Abstract: Methods, systems, and devices are described for increased wireless communications system capacity through hierarchical modulation of multiple transmission layers during certain transmission subframes in a wireless communications system. Various deployment scenarios may be supported that may provide communications modulated on both a base modulation layer as well as on an enhancement modulation layer that is superpositioned on the base modulation layer. Reference signals may be provided for channel estimation for both the base modulation layer and enhancement modulation layer.

Abstract: Multiple full channel quality indication (CQI) reports indicative of received signal quality for multiple carriers in wireless communication are transmitted in multiple time intervals of a CQI channel.

Abstract: Techniques are described for wireless communication. A first method includes identifying a configuration of a downlink subframe in a shared radio frequency spectrum band, and generating, based at least in part on the configuration of the downlink subframe, a cell-specific reference signal (CRS) for the downlink subframe. A second method includes dynamically determining a presence of a CRS in a downlink subframe in a shared radio frequency spectrum band, and performing at least one operation during the downlink subframe in response to the dynamic determination.

Abstract: A method, an apparatus, and a computer-readable medium for delivering content to end user via shared broadcast are provided. The apparatus may be a UE that determines to acquire a MBMS service. The UE tunes to a frequency provided by a first MNO to which the UE is not a subscriber in order to receive the MBMS service via a carrier shared by the first MNO and at least one other MNO. The UE receives the MBMS service on the frequency via the carrier shared by the first MNO and the at least one other MNO. The shared carrier may have a common SFN timing with respect to the first MNO and the at least one other MNO. The shared carrier may include a shared MBMS SDL carrier. The shared carrier may include a standalone shared carrier for receiving the MBMS service and control information associated with the MBMS service.

Abstract: The disclosure provides for control plane measurements in a wireless device. The wireless device may measure, across multiple sub-frames received over an unlicensed spectrum, received cell-specific reference signals (CRS) from a cell to obtain CRS measurements. The wireless device may identify one or both of a first subset of the CRS measurements associated with a first subset of the sub-frames including opportunistic transmissions and a second subset of the CRS measurements associated with a second subset of the sub-frames including guaranteed transmissions. The wireless device may compute one or both of a first signal to interference plus noise ratio (SINR) value for the first subset of the CRS measurements and a second SINR value for the second subset of the CRS measurements. The wireless device may monitor a radio link condition of the wireless device based at least in part on the first SINR value or the second SINR value.

Abstract: Certain aspects of the present disclosure provide techniques that may be used to help enable low latency communications between a user equipment (UE) and a base station (BS) using quick uplink channels that enable a reduced transmission time interval (TTI). Additionally, certain aspects of the present disclosure provide techniques for managing communications in a wireless communication system, for example, by using enhanced downlink control channels.

Abstract: Suppression of serving cell transmissions directed to second-served UEs may improve channel estimation of a serving cell or a neighbor cell. This may include using scheduling information for second-served UEs to suppress serving cell signals intended for second-served UEs having overlapping MIMO transmissions. Alternatively, this scheduling information may aid in suppressing a serving cell signal for a second-served UE to improve channel estimation of a neighbor cell. Various embodiments described herein, include implementations and techniques to aid channel estimation, and signal scheduling information to a first-served UE to aid in suppression of serving cell signals for second-served UEs.

Abstract: Techniques for transmitting and receiving wireless communications over an unlicensed radio frequency spectrum band are disclosed, including techniques for transmitting and receiving system information blocks over the unlicensed radio frequency spectrum band, techniques for gaining access to the unlicensed radio frequency spectrum band by performing extended clear channel assessments (ECCAs), techniques for transmitting and receiving synchronization signals and reference signals over the unlicensed radio frequency spectrum band, techniques for identifying starting times of downlink transmissions over the unlicensed radio frequency spectrum band, techniques for transmitting and receiving clear channel assessment (CCA)-exempt transmissions over the unlicensed radio frequency spectrum band, techniques for performing random access over the unlicensed radio frequency spectrum band, and techniques for dynamically modifying a transmission mode over the unlicensed radio frequency spectrum band.

Abstract: Techniques are described for wireless communication. A method for wireless communication includes identifying a frame structure for transmissions using an unlicensed radio frequency spectrum band, the frame structure including at least two special subframes; and performing a procedure to gain access to the unlicensed radio frequency spectrum band during at least a portion of at least one of the at least two special subframes.

Abstract: The disclosure relates to drone user equipment (UE) indications that may be conveyed to a wireless network. In particular, a UE that has flight capabilities (i.e., capabilities to operate as an unmanned aircraft system) and optional further capabilities to report a current height level may indicate such capabilities to the wireless network. As such, the wireless network may differentiate the drone UE from other UEs that only operate on the ground. Furthermore, the optional current height level may enable the wireless network to differentiate among drone UEs operating at different heights and/or from other UEs that are operating on the ground. The wireless network may further use the information indicating the flight capabilities either alone or in combination with the optional height information to configure power control parameters, manage interference, provide mobility management functions, generate neighbor lists, control beamforming, or implement a radio resource configuration or management procedure.

Abstract: Certain aspects of the present disclosure generally relate to wireless communications, and more specifically to reference signal design for communications with coverage enhancements and devices with limited communications resources, such as machine type communication (MTC) devices, enhanced or evolved MTC (eMTC) devices, and internet of things (IoT) devices. An example method generally includes determining a set of additional reference signals to transmit in a bundled transmission, based on a bundle length of the bundled transmission, and transmitting the bundled transmission, reference signals, and the additional reference signals, based on the determination.

Abstract: Techniques are described for wireless communication. A first method includes generating uplink control information at a wireless device, and transmitting the uplink control information over an interlace of a component carrier of an unlicensed radio frequency spectrum band. The interlace includes a plurality of non-contiguous concurrent resource blocks in the unlicensed radio frequency spectrum band, and at least two resource blocks in the interlace include different portions of the uplink control information. A second method includes generating uplink control information at a wireless device, and transmitting the uplink control information over an uplink control channel of an unlicensed radio frequency spectrum band. Resources of the uplink control channel are divided into a plurality of discrete dimensions and the uplink control information of the wireless device is transmitted over a number of the discrete dimensions allocated to the uplink control information of the wireless device.

Abstract: A method of wireless communication for an enhanced new carrier type cell includes transmitting downlink common signals and channels at a low duty cycle while in a dormant state. The method also includes transmitting downlink common signals and channels at a high duty cycle while in an active state. Another method of wireless communication includes receiving a trigger; and switching a cell between an active state and a dormant state based on the received trigger.

Abstract: Methods, systems, and devices are described for wireless communication employing two-stage control channel messaging. Systems, methods, and apparatuses for two stage two-stage physical downlink control channel (PDCCH) with a downlink control information (DCI) flag and DCI format size indicator are described. For instance, the present disclosure presents an example method of wireless communication at a wireless device, which may include receiving, at a first bandwidth and during a transmission time interval (TTI), a first control channel message. In addition, the example method may include determining, based on a flag in the first control channel message, whether a second control channel message is present in the TTI. Furthermore, the example method may include receiving, at a second bandwidth, the second control channel message where the flag indicates that the second control channel message is present for the TTI.

Abstract: Certain aspects of the present disclosure generally relate to techniques for connectionless access by a wireless device. Such connectionless access may allow for the transmission of data without the overhead associated with establishing conventional connected access (e.g., radio resource control (RRC) connection) to a network. As a result, a device with relatively little data to transmit, such as a machine type communications (MTC) device, may be able to efficiently exit an idle mode, transmit the data during a connectionless access, and subsequently return to idle mode in a shorter period of time than conventional methods.

Abstract: Techniques are described for wireless communication. A method for wireless communication may include identifying interference at a first node operating in a shared radio frequency spectrum band. The interference may be caused by a second node operating in the shared radio frequency spectrum band. The second node may operate asynchronously to the first node in the shared radio frequency spectrum band. The method may also include adaptively enabling, based at least in part on the identified interference, a synchronization of the first node with at least a third node in the shared radio frequency spectrum band.

Abstract: The disclosure provides for control plane measurements in a wireless device. The wireless device may perform, on signals received over an unlicensed spectrum across multiple sub-frames, radio resource management (RRM) measurements of a cell. The wireless device may identify one or both of a first subset of the RRM measurements associated with a first subset of the sub-frames including opportunistic transmissions and a second subset of the RRM measurements associated with a second subset of the sub-frames including guaranteed transmissions. The wireless device may determine one or more RRM measurement values based on one or both of the first subset of the RRM measurements and the second subset of the RRM measurements. The wireless device may similarly perform radio link management (RLM) measurements and determine RLM measurement values based on the first and second subsets. The wireless device may also use timers for uplink transmissions to detect radio link failures.

Abstract: A first method for wireless communications may comprise determining sizes of payloads of user equipments (UEs), determining whether to multiplex the payloads of the UEs based on the sizes of the payloads, and allocating codes or cyclic shifts to the UEs to transmit the payloads on a single interlace of resources. A second method for wireless communications may comprise determining a first code or a first cyclic shift used for a first transmission using an interlace of resources, and allocating second codes or second cyclic shifts to UEs for a second transmission, where the second transmission may be multiplexed with the first transmission on the interlace of resources. A third method for wireless communications may comprise allocating a first interlace of resources for a first transmission for occupying an unlicensed radio frequency spectrum band, and allocating a second interlace of resources, occupied by a base station, for a second transmission.

Abstract: A device may determine that an unlicensed radio frequency (RF) spectrum band is available for a communication. The device may transmit a first transmission indicator that indicates that the device is transmitting information via the unlicensed RF spectrum band. The first transmission indicator may be associated with a first radio access technology. The device may transmit a second transmission indicator that indicates that the device is transmitting information via the unlicensed RF spectrum band. The second transmission indicator may be associated with a second radio access technology that is different from the first radio access technology.

Abstract: Certain aspects of the present disclosure relate to techniques for configuring an adaptive frame structure for wireless communications systems using unlicensed radio frequency spectrum. A base station (BS) may determine whether another device is transmitting on a channel in the unlicensed radio frequency spectrum or one or more other network conditions pertaining to the channel, determine a frame structure from a plurality of frame structures used for data communications based at least in part on the one or more network conditions, wherein each of the plurality of frame structures has a different frame duration, and communicate with a user equipment (UE) using the determined frame structure. A UE may determine a frame structure from a plurality of frame structures used for data communications, wherein each of the plurality of frame structures has a different frame duration, and communicate with a BS using the determined frame structure.