CN117044136A - Dynamic triggering and skipping of Channel State Feedback (CSF) - Google Patents

Abstract

Certain aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for dynamically triggering or skipping Channel State Feedback (CSF). A method that may be performed by a User Equipment (UE) includes: receiving a configuration from a network entity indicating a CSF reporting opportunity; receiving a Downlink (DL) transmission; and when one or more trigger conditions are met, transmitting CSF only on some CSF reporting opportunities after receiving DL transmissions. According to certain aspects, the UE skips at least some CSF reporting opportunities when one or more trigger conditions are not met.

Description

Dynamic triggering and skipping of Channel State Feedback (CSF)

Cross Reference to Related Applications

The present application claims priority from U.S. application Ser. No.17/697,407, filed on 3/17/2022, which claims priority from U.S. provisional application Ser. No.63/169,742, filed on 4/1/2021, both of which are hereby assigned to the assignee of the present application and are hereby expressly incorporated by reference in their entirety as if fully set forth below and for all applicable purposes.

Technical Field

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for dynamically triggering or skipping transmission of Channel State Feedback (CSF).

Background

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, and so on. These wireless communication systems may employ multiple-access techniques capable of supporting communication with multiple users by sharing the available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include 3 rd generation partnership project (3 GPP) Long Term Evolution (LTE) systems, LTE-A advanced systems, code Division Multiple Access (CDMA) systems, time Division Multiple Access (TDMA) systems, frequency Division Multiple Access (FDMA) systems, orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few.

In some examples, a wireless multiple-access communication system may include multiple Base Stations (BSs) each capable of supporting communication for multiple communication devices (otherwise referred to as User Equipment (UE)) simultaneously. In an LTE or LTE-a network, a set of one or more base stations may define an evolved node B (eNB). In other examples (e.g., in a next generation, new Radio (NR), or 5G network), a wireless multiple access communication system may include a plurality of Distributed Units (DUs) (e.g., edge Units (EUs), edge Nodes (ENs), radio Heads (RH), smart Radio Heads (SRHs), transmitting Receiving Points (TRPs), etc.) in communication with a plurality of Central Units (CUs) (e.g., central Nodes (CNs), access Node Controllers (ANCs), etc.), wherein a set of one or more DUs in communication with a CU may define an access node (e.g., which may be referred to as a BS, 5G NB, next generation node B (gNB or gndeb), TRP, etc.). The BS or DU may communicate with the set of UEs on a Downlink (DL) channel (e.g., for transmission from the BS to the UE) and an Uplink (UL) channel (e.g., for transmission from the UE to the BS or DU).

These multiple access techniques have been employed in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the urban, national, regional, and even global levels. New Radios (NRs) (e.g., 5G) are examples of emerging telecommunication standards. NR is a set of enhancements to the LTE mobile standard promulgated by 3 GPP. It is designed to better support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with Cyclic Prefix (CP) on DL and UL. To this end, NR supports beamforming, multiple Input Multiple Output (MIMO) antenna technology, and carrier aggregation.

As the demand for mobile broadband access continues to increase, further improvements in NR and LTE technologies are needed. These improvements should be applicable to other multiple access techniques and telecommunication standards employing these techniques.

Disclosure of Invention

The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed by the claims which follow, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "detailed description" one will understand how the features of this disclosure provide advantages that include improved communications between access points and stations in a wireless network.

One or more aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a User Equipment (UE). The method generally includes: receiving a configuration from a network entity indicating a Channel State Feedback (CSF) reporting opportunity; receiving a Downlink (DL) transmission; and when one or more trigger conditions are met, transmitting CSF only on some CSF reporting opportunities after receiving DL transmissions.

One or more aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a network entity. The method generally includes: transmitting a configuration indicating a CSF report opportunity to the UE; transmitting DL transmissions to the UE; and when one or more trigger conditions are met, receiving CSF from the UE only on some CSF reporting opportunities after sending the DL transmission.

One or more aspects of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication by a UE. The apparatus generally includes a memory and at least one processor coupled with the memory. The at least one processor coupled with the memory is generally configured to: receiving a configuration from a network entity indicating a CSF reporting opportunity; receiving DL transmissions; and when one or more trigger conditions are met, transmitting CSF only on some CSF reporting opportunities after receiving DL transmissions.

One or more aspects of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication by a network entity. The apparatus generally includes a memory and at least one processor coupled with the memory. The at least one processor coupled with the memory is generally configured to: transmitting a configuration indicating a CSF report opportunity to the UE; transmitting DL transmissions to the UE; and when one or more trigger conditions are met, receiving CSF from the UE only on some CSF reporting opportunities after sending the DL transmission.

One or more aspects of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes: and means for receiving signaling indicating the beam update. The apparatus generally includes means for receiving a configuration from a network entity indicating a CSF reporting opportunity; means for receiving DL transmissions; and means for transmitting CSF only on some CSF reporting opportunities after receiving the DL transmission when one or more trigger conditions are met.

One or more aspects of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes: means for sending a configuration to the UE indicating a CSF reporting opportunity; means for sending DL transmissions to the UE; and means for receiving CSF from the UE only on some CSF reporting opportunities after sending the DL transmission when one or more trigger conditions are met.

One or more aspects of the subject matter described in this disclosure can be implemented in a computer-readable medium having computer-executable code stored thereon. The computer-readable medium having computer-executable code stored thereon generally comprises: code for receiving a configuration from a network entity indicating a CSF reporting opportunity; code for receiving DL transmissions; and code for transmitting CSF only on some CSF reporting opportunities after receiving the DL transmission when one or more trigger conditions are met.

One or more aspects of the subject matter described in this disclosure can be implemented in a computer-readable medium having computer-executable code stored thereon. The computer-readable medium having computer-executable code stored thereon generally comprises: code for sending a configuration to the UE indicating a CSF reporting opportunity; code for sending DL transmissions to the UE; and code for receiving CSF from the UE only on some CSF reporting opportunities after sending the DL transmission when one or more trigger conditions are met.

To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.

Drawings

So that the manner in which the above recited features of the present disclosure can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the drawings illustrate only certain aspects of the disclosure and that the description may allow for other equivalent aspects.

Fig. 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

Fig. 2 is a block diagram conceptually illustrating a design of an example Base Station (BS) and User Equipment (UE) in accordance with certain aspects of the present disclosure.

Fig. 3 illustrates an example of a frame format for a New Radio (NR) system in accordance with certain aspects of the present disclosure.

Fig. 4 is a flowchart illustrating example operations for wireless communication by a UE in accordance with certain aspects of the present disclosure.

Fig. 5 is a flowchart illustrating example operations for wireless communication by a network entity in accordance with certain aspects of the present disclosure.

Fig. 6 illustrates an example dynamic trigger of Channel State Feedback (CSF) in accordance with certain aspects of the present disclosure.

Fig. 7 illustrates an example timeline for transmitting CSF on only some CSF reporting opportunities after a UE receives a Downlink (DL) transmission, in accordance with certain aspects of the present disclosure.

Fig. 8A and 8B illustrate other example timelines for transmitting CSF on only some CSF reporting opportunities after a UE receives a DL transmission, in accordance with certain aspects of the present disclosure.

Fig. 9 illustrates another example timeline for transmitting CSF on only some CSF reporting opportunities after a UE receives a DL transmission, in accordance with certain aspects of the present disclosure.

Fig. 10 illustrates an example timeline for transmitting CSF on only some CSF reporting opportunities after a UE receives multiple DL transmissions, in accordance with certain aspects of the present disclosure.

Fig. 11 illustrates a communication device that can include various components configured to perform operations for the techniques disclosed herein, in accordance with aspects of the present disclosure.

Fig. 12 illustrates a communication device that can include various components configured to perform operations for the techniques disclosed herein, in accordance with aspects of the present disclosure.

To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized on other aspects without specific recitation.

Detailed Description

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for dynamically triggering or skipping transmission of Channel State Feedback (CSF) on periodic channel state information (P-CSI) or semi-persistent CSI (SP-CSI) reporting opportunities. The techniques presented herein may help save power and efficiently use resources by: where CSF is not necessary, CSF is sent only in some reporting opportunities, such as Channel State Information (CSI) reporting, and transmission is skipped in other reporting opportunities. The techniques presented herein may also help a network entity (e.g., a Base Station (BS)/gNB) to know when to expect CSF reporting.

The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, replace, or add various procedures or components as appropriate. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method practiced using any number of the aspects set forth herein. In addition, the scope of the present disclosure is intended to cover such an apparatus or method that is practiced using other structure, functionality, or structure and functionality in addition to or instead of the aspects of the present disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration. Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects.

The techniques described herein may be used for various wireless communication techniques such as Long Term Evolution (LTE), code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other networks. The terms "network" and "system" are generally used interchangeably. A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variations of CDMA. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. TDMA networks may implement radio technologies such as global system for mobile communications (GSM). OFDMA networks may implement radio technologies such as New Radio (NR) (e.g., 5G RA), evolved UTRA (E-UTRA), ultra Mobile Broadband (UMB), institute of Electrical and Electronics Engineers (IEEE) 802.11 (WiFi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDMA, and so forth. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS).

NR is an emerging wireless communication technology being developed in conjunction with the 5G technology forum (5 GTF). 3GPP LTE and LTE-advanced (LTE-A) are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-a and GSM are described in the literature from the organization named "3 rd generation partnership project" (3 GPP), and CDMA2000 and UMB are described in the literature from the organization named "3 rd generation partnership project 2" (3 GPP 2). The techniques described herein may be used for the wireless networks and radio technologies mentioned above and other wireless networks and radio technologies. For clarity, while aspects may be described herein using terms commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure may be applied to other generation-based communication systems including NR technologies, such as 5G and beyond.

NR access (e.g., 5G technology) may support various wireless communication services such as enhanced mobile broadband (emmbb) targeting wide bandwidths (e.g., 80MHz or higher), millimeter wave (mmW) targeting high carrier frequencies (e.g., 25GHz or higher), large-scale machine type communication MTC (mctc) targeting non-backward compatible MTC technology, and/or critical tasks targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different Transmission Time Intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services may coexist in the same subframe.

Example Wireless communication System

Fig. 1 illustrates an example wireless communication network 100 (e.g., a New Radio (NR)/5G network) in which aspects of the present disclosure may be implemented. For example, the wireless communication network 100 may include a User Equipment (UE) 120 configured to perform the operation 400 of fig. 4 to send Channel State Feedback (CSF) to a network entity (e.g., such as the Base Station (BS) 110 a) (perform operation 500 of fig. 5). For example, UE 120a includes CSF manager 122 and BS110a includes CSF manager 112. According to certain aspects of the present disclosure, CSF manager 122 may be configured to: when one or more trigger conditions are met, CSF is sent only on some CSF reporting opportunities after receiving a Downlink (DL) transmission. Furthermore, CSF 112 may be configured to: when one or more trigger conditions are met, CSF is received only at some CSF reporting opportunities after DL transmissions are sent.

As shown in fig. 1, a wireless communication network 100 may include a plurality of BSs 110 and other network entities. The BS may be a station in communication with the UE. Each BS110 may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to a coverage area of a NodeB (NB) and/or a NodeB subsystem serving the coverage area, depending on the context in which the term is used. In an NR system, the terms "cell" and next generation node B (gNB), NR BS, 5G NB, access Point (AP) or transmission-reception point (TRP) may be interchangeable. In some examples, the cells may not necessarily be stationary, and the geographic area of the cells may move according to the location of the mobile BS. In some examples, the base stations may be interconnected with each other and/or to one or more other base stations or network nodes (not shown) in the wireless communication network 100 through various types of backhaul interfaces (such as direct physical connections, wireless connections, virtual networks, etc.) using any suitable transmission network.

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular Radio Access Technology (RAT) and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, an air interface, etc. Frequencies may also be referred to as carriers, subcarriers, frequency channels, tones, subbands, and so forth. In a given geographic region, each frequency may support a single RAT to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

The BS may provide communication coverage for macro cells, pico cells, femto cells, and/or other types of cells. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. The pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., home) and may allow limited access to UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG), UEs of users in the home, etc.). The BS for the macro cell may be referred to as a macro BS. The BS for the pico cell may be referred to as a pico BS. The BS for the femto cell may be referred to as a femto BS or a home BS. In the example shown in fig. 1, BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS110x may be a pico BS for pico cell 102 x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. The BS may support one or more (e.g., three) cells.

The wireless communication network 100 may also include relay stations. A relay station is a station that receives a transmission of data and/or other information from an upstream station (e.g., a BS or UE) and sends a transmission of data and/or other information to a downstream station (e.g., a UE or BS). The relay station may also be a UE that relays transmissions for other UEs. In the example shown in fig. 1, relay 110r may communicate with BS110a and UE 120r to facilitate communications between BS110a and UE 120 r. A relay station may also be referred to as a relay BS, relay, or the like.

The wireless communication network 100 may be a heterogeneous network including different types of BSs (e.g., macro BS, pico BS, femto BS, relay, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless communication network 100. For example, a macro BS may have a high transmit power level (e.g., 20 watts), while a pico BS, femto BS, and relay may have a lower transmit power level (e.g., 1 watt).

The wireless communication network 100 may support synchronous or asynchronous operation. For synchronous operation, BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time. For asynchronous operation, BSs may have different frame timings, and transmissions from different BSs may not be aligned in time. The techniques described herein may be used for both synchronous and asynchronous operation.

The network controller 130 may be coupled to a set of BSs and provide coordination and control for the BSs. Network controller 130 may communicate with BS110 via a backhaul. BS110 may also communicate with each other via a wireless or wired backhaul (e.g., directly or indirectly).

UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout wireless communication network 100, and each UE 120 may be fixed or mobile. The UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer Premises Equipment (CPE), cellular telephone, smart phone, personal Digital Assistant (PDA), wireless modem, wireless communication device, handheld device, laptop, cordless telephone, wireless Local Loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or equipment, biometric sensor/device, wearable device (such as a smartwatch, smart garment, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.), entertainment device (e.g., music device, video device, satellite radio, etc.), vehicle component or sensor, smart meter/sensor, industrial manufacturing device, global positioning system device, game device, reality augmentation device (augmented reality (AR), augmented reality (XR) or Virtual Reality (VR)), or any other suitable device configured to communicate via a wireless or wired medium.

Some UEs may be considered Machine Type Communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include: for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, a location tag, etc., which may communicate with a BS, another device (e.g., a remote device), or some other entity. The wireless node may provide a connection, for example, for a network (e.g., a wide area network such as the internet or a cellular network) or to a network via a wired or wireless communication link. Some UEs may be considered internet of things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

Some wireless networks (e.g., LTE) utilize Orthogonal Frequency Division Multiplexing (OFDM) on DL and single carrier frequency division multiplexing (SC-FDM) on Uplink (UL). OFDM and SC-FDM divide the system bandwidth into a plurality of (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier may be modulated with data. Typically, modulation symbols are transmitted in the frequency domain with OFDM and in the time domain with SC-FDM. The interval between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may depend on the system bandwidth. For example, the spacing of the subcarriers may be 15 kilohertz (kHz), and the minimum resource allocation, referred to as a "resource block" (RB), may be 12 subcarriers (or 180 kHz). Thus, the nominal Fast Fourier Transform (FFT) size may be equal to 128, 256, 512, 1024 or 2048 for a system bandwidth of 1.25, 2.5, 5, 10 or 20 megahertz (MHz), respectively. The system bandwidth may also be divided into sub-bands. For example, a subband may cover 1.8MHz (i.e., 6 RBs), and there may be 1, 2, 4, 8, or 16 subbands for a system bandwidth of 1.25, 2.5, 5, 10, or 20MHz, respectively.

While aspects of the examples described herein may be associated with LTE technology, aspects of the disclosure may be applicable to other wireless communication systems, such as NR. NR may utilize OFDM with Cyclic Prefix (CP) on UL and DL and include support for half-duplex operation using Time Division Duplex (TDD). Beamforming may be supported and beam directions may be dynamically configured. Multiple-input multiple-output (MIMO) transmission with precoding may also be supported. MIMO configuration in DL may support up to 8 transmit antennas, with multi-layer DL transmitting up to 8 streams and up to 2 streams per UE. Multi-layer transmission of up to 2 streams per UE may be supported. Aggregation of multiple cells with up to 8 serving cells may be supported.

In some scenarios, air interface access may be scheduled. For example, a scheduling entity (e.g., BS, node B, eNB, gNB, etc.) may allocate resources for communication among some or all devices and apparatuses within its service area or cell. The scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, subordinate entities may utilize resources allocated by one or more scheduling entities.

The BS is not the only entity that can be used as a scheduling entity. In some examples, a UE may serve as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs) and the other UEs may communicate wirelessly using the resources scheduled by the UE. In some examples, a UE may be used as a scheduling entity in a peer-to-peer (P2P) network and/or a mesh network. In a mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

Returning to fig. 1, this figure illustrates various potential deployments for various deployment scenarios. For example, in fig. 1, a solid line with double arrows indicates a desired transmission between a UE and a serving BS, which is a BS designated to serve the UE on the Downlink (DL) and/or Uplink (UL). The thin dashed line with double arrows indicates interfering transmissions between the UE and the BS. Other lines show component-to-component (e.g., UE-to-UE) communication options.

Fig. 2 illustrates example components of BS110 and UE 120 (as shown in fig. 1) that may be used to implement aspects of the present disclosure. For example, antenna 252, processors 266, 258, 264, and/or controller/processor 280 (which includes CSF manager 122) of UE 120 may be used to perform operation 400 of fig. 4, while antenna 234, processors 220, 230, 238, and/or controller/processor 240 (which includes CSF manager 112) of BS110 may be used to perform operation 500 of fig. 5.

At BS110, transmit processor 220 may receive data from data source 212 and control information from controller/processor 240. The control information may be for a Physical Broadcast Channel (PBCH), a Physical Control Format Indicator Channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a Physical Downlink Control Channel (PDCCH), group common PDCCH (GC PDCCH), and so on. The data may be for a Physical Downlink Shared Channel (PDSCH) or the like. Processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. The processor 220 may also generate reference symbols, e.g., for a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a cell-specific reference signal (CRS). A Transmit (TX) MIMO processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to Modulators (MODs) in the transceivers 232a-232 t. Each modulator in transceivers 232a-232t may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal. DL signals from modulators in transceivers 232a-232t may be transmitted via antennas 234a-234t, respectively.

At UE 120, antennas 252a-252r may receive the DL signals from BS110 and may provide the received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator in transceivers 254a-254r may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 may obtain received symbols from all demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information to a controller/processor 280.

On the UL, at UE 120, transmit processor 264 may receive and process data from data source 262 (e.g., for a Physical Uplink Shared Channel (PUSCH)) and control information from controller/processor 280 (e.g., for a Physical Uplink Control Channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., for Sounding Reference Signals (SRS)). The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the demodulators in transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to BS110. At BS110, UL signals from UE 120 may be received by antennas 234, processed by modulators in transceivers 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 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to a controller/processor 240.

Controllers/processors 240 and 280 may direct the operation at BS110 and UE 120, respectively. Processor 240 and/or other processors and modules at BS110 may perform or direct the execution of processes for the techniques described herein. Memories 242 and 282 may store data and program codes for BS110 and UE 120, respectively. The scheduler 244 may schedule UEs for data transmission on DL and/or UL.

Fig. 3 illustrates an example of a frame format 300 for a New Radio (NR) system in accordance with certain aspects of the present disclosure. The transmission timeline for each of DL and UL may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 ms) and may be divided into 10 subframes having indexes of 0 to 9, each subframe being 1ms. Each subframe may include a variable number of slots depending on a subcarrier spacing (SCS). Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the subcarrier spacing. An index may be assigned for the symbol period in each slot. A minislot is a subslot structure (e.g., 2, 3, or 4 symbols).

Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction of each subframe may be dynamically switched. The link direction may be based on slot format. Each slot may include DL/UL data and DL/UL control information.

In NR, a Synchronization Signal Block (SSB) is transmitted. In certain aspects, SSBs may be transmitted in bursts, where each SSB in a burst corresponds to a different beam direction for beam management (e.g., including beam selection and/or beam refinement) at the UE side. SSB includes PSS, SSS and two symbol PBCH. SSBs may be transmitted in fixed slot positions, such as symbols 0-3 as shown in fig. 3. PSS and SSS may be used by UEs for cell search and acquisition. The PSS may provide half frame timing and the SS may provide CP length and frame timing. PSS and SSS may provide cell identity. The PBCH carries some basic system information such as DL system bandwidth, timing information within a radio frame, synchronization Signal (SS) burst set period, system frame number, etc. SSBs may be organized into SS bursts to support beam sweep. Further system information, such as Remaining Minimum System Information (RMSI), system Information Blocks (SIBs), other System Information (OSI), etc., may be transmitted on PDSCH in some subframes. SSBs may be sent up to 64 times, e.g., with up to 64 different beam directions for mmWave. This multiple transmission of SSBs is referred to as an SS burst set. SSBs in one SS burst set may be transmitted in the same frequency region, while SSBs in different SS burst sets may be transmitted at different frequency regions.

A set of control resources (CORESET) for systems such as NR and LTE systems may include one or more sets of control resources (e.g., time and frequency resources) configured to transmit PDCCHs within a system bandwidth. Within each CORESET, one or more search spaces (e.g., common Search Spaces (CSSs), UE-specific search spaces (USSs), etc.) may be defined for a given UE. In accordance with aspects of the present disclosure, CORESET is a set of time and frequency domain resources defined in units of Resource Element Groups (REGs). Each REG may include a fixed number (e.g., twelve) of tones in one symbol period (e.g., the symbol period of a slot), with one tone in one symbol period being referred to as a Resource Element (RE). A fixed number of REGs may be included in a Control Channel Element (CCE). A set of CCEs may be used to transmit a new radio PDCCH (NR-PDCCH), where different numbers of CCEs in the set are used to transmit NR-PDCCHs using different aggregation levels. The plurality of CCE sets may be defined as a search space for the UE, and thus the NodeB or other base station may transmit the NR-PDCCH to the UE by transmitting the NR-PDCCH among the CCE sets defined as decoding candidates within the search space for the UE, and the UE may receive the NR-PDCCH by searching and decoding the NR-PDCCH transmitted by the NodeB in the search space for the UE.

Example dynamic triggering and skipping of Channel State Feedback (CSF)

Certain aspects of the present disclosure provide techniques for dynamically triggering or skipping Channel State Feedback (CSF). These techniques may help conserve resources by sending Channel State Information (CSI) reports only in some reporting opportunities and skipping transmission in other reporting opportunities (e.g., when CSF may be "stale" in a scenario with rapidly changing channel conditions).

New Radio (NR) 3GPP releases 15 and 16 support two CSI reporting mechanisms: periodic CSI (P-CSI) reports transmitted on a Physical Uplink Control Channel (PUCCH) and semi-persistent CSI (SP-CSI) reports transmitted on PUCCH. The P-CSI report is used to periodically report channel quality of a Downlink (DL) channel at the UE. Parameters such as period and subframe offset are configured by the serving cell using higher layer signaling (e.g., radio Resource Control (RRC) signaling). Similar to the P-CSI report, the SP-CSI report has a periodicity and subframe offset configurable by the serving cell. However, dynamic triggers may be used to signal to the UE to start reporting CSI periodically. In some cases, dynamic triggering may also be used to signal to the UE to stop SP transmission of CSI reports. For example, a Medium Access Control (MAC) Control Element (CE) may be used as a dynamic trigger to activate/deactivate SP-CSI reporting opportunities.

NR 3GPP release 17 supports various wireless communication services such as ultra-reliable low latency communication (URLLC). URLLC generally refers to a feature set that provides low latency and ultra-high reliability for mission critical applications such as industrial internet, smart grid, tele-surgery, and smart transportation systems. Thus, aperiodic CSI (a-CSI) reporting has been considered for NR 3GPP release 17, considering the low latency and reliability requirements of URLLC. This type of CSI reporting involves a one-time CSI reporting of the UE, which is dynamically triggered by the network entity, e.g. by Downlink Control Information (DCI) in a Physical Downlink Control Channel (PDCCH). Some parameters related to the configuration of aperiodic CSI reports are semi-statically configured from the network entity to the UE, but the trigger is dynamic. While a-CSI reporting is advantageous because it has low latency (e.g., faster) and it only needs to be triggered when DL data/communications are present, a-CSI reporting also has its drawbacks. For example, an a-CSI report may increase overhead due to DCI (i.e., DL grant is required to trigger an a-CSI report on PUCCH), and in some cases, a complex procedure needs to be defined over an existing CSI report.

Aspects of the present disclosure provide techniques that may help clarify triggering and skipping CSI reporting when CSF reporting opportunities include P-CSI or SP-CSI reporting opportunities. Thus, these techniques may help the UE save power and use resources efficiently. These techniques may also help the BS (e.g., the gNB) know when to expect CSF reporting.

According to certain aspects, when using the P/SP-CSI reporting resource, the UE may transmit the P/SP-CSI report only when the UE receives DL grant via PDCCH or DL data via a Physical Downlink Shared Channel (PDSCH) of a semi-Persistent Scheduling (SPs) without PDCCH. Thus, because the P/SP-CSI reporting resources may not always be transmitted in configured P-CSI or SP-CSI reporting opportunities, the network entity may configure CSI reports to be transmitted with a relatively small periodicity (e.g., as compared to conventional P/SP-CSI reports). Thus, the techniques presented herein provide a good tradeoff between CSI reporting latency and trigger overhead.

Fig. 4 is a flow chart illustrating example operations 400 for wireless communication by a UE in accordance with certain aspects of the present disclosure. Operation 400 may be performed, for example, by UE 120a in wireless communication network 100. The operations 400 may be implemented as software components executing and running on one or more processors (e.g., the controller/processor 280 of fig. 2). Further, the UE's transmission and reception of signals in operation 400 may be implemented, for example, by one or more antennas (e.g., antenna 252 of fig. 2). In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor 280) that obtain and/or output the signals.

Operation 400 begins at 405 with the UE receiving a configuration from a network entity indicating a CSF reporting opportunity. For example, the UE may receive a configuration for the UE to provide CSI reporting via a P-CSI or SP-CSI reporting scheme.

At 410, the UE receives a DL transmission. For example, the UE may receive DCI triggering a report. At 415, the UE sends CSF only on some CSF reporting opportunities after receiving the DL transmission when one or more trigger conditions are met. According to certain aspects, the UE skips at least some CSF reporting opportunities (e.g., does not send CSF in at least some CSF reporting opportunities) when one or more trigger conditions are not met. As will be described in more detail below, the DCI may trigger a report based on some channel state information-reference signal (CSI-RS), and the UE may or may not send the report in a subsequent reporting opportunity (e.g., configured via the configuration received at block 405).

Fig. 5 is a flowchart illustrating example operations 500 for wireless communication by a network entity in accordance with certain aspects of the present disclosure. Operation 500 may be performed, for example, by BS110a in wireless communication network 100. Operation 500 may be an operation performed by a network entity that is complementary to operation 400 performed by a UE. The operations 500 may be implemented as software components executing and running on one or more processors (e.g., the controller/processor 240 of fig. 2). Further, the transmission and reception of signals by the network entity in operation 500 may be implemented, for example, by one or more antennas (e.g., antenna 234 of fig. 2). In certain aspects, the transmission and/or reception of signals by the network entity may be implemented via a bus interface of one or more processors (e.g., controller/processor 240) that obtain and/or output the signals.

Operation 500 at 505, the network entity sends a configuration to the UE indicating a CSF reporting opportunity. At 510, the network entity sends a DL transmission to the UE. At 515, the network entity receives CSF from the UE only on some CSF reporting opportunities after sending the DL transmission when one or more trigger conditions are met.

Operations 400 and 500 of fig. 4 and 5 may be understood with reference to schematic diagrams 600, 700, 800, 900, and 1000 of fig. 6, 7, 8, 9, and 10, respectively, with fig. 6, 7, 8, 9, and 10 illustrating example dynamic triggering and skipping of CSF in accordance with certain aspects of the present disclosure.

Fig. 6 illustrates an example dynamic triggering of CSF in accordance with certain aspects of the present disclosure. As shown in fig. 6, in the case where higher layer signaling (e.g., RRC signaling) configures one or more opportunities as SP-CSI reporting opportunities, dynamic triggering may be required to enable the UE to periodically report CSI. However, upon receiving such a trigger (e.g., activating a MAC-CE of an SP-CSI report), the UE may skip transmission of CSF in an activated slot in which DL data is not received. Instead, one or more SP-CSI reports may be triggered in an activated slot in which a DL transmission is received from a network entity. According to certain aspects, the DL transmission may be a DL grant (e.g., a DL grant associated with a high priority) or a semi-persistent scheduling (SPS) PDSCH (e.g., an SPS PDSCH without PDCCH associated with a high priority). As shown in fig. 6, after receiving a DL assignment (e.g., associated with a high priority), the UE may be triggered to send CSF (e.g., CSI report (s)) in both a first SP-CSI reporting opportunity (n=1) and a second SP-CSI reporting opportunity (n=2) (e.g., where N is an integer greater than 0, and N _max ＝2)。

Although fig. 6 illustrates dynamic triggering of CSF when the CSF reporting opportunity comprises an SP-CSI reporting opportunity activated via MAC-CE signaling, other embodiments may include dynamic triggering of CSF when the CSF reporting opportunity comprises a P-CSI reporting opportunity. In such embodiments, the CSI reporting opportunity may be activated without the need for a MAC-CE. However, the P-CSI report may not be triggered in the P-CSI report opportunity unless a DL transmission (e.g., DL grant or SPS PDSCH) is received in the slot.

Various options may be considered as shown in diagrams 700, 800, 900 and 1000 of fig. 7, 8, 9 and 10, respectively, for determining a time slot for sending a CSI report when the report is triggered by reception of a DL transmission. More specifically, the one or more trigger conditions may relate to a relative timing between a CSF report opportunity on which CSF is transmitted and a timing of DL grant or SPS PDSCH, a measurement resource on which the CSF is transmitted, or both.

Fig. 7 illustrates an example timeline 700 for transmitting CSF on only some CSF reporting opportunities after a UE receives a Downlink (DL) transmission, in accordance with certain aspects of the present disclosure.

According to a first option, the UE may perform channel and/or interference measurements using a first P/SP-CSI reference signal (P/SP-CSI-RS)/Interference Measurement (IM) resource at least a first threshold time T1 after receiving a DL grant or SPs PDSCH (shown as CSI-RS2 in fig. 7). In some examples, as also shown in the example of fig. 7, the UE may be triggered to transmit a P/SP-CSI report based on CSI-RS2 on a first P/SP-CSI reporting opportunity (N) that occurs at time T, which occurs at least a threshold time T2 (e.g., T > T2) after receiving the DL grant/SPs PDSCH and at least a threshold time T3 (e.g., T > T3) after measuring the resource CSI-RS 2. That is, the UE may be triggered to transmit a P/SP-CSI report based on CSI-RS2 on a first P/SP-CSI reporting opportunity (N) with times T > T2 and T3.

In some examples not shown in fig. 7, the UE may be triggered to transmit a P/SP-CSI report based on CSI-RS2 on a first P/SP-CSI reporting opportunity (N) that occurs at least at time T, which only satisfies T2 (e.g., T > T2) (regardless of time T relative to T3). In some other examples not shown in fig. 7, the UE may be triggered to send a P/SP-CSI report based on CSI-RS2 on a first P/SP-CSI reporting opportunity (N) that occurs at least at time T, which only satisfies T3 (e.g., T > T3) (regardless of time T relative to T2).

Fig. 8A and 8B illustrate other example timelines 800A and 800B, respectively, for transmitting CSF on only some CSF reporting opportunities after a UE receives a DL transmission, in accordance with certain aspects of the present disclosure. According to a second option, the UE may generate CSF (i.e., perform channel and/or interference measurements) based on the latest measurement resources satisfying the processing time constraint. That is, as shown in fig. 8A and 8B, the UE may generate CSF based on CSI-RS/IM occurring after receiving DL grant/SPS PDSCH (e.g., CSI-RS2 in fig. 8A) or based on CSI-RS/IM occurring before receiving DL grant/SPS PDSCH (e.g., CSI-RS1 in fig. 8B).

Generating CSF based on CSI-RS/IM resources that occur before DL grant/SPS PDSCH essentially requires that the UE always monitor measurement resources. After generating the P/SP-CSI report, the UE may be triggered to send the report based on the latest measurement resources on a first P/SP-CSI report opportunity (N) that occurs at least a threshold time T2 (at time T) (e.g., T > T2) after receiving the DL grant/SPs PDSCH.

Fig. 9 illustrates another example timeline 900 for transmitting CSF on only some CSF reporting opportunities after a UE receives a DL transmission, in accordance with certain aspects of the present disclosure. According to a third option, the UE may be configured to send CSF after DL grant or SPS PDSCH only if time T of the first reporting opportunity after DL grant or SPS PDSCH occurs at least a threshold time T2. In the example timeline 900 shown, the first P/SP-CSI reporting opportunity (N) that occurs at time T does not satisfy a threshold time T2 (e.g., T < T2) measured from the DL grant/SPs PDSCH. Thus, the UE may skip sending the P/SP-CSI report on the first P/SP-CSI reporting opportunity (N). In addition, the UE may not transmit the P/SP-CSI report in a subsequent reporting opportunity (n+1) that satisfies the threshold time T2. That is, in the event that the first reporting opportunity (N) does not meet the T2 threshold, the UE may skip transmission in the first reporting opportunity (N) and any subsequent reporting opportunities (e.g., n+1) because the CSI report may be considered too late (e.g., due to high mobility or other scenarios with rapidly changing channel conditions).

According to certain aspects, the UE may send only one report when the UE may receive multiple DL grants or SPS PDSCH that trigger CSFs in the same time slot. Fig. 10 illustrates an example timeline 1000 for transmitting CSF on only some CSF reporting opportunities after a UE receives multiple DL transmissions, in accordance with certain aspects of the present disclosure. Regarding the first, second, and third options described herein, in case the UE receives multiple DL grants or SPS PDSCH that trigger CSI reports in the same time slot, the UE may send only one P/SP-CSI report in that time slot.

As shown in fig. 10, regarding the second option, the UE may receive a first DL transmission (e.g., DL grant/SPS PDSCH 1) and a second DL transmission (e.g., DL grant/SPS PDSCH 2) that trigger CSFs in the same time slot. In response, the UE may send one P/SP-CSI report based on CSI-RS1 in this example in the indicated time slot (e.g., P/SP-CSI reporting opportunity satisfying T2). Multiple DL transmission triggers may be satisfied by sending a single P/SP-CSI report.

According to certain aspects, the UE may receive multiple DL grants or SPS PDSCH that trigger CSI reports in different time slots. For example, the UE may receive a first DL transmission triggering a first CSF in a first time slot and subsequently receive a second DL transmission triggering a second CSF in a second time slot. In the case where the first time slot for CSF transmission occurs before the second time slot for CSF transmission but after the second DL transmission, the UE may send the first CSF and determine not to send the second CSF because the first CSF is sent after the second DL transmission and may be considered up-to-date.

According to a fourth option, instead of using a configured P/SP-CSI reporting opportunity, the UE may be triggered to send CSF on a CSF reporting opportunity that occurs at a fixed offset after the DL grant or SPs PDSCH (e.g., may be considered a configured reporting opportunity in a time slot that occurs at a fixed offset after the DL grant or SPs PDSCH).

According to certain aspects, the case where CSF is sent only on some CSF reporting opportunities after DL transmissions are received may only occur when DL transmissions (e.g., DL grants or SPS PDSCH) have a given priority. For example, transmitting (enhanced) P/SP-CSI may be triggered only by the DL grant or SPs PDSCH associated with high priority. Thus, the P/SP-CSI report may be regarded as a high priority CSI report. In certain aspects, the case of sending CSF only on some CSF reporting opportunities after receiving a DL transmission may only occur when the DL transmission (e.g., DL grant or SPS PDSCH) has a priority above or equal to a priority threshold. For example, the case where CSF is sent only on some CSF reporting opportunities after DL transmissions are received may occur when DL transmissions have a priority of four, where the priority threshold is priority of three.

According to certain aspects, the UE may receive signaling indicating whether the UE may skip CSF reporting opportunities when one or more trigger conditions are not met. In some cases where the CSF reporting opportunity is a P-CSI reporting opportunity, RRC signaling may indicate whether the UE may skip the CSF reporting opportunity when one or more trigger conditions are not met. In some cases where the CSF reporting opportunity is an SP-CSI reporting opportunity that is activated via a MAC-CE, the MAC-CE may indicate whether the UE may skip the CSF reporting opportunity when one or more trigger conditions are not met. For example, the MAC-CE may be an enhanced MAC-CE indicating that SP-CSI opportunities may be skipped when the UE does not receive data.

According to certain aspects, the case where CSF is sent only on some CSF reporting opportunities after DL transmission is received may only occur when DL transmission is a PDCCH associated with a specific control resource set (CORESET)/search space or has a specific Downlink Control Information (DCI) format (e.g., DCI 1_2).

According to certain aspects, the case where CSF is sent only on some CSF reporting opportunities after DL transmission is received may only occur when one or more fields of DL transmission indicate a particular code point. For example, one or more other fields in the DCI other than the priority field, including a field with a hybrid automatic repeat request (HARQ) process number, a field with a Modulation and Coding Scheme (MCS), and a field with a Physical Uplink Control Channel (PUCCH) resource indicator, may be used to trigger CSF.

Example Wireless communication device

Fig. 11 illustrates a communication device 1100 that may include various components (e.g., corresponding to the unit-plus-function components) configured to perform operations of the techniques disclosed herein, such as operation 400 shown in fig. 4. In some examples, communication device 1100 may be a User Equipment (UE), such as UE 120 described with respect to fig. 1 and 2, for example.

The communication device 1100 includes a processing system 1102 coupled to a transceiver 1108 (e.g., a transmitter and/or receiver). Transceiver 1108 is configured to transmit and receive signals for communication device 1100, such as the various signals described herein, via antenna 1110. The processing system 1102 may be configured to perform processing functions of the communication device 1100, including processing signals received and/or to be transmitted by the communication device 1100.

The processing system 1102 includes a processor 1104 coupled to a computer-readable medium/memory 1112 via a bus 1106. In certain aspects, the computer-readable medium/memory 1112 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1104, cause the processor 1104 to perform the operations 400 illustrated in fig. 4 or other operations for performing various techniques for dynamically triggering or skipping Channel State Information (CSI) reporting discussed herein. In certain aspects, the computer-readable medium/memory 1112 stores code 1114 for receiving (e.g., for receiving a configuration indicating Channel State Feedback (CSF) reporting opportunities from a network entity and/or for receiving Downlink (DL) transmissions); code 1116 for generating (e.g., for generating CSF based on the latest measurement resources satisfying the processing time constraint); code 1118 for transmitting (e.g., for transmitting CSF only on some CSF reporting opportunities after receiving a DL transmission when one or more trigger conditions are met); and code 1120 for skipping (e.g., for skipping at least some CSF reporting opportunities when one or more trigger conditions are not met); etc.

Examples of computer readable media/memory 1112 include Random Access Memory (RAM), read Only Memory (ROM), solid state memory, hard drives, and the like. In some examples, computer readable medium/memory 1112 is used to store computer readable, computer executable software comprising instructions that, when executed, cause a processor to perform the various functions described herein. In some cases, the memory contains a basic input/output system (BIOS) or the like that controls basic hardware or software operations, such as interactions with peripheral components or devices. In some cases, the memory controller operates the memory cells. For example, the memory controller may include a row decoder, a column decoder, or both. In some cases, the memory cells within the memory store information in the form of logical states.

In certain aspects, the processor 1104 has circuitry configured to implement code stored in the computer-readable medium/memory 1112. Processor 1104 includes circuitry 1124 for receiving (e.g., for receiving a configuration indicating a CSF report opportunity from a network entity and/or for receiving a DL transmission); circuitry 1126 for generating (e.g., for generating CSF based on the latest measurement resources satisfying the processing time constraint); circuitry 1128 for transmitting (e.g., for transmitting CSF only on some CSF reporting opportunities after receiving a DL transmission when one or more trigger conditions are met); circuitry 1130 for skipping (e.g., for skipping at least some CSF reporting opportunities when one or more trigger conditions are not met); etc.

The various components of the communication device 1100 may provide means for performing the methods described herein (including with respect to fig. 4).

In some examples, the means for transmitting or transmitting (or the means for outputting for transmission) may include the transceiver 254 and/or antenna(s) 252 of the UE 120 shown in fig. 2, and/or the transceiver 1108 and antenna 1110 of the communication device 1100 shown in fig. 11.

In some examples, the means for communicating or receiving (or means for obtaining) may include transceiver 254 and/or antenna(s) 252 of UE 120 shown in fig. 2 and/or transceiver 1108 and antenna 1110 of communication device 1100 shown in fig. 11.

In some examples, the means for generating and the means for skipping may include various processing system 1102 components, such as: one or more processors 1104 in fig. 11, or aspects of UE 120 shown in fig. 2, include a receive processor 258, a transmit processor 264, a TX MIMO processor 266, and/or a controller/processor 280.

Note that fig. 11 is only one example of use, and many other examples and configurations of the communication device 1100 are possible.

Fig. 12 illustrates a communication device 1200 that may include various components (e.g., corresponding to the unit-plus-function components) configured to perform operations of the techniques disclosed herein (e.g., operation 500 shown in fig. 5). In some examples, the communication device 1200 may be a network entity, such as, for example, the Base Station (BS) 110 described with respect to fig. 1 and 2.

The communication device 1200 includes a processing system 1202 coupled to a transceiver 1208 (e.g., transmitter and/or receiver). The transceiver 1208 is configured to transmit and receive signals for the communication device 1200, such as the various signals as described herein, via the antenna 1210. The processing system 1202 may be configured to perform processing functions of the communication device 1200, including processing signals received and/or to be transmitted by the communication device 1200.

The processing system 1202 includes a processor 1204 coupled to a computer readable medium/memory 1212 via a bus 1206. In certain aspects, computer-readable medium/memory 1212 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 1204, cause processor 1204 to perform the operations shown in fig. 5, or other operations for performing the various techniques discussed herein for dynamically triggering or skipping CSI reporting.

In certain aspects, the computer-readable medium/memory 1212 stores code 1214 for transmitting (e.g., for transmitting a configuration indicating CSF reporting opportunities to the UE and/or for transmitting DL transmissions to the UE); code 1216 for receiving (e.g., for receiving CSF from the UE only on some CSF reporting opportunities after sending the DL transmission when one or more trigger conditions are met); etc.

Examples of the computer-readable medium/memory 1212 include RAM, ROM, solid state memory, a hard disk drive, and the like. In some examples, computer-readable medium/memory 1212 is used to store computer-readable, computer-executable software comprising instructions that, when executed, cause a processor to perform the various functions described herein. In some cases, the memory contains a BIOS or the like that controls basic hardware or software operations, such as interactions with peripheral components or devices. In some cases, the memory controller operates the memory cells. For example, the memory controller may include a row decoder, a column decoder, or both. In some cases, the memory cells within the memory store information in the form of logical states.

In certain aspects, the processor 1204 has circuitry configured to implement code stored in the computer readable medium/memory 1212. The processor 1204 includes circuitry 1224 for transmitting (e.g., for transmitting a configuration indicating a CSF report opportunity to a UE and/or for transmitting a DL transmission to the UE); circuitry 1226 for receiving (e.g., for receiving CSF from the UE only some CSF reporting opportunities after sending the DL transmission when one or more trigger conditions are met); etc.

The various components of the communication device 1200 may provide means for performing the methods described herein (including with respect to fig. 5).

In some examples, the means for transmitting or transmitting (or the means for outputting for transmission) may include transceiver 232 and/or antenna(s) 234 of BS110 shown in fig. 2 and/or transceiver 1208 and antenna 1210 of communication device 1200 shown in fig. 12.

In some examples, the means for communicating or receiving (or means for obtaining) may include transceiver 232 and/or antenna(s) 234 of BS110 shown in fig. 2 and/or transceiver 1208 and antenna 1210 of communication device 1200 shown in fig. 12.

Note that fig. 12 is only one example of use, and many other examples and configurations of the communication device 1200 are possible.

Example aspects

Aspect 1: a method for wireless communication by a User Equipment (UE), comprising: receiving a configuration from a network entity indicating a Channel State Feedback (CSF) reporting opportunity; receiving a Downlink (DL) transmission; and when one or more trigger conditions are met, transmitting CSF only on some CSF reporting opportunities after receiving DL transmissions.

Aspect 2: the method of aspect 1, further comprising: at least some CSF reporting opportunities are skipped when one or more trigger conditions are not met.

Aspect 3: the method of aspect 1 or 2, wherein the CSF reporting opportunity comprises a periodic channel state information (P-CSI) reporting opportunity.

Aspect 4: the method of any of aspects 1-3, wherein the CSF reporting opportunity comprises a semi-persistent channel state information (SP-CSI) reporting opportunity activated via Medium Access Control (MAC) Control Element (CE) signaling.

Aspect 5: the method of any of aspects 1-4, wherein the DL transmission comprises at least one of a DL grant or a semi-persistent scheduling (SPS) Physical Downlink Shared Channel (PDSCH).

Aspect 6: the method of any of aspects 1-5, wherein the one or more trigger conditions relate to a relative timing between a CSF report opportunity on which CSF is sent and at least one of: DL grant or semi-persistent scheduling (SPS) Physical Downlink Shared Channel (PDSCH); or the measurement resources on which the transmitted CSF is based.

Aspect 7: the method according to aspect 6, wherein: the measurement resources occur at least a first threshold after the DL grant or SPS PDSCH; and the CSF report opportunity on which CSF is sent occurs at least at one of a second threshold value after the grant or SPS PDSCH or a third threshold value after the measurement resources.

Aspect 8: the method of aspects 6 or 7, wherein the CSF reporting opportunity on which CSF is sent occurs at least a threshold after the grant or SPS PDSCH.

Aspect 9: the method of aspect 8, wherein the UE generates the CSF based on the latest measurement resources satisfying a processing time constraint.

Aspect 10: the method of aspect 8 or 9, wherein the UE is configured to send CSF only if a first reporting opportunity following the grant or SPS PDSCH occurs at least at the threshold after the grant or SPS PDSCH.

Aspect 11: the method of any of aspects 5-10, wherein the UE sends CSF on a CSF report opportunity at a fixed offset occurring after the grant or SPS PDSCH when the one or more trigger conditions are met.

Aspect 12: the method of any of aspects 1-11, wherein if the UE receives multiple DL transmissions triggering CSF reports in a same time slot, the UE sends only one CSF report in that time slot.

Aspect 13: the method of any one of aspects 1-12, wherein: if the UE receives a first DL transmission triggering a first CSF in a first time slot and a second DL transmission triggering a second CSF in a second time slot, wherein the first time slot occurs before the second time slot and after the second DL transmission, the UE transmits the first CSF without transmitting the second CSF.

Aspect 14: the method of any of aspects 1-13, wherein the one or more trigger conditions are met only if the DL transmission has a priority that is greater than or equal to a priority threshold.

Aspect 15: the method of any one of aspects 1-14, further comprising: signaling is received indicating whether the UE can skip CSF reporting opportunities when the one or more trigger conditions are not met.

Aspect 16: the method of aspect 15, wherein: the CSF reporting opportunities include periodic channel state information (P-CSI) reporting opportunities; and the signaling includes Radio Resource Control (RRC) signaling.

Aspect 17: the method of aspect 15 or 16, wherein: the CSF reporting opportunities include semi-persistent channel state information (SP-CSI) reporting opportunities activated via a Medium Access Control (MAC) Control Element (CE); and the MAC CE indicates whether the UE can skip signaling of CSF reporting opportunities when the one or more trigger conditions are not satisfied.

Aspect 18: the method of any of aspects 1-17, wherein the one or more trigger conditions are met only if the DL transmission includes a Physical Downlink Control Channel (PDCCH) associated with a particular set of control resources (CORESET) or has a particular Downlink Control Information (DCI) format.

Aspect 19: the method of any of aspects 1-18, wherein the one or more trigger conditions are met only if one or more fields of the DL transmission indicate a particular code point.

Aspect 20: a method for wireless communication by a network entity, comprising: transmitting a configuration indicating a Channel State Feedback (CSF) reporting opportunity to a User Equipment (UE); transmitting a Downlink (DL) transmission to the UE; and when one or more trigger conditions are met, receiving CSF from the UE only on some CSF reporting opportunities after sending the DL transmission.

Aspect 21: the method of aspect 20, wherein the CSF reporting opportunity comprises a periodic channel state information (P-CSI) reporting opportunity.

Aspect 22: the method of aspects 20 or 21, wherein the CSF reporting opportunity comprises a semi-persistent channel state information (SP-CSI) reporting opportunity activated via Medium Access Control (MAC) Control Element (CE) signaling.

Aspect 23: the method of any of claims 20-22, wherein the DL transmission comprises at least one of a DL grant or a semi-persistent scheduling (SPS) Physical Downlink Shared Channel (PDSCH).

Aspect 24: the method of any of claims 20-23, wherein the one or more trigger conditions relate to a relative timing between a CSF report opportunity on which CSF is sent and at least one of: DL grant or semi-persistent scheduling (SPS) Physical Downlink Shared Channel (PDSCH); or the measurement resources on which the transmitted CSF is based.

Aspect 25: the method of aspect 24, wherein: the measurement resources occur at least a first threshold after the grant or SPS PDSCH; and the CSF report opportunity on which CSF is sent occurs at least at one of: a second threshold after the grant or SPS PDSCH; or a third threshold after the measurement resource.

Aspect 26: the method of aspects 24 or 25, wherein the CSF reporting opportunity on which CSF is sent occurs at least a threshold after the grant or SPS PDSCH.

Aspect 27: the method of aspect 26, wherein the UE generates the CSF based on the latest measurement resources satisfying a processing time constraint.

Aspect 28: the method of aspects 26 or 27, wherein the UE is configured to transmit CSF only if a first reporting opportunity following the grant or SPS PDSCH occurs at least the threshold after the grant or SPS PDSCH.

Aspect 29: the method of any of aspects 23-28, wherein the UE transmits CSF on a CSF report opportunity that occurs at a fixed offset after the grant or SPS PDSCH.

Aspect 30: the method according to any of the claims 20-29, wherein if the network entity sends multiple DL transmissions triggering CSF reports in the same time slot, the network entity receives only one CSF report from the UE in that time slot.

Aspect 31: the method of any of claims 20-30, wherein if the network entity sends a first DL transmission triggering a first CSF in a first time slot and a second DL transmission triggering a second CSF in a second time slot, wherein the first time slot occurs before the second time slot and after the second DL transmission, the network entity receives only the first CSF and not the second CSF.

Aspect 32: the method of any of aspects 20-31, wherein the one or more trigger conditions are met only if the DL transmission has a given priority.

Aspect 33: the method of any of aspects 20-32, further comprising: signaling is sent to the UE indicating whether the UE can skip CSF reporting opportunities when the one or more trigger conditions are not met.

Aspect 34: the method of aspect 33, wherein: the CSF reporting opportunities include periodic channel state information (P-CSI) reporting opportunities; and the signaling includes Radio Resource Control (RRC) signaling.

Aspect 35: the method of aspect 33 or 34, wherein: the CSF reporting opportunities include semi-persistent channel state information (SP-CSI) reporting opportunities activated via a Medium Access Control (MAC) Control Element (CE); and the MAC CE indicates whether the UE can skip signaling of CSF reporting opportunities when the one or more trigger conditions are not satisfied.

Aspect 36: the method of any of claims 20-35, wherein the one or more trigger conditions are met only if the DL transmission includes a Physical Downlink Control Channel (PDCCH) associated with a particular set of control resources (CORESET) or has a particular Downlink Control Information (DCI) format.

Aspect 37: the method of any of aspects 20-36, wherein the one or more trigger conditions are met only if one or more fields of the DL transmission indicate a particular code point.

Aspect 38: an apparatus, comprising: a memory comprising computer-executable instructions and one or more processors configured to execute the computer-executable instructions and cause the one or more processors to perform the method of any one of aspects 1-19.

Aspect 39: an apparatus comprising means for performing the method according to any one of aspects 1-19.

Aspect 40: a non-transitory computer-readable medium comprising computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method of any of aspects 1-19.

Aspect 41: a computer program product embodied on a computer-readable storage medium comprising code for performing the method of any of aspects 1-19.

Aspect 42: an apparatus, comprising: a memory comprising computer-executable instructions and one or more processors configured to execute the computer-executable instructions and cause the one or more processors to perform the method of any of aspects 20-37.

Aspect 43: an apparatus comprising means for performing the method according to any one of aspects 20-37.

Aspect 44: a non-transitory computer-readable medium comprising computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method of any of aspects 20-37.

Aspect 45: a computer program product embodied on a computer-readable storage medium comprising code for performing the method of any of aspects 20-37.

Other considerations

The methods disclosed herein comprise one or more steps or actions for achieving the described method. The method steps and/or actions may be interchanged with one another without departing from the scope of the claims. That is, unless a particular order of steps or actions is specified, the order and/or use of particular steps and/or actions may be modified without departing from the scope of the claims.

As used herein, a phrase referring to "at least one" in a list of items refers to any combination of those items, including individual members. As an example, "at least one of: a. b or c "is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination having a plurality of the same elements (e.g., a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b-b, b-b-c, c-c, and c-c, or any other ordering of a, b, and c).

As used herein, the term "determining" includes a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), and so forth. Also, "determining" may include parsing, selecting, choosing, establishing, and the like.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language of the claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated, but rather "one or more". The term "some" means one or more unless specifically stated otherwise. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Furthermore, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element should be construed in accordance with the specification of 35u.s.c. ≡112 (f) unless the element is explicitly expressed by the phrase "unit for … …" or, in the case of a method claim, the phrase "step for … …" is used.

The various operations of the above-described methods may be performed by any suitable unit capable of performing the corresponding functions. The unit may include various hardware and/or software components and/or modules including, but not limited to, a circuit, an Application Specific Integrated Circuit (ASIC), or a processor. Generally, where there are operations shown in the figures, those operations may have corresponding elements plus functional components with like numbers.

The various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable Logic Device (PLD), 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, but in the alternative, the processor may be any commercially available processor, controller, microcontroller or state machine. A processor may also be implemented as a combination of computing devices, e.g., 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.

If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented with a bus architecture. The bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints. The bus may link together various circuits including processors, machine-readable media, and bus interfaces. The bus interface may be used to connect network adapters and the like to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the case of a user terminal (see fig. 1), a user interface (e.g., keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further. A processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry capable of executing software. Those skilled in the art will recognize how best to implement the described functionality of the processing system, depending on the particular application and the overall design constraints imposed on the overall system.

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. Software should be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other terminology. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The processor may be responsible for managing the bus and general processing, including the execution of software modules stored on a machine-readable storage medium. A computer readable storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. By way of example, machine-readable media may comprise a transmission line, a carrier wave modulated by data, and/or a computer-readable storage medium having instructions stored thereon that are separate from the wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, the machine-readable medium, or any portion thereof, may be integrated into the processor, such as in the case of having a cache memory and/or a general purpose register file. By way of example, a machine-readable storage medium may comprise RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), a register, a magnetic disk, an optical disk, a hard disk drive, or any other suitable storage medium, or any combination thereof. The machine-readable medium may be embodied in a computer program product.

A software module may include a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media. The computer readable medium may include a plurality of software modules. The software modules include instructions that, when executed by a device, such as a processor, cause the processing system to perform various functions. The software modules may include a transmitting module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices. As an example, when a trigger event occurs, the software module may be loaded from the hard disk drive into RAM. During execution of the software module, the processor may load some instructions into the cache to increase access speed. One or more cache lines may then be loaded into a general purpose register file for execution by the processor. When reference is made below to the function of a software module, it will be understood that such function is carried out by the processor when executing instructions from the software module.

Further, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), or wireless technologies such as Infrared (IR), radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of 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. Thus, in some aspects, a computer-readable medium may include a non-transitory computer-readable medium (e.g., a tangible medium). Additionally, for other aspects, the computer-readable medium may include a transitory computer-readable medium (e.g., a signal). Combinations of the above should also be included within the scope of computer-readable media.

Accordingly, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon that are executable by one or more processors to implement the operations described herein. For example, instructions for implementing the operations described herein and shown in fig. 4 and/or 5.

Furthermore, it should be understood that modules and/or other suitable elements for performing the methods and techniques described herein may be downloaded and/or otherwise obtained (if applicable) by a user terminal and/or base station. For example, such a device may be coupled to a server to facilitate the transfer of elements for performing the methods described herein. Alternatively, the various methods described herein may be provided via a storage unit (e.g., RAM, ROM, a physical storage medium such as a Compact Disc (CD) or floppy disk, etc.), such that the user terminal and/or base station can obtain the various methods immediately after the storage unit is coupled or provided to the device. Further, any other suitable technique for providing the methods and techniques described herein to a device may be utilized.

It is to be understood that the claims are not limited to the precise arrangements and instrumentalities described above. Various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims (30)

1. A User Equipment (UE), comprising:

a memory; and

one or more processors coupled to the memory, the memory and the one or more processors configured to cause the UE to:

receiving a configuration from a network entity indicating a Channel State Feedback (CSF) reporting opportunity;

receiving a Downlink (DL) transmission; and

when one or more trigger conditions are met, CSF is sent only on some CSF reporting opportunities after the DL transmission is received.

2. The UE of claim 1, wherein the memory and the one or more processors are further configured to cause the UE to:

at least some CSF reporting opportunities are skipped when one or more trigger conditions are not met.

3. The UE of claim 1, wherein the CSF reporting opportunity comprises a periodic channel state information (P-CSI) reporting opportunity.

4. The UE of claim 1, wherein the CSF reporting opportunity comprises a semi-persistent channel state information (SP-CSI) reporting opportunity activated via Medium Access Control (MAC) Control Element (CE) signaling.

5. The UE of claim 1, wherein the DL transmission comprises at least one of a DL grant or a semi-persistent scheduling (SPS) Physical Downlink Shared Channel (PDSCH).

6. The UE of claim 1, wherein the one or more trigger conditions relate to a relative timing between a CSF report opportunity on which CSF is sent and at least one of:

DL grant or semi-persistent scheduling (SPS) Physical Downlink Shared Channel (PDSCH); or alternatively

The measurement resources on which the CSF is sent are based.

7. The UE of claim 6, wherein:

the measurement resources occur at least a first threshold after the DL grant or SPS PDSCH; and

the CSF report opportunity on which CSF is sent occurs at least one of:

a second threshold after the DL grant or SPS PDSCH; or (b)

A third threshold after the measurement resource.

8. The UE of claim 6, wherein the CSF report opportunity on which CSF is sent occurs at least a threshold after the DL grant or SPS PDSCH.

9. The UE of claim 8, wherein the memory and the one or more processors are further configured to cause the UE to:

the CSF is generated based on the latest measurement resources satisfying a processing time constraint.

10. The UE of claim 8, wherein the memory and the one or more processors are configured to cause the UE to send the CSF only on some CSF reporting opportunities after receiving the DL transmission when the one or more trigger conditions are met comprises: the memory and the one or more processors are configured to cause the UE to:

CSF is sent only if a first reporting opportunity after the DL grant or SPS PDSCH occurs at least the threshold after the DL grant or SPS PDSCH.

11. The UE of claim 5, wherein the CSF is sent on a CSF report opportunity occurring at a fixed offset after the DL grant or SPS PDSCH when the one or more trigger conditions are met.

12. The UE of claim 1, wherein the memory and the one or more processors are configured to cause the UE to send the CSF only on some CSF reporting opportunities after receiving the DL transmission when the one or more trigger conditions are met comprises: the memory and the one or more processors are configured to cause the UE to:

if the UE receives multiple DL transmissions that trigger CSF reports in the same time slot, only one CSF report is sent in that time slot.

13. The UE of claim 1, wherein the memory and the one or more processors are configured to cause the UE to send the CSF only on some CSF reporting opportunities after receiving the DL transmission when the one or more trigger conditions are met comprises: the memory and the one or more processors are configured to cause the UE to:

if the UE receives a first DL transmission triggering a first CSF in a first time slot and a second DL transmission triggering a second CSF in a second time slot, wherein the first time slot occurs before the second time slot and after the second DL transmission, the first CSF is transmitted without the second CSF.

14. The UE of claim 1, wherein the one or more trigger conditions are satisfied only if the DL transmission has a priority that is greater than or equal to a priority threshold.

15. The UE of claim 1, wherein the memory and the one or more processors are further configured to cause the UE to:

signaling is received indicating whether the UE can skip CSF reporting opportunities when the one or more trigger conditions are not met.

16. The UE of claim 15, wherein:

The CSF reporting opportunities include periodic channel state information (P-CSI) reporting opportunities; and

the signaling includes Radio Resource Control (RRC) signaling.

17. The UE of claim 15, wherein:

the CSF reporting opportunities include semi-persistent channel state information (SP-CSI) reporting opportunities activated via a Medium Access Control (MAC) Control Element (CE); and

the MAC CE indicates whether the UE may skip CSF reporting opportunities when the one or more trigger conditions are not met.

18. The UE of claim 1, wherein the one or more trigger conditions are satisfied only if the DL transmission includes a Physical Downlink Control Channel (PDCCH) associated with a particular control resource set (CORESET) or has a particular Downlink Control Information (DCI) format.

19. The UE of claim 1, wherein the one or more trigger conditions are satisfied only if one or more fields of the DL transmission indicate a particular code point.

20. A network entity, comprising:

a memory; and

one or more processors coupled to the memory, the memory and the one or more processors configured to cause the network entity to:

Transmitting a configuration indicating a Channel State Feedback (CSF) reporting opportunity to a User Equipment (UE);

transmitting a Downlink (DL) transmission to the UE; and

when one or more trigger conditions are met, CSF is received from the UE only on some CSF reporting opportunities after sending the DL transmission.

21. The network entity of claim 20, wherein the CSF reporting opportunity comprises a periodic channel state information (P-CSI) reporting opportunity.

22. The network entity of claim 20, wherein the CSF reporting opportunity comprises a semi-persistent channel state information (SP-CSI) reporting opportunity activated via Medium Access Control (MAC) Control Element (CE) signaling.

23. The network entity of claim 20, wherein the DL transmission comprises at least one of a DL grant or a semi-persistent scheduling (SPS) Physical Downlink Shared Channel (PDSCH).

24. The network entity of claim 20, wherein the one or more trigger conditions relate to a relative timing between a CSF report opportunity on which CSF is sent and at least one of:

DL grant or semi-persistent scheduling (SPS) Physical Downlink Shared Channel (PDSCH); or alternatively

The measurement resources on which the CSF is sent are based.

25. The network entity of claim 24, wherein:

the measurement resources occur at least a first threshold after the DL grant or SPS PDSCH; and

the CSF report opportunity on which CSF is sent occurs at least at one of:

a second threshold after the DL grant or SPS PDSCH; or (b)

A third threshold after the measurement resource.

26. The network entity of claim 24, wherein the CSF reporting opportunity on which CSF is sent occurs at least a threshold after the DL grant or SPS PDSCH.

27. The network entity of claim 20, wherein when the memory and the one or more processors are configured to cause the network entity to send the DL transmission to the UE comprises the memory and the one or more processors are configured to cause the UE to send multiple DL transmissions that trigger CSF reports in a same time slot, the network entity receives only one CSF report from the UE in that time slot.

28. The network entity of claim 20, wherein when the memory and the one or more processors are configured to cause the network entity to send the DL transmission to the UE comprises the memory and the one or more processors are configured to cause the UE to send a first DL transmission triggering a first CSF in a first time slot and a second DL transmission triggering a second CSF in a second time slot, wherein the first time slot occurs before the second time slot and after the second DL transmission, the network entity receives only the first CSF and not the second CSF.

29. A method for wireless communication by a User Equipment (UE), comprising:

receiving a configuration from a network entity indicating a Channel State Feedback (CSF) reporting opportunity;

receiving a Downlink (DL) transmission; and

when one or more trigger conditions are met, CSF is sent only on some CSF reporting opportunities after the DL transmission is received.

30. A method for wireless communication by a network entity, comprising:

transmitting a configuration indicating a Channel State Feedback (CSF) reporting opportunity to a User Equipment (UE);

transmitting a Downlink (DL) transmission to the UE; and

when one or more trigger conditions are met, CSF is received from the UE only on some CSF reporting opportunities after sending the DL transmission.