Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.

Abstract: Methods, systems, and devices for wireless communication are described. A receiving device may detect a signal associated with low latency transmissions and decode a non-low latency communication accordingly. The receiving device may receive an indicator from a transmitting device that indicates where and when low latency communications occur. The indication may specify frequency resources or symbols used by the low latency communication. The indicator may be transmitted during the same subframe as the low latency communication, at the end of a subframe, or during a subsequent subframe. The receiving device may use the indicator to mitigate low latency interference, generate channel estimates, and reliably decode the non-low latency communication. In some cases, the interfering low latency communication may occur within the serving cell of the receiving device; or the interfering low latency communication may occur in a neighboring cell.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station may use low latency communications to improve the throughput of a wireless link. To facilitate efficient low latency communication, the UE may send UE-initiated CSI reports in addition to periodic and base station-initiated reports. For example, the UE may, in various examples, send UE-initiated CSI reports using contention based spectrum, using a request-to-transmit, or using a CSI differential (i.e., an indicator of a change in channel conditions). The base station may schedule different UEs for uplink low latency communication by providing resources to each UE for CSI and scheduling requests (SRs) using coherent or non-coherent uplink transmissions. The CSI and SR may also be combined with uplink feedback.

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device such as a user equipment (UE) or a base station may identify a set of resource element groups (REGs) for low latency communication, and each REG may include a portion of a different resource block (RB) of a set of RBs (e.g., a set of non-contiguous RBs). The device may then map an uplink control channel to the selected REGs and communicate on the uplink control channel accordingly. Reference signals may also be transmitted in the same RBs, and the REGs may be mapped around the resources used for reference signals. In some cases, multiple UEs may transmit uplink control data using the same resources using code division multiplexing (CDM) (e.g., if the control payload is relatively small). In other cases, multiple UEs may be frequency division multiplexed (FDM).

Abstract: Techniques are described for wireless communication. One method includes winning a contention for access to an unlicensed radio frequency spectrum band, transmitting a request message upon winning the contention for access to the unlicensed radio frequency spectrum band, and receiving a response message over the unlicensed radio frequency spectrum band. The request message is transmitted by a user equipment (UE) on an enhanced physical random access channel (ePRACH) or shortened ePRACH (SePRACH), to access a cell that operates in the unlicensed radio frequency spectrum band. The response message is received in response to transmitting the request message, and the request message may be transmitted irrespective of whether a base station has gained access to the unlicensed radio frequency spectrum band.

Abstract: The present disclosure provides a conductive terminal and an electrical connector assembly. A high power electrical connector is provided for transmitting electrical signals from a pair of cables, such as high current capable cables, to an associated member, such as a dash panel. The high power electrical connector includes an insulative housing and a pair of contact path assemblies therethrough for transmission of the electrical signals. The cables include a shield layer that is biased to the backshell providing a ground path for the cables and connector.

Abstract: Certain aspects relate to methods and apparatus for latency reduction for UEs in a RRC connected mode. During contention-based uplink access by groups of UEs within a subframe, an eNB may decode the received uplink transmission based, at least in part, on the assigned group of resources assigned to the UE and used for transmission. Additional orthogonalization techniques such as reduced TTI size can be used to reduce collisions among different users performing contention-based transmissions. Furthermore, when the eNB fails to successfully decode the uplink transmission, the eNB may identify the UE that sent the uplink transmission based on a detected reference signal and may transmit an uplink assignment to the identified UE.

Abstract: Techniques for handling Channel State Information (CSI) for ultra low latency (ULL) in Long Term Evolution (LTE) devices are presented. For example, an example method of reporting CSI to a network entity is presented. Such an example method may include detecting a CSI reporting trigger for reporting CSI to the network entity and identifying, based on detection of the CSI reporting trigger, a subframe region for which the CSI is to be generated. In an aspect, the subframe region is included in a plurality of subframe regions, where each subframe region of the plurality of subframe regions includes at least one symbol of a subframe. In an additional aspect, the example method may include generating the CSI based on the subframe region and transmitting the CSI to the network entity.

Abstract: Various aspects described herein are related to communicating feedback communications received over multiple component carriers (CCs) in wireless communications. The communications can be received from a serving node over the multiple CCs configured in carrier aggregation or multiple connectivity. One or more of the multiple CCs can be determined for transmitting feedback regarding the communications received over at least one CC of the multiple CCs, wherein the one or more of the multiple CCs are selected for transmitting the feedback based at least in part on a transmission time interval (TTI) duration for the at least one CC. Feedback related to receiving the communications from the serving node over the at least one CC can be transmitted over the one or more of the multiple CCs.

Abstract: Certain aspects of the present disclosure generally relate to techniques for selecting a base graph to be used for wireless communications. Selection can be based on a variety of factors. Abase graph can be used to derive a low-density parity-check (LDPC) code used for encoding a retransmission of an original transmission. An exemplary method generally includes selecting, based on a modulation and coding scheme (MCS) and a resource allocation (RA) for transmitting a codeword, a base graph (BG), from which to derive a low density parity check (LDPC) code for use in encoding data bits in the codeword (e.g., encoding data bits of a bitstream such that some redundant bits are included in the codeword), encoding the data bits to generate the codeword using the LDPC code derived from the selected BG, and transmitting the codeword using the MCS via resources of the RA.

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device configured for carrier aggregation may communicate using transport blocks (TBs) mapped according to a wideband configuration that includes resources of multiple component carriers (CCs) within a single, low latency transmission time interval (TTI)—e.g., a TTI that has a shorter duration relative to other TTIs used in the same system. The number of CCs, and thus bandwidth, available for mapping each TB may change dynamically based on the configuration of the CCs. For a CC configured with a control region during a given low latency TTI, a TB sent during that low latency TTI may not be mapped to resources of that CC. In other cases, portions of a CC configured with a control region may be used for wideband configurations. Wideband low latency communications may be used on the uplink or downlink communications, or both.

Abstract: Communications data having a reliability and latency threshold may be transmitted within a legacy downlink control channel. For example, a user equipment (UE) may utilize low latency services, such as ultra-reliable low latency communications (URLLC). In such cases, a base station may transmit URLLC data in a legacy physical downlink control channel (PDCCH) of a downlink transmission time interval. The UE may determine that the PDCCH includes downlink data. The downlink data may have a delay tolerance below the threshold level (e.g., URLLC data), and the determination may be based on a downlink control information (DCI) payload within the received PDCCH. The UE may then receive the downlink data within the PDCCH. In some examples, the downlink data may be received within the DCI payload. Additionally or alternatively, the DCI payload may provide an indication of resources within the PDCCH that are utilized for carrying the downlink data.

Abstract: Methods and apparatus are provided for shortened Transmission Time Interval (sTTI) configurations for low latency communications. A User Equipment (UE) receives at least one transmission in a first TTI of a first duration configured for the UE, the first TTI assigned within a second TTI of a second duration, wherein the first TTI is configured for Ultra-Reliable and Low-Latency Communications (URLLC) and uses, at least in part, a configuration for communicating using the second TTI.

Abstract: Various aspects are described relating to wireless communications of a second type of traffic data for small data transmissions. A first indication of control channel resources can be received from a network entity, wherein the control channel resources are defined by a radio access technology to include control data associated with a first type of traffic data. A control channel can be received from the network entity over the control channel resources, wherein the control channel includes a second type of traffic data, wherein the second type of traffic data includes a comparatively smaller data payload than the first type of traffic data. The second type of traffic data can be decoded from the control channel without decoding control data from the control channel.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.

Abstract: Methods, systems, and devices for wireless communication are described that provide scheduling request (SR) resources that may be used by a user equipment (UE) to request uplink resources. SR resources may be allocated within random access channel resources, and a UE may use the SR resources to transmit a SR. The random access resources may be allocated in a first duration transmission time interval (TTI) that has a duration that is shorter than a second duration TTI. The SR resources may be a subset of random access preambles associated with the random access resources.

Abstract: Methods, systems, and devices for wireless communication are described that provide allocation of wireless resources for UEs in carrier aggregation resource groups that span two or more component carriers (CCs). A carrier aggregation resource group may include a portion of available wireless resources in two or more CCs, and multiple carrier aggregation resource groups may be configured that may include resources that span overlapping or non-overlapping CCs. Downlink control information may be transmitted using a downlink control region that spans two or more CCs in a carrier aggregation resource group. A UE may be configured to monitor multiple CCs for downlink control information, such as through blind decodes of each CC that may contain downlink control information.

Abstract: Certain aspects relate to methods and apparatus for latency reduction for UEs in a RRC connected mode. During contention-based uplink access by groups of UEs within a subframe, an eNB may decode the received uplink transmission based, at least in part, on the assigned group of resources assigned to the UE and used for transmission. Additional orthogonalization techniques such as reduced TTI size can be used to reduce collisions among different users performing contention-based transmissions. Furthermore, when the eNB fails to successfully decode the uplink transmission, the eNB may identify the UE that sent the uplink transmission based on a detected reference signal and may transmit an uplink assignment to the identified UE.

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device such as a user equipment (UE) or a base station may identify a set of resource element groups (REGs) for low latency communication, and each REG may include a portion of a different resource block (RB) of a set of RBs (e.g., a set of non-contiguous RBs). The device may then map an uplink control channel to the selected REGs and communicate on the uplink control channel accordingly. Reference signals may also be transmitted in the same RBs, and the REGs may be mapped around the resources used for reference signals. In some cases, multiple UEs may transmit uplink control data using the same resources using code division multiplexing (CDM) (e.g., if the control payload is relatively small). In other cases, multiple UEs may be frequency division multiplexed (FDM).

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit an indication of first and second configurations for sounding reference signal (SRS) transmissions during first and second transmission time intervals (TTIs) having different durations. A user equipment (UE) may identify an SRS to be transmitted and determine a configuration for the SRS transmission based on the TTI duration and the received indication of the first and second configurations. The UE may then transmit the SRS based on the configuration. A base station may receive an SRS during a TTI and may determine a channel quality based at least in part on the SRS. Additionally, a device may identify data to transmit during a TTI, determine a number of resource elements available for transmission of the data during a TTI, and determine a transport block size (TBS) for the data transmission based on the available resource elements.