Techniques for activating path loss reference signals

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive an indication of an uplink transmission configuration indication (TCI) state. The UE may determine that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission. The UE may determine an uplink power control parameter for the uplink transmission based at least in part on the path loss reference signal. Numerous other aspects are provided.

Description

[0001] Cross - Reference to Related Applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 949,829, titled "TECHNIQUES FOR ACTIVATING A PATH LOSS REFERENCE SIGNAL", filed on December 18, 2019, and U.S. Non - Provisional Patent Application No. 16 / 949,031, titled "TECHNIQUES FOR ACTIVATING A PATH LOSS REFERENCE SIGNAL", filed on October 9, 2020, which are hereby incorporated by reference in their entirety.

[0003] Field of Disclosure

[0004] Aspects of the present disclosure generally relate to wireless communication, and more particularly, to techniques for activating a path loss reference signal.

[0005] Description of Related Art

[0006] 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 a multiple access technology that is capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies 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 / LTE - Advanced is an enhanced set of mobile standards for the Universal Mobile Telecommunications System (UMTS) promulgated by the 3rd Generation Partnership Project (3GPP).

[0007] A wireless communication network may include several base stations (BSs) capable of supporting communication of several user equipments (UEs). A user equipment (UE) may communicate with a base station (BS) via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a B - node, gNB, access point (AP), radio head, transmission and reception point (TRP), New Radio (NR) BS, 5G B - node, and so on.

[0008] The above multiple access techniques have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments to communicate at the urban, national, regional, and even global levels. New Radio (NR) (which may also be referred to as 5G) is an enhanced set of the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrums, and using Orthogonal Frequency Division Multiplexing with Cyclic Prefix (CP-OFDM) on the downlink (DL), CP-OFDM and / or SC-FDM (e.g., also referred to as Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, Multiple-Input Multiple-Output (MIMO) antenna technology, and carrier aggregation to better integrate with other open standards. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access techniques and the telecommunication standards that employ these techniques.

[0009] Overview

[0010] In some aspects, a method for a user equipment (UE) to perform wireless communication may include: receiving an indication of an uplink Transmission Configuration Indicator (TCI) state; determining that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission; and determining an uplink power control parameter for the uplink transmission based at least in part on the path loss reference signal.

[0011] In some aspects, the method includes: performing the uplink transmission using the uplink power control parameter. In some aspects, the method includes: performing the uplink transmission on a Physical Uplink Control Channel resource, a Physical Uplink Shared Channel resource, a Physical Random Access Channel resource, or a sounding reference signal resource or resource set. In some aspects, receiving the indication of the uplink TCI state includes: receiving the indication of the uplink TCI state in Radio Resource Control communication, Medium Access Control control element communication, or Downlink Control Information communication.

[0012] In some aspects, determining that the uplink TCI state identifies the path loss reference signal includes: identifying, in a downlink communication that includes an indication of the uplink TCI state, a field configured to indicate whether the uplink TCI state identifies the path loss reference signal; and determining that the uplink TCI state identifies the path loss reference signal at least in part based on the field. In some aspects, the method includes: receiving an indication that the uplink TCI state identifies an updated path loss reference signal that is different from the path loss reference signal, wherein the indication that the uplink TCI state identifies the updated path loss reference signal is received in a downlink communication different from the downlink communication in which the indication of the uplink TCI state is received.

[0013] In some aspects, the method includes: determining that the uplink TCI state does not identify the path loss reference signal; and identifying the path loss reference signal at least in part based on at least one of radio resource control communication, media access control element communication, or downlink control information communication. In some aspects, determining that the uplink TCI state identifies the path loss reference signal includes: determining that the uplink TCI state identifies the path loss reference signal at least in part based on an uplink transmission being scheduled.

[0014] In some aspects, a method for a base station (BS) to perform wireless communication may include: transmitting an indication of an uplink TCI state to a UE; and transmitting an associated path loss reference signal at least in part based on the uplink TCI state.

[0015] In some aspects, the method includes: receiving an uplink transmission based at least in part on the path loss reference signal in a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. In some aspects, transmitting an indication of the uplink TCI state includes: transmitting an indication of the uplink TCI state in radio resource control communication, media access control control element communication, or downlink control information communication. In some aspects, transmitting an indication of the uplink TCI state includes: transmitting an indication of the uplink TCI state in a downlink communication that includes a field configured to indicate whether the uplink TCI state identifies the path loss reference signal.

[0016] In some aspects, transmitting an indication of the uplink TCI state includes: determining a path loss reference signal to be updated for an associated uplink transmission; and transmitting an indication of the uplink TCI state at least in part based on the determination. In some aspects, the method includes: determining a path loss reference signal to be updated for an associated uplink transmission; and transmitting an indication of the updated path loss reference signal in a downlink communication different from the downlink communication in which the indication of the uplink TCI state is transmitted at least in part based on the determination.

[0017] In some aspects, the method includes: transmitting an indication of the path loss reference signal in at least one of radio resource control communication, media access control element communication, or downlink control information communication, where the uplink TCI state does not identify the path loss reference signal. In some aspects, the path loss reference signal is at least in part based on the uplink transmission.

[0018] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to receive an indication of an uplink TCI state; determine that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission; and determine an uplink power control parameter for the uplink transmission at least in part based on the path loss reference signal.

[0019] In some aspects, the one or more processors are further configured to perform the uplink transmission using the uplink power control parameter. In some aspects, the one or more processors are further configured to perform the uplink transmission in a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. In some aspects, the one or more processors are used to: receive an indication of the uplink TCI state in radio resource control communication, media access control control element communication, or downlink control information communication when receiving the indication of the uplink TCI state.

[0020] In some aspects, the one or more processors, when determining that the uplink TCI state identifies the path loss reference signal, are configured to: identify, in downlink communication that includes an indication of the uplink TCI state, a field that is configured to indicate whether the uplink TCI state identifies the path loss reference signal; and determine that the uplink TCI state identifies the path loss reference signal at least in part based on the field. In some aspects, the one or more processors are further configured to receive an indication that the uplink TCI state identifies an updated path loss reference signal that is different from the path loss reference signal, wherein the indication that the uplink TCI state identifies the updated path loss reference signal is received in a downlink communication that is different from the downlink communication in which the indication of the uplink TCI state is received.

[0021] In some aspects, the one or more processors are further configured to determine that the uplink TCI state does not identify the path loss reference signal; and identify the path loss reference signal at least in part based on at least one of radio resource control communication, media access control element communication, or downlink control information communication. In some aspects, the one or more processors, when determining that the uplink TCI state identifies the path loss reference signal, are configured to: determine that the uplink TCI state identifies the path loss reference signal at least in part based on the uplink transmission that is being scheduled.

[0022] In some aspects, a BS for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to transmit an indication of the uplink TCI state to a UE; and transmit an associated path loss reference signal at least in part based on the uplink TCI state.

[0023] In some aspects, the one or more processors are further configured to receive an uplink transmission that is at least in part based on the path loss reference signal in a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. In some aspects, the one or more processors, when transmitting an indication of the uplink TCI state, are configured to: transmit an indication of the uplink TCI state in radio resource control communication, media access control control element communication, or downlink control information communication. In some aspects, the one or more processors, when transmitting an indication of the uplink TCI state, are configured to: transmit an indication of the uplink TCI state in downlink communication that includes a field that is configured to indicate whether the uplink TCI state identifies the path loss reference signal.

[0024] In some aspects, the one or more processors, when transmitting an indication of the uplink TCI state, are configured to: determine a path loss reference signal to update for an associated uplink transmission; and transmit the indication of the uplink TCI state at least in part based on the determination. In some aspects, the one or more processors are further configured to determine a path loss reference signal to update for an associated uplink transmission; and transmit an indication of the updated path loss reference signal at least in part based on the determination in a downlink communication different from the downlink communication in which the indication of the uplink TCI state is transmitted.

[0025] In some aspects, the one or more processors are further configured to transmit an indication of the path loss reference signal in at least one of radio resource control communication, media access control element communication, or downlink control information communication, where the uplink TCI state does not identify the path loss reference signal. In some aspects, the path loss reference signal is at least in part based on the uplink transmission.

[0026] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: receive an indication of an uplink TCI state; determine that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission; and determine an uplink power control parameter for the uplink transmission at least in part based on the path loss reference signal.

[0027] In some aspects, the one or more instructions, when executed by the one or more processors, further cause the one or more processors to: perform the uplink transmission using the uplink power control parameter. In some aspects, the one or more instructions, when executed by the one or more processors, further cause the one or more processors to: perform the uplink transmission in a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or set of resources. In some aspects, the one or more instructions that cause the one or more processors to receive an indication of the uplink TCI state cause the one or more processors to: receive the indication of the uplink TCI state in radio resource control communication, media access control control element communication, or downlink control information communication.

[0028] In some aspects, the one or more instructions that cause the one or more processors to determine the uplink TCI state identifying the path loss reference signal cause the one or more processors to: identify, in a downlink communication that includes an indication of the uplink TCI state, a field configured to indicate whether the uplink TCI state identifies the path loss reference signal; and determine, at least in part based on the field, that the uplink TCI state identifies the path loss reference signal. In some aspects, the one or more instructions, when executed by the one or more processors, further cause the one or more processors to: receive an indication that the uplink TCI state identifies an updated path loss reference signal different from the path loss reference signal, where the indication that the uplink TCI state identifies the updated path loss reference signal is received in a downlink communication different from the downlink communication in which the indication of the uplink TCI state is received.

[0029] In some aspects, the one or more instructions, when executed by the one or more processors, further cause the one or more processors to: determine that the uplink TCI state does not identify the path loss reference signal; and identify the path loss reference signal, at least in part based on at least one of radio resource control communication, media access control element communication, or downlink control information communication. In some aspects, the one or more instructions that cause the one or more processors to determine that the uplink TCI state identifies the path loss reference signal cause the one or more processors to: determine, at least in part based on a scheduled uplink transmission, that the uplink TCI state identifies the path loss reference signal.

[0030] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a BS, may cause the one or more processors to: transmit an indication of an uplink TCI state to a UE; and transmit an associated path loss reference signal, at least in part based on the uplink TCI state.

[0031] In some aspects, when executed by the one or more processors, the one or more instructions further cause the one or more processors to: receive an uplink transmission that is at least partially based on the path loss reference signal on a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. In some aspects, the one or more instructions that cause the one or more processors to transmit an indication of the uplink TCI state cause the one or more processors to: transmit an indication of the uplink TCI state in radio resource control communication, media access control control element communication, or downlink control information communication. In some aspects, the one or more instructions that cause the one or more processors to transmit an indication of the uplink TCI state cause the one or more processors to: transmit an indication of the uplink TCI state in downlink communication, where the downlink communication includes a field configured to indicate whether the uplink TCI state identifies the path loss reference signal.

[0032] In some aspects, the one or more instructions that cause the one or more processors to transmit an indication of the uplink TCI state cause the one or more processors to: determine a path loss reference signal to update for an associated uplink transmission; and transmit an indication of the uplink TCI state at least partially based on the determination. In some aspects, when executed by the one or more processors, the one or more instructions further cause the one or more processors to: determine a path loss reference signal to update for an associated uplink transmission; and transmit an indication of the updated path loss reference signal in a downlink communication different from the downlink communication in which the indication of the uplink TCI state is transmitted, at least partially based on the determination.

[0033] In some aspects, when executed by the one or more processors, the one or more instructions further cause the one or more processors to: transmit an indication of the path loss reference signal in at least one of radio resource control communication, media access control control element communication, or downlink control information communication, where the uplink TCI state does not identify the path loss reference signal. In some aspects, the path loss reference signal is at least partially based on the uplink transmission.

[0034] In some aspects, a device for wireless communication may include: means for receiving an indication of an uplink TCI state; means for determining that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission; and means for determining an uplink power control parameter for the uplink transmission at least partially based on the path loss reference signal.

[0035] In some aspects, the device further comprises: means for performing the uplink transmission using the uplink power control parameter. In some aspects, the device further comprises: means for performing the uplink transmission on a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. In some aspects, the means for receiving an indication of the uplink TCI state comprises: means for receiving an indication of the uplink TCI state in radio resource control communication, media access control control element communication, or downlink control information communication.

[0036] In some aspects, the means for determining that the uplink TCI state identifies the path loss reference signal comprises: means for identifying, in a downlink communication comprising an indication of the uplink TCI state, a field configured to indicate whether the uplink TCI state identifies the path loss reference signal; and means for determining, at least in part based on the field, that the uplink TCI state identifies the path loss reference signal. In some aspects, the device further comprises: means for receiving an indication that the uplink TCI state identifies an updated path loss reference signal different from the path loss reference signal, wherein the indication that the uplink TCI state identifies the updated path loss reference signal is received in a downlink communication different from the downlink communication in which the indication of the uplink TCI state is received.

[0037] In some aspects, the device further comprises means for: determining that the uplink TCI state does not identify the path loss reference signal; and identifying the path loss reference signal at least in part based on at least one of radio resource control communication, media access control element communication, or downlink control information communication. In some aspects, the means for determining that the uplink TCI state identifies the path loss reference signal is configured to: determine that the uplink TCI state identifies the path loss reference signal at least in part based on the uplink transmission being scheduled.

[0038] In some aspects, a device for wireless communication may comprise: means for transmitting an indication of an uplink TCI state to a UE; and means for transmitting an associated path loss reference signal at least in part based on the uplink TCI state.

[0039] In some aspects, the apparatus further includes: means for receiving an uplink transmission that is at least partially based on the path loss reference signal in a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. In some aspects, the means for transmitting an indication of the uplink TCI state includes: means for transmitting an indication of the uplink TCI state in radio resource control communication, media access control control element communication, or downlink control information communication. In some aspects, the means for transmitting an indication of the uplink TCI state includes: means for transmitting an indication of the uplink TCI state in downlink communication, wherein the downlink communication includes a field configured to indicate whether the uplink TCI state identifies the path loss reference signal.

[0040] In some aspects, the means for transmitting an indication of the uplink TCI state includes: means for determining to update the path loss reference signal for an associated uplink transmission; and means for transmitting an indication of the uplink TCI state at least partially based on the determination. In some aspects, the apparatus further includes: means for determining to update the path loss reference signal for an associated uplink transmission; and means for transmitting an indication of the updated path loss reference signal in a downlink communication different from the downlink communication in which the indication of the uplink TCI state is transmitted, at least partially based on the determination.

[0041] In some aspects, the apparatus includes: means for transmitting an indication of the path loss reference signal in at least one of radio resource control communication, media access control control element communication, or downlink control information communication, wherein the uplink TCI state does not identify the path loss reference signal. In some aspects, the path loss reference signal is at least partially based on the uplink transmission.

[0042] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems substantially as described herein with reference to the figures and the specification and as illustrated in the figures and the specification.

[0043] The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with this disclosure 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 as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both as to their organization and method of operation, as well as associated advantages, will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the drawings is provided for the purpose of illustration and description, and not as a definition of the limits of the claims. Brief Description of the Drawings

[0045] To understand the features set forth above in greater detail, reference may be made to the aspects described in more specific detail below, some of which are illustrated in the accompanying drawings. It should be noted, however, that the drawings illustrate only certain typical aspects of this disclosure and should not be considered limiting of its scope, as the description may admit of other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0046] Figure 1 is a diagram illustrating an example of a wireless communication network in accordance with various aspects of this disclosure.

[0047] Figure 2 is a diagram illustrating an example of a base station (BS) and a user equipment (UE) in communication in a wireless communication network in accordance with various aspects of this disclosure.

[0048] Figure 3A and 3B is a diagram illustrating one or more examples of activating a path loss reference signal in accordance with various aspects of this disclosure.

[0049] Figure 4 is a diagram illustrating an example process, such as one performed by a UE, in accordance with various aspects of this disclosure.

[0050] Figure 5 is a diagram illustrating an example process, such as one performed by a BS, in accordance with various aspects of this disclosure.

[0051] Figure 6 is a data flow diagram illustrating the data flow between different modules / devices / components in an example device in accordance with various aspects of this disclosure.

[0052] Figure 7 is a data flow diagram illustrating the data flow between different modules / devices / components in an example device in accordance with various aspects of this disclosure.

[0053] Detailed Description

[0054] Aspects of the present disclosure are described more fully hereinafter 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 present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the present disclosure. For example, any number of the aspects set forth herein may be used to implement an apparatus or practice a method. Additionally, the scope of the present disclosure is intended to cover such apparatus or methods practiced using other structures, functionality, or a combination of structures and functionality that supplement or are additional to the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of a claim.

[0055] Certain aspects of a telecommunications system will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in detail hereinafter and illustrated in the drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0056] It should be noted that while aspects may be described herein using terms typically associated with 3G and / or 4G wireless technologies, aspects of the present disclosure may be applied in communication systems based on other generations (such as 5G and later generations, including NR technologies).

[0057] Figure 1 FIG. 100 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include several BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with user equipment (UE) and may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmission reception point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to the coverage area of a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0058] The BS can provide communication coverage for macro cells, pico cells, femto cells, and / or another type of cell. A macro cell can cover a relatively large geographical area (e.g., with a radius of several kilometers) and can allow unconstrained access by UEs with service subscriptions. A pico cell can cover a relatively small geographical area and can allow unconstrained access by UEs with service subscriptions. A femto cell can cover a relatively small geographical area (e.g., a residence) and can allow constrained access by UEs associated with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). The BS for a macro cell can be referred to as a macro BS. The BS for a pico cell can be referred to as a pico BS. The BS for a femto cell can be referred to as a femto BS or a home BS. In Figure 1 the example shown in, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. The BS can support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" can be used interchangeably herein.

[0059] In some aspects, a cell may not have to be stationary, and the geographical area of the cell can move according to the position of the mobile BS. In some aspects, the BSs can be interconnected with each other and / or interconnected to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as direct physical connections, virtual networks, and / or analogs using any suitable transport network.

[0060] The wireless network 100 may also include relay stations. A relay station is an entity that can receive the transmission of data from an upstream station (e.g., a BS or a UE) and send the transmission of the data to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. In Figure 1 the example shown in, relay station 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay station can also be referred to as a relay BS, a relay base station, a relay, etc.

[0061] The wireless network 100 can be a heterogeneous network including different types of BSs (e.g., macro BS, pico BS, femto BS, relay BS, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0062] The network controller 130 can be coupled to a set of BSs and can provide coordination and control of these BSs. The network controller 130 can communicate with each BS via a backhaul. These BSs can also communicate with each other directly or indirectly, e.g., via a wireless or wired backhaul.

[0063] UEs 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UEs can also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE 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, a camera, a gaming device, a netbook, a smartbook, a superbook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0064] Some UEs can be considered machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity to a network (e.g., a wide area network such as the Internet or a cellular network) or provide connectivity to the network, e.g., via a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as narrowband IoT (NB-IoT) devices. Some UEs can be considered customer premise equipment (CPE). The UE 120 can be included inside a housing that houses components of the UE 120, such as a processor component, a memory component, etc.

[0065] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. The RAT can also be referred to as radio technology, air interface, etc. The frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network can be deployed.

[0066] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., communicate with each other without using the base station 110 as an intermediary). For example, the UE 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which can include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), mesh network, etc. In this case, the UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the base station 110.

[0067] As indicated above, Figure 1 is provided as an example. Other examples may be different from the example regarding Figure 1 described.

[0068] Figure 2 FIG. shows a block diagram of a design 200 of a base station 110 and a UE 120, where the base station 110 and the UE 120 can be Figure 1 one of the base stations and one of the UEs in. The base station 110 can be equipped with T antennas 234a to 234t, while the UE 120 can be equipped with R antennas 252a to 252r, where generally T≥1 and R≥1.

[0069] At base station 110, transmit processor 220 may receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCSs) for a UE at least in part based on channel quality indicators (CQIs) received from each UE, process (e.g., encode and modulate) the data for the UE at least in part based on the MCSs selected for each UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRSs)) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process its respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively. According to various aspects described in more detail below, position coding may be utilized to generate synchronization signals to convey additional information.

[0070] At the UE 120, antennas 252a through 252r may receive downlink signals from the base station 110 and / or other base stations and may provide the received signals to demodulators (DEMOD) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 256 may obtain the received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols when applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for the UE 120 to the data sink 260, and provide the decoded control information and system information to the controller / processor 280. The channel processor may determine the reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of the UE 120 may be included in a housing.

[0071] 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, CQI, etc.). The transmit processor 264 may also 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 modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, the uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, 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 provide the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0072] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component may perform one or more techniques associated with activating a path loss reference signal, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 any other component may perform or direct operations of, for example, Figure 4 process 400, Figure 5 process 500, and / or other processes as described herein. The memories 242 and 282 may store data and program codes for the base station 110 and the UE 120, respectively. In some aspects, the memory 242 and / or the memory 282 may include: a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, when executed by one or more processors of the base station 110 and / or the UE 120, the one or more instructions may perform or direct operations of, for example, Figure 4 process 400, Figure 5 process 500, and / or other processes as described herein. The scheduler 246 may schedule the UE for data transmission on the downlink and / or uplink.

[0073] In some aspects, the UE 120 may include: means for receiving an indication of an uplink transmission configuration indication (TCI) state; means for determining that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission; means for determining an uplink power control parameter for the uplink transmission based at least in part on the path loss reference signal; and so on. In some aspects, such means may include one or more components of the UE 120 described in conjunction with Figure 2 , such as the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, the antenna 252, the DEMOD 254, the MIMO detector 256, the receive processor 258, and so on.

[0074] In some aspects, the base station 110 may include: means for transmitting an indication of an uplink TCI state to the UE 120; means for transmitting an associated path loss reference signal based at least in part on the uplink TCI state; and so on. In some aspects, such means may include one or more components of the base station 110 described in conjunction with Figure 2 , such as the antenna 234, the DEMOD 232, the MIMO detector 236, the receive processor 238, the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, and so on.

[0075] As indicated above, Figure 2is provided as an example. Other examples may be different from those Figure 2 described.

[0076] Wireless communication devices (such as UEs, BSS, transmission reception points (TRPs), etc.) can communicate with each other using beams. The beams can be defined using transmission configuration indicator (TCI) states. The TCI state of a beam can indicate the source reference signal and the quasi-co-location (QCL) type to be used for that beam. The QCL type can correspond to one or more QCL relationships that indicate how the source reference signal will be quasi-co-located (QCL) with the channel on the beam. If the characteristics of the channel (e.g., the channel on the beam) carrying the symbols on one antenna port can be inferred from the channel (e.g., the source reference signal) carrying the symbols on another antenna port, then the two antenna ports are said to be QCL. Examples of QCL relationships that can be bundled by QCL type include: Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters. Thus, the characteristics of the beam can be derived from the characteristics of the source reference signal.

[0077] In some cases, the BS and / or the UE may be able to perform downlink and / or uplink beam management. In such cases, the BS may be able to configure one or more beam management parameters, be able to activate and / or deactivate the UE's uplink and / or downlink beams, etc. As an example, the BS may be able to configure, activate, and / or deactivate uplink and / or downlink TCI states, such as physical downlink control channel (PDCCH) TCI state, physical downlink shared channel (PDSCH) TCI state, channel state information reference signal (CSI-RS) TCI state, etc. As another example, the BS may be able to configure, activate, and / or deactivate uplink spatial relationships (e.g., which may include indications of beam and / or BS co-location, quasi-co-location, etc.), such as physical uplink control channel (PUCCH) spatial relationship, SRS spatial relationship, etc.

[0078] In addition, the BS may be able to configure one or more path loss reference signal parameters, be able to activate and / or deactivate the UE's path loss reference signal transmission, etc. In some aspects, the BS and / or the UE may use path loss reference signals to track, manage, and compensate for BS and / or UE mobility in a wireless network. For example, the BS may configure path loss reference signal parameters that indicate the time-frequency resources and / or beams on which the BS will transmit the path loss reference signal, configure the periodicity, semi-persistence, or aperiodicity of the path loss reference signal transmission, etc.

[0079] When the beam or spatial relationship of the UE changes, the BS may need to indicate beam management parameters and path loss reference signal parameters to the UE in separate downlink communications because there is no mechanism that permits the BS to indicate path loss reference signal parameters together with beam management signaling. This additional signaling results in additional overhead for configuring the UE for beam and / or spatial relationship changes, reduced reliability in terms of beam management parameter and path loss reference signal parameter signaling, increased latency in terms of configuring path loss reference signal parameters and on the UE side, etc.

[0080] Some of the techniques and apparatuses described herein provide a unified framework for beam management. In some aspects, an uplink TCI state is introduced to provide flexibility in dynamically configuring and / or updating path loss reference signal parameters to be used as part of beam management. In this way, the BS can use the uplink TCI state to indicate various types of uplink QCL relationships to the UE, such as Doppler shift, Doppler spread, average delay, delay spread, etc. Additionally, the uplink TCI state permits the indication of beam management parameters and path loss reference signal parameters in the same downlink communication, which reduces the overhead for configuring the UE for beam and / or spatial relationship changes, increases the reliability in terms of beam management parameter and path loss reference signal parameter signaling, reduces the latency in terms of configuring path loss reference signal parameters and on the UE side, etc.

[0081] Furthermore, the BS can flexibly use the uplink TCI state to indicate whether a path loss reference signal is configured for an associated uplink transmission, can use the uplink TCI state to indicate various parameters for the path loss reference signal, etc. In this way, the UE can determine that the indication of the uplink TCI state identifies the path loss reference signal to be measured to determine the uplink power control parameter to be used for the associated uplink transmission.

[0082] Figure 3A and 3B are diagrams illustrating one or more examples 300 of activating a path loss reference signal in accordance with various aspects of the present disclosure. As shown in FIG. 3, example(s) 300 may include communication between a UE (e.g., UE 120) and a BS (e.g., BS 110). In some aspects, the BS and the UE may be included in a wireless network (such as wireless network 100). In some aspects, the BS and the UE may communicate over an access link, which may include an uplink and a downlink.

[0083] In some aspects, the BS and the UE may be able to perform multi-beam operations on the uplink and / or downlink. For example, the BS and the UE may be able to use one or more downlink beams to communicate on the downlink, may be able to use one or more uplink beams to communicate on the uplink, and so on. In some aspects, the BS and / or the UE may be able to perform downlink and / or uplink beam management. In such a case, the BS may be able to configure one or more beam management parameters, may be able to activate and / or deactivate uplink and / or downlink beams, and so on. In addition, the BS may be able to configure one or more path loss reference signal parameters, and be able to activate and / or deactivate the UE's path loss reference signal transmission, and so on. In some aspects, the BS and / or the UE may use path loss reference signals to track, manage, and compensate for the mobility of the BS and / or the UE in the wireless network.

[0084] As Figure 3A shown in and indicated by reference numeral 302, the BS may transmit an indication of the uplink TCI state to the UE to indicate various types of uplink QCL relationships, such as Doppler frequency shift, Doppler spread, average delay, delay spread, etc. In some aspects, the BS may transmit an indication of the uplink TCI state at least partially based on a beam change or a change in the spatial relationship of the UE. In some aspects, the uplink TCI state may be associated with an uplink transmission scheduled for the UE, such as a PUCCH transmission, a physical uplink shared channel (PUSCH) transmission, a physical random access channel (PRACH) transmission, a sounding reference signal (SRS) transmission, or another type of uplink transmission. For example, the BS may transmit an indication of the uplink TCI state in a downlink control information (DCI) communication scheduling a resource for uplink transmission (e.g., a PUCCH resource, a PUSCH resource, an SRS resource indicator (SRI) for PUSCH transmission, a PRACH resource, an SRS resource, or a resource set, etc.).

[0085] In some aspects, the BS may transmit an indication of the uplink TCI state in a downlink communication (e.g., a downlink signaling communication), such as a radio resource control (RRC) communication, a media access control element (MAC-CE) communication, a DCI communication, etc. In some aspects, the uplink TCI state may be indicated in an uplink TCI field in the downlink communication. In some aspects, the BS may transmit an indication of the uplink TCI state in the same downlink communication as other beam management information and / or parameters (such as uplink and / or downlink beam activation information, downlink TCI state information, etc.).

[0086] As in Figure 3AAs shown further by reference numeral 304 in the figure, the UE may receive an indication of the uplink TCI state and may determine whether the uplink TCI state identifies a path loss reference signal for an associated uplink transmission. In some aspects, the BS may configure the uplink TCI state (or uplink TCI field) to always indicate the associated path loss reference signal and / or parameters for the path loss reference signal. In some aspects, the BS may configure the UE to always determine via downlink signaling (e.g., via RRC communication, MAC-CE communication, DCI communication, etc.) that the uplink TCI state identifies a path loss reference signal. In such a case, the UE may determine that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission.

[0087] In some aspects, the BS may configure the uplink TCI state (or uplink TCI field) to identify a path loss reference signal in some cases and not to identify a path loss reference signal in other cases. Whether the uplink TCI state (or uplink TCI field) identifies a path loss reference signal may be indicated in additional signaling in the downlink communication including an indication of the uplink TCI state. For example, the downlink communication may include another field (e.g., a path loss reference signal indicator field) that includes a flag, bits, values, etc. The flag, bits, values, etc. in this field may be used to indicate whether the uplink TCI state indicated in the uplink TCI field of the downlink communication identifies a path loss reference signal. As an example, a first value in this field may indicate that the uplink TCI state identifies a path loss reference signal, while a second value in this field may indicate that the uplink TCI state does not identify a path loss reference signal.

[0088] As in Figure 3B shown in the figure and by reference numeral 306, if the UE determines that the uplink TCI state identifies a path loss reference signal associated with an uplink transmission, the UE may determine an uplink power control parameter for the uplink transmission based at least in part on (e.g., may be from the BS transmitted) the path loss reference signal. The path loss reference signal may include a demodulation reference signal (DMRS), CSI-RS, a tracking reference signal (TRS), a reference signal specifically configured as a path loss reference signal, or other types of reference signals. The UE may determine the uplink power control parameter by performing one or more measurements on the path loss reference signal, and these measurements may include: path loss measurement, RSRP measurement, RSSI measurement, RSRQ measurement, CQI measurement, signal-to-noise ratio (SNR) measurement, signal-to-interference-plus-noise ratio (SINR) measurement, etc. The uplink power control parameter may include an automatic gain control parameter, an open-loop power control parameter, a closed-loop power control parameter, transmit power, etc.

[0089] As shown in Figure 3B and further indicated by reference numeral 308 in the drawings, the UE may use the uplink power control parameter to perform the uplink transmission. For example, the UE may configure the uplink transmit power for the uplink transmission at least in part based on the uplink power control parameter, and may perform the uplink transmission at the configured uplink transmit power.

[0090] In some aspects, the BS may update the path loss reference signal for the UE. For example, if the BS previously transmitted an indication of the uplink TCI state to the UE for different types of uplink transmissions or different beams (e.g., which may be associated with different path loss reference signals or different path loss reference signal configurations), the BS may transmit an indication of the uplink TCI state for updating the path loss reference signal for different types of uplink transmissions. As another example, the BS may transmit an indication of the updated path loss reference signal for the uplink TCI state indicated in a previous downlink communication. In this case, the BS may transmit an indication of the updated path loss reference signal in different downlink communications, which may include RRC communications, MAC-CE communications, DCI communications, and so on.

[0091] In this way, the BS may use the uplink TCI state to provide flexibility in dynamically configuring and / or updating the path loss reference signal parameters to be used as part of beam management. The BS may use the uplink TCI state to indicate various types of uplink QCL relationships to the UE, such as Doppler shift, Doppler spread, average delay, delay spread, etc. In addition, the uplink TCI state allows for indicating beam management parameters and path loss reference signal parameters in the same downlink communication, which reduces the overhead in configuring the UE for beam and / or spatial relationship changes, improves the reliability of beam management parameter and path loss reference signal parameter signaling, reduces the latency in configuring the path loss reference signal parameters and the UE, and so on. In this way, the BS may flexibly use the uplink TCI state to indicate whether a path loss reference signal is configured for an associated uplink transmission, and may use the uplink TCI state to indicate various parameters for the path loss reference signal, etc. The UE may determine that the indication of the uplink TCI state identifies the path loss reference signal to be measured to determine the uplink power control parameter to be used for the associated uplink transmission.

[0092] As indicated above, Figure 3A and 3B are provided as one or more examples. Other examples may be different from those regarding Figure 3A and Figure 3BThe described example.

[0093] Figure 4 is a diagram illustrating an example process 400 performed by a UE, for example, in accordance with various aspects of the present disclosure. The example process 400 is an example in which a UE (e.g., UE 120, Figure 6 the device 602 depicted in etc.) performs operations associated with activating a path loss reference signal.

[0094] As shown in Figure 4 In some aspects, as shown, process 400 may include receiving an indication of an uplink TCI state (block 410). For example, a UE (e.g., using the receiving processor 258, the transmitting processor 264, the controller / processor 280, the memory 282, etc.) may receive an indication of the uplink TCI state as described above.

[0095] As Figure 4 further shown in, in some aspects, process 400 may include: determining that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission (block 420). For example, a UE (e.g., using the receiving processor 258, the transmitting processor 264, the controller / processor 280, the memory 282, etc.) may determine that the uplink TCI state identifies a path loss reference signal for an associated uplink transmission as described above.

[0096] As Figure 4 further shown in, in some aspects, process 400 may include: determining an uplink power control parameter for the uplink transmission based at least in part on the path loss reference signal (block 430). For example, a UE (e.g., using the receiving processor 258, the transmitting processor 264, the controller / processor 280, the memory 282, etc.) may determine an uplink power control parameter for the uplink transmission based at least in part on the path loss reference signal as described above.

[0097] Process 400 may include additional aspects, such as any individual aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0098] In a first aspect, process 400 includes: performing the uplink transmission using the uplink power control parameter. In a second aspect, either alone or in combination with the first aspect, process 400 includes; performing the uplink transmission on a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. In a third aspect, either alone or in combination with one or more of the first and second aspects, receiving an indication of the uplink TCI state includes: receiving an indication of the uplink TCI state in radio resource control communication, media access control element communication, or downlink control information communication.

[0099] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, determining that the uplink TCI state identifies the path loss reference signal includes: identifying, in a downlink communication that includes an indication of the uplink TCI state, a field configured to indicate whether the uplink TCI state identifies the path loss reference signal; and determining that the uplink TCI state identifies the path loss reference signal at least in part based on the field. In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 400 includes: receiving an indication that the uplink TCI state identifies an updated path loss reference signal different from the path loss reference signal, wherein the indication that the uplink TCI state identifies the updated path loss reference signal is received in a downlink communication different from the downlink communication in which an indication of the uplink TCI state is received.

[0100] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, process 400 includes: determining that the uplink TCI state does not identify the path loss reference signal; and identifying the path loss reference signal at least in part based on at least one of radio resource control communication, media access control element communication, or downlink control information communication. In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, determining that the uplink TCI state identifies the path loss reference signal includes: determining that the uplink TCI state identifies the path loss reference signal at least in part based on the uplink transmission being scheduled.

[0101] Although Figure 4 example boxes of process 400 are shown, in some aspects, process 400 may include additional boxes, fewer boxes, different boxes, or boxes arranged differently compared to the Figure 4 boxes depicted therein. Additionally or alternatively, two or more boxes of process 400 may be executed in parallel.

[0102] Figure 5FIG. 0 is a diagram illustrating an example process 500 that may be performed by a BS, for example, in accordance with various aspects of the present disclosure. The example process 500 is an example in which a BS (e.g., BS 110, Figure 7 the device 702 depicted in etc.) performs operations associated with activating a path loss reference signal.

[0103] As shown in Figure 5 , in some aspects, process 500 may include transmitting an indication of an uplink TCI state to a UE (block 510). For example, the BS (e.g., using the transmit processor 220, the receive processor 238, the controller / processor 240, the memory 242, etc.) may transmit an indication of the uplink TCI state to the UE as described above.

[0104] As further shown in Figure 5 , in some aspects, process 500 may include: transmitting an associated path loss reference signal at least partially based on the uplink TCI state (block 520). For example, the BS (e.g., using the transmit processor 220, the receive processor 238, the controller / processor 240, the memory 242, etc.) may transmit an associated path loss reference signal at least partially based on the uplink TCI state as described above.

[0105] Process 500 may include additional aspects, such as any individual aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0106] In a first aspect, process 500 includes: receiving an uplink transmission that is at least partially based on the path loss reference signal in a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. In a second aspect, alone or in combination with the first aspect, transmitting an indication of the uplink TCI state includes: transmitting an indication of the uplink TCI state in radio resource control communication, media access control control element communication, or downlink control information communication. In a third aspect, alone or in combination with one or more of the first and second aspects, transmitting an indication of the uplink TCI state includes: transmitting an indication of the uplink TCI state in downlink communication, where the downlink communication includes a field configured to indicate whether the uplink TCI state identifies the path loss reference signal.

[0107] In a fourth aspect, alone or in combination with one or more of the first to third aspects, transmitting an indication of the uplink TCI state includes: determining a path loss reference signal to be updated for an associated uplink transmission; and transmitting an indication of the uplink TCI state at least in part based on the determination. In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 500 includes: determining a path loss reference signal to be updated for an associated uplink transmission; and transmitting an indication of the updated path loss reference signal in a downlink communication different from the downlink communication in which an indication of the uplink TCI state is transmitted, at least in part based on the determination.

[0108] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, process 500 includes: transmitting an indication of the path loss reference signal in at least one of radio resource control communication, media access control element communication, or downlink control information communication, where the uplink TCI state does not identify the path loss reference signal. In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the path loss reference signal is at least in part based on the uplink transmission.

[0109] Although Figure 5 illustrates example blocks of process 500, in some aspects, process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks compared to the blocks depicted in Figure 5 . Additionally or alternatively, two or more blocks of process 500 may be executed in parallel.

[0110] Figure 6 is a data flow diagram 600 that illustrates the data flow between different modules / devices / components in an example device 602. Device 602 may be a UE (e.g., UE 120). In some aspects, device 602 includes a receiving component 604, a determining component 606, and a transmitting component 608.

[0111] In some aspects, the receiving component 604 may receive an indication 610 of the uplink TCI state from a BS 620 (e.g., BS 110). In some aspects, the determining component 606 may determine that the uplink TCI state identifies a path loss reference signal 612 for an associated uplink transmission 614. In some aspects, the determining component 606 may determine an uplink power control parameter for the uplink transmission 614 at least in part based on the path loss reference signal 612 and at least in part based on the determination of the determining component 606. In some aspects, the transmitting component 608 may perform the uplink transmission 614 using the uplink power control parameter determined by the determining component 606.

[0112] In some aspects, the receiving component 604 may include an antenna (e.g., antenna 252), a DEMOD (e.g., DEMOD 254), a MIMO detector (e.g., MIMO detector 256), a receiving processor (e.g., receiving processor 258), a controller / processor (e.g., controller / processor 280), a memory (e.g., memory 282), etc. In some aspects, the determining component 606 may include a receiving processor (e.g., receiving processor 258), a transmitting processor 264, a controller / processor (e.g., controller / processor 280), a memory (e.g., memory 282), etc. In some aspects, the transmitting component 608 may include an antenna (e.g., antenna 252), a MOD (e.g., MOD 254), a Tx MIMO processor (e.g., TX MIMO processor 266), a transmitting processor (e.g., transmitting processor 264), a controller / processor (e.g., controller / processor 280), a memory (e.g., memory 282), etc.

[0113] Device 602 may include executing Figure 4 The aforementioned process 400, Figure 5 The aforementioned process 500 and the like are additional components to each box of the algorithm. Figure 4 The aforementioned process 400, Figure 5 Each block in the aforementioned process 500, etc., may be performed by a component, and the device may include one or more of those components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0114] Figure 6 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Figure 6 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Figure 6 Two or more components shown in may be implemented in a single component, or Figure 6 The single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Figure 6 A set of components (e.g., one or more components) shown in FIG. 1 may perform operations described as being performed by Figure 6 One or more functions performed by another set of components shown in FIG.

[0115] Figure 7FIG. 700 is a data flow diagram that illustrates the data flow between different modules / devices / components in the illustrative example device 702. The device 702 may be a BS (e.g., BS 110). In some aspects, the device 702 includes a receiving component 704 and a transmitting component 706.

[0116] In some aspects, the transmitting component 706 may transmit an indication 708 of the uplink TCI state to the UE 720 (e.g., UE 120). In some aspects, the transmitting component 706 may transmit an associated path loss reference signal 710 at least in part based on the uplink TCI state. In some aspects, the receiving component 704 may receive an uplink transmission 712 from the UE 720 that is at least in part based on an uplink power control parameter determined at least in part on the basis of the path loss reference signal 710.

[0117] In some aspects, the receiving component 704 may include an antenna (e.g., antenna 234), a DEMOD (e.g., DEMOD 232), a MIMO detector (e.g., MIMO detector 236), a receiving processor (e.g., receiving processor 238), a controller / processor (e.g., controller / processor 240), a memory (e.g., memory 242), and so on. In some aspects, the transmitting component 706 may include an antenna (e.g., antenna 234), a MOD (e.g., MOD 232), a Tx MIMO processor (e.g., TX MIMO processor 230), a transmitting processor (transmitting processor 220), a controller / processor (e.g., controller / processor 240), a memory (e.g., memory 242), and so on.

[0118] The device 702 may include additional components that execute each block of the algorithms in the foregoing processes 400, Figure 4 the foregoing processes 500, etc. Figure 5 Each block of the foregoing processes 400, Figure 4 the foregoing processes 500, etc. may be executed by a component, and the device may include one or more of those components. These components may be one or more hardware components specifically configured to execute the processes / algorithms, implemented by a processor configured to execute the processes / algorithms, stored in a computer-readable medium for implementation by a processor, or some combination thereof. Figure 5 The number and arrangement of the components shown in

[0119] Figure 7 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components compared to those shown in Figure 7 In addition, Figure 7 two or more of the components shown inFigure 7 The individual components shown in Figure 7 can be implemented as multiple distributed components. Additionally or alternatively, Figure 7 a set of components (e.g., one or more components) shown in Figure 7 can perform one or more functions described as being performed by Figure 7 another set of components shown in Figure 7 .

[0120] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations can be made in light of the above disclosure or can be obtained by practicing the aspects.

[0121] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented with hardware, firmware, and / or a combination of hardware and software.

[0122] As used herein, depending on the context, meeting a threshold can mean that a value is 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.

[0123] It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, firmware, and / or a combination 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. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software code—understanding that software and hardware can be designed to implement these systems and / or methods at least in part based on the description herein.

[0124] Although specific feature combinations are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the respective aspects. In fact, many of these features can be combined in ways not specifically recited in the claims and / or not disclosed in the specification. Although each of the dependent claims listed below can directly depend on only one claim, the disclosure of the respective aspects includes each dependent claim in combination with each other claim in this set of claims. A phrase that recites "at least one of" a list of items refers to any combination of those items, including a single member. As an 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 with 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).

[0125] The elements, acts, or instructions used herein should not be construed as critical or essential unless expressly described as such. Also, 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." Additionally, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more." Where only one item is intended, the phrase "only one" or similar language is used. Also, as used herein, the terms "having," "containing," "including," etc. are intended to be open-ended terms. Additionally, the phrase "based on" is intended to mean "at least partially based on" unless otherwise expressly stated.

Claims

1. A method for a user equipment (UE) to perform wireless communication, comprising: Receiving an indication of an uplink transmission configuration indication (TCI) state in a downlink control information communication, wherein the indication of the uplink TCI state includes an indication of one or more types of uplink quasi - co - location (QCL) relationships; Determining that the uplink TCI state includes an indication of a path loss reference signal for an associated uplink transmission; and Determining an uplink power control parameter for the associated uplink transmission based at least in part on the path loss reference signal.

2. The method according to claim 1, further comprising: Performing the uplink transmission using the associated uplink power control parameter.

3. The method according to claim 1, further comprising: Performing the associated uplink transmission in one of the following resources: Physical uplink control channel resources, Physical uplink shared channel resources, Physical random access channel resources, or Sounding reference signal resources or resource sets.

4. The method according to claim 1, further comprising: Receiving an indication of another uplink TCI state; Determining that the other uplink TCI state does not identify another path loss reference signal; and And Identifying the other path loss reference signal based at least in part on at least one of the following: Radio resource control communication, Medium access control element communication, or Another downlink control information communication.

5. The method according to claim 1, wherein determining that the uplink TCI state includes an indication of the path loss reference signal comprises: Identifying a field in the downlink control information communication that is configured to indicate whether the uplink TCI state identifies the path loss reference signal; and And Determining that the uplink TCI state includes an indication of the path loss reference signal based at least in part on the field.

6. The method according to claim 1, wherein determining that the uplink TCI state includes an indication of the path loss reference signal comprises: Determining that the uplink TCI state includes an indication of the path loss reference signal based at least in part on the associated uplink transmission being scheduled.

7. The method according to claim 1, further comprising: Receiving an indication of an updated path loss reference signal that is different from the path loss reference signal identified by the uplink TCI state, wherein the indication that the uplink TCI state identifies the updated path loss reference signal is received in a downlink communication different from the downlink control information communication.

8. A method for a network node to perform wireless communication, comprising: Transmitting an indication of an uplink transmission configuration indication (TCI) state in a downlink control information communication, wherein the indication of the uplink TCI state includes an indication of one or more types of uplink quasi - co - location (QCL) relationships; and Transmit an associated path loss reference signal at least partially based on the uplink TCI state, where the uplink TCI state includes an indication of the associated path loss reference signal.

9. The method according to claim 8, further comprising: Receiving an uplink transmission at least partially based on the associated path loss reference signal in the following resources: Physical uplink control channel resources, Physical uplink shared channel resources, Physical random access channel resources, or Sounding reference signal resources or resource sets.

10. The method according to claim 8, further comprising: Transmitting an indication of the associated path loss reference signal in at least one of the following: Radio resource control communication, Media access control element communication, or Another downlink control information communication.

11. The method according to claim 8, wherein the associated path loss reference signal is updated at least partially based on an associated uplink transmission.

12. The method according to claim 8, wherein the downlink control information communication includes: A field configured to indicate whether the associated uplink TCI state identifies the path loss reference signal.

13. The method according to claim 8, wherein transmitting the indication of the uplink TCI state includes: Determining a path loss reference signal to update for an associated uplink transmission; And Transmitting the indication of the uplink TCI state at least partially based on the determination.

14. The method according to claim 8, further comprising: Determining the associated path loss reference signal to update for an associated uplink transmission; And Transmitting an indication of the updated path loss reference signal in a downlink communication different from the downlink control information communication at least partially based on the determination.

15. A user equipment (UE) for wireless communication, comprising: A memory; And One or more processors operatively coupled to the memory, the one or more processors being configured to: Receive an indication of an uplink transmission configuration indication (TCI) state in a downlink control information communication, where the indication of the uplink TCI state includes an indication of one or more types of uplink quasi - co - location (QCL) relationships; Determine that the uplink TCI state includes an indication of a path loss reference signal for an associated uplink transmission; and Determine an uplink power control parameter for the associated uplink transmission at least partially based on the path loss reference signal.

16. The UE according to claim 15, wherein the one or more processors are further configured to: Use the uplink power control parameter to perform the associated uplink transmission.

17. The UE according to claim 15, wherein the one or more processors are further configured to: Perform the associated uplink transmission in the following resources: Physical uplink control channel resources, Physical uplink shared channel resources, Physical random access channel resources, or Sounding reference signal resources or resource sets.

18. The UE according to claim 15, wherein the one or more processors are configured, when determining that the uplink TCI state includes an indication of the path loss reference signal, to: Identify, in the downlink control information communication, a field configured to indicate whether the uplink TCI state identifies the path loss reference signal; and Determine, at least in part based on the field, that the uplink TCI state includes an indication of the path loss reference signal.

19. The UE according to claim 15, wherein the one or more processors are further configured to: Receive an indication that the uplink TCI state identifies an updated path loss reference signal different from the path loss reference signal, wherein the indication that the uplink TCI state identifies the updated path loss reference signal is received in a downlink communication different from the downlink communication in which the indication of the uplink TCI state is received.

20. The UE according to claim 15, wherein the one or more processors are further configured to: Receive an indication of another uplink TCI state; Determine that the another uplink TCI state does not identify another path loss reference signal; and Identify the another path loss reference signal, at least in part based on at least one of: Radio resource control communication, Media access control element communication, or Another downlink control information communication.

21. The UE according to claim 15, wherein the one or more processors are configured, when determining that the uplink TCI state identifies the path loss reference signal, to: Determine, at least in part based on the associated uplink transmission being scheduled, that the uplink TCI state includes an indication of the path loss reference signal.

22. A network node for wireless communication, comprising: A memory; And One or more processors operatively coupled to the memory, the one or more processors being configured to: Transmit, in a downlink control information communication, an indication of an uplink transmission configuration indication (TCI) state, wherein the indication of the uplink TCI state includes an indication of one or more types of uplink quasi - co - location (QCL) relationships; and Transmit an associated path loss reference signal, at least in part based on the uplink TCI state, wherein the uplink TCI state includes an indication of the associated path loss reference signal.

23. The network node according to claim 22, wherein the one or more processors are further configured to: Receive an uplink transmission, at least in part based on the associated path loss reference signal, in one of the following resources: Physical uplink control channel resources, Physical uplink shared channel resources, Physical random access channel resources, or Sounding reference signal resources or resource sets.

24. The network node according to claim 22, wherein the downlink control information communication includes: A field configured to indicate whether the uplink TCI state identifies the associated path loss reference signal.

25. The network node according to claim 22, wherein the one or more processors are configured, when transmitting the indication of the uplink TCI state, to: determine a path loss reference signal to be updated for an associated uplink transmission; and transmit the indication of the uplink TCI state at least in part based on the determination.

26. The network node according to claim 22, wherein the one or more processors are further configured to: determine the associated path loss reference signal to be updated for the associated uplink transmission; and transmit an indication of the updated path loss reference signal in a downlink communication different from the downlink control information communication at least in part based on the determination.

27. The network node according to claim 26, wherein the one or more processors are further configured to: transmit an indication of the associated path loss reference signal in at least one of the following: radio resource control communication, media access control element communication, or another downlink control information communication.

28. The network node according to claim 26, wherein the associated path loss reference signal is updated at least in part based on the associated uplink transmission.

Images