Patent Publication Number: US-2022216962-A1

Title: Access point assisted sidelink communications

Description:
FIELD OF TECHNOLOGY 
     The following relates to wireless communications, including access point assisted sidelink communications. 
     BACKGROUND 
     Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE). 
     A first UE may be configured to communicate with a second UE using sidelink communications. However, for some use cases, sidelink communications may be limited. Reducing the limitations or improving the opportunities for sidelink communications may be beneficial. 
     SUMMARY 
     The described techniques relate to improved methods, systems, devices, and apparatuses that support access point assisted sidelink communications. Generally, the described techniques provide for enabling an access point (AP) to configure power parameters for sidelink communications between user equipments (UEs), including sidelink communications for UEs operating in a low power indoor (LPI) mode. The power parameters may be configured based on the UEs operating within an AP service area. In some examples, a first UE and a second UE may operate within a service area of a first AP. Additionally or alternatively, the second UE may operate within a service area of a second AP different from the first AP. In some examples, the first AP may transmit one or more signals (e.g., an anchor signal a synchronization signal block (SSB), a reference signal, or another signal, or any combination thereof) to the first UE, and the first UE may determine the power parameters based on receiving the signals (e.g., based on a reference signal receive power (RSRP) of the received signals). Additionally or alternatively, the first UE may be configured to transmit one or more reference signals (e.g., a sounding reference signal (SRS)) to the first AP, and the first AP may configure the power parameters based on receiving the reference signals. The first AP may indicate the power parameters in a sidelink configuration transmitted to the first UE. The sidelink configuration may indicate limits (e.g., a maximum) for one or more power parameters (such as a power spectral density (PSD), an equivalent isotropic radiated power (EIRP), etc.) of the sidelink communications. The first UE may communicate with the second UE on a sidelink channel in accordance with the sidelink configuration, which may improve efficiency and reliability of the sidelink communications, among other benefits. 
     A method for wireless communications at a first user equipment (UE) is described. The method may include receiving, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point, determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel, and communicating with the second UE on the second channel in accordance with the sidelink configuration. 
     An apparatus for wireless communications at a first UE is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point, determine one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel, and communicate with the second UE on the second channel in accordance with the sidelink configuration. 
     Another apparatus for wireless communications at a first UE is described. The apparatus may include means for receiving, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point, means for determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel, and means for communicating with the second UE on the second channel in accordance with the sidelink configuration. 
     A non-transitory computer-readable medium storing code for wireless communications at a first UE is described. The code may include instructions executable by a processor to receive, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point, determine one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel, and communicate with the second UE on the second channel in accordance with the sidelink configuration. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving one or more signals from the first access point, where the sidelink configuration may be received based on receiving the one or more signals, and where the signaling on the first channel includes the one or more signals. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more signals include an anchor signal, a synchronization signal block, a reference signal, or any combination thereof. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting one or more reference signals to the first access point, where the sidelink configuration may be received based on transmitting the one or more reference signals, and where the signaling on the first channel includes the one or more reference signals. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a first operation mode for communications with the first access point and a second operation mode for the sidelink communications, where communicating with the second UE on the second channel may be in accordance with the second operation mode. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, each of the first operation mode and the second operation mode includes a standard power mode or a low power indoor mode. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more power parameters include a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first channel and the second channel include a same channel. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first channel may be different from the second channel. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first channel and the second channel may be in a same radio frequency spectrum band. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first channel may be in a first radio frequency spectrum band and the second channel may be in a second radio frequency spectrum band. 
     A method for wireless communications at a first access point is described. The method may include determining one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel and transmitting, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. 
     An apparatus for wireless communications at a first access point is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to determine one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel and transmit, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. 
     Another apparatus for wireless communications at a first access point is described. The apparatus may include means for determining one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel and means for transmitting, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. 
     A non-transitory computer-readable medium storing code for wireless communications at a first access point is described. The code may include instructions executable by a processor to determine one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel and transmit, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting one or more signals to the first UE, where the one or more power parameters may be determined based on transmitting the one or more signals, and where the signaling on the first channel includes the one or more signals. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more signals include an anchor signal, a synchronization signal block, a reference signal, or any combination thereof. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving one or more reference signals from the first UE, where the one or more power parameters may be determined based on receiving the one or more reference signals, and where the signaling on the first channel includes the one or more reference signals. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a first operation mode for communications with the first UE and a second operation mode for the sidelink communications, where communicating with the first UE on the first channel may be in accordance with the first operation mode. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, each of the first operation mode and the second operation mode includes a standard power mode or a low power indoor mode. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more power parameters include a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first channel and the second channel include a same channel. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first channel may be different from the second channel. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first channel and the second channel may be in a same radio frequency spectrum band. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first channel may be in a first radio frequency spectrum band and the second channel may be in a second radio frequency spectrum band. 
     A method for wireless communications at a first UE is described. The method may include determining that the first UE is located indoors, determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors, and communicating with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. 
     An apparatus for wireless communications at a first UE is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to determine that the first UE is located indoors, determine one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors, and communicate with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. 
     Another apparatus for wireless communications at a first UE is described. The apparatus may include means for determining that the first UE is located indoors, means for determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors, and means for communicating with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. 
     A non-transitory computer-readable medium storing code for wireless communications at a first UE is described. The code may include instructions executable by a processor to determine that the first UE is located indoors, determine one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors, and communicate with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving location information associated with the first UE, where determining that the first UE may be located indoors may be based on receiving the location information. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the location information may be received from one or more sensors, one or more actuators, or any combination thereof. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the location information includes ultra wideband positioning information, a configuration, a setting, or any combination thereof. 
     Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining an operation mode for the sidelink communications, where communicating with the second UE may be in accordance with the operation mode. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the operation mode includes a standard power mode or a low power indoor mode. 
     In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more power parameters include a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates an example of a wireless communications system that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIG. 2  illustrates an example of a wireless communications system that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIG. 3  illustrates an example of a wireless communications system that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIG. 4  illustrates an example of a process flow that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIG. 5  illustrates an example of a process flow that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIGS. 6 and 7  show block diagrams of devices that support access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIG. 8  shows a block diagram of a communications manager that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIG. 9  shows a diagram of a system including a device that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIGS. 10 and 11  show block diagrams of devices that support access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIG. 12  shows a block diagram of a communications manager that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIG. 13  shows a diagram of a system including a device that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. 
         FIGS. 14 through 19  show flowcharts illustrating methods that support access point assisted sidelink communications in accordance with aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Some wireless communication systems may include one or more wireless devices that support one or more multiple radio access technologies (RATs) including fourth generation (4G) systems such as Long Term Evolution (LTE) systems, fifth generation (5G) systems which may be referred to as New Radio (NR) systems, and Wi-Fi systems (e.g., wireless local area network (WLAN) systems). For example, a wireless communications system may include user equipment (UE), base stations, such as next-generation NodeBs or giga-NodeBs (either of which may be referred to as a gNB), integrated access and backhaul (IAB) nodes, repeaters (e.g., smart repeaters, dumb repeaters, radio frequency (RF) repeaters, among other examples), sidelink nodes, relay nodes, etc. 
     In some wireless communications systems, UEs may be configured to communicate with one another via sidelink communications. In some cases, however, if power parameters (such as power spectral density (PSD), equivalent isotropic radiated power (EIRP), etc.) of the sidelink communications are not limited, transmissions on a sidelink channel may interfere with communications between UEs and a base station, which may be referred to as Uu communications. Accordingly, sidelink communications may be limited in one or more radio frequency spectrum bands (e.g., bands in radio frequencies near 6 gigahertz (GHz)) to reduce interference. For example, in a low power indoor (LPI) mode, UEs may be allowed to participate in sidelink communications while indoors to help ensure that the UE transmission powers are low enough to avoid causing interference. In some cases, there may be concerns about allowing sidelink communications in an LPI mode. For example, sidelink communications may enable a UE to operate outside a service area of an authorized access point (AP), such as via a “daisy chain” of sidelink connections. These concerns may be addressed by ensuring that UEs are in direct communication with an AP. It may thus be beneficial to enable an AP to assist in configuring sidelink communications between UEs. 
     According to the techniques described herein, an AP may configure power parameters for sidelink communications between UEs, including sidelink communications for UEs operating in an LPI mode. The power parameters may be configured based on the UEs operating within an AP service area. In some examples, a first UE and a second UE may operate within a service area of a first AP. Additionally or alternatively, the second UE may operate within a service area of a second AP different from the first AP. In some examples, the first AP may transmit one or more signals (e.g., an anchor signal, a synchronization signal block (SSB), a reference signal, or another signal, or any combination thereof) to the first UE, and the first UE may determine the power parameters based on receiving the signals (e.g., based on a reference signal receive power (RSRP) of the received signals). Additionally or alternatively, the first UE may be configured to transmit one or more reference signals (e.g., a sounding reference signal (SRS)) to the first AP, and the first AP may configure the power parameters based on receiving the reference signals. 
     The first AP may indicate the power parameters in a sidelink configuration transmitted to the first UE. The sidelink configuration may indicate limits (e.g., a maximum) for one or more power parameters (such as a PSD, an EIRP, etc.) of the sidelink communications. Additionally or alternatively, the first UE may determine the power parameters based on the UEs being located indoors. The first UE may receive location information (e.g., ultra wideband positioning information, a configuration, a setting, or other location information) indicating the UEs are located indoors. In some examples, the first UE may receive the location information from one or more sensors, one or more actuators, or other mechanisms, or any combination thereof, such as mechanisms associated with indoor factory automation. The first UE may communicate with the second UE on a sidelink channel in accordance with the power parameters, which may improve efficiency and reliability of the sidelink communications, among other benefits. 
     Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to process flows, apparatus diagrams, system diagrams, and flowcharts that relate to access point assisted sidelink communications. 
       FIG. 1  illustrates an example of a wireless communications system  100  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The wireless communications system  100  may include one or more base stations  105 , one or more UEs  115 , and a core network  130 . In some examples, the wireless communications system  100  may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communications system  100  may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof. 
     The base stations  105  may be dispersed throughout a geographic area to form the wireless communications system  100  and may be devices in different forms or having different capabilities. The base stations  105  and the UEs  115  may wirelessly communicate via one or more communication links  125 . Each base station  105  may provide a coverage area  110  over which the UEs  115  and the base station  105  may establish one or more communication links  125 . The coverage area  110  may be an example of a geographic area over which a base station  105  and a UE  115  may support the communication of signals according to one or more radio access technologies. 
     The UEs  115  may be dispersed throughout a coverage area  110  of the wireless communications system  100 , and each UE  115  may be stationary, or mobile, or both at different times. The UEs  115  may be devices in different forms or having different capabilities. Some example UEs  115  are illustrated in  FIG. 1 . The UEs  115  described herein may be able to communicate with various types of devices, such as other UEs  115 , the base stations  105 , or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in  FIG. 1 . 
     The base stations  105  may communicate with the core network  130 , or with one another, or both. For example, the base stations  105  may interface with the core network  130  through one or more backhaul links  120  (e.g., via an S1, N2, N3, or other interface). The base stations  105  may communicate with one another over the backhaul links  120  (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations  105 ), or indirectly (e.g., via core network  130 ), or both. In some examples, the backhaul links  120  may be or include one or more wireless links. 
     One or more of the base stations  105  described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an AP, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology. Additionally, and in some cases, wireless communications system  100  may include APs  106  that are used for local area network communications within a service area  112 . 
     A UE  115  may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE  115  may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UE  115  may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples. 
     The UEs  115  described herein may be able to communicate with various types of devices, such as other UEs  115  that may sometimes act as relays as well as the base stations  105 , the APs  106 , and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in  FIG. 1 . 
     The UEs  115  and the base stations  105  may wirelessly communicate with one another via one or more communication links  125  over one or more carriers. Additionally or alternatively, the UEs  115  and the APs  106  may wirelessly communicate with one another via one or more communication links  125  over a local area network. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links  125 . For example, a carrier used for a communication link  125  may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system  100  may support communication with a UE  115  using carrier aggregation or multi-carrier operation. A UE  115  may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. 
     Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements that a UE  115  receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE  115 . A wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE  115 . 
     The time intervals for the base stations  105 , the APs  106 , or the UEs  115  may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of T s =1/(Δf max ·N f ) seconds, where Δf max  may represent the maximum supported subcarrier spacing, and N f  may represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023). 
     Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing. Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems  100 , a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation. 
     A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system  100  and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communications system  100  may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)). 
     Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs  115 . For example, one or more of the UEs  115  may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs  115  and UE-specific search space sets for sending control information to a specific UE  115 . 
     Each base station  105  may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a base station  105  (e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area  110  or a portion of a geographic coverage area  110  (e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station  105 . For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas  110 , among other examples. 
     A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs  115  with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered base station  105 , as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs  115  with service subscriptions with the network provider or may provide restricted access to the UEs  115  having an association with the small cell (e.g., the UEs  115  in a closed subscriber group (CSG), the UEs  115  associated with users in a home or office). A base station  105  may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers. Similarly, an AP  106  may support communications over a local network in a service area  112 , which may be or include a building, a subset of a building, or an area associated with factory automation, among other examples. 
     In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access for different types of devices. 
     In some examples, a base station  105  may be movable and therefore provide communication coverage for a moving geographic coverage area  110 . In some examples, different geographic coverage areas  110  associated with different technologies may overlap, but the different geographic coverage areas  110  may be supported by the same base station  105 . In other examples, the overlapping geographic coverage areas  110  associated with different technologies may be supported by different base stations  105 . The wireless communications system  100  may include, for example, a heterogeneous network in which different types of the base stations  105  provide coverage for various geographic coverage areas  110  using the same or different radio access technologies. 
     Some UEs  115 , such as MTC or IoT devices, may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication). M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station  105  without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program. Some UEs  115  may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging. 
     Some UEs  115  may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously). In some examples, half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for the UEs  115  include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs  115  may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs)) within a carrier, within a guard-band of a carrier, or outside of a carrier. 
     The wireless communications system  100  may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system  100  may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications. The UEs  115  may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions). Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT), mission critical video (MCVideo), or mission critical data (MCData). Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein. 
     In some examples, a UE  115  may also be able to communicate directly with other UEs  115  over a sidelink communication link  135  (e.g., using a client-to-client, peer-to-peer (P2P) or device-to-device (D2D) protocol). One or more UEs  115  utilizing sidelink communications may be within the geographic coverage area  110  of a base station  105  or the service area  112  of an AP  106 . Other UEs  115  in such a group may be outside the geographic coverage area  110  of a base station  105  or be otherwise unable to receive transmissions from a base station  105 . In some examples, groups of the UEs  115  communicating via sidelink communications may utilize a one-to-many (1:M) system in which each UE  115  transmits to every other UE  115  in the group. In some examples, a base station  105  or an AP  106  facilitates the scheduling of resources for sidelink communications. In other cases, sidelink communications are carried out between the UEs  115  without the involvement of a base station  105  or an AP  106 . 
     The core network  130  may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network  130  may be an evolved packet core (EPC) or 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs  115  served by the base stations  105  associated with the core network  130 . User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services  150  for one or more network operators. The IP services  150  may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service. 
     Some of the network devices, such as a base station  105 , may include subcomponents such as an access network entity  140 , which may be an example of an access node controller (ANC). Each access network entity  140  may communicate with the UEs  115  through one or more other access network transmission entities  145 , which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs). Each access network transmission entity  145  may include one or more antenna panels. In some configurations, various functions of each access network entity  140  or base station  105  may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station  105 ). 
     The wireless communications system  100  may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. The UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs  115  located indoors. The transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz. 
     The wireless communications system  100  may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system  100  may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as the base stations  105  and the UEs  115  may employ carrier sensing for collision detection and avoidance. In some examples, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples. 
     A base station  105 , an AP  106 , or a UE  115  may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station  105 , an AP  106 , or a UE  115  may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a base station  105  may be located in diverse geographic locations. A base station  105  or an AP  106  may have an antenna array with a number of rows and columns of antenna ports that the base station  105  or the AP  106  may use to support beamforming of communications with a UE  115 . Likewise, a UE  115  may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port. 
     The base stations  105 , the APs  106 , or the UEs  115  may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices. 
     Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station  105 , an AP  106 , a UE  115 ) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation). 
     The wireless communications system  100  may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. A Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE  115  and a base station  105  or a core network  130  supporting radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels. 
     The UEs  115 , the APs  106 , and the base stations  105  may support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link  125 . HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval. 
     According to the techniques described herein, an AP  106  may configure power parameters for sidelink communications between UEs  115  (e.g., via sidelink communications links  135 ), including sidelink communications for UEs  115  operating in an LPI mode. The power parameters may be configured based on the UEs operating within an AP service area  112 . In some examples, a first UE  115  and a second UE  115  may operate within a service area  112  of a first AP  106 . Additionally or alternatively, the second UE  115  may operate within a service area  112  of a second AP  106  different from the first AP  106 . In some examples, the first AP  106  may transmit one or more signals to the first UE  115 , and the first UE  115  may determine the power parameters based on receiving the signals (e.g., based on an RSRP of the received signals). Additionally or alternatively, the first UE  115  may be configured to transmit one or more reference signals to the first AP  106 , and the first AP  106  may configure the power parameters based on receiving the reference signals. The first AP  106  may indicate the power parameters in a sidelink configuration transmitted to the first UE  115 . The sidelink configuration may indicate limits (e.g., a maximum) for one or more power parameters (such as a PSD, an EIRP, etc.) of the sidelink communications. Additionally or alternatively, the first UE  115  may determine the power parameters based on the UEs  115  being located indoors. For example, the first UE  115  may receive location information indicating the UEs  115  are located indoors. The first UE  115  may communicate with the second UE  115  on a sidelink communications link  135  in accordance with the power parameters, which may improve efficiency and reliability of the sidelink communications, among other benefits. 
       FIG. 2  illustrates an example of a wireless communications system  200  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. In some examples, the wireless communications system  200  may implement aspects of the wireless communications system  100 . For example, the wireless communications system  200  may include an AP  206  and one or more UEs  215 , which may be examples of corresponding devices described with reference to  FIG. 1 . The wireless communications system  200  may include features for improved sidelink communications between the UEs  215 , among other benefits. 
     The AP  206  may communicate with the UEs  215  via channels  220 , each of which may be referred to as a Uu interface. For example, the AP  206  may communicate with a UE  215 - a  via a channel  220 - a  and with a UE  215 - b  via a channel  220 - b . In some examples, the channels  220  may be located in a radio frequency spectrum band such as an Unlicensed National Information Infrastructure (U-NII) radio frequency spectrum band with a carrier frequency near 6 GHz (e.g., a U-NII-4 band, a U-NII-5 band, a U-NII-6 band, a U-NII-7 band, a U-NII-8 band, or another radio frequency spectrum band). The AP  206  may communicate with the UEs  215  via the channels  220  according to a configured operation mode (which may also be referred to as a regulation mode), such as a standard power mode, an LPI mode, a very low power (VLP) mode, etc. 
     The UE  215 - a  and the UE  215 - b  may operate within a service area  210  of the AP  206 . The UEs  215  may be configured to communicate via a sidelink channel  225  according to an operation mode. The operation mode for sidelink communications via the sidelink channel  225  may be a same operation mode as the configured operation mode for the communications via the channels  220 , or a different operation mode. In some cases, however, if power parameters (such as a PSD, an EIRP, etc.) of the sidelink communications are not limited, transmissions on the sidelink channel  225  may interfere with communications between the AP  206  and the UEs  215  on the channels  220 . In some cases, there may also be concerns about allowing sidelink communications between the UEs  215  in an LPI mode. For example, sidelink communications may enable a UE  215  to operate outside the service area  210  of the AP  206 , such as via a “daisy chain” of sidelink connections. These concerns may be addressed by ensuring that UEs  215  are in direct communication with the AP  206  (e.g., via a channel  220 ). It may thus be beneficial to enable the AP  206  to assist in configuring sidelink communications between the UEs  215 . 
     According to the techniques described herein, the AP  206  may configure power parameters for sidelink communications between the UEs  215  on the sidelink channel  225 . The power parameters may be configured based on the UEs  215  operating within the service area  210  of the AP  206 . In some examples, the power parameters may be configured based on the channel  220 - a , the channel  220 - b , and the sidelink channel  225  being a same channel, which may be referred to as a channel 0. In some examples, the power parameters may be configured based on a first operation mode for the communications via the channels  220 , a second operation mode for the sidelink communications via the sidelink channel  225 , or both. 
     In some examples, the AP  206  may transmit one or more signals (e.g., an anchor signal, an SSB, a reference signal, or another signal, or any combination thereof) to the UE  215 - a , and the UE  215 - a  may determine the power parameters based on receiving the signals (e.g., based on an RSRP of the received signals). Additionally or alternatively, the UE  215 - a  may be configured to transmit one or more reference signals (e.g., an SRS) to the AP  206 , and the AP  206  may configure the power parameters based on receiving the reference signals. 
     The AP  206  may indicate the power parameters in a sidelink configuration transmitted to the UE  215 - a . The sidelink configuration may indicate limits (e.g., a maximum) for one or more power parameters (such as a PSD, an EIRP, etc.) of the sidelink communications. Additionally or alternatively, the UE  215 - a  may determine the power parameters based on the UEs  215  being located indoors. The UE  215 - a  may receive location information indicating the UEs  215  are located indoors. In some examples, the UE  215 - a  may receive the location information from one or more mechanisms associated with indoor factory automation. The UE  215 - a  may communicate with the UE  215 - b  via the sidelink channel  225  in accordance with the power parameters, which may improve efficiency and reliability of sidelink communications, among other benefits. 
       FIG. 3  illustrates an example of a wireless communications system  300  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. In some examples, the wireless communications system  300  may implement aspects of the wireless communications system  100 . For example, the wireless communications system  300  may include one or more APs  306  and one or more UEs  315 , which may be examples of corresponding devices described with reference to  FIG. 1 . The wireless communications system  300  may include features for improved sidelink communications between the UEs  315 , among other benefits. 
     The APs  306  may communicate with the UEs  315  via channels  320 , each of which may be referred to as a Uu interface. For example, an AP  306 - a  may communicate with a UE  315 - a  via a channel  320 - a , and an AP  306 - b  may communicate with a UE  315 - b  via a channel  320 - b . In some examples, the channels  320  may be in a radio frequency spectrum band such as a U-NII radio frequency spectrum band with a carrier frequency near 6 GHz. Each AP  306  may communicate with UEs  315  via the channels  320  according to a respective configured operation mode, such as a standard power mode, an LPI mode, a VLP mode, etc. A first operation mode associated with the AP  306 - a  and a second operation mode associated with the AP  306 - b  may be a same operation mode or different operation modes. 
     The UE  315 - a  and the UE  315 - b  may each operate within a service area  310  of an AP  306 . As illustrated in  FIG. 3 , the UE  315 - a  may operate within a service area  310 - a  of the AP  306 - a , and the UE  315 - b  may operate within a service area  310 - b  of the AP  306 - b . The UEs  315  may be configured to communicate via a sidelink channel  325  according to a third operation mode. The third operation mode for sidelink communications via the sidelink channel  325  may be a same operation mode as the first or second operation modes for the communications via the channels  320 , or a different operation mode. In some cases, however, if power parameters (such as a PSD, an EIRP, etc.) of sidelink communications are not limited, transmissions on the sidelink channel  325  may interfere with communications between the APs  306  and the UEs  315  on the channels  320 . In some cases, there may also be concerns about allowing sidelink communications between the UEs  315  in an LPI mode. For example, sidelink communications may enable a UE  315  to operate outside a service area  310  of an AP  306 , such as via a “daisy chain” of sidelink connections. These concerns may be addressed by ensuring that UEs  315  are in direct communication with an AP  306  (e.g., via a channel  320 ). It may thus be beneficial to enable the APs  306  to assist in configuring sidelink communications between the UEs  315 . 
     According to the techniques described herein, the APs  306  may configure power parameters for sidelink communications between the UEs  315  on the sidelink channel  325 . The power parameters may be configured based on the UEs  315  operating within a service area  310  of an AP  306 . In some examples, the power parameters may be configured based on the first operation mode for the communications via the channel  320 - a , the second operation mode for the communications via the channel  320 - b , the third operation mode for the sidelink communications via the sidelink channel  325 , or any combination thereof. 
     In some examples, the power parameters may be configured based on the channel  220 - a , the channel  220 - b , the sidelink channel  225 , and the radio frequency spectrum band (or bands) that includes the channel  220 - a , the channel  220 - b , and the sidelink channel  225 . In some examples, the channel  320 - a , the channel  320 - b , and the sidelink channel  325  may be a same channel, which may be referred to as a channel 0. In some examples, the channel  320 - a , the channel  320 - b , and the sidelink channel  325  being different channels. For example, the channel  320 - a  may be the channel 0, the channel  320 - b  may be a channel 1, and the sidelink channel  325  may be a channel 2. In some examples, the channel  320 - a , the channel  320 - b , and the sidelink channel  325  may be in a same radio frequency spectrum band (e.g., a U-NII band). In some examples, the channel  320 - a , the channel  320 - b , and the sidelink channel  325  may be in different radio frequency spectrum bands. 
     In some examples, the AP  306 - a  may transmit one or more signals (e.g., an anchor signal, an SSB, a reference signal, or another signal, or any combination thereof) to the UE  315 - a , and the UE  315 - a  may determine the power parameters based on receiving the signals (e.g., based on an RSRP of the received signals). Additionally or alternatively, the UE  315 - b  may determine the power parameters based on receiving signals from the AP  306 - b . In some examples, the UE  315 - a  may be configured to transmit one or more reference signals (e.g., an SRS) to the AP  306 - a , and the AP  306 - a  may configure the power parameters based on receiving the reference signals. Additionally or alternatively, the AP  306 - b  may configure the power parameters based on receiving reference signals from the UE  315 - b.    
     The AP  306 - a  may indicate the power parameters in a sidelink configuration transmitted to the UE  315 - a . The sidelink configuration may indicate limits (e.g., a maximum) for one or more power parameters (such as a PSD, an EIRP, etc.) of the sidelink communications. Additionally or alternatively, the UE  315 - a  may determine the power parameters based on the UEs  315  being located indoors. The UE  315 - a  may receive location information indicating the UEs  315  are located indoors. In some examples, the UE  315 - a  may receive the location information from one or more mechanisms associated with indoor factory automation. Additionally or alternatively, the UE  315 - b  may determine the power parameters based on a sidelink configuration from the AP  306 - b , or based on the UEs  315  being located indoors. The UE  315 - a  may communicate with the UE  315 - b  via the sidelink channel  325  in accordance with the power parameters, which may improve efficiency and reliability of sidelink communications, among other benefits. 
       FIG. 4  illustrates an example of a process flow  400  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. In some examples, the process flow  400  may implement one or more aspects of wireless communications systems  100 ,  200 , or  300 . For example, the process flow  400  may include example operations associated with an AP  406  and one or more UEs  415 , which may be examples of corresponding devices described with reference to  FIGS. 1 through 3 . In the following description of the process flow  400 , the operations between the AP  406  and the UEs  415  may be performed in a different order than the example order shown, or the operations performed by the AP  406  and the UEs  415  may be performed in different orders or at different times. Some operations may also be omitted from the process flow  400 , and other operations may be added to the process flow  400 . The operations performed by the AP  406  and the UEs  415  may support improvements to sidelink communications and, in some examples, may promote improvements to communications efficiency, among other benefits. 
     At  420 , the AP  406  may exchange signaling with the UE  415 - a  on a first channel in a first radio frequency spectrum band. In some examples, the signaling may include the AP  406  transmitting an anchor signal, an SSB, a reference signal, or another signal, or any combination thereof, to the UE  415 - a . Additionally or alternatively, the signaling may include the UE  415 - a  transmitting one or more reference signals to the AP  406 . In some examples, the AP  406  may exchange the signaling with the UE  415 - a  according to a configured operation mode, such as a standard power mode, an LPI mode, a VLP mode, etc. In some examples, the exchanged signaling may indicate the UE  415 - a  and a UE  415 - b  are in communication with an access point, such as the AP  406  or another access point (not shown). 
     At  425 , the AP  406  may determine one or more power parameters for sidelink communications between the UE  415 - a  and the UE  415 - b  on a second channel in a second radio frequency spectrum band. The power parameters may include a PSD, an EIRP, another power parameter, or any combination thereof. In some examples, the AP  406  may determine the power parameters based on the signaling exchanged with the UE  415 - a.    
     At  430 , the AP  406  may transmit a sidelink configuration for the sidelink communications to the UE  415 - a . In some examples, the sidelink configuration may indicate the determined power parameters, an operation mode for the sidelink communications, the second channel, the second radio frequency spectrum band, or any combination thereof. In some examples, the sidelink configuration may be based on the exchanged signaling. 
     At  435 , the UE  415 - a  may determine the power parameters for the sidelink communications between the UE  415 - a  and the UE  415 - b . In some examples, the UE  415 - a  may determine the power parameters based on receiving the sidelink configuration, the exchanged signaling, or both. 
     In some examples, at  440  the UE  415 - a  may determine the operation mode for the sidelink communications. The operation mode may be a standard power mode, an LPI mode, a VLP mode, or another operation mode. In some examples, the UE  415 - a  may determine the operation mode based on receiving the sidelink configuration, the exchanged signaling, or both. 
     At  445 , the UE  415 - a  may communicate with the UE  415 - b  on the second channel in the second radio frequency spectrum band in accordance with the sidelink configuration. The first channel and the second channel may be a same channel or different channels. The first radio frequency spectrum band and the second radio frequency spectrum band may be a same radio frequency spectrum band (e.g., a U-NII band) or different radio frequency spectrum bands. The operations performed by the AP  406  and the UEs  415  may improve efficiency and reliability of the sidelink communications, among other benefits. 
       FIG. 5  illustrates an example of a process flow  500  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. In some examples, the process flow  500  may implement one or more aspects of wireless communications systems  100 ,  200 , or  300 . For example, the process flow  500  may include example operations associated with one or more UEs  515 , which may be examples of corresponding devices described with reference to  FIGS. 1 through 3 . In the following description of the process flow  500 , the operations between the UEs  515  may be performed in a different order than the example order shown, or the operations performed by the UEs  515  may be performed in different orders or at different times. Some operations may also be omitted from the process flow  500 , and other operations may be added to the process flow  500 . The operations performed by the UEs  515  may support improvements to sidelink communications and, in some examples, may promote improvements to communications efficiency, among other benefits. 
     At  520 , a UE  515 - a  may determine location information for the UE  515 - a  and a UE  515 - b . In some examples, the UE  515 - a  may receive the location information (e.g., ultra wideband positioning information, a configuration, a setting, or other location information) indicating the UEs  515  are located indoors. In some examples, the UE  515 - a  may receive the location information from one or more sensors, one or more actuators, or other mechanisms, or any combination thereof, such as mechanisms associated with indoor factory automation. 
     At  525 , the UE  515 - a  may determine one or more power parameters for sidelink communications between the UE  515 - a  and the UE  515 - b  on a channel in a radio frequency spectrum band. The power parameters may include a PSD, an EIRP, another power parameter, or any combination thereof. In some examples, the UE  515 - a  may determine the power parameters based on the determining the UEs  515  are located indoors. 
     In some examples, the UE  515 - a  may determine the operation mode for the sidelink communications. The operation mode may be a standard power mode, an LPI mode, a VLP mode, or another operation mode. In some examples, the UE  515 - a  may determine the operation mode based on the determining the UEs  515  are located indoors. 
     At  535 , the UE  515 - a  may communicate with the UE  515 - b  on the channel in the radio frequency spectrum band in accordance with the determined power parameters. In some examples, the radio frequency spectrum band may be a U-NII band. The operations performed by the UEs  515  may improve efficiency and reliability of the sidelink communications, among other benefits. 
       FIG. 6  shows a block diagram  600  of a device  605  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The device  605  may be an example of aspects of a UE  115  as described herein. The device  605  may include a receiver  610 , a transmitter  615 , and a communications manager  620 . The device  605  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  610  may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to access point assisted sidelink communications). Information may be passed on to other components of the device  605 . The receiver  610  may utilize a single antenna or a set of multiple antennas. 
     The transmitter  615  may provide a means for transmitting signals generated by other components of the device  605 . For example, the transmitter  615  may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to access point assisted sidelink communications). In some examples, the transmitter  615  may be co-located with a receiver  610  in a transceiver module. The transmitter  615  may utilize a single antenna or a set of multiple antennas. 
     The communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations thereof or various components thereof may be examples of means for performing various aspects of access point assisted sidelink communications as described herein. For example, the communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations or components thereof may support a method for performing one or more of the functions described herein. 
     In some examples, the communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory). 
     Additionally or alternatively, in some examples, the communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager  620 , the receiver  610 , the transmitter  615 , or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure). 
     In some examples, the communications manager  620  may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver  610 , the transmitter  615 , or both. For example, the communications manager  620  may receive information from the receiver  610 , send information to the transmitter  615 , or be integrated in combination with the receiver  610 , the transmitter  615 , or both to receive information, transmit information, or perform various other operations as described herein. 
     The communications manager  620  may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager  620  may be configured as or otherwise support a means for receiving, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. The communications manager  620  may be configured as or otherwise support a means for determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel. The communications manager  620  may be configured as or otherwise support a means for communicating with the second UE on the second channel in accordance with the sidelink configuration. 
     Additionally or alternatively, the communications manager  620  may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager  620  may be configured as or otherwise support a means for determining that the first UE is located indoors. The communications manager  620  may be configured as or otherwise support a means for determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors. The communications manager  620  may be configured as or otherwise support a means for communicating with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. 
     By including or configuring the communications manager  620  in accordance with examples as described herein, the device  605  (e.g., a processor controlling or otherwise coupled to the receiver  610 , the transmitter  615 , the communications manager  620 , or a combination thereof) may support techniques for reducing power consumption and increasing transmission reliability. In some aspects, the processor of the device  605  may adjust power parameters based on the sidelink configuration or location information. For example, the processor of the device  605  may turn on one or more processing units for processing a sidelink configuration or sensor data, increase a processing clock, or a similar mechanism within the device  605 . As such, when subsequent sidelink configurations or location data are received, the processor may more accurately adjust power parameters for sidelink communications. Improvements in sidelink communications may result in improvements in power saving and communications reliability, which may further increase power efficiency at the device  605  (e.g., by eliminating unnecessary repeated sidelink configurations). 
       FIG. 7  shows a block diagram  700  of a device  705  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The device  705  may be an example of aspects of a device  605  or a UE  115  as described herein. The device  705  may include a receiver  710 , a transmitter  715 , and a communications manager  720 . The device  705  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  710  may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to access point assisted sidelink communications). Information may be passed on to other components of the device  705 . The receiver  710  may utilize a single antenna or a set of multiple antennas. 
     The transmitter  715  may provide a means for transmitting signals generated by other components of the device  705 . For example, the transmitter  715  may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to access point assisted sidelink communications). In some examples, the transmitter  715  may be co-located with a receiver  710  in a transceiver module. The transmitter  715  may utilize a single antenna or a set of multiple antennas. 
     The device  705 , or various components thereof, may be an example of means for performing various aspects of access point assisted sidelink communications as described herein. For example, the communications manager  720  may include a configuration manager  725 , a power parameter manager  730 , a sidelink communication component  735 , a location manager  740 , or any combination thereof. The communications manager  720  may be an example of aspects of a communications manager  620  as described herein. In some examples, the communications manager  720 , or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver  710 , the transmitter  715 , or both. For example, the communications manager  720  may receive information from the receiver  710 , send information to the transmitter  715 , or be integrated in combination with the receiver  710 , the transmitter  715 , or both to receive information, transmit information, or perform various other operations as described herein. 
     The communications manager  720  may support wireless communications at a first UE in accordance with examples as disclosed herein. The configuration manager  725  may be configured as or otherwise support a means for receiving, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. The power parameter manager  730  may be configured as or otherwise support a means for determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel. The sidelink communication component  735  may be configured as or otherwise support a means for communicating with the second UE on the second channel in accordance with the sidelink configuration. 
     Additionally or alternatively, the communications manager  720  may support wireless communications at a first UE in accordance with examples as disclosed herein. The location manager  740  may be configured as or otherwise support a means for determining that the first UE is located indoors. The power parameter manager  730  may be configured as or otherwise support a means for determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors. The sidelink communication component  735  may be configured as or otherwise support a means for communicating with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. 
       FIG. 8  shows a block diagram  800  of a communications manager  820  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The communications manager  820  may be an example of aspects of a communications manager  620 , a communications manager  720 , or both, as described herein. The communications manager  820 , or various components thereof, may be an example of means for performing various aspects of access point assisted sidelink communications as described herein. For example, the communications manager  820  may include a configuration manager  825 , a power parameter manager  830 , a sidelink communication component  835 , a location manager  840 , a signaling component  845 , an operation mode manager  850 , or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses). 
     The communications manager  820  may support wireless communications at a first UE in accordance with examples as disclosed herein. The configuration manager  825  may be configured as or otherwise support a means for receiving, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. The power parameter manager  830  may be configured as or otherwise support a means for determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel. The sidelink communication component  835  may be configured as or otherwise support a means for communicating with the second UE on the second channel in accordance with the sidelink configuration. 
     In some examples, the signaling component  845  may be configured as or otherwise support a means for receiving one or more signals from the first access point, where the sidelink configuration is received based on receiving the one or more signals, and where the signaling on the first channel includes the one or more signals. 
     In some examples, the one or more signals include an anchor signal, a synchronization signal block, a reference signal, or any combination thereof. 
     In some examples, the signaling component  845  may be configured as or otherwise support a means for transmitting one or more reference signals to the first access point, where the sidelink configuration is received based on transmitting the one or more reference signals, and where the signaling on the first channel includes the one or more reference signals. 
     In some examples, the operation mode manager  850  may be configured as or otherwise support a means for determining a first operation mode for communications with the first access point and a second operation mode for the sidelink communications, where communicating with the second UE on the second channel is in accordance with the second operation mode. 
     In some examples, each of the first operation mode and the second operation mode includes a standard power mode or a low power indoor mode. 
     In some examples, the one or more power parameters include a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
     In some examples, the first channel and the second channel include a same channel. 
     In some examples, the first channel is different from the second channel. 
     In some examples, the first channel and the second channel are in a same radio frequency spectrum band. 
     In some examples, the first channel is in a first radio frequency spectrum band and the second channel is in a second radio frequency spectrum band. 
     Additionally or alternatively, the communications manager  820  may support wireless communications at a first UE in accordance with examples as disclosed herein. The location manager  840  may be configured as or otherwise support a means for determining that the first UE is located indoors. In some examples, the power parameter manager  830  may be configured as or otherwise support a means for determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors. In some examples, the sidelink communication component  835  may be configured as or otherwise support a means for communicating with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. 
     In some examples, the location manager  840  may be configured as or otherwise support a means for receiving location information associated with the first UE, where determining that the first UE is located indoors is based on receiving the location information. 
     In some examples, the location information is received from one or more sensors, one or more actuators, or any combination thereof. 
     In some examples, the location information includes ultra wideband positioning information, a configuration, a setting, or any combination thereof. 
     In some examples, the operation mode manager  850  may be configured as or otherwise support a means for determining an operation mode for the sidelink communications, where communicating with the second UE is in accordance with the operation mode. 
     In some examples, the operation mode includes a standard power mode or a low power indoor mode. 
     In some examples, the one or more power parameters include a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
       FIG. 9  shows a diagram of a system  900  including a device  905  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The device  905  may be an example of or include the components of a device  605 , a device  705 , or a UE  115  as described herein. The device  905  may communicate wirelessly with one or more APs  106 , base stations  105 , UEs  115 , or any combination thereof. The device  905  may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager  920 , an input/output (I/O) controller  910 , a transceiver  915 , an antenna  925 , a memory  930 , code  935 , and a processor  940 . These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus  945 ). 
     The I/O controller  910  may manage input and output signals for the device  905 . The I/O controller  910  may also manage peripherals not integrated into the device  905 . In some cases, the I/O controller  910  may represent a physical connection or port to an external peripheral. In some cases, the I/O controller  910  may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. Additionally or alternatively, the I/O controller  910  may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller  910  may be implemented as part of a processor, such as the processor  940 . In some cases, a user may interact with the device  905  via the I/O controller  910  or via hardware components controlled by the I/O controller  910 . 
     In some cases, the device  905  may include a single antenna  925 . However, in some other cases, the device  905  may have more than one antenna  925 , which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver  915  may communicate bi-directionally, via the one or more antennas  925 , wired, or wireless links as described herein. For example, the transceiver  915  may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver  915  may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas  925  for transmission, and to demodulate packets received from the one or more antennas  925 . The transceiver  915 , or the transceiver  915  and one or more antennas  925 , may be an example of a transmitter  615 , a transmitter  715 , a receiver  610 , a receiver  710 , or any combination thereof or component thereof, as described herein. 
     The memory  930  may include random access memory (RAM) and read-only memory (ROM). The memory  930  may store computer-readable, computer-executable code  935  including instructions that, when executed by the processor  940 , cause the device  905  to perform various functions described herein. The code  935  may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code  935  may not be directly executable by the processor  940  but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory  930  may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices. 
     The processor  940  may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor  940  may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor  940 . The processor  940  may be configured to execute computer-readable instructions stored in a memory (e.g., the memory  930 ) to cause the device  905  to perform various functions (e.g., functions or tasks supporting access point assisted sidelink communications). For example, the device  905  or a component of the device  905  may include a processor  940  and memory  930  coupled to the processor  940 , the processor  940  and memory  930  configured to perform various functions described herein. 
     The communications manager  920  may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager  920  may be configured as or otherwise support a means for receiving, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. The communications manager  920  may be configured as or otherwise support a means for determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel. The communications manager  920  may be configured as or otherwise support a means for communicating with the second UE on the second channel in accordance with the sidelink configuration. 
     Additionally or alternatively, the communications manager  920  may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager  920  may be configured as or otherwise support a means for determining that the first UE is located indoors. The communications manager  920  may be configured as or otherwise support a means for determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors. The communications manager  920  may be configured as or otherwise support a means for communicating with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. 
     By including or configuring the communications manager  920  in accordance with examples as described herein, the device  905  may support techniques for saving power by communicating with UEs  115  (as shown in  FIG. 1 ) in sidelink communications more efficiently. For example, the device  905  may improve reliability in sidelink communications with UEs  115 , as the device  905  may be able to reliably adjust power parameters for the sidelink communications based on a received sidelink configuration or determined location data. Using the techniques described herein, the device  905  may more accurately communicate with UEs  115 , which may improve power efficiency at the device  905 . 
     In some examples, the communications manager  920  may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver  915 , the one or more antennas  925 , or any combination thereof. Although the communications manager  920  is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager  920  may be supported by or performed by the processor  940 , the memory  930 , the code  935 , or any combination thereof. For example, the code  935  may include instructions executable by the processor  940  to cause the device  905  to perform various aspects of access point assisted sidelink communications as described herein, or the processor  940  and the memory  930  may be otherwise configured to perform or support such operations. 
       FIG. 10  shows a block diagram  1000  of a device  1005  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The device  1005  may be an example of aspects of an AP  106  as described herein. The device  1005  may include a receiver  1010 , a transmitter  1015 , and a communications manager  1020 . The device  1005  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  1010  may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to access point assisted sidelink communications). Information may be passed on to other components of the device  1005 . The receiver  1010  may utilize a single antenna or a set of multiple antennas. 
     The transmitter  1015  may provide a means for transmitting signals generated by other components of the device  1005 . For example, the transmitter  1015  may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to access point assisted sidelink communications). In some examples, the transmitter  1015  may be co-located with a receiver  1010  in a transceiver module. The transmitter  1015  may utilize a single antenna or a set of multiple antennas. 
     The communications manager  1020 , the receiver  1010 , the transmitter  1015 , or various combinations thereof or various components thereof may be examples of means for performing various aspects of access point assisted sidelink communications as described herein. For example, the communications manager  1020 , the receiver  1010 , the transmitter  1015 , or various combinations or components thereof may support a method for performing one or more of the functions described herein. 
     In some examples, the communications manager  1020 , the receiver  1010 , the transmitter  1015 , or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory). 
     Additionally or alternatively, in some examples, the communications manager  1020 , the receiver  1010 , the transmitter  1015 , or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager  1020 , the receiver  1010 , the transmitter  1015 , or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure). 
     In some examples, the communications manager  1020  may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver  1010 , the transmitter  1015 , or both. For example, the communications manager  1020  may receive information from the receiver  1010 , send information to the transmitter  1015 , or be integrated in combination with the receiver  1010 , the transmitter  1015 , or both to receive information, transmit information, or perform various other operations as described herein. 
     The communications manager  1020  may support wireless communications at a first access point in accordance with examples as disclosed herein. For example, the communications manager  1020  may be configured as or otherwise support a means for determining one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel. The communications manager  1020  may be configured as or otherwise support a means for transmitting, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. 
     By including or configuring the communications manager  1020  in accordance with examples as described herein, the device  1005  (e.g., a processor controlling or otherwise coupled to the receiver  1010 , the transmitter  1015 , the communications manager  1020 , or a combination thereof) may support techniques for efficient configuration of sidelink communications. In some aspects, the processor of the device  1005  may adjust power parameters for sidelink communications between UEs based on signaling exchanged with the UEs. For example, the processor of the device  1005  may turn on one or more processing units for processing exchanged signaling, increase a processing clock, or a similar mechanism within the device  1005 . As such, when subsequent sidelink communications are to be configured, the processor may more accurately determine associated power parameters. Improvements in sidelink communication configuration may result in improvements in power saving and communications reliability, which may further increase power efficiency at the device  1005  (e.g., by eliminating unnecessary repeated transmissions due to interference). 
       FIG. 11  shows a block diagram  1100  of a device  1105  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The device  1105  may be an example of aspects of a device  1005  or an AP  106  as described herein. The device  1105  may include a receiver  1110 , a transmitter  1115 , and a communications manager  1120 . The device  1105  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  1110  may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to access point assisted sidelink communications). Information may be passed on to other components of the device  1105 . The receiver  1110  may utilize a single antenna or a set of multiple antennas. 
     The transmitter  1115  may provide a means for transmitting signals generated by other components of the device  1105 . For example, the transmitter  1115  may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to access point assisted sidelink communications). In some examples, the transmitter  1115  may be co-located with a receiver  1110  in a transceiver module. The transmitter  1115  may utilize a single antenna or a set of multiple antennas. 
     The device  1105 , or various components thereof, may be an example of means for performing various aspects of access point assisted sidelink communications as described herein. For example, the communications manager  1120  may include a power parameter component  1125  a sidelink configuration manager  1130 , or any combination thereof. The communications manager  1120  may be an example of aspects of a communications manager  1020  as described herein. In some examples, the communications manager  1120 , or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver  1110 , the transmitter  1115 , or both. For example, the communications manager  1120  may receive information from the receiver  1110 , send information to the transmitter  1115 , or be integrated in combination with the receiver  1110 , the transmitter  1115 , or both to receive information, transmit information, or perform various other operations as described herein. 
     The communications manager  1120  may support wireless communications at a first access point in accordance with examples as disclosed herein. The power parameter component  1125  may be configured as or otherwise support a means for determining one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel. The sidelink configuration manager  1130  may be configured as or otherwise support a means for transmitting, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. 
       FIG. 12  shows a block diagram  1200  of a communications manager  1220  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The communications manager  1220  may be an example of aspects of a communications manager  1020 , a communications manager  1120 , or both, as described herein. The communications manager  1220 , or various components thereof, may be an example of means for performing various aspects of access point assisted sidelink communications as described herein. For example, the communications manager  1220  may include a power parameter component  1225 , a sidelink configuration manager  1230 , a signaling manager  1235 , an operation mode component  1240 , or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses). 
     The communications manager  1220  may support wireless communications at a first access point in accordance with examples as disclosed herein. The power parameter component  1225  may be configured as or otherwise support a means for determining one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel. The sidelink configuration manager  1230  may be configured as or otherwise support a means for transmitting, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. 
     In some examples, the signaling manager  1235  may be configured as or otherwise support a means for transmitting one or more signals to the first UE, where the one or more power parameters are determined based on transmitting the one or more signals, and where the signaling on the first channel includes the one or more signals. 
     In some examples, the one or more signals include an anchor signal, a synchronization signal block, a reference signal, or any combination thereof. 
     In some examples, the signaling manager  1235  may be configured as or otherwise support a means for receiving one or more reference signals from the first UE, where the one or more power parameters are determined based on receiving the one or more reference signals, and where the signaling on the first channel includes the one or more reference signals. 
     In some examples, the operation mode component  1240  may be configured as or otherwise support a means for determining a first operation mode for communications with the first UE and a second operation mode for the sidelink communications, where communicating with the first UE on the first channel is in accordance with the first operation mode. 
     In some examples, each of the first operation mode and the second operation mode includes a standard power mode or a low power indoor mode. 
     In some examples, the one or more power parameters include a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
     In some examples, the first channel and the second channel include a same channel. 
     In some examples, the first channel is different from the second channel. 
     In some examples, the first channel and the second channel are in a same radio frequency spectrum band. 
     In some examples, the first channel is in a first radio frequency spectrum band and the second channel is in a second radio frequency spectrum band. 
       FIG. 13  shows a diagram of a system  1300  including a device  1305  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The device  1305  may be an example of or include the components of a device  1005 , a device  1105 , or an AP  106  as described herein. The device  1305  may communicate wirelessly with one or more APs  106 , base stations  105 , UEs  115 , or any combination thereof. The device  1305  may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager  1320 , a network communications manager  1310 , a transceiver  1315 , an antenna  1325 , a memory  1330 , code  1335 , a processor  1340 , and an inter-station communications manager  1345 . These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus  1350 ). 
     The network communications manager  1310  may manage communications with a core network  130  (e.g., via one or more wired backhaul links). For example, the network communications manager  1310  may manage the transfer of data communications for client devices, such as one or more UEs  115 . 
     In some cases, the device  1305  may include a single antenna  1325 . However, in some other cases the device  1305  may have more than one antenna  1325 , which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver  1315  may communicate bi-directionally, via the one or more antennas  1325 , wired, or wireless links as described herein. For example, the transceiver  1315  may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver  1315  may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas  1325  for transmission, and to demodulate packets received from the one or more antennas  1325 . The transceiver  1315 , or the transceiver  1315  and one or more antennas  1325 , may be an example of a transmitter  1015 , a transmitter  1115 , a receiver  1010 , a receiver  1110 , or any combination thereof or component thereof, as described herein. 
     The memory  1330  may include RAM and ROM. The memory  1330  may store computer-readable, computer-executable code  1335  including instructions that, when executed by the processor  1340 , cause the device  1305  to perform various functions described herein. The code  1335  may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code  1335  may not be directly executable by the processor  1340  but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory  1330  may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices. 
     The processor  1340  may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor  1340  may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor  1340 . The processor  1340  may be configured to execute computer-readable instructions stored in a memory (e.g., the memory  1330 ) to cause the device  1305  to perform various functions (e.g., functions or tasks supporting access point assisted sidelink communications). For example, the device  1305  or a component of the device  1305  may include a processor  1340  and memory  1330  coupled to the processor  1340 , the processor  1340  and memory  1330  configured to perform various functions described herein. 
     The inter-station communications manager  1345  may manage communications with other base stations  105  or APs  106 , and may include a controller or scheduler for controlling communications with UEs  115  in cooperation with other base stations  105  or APs  106 . For example, the inter-station communications manager  1345  may coordinate scheduling for transmissions to UEs  115  for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager  1345  may provide an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between base stations  105  or APs  106 . 
     The communications manager  1320  may support wireless communications at a first access point in accordance with examples as disclosed herein. For example, the communications manager  1320  may be configured as or otherwise support a means for determining one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel. The communications manager  1320  may be configured as or otherwise support a means for transmitting, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. 
     By including or configuring the communications manager  1320  in accordance with examples as described herein, the device  1305  may support techniques for saving power by communicating with UEs  115  (as shown in  FIG. 1 ) more efficiently. For example, the device  1306  may improve reliability in communications with UEs  115 , as the device  1306  may be able to reliably configure sidelink communications between UEs  115  to reduce interference. Using the techniques described herein, the device  1306  may more accurately communicate with UEs  115 , which may improve power efficiency at the device  1306 . 
     In some examples, the communications manager  1320  may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver  1315 , the one or more antennas  1325 , or any combination thereof. Although the communications manager  1320  is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager  1320  may be supported by or performed by the processor  1340 , the memory  1330 , the code  1335 , or any combination thereof. For example, the code  1335  may include instructions executable by the processor  1340  to cause the device  1305  to perform various aspects of access point assisted sidelink communications as described herein, or the processor  1340  and the memory  1330  may be otherwise configured to perform or support such operations. 
       FIG. 14  shows a flowchart illustrating a method  1400  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The operations of the method  1400  may be implemented by a UE or its components as described herein. For example, the operations of the method  1400  may be performed by a UE  115  as described with reference to  FIGS. 1 through 9 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1405 , the method may include receiving, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. The operations of  1405  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1405  may be performed by a configuration manager  825  as described with reference to  FIG. 8 . 
     At  1410 , the method may include determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on signaling on the first channel. The operations of  1410  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1410  may be performed by a power parameter manager  830  as described with reference to  FIG. 8 . 
     At  1415 , the method may include communicating with the second UE on the second channel in accordance with the sidelink configuration. The operations of  1415  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1415  may be performed by a sidelink communication component  835  as described with reference to  FIG. 8 . 
       FIG. 15  shows a flowchart illustrating a method  1500  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The operations of the method  1500  may be implemented by a UE or its components as described herein. For example, the operations of the method  1500  may be performed by a UE  115  as described with reference to  FIGS. 1 through 9 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1505 , the method may include receiving one or more signals from a first access point. The operations of  1505  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1505  may be performed by a signaling component  845  as described with reference to  FIG. 8 . 
     At  1510 , the method may include receiving, from the first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on receiving the one or more signals and both the first UE and the second UE being in communication with an access point. The operations of  1510  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1510  may be performed by a configuration manager  825  as described with reference to  FIG. 8 . 
     At  1515 , the method may include determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on receiving the one or more signals on the first channel. The operations of  1515  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1515  may be performed by a power parameter manager  830  as described with reference to  FIG. 8 . 
     At  1520 , the method may include communicating with the second UE on the second channel in accordance with the sidelink configuration. The operations of  1520  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1520  may be performed by a sidelink communication component  835  as described with reference to  FIG. 8 . 
       FIG. 16  shows a flowchart illustrating a method  1600  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The operations of the method  1600  may be implemented by a UE or its components as described herein. For example, the operations of the method  1600  may be performed by a UE  115  as described with reference to  FIGS. 1 through 9 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1605 , the method may include transmitting one or more reference signals to a first access point. The operations of  1605  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1605  may be performed by a signaling component  845  as described with reference to  FIG. 8 . 
     At  1610 , the method may include receiving, from the first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, where the sidelink configuration is provided to the first UE based on transmitting the one or more reference signals and both the first UE and the second UE being in communication with an access point. The operations of  1610  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1610  may be performed by a configuration manager  825  as described with reference to  FIG. 8 . 
     At  1615 , the method may include determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based on transmitting the one or more reference signals on the first channel. The operations of  1615  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1615  may be performed by a power parameter manager  830  as described with reference to  FIG. 8 . 
     At  1620 , the method may include communicating with the second UE on the second channel in accordance with the sidelink configuration. The operations of  1620  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1620  may be performed by a sidelink communication component  835  as described with reference to  FIG. 8 . 
       FIG. 17  shows a flowchart illustrating a method  1700  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The operations of the method  1700  may be implemented by an AP or its components as described herein. For example, the operations of the method  1700  may be performed by an AP  106  as described with reference to  FIGS. 1 through 5, and 10 through 13 . In some examples, an AP may execute a set of instructions to control the functional elements of the AP to perform the described functions. Additionally or alternatively, the AP may perform aspects of the described functions using special-purpose hardware. 
     At  1705 , the method may include determining one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based on signaling on a first channel. The operations of  1705  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1705  may be performed by a power parameter component  1225  as described with reference to  FIG. 12 . 
     At  1710 , the method may include transmitting, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, where the sidelink configuration is provided to the first UE based on both the first UE and the second UE being in communication with an access point. The operations of  1710  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1710  may be performed by a sidelink configuration manager  1230  as described with reference to  FIG. 12 . 
       FIG. 18  shows a flowchart illustrating a method  1800  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The operations of the method  1800  may be implemented by a UE or its components as described herein. For example, the operations of the method  1800  may be performed by a UE  115  as described with reference to  FIGS. 1 through 9 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1805 , the method may include determining that the first UE is located indoors. The operations of  1805  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1805  may be performed by a location manager  840  as described with reference to  FIG. 8 . 
     At  1810 , the method may include determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors. The operations of  1810  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1810  may be performed by a power parameter manager  830  as described with reference to  FIG. 8 . 
     At  1815 , the method may include communicating with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. The operations of  1815  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1815  may be performed by a sidelink communication component  835  as described with reference to  FIG. 8 . 
       FIG. 19  shows a flowchart illustrating a method  1900  that supports access point assisted sidelink communications in accordance with aspects of the present disclosure. The operations of the method  1900  may be implemented by a UE or its components as described herein. For example, the operations of the method  1900  may be performed by a UE  115  as described with reference to  FIGS. 1 through 9 . In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware. 
     At  1905 , the method may include receiving location information associated with the first UE. The operations of  1905  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1905  may be performed by a location manager  840  as described with reference to  FIG. 8 . 
     At  1910 , the method may include determining that the first UE is located indoors based on receiving the location information. The operations of  1910  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1910  may be performed by a location manager  840  as described with reference to  FIG. 8 . 
     At  1915 , the method may include determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors. The operations of  1915  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1915  may be performed by a power parameter manager  830  as described with reference to  FIG. 8 . 
     At  1920 , the method may include communicating with a second UE via the sidelink communications based on the UE being located indoors and the one or more power parameters. The operations of  1920  may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of  1920  may be performed by a sidelink communication component  835  as described with reference to  FIG. 8 . 
     The following provides an overview of aspects of the present disclosure: 
     Aspect 1: A method for wireless communications at a first UE, comprising: receiving, from a first access point on a first channel, a sidelink configuration for sidelink communications with a second UE on a second channel, wherein the sidelink configuration is provided to the first UE based at least in part on both the first UE and the second UE being in communication with an access point; determining one or more power parameters from the sidelink configuration, the one or more power parameters being for the sidelink communications and being based at least in part on signaling on the first channel; and communicating with the second UE on the second channel in accordance with the sidelink configuration. 
     Aspect 2: The method of aspect 1, further comprising: receiving one or more signals from the first access point, wherein the sidelink configuration is received based at least in part on receiving the one or more signals, and wherein the signaling on the first channel comprises the one or more signals. 
     Aspect 3: The method of aspect 2, wherein the one or more signals comprise an anchor signal, a synchronization signal block, a reference signal, or any combination thereof. 
     Aspect 4: The method of any of aspects 1 through 3, further comprising: transmitting one or more reference signals to the first access point, wherein the sidelink configuration is received based at least in part on transmitting the one or more reference signals, and wherein the signaling on the first channel comprises the one or more reference signals. 
     Aspect 5: The method of any of aspects 1 through 4, further comprising: determining a first operation mode for communications with the first access point and a second operation mode for the sidelink communications, wherein communicating with the second UE on the second channel is in accordance with the second operation mode. 
     Aspect 6: The method of aspect 5, wherein each of the first operation mode and the second operation mode comprises a standard power mode or a low power indoor mode. 
     Aspect 7: The method of any of aspects 1 through 6, wherein the one or more power parameters comprise a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
     Aspect 8: The method of any of aspects 1 through 7, wherein the first channel and the second channel comprise a same channel. 
     Aspect 9: The method of any of aspects 1 through 7, wherein the first channel is different from the second channel. 
     Aspect 10: The method of any of aspects 1 through 9, wherein the first channel and the second channel are in a same radio frequency spectrum band. 
     Aspect 11: The method of any of aspects 1 through 9, wherein the first channel is in a first radio frequency spectrum band and the second channel is in a second radio frequency spectrum band. 
     Aspect 12: A method for wireless communications at a first access point, comprising: determining one or more power parameters for sidelink communications between a first UE and a second UE, the one or more power parameters based at least in part on signaling on a first channel; and transmitting, to the first UE on the first channel, a sidelink configuration for the sidelink communications on a second channel, wherein the sidelink configuration is provided to the first UE based at least in part on both the first UE and the second UE being in communication with an access point. 
     Aspect 13: The method of aspect 12, further comprising: transmitting one or more signals to the first UE, wherein the one or more power parameters are determined based at least in part on transmitting the one or more signals, and wherein the signaling on the first channel comprises the one or more signals. 
     Aspect 14: The method of aspect 13, wherein the one or more signals comprise an anchor signal, a synchronization signal block, a reference signal, or any combination thereof. 
     Aspect 15: The method of any of aspects 12 through 14, further comprising: receiving one or more reference signals from the first UE, wherein the one or more power parameters are determined based at least in part on receiving the one or more reference signals, and wherein the signaling on the first channel comprises the one or more reference signals. 
     Aspect 16: The method of any of aspects 12 through 15, further comprising: determining a first operation mode for communications with the first UE and a second operation mode for the sidelink communications, wherein communicating with the first UE on the first channel is in accordance with the first operation mode. 
     Aspect 17: The method of aspect 16, wherein each of the first operation mode and the second operation mode comprises a standard power mode or a low power indoor mode. 
     Aspect 18: The method of any of aspects 12 through 17, wherein the one or more power parameters comprise a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
     Aspect 19: The method of any of aspects 12 through 18, wherein the first channel and the second channel comprise a same channel. 
     Aspect 20: The method of any of aspects 12 through 18, wherein the first channel is different from the second channel. 
     Aspect 21: The method of any of aspects 12 through 20, wherein the first channel and the second channel are in a same radio frequency spectrum band. 
     Aspect 22: The method of any of aspects 12 through 20, wherein the first channel is in a first radio frequency spectrum band and the second channel is in a second radio frequency spectrum band. 
     Aspect 23: A method for wireless communications at a first UE, comprising: determining that the first UE is located indoors; determining one or more power parameters for sidelink communications that are facilitated by the first UE being located indoors; and communicating with a second UE via the sidelink communications based at least in part on the UE being located indoors and the one or more power parameters. 
     Aspect 24: The method of aspect 23, further comprising: receiving location information associated with the first UE, wherein determining that the first UE is located indoors is based at least in part on receiving the location information. 
     Aspect 25: The method of aspect 24, wherein the location information is received from one or more sensors, one or more actuators, or any combination thereof. 
     Aspect 26: The method of any of aspects 24 through 25, wherein the location information comprises ultra wideband positioning information, a configuration, a setting, or any combination thereof. 
     Aspect 27: The method of any of aspects 23 through 26, further comprising: determining an operation mode for the sidelink communications, wherein communicating with the second UE is in accordance with the operation mode. 
     Aspect 28: The method of aspect 27, wherein the operation mode comprises a standard power mode or a low power indoor mode. 
     Aspect 29: The method of any of aspects 23 through 28, wherein the one or more power parameters comprise a power spectral density of the sidelink communications, an equivalent isotropic radiated power of the sidelink communications, or both. 
     Aspect 30: An apparatus for wireless communications at a first UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 1 through 11. 
     Aspect 31: An apparatus for wireless communications at a first UE, comprising at least one means for performing a method of any of aspects 1 through 11. 
     Aspect 32: A non-transitory computer-readable medium storing code for wireless communications at a first UE, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 11. 
     Aspect 33: An apparatus for wireless communications at a first access point, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 12 through 22. 
     Aspect 34: An apparatus for wireless communications at a first access point, comprising at least one means for performing a method of any of aspects 12 through 22. 
     Aspect 35: A non-transitory computer-readable medium storing code for wireless communications at a first access point, the code comprising instructions executable by a processor to perform a method of any of aspects 12 through 22. 
     Aspect 36: An apparatus for wireless communications at a first UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 23 through 29. 
     Aspect 37: An apparatus for wireless communications at a first UE, comprising at least one means for performing a method of any of aspects 23 through 29. 
     Aspect 38: A non-transitory computer-readable medium storing code for wireless communications at a first UE, the code comprising instructions executable by a processor to perform a method of any of aspects 23 through 29. 
     It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined. 
     Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein. 
     Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof. 
     The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration). 
     The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. 
     Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media. 
     As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.” 
     In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label. 
     The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples. 
     The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.