Efficient update and activation of channel state information (CSI)-reference signal (RS) trigger status

Abstract

Certain aspects of the present disclosure relate to a method for wireless communication. The method generally includes: receiving a configuration of triggering states for channel state information (CSI)-reference signal (RS) reporting; receiving first downlink control information (DCI) activating one of the triggering states; receiving CSI-RS according to one of the triggered states being activated; and processing the CSI-RS.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Application No. 17 / 114,026, filed on December 7, 2020, which claims the benefit of and priority to U.S. Provisional Application No. 62 / 948,525, filed on December 16, 2019, both of which are assigned to the assignee of this application and are hereby expressly incorporated herein by reference as if fully set forth below and for all applicable purposes.

[0003] introduction

[0004] Aspects of the present disclosure relate to wireless communications and, more particularly, to techniques for trigger state configuration and activation.

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) 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 just a few.

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies.

[0008] Overview

[0009] The systems, methods and devices of the disclosure each have several innovative aspects, no single one of which is solely responsible for its desirable attributes.

[0010] Certain aspects of the present disclosure relate to a method for wireless communication. The method generally includes: receiving a configuration of triggering states for channel state information (CSI)-reference signal (RS) reporting; receiving first downlink control information (DCI) activating one of the triggering states; receiving CSI-RS according to one of the triggered states being activated; and processing the CSI-RS.

[0011] Certain aspects of the present disclosure are directed to a method for wireless communication. The method generally includes transmitting a configuration of triggering states for CSI-RS reporting, and transmitting a first DCI activating one of the triggering states.

[0012] Certain aspects of the present disclosure relate to a method for wireless communication. The method generally includes: receiving a configuration of trigger states for CSI-RS reporting; receiving an indication of an update of one or more parameters for at least one of the trigger states; receiving CSI-RS according to the at least one of the trigger states having the updated one or more parameters; and processing the CSI-RS.

[0013] Certain aspects of the present disclosure are directed to a method for wireless communication. The method generally includes transmitting a configuration of triggering states for CSI-RS reporting and transmitting an indication of an update of one or more parameters for at least one of the triggering states.

[0014] Certain aspects of the present disclosure relate to an apparatus for wireless communication. The apparatus generally includes a memory and one or more processors coupled to the memory, the one or more processors and the memory being configured to: receive a configuration of trigger states for CSI-RS reporting; receive a first DCI activating one of the trigger states; receive a CSI-RS according to the activated one of the trigger states; and process the CSI-RS.

[0015] Certain aspects of the present disclosure are directed to an apparatus for wireless communication. The apparatus generally includes a memory and one or more processors coupled to the memory, the one or more processors and the memory being configured to: transmit a configuration of trigger states for CSI-RS reporting; transmit a first DCI activating one of the trigger states; and receive CSI-RS feedback according to the activated one of the trigger states.

[0016] Certain aspects of the present disclosure relate to an apparatus for wireless communication. The apparatus generally includes a memory and one or more processors coupled to the memory, the one or more processors and the memory being configured to: receive a configuration of trigger states for CSI-RS reporting; receive an indication of an update of one or more parameters for at least one of the trigger states; receive CSI-RS according to the at least one of the trigger states having the updated one or more parameters; and process the CSI-RS.

[0017] Certain aspects of the present disclosure are directed to an apparatus for wireless communication. The apparatus generally includes a memory and one or more processors coupled to the memory, the one or more processors and the memory being configured to: transmit a configuration of triggering states for CSI-RS reporting, and transmit an indication of an update of one or more parameters for at least one of the triggering states.

[0018] Certain aspects of the present disclosure relate to an apparatus for wireless communication. The apparatus generally includes: a device for receiving a configuration of trigger states for CSI-RS reporting; a device for receiving a first DCI for activating one of the trigger states; a device for receiving CSI-RS according to the activated one of the trigger states; and a device for processing CSI-RS.

[0019] Certain aspects of the present disclosure are directed to an apparatus for wireless communication. The apparatus generally includes means for transmitting a configuration of triggering states for CSI-RS reporting and means for transmitting a first DCI activating one of the triggering states.

[0020] Certain aspects of the present disclosure relate to an apparatus for wireless communication. The apparatus generally includes: means for receiving a configuration of trigger states for CSI-RS reporting; means for receiving an indication of an update of one or more parameters for at least one of the trigger states; and means for receiving CSI-RS according to the at least one of the trigger states having the updated one or more parameters; and means for processing the CSI-RS.

[0021] Certain aspects of the present disclosure relate to an apparatus for wireless communications. The apparatus generally includes means for transmitting a configuration of triggering states for CSI-RS reporting and means for transmitting an indication of an update of one or more parameters for at least one of the triggering states.

[0022] Certain aspects of the present disclosure relate to a computer-readable medium having instructions stored thereon for: receiving a configuration of trigger states for CSI-RS reporting; receiving a first DCI activating one of the trigger states; receiving a CSI-RS based on the activated one of the trigger states; and processing the CSI-RS.

[0023] Certain aspects of the present disclosure relate to a computer-readable medium having instructions stored thereon for transmitting a configuration of triggering states for CSI-RS reporting and transmitting a first DCI activating one of the triggering states.

[0024] Certain aspects of the present disclosure relate to a computer-readable medium having instructions stored thereon for: receiving a configuration of trigger states for CSI-RS reporting; receiving an indication of an update to one or more parameters for at least one of the trigger states; receiving a CSI-RS based on the at least one of the trigger states having the updated one or more parameters; and processing the CSI-RS.

[0025] Certain aspects of the present disclosure relate to a computer-readable medium having instructions stored thereon for transmitting a configuration of triggering states for CSI-RS reporting and transmitting an indication of an update to one or more parameters for at least one of the triggering states.

[0026] To achieve the foregoing and related ends, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail some illustrative features of one or more aspects. However, these features are only indicative of several of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The details of one or more implementations of the subject matter described in the present disclosure are set forth in the accompanying drawings and the following description. However, the accompanying drawings illustrate only some typical aspects of the present disclosure and are therefore not to be considered to limit its scope. Other features, aspects and advantages will become apparent from the description, drawings and claims.

[0029] Figure 1 An example wireless communication network is shown in which aspects of the present disclosure may be performed.

[0030] Figure 2 Shown is a block diagram illustrating an example base station (BS) and an example user equipment (UE) according to some aspects of the present disclosure.

[0031] Figure 3 An example of a frame format for a telecommunications system is illustrated in accordance with certain aspects of the present disclosure.

[0032] Figure 4

[0013] Example operations for downlink control information (DCI) based triggered state activation by a BS are illustrated in accordance with some aspects of the present disclosure.

[0033] Figure 5Example operations for DCI based triggered state activation by a UE are illustrated in accordance with some aspects of the present disclosure.

[0034] Figure 6

[0013] Example operations for dynamically triggered status updates by a BS are illustrated in accordance with some aspects of the present disclosure.

[0035] Figure 7 Example operations for dynamically triggering status updates by a UE are illustrated in accordance with some aspects of the present disclosure.

[0036] Figure 8 is a call flow diagram illustrating example operations for DCI-based trigger state activation and dynamic trigger state update in accordance with some aspects of the present disclosure.

[0037] Fig. 9 Illustrated are communications devices that may include various components configured to perform operations for the techniques disclosed herein.

[0038] Fig.10 Illustrated are communications devices that may include various components configured to perform operations for the techniques disclosed herein.

[0039] 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 in other aspects without specific recitation.

[0040] Detailed Description

[0041] Various aspects of the present disclosure provide apparatus (devices), methods, processing systems, and computer-readable media for trigger state activation and dynamic trigger state update based on downlink control information (DCI). For example, in order to reduce the trigger state activation waiting time, DCI may be used to activate a trigger state configured (e.g., preconfigured) using radio resource control (RRC) signaling. The activated trigger state may be used for channel state information (CSI)-reference signal (RS) reporting. In certain aspects, DCI or media access control (MAC)-control element (CE) may be used to dynamically update one or more parameters of at least one of these trigger states. In other words, instead of configuring a new trigger state in response to a change in channel conditions, DCI or MAC-CE may be transmitted to the UE to update one or more parameters of at least one trigger state to be used for CSI-RS reporting.

[0042] The following description provides an example of DCI-based trigger state activation and dynamic update of trigger state in a communication system, without limiting the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various examples may appropriately omit, replace, or add various procedures or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Moreover, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functionalities, or structures and functionalities as supplements to the various aspects of the present disclosure set forth herein or in addition. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of the claims. The wording "exemplary" is used herein to mean "used as an example, instance, or explanation". Any aspect described as "exemplary" herein is not necessarily to be interpreted as superior to or superior to other aspects.

[0043] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, subcarrier, frequency channel, frequency modulation, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, a 5G NR RAT network may be deployed.

[0044] Figure 1 An example wireless communication network 100 is illustrated in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be a NR system (e.g., a 5G NR network).

[0045] like Figure 1 As illustrated in , the wireless communication network 100 may include several base stations (BSs) 110a-z (each also individually referred to herein as BS 110 or collectively referred to as BS 110) and other network entities. BS 110 may provide communication coverage for a particular geographic area (sometimes referred to as a "cell"), which may be stationary or mobile depending on the location of mobile BS 110. In some examples, BS 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.) using any suitable transport network. Figure 1In the example shown in , BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for a pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. The BS may support one or more cells. BS 110 communicates with user equipment (UE) 120a-y (each also individually referred to herein as UE 120 or collectively referred to as UE 120) in the wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.

[0046] According to certain aspects, BS 110 and UE 120 may be configured to trigger state activation and updating. Figure 1 As shown in FIG. 1 , BS 110a includes a trigger state manager 112. According to aspects of the present disclosure, the trigger state manager 112 may be configured to use DCI to activate one of the configured trigger states or dynamically update one or more parameters of at least one of the trigger states. Figure 1 As shown in FIG. 1 , UE 120a includes a trigger state manager 122. According to aspects of the present disclosure, the trigger state manager 122 may be configured to use DCI to activate one of the configured trigger states or dynamically update one or more parameters of at least one of the trigger states.

[0047] The wireless communication network 100 may also include a relay station (e.g., relay station 110r) (also referred to as a relay, etc.), which receives transmissions of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and sends transmissions of data and / or other information to a downstream station (e.g., UE 120 or BS 110), or the relay station relays transmissions between UEs 120 to facilitate communication between the devices.

[0048] A network controller 130 may couple to a set of BSs 110 and provide coordination and control for the BSs 110. The network controller 130 may communicate with the BSs 110 via a backhaul. The BSs 110 may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0049] Figure 2 1 and 120a (eg, in the example embodiment of the present invention) that can be used to implement various aspects of the present disclosure. Figure 1 Example components of the wireless communication network 100).

[0050] At BS 110a, a transmit processor 220 may receive data from a data source 212 and control information from a 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), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. The processor 220 may process (e.g., encode and symbol map) the data and the control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal (CRS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide an output symbol stream to modulators (MODs) 232a-232t. Each modulator 232 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 up-convert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0051] At UE 120a, antennas 252a-252r may receive downlink signals from BS 110a and may provide received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all demodulators 254a-254r, perform MIMO detection on the received symbols where 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 120a to a data sink 260, and provide decoded control information to a controller / processor 280.

[0052] On the uplink, at the UE 120a, the transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a 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., a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by a demodulator in a transceiver 254a-254r (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At the BS 110a, the uplink signal from the UE 120a may be received by the antenna 234, processed by the modulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120a. Receive processor 238 may provide decoded data to data sink 239 and decoded control information to controller / processor 240 .

[0053] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively.A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0054] The controller / processor 280 and / or other processors and modules at the UE 120a may perform or direct the execution of processes for the techniques described herein. Figure 2 As shown in FIG. 1 , according to various aspects described herein, the controller / processor 240 of the BS 110a has a trigger state manager 112 that can be configured to use DCI to activate one of the configured trigger states or dynamically update one or more parameters of at least one of the trigger states. Figure 2 As shown in , according to various aspects described herein, the controller / processor 280 of the UE 120a has a trigger state manager 122, which can be configured to use DCI to activate one of the configured trigger states or dynamically update one or more parameters of at least one of the trigger states. Although shown as being at the controller / processor, other components of the UE 120a and the BS 110a can also be used to perform the operations described herein.

[0055] Figure 3300 is a diagram showing an example of a frame format 300 for NR. The transmission timeline for each of the downlink and uplink 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 with indices 0 to 9, each subframe being 1 ms. Each subframe may include a variable number of slots, depending on the subcarrier spacing. 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 to the symbol period in each slot. A mini slot (which may be referred to as a subslot structure) refers to a transmission time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols).

[0056] Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction for each subframe may be switched dynamically. The link direction may be based on the slot format. Each slot may include DL / UL data and DL / UL control information.

[0057] In NR, a synchronization signal (SS) block is transmitted. The SS block includes PSS, SSS, and two-symbol PBCH. The SS block can be in a fixed time slot position (such as Figure 3 ) is transmitted in the codewords 0-3 shown in . PSS and SSS can be used by UE for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identity. PBCH carries some basic system information, such as downlink system bandwidth, timing information within a radio frame, SS burst set periodicity, system frame number, etc. SS blocks can be organized into SS bursts to support beam sweeping. Further system information (such as remaining minimum system information (RMSI), system information block (SIB), other system information (OSI)) can be transmitted on the physical downlink shared channel (PDSCH) in certain subframes. SS blocks can be transmitted up to 64 times, for example, for mmW, up to 64 different beam directions are used to transmit. Up to 64 transmissions of SS blocks are called SS burst sets. SS blocks in SS burst sets are transmitted in the same frequency region, while SS blocks in different SS burst sets can be transmitted at different frequency positions.

[0058] A control resource set (CORESET) for a system (such as NR and LTE systems) may include one or more control resource (e.g., time and frequency resource) sets configured within the system bandwidth for communicating PDCCH. Within each CORESET, one or more search spaces (e.g., common search space (CSS), UE-specific search space (USS), etc.) may be defined for a given UE. According to various aspects of the present disclosure, a CORESET is a time-frequency domain resource set defined in units of resource element groups (REGs). Each REG may include a fixed number (e.g., twelve) of frequency tones in a symbol period (e.g., a symbol period of a time slot), where one frequency tone in one symbol period is referred to as a resource element (RE). A fixed number of REGs may be included in a control channel element (CCE). A CCE set may be used to transmit a new radio PDCCH (NR-PDCCH), where different numbers of CCEs in the set are used to transmit NR-PDCCH using different aggregation levels. Multiple CCE sets may be defined as a search space for a UE, and thereby a Node B or other base station may transmit the NR-PDCCH to the UE by transmitting the NR-PDCCH in a CCE set that is a decoding candidate within the search space defined as the UE, and the UE may receive the NR-PDCCH by searching in the search space for the UE and decoding the NR-PDCCH transmitted by the Node B.

[0059] Example method for DCI-based trigger state activation and dynamic trigger state update

[0060] Various aspects of the present disclosure provide apparatus (device), method, processing system and computer-readable medium for trigger state activation based on downlink control information (DCI) for reporting channel state information (CSI)-reference signal (RS) feedback. Various CSI-RS trigger states can be configured by a base station (BS) using a radio access control (RRC) configuration. For example, for aperiodic CSI, the CSI-AperiodicTriggerStateList (CSI-aperiodic trigger state list) field can be used to configure the UE with an aperiodic trigger state list using RRC signaling. The trigger state can indicate information such as how to report CSI-RS measurement results via an information element (IE) (e.g., indicating which beam to use or which resource set to use by indicating a resource set ID). The trigger state can also indicate the type of CSI-RS to be transmitted (e.g., non-zero power (NZP) CSI-RS or interference management (IM) CSI-RS). The trigger status may indicate quasi co-location (QCL) information, which may indicate which beam is used for transmission of the CSI-RS, thereby allowing the UE to receive the CSI-RS more efficiently.

[0061] As described herein, the trigger state list can be configured by RRC signaling. In some implementations, the CSI-RS trigger state can be activated using a media access control (MAC)-control element (CE), which can introduce an activation wait time (e.g., 3 milliseconds) for the UE to apply the activation command. Certain aspects of the present disclosure relate to trigger state activation based on DCI. For example, CSI-RS trigger state activation can be performed via DCI. Trigger state activation can be performed using a new DCI format or an existing DCI format (e.g., format 0_1 ​​or 0_2) using reserved bits or configurable new fields. In some aspects, an ACK (ACK) / NAK for receiving DCI can be sent by the UE in an uplink (UL) (e.g., via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH)).

[0062] In certain aspects, a UE may report whether the UE supports DCI-based triggered state activation. In this case, the transmission of the DCI activating the triggered state may be in response to the UE's indication that the UE supports DCI-based triggered state activation. In some cases, the BS may indicate to the UE via RRC, MAC-CE, and / or DCI that DCI-based triggered state activation is enabled.

[0063] Figure 4 4 is a flow diagram illustrating example operations 400 for wireless communications in accordance with certain aspects of the present disclosure. Operations 400 may be performed, for example, by a BS, such as BS 110a in wireless communication network 100, for example.

[0064] Operation 400 may be implemented as a processor on one or more processors (e.g., Figure 2 In addition, the transmission and reception of signals by the BS in operation x00 may be performed by one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the BS may be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (eg, controller / processor 240).

[0065] Operations 400 may begin at block 405, where the BS transmits a configuration of trigger states for CSI-RS reporting. At block 410, the BS transmits a first DCI that activates one of the trigger states. At block 415, the BS may optionally receive CSI processed according to the activated one of the trigger states (also referred to as "CSI-RS feedback"). In some aspects, the BS may transmit a message (e.g., a MAC-CE or a first DCI) that schedules reception of the CSI-RS using the activated one of the trigger states.

[0066] Figure 5 5 is a flow diagram illustrating example operations 500 for wireless communications, in accordance with certain aspects of the present disclosure. Operations 500 may be performed, for example, by a UE, such as UE 120a in wireless communication network 100, for example.

[0067] Operation 500 may be an operation performed by a UE that is complementary to operation 400 performed by a BS. Operation 500 may be implemented as a processor (eg, Figure 2 In addition, the transmission and reception of signals by the UE in operation 500 may be performed by one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the UE may be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (eg, controller / processor 280).

[0068] Operations 500 may begin at block 505, where the UE receives (e.g., via RRC signaling) configurations for trigger states for CSI-RS reporting (e.g., aperiodic CSI-RS reporting). At block 510, the UE may receive a first DCI that activates one of the trigger states. For example, the first DCI may indicate an index associated with the one of the trigger states. At block 515, the UE may receive CSI-RS according to the activated one of the trigger states, and at block 520, process the CSI-RS. For example, at block 525, the UE may optionally report CSI based on processing of the CSI-RS. In some aspects, the UE may also receive a message (e.g., a MAC-CE or a first DCI) that schedules reception of the CSI-RS using the activated one of the trigger states.

[0069] In some aspects, the UE may generate a message (e.g., PUCCH or PUSCH) confirming the reception of a first DCI that activates one of the triggered states, and transmit the message to the BS. In some aspects, the UE may transmit an indication that the UE supports DCI-based triggered state activation. In this case, the reception of the first DCI that activates one of the triggered states at box 510 may be in response to support for DCI-based triggered state activation. In some aspects, operation 500 may also include receiving an indication that DCI-based triggered state activation is enabled. In this case, the reception of the first DCI that activates one of the triggered states at box 510 may be in response to an indication that DCI-based triggered state activation is enabled. In some cases, the indication that DCI-based triggered state activation is enabled may be received via RRC signaling, a MAC-CE message, or a second DCI (e.g., different from or the same as the first DCI).

[0070] Certain aspects of the present disclosure relate to dynamic trigger state updates. As described herein, the current trigger state content (list) may be RRC configurable, but the maximum number of configurable trigger states (e.g., 64) may be too low for certain use cases. For example, P2 beamforming (e.g., AP transmit (Tx) antenna beamforming), P3 beamforming (e.g., UE receive (Rx) antenna beamforming), tracking reference signal (TRS) operation, or any combination thereof may be associated with different trigger states, resulting in a large number of trigger states, particularly when the base station has a large number of transmit beams. Increasing the maximum number of configurable trigger states may increase UE memory and complexity because the UE must prepare the corresponding (s) non-periodic (AP)-CSI-RS Rx beams after a short trigger offset.

[0071] Certain aspects of the present disclosure relate to dynamic trigger state updates. For example, the content of each of one or more trigger states may be dynamically updated by MAC-CE or DCI to reduce latency. For example, instead of configuring a new trigger state via RRC signaling, specific parameters of the configured trigger state may be dynamically updated via MAC-CE, DCI, or both. For example, the CSI-RS resource set ID and / or per-resource QCL of one or more trigger states may be updated. As an example, when the UE is mobile, the applicable beam used to communicate with the UE may change rapidly. Therefore, the BS may use dynamic signaling (e.g., DCI or MAC-CE) to dynamically update the beam used for CSI-RS reporting, as described herein.

[0072] In some aspects, an ACK / NACK for receiving an update to one or more triggered states may be sent by the UE in the UL (e.g., via PUCCH or PUSCH). In some aspects, the UE may report whether the UE supports dynamic triggered state updates. In this case, the updated transmission may be in response to an indication by the UE that the UE supports dynamic triggered state updates. In some cases, the BS may indicate to the UE via RRC, MAC-CE, and / or DCI that dynamic triggered state updates are enabled.

[0073] Figure 6 6 is a flow diagram illustrating example operations 600 for wireless communications, in accordance with certain aspects of the present disclosure. Operations 600 may be performed, for example, by a BS, such as BS 110a in wireless communication network 100, for example.

[0074] Operation 600 may be implemented as a processor on one or more processors (e.g., Figure 2 In addition, the transmission and reception of signals by the BS in operation 600 may be performed by one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the BS may be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (eg, controller / processor 240).

[0075] Operations 600 may begin at block 605, where the BS transmits a configuration of trigger states for CSI-RS reporting. At block 610, the BS transmits an indication of an update of one or more parameters for at least one of the trigger states. At block 615, the BS may optionally receive CSI processed according to the at least one of the trigger states with the updated one or more parameters. In some aspects, the BS may transmit a message (e.g., MAC-CE or DCI) scheduling reception of the CSI-RS.

[0076] Figure 7 7 is a flow diagram illustrating example operations 700 for wireless communications in accordance with certain aspects of the present disclosure. Operations 700 may be performed, for example, by a UE, such as UE 120a in wireless communication network 100, for example.

[0077] Operation 700 may be an operation performed by a UE that is complementary to operation 600 performed by a BS. Operation 700 may be implemented as a processor (eg, Figure 2 In addition, the transmission and reception of signals by the UE in operation 700 may be performed by one or more antennas (e.g., Figure 2In some aspects, the transmission and / or reception of signals by the UE may be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (eg, controller / processor 280).

[0078] Operations 700 may begin at block 705, where the UE receives configurations of trigger states for CSI-RS reporting (e.g., aperiodic CSI-RS reporting). In some aspects, the configurations of the trigger states are received via radio resource control (RRC) signaling. At block 710, the UE may receive an indication of an update to one or more parameters (e.g., resource set ID and / or per-resource QCL) for at least one of the trigger states. In some aspects, the indication of the update to the one or more parameters is received via at least one of a DCI, a MAC-CE, or a combination thereof. At block 715, the UE may receive a CSI-RS according to the at least one of the trigger states having the updated one or more parameters; and at block 720, process the CSI-RS. In some aspects, at block 725, the UE may optionally report CSI based on processing of the CSI-RS. In some aspects, the UE may receive a message (e.g., a MAC-CE or a DCI) that schedules reception of the CSI-RS.

[0079] In some aspects, the UE may generate a message (e.g., PUCCH or PUSCH) acknowledging receipt of the update of the one or more parameters and transmit the message. In some aspects, the UE may transmit an indication that the UE supports dynamic triggered state updates, and the receipt of the update of the one or more parameters for the at least one of the triggered states is responsive to the support of dynamic triggered state updates.

[0080] In certain aspects, the UE may receive an indication that dynamic triggered state updates are enabled, and the receiving of updates to one or more parameters for at least one of the triggered states is responsive to the indication that dynamic triggered state updates are enabled. In certain implementations, the indication that dynamic triggered state updates are enabled may be received via RRC signaling, a MAC-CE message, or a DCI.

[0081] Figure 88 is a call flow diagram illustrating example operations 800 for trigger state activation and updating in accordance with certain aspects of the present disclosure. As illustrated, a BS 804 (e.g., corresponding to BS 110) may transmit an RRC message 806 that configures the trigger states. At block 808, a UE 802 may store the trigger states and receive a DCI 810 that activates one of the trigger states. The UE may transmit an ACK / NACK 812 for the DCI 810 via a PUCCH or a PUSCH, as described herein.

[0082] The UE may then receive CSI-RS 813 according to the activated trigger state and process the CSI-RS 813. For example, the UE may perform CSI-RS measurements 814. In some aspects, the UE may optionally report CSI-RS feedback 816 (e.g., CSI) according to the activated trigger state.

[0083] In certain aspects, the configured trigger states may be updated in a dynamic manner, as described herein. For example, the UE may receive a trigger state parameter update message 818 to update one or more parameters of at least one of the trigger states. The trigger state parameter update message 818 may be a DCI or a MAC-CE. The UE may optionally transmit an ACK / NACK 820 for the trigger state parameter update message 818. The UE may receive a CSI-RS 821 and perform a CSI-RS measurement 822, as illustrated. Optionally, the UE may also report CSI-RS feedback 824 based on the updated trigger state.

[0084] Fig. 9 The following describes operations that may include being configured to perform the techniques disclosed herein (such as Figure 4 and 6 900 includes various components (e.g., corresponding to means-plus-function components) of the communication device 900 and the operations explained in the foregoing. The communication device 900 includes a processing system 902 coupled to a transceiver 908. The transceiver 908 is configured to transmit and receive signals (such as the various signals described herein) for the communication device 900 via an antenna 910. The processing system 902 may be configured to perform processing functions for the communication device 900, including processing signals received and / or to be transmitted by the communication device 900.

[0085] The processing system 902 includes a processor 904 coupled to a computer readable medium / memory 912 via a bus 906. In some aspects, the computer readable medium / memory 912 is configured to store programs that, when executed by the processor 904, cause the processor 904 to execute Figure 4 and 6The operations illustrated in or instructions (e.g., computer executable code) for performing other operations of the various techniques for DCI-based trigger state activation or dynamic trigger state update discussed herein.

[0086] In some aspects, the computer-readable medium / memory 912 stores one or any combination of: code 914 (e.g., an example of a device for transmitting / receiving) for transmitting / receiving (e.g., receiving or transmitting CSI-RS); code 916 (e.g., an example of a device for generating); code 918 (e.g., an example of a device for reporting) for reporting (e.g., reporting CSI) and code 919 (e.g., an example of a device for processing) for processing (e.g., processing CSI-RS). One or more of the codes 914, 916, 918, 919 may be executed by 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. In some aspects, the processor 904 executes the code stored in the computer-readable medium / memory 912. In some aspects, the computer-readable medium / memory 912 is an example of a trigger state manager 112 or 122.

[0087] In some aspects, alternatively or additionally, the processor 904 includes one or any combination of: a circuit system 920 (e.g., an example of a device for transmitting / receiving) for transmitting / receiving (e.g., receiving or transmitting CSI-RS); a circuit system 924 (e.g., an example of a device for generating); and a circuit system 926 (e.g., an example of a device for reporting) for reporting (e.g., reporting CSI); and a circuit system 928 (e.g., an example of a device for processing) for processing (e.g., processing CSI-RS). One or more of the circuit systems 920, 924, 926, 928 may be implemented by one or more of 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 devices. In some aspects, the processor 904 is an example of a trigger state manager 112 or 122.

[0088] The transceiver 908 may provide a means for receiving information or signals such as CSI-RS or CSI. The information may be communicated to other components of the device 900. The transceiver 908 may be a reference Figure 2 Examples of various aspects of the transceiver 254 are described. Antenna 910 may correspond to a single antenna or a group of antennas. Transceiver 908 may provide a means for transmitting signals generated by other components of device 900.

[0089] Fig.10The following describes operations that may include being configured to perform the techniques disclosed herein (such as Figure 5 and 7 1000 includes a communication device 1000 that includes various components (e.g., corresponding to means-plus-function components) of the operations illustrated in 1002. The communication device 1000 includes a processing system 1002 coupled to a transceiver 1008. The transceiver 1008 is configured to transmit and receive signals (such as the various signals described herein) for the communication device 1000 via an antenna 1010. The processing system 1002 may be configured to perform processing functions for the communication device 1000, including processing signals received and / or to be transmitted by the communication device 1000.

[0090] The processing system 1002 includes a processor 1004 coupled to a computer readable medium / memory 1012 via a bus 1006. In some aspects, the computer readable medium / memory 1012 is configured to store programs that, when executed by the processor 1004, cause the processor 1004 to execute Figure 5 and 7 The operations illustrated in or instructions (e.g., computer executable code) for performing other operations of the various techniques for DCI-based trigger state activation or dynamic trigger state update discussed herein.

[0091] In some aspects, the computer-readable medium / memory 1012 stores one or any combination of the following: code 1014 (e.g., an example of an apparatus for transmitting / receiving) for transmitting / receiving (e.g., receiving or transmitting CSI-RS); code 1016 (e.g., an example of an apparatus for generating); code 1018 (e.g., an example of an apparatus for reporting) for reporting (e.g., reporting CSI) and code 10110 (e.g., an example of an apparatus for processing) for processing (e.g., processing CSI-RS). One or more of the codes 1014, 1016, 1018, 10110 may be executed by 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. In some aspects, the processor 1004 executes the code stored in the computer-readable medium / memory 1012. In some aspects, the computer-readable medium / memory 1012 is an example of a trigger state manager 112 or 122.

[0092] In some aspects, alternatively or additionally, the processor 1004 includes one or any combination of: a circuit system 1020 (e.g., an example of a device for transmitting / receiving) for transmitting / receiving (e.g., receiving or transmitting CSI-RS); a circuit system 1024 (e.g., an example of a device for generating); and a circuit system 1026 (e.g., an example of a device for reporting) for reporting (e.g., reporting CSI); and a circuit system 1028 (e.g., an example of a device for processing) for processing (e.g., processing CSI-RS). One or more of the circuit systems 1020, 1024, 1026, 1028 may be implemented by one or more of 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 devices. In some aspects, the processor 1004 is an example of a trigger state manager 112 or 122.

[0093] The transceiver 1008 may provide a means for receiving information or signals such as CSI-RS or CSI. The information may be communicated to other components of the device 1000. The transceiver 1008 may be a reference Figure 2 Examples of various aspects of the transceiver 254 are described. Antenna 1010 may correspond to a single antenna or a group of antennas. Transceiver 1008 may provide a means for transmitting signals generated by other components of device 1000.

[0094] According to examples disclosed herein, the trigger state manager 112 or 122 can support wireless communications.

[0095] The trigger state manager 112 or 122 may be an example of a device for performing various aspects described herein. The trigger state manager 112 or 122 or its subcomponents may be implemented in hardware (e.g., in a trigger state management circuit system). The circuit system may include a processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0096] In another implementation, the trigger state manager 112 or 122 or its subcomponents may be implemented in code executed by a processor (e.g., as trigger state management software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the trigger state manager 112 or 122 or its subcomponents may be performed by 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.

[0097] In some examples, trigger state manager 112 or 122 may be configured to use or otherwise cooperate with transceiver 908 to perform various operations (eg, receive, determine, transmit).

[0098] The trigger state manager 112 or 122 or its subcomponents may be physically located at various locations, including being distributed so that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the trigger state manager 112 or 122 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the trigger state manager 112 or 122 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof).

[0099] Example aspects

[0100] Aspect 1. A method for wireless communication by a user equipment (UE), comprising: receiving a configuration of trigger states for channel state information (CSI)-reference signal (RS) reception; receiving first downlink control information (DCI) activating one of the trigger states; receiving a CSI-RS according to the activated one of the trigger states; and processing the CSI-RS.

[0101] Aspect 2: The method of aspect 1 further comprises reporting CSI based on processing of CSI-RS.

[0102] Aspect 3. The method according to any one of aspects 1 to 2, further comprising receiving a message for scheduling reception of a CSI-RS using one of the trigger states being activated.

[0103] Aspect 4. The method of any one of aspects 1 to 3, further comprising: generating a message confirming receipt of the first DCI activating one of the triggering states; and transmitting the message.

[0104] Aspect 5. The method of any one of aspects 1 to 4, further comprising: transmitting an indication that the UE supports DCI-based trigger state activation, wherein the reception of the first DCI activating one of the trigger states is in response to the support of the DCI-based trigger state activation.

[0105] Aspect 6. The method of any one of aspects 1 to 5 further comprises: receiving an indication that DCI-based trigger state activation is enabled, wherein the receiving of the first DCI activating one of the trigger states is in response to the indication that DCI-based trigger state activation is enabled.

[0106] Aspect 7. The method of aspect 6, wherein the indication that the DCI-based triggered state activation is enabled is received via RRC signaling, a MAC-CE message, or a second DCI.

[0107] Aspect 8. The method according to Aspect 7, wherein the second DCI is different from the first DCI.

[0108] Aspect 9. The method of any one of aspects 4 to 8, wherein the message is transmitted via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0109] Aspect 10. The method of any one of Aspects 1 to 9, wherein the CSI-RS report comprises an aperiodic CSI-RS report.

[0110] Aspect 11. The method of any one of Aspects 1 to 10, wherein the first DCI indicates an index associated with the one of the triggering states.

[0111] Aspect 12. The method of any one of aspects 1 to 10, wherein the configuration of the trigger state is received via radio resource control (RRC) signaling.

[0112] Aspect 13. A method for wireless communication, comprising: transmitting a configuration of triggering states for channel state information (CSI)-reference signal (RS) reporting; and transmitting first downlink control information (DCI) activating one of the triggering states.

[0113] Aspect 14. The method of aspect 13, further comprising receiving CSI processed according to one of the trigger states being activated.

[0114] Aspect 15. The method of any one of Aspects 13 to 14, further comprising transmitting a message for scheduling reception of the CSI-RS using one of the triggered states being activated.

[0115] Aspect 16. The method of any one of aspects 13 to 15, further comprising receiving a message confirming receipt of the first DCI activating one of the triggering states.

[0116] Aspect 17. The method of any one of aspects 13 to 16, further comprising: receiving an indication that a user equipment (UE) supports DCI-based trigger state activation, wherein the transmission of the first DCI to activate one of the trigger states is in response to the support of the DCI-based trigger state activation.

[0117] Aspect 18. The method of any one of aspects 13 to 17, further comprising: transmitting an indication that DCI-based trigger state activation is enabled, wherein the transmission of the first DCI to activate one of the trigger states is in response to the indication that DCI-based trigger state activation is enabled.

[0118] Aspect 19. The method of aspect 18, wherein the indication that the DCI-based triggered state activation is enabled is transmitted via RRC signaling, a MAC-CE message, or a second DCI.

[0119] Aspect 20. The method of Aspect 19, wherein the second DCI is different from the first DCI.

[0120] Aspect 21. The method of aspect 16, wherein the message is received via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0121] Aspect 22. The method of any one of Aspects 13 to 21, wherein the CSI-RS report comprises an aperiodic CSI-RS report.

[0122] Aspect 23. The method of any one of Aspects 13 to 22, wherein the first DCI indicates an index associated with the one of the triggering states.

[0123] Aspect 24. The method of any one of aspects 13 to 23, wherein the configuration of the trigger state is received via radio resource control (RRC) signaling.

[0124] Aspect 25. A method for wireless communication by a user equipment (UE), comprising: receiving a configuration of triggering states for channel state information (CSI)-reference signal (RS) reporting; receiving an indication of an update of one or more parameters for at least one of the triggering states; receiving a CSI-RS according to the at least one of the triggering states having the updated one or more parameters; and processing the CSI-RS.

[0125] Aspect 26. The method of Aspect 25, further comprising reporting CSI based on processing of the CSI-RS.

[0126] Aspect 27. The method of any one of Aspects 25 to 26, further comprising receiving a message for scheduling reception of a CSI-RS.

[0127] Aspect 28. The method of any one of Aspects 25 to 27, wherein the one or more parameters include at least one of a CSI-RS resource set ID, a quasi co-location per resource (QCL), or any combination thereof.

[0128] Aspect 29. The method of any of Aspects 25-28, further comprising: generating a message acknowledging receipt of the update of the one or more parameters; and transmitting the message.

[0129] Aspect 30. The method of any one of aspects 25 to 29, further comprising: transmitting an indication that the UE supports dynamic triggered status updates, wherein the receiving of an update of one or more parameters for at least one of the triggered states is in response to the support of dynamic triggered status updates.

[0130] Aspect 31. The method of any one of aspects 25 to 30, further comprising: receiving an indication that dynamic triggered state updates are enabled, wherein the receiving of an update of one or more parameters for at least one of the triggered states is responsive to the indication that dynamic triggered state updates are enabled.

[0131] Aspect 32. The method of aspect 31, wherein the indication that the dynamically triggered status update is enabled is received via RRC signaling, a MAC-CE message, or a DCI.

[0132] Aspect 33. The method of any one of aspects 29 to 32, wherein the message is transmitted via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0133] Aspect 34. The method of any one of aspects 25 to 33, wherein the indication of the update of the one or more parameters is received via at least one of downlink control information (DCI), medium access control (MAC)-control element (CE), or a combination thereof.

[0134] Aspect 35. The method of any one of Aspects 25 to 34, wherein the CSI-RS report comprises an aperiodic CSI-RS report.

[0135] Aspect 36. The method of any one of Aspects 25 to 35, wherein the configuration of the trigger state is received via radio resource control (RRC) signaling.

[0136] Aspect 37. A method for wireless communication, comprising: transmitting a configuration of triggering states for channel state information (CSI)-reference signal (RS) reporting; and transmitting an indication of an update of one or more parameters for at least one of the triggering states.

[0137] Aspect 38. The method of aspect 37, further comprising receiving CSI processed according to the at least one of the triggering states having the updated one or more parameters.

[0138] Aspect 39. The method of any one of Aspects 37 to 38, further comprising transmitting a message scheduling reception of the CSI-RS.

[0139] Aspect 40. The method of any one of aspects 37 to 39, further comprising: receiving an indication that the UE supports dynamic triggered status updates, wherein the transmission of updates to one or more parameters for at least one of the triggered states is in response to the support for dynamic triggered status updates.

[0140] Aspect 41. The method of any one of aspects 37 to 40, further comprising: transmitting an indication that dynamic triggered state updating is enabled, wherein the transmission of an update to one or more parameters for at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

[0141] Aspect 42. The method of aspect 41, wherein the indication that the dynamically triggered status update is enabled is received via RRC signaling, a MAC-CE message, or a DCI.

[0142] Aspect 43. The method of any one of Aspects 37 to 42, wherein the one or more parameters include at least one of a CSI-RS resource set ID, a quasi co-location per resource (QCL), or any combination thereof.

[0143] Aspect 44. The method of any one of Aspects 37 to 43, further comprising receiving a message confirming receipt of the update of the one or more parameters.

[0144] Aspect 45. The method of aspect 44, wherein the message is received via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0145] Aspect 46. The method of any one of aspects 37 to 45, wherein the indication of the update of the one or more parameters is received via at least one of downlink control information (DCI), medium access control (MAC)-control element (CE), or a combination thereof.

[0146] Aspect 47. The method of any one of Aspects 37 to 46, wherein the CSI-RS report comprises an aperiodic CSI-RS report.

[0147] Aspect 48. The method of any one of Aspects 37 to 47, wherein the configuration of the trigger state is received via radio resource control (RRC) signaling.

[0148] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is typically (interchangeably) referred to as the “sub-6 GHz band” in various documents and articles. Similar naming issues sometimes arise regarding FR2, which is typically (interchangeably) referred to as the “millimeter wave” band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0149] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used in this document, the term sub-"6GHz" and the like can broadly refer to frequencies that can be less than 6GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if used in this document, the term "millimeter wave" and the like can broadly refer to frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0150] The techniques described herein may be used for various wireless communication technologies, such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Advanced LTE (LTE-A), 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), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often 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 variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network may implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0151] The techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, although various aspects may be described herein using terms commonly associated with 3G, 4G or 5G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations.

[0152] In 3GPP, the term "cell" may refer to the coverage area of ​​a B node (NB) or a NB subsystem serving the coverage area, depending on the context in which the term is used. In NR systems, the term "cell" and BS, next-generation B node (gNB or g B node), access point (AP), distributed unit (DU), carrier, or transmission reception point (TRP) may be used interchangeably. The BS may provide communication coverage for macro cells, pico cells, femto cells, or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several thousand meters) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a residence, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS.

[0153] UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable device (such as smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio, etc.), transportation component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via 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, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity for or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, 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.

[0154] Some wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also often referred to as frequency modulation, frequency bins, etc. Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain for OFDM and in the time domain for SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the spacing of the subcarriers can be 15kHz, and the minimum resource allocation (called a "resource block" (RB)) can be 12 subcarriers (or 180kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal fast Fourier transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth may also be divided into subbands. For example, a subband may cover 1.8 MHz (e.g., 6 RBs), and there may be 1, 2, 4, 8, or 16 subbands for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, respectively. In LTE, the basic transmission time interval (TTI) or packet duration is a 1 ms subframe.

[0155] NR can utilize OFDM with CP on the uplink and downlink and includes support for half-duplex operation using TDD. In NR, a subframe is still 1ms, but the basic TTI is called a time slot. A subframe contains a variable number of time slots (e.g., 1, 2, 4, 8, 16...time slots), depending on the subcarrier spacing. NR RB is 12 consecutive frequency subcarriers. NR can support a base subcarrier spacing of 15KHz, and other subcarrier spacings can be defined relative to the base subcarrier spacing, such as 30kHz, 60kHz, 120kHz, 240kHz, etc. The symbol and time slot lengths scale with the subcarrier spacing. The CP length also depends on the subcarrier spacing. Beamforming can be supported and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. In some examples, the MIMO configuration in the DL can support up to 8 transmit antennas (multi-layer DL transmission with up to 8 streams) and up to 2 streams per UE. In some examples, multi-layer transmission of up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported using up to 8 serving cells.

[0156] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., BS) allocates resources for communication between some or all devices and equipment within its service area or cell. A 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 utilize resources allocated by the scheduling entity. A base station is not the only entity that can be used as a scheduling entity. In some examples, a UE may act as a scheduling entity, and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs may utilize resources scheduled by the UE for wireless communication. In some examples, a UE may act as a scheduling entity in a peer-to-peer (P2P) network or in a mesh network. In a mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

[0157] As used herein, the term "determining" may encompass one or more of 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), assuming, and the like. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Also, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0158] As used herein, unless explicitly indicated otherwise, "or" is intended to be interpreted in an inclusive sense. For example, "a or b" may include only a, only b, or a combination of a and b. As used herein, a phrase that refers to "at least one of" or "one or more of" a list of items refers to any combination of those items, including individual members. For example, "at least one of a, b, or c" is intended to cover the following possibilities: only a, only b, only c, a combination of a and b, a combination of a and c, a combination of b and c, and a combination of a, b, and c.

[0159] The various illustrative components, logic, logic blocks, modules, circuits, operations, and algorithmic processes described in conjunction with the implementations disclosed herein may be implemented as electronic hardware, firmware, software, or a combination of hardware, firmware, or software, including the structures disclosed in this specification and their structural equivalents. This interchangeability of hardware, firmware, and software has been generally described in terms of their functionality and is illustrated in the various illustrative components, blocks, modules, circuits, and processes described above. Whether such functionality is implemented in hardware, firmware, or software depends on the specific application and the design constraints imposed on the overall system.

[0160] Various modifications to the implementations described in this disclosure may be apparent to those of ordinary skill in the art, and the universal principles defined herein may be applied to other implementations without departing from the spirit or scope of the disclosure. Thus, the claims are not intended to be limited to the implementations shown herein, but should be granted the widest scope consistent with the disclosure, the principles and novel features disclosed herein.

[0161] In addition, various features described in this specification in the context of separate implementations may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented in multiple implementations separately or in any suitable subcombination. Thus, while features may be described above as functioning in a particular combination and even initially claimed as such, one or more features from a claimed combination may in some cases be removed from the combination, and a claimed combination may be directed to a subcombination, or a variation of a subcombination.

[0162] Similarly, although operations are depicted in a particular order in the accompanying drawings, this should not be understood as requiring such operations to be performed in the particular order shown or in a sequential order, or to perform all the illustrated operations to achieve the desired result. In addition, the accompanying drawings may schematically depict one or more example processes in the form of a flow chart or a flow diagram. However, other operations that are not depicted may be incorporated into the example processes schematically illustrated. For example, one or more additional operations may be performed before, after, simultaneously or between any illustrated operations. In some environments, multitasking and parallel processing may be advantageous. In addition, the separation of various system components in the implementation described above should not be understood as requiring such separation in all implementations, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: receiving a configuration of a trigger state for channel state information (CSI)-reference signal (RS) reception; receiving first downlink control information (DCI) activating one of the trigger states; receiving a CSI-RS according to one of the trigger states being activated; as well as processing the CSI-RS, Wherein the method further comprises: transmitting an indication that the UE supports DCI-based trigger state activation, wherein the reception of the first DCI activating the one of the trigger states is in response to the support of the DCI-based trigger state activation, or An indication that DCI-based trigger state activation is enabled is received, wherein the receiving of the first DCI to activate the one of the trigger states is in response to the indication that DCI-based trigger state activation is enabled.

2. The method of claim 1, further comprising reporting CSI based on processing of the CSI-RS. 3 . The method of claim 1 , further comprising receiving a message for scheduling reception of the CSI-RS using one of the trigger states that is activated.

4. The method of claim 1, further comprising: generating a message acknowledging receipt of the first DCI activating the one of the trigger states; as well as The message is transmitted.

5. The method of claim 1, wherein: The indication that the DCI-based triggered state activation is enabled is received via RRC signaling, a MAC-CE message, or a second DCI.

6. The method of claim 5, wherein: The second DCI is different from the first DCI.

7. The method of claim 4, wherein: The message is transmitted via the Physical Uplink Control Channel (PUCCH) or the Physical Uplink Shared Channel (PUSCH).

8. The method of claim 1, wherein: The CSI-RS reception includes aperiodic CSI-RS reception.

9. The method of claim 1, wherein: The first DCI indicates an index associated with the one of the trigger states.

10. The method of claim 1, wherein: The configuration of the trigger state is received via radio resource control (RRC) signaling.

11. A method for wireless communication, comprising: Transmitting a configuration of a triggering status for a channel state information (CSI)-reference signal (RS) report; as well as transmitting first downlink control information (DCI) activating one of the trigger states, Wherein the method further comprises: receiving an indication that a user equipment (UE) supports DCI-based trigger state activation, wherein the transmission of the first DCI to activate the one of the trigger states is in response to the support of the DCI-based trigger state activation, or An indication that DCI-based trigger state activation is enabled is transmitted, wherein the transmission of the first DCI that activates the one of the trigger states is responsive to the indication that DCI-based trigger state activation is enabled.

12. The method of claim 11, further comprising receiving CSI processed according to an activated one of the trigger states. 13 . The method of claim 11 , further comprising transmitting a message for scheduling reception of the CSI-RS using one of the trigger states that is activated.

14. The method of claim 11, further comprising receiving a message acknowledging receipt of the first DCI activating the one of the trigger states.

15. The method of claim 11, wherein: The indication that the DCI-based triggered state activation is enabled is transmitted via RRC signaling, a MAC-CE message or a second DCI.

16. The method of claim 15, wherein: The second DCI is different from the first DCI.

17. The method of claim 14, wherein: The message is received via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

18. The method of claim 11, wherein: The CSI-RS report includes an aperiodic CSI-RS report.

19. The method of claim 11, wherein: The first DCI indicates an index associated with the one of the trigger states.

20. The method of claim 11, wherein: The configuration of the trigger state is received via radio resource control (RRC) signaling.

21. A method for wireless communication by a user equipment (UE), comprising: receiving a configuration of a triggering state for a channel state information (CSI)-reference signal (RS) report; receiving an indication of an update to one or more parameters for at least one of the trigger states; receiving a CSI-RS according to the at least one of the triggering states having the updated one or more parameters; as well as processing the CSI-RS, Wherein the method further comprises: transmitting an indication that the UE supports dynamic triggered state updating, wherein the receiving of the update of the one or more parameters for the at least one of the triggered states is responsive to the support of dynamic triggered state updating, or An indication is received that dynamic triggered state updating is enabled, wherein the receiving of the update to the one or more parameters for the at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

22. The method of claim 21, further comprising reporting CSI based on processing of the CSI-RS.

23. The method of claim 21, further comprising receiving a message that schedules reception of the CSI-RS.

24. The method of claim 21, wherein: The one or more parameters include at least one of a CSI-RS resource set ID, quasi co-location per resource (QCL), or any combination thereof.

25. The method of claim 21, further comprising: generating a message acknowledging receipt of the update of the one or more parameters; as well as The message is transmitted.

26. The method of claim 21, wherein: The indication that the dynamically triggered status update is enabled is received via RRC signaling, a MAC-CE message or a DCI.

27. The method of claim 25, wherein: The message is transmitted via the Physical Uplink Control Channel (PUCCH) or the Physical Uplink Shared Channel (PUSCH).

28. The method of claim 21, wherein: The indication of the update of the one or more parameters for the at least one of the triggered states is received via at least one of downlink control information (DCI), medium access control (MAC)-control element (CE), or a combination thereof.

29. The method of claim 21, wherein: The CSI-RS report includes an aperiodic CSI-RS report.

30. The method of claim 21, wherein: The configuration of the trigger state is received via radio resource control (RRC) signaling.

31. A method for wireless communication, comprising: Transmitting a configuration of a triggering status for a channel state information (CSI)-reference signal (RS) report; as well as transmitting an indication of an update to one or more parameters for at least one of the trigger states, Wherein the method further comprises: receiving an indication that a user equipment (UE) supports dynamic triggered state updating, wherein the transmission of the update of the one or more parameters for the at least one of the triggered states is responsive to the support of dynamic triggered state updating, or An indication that dynamic triggered state updating is enabled is transmitted, wherein the transmission of the update to the one or more parameters for the at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

32. The method of claim 31 , further comprising receiving CSI processed according to the at least one of the triggering states having the updated one or more parameters.

33. The method of claim 31 , further comprising transmitting a message scheduling reception of the CSI-RS.

34. The method of claim 31, wherein: The indication that the dynamically triggered status update is enabled is received via RRC signaling, a MAC-CE message or a DCI.

35. The method of claim 31, wherein: The one or more parameters include at least one of a CSI-RS resource set ID, quasi co-location per resource (QCL), or any combination thereof.

36. The method of claim 31 , further comprising receiving a message acknowledging receipt of the update of the one or more parameters.

37. The method of claim 36, wherein: The message is received via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

38. The method of claim 31, wherein: The indication of the update of the one or more parameters is received via at least one of downlink control information (DCI), a medium access control (MAC)-control element (CE), or a combination thereof.

39. The method of claim 31, wherein: The CSI-RS report includes an aperiodic CSI-RS report.

40. The method of claim 31, wherein: The configuration of the trigger state is received via radio resource control (RRC) signaling.

41. An apparatus for wireless communication by a user equipment (UE), comprising: Memory; as well as one or more processors coupled to the memory, wherein the one or more processors are configured to: receiving a configuration of a trigger state for channel state information (CSI)-reference signal (RS) reception; receiving first downlink control information (DCI) activating one of the trigger states; receiving a CSI-RS according to one of the trigger states being activated; and processing the CSI-RS, wherein the one or more processors are further configured to: transmitting an indication that the UE supports DCI-based trigger state activation, wherein the reception of the first DCI activating the one of the trigger states is in response to the support of the DCI-based trigger state activation, or An indication that DCI-based trigger state activation is enabled is received, wherein the receiving of the first DCI to activate the one of the trigger states is in response to the indication that DCI-based trigger state activation is enabled.

42. An apparatus for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, wherein the one or more processors are configured to: transmitting a configuration of a triggering status for a channel state information (CSI)-reference signal (RS) report; and transmitting first downlink control information (DCI) activating one of the trigger states, wherein the one or more processors are further configured to: receiving an indication that a user equipment (UE) supports DCI-based trigger state activation, wherein the transmission of the first DCI to activate the one of the trigger states is in response to the support of the DCI-based trigger state activation, or An indication that DCI-based trigger state activation is enabled is transmitted, wherein the transmission of the first DCI that activates the one of the trigger states is responsive to the indication that DCI-based trigger state activation is enabled.

43. An apparatus for wireless communication by a user equipment (UE), comprising: Memory; as well as one or more processors coupled to the memory, wherein the one or more processors are configured to: receiving a configuration of a triggering state for a channel state information (CSI)-reference signal (RS) report; receiving an indication of an update to one or more parameters for at least one of the trigger states; receiving a CSI-RS according to the at least one of the triggering states having the updated one or more parameters; and processing the CSI-RS, wherein the one or more processors are further configured to: transmitting an indication that the UE supports dynamic triggered state updating, wherein the receiving of the update of the one or more parameters for the at least one of the triggered states is responsive to the support of dynamic triggered state updating, or An indication is received that dynamic triggered state updating is enabled, wherein the receiving of the update to the one or more parameters for the at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

44. An apparatus for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, wherein the one or more processors are configured to: transmitting a configuration of a triggering status for a channel state information (CSI)-reference signal (RS) report; and transmitting an indication of an update to one or more parameters for at least one of the trigger states, wherein the one or more processors are further configured to: receiving an indication that a user equipment (UE) supports dynamic triggered state updating, wherein the transmission of the update of the one or more parameters for the at least one of the triggered states is responsive to the support of dynamic triggered state updating, or An indication that dynamic triggered state updating is enabled is transmitted, wherein the transmission of the update to the one or more parameters for the at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

45. An apparatus for wireless communication by a user equipment (UE), comprising: means for receiving a configuration of a trigger state for channel state information (CSI)-reference signal (RS) reception; means for receiving first downlink control information (DCI) activating one of the trigger states; means for receiving a CSI-RS according to one of the trigger states being activated; as well as means for processing the CSI-RS, The device further comprises: means for transmitting an indication that the UE supports DCI-based trigger state activation, wherein the receipt of the first DCI activating the one of the trigger states is in response to support of DCI-based trigger state activation, or Means for receiving an indication that DCI-based trigger state activation is enabled, wherein the receipt of the first DCI to activate the one of the trigger states is in response to the indication that DCI-based trigger state activation is enabled.

46. ​​A device for wireless communication, comprising: means for transmitting a configuration of a triggering status for a channel state information (CSI)-reference signal (RS) report; as well as means for transmitting first downlink control information (DCI) activating one of said trigger states, The device further comprises: means for receiving an indication that a user equipment (UE) supports DCI-based trigger state activation, wherein the transmission of the first DCI to activate the one of the trigger states is in response to the support of the DCI-based trigger state activation, or Means for transmitting an indication that DCI-based trigger state activation is enabled, wherein the transmission of the first DCI to activate the one of the trigger states is responsive to the indication that DCI-based trigger state activation is enabled.

47. An apparatus for wireless communication by a user equipment (UE), comprising: means for receiving a configuration of a triggering state for a channel state information (CSI)-reference signal (RS) report; means for receiving an indication of an update to one or more parameters for at least one of the trigger states; means for receiving a CSI-RS according to the at least one of the triggering states having the updated one or more parameters; as well as means for processing the CSI-RS, The device further comprises: means for transmitting an indication that the UE supports dynamic triggered status updates, wherein the receiving of the update of the one or more parameters for the at least one of the triggered states is responsive to the support of dynamic triggered status updates, or Means for receiving an indication that dynamic triggered state updating is enabled, wherein receiving the update of the one or more parameters for the at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

48. A device for wireless communication, comprising: means for transmitting a configuration of a triggering status for a channel state information (CSI)-reference signal (RS) report; as well as means for transmitting an indication of an update of one or more parameters for at least one of said triggering states, The device further comprises: means for receiving an indication that a user equipment (UE) supports dynamic triggered state updates, wherein the transmission of the update of the one or more parameters for the at least one of the triggered states is responsive to the support of dynamic triggered state updates, or Means for transmitting an indication that dynamic triggered state updating is enabled, wherein the transmission of the update to the one or more parameters for the at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

49. A computer readable medium having stored thereon instructions that cause a user equipment (UE): receiving a configuration of a trigger state for channel state information (CSI)-reference signal (RS) reception; receiving first downlink control information (DCI) activating one of the trigger states; receiving a CSI-RS according to one of the trigger states being activated; and processing the CSI-RS, The instructions further cause the UE to: transmitting an indication that the UE supports DCI-based trigger state activation, wherein the reception of the first DCI activating the one of the trigger states is in response to the support of the DCI-based trigger state activation, or An indication that DCI-based trigger state activation is enabled is received, wherein the receiving of the first DCI to activate the one of the trigger states is in response to the indication that DCI-based trigger state activation is enabled.

50. A computer readable medium having stored thereon instructions that cause an apparatus to: transmitting a configuration of a triggering status for a channel state information (CSI)-reference signal (RS) report; and transmitting first downlink control information (DCI) activating one of the trigger states, The instructions further cause the device to: receiving an indication that a user equipment (UE) supports DCI-based trigger state activation, wherein the transmission of the first DCI to activate the one of the trigger states is in response to the support of the DCI-based trigger state activation, or An indication that DCI-based trigger state activation is enabled is transmitted, wherein the transmission of the first DCI that activates the one of the trigger states is responsive to the indication that DCI-based trigger state activation is enabled.

51. A computer readable medium having stored thereon instructions that cause a user equipment (UE): receiving a configuration of a triggering state for a channel state information (CSI)-reference signal (RS) report; receiving an indication of an update to one or more parameters for at least one of the trigger states; receiving a CSI-RS according to the at least one of the triggering states having the updated one or more parameters; and processing the CSI-RS, The instructions further cause the UE to: transmitting an indication that the UE supports dynamic triggered state updating, wherein the receiving of the update of the one or more parameters for the at least one of the triggered states is responsive to the support of dynamic triggered state updating, or An indication is received that dynamic triggered state updating is enabled, wherein the receiving of the update to the one or more parameters for the at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

52. A computer readable medium having stored thereon instructions that cause an apparatus to: transmitting a configuration of a triggering status for a channel state information (CSI)-reference signal (RS) report; and transmitting an indication of an update to one or more parameters for at least one of the trigger states, The instructions further cause the device to: receiving an indication that the apparatus supports dynamic triggered state updates, wherein the transmission of the update to the one or more parameters for the at least one of the triggered states is responsive to the support for dynamic triggered state updates, or An indication that dynamic triggered state updating is enabled is transmitted, wherein the transmission of the update to the one or more parameters for the at least one of the triggered states is responsive to the indication that dynamic triggered state updating is enabled.

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