Suspension indication for CSI-RS transmission
Non-real-time suspension indication of CSI-RSs using MAC-CE/RRC messaging addresses latency and overhead issues in 5G-NR networks by updating UE training datasets, enhancing beam management efficiency.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-10-04
- Publication Date
- 2026-04-09
AI Technical Summary
Conventional wireless communication systems face issues with CSI-RS measurements being invalidated due to unscheduled transmissions, leading to inaccurate channel state information and inefficient beam management, particularly in 5G-NR networks, where large numbers of beams necessitate frequent scheduling restrictions and real-time suspension notifications that cause latency and overhead.
Implementing non-real-time suspension indication of CSI-RSs using MAC-CE/RRC messaging to notify UEs of historical CSI-RS suspensions, allowing UEs to update training datasets and improve beam prediction models without real-time interruptions.
Reduces latency and downlink overhead, enhances beam management efficiency by providing reliable and efficient messaging for CSI-RS suspension notifications, improving data acquisition for AI/ML models.
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Figure CN2024123239_09042026_PF_FP_ABST
Abstract
Description
SUSPENSION INDICATION FOR CSI-RS TRANSMISSIONTECHNICAL FIELD
[0001] Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to suspension indication of channel state information reference signals (CSI-RSs) . Some features may enable and provide improved communications, including higher data rates, higher channel capacity, and higher spectral efficiency.
[0002] INTRODUCTION
[0003] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks may be multiple access networks that support communications for multiple users by sharing the available network resources.
[0004] A wireless communication network may include several components. These components may include wireless communication devices, such as base stations (or node Bs) that may support communication for a number of user equipment (UEs) . A UE may communicate with a base station via downlink and uplink. The downlink (or forward link) refers to the communication link from the base station to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the base station.
[0005] A base station may transmit data and control information on a downlink to a UE or may receive data and control information on an uplink from the UE. On the downlink, a transmission from the base station may encounter interference due to transmissions from neighbor base stations or from other wireless radio frequency (RF) transmitters. On the uplink, a transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with the neighbor base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink.
[0006] As the demand for mobile broadband access continues to increase, the possibilities of interference and congested networks grows with more UEs accessing the long-range wireless communication networks and more short-range wireless systems being deployed in communities. Research and development continue to advance wireless technologies not only to meet the growing demand for mobile broadband access, but to advance and enhance the user experience with mobile communications.
[0007] Channel state information reference signals (CSI-RS) transmitted by a base station (BS) are received by a user equipment (UE) to measure a channel and report channel quality information (channel state information) back to the base station. The measurements performed by the UE are thus available to both the BS and the UE and may be used for determining channel configurations for communications between the UE and BS. For example, low channel quality may cause the BS to change a channel configuration for the UE to improve the UE’s reception.
[0008] BRIEF SUMMARY OF SOME EXAMPLES
[0009] The following summarizes some aspects of the present disclosure to provide a basic understanding of the discussed technology. This summary is not an extensive overview of all contemplated features of the disclosure and is intended neither to identify key or critical elements of all aspects of the disclosure nor to delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in summary form as a prelude to the more detailed description that is presented later.
[0010] Conventionally, a base station may configure a UE for measurements of specific channel state information reference signals (CSI-RS) , sometimes referred to as scheduling the UE’s CSI-RS measurements. However, the base station may determine to not transmit some of the CSI-RS scheduled for the UE. Between the time of configuring of the UE and the time for transmitting the scheduled CSI-RS, conditions may change at the BS causing the BS to not transmit some of the CSI-RS. These non-transmitted CSI-RS may be referred to as suspended CSI-RS. The UE may be unaware of these changes because the BS does not update the UE configuration, such as when there is insufficient opportunity for transmitting a new configuration to the UE before the scheduled CSI-RS. As a result, the UE measures a CSI-RS that was never transmitted, and the resulting CSI-RS measurement is invalid. According to aspects of this disclosure, the BS may transmit an indication to the UE after the scheduled CSI-RS that one or more of the measured CSI-RS were not transmitted. This provides information to the UE that allows the UE to have better information regarding the channel conditions by allowing the UE to disregard certain measured-but-not-transmitted CSI-RS.
[0011] The UE may perform operations based on the indication of the suspended CSI-RS. For example, the UE may discard measurements of suspended CSI-RS. As another example, the UE may not transmit measurements of suspended CSI-RS. In some embodiments, artificial intelligence (AI) or machine learning (ML) may be utilized by UEs and base stations for beam management. In particular, AI / ML models may be used to predict suitable beams based on historical measurements of various beam parameters, such as channel state information (CSI) . Such measurements are often obtained via reference signals (RS) (e.g., CSI-RS) . The effectiveness of these models for improving wireless communication, however, depends on robust and reliable training datasets. Such training datasets may need to be refined or filtered to ensure reliability. The UE may train a local AI / ML model using a training dataset of measurements modified based on the indication of suspended CSI-RS received by the UE. For example, the UE may remove measurements from the training dataset corresponding to measurements performed on suspended CSI-RS. In some embodiments, the training dataset may further include or alternatively include synchronization signal blocks (SSBs) .
[0012] In one aspect of the disclosure, a method for wireless communication by a receiver device includes: receiving, from a transmitter device, a scheduling of a plurality of channel state information reference signals (CSI-RSs) ; transmitting, to the transmitter device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and receiving, from the transmitter device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS. The receiver device may receive the indication as a media access control layer control element (MAC-CE) or as a radio resource control message. In some implementations, the receiver device may receive the indication as a group common downlink control information (GC-DCI) based on a radio network temporary identifier (RNTI) . In some implementations, the receiver device may receive the indication by receiving an identification of at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS. Also or alternatively, the receiver device may receive the indication by receiving identification associated with the at least one non-transmitted CSI-RS.
[0013] In some embodiments, the receiver device may receive the scheduling of the plurality of CSI-RSs by receiving a scheduling one or more CSI-RS resource sets, each CSI-RS resource set comprising one or more CSI-RSs. The one or more CSI-RS resource sets may include at least a first CSI-RS resource set that includes the non-transmitted CSI-RS. Furthermore, the receiver device may receive the indication by receiving an identification of the first CSI-RS resource set that includes the non-transmitted CSI-RS.
[0014] In some embodiments, each CSI-RS of the plurality of CSI-RSs may be associated with one of a prediction target for a set A beam or a measurement resource for a set B beam. Furthermore, the receiver device may receive the indication by receiving an identification of the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.
[0015] In an additional aspect of the disclosure, a receiver device is disclosed that includes a processing system. The processing system includes processing circuitry and memory circuitry that stores code. The processing system is configured to cause the receiver device to:receive, from a transmitter device, a scheduling of a plurality of channel state information reference signals (CSI-RSs) ; transmit, to the transmitter device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and receive, from the transmitter device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS. The processing system may be configured to cause the receiver device to receive the indication as a media access control layer control element (MAC-CE) or as a radio resource control (RRC) message. In some implementations, the processing system may be configured to cause the receiver device to receive the indication by receiving an identification of at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS. Also or alternatively, the processing system may be configured to cause the receiver device to receive the indication by receiving identification associated with the at least one non-transmitted CSI-RS.
[0016] In some embodiments, the processing system may be configured to cause the receiver device to receive the scheduling of the plurality of CSI-RSs by receiving a scheduling one or more CSI-RS resource sets, each CSI-RS resource set comprising one or more CSI-RSs. The one or more CSI-RS resource sets may include at least a first CSI-RS resource set that includes the non-transmitted CSI-RS. Furthermore, the indication may be received by receiving an identification of the first CSI-RS resource set that includes the non-transmitted CSI-RS. In some implementations, the processing system may be configured to cause the receiver device to receive the indication by receiving an identification of the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.
[0017] In some embodiments, the receiver device may be a user equipment (UE) . The transmitter device may be a next generation node B (gNB) . The processing system may be configured to cause the receiver device to receive the scheduling of the plurality of CSI-RSs persistently or semi-persistently, and not in real-time.
[0018] In an additional aspect of the disclosure, an apparatus includes means for receiving, from a transmitter device, a scheduling of a plurality of CSI-RSs; means for transmitting, to the transmitter device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and means for receiving, from the transmitter device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS.
[0019] In an additional aspect of the disclosure, a method for wireless communication by a transmitter device includes: scheduling a plurality of channel state information reference signals (CSI-RSs) for a receiver device; receiving, from the receiver device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and transmitting, to the receiver device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS. The indication may be transmitted as a media access control layer control element (MAC-CE) or as a radio resource control (RRC) message. In some implementations, the indication may be transmitted as a group common downlink control information (GC-DCI) based on a radio network temporary identifier (RNTI) . In some implementations, the transmitter device may transmit the indication by transmitting an identification of at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS. Also or alternatively, the transmitter device may transmit the indication by transmit an identification associated with the at least one non-transmitted CSI-RS.
[0020] In some embodiments, the transmitter device may schedule the plurality of CSI-RSs by scheduling one or more CSI-RS resource sets, each CSI-RS resource set comprising one or more CSI-RSs. The one or more CSI-RS resource sets may include at least a first CSI-RS resource set that includes the non-transmitted CSI-RS. Furthermore, the transmitter device may transmit the indication by transmitting an identification of the first CSI-RS resource set that includes the non-transmitted CSI-RS.
[0021] In some embodiments, each CSI-RS of the plurality of CSI-RSs may be associated with one of a prediction target for a set A beam or a measurement resource for a set B beam. Furthermore, the transmitter device may transmit the indication by transmitting an identification of the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.
[0022] In an additional aspect of the disclosure, a transmitter device is disclosed that includes a processing system. The processing system includes processing circuitry and memory circuitry that stores code. The processing system is configured to cause the transmitter device to: schedule a plurality of channel state information reference signals (CSI-RSs) for a receiver device; receive, from the receiver device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and transmit, to the receiver device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS. The processing system may be configured to cause the transmitter device to transmit the indication as a media access control layer control element (MAC-CE) or as a radio resource control (RRC) message. In some implementations, the processing system may be configured to cause the transmitter device to transmit the indication by transmitting an identification of at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS. Also or alternatively, the processing system may be configured to cause the transmitter device to transmit the indication by transmitting an identification associated with the at least one non-transmitted CSI-RS.
[0023] In some embodiments, the processing system may be configured to cause the transmitter device to schedule the plurality of CSI-RSs by scheduling one or more CSI-RS resource sets, each CSI-RS resource set comprising one or more CSI-RSs. The one or more CSI-RS resource sets may include at least a first CSI-RS resource set that includes the non-transmitted CSI-RS. Furthermore, the processing system may be configured to cause the transmitter device to transmit the indication by transmitting an identification of the first CSI-RS resource set that includes the non-transmitted CSI-RS. In some implementations, the processing system may be configured to cause the transmitter device to transmit the indication by transmitting an identification of the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.
[0024] In some embodiments, the transmitter device may be a next generation node B (gNB) . The receiver device may be a user equipment (UE) . The processing system may be configured to cause the transmitter device to schedule the plurality of CSI-RSs persistently or semi-persistently, and not in real-time.
[0025] In an additional aspect of the disclosure, an apparatus includes means for scheduling the plurality of CSIs for the receiver device; means for receiving, from a receiver device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and means for transmitting, to the receiver device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS.
[0026] In an additional aspect of the disclosure, a non-transitory computer-readable medium stores instructions that, when executed by a processor, cause the processor to perform operations. The operations include receiving, from a transmitter device, a scheduling of a plurality of channel state information reference signals (CSI-RSs) ; transmitting, to the transmitter device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and receiving, from the transmitter device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS.
[0027] In an additional aspect of the disclosure, a non-transitory computer-readable medium stores instructions that, when executed by a processor, cause the processor to perform operations. The operations include scheduling a plurality of channel state information reference signals (CSI-RSs) for a receiver device; receiving, from the receiver device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and transmitting, to the receiver device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS.
[0028] The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.
[0029] While aspects and implementations are described in this application by illustration to some examples, those skilled in the art will understand that additional implementations and use cases may come about in many different arrangements and scenarios. Innovations described herein may be implemented across many differing platform types, devices, systems, shapes, sizes, packaging arrangements. For example, aspects and / or uses 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 innovations may occur. Implementations may range in 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 aspects of the described innovations. In some practical settings, devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described aspects. 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, radio frequency (RF) -chains, power amplifiers, modulators, buffer, processor (s) , interleaver, adders / summers, etc. ) . It is intended that innovations described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc. of varying sizes, shapes, and constitution.BRIEF DESCRIPTION OF THE DRAWINGS
[0030] A further understanding of the nature and advantages of the present disclosure may be realized by reference to the following drawings. In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
[0031] FIG. 1 is a block diagram illustrating details of an example wireless communication system according to one or more aspects.
[0032] FIG. 2 is a block diagram illustrating examples of a base station and a user equipment (UE) according to one or more aspects.
[0033] FIG. 3 is a block diagram illustrating an example wireless communication system that supports non-real-time suspension indication of channel state information reference signals (CSI-RSs) , according to one or more aspects.
[0034] FIG. 4 is a flow diagram illustrating an example process performed by a receiver device that supports non-real-time suspension indication of CSI-RSs, according to one or more aspects.
[0035] FIG. 5 is a block diagram of an example UE that supports non-real-time suspension indication of CSI-RSs, according to one or more aspects.
[0036] FIG. 6 is an example process performed by a transmitter device that supports non-real-time suspension indication of CSI-RSs, according to one or more aspects.
[0037] FIG. 7 is a block diagram of an example base station that supports non-real-time suspension indication of CSI-RSs, according to one or more aspects.
[0038] Like reference numbers and designations in the various drawings indicate like elements.DETAILED DESCRIPTION
[0039] The detailed description set forth below, in connection with the appended drawings, is intended as a description of various configurations and is not intended to limit the scope of the disclosure. Rather, the detailed description includes specific details for the purpose of providing a thorough understanding of the inventive subject matter. It will be apparent to those skilled in the art that these specific details are not required in every case and that, in some instances, well-known structures and components are shown in block diagram form for clarity of presentation.
[0040] The present disclosure provides systems, apparatus, methods, and computer-readable media that support non-real-time suspension indication of channel state information reference signals (CSI-RSs) . Historical measurements of various beam parameters, such as CSI measurements of set B beams, may be used to predict suitable parameters of other beams, for example, the CSI measurements (or other prediction targets) of set A beams. In some aspects, such historical measurements may be used to train AI / ML models. However, conventional techniques for obtaining such historical measurements are problematic. For example, evolutions in radio access technology (RAT) , such as fifth generation new radio technology (5G-NR) , often involve the scheduling of large numbers of set A and set B beams persistently or semi-persistently. The large numbers of beams typically necessitate large numbers of CSI-RSs for data acquisition, often resulting in frequent and / or severe scheduling restrictions. The scheduling restrictions may be prompted by a need to avoid potential interference between beams and / or by UE’s more urgent traffic requirements. Conventional techniques for obtaining beam data, such as through the use of aperiodic CSI-RSs, are impractical as they often consume more scheduling DCI overhead when compared to persistent or semipersistent (P / SP) CSI-RSs.
[0041] Furthermore, base stations may occasionally suspend transmission one or more CSI-RSs to the UE. However if an CSI-RSs is prevented from being transmitted to the UE, the base station may need to notify the UE of the non-transmission of the one or more CSI-RSs during a given period. Such suspension notifications may involve notifying the UE via radio resource control (RRC) (e.g., for persistent CSI-RS) or via MAC-CE or DCI-based deactivation or reactivation (e.g., for semi-persistent CSI-RS) .
[0042] However, such suspension notifications exacerbate latency and create unnecessary interruptions. For example, in the case of persistent CSI-RSs via RRC, a base station would have to reconfigure the RRC to stop the transmission of a CSI-RS. However, the RRC reconfiguration process may itself occur over a time period (referred to as RRC reconfiguration latency) , which may be longer than the time period in which the CSI-RSs are to be suspended. Thus, during the RRC reconfiguration process, some CSI-RSs may be prevented from being scheduled as a result of RRC reconfiguration latency, even though those CSI-RSs were not intended to be restricted. This wastes an opportunity to develop beams, thus causing unnecessary latency in beam formation. Furthermore, in the case of semipersistent CSI-RSs via MAC-CEs or DCIs, deactivation and reactivation messages for SP CSI-RSs would need to be sent frequently in real-time, causing large downlink overhead.
[0043] Various embodiments described in the present disclosure address one or more of the aforementioned shortcomings in the techniques for indicating suspension of CSI-RSs. In various embodiments, a base station, such as gNB, may suspend transmission of persistent or semipersistent CSI-RSs with respect to set A or set B beams, outside of real-time (e.g., in non-real-time) using previously scheduled CSI-RSs, thereby averting or reducing the latency issues caused by the aforementioned real-time suspension indication methods. Furthermore, such notifications to the UE of historical suspensions can involve a very long periodicity taking various (e.g., multiple) historical suspensions of CSI-RSs into account. In at least one embodiment, a UE is scheduled by a base station (e.g., gNB) with one or more sets of periodic / semi-persistent (P / SP) CSI-RS resources. The base station may further transmit an associated ID linked with the CSI-RS resources. The UE may generate a one or more measurements based on the CSI-RS resources, for example, for the training of an AI / ML model for beam prediction. The UE may further receive a MAC-CE / RRC message indicating that one or more of the CSI-RS resources in one or more of historical occasions should be considered as not transmitted (also referred to herein as non-transmitted CSI-RS) . The historical occasion in which the non-transmitted CSI-RS occurred may not necessarily be the most recent. Moreover, the historical occasion may have occurred over a long period and / or may span or include multiple non-transmitted CSI-RSs. The UE may utilize this indication of non-transmitted CSI-RS, for example, to filter or update its training data as appropriate.
[0044] Particular implementations of the subject matter described in this disclosure may be implemented to realize one or more of the following potential advantages or benefits. In some aspects, the present disclosure provides techniques for much less interruptions for data acquisition (e.g., for the purposes of training AI / ML models for beam management) , reduced latency, and / or reduced downlink overhead compared to conventional techniques for beam management data acquisition. The use of MAC-CE / RRC messaging for indicate the non-transmitted CSI-RSs is a less expensive and more reliable and efficient form of messaging compared to other techniques (e.g. group common-DCI (GC-DCI) ) . For example, there is much better reliability of the messaging based on explicit acknowledgement protocols (ACK / NACK) on MAC-CE / RRC, even if a UE switched to an alternative cell. Furthermore, the use of MAC-CE / RRC may avert or reduce the need to monitor control information (e.g., DCI) if no suspension has occurred.
[0045] This disclosure further relates generally to providing or participating in authorized shared access between two or more wireless devices in one or more wireless communications systems, also referred to as wireless communications networks. In various implementations, the techniques and apparatus may be used for wireless communication networks such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, 5th Generation (5G) or new radio (NR) networks (sometimes referred to as “5G NR” networks, systems, or devices) , as well as other communications networks. As described herein, the terms “networks” and “systems” may be used interchangeably.
[0046] A CDMA network, for example, may implement a radio technology such as universal terrestrial radio access (UTRA) , cdma2000, and the like. UTRA includes wideband-CDMA (W-CDMA) and low chip rate (LCR) . CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
[0047] A TDMA network may, for example implement a radio technology such as Global System for Mobile Communication (GSM) . The 3rd Generation Partnership Project (3GPP) defines standards for the GSM EDGE (enhanced data rates for GSM evolution) radio access network (RAN) , also denoted as GERAN. GERAN is the radio component of GSM / EDGE, together with the network that joins the base stations (for example, the Ater and Abis interfaces) and the base station controllers (A interfaces, etc. ) . The radio access network represents a component of a GSM network, through which phone calls and packet data are routed from and to the public switched telephone network (PSTN) and Internet to and from subscriber handsets, also known as user terminals or user equipment (UEs) . A mobile phone operator's network may comprise one or more GERANs, which may be coupled with UTRANs in the case of a UMTS / GSM network. Additionally, an operator network may also include one or more LTE networks, or one or more other networks. The various different network types may use different radio access technologies (RATs) and RANs.
[0048] An OFDMA network may implement a radio technology such as evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like. UTRA, E-UTRA, and GSM are part of universal mobile telecommunication system (UMTS) . In particular, long term evolution (LTE) is a release of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP) , and cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) . These various radio technologies and standards are known or are being developed. For example, the 3GPP is a collaboration between groups of telecommunications associations that aims to define a globally applicable third generation (3G) mobile phone specification. 3GPP LTE is a 3GPP project which was aimed at improving UMTS mobile phone standard. The 3GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices. The present disclosure may describe certain aspects with reference to LTE, 4G, or 5G NR technologies; however, the description is not intended to be limited to a specific technology or application, and one or more aspects described with reference to one technology may be understood to be applicable to another technology. Additionally, one or more aspects of the present disclosure may be related to shared access to wireless spectrum between networks using different radio access technologies or radio air interfaces.
[0049] 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that may be implemented using an OFDM-based unified, air interface. To achieve these goals, further enhancements to LTE and LTE-Aare considered in addition to development of the new radio technology for 5G NR networks. The 5G NR will be capable of scaling to provide coverage (1) to a massive Internet of things (IoTs) with an ultra-high density (e.g., ~1 M nodes / km2) , ultra-low complexity (e.g., ~10 s of bits / sec) , ultra-low energy (e.g., ~10+ years of battery life) , and deep coverage with the capability to reach challenging locations; (2) including mission-critical control with strong security to safeguard sensitive personal, financial, or classified information, ultra-high reliability (e.g., ~99.9999%reliability) , ultra-low latency (e.g., ~ 1 millisecond (ms) ) , and users with wide ranges of mobility or lack thereof; and (3) with enhanced mobile broadband including extreme high capacity (e.g., ~ 10 Tbps / km2) , extreme data rates (e.g., multi-Gbps rate, 100+ Mbps user experienced rates) , and deep awareness with advanced discovery and optimizations.
[0050] Devices, networks, and systems may be configured to communicate via one or more portions of the electromagnetic spectrum. The electromagnetic spectrum is often subdivided, based on frequency or 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) . The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. 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” (mmWave) 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 “mmWave” band.
[0051] With the above aspects in mind, unless specifically stated otherwise, it should be understood that 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, it should be understood that the term “mmWave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band.
[0052] 5G NR devices, networks, and systems may be implemented to use optimized OFDM-based waveform features. These features may include scalable numerology and transmission time intervals (TTIs) ; a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) design or frequency division duplex (FDD) design; and advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust mmWave transmissions, advanced channel coding, and device-centric mobility. Scalability of the numerology in 5G NR, with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments. For example, in various outdoor and macro coverage deployments of less than 3 GHz FDD or TDD implementations, subcarrier spacing may occur with 15 kHz, for example over 1, 5, 10, 20 MHz, and the like bandwidth. For other various outdoor and small cell coverage deployments of TDD greater than 3 GHz, subcarrier spacing may occur with 30 kHz over 80 / 100 MHz bandwidth. For other various indoor wideband implementations, using a TDD over the unlicensed portion of the 5 GHz band, the subcarrier spacing may occur with 60 kHz over a 160 MHz bandwidth. Finally, for various deployments transmitting with mmWave components at a TDD of 28 GHz, subcarrier spacing may occur with 120 kHz over a 500 MHz bandwidth.
[0053] The scalable numerology of 5G NR facilitates scalable TTI for diverse latency and quality of service (QoS) requirements. For example, shorter TTI may be used for low latency and high reliability, while longer TTI may be used for higher spectral efficiency. The efficient multiplexing of long and short TTIs to allow transmissions to start on symbol boundaries. 5G NR also contemplates a self-contained integrated subframe design with uplink or downlink scheduling information, data, and acknowledgement in the same subframe. The self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive uplink or downlink that may be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet the current traffic needs.
[0054] For clarity, certain aspects of the apparatus and techniques may be described below with reference to example 5G NR implementations or in a 5G-centric way, and 5G terminology may be used as illustrative examples in portions of the description below; however, the description is not intended to be limited to 5G applications.
[0055] Moreover, it should be understood that, in operation, wireless communication networks adapted according to the concepts herein may operate with any combination of licensed or unlicensed spectrum depending on loading and availability. Accordingly, it will be apparent to a person having ordinary skill in the art that the systems, apparatus and methods described herein may be applied to other communications systems and applications than the particular examples provided.
[0056] While aspects and implementations are described in this application by illustration to some examples, those skilled in the art will understand that additional implementations and use cases may come about in many different arrangements and scenarios. Innovations described herein may be implemented across many differing platform types, devices, systems, shapes, sizes, packaging arrangements. For example, implementations or uses may come about via integrated chip implementations or other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail devices or purchasing devices, medical devices, 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 innovations may occur. Implementations may range from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more described aspects. In some practical settings, devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described aspects. It is intended that innovations described herein may be practiced in a wide variety of implementations, including both large devices or small devices, chip-level components, multi-component systems (e.g., radio frequency (RF) -chain, communication interface, processor) , distributed arrangements, end-user devices, etc. of varying sizes, shapes, and constitution.
[0057] FIG. 1 is a block diagram illustrating details of an example wireless communication system according to one or more aspects. The wireless communication system may include wireless network 100. Wireless network 100 may, for example, include a 5G wireless network. As appreciated by those skilled in the art, components appearing in FIG. 1 are likely to have related counterparts in other network arrangements including, for example, cellular-style network arrangements and non-cellular-style-network arrangements (e.g., device to device or peer to peer or ad hoc network arrangements, etc. ) .
[0058] Wireless network 100 illustrated in FIG. 1 includes a number of base stations 105 and other network entities. A base station may be a station that communicates with the UEs and may also be referred to as an evolved node B (eNB) , a next generation eNB (gNB) , an access point, and the like. Each base station 105 may provide communication coverage for a particular geographic area. In 3GPP, the term “cell” may refer to this particular geographic coverage area of a base station or a base station subsystem serving the coverage area, depending on the context in which the term is used. In implementations of wireless network 100 herein, base stations 105 may be associated with a same operator or different operators (e.g., wireless network 100 may include a plurality of operator wireless networks) . Additionally, in implementations of wireless network 100 herein, base station 105 may provide wireless communications using one or more of the same frequencies (e.g., one or more frequency bands in licensed spectrum, unlicensed spectrum, or a combination thereof) as a neighboring cell. In some examples, an individual base station 105 or UE 115 may be operated by more than one network operating entity. In some other examples, each base station 105 and UE 115 may be operated by a single network operating entity.
[0059] A base station may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, or other types of cell. A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider. A small cell, such as a pico cell, would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider. A small cell, such as a femto cell, would also generally cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) . A base station for a macro cell may be referred to as a macro base station. A base station for a small cell may be referred to as a small cell base station, a pico base station, a femto base station or a home base station. In the example shown in FIG. 1, base stations 105d and 105e are regular macro base stations, while base stations 105a-105c are macro base stations enabled with one of 3 dimension (3D) , full dimension (FD) , or massive MIMO. Base stations 105a-105c take advantage of their higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity. Base station 105f is a small cell base station which may be a home node or portable access point. A base station may support one or multiple (e.g., two, three, four, and the like) cells.
[0060] Wireless network 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time. In some scenarios, networks may be enabled or configured to handle dynamic switching between synchronous or asynchronous operations.
[0061] UEs 115 are dispersed throughout the wireless network 100, and each UE may be stationary or mobile. It should be appreciated that, although a mobile apparatus is commonly referred to as a UE in standards and specifications promulgated by the 3GPP, such apparatus may additionally or otherwise be referred to by those skilled in the art as a mobile station (MS) , 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 (AT) , a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, a gaming device, an augmented reality device, vehicular component, vehicular device, or vehicular module, or some other suitable terminology. Within the present document, a “mobile” apparatus or UE need not necessarily have a capability to move, and may be stationary. Some non-limiting examples of a mobile apparatus, such as may include implementations of one or more of UEs 115, include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a laptop, a personal computer (PC) , a notebook, a netbook, a smart book, a tablet, and a personal digital assistant (PDA) . A mobile apparatus may additionally be an IoT or “Internet of everything” (IoE) device such as an automotive or other transportation vehicle, a satellite radio, a global positioning system (GPS) device, a global navigation satellite system (GNSS) device, a logistics controller, a drone, a multi-copter, a quad-copter, a smart energy or security device, a solar panel or solar array, municipal lighting, water, or other infrastructure; industrial automation and enterprise devices; consumer and wearable devices, such as eyewear, a wearable camera, a smart watch, a health or fitness tracker, a mammal implantable device, gesture tracking device, medical device, a digital audio player (e.g., MP3 player) , a camera, a game console, etc.; and digital home or smart home devices such as a home audio, video, and multimedia device, an appliance, a sensor, a vending machine, intelligent lighting, a home security system, a smart meter, etc. In one aspect, a UE may be a device that includes a Universal Integrated Circuit Card (UICC) . In another aspect, a UE may be a device that does not include a UICC. In some aspects, UEs that do not include UICCs may also be referred to as IoE devices. UEs 115a-115d of the implementation illustrated in FIG. 1 are examples of mobile smart phone-type devices accessing wireless network 100 A UE may also be a machine specifically configured for connected communication, including machine type communication (MTC) , enhanced MTC (eMTC) , narrowband IoT (NB-IoT) and the like. UEs 115e-115k illustrated in FIG. 1 are examples of various machines configured for communication that access wireless network 100.
[0062] A mobile apparatus, such as UEs 115, may be able to communicate with any type of the base stations, whether macro base stations, pico base stations, femto base stations, relays, and the like. In FIG. 1, a communication link (represented as a lightning bolt) indicates wireless transmissions between a UE and a serving base station, which is a base station designated to serve the UE on the downlink or uplink, or desired transmission between base stations, and backhaul transmissions between base stations. UEs may operate as base stations or other network nodes in some scenarios. Backhaul communication between base stations of wireless network 100 may occur using wired or wireless communication links.
[0063] In operation at wireless network 100, base stations 105a-105c serve UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity. Macro base station 105d performs backhaul communications with base stations 105a-105c, as well as small cell, base station 105f. Macro base station 105d also transmits multicast services which are subscribed to and received by UEs 115c and 115d. Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
[0064] Wireless network 100 of implementations supports mission critical communications with ultra-reliable and redundant links for mission critical devices, such UE 115e, which is a drone. Redundant communication links with UE 115e include from macro base stations 105d and 105e, as well as small cell base station 105f. Other machine type devices, such as UE 115f (thermometer) , UE 115g (smart meter) , and UE 115h (wearable device) may communicate through wireless network 100 either directly with base stations, such as small cell base station 105f, and macro base station 105e, or in multi-hop configurations by communicating with another user device which relays its information to the network, such as UE 115f communicating temperature measurement information to the smart meter, UE 115g, which is then reported to the network through small cell base station 105f. Wireless network 100 may also provide additional network efficiency through dynamic, low-latency TDD communications or low-latency FDD communications, such as in a vehicle-to-vehicle (V2V) mesh network between UEs 115i-115k communicating with macro base station 105e.
[0065] FIG. 2 is a block diagram illustrating examples of base station 105 and UE 115 according to one or more aspects. Base station 105 and UE 115 may be any of the base stations and one of the UEs in FIG. 1. For a restricted association scenario (as mentioned above) , base station 105 may be small cell base station 105f in FIG. 1, and UE 115 may be UE 115c or 115d operating in a service area of base station 105f, which in order to access small cell base station 105f, would be included in a list of accessible UEs for small cell base station 105f. Base station 105 may also be a base station of some other type. As shown in FIG. 2, base station 105 may be equipped with antennas 234a through 234t, and UE 115 may be equipped with antennas 252a through 252r for facilitating wireless communications.
[0066] At base station 105, transmit processor 220 may receive data from data source 212 and control information from controller 240, such as a processor. The control information may be for a physical broadcast channel (PBCH) , a physical control format indicator channel (PCFICH) , a physical hybrid-ARQ (automatic repeat request) indicator channel (PHICH) , a physical downlink control channel (PDCCH) , an enhanced physical downlink control channel (EPDCCH) , an MTC physical downlink control channel (MPDCCH) , etc. The data may be for a physical downlink shared channel (PDSCH) , etc. Additionally, transmit processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Transmit processor 220 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) and secondary synchronization signal (SSS) , and cell-specific reference signal. Transmit (TX) MIMO processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, or the reference symbols, if applicable, and may provide output symbol streams to modulators (MODs) 232a through 232t. For example, spatial processing performed on the data symbols, the control symbols, or the reference symbols may include precoding. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream. Each modulator 232 may additionally or alternatively process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from modulators 232a through 232t may be transmitted via antennas 234a through 234t, respectively.
[0067] At UE 115, antennas 252a through 252r may receive the downlink signals from base station 105 and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols. MIMO detector 256 may obtain received symbols from demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. Receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 115 to data sink 260, and provide decoded control information to controller 280, such as a processor.
[0068] On the uplink, at UE 115, transmit processor 264 may receive and process data (e.g., for a physical uplink shared channel (PUSCH) ) from data source 262 and control information (e.g., for a physical uplink control channel (PUCCH) ) from controller 280. Additionally, transmit processor 264 may also generate reference symbols for a reference signal. The symbols from transmit processor 264 may be precoded by TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for SC-FDM, etc. ) , and transmitted to base station 105. At base station 105, the uplink signals from UE 115 may be received by antennas 234, processed by demodulators 232, detected by MIMO detector 236 if applicable, and further processed by receive processor 238 to obtain decoded data and control information sent by UE 115. Receive processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller 240.
[0069] Controllers 240 and 280 may direct the operation at base station 105 and UE 115, respectively. Controller 240 or other processors and modules at base station 105 or controller 280 or other processors and modules at UE 115 may perform or direct the execution of various processes for the techniques described herein, such as to perform or direct the execution illustrated in FIGs. 3, 4 and 6, or other processes for the techniques described herein. Memories 242 and 282 may store data and program codes for base station 105 and UE 115, respectively. Scheduler 244 may schedule UEs for data transmission on the downlink or the uplink.
[0070] In some cases, UE 115 and base station 105 may operate in a shared radio frequency spectrum band, which may include licensed or unlicensed (e.g., contention-based) frequency spectrum. In an unlicensed frequency portion of the shared radio frequency spectrum band, UEs 115 or base stations 105 may traditionally perform a medium-sensing procedure to contend for access to the frequency spectrum. For example, UE 115 or base station 105 may perform a listen-before-talk or listen-before-transmitting (LBT) procedure such as a clear channel assessment (CCA) prior to communicating in order to determine whether the shared channel is available. In some implementations, a CCA may include an energy detection procedure to determine whether there are any other active transmissions. For example, a device may infer that a change in a received signal strength indicator (RSSI) of a power meter indicates that a channel is occupied. Specifically, signal power that is concentrated in a certain bandwidth and exceeds a predetermined noise floor may indicate another wireless transmitter. A CCA also may include detection of specific sequences that indicate use of the channel. For example, another device may transmit a specific preamble prior to transmitting a data sequence. In some cases, an LBT procedure may include a wireless node adjusting its own backoff window based on the amount of energy detected on a channel or the acknowledge / negative-acknowledge (ACK / NACK) feedback for its own transmitted packets as a proxy for collisions.
[0071] FIG. 3 is a block diagram of an example wireless communications system 300 that supports non-real-time suspension indication of channel state information reference signals (CSI-RSs) , according to one or more aspects. In some examples, wireless communications system 300 may implement aspects of wireless network 100. Wireless communications system 300 includes UE 115 and base station 105. Although one UE 115 and one base station 105 are illustrated, in some other implementations, wireless communications system 300 may generally include multiple UEs 115, and may include more than one base station 105.
[0072] UE 115 may include a variety of components (such as structural, hardware components) used for carrying out one or more functions described herein. For example, these components may include one or more processors 302 (hereinafter referred to collectively as “processor 302” ) , one or more memory devices 304 (hereinafter referred to collectively as “memory 304” ) , one or more transmitters 316 (hereinafter referred to collectively as “transmitter 316” ) , and one or more receivers 318 (hereinafter referred to collectively as “receiver 318” ) . Processor 302 may be configured to execute instructions stored in memory 304 to perform the operations described herein. In some implementations, processor 302 includes or corresponds to one or more of receive processor 258, transmit processor 264, and controller 280, and memory 304 includes or corresponds to memory 282.
[0073] Memory 304 includes or is configured to store machine readable instructions to facilitate non-real-time suspension indication of CSI-RSs. For example, the memory 304 may include or may be configured to store a CSI-RS measurement logic 305, which may comprise logical circuitry configured to cause, or may comprise machine readable instructions that (when executed by the processor 302) may cause, the UE 115 to use a CSI-RS to generate CSI measurements indicating, for example, a quality or other parameter of a channel. In some embodiments, the memory 304 may further include a database or repository of identifications (referred to herein as ID repository) 306. Each identification may be associated with a CSI-RS and / or a set of CSI-RS. In some embodiments, the ID repository 306 may further store IDs associated with different modules, base stations, and / or cells. In some embodiments, the memory 304 may include or may be configured to store measurements generated by the UE 115 (e.g., based on the CSI-RS) and / or refined or filtered based on indications of non-transmitted CSI-RSs received by the base station 105, which may be used for the training of AI / ML models to infer various parameters for beam formation (e.g., set A beam parameters) . Such measurements used for training may be referred to as training data 307. In some embodiments, the training data 307 may further include or may alternatively include synchronization signal block (SSB) measurements. In some embodiments, the training and inference may occur remotely from the UE (e.g., at a third party server) . In such embodiments, the UE may transmit all or portions of the training data 307 for the training and / or inference of the AI / ML models. Also or alternatively, in some embodiments, the memory 304 may include or may be configured to store the AI / ML models (e.g., AI / ML model 308) used for the inference of beam properties.
[0074] Transmitter 316 is configured to transmit reference signals, control information and data to one or more other devices, and receiver 318 is configured to receive references signals, synchronization signals, control information and data from one or more other devices. For example, transmitter 316 may transmit signaling, control information and data to, and receiver 318 may receive signaling, control information and data from, base station 105. In some implementations, transmitter 316 and receiver 318 may be integrated in one or more transceivers. Additionally or alternatively, transmitter 316 or receiver 318 may include or correspond to one or more components of UE 115 described with reference to FIG. 2.
[0075] Base station 105 may include a variety of components (such as structural, hardware components) used for carrying out one or more functions described herein. For example, these components may include one or more processors 352 (hereinafter referred to collectively as “processor 352” ) , one or more memory devices 354 (hereinafter referred to collectively as “memory 354” ) , one or more transmitters 356 (hereinafter referred to collectively as “transmitter 356” ) , and one or more receivers 358 (hereinafter referred to collectively as “receiver 358” ) . Processor 352 may be configured to execute instructions stored in memory 354 to perform the operations described herein. In some implementations, processor 352 includes or corresponds to one or more of receive processor 238, transmit processor 220, and controller 240, and memory 354 includes or corresponds to memory 242.
[0076] Memory 354 includes or is configured to store machine readable instructions to facilitate non-real-time suspension indication of CSI-RSs. For example, the memory 354 may include or may be configured to store a CSI-RS scheduling logic 360, which may comprise logical circuitry configured to cause, or machine readable instructions that (when executed by the processor 352) may cause, the base station 105 to schedule CSI-RSs for the UE 115. In some embodiments, the memory 354 may include or may be configured to store a non-transmitted CSI-RS indicator logic 361. The CSI-RS indicator logic 361 may include logical circuitry configured to cause, or machine readable instructions that (when executed by the processor 352) may cause, the base station 105 to indicate a CSI-RS as being non-transmitted. For example, the base station 105 may retrieve IDs associated with a CSI-RS of a historical time period in which CSI-RS were non-transmitted.
[0077] In some embodiments, the memory 354 may include or may be configured to store historical CSI-RS information. For example, the historical CSI-RS information may be stored in a database as shown in FIG. 3 (historical CSI-RS database 363) . The historical CSI-RS information may include but is not limited to, the start and end times of historical CSI-RSs or of historical time windows; identifications of historical time windows or CSI-RS transmission occasions; identifications of the modules, cells, base stations, UEs, and / or channels associated with the CSI-RSs; identifications of the CSI-RS sets associated with each CSI-RS; and / or the measurements, characteristics or parameters associated with each CSI-RS. For example, the memory 354 and / or the historical CSI-RS database 363 may further include or may be configured to store an ID repository (e.g., ID repository 364) , which may store identifications associated with a CSI-RS, a set of CSI-RS, and / or IDs associated with different modules, base stations, and / or cells..
[0078] Transmitter 356 is configured to transmit reference signals, synchronization signals, control information and data to one or more other devices, and receiver 358 is configured to receive reference signals, control information and data from one or more other devices. For example, transmitter 356 may transmit signaling, control information and data to, and receiver 358 may receive signaling, control information and data from, UE 115. In some implementations, transmitter 356 and receiver 358 may be integrated in one or more transceivers. Additionally or alternatively, transmitter 356 or receiver 358 may include or correspond to one or more components of base station 105 described with reference to FIG. 2.
[0079] In some implementations, wireless communications system 300 implements a 5G NR network. For example, wireless communications system 300 may include multiple 5G-capable UEs 115 and multiple 5G-capable base stations 105, such as UEs and base stations configured to operate in accordance with a 5G NR network protocol such as that defined by the 3GPP.
[0080] During operation of wireless communications system 300, the base station 105 may schedule a plurality of CSI-RSs for the UE 115 (block 370) . The scheduling may be generated by the CSI-RS scheduling logic 360 and transmitted by the base station 105 to, and received by, the UE 115. The scheduling may be transmitted persistently or semi-persistently (P / SP) via MAC-CE protocol. In some embodiments, the scheduled CSI-RSs may be sets of CSI-RSs. Each CSI-RS and / or sets of CSI-RSs may be identifiable via associated IDs. Furthermore, the associated IDs may be stored, for example, in ID repository 306 and 364 to link associated measurements and / or datasets formed.
[0081] The UE 115 may transmit, to the base station 105, one or more measurements corresponding to one or more of the plurality of CSI-RSs (block 380) . For example, the UE may use the one or more CSI-RSs to generate measurements (e.g., via the CSI measurement logic 305) . The measurements may include but are not limited to channel quality information (CQI) of a channel between the UE 115 and the base station 105 for the purpose of determining the correct modulation, code rate, beam forming etc. For example, the UE 115 may generate measurements (e.g., via the CSI measurement logic 305) of a channel intended for set B beams. In some embodiments, the one or more CSI-RSs for which the measurements are generated by the UE 115, may not include non-transmitted CSI-RSs. In some embodiments, after these measurements are received by the base station 105, the measurements may be stored in the historical CSI-RS database 363 and linked to their associated CSI-RS via associated IDs.
[0082] Furthermore, the base station 105 may transmit, to the UE 115, an indication that at least one CSI-RS of the plurality of scheduled CSI-RSs is a non-transmitted CSI-RS (block 390) (also referred to as a suspended CSI-RS) . For example, the base station 105 may retrieve, in non-real-time, information about CSI-RS that were not transmitted during historical occasions (e.g., from historical CSI-RS database 363) . Those non-transmitted CSI-RS may be identified by their associated IDs (e.g., stored in ID repository 364) and then may be transmitted to the UE 115. Furthermore, the indication of the non-transmitted CSI-RS may be transmitted by the base station 105 via the MAC-CE / RRC messaging protocol.
[0083] As described with reference to FIG. 3, the present disclosure provides techniques for indicating non-transmission of CSI-RSs that are less interruptive for the UE 115 for data acquisition, for example, because the UE 115 need not suspend generating measurements and may continue generating them based on the persistently or semi-persistently received CSI-RSs (e.g., blocks 370 and 380) . The continuity leads to reduced latency, as indications of non-transmitted CSI-RS are received by the UE 115 afterwards based on historical (e.g., non-real-time) data. Furthermore, the use of MAC-CE / RRC as a messaging protocol for the indication of non-transmitted CSI-RS by the base station 105 is a less expensive, more reliable, and more efficient form of messaging compared to conventional techniques (e.g., group common-DCI (GC-DCI) used in preemption indication) , leading to reduced downlink overhead.
[0084] In various embodiments, different signaling may be employed by the base station for providing the indication to the UE. In some embodiments, the UE may be scheduled by the base station with one or more sets of periodic / semi-persistent (P / SP) CSI-RS resources, together with a associated identifications of the CSI-RS resources. The base station may then transmit, and the UE may receive, a MAC-CE / RRC message indicating that one or more of the CSI-RS resources in one or more historical transmission occasions or historical time windows are considered as non-transmitted.
[0085] In some embodiments, the indication of any non-transmitted CSI-RS may include or may be signaled by an identification of a historical occasion (e.g., a historical time window or a historical CSI-RS transmission occasion) and / or by an identification to a CSI-RS. For example, in some aspects, one or more historical time windows are signaled, such that the CSI-RSs scheduled during such windows can be considered as non-transmitted. Such historical time windows can be signaled by an indication of a start and end time for that historical occasion, or by indicating an applicable and / or most recent identifier (e.g., system frame, subframe, slot, symbol) as a substitute for or a clarification of the start and end times for the historical occasion. In some embodiments, any CSI-RSs scheduled during the indicated historical time windows can be considered as non-transmitted. Also or alternatively, for a given historical time window, specific CSI-RSs that are non-transmitted may be further indicated (e.g., using identifications for the specific CSI-RSs) .
[0086] In some embodiments, the base station may identify or signal one or more historical CSI-RS transmission occasions in the indication, such that CSI-RSs scheduled during such historical CSI-RS transmission occasions can be considered as non-transmitted. A historical CSI-RS transmission occasion may be distinguishable from a historical time window in that the historical CSI-RS transmission occasion may be defined by CSI-RS transmissions whereas a historical time window may be defined by a start and end time (e.g., irrespective of any CSI-RS transmissions occurring within those times) . The base station may identify or signal a historical CSI-RS transmission occasion by referencing an applicable and / or most recent identifier (e.g., system frame, subframe, slot, symbol, etc. ) for the historical CSI-RS transmission occasion, and / or or by referring to one or more positive integers {1, 2, 3, …} where an integer represents the a ranking of the most recent CSI-RS occasion {1st (most) recent, 2nd recent, 3rd recent, etc. } before the slot carrying the MAC-CE / RRC. In some embodiments, any CSI-RSs scheduled during the historical CSI-RS transmission occasion identified in the indication may be considered as non-transmitted. Alternatively, the base station may further identify, for an identified historical CSI-RS transmission occasion, a specific one or more CSI-RSs that are non-transmitted in the indication. The specific one or more non-transmitted CSI-RS may be identified using an identifier, which may be stored in an ID repository (e.g., ID repository 306) or otherwise recognizable to the UE.
[0087] In some embodiments, the base station may schedule the plurality of CSI-RSs (e.g., at block 370) as part of scheduling one or more CSI-RS resource sets, where each CSI-RS resource set may include one or more CSI-RSs. In such embodiments, one or more identifiers of the CSI-RS resource sets can be indicated, for each time window or transmission occasion. This identification may allow the base station to efficiently indicate (e.g., at block 390) that CSI-RSs comprised by the an identified CSI-RS resource sets are to be considered to be non-transmitted during an associated time window and / or transmission occasion. In at least one embodiment, CSI-RS resource sets may be scheduled by a list, comprised of one or more NZP-CSI-RS-ResourceSetIds defined in the CSI-MeasConfig under corresponding ServCell, such that identifiers of the CSI-RS resource sets indicated using the MAC-CE / RRC protocol may be their entry-IDs defined in the list. In some aspects, one or more NZP-CSI-RS-ResourceSetIds may be defined in CSI-MeasConfig under the corresponding ServCell. In some embodiments, for example, where only a single CSI-RS resource set is scheduled, one or more identifiers of the CSI-RS resources within the CSI-RS resource set may be indicated, for each time window and / or transmission occasion applicable to the CSI-RS resource set, such that CSI-RSs comprised by the indicated CSI-RS resource sets can be considered to be non-transmitted during the associated time window and / or transmission occasion.
[0088] In some embodiments, during the transmission of the indication of the non-transmitted CSI-RS under MAC-CE / RRC, the identifiers of the non-transmitted CSI-RS under MAC-CE / RRC may be their entry-IDs defined in their associated CSI-RS resource set. In some aspects, the identifiers may identify the NZP-CSI-RS-ResourceIds defined in the CSI-MeasConfig under the corresponding ServCell.
[0089] In some embodiments, a each CSI-RS resource or resource set may be indicated by the base station (e.g., gNB) as being associated with a Set A beam (e.g., a prediction target for the Set A beam) and / or a Set B beam (e.g., a measurement resource for the set B beam) . The measurements based on the CSI-RS resource or resource set may be used by the UE for training data for beam prediction. In some embodiments, the measurements may further include synchronization signal block (SSB) measurements, which may be used in the training data. In such embodiments, for each time window and / or transmission occasion, the MAC-CE / RRC messaging may signal one or two set identifier (s) among Set Aand / or Set B beams, such that the corresponding CSI-RSs of those sets may be considered as non-transmitted for the corresponding historical time window and / or historical transmission occasion.
[0090] The UE and / or base station may readily associate, or identify the connection between, a CSI-RS resource and a certain Set A beam (e.g., a prediction target for the Set A beam) and / or a Set B beam (e.g., a measurement resource for the Set B beam) . For each historical time window and / or historical transmission occasion, the MAC-CE / RRC messaging may indicate one or more identifications of a Set A beam (e.g., a prediction target for the Set A beam) and / or a Set B beam (e.g., a measurement resource for the Set B beam) , such that their respective CSI-RSs may be considered as non-transmitted for the corresponding historical time window and / or historical transmission occasion.
[0091] In some embodiments, non-transmitted CSI-RSs may be indicated via various associated identifications. For example, the MAC-CE / RRC messaging may further indicate the one or more associated identifications, where each associated identification indicated by the MAC-CE / RRC protocol may complement or further signal the information considered by the aforementioned proposals for indicating the non-transmitted CSI-RSs.
[0092] In some embodiments, the base station may indicate the non-transmission of CSI-RSs with respect to various cells. For example, the MAC-CE / RRC messaging may further indicate one or more cell identifier (s) of cell (s) . The cells can be active or inactive, and the cell identifiers may include but are not limited to ServCell IDs, LTM candidate cell IDs, etc. Each cell identifier indicated by the MAC-CE / RRC messaging may complement, or may further signal the non-transmitted CSI-RSs in addition to, the aforementioned proposals for indicating the non-transmitted CSI-RSs. In some embodiments, the cell identifier can also be designed to be able to indicate a previously active cell based on a recent handover (HO) operation. For example, after the HO operation, such cells may have been released from RRC and may become no longer traceable. However, in at least one embodiment, the UE may still be able to identify suspended CSI-RSs from those previous active cells in a non-real-time manner, and allow the UE to remove related measurements from its UE logs.
[0093] In some embodiments, the UE may involve or may be configured to expect the MAC-CE / RRC messaging (e.g., indicating non-transmitted CSI-RSs) . Whether the UE expects such a MAC-CE / RRC Msg may be determined by various factors. For example, the UE may need to be capable of receiving MAC-CE / RRC messaging. This capability may further include a determination whether the UE supports MAC-CE or RRC or both. Furthermore, the UE may be configured to receive MAC-CE / RRC messaging by the scheduling of the candidate CSI-RS resources (e.g., subject to the UE capability being reported to the base station (e.g., via CSI-ReportConfig / CSI-ResourceConfig / NZP-CSI-RS-ResourceSet / NZP-CSI-RS-Resource associated with the candidate CSI-RS resources) . For example, if UE supports only MAC-CE or only RRC, the base station may need to configure only MAC-CE or RRC as expected. However, if UE supports both MAC-CE and RRC, the base station may need to configure one of them or both of them are expected.
[0094] In some embodiments, the base station may employ enhanced downlink control information (DCI) to indicate CSI-RS suspension. For example, the UE may be scheduled by the base station with one or more sets of periodic / semi-persistent (P / SP) CSI-RS resources, and signal identifications associated with the CSI-RS resources. However, the UE may further receive a DCI, indicating one or more of the CSI-RS resources in one or more of historical transmission occasions should be considered as non-transmitted. In some aspects, the DCI may be a group common DCI (GC-DCI) based on a radio network temporary identifier (RNTI) further signaled by the base station. The RNTI may comprise various sub-fields such that the UE would be able to identify the sub-field (s) dedicated to itself. Also or alternatively, the DCI may be a UE-specific DCI, where the aforementioned information is a DCI sub-field of the DCI payload for any candidate UE-specific DCI formats.
[0095] In some embodiments, candidate CSI-RSs for the non-transmitted CSI-RSs may be indicated. For example the UE may further receive a MAC-CE / RRC messaging indicating with candidate CSI-RSs should be associated. Such indication may be based on signaling CSI-ReportConfigId / CSI-ResourceConfigId / NZP-CSI-RS-ResourceId / NZP-CSI-RS-ResourceId’s associated with the candidate CSI-RSs.
[0096] In some embodiments, the DCI payload may extend methodologies considered by preemption indication techniques. For example, UE may further expect that candidate CSI-RSs are based on an identical transmission periodicity. The payload may be comprised of a K-bit bitmap, where each bit may correspond to a CSI-RS transmission occasion among the CSI-RS transmission occasions during the DCI monitoring periodicity between the first symbol of the last DCI and the latest symbol before the current monitored DCI. The bit may indicate whether the corresponding CSI-RS transmission occasion is considered as non-transmitted. Such techniques may complement payload options considered by the aforementioned proposals.
[0097] In some embodiments, the base station may indicate suspension (non-transmission) of CSI-RSs using one or more various associated identifications. For example, the base station may rely on a single associated identification, such as when the UE expects that the DCI is applied to CSI-RSs with respect to a single associated ID. Alternatively, the base station may further signal multiple groups of candidate CSI-RSs that are associated with different associated identifications. The DCI payload may be segmented into multiple sub-fields, respectively associated with multiple associated identifications, where each payload of each sub-field may be based on one or more of the aforementioned embodiments.
[0098] In some embodiments, the base station may indicate suspension (non-transmission) of CSI-RSs with respect to various cells. In at least one embodiment, the base station may further signal multiple groups of candidate CSI-RSs that are associated with different cell identifications. The DCI payload may be segmented into multiple sub-fields, respectively associated with the multiple cell identifications (e.g., active / inactive ServCell IDs, LTM candidate cell IDs, etc. ) . The payload of each sub-field may be based on one or more of the aforementioned embodiments. Whether a UE may be configured to expect or receive the DCI may be based, for example, on the capability of the UE, or on whether the UE reports such capabilities.
[0099] FIG. 4 is a flow diagram illustrating an example process 400 that supports a non-real-time suspension indication of CSI-RSs according to one or more aspects. Operations of process 400 may be performed by a UE, such as UE 115 described above with reference to FIGs. 1, 2, 3, or a UE described with reference to FIG. 5. For example, example operations (also referred to as “blocks” ) of process 400 may enable UE 115 to support non-real-time suspension indication of CSI-RSs.
[0100] In block 402, the UE may receive a scheduling of a plurality of CSI-RSs. As previously discussed, the scheduling may be transmitted to the UE by a base station, such as base station 105. Moreover, the scheduling may allow the UR to identify the times (e.g., start and end times) at which a CSI-RS is generated in order to obtain measurements of parameters sounding or characterizing a channel between or otherwise communicatively linking the UE with the base station. In some embodiments, each CSI-RS of the plurality of CSI-RSs is associated with a set B beam.
[0101] In block 404, the UE may transmit one or more measurements corresponding to one or more of the plurality of CSI-RSs. For example, the UE may use the one or more CSI-RSs to generate measurements (e.g., via the CSI measurement logic 305 of UE 115) . The measurements may include but are not limited to channel quality information (CQI) of a channel between the UE 115 and the base station 105 for the purpose of determining the correct modulation, code rate, beam forming etc. For example, the UE 115 may generate measurements (e.g., via the CSI measurement logic 305) of a channel intended for set B beams. In some embodiments, the UE may transmit these measurements to the base station. In some embodiments, the measurements may further include synchronization signal block (SSB) measurements. After these measurements are received by the base station 105, the measurements may be stored in the historical CSI-RS database 363 and linked to their associated CSI-RS via associated IDs.
[0102] In block 406, the UE may receive an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS. The indication may be transmitted via a media access control layer control element (MAC-CE) , which alleviates downlink overhead, as previously discussed. In some aspects, the indication may include or reference an identification of at least one historical time window associated with the at least one non-transmitted CSI-RS. Also or alternatively, the indication may include or reference an identification of at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS. Also or alternatively, the indication may include or reference an identification associated with the at least one non-transmitted CSI-RS. In some embodiments, the indication may further identify the non-transmitted CSI-RS as being associated with one of the set A beam (e.g., a prediction target for the set A beam) and / or the set B beam (e.g., a measurement resource for the set B beam) .
[0103] In some implementations, the UE may store or use the measurements corresponding to the one or more of the plurality of CSI-RSs as training data (e.g., training data 307) . The training data may be used for the training of one or more AI / ML models (e.g., AI / ML model (s) 308) for the inference of beam parameters for beam formation. In some embodiments, the training model may be used to predict a second plurality of measurements corresponding to a second plurality of CSI-RSs. For example, while the measurements may be associated with the formation of set B beams between the base station and the UE, the measurements may be used as training data to infer the parameters of a set A beam to be used between the UE and another device downstream. The parameters may include a second plurality of measurements corresponding to a second plurality of CSI-RSs. In some embodiments, the training data may be tabulated or organized by associating each measurement and its corresponding CSI-RS based on an identification of the CSI-RS (e.g., using identifications included or stored in the ID repository 306) . In some embodiments, each measurement and / or its corresponding CSI-RS may be further associated with a CSI-RS set, base station, module, and / or cell using associated identifications.
[0104] Furthermore, in some implementations, the UE may refine, filter, or otherwise update its training data based on the received indication of the at least one CSI-RS as a non-transmitted CSI-RS. For example, the UE may remove a measurement corresponding to the non-transmitted CSI-RS. The measurement may be deemed as faulty or poor. The at least one CSI-RS, which the base station has indicated as non-transmitted, may be identified by the UE using an associated ID. In some aspects, the associated ID may be received by the UE with the indication.
[0105] In some implementations, the UE may receive the scheduling of the plurality of CSI-RSs (e.g., at block 402) as part of receiving a scheduling of one or more CSI-RS resource sets, where each CSI-RS resource set may include one or more CSI-RSs. In such embodiments, the one or more CSI-RS resource sets received by the UE may include at least a one CSI-RS resource set that includes at least one CSI-RS that the base station may indicate (e.g., at block 406) _as non-transmitted. Furthermore, the UE may receive the indication by receiving an identification of the first CSI-RS resource set that includes the non-transmitted CSI-RS.
[0106] In some implementations, the receiver device is a user equipment (UE) , wherein the transmitter device is a next generation node B (gNB) , wherein the processing system is configured to cause the receiver device to receive the scheduling of the plurality of CSI-RSs persistently or semi-persistently, and not in real-time.
[0107] Figure 5 is a block diagram of an example UE 500 that supports non-real-time suspension indication of CSI-RSs to one or more aspects. UE 500 may be configured to perform operations, including the blocks of a process described with reference to FIGs. 3 and 4. In some implementations, UE 500 includes the structure, hardware, and components shown and described with reference to UE 115 of FIGs. 1-3. For example, UE 500 includes controller 280, which operates to execute logic or computer instructions stored in memory 282, as well as controlling the components of UE 500 that provide the features and functionality of UE 500. UE 500, under control of controller 280, transmits and receives signals via wireless radios 501a-r and antennas 252a-r. Wireless radios 501a-r include various components and hardware, as illustrated in FIG. 2 for UE 115, including modulator and demodulators 254a-r, MIMO detector 256, receive processor 258, transmit processor 264, and TX MIMO processor 266.
[0108] As shown, memory 282 may include or may be configured to store CSI measurement logic 305, ID repository 306, and training data 307. In some embodiments, the memory 282 may further include or may be further configured to store one or more AI / ML models 308.. As previously discussed, the CSI measurement logic 305 may be configured to cause the UE 115 to use a CSI-RS to generate CSI measurements indicating, for example, a quality or other parameter of a channel. The ID repository 306 may store or include identifications associated with CSI-RSs, sets of CSI-RSs, modules, base stations, and / or cells. The training data 307 may include or may be based on measurements compiled by the UE 115 using the CSI-RS. The training data may be further refined, filtered, or otherwise updated based on received indications of non-transmitted CSI-RS. In some aspects, the training data 307 may include synchronization signal block (SSB) measurements. The training data 307 may be further used to train the AI / ML models 308 to infer various parameters for beam formation (e.g., set A beam parameters) . UE 500 may receive signals from or transmit signals to one or more network entities, such as base station 105 of FIGs. 1-3 or a base station as illustrated in FIG. 7.
[0109] FIG. 6 is a flow diagram illustrating an example process 600 that supports non-real-time suspension indication of CSI-RSs according to one or more aspects. Operations of process 600 may be performed by a base station, such as base station 105 described above with reference to FIGs. 1-3 or a base station as described above with reference to FIG. 7. For example, example operations of process 600 may enable base station 105 to support non-real-time suspension indication of CSI-RSs.
[0110] At block 602, the base station may schedule a plurality of CSI-RSs for a receiver device, such as but not limited to UE 500 and UE 115. For example, CSI-RS scheduling logic 360 may be configured to cause the transmitter 356 of the base station 105 to transmit the schedule of the plurality of CSI-RSs to the UE 115, allowing the UE 115 to identify and / or expect schedules (e.g., start time and end time) of CSI-RSs or CSI-RS scheduling occasions. The UE 115 may then use the one or more CSI-RSs to generate measurements (e.g., via the CSI measurement logic 305 of UE 115) .
[0111] At block 604, the base station may receive, from the receiver device (e.g., of UE 115) , one or more measurements corresponding to one or more of the plurality of CSI-RSs. The measurements may include but are not limited to channel quality information (CQI) of a channel between the UE 115 and the base station 105 for the purpose of determining the correct modulation, code rate, beam forming etc. For example, the UE 115 may generate measurements (e.g., via the CSI measurement logic 305) of a channel intended for set B beams. In some embodiments, the base station may compile or store the measurements as historical data (e.g., in the historical CSI-RS database 363) to be used for subsequent non-real-time suspension indication. Furthermore, the received measurements may be linked to their associated CSI-RS via associated IDs.
[0112] At block 606, the base station may transmit, to the receiver device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS. The indication may be transmitted via MAC-CE / RRC protocol, which avoid or alleviates the downlink overhead typically associated with suspension indications. Furthermore, the indication transmitted via MAC-CE / RRC protocol may include one or more associated identifications, for example of CSI-RSs (e.g., the non-transmitted CSI-RSs) , CSI-RS sets, historical time windows, historical CSI-RS transmission occasions, modules, base stations, and / or cells.
[0113] For example, a cell identifier may refer to an active or inactive ServCell IDs, LTM candidate cell ID, etc. In some embodiments, the cell identifier can also be designed to be able to indicate previously active cell. For example, the previously active cell may have been released from RRC and therefore may no longer be traceable. However, the UE may still be able to identify a suspended CSI-RSs (indicating such suspended CSI-RSs as non-transmitted CSIs) from those previously active cell in a non-real-time manner according to the techniques discussed herein, and allow the UE to remove related measurements (e.g., from the training data 307)
[0114] In some implementations, the base station (e.g., the CSI-RS scheduling logic 360 of base station 105) may identify or signal one or more historical time windows in the indication, such that the CSI-RSs scheduled during such historical time windows can be considered as non-transmitted. In some embodiments, a historical time window can be signaled by referencing the start and end times corresponding to the historical time window. Also or alternatively, the base station may identify or signal the historical time window by referencing an applicable and / or most recent identifier (e.g., system frame, subframe, slot, symbol, etc. ) for the start and end times corresponding to the historical time window. In some embodiments, any CSI-RSs scheduled during the historical time window identified in the indication may be considered as non-transmitted. Alternatively, the base station may further identify, for an identified historical time window, a specific one or more CSI-RSs that are non-transmitted in the indication. The specific one or more non-transmitted CSI-RS may be identified using an identifier, which may be stored in an ID repository (e.g., ID repository 306) or otherwise recognizable to the UE.
[0115] In some implementations, the base station (e.g., the CSI-RS scheduling logic 360 of base station 105) may identify or signal one or more historical CSI-RS transmission occasions in the indication, such that CSI-RSs scheduled during such historical CSI-RS transmission occasions can be considered as non-transmitted. A historical CSI-RS transmission occasion may be distinguishable from a historical time window in the historical CSI-RS transmission occasion may be defined by CSI-RS transmissions whereas a historical time window may be defined by a start and end time (e.g., irrespective of any CSI-RS transmissions occurring within those times) . The base station may identify or signal a historical CSI-RS transmission occasion by referencing an applicable and / or most recent identifier (e.g., system frame, subframe, slot, symbol, etc. ) for the historical CSI-RS transmission occasion. In some embodiments, any CSI-RSs scheduled during the historical CSI-RS transmission occasion identified in the indication may be considered as non-transmitted. Alternatively, the base station may further identify, for an identified historical CSI-RS transmission occasion, a specific one or more CSI-RSs that are non-transmitted in the indication. The specific one or more non-transmitted CSI-RS may be identified using an identifier, which may be stored in an ID repository (e.g., ID repository 306) or otherwise recognizable to the UE.
[0116] In some implementations, the base station may schedule the plurality of CSI-RSs (e.g., at block 602) as part of scheduling one or more CSI-RS resource sets, where each CSI-RS resource set may include one or more CSI-RSs. In such embodiments, one or more identifiers of the CSI-RS resource sets can be indicated, for each time window or transmission occasion. This identification may allow the base station to efficiently indicate (e.g., at block 606) that CSI-RSs comprised by the an identified CSI-RS resource sets are to be considered to be non-transmitted during an associated time window and / or transmission occasion.
[0117] In some implementations, the scheduling of CSI-RS resource sets are indicated as a list of identifiers associated with a cell (e.g., multiple NZP-CSI-RS-ResourceSetIds defined in the CSI-MeasConfig under a corresponding ServCell) , such that the MAC-CE / RRC indicated identifiers of the CSI-RS resource sets may refer to identifications defined in the list. In some embodiments, for example, where only a single CSI-RS resource set is scheduled, one or more identifiers of the CSI-RS resources within the CSI-RS resource set may be indicated, for each time window and / or transmission occasion applicable to the CSI-RS resource set, such that CSI-RSs comprised by the indicated CSI-RS resource sets can be considered to be non-transmitted during the associated time window and / or transmission occasion.
[0118] FIG. 7 is a block diagram of an example base station 700 that supports non-real-time suspension indication of CSI-RSs according to one or more aspects. Base station 700 may be configured to perform operations, including the blocks of process 600 described with reference to FIGs. 3 and 6. In some implementations, base station 700 includes the structure, hardware, and components shown and described with reference to base station 105 of FIGs. 1-3. For example, base station 700 may include controller 240, which operates to execute logic or computer instructions stored in memory 242, as well as controlling the components of base station 700 that provide the features and functionality of base station 700. Base station 700, under control of controller 240, transmits and receives signals via wireless radios 701a-t and antennas 734a-t. Wireless radios 701a-t include various components and hardware, as illustrated in FIG. 2 for base station 105, including modulator and demodulators 232a-t, transmit processor 220, TX MIMO processor 230, MIMO detector 236, and receive processor 238.
[0119] As shown, the memory 242 may include a CSI-RS scheduling logic 360, a non-transmitted CSI-RS indicator logic 361, and a historical CSI-RS database 363. The CSI-RS scheduling logic 360 may be configured to schedule CSI-RSs for the UE 115, for example, by providing start or end times of a CSI-RS transmission occasion or generating the CSI-RS at those times. The non-transmitted CSI-RS indicator logic 361 may be configured to indicate a CSI-RS as being suspended or non-transmitted. For example, the base station 105 may retrieve IDs associated with the suspended CSI-RS, and / or of a historical time window or historical CSI-RS transmission occasion associated with the non-transmitted CSI-RS and transmit such associated identifications to the UE 115. to the historical CSI-RS database 363 may include or be configured to store historical CSI-RS information, such as, but not limited to: the start and end times of historical CSI-RSs or of historical time windows; identifications of historical time windows or CSI-RS transmission occasions; identifications of the modules, cells, base stations, UEs, and / or channels associated with the CSI-RSs; identifications of the CSI-RS sets associated with each CSI-RS; and / or the measurements, characteristics or parameters associated with each CSI-RS. In some aspects, the memory 242 and / or the historical CSI-RS database 363 may further include or may be configured to store an ID repository (e.g., ID repository 364) , which may store one or more of the aforementioned identifications. Base station 700 may receive signals from or transmit signals to one or more UEs, such as UE 115 of FIGs. 1-3 or UE 500 of FIG. 5.
[0120] It is noted that one or more blocks (or operations) described with reference to FIGs. 3, 4, and 6 may be combined with one or more blocks (or operations) described with reference to another of the figures. For example, one or more blocks (or operations) of FIG. 4 may be combined with one or more blocks (or operations) of FIG. 6. As another example, one or more blocks associated with FIG. 3 may be combined with one or more blocks associated with FIGs. 4 or 6. Additionally, or alternatively, one or more operations described above with reference to FIGs. 1-3 may be combined with one or more operations described with reference to FIGs. 5 or 7.
[0121] In one or more aspects, techniques for supporting suspension indication for CSI-RS transmission may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes or devices described elsewhere herein. In a first aspect, supporting suspension indication for CSI-RS transmission may include an apparatus configured to support suspension indication for CSI-RS transmission. The apparatus is further configured to receive, from a transmitter device, a scheduling of a plurality of channel state information reference signals (CSI-RSs) ; transmit, to the transmitter device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and receive, from the transmitter device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS. Additionally, the apparatus may perform or operate according to one or more aspects as described below. In some implementations, the apparatus includes a wireless device, such as a UE. In some implementations, the apparatus may include at least one processor, and a memory coupled to the processor. The processor may be configured to perform operations described herein with respect to the apparatus. In some other implementations, the apparatus may include a non-transitory computer-readable medium having program code recorded thereon and the program code may be executable by a computer for causing the computer to perform operations described herein with reference to the apparatus. In some implementations, the apparatus may include one or more means configured to perform operations described herein. In some implementations, a method of wireless communication may include one or more operations described herein with reference to the apparatus.
[0122] In a second aspect, in combination with the first aspect, the indication is received as a media access control layer control element (MAC-CE) or as a radio resource control (RRC) message.
[0123] In a third aspect, in combination with one or more of the aforementioned aspects, the indication is received as a group common downlink control information (GC-DCI) based on a radio network temporary identifier (RNTI) .
[0124] In a fourth aspect, in combination with one or more of the aforementioned aspects, the indication is received by receiving an identification of at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS.
[0125] In a fifth aspect, in combination with one or more of the aforementioned aspects, the indication is received by receiving an identification of at least one historical time window associated with the at least one non-transmitted CSI-RS.
[0126] In a sixth aspect, in combination with one or more of the aforementioned aspects, a historical time window and / or a historical CSI-RS transmission occasion is identified, wherein the historical time window and / or the historical CSI-RS transmission occasion is identified by indicating a start and end time for the historical time window, and / or by indicating a recent identifier of the historical time window and / or the historical CSI-RS transmission occasion, and / or by indicating a rank of a historical CSI-RS transmission occasion within a ranking of historical CSI-RS transmission occasions from most recent to least recent.
[0127] In a seventh aspect, in combination with one or more of the aforementioned aspects, the indication is received by receiving an identification of at least one historical CSI-RS transmission occasion and / or a historical time window, wherein any CSI-RS scheduled during the historical CSI-RS transmission occasion and / or during the historical time window is considered as non-transmitted CSI-RS, including the at least one non-transmitted CSI-RS.
[0128] In an eighth aspect, in combination with one or more of the aforementioned aspects, the indication is received by receiving an identification associated with the at least one non-transmitted CSI-RS.
[0129] In a ninth aspect, in combination with one or more of the f aforementioned aspects, the receiver device receives the scheduling of the plurality of CSI-RSs by receiving a scheduling of one or more CSI-RS resource sets, wherein each CSI-RS resource set comprises one or more CSI-RSs; wherein the one or more CSI-RS resource sets includes at least a first CSI-RS resource set that includes the non-transmitted CSI-RS
[0130] In a tenth aspect, in combination with one or more of the aforementioned aspects, the CSI-RS resource sets are scheduled based on a list comprised of one or more NZP-CSI-RS-ResourceSetIds defined in the CSI-MeasConfig under corresponding ServCell, such that identifiers of the CSI-RS resource sets indicated using the MAC-CE / RRC protocol are entry-IDs defined in the list.
[0131] In an eleventh aspect, in combination with one or more of the aforementioned aspects, if the receiver device receives a scheduling of a single CSI-RS resource set, the indication includes one or more identifiers of the CSI-RS resources within the CSI-RS resource set for each historical time window and / or each historical CSI-RS transmission occasion associated with the CSI-RS resource set, wherein CSI-RSs associated with the single CSI-RS resource set are indicated as non-transmitted during the associated historical time windows and / or historical CSI-RS transmission occasions.
[0132] In a twelfth aspect, in combination with one or more of the aforementioned aspects, receiving the indication comprises receiving an identifier of the at least one non-transmitted CSI-RS, wherein the identifier is an entry-ID for the at least one non-transmitted CSI-RS defined in an associated CSI-RS resource set of the at least one non-transmitted CSI-RS.
[0133] In a thirteenth aspect, in combination with one or more of the aforementioned aspects, receiving the indication comprises receiving an identifier of the at least one non-transmitted CSI-RS, wherein the identifier identifies a corresponding NZP-CSI-RS- ResourceIds defined in the CSI-MeasConfig under a corresponding ServCell of the non-transmitted CSI-RS.
[0134] In a fourteenth aspect, in combination with one or more of the aforementioned aspects, the indication is received by receiving an identification of the first CSI-RS resource set that includes the non-transmitted CSI-RS.
[0135] In a fifteenth aspect, in combination with one or more of the aforementioned aspects, each CSI-RS of the plurality of CSI-RSs is associated with one of a prediction target for a set A beam or a measurement resource for a set B beam, wherein the receiver device receives the indication by receiving an identification of the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.
[0136] In a sixteenth aspect, in combination with one or more of the aforementioned aspects, the indication is based on at least one associated identification provided by a MAC-CE or by a RRC message.
[0137] In a seventeenth aspect, in combination with one or more of the aforementioned aspects, the indication includes at least one cell identifier corresponding to at least one cell associated with the at least one non-transmitted CSI-RS.
[0138] In an eighteenth aspect, in combination with one or more of the aforementioned aspects, the indication includes a cell identifier of a previously active cell associated with the at least one non-transmitted CSI-RS.
[0139] In a nineteenth aspect, in combination with one or more of the aforementioned aspects, the receiving device is configured to expect a MAC-CE and / or a RRC message.
[0140] In a twentieth aspect, in combination with one or more of the aforementioned aspects, the receiver device is a user equipment (UE) , wherein the transmitter device is a next generation node B (gNB) , wherein the processing system is configured to cause the receiver device to receive the scheduling of the plurality of CSI-RSs persistently or semi-persistently, and not in real-time.
[0141] In a twenty-first aspect, in combination with one or more of the aforementioned aspects, the indication indicates a plurality of candidate CSI-RSs that includes the at least one non-transmitted CSI-RS.
[0142] In a twenty-second aspect, in combination with one or more of the aforementioned aspects, the indication is received via a downlink control information using a K-bit bitmap, wherein each bit of the K-bit bitmap corresponds to a CSI-RS transmission occasion associated with the non-transmitted CSI-RS among a plurality of CSI-RS transmission occasions.
[0143] In a twenty-third aspect, in combination with one or more of the aforementioned aspects, the indication is received with multiple associated identifications for the at least one non-transmitted CSI-RS via a downlink control information (DCI) using a DCI payload, wherein the DCI payload is segmented into multiple sub-fields respectively associated with the multiple associated identifications.
[0144] In a twenty-fourth aspect, in combination with one or more of the aforementioned aspects, the indication identifies at least one cell associated with the at least one non-transmitted CSI-RS, wherein the indication further identifies one or more candidate CSI-RSs associated with each of the at least one cell.
[0145] In a twenty-fifth, in combination with one or more of the aforementioned aspects, the receiver device is configured to expect DCI.
[0146] In one or more aspects, techniques for supporting suspension indication for CSI-RS transmission may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes or devices described elsewhere herein. In a twenty sixth aspect, supporting suspension indication for CSI-RS transmission may include an apparatus configured to schedule a plurality of channel state information reference signals (CSI-RSs) for a receiver device; receive, from the receiver device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; and transmit, to the receiver device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS. Additionally, the apparatus may perform or operate according to one or more aspects as described below. In some implementations, the apparatus includes a wireless device, such as a base station. In some implementations, the apparatus may include at least one processor, and a memory coupled to the processor. The processor may be configured to perform operations described herein with respect to the apparatus. In some other implementations, the apparatus may include a non-transitory computer-readable medium having program code recorded thereon and the program code may be executable by a computer for causing the computer to perform operations described herein with reference to the apparatus. In some implementations, the apparatus may include one or more means configured to perform operations described herein. In some implementations, a method of wireless communication may include one or more operations described herein with reference to the apparatus.
[0147] In a twenty-seventh aspect, in combination with the twenty sixth aspect, the indication is transmitted as a media access control layer control element (MAC-CE) or as a radio resource control (RRC) message.
[0148] In a twenty-eighth, in combination with one or more of the aforementioned aspects, the indication is transmitted as a group common downlink control information (GC-DCI) based on a radio network temporary identifier (RNTI) .
[0149] In a twenty-ninth aspect, in combination with one or more of the aforementioned aspects, the indication is transmitted by transmitting an identification of at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS.
[0150] In a thirtieth aspect, in combination with one or more of the aforementioned aspects, the indication is transmitted by transmitting an identification of at least one historical time window associated with the at least one non-transmitted CSI-RS.
[0151] In a thirty-first aspect, in combination with one or more of the aforementioned aspects, a historical time window and / or a historical CSI-RS transmission occasion is identified, wherein the historical time window and / or the historical CSI-RS transmission occasion is identified by indicating of a start and end time for the historical time window, and / or by indicating a recent identifier of the historical time window and / or the historical CSI-RS transmission occasion, and / or by indicating a rank of a historical CSI-RS transmission occasion within a ranking of historical CSI-RS transmission occasions from most recent to least recent.
[0152] In a thirty-second aspect, in combination with one or more of the aforementioned aspects, the indication is transmitted by transmitting an identification of at least one historical CSI-RS transmission occasion and / or a historical time window, wherein any CSI-RS scheduled during the historical CSI-RS transmission occasion and / or a historical time window is considered as non-transmitted CSI-RS, including the at least one non-transmitted CSI-RS.
[0153] In a thirty-third aspect, in combination with one or more of the aforementioned aspects, the indication is transmitted by transmitting an identification associated with the at least one non-transmitted CSI-RS.
[0154] In a thirty-fourth aspect, in combination with one or more of the aforementioned aspects, the transmitter device schedules the plurality of CSI-RSs by scheduling one or more CSI-RS resource sets, wherein each CSI-RS resource set comprises one or more CSI-RSs; wherein the one or more CSI-RS resource sets includes at least a first CSI-RS resource set that includes the non-transmitted CSI-RS
[0155] In a thirty-fifth aspect, in combination with one or more of the aforementioned aspects, the CSI-RS resource sets are scheduled based on a list comprised of one or more NZP-CSI-RS-ResourceSetIds defined in the CSI-MeasConfig under corresponding ServCell, such that identifiers of the CSI-RS resource sets indicated using the MAC-CE / RRC protocol are entry-IDs defined in the list.
[0156] In a thirty-sixth aspect, in combination with one or more of the aforementioned aspects, if the transmitter device schedules a single CSI-RS resource set, the indication includes one or more identifiers of the CSI-RS resources within the CSI-RS resource set for each historical time window and / or each historical CSI-RS transmission occasion associated with the CSI-RS resource set, wherein CSI-RSs associated with the single CSI-RS resource set are indicated as non-transmitted during the associated historical time windows and / or historical CSI-RS transmission occasions.
[0157] In a thirty-seventh aspect, in combination with one or more of the aforementioned aspects, transmitting the indication comprises transmitting an identifier of the at least one non-transmitted CSI-RS, wherein the identifier is an entry-ID for the at least one non-transmitted CSI-RS defined in an associated CSI-RS resource set of the at least one non-transmitted CSI-RS.
[0158] In a thirty-eighth aspect, in combination with one or more of the aforementioned aspects, transmitting the indication comprises transmitting an identifier of the at least one non-transmitted CSI-RS, wherein the identifier identifies a corresponding NZP-CSI-RS-ResourceIds defined in the CSI-MeasConfig under a corresponding ServCell of the non-transmitted CSI-RS.
[0159] In a thirty-ninth aspect, in combination with one or more of the aforementioned aspects, the indication is transmitted by transmitting an identification of the first CSI-RS resource set that includes the non-transmitted CSI-RS.
[0160] In a fortieth aspect, in combination with one or more of the aforementioned aspects, each CSI-RS of the plurality of CSI-RSs is associated with one of a prediction target for a set A beam or a measurement resource for a set B beam, wherein the transmitter device transmits the indication by transmitting an identification of the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.
[0161] In a forty-first aspect, in combination with one or more of the aforementioned aspects, the indication is based on at least one associated identifications provided by a MAC-CE or by a RRC message.
[0162] In a forty-second aspect, in combination with one or more of the aforementioned aspects, the indication includes one or more cell identifiers corresponding to one or more cells.
[0163] In a forty-third aspect, in combination with one or more of the aforementioned aspects, the indication includes a cell identifier of a previously active cell associated with the at least one non-transmitted CSI-RS.
[0164] In a forty-fourth aspect, in combination with one or more of the aforementioned aspects, the transmitter device is configured to determine whether the receiver device is capable of receiving a MAC-CE and / or a RRC message.
[0165] In a forty-fifth aspect, in combination with one or more of the aforementioned aspects, the transmitter device is a next generation node B (gNB) , wherein the receiver device is a user equipment (UE) , wherein the processing system is configured to cause the transmitter device to schedule of the plurality of CSI-RSs persistently or semi-persistently, and not in real-time.
[0166] In a forty-sixth aspect, in combination with one or more of the aforementioned aspects, the indication indicates a plurality of candidate CSI-RSs that includes the at least one non-transmitted CSI-RS.
[0167] In a forty-seventh aspect, in combination with one or more of the aforementioned aspects, the indication is transmitted via a downlink control information using a K-bit bitmap, wherein each bit of the K-bit bitmap corresponds to a CSI-RS transmission occasion associated with the non-transmitted CSI-RS among a plurality of CSI-RS transmission occasions.
[0168] In a forty-eighth aspect, in combination with one or more of the aforementioned aspects, the indication is transmitted with multiple associated identifications for the at least one non-transmitted CSI-RS via a downlink control information (DCI) using a DCI payload, wherein the DCI payload is segmented into multiple sub-fields respectively associated with the multiple associated identifications.
[0169] In a forty-ninth aspect, in combination with one or more of the aforementioned aspects, the indication identifies at least one cell associated with the at least one non-transmitted CSI-RS, wherein the indication further identifies one or more candidate CSI-RSs associated with each of the at least one cell.
[0170] In a fiftieth, in combination with one or more of the aforementioned aspects, the transmitter device is configured to expect DCI.
[0171] In one or more aspects, techniques for supporting suspension indication for CSI-RS transmission may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes or devices described elsewhere herein. In a fifty-first aspect, supporting suspension indication for CSI-RS transmission may include an apparatus configured to receive, from a next generation node B (gNB) , a persistent or semipersistent (P / SP) scheduling of a plurality of channel state information reference signals (CSI-RSs) ; transmit, to the gNB, one or more measurements corresponding to one or more of the plurality of CSI-RSs; receive, from the gNB and in non-real-time, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS, and at least one associated identification; and train, based on the indication, a machine learning model to predict a second plurality of measurements corresponding to a second plurality of CSI-RSs. Additionally, the apparatus may perform or operate according to one or more aspects as described below. In some implementations, the apparatus includes a user equipment. In some implementations, the apparatus may include at least one processor, and a memory coupled to the processor. The processor may be configured to perform operations described herein with respect to the apparatus. In some other implementations, the apparatus may include a non-transitory computer-readable medium having program code recorded thereon and the program code may be executable by a computer for causing the computer to perform operations described herein with reference to the apparatus. In some implementations, the apparatus may include one or more means configured to perform operations described herein. In some implementations, a method of wireless communication may include one or more operations described herein with reference to the apparatus.
[0172] In a fifty-second aspect, in combination with the fifty-first aspect, the indication is received as a media access control layer control element (MAC-CE) or as a radio resource control (RRC) message.
[0173] In a fifty-third, in combination with one or more of the aforementioned aspects, the indication is received as a group common downlink control information (GC-DCI) based on a radio network temporary identifier (RNTI) .
[0174] In a fifty-fourth aspect, in combination with one or more of the aforementioned aspects, the indication is received by receiving an identification of at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS.
[0175] In a fifty-fifth aspect, in combination with one or more of the aforementioned aspects, the indication is received by receiving an identification of the at least one non-transmitted CSI-RS.
[0176] In a fifty-sixth aspect, in combination with one or more of the aforementioned aspects, the scheduling is received by receiving a scheduling of one or more CSI-RS resource sets, wherein each CSI-RS resource set comprises one or more CSI-RSs; wherein the one or more CSI-RS resource sets includes at least a first CSI-RS resource set that includes the non-transmitted CSI-RS; wherein the at least one associated identification identifies the first CSI-RS resource set that includes the non-transmitted CSI-RS.
[0177] In a fifty-seventh aspect, in combination with one or more of the aforementioned aspects, each CSI-RS of the plurality of CSI-RSs is associated with one of a prediction target for a set A beam or a measurement resource for a set B beam, wherein the at least one associated identification identifies the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.
[0178] Those of skill in the art would understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0179] Components, the functional blocks, and the modules described herein with respect to FIGs. 1-7 include processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, among other examples, or any combination thereof. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, application, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise. In addition, features discussed herein may be implemented via specialized processor circuitry, via executable instructions, or combinations thereof.
[0180] Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure. Skilled artisans will also readily recognize that the order or combination of components, methods, or interactions that are described herein are merely examples and that the components, methods, or interactions of the various aspects of the present disclosure may be combined or performed in ways other than those illustrated and described herein.
[0181] The various illustrative logics, logical blocks, modules, circuits and algorithm processes described in connection with the implementations disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. The interchangeability of hardware and software has been described generally, in terms of functionality, and illustrated in the various illustrative components, blocks, modules, circuits and processes described above. Whether such functionality is implemented in hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0182] The hardware and data processing apparatus used to implement the various illustrative logics, logical blocks, modules and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose single-or multi-chip processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, or, any conventional processor, controller, microcontroller, or state machine. In some implementations, a processor may be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. In some implementations, particular processes and methods may be performed by circuitry that is specific to a given function.
[0183] In one or more aspects, the functions described may be implemented in hardware, digital electronic circuitry, computer software, firmware, including the structures disclosed in this specification and their structural equivalents thereof, or in any combination thereof. Implementations of the subject matter described in this specification also may be implemented as one or more computer programs, that is one or more modules of computer program instructions, encoded on a computer storage media for execution by, or to control the operation of, data processing apparatus.
[0184] If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. The processes of a method or algorithm disclosed herein may be implemented in a processor-executable software module which may reside on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that may be enabled to transfer a computer program from one place to another. A storage media may be any available media that may be accessed by a computer. By way of example, and not limitation, such computer-readable media may include random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable read-only memory (EEPROM) , CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that may be used to store desired program code in the form of instructions or data structures and that may be accessed by a computer. Also, any connection may be properly termed a computer-readable medium. Disk and disc, as used herein, includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media. Additionally, the operations of a method or algorithm may reside as one or any combination or set of codes and instructions on a machine readable medium and computer-readable medium, which may be incorporated into a computer program product.
[0185] Various modifications to the implementations described in this disclosure may be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to some other implementations without departing from the spirit or scope of this disclosure. Thus, the claims are not intended to be limited to the implementations shown herein, but are to be accorded the widest scope consistent with this disclosure, the principles and the novel features disclosed herein.
[0186] Additionally, a person having ordinary skill in the art will readily appreciate, the terms “upper” and “lower” are sometimes used for ease of describing the figures, and indicate relative positions corresponding to the orientation of the figure on a properly oriented page, and may not reflect the proper orientation of any device as implemented.
[0187] Certain features that are described in this specification in the context of separate implementations also may be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation also may be implemented in multiple implementations separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination may in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
[0188] Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Further, the drawings may schematically depict one more example processes in the form of a flow diagram. However, other operations that are not depicted may be incorporated in the example processes that are schematically illustrated. For example, one or more additional operations may be performed before, after, simultaneously, or between any of the illustrated operations. In certain circumstances, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the implementations described above should not be understood as requiring such separation in all implementations, and it should be understood that the described program components and systems may generally be integrated together in a single software product or packaged into multiple software products. Additionally, some other implementations are within the scope of the following claims. In some cases, the actions recited in the claims may be performed in a different order and still achieve desirable results.
[0189] As used herein, including in the claims, the term “or, ” when used in a list of two or more items, means that any one of the listed items may be employed by itself, or any combination of two or more of the listed items may be employed. For example, if a composition is described as containing components A, B, or C, the composition may contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination. Also, as used herein, including in the claims, “or” as used in a list of items prefaced by “at least one of” indicates a disjunctive list such that, for example, a list of “at least one of A, B, or C” means A or B or C or AB or AC or BC or ABC (that is A and B and C) or any of these in any combination thereof. The term “substantially” is defined as largely but not necessarily wholly what is specified (and includes what is specified; for example, substantially 90 degrees includes 90 degrees and substantially parallel includes parallel) , as understood by a person of ordinary skill in the art. In any disclosed implementations, the term “substantially” may be substituted with “within [a percentage] of” what is specified, where the percentage includes . 1, 1, 5, or 10 percent.
[0190] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
A receiver device, comprising:a processing system that includes processor circuitry and memory circuitry that stores code, the processing system configured to cause the receiver device to:receive, from a transmitter device, a scheduling of a plurality of channel state information reference signals (CSI-RSs) ;transmit, to the transmitter device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; andreceive, from the transmitter device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS.The receiver device of claim 1, wherein the processing system is configured to cause the receiver device to receive the indication as a media access control layer control element (MAC-CE) or as a radio resource control message.The receiver device of claim 1, wherein the processing system is configured to cause the receiver device to receive the indication as a group common downlink control information (GC-DCI) based on a radio network temporary identifier (RNTI) .The receiver device of claim 1, wherein the processing system is configured to cause the receiver device to receive the indication by receiving an identification of at least one historical CSI-RS transmission occasion associated with the non-transmitted CSI-RS.The receiver device of claim 1, wherein the processing system is configured to cause the receiver device to receive the indication by receiving an identification associated with the non-transmitted CSI-RS.The receiver device of claim 1,wherein the processing system is configured to cause the receiver device to receive the scheduling of the plurality of CSI-RSs by receiving a scheduling of one or more CSI-RS resource sets, wherein each CSI-RS resource set comprises one or more CSI-RSs;wherein the one or more CSI-RS resource sets includes at least a first CSI-RS resource set that includes the non-transmitted CSI-RS;wherein the processing system is configured to cause the receiver device to receive the indication by receiving an identification of the first CSI-RS resource set that includes the non-transmitted CSI-RS.The receiver device of claim 1, wherein each CSI-RS of the plurality of CSI-RSs is associated with one of a prediction target for a set A beam or a measurement resource for a set B beam, wherein the processing system is configured to cause the receiver device to receive the indication by receiving an identification of the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.The receiver device of claim 1, wherein the receiver device is a user equipment (UE) , wherein the transmitter device is a next generation node B (gNB) , wherein the processing system is configured to cause the receiver device to receive the scheduling of the plurality of CSI-RSs persistently or semi-persistently, and not in real-time.A user equipment (UE) , comprising:a processing system that includes processor circuitry and memory circuitry that stores code, the processing system configured to cause the UE to:receive, from a next generation node B (gNB) , a scheduling of a plurality of channel state information reference signals (CSI-RSs) ;transmit, to the gNB, one or more measurements corresponding to one or more of the plurality of CSI-RSs;receive, from the gNB, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS, and at least one associated identification; andtrain, based on the indication, a machine learning model to predict a second plurality of measurements corresponding to a second plurality of CSI-RSs.The UE of claim 9, wherein the processing system is configured to cause the UE to receive the indication as a media access control layer control element (MAC-CE) or as a radio resource control message.The UE of claim 9, wherein the processing system is configured to cause the UE to receive the indication as a group common downlink control information (GC-DCI) based on a radio network temporary identifier (RNTI) .The UE of claim 9, wherein the at least one associated identification identifies at least one historical CSI-RS transmission occasion associated with the at least one non-transmitted CSI-RS.The UE of claim 9, wherein the at least one associated identification identifies the at least one non-transmitted CSI-RS.The UE of claim 9,wherein the processing system is configured to cause the UE to receive the scheduling of the plurality of CSI-RSs by receiving a scheduling of one or more CSI-RS resource sets, wherein each CSI-RS resource set comprises one or more CSI-RSs;wherein the one or more CSI-RS resource sets includes at least a first CSI-RS resource set that includes the non-transmitted CSI-RS;wherein the at least one associated identification identifies the first CSI-RS resource set that includes the non-transmitted CSI-RS.The UE of claim 9, wherein each CSI-RS of the plurality of CSI-RSs is associated with one of a prediction target for a set A beam or a measurement resource for a set B beam, wherein the at least one associated identification identifies the non-transmitted CSI-RS as being associated with one of the prediction target for the set A beam or the measurement resource for the set B beam.A method for wireless communication by a receiver device, comprising:receiving, from a transmitter device, a scheduling of a plurality of channel state information reference signals (CSI-RSs) ;transmitting, to the transmitter device, one or more measurements corresponding to one or more of the plurality of CSI-RSs; andreceiving, from the transmitter device, an indication of at least one CSI-RS of the plurality of CSI-RSs as a non-transmitted CSI-RS.The method of claim 16, wherein the indication is received as a media access control layer control element (MAC-CE) or as a radio resource control (RRC) message.The method of claim 16, wherein receiving the indication comprises:receiving the indication as a group common downlink control information (GC-DCI) based on a radio network temporary identifier (RNTI) .The method of claim 16, wherein receiving the indication comprises receiving an identification of at least one historical CSI-RS transmission occasion associated with the non-transmitted CSI-RS.The method of claim 16, wherein receiving the indication comprises receiving an identification associated with the non-transmitted CSI-RS.
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