Periodic reference signals in a power saving mode

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a power saving mode of the base station for communicating with a base station. The UE may communicate with the base station, with the communicating including transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. Numerous other aspects are provided.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and specifically to techniques and apparatuses for communicating periodic reference signals while in a power saving mode.

BACKGROUND

In some networks, network devices such as base stations may manage wireless communications using an unnecessary amount of power consumption. In some networks, the network devices may have power constraints that limit an amount of power resources available to the network devices to manage the wireless communications. The network devices may support changing communication parameters that are associated with different power consumption rates based at least in part on power constraints or a determination that power consumption can be reduced while managing current wireless communications, among other examples. A base station may indicate, to a UE, values of the communication parameters to apply to a subsequent communication based at least in part on a power consumption rate. However, indicating the values for the communication parameters consumes communication, computing, network, or power resources of the UE or the base station. Additionally or alternatively, dynamic signaling, such as a downlink control information message, may have limited information fields for carrying the values for the communication parameters for the subsequent communication. In this way, the base station may be unable to realize potential power saving that the base station may otherwise support.

SUMMARY

Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include receiving an indication of a power saving mode of a base station. The method may include communicating with the base station, the communicating comprising, transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

Some aspects described herein relate to a method of wireless communication performed by a base station. The method may include transmitting an indication of a power saving mode of the base station for communicating with a UE. The method may include communicating with the UE, the communicating comprising, transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

Some aspects described herein relate to a UE for wireless communication. The user equipment may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to receive an indication of a power saving mode of a base station. The one or more processors may be configured to communicate with the base station, the communication comprising transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

Some aspects described herein relate to a base station for wireless communication. The base station may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit an indication of a power saving mode of the base station for communicating with a UE. The one or more processors may be configured to communicate with the UE, comprising transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive an indication of a power saving mode of a base station. The set of instructions, when executed by one or more processors of the UE, may cause the UE to communicate with the base station, the communicating comprising.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a base station. The set of instructions, when executed by one or more processors of the base station, may cause the base station to transmit an indication of a power saving mode of the base station for communicating with a UE. The set of instructions, when executed by one or more processors of the base station, may cause the base station to communicate with the UE, the communicating comprising.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving an indication of a power saving mode of the base station for communicating with a base station. The apparatus may include means for communicating with the base station, the communicating comprising, means for transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or means for receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting an indication of a power saving mode of the base station for communicating with a UE. The apparatus may include means for communicating with the UE, the communicating comprising, means for transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or means for receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, or processing system as substantially described with reference to and as illustrated by the drawings and specification.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and are not to be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art may 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 may be implemented or a method may be practiced using any quantity 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. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

Various aspects relate generally to communicating periodic reference signals (for example, uplink reference signals or downlink reference signals) while operating in a power saving mode. In some aspects, a base station indicates a power saving mode to a user equipment (UE). For example, the base station may indicate the power saving mode as a selection from a set of candidate power saving modes. The base station and UE may apply a power saving configuration of periodic reference signals based at least in part on the power saving mode of the base station. In some aspects, various power saving configurations of the periodic reference signals are associated with different respective power saving modes of the base station. For example, the periodic reference signals may be associated with a first power saving configuration that is active when a first power saving mode of the base station is active and may be associated with a second power saving configuration that is active when a second power saving mode of the base station is active. The power saving configurations may be associated with, for example, periodicities, repetition numbers, repetition patterns, or time gaps between repetitions of the periodic reference signals, among other examples. In some aspects, the periodic reference signals may include channel state information reference signals (CSI-RSs) or sounding reference signals (SRSs), among other examples.

Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, the described techniques can be used by a base station or a UE to conserve power resources associated with communicating periodic reference signals based at least in part on the base station operating in a power saving mode. Additionally or alternatively, the described techniques can be used by a base station or a UE to conserve network communication, power, or computing resources that may have otherwise been used to indicate values of parameters associated with communicating periodic reference signals while operating in the power saving mode.

A base station110may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs120with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs120with service subscription. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs120having association with the femto cell (for example, UEs120in a closed subscriber group (CSG)). A base station110for a macro cell may be referred to as a macro base station. A base station110for a pico cell may be referred to as a pico base station. A base station110for a femto cell may be referred to as a femto base station or an in-home base station.

The wireless network100may be a heterogeneous network that includes base stations110of different types, such as macro base stations, pico base stations, femto base stations, or relay base stations. These different types of base stations110may have different transmit power levels, different coverage areas, or different impacts on interference in the wireless network100. For example, macro base stations may have a high transmit power level (for example, 5 to 40 watts) whereas pico base stations, femto base stations, and relay base stations may have lower transmit power levels (for example, 0.1 to 2 watts). In the example shown inFIG.1, the BS110amay be a macro base station for a macro cell102a, the BS110bmay be a pico base station for a pico cell102b, and the BS110cmay be a femto base station for a femto cell102c. A base station may support one or multiple (for example, three) cells. A network controller130may couple to or communicate with a set of base stations110and may provide coordination and control for these base stations110. The network controller130may communicate with the base stations110via a backhaul communication link. The base stations110may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link.

In some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move in accordance with the location of a base station110that is mobile (for example, a mobile base station). In some examples, the base stations110may be interconnected to one another or to one or more other base stations110or network nodes (not shown) in the wireless network100through various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.

The wireless network100may include one or more relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (for example, a base station110or a UE120) and send a transmission of the data to a downstream station (for example, a UE120or a base station110). A relay station may be a UE120that can relay transmissions for other UEs120. In the example shown inFIG.1, the BS110d(for example, a relay base station) may communicate with the BS110a(for example, a macro base station) and the UE120din order to facilitate communication between the BS110aand the UE120d. A base station110that relays communications may be referred to as a relay station, a relay base station, or a relay.

The UEs120may be dispersed throughout the wireless network100, and each UE120may be stationary or mobile. A UE120may include, for example, an access terminal, a terminal, a mobile station, or a subscriber unit. A UE120may be a cellular phone (for example, 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, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (for example, a smart ring or a smart bracelet)), an entertainment device (for example, a music device, a 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 medium.

Some UEs120may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. An MTC UE or an eMTC UE may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, or a location tag, that may communicate with a base station, another device (for example, a remote device), or some other entity. Some UEs120may be considered Internet-of-Things (IoT) devices, or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs120may be considered a Customer Premises Equipment. A UE120may be included inside a housing that houses components of the UE120, such as processor components or memory components. In some examples, the processor components and the memory components may be coupled together. For example, the processor components (for example, one or more processors) and the memory components (for example, a memory) may be operatively coupled, communicatively coupled, electronically coupled, or electrically coupled.

In general, any quantity of wireless networks100may be deployed in a given geographic area. Each wireless network100may support a particular RAT and may operate on one or more frequencies. A RAT may be referred to as a radio technology or an air interface. A frequency may be referred to as a carrier or a frequency channel. Each frequency may 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 may be deployed.

In some examples, two or more UEs120(for example, shown as UE120aand UE120e) may communicate directly using one or more sidelink channels (for example, without using a base station110as an intermediary to communicate with one another). For example, the UEs120may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (for example, which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol), or a mesh network. In such examples, a UE120may perform scheduling operations, resource selection operations, or other operations described elsewhere herein as being performed by the base station110.

In some aspects, the UE120may include a communication manager140. As described in more detail elsewhere herein, the communication manager140may receive an indication of a power saving mode of a base station; and communicate with the base station, the communicating comprising: transmit one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receive the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. Additionally or alternatively, the communication manager140may perform one or more other operations described herein.

In some aspects, the base station110may include a communication manager150. As described in more detail elsewhere herein, the communication manager150may transmit an indication of a power saving mode of the base station for communicating with a UE; and communicate with the UE, the communicating comprising: transmit one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receive the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. Additionally or alternatively, the communication manager150may perform one or more other operations described herein.

In some aspects, the UE120may include a communication manager140. As described in more detail elsewhere herein, the communication manager140may receive an indication of a power saving mode of a base station; and communicate with the base station, the communicating comprising: transmit one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receive the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. Additionally or alternatively, the communication manager140may perform one or more other operations described herein.

In some aspects, the base station110may include a communication manager150. As described in more detail elsewhere herein, the communication manager150may transmit an indication of a power saving mode of the base station for communicating with a UE; and communicate with the UE, the communicating comprising: transmit one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receive the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. Additionally or alternatively, the communication manager150may perform one or more other operations described herein.

In some aspects, the UE120may include a communication manager140. As described in more detail elsewhere herein, the communication manager140may receive an indication of a power saving mode of a base station; and communicate with the base station, the communicating comprising: transmit one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receive the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. Additionally or alternatively, the communication manager140may perform one or more other operations described herein.

In some aspects, the base station110may include a communication manager150. As described in more detail elsewhere herein, the communication manager150may transmit an indication of a power saving mode of the base station for communicating with a UE120; and communicate with the UE120, the communicating comprising: transmit one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receive the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. Additionally or alternatively, the communication manager150may perform one or more other operations described herein.

FIG.2is a diagram illustrating an example base station in communication with a UE in a wireless network in accordance with the present disclosure. The base station may correspond to the base station110ofFIG.1. Similarly, the UE may correspond to the UE120ofFIG.1. The base station110may be equipped with a set of antennas234athrough234t, such as T antennas (T≥1). The UE120may be equipped with a set of antennas252athrough252r, such as R antennas (R≥1).

At the base station110, a transmit processor220may receive data, from a data source212, intended for the UE120(or a set of UEs120). The transmit processor220may select one or more modulation and coding schemes (MCSs) for the UE120based at least in part on one or more channel quality indicators (CQIs) received from that UE120. The base station110may process (for example, encode and modulate) the data for the UE120based at least in part on the MCS(s) selected for the UE120and may provide data symbols for the UE120. The transmit processor220may process system information (for example, for semi-static resource partitioning information (SRPI)) and control information (for example, CQI requests, grants, or upper layer signaling) and provide overhead symbols and control symbols. The transmit processor220may generate reference symbols for reference signals (for example, a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (for example, a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor230may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, or the reference symbols, if applicable, and may provide a set of output symbol streams (for example, T output symbol streams) to a corresponding set of modems232(for example, T modems), shown as modems232athrough232t. For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem232. Each modem232may use a respective modulator component to process a respective output symbol stream (for example, for OFDM) to obtain an output sample stream. Each modem232may further use a respective modulator component to process (for example, convert to analog, amplify, filter, or upconvert) the output sample stream to obtain a downlink signal. The modems232athrough232tmay transmit a set of downlink signals (for example, T downlink signals) via a corresponding set of antennas234(for example, T antennas), shown as antennas234athrough234t.

At the UE120, a set of antennas252(shown as antennas252athrough252r) may receive the downlink signals from the base station110or other base stations110and may provide a set of received signals (for example, R received signals) to a set of modems254(for example, R modems), shown as modems254athrough254r. For example, each received signal may be provided to a demodulator component (shown as DEMOD) of a modem254. Each modem254may use a respective demodulator component to condition (for example, filter, amplify, downconvert, or digitize) a received signal to obtain input samples. Each modem254may use a demodulator component to further process the input samples (for example, for OFDM) to obtain received symbols. A MIMO detector256may obtain received symbols from the modems254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. A receive processor258may process (for example, demodulate and decode) the detected symbols, may provide decoded data for the UE120to a data sink260, and may provide decoded control information and system information to a controller/processor280. The term “controller/processor” may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, or a CQI parameter, among other examples. In some examples, one or more components of the UE120may be included in a housing.

One or more antennas (for example, antennas234athrough234tor antennas252athrough252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, or an antenna array may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, or one or more antenna elements coupled to one or more transmission or reception components, such as one or more components ofFIG.2.

On the uplink, at the UE120, a transmit processor264may receive and process data from a data source262and control information (for example, for reports that include RSRP, RSSI, RSRQ, or CQI) from the controller/processor280. The transmit processor264may generate reference symbols for one or more reference signals. The symbols from the transmit processor264may be precoded by a TX MIMO processor266if applicable, further processed by the modems254(for example, for DFT-s-OFDM or CP-OFDM), and transmitted to the base station110. In some examples, the modem254of the UE120may include a modulator and a demodulator. In some examples, the UE120includes a transceiver. The transceiver may include any combination of the antenna(s)252, the modem(s)254, the MIMO detector256, the receive processor258, the transmit processor264, or the TX MIMO processor266. The transceiver may be used by a processor (for example, the controller/processor280) and the memory282to perform aspects of any of the methods described herein.

The controller/processor240of the base station110, the controller/processor280of the UE120, or any other component(s) ofFIG.2may perform one or more techniques associated with communicating periodic reference signals in a power saving mode, as described in more detail elsewhere herein. For example, the controller/processor240of the base station110, the controller/processor280of the UE120, or any other component(s) ofFIG.2may perform or direct operations of, for example, process700ofFIG.7, process800ofFIG.8, or other processes as described herein. The memory242and the memory282may store data and program codes for the base station110and the UE120, respectively. In some examples, the memory242or the memory282may include a non-transitory computer-readable medium storing one or more instructions (for example, code or program code) for wireless communication. For example, the one or more instructions, when executed (for example, directly, or after compiling, converting, or interpreting) by one or more processors of the base station110or the UE120, may cause the one or more processors, the UE120, or the base station110to perform or direct operations of, for example, process700ofFIG.7, process800ofFIG.8, or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, or interpreting the instructions, among other examples.

In some aspects, the UE includes means for receiving an indication of a power saving mode of a base station; or means for communicating with the base station, the communicating comprising: means for transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or means for receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. The means for the UE to perform operations described herein may include, for example, one or more of communication manager140, antenna252, modem254, MIMO detector256, receive processor258, transmit processor264, TX MIMO processor266, controller/processor280, or memory282.

In some aspects, the base station includes means for transmitting an indication of a power saving mode of the base station for communicating with a UE; or means for communicating with the UE, the communicating comprising: means for transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or means for receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. The means for the base station to perform operations described herein may include, for example, one or more of communication manager150, transmit processor220, TX MIMO processor230, modem232, antenna234, MIMO detector236, receive processor238, controller/processor240, memory242, or scheduler246.

FIG.3is a diagram illustrating an example300of reference signal repetitions in accordance with the present disclosure. Reference signals described in connection withFIG.3may include CSI-RSs or SRSs, among other examples. The reference signals may include uplink reference signals or downlink reference signals communicated between a base station and a UE. Additionally or alternatively, the reference signals may include sidelink reference signals communicated between UEs.

As shown in example300, the reference signals include a first set305of reference signal repetitions. The first set305includes multiple repetitions of a first reference signal transmitted in a pattern that includes resources that are adjacent in time. Similarly, a second set310of reference signal repetitions includes repetitions of a second reference signal transmitting in the same pattern that includes resources that are adjacent in time and a third set315of reference signal repetitions includes repetitions of a third reference signal transmitting in the same pattern that includes resources that are adjacent in time.

In some networks, each set of reference signal repetitions may be transmitting in a same pattern. The pattern may be configured to provide a level of improved reception and may result in consumption of an amount of power that is proportional to the level of improved reception. For example, the pattern may be configured to include a relatively high number of repetitions to provide a relatively high level of improved reception and cause the base station and the UE to consume a relatively high amount of power to transmit, receive, demodulate, and decode the reference signals. Alternatively, the pattern may be configured to include a relatively low number of repetitions to provide a relatively low level of improved reception and cause the base station and the UE to consume a relatively low amount of power to transmit, receive, demodulate, and decode the reference signals.

As shown in example300, the sets305,310,315of reference signal repetitions may be transmitted and received based at least in part on a reference signal period320and may have an associated reference signal periodicity. The reference signal period320may be configured to improve communications between the UE and the base station based at least in part on supporting channel estimation, mobility tracking, or phase tracking, among other examples. The periodicity may be configured to provide a level of improved communications and may result in consumption of an amount of power that is proportional to the level of improved communications. For example, the periodicity may be configured with a relatively small reference signal period320to provide a relatively high level of improved communications and cause the base station and the UE to consume a relatively high amount of power to transmit, receive, demodulate, and decode the reference signals. Alternatively, the periodicity may be configured with a relatively large reference signal period320to provide a relatively low level of improved communications and cause the base station and the UE to consume a relatively low amount of power to transmit, receive, demodulate, and decode the reference signals.

In some networks, network devices such as base stations may manage wireless communications using an unnecessary amount of power consumption (for example, based at least in part on an unnecessary level of improved reception or level of improved communications, among other examples). In some networks, the network devices may have power constraints that limit an amount of power resources available to the network devices to manage the wireless communications. The network devices may support changing communication parameters (for example, parameters for periodic reference signals) that are associated with different power consumption rates based at least in part on power constraints or a determination that power consumption can be reduced while managing current wireless communications, among other examples. The base station may indicate, to a UE, values of the communication parameters to apply to a subsequent communication based at least in part on a power consumption rate. However, indicating the values for the communication parameters consumes communication, computing, network, or power resources of the UE or the base station. Additionally or alternatively, dynamic signaling, such as a downlink control information message, may have limited information fields for carrying the values for the subsequent communication parameters. In this way, the base station may be unable to realize potential power saving that the base station may otherwise support.

Various aspects relate generally to communicating periodic reference signals (for example, uplink reference signals or downlink reference signals) in a power saving mode. Some aspects more specifically relate to the base station indicating a power saving mode to a UE and the base station, and UE applying power saving configurations of periodic reference signals based at least in part on the power saving mode of the base station. In some aspects, the periodic reference signals may be associated with different power saving configurations that are associated with different power saving configurations of the base station. For example, the periodic reference signals may be associated with a first configuration that is active when a first power saving mode of the base station is active and may be associated with a second configuration that is active when a second power saving mode of the base station is active. The power saving configurations may be associated with, for example, periodicities, repetition numbers, repetition patterns, or time gaps between repetitions of the one or more periodic reference signals, among other examples. In some aspects, the reference signals may include CSI-RSs or SRSs, among other examples.

Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, the described techniques can be used to conserve power resources based at least in part on the base station operating in a power saving mode, and to conserve network communication, power, or computing resources that may have otherwise been used to indicate values of parameters associated with the periodic reference signals.

FIG.4is a diagram illustrating an example400associated with communicating for periodic reference signals in a power saving mode, in accordance with the present disclosure. As shown inFIG.4, a base station (for example, base station110) may communicate with a UE (for example, UE120). In some aspects, the base station and the UE may be part of a wireless network (for example, wireless network100). The UE and the base station may have established a wireless connection prior to operations shown inFIG.4. Although described in the context of communications between a UE and base station, aspects described herein may be applied to communications between other pairs of communication devices, such as a first UE and a second UE, in the scope of this disclosure.

In a first operation405, the base station may transmit, and the UE may receive, configuration information. In some aspects, the UE may receive the configuration information via one or more of radio resource control (RRC) signaling, one or more medium access control (MAC) control elements (CEs), or downlink control information (DCI), among other examples. In some aspects, the configuration information may include an indication of one or more configuration parameters (for example, already known to the UE) for selection by the UE, or explicit configuration information for the UE to use to configure the UE, among other examples.

In some aspects, the configuration information may indicate that the UE is to transmit an indication of support for communicating with the base station based at least in part on communication states, such as a power saving mode of the base station. In some aspects, the configuration information may indicate that the base station is to transmit, and the UE is to receive, an indication of a set of candidate communication states and associated parameters for communicating with the base station. For example, the configuration information may indicate that the UE is to apply a configuration for one or more periodic reference signals based at least in part on an active power saving mode as indicated by the base station.

The UE may configure itself based at least in part on the configuration information. In some aspects, the UE may be configured to perform one or more operations described herein based at least in part on the configuration information.

In a second operation410, the UE may transmit, and the base station may receive, an indication of support for communicating with the base station based at least in part on communication states. In some aspects, the UE may transmit the indication of support before receiving a portion of the configuration information described in connection with the first operation405. For example, the UE may receive a first portion of the configuration information that indicates that the UE is to transmit the indication of support and may receive a second portion of the configuration information that indicates a configuration for communication with the base station based on the communication states or power saving modes of the base station.

In a third operation415, the UE may receive, and the base station may transmit, an indication of candidate communication states and associated parameters for communicating with the base station. In some aspects, the indication of the candidate communication states and associated parameters may indicate a mapping of the candidate communication states to one or more parameters associated with communicating the one or more periodic reference signals. For example, the mapping may include an indication of, for each candidate communication state or power saving mode, a periodicity, a repetition number, a repetition pattern, or a time gap (for example, in units of symbols, sub-slots, or slots, among other examples) between repetitions of the one or more periodic reference signals. The one or more parameters may include a first set of parameters for communicating a first type of reference signals (for example, CSI-RSs) and a second set of parameters for communicating a second type of reference signals (for example, SRSs). Additionally or alternatively, the one or more parameters may include a single set of parameters for communicating multiple types of reference signals.

In a fourth operation420, the base station may determine a communication state to use for communicating with the UE or additional UEs served in a cell provided by the base station. For example, the base station may determine to use a communication state associated with a power saving mode of the base station. The base station may determine to apply the power saving mode of the base station based at least in part on power constraints that limit an amount of power resources available to the base station to manage the wireless communications or a determination that power consumption can be reduced while managing current wireless communications, among other examples. In some aspects, the base station may determine the power saving mode based at least in part on a number of UEs connected with the base station, an amount of traffic handled by the base station, a type of traffic handled by the base station, channel conditions for channels between the base station and the UE, or communication channels for UEs connected with the base station, among other examples.

In a fifth operation425, the UE may receive, and the base station may transmit, an indication of a communication state for communicating with the base station. In some aspects, the indication of the communication state may include an indication of a power saving mode of the base station. In some aspects, the indication of the communication state may indicate an active communication state from a set of candidate communication states (for example, as described in connection with the third operation415). In some aspects, the UE may receive the indication of the power saving mode via an explicit indication or via an indication of a change of the power saving mode relative to another power saving mode of the base station (for example, an indication to reduce or increase power from the other power saving mode).

In some aspects, the indication of the communication state may include an update from an additional communication state that was previously active. In some aspects, the communication state or the additional communication state may be associated with cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the power saving mode or a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the power saving mode. For example, a periodic reference signal (for example, periodic CSI-RS or periodic SRS) may be canceled for a first set of candidate communication states or power saving modes or may be canceled based at least in part on a change from a first candidate communication state to a second communication state. In some aspects, the canceled periodic reference signal may be activated based at least in part on an indication (for example, an explicit indication) of activation by the base station or based at least in part on changing to another candidate communication state to implicitly activate the canceled periodic reference signal. In some aspects, the sampling factor may be relative to a full power mode, to a power mode where power saving is not a primary basis for selecting communication parameters, or to a current, or previously active, power saving mode.

In some aspects, a sampling or upsampling factor (for example, based at least in part on a periodicity of the periodic reference signals) may be signaled. In some aspects, a periodic reference signal may be effectively canceled based at least in part on applying a sufficiently large upsampling factor. The sampling or upsampling factor may be indicated based at least in part on the communication state or power saving mode of the base station or by explicit signaling of the sampling, upsampling, or subsampling factors using layer 1 or layer 2 signaling.

In some aspects, the communication state or the power saving mode may be associated with a comb level of the one or more periodic reference signals. In some aspects, the communication state or the power saving mode may be associated with a comb offset of the one or more periodic reference signals. For example, the comb level or the comb offset may be associated with the configuration that is based at least in part on the power saving mode of the base station.

In some aspects, the base station may transmit (for example, in a separate message) an indication to associate, with the power saving mode of the base station, a periodicity, a repetition number, a repetition pattern, or a time gap between repetitions of the one or more periodic reference signals, among other examples. For example, the base station may transmit the indication of the power saving mode and may also (for example, in a separate message) transmit an indication of parameters of the one or more reference signals that are to change based at least in part on the indication of the power saving mode. In some aspects, the base station may transmit the indication of the parameters via layer 1 or layer 2 signaling, such as DCI or MAC CEs.

In some aspects, the configuration of the one or more periodic reference signals is associated with cancelation of a set of the one or more periodic reference signals. The cancelation may be based at least in part on one or more ports associated with the one or more periodic reference signals. For example, the configuration may indicate to cancel all periodic reference signal resources (and any corresponding report) for all resources with a number of ports that satisfies a threshold number, where the threshold number is based at least in part on the power saving mode or communication state.

In a sixth operation430, the UE may configure the UE based at least in part on the communication state. In some aspects, the UE may configure the UE further based at least in part on additional signaling from the base station. For example, the base station may transmit, in addition to the indication of the communication state, an indication of a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals, among other examples.

In a seventh operation435, the UE may transmit, and the base station may receive, one or more periodic reference signals having a configuration associated with the communication state. For example, the UE may transmit the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. The one or more periodic reference signals may include one or more SRSs, among other examples.

The configuration associated with the communication state may be associated with a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals, among other examples.

In some aspects, the UE may transmit the one or more periodic reference signals based at least in part receiving an indication to change to the power saving mode of the base station (for example, to change from a power saving mode in which the one or more periodic reference signals are canceled or have a sufficiently large upsampling number), receiving an indication to activate the one or more periodic reference signals, or receiving an indication to change the sampling factor of the one or more periodic reference signals to a sampling factor that is different from a sampling factor associated with the power saving mode, among other examples.

In an eighth operation440, the UE may receive, and the base station may transmit, an indication of a report configuration including an indication of multiple parameters for contents of the report. In some aspects, the report configuration may indicate a set of one or more candidate values of a timing offset between a symbol allocated for receiving the one or more periodic reference signals and a first uplink transmission symbol scheduled for transmitting a CSI-RS report associated with the one or more periodic reference signals. In some aspects, the configuration of the one or more periodic reference signals may be associated with (for example, may map to) the set of one or more candidate values of the timing offset between the symbol allocated for receiving the one or more periodic reference signals and the first uplink transmission symbol scheduled for transmitting the CSI-RS report associated with the one or more periodic reference signals.

In some aspects, the report configuration may indicate different report content to be included with the report based at least in part on the communication state or power saving mode. In some aspects, the report configuration may indicate candidate sets of report elements, the candidate sets of report elements selectable for inclusion in the report based at least in part on the power saving mode of the base station. For example, based at least in part on the base station being in a power saving mode configured to reduce power consumption, an amount of content or a payload size of the report may be reduced. Alternatively, based at least in part on the base station being in a power saving mode configured to improve communication at the expense of increased power consumption, an amount of content or a payload size of the report may be increased.

In a ninth operation445, the UE may receive, and the base station may transmit, the one or more periodic reference signals having a configuration associated with the communication state. For example, the UE may receive the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. The one or more periodic reference signals may include one or more CSI-RSs, among other examples.

The configuration associated with the communication state may be associated with a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals, among other examples.

In a tenth operation450, the UE may generate a reference signal report. In some aspects, the UE may include report elements based at least in part on the communication state or the power saving mode of the base station. For example, the UE may include report elements based at least in part on the report elements being mapped to the communication state or power saving mode, as indicated in the report configuration described in connection with the eighth operation440.

In some aspects, the report (for example, a CSI report) may be configured based at least in part on the power saving mode. In this way, a number of polar decoder cycles (a number of decoding iterations) may be reduced based at least in part on reducing payload sizes. The UE may transmit, based at least in part on the power saving mode or communication state, a compressed report that includes, for example, reduced contents based at least in part on dropping indications associated with subbands, channel quality index, or precoding matrix indicators, among other examples. In some aspects, the base station may indicate a configuration for each candidate power saving mode or communication state (for example, in a first communication), and the UE may select the configuration for a set of periodic reference signals based at least in part on an active power saving mode or communication state.

In an eleventh operation455, the UE may transmit the reference signal report having contents based at least in part on the communication state.

FIG.5is a diagram illustrating an example500associated with communicating periodic reference signals in a power saving mode, in accordance with the present disclosure. In example500, a base station (for example, base station110) may communicate with a UE (for example, UE120). In some aspects, the base station and the UE may be part of a wireless network (for example, wireless network100). The UE and the base station may have established a wireless connection prior to operations shown inFIG.5. Although described in the context of communications between a UE and base station, aspects described herein may be applied to communications between other pairs of communication devices, such as a first UE and a second UE, in the scope of this disclosure.

FIG.5illustrates a first example500of reference signal repetitions and a first reference signal period.FIG.5also illustrates a second example505of reference signal repetitions and a second reference signal period. Reference signals described in connection withFIG.5may include CSI-RSs or SRSs, among other examples. The reference signals may include uplink reference signals or downlink reference signals communicated between a base station and a UE. Additionally or alternatively, the reference signals may include sidelink reference signals communicated between UEs.

As shown in example500, a first set510of reference signal repetitions may include four reference signal repetitions in a pattern that includes resources that are adjacent in time. Similarly, a second set515and a third set520of reference signal repetitions may also include four reference signal repetitions in a pattern that includes resources that are adjacent in time. In some aspects, each set of reference signal repetitions may be transmitting in a same pattern based at least in part on signaling from a base station that the reference signals are communicated while the base station is in a first power saving mode or communication state. The pattern may be configured to provide a level of improved reception and may result in consumption of an amount of power that is proportional to the level of improved reception. For example, the pattern may be configured to include a relatively high number of repetitions to provide a relatively high level of improved reception and cause the base station and the UE to consume a relatively high amount of power to transmit, receive, demodulate, and decode the reference signals.

As shown in example500, the sets510,515,520of reference signal repetitions may be transmitted and received based at least in part on a reference signal period525and may have an associated reference signal periodicity. The reference signal period525may be configured to improve communications between the UE and the base station based at least in part on supporting channel estimation, mobility tracking, or phase tracking, among other examples. The periodicity may be configured to provide a level of improved communications and may result in consumption of an amount of power that is proportional to the level of improved communications. For example, the periodicity may be configured with a relatively small reference signal period525to provide a relatively high level of improved communications and cause the base station and the UE to consume a relatively high amount of power to transmit, receive, demodulate, and decode the reference signals.

As shown in example505, a first set530of reference signal repetitions may include two reference signal repetitions in a pattern that includes resources that are spaced by a gap in time. Similarly, a second set535of reference signal repetitions may also include two reference signal repetitions in a pattern that includes resources that are spaced by a gap in time. In some aspects, each set of reference signal repetitions may be transmitting in a same pattern based at least in part on signaling from a base station that the reference signals are communicated while the base station is in a second power saving mode or communication state. The pattern may be configured to include a relatively low number of repetitions to provide a relatively low level of improved reception and cause the base station and the UE to consume a relatively low amount of power to transmit, receive, demodulate, and decode the reference signals.

As shown in example505, the sets530,535of reference signal repetitions may be transmitted and received based at least in part on a reference signal period540and may have an associated reference signal periodicity. The reference signal period540may be configured to improve communications between the UE and the base station based at least in part on supporting channel estimation, mobility tracking, or phase tracking, among other examples. The periodicity may be configured with a relatively large reference signal period540to provide a relatively low level of improved communications and cause the base station and the UE to consume a relatively low amount of power to transmit, receive, demodulate, and decode the reference signals.

FIG.6is a diagram illustrating an example600associated with communicating periodic reference signals in a power saving mode, in accordance with the present disclosure. In example600, a base station (for example, base station110) may communicate with a UE (for example, UE120). In some aspects, the base station and the UE may be part of a wireless network (for example, wireless network100). The UE and the base station may have established a wireless connection prior to operations shown inFIG.6. Although described in the context of communications between a UE and base station, aspects described herein may be applied to communications between other pairs of communication devices, such as a first UE and a second UE, in the scope of this disclosure.

As shown in example600, a base station may transmit a physical downlink control channel (PDCCH) communication to a UE that schedules reference signals and a reference signal report. The PDCCH communication may indicate a timing offset605between a last PDCCH symbol and a first symbol allocated to the reference signal report (for example, a physical uplink shared channel (PUSCH) with CSI feedback). The PDCCH communication may also indicate a timing offset610between a last symbol allocated to communication of the reference signals (for example, CSI-reference signals) and the first symbol allocated to the reference signal report.

In some aspects, a set of candidate timing offsets for selection as the timing offset605may be based at least in part on a communication state or power saving mode of the base station. For example, minimum values for the set of the candidate timing offsets may be based at least in part on the communication state or power saving mode. In this way, the timing offset605may be a minimum value that corresponds to the power saving mode of the base station and a capability, when in the power saving mode, to process the reference signal report.

In some aspects, a set of candidate timing offsets for selection as the timing offset610may be based at least in part on a communication state or power saving mode of the base station. For example, minimum values for the set of the candidate timing offsets may be based at least in part on the communication state or power saving mode. In this way, the timing offset610may be a minimum value that corresponds to the power saving mode of the base station and a capability, when in the power saving mode, to process the reference signal report after transmitting the reference signals.

FIG.7is a flowchart illustrating an example process700performed, for example, by a UE in accordance with the present disclosure. Example process700is an example where the UE (for example, UE120) performs operations associated with periodic reference signals in a power saving mode.

As shown inFIG.7, in some aspects, process700may include receiving an indication of a power saving mode of a base station (block710). For example, the UE (such as by using communication manager140or reception component902, depicted inFIG.9) may receive an indication of a power saving mode of a base station, as described above.

As further shown inFIG.7, in some aspects, process700may include communicating with the base station, the communicating comprising: transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station (block720). For example, the UE (such as by using communication manager140, reception component902, or transmission component904depicted inFIG.9) may communicate with the base station, the communicating comprising: transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station, as described above.

Process700may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.

In a first additional aspect, the one or more periodic reference signals comprise one or more of CSI-RSs or SRSs.

In a second additional aspect, alone or in combination with the first aspect, the configuration is associated with one or more of a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals.

In a third additional aspect, alone or in combination with one or more of the first and second aspects, process700includes receiving an indication of an additional power saving mode of the base station (for example, where the power saving mode is a first power saving mode and the additional power saving mode is a second power saving mode) having an additional configuration (for example, where the configuration is a first configuration and the additional configuration is a second configuration) associated with one or more of cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the power saving mode, or a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the power saving mode.

In a fourth additional aspect, alone or in combination with one or more of the first through third aspects, transmitting the one or more periodic reference signals or receiving the one or more periodic reference signals is based at least in part on one or more of receiving an indication to change to the power saving mode of the base station from a previously active power saving mode of the base station, receiving an indication to activate the one or more periodic reference signals, or receiving an indication to change the sampling factor of the one or more periodic reference signals to a sampling factor that is different from a sampling factor associated with the power saving mode.

In a fifth additional aspect, alone or in combination with one or more of the first through fourth aspects, receiving the indication of the power saving mode of the base station comprises receiving one or both of an explicit indication, or an indication of a change of the power saving mode of the base station relative to another power saving mode of the base station. For example, the indication of the change of the power saving mode of the base station relative to another power saving mode of the base station may indicate to increase power saving or to decrease power consumption relative to a previously, or currently, active power saving mode.

In a sixth additional aspect, alone or in combination with one or more of the first through fifth aspects, the configuration is associated with a comb level of the one or more periodic reference signals that is based at least in part on the power saving mode of the base station, or the configuration is associated with a comb offset of the one or more periodic reference signals that is based at least in part on the power saving mode of the base station.

In a seventh additional aspect, alone or in combination with one or more of the first through sixth aspects, process700includes receiving an indication to associate, with the power saving mode of the base station, one or more of a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals.

In an eighth additional aspect, alone or in combination with one or more of the first through seventh aspects, the power saving mode of the base station is based at least in part on one or more of a number of UEs connected with the base station, an amount of traffic handled by the base station, a type of traffic handled by the base station, channeling conditions for channels between the base station and the UE, or communication channels for UEs connected with the base station.

In a ninth additional aspect, alone or in combination with one or more of the first through eighth aspects, the configuration is associated with cancelation of a set of the one or more periodic reference signals, the cancelation being based at least in part on one or more ports associated with the one or more periodic reference signals.

In a tenth additional aspect, alone or in combination with one or more of the first through ninth aspects, the configuration is associated with a set of one or more candidate values of a timing offset between a symbol allocated for receiving the one or more periodic reference signals and a first uplink transmission symbol scheduled for transmitting a CSI-RS report associated with the one or more periodic reference signals.

In an eleventh additional aspect, alone or in combination with one or more of the first through tenth aspects, process700includes transmitting a report associated with receiving the one or more periodic reference signals, wherein report elements included in the report are based at least in part on the power saving mode of the base station.

In a twelfth additional aspect, alone or in combination with one or more of the first through eleventh aspects, process700includes receiving an indication of a report configuration that indicates candidate sets of report elements, the candidate sets of report elements selectable for inclusion in the report based at least in part on the power saving mode of the base station.

FIG.8is a flowchart illustrating an example process800performed, for example, by a base station in accordance with the present disclosure. Example process800is an example where the base station (for example, base station110) performs operations associated with periodic reference signals in a power saving mode.

As shown inFIG.8, in some aspects, process800may include transmitting an indication of a power saving mode of the base station for communicating with a UE (block810). For example, the base station (such as by using communication manager150or transmission component904, depicted inFIG.9) may transmit an indication of a power saving mode of the base station for communicating with a UE, as described above.

As further shown inFIG.8, in some aspects, process800may include communicating with the UE, the communicating comprising: transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station (block820). For example, the base station (such as by using communication manager150, reception component1002, or transmission component1004, depicted inFIG.10) may communicate with the UE, the communicating comprising: transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station, as described above.

In a first additional aspect, the one or more periodic reference signals comprise one or more of CSI-RSs or SRSs.

In a second additional aspect, alone or in combination with the first aspect, the configuration is associated with one or more of a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between resources for repetitions of the one or more periodic reference signals.

In a third additional aspect, alone or in combination with one or more of the first and second aspects, process800includes transmitting an indication of an additional power saving mode of the base station (for example, where the power saving mode is a first power saving mode and the additional power saving mode is a second power saving mode) having an additional configuration (for example, where the configuration is a first configuration and the additional configuration is a second configuration) associated with one or more of cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the power saving mode, or a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the power saving mode.

In a fourth additional aspect, alone or in combination with one or more of the first through third aspects, transmitting the one or more periodic reference signals or receiving the one or more periodic reference signals is based at least in part on one or more of transmitting an indication to change to the power saving mode of the base station from a previously active power saving mode of the base station, transmitting an indication to activate the one or more periodic reference signals, or transmitting an indication to change the sampling factor of the one or more periodic reference signals to a sampling factor that is different from a sampling factor associated with the power saving mode.

In a fifth additional aspect, alone or in combination with one or more of the first through fourth aspects, transmitting the indication of the power saving mode of the base station comprises transmitting one or both of an explicit indication, or an indication of a change of the power saving mode of the base station relative to another power saving mode of the base station.

In a sixth additional aspect, alone or in combination with one or more of the first through fifth aspects, the configuration is associated with a comb level of the one or more periodic reference signals that is based at least in part on the power saving mode of the base station, or the configuration is associated with a comb offset of the one or more periodic reference signals that is based at least in part on the power saving mode of the base station.

In a seventh additional aspect, alone or in combination with one or more of the first through sixth aspects, process800includes transmitting an indication to associate, with the power saving mode of the base station, one or more of a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals.

In an eighth additional aspect, alone or in combination with one or more of the first through seventh aspects, the power saving mode of the base station is based at least in part on one or more of a number of UEs connected with the base station, an amount of traffic handled by the base station, a type of traffic handled by the base station, channeling conditions for channels between the base station and the UE, or communication channels for UEs connected with the base station.

In a ninth additional aspect, alone or in combination with one or more of the first through eighth aspects, the configuration is associated with cancelation of a set of the one or more periodic reference signals, the cancelation being based at least in part on one or more ports associated with the one or more periodic reference signals.

In a tenth additional aspect, alone or in combination with one or more of the first through ninth aspects, the configuration is associated with a set of one or more candidate values of a timing offset between a symbol allocated for receiving the one or more periodic reference signals and a first uplink transmission symbol scheduled for transmitting a CSI-RS report associated with the one or more periodic reference signals.

In an eleventh additional aspect, alone or in combination with one or more of the first through tenth aspects, process800includes receiving a report associated with receiving the one or more periodic reference signals, wherein contents of the report are based at least in part on the power saving mode of the base station.

In a twelfth additional aspect, alone or in combination with one or more of the first through eleventh aspects, process800includes transmitting an indication of a report configuration that indicates candidate sets of report elements, the candidate sets of report elements selectable for inclusion in the report based at least in part on the power saving mode of the base station.

FIG.9is a diagram of an example apparatus900for wireless communication. The apparatus900may be a UE, or a UE may include the apparatus900. In some aspects, the apparatus900includes a reception component902and a transmission component904, which may be in communication with one another (for example, via one or more buses or one or more other components). As shown, the apparatus900may communicate with another apparatus906(such as a UE, a base station, or another wireless communication device) using the reception component902and the transmission component904. As further shown, the apparatus900may include a communication manager908(for example, the communication manager140). The communication manager908may provide information to, or receive information from, the reception component902and the transmission component904in connection with one or more of reception or transmission operations described herein.

The reception component902may receive an indication of a power saving mode of a base station. The reception component902or transmission component904may communicate with the base station, the communicating comprising transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

The reception component902may receive an indication of an additional power saving mode of the base station having an additional configuration associated with one or more of cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the power saving mode, or a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the power saving mode.

The reception component902may receive an indication to associate, with the power saving mode of the base station, one or more of a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals.

The transmission component904may transmit a report associated with receiving the one or more periodic reference signals, wherein report elements included in the report are based at least in part on the power saving mode of the base station.

The reception component902may receive an indication of a report configuration that indicates candidate sets of report elements, the candidate sets of report elements selectable for inclusion in the report based at least in part on the power saving mode of the base station.

FIG.10is a diagram of an example apparatus1000for wireless communication. The apparatus1000may be a base station, or a base station may include the apparatus1000. In some aspects, the apparatus1000includes a reception component1002and a transmission component1004, which may be in communication with one another (for example, via one or more buses or one or more other components). As shown, the apparatus1000may communicate with another apparatus1006(such as a UE, a base station, or another wireless communication device) using the reception component1002and the transmission component1004. As further shown, the apparatus1000may include a communication manager1008(for example, the communication manager140). The communication manager1008may provide information to, or receive information from, the reception component1002and the transmission component1004in connection with one or more of reception or transmission operations described herein.

The transmission component1004may transmit an indication of a power saving mode of the base station for communicating with a UE. The reception component1002or transmission component1004may communicate with the UE, the communicating comprising transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

The transmission component1004may transmit an indication of an additional power saving mode of the base station having an additional configuration associated with one or more of cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the power saving mode, or a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the power saving mode.

The transmission component1004may transmit an indication to associate, with the power saving mode of the base station, one or more of a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals.

The reception component1002may receive a report associated with receiving the one or more periodic reference signals, wherein contents of the report are based at least in part on the power saving mode of the base station.

The transmission component1004may transmit an indication of a report configuration that indicates candidate sets of report elements, the candidate sets of report elements selectable for inclusion in the report based at least in part on the power saving mode of the base station.

Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving an indication of a power saving mode of a base station; and communicating with the base station, the communicating comprising: transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

Aspect 2: The method of Aspect 1, wherein the one or more periodic reference signals comprise one or more of channel state information reference signals (CSI-RSs) or sounding reference signals (SRSs).

Aspect 3: The method of any of Aspects 1 or 2, wherein the configuration is associated with one or more of: a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals.

Aspect 4: The method of any of Aspects 1-3, further comprising: receiving an indication of a second power saving mode of the base station having a second configuration associated with one or more of: cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the power saving mode, or a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the power saving mode.

Aspect 5: The method of Aspect 4, wherein transmitting the one or more periodic reference signals or receiving the one or more periodic reference signals is based at least in part on one or more of: receiving an indication to change to the power saving mode of the base station from a previously active power saving mode of the base station, receiving an indication to activate the one or more periodic reference signals, or receiving an indication to change the sampling factor of the one or more periodic reference signals to a sampling factor that is different from a sampling factor associated with the power saving mode.

Aspect 6: The method of any of Aspects 1-5, wherein receiving the indication of the power saving mode of the base station comprises receiving one or both of: an explicit indication, or an indication of a change of the power saving mode of the base station relative to another power saving mode of the base station.

Aspect 7: The method of any of Aspects 1-6, wherein: the configuration is associated with a comb level of the one or more periodic reference signals that is based at least in part on the power saving mode of the base station, or the configuration is associated with a comb offset of the one or more periodic reference signals that is based at least in part on the power saving mode of the base station.

Aspect 8: The method of any of Aspects 1-7, further comprising: receiving an indication to associate, with the power saving mode of the base station, one or more of: a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals.

Aspect 9: The method of any of Aspects 1-8, wherein the power saving mode of the base station is based at least in part on one or more of: a number of UEs connected with the base station, an amount of traffic handled by the base station, a type of traffic handled by the base station, channel conditions for channels between the base station and the UE, or communication channels for UEs connected with the base station.

Aspect 10: The method of any of Aspects 1-9, wherein the configuration is associated with cancelation of a set of the one or more periodic reference signals, the cancelation being based at least in part on one or more ports associated with the one or more periodic reference signals.

Aspect 11: The method of any of Aspects 1-10, wherein the configuration is associated with a set of one or more candidate values of a timing offset between a symbol allocated for receiving the one or more periodic reference signals and a first uplink transmission symbol scheduled for transmitting a channel state information reference signal (CSI-RS) report associated with the one or more periodic reference signals.

Aspect 12: The method of any of Aspects 1-11, further comprising: transmitting a report associated with receiving the one or more periodic reference signals, wherein report elements included in the report are based at least in part on the power saving mode of the base station.

Aspect 13: The method of Aspect 12, further comprising: receiving an indication of a report configuration that indicates candidate sets of report elements, the candidate sets of report elements selectable for inclusion in the report based at least in part on the power saving mode of the base station.

Aspect 14: A method of wireless communication performed by a base station, comprising: transmitting an indication of a power saving mode of the base station for communicating with a user equipment (UE); and communicating with the UE, the communicating comprising: transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station.

Aspect 15: The method of Aspect 14, wherein the one or more periodic reference signals comprise one or more of channel state information reference signals (CSI-RSs) or sounding reference signals (SRSs).

Aspect 16: The method of any of Aspects 14 or 15, wherein the configuration is associated with one or more of: a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between resources for repetitions of the one or more periodic reference signals.

Aspect 17: The method of any of Aspects 14-16, further comprising: transmitting an indication of a second power saving mode of the base station having a second configuration associated with one or more of: cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the power saving mode, or a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the power saving mode.

Aspect 18: The method of Aspect 17, wherein transmitting the one or more periodic reference signals or receiving the one or more periodic reference signals is based at least in part on one or more of: transmitting an indication to change to the power saving mode of the base station from a previously active power saving mode of the base station, transmitting an indication to activate the one or more periodic reference signals, or transmitting an indication to change the sampling factor of the one or more periodic reference signals to a sampling factor that is different from a sampling factor associated with the power saving mode.

Aspect 19: The method of any of Aspects 14-18, wherein transmitting the indication of the power saving mode of the base station comprises transmitting one or both of: an explicit indication, or an indication of a change of the power saving mode of the base station relative to another power saving mode of the base station.

Aspect 20: The method of any of Aspects 14-19, wherein: the configuration is associated with a comb level of the one or more periodic reference signals that is based at least in part on the power saving mode of the base station, or the configuration is associated with a comb offset of the one or more periodic reference signals that is based at least in part on the power saving mode of the base station.

Aspect 21: The method of any of Aspects 14-20, further comprising: transmitting an indication to associate, with the power saving mode of the base station, one or more of: a periodicity of the one or more periodic reference signals, a repetition number of the one or more periodic reference signals, a repetition pattern of the one or more periodic reference signals, or a time gap between repetitions of the one or more periodic reference signals.

Aspect 22: The method of any of Aspects 14-21, wherein the power saving mode of the base station is based at least in part on one or more of: a number of UEs connected with the base station, an amount of traffic handled by the base station, a type of traffic handled by the base station, channel conditions for channels between the base station and the UE, or communication channels for UEs connected with the base station.

Aspect 23: The method of any of Aspects 14-22, wherein the configuration is associated with cancelation of a set of the one or more periodic reference signals, the cancelation being based at least in part on one or more ports associated with the one or more periodic reference signals.

Aspect 24: The method of any of Aspects 14-23, wherein the configuration is associated with a set of one or more candidate values of a timing offset between a symbol allocated for receiving the one or more periodic reference signals and a first uplink transmission symbol scheduled for transmitting a channel state information reference signal (CSI-RS) report associated with the one or more periodic reference signals.

Aspect 25: The method of any of Aspects 14-24, further comprising: receiving a report associated with receiving the one or more periodic reference signals, wherein contents of the report are based at least in part on the power saving mode of the base station.

Aspect 26: The method of Aspect 25, further comprising: transmitting an indication of a report configuration that indicates candidate sets of report elements, the candidate sets of report elements selectable for inclusion in the report based at least in part on the power saving mode of the base station.

As used herein, the term “component” is intended to be broadly construed as hardware or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware or a combination of hardware and software. It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems or methods is not limiting of the aspects. Thus, the operation and behavior of the systems or methods are described herein without reference to specific software code, since those skilled in the art will understand that software and hardware can be designed to implement the systems or methods based, at least in part, on the description herein.