Qualcomm Incorporated

Cisco Technology, Inc.

Leland Stanford Junior University

Other

Cisco Systems Inc.

Airgo Networks, Inc.

Vincent Knowles Jones, Iv

Hemanth Sampath

Didier Johannes Richard Van Nee

Sameer Vermani

Gregory G Raleigh

James M Gardner

Maarten Menzo Wentink

Santosh Paul Abraham

Michael A Pollack

Simone Merlin

Albert Van Zelst

Bin Tian

Lin Yang

Geert Arnout Awater

Youhan Kim

D J Richard Van Nee

Ali Raissinia

Jialing Li Chen

Rahul Tandra

Derek Gerlach

Gwendolyn Denise Barriac

Yan Zhou

Stephen Jay Shellhammer

Vinay Sridhara

Mohammad Hossein Taghavi Nasrabadi

Alireza Raissinia

Ning Zhang

Gregory C Steele

Srinivas Katar

Louay A Jalloul

Arogyaswami J Paulraj

Sandip HomChaudhuri

James Simon Cho

Guido Robert Frederiks

Alok Aggarwal

Qinghai Gao

Ahmad Abdulrahman Mohammed

Suhas Nagraj Diggavi

George Cherian

Abhishek Pramod Patil

Xiaolong Huang

Partho Pratim Mishra

Jouni Kalevi Malinen

Tevfik Yucek

Ahmed Ragab Elsherif

Rolf De Vegt

Tao-Fei Samuel Ng

Michael Richard Green

Todd Daniel Antes

Chi-Lin Su

MeeLan Lee

Brian L Wong

Simon Jan Brand

Patrick Kelliher

Santosh Anikhindi

Junyi Li

Alfred Asterjadhi

Sanjiv Nanda

Avneesh Agrawal

Brian Clarke Banister

Carlos Horacio Aldana

Xiaoxin Zhang

Ashish Kumar Shukla

Jong Hyeon Park

Je Woo Kim

Krishnan Rajamani

Bretton Lee Douglas

Amin Jafarian

Olaf Josef Hirsch

David J Pignatelli

Le Nguyen Luong

Zhi Quan

Ehab Tahir

Srinivas Kandala

Sanaz Barghi

Matthias Brehler

Koorosh Akhavan

Raja Banerjea

Doo Seok Kim

Gregory Alan Breit

Allert Van Zelst

Sumeet Kumar

Nathaniel David Houghton

Jonathan S Leary

Pooria Pakrooh

Kapil Rai

Rahul Jammula

Rahul Dangui

Tracy Hall

Gregory Taylor

Jayanand Asok Kumar

Adrian Harold Chadd

Prasanna K Basaralu Subramanya

Jian Tao

Pavankumar Veerashetty

Alireza Kheirkhahi

Mani Bharathi Pandian

Ramaprasad Samudrala

Didier J Richard Van Nee

This disclosure provides systems, methods, and apparatuses for wireless communication. An example apparatus selects a resource unit (RU) for a physical (PHY) layer convergence protocol (PLCP) protocol data unit (PPDU). The selected RU includes a set of contiguous tones spanning a bandwidth. The apparatus maps the set of contiguous tones to a set of non-contiguous tones distributed across the frequency spectrum, and transmits the PPDU over the set of non-contiguous tones. Another example apparatus selects an RU of a group of RUs that collectively span a frequency spectrum, and formats a PPDU based on a first frequency bandwidth wider than the selected RU's bandwidth. The apparatus parses the contiguous tones of the selected RU to a set of non-contiguous tones spanning a unique segment of a second frequency bandwidth wider than the first frequency bandwidth, and schedules a transmission of the PPDU over the set of non-contiguous tones.

Distributed tone mapping for power spectral density (PSD) limits

This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for providing uplink broadcast service connectivity via a wireless local area network (WLAN). In some implementations, a wireless device may transmit an uplink communication to an access point (AP) that supports uplink broadcast services, and the AP may forward the uplink communication to a remote destination indicated in the uplink communication. In some implementations, the wireless device may be in an unassociated state and may transmit the uplink communication without establishing a formal wireless session with the AP. The uplink communication may include a request for the AP to embed AP-provided data to the uplink communication before forwarding it the remote destination. This disclosure includes techniques to prevent flooding and unauthorized uplink communications being used for a denial of service attack on the remote destination.

Uplink broadcast service in a wireless local area network (WLAN)

Techniques are provided for radio frequency (RF) sensing using a single wireless device. An example method for determining a distance to an object with radio frequency sensing includes transmitting a radio frequency signal with a transmit channel on a wireless device, receiving a leakage signal with a receive channel on the wireless device at a first time, such that the leakage signal is based on the radio frequency signal, receiving a reflected signal with the receive channel on the wireless device at a second time, such that the reflected signal is based on the radio frequency signal reflecting from the object, and determining the distance to the object based at least in part on a difference between the first time and the second time.

Radio frequency sensing using a single device based on concurrent transmit and receive

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless device may perform a listen-before-talk (LBT) procedure for a narrowband communication that provides time and frequency synchronization and/or scheduling information for an ultra-wideband (UWB) communication. The wireless device may transmit the narrowband communication in response to the LBT procedure being successful. The wireless device may transmit the UWB communication based at least in part on the time and frequency synchronization and/or scheduling information. Numerous other aspects are described.

Narrowband communication for ultra-wideband communication

This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for including signaling regarding enhanced features of new wireless communication protocols. The signaling may be included in various portions of a physical layer preamble of a wireless transmission. In some implementations, the physical layer preamble may be used to indicate puncturing of subbands or content channels that may carry further signaling in accordance with preamble signaling designs of this disclosure. The physical layer preamble signaling be parallelized for different subchannels of a wireless channel that consists of multiple subchannels. Some implementations of the physical layer preambles may be used to multiplex different types of wireless local area network communications into different subsets of the plurality of subchannels of the wireless channel.

Physical layer preamble and signaling for wireless communication

The present disclosure provides techniques for rate adaptation under congestion and latency constraints. The approaches described herein focus on aspects of latency, reliability, and power consumption instead of the traditional aspect of throughput. In an example, a method for rate adaptation is disclosed. The method may include determining whether to transmit a new packet or a retry packet. The method may also include reducing a maximum rate for a rate search in response to determining to transmit the retry packet. The method may further include transmitting the retry packet based on the reduced maximum rate.

Techniques for rate adaptation under congestion and latency constraints

Methods, systems, and devices for wireless communication are described. In some systems (e.g., Wi-Fi systems), a transmitting device such as an access point (AP) or mobile station (STA), may identify a number of spatial streams for a data transmission that is less than a number of transmit antennas, and may transmit a packet over a channel. In a first implementation, the packet may be formatted in a multi-user frame format, with a number of long training field (LTF) symbols equal to the number of transmit antennas. In a second implementation, the packet may be a null data packet (NDP), and the device may transmit a separate data packet. In a third implementation, the packet may be formatted in single-user frame format with a modified LTF. A receiving device may receive the packet, and may perform channel estimation and power amplifier (PA) distortion cancellation based on the received packet.

Transmitter schemes to facilitate side channel information estimation

This disclosure provides methods, devices and systems for acknowledgement and retransmission, and more specifically, to methods, devices and systems that enable a secondary wireless channel to provide acknowledgements of data transmitted on a primary wireless channel concurrently with the reception of additional data on the primary wireless channel. In some implementations, a transmitting device may transmit wireless packets including multiple codewords to a receiving device via a first wireless channel. The receiving device may attempt to decode the received codewords based on primary information in the codewords. The receiving device may then transmit to the transmitting device, via a second wireless channel, a codeword acknowledgement that identifies codewords that the receiving device did not successfully decode. The transmitting device may then transmit parity information to the receiving device via the first wireless channel that aids the receiving device in decoding the identified codewords.

Acknowledgement and retransmission techniques utilizing secondary wireless channel

This disclosure provides systems, methods and apparatuses for wireless communications. In some implementations, a first wireless communication device associated with a basic service set (BSS) receives a plurality of packets transmitted during a measurement window by a second wireless communication device associated with the BSS. The first wireless communication device determines a received signal strength indicator (RSSI) value of the plurality of received packets, determines a level of overlapping basic service set (OBSS) interference on the wireless medium during the measurement window, and adjusts one or more of a packet detect (PD) threshold, an OBSS PD threshold, or an energy detect (ED) threshold based on the determined RSSI value and the level of OBSS interference.

Adaptive detection threshold for contention-based channel access

This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a hybrid automatic repeat request (HARQ) protocol in a wireless local area network (WLAN). A first WLAN device may generate a first HARQ packet for transmission to a second WLAN device. The first WLAN device may determine a first basic service set (BSS) indicator and a second BSS indicator for a BSS associated with the first WLAN device and the second WLAN device. The first BSS indicator and the second BSS indicator may be indicative of a BSS identifier (BSSID) of the BSS. The first WLAN device may output the first HARQ packet for transmission to the second WLAN device. The first HARQ packet may include the first BSS indicator and the second BSS indicator in one or more fields of a physical layer (PHY) header of the first HARQ packet.

Hybrid automatic repeat request (HARQ) with basic service set (BSS) and station identification

Growing community of inventors

Redwood City, CA, United States of America

Vincent Knowles Jones, Iv