Patents by Inventor Hemanth Sampath

Hemanth Sampath has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Extending range and delay spread in WiFi bands
    Patent number: 9451590
    Abstract: Certain aspects of the present disclosure relate to methods and apparatus for extending range and delay spread in 2.4 and 5 GHz bands, and potentially frequency multiplexing users. An apparatus is provided for wireless communications. The apparatus generally includes a processing system configured to generate a packet comprising a first preamble decodable by a first type of device and a second type of device, a second preamble that is decodable by the second type of device, but not the first type of device, and data and a transmitter configured to transmit the packet, wherein the first preamble is transmitted using a first channel bandwidth and the second preamble and data are transmitted using only a portion of the first channel bandwidth.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: September 20, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Hemanth Sampath, Vincent Knowles Jones, IV, Sameer Vermani, Didier Johannes Richard Van Nee, Gwendolyn Denise Barriac
  • Multichannel TDMA mechanism
    Patent number: 9451593
    Abstract: An apparatus and method for communications are disclosed. The apparatus may include a transceiver, and a processing system configured to dynamically allocate a plurality of channels to one or more nodes prior to a data transmission from the transceiver to the one or more nodes. Further, an access terminal and method for communications are disclosed, wherein the access terminal may include a processing system configured to receive from another access terminal a dynamic allocation of a plurality of channels prior to a data transmission, and a transceiver configured to receive the data transmission from the other access terminal on the channels.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: September 20, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Vinay Sridhara, Santosh P. Abraham, Hemanth Sampath
  • Staggered primary channel selection in wifi communication systems
    Patent number: 9445345
    Abstract: Certain aspects of the present disclosure relate generally to wireless communications, and more specifically to systems, methods, and devices for staggered primary channel selection for WiFi. According to certain aspects, a method for wireless communications is provided. The method may be performed, for example, by an access point (AP). The method generally includes obtaining information regarding neighbor basic service sets (BSSs), selecting a primary channel based on the obtained information, and output for transmission a message signaling an intention to communicate using the selected primary channel.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: September 13, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Gwendolyn Denise Barriac, Simone Merlin, Yan Zhou, Hemanth Sampath
  • Physical layer design for uplink (UL) multiuser multiple-input, multiple-output (MU-MIMO) in wireless local area network (WLAN) systems
    Patent number: 9439161
    Abstract: Certain aspects of the present disclosure provide methods and apparatus for uplink (UL) multiuser multiple-input, multiple-output (MU-MIMO) transmissions in a High Efficiency WLAN (HEW) system. One example method generally includes generating a packet having a preamble portion and transmitting the packet. The preamble portion typically includes a long training field (LTF); a first signal (SIG) field subsequent to the LTF; one or more other LTFs located subsequent to the first SIG field; and at least one second SIG field, wherein all SIG fields in the preamble portion, other than the first SIG field, are subsequent to the one or more other LTFs. Another example method generally includes receiving, from an apparatus, a packet having a preamble portion comprising tone-interleaved LTFs; and performing frequency offset adjustment on the packet based on the tone-interleaved LTFs.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: September 6, 2016
    Inventors: Sameer Vermani, Rahul Tandra, Didier Johannes Richard Van Nee, Albert Van Zelst, Hemanth Sampath, Bin Tian
  • Systems and methods of performing link setup and authentication
    Patent number: 9439067
    Abstract: Systems and methods of performing link setup and authentication are disclosed. A first method utilizes an unprotected association request and an association response that includes an access point nonce (ANonce). A second method includes receiving, during a first link setup using a first ANonce, a second ANonce for use in a second link setup. A third method utilizes a temporary key to protect an association request. A fourth method includes generating an ANonce at a mobile device based on an ANonce-seed received from an access point.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: September 6, 2016
    Inventors: George Cherian, Philip Michael Hawkes, Santosh Paul Abraham, Hemanth Sampath
  • METHODS AND APPARATUS FOR SELECTIVE CONTENTION IN A MIXED WIRELESS COMMUNICATION SYSTEM
    Publication number: 20160255653
    Abstract: Certain aspects of the present disclosure relate to a methods and apparatus for wireless communication. In one aspect, a method for communication over a wireless medium includes transmitting, from a first wireless device, a first communication reserving access to the wireless medium during a first time period. The method further includes transmitting a second communication selectively allowing one or more wireless devices to access the wireless medium, regardless of a reservation specified by the first communication, during a second time period. The method further includes transmitting, after the second time period, a third communication reserving access to the wireless medium during a third time period.
    Type: Application
    Filed: February 23, 2016
    Publication date: September 1, 2016
    Inventors: Rahul Malik, Hemanth Sampath, Simone Merlin, Alfred Asterjadhi
  • METHODS AND APPARATUS FOR COMMUNICATING LTE-U NETWORK INFORMATION
    Publication number: 20160255627
    Abstract: Certain aspects of the present disclosure relate to a methods and apparatus for wireless communication. In one aspect, a method of wireless communication comprises transmitting, from a LTE-U device, a first wireless local area network (WLAN) packet that reserves a communication medium over a time period, the WLAN communication including information about a LTE-U communication. The method further comprises transmitting the LTE-U communication during the reserved time period.
    Type: Application
    Filed: February 23, 2016
    Publication date: September 1, 2016
    Inventors: Rahul Malik, Hemanth Sampath
  • METHODS AND APPARATUS FOR WAVEFORM PROTECTION IN A MIXED WIRELESS COMMUNICATION SYSTEM
    Publication number: 20160255642
    Abstract: Certain aspects of the present disclosure relate to a methods and apparatus for wireless communication. In one aspect, a method a method of communication over a wireless medium. The method includes transmitting, from a first wireless device, a first communication reserving access to the wireless medium during an indicated first time period. The first communication includes a contention-based transmission. The method further includes transmitting, during the first time period, a second communication reserving access to the wireless medium during an indicated second time period at least partially overlapping the first. The second communication includes a scheduled transmission. The method further includes transmitting or receiving a long term evolution unlicensed (LTE-U) transmission during the second time period.
    Type: Application
    Filed: February 23, 2016
    Publication date: September 1, 2016
    Inventors: Rahul Malik, Hemanth Sampath
  • METHODS AND APPARATUS FOR RECEIVING LTE-U NETWORK INFORMATION
    Publication number: 20160255643
    Abstract: Certain aspects of the present disclosure relate to a methods and apparatus for wireless communication. In one aspect, a method of decoding additional information about long-term evolution unlicensed (LTE-U) communications for enhancing wireless communication performance can include receiving, from a LTE-U device, a first wireless local area network (WLAN) packet reserving a communication medium over a time period. The first WLAN communication includes information about a LTE-U communication. The method further includes decoding, at a wireless device, information about the LTE-U communication.
    Type: Application
    Filed: February 23, 2016
    Publication date: September 1, 2016
    Inventors: Rahul Malik, Hemanth Sampath
  • METHODS AND APPARATUS FOR REDUNDANT WAVEFORM PROTECTION IN A MIXED WIRELESS COMMUNICATION SYSTEM
    Publication number: 20160255644
    Abstract: Certain aspects of the present disclosure relate to a methods and apparatus for wireless communication. In one aspect, a method of communication over a wireless medium includes transmitting, from a first wireless device, a first communication reserving access to the wireless medium during a first time period. The method further includes transmitting or receiving a long term evolution unlicensed (LTE-U) transmission during the first time period. The method further includes detecting, prior to the first time period, an interfering WLAN transmission that will result in its transmitter and recipients not detecting the first communication. The method further includes transmitting, after the interfering WLAN transmission, a second communication reserving access to the wireless medium during a second time period at least partially overlapping the first.
    Type: Application
    Filed: February 23, 2016
    Publication date: September 1, 2016
    Inventors: Rahul Malik, Hemanth Sampath
  • Systems and methods of performing link setup and authentication
    Patent number: 9426648
    Abstract: Systems and methods of performing link setup and authentication are disclosed. A method includes, at an access point, receiving an unprotected authentication request from a mobile device. The method also includes extracting an initiate message from the unprotected authentication request and sending the initiate message to an authentication server. The method further includes receiving an answer message from the authentication server, where the answer message includes a re-authentication master session key (rMSK). The method includes generating an access point nonce (ANonce) and sending an authentication response to the mobile device, where the authentication response includes the ANonce.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: August 23, 2016
    Assignee: Qualcomm Incorporated
    Inventors: George Cherian, Philip Michael Hawkes, Santosh Paul Abraham, Hemanth Sampath
  • Transmit opportunity (TXOP) based channel reuse
    Patent number: 9408230
    Abstract: A method includes determining, at a first transmitter, whether to permit reuse of a first transmit opportunity (TXOP) associated with a message. The method further includes sending a portion of the message from the first transmitter to a first receiver. The portion of the message indicates whether reuse, by a reuse transmitter, of the first TXOP is permitted. When reuse of the first TXOP is permitted, the reuse transmitter is permitted to send a second message while the first transmitter sends a second portion of the message to the first receiver during the first TXOP.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: August 2, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Hao Zhu, Srinivas Katar, Simone Merlin, Chao Zou, Gwendolyn Denise Barriac, George Cherian, Santosh Paul Abraham, Lawrence Winston Yonge, III, Hemanth Sampath
  • Systems and methods for downlink frequency domain multiplexing transmissions
    Patent number: 9398579
    Abstract: Systems, methods, and devices for transmitting data are described herein. In some aspects, a method comprises generating a first packet. The first packet may comprise a physical layer and a media access control (MAC) layer. The MAC layer may allocate a first station to a primary frequency channel and a second station to a secondary frequency channel. The method further comprises transmitting the first packet to the first station and the second station. The method further comprises transmitting a second packet to the first station using the primary frequency channel. The method further comprises transmitting a third packet to the second station using the secondary frequency channel.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: July 19, 2016
    Assignee: Qualcomm Incorporated
    Inventors: Hemanth Sampath, Bin Tian, Rahul Tandra, Gwendolyn Denise Barriac, Yan Zhou, Sameer Vermani, Simone Merlin
  • Systems and methods for backwards-compatible preamble formats for multiple access wireless communication
    Patent number: 9397805
    Abstract: Systems, methods, and devices for wireless communication are disclosed herein. One aspect of the disclosure provides a method of receiving a transmission from two or more wireless communication devices. The method includes receiving a first preamble transmitted by a first wireless device; simultaneously receiving a second preamble transmitted by a second wireless device; receiving a first portion of the transmission in a first section of a bandwidth, the first portion transmitted by the first wireless device including a first data section; and simultaneously receiving a second portion of the transmission in a second section of the bandwidth, the second section of the bandwidth not overlapping with the first section of the bandwidth, the second portion transmitted by the second wireless device, the second portion including a second data section.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: July 19, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Sameer Vermani, Rahul Tandra, Simone Merlin, Hemanth Sampath
  • ENABLING PHASE TRACKING FOR A COMMUNICATION DEVICE
    Publication number: 20160197710
    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.
    Type: Application
    Filed: March 14, 2016
    Publication date: July 7, 2016
    Inventors: Vincent Knowles Jones, IV, Hemanth Sampath, Didier Johannes Richard Van Nee
  • Systems and methods for wireless communication of packets having a plurality of formats
    Patent number: 9385911
    Abstract: Systems and methods for communicating packets having a plurality of formats are described herein. In some aspects, a signal (SIG) field in the preamble of a packet may indicate whether an extension field, such as an extension SIG field or SIG-B field, is included in the packet. In another aspect, one or more detectors may be used to auto-detect packets formatted as one of at least two different formats based on a short training field (STF) of a received packet. In some aspects, along training field (LTF) in the preamble of a packet may indicate whether the payload is repetition coded.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: July 5, 2016
    Inventors: Sameer Vermani, Santosh P. Abraham, Mohammad Hossein Taghavi Nasrabadi, Vincent K. Jones, Hemanth Sampath
  • Inter-frame spacing duration for sub-1 gigahertz wireless networks
    Patent number: 9386584
    Abstract: Systems and methods of performing communication via a sub-1 gigahertz wireless network are disclosed. Values of one or more inter-frame spacing parameters for use in communication via the sub-1 gigahertz wireless network are also defined. The parameters may include a short inter-frame spacing (SIFS) time of 160 microseconds (?s). The parameters may also include a clear channel assessment (CCA) time of 40 ?s. Additional parameters, such as air propagation time are also defined (e.g., for inclusion into a standard, such as Institute of Electrical and Electronics Engineers (IEEE) 802.11ah).
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: July 5, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Tevfik Yucek, Simone Merlin, Hemanth Sampath, Didier Johannes Richard Van Nee
  • BEACONS FOR WIRELESS COMMUNICATION
    Publication number: 20160192301
    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.
    Type: Application
    Filed: December 1, 2015
    Publication date: June 30, 2016
    Inventors: Hemanth Sampath, Simone Merlin, Santosh Paul Abraham
  • Systems and methods for communication of channel state information
    Patent number: 9374193
    Abstract: Aspects of the present disclosure relate to techniques for communicating Channel State Information (CSI) feedback. According to certain aspects, a method for wireless communications is provided. The method may include determining a modulation coding scheme (MCS) or a rate for receiving channel state information. The method may further include transmitting a frame comprising a control field indicating the determined MCS or the determined rate and at least one field indicating that at least a portion of channel state information is requested.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: June 21, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Santosh Paul Abraham, Simone Merlin, Sameer Vermani, Hemanth Sampath
  • Systems and methods for peer-to-peer and AP traffic multiplexing
    Patent number: 9369258
    Abstract: Systems, methods, and devices for concurrently allowing station-to-station transmissions and access point-to-station transmissions are described herein. In some aspects, a method comprises receiving, from a first device, a peer request to send message requesting a first time for transmissions with a second device. The method further comprises reserving the first time for transmissions between the first device and the second device. The method further comprises transmitting a coordination message to the first device and the second device. The coordination message may indicate that the first time is reserved for transmissions between the first device and the second device. The method further comprises transmitting a first data packet to a third device during a time other than the first time. The first device may transmit a second data packet to the second device during the first time.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: June 14, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Hemanth Sampath, Bin Tian, Rahul Tandra, Gwendolyn Denise Barriac, Yan Zhou, Sameer Vermani, Simone Merlin