Determining applicable time of path loss reference signal

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive an activation command for a path loss reference signal (PLRS). The UE can estimate a path loss using the PLRS based at least in part on an applicable time of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss. Numerous other aspects are provided.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 980,864, filed February 24, 2020, entitled “DETERMINING AN APPLICABLE TIME FOR A PATHLOSS REFERENCE SIGNAL,” and U.S. Non-Provisional Patent Application No. 17 / 248,183, filed January 13, 2021, entitled “DETERMINING AN APPLICABLE TIME FOR A PATHLOSS REFERENCE SIGNAL,” which are expressly incorporated herein by reference. Technical Field

[0003] This disclosure generally relates to wireless communication and techniques and apparatus for determining the applicable time of a path loss reference signal. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE) systems. LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0005] Wireless communication networks may include multiple base stations (BSs) capable of supporting communication for multiple user equipments (UEs). UEs can communicate with the BS via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, and an uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, Access Point (AP), Radio Headend, Transmit / Receive Point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols to communicate over the air interfaces. New Radio (NR), which can also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDM with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP- OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies. SUMMARY

[0007] In some aspects, a method of wireless communication, performed by a user equipment (UE), can include receiving an activation command of a path loss reference signal (PLRS); and estimating a path loss using the PLRS based at least in part on a time of applicability of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss.

[0008] In some aspects, a UE for wireless communication can include a memory; and one or more processors operatively coupled to the memory. The memory and the one or more processors can be configured to receive an activation command of a PLRS; and estimate a path loss using the PLRS based at least in part on a time of applicability of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss.

[0009] In some aspects, a non-transitory computer-readable medium can store one or more sets of instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions can cause the one or more processors to receive an activation command of a PLRS; and estimate a path loss using the PLRS based at least in part on a time of applicability of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss.

[0010] In some aspects, an apparatus for wireless communication can include means for receiving an activation command of a PLRS; and means for estimating a path loss using the PLRS based at least in part on a time of applicability of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss.

[0011] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems, as described herein and as illustrated by the figures.

[0012] The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows can be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily utilized as bases for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions are not to be considered as departing from the scope of the appended claims. The illustrative features and the operations described herein are implemented or carried out in conjunction with various aspects of the disclosure. The features, their organization and method of operation, together with additional objectives, features and advantages can be better understood from the following description taken in connection with the following drawings. Each figure is provided by way of explanation and is not meant as a limitation on the scope of the claims. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to enable a thorough and complete understanding of the above-mentioned features of the present disclosure, a more detailed description can be obtained by reference to aspects, some of which are illustrated in the attached drawings. It is to be noted, however, that the drawings merely illustrate certain typical aspects of the disclosure and are therefore not to be considered limiting of its scope, as the description can admit to other equally effective aspects. Like reference numerals in the various drawings can identify the same or similar elements.

[0014] Figure 1 is a block diagram illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.

[0015] Figure 2 is a block diagram illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.

[0016] Figure 3 is a diagram illustrating an example process performed, for example, by a UE, in accordance with various aspects of the present disclosure.

[0017] Figure 4 is a data flow diagram illustrating an example of a data flow between different components in an example apparatus, in accordance with various aspects of the present disclosure.

[0018] Figure 5 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system, in accordance with various aspects of the present disclosure. DETAILED DESCRIPTION

[0019] Various aspects of the disclosure are more fully described below with reference to the figures. The disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided as illustrative and pedagogical aids to convey the scope of the disclosure to those skilled in the art and to facilitate an understanding of the disclosure. Based on the teachings herein one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of a claim.

[0020] Several aspects of telecommunication systems will now be presented with reference to various apparatus and techniques. These apparatus and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, and / or the like (collectively referred to as “elements”). These elements can be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0021] It should be noted that while aspects can be described herein using terminology commonly associated with 3G and / or 4G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as 5G and later, including NR technologies.

[0022] Figure 1 is a schematic diagram illustrating a wireless network 100 in which aspects of the present disclosure can be practiced. The wireless network 100 can be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 can include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 1 lOd) and other network entities. A BS is an entity that communicates with user equipment (UEs) and can also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB), an access point, a transmit receive point (TRP), and / or the like. Each BS can provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to a coverage area of a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0023] A BS can provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell can cover a relatively large geographic area (e.g., several kilometers in radius) and can allow unrestricted access by UEs with service subscriptions. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femto cell can cover a relatively small geographic area (e.g., a home) and can allow restricted access by UEs with service subscription(s). A BS for a macro cell can be referred to as a macro BS. A BS for a pico cell can be referred to as a pico BS. A BS for a femto cell can be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BS 110a can be a macro BS for a macro cell 102a, BS 110b can be a pico BS for a pico cell 102b, and BS 110c can be a femto BS for a femto cell 102c. A BS can support one or multiple (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” can be used interchangeably herein.

[0024] In some aspects, a cell can not necessarily be stationary, and the geographic area of the cell can move according to the location of a mobile BS. In some aspects, a BS can be interconnected to one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network, such as a direct physical connection, a virtual network, and / or the like.

[0025] Wireless network 100 can also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. In Figure 1 In the example shown, a relay station 1 lOd can communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, a relay base station, a relay, and / or the like.

[0026] Wireless network 100 can be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and / or the like. These different types of BSs can have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100. For example, macro BSs can have a high transmit power level (e.g., 5 to 40 Watts), whereas pico BSs, femto BSs, and relay BSs can have relatively lower transmit power levels (e.g., 0.1 to 2 Watts).

[0027] A network controller 130 can couple to a set of BSs and can provide coordination and control for these BSs. Network controller 130 can be in communication with the BSs via a backhaul. The BSs can also communicate with one another directly or indirectly via a wireless or wireline backhaul.

[0028] UEs 120 (e.g., 120a, 120b, 120c) can be dispersed throughout wireless network 100, and each UE can be stationary or mobile. A UE can also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc. A UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicular component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.

[0029] Some UEs can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, e.g., robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that can communicate with a base station, another device (e.g., remote device), or some other entity. A wireless node can provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs can be considered Internet-of-Things (IoT) devices, and / or can be implemented as NB-IoT (narrowband internet of things) devices. Some UEs can be considered customer premises equipment (CPE). UE 120 can be included in a housing that houses components of UE 120, such as processor components, memory components, and / or the like.

[0030] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a particular RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, an air interface, etc. A frequency can also be referred to as a carrier, a frequency channel, etc. Each frequency can support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0031] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another). For example, the UEs 120 can communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, vehicle-to-everything (V2X) protocols (which can include car-to-car (V2V) or car-to-infrastructure (V2I) protocols), and / or a mesh network. In this case, the UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the base station 110.

[0032] Wireless communication devices, such as UEs 120, BSs 110, TRPs, etc., can communicate with one another using beams. Beams can be defined using transmission configuration indicator (TCI) states. A TCI state of a beam can indicate a source reference signal and a quasi co-location (QCL) type to be used for the beam. A QCL type can correspond to one or more QCL relationships that indicate how a source reference signal will be quasi co-located (QCLed) with a channel on the beam. Two antenna ports are QCLed if properties of a channel that conveys symbols on one antenna port (e.g., a channel on the beam) can be inferred from a channel that conveys symbols on another antenna port (e.g., the source reference signal). Examples of QCL relationships that can be bundled in a QCL type include Doppler shift, Doppler spread, average delay, delay spread, and spatial receive parameter. Thus, properties of the beam can be derived from properties of the source reference signal.

[0033] In some cases, the UEs 120 and the BSs 110 can perform beam management to establish and / or refine beams for communications between the UEs 120 and the BSs 110. Beam management can enable intra-cell mobility (e.g., when a physical direction of a UE 120 changes, when a cluster or blocking object in a channel changes, etc.) and inter-cell mobility (e.g., when a UE 120 hands over from one BS 110 to another BS 110 or to another wireless network in the wireless network 100), among other procedures.

[0034] As described above, Figure 1 are provided by way of example only. Other examples can differ and Figure 1 be described in relation to other examples described.

[0035] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which can be one of the base stations 110 and one of the UEs 120 described above in connection with FIG. 1. The base station 110 can be equipped with a plurality of antennas, and the UE 120 can be equipped with a plurality of antennas. Figure 1One or more user equipments (UEs) 120 are dispersed throughout the communication system 100 and each can be stationary or mobile. A UE 120 can also be referred to as a mobile station, a terminal, a subscriber unit, a station, etc. A UE can be a wireless communication device, a cellular phone, a personal computer, a tablet, etc. Each UE 120 can communicate with macro base stations 110 and / or small cell base stations 110a. In FIG. 1, a solid line with double arrows represents desired transmissions between a UE 120 and a serving base station 110, which is a base station selected by the UE 120 to serve the UE 120. A dashed line with double arrows represents

[0036] At base station 110, a transmit processor 220 can receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. Transmit processor 220 can also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.) and provide overhead symbols and control symbols. Transmit processor 220 can also generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and can provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 can process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t can be transmitted via T antennas 234a through 234t, respectively. According to various aspects described in more detail below, synchronization signals can be generated with location encoding to convey additional information.

[0037] At the UE 120, the antennas 252a through 252r can receive the downlink signals from the base station 110 and / or other base stations and can provide received signals to the demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 can obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor can determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 can be included in a housing.

[0038] On the uplink, at the UE 120, a transmit processor 264 can receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.) from the controller / processor 280. Transmit processor 264 can also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 can be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, the uplink signals from the UE 120 and other UEs can be received by the antennas 234, processed by the demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 can provide the decoded data to a data sink 239 and the decoded control information to a controller / processor 240. The base station 110 can include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 can include a communication unit 294, a controller / processor 290, and a memory 292.

[0039] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component may perform one or more techniques associated with determining the applicable time of the Path Loss Reference Signal (PLRS), as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component can execute or direct, for example Figure 3 The operation of process 300 and / or other processes described herein. Memory 242 and 282 may store data and program code of base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120, one or more instructions may execute or direct, for example... Figure 3 The process 300 and / or other processes described herein. Scheduler 246 can schedule data transmission for the UE on the downlink and / or uplink.

[0040] In some aspects, UE 120 may include components for receiving an activation command for the PLRS, and components for using the PLRS to estimate path loss at least in part based on the applicable time of the PLRS, which instructs the PLRS to be ready for estimating path loss, etc. In some aspects, such components may include combinations of... Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0041] As mentioned above, Figure 2 Provided as an example. Other examples may be provided with reference to [the example]. Figure 2 The descriptions are different.

[0042] In some situations, the UE's beam configuration may change frequently. For example, the UE may encounter frequent congestion, or it may rapidly change position or orientation. When the beam changes, the BS can switch the active beam configuration from one beam configuration to another. For example, the beam configuration may include PLRS configuration, etc. This can be referred to as activating the PLRS configuration. In some aspects, the BS and / or UE can use PLRS to track, manage, and compensate for the mobility of the BS and / or UE in the wireless network. For example, the BS can configure PLRS parameters that indicate the time-frequency resources and / or beams on which the BS will transmit PLRS, configuring periodic, semi-persistent, or non-periodic transmission of PLRS, etc.

[0043] A UE can determine a time at which a PLRS is ready for use in estimating a path loss of a channel. This time can be referred to as an applicable time or application time of the PLRS. The UE can determine the applicable time of the PLRS based at least in part on whether a TCI state configured for the PLRS is known or unknown to the UE. For example, when the TCI state is unknown to the UE, the applicable time of the PLRS can be longer to allow sufficient time for a beam refinement operation.

[0044] However, in some cases, a PLRS, such as a synchronization signal block (SSB) or a periodic channel state information reference signal (CSI-RS), can not be configured with a TCI state. Thus, the UE can not be able to determine an applicable time of some PLRSs. This can impair path loss estimation, delay path loss estimation, impair communication performance (e.g., due to an inappropriate power control configuration), and / or the like. Some techniques and apparatuses described herein enable a UE (e.g., UE 120) to determine an applicable time of a PLRS that is not configured with a TCI state.

[0045] In some aspects, the BS 110 can transmit (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and / or the like) and the UE 120 can receive (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, reception component 404, and / or the like) an activation command (e.g., an activation command of a PLRS configuration) of a PLRS. For example, the UE 120 can receive the activation command via a medium access control element (MAC-CE). The activation command can involve activating a PLRS or updating an activated PLRS. In some aspects, the PLRS to be activated is not configured with a TCI state. For example, the PLRS can be an SSB or a CSI-RS (e.g., a periodic CSI-RS).

[0046] In some aspects, the UE 120 can determine (e.g., using controller / processor 280, determining component 406, etc.) a time of applicability of the PLRS, which can be configured without a TCI state. In some aspects, when the PLRS is configured with a TCI state and the TCI state is known to the UE 120, the UE 120 can determine the time of applicability according to criteria used by the UE 120 to determine the time of applicability. For example, the UE 120 can determine the time of applicability of the PLRS to be after (e.g., in the next slot) the UE 120 transmits acknowledgment (ACK) feedback of the activation command. As another example, the UE 120 can determine the time of applicability of the PLRS to be after (e.g., in the next slot) the UE 120 takes a threshold number of PLRS measurement samples. In some aspects, for example, the threshold number of measurement samples is a fifth measurement sample.

[0047] In some aspects, the counting of the threshold number of measurement samples starts after the UE 120 transmits ACK feedback of the activation command (e.g., after the UE 120 transmits ACK feedback of a physical downlink shared channel (PDSCH) carrying a MAC-CE of the activation command indicating the PLRS). In other words, the UE 120 can start counting measurement samples at the first measurement sample after the ACK feedback of the activation command is delivered (e.g., for counting up to the threshold number of measurement samples).

[0048] In some aspects, when the PLRS is configured with a TCI state and the TCI state is unknown to the UE 120, the UE 120 can determine the time of applicability of the PLRS according to criteria used by the UE 120 to determine the time of applicability. For example, the UE 120 can determine the time of applicability of the PLRS to be after (e.g., in the next slot) a particular duration after the UE 120 takes a threshold number of PLRS measurement samples (or after a particular duration after the UE transmits ACK feedback of the activation command), as described above. In some aspects, the particular duration corresponds to a duration used for layer 1 (Ll) reference signal received power (RSRP) reporting (e.g., T L1-RSRP ) as defined in 3GPP Technical Specification 38.133 section 8.10.3.

[0049] In some aspects, the UE 120 can determine the applicable time for the PL RS based at least in part on whether the PL RS is known or unknown to the UE 120. In some aspects, the UE 120 can determine that the PL RS is known when an activation command for the PL RS is received during a particular time period (e.g., the last X seconds) from a last transmission of the PL RS by the BS 110. Additionally, or alternatively, the UE 120 can determine that the PL RS is known when the UE 120 has previously transmitted at least one measurement report for the PL RS. Additionally, or alternatively, the UE 120 can determine that the PL RS is known when at least one of the PL RS or a QCLed source SSB is detectable by the UE 120 during a switching period associated with the PL RS (e.g., a switching period for the UE 120 to switch from a previously active PL RS to the PL RS) and a signal-to-noise (SNR) ratio associated with the PL RS satisfies a threshold. In some aspects, the threshold for the SNR ratio is -3 decibels (i.e., SNR > -3 decibels).

[0050] In some aspects, the UE 120 can determine that the PL RS is known to the UE 120 (e.g., according to the criteria described above). In this case, when the PL RS is configured with a TCI state and the TCI state is known to the UE 120, the UE 120 can determine the applicable time according to the criteria used by the UE 120 to determine the applicable time, as described above. For example, when the PL RS is known to the UE 120, the UE 120 can determine that the applicable time for the PL RS is after the UE 120 takes a threshold number of PL RS measurement samples (e.g., after taking the fifth measurement sample, starting from sending ACK feedback for the activation command), as described above.

[0051] In some aspects, the UE 120 can determine that the PL RS is unknown to the UE 120 (e.g., when none of the criteria described above for determining when the PL RS is known are satisfied). In this case, when the PL RS is configured with a TCI state and the TCI state is unknown to the UE 120, the UE 120 can determine the applicable time for the PL RS according to the criteria used by the UE 120 to determine the applicable time, as described above. For example, when the PL RS is unknown to the UE 120, the UE 120 can determine that the applicable time for the PL RS is after a particular duration after the UE 120 takes a threshold number of PL RS measurement samples, as described above.

[0052] In some aspects, when the PLRS is a PLRS of a particular physical layer type, such as an SSB or a periodic CSI-RS, the UE 120 can determine a time of applicability of the PLRS, as described above. In some aspects, the UE 120 can determine (e.g., using controller / processor 280, determining component 406, etc.) that the time of applicability of the PLRS has occurred. For example, the UE 120 can determine that the UE 120 has taken a threshold number of measurement samples. As another example, the UE 120 can determine that the UE 120 has taken a threshold number of measurement samples and that a particular duration of time has passed after taking the threshold number of measurement samples. In this case, the UE 120 can estimate (e.g., using controller / processor 280, determining component 406, etc.) a path loss (e.g., of a channel) using the PLRS activated by the activation command. In this way, the accuracy of the path loss estimate can be improved.

[0053] Figure 3 FIG. 3 is a diagram illustrating an example process 300 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 300 is an example of operations performed by a UE (e.g., UE 120, etc.) related to determining a time of applicability of a PLRS.

[0054] As further shown, in some aspects, process 300 can include receiving an activation command for a PLRS (block 310). For example, the UE (e.g., using antenna(s) 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) can receive an activation command for a PLRS, as described above. Figure 3

[0055] As further shown, in some aspects, process 300 can include estimating a path loss using the PLRS based at least in part on a time of applicability of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss (block 320). For example, the UE (e.g., using controller / processor 280, etc.) can estimate a path loss using the PLRS based at least in part on a time of applicability of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss, as described above. Figure 3 Process 300 can include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described herein.

[0056] In a first aspect, the PLRS is an SSB or a periodic CSI-RS. In a second aspect, alone or in combination with the first aspect, the activation command for the PLRS is received via a MAC-CE.

[0057]

[0058] ​​In a third aspect, alone or in combination with one or more of the first and second aspects, the applicable time is after a particular duration after acknowledgment feedback of the activation command is delivered. In a fourth aspect, alone or in combination with one or more of the first and third aspects, the applicable time is after a threshold number of PLRS measurement samples are taken. In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, counting of the threshold number of PLRS measurement samples begins after acknowledgment feedback of the activation command is delivered.

[0059] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the applicable time is after a particular duration after a threshold number of PLRS measurement samples are taken. In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the particular duration corresponds to a duration for L1 RSRP reporting.

[0060] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the applicable time is based at least in part on a determination of whether the PLRS is known or unknown to the UE. In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the PLRS is determined to be known to the UE when at least one of: an activation command for the PLRS is received during a particular time period from a last transmission of the PLRS, at least one measurement report for the PLRS has been sent, or at least one of the PLRS or a QCLed source SSB is detectable during a switch associated with the PLRS and a SNR ratio associated with the PLRS satisfies a threshold.

[0061] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the PLRS is determined to be known to the UE and the applicable time is after a threshold number of PLRS measurement samples are taken. In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, counting of the threshold number of PLRS measurement samples begins after acknowledgment feedback of the activation command is delivered.

[0062] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the PLRS is determined to be unknown to the UE and the applicable time is after a particular duration after a threshold number of PLRS measurement samples are taken. In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the particular duration corresponds to a duration for L1 RSRP reporting.

[0063] Although Figure 3 Example blocks of the process 300 are shown, but in some aspects, the process 300 can include additional blocks not shown in the figure, can omit some or all of the blocks described in the figure, or can perform one or more blocks in a different order than the order shown in the figure. Figure 3The blocks depicted in the process can be compared to additional blocks, fewer blocks, different blocks, or blocks with different arrangements. Alternatively or alternatively, two or more blocks of process 300 can be executed in parallel.

[0064] Figure 4 This is a data flow diagram 400 illustrating the data flow between different components in the illustrated example device 402. Device 402 may be a UE (e.g., UE 120). In some aspects, device 402 includes a receiving component 404, a determining component 406, and / or a transmitting component 408.

[0065] like Figure 4 As shown, receiving component 404 can receive activation commands for PLRS (e.g., not configured with a TCI state). For example, receiving component 404 can receive activation commands from device 450 (e.g., BS 110). Receiving component 404 can provide information related to the activation command for PLRS to determining component 406.

[0066] The determining component 406 can determine the applicable time of the PLRS. Furthermore, the determining component 406 can use the PLRS (e.g., based at least in part on one or more measurement samples of the PLRS) and estimate the path loss based on the applicable time of the PLRS. The determining component 406 can also determine uplink power control parameters, etc., for transmitting uplink data, based at least in part on the estimated path loss. The determining component 406 can provide the transmitting component 408 with information related to the uplink power control parameters, the estimated path loss, etc.

[0067] The transmission component 408 can transmit uplink transmissions at least in part based on uplink power control parameters, estimated path loss, etc. For example, the transmission component 408 can transmit uplink transmissions to the device 450.

[0068] Device 402 may include performing the aforementioned Figure 3 Additional components of each block of the algorithm in process 300. The aforementioned Figure 3 Each block in process 300, etc., can be executed by a component, and device 402 can include one or more of these components. A component can be one or more hardware components specifically configured to execute the process / algorithm, implemented by a processor configured to execute the process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof.

[0069] Figure 4 The number and arrangement of components shown are provided as an example. In fact, with... Figure 4 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged differently. Furthermore, Figure 4two or more components illustrated in FIG. 4A can be implemented within a single component, or Figure 4 a single component illustrated in FIG. 4A can be implemented as multiple, distributed components. Additionally or alternatively, Figure 4 a set of one or more components illustrated in FIG. 4A can perform one or more functions described as being performed by Figure 4 another set of one or more components illustrated in FIG. 4A.

[0070] Figure 5 is a diagram 500 illustrating an example of a hardware implementation for an apparatus 402' for processing system 502. The apparatus 402' can be a UE (e.g., UE 120).

[0071] The processing system 502 can be implemented with a bus architecture, as represented generally by the bus 504. The bus 504 can include any number of interconnecting buses and bridges depending on the specific application of the processing system 502 and the overall design constraints. The bus 504 links together various circuits including one or more processors and / or hardware components represented by the processor 506, the components 404, 406, and / or 408, and the computer-readable medium / memory 508. The bus 504 can also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

[0072] The processing system 502 can be coupled to a transceiver 510. The transceiver 510 is coupled to one or more antennas 512. The transceiver 510 provides a means for communicating with various other apparatus over a transmission medium. The transceiver 510 receives a signal from the one or more antennas 512, extracts information from the received signal, and provides the extracted information to the processing system 502, specifically the reception component 404. In addition, the transceiver 510 receives information from the processing system 502, specifically the transmission component 408, and based at least in part on the received information, generates a signal to be applied to the one or more antennas 512. The processing system 502 includes a processor 506 coupled to a computer-readable medium / memory 508. The processor 506 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 508. The software, when executed by the processor 506, causes the processing system 502 to perform the various functions described herein for any particular apparatus. The computer-readable medium / memory 508 can also be used for storing data that is manipulated by the processor 506 when executing software. The processing system further includes at least one of the components 404, 406, and / or 408. The components can be software modules running in the processor 506, resident / stored in the computer-readable medium / memory 508, one or more hardware modules coupled to the processor 506, or some combination thereof. The processing system 502 can be a component of the UE 120 and can include the memory 282 and / or at least one of the TX MIMO processor 266, the receive processor 258, and / or the controller / processor 280.

[0073] In some aspects, the apparatus 402 / 402' for wireless communication includes means for receiving an activation command for a PLRS, means for estimating a path loss using the PLRS based at least in part on a time of applicability of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss, etc. The aforementioned means can be one or more of the aforementioned components of the apparatus 402 and / or the processing system 502 of the apparatus 402' configured to perform the functions recited by the aforementioned means. As described elsewhere herein, the processing system 502 can include the TX MIMO processor 266, the receive processor 258, and / or the controller / processor 280. In one configuration, the aforementioned means can be the TX MIMO processor 266, the receive processor 258, and / or the controller / processor 280 configured to perform the functions and / or operations recited herein.

[0074] Figure 5 are provided by way of example. Other examples can differ Figure 5 from the described examples.

[0075] The following provides an overview of various aspects of the disclosure:

[0076] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving an activation command for a path loss reference signal (PLRS); and estimating a path loss using the PLRS based at least in part on a time of applicability of the PLRS indicating a time at which the PLRS is ready for use in estimating the path loss.

[0077] Aspect 2: The method of aspect 1, wherein the PLRS is a synchronization signal block or a periodic channel state information reference signal.

[0078] Aspect 3: The method of any of aspects 1-2, wherein the activation command for the PLRS is received via a medium access control element.

[0079] Aspect 4: The method of any of aspects 1-3, wherein the time of applicability is after a particular duration after an acknowledgement feedback of the activation command.

[0080] Aspect 5: The method of any of aspects 1-4, wherein the time of applicability is after a threshold number of PLRS measurement samples are taken.

[0081] Aspect 6: The method of any of aspects 1-5, wherein a count of the threshold number of PLRS measurement samples starts after an acknowledgement feedback of the activation command.

[0082] Aspect 7: The method of any of aspects 1-6, wherein the time of applicability is after a particular duration after the threshold number of PLRS measurement samples are taken.

[0083] Aspect 8: The method of aspect 7, wherein the particular duration corresponds to a duration for a layer 1 reference signal received power report.

[0084] Aspect 9: The method of any of aspects 1-8, wherein the time of applicability is based at least in part on a determination of whether the PLRS is known or unknown to the UE.

[0085] Aspect 10: The method of aspect 9, wherein the PLRS is determined to be known to the UE when at least one of: the activation command for the PLRS is received during a particular time period from a last transmission of the PLRS, at least one measurement report for the PLRS has been sent, or at least one of the PLRS or a quasi co-located synchronization signal block is detectable during a switching cycle associated with the PLRS and a signal-to-noise ratio associated with the PLRS satisfies a threshold.

[0086] Aspect 11: The method of any of aspects 9-10, wherein the PLRS is determined to be known to the UE and the applicable time is after a threshold number of PLRS measurement samples are taken.

[0087] Aspect 12: The method of aspect 11, wherein the counting of the threshold number of PLRS measurement samples starts after delivery of acknowledgment feedback of the activation command.

[0088] Aspect 13: The method of any of aspects 9-10, wherein the PLRS is determined to be unknown to the UE and the applicable time is after a particular duration after the threshold number of PLRS measurement samples are taken.

[0089] Aspect 14: The method of any of aspects 1-10, wherein the particular duration corresponds to a duration for a layer 1 reference signal received power report.

[0090] Aspect 15: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of aspects 1-14.

[0091] Aspect 16: A device for wireless communication comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more of aspects 1-14.

[0092] Aspect 17: An apparatus for wireless communication comprising at least one means for performing the method of one or more of aspects 1-14.

[0093] Aspect 18: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of aspects 1-14.

[0094] Aspect 19: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of aspects 1-14.

[0095] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations can be possible based on the above disclosure or from practice of the aspects.

[0096] As used herein, the term “component” is intended to be broadly interpreted to include hardware, firmware, or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, or a combination of hardware and software.

[0097] As used herein, meeting a threshold can refer to a value that is greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc., depending on the context.

[0098] It will be apparent that systems and / or methods described herein can be implemented in different forms of hardware, firmware, or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and / or methods were described herein without reference to specific software code — it being understood that software and hardware can be designed to implement the systems and / or methods based, at least in part, on the description herein.

[0099] While specific combinations of features are recited in the claims and / or described in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features can be combined in ways not specifically recited in the claims and / or described in the specification. Although each dependent claim listed below can directly depend on only one claim, the disclosure of each aspect includes combinations of each dependent claim with each other claim in the set of claims. Phrases such as “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, a-b, a-c, b-c, and a-b-c, as well as any combination of the items with multiple instances of the same item (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other sequence of a, b, and c with any number of repetitions of a, b, and c).

[0100] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, “a” and “an” are intended to include one or more items, and can be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, or the like), and can be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: Activation command for Receive Path Loss Reference Signal (PLRS); as well as Upon receiving the activation command, the path loss is estimated using the PLRS at least in part based on the applicable time of the PLRS, which instructs the PLRS to be ready for path loss estimation, wherein the applicable time is at least in part based on the determination of whether the PLRS is known or unknown to the UE, wherein the PLRS is determined to be known to the UE when the PLRS is detectable during the handover period associated with the PLRS and the signal-to-noise ratio associated with the PLRS meets a threshold.

2. The method according to claim 1, wherein, PLRS is a synchronization signal block or a periodic channel state information reference signal.

3. The method according to claim 1, wherein, The PLRS activation command is received via the Media Access Control control element.

4. The method according to claim 1, wherein, The applicable timeframe is a specific duration following the confirmation feedback after the delivery of the activation command.

5. The method according to claim 1, wherein, The applicable timeframe is after obtaining the threshold number of PLRS measurement samples.

6. The method according to claim 5, wherein, The counting of PLRS measurement samples with a threshold number begins after confirmation feedback of the delivery activation command.

7. The method according to claim 1, wherein, The applicable time is after a specific duration following the acquisition of a threshold number of PLRS measurement samples.

8. The method according to claim 7, wherein, The specific duration corresponds to the duration used for Layer 1 reference signal received power reporting.

9. The method according to claim 1, wherein, The determination that PLRS is known to the UE is based at least in part on whether the Transmission Configuration Indicator (TCI) state configured for PLRS is known to the UE.

10. The method according to claim 1, wherein, The determination that PLRS is known to the UE is further based at least in part on the determination that the UE has sent at least one measurement report of PLRS.

11. The method according to claim 1, wherein, PLRS is determined to be known to the UE, and the applicable time is after obtaining a threshold number of PLRS measurement samples.

12. The method according to claim 11, wherein, The counting of PLRS measurement samples with a threshold number begins after confirmation feedback of the delivery activation command.

13. The method according to claim 1, wherein, PLRS is determined to be unknown to the UE, and the applicable time is after a specific duration following the acquisition of a threshold number of PLRS measurement samples.

14. The method according to claim 13, wherein, The specific duration corresponds to the duration used for Layer 1 reference signal received power reporting.

15. The method according to claim 1, wherein, PLRS is not configured with the Transport Configuration Indicator (TCI) status.

16. A user equipment (UE) for wireless communication, comprising: One or more memory units; as well as One or more processors, coupled to the one or more memories, are configured to: Activation command for Receive Path Loss Reference Signal (PLRS); as well as Upon receiving the activation command, the path loss is estimated using the PLRS at least in part based on the applicable time of the PLRS, which instructs the PLRS to be ready for path loss estimation, wherein the applicable time is at least in part based on the determination of whether the PLRS is known or unknown to the UE, wherein the PLRS is determined to be known to the UE when the PLRS is detectable during the handover period associated with the PLRS and the signal-to-noise ratio associated with the PLRS meets a threshold.

17. The UE according to claim 16, wherein, PLRS is a synchronization signal block or periodic channel state information reference signal.

18. The UE according to claim 16, wherein, The PLRS activation command is received via the Media Access Control control element.

19. The UE according to claim 16, wherein, The applicable timeframe is a specific duration following the confirmation feedback after the delivery of the activation command.

20. The UE according to claim 16, wherein, The applicable timeframe is after obtaining the threshold number of PLRS measurement samples.

21. The UE according to claim 20, wherein, The counting of PLRS measurement samples with a threshold number begins after confirmation feedback of the delivery activation command.

22. The UE according to claim 16, wherein, The applicable time is after a specific duration following the acquisition of a threshold number of PLRS measurement samples.

23. The UE according to claim 22, wherein, The specific duration corresponds to the duration used for Layer 1 reference signal received power reporting.

24. The UE according to claim 16, wherein, The determination that PLRS is known to the UE is based at least in part on whether the Transmission Configuration Indicator (TCI) state configured for PLRS is known to the UE.

25. The UE according to claim 16, wherein, The determination that PLRS is known to the UE is further based at least in part on the determination that the UE has sent at least one measurement report of PLRS.

26. The UE according to claim 16, wherein, PLRS is determined to be known to the UE, and the applicable time is after obtaining a threshold number of PLRS measurement samples.

27. The UE according to claim 26, wherein, The counting of PLRS measurement samples with a threshold number begins after confirmation feedback of the delivery activation command.

28. The UE according to claim 16, wherein, PLRS is determined to be unknown to the UE, and the applicable time is after a specific duration following the acquisition of a threshold number of PLRS measurement samples.

29. The UE according to claim 28, wherein, The specific duration corresponds to the duration used for Layer 1 reference signal received power reporting.

30. The UE according to claim 16, wherein, PLRS is not configured with the Transport Configuration Indicator (TCI) status.

31. An apparatus for wireless communication, comprising: A component used to receive the activation command of the Path Loss Reference Signal (PLRS); as well as A component for estimating path loss using PLRS after receiving the activation command, based at least in part on an applicable time for PLRS that instructs PLRS to be ready for path loss estimation, wherein the applicable time is based at least in part on determining whether PLRS is known or unknown to the device, wherein PLRS is determined to be known to the device when PLRS is detectable during a switching cycle associated with PLRS and the signal-to-noise ratio associated with PLRS meets a threshold.

32. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions, when executed by one or more processors of the user equipment (UE), cause the UE to: Activation command for Receive Path Loss Reference Signal (PLRS); as well as Upon receiving the activation command, the path loss is estimated using the PLRS at least in part based on the applicable time of the PLRS, which instructs the PLRS to be ready for path loss estimation, wherein the applicable time is at least in part based on the determination of whether the PLRS is known or unknown to the UE, wherein the PLRS is determined to be known to the UE when the PLRS is detectable during the handover period associated with the PLRS and the signal-to-noise ratio associated with the PLRS meets a threshold.

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