Patents by Inventor Srinivas Katar

Srinivas Katar 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).

  • 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
  • Patent number: 9385782
    Abstract: Network signals are coupled to and from a first communication medium that is coupled to one or more nodes of a first network that exchange signals according to at least one scheduling constraint of the first communication medium. Network signals are coupled to and from a second communication medium that is coupled to one or more nodes of a second network that exchange signals according to a schedule compatible with scheduling information received from the first network. Information conveyed by the coupled network signals is communicated between a first network node and a second network node, according to the schedule compatible with the scheduling information received from the first network.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: July 5, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Lawrence W. Yonge, III, Srinivas Katar
  • Patent number: 9385966
    Abstract: Systems and methods for allocating network bandwidth between a plurality of networks. Requests for bandwidth allocation from other networks can be received. A coexistence frame requesting an allocation of bandwidth for a local network can be generated based upon the bandwidth allocation requests received from other networks. The coexistence frame can be transmitted, and utilization of the requested allocation can be delayed by a reservation period.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: July 5, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Lawrence Winston Yonge, III, Srinivas Katar, Richard E. Newman
  • Publication number: 20160165475
    Abstract: Methods, apparatus, and computer-readable media for wireless communication may involve techniques for throughput estimation. An expected air time parameter may be used as a parameter for estimating throughput. The expected air time parameter may be indicative of an estimated air time fraction obtainable for communications using an access point (AP), for example, between a wireless station (STA) and the AP. Either the expected air time parameter or an estimated air time fraction determined (e.g., calculated) from the expected air time parameter may be transmitted from the AP to the STA (or other communication device) to allow the STA (or other communication device) to determine an estimated throughput for communications using the AP.
    Type: Application
    Filed: December 8, 2015
    Publication date: June 9, 2016
    Inventors: Youhan Kim, Zhanfeng Jia, Srinivas Katar, Rahul Malik, Jay Kumar Sundararajan, Arnaud Meylan, Ning Zhang, George Cherian
  • Publication number: 20160142176
    Abstract: Methods, apparatus, and computer-readable media for wireless communication by an access point (AP) may involve communicating with a station using a first modulation and coding scheme (MCS). An under-utilization of a medium access control (MAC) protocol data unit (MPDU) aggregation of the station while using the first MCS may be identified. The under-utilization may be caused by packet error rate (PER)-induced head of line (HOL) blocking. The MCS may be switched to a second MCS that is lower than the first MCS.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 19, 2016
    Inventors: Qinghai Gao, Xialong Huang, Vincent Knowles Jones, IV, Srinivas Katar, James Simon Cho
  • Publication number: 20160142232
    Abstract: Methods, systems, and devices are described for wireless communications. More particularly, the described features relate to techniques for adjusting a modulation and coding scheme (MCS) to account for different airtime utilizations (available airtime actually utilized by a device for transmissions) resulting from different MCSs. In one example, a method for wireless communication may involve: determining a media access control (MAC) efficiency for a station of a plurality of stations based at least in part on a real-time multi-user (MU) physical protocol data unit (PPDU) length, a real-time physical layer service data unit (PSDU) length of each of the plurality of stations, and a modulation and coding scheme (MCS) of the station; adjusting a goodput estimate of the station using the MAC efficiency; and, adjusting the MCS of the station using the adjusted goodput estimate.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 19, 2016
    Inventors: Qinghai Gao, Xiaolong Huang, Vincent Knowles Jones, IV, Srinivas Katar, James Simon Cho
  • Patent number: 9326316
    Abstract: Communicating between stations over a shared medium comprises: receiving, at a destination station, a first waveform that includes one or more segments of a payload that originated from an origin station with a sequence of multiple segments, the one or more segments included in the first waveform having been transmitted over the shared medium by the origin station and by each of one or more repeater stations, and the first waveform indicating which of the sequence of multiple segments were not correctly decoded by at least one of the repeater stations; generating, based on the first waveform, acknowledgement information that specifies which of the sequence of multiple segments have been correctly decoded by the destination station; and transmitting a second waveform from the destination station over the shared medium, the second waveform including the acknowledgement information.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: April 26, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Lawrence W. Yonge, III, Srinivas Katar
  • Patent number: 9326317
    Abstract: A waveform communicated from a first station to a second station over a shared medium may include at least the first symbol comprising a first set of frequency components at predetermined carrier frequencies modulated with preamble information and a second set of frequency components at predetermined carrier frequencies modulated with frame control information. The first symbol may comprise a single symbol delimiter.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: April 26, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Lawrence Winston Yonge, III, Srinivas Katar
  • Patent number: 9325377
    Abstract: A powerline communication adapter may couple powerline communication signals between a network device and a powerline communication network. The powerline communication adapter may comprise of a first electrical connector including an electrical socket and a second electrical connector including an electrical plug. The powerline communication adapter may include a coupling unit coupled between the first electrical connector and the second electrical connector. The coupling unit may be configured to couple a powerline communication signal received via the first electrical connector to the second electrical connector to transmit the powerline communication signal via at least two powerline communication channels in the powerline communication network.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 26, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Syed Adil Hussain, Lawrence W. Yonge, III
  • Patent number: 9325618
    Abstract: Communicating among stations in a network includes assigning transmission opportunities among a plurality of stations, sending information about transmission requirements in at least one message sent from a first station in the plurality of stations to a second station, and changing the transmission opportunities based on the information in the at least one message.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: April 26, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Lawrence W. Yonge, III, Srinivas Katar
  • Patent number: 9295100
    Abstract: Communicating between stations over a shared medium comprises: receiving a first waveform at a first station transmitted over the shared medium from a second station, the first waveform including a payload having multiple segments, and during reception of a first segment of the payload, initiating processing of one or more segments of the payload received before the first segment of the payload to generate acknowledgement information that specifies which of one or more segments of the payload including the one or more processed segments have been correctly decoded by the first station; transmitting a second waveform from the first station over the shared medium, the second waveform including the acknowledgement information; and transmitting a third waveform from the first station over the shared medium, after transmitting the second waveform, the third waveform including acknowledgement information that specifies which of one or more segments of the payload including the first segment of the payload have been
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: March 22, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Lawrence W. Yonge, III, Srinivas Katar, Manjunath Krishnam
  • Publication number: 20160014047
    Abstract: A master network device determines to transmit data from the master network device to a plurality of client network devices of a network. In one example, the master network device can generate a data frame including a payload with a plurality of symbols. The payload may include at least one symbol allocated for each of the client network devices. The plurality of symbols may be arranged in a predefined pattern in the payload. In another example, the master network device may generate a data frame including a payload with one or more symbols. Each symbol may include a plurality of frequency carriers, and may include at least one frequency carrier allocated for each of the client network devices. The plurality of frequency carriers can be allotted to the client network devices according to a partitioning pattern. The master network device then transmits the data frame to the client network devices.
    Type: Application
    Filed: September 21, 2015
    Publication date: January 14, 2016
    Inventors: Rouhana Rouhana, Hassan Kaywan Afkhami, Srinivas Katar
  • Publication number: 20150372996
    Abstract: A slotted message access protocol can be implemented for transmitting messages in a communication network. A beacon period may be divided into multiple communication slots. A master network device may register a first client network device and provide registration information to the first client network device. The registration information may include one or more encryption keys to allow the first client network device to securely transmit messages in the communication network. The client network device may use an encryption key associated with a second client network device to decrypt messages received from the second client network device. Furthermore, the first client network device may use a contention-based communication slot to request allocation of contention-free communication slots for subsequent transmissions. The master network device may temporarily allocate contention-free communication slots to the client network device for a specified duration.
    Type: Application
    Filed: June 18, 2015
    Publication date: December 24, 2015
    Inventors: Sidney Brower Schrum, JR., Lawrence Winston Yonge, III, Srinivas Katar, Hao Zhu, Richard Ernest Newman
  • Publication number: 20150372717
    Abstract: A slotted message access protocol can be implemented for transmitting messages in a communication network. A beacon period may be divided into multiple communication slots. A master device may register a client device and provide registration information to allow the client device to operate in the communication network. The registration information may be determined based, at least in part, on a location of the client device in the communication network. As part of the registration information, contention-free communication slots may be assigned for use by the client device. Contention-based communication slots may also be assigned to a group of client devices. Messages may also be segmented depending on whether the message is transmitted in a contention-free or a contention-based communication slot. Furthermore, a relay device may be designated to retransmit a message (received from an original transmitting device) during a communication slot assigned to the original transmitting device.
    Type: Application
    Filed: June 17, 2015
    Publication date: December 24, 2015
    Inventors: Sidney Brower Schrum, JR., Lawrence Winston Yonge, III, Srinivas Katar, Hao Zhu
  • Publication number: 20150350917
    Abstract: Channel reuse permits more than one station to communicate concurrently via a communication medium. A first station may transmit a first transmission to a second station. A third station may detect the first transmission and determine a channel a channel reuse time period for a second transmission transmitted from the third station to a fourth station via the communication medium at least partially concurrently with the first transmission. The channel reuse time period may be based at least in part on estimated time to a next priority resolution slot (PRS) of the communication medium as determined from information in a start of frame (SOF) delimiter of the first transmission. The channel reuse time period may take into account a media access control (MAC) protocol data unit (MPDU) burst, and/or time periods associated with acknowledgement messages.
    Type: Application
    Filed: May 27, 2014
    Publication date: December 3, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Hao Zhu, Lawrence Winston Yonge, III
  • Patent number: 9154312
    Abstract: Power save proxy functionality can be implemented to enable power save devices to switch to a power save mode and still receive communications from legacy communication devices. A first communication device determines that a second communication device is in a power save mode. The first communication device designates itself as a power save proxy for the second communication device that is in the power save mode. In response to detecting packets that are transmitted from a legacy communication device to the second communication device, the first communication device transmits a control message to the second communication device to request the second communication device to exit the power save mode, transmits a hold control message to the legacy communication device to request the legacy communication device to temporarily stop transmitting packets to the second communication device, or stores the packets intended for the second communication device.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: October 6, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Lawrence W. Yonge, III, Manjunath Anandarama Krishnam
  • Patent number: 9148385
    Abstract: Communicating among stations in a network includes, from each of multiple stations in the network, transmitting information indicating which other stations from which that station is able to reliably receive transmissions. A schedule for communicating among the stations is determined based on the information from the stations and transmitting the schedule over the network. The schedule includes a plurality of time slots during which respective contention groups of stations are assigned to communicate using a contention-based protocol.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: September 29, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Lawrence Winston Yonge, III, Srinivas Katar, Manjunath Anandarama Krishnam
  • Publication number: 20150264689
    Abstract: A method comprises receiving a first message over a first portion of a frequency bandwidth. The first message includes an identifier of a transmitting first wireless device and an intended recipient second wireless device. The method comprises determining whether a second portion of the frequency bandwidth is idle for a duration of time including at least one of a PIFS time and a time required for a backoff timer to expire. The method comprises transmitting a second message over the second portion of the frequency bandwidth by a third wireless device, the second message having a limited transmission time that is not to extend beyond a transmission time of the first message, thereby allowing an availability of the first and second portions for use after an end of the transmission time of the first message. The third wireless device is not an intended recipient of the first message.
    Type: Application
    Filed: March 13, 2015
    Publication date: September 17, 2015
    Inventors: Hemanth Sampath, Simone Merlin, George Cherian, Srinivas Katar, Hao Zhu
  • Patent number: 9137004
    Abstract: Channel reuse may be used so that multiple networks may communicate via a shared powerline communication (PLC) medium. In a PLC network that supports different transmission modes, channel reuse may be improved by determining signal performance metrics associated with the different transmission modes. A transmission mode may be selected to facilitate channel reuse of the PLC medium by the local network and neighbor network. A first device and a second device may belong to a local network that shares the PLC medium with a neighbor network. The transmission mode may be selected based on interference and signal measurements at one or more receivers of the second device. The transmission mode may be selected from a group comprising a 2-stream multi-input multi-output (MIMO) eigen-beamforming transmission mode, a 1-stream MIMO spot-beamforming transmission mode, and a 1-stream single-input-single-output (SISO) transmission mode.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: September 15, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Hao Zhu, Deniz Rende, Lawrence Winston Yonge, III
  • Patent number: 9130658
    Abstract: A network device can be configured to dynamically adapt its current primary receiver coupling to channel conditions. For each of a plurality of transmitting network devices, the network device can determine a potential primary receiver coupling of the first network device for receiving communications from the transmitting network device based, at least in part, on a performance measurement associated with each of the plurality of communication channels between the network device and the transmitting device. The network device can select its current primary receiver coupling based, at least in part, on the potential primary receiver couplings determined for the plurality of transmitting network devices. In addition, the network device can also determine how to communicate with a receiving network device based, at least in part, on a preferred communication channel between the two network devices and a current primary receiver coupling of the receiving network device.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: September 8, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Hao Zhu, Lawrence Winston Yonge, III, Manjunath Anandarama Krishnam