Technique for reporting rank capabilities for multi-transmit-receive point configurations

Abstract

Aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine one or more respective maximum levels for one or more transmission configuration indicator states of the UE; and transmit information identifying the one or more respective maximum levels. In some aspects, a base station may receive information identifying one or more respective maximum levels of the UE for one or more TCI states of the UE; and transmit scheduling information for communication of the UE, wherein the scheduling information is at least partially based on the one or more respective maximum levels. Many 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 / 948,018, filed on December 13, 2019, entitled "TECHNIQUES FOR REPORTING RANK CAPABILITY FOR MULTI TRANSMIT - RECEIVE POINT CONFIGURATION" and U.S. Non - Provisional Patent Application No. 16 / 949,533, filed on November 2, 2020, entitled "TECHNIQUES FOR REPORTING RANK CAPABILITY FOR MULTI TRANSMIT - RECEIVE POINT CONFIGURATION", 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 techniques and apparatus for reporting rank capabilities for multi - transmit - receive point (TRP) configurations. 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 user devices (UEs) 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 set of the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless communication network may include multiple base stations (BSs) capable of supporting communication for multiple user devices (UEs). A user device (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 Node B, gNB, access point (AP), radio head, transmit - receive point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0006] The above multi-access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments to communicate at the city, 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 3rd Generation Partnership Project (3GPP). NR is designed to improve spectral efficiency, reduce costs, improve services, utilize new spectrums, and better integrate with other open standards, as well as support beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation by using orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) (CP-OFDM) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), so as to better support mobile broadband Internet access. However, as the demand for mobile broadband access continues to grow, there is a need to further improve LTE and NR technologies. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that adopt these technologies. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) may include determining one or more corresponding maximum levels for one or more transmission configuration indicator (TCI) states of the UE; and transmitting information identifying the one or more corresponding maximum levels.

[0008] In some aspects, the one or more TCI states are one or more default TCI states of the UE.

[0009] In some aspects, the method may include receiving information indicating a corresponding maximum allowed level for the one or more TCI states of the UE.

[0010] In some aspects, the information indicating the corresponding maximum allowed level is received using at least one of downlink control information, radio resource control signaling, or medium access control control element.

[0011] In some aspects, the method includes receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each of the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowed levels.

[0012] In some aspects, the method includes receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a level that exceeds a corresponding maximum level indicated by one or more respective maximum levels or corresponding maximum allowed levels for the TCI state; and treating the scheduling information as invalid at least in part based on the TCI state having a level that exceeds the corresponding maximum level or corresponding maximum allowed level.

[0013] In some aspects, one or more respective maximum levels indicate corresponding maximum levels for all default TCI states of a default TCI state set for a UE.

[0014] In some aspects, information identifying one or more respective maximum levels is sent using at least one of uplink control information, radio resource control signaling, or a media access control control element.

[0015] In some aspects, the method can include receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each TCI state among the two or more TCI states has a level that meets one or more respective maximum levels; and receiving the communication at least in part based on the scheduling information.

[0016] In some aspects, the method can include receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a level that exceeds a corresponding maximum level indicated by one or more respective maximum levels; and treating the scheduling information as invalid at least in part based on the TCI state having a level that exceeds the corresponding maximum level.

[0017] In some aspects, a method of wireless communication performed by a base station can include receiving information identifying one or more respective maximum levels of one or more TCI states for a UE; and sending scheduling information for a communication for the UE, where the scheduling information is at least in part based on the one or more respective maximum levels.

[0018] In some aspects, one or more TCI states include one or more default TCI states.

[0019] In some aspects, the method includes sending information indicating corresponding maximum allowed levels for one or more TCI states for a UE.

[0020] In some aspects, information indicating corresponding maximum allowed levels is sent using at least one of downlink control information, radio resource control signaling, or medium access control control elements.

[0021] In some aspects, a communication has a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and each TCI state among the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowed levels.

[0022] In some aspects, one or more corresponding maximum levels include corresponding maximum levels for all default TCI states of a default TCI state set for the UE.

[0023] In some aspects, information identifying one or more corresponding maximum levels is sent using at least one of uplink control information, radio resource control signaling, or medium access control control elements.

[0024] In some aspects, a communication has a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and each TCI state among the two or more TCI states has a level that meets one or more corresponding maximum levels.

[0025] 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 determine one or more corresponding maximum levels for one or more TCI states of the UE; and send information identifying the one or more corresponding maximum levels.

[0026] In some aspects, one or more TCI states are one or more default TCI states of the UE.

[0027] In some aspects, one or more processors may receive information indicating corresponding maximum allowed levels for one or more TCI states of the UE.

[0028] In some aspects, information indicating corresponding maximum allowed levels is received using at least one of downlink control information, radio resource control signaling, or medium access control control elements.

[0029] In some aspects, one or more processors may receive scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and each TCI state among the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowed levels.

[0030] In some aspects, one or more processors may receive scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank that exceeds a corresponding maximum rank indicated by one or more respective maximum ranks or a corresponding maximum allowed rank for the TCI state. The one or more processors may consider the scheduling information invalid at least in part based on the TCI state having a rank that exceeds the corresponding maximum rank or the corresponding maximum allowed rank.

[0031] In some aspects, the one or more respective maximum ranks indicate corresponding maximum ranks for all default TCI states of a default TCI state set for a UE.

[0032] In some aspects, information identifying the one or more respective maximum ranks is sent using at least one of uplink control information, radio resource control signaling, or a medium access control control element.

[0033] In some aspects, one or more processors may receive scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each TCI state among the two or more TCI states has a rank that meets one or more respective maximum ranks. The one or more processors may receive the communication at least in part based on the scheduling information.

[0034] In some aspects, one or more processors may receive scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank that exceeds a corresponding maximum rank indicated by one or more respective maximum ranks. The one or more processors may consider the scheduling information invalid at least in part based on the TCI state having a rank that exceeds the corresponding maximum rank.

[0035] In some aspects, a base station 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 information identifying one or more respective maximum ranks for one or more TCI states of a UE; and transmit scheduling information for a communication for the UE, where the scheduling information is at least in part based on the one or more respective maximum ranks.

[0036] In some aspects, the one or more TCI states include one or more default TCI states.

[0037] In some aspects, one or more processors may send information indicating corresponding maximum allowed ranks for one or more TCI states of a UE.

[0038] In some aspects, information indicating a corresponding maximum allowed level is sent using at least one of downlink control information, radio resource control signaling, or medium access control control elements.

[0039] In some aspects, a communication has a slot offset that fails to meet a threshold, the communication is associated with two or more TCI states, and each of the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowed levels.

[0040] In some aspects, one or more corresponding maximum levels include corresponding maximum levels for all default TCI states of a default TCI state set for the UE.

[0041] In some aspects, information identifying one or more corresponding maximum levels is sent using at least one of uplink control information, radio resource control signaling, or medium access control control elements.

[0042] In some aspects, a communication has a slot offset that fails to meet a threshold, the communication is associated with two or more TCI states, and each of the two or more TCI states has a level that meets one or more corresponding maximum levels.

[0043] In some aspects, a non - transitory computer - readable medium can store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions can cause the one or more processors to: determine one or more corresponding maximum levels for one or more TCI states of the UE; and send information identifying the one or more corresponding maximum levels.

[0044] In some aspects, one or more TCI states are one or more default TCI states of the UE.

[0045] In some aspects, one or more instructions cause the UE to receive information indicating a corresponding maximum allowed level for one or more TCI states of the UE.

[0046] In some aspects, information indicating a corresponding maximum allowed level is received using at least one of downlink control information, radio resource control signaling, or medium access control control elements.

[0047] In some aspects, one or more instructions cause the UE to receive scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each of the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowed levels.

[0048] In some aspects, one or more instructions cause the UE to receive scheduling information for a communication with a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where the TCI states among the two or more TCI states have a level that exceeds a corresponding maximum level indicated by one or more respective maximum levels or a corresponding maximum allowed level for the TCI state. The one or more instructions cause the UE to consider the scheduling information invalid at least in part based on the TCI states having a level that exceeds the corresponding maximum level or the corresponding maximum allowed level.

[0049] In some aspects, the one or more respective maximum levels indicate the respective maximum levels for all default TCI states of a default TCI state set for the UE.

[0050] In some aspects, the information identifying the one or more respective maximum levels is sent using at least one of uplink control information, radio resource control signaling, or a medium access control control element.

[0051] In some aspects, one or more instructions cause the UE to receive scheduling information for a communication with a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each TCI state among the two or more TCI states has a level that meets one or more respective maximum levels. The one or more instructions may cause the UE to receive the communication at least in part based on the scheduling information.

[0052] In some aspects, one or more instructions cause the UE to receive scheduling information for a communication with a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where the TCI states among the two or more TCI states have a level that exceeds a corresponding maximum level indicated by one or more respective maximum levels. The one or more instructions may cause the UE to consider the scheduling information invalid at least in part based on the TCI states having a level that exceeds the corresponding maximum level.

[0053] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a base station, the one or more instructions may cause the one or more processors to: receive information identifying one or more respective maximum levels of one or more TCI states of a UE for the UE; and send scheduling information for a communication for the UE, where the scheduling information is at least in part based on the one or more respective maximum levels.

[0054] In some aspects, the one or more TCI states include one or more default TCI states.

[0055] In some aspects, one or more instructions cause a base station to transmit information indicating corresponding maximum allowable levels for one or more TCI states for a UE.

[0056] In some aspects, the information indicating the corresponding maximum allowable levels is transmitted using at least one of downlink control information, radio resource control signaling, or medium access control control elements.

[0057] In some aspects, a communication has a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and each TCI state of the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowable levels.

[0058] In some aspects, one or more of the corresponding maximum levels include the corresponding maximum levels for all default TCI states of a default TCI state set for the UE.

[0059] In some aspects, the information identifying one or more of the corresponding maximum levels is transmitted using at least one of uplink control information, radio resource control signaling, or medium access control control elements.

[0060] In some aspects, a communication has a slot offset that fails to meet a threshold, the communication is associated with two or more TCI states, and each TCI state of the two or more TCI states has a level that meets one or more corresponding maximum levels.

[0061] In some aspects, an apparatus for wireless communication may include components for determining one or more corresponding maximum levels for one or more TCI states of the apparatus; and components for transmitting information identifying one or more of the corresponding maximum levels.

[0062] In some aspects, one or more of the TCI states are one or more default TCI states of the UE.

[0063] In some aspects, the apparatus may include components for receiving information indicating corresponding maximum allowable levels for one or more TCI states of the apparatus.

[0064] In some aspects, the information indicating the corresponding maximum allowable levels is received using at least one of downlink control information, radio resource control signaling, or medium access control control elements.

[0065] In some aspects, the apparatus includes components for receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each TCI state of the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowable levels.

[0066] In some aspects, the apparatus includes means for receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank that exceeds a corresponding maximum rank indicated by one or more respective maximum ranks or a corresponding maximum allowable rank for the TCI state; and means for treating the scheduling information as invalid at least in part based on the TCI state having a rank that exceeds the corresponding maximum rank or the corresponding maximum allowable rank.

[0067] In some aspects, one or more respective maximum ranks indicate corresponding maximum ranks for all default TCI states of a default TCI state set for the apparatus.

[0068] In some aspects, information identifying one or more respective maximum ranks is sent using at least one of uplink control information, radio resource control signaling, or medium access control control elements.

[0069] In some aspects, the apparatus may include means for receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each TCI state among the two or more TCI states has a rank that meets one or more respective maximum ranks; and receiving the communication at least in part based on the scheduling information.

[0070] In some aspects, the apparatus may include means for receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank that exceeds a corresponding maximum rank indicated by one or more respective maximum ranks; and treating the scheduling information as invalid at least in part based on the TCI state having a rank that exceeds the corresponding maximum rank.

[0071] In some aspects, an apparatus for wireless communication may include means for receiving information identifying one or more respective maximum ranks of one or more TCI states of a UE for the UE; and means for sending scheduling information for a communication of the UE, where the scheduling information is at least in part based on the one or more respective maximum ranks.

[0072] In some aspects, one or more TCI states include one or more default TCI states.

[0073] In some aspects, the apparatus includes means for sending information indicating a corresponding maximum allowable rank of one or more TCI states of a UE.

[0074] In some aspects, information indicating corresponding maximum allowed levels is sent using at least one of downlink control information, radio resource control signaling, or medium access control control elements.

[0075] In some aspects, a communication has a slot offset that fails to meet a threshold, the communication is associated with two or more TCI states, and each of the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowed levels.

[0076] In some aspects, one or more corresponding maximum levels include corresponding maximum levels for all default TCI states of a default TCI state set for a UE.

[0077] In some aspects, information identifying one or more corresponding maximum levels is sent using at least one of uplink control information, radio resource control signaling, or medium access control control elements.

[0078] In some aspects, a communication has a slot offset that fails to meet a threshold, the communication is associated with two or more TCI states, and each of the two or more TCI states has a level that meets one or more corresponding maximum levels.

[0079] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, transmit / receive points, and / or processing systems as generally described herein with reference to the figures and as illustrated by the figures.

[0080] The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the present disclosure so 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 structures do not depart from the scope of the appended claims. When considered in conjunction with the accompanying figures, the characteristics of the concepts disclosed herein, both its organization and method of operation, together with associated advantages, will be better understood from the following description. Each of the figures is provided for the purpose of illustration and description and is not to be construed as a definition of the limits of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] To enable a more particular understanding of the above features of the present disclosure, a more specific description may be had by reference to the aspects, some of which are illustrated in the accompanying figures. It will be noted, however, that the figures illustrate only certain typical aspects of the present disclosure and should not be considered limiting of its scope, as the description may admit other equally effective aspects. Like reference numerals in different figures may identify the same or similar elements.

[0082] Figure 1 is a diagram illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0083] Figure 2 is a diagram illustrating an example of a base station communicating with a UE in a wireless communication network in accordance with various aspects of the present disclosure.

[0084] Figure 3 is a diagram illustrating an example of layer distribution for a TCI state pair in accordance with various aspects of the present disclosure.

[0085] Figure 4 is a diagram illustrating an example of signaling the maximum rank for one or more TCI states.

[0086] Figure 5 is a diagram illustrating an example process, such as performed by a user equipment, in accordance with various aspects of the present disclosure.

[0087] Figure 6 is a diagram illustrating an example process, such as performed by a base station, in accordance with various aspects of the present disclosure.

[0088] Figure 7 and 8 is a conceptual data flow diagram illustrating the data flow between different modules / components / sub-components in an example apparatus in accordance with various aspects of the present disclosure. Detailed Description

[0089] Aspects of the present disclosure will be 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 in combination 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. In addition, the scope of the present disclosure is intended to cover such an apparatus or method practiced using other structures, functions, or combinations of structures and functions in addition to or different from the 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.

[0090] 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 in the accompanying drawings by various boxes, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether to implement such elements as hardware or software depends on the particular application and the design constraints imposed on the overall system.

[0091] Note that although terms commonly associated with 5G or 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 RAT (e.g., 6G).

[0092] Figure 1 FIG. is a diagram of a wireless network 100 in which aspects of the present disclosure may be practiced. The wireless network 100 can be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 can include multiple 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 it can also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS can provide communication coverage for a specific geographical area. In 3GPP, the term "cell" can refer to the coverage area of a BS and / or the BS subsystem serving this coverage area, depending on the context in which the term is used.

[0093] A BS can provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell can cover a relatively large geographical area (e.g., with a radius of several kilometers) and can allow unrestricted access by UEs with a service subscription. A pico cell can cover a relatively small geographical area and can allow unrestricted access by UEs with a service subscription. A femto cell can cover a relatively small geographical area (e.g., a home) and can allow restricted access by UEs associated with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). The BS of a macro cell can be referred to as a macro BS. The BS of a pico cell can be referred to as a pico BS. The BS of a femto cell can be referred to as a femto BS or a home BS. In Figure 1In the example shown, BS 110a may be the macro BS of macro cell 102a, BS 110b may be the pico BS of pico cell 102b, and BS 110c may be the femto BS of femto cell 102c. The BS may support one or more (e.g., three) cells. In this document, the terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably.

[0094] In some aspects, the cell is not necessarily fixed, and the geographical area of the cell may move according to the location of the mobile BS. In some aspects, the BSs may be interconnected with each other and / or with 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 similar interfaces using any suitable transmission network).

[0095] The wireless network 100 may also include relay stations. A relay station is an entity capable of receiving the transmission of data from an upstream station (e.g., a BS or a UE) and transmitting the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE capable of relaying transmissions for other UEs. In Figure 1 In the example shown, the relay station 110d may communicate with the macro BS 110a and the UE 120d to facilitate communication between the BS 110a and the UE 120d. The relay station may also be referred to as a relay BS, a relay base station, a repeater, etc.

[0096] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmission power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a high transmission power level (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have lower transmission power levels (e.g., 0.1 to 2 watts).

[0097] The network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via the backhaul. The BSs may also communicate with each other (e.g., directly or indirectly via a wireless or wired backhaul).

[0098] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be fixed or mobile. A UE can also be referred to as an access terminal, terminal, mobile station, user unit, station, 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 computer, a camera, a gaming device, a netbook, a smart book, a superbook, a medical device or equipment, a biosensor / 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, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via wireless or wired media.

[0099] Some UEs can be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. For example, MTC and eMTC UEs include robots, drones, remote devices (such as sensors, meters, monitors, location tags), etc. that can communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node can provide connectivity for or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs can be regarded as Internet of Things (IoT) devices, and / or can be implemented as narrowband IoT (NB-IoT) devices. Some UEs can be regarded as 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.).

[0100] 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. A RAT can also be referred to as a radio technology, an air interface, etc. A frequency can also be referred to as a carrier, a channel, etc. In a given geographical area, each frequency can support a single RAT to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network can be deployed.

[0101] In some aspects, 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., without using the base station 110 as a medium for communicating with each other). 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) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In such cases, the UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the base station 110.

[0102] Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, devices of the wireless network 100 may communicate using an operating frequency band having a first frequency range (FR1) that may span from 410 MHz to 7.125 GHz, and / or may communicate using an operating frequency band having a second frequency range (FR2) that may span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the "sub-6 GHz" band. Similarly, although different from the extremely high frequency (EHF) band (30 GHz - 300 GHz), which is recognized by the International Telecommunication Union (ITU) as the "millimeter wave" band, FR2 is generally referred to as the "millimeter wave" band. Thus, unless otherwise explicitly stated, it should be understood that terms such as "sub-6 GHz" (if used herein) may broadly represent frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise explicitly stated, it should be understood that terms such as "millimeter wave" (if used herein) may broadly represent frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is expected that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein may be applicable to those modified frequency ranges.

[0103] As described above, Figure 1 is provided as an example. Other examples may be different from what is described for Figure 1 what is described.

[0104] Figure 2 A block diagram of a design 200 of the base station 110 and the UE 120 is shown, and the base station 110 and the UE 120 may be Figure 1One of the base stations and one of the UEs. BS 110 may be equipped with T antennas 234a to 234t, and UE 120 may be equipped with R antennas 252a to 252r, where typically T≥1 and R≥1.

[0105] 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 each UE at least in part based on channel quality indicators (CQIs) received from the UEs, process (e.g., encode and modulate) the data for each UE at least in part based on the selected MCS(s) for the 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 to 232t. Each modulator 232 may process the corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may also 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 to 232t may be transmitted via the T antennas 234a to 234t, respectively. According to various aspects described in more detail below, location coding may be utilized to generate synchronization signals to convey additional information.

[0106] 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 also process the input samples (e.g., for OFDM, etc.) to obtain the 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 (if applicable), and provide the 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 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.

[0107] 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 (if applicable) by the TX MIMO processor 266, 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 antennas 234, processed by the demodulator 232, detected (if applicable) by the MIMO detector 236, 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.

[0108] As described in more detail elsewhere herein, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component(s) may perform one or more techniques associated with multi-TCI state communication reporting level capabilities. 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(s) may perform or direct operations of, for example Figure 5 process 500 of Figure 6 process 600 of Figure 5 process 500 of Figure 6 process 600 of

[0109] In some aspects, the UE 120 may include components for determining one or more corresponding maximum levels for one or more transmission configuration indicator (TCI) states of the UE; components for sending information identifying the one or more corresponding maximum levels; components for receiving an indication of the corresponding maximum allowed levels for the one or more TCI states of the UE; components for receiving scheduling information for communications with a slot offset that fails to meet a threshold, where the communications are associated with two or more TCI states, and where each of the two or more TCI states has a level that meets the one or more corresponding maximum levels and the corresponding maximum allowed levels; components for receiving scheduling information for communications with a slot offset that fails to meet a threshold, where the communications are associated with two or more TCI states, and where a TCI state among the two or more TCI states has a level that exceeds the corresponding maximum level indicated by the one or more corresponding maximum levels or the corresponding maximum allowed level for the TCI state; components for treating the scheduling information as invalid at least in part based on the TCI state having a level that exceeds the corresponding maximum level or the corresponding maximum allowed level; components for receiving scheduling information for communications with a slot offset that fails to meet a threshold, where the communications are associated with two or more TCI states, and where each of the two or more TCI states has a level that meets the one or more corresponding maximum levels; components for receiving communications at least in part based on the scheduling information; components for receiving scheduling information for communications with a slot offset that fails to meet a threshold, where the communications are associated with two or more TCI states, and where a TCI state among the two or more TCI states has a level that exceeds the corresponding maximum level indicated by the one or more corresponding maximum levels; components for treating the scheduling information as invalid at least in part based on the TCI state having a level that exceeds the corresponding maximum level; and / or similar components. In some aspects, these components may include one or more components of the UE 120 described in conjunction with Figure 2 such as one or more components of the UE 120 described in conjunction with Figure 2 , such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0110] In some aspects, the base station 110 may include components for receiving information identifying the one or more corresponding maximum levels of a UE for one or more TCI states of the UE; components for sending scheduling information for communications of the UE, where the scheduling information is at least in part based on the one or more corresponding maximum levels; components for sending an indication of the corresponding maximum allowed levels for the one or more TCI states of the UE; and / or similar components. In some aspects, these components may include those described in conjunction with Figure 2One or more components of the described base station 110, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.

[0111] As described above, Figure 2 is provided as an example. Other examples may be different from the example regarding Figure 2 the described example.

[0112] A UE may communicate with one or more transmit-receive points (TRPs) using two or more transmission configuration indicator (TCI) states. A TCI state may indicate a configuration of a beam, such as a quasi-colocation relationship to be used for the beam, spatial information associated with the beam, etc. A UE may communicate with one TRP (e.g., different antenna panels or antenna groups of a TRP) using two or more TCI states, or may communicate with two or more TRPs using a set of TCI states for each of the two or more TRPs. Communication using two or more TCI states may be referred to as multi-TCI state communication or multi-TRP communication (even if the communication using two or more TCI states may be with a single TRP).

[0113] In some aspects, communication with a TRP may carry multiple data streams (referred to as "layers"). For example, multiple-input multiple-output (MIMO) communication may have a single layer or may have multiple layers. The number of layers communicated over a channel between a UE and a TRP is identified by the rank of the channel. For example, if a UE can support four layers in a communication, the UE can support rank four.

[0114] In multi-TCI state communication, the layers of the communication may be distributed in various ways. For example, consider a rank-four communication performed between a UE, a first TRP (TRP1), and a second TRP (TRP2). In this case, the set of possible layer distributions between the first TRP and the second TRP (denoted as [Layers TRP1 , Layers TRP2 ) may be {[4 0][3 1][2 2][1 3][4 0]}. For example, [2 2] may indicate that two layers are sent by the first TRP and two layers are sent by the second TRP. Similar layer distributions may be used for rank-three, rank-two, and rank-one communications.

[0115] The use of analog beamforming (such as in NR frequency range 2 (FR2, as described above)) may impose certain limitations on the rank distribution over multiple TRPs. For example, each analog beam may support a limited number of layers per beam (e.g., at least partially based on the UE's RF chains and how antenna elements (e.g., analog ports) are mapped to digital ports). As a specific example, assume that each TRP uses an analog beam that can support two layers. In this case, for rank four, the set of possible layer distributions represented as [Layers TRP1 , Layers TRP2 can be {[2 2]}. For rank three, the set of possible layer distributions represented as [Layers TRP1 , Layers TRP2 can be {[2 1][1 2]}. Similar layer distributions can be used for rank two and rank one communications. As another specific example, when each TRP uses an analog beam that can support three layers, for rank four, the set of possible layer distributions represented as [Layers TRP1 , Layers TRP2 can be {[3 1][2 2][1 3]}.

[0116] A UE may be configured with multiple possible TCI states. Some TCI states may be configured as default TCI states. Downlink control information (DCI) can be used to indicate one or more TCI states to be used for an analog beam (e.g., using the TCI field of the DCI). For example, in some cases, DCI can be used to dynamically switch the TCI state using the TCI field, while in other cases, the TCI state cannot be dynamically switched (e.g., due to restrictions on the switching time). When dynamic switching of the TCI state is not supported, the UE can use one or more of the default TCI states configured for the UE. This will be described in more detail Figure 3 .

[0117] Using default TCI states when dynamic switching of the TCI state is not supported may impose certain limitations on the rank distribution over multiple TRPs. For example, a base station may use a set of default TCI states to schedule communications with a UE. However, the base station may be restricted regarding how to distribute communication layers between two or more TRPs or between two or more TCI states. For example, a distribution may not be allowed because the distribution is not compatible with the default TCI state, or the distribution may not be available to the UE at least partially based on the UE's capabilities, the UE's channel conditions, etc. If the base station schedules traffic using a layer distribution that is not available or not allowed for the UE, computing resources may be consumed due to traffic loss, insufficient communication performance, etc.

[0118] The techniques and apparatus described herein provide a UE with the maximum rank of each TCI state indicating a default TCI state set. In some aspects, this maximum rank may be the maximum possible rank of the UE (e.g., the maximum rank supported by the UE for the default TCI state). In some aspects, the base station may receive the maximum rank of each TCI state and may indicate the maximum allowed rank of each TCI state (e.g., the maximum rank for the TCI state that may be requested by the UE). When dynamic switching of TCI states is not allowed, such as when the UE is using the default TCI state set, the maximum rank and / or the maximum allowed rank may be used. The UE may provide a channel state information (CSI) report based on the maximum rank and / or the maximum allowed rank, and the BS may schedule communications based on the maximum rank and / or the maximum possible rank. For example, the layer distribution of the communication may not exceed the maximum rank or the maximum possible rank indicated by the UE and the BS.

[0119] In this way, the UE and the BS can determine the maximum rank and / or the maximum allowed rank for the default TCI state of the UE. This may reduce or eliminate the occurrence of scheduled communications having a layer distribution that is not available to the UE or is sub-optimal for the UE, thereby improving the performance of multi-TRP or multi-TCI state communications and improving the utilization of computing resources.

[0120] Figure 3 FIG. is a diagram illustrating an example 300 of a layer distribution for a pair of TCI states in accordance with various aspects of the present disclosure.

[0121] Figure 3 A first scenario 305 where dynamic switching of TCI states is allowed and a second scenario 310 where dynamic switching of TCI states is not allowed are shown. In the first scenario 305, the slot offset K0 satisfies a threshold k. The threshold k may be an integer and may identify the number of slots. Here, the threshold k is 2 slots. The slot offset K0 may be the offset in terms of slots between the DCI and the PDSCH scheduled by the DCI. In some aspects, K0 may be referred to as the slot offset. If K0 is greater than k, the base station may dynamically switch the TCI state using the TCI field of the DCI because the UE has sufficient time to perform the switch before receiving the corresponding PDSCH. In this case, any combination of layer distributions may be used as long as the layer distribution is supported by the analog beam pair corresponding to the allocated TCI state. An example of such a combination of layer distributions is shown.

[0122] In the second scenario 310, K0 fails to satisfy k. In this case, the UE may not have enough time to dynamically switch the TCI state. Therefore, the base station can use one or more of the default TCI states shown in connection with the second scenario 310, and may not be permitted to use TCI states other than one or more default TCI states. In this case, the UE and / or the base station can ignore the TCI field of the DCI. As described in connection with Figure 4 it, the UE can provide information indicating the maximum rank for one or more of the default TCI states shown in Figure 3 . The base station can schedule communication with the UE based on the maximum rank determined by the base station and / or the maximum allowed rank. Therefore, the communication efficiency between the base station and the UE can be improved, thereby improving the utilization rate of computing resources.

[0123] As described above, Figure 3 is provided only as an example. Other examples may be different from the example described with respect to Figure 3 .

[0124] Figure 4 is a diagram illustrating an example 400 of signaling the maximum rank for one or more TCI states. As shown, Figure 4 includes BS 110 and UE 120.

[0125] As Figure 4 and reference numeral 410 show, the UE 120 can provide UE capability information (e.g., UE capability report, etc.) to the BS 110. The UE capability information can indicate whether the UE 120 supports a set of default TCI states for multi-TRP communication.

[0126] As shown by reference numeral 420, the BS 110 can configure multiple TCI states for the UE 120. For example, the BS 110 can provide configuration information (e.g., radio resource control (RRC) information, etc.) for configuring multiple TCI states. The multiple TCI states can include a set of default TCI states. As described in connection with the second scenario 310 of Figure 3 , when the time slot offset K0 fails to satisfy the threshold k, the UE120 and the BS 110 can use one or more of the default TCI states in the set of default TCI states.

[0127] As shown by reference numeral 430, the BS 110 may activate one or more TCI states out of a plurality of TCI states. For example, the BS 110 may use a Media Access Control Control Element (MAC-CE), etc. to activate one or more TCI states. One or more TCI states may include one or more default TCI states out of a plurality of TCI states. The BS 110 may use DCI to switch the UE 120 between the activated TCI states, and when the time slot offset K0 fails to meet the threshold k, the UE 120 may use one or more default TCI states.

[0128] As shown by reference numeral 440, the UE 120 may provide information indicating the maximum level of each default TCI state of one or more default TCI states activated by the BS 110. In some aspects, the UE 120 may provide a corresponding maximum level for each activated default TCI state. In some aspects, the UE 120 may provide a maximum level for a group of multiple default TCI states (such as all default TCI states or a subgroup of default TCI states). In other words, there may be a one-to-one, many-to-one, one-to-many, or many-to-many correspondence between the maximum level and the default TCI state. In some aspects, the UE 120 may determine the maximum level at least partially based on the beam type for the communication link between the UE 120 and the BS 110 (e.g., the type indicating the beam width, such as whether the beam is a wide beam or a narrow beam), the capabilities of the UE 120, the battery condition of the UE 120, the channel condition of the UE 120, the buffer state of the UE 120, etc. The information shown by reference numeral 440 may be provided using RRC signaling, MAC-CE, uplink control information, etc.

[0129] As shown by reference numeral 450, the BS 110 may provide information indicating the maximum allowed level for one or more default TCI states. The maximum allowed level may indicate the maximum level that the UE 120 may use when determining CSI feedback and that the BS 110 may use when scheduling communication with the UE 120. For example, when K0 fails to meet the threshold k, the UE 120 may determine CSI feedback, and the BS 110 may schedule communication on one or more default TCI states according to the maximum level and the maximum allowed level for one or more default TCI states. In some aspects, the BS 110 may not provide information indicating the maximum allowed level, which may save the computing resources of the BS 110 with respect to determining and providing the maximum allowed level. In some aspects, the maximum allowed level of the default TCI state may be less than or equal to the maximum level (determined by the UE 120) of the default TCI state. Information indicating the maximum allowed level may be provided using DCI, RRC signaling, MAC-CE, etc.

[0130] As shown by reference numeral 460, UE 120 may provide a CSI report to BS 110. The CSI report may indicate CSI feedback for a channel between UE 120 and one or more TRPs to be used for multi-TRP communication. For example, the CSI report may include a rank indicator for one or more TRPs. UE 120 may determine the rank indicator based on the maximum rank and / or the maximum allowed rank for one or more default TCI states, where the default TCI state corresponds to one or more CSI reference signals used to determine the CSI feedback. Thus, UE 120 may not request a rank for a default TCI state that exceeds the maximum rank or the maximum allowed rank.

[0131] As shown by reference numeral 470, BS 110 may provide a Physical Downlink Control Channel (PDCCH) to UE 120. The PDCCH may include scheduling information indicating the layer distribution between two or more TCI states and / or two or more TRPs. When the slot offset K0 satisfies a threshold k, the PDCCH does not necessarily conform to the maximum rank or the maximum allowed rank. In this case, the total rank for all TRPs or TCI states may be configured not to exceed the capabilities of UE 120. When the slot offset K0 does not satisfy the threshold k, the layer distribution of two or more TCI states (which may be default TCI states since the slot offset K0 does not satisfy the threshold k) may satisfy the maximum rank and / or the maximum allowed rank (if the maximum allowed rank is configured). If the slot offset K0 does not satisfy the threshold k, and if the rank on the TCI state indicated by the PDCCH exceeds the maximum rank or the maximum allowed rank, UE 120 may consider the PDCCH as invalid signaling. As shown by reference numeral 480, UE 120 may receive a Physical Downlink Shared Channel (PDSCH) associated with the PDCCH. For example, as described above, UE 120 may receive the PDSCH from one or more TRPs using two or more TCI states. As used herein, considering signaling as invalid signaling may include ignoring the signaling, not performing an action at least partially based on the signaling, skipping the monitoring of resources indicated by the signaling, determining not to implement the configuration or other information indicated by the signaling, etc.

[0132] As described above, Figure 4 is provided as an example. Other examples may be different from the example Figure 4 described.

[0133] Figure 5 is a diagram illustrating an example process 500, such as performed by a UE, in accordance with various aspects of the present disclosure. Example process 500 is an example in which a UE (e.g., UE 120, etc.) performs operations associated with reporting the maximum rank for a multi-transmit-receive point configuration.

[0134] AsFigure 5 As shown, in some aspects, process 500 may include determining one or more corresponding maximum levels for one or more transmission configuration indicator (TCI) states of a UE (block 510). For example, as described above, a UE (e.g., using controller / processor 280, etc.) may determine one or more corresponding maximum levels for one or more TCI states of the UE.

[0135] As Figure 5 As further shown, in some aspects, process 500 may include transmitting information identifying one or more corresponding maximum levels (block 520). For example, as described above, a UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may transmit information identifying one or more corresponding maximum levels.

[0136] Process 500 may include additional aspects, such as any individual aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0137] In a first aspect, one or more TCI states are one or more default TCI states of the UE.

[0138] In a second aspect, alone or in combination with the first aspect, process 500 includes receiving information indicating a corresponding maximum allowed level for one or more TCI states of the UE.

[0139] In a third aspect, alone or in combination with one or more of the first and second aspects, the information indicating the corresponding maximum allowed level is received using at least one of downlink control information, radio resource control signaling, or medium access control control element.

[0140] In a fourth aspect, alone or in combination with one or more of the first to third aspects, process 500 includes receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each of the two or more TCI states has a level that meets one or more corresponding maximum levels and corresponding maximum allowed levels.

[0141] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 500 includes receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank that exceeds a corresponding maximum rank indicated by one or more respective maximum ranks or a corresponding maximum allowed rank for the TCI state; and treating the scheduling information as invalid at least in part based on the TCI state having a rank that exceeds the corresponding maximum rank or corresponding maximum allowed rank.

[0142] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, one or more respective maximum ranks indicate corresponding maximum ranks for all default TCI states of a default TCI state set for a UE.

[0143] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, information identifying one or more respective maximum ranks is sent using at least one of uplink control information, radio resource control signaling, or a media access control control element.

[0144] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, process 500 includes receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each TCI state among the two or more TCI states has a rank that meets one or more respective maximum ranks; and receiving the communication at least in part based on the scheduling information.

[0145] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, process 500 includes receiving scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank that exceeds a corresponding maximum rank indicated by one or more respective maximum ranks; and treating the scheduling information as invalid at least in part based on the TCI state having a rank that exceeds the corresponding maximum rank.

[0146] Although Figure 5 illustrative blocks of process 500 are shown, in some aspects, process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks compared to those depicted in Figure 5 Additionally or alternatively, two or more blocks in process 500 may be executed in parallel.

[0147] Figure 6FIG. is a diagram illustrating an example process 600, such as may be performed by a base station, in accordance with various aspects of the present disclosure. Example process 600 is an example of operations performed by a base station (e.g., BS 110, etc.) associated with reporting rank capabilities for a multi-transmit-receive point configuration.

[0148] As Figure 6 shown, in some aspects, process 600 may include receiving information identifying one or more respective maximum ranks for one or more TCI states for a UE (block 610). For example, as described above, a base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) may receive information identifying one or more respective maximum ranks for a UE for one or more TCI states.

[0149] As Figure 6 further shown, in some aspects, process 600 may include transmitting scheduling information for communication for the UE, where the scheduling information is at least partially based on the one or more respective maximum ranks (block 620). For example, as described above, a base station (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) may transmit scheduling information for communication for the UE. In some aspects, the scheduling information is at least partially based on the one or more respective maximum ranks.

[0150] Process 600 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.

[0151] In a first aspect, the one or more TCI states include one or more default TCI states.

[0152] In a second aspect, alone or in combination with the first aspect, process 600 includes transmitting information indicating a respective maximum allowed rank for one or more TCI states for the UE.

[0153] In a third aspect, alone or in combination with one or more of the first and second aspects, the information indicating the respective maximum allowed rank is transmitted using at least one of downlink control information, radio resource control signaling, or a medium access control control element.

[0154] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the communication has a slot offset that fails to meet a threshold, the communication is associated with two or more TCI states, and each TCI state of the two or more TCI states has a rank that meets one or more respective maximum ranks and respective maximum allowed ranks.

[0155] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, one or more corresponding maximum levels include the corresponding maximum levels for all default TCI states of a default TCI state set for a UE.

[0156] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, information identifying one or more corresponding maximum levels is sent using at least one of uplink control information, radio resource control signaling, or medium access control control elements.

[0157] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, a communication has a slot offset that fails to meet a threshold, the communication is associated with two or more TCI states, and each TCI state among the two or more TCI states has a level that meets one or more corresponding maximum levels.

[0158] While Figure 6 illustrative example boxes of process 600 are shown, in some aspects, process 600 may include additional boxes, fewer boxes, different boxes, or boxes arranged differently from those depicted in Figure 6 Additionally or alternatively, two or more boxes in process 600 may be executed in parallel.

[0159] Figure 7 is a conceptual data flow diagram 700 illustrating the data flow between different modules / components / assemblies in an illustrative example device 702. The device 702 may be a UE (e.g., UE 120). In some aspects, the device 702 includes a receiving component 704, a determining component 706, and / or a transmitting component 708.

[0160] The receiving component 704 may receive a signal 712 from the BS 750. The signal 712 may include information indicating or configuring multiple TCI states, a MAC-CE activating a set of TCI states, a maximum allowed level for a TCI state, a PDCCH, a PDSCH, a CSI reference signal, etc.

[0161] The determining component 706 may determine the maximum levels for one or more TCI states (such as one or more default TCI states). In some aspects, the determining component 706 may perform the determination at least in part based on data 714 received from the receiving component 704. For example, the data 714 may include information about channel conditions, which TCI states are activated, etc. The determining component 706 may provide data 716 to the transmitting component 708. The data 716 may indicate one or more maximum levels. The transmitting component 708 may send information identifying one or more maximum levels as a signal 718 to the BS 750.

[0162] In some aspects, a receiving component 704 may provide data 720 to a determining component 706. The data 720 may include scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank that exceeds a corresponding maximum rank indicated by one or more respective maximum ranks or a corresponding maximum allowed rank for the TCI state. The determining component 706 may consider the scheduling information invalid at least in part based on the TCI state having a rank that exceeds the corresponding maximum rank or the corresponding maximum allowed rank.

[0163] Apparatus 702 may include additional components such as each of the blocks that execute the algorithms in the foregoing process 500. Figure 5 Each block, etc. of the foregoing process 500 may be executed by a component, and the apparatus may include one or more of these components. The components may be one or more hardware components specifically configured to execute the described process / algorithm, may be implemented by a processor configured to execute the described process / algorithm, may be stored within a computer-readable medium for implementation by a processor, or some combination thereof. Figure 5 The number and arrangement of the components shown in

[0164] are provided as an example. In fact, there may be additional components, fewer components, different components, or a different arrangement of components compared to the components shown in

[0164] . Additionally,

[0164] Figure 7 two or more of the components shown in Figure 7 may be implemented within a single component, or Figure 7 a single component shown in Figure 7 may 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 may perform one or more functions described as being performed by Figure 7 another set of components shown in Figure 7 . Figure 7 Figure 7 Figure 7 Figure 7

[0165] Figure 8 FIG. 800 is a conceptual data flow diagram showing the data flow between different modules / components / elements in an example apparatus 802. The apparatus 802 may be a BS (e.g., BS 110). In some aspects, the apparatus 802 includes a receiving component 804 and / or a transmitting component 806. In some aspects, the apparatus 802 includes a determining component 814.

[0166] The receiving component 804 can receive a signal 808 from the UE 850. The signal 808 can include information identifying one or more corresponding maximum levels for one or more TCI states for the UE 850. The receiving component 804 can provide data 810 indicating the one or more corresponding maximum levels to the transmitting component 806. The transmitting component 806 can send a signal 812 to the UE 850. The signal 812 can include scheduling information for the communication of the UE 850, where the scheduling information is at least partially based on the one or more corresponding maximum levels. In some aspects, the signal 812 can include information indicating the corresponding maximum allowed levels for one or more TCI states for the UE 850. In some aspects, the determining component 814 of the apparatus 802 can determine the corresponding maximum allowed levels and / or the scheduling information, for example, at least partially based on the data 810.

[0167] The apparatus 802 can include additional components such as each of the blocks that execute the algorithms in the foregoing process 600. Figure 6 Each block, such as in the foregoing process 600, can be executed by a component, and the apparatus can include one or more of these components. The components can be one or more hardware components specifically configured to execute the stated process / algorithm, can be implemented by a processor configured to execute the stated process / algorithm, can be stored within a computer-readable medium for implementation by a processor, or some combination thereof. Figure 6 The number and arrangement of the components shown in [ ] are provided as an example. In fact, compared with the components shown in [ ], there can be additional components, fewer components, different components, or components in a different arrangement. Additionally,

[0168] Figure 8 two or more components shown in [ ] can be implemented within a single component, or Figure 8 a single component shown in [ ] can be implemented as multiple distributed components. Additionally or alternatively, Figure 8 a set of components (e.g., one or more components) shown in [ ] can perform one or more functions described as being performed by Figure 8 another set of components shown in [ ]. Figure 8 Figure 8

[0169] 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 from the practice of the aspects.

[0170]

[0171] The term "component" as used herein is intended to be broadly construed as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and / or a combination of hardware and software.

[0171] As used herein, depending on context, meeting a threshold can refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc.

[0172] It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware, firmware, and / or combinations of hardware and software. The actual specific control hardware or software code for implementing these systems and / or methods is not limited to these aspects. Accordingly, the operations and behavior of the systems and / or methods are described herein without reference to specific software code—it should be understood that software and hardware can be designed to implement the systems and / or methods at least in part based on the description herein.

[0173] Although specific combinations of features are set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features can be combined in ways not specifically set forth in the claims and / or not specifically disclosed in the specification. While each dependent claim listed below may directly depend on only one claim, the disclosure of the various aspects includes the combination of each dependent claim with every other claim in the claim set. A phrase referring to “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 having multiple of the same element (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 permutation of a, b, and c).

[0174] Unless explicitly described, any element, act, or indication used herein should not be construed as critical or essential. Additionally, the articles “a” and “an” as used herein are intended to include one or more items and can be used interchangeably with “one or more.” Further, the terms “set” and “group” as used herein are intended to include one or more items (e.g., combinations of related items, unrelated items, related and unrelated items, etc.) and can be used interchangeably with “one or more.” The phrase “only one” or similar language is used where only one item is intended. Additionally, the terms “has,” “have,” “having,” etc. as used herein are intended to be open - ended terms. Further, unless otherwise explicitly stated, the phrase “based on” is intended to mean “at least partially based on.”

Claims

1. 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: determine one or more respective maximum levels for one or more transmission configuration indicator (TCI) states of the UE, wherein the one or more respective maximum levels indicate respective maximum levels for all default TCI states of a default TCI state set of the UE; send information identifying the one or more respective maximum levels; and receive information indicating respective maximum allowed levels for the one or more TCI states of the UE.

2. The UE according to claim 1, wherein The one or more TCI states are one or more default TCI states of the UE.

3. The UE according to claim 1, wherein The information indicating the respective maximum allowed levels is received using at least one of the following: downlink control information, radio resource control signaling, or media access control control element.

4. The UE according to claim 1, wherein, The one or more processors are further configured to: receive scheduling information for a communication having a slot offset that fails to meet a threshold, wherein the communication is associated with two or more TCI states, and wherein each TCI state of the two or more TCI states has a level that meets the one or more respective maximum levels and the respective maximum allowed levels.

5. The UE according to claim 1, wherein, The one or more processors are further configured to: receive scheduling information for a communication having a slot offset that fails to meet a threshold, wherein the communication is associated with two or more TCI states, and wherein a TCI state of the two or more TCI states has a level that exceeds a corresponding maximum level indicated by the one or more respective maximum levels or a corresponding maximum allowed level for the TCI state; and regard the scheduling information as invalid at least in part based on the TCI state having a level that exceeds the corresponding maximum level or the corresponding maximum allowed level.

6. The UE according to claim 1, wherein, The information identifying the one or more respective maximum levels is sent using at least one of the following: uplink control information, radio resource control signaling, or media access control control element.

7. The UE according to claim 1, wherein The one or more processors are further configured to: receive scheduling information for a communication having a slot offset that fails to meet a threshold, wherein the communication is associated with two or more TCI states, and wherein each TCI state of the two or more TCI states has a level that meets the one or more respective maximum levels; and receive the communication at least in part based on the scheduling information.

8. The UE according to claim 1, wherein, The one or more processors are further configured to: receive scheduling information for a communication having a slot offset that fails to meet a threshold, wherein the communication is associated with two or more TCI states, and wherein a TCI state of the two or more TCI states has a level that exceeds a corresponding maximum level indicated by the one or more respective maximum levels; and regard the scheduling information as invalid at least in part based on the TCI state having a level that exceeds the corresponding maximum level.

9. A network entity 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 information identifying one or more respective maximum levels of the user equipment (UE) for one or more transmission configuration indicator (TCI) states for the UE, wherein the one or more respective maximum levels include the respective maximum levels for all default TCI states of a default TCI state set for the UE; send scheduling information for communication for the UE, wherein the scheduling information is at least partially based on the one or more respective maximum levels; and send information indicating respective maximum allowed levels for the one or more TCI states for the UE.

10. The network entity according to claim 9, wherein, The one or more TCI states include one or more default TCI states.

11. The network entity according to claim 9, wherein, The information indicating the respective maximum allowed levels is sent using at least one of the following: downlink control information, radio resource control signaling, or medium access control control element.

12. The network entity according to claim 9, wherein, The communication has a slot offset that fails to meet a threshold, wherein the communication is associated with two or more TCI states, and wherein each TCI state of the two or more TCI states has a level that meets the one or more respective maximum levels and the respective maximum allowed levels.

13. The network entity according to claim 9, wherein, The information identifying the one or more respective maximum levels is sent using at least one of the following: uplink control information, radio resource control signaling, or medium access control control element.

14. The network entity according to claim 9, wherein, The communication has a slot offset that fails to meet a threshold, wherein the communication is associated with two or more TCI states, and wherein each TCI state of the two or more TCI states has a level that meets the one or more respective maximum levels.

15. A method of wireless communication performed by a user equipment (UE), comprising: determining one or more respective maximum levels for one or more transmission configuration indicator (TCI) states for the UE, wherein the one or more respective maximum levels include the respective maximum levels for all default TCI states of a default TCI state set for the UE; sending information identifying the one or more respective maximum levels; and receiving information indicating respective maximum allowed levels for the one or more TCI states for the UE.

16. The method according to claim 15, wherein, The one or more TCI states are one or more default TCI states of the UE.

17. The method according to claim 15, further comprising: receiving scheduling information for a communication having a slot offset that fails to meet a threshold, wherein the communication is associated with two or more TCI states, and wherein each TCI state of the two or more TCI states has a level that meets the one or more respective maximum levels and the respective maximum allowed levels.

18. The method according to claim 15, further comprising: Receive scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank exceeding a corresponding maximum rank indicated by the one or more respective maximum ranks or a corresponding maximum allowed rank for the TCI state; And At least partially based on the TCI state having a rank exceeding the corresponding maximum rank or the corresponding maximum allowed rank, consider the scheduling information invalid.

19. The method according to claim 15, wherein The one or more respective maximum ranks indicate the respective maximum ranks for all default TCI states of a default TCI state set for the UE.

20. The method according to claim 15, further comprising: Receive scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each TCI state among the two or more TCI states has a rank that meets the one or more respective maximum ranks; And Receive the communication at least partially based on the scheduling information.

21. The method according to claim 15, further comprising: Receive scheduling information for a communication having a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where a TCI state among the two or more TCI states has a rank exceeding a corresponding maximum rank indicated by the one or more respective maximum ranks; And At least partially based on the TCI state having a rank exceeding the corresponding maximum rank, consider the scheduling information invalid.

22. A method of wireless communication performed by a network entity, comprising: Receive information identifying one or more respective maximum ranks of one or more transmission configuration indicator (TCI) states for a user equipment (UE), where the one or more respective maximum ranks include the respective maximum ranks for all default TCI states of a default TCI state set for the UE; Transmit scheduling information for a communication for the UE, where the scheduling information is at least partially based on the one or more respective maximum ranks; and Transmit information indicating a corresponding maximum allowed rank for the one or more TCI states for the UE.

23. The method according to claim 22, wherein, The one or more TCI states include one or more default TCI states.

24. The method according to claim 22, wherein, The communication has a slot offset that fails to meet a threshold, where the communication is associated with two or more TCI states, and where each TCI state among the two or more TCI states has a rank that meets the one or more respective maximum ranks and the corresponding maximum allowed rank.

25. An apparatus for wireless communication to be performed at a user equipment UE, the apparatus comprising components for performing the method according to any one of claims 15-21.

26. An apparatus for wireless communication to be performed at a network entity, the apparatus comprising components for performing the method according to any one of claims 22-24.

27. A computer-readable medium having recorded thereon one or more computer instructions which, when executed by one or more processors of a user equipment UE, cause the one or more processors to perform the method according to any one of claims 15-21.

28. A computer-readable medium having recorded thereon one or more computer instructions which, when executed by one or more processors of a network entity, cause the one or more processors to perform the method according to any one of claims 22-24.

29. A computer program product comprising one or more computer instructions which, when executed by one or more processors of a user equipment UE, cause the one or more processors to perform the method according to any one of claims 15-21.

30. A computer program product comprising one or more computer instructions which, when executed by one or more processors of a network entity, cause the one or more processors to perform the method according to any one of claims 22-24.

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