; and one or more processors coupled to the memory, the memory including instructions executable by the one or more processors to cause the network entity to perform the following operations: transmit a configuration for configuring a transmission configuration indicator (TCI) state based at least in part on an aperiodic channel state information reference signal (AP-CSI-RS), wherein each TCI state includes a first resource as an aperiodic tracking reference signal (AP-TRS) and a second resource as an AP-CSI-RS; transmit first downlink control information (DCI) triggering a first set of AP-CSI-RS resources, the first set of AP-CSI-RS resources including AP-CSI-RS each associated with a quasi-co-location (QCL) type D resource, wherein the QCL type D resource is a TRS or a synchronization signal block (SSB); receive a report of one or more AP-CSI-RS; select a first AP-CSI-RS from the one or more AP-CSI-RS, wherein a combination of the first AP-CSI-RS and a first associated QCL type D resource uniquely indicates a first narrow beam; transmit an activation command activating the TCI state associated with the first narrow beam; and use the TCI state to transmit or receive a reference signal.

2. The network entity according to claim 1, wherein the TRS is at least partially based on the QCL type D resource and the QCL type A resource configured for the AP-TRS, based at least in part on the AP-TRS associated with the TRS being transmitted and configured with the QCL type D resource and the QCL type A resource.

3. The network entity according to claim 1, wherein the TRS is at least partially based on the first associated QCL type D resource of the AP-CSI-RS and the first associated QCL type A resource of the AP-CSI-RS, based at least in part on the AP-TRS associated with the TRS being transmitted and not configured with the QCL type D resource and the QCL type A resource.

4. The network entity according to claim 1, wherein the TRS is at least partially based on the first associated QCL type D resource of the AP-CSI-RS and the first associated QCL type A resource of the AP-CSI-RS, based at least in part on the AP-TRS associated with the TRS not being transmitted and not configured with the QCL type D resource.

5. The network entity according to claim 1, wherein the memory further includes instructions executable by the one or more processors to cause the network entity to perform the following operations: Transmit a second DCI that triggers the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with a first associated QCL type D resource; and Transmit or receive a second reference signal using the first narrow beam.

6. The network entity according to claim 1, wherein the memory further comprises instructions executable by the one or more processors to cause the network entity to perform the following operations: Transmit a second DCI that triggers the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with a second associated QCL type D resource different from the first associated QCL type D resource; and Transmit or receive a second reference signal using a second narrow beam different from the first narrow beam.

7. A user equipment (UE) for wireless communication, the user equipment (UE) comprising: A memory; And One or more processors coupled to the memory, the memory comprising instructions executable by the one or more processors to cause the UE to perform the following operations: Receive a configuration that configures a transmit configuration indicator (TCI) state at least partially based on an aperiodic channel state information reference signal (AP-CSI-RS), wherein each TCI state includes a first resource as an aperiodic tracking reference signal (AP-TRS) and a second resource as an AP-CSI-RS; Receive a first downlink control information (DCI) that triggers a first AP-CSI-RS resource set, the first AP-CSI-RS resource set including AP-CSI-RS each associated with a quasi-co-location (QCL) type D resource, wherein the QCL type D resource is a TRS or a synchronization signal block (SSB); Select one or more AP-CSI-RS at least partially based on AP-CSI-RS measurements; Transmit a report indicating the one or more AP-CSI-RS; Receive an activation command that activates a TCI state associated with a first narrow beam, wherein a combination of a first AP-CSI-RS and a first associated QCL type D resource uniquely indicates the first narrow beam; and Transmit or receive a reference signal using the TCI state.

8. The UE according to claim 7, wherein the memory further comprises instructions executable by the one or more processors to cause the UE to perform the following operations: Receive a second DCI that triggers the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with a first associated QCL type D resource; and Transmit or receive a second reference signal using the first narrow beam.

9. The UE according to claim 7, wherein the memory further comprises instructions executable by the one or more processors to cause the UE to perform the following operations: Receive a second DCI that triggers the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with a second associated QCL type D resource different from the first associated QCL type D resource; and Transmit or receive a second reference signal using a second narrow beam different from the first narrow beam.

10. The UE according to claim 7, wherein the memory further comprises instructions executable by the one or more processors to cause the UE to select a transmit beam that matches a receive beam of a network entity.

11. The UE according to claim 7, wherein the memory further comprises instructions executable by the one or more processors to cause the UE to select a receive beam that matches a transmit beam of a network entity.

12. A method of wireless communication performed by a network entity, the method comprising: Transmit a configuration that configures a transmit configuration indicator (TCI) state at least partially based on an aperiodic channel state information reference signal (AP-CSI-RS), wherein each TCI state includes a first resource having an aperiodic tracking reference signal (AP-TRS) and a second resource having an AP-CSI-RS; Transmit a first downlink control information (DCI) that triggers a first AP-CSI-RS resource set, the first AP-CSI-RS resource set including AP-CSI-RS each associated with a quasi-co-location (QCL) type D resource, wherein the QCL type D resource includes a TRS or a synchronization signal block (SSB); Receive a report of one or more AP-CSI-RS; Select a first AP-CSI-RS from the one or more AP-CSI-RS, wherein a combination of the first AP-CSI-RS and a first associated QCL type D resource uniquely indicates a first narrow beam; Transmit an activation command that activates a TCI state associated with the first narrow beam; And Transmit or receive a reference signal using the TCI state.

13. The method according to claim 12, wherein at least in part based on an AP-TRS associated with the TRS being transmitted and being configured with QCL type D resources and QCL type A resources, the TRS is at least in part based on the QCL type D resources and the QCL type A resources configured for the AP-TRS.

14. The method according to claim 12, wherein at least in part based on an AP-TRS associated with the TRS being transmitted and not being configured with QCL type D resources and QCL type A resources, the TRS is at least in part based on the first associated QCL type D resources of the AP-CSI-RS and the first associated QCL type A resources of the AP-CSI-RS.

15. The method according to claim 12, wherein at least in part based on an AP-TRS associated with the TRS not being transmitted and not being configured with QCL type D resources, the TRS is at least in part based on the first associated QCL type D resources of the AP-CSI-RS and the first associated QCL type A resources of the AP-CSI-RS.

16. The method according to claim 12, the method further comprising: transmitting a second DCI triggering the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with the first associated QCL type D resources; and using the first narrow beam to transmit or receive a second reference signal.

17. The method according to claim 12, the method further comprising: transmitting a second DCI triggering the AP-CSI-RS resource set, wherein a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and wherein the second AP-CSI-RS is associated with second associated QCL type D resources different from the first associated QCL type D resources; and using a second narrow beam different from the first narrow beam to transmit or receive a second reference signal.

18. A method of wireless communication performed by a user equipment (UE), the method comprising: receiving a configuration for configuring a transmission configuration indicator (TCI) state based at least in part on an aperiodic channel state information reference signal (AP-CSI-RS), wherein each TCI state includes a first resource as an aperiodic tracking reference signal (AP-TRS) and a second resource as an AP-CSI-RS; Receive first downlink control information (DCI) triggering a first AP-CSI-RS resource set, the first AP-CSI-RS resource set including AP-CSI-RSs each associated with a quasi-co-location (QCL) type D resource, where the QCL type D resource is a TRS or a synchronization signal block (SSB); Select one or more AP-CSI-RSs at least partially based on AP-CSI-RS measurements; Transmit a report indicating the one or more AP-CSI-RSs; Receive an activation command activating a TCI state associated with a first narrow beam, where the combination of the first AP-CSI-RS and the first associated QCL type D resource uniquely indicates the first narrow beam; and Use the TCI state to transmit or receive a reference signal.

19. The method according to claim 18, the method further comprising: Receive second DCI triggering the AP-CSI-RS resource set, where a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and where the second AP-CSI-RS is associated with the first associated QCL type D resource; and Use the first narrow beam to transmit or receive a second reference signal.

20. The method according to claim 18, the method further comprising: Receive second DCI triggering the AP-CSI-RS resource set, where a second AP-CSI-RS associated with the second DCI and the first AP-CSI-RS associated with the first DCI are the same AP-CSI-RS, and where the second AP-CSI-RS is associated with a second associated QCL type D resource different from the first associated QCL type D resource; and Use a second narrow beam different from the first narrow beam to transmit or receive a second reference signal.

21. The method according to claim 18, wherein transmitting the reference signal comprises: Select a transmit beam that matches the receive beam of a network entity.

22. The method according to claim 18, wherein receiving the reference signal comprises: Select a receive beam that matches the transmit beam of a network entity.

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