Abstract: Techniques for performing listen before talk (LBT) channel contention procedures in a shared radio frequency spectrum band are provided. The LBT techniques may include a shortened LBT procedure that may be selected if a base station has reserved a shared channel for a duration of expected user equipment (UE) uplink transmissions, and a full LBT procedure that may be selected if the base station has not reserved the channel for the duration of expected UE uplink transmissions. The shortened LBT procedure may include detecting energy levels of the channel for a relatively short time period relative to the full LBT procedure. The shortened LBT procedure may be selected if a time period between a UE receiving a grant of uplink resources and the beginning of the uplink resources is less than a threshold time value.

Abstract: Methods, systems, and devices for wireless communications are described. The method may include determining multiple transmission beams (e.g., beamformed directional beams) for transmission of an opportunistic or multi-beam discovery reference signal (DRS) over a shared radio frequency spectrum band. A base station may perform a listen before talk (LBT) procedure for the multiple DRS transmission beams, and transmit, based on the LBT procedure, the DRS over the shared radio frequency spectrum band using a set of the multiple transmission beams (e.g., a set that cleared an LBT procedure). In some cases, the LBT may be performed for each transmission beam, or for a union of all transmission beams, associated with the DRS transmission beams. Alternatively, the base station may determine a contention exempt transmission (CET) period for the shared spectrum band and transmit the DRS using the multiple transmission beams during CET period.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may attempt to access a network at a local area network access point without prior context information. The access point may be a hotspot operating in unlicensed spectrum according to a Long Term Evolution (LTE)-based standard. The UE may be unable to determine if it is authorized to access the network, so the UE may attempt to obtain system information that provides a list of service providers supported by the network. The UE may then determine whether it has credentials for a supported service provider, and the UE may access the network using those credentials when a supported service provider is recognized. Other broadcast messages may provide information about system information for supported service providers. A UE that is unable to access the network using stored credentials may attempt access using a random access channel procedure.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may determine a measurement scheme or uplink mode and then transmit an indication of the scheme or uplink mode to an associated user equipment (UE). The base station may identify a set of hidden nodes for the UE and configure the UE for autonomous or grant-based uplink transmissions accordingly. A UE may initiate a channel clearance scheme by transmitting a first channel clearance signal (e.g., a request-to-send message), which may include a UE identifier before transmitting an uplink message in the unlicensed radio frequency spectrum band. In response, the base station may transmit a second channel clearance signal (e.g., a clear-to-send message). In some cases, the second channel clearance signal may include control information or may be transmitted at a power level that is based on a characteristic of the UE.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor for discovery reference signal (DRS) transmissions, physical downlink shared channel (PDSCH) transmissions, or combinations thereof within a DRS transmission window. The UE may attempt to decode DRS or PDSCH transmissions for a subframe based on detection of DRS transmissions, prioritization of DRS transmissions relative to PDSCH transmissions, locations of subframes within a radio frame, overlapping of the DRS transmission window with a paging opportunity, or any combination thereof. In some cases, one or more radio link monitoring (RLM) parameters may be adjusted based on decoding of PDSCH or DRS transmissions.

Abstract: Existing currency validation (CVAL) devices, systems, and methods are too slow, costly, intrusive, and/or bulky to be routinely used in common transaction locations (e.g., at checkout, at an automatic teller machine, etc.). Presented herein are devices, systems, and methods to facilitate optical validation of documents, merchandise, or currency at common transaction locations and to do so in an obtrusive and convenient way. More specifically, the present invention embraces a validation device that may be used alone or integrated within a larger system (e.g., point of sale system, kiosk, etc.). The present invention also embraces methods for currency validation using the validation device, as well as methods for improving the quality and consistency of data captured by the validation device for validation.

Abstract: Methods, systems, and devices for wireless communication are described. The described techniques provide for transmitting, at a base station, a contention exempt broadcast paging message that includes partial paging information for a user equipment (UE), receiving a random access request message transmitted by a UE in response to the broadcast paging message, and transmitting a unicast paging message which includes complete paging information. The described techniques further provide for determining, at a base station, a first paging opportunity window (POW) and a second POW for a UE, performing a LBT procedure during the first POW, transmitting a broadcast paging message including partial paging information for the UE during the first POW, performing a second LBT procedure during the second POW, transmitting a unicast paging message to the UE during the second POW, the unicast paging message including complete paging information for the UE.

Abstract: Methods, systems, and devices for enhanced neighbor discovery through enhanced automatic neighbor relations (ANR) and for detecting cell identifier confusion and are described. Neighboring base stations may provide information to one another, including using ANR, that may avoid or help to resolve cell identity confusion. For example, a NHN-ID may be defined to avoid or resolve cell identify confusion. A wireless device, such as a base station or a user equipment (UE), may determine whether neighboring cells are using a common cell identifier and may adjust operations accordingly. For example, a device may detect physical cell identity (PCI) confusion by determining whether two neighboring cells have the same PCI and different Evolved Universal Terrestrial Access Network (E-UTRAN) Cell Global Identifiers (ECGIs) or different Neutral Host Network Identifier (NHN-IDs). A network entity may then inform the neighboring cells having the same PCI of the confusion.

Abstract: Techniques for reservation coordination on a shared communication medium are disclosed. An access point, for example, may contend for access to a communication medium, and transmit a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the communication medium for a transmission opportunity (TXOP) duration based on the contending. The access point may then transmit, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit a control message during a special subframe of a radio frame. The UE may determine a payload size of the control message according to a radio resource configuration, or the UE may determine a payload size based on a number of bits associated with information to be sent in the control message. The UE may identify uplink resources of the special subframe to use for the control message based on explicit signaling or implicitly based on information to be sent in the control message. Designated resources for control message transmissions in a special subframe may remain the same or may change in subsequent transmission opportunities. The UE may determine to use the same or different resources of a special subframe in a subsequent transmission opportunity depending on when the UE receives downlink messages.

Abstract: Methods, systems, and devices for wireless communication are described. Resources for narrowband communication in an unlicensed radio frequency spectrum band may be configured and allocated based on resource availability, regulatory constraints, and device capability or category. A narrowband wireless device, such as a machine type communication device or other relatively low complexity device, may communicate using one or more narrowband carriers, which may occupy between one tone and multiple resource blocks in an unlicensed spectrum band (e.g., any number of resources between one (1) tone and multiple resource blocks (RBs)). Different device types may thus be configured differently as they move between geographic regions. The base station may then communicate with the narrowband mobile device based on the resource allocation and the carrier configuration.

Abstract: Methods, systems, and devices for wireless communication are described. Wireless communications systems operating in unlicensed or shared radio frequency spectrum band may use different modes to manage hybrid automatic repeat request (HARQ) feedback. HARQ feedback may be transmitted autonomously or, in some cases, HARQ feedback may be solicited from a user equipment (UE) for one or several HARQ processes. Solicited feedback may be referred to as polled feedback and autonomous feedback may be referred to as unpolled feedback. Polled and unpolled feedback may be transmitted using different physical channels, and may be grant-based or triggered without an express grant. Buffers for polled and unpolled feedback may be separately maintained and managed. In a multicarrier configuration, uplink control information (UCI) for one or more carriers may be transmitted on a subset of configured uplink carriers. A number of carriers used for UCI may depend on operating conditions of a UE.

Abstract: A genetic surveillance system comprises a communications network and at least one reader-analyzer instrument. The reader-analyzer instrument has a communication interface to communicate over the network. The reader-analyzer instrument is adapted to perform genetic assay analysis of a sample obtained from a member of a population and to generate detection-related data based upon the analysis. The reader-analyzer instrument is adapted to associate qualifying information with the detection-related data and to communicate the associated qualifying information and detection-related data over the network.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor a neighbor cell and report the result to a serving base station. Based on the report, the serving base station may identify an estimated discovery reference signal (DRS) transmission window of the neighbor cell. In some cases, the UE may estimate and report parameters of the neighbor DRS transmission window, and in other cases, the UE may make a measurement report and the base station may infer DRS transmission window parameters. The base station may then provide the UE with a DRS measurement timing configuration (DMTC) based on the estimated parameters of the neighbor cell so that the UE may monitor the neighbor cell and the serving cell in an efficient manner. For example, the UE may conserve battery life by refraining from monitoring DRS during periods when a DRS transmission is not likely.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for wireless communication are provided. The apparatus may be a base station. The apparatus may transmit an uplink grant to a UE during a first transmit opportunity. The apparatus may signal, during a second transmit opportunity, a grant trigger to the UE to trigger operations associated with the uplink grant that are uncompleted after the first transmit opportunity. The grant trigger may be associated with a set of UEs that includes the UE. The set of UEs may be a subset of the UEs having pending transmissions. The apparatus may instruct the UE regarding whether to keep or discard resources granted by the uplink grant when the UE switches to a different beam during or prior to the second transmit opportunity.

Abstract: Techniques are described for wireless communication. A method for wireless communication at a user equipment (UE) includes receiving an instance of a discovery reference signal (DRS) on a beam over a shared radio frequency spectrum band; determining a public land mobile network identifier (PLMN ID) based at least in part on a time-frequency location of the instance of the DRS; and selectively performing a random access procedure based at least in part on the determined PLMN ID. A method for wireless communication at a base station includes transmitting an instance of a DRS on a beam over a shared radio frequency spectrum band; and transmitting a PLMN ID based at least in part on a time-frequency location of the DRS.

Abstract: Methods, systems, and devices for wireless communication are described. The described techniques provide for transmitting, at a base station, a contention exempt broadcast paging message that includes partial paging information for a user equipment (UE), receiving a random access request message transmitted by a UE in response to the broadcast paging message, and transmitting a unicast paging message which includes complete paging information. The described techniques further provide for determining, at a base station, a first paging opportunity window (POW) and a second POW for a UE, performing a LBT procedure during the first POW, transmitting a broadcast paging message including partial paging information for the UE during the first POW, performing a second LBT procedure during the second POW, transmitting a unicast paging message to the UE during the second POW, the unicast paging message including complete paging information for the UE.

Abstract: Methods, systems, and devices for wireless communications are described. The method may include determining multiple transmission beams (e.g., beamformed directional beams) for transmission of an opportunistic or multi-beam discovery reference signal (DRS) over a shared radio frequency spectrum band. A base station may perform a listen before talk (LBT) procedure for the multiple DRS transmission beams, and transmit, based on the LBT procedure, the DRS over the shared radio frequency spectrum band using a set of the multiple transmission beams (e.g., a set that cleared an LBT procedure). In some cases, the LBT may be performed for each transmission beam, or for a union of all transmission beams, associated with the DRS transmission beams. Alternatively, the base station may determine a contention exempt transmission (CET) period for the shared spectrum band and transmit the DRS using the multiple transmission beams during CET period.

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: The present disclosure relates to trial scleral lenses, and the resulting scleral lenses, designed for the asymmetric shape of the sclera and/or its chiral properties. In some embodiments, the scleral lenses are also designed for the specific asymmetry associated with different scleral diameters. In addition, as discussed herein, the scleral shape can vary with different conditions of the eye. By designing a set of trial scleral lenses that takes into account these different asymmetric properties of the sclera, a clinician can be more efficient, fitting more eyes with fewer subsequent modifications. The resulting lenses will also achieve a better fit.