Hysteretic selective temporal correlation reporting

Abstract

Certain aspects of the present disclosure provide a method for wireless communication at a user equipment (UE), the method generally including: receiving signaling that configures the UE to report a temporal correlation for a reference signal (RS) for a plurality of lags, where each lag represents a time interval between reference signals measured for the temporal correlation; and reporting a temporal correlation for a subset of the plurality of configured lags.

Description

background Technical Field

[0002] Aspects of the present disclosure relate to wireless communications and, more particularly, to techniques for hysteresis selective time correlation reporting.

[0003] Related technologies

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts or other similar types of services. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available wireless communication system resources with those users.

[0005] Although wireless communication systems have made tremendous technical progress over the years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Therefore, there is a continuous desire to improve the technical performance of wireless communication systems, including, for example: improving the speed and data carrying capacity of communications, improving the efficiency of using shared communication media, reducing the power used by transmitters and receivers when performing communications, improving the reliability of wireless communications, avoiding redundant transmission and / or reception and related processing, improving the coverage area of ​​wireless communications, increasing the number and types of devices that can access wireless communication systems, increasing the ability of different types of devices to communicate with each other, increasing the number and types of wireless communication media available for use, etc. Therefore, there is a need to further improve wireless communication systems to overcome the above-mentioned technical challenges and other challenges. Summary of the invention

[0006] One aspect provides a method for wireless communication at a user equipment (UE). The method includes: receiving signaling configuring the UE to report time correlation for a plurality of lags of a reference signal (RS), wherein each lag represents a time interval between reference signals measured for time correlation; and reporting time correlation for a subset of the plurality of configured lags.

[0007] In another aspect, a method for wireless communication at a network entity is provided. The method includes: sending signaling configuring a UE to report time correlation for multiple lags of an RS, wherein each lag represents a time interval between reference signals measured for time correlation; and receiving a report of time correlation for a subset of the multiple configured lags generated by the UE.

[0008] Other aspects provide: an apparatus operable to, configured to, or otherwise adapted to perform any one or more of the foregoing methods and / or those described elsewhere herein; a non-transitory computer-readable medium comprising instructions that, when executed by a processor of the apparatus, cause the apparatus to perform the foregoing methods and those described elsewhere herein; a computer program product embodied on a computer-readable storage medium, comprising code for performing the foregoing methods and those described elsewhere herein; and / or an apparatus comprising components for performing the foregoing methods and those described elsewhere herein. By way of example, an apparatus may include a processing system, a device having a processing system, or a processing system cooperating through one or more networks.

[0009] For purposes of illustration, the following description and drawings set forth certain features. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings depict certain features of the various aspects described herein and should not be considered to limit the scope of the disclosure.

[0011] Figure 1 An example wireless communication network is depicted.

[0012] Figure 2 An example disaggregated base station architecture is depicted.

[0013] Figure 3 Aspects of an example base station and example user equipment are depicted.

[0014] Figure 4A , Figure 4B , Figure 4C and Figure 4D Various example aspects of data structures for a wireless communication network are described.

[0015] Figure 5A and Figure 5B An example connected mode discontinuous reception (CDRX) timeline is depicted.

[0016] Figure 6 An example tracking reference signal (TRS) configuration is depicted.

[0017] Figure 7 is an example call flow diagram for delayed selective time correlation reporting in accordance with certain aspects of the present disclosure.

[0018] Fig. 8A and Figure 8B Depicted are examples for time-dependency reporting in accordance with certain aspects of the present disclosure.

[0019] Fig. 9Depicted are example quantizations for different time correlation lags in accordance with certain aspects of the present disclosure.

[0020] FIG. 10A to FIG. 10C

[0013] Options for supporting longer hysteresis in accordance with certain aspects of the present disclosure are depicted.

[0021] Fig.11 Depicted are example uses of timeline anchor time slots for lagged selective temporal correlation reporting in accordance with certain aspects of the present disclosure.

[0022] Fig.12 A method for wireless communication is described.

[0023] Fig.13 A method for wireless communication is described.

[0024] Fig.14 Aspects of an example communications device are depicted. DETAILED DESCRIPTION

[0025] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for hysteresis selective time correlation reporting.

[0026] In some scenarios, it may be beneficial to perform channel state reporting that indicates time correlation (correlation of channel measurements at different points in time). For example, time correlation reporting may be beneficial for user equipment (UE) traveling at certain speeds by utilizing time correlation / Doppler-domain information to assist downlink precoding.

[0027] In some cases, the UE may be configured to report time domain channel characteristics (TDCP) based on a channel state information reference signal (CSI-RS) for tracking, referred to as a tracking reference signal (TRS). TRS-based TDCP reporting may be based on a time domain correlation profile, for example, determined as correlation within one TRS resource or correlation across multiple TRS resources.

[0028] In some cases, the UE may be configured to report time correlation on one or more lags of the TRS resources, where the lag refers to the time distance between the measured TRSs. The lags may be within a TRS burst or different TRS bursts. When configured for multiple lags (multi-lag) time correlation reporting, the UE may need to measure TRSs across multiple bursts. For example, the UE is configured to report time correlation for M cross-burst lags, and the UE may need to measure at least M+1 TRS bursts.

[0029] Unfortunately, for some cases, the UE may not be able to obtain time correlation for all lags. For example, when discontinuous reception (DRX) is configured, TRS sent outside the DRX active time may not be received because the UE may be in a low power state. In addition, in some systems (e.g. NR Releases 15 to 17), it may be up to the UE to decide whether to receive a certain TRS burst / timeslot. Therefore, when the UE is configured for multi-lag time correlation reporting but is unable to obtain time correlation for all lags, there is some uncertainty in how the UE should behave.

[0030] Aspects of the present disclosure provide techniques that allow a UE to perform hysteresis selective time-dependency reporting. The techniques provide various mechanisms that allow a UE to perform time-dependency reporting only for a subset of hysteresis for which the UE is configured.

[0031] Potential advantages for these techniques include providing clarity about how a UE may behave when time correlation for certain lags is not available. In addition, by allowing the UE to report time correlation for available lags, the UE may be able to provide valuable feedback rather than not reporting at all. This feedback may result in more optimized downlink precoding, better system performance, and an improved overall user experience.

[0032] Introduction to wireless communication networks

[0033] The techniques and methods described herein can be used in various wireless communication networks. Although various aspects may be described herein using terms commonly associated with 3G, 4G and / or 5G wireless technologies, various aspects of the present disclosure may also be applicable to other communication systems and standards not explicitly mentioned herein.

[0034] Figure 1 An example of a wireless communication network 100 is depicted in which various aspects described herein may be implemented.

[0035] In general, the wireless communication network 100 includes various network entities (alternatively, network elements or network nodes). A network entity is typically a communication device and / or a communication function performed by a communication device (e.g., user equipment (UE), base station (BS), component of a BS, server, etc.). For example, various functions of a network and various devices associated with and interacting with the network may be considered network entities. In addition, the wireless communication network 100 includes ground aspects, such as ground-based network entities (e.g., BS 102), and non-ground aspects, such as satellites 140 and aircraft 145, which may include airborne network entities (e.g., one or more BSs) capable of communicating with other network elements (e.g., ground BSs) and user equipment.

[0036] In the depicted example, the wireless communication network 100 includes a BS 102, a UE 104, and one or more core networks (such as an evolved packet core (EPC) 160 and a 5G core (5GC) network 190) that interoperate to provide communication services over various communication links (including wired and wireless links).

[0037] Figure 1 Various example UEs 104 are depicted, which may more generally include: a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player, a camera, a game console, a tablet computer, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, an Internet of Things (IoT) device, an Always-On (AON) device, an edge processing device, or other similar devices. UE 104 may also be more generally referred to as a mobile device, a wireless device, a wireless communication device, a station, a mobile station, a subscriber station, a mobile subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a remote device, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, and others.

[0038] BS 102 wirelessly communicates with (e.g., transmits signals to or receives signals from) UE 104 via communication link 120. Communication link 120 between BS 102 and UE 104 may include uplink (UL) (also referred to as a reverse link) transmissions from UE 104 to BS 102 and / or downlink (DL) (also referred to as a forward link) transmissions from BS 102 to UE 104. In various aspects, communication link 120 may employ multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity.

[0039] BS 102 may generally include: NodeB, enhanced NodeB (eNB), next generation enhanced NodeB (ng-eNB), next generation NodeB (gNB or gNodeB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, transmission and reception point, and / or other. Each of BS 102 may provide communication coverage for a corresponding geographic coverage area 110, which may sometimes be referred to as a cell, and may overlap in some cases (e.g., a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of a macro cell). For example, a BS may provide communication coverage for a macro cell (covering a relatively large geographic area), a pico cell (covering a relatively small geographic area, such as a stadium), a femto cell (relatively small geographic area (e.g., a home)), and / or other types of cells.

[0040] Although BS 102 is depicted as a single communication device in various aspects, BS 102 can be implemented in various configurations. For example, one or more components of the base station may be decomposed, including a central unit (CU), one or more distributed units (DU), one or more radio units (RU), a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, to name a few examples. In another example, various aspects of the base station may be virtualized. More generally, a base station (e.g., BS 102) may include components located at a single physical location or components located at various physical locations. In an example in which the base station includes components located at various physical locations, the various components may each perform a function so that the various components together implement functionality similar to that of a base station located at a single physical location. In some aspects, a base station including components located at various physical locations may be referred to as a decomposed radio access network architecture (such as an open RAN (O-RAN) or virtualized RAN (VRAN) architecture). Figure 2 An example decomposed base station architecture is depicted and described.

[0041] Different BSs 102 within the wireless communication network 100 may also be configured to support different radio access technologies (such as 3G, 4G, and / or 5G). For example, a BS 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). A BS 102 configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) may interface with the 5GC 190 via a second backhaul link 184. The BSs 102 may communicate with each other directly or indirectly (e.g., via the EPC 160 or the 5GC 190) over a third backhaul link 134 (e.g., an X2 interface), which may be wired or wireless.

[0042] The wireless communication network 100 may subdivide the electromagnetic spectrum into various categories, frequency bands, channels, or other characteristics. In some aspects, the subdivision is provided based on wavelength and frequency, where frequency may also be referred to as a carrier, subcarrier, channel, tone, or subband. For example, 3GPP currently defines frequency range 1 (FR1) as including 410 MHz-7125 MHz, which is often (interchangeably) referred to as "below 6 GHz". Similarly, 3GPP currently defines frequency range 2 (FR2) as including 24,250 MHz-52,600 MHz, which is sometimes (interchangeably) referred to as "millimeter wave" ("mmW" or "mmWave"). A base station (e.g., a mmWave base station such as BS180) configured to communicate using mmWave / near mmWave radio bands may utilize beamforming (e.g., 182) with a UE (e.g., 104) to improve path loss and range.

[0043] The communication link 120 between the BS 102 and, for example, the UE 104 may be through one or more carriers, which may have different bandwidths (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, and / or other MHz) and may be aggregated in various aspects. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​compared to UL).

[0044] Communications using higher frequency bands may have higher path loss and shorter range than communications at lower frequencies. Figure 1 180) may utilize beamforming 182 with UE 104 to improve path loss and range. For example, BS 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming. In some cases, BS 180 may send beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from BS 180 in one or more receive directions 182". UE 104 may also send beamformed signals to BS 180 in one or more transmit directions 182". BS 180 may also receive beamformed signals from UE 104 in one or more receive directions 182'. BS 180 and UE 104 may then perform beam training to determine the best receive direction and transmit direction for each of BS 180 and UE 104. It is noteworthy that the transmit direction and receive direction of BS 180 may be the same or may not be the same. Similarly, the transmit direction and receive direction of UE 104 may or may not be the same.

[0045] Wireless communication network 100 also includes Wi-Fi AP 150 that communicates with Wi-Fi station (STA) 152 via communication link 154 in, for example, the 2.4 GHz and / or 5 GHz unlicensed spectrum.

[0046] Certain UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), and / or a physical sidelink feedback channel (PSFCH).

[0047] The EPC 160 may include various functional components, including: a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and / or a packet data network (PDN) gateway 172, such as in the depicted example. The MME 162 may communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management.

[0048] Generally, user Internet Protocol (IP) packets are delivered through the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176, which may include, for example, the Internet, an Intranet, an IP Multimedia Subsystem (IMS), a Packet Switched (PS) streaming media service, and / or other IP services.

[0049] The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS delivery, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and / or may be used to schedule MBMS delivery. The MBMS Gateway 168 may be used to distribute MBMS services to BSs 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting a specific service, and / or may be responsible for session management (start / stop) and for collecting eMBMS related charging information.

[0050] 5GC 190 may include various functional components, including: access and mobility management function (AMF) 192, other AMFs 193, session management function (SMF) 194, and user plane function (UPF) 195. AMF 192 may communicate with unified data management (UDM) 196.

[0051] AMF 192 is a control node that handles signaling between UE 104 and 5GC 190. AMF 192 provides, for example, Quality of Service (QoS) flow and session management.

[0052] Internet Protocol (IP) packets are delivered through UPF 195, which is connected to IP Services 197 and provides IP address allocation for UEs and other functions for 5GC 190. IP Services 197 may include, for example, the Internet, Intranet, IMS, PS streaming services, and / or other IP services.

[0053] In various aspects, a network entity or network node may be implemented as a converged base station, a decomposed base station, a component of a base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, to name a few examples.

[0054] Figure 2 An example disaggregated base station 200 architecture is depicted. The disaggregated base station 200 architecture may include one or more central units (CUs) 210 that may communicate directly with a core network 220 via a backhaul link, or indirectly with the core network 220 through one or more disaggregated base station units, such as a near real-time (near-RT) RAN intelligent controller (RIC) 225 via an E2 link, or a non-real-time (non-RT) RIC 215 associated with a service management and orchestration (SMO) framework 205, or both. The CU 210 may communicate with one or more distributed units (DUs) 230 via respective midhaul links, such as an F1 interface. The DU 230 may communicate with one or more radio units (RUs) 240 via respective fronthaul links. The RU 240 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 240.

[0055] Each of the units (e.g., CU 210, DU 230, RU 240, and near-RT RIC 225, non-RTRIC 215, and SMO framework 205) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to the communication interface of the unit may be configured to communicate with one or more of the other units via a transmission medium. For example, the units may include a wired interface configured to receive or send signals to one or more of the other units via a wired transmission medium. Additionally or alternatively, the unit may include a wireless interface that may include a receiver, transmitter, or transceiver (such as a radio frequency (RF) transceiver) configured to receive signals on a wireless transmission medium or send signals to one or more of the other units, or both.

[0056] In some aspects, CU 210 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function can be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 210. CU210 may be configured to handle user plane functionality (e.g., central unit-user plane (CU-UP)), control plane functionality (e.g., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 210 may be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 210 may be implemented to communicate with DU 230 for network control and signaling.

[0057] DU 230 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 240. In some aspects, DU 230 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) at least in part according to a functional split such as those defined by the 3rd Generation Partnership Project (3GPP). In some aspects, DU 230 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 230 or with control functions hosted by CU 210.

[0058] The lower layer functionality may be implemented by one or more RUs 240. In some deployments, the RU 240 controlled by the DU 230 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on a functional split (such as a lower layer functional split). In such an architecture, the RU 240 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 240 may be controlled by the corresponding DU 230. In some scenarios, this configuration may enable the implementation of the DU 230 and the CU 210 in a cloud-based RAN architecture (such as a vRAN architecture).

[0059] The SMO framework 205 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 205 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 205 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 290) to perform network element lifecycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 210, DU 230, RU 240, and near-RT RIC 225. In some specific implementations, the SMO framework 205 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 211) via the O1 interface. Additionally, in some specific implementations, the SMO framework 205 may communicate directly with one or more RUs 240 via the O1 interface. The SMO framework 205 may also include a non-RT RIC 215 configured to support the functionality of the SMO framework 205 .

[0060] The non-RT RIC 215 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 225. The non-RT RIC 215 may be coupled to or in communication with the near-RT RIC 225 (such as via an A1 interface). The near-RT RIC 225 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 210, one or more DUs 230, or both, and the O-eNB with the near-RTRIC 225.

[0061] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 225, the non-RT RIC 215 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 225 and may be received from a non-network data source or from a network function at the SMO framework 205 or the non-RT RIC 215. In some examples, the non-RT RIC 215 or the near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 215 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 205 (such as via reconfiguration of O1) or via creation of RAN management policies (such as A1 policies).

[0062] Figure 3 Aspects of an example BS 102 and UE 104 are depicted.

[0063] In general, BS 102 includes various processors (e.g., 320, 330, 338, and 340), antennas 334a-334t (collectively 334), transceivers 332a-332t (collectively 332) including modulators and demodulators, and other aspects that enable wireless transmission of data (e.g., data source 312) and wireless reception of data (e.g., data sink 339). For example, BS 102 can transmit and receive data between BS 102 and UE 104. BS 102 includes a controller / processor 340 that can be configured to implement various functions described herein related to wireless communication.

[0064] Generally speaking, the UE 104 includes various processors (e.g., 358, 364, 366, and 380), antennas 352a-352r (collectively 352), transceivers 354a-354r (collectively 354) including modulators and demodulators, and other aspects that enable wireless transmission of data (e.g., retrieved from a data source 362) and wireless reception of data (e.g., provided to a data sink 360). The UE 104 includes a controller / processor 380 that can be configured to implement various functions described herein related to wireless communications.

[0065] Regarding example downlink transmissions, BS 102 includes a transmit processor 320 that can receive data from a data source 312 and control information from a controller / processor 340. The control information can be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical HARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), and / or others. In some examples, the data can be for a physical downlink shared channel (PDSCH).

[0066] The transmit processor 320 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmit processor 320 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH demodulation reference signal (DMRS), and a channel state information reference signal (CSI-RS)).

[0067] The transmit (TX) multiple-input multiple-output (MIMO) processor 330 may perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide an output symbol stream to a modulator (MOD) in a transceiver 332a-332t. Each modulator in the transceiver 332a-332t may process a corresponding output symbol stream 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 the modulators in the transceivers 332a-332t may be transmitted via antennas 334a-334t, respectively.

[0068] To receive downlink transmissions, UE 104 includes antennas 352a-352r that can receive downlink signals from BS 102 and can provide received signals to demodulators (DEMODs) in transceivers 354a-354r, respectively. Each demodulator in transceivers 354a-354r can condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator can further process the input samples to obtain received symbols.

[0069] A MIMO detector 356 may obtain received symbols from all demodulators in transceivers 354a-354r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 358 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 104 to a data sink 360, and provide decoded control information to a controller / processor 380.

[0070] With respect to example uplink transmissions, the UE 104 also includes a transmit processor 364 that may receive and process data from a data source 362 (e.g., for a PUSCH) and control information from a controller / processor 380 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 364 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 364 may be pre-decoded by a TX MIMO processor 366, if applicable, further processed by a modulator in the transceivers 354a-354r (e.g., for SC-FDM), and transmitted to the BS 102.

[0071] At BS 102, uplink signals from UE 104 may be received by antennas 334 a-334 t, processed by demodulators in transceivers 332 a-332 t, detected by MIMO detector 336 if applicable, and further processed by receive processor 338 to obtain decoded data and control information transmitted by UE 104. Receive processor 338 may provide decoded data to data sink 339 and decoded control information to controller / processor 340.

[0072] Memory 342 and memory 382 may store data and program codes for BS 102 and UE 104, respectively.

[0073] The scheduler 344 may schedule UEs for data transmission on the downlink and / or uplink.

[0074] In various aspects, the BS 102 may be described as sending and receiving various types of data associated with the methods described herein. In these contexts, "sending" may refer to various mechanisms for outputting data, such as outputting data from a data source 312, a scheduler 344, a memory 342, a transmit processor 320, a controller / processor 340, a TX MIMO processor 330, a transceiver 332a-332t, an antenna 334a-334t, and / or other aspects described herein. Similarly, "receiving" may refer to various mechanisms for obtaining data, such as obtaining data from an antenna 334a-334t, a transceiver 332a-332t, a RX MIMO detector 336, a controller / processor 340, a receive processor 338, a scheduler 344, a memory 342, and / or other aspects described herein.

[0075] In various aspects, the UE 104 may also be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, "transmitting" may refer to various mechanisms for outputting data, such as outputting data from a data source 362, a memory 382, ​​a transmit processor 364, a controller / processor 380, a TX MIMO processor 366, a transceiver 354a-354t, an antenna 352a-352t, and / or other aspects described herein. Similarly, "receiving" may refer to various mechanisms for obtaining data, such as obtaining data from an antenna 352a-352t, a transceiver 354a-354t, a RX MIMO detector 356, a controller / processor 380, a receive processor 358, a memory 382, ​​and / or other aspects described herein.

[0076] In some aspects, the processor may be configured to perform various operations (such as those associated with the methods described herein) and send (output) data to or receive (obtain) data from another interface configured to send or receive data, respectively.

[0077] Figure 4A , Figure 4B , Figure 4C and Figure 4D Describes a method for use in a wireless communication network such as Figure 1 Various aspects of the data structure of the wireless communication network 100).

[0078] Specifically, Figure 4A is a diagram 400 illustrating an example of a first subframe within a 5G (e.g., 5G NR) frame structure, Figure 4B is a diagram 430 illustrating an example of a DL channel within a 5G subframe, Figure 4C is a diagram 450 illustrating an example of a second subframe within a 5G frame structure, and Figure 4D FIG480 is a diagram illustrating an example of UL channels within a 5G subframe.

[0079] Wireless communication systems may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on both the uplink and downlink. Such systems may also support half-duplex operation using time division duplex (TDD). OFDM and single carrier frequency division multiplexing (SC-FDM) can be used to maximize the system bandwidth (e.g., Figure 4B and Figure 4D ) is divided into multiple orthogonal subcarriers. Each subcarrier can be modulated with data. Modulation symbols can be transmitted in the frequency domain using OFDM and / or in the time domain using SC-FDM.

[0080] The wireless communication frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers, subframes within the set of subcarriers are dedicated to either DL or UL. The wireless communication frame structure may also be time division duplex (TDD), where for a particular set of subcarriers, subframes within the set of subcarriers are dedicated to both DL and UL.

[0081] exist Figure 4A and Figure 4C In the wireless communication frame structure, TDD is used, where D is DL, U is UL, and X is used flexibly between DL / UL. The UE can be configured with a time slot format (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling) through the received time slot format indicator (SFI). In the depicted example, the 10ms frame is divided into 10 equally sized 1ms subframes. Each subframe may include one or more time slots. In some examples, each time slot may include 7 or 14 symbols, depending on the time slot format. The subframe may also include micro-time slots, which typically have fewer symbols than the entire time slot. Other wireless communication technologies may have different frame structures and / or different channels.

[0082] In certain aspects, the number of time slots within a subframe is based on the time slot configuration and the parameter set. For example, for time slot configuration 0, different parameter sets (μ) 0 to 5 allow for 1, 2, 4, 8, 16, and 32 time slots per subframe, respectively. For time slot configuration 1, different parameter sets 0 to 2 allow for 2, 4, and 8 time slots per subframe, respectively. Thus, for time slot configuration 0 and parameter set μ , there are 14 symbols / time slot and 2μ time slots / subframe. The subcarrier spacing and symbol length / duration are functions of the parameter set. The subcarrier spacing may be equal to 2μ×15kHz, where μ is a parameter set 0 to 5. Thus, parameter set μ=0 has a subcarrier spacing of 15kHz, and parameter set μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figure 4A , Figure 4B , Figure 4C and Figure 4D An example is provided for slot configuration 0 with 14 symbols per slot and parameter set μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.

[0083] like Figure 4A , Figure 4B , Figure 4C and Figure 4DAs depicted in , a resource grid may be used to represent a frame structure. Each time slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending, for example, over 12 consecutive subcarriers. The resource grid is divided into a plurality of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0084] like Figure 4A As illustrated, some REs carry Figure 1 and Figure 3 The RS may include a demodulation RS (DMRS) and / or a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and / or a phase tracking RS (PT-RS).

[0085] Figure 4B Examples of various DL channels within a subframe of a frame are illustrated.The Physical Downlink Control Channel (PDCCH) carries DCI within one or more Control Channel Elements (CCEs), each CCE comprising, for example, nine RE Groups (REGs), each REG comprising, for example, four consecutive REs in an OFDM symbol.

[0086] The primary synchronization signal (PSS) may be in symbol 2 of a particular subframe of a frame. The PSS is transmitted by a UE (e.g., Figure 1 and Figure 3 104) is used to determine subframe / symbol timing and physical layer identity.

[0087] A Secondary Synchronization Signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and radio frame timing.

[0088] Based on the physical layer identifier and the physical layer cell identifier group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DMRS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The MIB provides the system frame number (SFN) and the number of RBs in the system bandwidth. The physical downlink shared channel (PDSCH) carries user data, broadcast system information (such as system information blocks (SIBs)) that is not sent via the PBCH, and / or paging messages.

[0089] like Figure 4CAs illustrated, some REs carry DMRS for channel estimation at the base station (indicated as R for one particular configuration, but other DMRS configurations are possible). The UE may send DMRS for PUCCH and DMRS for PUSCH. The PUSCH DMRS may be sent, for example, in the first one or two symbols of the PUSCH. The PUCCH DMRS may be sent in different configurations depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used. The UE 104 may send a sounding reference signal (SRS). The SRS may be sent, for example, in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the teeth of the comb. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0090] Figure 4D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0091] Overview of Discontinuous Reception

[0092] To reduce power consumption, user equipment (UE) can be configured for discontinuous reception (DRX) operation. Figure 5A As illustrated in timing diagram 500 of , during connected DRX mode (CDRX), UE duration can be broadly divided into an “active time” duration 502 and an “inactive” time duration 504.

[0093] During the CDRX active time (or on-duration), the UE monitors the physical downlink shared channel (PDSCH) activity, receives downlink data, sends UL data and / or performs serving cell or neighboring measurements with a given periodicity or continuous monitoring. During the active time, the UE is generally considered to be "on" while various timers are running. For example, an active duration timer (e.g., drx-onDurationTimer), an inactivity timer (drx-InactivityTimer), and a full DRX cycle duration (e.g., drx-ShortCycle) may run during the active time. The start of the DRX cycle may be defined by a start offset value.

[0094] exist Figure 5A and Figure 5B In the example shown in , the active time is 10ms and the CDRX cycle duration is 30ms. Figure 5B As illustrated in the timing diagram 510 of , the UE may be configured with an inactivity timer (starting an inactivity period 506) that restarts when activity is detected and expires after 5 ms if no activity is detected. When the inactivity timer expires, the UE enters an "inactive" or "sleep" mode.

[0095] In some cases, the UE may be configured with an enhanced CDRX (eCDRX) mode to mitigate drift in latency due to misalignment with traffic burst arrivals. Current CDRX modes are configured for integer-valued periodicity, while typical multimedia data traffic update rates (e.g., 60 Hz, 90 Hz, 45 Hz, 120 Hz, or 48 Hz) often result in non-integer-valued periodicity.

[0096] Overview of TRS Configuration

[0097] like Figure 6 As illustrated in the diagram 600 of , a TRS (burst) may be configured as a CSI-RS resource set (configured with the parameter trs-Info). A CSI-RS resource set may have 2 CSI-RS resources 602 in one time slot or 4 CSI-RS resources 604 in 2 consecutive time slots (2 CSI-RS resources per time slot).

[0098] Each of the CSI-RS resources may be single-ported and transmitted in the same bandwidth (BW) and on the same subcarrier / RE. Each CSI-RS resource may have a frequency domain (FD) density of 3 REs per RB.

[0099] Periodic TRS (P-TRS) and aperiodic TRS (AP-TRS) may be configured. For P-TRS, all CSI-RS resources in the set of 2 or 4 CSI-RS resources may have the same periodicity, bandwidth, and frequency position. An AP-TRS configuration should have a corresponding P-TRS with the same bandwidth and frequency position and quasi-co-located (QCL) in "QCL Type A" or "QCL Type D".

[0100] In some systems, TRS may be used only for DL ​​tracking (depending on the UE specific implementation) and may not be related to CSI reporting. Therefore, for aperiodic NZP CSI-RS resource sets configured with trs-Info, the UE may not expect to be configured with a CSI-ReportConfig with the higher layer parameter reportQuantity set to other than "None". In addition, the UE may not expect to be configured with a CSI-ReportConfig for periodic NZP CSI-RS resource sets configured with trs-Info.

[0101] Overview of Time Domain Correlation Profiles

[0102] As noted above, the UE may be configured to report time correlation over one or more lags of the TRS resources, where lag refers to the time distance between the measured TRSs. The lags may be within a TRS burst or different TRS bursts. When configured for multiple lags (multi-lag) time correlation reporting, the UE may need to measure TRSs across multiple bursts.

[0103] The temporal correlation values ​​A(τ) may be normalized so that the reported values ​​are in the range 0 to 1: A(τ)∈(0,1). There are various alternatives for normalizing the temporal correlation values ​​taken for TRS separated by a lag value τ. According to a first alternative (Alt 1):

[0104]

[0105] According to the second alternative (Alt 2):

[0106]

[0107] where Y(l,k) represents the received / measured value on symbol l and subcarrier k, τ represents the lag of the time correlation, and K represents the total REs for the TRS symbol.

[0108] Optionally, additional time filtering (eg averaging) may be applied over more symbols l (L denotes total symbols): According to a first alternative (A1t 1):

[0109]

[0110] Or according to the second alternative (Alt 2):

[0111]

[0112] In the multi-lag time correlation report (profile), a larger lag τ generally corresponds to a lower speed UE, while a smaller lag τ generally corresponds to a higher speed UE. c =2GHz, in the case of a specific channel like TDL-A, a lag τ=5ms may work well for UE speeds below 20km / h, while a lag τ=1ms may work well for UE speeds above 50km / h. If multiple A(τ) associated with different lags are reported, the algorithm may be implemented to select the accurate one.

[0113] To achieve time correlation with different lags, both intra-burst and inter-burst may be required. For example, 1 ms lag can be achieved by intra-burst TRS symbols (15kHz SCS), 10 ms lag can be achieved by inter-burst with P-TRS (minimum periodicity is 10 ms), and 5 ms lag can be achieved using two P-bursts (or a P-burst and an AP-burst).

[0114] Aspects related to reporting of lagged selective temporal correlations

[0115] As noted above, for some cases, the UE may not be able to obtain time correlation for all lags. For example, when discontinuous reception (DRX) is configured, TRS sent outside of the DRX active time may not be received because the UE may be in a low power state. Therefore, when the UE is configured for multi-lag time correlation reporting but is unable to obtain time correlation for all lags, there is some uncertainty in how the UE should behave.

[0116] Aspects of the present disclosure provide techniques that allow a UE to perform hysteresis selective time-dependency reporting. The techniques provide various mechanisms that allow a UE to perform time-dependency reporting only for a subset of hysteresis for which the UE is configured.

[0117] You can refer to Figure 7 The delayed selective time correlation reporting proposed herein can be understood by referring to the call flow diagram 700, which shows an example signaling between a UE and a network entity. The UE may be Figure 1 or Figure 3 An example of a UE in UE 104 illustrated in FIG. The network entity may be Figure 1 or Figure 3 The example of the base station 102 illustrated in Figure 2 A node of a decomposed base station is illustrated in FIG.

[0118] As illustrated, the network may configure a UE to report time correlation for a plurality of lags of a reference signal (RS) at 702. As noted above, each lag represents a time interval between reference signals for time correlation measurement.

[0119] At 704, the UE measures a time correlation for a subset of the plurality of configured hysteresis based on the one or more TRS bursts. The UE reports the time correlation for the subset, for example, in a Time Domain Correlation Characteristic (TDCP) report.

[0120] In this way, a UE configured for multiple configured hysteresis (τ) for reporting time correlation A(τ) based on TRS measurement is only allowed to report A(τ) values ​​for a subset of one or more hysteresis. For example, assuming that the UE is configured with a hysteresis list, such as {1 ms, 5 ms, 10 ms, 20 ms} can be configured, the UE may not be able to obtain time correlation for hysteresis 10 ms and 20 ms. Therefore, the UE may only report valid A(τ) values ​​for {1 ms, 5 ms} due to measurement availability.

[0121] As noted above, in some systems, TRS is used for DL ​​tracking, and whether to receive the TRS is up to the UE implementation. For example, in such cases, the UE may be allowed to sleep (e.g., with no reception in a timeslot or enter micro-sleep) or wake up to receive TRS when it sees fit. For example, if the TRS SNR is poor, the UE is free to rely on SSB for DL ​​tracking. For example, the TRS SNR may be poor due to a conflict with a neighboring cell DL transmission.

[0122] In some cases, when a UE is configured with DRX, the UE may not be able to receive TRS outside of DRX active times. Existing standards do not define UE behavior for TRS reception under DRX. It can be assumed that for existing typical UE implementations, TRS is not received outside of DRX active times (at least for typically configured P-TRS).

[0123] There are various options for delayed selective reporting. According to a first option, delayed selective reporting can be performed in a single-stage report. In this case, Fig. 8A As illustrated in Table 800 of FIG. 8 , for A(τ) value quantization, there may be a code point 802 indicating "invalid". Therefore, the UE may use this code point for lags where time correlation is not available.

[0124] According to the second option, delayed selective reporting can be performed in multiple states. Figure 8BAs illustrated in , in the first stage, the first report field 810 may indicate which hysteresis(es) are reported (e.g., by a bitmap), while in the second state, the second report field 820 may indicate the A(τ) value of the selected hysteresis. Figure 8B In the example illustrated in , bits 812 and 814 indicate that the second report field contains A(τ) values ​​for lags τ1 and τ4.

[0125] In existing standards, CSI can be divided into two parts (CSI Part 1 and CSI Part 2). In general, CSI Part 1 information is considered more important and has a smaller payload size (and is sent with higher reliability). As a basic rule, CSI Part 1 has a fixed payload size, while the payload size of CSI Part 2 can be determined based on decoding Part 1. In some cases, the first stage information can be reported in CSI Part 1, while the second stage information can be reported in CSI Part 2. Due to the variable number of A(τ) values ​​reported, the two-stage option can have less reporting overhead than the single-stage option.

[0126] In some cases, there may be limitations on UE capabilities for time correlation reporting. In some cases, for time correlation (profile) reporting, at least one of the following may be configured for the UE: Maximum hysteresis τ max , the maximum number of hysteresis configured for A(τ) reporting, or the maximum number of hysteresis with A(τ) values ​​reported in a single report. One or more of these values ​​may depend on the UE capabilities reported by the UE. These values ​​may be designed to limit the buffer requirements for the UE, as longer hysteresis or more hysteresis requires a larger buffer for previously received TRS measurements Y(l-τ, k), τ = τ1 ， ..., τ M , k = 0, 1, ..., 3N RB -1).

[0127] As noted above, the time correlation values ​​may be normalized to be in the range of 0 to 1: A(τ)∈(0,1). According to certain aspects, for the time correlation of a single sample, the normalization may be determined by the product of two corresponding quantities of two symbols (separated by a lag), such as the sum of the squares of the received signal amplitude at each RE. For example, the definition of the time correlation for a single sample (between a pair of symbols separated by a lag τ) may be:

[0128]

[0129] For more than one sample (pair), the definition of temporal correlation can be:

[0130] or

[0131] These definitions may be relatively robust to random phase jumps between symbol l-τ and symbol 1. This definition may also be more robust to automatic gain control (AGC) between symbol l-τ and symbol 1 when compared to the first alternative for normalization described above (Alt1).

[0132] In some cases, the temporal correlation values ​​for different lags are reported with different quantization intervals, which means that there may be a lag specific quantization A(τ). Fig. 9 900 and 910 depict example quantization for different time correlation lags according to certain aspects of the present disclosure. One reason for this is that for smaller lags τ, A(τ) can be larger and more quantization intervals can be close to 1, as shown at 902. On the other hand, for larger lags τ, A(τ) can be smaller and more quantization intervals should be close to 0, as shown at 912.

[0133] Aspects of the present disclosure provide various options for supporting longer hysteresis, which can help utilize resources efficiently. For example, for hysteresis that is longer than the intra-burst period (e.g., 1 millisecond) but still relatively short relative to the TRS periodicity (e.g., 5 milliseconds, 10 milliseconds), P-TRS may be wasteful in terms of resource consumption.

[0134] FIG. 10A to FIG. 10C Depicted are options for supporting longer hysteresis according to certain aspects of the present disclosure. Fig. 10A As illustrated in timing diagram 1000A of FIG. 1000A , according to a first option, a multi-burst AP-TRS (e.g., as defined in Rel-17 for fast Scell ​​activation) may be used. In this case, hysteresis selective reporting may not be needed (because all TRS bursts occur contingently after the PDCCH is triggered). As illustrated, this may allow a first hysteresis (hysteresis 1) between TRSs in the same burst (intra-burst) and a larger hysteresis (hysteresis 2) between TRSs of different bursts.

[0135] like Fig. 10B As illustrated in the timing diagram 1000B of , according to the second option, a new definition of a CSI-RS resource set of a single-port CSI-RS having a different time spacing than the existing TRS (P / SP or AP) can be provided. As illustrated, the different time spacing can allow a first lag (lag 1) between the first single-port CSI-RS and the second single-port CSI-RS, a second lag (lag 2) between the second single-port CSI-RS and the third single-port CSI-RS, and a third lag (lag 3) between the first single-port CSI-RS and the third single-port CSI-RS.

[0136] like Fig. 10B As illustrated in timing diagram 1000B, according to the third option, a combination of a previously defined (so-called legacy) TRS burst with one or more single-port CSI-RS according to the first option (e.g., more than 4 symbols configured within this CSI-RS resource set) is provided. This approach may allow a first lag (lag 1) between the TRSs of the TRS burst and a second lag (lag 2) between the TRSs of the burst and the single-port CSI-RS.

[0137] In the case of the third option, the single-port CSI-RS may have the same QCL as the TRS burst. For the second and third options, in the case of AP-CSI-RS (TRS), hysteresis selective reporting may not be required. Although hysteresis selective reporting may still be required for P- / SP-CSI-RS (TRS).

[0138] In some cases, there may be some timeline restrictions on the CSI reference resources (e.g. to give the UE time to generate the report value from the measurement). For example, for the CSI-RS time resource, the valid DL time slot may occur at nn CSI_ref (before UL time slot n in which CSI is reported). For P / SP reporting, n CSI_ref Can be (single CSI-RS) or The minimum value of (multiple CSI-RS) makes the time slot nn CSI_ref Corresponds to the valid DL time slot. For aperiodic reporting, n CSI_ref Can be The minimum value of time slot nn CSI_ref Corresponds to a valid DL time slot (where Z' is the required processing timeline for CSI-RS reporting PUSCH). A PDSCH pattern may be assumed, including the symbols used within the time slot, the DMRS pattern, the SCS, and the layer mapping pattern associated with the reported PMI.

[0139] Fig.11 Depicted are example uses of timeline anchor time slots for lagged selective temporal correlation reporting in accordance with certain aspects of the present disclosure.

[0140] In some cases, it may not be necessary to define a reference resource for A(τ) reporting (eg, a time slot defined as the time represented by this reported A(τ) value), but rather just define what may be referred to as a timeline anchor slot.

[0141] Fig.11An example use of a timeline anchor time slot 1102 for a delayed selective time correlation report transmitted in a time slot 1104 in accordance with certain aspects of the present disclosure is depicted. According to certain aspects, a UE may only need to report A(τ) via a TRS measurement no later than the timeline anchor time slot. For this relatively relaxed timeline, it may not be necessary to restrict reporting to being based on the most recent TRS burst (for intra-burst hysteresis) or the two most recent TRS bursts (for cross-burst hysteresis) for A(τ) reporting, as long as the reporting is based on TRS measurements no later than the timeline anchor time slot. In the illustrated example, the timeline anchor time slot 1102 (similar to the reference resource time slot in existing standards) may be n before the reporting time slot. CSI_ref appears, for example, where for P- / SP-reports, n CSI_ref ≥ 4 or 5 slots, or for AP-report, In some cases, even if the TRS is configured with A(τ) reporting, the UE may not expect to be configured with the same timeRestrictionForChannelMeasurements as the TRS in the current standard without configured reporting.

[0142] As noted above, DRX may impact time-dependent reporting.There are various options for defining the UE behavior for time-dependent reporting in DRX.

[0143] For example, the first option may follow the existing CSI mechanism, where the UE only needs to report one or more lagged latest A(τ) based on the TRS received within the DRXactiveTime. In other words, the UE does not need to receive TRS outside the DRX active time. When configured with a wake-up signal (for signaling the UE whether it needs to wake up the DRX on duration), if the UE is configured with TransmitOtherPeriodicCSI, the UE may additionally only need to report one or more lagged latest A(τ) based on the TRS received in the DRX on duration outside the DRXactiveTime. For TRS within the DRX active time (or DRXonDuration additionally outside the DRXactiveTime when the above-mentioned WUS plus parameter TransmitOtherPeriodicCSI is configured), the UE may use lagged selective reporting as proposed in this document.

[0144] According to the second option, the UE may perform delayed selective reporting regardless of whether the TRS is within / outside the DRXactiveTime. In some cases, following the current CSI reporting rules under DRX, the UE may also not need to report P- / SP-reports of A(τ) outside the DRXactiveTime. In some cases, when configured with WUS and if TransmitOtherPeriodicCSI is configured, the P- / SP-report of A(τ) may additionally be reported by the UE in the DRXonDuration outside the DRXactiveTime.

[0145] By allowing the UE to perform hysteresis-specific time-dependent reporting, the UE may be able to provide valuable feedback even when some configured hysteresis is not available. This feedback may result in more optimized downlink precoding, better system performance, and an improved overall user experience.

[0146] Example Operation of User Equipment

[0147] Fig.12 The method for using a UE (such as Figure 1 and Figure 3 An example of a method 1200 for performing wireless communications at a UE 104).

[0148] Method 1200 begins at step 1205, where signaling is received that configures the UE to report a plurality of lags of time correlation for the RS, where each lag represents a time interval between reference signals for time correlation measurement. In some cases, the operation of this step refers to as described in reference Fig.14 The described circuits for receiving and / or code for receiving may be or may be performed by the circuits and / or the code.

[0149] Method 1200 then proceeds to step 1210, where the time correlation for a subset of the plurality of configured hysteresis is reported. In some cases, the operation of this step refers to the operation described in reference to Fig.14 The described circuits for reporting and / or codes for reporting may be or may be performed by the circuits and / or the codes.

[0150] In some aspects, method 1200 further includes determining the subset based on the measurement availability of the reference signal. In some cases, the operation of this step refers to the reference signal. Fig.14 The described circuit for determining and / or code for determining may be or may be performed by the circuit and / or the code.

[0151] In some aspects, the method 1200 further includes reporting a codepoint indicating an invalid time correlation value for one or more of the configured hysteresis that are not in the subset. In some cases, the operation of this step refers to as described in reference to Fig.14 The described circuits for reporting and / or codes for reporting may be or may be performed by the circuits and / or the codes.

[0152] In some aspects, reporting a temporal correlation for a subset of a plurality of configured hysteresis comprises: indicating in a first reporting field which hysteresis are in the subset; and indicating in a second reporting field a temporal correlation value for the hysteresis indicated in the first reporting stage.

[0153] In some aspects, signaling configuring the UE to report time correlations for multiple lags for an RS indicates at least one of: a maximum lag for time correlation reporting, a maximum number of lags configured for time correlation reporting, or a maximum number of lags having time correlation values ​​reported in a single report.

[0154] In some aspects, the method 1200 further includes performing normalization on the reported time correlation value, wherein for a single sample of time correlation, the normalization is determined by multiplying the squared sum of the received signal amplitudes at each RE of two reference signals separated by a lag. In some cases, the operation of this step refers to as reference Fig.14 The described circuits for performing and / or code for performing may be or may be performed by the circuits and / or the code.

[0155] In some aspects, the temporal correlation values ​​for different lags are reported at different quantization intervals.

[0156] In some aspects, the temporal correlation values ​​are reported in a range of zero to one; a first lag has more quantization intervals around one than around zero; and a second lag greater than the first lag has more quantization intervals around zero than around one.

[0157] In some aspects, the signaling configures the UE to report the time correlation of multiple bursts for the aperiodic TRS.

[0158] In some aspects, signaling configures the UE to report the time correlation of multiple bursts for a single-port CSI-RS at a different time spacing than configured for TRS.

[0159] In some aspects, signaling configures the UE to report time correlation of multiple bursts of a single-port CSI-RS and one or more bursts of TRS.

[0160] In some aspects, the UE is configured to report the time correlation value for the hysteresis based on a pair of most recent bursts of the TRS; the bursts of the pair are separated by the hysteresis; and the pair of most recent bursts are no later than the timeline anchor timeslot.

[0161] In some aspects, the UE is configured to report one or more lagged most recent time correlation values ​​based on: TRS received during DRX active time; or TRS received during DRX on duration outside of DRX active time if the UE is configured with WUS.

[0162] In some aspects, the UE reports time correlation for only a subset of the plurality of configured hysteresis, regardless of whether the TRS is received within or outside of the DRX active time.

[0163] In one aspect, method 1200 or any aspect related thereto may be performed by an apparatus such as Fig.14 The method 1200 is performed by a communication device 1400 that includes various components operable, configured, or adapted to perform the method 1200. The communication device 1400 is described in more detail below.

[0164] Please note that Fig.12 This is merely one example of a method and other methods including fewer, additional, or alternative steps are also possible consistent with the present disclosure.

[0165] Example Operations of Network Entities

[0166] Fig.13 A method for performing a multi-layered operation on a network entity such as Figure 1 and Figure 3 BS102 or such Figure 2 An example of a method 1300 for performing wireless communications at a decomposed base station) as discussed.

[0167] Method 1300 begins at step 1305, where signaling is sent to configure the UE to report a plurality of lags of time correlation for the RS, where each lag represents a time interval between reference signals for time correlation measurement. In some cases, the operation of this step refers to as described in reference Fig.14 The described circuits for transmitting and / or codes for transmitting may be or may be performed by the circuits and / or the codes.

[0168] Method 1300 then proceeds to step 1310, where a report of time correlation for a subset of a plurality of configured hysteresis generated by the UE is received. In some cases, the operation of this step refers to the operation of Fig.14 The described circuits for receiving and / or code for receiving may be or may be performed by the circuits and / or the code.

[0169] In some aspects, method 1300 further includes determining the subset based on the measurement availability of the reference signal. In some cases, the operation of this step refers to the reference signal. Fig.14 The described circuit for determining and / or code for determining may be or may be performed by the circuit and / or the code.

[0170] In some aspects, the report includes a codepoint representing an invalid time correlation value for one or more of the configured hysteresis that are not in the subset.

[0171] In some aspects, reporting time includes a first reporting field indicating which lags are in the subset and a second reporting field indicating a time correlation value for the lags indicated in the first reporting stage.

[0172] In some aspects, signaling configuring the UE to report time correlations for multiple lags for an RS indicates at least one of: a maximum lag for time correlation reporting, a maximum number of lags configured for time correlation reporting, or a maximum number of lags having time correlation values ​​reported in a single report.

[0173] In some aspects, the temporal correlation values ​​for different lags are reported at different quantization intervals.

[0174] In some aspects, the temporal correlation values ​​are reported in a range of zero to one; a first lag has more quantization intervals around one than around zero; and a second lag greater than the first lag has more quantization intervals around zero than around one.

[0175] In some aspects, the signaling configures the UE to report the time correlation of multiple bursts for the aperiodic TRS.

[0176] In some aspects, signaling configures the UE to report the time correlation of multiple bursts for a single-port CSI-RS at a different time spacing than configured for TRS.

[0177] In some aspects, signaling configures the UE to report time correlation of multiple bursts of a single-port CSI-RS and one or more bursts of TRS.

[0178] In some aspects, the UE is configured to report the time correlation value for the hysteresis based on a pair of most recent bursts of the TRS; the bursts of the pair are separated by the hysteresis; and the pair of most recent bursts are no later than the timeline anchor timeslot.

[0179] In some aspects, the UE is configured to report one or more lagged most recent time correlation values ​​based on: TRS received during DRX active time; or TRS received during DRX on duration outside of DRX active time if the UE is configured with WUS.

[0180] In one aspect, method 1300 or any aspect related thereto may be performed by an apparatus such as Fig.14 The method 1300 is performed by a communication device 1400 that includes various components operable, configured, or adapted to perform the method 1300. The communication device 1400 is described in more detail below.

[0181] Please note that Fig.13 This is merely one example of a method and other methods including fewer, additional, or alternative steps are also possible consistent with the present disclosure.

[0182] Example Communication Device

[0183] Fig.14 Depicted are aspects of an example communications device 1400. In some aspects, communications device 1400 is user equipment, such as described above with respect to Figure 1 and Figure 3 UE 104 is described. In some aspects, the communication device 1400 is a network entity such as Figure 1 and Figure 3 BS102 or such Figure 2 The decomposed base station in question.

[0184] The communication device 1400 includes a processing system 1405 coupled to a transceiver 1475 (e.g., a transmitter and / or a receiver). In some aspects (e.g., when the communication device 1400 is a network entity), the processing system 1405 can be coupled to a network interface 1485 that is configured to communicate with the communication device 1400 via a communication link (e.g., as described herein, such as with respect to Figure 2 The processing system 1405 may be configured to perform processing functions for the communication device 1400, including processing signals received by the communication device 1400 and / or to be sent by the communication device 1400.

[0185] The processing system 1405 includes one or more processors 1410. In various aspects, such as with respect to Figure 3As depicted, the one or more processors 1410 may represent one or more of the receive processor 358, the transmit processor 364, the TX MIMO processor 366, and / or the controller / processor 380. In various aspects, as described with respect to Figure 3 As described, the one or more processors 1410 may represent one or more of the receive processor 338, the transmit processor 320, the TX MIMO processor 330, and / or the controller / processor 340. The one or more processors 1410 are coupled to the computer-readable medium / memory 1440 via the bus 1470. In some aspects, the computer-readable medium / memory 1440 is configured to store instructions (e.g., computer-executable code) that, when executed by the one or more processors 1410, cause the one or more processors 1410 to perform: Fig.12 Method 1200 described herein or any aspect thereof; and / or Fig.13 The method 1300 described herein or any aspect related thereto. Note that references to a processor performing a function of the communication device 1400 may include one or more processors 1410 performing that function of the communication device 1400 .

[0186] In the depicted example, computer readable medium / memory 1440 stores code (e.g., executable instructions) such as code for receiving 1445, code for reporting 1450, code for determining 1455, code for executing 1460, and code for sending 1465. Processing of code for receiving 1445, code for reporting 1450, code for determining 1455, code for executing 1460, and code for sending 1465 may cause communication device 1400 to perform: Fig.12 Method 1200 described herein or any aspect thereof; and / or Fig.13 The method 1300 described herein or any aspect related thereto.

[0187] The one or more processors 1410 include circuits configured to implement (e.g., execute) code stored in the computer-readable medium / memory 1440, including circuits such as circuits for receiving 1415, circuits for reporting 1420, circuits for determining 1425, circuits for executing 1430, and circuits for sending 1435. Processing using the circuits for receiving 1415, the circuits for reporting 1420, the circuits for determining 1425, the circuits for executing 1430, and the circuits for sending 1435 may cause the communication device 1400 to perform: Fig.12 Method 1200 described herein or any aspect thereof; and / or Fig.13 The method 1300 described herein or any aspect related thereto.

[0188] The various components of the communication device 1400 may provide means for performing the following: Fig.12 Method 1200 described herein or any aspect thereof; and / or Fig.13 The method 1300 described herein or any aspect related thereto. For example, a component for sending, transmitting, or outputting for sending may include Figure 3 The transceiver 354 and / or antenna 352 of the UE 104 illustrated in Figure 3 The transceiver 332 and / or antenna 334 of the BS 102 and / or Fig.14 The transceiver 1475 and antenna 1480 of the communication device 1400 in FIG. 1470 may include Figure 3 The transceiver 354 and / or antenna 352 of the UE 104 illustrated in Figure 3 The transceiver 332 and / or antenna 334 of the BS 102 and / or Fig.14 The transceiver 1475 and antenna 1480 of the communication device 1400 in FIG.

[0189] Sample Clauses

[0190] Specific implementation examples are described in the following numbered clauses:

[0191] Clause 1: A method for wireless communication at a UE, comprising: receiving signaling configuring the UE to report time correlation for multiple lags of an RS, wherein each lag represents a time interval between reference signals for a time correlation measurement; and reporting time correlation for a subset of the multiple configured lags.

[0192] Clause 2: The method of clause 1, further comprising: determining the subset based on a measurement availability of the reference signal.

[0193] Clause 3: A method as described in any of clauses 1 and 2, further comprising: reporting a codepoint representing an invalid time correlation value for one or more of the configured hysteresis that is not in the subset.

[0194] Clause 4: A method according to any one of clauses 1 to 3, wherein reporting the time correlation for the subset of the plurality of configured lags comprises: indicating in a first reporting field which lags are in the subset; and indicating in a second reporting field the time correlation values ​​for the lags indicated in the first reporting stage.

[0195] Clause 5: A method according to any one of clauses 1 to 4, wherein the signaling configuring the UE to report time correlations for multiple lags for an RS indicates at least one of: a maximum lag for time correlation reporting, a maximum number of lags configured for time correlation reporting, or a maximum number of lags having time correlation values ​​reported in a single report.

[0196] Clause 6: The method according to any one of clauses 1 to 5 further comprises: performing normalization on the reported time correlation value, wherein for the time correlation of a single sample, the normalization is determined by multiplying the product of the sum of the squares of the received signal amplitudes at each RE of two reference signals separated by a lag.

[0197] Clause 7: A method according to any of clauses 1 to 6, wherein: the temporal correlation values ​​for different lags are reported at different quantization intervals.

[0198] Clause 8: A method according to clause 7, wherein: the time correlation value is reported in the range of zero to one; the first lag has more quantization intervals near one than near zero; and a second lag greater than the first lag has more quantization intervals near zero than near one.

[0199] Clause 9: A method as described in any of clauses 1 to 8, wherein: the signaling configures the UE to report the time correlation of multiple bursts for an aperiodic TRS.

[0200] Clause 10: A method as described in any of clauses 1 to 9, wherein: the signaling configures the UE to report the time correlation of multiple bursts for a single-port CSI-RS at a time spacing different from the time spacing configured for TRS.

[0201] Clause 11: A method as described in any of clauses 1 to 10, wherein: the signaling configures the UE to report time correlation of multiple bursts for a single-port CSI-RS and one or more bursts of TRS.

[0202] Clause 12: A method according to any one of clauses 1 to 11, wherein: the UE is configured to report a time correlation value for a lag based on a pair of most recent bursts of the TRS; the bursts of the pair are separated by the lag; and the pair of most recent bursts are no later than the timeline anchor time slot.

[0203] Clause 13: A method according to any one of clauses 1 to 12, wherein the UE is configured to report one or more lagged most recent time correlation values ​​based on: TRS received during the DRX active time; or TRS received during the DRX on duration outside the DRX active time when the UE is configured with WUS.

[0204] Clause 14: A method as set out in any of clauses 1 to 13, wherein the UE reports the time correlation for only the subset of the plurality of configured hysteresis, irrespective of whether the TRS is received within or outside of DRX active time.

[0205] Clause 15: A method for wireless communications at a network entity, comprising: sending signaling configuring a UE to report time correlation for a plurality of lags of an RS, wherein each lag represents a time interval between reference signals for a time correlation measurement; and receiving a report of time correlation for a subset of the plurality of configured lags generated by the UE.

[0206] Clause 16: The method of clause 15, further comprising: determining the subset based on a measurement availability of the reference signal.

[0207] Clause 17: A method as recited in any of clauses 15 and 16, wherein the report comprises a codepoint representing an invalid time correlation value for one or more of the configured hysteresis that are not in the subset.

[0208] Clause 18: A method according to any one of clauses 15 to 17, wherein reporting time comprises: a first reporting field, the first reporting field indicating which lags are in the subset; and a second reporting field, the second reporting field indicating a time correlation value for the lags indicated in the first reporting stage.

[0209] Clause 19: A method according to any one of clauses 15 to 18, wherein the signaling configuring the UE to report time correlations for multiple lags for an RS indicates at least one of: a maximum lag for time correlation reporting, a maximum number of lags configured for time correlation reporting, or a maximum number of lags having time correlation values ​​reported in a single report.

[0210] Clause 20: A method according to any of clauses 15 to 19, wherein: the temporal correlation values ​​for different lags are reported at different quantization intervals.

[0211] Clause 21: A method according to clause 20, wherein: the time correlation value is reported in the range of zero to one; the first lag has more quantization intervals near one than near zero; and a second lag greater than the first lag has more quantization intervals near zero than near one.

[0212] Clause 22: A method as described in any of clauses 15 to 21, wherein: the signaling configures the UE to report the time correlation of multiple bursts for an aperiodic TRS.

[0213] Clause 23: A method as described in any of clauses 15 to 22, wherein: the signaling configures the UE to report the time correlation of multiple bursts for a single-port CSI-RS at a time spacing different from the time spacing configured for TRS.

[0214] Clause 24: A method as described in any of clauses 15 to 23, wherein: the signaling configures the UE to report time correlation of multiple bursts for a single-port CSI-RS and one or more bursts of TRS.

[0215] Clause 25: A method according to any one of clauses 15 to 24, wherein: the UE is configured to report a time correlation value for a lag based on a pair of most recent bursts of the TRS; the bursts of the pair are separated by the lag; and the pair of most recent bursts are no later than the timeline anchor time slot.

[0216] Clause 26: A method according to any one of clauses 15 to 25, wherein the UE is configured to report one or more lagged most recent time correlation values ​​based on: TRS received during the DRX active time; or TRS received during the DRX on duration outside the DRX active time when the UE is configured with WUS.

[0217] Clause 27: An apparatus comprising: a memory including executable instructions; and a processor configured to execute the executable instructions and cause the apparatus to perform the method according to any one of clauses 1 to 26.

[0218] Clause 28: An apparatus comprising: means for performing the method according to any one of clauses 1 to 26.

[0219] Clause 29: A non-transitory computer readable medium comprising executable instructions which, when executed by a processor of an apparatus, cause the apparatus to perform the method of any one of clauses 1 to 26.

[0220] Clause 30: A computer program product embodied on a computer readable storage medium, comprising: code for performing the method according to any one of clauses 1 to 26.

[0221] Additional considerations

[0222] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein are not limited to the scope, applicability or aspects set forth in the claims. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. For example, without departing from the scope of the present disclosure, the functions and arrangements of the elements discussed may be changed. Various examples may omit, replace or add various processes or components as appropriate. For example, the described methods may be performed in an order different from the order described, and various actions may be added, omitted or combined. In addition, the features described for 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, functionality or structures and functionality that are supplementary or alternative to the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0223] The various illustrative logic blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or performed using a general purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, a system on a chip (SoC), or any other such configuration.

[0224] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items (including single members). For example, "at least one of a, b, or c" is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cC, and cCc, or any other ordering of a, b, and c).

[0225] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Additionally, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Additionally, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0226] The method disclosed herein includes one or more actions for implementing the method. The method actions are interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of actions is specified, the order and / or use of specific actions may be modified without departing from the scope of the claims. In addition, the various operations of the method described above may be performed by any appropriate component capable of performing the corresponding function. The component may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs) or processors.

[0227] The following claims are not intended to be limited to the various aspects shown herein, but should be given the full scope consistent with the language of the claims. Within the claims, unless otherwise specified, reference to an element in the singular form is not intended to mean "one and only one", but "one or more". Unless otherwise specified, the term "some" refers to one or more. No claim element is interpreted according to the provisions of 35 U.S.C. § 112 (f) unless the element is explicitly stated using the phrase "parts for...". All structural and functional equivalents of the elements of the various aspects described throughout this disclosure that are known or will later be known to a person of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: receiving signaling configuring the UE to report time correlation for a plurality of lags of a reference signal (RS), wherein each lag represents a time interval between reference signals for time correlation measurement; and Reports the temporal correlation for a subset of multiple configured lags.

2. The method according to claim 1, further comprising: The subset is determined based on a measured availability of the reference signal.

3. The method according to claim 1, further comprising: A codepoint representing an invalid time correlation value for one or more of the configured hysteresis that is not in the subset is reported.

4. The method of claim 1 , wherein reporting the temporal correlation for the subset of the plurality of configured hysteresis comprises: indicating in a first reporting field which hysteresis are in the subset; as well as A time correlation value for the lag indicated in the first reporting stage is indicated in a second reporting field.

5. The method of claim 1 , wherein the signaling configuring the UE to report a time correlation of multiple lags for an RS indicates at least one of: The maximum hysteresis used for time correlation reporting, the maximum number of hysteresis configured for time correlation reporting, or the maximum number of hysteresis having time correlation values ​​reported in a single report.

6. The method according to claim 1, further comprising: A normalization is performed on the reported time correlation values, where for a single sample of time correlation the normalization is determined by the product of the sum of the squares of the received signal amplitudes at each resource element (RE) of two reference signals separated by a lag.

7. The method according to claim 1, wherein: The temporal correlation values ​​for different lags are reported at different quantization intervals.

8. The method according to claim 7, wherein: Temporal correlation values ​​are reported on a scale of zero to one; The first lag has more quantization intervals around one than around zero; and A second hysteresis, which is larger than the first hysteresis, has more quantization intervals around zero than around one.

9. The method according to claim 1, wherein: The signaling configures the UE to report a time correlation of multiple bursts for an aperiodic tracking reference signal (TRS).

10. The method of claim 1, wherein: The signaling configures the UE to report a time correlation of multiple bursts for a single-port channel state information reference signal (CSI-RS) at a time spacing different from a time spacing configured for a tracking reference signal (TRS).

11. The method according to claim 1, wherein: The signaling configures the UE to report time correlation for multiple bursts of a single-port channel state information reference signal (CSI-RS) and one or more bursts of a tracking reference signal (TRS).

12. The method of claim 1, wherein: The UE is configured to report a time correlation value for a lag based on a pair of most recent bursts of a tracking reference signal (TRS); The bursts of the pair are separated by the hysteresis; and The pair of most recent bursts is no later than the timeline anchor timeslot.

13. The method of claim 1 , wherein the UE is configured to report one or more lagged most recent temporal correlation values ​​based on: Tracking Reference Signal (TRS) received during Discontinuous Reception (DRX) Active Time; or A TRS received during the DRX On Duration outside the DRX Active Time in case the UE is configured with a wake-up signal (WUS).

14. The method of claim 1, wherein the UE reports time correlation for only the subset of the plurality of configured hysteresis regardless of whether a TRS is received within or outside of a DRX active time.

15. A method for wireless communication at a network entity, comprising: sending signaling configuring a user equipment (UE) to report time correlation for a plurality of lags of a reference signal (RS), wherein each lag represents a time interval between reference signals for time correlation measurement; as well as A report of time correlation for a subset of a plurality of configured hysteresis is received, generated by the UE.

16. The method according to claim 15, further comprising: The subset is determined based on a measured availability of the reference signal.

17. The method of claim 15, wherein the report includes a codepoint representing an invalid time correlation value for one or more of the configured hysteresis that are not in the subset.

18. The method of claim 15, wherein reporting time comprises: a first reporting field indicating which hysteresis are in the subset; and A second reporting field indicating a time correlation value for the lag indicated in the first reporting stage.

19. The method of claim 15, wherein the signaling configuring the UE to report a plurality of lagged time correlations for RSs indicates at least one of: The maximum hysteresis used for time correlation reporting, the maximum number of hysteresis configured for time correlation reporting, or the maximum number of hysteresis having time correlation values ​​reported in a single report.

20. The method of claim 15, wherein: The temporal correlation values ​​for different lags are reported at different quantization intervals.

21. The method of claim 20, wherein: Temporal correlation values ​​are reported on a scale of zero to one; The first lag has more quantization intervals around one than around zero; and A second hysteresis, which is larger than the first hysteresis, has more quantization intervals around zero than around one.

22. The method of claim 15, wherein: The signaling configures the UE to report a time correlation of multiple bursts for an aperiodic tracking reference signal (TRS).

23. The method of claim 15, wherein: The signaling configures the UE to report a time correlation of multiple bursts for a single-port channel state information reference signal (CSI-RS) at a time spacing different from a time spacing configured for a tracking reference signal (TRS).

24. The method of claim 15, wherein: The signaling configures the UE to report time correlation for multiple bursts of a single-port channel state information reference signal (CSI-RS) and one or more bursts of a tracking reference signal (TRS).

25. The method of claim 15, wherein: The UE is configured to report a time correlation value for a lag based on a pair of most recent bursts of a tracking reference signal (TRS); The bursts of the pair are separated by the hysteresis; and The pair of most recent bursts is no later than the timeline anchor timeslot.

26. The method of claim 15, wherein the UE is configured to report one or more lagged most recent temporal correlation values ​​based on: Tracking Reference Signal (TRS) received during Discontinuous Reception (DRX) Active Time; or A TRS received during the DRX On Duration outside the DRX Active Time in case the UE is configured with a wake-up signal (WUS).

27. An apparatus comprising: a memory including executable instructions; and a processor configured to execute the executable instructions and cause the apparatus to perform the method according to any one of claims 1 to 26.

28. An apparatus comprising: Components for carrying out the method according to any one of claims 1 to 26.

29. A non-transitory computer readable medium comprising executable instructions which, when executed by a processor of a device, cause the device to perform the method of any one of claims 1 to 26.

30. A computer program product embodied on a computer-readable storage medium, comprising: Code for executing the method according to any one of claims 1 to 26.

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