Abstract: A wireless device may receive a first set of beacon messages from a first set of proximity devices. The wireless device may measure the first set of beacon messages. The wireless device may calculate a first position estimate of the wireless device based on the measured first set of beacon messages and a first set of locations associated with the first set of proximity devices. The wireless device may transmit the first position estimate. The wireless device may receive a second set of beacon messages from a subset of a second set of proximity devices based on the first position estimate. The wireless device may measure the second set of beacon messages. The wireless device may calculate a second position estimate based on the measured second set of beacon messages and a second set of locations associated with the subset of the second set of proximity devices.

Abstract: Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, a wireless communication device can receive an energizing signal from an energizer and can harvest energy from the energizing signal. The wireless communication device can synchronize, based on one of the energizing signal or a beacon signal, timing for a timing schedule associated with the wireless communication device. The wireless communication device can transmit a signal according to the timing schedule associated with the wireless communication device.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmission device may receive sensing information. The transmission device may transmit a radio frequency (RF) signal configured to power an RF energy harvesting device based at least in part on the sensing information satisfying a condition associated with a presence of an object. Numerous other aspects are described.

Abstract: Various aspects related to techniques for harmonization between common reference signal (CRS) and demodulation reference signal (DM-RS) based transmission modes (TMs) in unlicensed spectrum are described. In one aspect, a downlink/uplink (DL/UL) subframe configuration may be signaled for each subframe. Information provided by the DL/UL subframe configuration may indicate whether the respective downlink subframe is a single-frequency network (MBSFN) subframe (associated with DM-RS-based TM) or a non-MBSFN subframe (associated with CRS-based TM). In another aspect, periodic as well as aperiodic channel state information (CSI) reporting requests may be supported. In yet another aspect, discontinued reception (DRX) wake ups for unlicensed carriers may be explicitly or implicitly indicated to a user equipment (UE) via a carrier in a licensed spectrum.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station operating in unlicensed spectrum may temporarily increase a paging opportunity window (POW) size, or reduce a time between POWs, in order to meet performance metrics or account for time periods when a base station is unable to win access to the wireless medium during a POW. In some cases, a UE may identify a failed listen-before-talk procedure and autonomously update the POW size. In other examples, a base station may initiate a change in POW size or increase a number of paging opportunities in order to meet achieve one or more key performance indicators (KPIs). After a predetermined period, or after a triggering condition is no longer present, the UE and the base station may reset the POW size or the number of paging opportunities to a nominal amount to conserve power.

Abstract: The present disclosure relates to resolving out-of-sync uplink grants for communication in an unlicensed spectrum. For example, a user equipment (UE) may receive an uplink grant from a network entity on a downlink communication channel, wherein the uplink grant is associated with a system frame number (SFN). The UE may further determine, based on the SFN, that the uplink grant is out of order with one or more stored uplink grants within a queue. Additionally, the UE may insert the uplink grant in an ordered position within the queue relative to the one or more stored uplink grants.

Abstract: The present disclosure relates to resolving out-of-sync uplink grants for communication in an unlicensed spectrum. For example, a user equipment (UE) may receive an uplink grant from a network entity on a downlink communication channel, wherein the uplink grant is associated with a system frame number (SFN). The UE may further determine, based on the SFN, that the uplink grant is out of order with one or more stored uplink grants within a queue. Additionally, the UE may insert the uplink grant in an ordered position within the queue relative to the one or more stored uplink grants.

Abstract: Aspects of the present disclosure provide a plurality of discovery reference signal (DRS) search modes implemented by the user equipment (UE) during contention-based communication in an unlicensed spectrum. The plurality of DRS search modes may include a first DRS search mode (“Full search mode”), second DRS search mode (“Comb search mode”), and a third DRS search mode (“Thin search mode”). The DRS search modes may be selected by the UE based on the system requirements (e.g., tradeoffs between robustness and complexity against cycle cost). Features of the present disclosure further provide techniques for dynamically switching between the plurality of DRS search modes in order to minimize power consumption while reducing the number of cycles required to locate the DRS.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for enhanced paging to a UE being served by a cell over a shared frequency band. The enhanced paging may include multiple paging intervals for each paging cycle. The UE may enable reception for a paging interval and determine whether the UE receives a downlink transmission. The UE may lengthen a paging interval or enable reception during a second paging interval based in part on determining whether the UE receives a downlink transmission. In some examples, the UE may receive a paging queue status indication indicating that paging information will be transmitted during a paging interval or a later interval, or indicating that no paging information is present at a serving cell.

Abstract: Methods, systems, and devices for wireless communication are described. A wireless system may support efficient techniques for adding license assisted access (LAA) secondary cells (SCells) to a secondary timing advance group (sTAG). For example, a base station may determine whether to add an LAA SCell to an sTAG based on whether the LAA SCell is a scheduling carrier for a user equipment (UE). That is, the base station may determine whether to add an LAA SCell to an sTAG based on whether a UE scheduled to communicate over the LAA SCell is self-scheduled over the LAA SCell or cross-carrier scheduled over another cell. As such, the wireless system may improve the likelihood that a UE may receive a downlink transmission over an LAA SCell in an sTAG that the UE may use to determine a downlink timing reference for an uplink transmission over the LAA SCell.

Abstract: In one aspect, disclosed herein are devices, systems, and methods for assessing human health states based on non-shadow imaging of sclera, or whites, of one or both eyes. In one aspect, the device is an on-body device. In one aspect, the system comprises a positioning aperture, an illuminating apparatus, an imaging apparatus, and/or a processing apparatus. In one aspect, the process only takes a short period of time to take images of the sclera without any operation of splicing multiple images. In one aspect, the device or system improves the quality of images by avoiding the formation of reflection of the illuminating apparatus on the images of the sclera. In a further aspect, the system can utilize the sclera images to obtain information of eye diseases and to predict the physiological and pathological changes in the health status of subject or diagnostic results, which can provide helpful information for medical diagnosis.

Abstract: In wireless communication networks using carrier aggregation including a secondary component carrier in unlicensed spectrum, a user equipment (UE) may monitor a downlink radio link quality of secondary cells for an event indicating failure of a communication link in the unlicensed spectrum with a secondary cell. The UE detects one or more failure events based on the downlink radio link quality. When a designated set of failure events is detected, the UE declares a failure state on the secondary cell. In response to the failure state, the UE may adjust operations related to the secondary component carrier in the unlicensed spectrum in order to save power and resources.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for enhanced paging to a UE being served by a cell over a shared frequency band. The enhanced paging may include multiple paging intervals for each paging cycle. The UE may enable reception for a paging interval and determine whether the UE receives a downlink transmission. The UE may lengthen a paging interval or enable reception during a second paging interval based in part on determining whether the UE receives a downlink transmission. In some examples, the UE may receive a paging queue status indication indicating that paging information will be transmitted during a paging interval or a later interval, or indicating that no paging information is present at a serving cell.

Abstract: Aspects of the present disclosure provide a plurality of discovery reference signal (DRS) search modes implemented by the user equipment (UE) during contention-based communication in an unlicensed spectrum. The plurality of DRS search modes may include a first DRS search mode (“Full search mode”), second DRS search mode (“Comb search mode”), and a third DRS search mode (“Thin search mode”). The DRS search modes may be selected by the UE based on the system requirements (e.g., tradeoffs between robustness and complexity against cycle cost). Features of the present disclosure further provide techniques for dynamically switching between the plurality of DRS search modes in order to minimize power consumption while reducing the number of cycles required to locate the DRS.

Abstract: Methods, systems, and devices for wireless communication are described. A wireless system may support efficient techniques for adding license assisted access (LAA) secondary cells (SCells) to a secondary timing advance group (sTAG). For example, a base station may determine whether to add an LAA SCell to an sTAG based on whether the LAA SCell is a scheduling carrier for a user equipment (UE). That is, the base station may determine whether to add an LAA SCell to an sTAG based on whether a UE scheduled to communicate over the LAA SCell is self-scheduled over the LAA SCell or cross-carrier scheduled over another cell. As such, the wireless system may improve the likelihood that a UE may receive a downlink transmission over an LAA SCell in an sTAG that the UE may use to determine a downlink timing reference for an uplink transmission over the LAA SCell.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for enhanced paging to a UE being served by a cell over a shared frequency band. The enhanced paging may include multiple paging intervals for each paging cycle. The UE may enable reception for a paging interval and determine whether the UE receives a downlink transmission. The UE may lengthen a paging interval or enable reception during a second paging interval based in part on determining whether the UE receives a downlink transmission. In some examples, the UE may receive a paging queue status indication indicating that paging information will be transmitted during a paging interval or a later interval, or indicating that no paging information is present at a serving cell.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station operating in unlicensed spectrum may temporarily increase a paging opportunity window (POW) size, or reduce a time between POWs, in order to meet performance metrics or account for time periods when a base station is unable to win access to the wireless medium during a POW. In some cases, a UE may identify a failed listen-before-talk procedure and autonomously update the POW size. In other examples, a base station may initiate a change in POW size or increase a number of paging opportunities in order to meet achieve one or more key performance indicators (KPIs). After a predetermined period, or after a triggering condition is no longer present, the UE and the base station may reset the POW size or the number of paging opportunities to a nominal amount to conserve power.

Abstract: In wireless communication networks using carrier aggregation including a secondary component carrier in unlicensed spectrum, a user equipment (UE) may monitor a downlink radio link quality of secondary cells for an event indicating failure of a communication link in the unlicensed spectrum with a secondary cell. The UE detects one or more failure events based on the downlink radio link quality. When a designated set of failure events is detected, the UE declares a failure state on the secondary cell. In response to the failure state, the UE may adjust operations related to the secondary component carrier in the unlicensed spectrum in order to save power and resources.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for enhanced paging to a UE being served by a cell over a shared frequency band. The enhanced paging may include multiple paging intervals for each paging cycle. The UE may enable reception for a paging interval and determine whether the UE receives a downlink transmission. The UE may lengthen a paging interval or enable reception during a second paging interval based in part on determining whether the UE receives a downlink transmission. In some examples, the UE may receive a paging queue status indication indicating that paging information will be transmitted during a paging interval or a later interval, or indicating that no paging information is present at a serving cell.

Abstract: In one aspect, disclosed herein are devices, systems, and methods for assessing human health states based on non-shadow imaging of sclera, or whites, of one or both eyes. In one aspect, the device is an on-body device. In one aspect, the system comprises a positioning aperture, an illuminating apparatus, an imaging apparatus, and/or a processing apparatus. In one aspect, the process only takes a short period of time to take images of the sclera without any operation of splicing multiple images. In one aspect, the device or system improves the quality of images by avoiding the formation of reflection of the illuminating apparatus on the images of the sclera. In a further aspect, the system can utilize the sclera images to obtain information of eye diseases and to predict the physiological and pathological changes in the health status of subject or diagnostic results, which can provide helpful information for medical diagnosis.