Abstract: Systems and methods are disclosed for a wireless device to transmit or receive a channel busy time (CBT) to or from other devices in a wireless network. For transmitting, the wireless device may determine a CBT during which a wireless channel is to be occupied, generate a universal reservation signal (URS) indicating the CBT, and transmit on the wireless channel the URS to at least one other wireless device. For receiving, the wireless device may receive on a wireless channel a URS from a second wireless device, the URS configured to indicate the CBT. The wireless device may also refrain from attempting to transmit on the wireless channel during the CBT.

Abstract: Wireless communications systems and methods related to signaling medium reservation information medium sharing among multiple radio technologies (RATs) are provided. A first wireless communication device communicates, with a second wireless communication device, a reservation signal to reserve a transmission opportunity (TXOP) in a spectrum. The spectrum is shared by multiple RATs. The reservation signal includes a plurality of first waveform sequences indicating medium reservation information detectable by the multiple RATs. The first wireless communication device and the second wireless communication device are associated with a first RAT of the multiple RATs. The first wireless communication device communicates, with the second wireless communication device using the first RAT, a communication signal in the spectrum during the TXOP.

Abstract: Systems, methods, and devices for communicating packets having a plurality of types are described herein. In some aspects, the packets include a MAC header with a frame control field. The sub-fields included in a particular frame control field may be based on the type of information to be communicated to the receiving device.

Abstract: Certain aspects of the present disclosure relate to a method for enhanced multi-user multiple input multiple output (MU-MIMO) wireless communications. The proposed method may reduce and/or eliminate stringent frequency and time synchronization requirements for stations (STAs) to participate in a downlink MU-MIMO transaction by utilizing deterministic scheduling.

Abstract: Systems, methods, and devices for wireless communication are provided. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a processor configured to generate a packet for transmission via a wireless signal. The packet is generated for transmission over a bandwidth of 1 MHz using at least one orthogonal frequency-division multiplexing (OFDM) symbol. The apparatus further includes a transmitter configured to transmit the packet via the wireless signal having unique power spectral density characteristics.

Abstract: Techniques are provided for constructing or determining a training sequence as a part of transmission preamble to minimize (or at least reduce) a peak-to-average power ratio (PAPR) at a transmitting node. In one example, a long training field (LTF) sequence of a preamble is determined that combines a set of interpolating sequences with LTF tone values. The LTF tone values may cover at least a portion of bandwidth of a first size, with each of the LTF tone values repeated for different subcarriers. The phases of tones of the LTF sequence may be rotated per bandwidth of the first size and certain tones of the LTF sequence may have a stream of values at pilot locations. For example, the phases of tones of the LTF sequence may be rotated in an effort to reduce PAPR during a transmission of the LTF sequence.

Abstract: A communication device for allocating tones is described that includes a processor and instructions in memory in electronic communication with the processor. The communication device determines whether a bandwidth for signal transmission is 20, 40, 80 or 160 megahertz (MHz). The communication device respectively allocates tones for 20, 40, 80 or 160 MHz as follows: for a very high throughput (VHT) signal A1 (VHT-SIG-A1): 52, 104, 208, 416; a VHT signal A2 (VHT-SIG-A2): 52, 104, 208, 416; a VHT short training field (VHT-STF): 12, 24, 48, 48; one or more VHT long training field(s) (VHT-LTF(s)): 56, 114, 242, 484; a VHT signal B (VHT-SIG-B): 56, 114, 242, 484; and a data field (DATA): 56, 114, 242, 484. The communication device also transmits the signal.

Abstract: Devices and methods for synchronized group messaging in a wireless communication system are described. Multicast transmissions, such as those in a dense network, can cause significant medium usage because same multicast packet is likely sent by multiple APs at different time. Medium usage in such implementations may be redundant. As such, the transmission medium is not used optimally. Devices and methods which coordinate and align group messages (e.g., multicast packets) amongst APs are described. Each AP may be configured to transmit identical packets at the same time. Therefore, medium usage can be reduced, while the range can be extended due to accumulated energy from APs.

Abstract: An acknowledgment (ACK) frame has two parts: a group ACK part and a scheduling information part. In the group ACK part, an ACK/NACK indicator is included for a previous uplink (UL) transmission per station (STA). In the scheduling information part, information included for the following UL transmission per selected STA may comprise, for example, one or more of: a number of selected STAs, a media access control (MAC) address of each selected STA, a data transmission duration per selected STA, a transmission rate per selected STA, a request transmission duration, a pilot transmission order, or a STA transmission order.

Abstract: This disclosure provides systems, methods and apparatuses for pre- and post-packet detection interference nulling. In some implementations, a method includes detecting at least a first part of an unscheduled Wi-Fi packet and performing a channel estimation. The method also may include estimating an interference on the Wi-Fi channel based on a known non-zero portion of the preamble of the Wi-Fi packet and nulling interference from the Wi-Fi channel during reception of at least a second part of the Wi-Fi packet. In some implementations, the method can determine an interference estimate based on at least one of a previously received packet or channel sampling for a Wi-Fi channel and computer a filter based at least in part on the interference estimate. The method also includes applying the filter to a received signal to null interference on the Wi-Fi channel at least before detection of a Wi-Fi packet.

Abstract: Certain aspects of the present disclosure relate to a technique for communicating Channel State Information (CSI) feedback. In some aspects, the CSI feedback is communicated in a very high throughput (VHT) wireless communications system.

Abstract: A communication device for enabling phase tracking is described. The communication device includes a processor and instructions stored in memory. The communication device generates a plurality of pilot symbols. The pilot symbols conform to a rank-deficient pilot mapping matrix. The communication device also transmits the plurality of pilot symbols.

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for operating in a television white space (TVWS) network. One example method generally includes receiving, at an apparatus, a message with a field indicating a current version of an unused frequency spectrum map (e.g., a white space map (WSM)), the unused frequency spectrum map indicating channels usable for wireless communications; determining whether the current version of the unused frequency spectrum map is different than a previous version of the unused frequency spectrum map; and using a channel for wireless communications based on the determination. Another example method generally includes accessing a database of available channels for a current location of an apparatus via a neighboring portable or fixed enabling apparatus and enabling one or more portable dependent apparatuses for the wireless communications via one or more of the available channels.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may comprise an interface configured to communicate data via a first device while an association is maintained with the first device and a processing system configured to perform pre-association operations, via the interface, to initiate association with a second device, while maintaining the association with the first device, and to decide to complete association with the second device and communicate data with the second device, based on a first one or more conditions.

Abstract: A method and apparatus for managing access to a wireless medium by one or more stations (STAs) in a wireless network. A device determines a first transmit opportunity for a first STA of the one or more STAs in the wireless network. The device enables the first STA to access the wireless medium for a duration of the first transmit opportunity by broadcasting a first grant message to the one or more STAs in the wireless network. The first grant message indicates allocation of the first transmit opportunity to the first STA. The device may selectively adjust the duration of the first transmit opportunity based at least in part on one or more properties of the wireless network.

Abstract: Systems and methods of wireless communication are described. One method includes transmitting an indication of a time window for determining a range for wireless communication between a first device and a second device. The method further includes determining the range between the first device and the second device at the indicated time window.

Abstract: A method for wireless communication is provided. The method comprises transmitting a first wireless message comprising a request for a first user terminal to transmit uplink data and an indication of at least one requested operational parameter. The method also comprises receiving a second wireless message from an access point in response to the first wireless message, the second wireless message indicating whether a plurality of user terminals including the first user terminal is selected to transmit uplink data, the second wireless message indicating at least one operational parameter for transmission of uplink data based on the at least one requested operational parameter.

Abstract: This disclosure provides systems, methods and apparatuses for estimating angular information of a received wireless signal. In some implementations, a receiving device may receive a wireless signal from a transmitting device, and estimate channel conditions, based on a number of sounding sequences, to determine a channel frequency response of the received wireless signal. The receiving device may determine a channel impulse response based an inverse discrete Fourier transfer (DFT) function or a partial inverse DFT function of the channel frequency response, and then select a portion of the channel impulse response. The receiving device may estimate an angle of arrival of the received wireless signal based on the selected portion of the channel impulse response.

Abstract: A system and method for wireless devices to efficiently receive communications by transmitting and receiving specialized beacon messages. Particularly, a wireless device may await reception of a synchronizing beacon message from a transmitting device. A relative position identifier within the synchronizing beacon message may then allow the wireless device to anticipate future beacon message transmissions and to synchronize its reception pattern with the transmitter. In this manner the wireless device need only receive and decode beacon messages germane to its operation.

Abstract: Various methods and apparatuses for transmitting an allocation of time in a wireless communication system are disclosed. In one aspect, an allocation of time for receiving communications via a receive beam direction is transmitted. The allocation of time may be based on information regarding an apparatus known to be located in the receive beam direction. A unique time for receiving communications from each known apparatus may be allocated, or a duration of time for receiving communications from the known apparatuses may vary based on a number of apparatuses known to located in a receive beam direction.