Rahul Malik

US Patent:

20180011179, Jan 11, 2018

Filed:

Jul 6, 2017

Appl. No.:

15/643188

Inventors:

- San Diego CA, US
Ning Zhang - Saratoga CA, US
Youhan Kim - San Jose CA, US
Rahul Malik - San Diego CA, US
James Cho - Mountain View CA, US

International Classification:

G01S 11/02
H04L 29/06
H04B 7/06
H04W 84/12

Abstract:

This disclosure provides systems, methods and apparatuses for detecting a presence of long training fields (LTFs) in packet extensions of high-efficiency (HE) packets. An apparatus requests a length of packet extensions to be used for a ranging operation. The apparatus receives an HE packet including a packet extension containing a selected number of LTFs based at least in part on the requested packet extension length. The apparatus performs the ranging operation based on a determination that the packet extension contains LTFs. In some aspects, the apparatus detects a presence of LTFs in the packet extension based on a bit provided in the HE packet. In some other aspects, the apparatus detects a presence of LTFs in the packet extension by extracting sequences from the packet extension.

US Patent:

20170250831, Aug 31, 2017

Filed:

Jun 23, 2016

Appl. No.:

15/191493

Inventors:

- San Diego CA, US
Jeff Smith - San Jose CA, US
Xiaoxin Zhang - Fremont CA, US
Chia-Hui Lin - San Jose CA, US
Yen-Feng Lee - San Jose CA, US
Ravi Gidvani - Fremont CA, US
Alecsander Eitan - Haifa, IL
Rahul Malik - San Diego CA, US

International Classification:

H04L 12/18
H04W 24/10
H04L 12/841

Abstract:

Disclosed embodiments facilitate wireless channel calibration, including ranging and direction finding, between wirelessly networked devices. In some embodiments. a method on a first station (STA) may comprise: transmitting a first NDPA frame to one or more second stations (STAs), the first NDPA frame comprising a first bit indicating that one or more subsequent frames comprise ranging or angular information; and transmitting, after a Short Interval Frame Space (SIFS) time interval, a second frame. The second frame may be one of: a Null Data Packet az (NDP_az) frame with information about a time of transmission of the NDP_az frame, or a Null Data Packet (NDP) frame, or a Beam Refinement Protocol (BRP) frame. The first NDPA frame may be unicast, multicast, or broadcast.

US Patent:

20170251332, Aug 31, 2017

Filed:

Jun 23, 2016

Appl. No.:

15/191498

Inventors:

- San Diego CA, US
Jeff Smith - San Jose CA, US
Xiaoxin Zhang - Fremont CA, US
Chia-Hui Lin - San Jose CA, US
Yen-Feng Lee - San Jose CA, US
Ravi Gidvani - Fremont CA, US
Alecsander Eitan - Haifa, IL
Rahul Malik - San Diego CA, US

International Classification:

H04W 4/02
G01S 5/00
G01S 5/02

Abstract:

Disclosed embodiments facilitate wireless channel calibration, ranging, and direction finding, between networked devices. A method on a first station (STA) may comprise: broadcasting, at a first time, a first NDPA frame to a plurality of second STAs. The first NDPA frame may include a first bit indicating that one or more subsequent frames comprise ranging or angular information. After a Short Interval Frame Space (SIFS) time interval from the first time, a second frame may be broadcast. The second frame may be a Null Data Packet (NDP) frame. In response, a plurality of Compressed Beamforming (CBF) frames may be received at the first STA where each CBF frame may be received from a distinct corresponding second STA, and may include Channel Feedback Information field with information pertaining to communication channel between the first STA and the corresponding second STA. The communications may be encoded using Orthogonal Frequency Division Multiple Access.

US Patent:

20160295580, Oct 6, 2016

Filed:

Apr 3, 2015

Appl. No.:

14/678652

Inventors:

- San Diego CA, US
James Simon Cho - Mountain View CA, US
Guido Frederiks - Aptos CA, US
Qinghai Gao - Sunnyvale CA, US
Xiaolong Huang - San Jose CA, US
Chao Zou - Ocala FL, US
Rahul Malik - San Diego CA, US

International Classification:

H04W 72/04
H04W 52/02
H04W 24/08

Abstract:

Methods, systems, and devices are described for wireless communication at a wireless device. A wireless device (e.g., station or access point) may adapt short inter-frame space (SIFS) burst parameters to improve the performance of the overall network while providing enriched user experience. A wireless device may monitor traffic conditions on the network and dynamically adapt the SIFS burst parameters associated with one or more stations based at least in part on detected variations on the traffic channel. In other examples, the wireless device may allocate a common SIFS burst parameter to be used by a plurality of wireless devices in the basic service set (BSS).