Mac-ce for PL offset update in asymmetric DL and ul
The introduction of MAC-CEs with specific field arrangements addresses the challenge of updating PL offsets for TCI states in 5G NR, enhancing communication efficiency and reliability in asymmetric scenarios.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2025-01-14
- Publication Date
- 2026-07-23
AI Technical Summary
Existing wireless communication systems, particularly 5G NR, face challenges in efficiently updating pathloss (PL) offsets for transmission configuration indicator (TCI) states, especially in asymmetric downlink and uplink scenarios, which can impact communication efficiency and reliability.
The introduction of various types of medium access control (MAC) control elements (MAC-CEs) with specific field arrangements to facilitate PL offset updates for activated and non-activated TCI states, including fixed and variable sizes, bitmaps, and separate groups of PL offset fields, enabling flexible and efficient communication.
Enhances communication efficiency and reliability by providing flexible and efficient PL offset updates for TCI states, improving network performance in asymmetric scenarios.
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Figure CN2025072185_23072026_PF_FP_ABST
Abstract
Description
MAC-CE FOR PL OFFSET UPDATE IN ASYMMETRIC DL AND ULTECHNICAL FIELD
[0001] The present disclosure relates generally to communication systems, and more particularly, to wireless communication systems with transmission configuration indicator (TCI) . INTRODUCTION
[0002] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. 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, and time division synchronous code division multiple access (TD-SCDMA) systems.
[0003] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR) . 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB) , massive machine type communications (mMTC) , and ultra-reliable low latency communications (URLLC) . Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. BRIEF SUMMARY
[0004] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects. This summary neither identifies key or critical elements of all aspects nor delineates the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
[0005] In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus at a user equipment (UE) are provided. The apparatus may include at least one memory and at least one processor coupled to the at least one memory. Based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to (e.g., cause the UE to) receive, from a network entity, a medium access control (MAC) control element (MAC-CE) with a fixed size or a variable size indicating a first quantity of a set of transmission configuration indicator (TCI) state fields and a second quantity of a set of pathloss (PL) offset fields based on an order, where the variable size is based on the first quantity of the set of TCI state fields and the second quantity of the set of PL offset fields. Based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to communicate with the network entity based on the MAC-CE.
[0006] In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus at a UE are provided. The apparatus may include at least one memory and at least one processor coupled to the at least one memory. Based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to (e.g., cause the UE to) receive, from a network entity, a MAC-CE including a first set of PL offset fields associated with a first set of TCI state identifiers (IDs) of activated TCI states and a second set of PL offset fields associated with a second set of TCI state IDs of non-activated TCI states, where the MAC-CE includes the second set of TCI state IDs without the first set of TCI state IDs. Based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to communicate with the network entity based on the MAC-CE.
[0007] In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus at a UE are provided. The apparatus may include at least one memory and at least one processor coupled to the at least one memory. Based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to (e.g., cause the UE to) receive, from a network entity, a MAC-CE including a first set of PL offset fields associated with a first set of TCI states and a bitmap that indicates a presence of the first set of PL offset fields and an absence of a second set of PL offset fields associated with a second set of TCI states. Based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to communicate with the network entity based on the MAC-CE.
[0008] To the accomplishment of the foregoing and related ends, the one or more aspects include the features hereinafter fully described and particularly pointed out in the claims. The following description and the drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
[0010] FIG. 2A is a diagram illustrating an example of a first frame, in accordance with various aspects of the present disclosure.
[0011] FIG. 2B is a diagram illustrating an example of downlink (DL) channels within a subframe, in accordance with various aspects of the present disclosure.
[0012] FIG. 2C is a diagram illustrating an example of a second frame, in accordance with various aspects of the present disclosure.
[0013] FIG. 2D is a diagram illustrating an example of uplink (UL) channels within a subframe, in accordance with various aspects of the present disclosure.
[0014] FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
[0015] FIG. 4 is a diagram illustrating an example of a set of UL reception (RX) points, a macro node, and a UE.
[0016] FIG. 5 is a diagram illustrating a first example medium access control (MAC) control element (MAC-CE) where the transmission configuration indicator (TCI) state identifier (ID) fields and pathloss (PL) offset fields are mapped to consecutive bits of the Octets in the MAC-CE and a second example MAC-CE where each TCI state ID field and each PL offset field are mapped to a respective Octet, where the TCI state fields and PL offset fields are interlacedly mapped to the Octets in the MAC-CE.
[0017] FIG. 6 is a diagram illustrating a first example MAC-CE where the TCI state ID fields and PL offset fields are mapped to consecutive bits of the Octets in the MAC-CE and a second example MAC-CE where each TCI state ID field and each PL offset field are mapped to a respective Octet, where TCI state fields are first mapped to the earlier Octets in the MAC-CE and then the PL offset fields are mapped to the later Octets in the MAC-CE.
[0018] FIG. 7 is a diagram illustrating example MAC-CEs where a field Ci is used to indicate whether PL offset corresponding TCI state IDi is updated or not.
[0019] FIG. 8 is a diagram illustrating example MAC-CEs where a field indicates presence of TCI state ID fields or PL offset fields.
[0020] FIG. 9 is a diagram illustrating example MAC-CEs of variable sizes where a field Ci indicates the presence of (i+1) TCI state IDi+1 and corresponding PLOi+1.
[0021] FIG. 10 is a diagram illustrating example MAC-CEs.
[0022] FIG. 11 is a diagram illustrating example MAC-CEs where two groups of PL offset fields are included in the MAC-CE.
[0023] FIG. 12 is a diagram illustrating an example MAC-CE with two groups of PL offsets and supports both the first version of TCI state and the second version of TCI state.
[0024] FIG. 13 is a diagram illustrating another example MAC-CE with two groups of PL offsets and supports both the first version of TCI state and the second version of TCI state.
[0025] FIG. 14 is a diagram illustrating example separate MAC-CEs with two groups of PL offsets.
[0026] FIG. 15 is a diagram illustrating example separate MAC-CEs with two groups of PL offsets.
[0027] FIG. 16 is a diagram illustrating an example MAC-CE with one bit to indicate whether a common offset is applied / updated to all configured joint / UL TCI states.
[0028] FIG. 17 is a diagram illustrating example communications between a network node and a UE in accordance with various aspects of the present disclosure.
[0029] FIG. 18 is a flowchart of a method of wireless communication in accordance with various aspects of the present disclosure.
[0030] FIG. 19 is a flowchart of a method of wireless communication in accordance with various aspects of the present disclosure.
[0031] FIG. 20 is a flowchart of a method of wireless communication in accordance with various aspects of the present disclosure.
[0032] FIG. 21 is a diagram illustrating an example of a hardware implementation for an example apparatus and / or network entity in accordance with various aspects of the present disclosure.DETAILED DESCRIPTION
[0033] The detailed description set forth below in connection with the drawings describes various configurations and does not represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.
[0034] To facilitate update of pathloss (PL) offset value for configured transmission configuration indicator (TCI) states that may not be activated, aspects provided herein may introduce different types of medium access control (MAC) control elements (MAC-CEs) where the MAC-CE may include other information, with fields arranged in particular formats, and applicable for various different cases (e.g., joint separate TCI state, a first version of unified TCI or a second version of unified TCI, and the like) .
[0035] Several aspects of telecommunication systems are presented with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0036] By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes one or more processors. When multiple processors are implemented, the multiple processors may perform the functions individually or in combination. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination thereof. One or more processors in the processing system may execute software to cause a device that includes the one or more processors to perform the various functionality described throughout this disclosure.
[0037] Accordingly, in one or more example aspects, implementations, and / or use cases, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, such computer-readable media can include a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer (e.g., transitory or non-transitory medium that may be accessed by computer) .
[0038] While aspects, implementations, and / or use cases are described in this application by illustration to some examples, additional or different aspects, implementations and / or use cases may come about in many different arrangements and scenarios. Aspects, implementations, and / or use cases described herein may be implemented across many differing platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, aspects, implementations, and / or use cases may come about via integrated chip implementations and other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, artificial intelligence (AI) -enabled devices, etc. ) . While some examples may or may not be specifically directed to use cases or applications, a wide assortment of applicability of described examples may occur. Aspects, implementations, and / or use cases may range a spectrum from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregate, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more techniques herein. In some practical settings, devices incorporating described aspects and features may also include additional components and features for implementation and practice of claimed and described aspect. For example, transmission and reception of wireless signals necessarily includes a number of components for analog and digital purposes (e.g., hardware components including antenna, RF-chains, power amplifiers, modulators, buffer, processor (s) , interleaver, adders / summers, etc. ) . Techniques described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc. of varying sizes, shapes, and constitution.
[0039] Deployment of communication systems, such as 5G NR systems, may be arranged in multiple manners with various components or constituent parts. In a 5G NR system, or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element, or a network equipment, such as a base station (BS) , or one or more units (or one or more components) performing base station functionality, may be implemented in an aggregated or disaggregated architecture. For example, a BS (such as a Node B (NB) , evolved NB (eNB) , NR BS, 5G NB, access point (AP) , a transmission reception point (TRP) , or a cell, etc. ) may be implemented as an aggregated base station (also known as a standalone BS or a monolithic BS) or a disaggregated base station.
[0040] An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. A disaggregated base station may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more central or centralized units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) . In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other RAN nodes. The DUs may be implemented to communicate with one or more RUs. Each of the CU, DU and RU can be implemented as virtual units, i.e., a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) .
[0041] Base station operation or network design may consider aggregation characteristics of base station functionality. For example, disaggregated base stations may be utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (such as the network configuration sponsored by the O-RAN Alliance) ) , or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN) ) . Disaggregation may include distributing functionality across two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network design. The various units of the disaggregated base station, or disaggregated RAN architecture, can be configured for wired or wireless communication with at least one other unit.
[0042] FIG. 1 is a diagram 100 illustrating an example of a wireless communications system and an access network. The illustrated wireless communications system includes a disaggregated base station architecture. The disaggregated base station architecture may include one or more CUs 110 that can communicate directly with a core network 120 via a backhaul link, or indirectly with the core network 120 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 125 via an E2 link, or a Non-Real Time (Non-RT) RIC 115 associated with a Service Management and Orchestration (SMO) Framework 105, or both) . A CU 110 may communicate with one or more DUs 130 via respective midhaul links, such as an F1 interface. The DUs 130 may communicate with one or more RUs 140 via respective fronthaul links. The RUs 140 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, the UE 104 may be simultaneously served by multiple RUs 140.
[0043] Each of the units, i.e., the CUs 110, the DUs 130, the RUs 140, as well as the Near-RT RICs 125, the Non-RT RICs 115, and the SMO Framework 105, may include one or more interfaces or be coupled to one or more interfaces configured to receive or to transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or to transmit signals over a wired transmission medium to one or more of the other units. Additionally, the units can include a wireless interface, which may include a receiver, a transmitter, or a transceiver (such as an RF transceiver) , configured to receive or to transmit signals, or both, over a wireless transmission medium to one or more of the other units.
[0044] In some aspects, the CU 110 may host one or more higher layer control functions. Such control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 110. The CU 110 may be configured to handle user plane functionality (i.e., Central Unit –User Plane (CU-UP) ) , control plane functionality (i.e., Central Unit –Control Plane (CU-CP) ) , or a combination thereof. In some implementations, the CU 110 can be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as an E1 interface when implemented in an O-RAN configuration. The CU 110 can be implemented to communicate with the DU 130, as necessary, for network control and signaling.
[0045] The DU 130 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 140. In some aspects, the DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation, demodulation, or the like) depending, at least in part, on a functional split, such as those defined by 3GPP. In some aspects, the DU 130 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 130, or with the control functions hosted by the CU 110.
[0046] Lower-layer functionality can be implemented by one or more RUs 140. In some deployments, an RU 140, controlled by a DU 130, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU (s) 140 can be implemented to handle over the air (OTA) communication with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU (s) 140 can be controlled by the corresponding DU 130. In some scenarios, this configuration can enable the DU (s) 130 and the CU 110 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0047] The SMO Framework 105 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 105 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements that may be managed via an operations and maintenance interface (such as an O1 interface) . For virtualized network elements, the SMO Framework 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) . Such virtualized network elements can include, but are not limited to, CUs 110, DUs 130, RUs 140 and Near-RT RICs 125. In some implementations, the SMO Framework 105 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 111, via an O1 interface. Additionally, in some implementations, the SMO Framework 105 can communicate directly with one or more RUs 140 via an O1 interface. The SMO Framework 105 also may include a Non-RT RIC 115 configured to support functionality of the SMO Framework 105.
[0048] The Non-RT RIC 115 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updates, or policy-based guidance of applications / features in the Near-RT RIC 125. The Non-RT RIC 115 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 125. The Near-RT RIC 125 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 110, one or more DUs 130, or both, as well as an O-eNB, with the Near-RT RIC 125.
[0049] In some implementations, to generate AI / ML models to be deployed in the Near-RT RIC 125, the Non-RT RIC 115 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 125 and may be received at the SMO Framework 105 or the Non-RT RIC 115 from non-network data sources or from network functions. In some examples, the Non-RT RIC 115 or the Near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 115 may monitor long-term trends and patterns for performance and employ AI / ML models to perform corrective actions through the SMO Framework 105 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
[0050] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Accordingly, a base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component indicated with dotted lines to signify that each component may or may not be included in the base station 102) . The base station 102 provides an access point to the core network 120 for a UE 104. The base station 102 may include macrocells (high power cellular base station) and / or small cells (low power cellular base station) . The small cells include femtocells, picocells, and microcells. A network that includes both small cell and macrocells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) . The communication links between the RUs 140 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to an RU 140 and / or downlink (DL) (also referred to as forward link) transmissions from an RU 140 to a UE 104. The communication links may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication links may be through one or more carriers. The base station 102 / UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL) . The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
[0051] Certain UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL / UL wireless wide area network (WWAN) spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) . D2D communication may be through a variety of wireless D2D communications systems, such as for example, BluetoothTM (Bluetooth is a trademark of the Bluetooth Special Interest Group (SIG) ) , Wi-FiTM (Wi-Fi is a trademark of the Wi-Fi Alliance) based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.
[0052] The wireless communications system may further include a Wi-Fi AP 150 in communication with UEs 104 (also referred to as Wi-Fi stations (STAs) ) via communication link 154, e.g., in a 5 GHz unlicensed frequency spectrum or the like. When communicating in an unlicensed frequency spectrum, the UEs 104 / AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
[0053] The electromagnetic spectrum is often subdivided, based on frequency / wavelength, into various classes, bands, channels, etc. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
[0054] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz –24.25 GHz) . Frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend features of FR1 and / or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6 GHz –71 GHz) , FR4 (71 GHz –114.25 GHz) , and FR5 (114.25 GHz –300 GHz) . Each of these higher frequency bands falls within the EHF band.
[0055] With the above aspects in mind, unless specifically stated otherwise, the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2, and / or FR5, or may be within the EHF band.
[0056] The base station 102 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming. The base station 102 may transmit a beamformed signal 182 to the UE 104 in one or more transmit directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more receive directions. The UE 104 may also transmit a beamformed signal 184 to the base station 102 in one or more transmit directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 102 / UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 102 / UE 104. The transmit and receive directions for the base station 102 may or may not be the same. The transmit and receive directions for the UE 104 may or may not be the same.
[0057] The base station 102 may include and / or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a TRP, network node, network entity, network equipment, or some other suitable terminology. The base station 102 can be implemented as an integrated access and backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station with a baseband unit (BBU) (including a CU and a DU) and an RU, or as a disaggregated base station including one or more of a CU, a DU, and / or an RU. The set of base stations, which may include disaggregated base stations and / or aggregated base stations, may be referred to as next generation (NG) RAN (NG-RAN) .
[0058] The core network 120 may include an Access and Mobility Management Function (AMF) 161, a Session Management Function (SMF) 162, a User Plane Function (UPF) 163, a Unified Data Management (UDM) 164, one or more location servers 168, and other functional entities. The AMF 161 is the control node that processes the signaling between the UEs 104 and the core network 120. The AMF 161 supports registration management, connection management, mobility management, and other functions. The SMF 162 supports session management and other functions. The UPF 163 supports packet routing, packet forwarding, and other functions. The UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identification handling, access authorization, and subscription management. The one or more location servers 168 are illustrated as including a Gateway Mobile Location Center (GMLC) 165 and a Location Management Function (LMF) 166. However, generally, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, the LMF 166, a position determination entity (PDE) , a serving mobile location center (SMLC) , a mobile positioning center (MPC) , or the like. The GMLC 165 and the LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) for accessing UE positioning information. The LMF 166 receives measurements and assistance information from the NG-RAN and the UE 104 via the AMF 161 to compute the position of the UE 104. The NG-RAN may utilize one or more positioning methods in order to determine the position of the UE 104. Positioning the UE 104 may involve signal measurements, a position estimate, and an optional velocity computation based on the measurements. The signal measurements may be made by the UE 104 and / or the base station 102 serving the UE 104. The signals measured may be based on one or more of a satellite positioning system (SPS) 170 (e.g., one or more of a Global Navigation Satellite System (GNSS) , global position system (GPS) , non-terrestrial network (NTN) , or other satellite position / location system) , LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS) , sensor-based information (e.g., barometric pressure sensor, motion sensor) , NR enhanced cell ID (NR E-CID) methods, NR signals (e.g., multi-round trip time (Multi-RTT) , DL angle-of-departure (DL-AoD) , DL time difference of arrival (DL-TDOA) , UL time difference of arrival (UL-TDOA) , and UL angle-of-arrival (UL-AoA) positioning) , and / or other systems / signals / sensors.
[0059] Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similar functioning device. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) . The UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. In some scenarios, the term UE may also apply to one or more companion devices such as in a device constellation arrangement. One or more of these devices may collectively access the network and / or individually access the network.
[0060] Referring again to FIG. 1, in some aspects, the UE 104 may include a MAC-CE component 198. In some aspects, the MAC-CE component 198 may be configured to receive, from a network entity, a medium access control (MAC) control element (MAC-CE) with a fixed size or a variable size indicating a first quantity of a set of transmission configuration indicator (TCI) state fields and a second quantity of a set of pathloss (PL) offset fields based on an order, where the variable size is based on the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields. In some aspects, the MAC-CE component 198 may be further configured to communicate with the network entity based on the MAC-CE.
[0061] In some aspects, the MAC-CE component 198 may be configured to receive, from a network entity, a MAC-CE including a first set of PL offset fields associated with a first set of TCI state identifiers (IDs) of activated TCI states and a second set of PL offset fields associated with a second set of TCI state IDs of non-activated TCI states, where the MAC-CE includes the second set of TCI state IDs without the first set of TCI state IDs. In some aspects, the MAC-CE component 198 may be further configured to communicate with the network entity based on the MAC-CE.
[0062] In some aspects, the MAC-CE component 198 may be configured to receive, from a network entity, a MAC-CE including a first set of PL offset fields associated with a first set of TCI states and a bitmap that indicates a presence of the first set of PL offset fields and an absence of a second set of PL offset fields associated with a second set of TCI states. In some aspects, the MAC-CE component 198 may be further configured to communicate with the network entity based on the MAC-CE.
[0063] Although the following description may be focused on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.
[0064] As described herein, a node (which may be referred to as a node, a network node, a network entity, or a wireless node) may include, be, or be included in (e.g., be a component of) a base station (e.g., any base station described herein) , a UE (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, an integrated access and backhauling (IAB) node, a distributed unit (DU) , a central unit (CU) , a remote / radio unit (RU) (which may also be referred to as a remote radio unit (RRU) ) , and / or another processing entity configured to perform any of the techniques described herein. For example, a network node may be a UE. As another example, a network node may be a base station or network entity. As another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a UE. In another aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a base station. In yet other aspects of this example, the first, second, and third network nodes may be different relative to these examples. Similarly, reference to a UE, base station, apparatus, device, computing system, or the like may include disclosure of the UE, base station, apparatus, device, computing system, or the like being a network node. For example, disclosure that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node. Consistent with this disclosure, once a specific example is broadened in accordance with this disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node) , the broader example of the narrower example may be interpreted in the reverse, but in a broad open-ended way. In the example above where a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node, the first network node may refer to a first UE, a first base station, a first apparatus, a first device, a first computing system, a first set of one or more one or more components, a first processing entity, or the like configured to receive the information; and the second network node may refer to a second UE, a second base station, a second apparatus, a second device, a second computing system, a second set of one or more components, a second processing entity, or the like.
[0065] As described herein, communication of information (e.g., any information, signal, or the like) may be described in various aspects using different terminology. Disclosure of one communication term includes disclosure of other communication terms. For example, a first network node may be described as being configured to transmit information to a second network node. In this example and consistent with this disclosure, disclosure that the first network node is configured to transmit information to the second network node includes disclosure that the first network node is configured to provide, send, output, communicate, or transmit information to the second network node. Similarly, in this example and consistent with this disclosure, disclosure that the first network node is configured to transmit information to the second network node includes disclosure that the second network node is configured to receive, obtain, or decode the information that is provided, sent, output, communicated, or transmitted by the first network node.
[0066] FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure. FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure. FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by FIGs. 2A, 2C, the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL) , where D is DL, U is UL, and F is flexible for use between DL / UL, and subframe 3 being configured with slot format 1 (with all UL) . While subframes 3, 4 are shown with slot formats 1, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI) , or semi-statically / statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) . Note that the description infra applies also to a 5G NR frame structure that is TDD.
[0067] FIGs. 2A-2D illustrate a frame structure, and the aspects of the present disclosure may be applicable to other wireless communication technologies, which may have a different frame structure and / or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms) . Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For normal CP, each slot may include 14 symbols, and for extended CP, each slot may include 12 symbols. The symbols on DL may be CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (for power limited scenarios; limited to a single stream transmission) . The number of slots within a subframe is based on the CP and the numerology. The numerology defines the subcarrier spacing (SCS) (see Table 1) . The symbol length / duration may scale with 1 / SCS. Table 1: Numerology, SCS, and CP
[0068] For normal CP (14 symbols / slot) , different numerologies μ 0 to 4 allow for 1, 2, 4, 8, and 16 slots, respectively, per subframe. For extended CP, the numerology 2 allows for 4 slots per subframe. Accordingly, for normal CP and numerology μ, there are 14 symbols / slot and 2μ slots / subframe. The subcarrier spacing may be equal to 2μ*15 kHz, where μ is the numerology 0 to 4. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=4 has a subcarrier spacing of 240 kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIGs. 2A-2D provide an example of normal CP with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) (see FIG. 2B) that are frequency division multiplexed. Each BWP may have a particular numerology and CP (normal or extended) .
[0069] A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
[0070] As illustrated in FIG. 2A, some of the REs carry reference (pilot) signals (RS) for the UE.The RS may include demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and phase tracking RS (PT-RS) .
[0071] FIG. 2B illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs) , each CCE including six RE groups (REGs) , each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within one BWP may be referred to as a control resource set (CORESET) . A UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during PDCCH monitoring occasions on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at greater and / or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe / symbol timing and a physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the DM-RS. The physical broadcast channel (PBCH) , which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as SS block (SSB) ) . The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) . The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.
[0072] As illustrated in FIG. 2C, some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH) . The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. The UE may transmit sounding reference signals (SRS) . The SRS may be transmitted in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
[0073] FIG. 2D illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and hybrid automatic repeat request (HARQ) acknowledgment (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACK and / or negative ACK (NACK) ) . The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and / or UCI.
[0074] FIG. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, Internet protocol (IP) packets may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
[0075] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding / decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation / demodulation of physical channels, and MIMO antenna processing. The TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) . The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier with a respective spatial stream for transmission.
[0076] At the UE 350, each receiver 354Rx receives a signal through its respective antenna 352. Each receiver 354Rx recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) . The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.
[0077] The controller / processor 359 can be associated with at least one memory 360 that stores program codes and data. The at least one memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0078] Similar to the functionality described in connection with the DL transmission by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
[0079] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a respective spatial stream for transmission.
[0080] The UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350. Each receiver 318Rx receives a signal through its respective antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
[0081] The controller / processor 375 can be associated with at least one memory 376 that stores program codes and data. The at least one memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0082] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform aspects in connection with MAC-CE component 198 of FIG. 1.
[0083] In some wireless communication systems, there may be a UL dense deployment in order to improve coverage and capacity on the uplink. The term “UL dense” may refer to a scenario where there may be more network nodes that process UL transmissions compared to network nodes that process DL transmissions. A UE’s uplink signal / channel may be received by a UL RX point. The DL signal or channel (such as PDCCH, PDSCH, or the like) may be transmitted from a different node (e.g., a macro node, a central node, a serving cell, a serving base station, or other types of network node) . The split between the nodes may be helpful when UL coverage is a bottleneck because additional UL RX points may mitigate such issue. The UL RX point may not transmit any DL signal, and may receive UL signal and send (e.g., forward) it to a macro node, with or without additional processing at the UL RX point. In some aspects, sounding reference signal (SRS) may still be transmitted on the DL network node for a variety of purposes, such as CSI acquisition in TDD.
[0084] FIG. 4 is a diagram 400 illustrating an example of a set of UL RX points, a macro node, and a UE. As illustrated in FIG. 4, a macro node 404 may be in communication with a UE 402 for SRS transmission and DL transmission. The UL transmission from the UE 402 may be either directly received by the macro node 404, or received by the UL RX points such as a first UL RX point 406A, a second UL RX point 406B, a third UL RX point 406C, and a fourth UL RX point 406D. As an example, if the third UL RX point 406C received a UL communication 408 from the UE 402, the third UL RX point 406C may forward the UL communication 408 to the macro node 404.
[0085] Such a deployment scenario where there may be UL RX points may be referred to as asymmetric DL single transmission reception point (sTRP) UL multiple transmission reception point (mTRP) deployment. In such a scenario, a UL TCI state with a PL offset may be supported. When a UL TCI state associated with a PL offset is applied for the PUSCH / PUCCH / SRS transmission, the UE may calculate the Tx power of the PUSCH / PUCCH / SRS based on the DL PL RS and PL offset associated with this UL TCI state. A joint TCI state may be associated with a PL offset. For example, for FR1, a joint TCI state can be associated with a PL offset. When a joint TCI state associated with a PL offset is applied for the PUSCH / PUCCH / SRS transmission, the UE may calculate the Tx power of the PUSCH / PUCCH / SRS based on the DL PL RS and PL offset associated with this joint TCI state. For the association between PL offset and joint / UL TCI state, one PL offset value may be configured in a joint or UL TCI state by RRC, where different PL offset values may be configured to different joint or UL TCI states. A MAC-CE may update the PL offset value (s) for joint or UL TCI state (s) .
[0086] A particular type of MAC-CE may be used for PL offset update for asymmetric DL sTRP / UL mTRP. This particular type of MAC-CE may be identified by a particular type of electronic local context identifier (eLCID) . An absolute value of PL offset may be indicated in the MAC-CE. As an example, for the offset value, the value range is [-12, 60] dB and the step size is 4dB. In the MAC-CE, PL offset value can be updated for any configured TCI states with RRC configured PL offset, and may not be limited to the activated TCI states.
[0087] In some wireless communication systems, there may be a separate MAC-CE for PL offset update for a set of TCI states. For example, there may be multiple PL offset fields and corresponding TCI state identifiers (IDs) included in the MAC-CE. In some aspects, the serving cell identifier (ID) and bandwidth part (BWP) ID to which the PL offset is applied may be included in the MAC-CE. In some aspects, PL offset value can be updated for any configured TCI states with RRC configured PL offset, i.e., not limited to the activated TCI states. To facilitate update of PL offset value for configured TCI states that may not be activated, aspects provided herein may introduce different types of MAC-CEs where the MAC-CE may include other information, with fields arranged in particular formats, and applicable for various different cases (e.g., joint separate TCI state, a first version of unified TCI or a second version of unified TCI, and the like) .
[0088] In some aspects, the MAC-CE may have a fixed size and the number of TCI state fields and the number of PL offset fields are defined / fixed (e.g., without signaling from the network node) or configured by RRC signaling. In some aspects, as an example, M TCI state fields and M PL offset fields may be included where M is based on defined / fixed value or RRC configuration. In some aspects, the MAC-CE may have a variable size. In some aspects, the size of the MAC-CE may be indicated in the MAC sub-header.
[0089] In some aspects, TCI state fields and the PL offset fields may be mapped to the octets of the MAC-CE based on a particular order. In some aspects, the particular order may be based on TCI state fields and PL offset fields may be interlacedly (e.g., in an interlaced fashion) mapped to the octets in the MAC-CE. In some aspects, the TCI state fields and PL offset fields may be mapped to consecutive bits of the octets in the MAC-CE. In some aspects, each TCI state field and each PL offset field may be mapped to a respective octet. In some aspects, if the used bits for a field are less than one octet, the remaining bits may be reserved. In some aspects, one of the reserved bits can be used to indicate whether the PL offset corresponding to the TCI state field is updated or not. If not, the UE may skip the PL offset field corresponding to that TCI state field or the UE skip both the PL offset field and the TCI state field indicated by one of the reserved bits. In some aspects, if the TCI state fields are first mapped to the earlier octets in the MAC-CE, then the PL offset fields may be mapped to the later octets in the MAC-CE. In some aspects, if the PL offset fields are first mapped to the earlier octets in the MAC-CE, then the TCI state fields may be mapped to the later octets in the MAC-CE.
[0090] In some aspects, the i-th PL offset field may be applied to or associated with the i-th TCI state field. In some aspects, the PL offset fields and the TCI state fields may be mapped to consecutive bits of the octets in the MAC-CE. In some aspects, each TCI state field and each PL offset field may be mapped to a respective octet. In some aspects, one of the reserved bit may be used to indicate whether the PL offset corresponding to the TCI state field is updated or not. If not, the UE may skip the corresponding PL offset field and the corresponding TCI state field. In some aspects, in the MAC-CE, the serving cell ID and BWP ID may be placed before the TCI state fields and PL offset fields.
[0091] FIG. 5 is a diagram 500 illustrating a first example MAC-CE 502 where the TCI state ID fields and PL offset fields are mapped to consecutive bits of the octets in the MAC-CE and a second example MAC-CE 552 where each TCI state ID field and each PL offset field are mapped to a respective octet, where the TCI state fields and PL offset fields are interlacedly mapped to the octets in the MAC-CE. As illustrated in FIG. 5, and similarly illustrated in FIGs. 6-16, each row of a MAC-CE may represent an octet and the upmost octet may be the earliest octet in the MAC-CE. The MAC-CE 502 may be based on an implementation where the TCI state ID fields and PL offset (PLO) fields are mapped to consecutive bits of the octets in the MAC-CE, and the TCI state fields and the PL offset fields are mapped to the octets of the MAC-CE interlacedly. The MAC-CE 552 may be based on an implementation where each TCI state ID field and each PL offset field are mapped to a respective octet, and the TCI state fields and the PL offset fields are mapped to the octets of the MAC-CE interlacedly. Regarding the field TCI state IDi, if the indicated TCI state ID corresponds to a joint TCI state, 7 bits may be used; if the indicated TCI state ID corresponds to a UL TCI state, the most significant bit (MSB) may be reserved and the remaining 6 bits may be used.
[0092] FIG. 6 is a diagram 600 illustrating a first example MAC-CE 602 where the TCI state ID fields and PL offset fields are mapped to consecutive bits of the octets in the MAC-CE and a second example MAC-CE 652 where each TCI state ID field and each PL offset field are mapped to a respective octet, where TCI state fields are first mapped to the earlier octets in the MAC-CE and then the PL offset fields are mapped to the later octets in the MAC-CE. The MAC-CE 602 is based on an implementation where the TCI state ID fields and PL offset fields are mapped to consecutive bits of the octets in the MAC-CE, and the TCI state fields are first mapped to the earlier octets in the MAC-CE and then the PL offset fields are mapped to the later octets in the MAC-CE. The MAC-CE 652 is based on an implementation where each TCI state ID field and each PL offset field are mapped to a respective octet, and the TCI state fields are first mapped to the earlier octets in the MAC-CE and then the PL offset fields are mapped to the later octets in the MAC-CE.
[0093] FIG. 7 is a diagram 700 illustrating example MAC-CEs where a field Ci is used to indicate whether a PL offset corresponding a TCI state IDi is updated or not. A first example MAC-CE 702 is based on an implementation where each TCI state ID field and each PL offset field are mapped to a respective octet interlacedly and the field Ci is used to indicate whether a PL offset corresponding a TCI state IDi is updated or not. A second example MAC-CE 752 is based on an implementation where each TCI state ID field and each PL offset field are mapped to a respective octet by mapping TCI state ID field to earlier octets, and the field Ci is used to indicate whether a PL offset corresponding a TCI state IDi is updated or not.
[0094] In some aspects, where the MAC-CE may have a variable size, multiple bits in the MAC-CE may be used to indicate the presence of the TCI state fields or the presence of the PL offset fields. In some aspects, the multiple bits may include a single field indicating the number of TCI state fields or the number of PL offset fields (or both) that are present in the MAC-CE. In some aspects, each of the multiple bits may indicate the presence of a corresponding TCI state field or a corresponding PL offset field. In some aspects, the multiple bits may be mapped in the octets before the octets used for TCI state fields and PL offset fields. In some aspects, the one bit in the octet corresponding to k-th TCI state ID field may be used to indicate the presence of the next octet (s) corresponding to the (k+1) -th TCI state ID field and corresponding PL offset field.
[0095] FIG. 8 is a diagram 800 illustrating example MAC-CEs where a field indicates presence of TCI state ID fields or PL offset fields. The first MAC-CE 802 is an implementation where the multiple bits include a single field T that indicates the number of TCI state fields or the number of PL offset fields (or both) that are present in the MAC-CE. The second MAC-CE 852 is an implementation where each of the multiple bits is a field Ci that indicates the presence of a corresponding TCI state field or a corresponding PL offset field (or both) (e.g., presence of TCI state IDi and PLOi) .
[0096] FIG. 9 is a diagram 900 illustrating example MAC-CEs of variable sizes where a field Ci indicates the presence of (i+1) TCI state IDi+1 and corresponding PLOi+1. The example MAC-CE 902 and the example MAC-CE 952 includes the field Ci at different locations of respective octets.
[0097] In some aspects, for a joint DL / UL TCI state mode and a separate DL / UL TCI state mode, separate MAC-CEs with different eLCIDs may be used for a PL offset update. For example, for a joint TCI state, 7 bits may be used for each TCI state ID. For an UL TCI state, 6 bits may be used for each TCI state ID. In some aspects, a common MAC-CE with an eLCID may be used for a PL offset update. In some aspects, the TCI state fields may correspond to joint TCI state IDs or UL TCI state IDs. In some aspects, for a joint TCI state, all the bits in TCI state field may be used; for an UL TCI state, the MSB may be reserved and the remaining bits in TCI state field may be used. In some aspects, if a PL offset and TCI state ID fields are mapped to consecutive bits, separate MAC-CEs with different eLCIDs may be used for a PL offset update to save overhead for a TCI state ID field. In some aspects, if each PL offset field and TCI state ID field is mapped to a respective octet, a common MAC-CE with an eLCID may be used for a PL offset update because the overhead is not impacted by the TCI state mode.
[0098] In some aspects, where a joint DL / UL TCI state mode is configured, the BWP ID may correspond to the DL BWP ID. In some aspects, where a separate DL / UL TCI state mode is configured, the BWP ID may correspond to the UL BWP ID.
[0099] In some aspects, two groups of PL offset fields may be included in the MAC-CE. The first group of PL offset fields may be applied for activated TCI states, and the second group of PL offset fields may be applied for configured TCI states with an RRC configured PL offset but not activated. In some aspects, for each PL offset in the first group, the corresponding TCI state ID may not be included in the MAC-CE, while for each PL offset in the second group, the corresponding TCI state ID may be included in the MAC-CE.
[0100] In some aspects, each PL offset in the first group may be applied / mapped to an active joint / UL TCI state of the active joint / UL TCI state (s) corresponding to a TCI codepoint. In some aspects, the mapping between a PL offset and a joint / UL TCI state corresponding to a TCI codepoint may be determined by the ordinal position of the PL offset fields among all the PL offset fields. For example, the PL offsets may be mapped to the joint / UL TCI state based on an ascending order of a TCI codepoint. If a TCI codepoint is associated with two joint / UL TCI states, the PL offset may be first mapped to the first joint / UL TCI state corresponding to that TCI codepoint and then mapped to the second joint / UL TCI state corresponding to that TCI codepoint.
[0101] In some aspects, for the first group of PL offsets, whether the PL offset corresponding to an active joint / UL TCI state is present or not may be determined based on whether the joint / UL TCI state is activated or not for the corresponding TCI codepoint. In some aspects, if the joint / UL TCI state is activated for the corresponding TCI codepoint, the PL offset corresponding to that joint / UL TCI state is present; otherwise, the PL offset may not be present. In some aspects, for the first group of PL offsets, whether the PL offset corresponding to an active joint / UL TCI state is present or not may be further based on whether the joint / UL TCI state is configured with PL offset or not. In some aspects, if the joint / UL TCI state is activated for the corresponding TCI codepoint, and the joint / UL TCI state is configured with PL offset, the PL offset corresponding to that joint / UL TCI state may be present. Otherwise, the PL offset corresponding to that joint / UL TCI state may not be present.
[0102] FIG. 10 is a diagram 1000 illustrating example MAC-CEs. As illustrated in FIG. 10, a first example MAC-CE 1002 may include DL BWP ID and UL BWP ID in separate octets. A second example MAC-CE 1052 may include PLOi that indicates the PL offset associated with the UL TCI state mapped to i-th TCI codepoint when the UL TCI state is activated, regardless of whether the TCI state is configured with a PLO or not. A third example MAC-CE 1072 may include PLOi that indicates the PL offset associated with the UL TCI state mapped to i-th TCI codepoint when the UL TCI state is configured with a PLO. Table 2 below shows example TCI code points: · denote the UL TCI state of corresponding TCI codepoint is configured with PL offset · denote the UL TCI state of the corresponding TCI codepoint is not configured with PL offset Table 2: example TCI code points.
[0103] In some aspects, for the first group of PL offsets, whether the PL offset corresponding to an active joint / UL TCI state is present or not may be explicitly indicated in the MAC-CE. In some aspects, for each PL offset in the first group, a corresponding field in the MAC-CE may be used to indicate whether the PL offset is present or not. In some aspects, the value of each field may be dependent on the unified TCI state activation MAC-CE or independent of the unified TCI state activation MAC-CE. In some aspects, if it is dependent on the unified TCI state activation MAC-CE, the field may indicate the PL offset is present when the corresponding joint / UL TCI state is activated, or when the corresponding joint / UL TCI state is activated and configured with a PL offset (e.g., and not otherwise present) . In some aspects, the field (s) that are used to indicate the presence of the PL offsets are placed before the octets corresponding to the PL offsets. In some aspects, an explicit indication may have more flexibility where even if a joint / UL TCI state is activated, the PL offset corresponding to that joint / UL TCI state may not be present. For example, if the network has not obtained the PL offset for a joint / UL TCI state that has been activated, the network may not indicate the PL offset for that joint / UL TCI state.
[0104] In some aspects, for the second group of PL offsets, the number of PL offsets in the second group may be fixed or configured by RRC signaling, or variable.
[0105] In some aspects, for PL offsets and TCI state ID fields corresponding to the second group, the mapping may be based on a particular order as described herein. For PL offsets and TCI state ID fields corresponding to the second group, the mapping may be based on other mapping orders (e.g., earlier or later) as described herein. In some aspects, for the second group, the particular order may be based on TCI state fields and PL offset fields may be interlacedly (e.g., in an interlaced fashion) mapped to the octets in the MAC-CE. In some aspects, for the second group, the TCI state fields and PL offset fields may be mapped to consecutive bits of the octets in the MAC-CE. In some aspects, for the second group, each TCI state field and each PL offset field may be mapped to a respective octet. In some aspects, for the second group, if the used bits for a field are less than one octet, the remaining bits may be reserved. In some aspects, for the second group, one of the reserved bits can be used to indicate whether the PL offset corresponding to the TCI state field is updated or not. If not, the UE may skip the PL offset field corresponding to that TCI state field. In some aspects, the TCI state fields may be first mapped to the earlier octets in the MAC-CE, then the PL offset fields may be mapped to the later octets in the MAC-CE. In some aspects, for the second group, the PL offset fields may be first mapped to the earlier octets in the MAC-CE, then the TCI state fields may be mapped to the later octets in the MAC-CE.In some aspects, for the second group, the i-th PL offset field may be applied to or associated with the i-th TCI state field. In some aspects, the PL offset fields and the TCI state fields may be mapped to consecutive bits of the octets in the MAC-CE. In some aspects, for the second group, each TCI state field and each PL offset field may be mapped to a respective octet. In some aspects, for the second group, one of the reserved bits may be used to indicate whether the PL offset corresponding to the TCI state field is updated or not.
[0106] In some aspects, for the second group of PL offsets, the number of PL offsets that are present in the second group may be derived based on the size of the MAC-CE, the size of the first group of PL offsets fields, and the size of the serving cell ID / BWP ID field. In some aspects, the number of PL offsets that are present in the second group may be indicated in the MAC-CE. In some aspects, the number of PL offsets that are present in the second group may be indicated by a single field. In some aspects, for each PL offset in the second group, a corresponding field may be used to indicate whether the corresponding PL offset is present or not. In some aspects, separate octet (s) may be used and the octet (s) that include the fields indicating whether the corresponding PL offset is present may be placed before the octets used for TCI state fields and PL offset fields. In some aspects, the one bit in the octet corresponding to k-th TCI state ID field may be used to indicate the presence of the next octet (s) corresponding to the (k+1) -th TCI state ID field and corresponding PL offset field.
[0107] In some aspects, the serving cell ID and BWP ID fields may be placed before all other fields in the MAC-CE. In some aspects, all fields related to the first group of PL offsets may be placed before or after all fields related to the second group of PL offsets. In some aspects, the fields that are used to indicate the presence of the PL offsets may be placed before PL offsets or TCI state ID fields. In some aspects, among the PL offset fields for the first group, and the PL offset and TCI state ID fields for the second group, the fields related to the first group may be placed before or after the fields related to the second group.
[0108] In some aspects, for a joint DL / UL TCI state mode and separate DL / UL TCI state mode, a common MAC-CE with an eLCID may be used for both joint DL / UL TCI state modes and separate DL / UL TCI state modes. In some aspects, the TCI state fields may correspond to joint TCI state IDs or UL TCI state IDs. In some aspects, for joint TCI states, all the bits in TCI state ID field may be used. For an UL TCI state, the MSB in TCI state ID field may be reserved, and remaining bits in TCI state ID field may be used.
[0109] In some aspects, for joint DL / UL TCI state modes and separate DL / UL TCI state modes, separate MAC-CEs with different eLCIDs may be used for joint DL / UL TCI state modes and separate DL / UL TCI state modes. For example, for joint TCI states, 7 bits may be used for each TCI state ID; for UL TCI states, 6 bits may be used for each TCI state ID.
[0110] In some aspects, a common MAC-CE may be used for both a first version of unified TCIs and a second version of unified TCIs, where the second version may be later than the first version. In some aspects, the second version may support dynamic beamforming and the first version may not support dynamic beamforming. In some aspects, the second version may support TCI states for specific beam measurements and the first version may not support TCI states for specific beam measurements. In some aspects, if the field (s) that are used to indicate the presence of the PL offsets in the first group are included in the MAC-CE, the number of field (s) may be determined based on the maximum number of joint / UL TCI states that may be activated in a second version of unified TCI. In some aspects, for the second version of unified TCI, all fields may be used and the field Pi, j may indicate whether the PL offset associated with the j-th joint / UL TCI state mapped to i-th TCI codepoint of the TCI field in DCI is present or not. In some aspects, for the first version of unified TCI, a subset of the fields that are used to indicate the presence of the PL offsets in the first group may be used, and remaining fields may be reserved. For example, the fields that are used to indicate the presence of the PL offsets corresponding to the first joint / UL TCI state associated with each TCI codepoint (e.g., Pi, 1) may be used, or the first half of fields (in earlier octet) may be used and the second half of fields (in later octet) may be reserved.
[0111] FIG. 11 is a diagram 1100 illustrating an example MAC-CE with two groups of PL offsets and supports both the first version of TCI state and the second version of a TCI state. In FIG. 11, Pi, j is a field where if the first version of unified TCI is configured, Pi,1 indicates whether the PL offset associated with a joint / UL TCI state mapped to the i-th TCI codepoint of the TCI field in DCI is present or not; Pi, 2 is reserved. If the second version of unified TCI is configured, Pi, j indicates whether the PL offset associated with the j-th joint / UL TCI state mapped to i-th TCI codepoint of the TCI field in DCI is present or not.
[0112] FIG. 12 is a diagram 1200 illustrating another example MAC-CE with two groups of PL offsets and supports both the first version of a TCI state and the second version of a TCI state. Compared to the example in FIG. 11, the example in FIG. 12 indicates the value of M, i.e., number of TCI state IDs or number of PLO fields (or both) that are present in the MAC-CE, in a different octet. The first group of fields and the second group of fields are also distributed differently (e.g., the first group of fields being in non-consecutive octets) .
[0113] In some aspects, separate MAC-CEs with different eLCIDs are used for the first version of a unified TCI and the second version of a unified TCI. In some aspects, if the field (s) that are used to indicate the presence of the PL offsets in the first group are included in the MAC-CE, the number of field (s) in the MAC-CE corresponding to the first version of unified TCI and the second version of unified TCI are determined based on the maximum number of joint / UL TCI states that can be activated in the first version of a unified TCI and the second version of a unified TCI, respectively. In some aspects, for the first version of a unified TCI, the field Pi indicates whether the PL offset associated with the joint / UL TCI state mapped to i-th TCI codepoint of the TCI field in DCI is present or not. In some aspects, for the second version of unified TCI, the field Pi, j indicates whether the PL offset associated with the j-th joint / UL TCI state mapped to i-th TCI codepoint of the TCI field in DCI is present or not.
[0114] FIG. 13 is a diagram 1300 illustrating example separate MAC-CEs with two groups of PL offsets. As illustrated in FIG. 13, separate MAC-CEs, a first MAC-CE 1302 and a second MAC-CE 1304, with different eLCIDs are used. The first MAC-CE 1302 and the second MAC-CE 1304 may respectively indicate PL offsets associated with TCI state fields for the first version and the second version of the unified TCI state. The field Pi indicates whether the PL offset associated with the joint / UL TCI state mapped to i-th TCI codepoint of the TCI field in DCI is present or not.
[0115] FIG. 14 is a diagram 1400 illustrating example MAC-CEs with two groups of PL offsets and supports the second version of a TCI state. As illustrated in FIG. 14, separate MAC-CEs, a first MAC-CE 1402 and a second MAC-CE 1404, with different eLCIDs are used. The first MAC-CE 1402 and the second MAC-CE 1404 may respectively indicate PL offsets associated with TCI state fields for the first version and the second version of TCI state. The field Pi, j indicates whether the PL offset associated with the j-the joint / UL TCI state mapped to i-th TCI codepoint of the TCI field in DCI is present or not.
[0116] In some aspects, a bitmap may be used to indicate whether a PL offset for each of the configured TCI states with RRC configured PL offsets is present or not. In some aspects, each bit (e.g., Ti) in the bitmap is used to indicate whether the PL offset corresponding to a given TCI state is present or not. For example, if the bit field is set to 0, the PL offset corresponding to the given TCI state is not present. In some aspects, if the bit field is set to 1, the PL offset corresponding to the given TCI state is present. In some aspects, the PL offset fields are in the order of indication of Ti fields. In some aspects, the PL offset fields are mapped to consecutive bits in the octet (s) in the MAC-CE. In some aspects, each PL offset field is mapped to multiple bits of a respective octet in the MAC-CE. In some aspects, the mapping between PL offset and a joint / UL TCI state may be determined by the ordinal position of the PL offset fields among all the PL offset fields. In some aspects, there is no TCI state ID field in the MAC-CE.
[0117] In some aspects, a common MAC-CE with an eLCID may be used for both joint DL / UL TCI state modes and separate DL / UL TCI state modes. In some aspects, the length of the bitmap may be fixed (such as 128 bits) , where for a joint TCI state mode, all 128 bits are used and for a separate TCI state mode, 64 bits (the first 64 bits or the last 64 bits) among the 128 bits are used. In some aspects, the length of the bitmap is based on the maximum number between the number of configured joint TCI states and number of configured UL TCI states. In some aspects, for the joint or UL TCI states that are configured with a lesser number, a subset of the bitmap is used. In some aspects, the length of the bitmap may be based on the maximum number between the number of configured joint TCI states with an RRC configured PL offset and the number of configured UL TCI states with an RRC configured PL offset. In some aspects, for the joint or UL TCI states with an RRC configured PL offset that are configured with a lesser number, a subset of the bitmap is used.
[0118] In some aspects, separate MAC-CEs with different eLCIDs are used for a joint DL / UL TCI state mode and a separate DL / UL TCI state mode. For the joint TCI state mode, the length of the bitmap may be based on: (1) fixed (e.g., 128 bits) , (2) the number of configured joint TCI states, or (3) the number of configured joint TCI states with RRC configured PL offsets. In some aspects, for the separate TCI state mode, the length of the bitmap may be based on: (1) fixed (e.g., 128 bits) , (2) the number of configured joint TCI states, or (3) the number of configured joint TCI states with RRC configured PL offsets.
[0119] FIG. 15 is a diagram 1500 illustrating an example MAC-CE 1502. In some aspects, the field Ti indicates whether PL offset field corresponding TCI state ID i or TCI UL state ID i is present or not. In some aspects, the field Ti indicates whether PL offset field corresponding to i-th configured joint / UL TCI state is present or not. In some aspects, the field Ti indicates whether a PL offset field corresponding to i-th configured joint / UL TCI state with an RRC configured PL offset is present or not. The field PLOi may indicate: (1) PL offset corresponding to TCI state ID i or TCI UL state ID i, (2) PL offset corresponding to i-th configured joint / UL TCI state, or (3) PL offset corresponding to i-th configured joint / UL TCI state with an RRC configured PL offset.
[0120] In some aspects, one bit in the MAC-CE may be used to indicate whether a common PL offset is applied / updated to all configured joint / UL TCI states with RRC configured PL offset or separate PL offsets are applied / updated for different join / UL TCI states. In some aspects, if the bit field is set to 1, a common PL offset field may be applied / updated to all configured joint / UL TCI states with an RRC configured PL offset. In some aspects, one PL offset field may be present and other PL offset fields and TCI state ID fields may not be present. In some aspects, if the bit field is set to 0, separate PL offsets may be applied / updated for different joint / UL TCI states.
[0121] FIG. 16 is a diagram 1600 illustrating an example MAC-CE with one bit to indicate whether a common offset is applied / updated to all configured joint / UL TCI states. In the example illustrated in FIG. 16, if the field C is set to 1, PLO1 is present, other PLO fields and TCI state ID fields are not present. In such a scenario, the PL offset indicated by PLO1 is applied to all joint / UL TCI states with an RRC configured PL offset. If C is set to 0, all PLO fields and TCI state ID fields are present. In such a scenario, the PL offset indicated by PLOi field is applied to a joint / UL TCI state indicated by the TCI state IDi field.
[0122] FIG. 17 is a diagram 1700 illustrating example communications between a network node 1704 and a UE 1702. The network node 1704 may transmit at least one MAC-CE 1712 based on the MAC-CEs described in connection with any of FIGs. 5-16. For example, the UE 1702 may receive, from the network node 1704, a MAC-CE with a fixed size or a variable size indicating a first quantity of a set of TCI state fields and a second quantity of a set of PL offset fields based on an order, where the variable size is based on the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields (or both) . In some aspects, the UE 1702 may receive, from the network node 1704, a MAC-CE including a first set of PL offset fields associated with a first set of TCI state identifiers (IDs) of activated TCI states and a second set of PL offset fields associated with a second set of TCI state IDs of non-activated TCI states, where the MAC-CE includes the second set of TCI state IDs without the first set of TCI state IDs. In some aspects, the UE 1702 may receive, from the network node 1704, a MAC-CE including a first set of PL offset fields associated with a first set of TCI states and a bitmap that indicates a presence of the first set of PL offset fields and an absence of a second set of PL offset fields associated with a second set of TCI states. In some aspects, after receiving the MAC-CE the UE may communicate with the network 1704 accordingly, such as transmitting UL communications or receive DL communications based on the configured TCI state and the associated with PL offset.
[0123] FIG. 18 is a flowchart 1800 of a method of wireless communication. The method may be performed by a UE (e.g., the UE 104, the UE 1702; the apparatus 2104) .
[0124] At 1802, the UE may receive, from a network entity (e.g., the network node 1704) , a MAC-CE with a fixed size or a variable size indicating a first quantity of a set of TCI state fields and a second quantity of a set of PL offset fields based on an order, where the variable size is based on the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields. For example, the UE 1702 may receive, from a network entity, a MAC-CE with a fixed size or a variable size indicating a first quantity of a set of TCI state fields and a second quantity of a set of PL offset fields based on an order, where the variable size is based on the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields. In some aspects, 1802 may be performed by MAC-CE component 198. In some aspects, the MAC-CE has the fixed size, and where the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields is configured via the RRC signaling or configured without signaling. In some aspects, the set of TCI state fields and the set of PL offset fields are mapped to consecutive bits of a set of octets or respective different octets in the MAC-CE based on an interlaced pattern. In some aspects, the set of TCI state fields are mapped to a first set of octets in the MAC-CE and the set of PL offset fields are mapped to a second set of octets in the MAC-CE, where the first set of octets is earlier in a time domain than the second set of octets. In some aspects, the MAC-CE further includes a serving cell identifier (ID) and a bandwidth part (BWP) ID before the set of TCI state fields and the set of PL offset fields. In some aspects, the MAC-CE has the variable size and further includes a sub-header that indicates the variable size, or where a set of bits in the MAC-CE indicates a presence of the set of PL offset fields or the set of TCI state fields. In some aspects, the set of bits indicates the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields. In some aspects, each bit of the set of bits is mapped to a corresponding TCI state in the set of TCI state fields or a corresponding PL offset field of the set of PL offset fields, and where the set of bits is mapped to a set of octets before the corresponding PL offset field or the corresponding TCI state field. In some aspects, each bit of the set of bits is mapped to a corresponding TCI state in the set of TCI state fields or a corresponding PL offset field of the set of PL offset fields, and where each bit of the set of bits is mapped to an octet of a set of octets to indicate the corresponding PL offset field or the corresponding TCI state field in a next octet. In some aspects, one bit in the MAC-CE indicates whether a common PL offset is applied to a set of configured joint or uplink TCI states, and wherein each of the set of configured joint or uplink TCI states is configured with a PL offset.
[0125] At 1804, the UE may communicate with the network entity based on the MAC-CE. For example, the UE 1702 may communicate (e.g., at 1714) with the network entity based on the MAC-CE. In some aspects, 1804 may be performed by MAC-CE component 198.
[0126] FIG. 19 is a flowchart 1900 of a method of wireless communication. The method may be performed by a UE (e.g., the UE 104, the UE 1702; the apparatus 2104) .
[0127] At 1902, the UE may receive, from a network entity, a MAC-CE including a first set of PL offset fields associated with a first set of TCI state identifiers (IDs) of activated TCI states and a second set of PL offset fields associated with a second set of TCI state IDs of non-activated TCI states, where the MAC-CE includes the second set of TCI state IDs without the first set of TCI state IDs. For example, the UE 1702 may receive, from a network entity (e.g., the network node 1704) , a MAC-CE (e.g., 1712) including a first set of PL offset fields associated with a first set of TCI state identifiers (IDs) of activated TCI states and a second set of PL offset fields associated with a second set of TCI state IDs of non-activated TCI states, where the MAC-CE includes the second set of TCI state IDs without the first set of TCI state IDs. In some aspects, 1902 may be performed by MAC-CE component 198. In some aspects, the MAC-CE may instead include the first set of TCI state IDs without the second set of TCI state IDs. In some aspects, each PL offset field in the first set of PL offset fields is mapped to a joint or uplink TCI state corresponding to a TCI codepoint and associated with the first set of TCI state IDs based on an ordinal position within the first set of PL offset fields. In some aspects, each PL offset field in the first set of PL offset fields corresponds to an active joint or uplink TCI state corresponding to a TCI codepoint. In some aspects, each PL offset field in the first set of PL offset fields corresponding to an active joint or uplink TCI state is present based on the active joint or uplink TCI state being configured with a PL offset, or wherein each PL offset field in the first set of PL offset fields corresponding to the active joint or uplink TCI state is not present based on the active joint or uplink TCI state not being configured with the PL offset. In some aspects, the MAC-CE includes a set of bits to indicate a presence of each PL offset field in the first set of PL offset fields. In some aspects, a quantity of the second set of PL offset fields is fixed or configured via RRC signaling or the quantity of the second set of PL offset fields is variable. In some aspects, the MAC-CE further includes a serving cell identifier (ID) and a bandwidth part (BWP) ID at a beginning of the MAC-CE before other fields of the MAC-CE.
[0128] At 1904, the UE may communicate with the network entity based on the MAC-CE. For example, the UE 1702 may communicate (e.g., at 1714) with the network entity based on the MAC-CE. In some aspects, 1904 may be performed by MAC-CE component 198.
[0129] FIG. 20 is a flowchart 2000 of a method of wireless communication. The method may be performed by a UE (e.g., the UE 104, the UE 1702; the apparatus 2104) .
[0130] At 2002, the UE may receive, from a network entity, a MAC-CE including a first set of PL offset fields associated with a first set of TCI states and a bitmap that indicates a presence of the first set of PL offset fields and an absence of a second set of PL offset fields associated with a second set of TCI states. For example, the UE 1702 may receive, from a network entity (e.g., the network node 1704) , a MAC-CE (e.g., 1712) including a first set of PL offset fields associated with a first set of TCI states and a bitmap that indicates a presence of the first set of PL offset fields and an absence of a second set of PL offset fields associated with a second set of TCI states. In some aspects, 2002 may be performed by MAC-CE component 198. In some aspects, each bit field in the bitmap that has a value of one corresponds to a respective PL offset field in the first set of PL offset fields that is present, and where each bit field in the bitmap that has a value of zero corresponds to a respective PL offset field in the second set of PL offset fields that is absent. In some aspects, each of the bitmap is mapped to a given TCI state ID based at least in part on the index of the bit in the bitmap and wherein the first set of TCI states are mapped to the first set of PL offset fields based on a respective ordinal position of a corresponding PL offset field, and where a first set of TCI state identifiers (IDs) associated with the first set of TCI states and a second set of TCI state IDs is absent from the MAC-CE.
[0131] At 2004, the UE may communicate with the network entity based on the MAC-CE. For example, the UE 1702 may communicate (e.g., at 1714) with the network entity based on the MAC-CE. In some aspects, 2004 may be performed by MAC-CE component 198.
[0132] FIG. 21 is a diagram 2100 illustrating an example of a hardware implementation for an apparatus 2104. The apparatus 2104 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus2104 may include at least one cellular baseband processor 2124 (also referred to as a modem) coupled to one or more transceivers 2122 (e.g., cellular RF transceiver) . The cellular baseband processor (s) 2124 may include at least one on-chip memory 2124'. In some aspects, the apparatus 2104 may further include one or more subscriber identity modules (SIM) cards 2120 and at least one application processor 2106 coupled to a secure digital (SD) card 2108 and a screen 2110. The application processor (s) 2106 may include on-chip memory 2106'. In some aspects, the apparatus 2104 may further include a Bluetooth module 2112, a WLAN module 2114, an SPS module 2116 (e.g., GNSS module) , one or more sensor modules 2118 (e.g., barometric pressure sensor / altimeter; motion sensor such as inertial measurement unit (IMU) , gyroscope, and / or accelerometer (s) ; light detection and ranging (LIDAR) , radio assisted detection and ranging (RADAR) , sound navigation and ranging (SONAR) , magnetometer, audio and / or other technologies used for positioning) , additional memory modules 2126, a power supply 2130, and / or a camera 2132. The Bluetooth module 2112, the WLAN module 2114, and the SPS module 2116 may include an on-chip transceiver (TRX) (or in some cases, just a receiver (RX) ) . The Bluetooth module 2112, the WLAN module 2114, and the SPS module 2116 may include their own dedicated antennas and / or utilize the antennas 2180 for communication. The cellular baseband processor (s) 2124 communicates through the transceiver (s) 2122 via one or more antennas 2180 with the UE 104 and / or with an RU associated with a network entity 2102. The cellular baseband processor (s) 2124 and the application processor (s) 2106 may each include a computer-readable medium / memory 2124', 2106', respectively. The additional memory modules 2126 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory 2124', 2106', 2126 may be non-transitory. The cellular baseband processor (s) 2124 and the application processor (s) 2106 are each responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor (s) 2124 / application processor (s) 2106, causes the cellular baseband processor (s) 2124 / application processor (s) 2106 to perform the various functions described supra. The computer-readable medium / memory may also be used for storing data that is manipulated by the cellular baseband processor (s) 2124 / application processor (s) 2106 when executing software. The cellular baseband processor (s) 2124 / application processor (s) 2106 may be a component of the UE 350 and may include the at least one memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the apparatus 2104 may be at least one processor chip (modem and / or application) and include just the cellular baseband processor (s) 2124 and / or the application processor (s) 2106, and in another configuration, the apparatus 2104 may be the entire UE (e.g., see UE 350 of FIG. 3) and include the additional modules of the apparatus 2104.
[0133] As discussed supra, the MAC-CE component 198 may be configured to receive, from a network entity, a medium access control (MAC) control element (MAC-CE) with a fixed size or a variable size indicating a first quantity of a set of transmission configuration indicator (TCI) state fields and a second quantity of a set of pathloss (PL) offset fields based on an order, where the variable size is based on the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields or where the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields is configured via radio resource control (RRC) signaling. In some aspects, the MAC-CE component 198 may be further configured to communicate with the network entity based on the MAC-CE. The MAC-CE component 198 may be within the cellular baseband processor (s) 2124, the application processor (s) 2106, or both the cellular baseband processor (s) 2124 and the application processor (s) 2106. The component 198 may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by one or more processors configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by one or more processors, or some combination thereof. When multiple processors are implemented, the multiple processors may perform the stated processes / algorithm individually or in combination. As shown, the apparatus 2104 may include a variety of components configured for various functions. In one configuration, the apparatus 2104, and in particular the cellular baseband processor (s) 2124 and / or the application processor (s) 2106, may include means for receiving, from a network entity, a MAC-CE with a fixed size or a variable size indicating a first quantity of a set of TCI state fields and a second quantity of a set of PL offset fields based on an order, where the variable size is based on the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields. In some aspects, the apparatus 2104 may include means for communicating with the network entity based on the MAC-CE. In some aspects, the apparatus 2104 may include means for receiving, from a network entity, a MAC-CE including a first set of PL offset fields associated with a first set of TCI state identifiers (IDs) of activated TCI states and a second set of PL offset fields associated with a second set of TCI state IDs of non-activated TCI states, where the MAC-CE includes the first set of TCI state IDs without the second set of TCI state IDs. In some aspects, the apparatus 2104 may include means for communicating with the network entity based on the MAC-CE. In some aspects, the apparatus 2104 may include means for receiving, from a network entity, a MAC-CE including a first set of PL offset fields associated with a first set of TCI states and a bitmap that indicates a presence of the first set of PL offset fields and an absence of a second set of PL offset fields associated with a second set of TCI states. In some aspects, the apparatus 2104 may include means for communicating with the network entity based on the MAC-CE. The means may be the component 198 of the apparatus 2104 configured to perform the functions recited by the means. As described supra, the apparatus 2104 may include the TX processor 368, the RX processor 356, and the controller / processor 359. As such, in one configuration, the means may be the TX processor 368, the RX processor 356, and / or the controller / processor 359 configured to perform the functions recited by the means.
[0134] It is understood that the specific order or hierarchy of blocks in the processes / flowcharts disclosed is an illustration of example approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes / flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not limited to the specific order or hierarchy presented.
[0135] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not limited to the aspects described herein, but are to be accorded the full scope consistent with the language claims. Reference to an element in the singular does not mean “one and only one” unless specifically so stated, but rather “one or more. ” Terms such as “if, ” “when, ” and “while” do not imply an immediate temporal relationship or reaction. That is, these phrases, e.g., “when, ” do not imply an immediate action in response to or during the occurrence of an action, but simply imply that if a condition is met then an action will occur, but without requiring a specific or immediate time constraint for the action to occur. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. Sets should be interpreted as a set of elements where the elements number one or more. Accordingly, for a set of X, X would include one or more elements. When at least one processor (i.e., a set of one or more processors P) is configured to perform a set of functions F, each processor of P may be configured to perform a subset S of F, where Accordingly, each processor of the at least one processor may be configured to perform a particular subset of the set of functions, where the subset is the full set, a proper subset of the set, or an empty subset of the set. A processor may be referred to as processor circuitry. A memory / memory module may be referred to as memory circuitry. If a first apparatus receives data from or transmits data to a second apparatus, the data may be received / transmitted directly between the first and second apparatuses, or indirectly between the first and second apparatuses through a set of apparatuses. A device configured to “output” data or “provide” data, such as a transmission, signal, or message, may transmit the data, for example with a transceiver, or may send the data to a device that transmits the data. A device configured to “obtain” data, such as a transmission, signal, or message, may receive, for example with a transceiver, or may obtain the data from a device that receives the data. Information stored in a memory includes instructions and / or data. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are encompassed by the claims. Moreover, nothing disclosed herein is dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module, ” “mechanism, ” “element, ” “device, ” and the like may not be a substitute for the word “means. ” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”
[0136] As used herein, the phrase “based on” shall not be construed as a reference to a closed set of information, one or more conditions, one or more factors, or the like. In other words, the phrase “based on A” (where “A” may be information, a condition, a factor, or the like) shall be construed as “based at least on A” unless specifically recited differently.
[0137] The following aspects are illustrative only and may be combined with other aspects or teachings described herein, without limitation.
[0138] Aspect 1 is an apparatus for wireless communication at a user equipment (UE) , including: at least one memory; and at least one processor coupled to the at least one memory, and based at least in part on information stored in the at least one memory, the at least one processor is configured to: receive, from a network entity, a medium access control (MAC) control element (MAC-CE) with a fixed size or a variable size indicating a first quantity of a set of transmission configuration indicator (TCI) state fields and a second quantity of a set of pathloss (PL) offset fields based on an order, where the variable size is based on the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields; and communicate with the network entity based on the MAC-CE.
[0139] Aspect 2 is the apparatus of aspect 1, where the MAC-CE has the fixed size, and where the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields is configured via the RRC signaling or configured without signaling.
[0140] Aspect 3 is the apparatus of any of aspects 1-2, where the set of TCI state fields and the set of PL offset fields are mapped to consecutive bits of a set of octets or respective different octets in the MAC-CE based on an interlaced pattern.
[0141] Aspect 4 is the apparatus of any of aspects 1-3, where the set of TCI state fields are mapped to a first set of octets in the MAC-CE and the set of PL offset fields are mapped to a second set of octets in the MAC-CE, where the first set of octets is earlier in a time domain than the second set of octets.
[0142] Aspect 5 is the apparatus of any of aspects 1-4, where the MAC-CE further includes a serving cell identifier (ID) and a bandwidth part (BWP) ID before the set of TCI state fields and the set of PL offset fields.
[0143] Aspect 6 is the apparatus of any of aspects 1-5, where the MAC-CE has the variable size and further includes a sub-header that indicates the variable size, or a set of bits in the MAC-CE indicates a presence of the set of PL offset fields or the set of TCI state fields.
[0144] Aspect 7 is the apparatus of aspect 6, where the set of bits indicates the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields.
[0145] Aspect 8 is the apparatus of any of aspects 6-7, where each bit of the set of bits is mapped to a corresponding TCI state in the set of TCI state fields or a corresponding PL offset field of the set of PL offset fields, and where the set of bits is mapped to a set of octets before the corresponding PL offset field or the corresponding TCI state field.
[0146] Aspect 9 is the apparatus of any of aspects 6-8, where each bit of the set of bits is mapped to a corresponding TCI state in the set of TCI state fields or a corresponding PL offset field of the set of PL offset fields, and where each bit of the set of bits is mapped to an octet of a set of octets to indicate the corresponding PL offset field or the corresponding TCI state field in a next octet.
[0147] Aspect 10 is the apparatus of any of aspects 1, where one bit in the MAC-CE indicates whether a common PL offset is applied to a set of configured joint or uplink TCI states, and where each of the set of configured joint or uplink TCI states is configured with a PL offset.
[0148] Aspect 11 is an apparatus for wireless communication at a user equipment (UE) , including: at least one memory; and at least one processor coupled to the at least one memory, and based at least in part on information stored in the at least one memory, the at least one processor is configured to: receive, from a network entity, a medium access control (MAC) control element (MAC-CE) including a first set of pathloss (PL) offset fields associated with a first set of transmission configuration indicator (TCI) state identifiers (IDs) of activated TCI states and a second set of PL offset fields associated with a second set of TCI state IDs of non-activated TCI states, where the MAC-CE includes the second set of TCI state IDs without the first set of TCI state IDs; and communicate with the network entity based on the MAC-CE.
[0149] Aspect 12 is the apparatus of any of aspects 1-11, where each PL offset field in the first set of PL offset fields is mapped to a joint or uplink TCI state corresponding to a TCI codepoint and associated with the first set of TCI state IDs based on an ordinal position within the first set of PL offset fields.
[0150] Aspect 13 is the apparatus of any of aspects 1-11, where each PL offset field in the first set of PL offset fields corresponds to an active joint or uplink TCI state corresponding to a TCI codepoint.
[0151] Aspect 14 is the apparatus of any of aspects 1-11, where each PL offset field in the first set of PL offset fields corresponding to an active joint or uplink TCI state is present based on the active joint or uplink TCI state being configured with a PL offset, or where each PL offset field in the first set of PL offset fields corresponding to the active joint or uplink TCI state is not present based on the active joint or uplink TCI state not being configured with the PL offset.
[0152] Aspect 15 is the apparatus of any of aspects 1-11, where the MAC-CE includes a set of bits to indicate a presence of each PL offset field in the first set of PL offset fields.
[0153] Aspect 16 is the apparatus of any of aspects 1-15, where a quantity of the second set of PL offset fields is fixed or configured via radio resource control (RRC) signaling or the quantity of the second set of PL offset fields is variable.
[0154] Aspect 17 is the apparatus of any of aspects 1-16, where the MAC-CE further includes a serving cell identifier (ID) and a bandwidth part (BWP) ID at a beginning of the MAC-CE before other fields of the MAC-CE.
[0155] Aspect 18 is an apparatus for wireless communication at a user equipment (UE) , including: at least one memory; and at least one processor coupled to the at least one memory, and based at least in part on information stored in the at least one memory, the at least one processor is configured to: receive, from a network entity, a medium access control (MAC) control element (MAC-CE) including a first set of pathloss (PL) offset fields associated with a first set of transmission configuration indicator (TCI) states and a bitmap that indicates a presence of the first set of PL offset fields and an absence of a second set of PL offset fields associated with a second set of TCI states; and communicate with the network entity based on the MAC-CE.
[0156] Aspect 19 is the apparatus of any of aspects 1-18, where each bit field in the bitmap that has a value of one corresponds to a respective PL offset field in the first set of PL offset fields that is present, and where each bit field in the bitmap that has a value of zero corresponds to a respective PL offset field in the second set of PL offset fields that is absent.
[0157] Aspect 20 is the apparatus of any of aspects 1-18, where each of the bitmap is mapped to a given TCI state ID based at least in part on an index of a bit in the bitmap and where the first set of TCI states are mapped to the first set of PL offset fields based on a respective ordinal position of a corresponding PL offset field, and where a first set of TCI state identifiers (IDs) associated with the first set of TCI states and a second set of TCI state IDs is absent from the MAC-CE.
[0158] Aspect 21 is a method of wireless communication for implementing any of aspects 1 to 20.
[0159] Aspect 22 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer executable code, the code when executed by at least one processor causes the at least one processor to implement any of aspects 1 to 20.
[0160] Aspect 23 is an apparatus comprising means for implementing any of aspects 1 to 20.
Claims
1.An apparatus for wireless communication at a user equipment (UE) , comprising:at least one memory; andat least one processor coupled to the at least one memory, and based at least in part on information stored in the at least one memory, the at least one processor is configured to:receive, from a network entity, a medium access control (MAC) control element (MAC-CE) with a fixed size or a variable size indicating a first quantity of a set of transmission configuration indicator (TCI) state fields and a second quantity of a set of pathloss (PL) offset fields based on an order, wherein the variable size is based on the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields; andcommunicate with the network entity based on the MAC-CE.2.The apparatus of claim 1, wherein the MAC-CE has the fixed size, and wherein the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields is configured via a radio resource control (RRC) signaling or configured without signaling.3.The apparatus of claim 1, wherein the set of TCI state fields and the set of PL offset fields are mapped to consecutive bits of a set of octets or respective different octets in the MAC-CE based on an interlaced pattern.4.The apparatus of claim 1, wherein the set of TCI state fields are mapped to a first set of octets in the MAC-CE and the set of PL offset fields are mapped to a second set of octets in the MAC-CE, wherein the first set of octets is earlier in a time domain than the second set of octets.5.The apparatus of claim 1, wherein the MAC-CE further includes a serving cell identifier (ID) and a bandwidth part (BWP) ID before the set of TCI state fields and the set of PL offset fields.6.The apparatus of claim 1, wherein the MAC-CE has the variable size and further comprises a sub-header that indicates the variable size, or a set of bits in the MAC-CE indicates a presence of the set of PL offset fields or the set of TCI state fields.7.The apparatus of claim 6, wherein the set of bits indicates the first quantity of the set of TCI state fields or the second quantity of the set of PL offset fields.8.The apparatus of claim 6, wherein each bit of the set of bits is mapped to a corresponding TCI state in the set of TCI state fields or a corresponding PL offset field of the set of PL offset fields, and wherein the set of bits is mapped to a set of octets before the corresponding PL offset field or the corresponding TCI state field.9.The apparatus of claim 6, wherein each bit of the set of bits is mapped to a corresponding TCI state in the set of TCI state fields or a corresponding PL offset field of the set of PL offset fields, and wherein each bit of the set of bits is mapped to an octet of a set of octets to indicate the corresponding PL offset field or the corresponding TCI state field in a next octet.10.The apparatus of claim 1, wherein one bit in the MAC-CE indicates whether a common PL offset is applied to a set of configured joint or uplink TCI states, and wherein each of the set of configured joint or uplink TCI states is configured with a PL offset.11.An apparatus for wireless communication at a user equipment (UE) , comprising:at least one memory; andat least one processor coupled to the at least one memory, and based at least in part on information stored in the at least one memory, the at least one processor is configured to:receive, from a network entity, a medium access control (MAC) control element (MAC-CE) comprising a first set of pathloss (PL) offset fields associated with a first set of transmission configuration indicator (TCI) state identifiers (IDs) of activated TCI states and a second set of PL offset fields associated with a second set of TCI state IDs of non-activated TCI states, wherein the MAC-CE includes the second set of TCI state IDs without the first set of TCI state IDs; andcommunicate with the network entity based on the MAC-CE.12.The apparatus of claim 11, wherein each PL offset field in the first set of PL offset fields is mapped to a joint or uplink TCI state corresponding to a TCI codepoint and associated with the first set of TCI state IDs based on an ordinal position within the first set of PL offset fields.13.The apparatus of claim 11, wherein each PL offset field in the first set of PL offset fields corresponds to an active joint or uplink TCI state corresponding to a TCI codepoint. 14.The apparatus of claim 11, wherein each PL offset field in the first set of PL offset fields corresponding to an active joint or uplink TCI state is present based on the active joint or uplink TCI state being configured with a PL offset, or wherein each PL offset field in the first set of PL offset fields corresponding to the active joint or uplink TCI state is not present based on the active joint or uplink TCI state not being configured with the PL offset.15.The apparatus of claim 11, wherein the MAC-CE includes a set of bits to indicate a presence of each PL offset field in the first set of PL offset fields.16.The apparatus of claim 11, wherein a quantity of the second set of PL offset fields is fixed or configured via radio resource control (RRC) signaling or the quantity of the second set of PL offset fields is variable.17.The apparatus of claim 11, wherein the MAC-CE further includes a serving cell identifier (ID) and a bandwidth part (BWP) ID at a beginning of the MAC-CE before other fields of the MAC-CE.18.An apparatus for wireless communication at a user equipment (UE) , comprising:at least one memory; andat least one processor coupled to the at least one memory, and based at least in part on information stored in the at least one memory, the at least one processor is configured to:receive, from a network entity, a medium access control (MAC) control element (MAC-CE) comprising a first set of pathloss (PL) offset fields associated with a first set of transmission configuration indicator (TCI) states and a bitmap that indicates a presence of the first set of PL offset fields and an absence of a second set of PL offset fields associated with a second set of TCI states; andcommunicate with the network entity based on the MAC-CE.19.The apparatus of claim 18, wherein each bit field in the bitmap that has a value of one corresponds to a respective PL offset field in the first set of PL offset fields that is present, and wherein each bit field in the bitmap that has a value of zero corresponds to a respective PL offset field in the second set of PL offset fields that is absent.20.The apparatus of claim 18, wherein each of the bitmap is mapped to a given TCI state ID based at least in part on an index of a bit in the bitmap, and wherein the first set of TCI states are mapped to the first set of PL offset fields based on a respective ordinal position of a corresponding PL offset field, and wherein a first set of TCI state identifiers (IDs) associated with the first set of TCI states and a second set of TCI state IDs is absent from the MAC-CE.