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).

  • Publication number: 20170064618
    Abstract: Methods, systems, and devices are described for wireless communications. A communication device may utilize enhanced roaming techniques to dynamically adjust signal strength thresholds in a high density AP environment. For instance, a communication device determines a signal strength of a communication link between a wireless device and an access point (AP). The communication device further compares the signal strength value to at least a low threshold and a high threshold and performs a channel scan for the communication link when the signal strength value is below the low threshold. The communication device also adjusts the low threshold when the signal strength value is greater than the high threshold.
    Type: Application
    Filed: September 2, 2015
    Publication date: March 2, 2017
    Inventors: Srinivas Katar, Xiaolong Huang, Keshav Kishore Sahai, Farrukh Usmani, Hoon Ki Lee
  • Patent number: 9577923
    Abstract: An advanced gateway for multiple broadband access can include a plurality of broadband network interfaces. The advanced gateway can route data from a local network interface to a broadband network interface when a performance attribute of the broadband network meets or exceeds a data characteristic of data conveyed through the local network interface. In another embodiment, a first advanced gateway can send a portion of data received through the local network interface to a second advanced gateway when performance attributes associated with the first advanced gateway cannot meet or exceed a data characteristic of data received through a local network interface of the first advanced gateway. In yet another embodiment, an advanced gateway can receive commands from service providers, determine a recipient device for the command and forward the command to the recipient device through a device interface coupled to the recipient device.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 21, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Purva R. Rajkotia, Todd D. Antes, Srinivas Katar, Hassan Afkhami
  • Publication number: 20170041961
    Abstract: Methods, systems, and devices are described for wireless communication. A wireless device may detect a delay in reverse link throughput. The wireless device may reduce the delay by modifying channel access parameters. In one aspect, the wireless device may adjust enhanced distributed channel access (EDCA) parameters. For example, the wireless device may modify contention window size (CW) and arbitration interframe spacing (AIFS). In some cases, the wireless device may instigate EDCA parameter adjustments in another wireless device in the wireless system (e.g., by sending an EDCA adjustment request message). The channel access adjustments may be triggered by detection of various conditions that are indicative of the reverse link delay. For example, the wireless device may monitor the communication of acknowledgments (ACKs) and adjust EDCA parameters if the ACKs are delayed. In other cases, the wireless device may adjust EDCA parameters based at least in part on multi-user (MU) communications.
    Type: Application
    Filed: August 5, 2015
    Publication date: February 9, 2017
    Inventors: Chao Zou, Srinivas Katar, Xiaolong Huang, Hao Zhu
  • Publication number: 20170019837
    Abstract: Systems and methods are disclosed that may adjust the likelihood and/or frequency with which a wireless device performs scanning operations to reduce power consumption without degrading the ability of the wireless device to identify the best available access point with which to associate. In some aspects, the wireless device may adjust the likelihood and/or frequency of performing scanning operations based on a motion state of the wireless device, a change in the motion state of the wireless device, a signal strength of an associated access point, and/or the connection status of the wireless device.
    Type: Application
    Filed: March 9, 2016
    Publication date: January 19, 2017
    Inventors: Srinivas Katar, Xiaolong Huang, Hoon Ki Lee, Farrukh Usmani
  • Publication number: 20170013493
    Abstract: Methods, systems, and devices are described for wireless communications. A device may utilize enhanced roaming techniques to identify a candidate channel for roaming. In one example, a device determines whether a candidate channel is congested by calculating a congestion metric associated with traffic over the shared channel. In some examples, the congestion metric is calculated based at least in part on an amount of energy measured over the candidate. For instance, the calculated congestion metric can be an instantaneous congestion level measured during a CCA. The device may then determine whether to roam to the candidate channel based at least in part on the calculated congestion metric.
    Type: Application
    Filed: November 17, 2015
    Publication date: January 12, 2017
    Inventors: Sandip HomChaudhuri, Xiaolong Huang, Pradeep Kumar Yenganti, Srinivas Katar
  • Publication number: 20170006480
    Abstract: Methods, systems, and devices are described for wireless communications. An access point (AP) communicates to a multi-user (MU) group of stations (STAs) that are assigned disparate modulation and coding schemes (MCSs). The AP sends an MU transmission to the MU group using an MCS and transmit power combination that is associated with the highest estimated throughput. The AP selects the MCS and transmit power combination from two configurations. In the first configuration, a single MCS and corresponding transmit power is used for the MU transmission. In the second configuration, a single transmit power and two different MCSs are used for the MU transmission. Both configurations may use the MCSs associated with the STAs in the MU group. The transmit power may correspond to one of the selected MCSs.
    Type: Application
    Filed: October 1, 2015
    Publication date: January 5, 2017
    Inventors: Xiaolong Huang, Srinivas Katar, Chao Zou
  • Patent number: 9538535
    Abstract: A system and method are disclosed that may allow a STA to selectively change frequency bands from an operating band to a candidate band based on operating conditions. In response to determining that a channel condition is within a band switch region associated with a candidate band, the STA may select the candidate band and temporarily switch to it. The STA may select an initial modulation and coding scheme for the candidate band and probe the candidate band with data to determine an estimate of candidate band goodput. If the estimate of candidate band goodput is greater than the operating band goodput, the STA may switch to the candidate band.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: January 3, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Xiaolong Huang, Tevfik Yucek, Srinivas Katar
  • Patent number: 9537792
    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: Grant
    Filed: August 30, 2013
    Date of Patent: January 3, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Rouhana Rouhana, Hassan Kaywan Afkhami, Srinivas Katar
  • Patent number: 9537641
    Abstract: A first powerline communication device, associated with a first powerline communication network, determines a plurality of time intervals in a beacon period of the first powerline communication network based, at least in part, on variations in levels of interference from a second powerline communication network which shares a powerline communication medium with the first powerline communication network. The first powerline communication device determines at least one channel adaptation parameter for each of the plurality of time intervals in the beacon period to compensate for effects of the variations in the levels of interference from the second powerline communication network. The first powerline communication device applies the at least one channel adaptation parameter corresponding to one or more of the plurality of time intervals in the beacon period when transmitting data via the powerline communication medium.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: January 3, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Hassan Kaywan Afkhami, Hao Zhu, Lawrence Winston Yonge, III
  • Patent number: 9521090
    Abstract: Systems and methods for connecting new stations to a secure network. New stations can send connection requests to a headend device. The headend device can retrieve a device access key associated with the new station and can provide a network membership key to the new station based upon authentication of the new station using the device access key.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: December 13, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Lawrence W. Yonge, III, Srinivas Katar, Manjunath Krishnam
  • Publication number: 20160345343
    Abstract: Methods, systems, and apparatuses are described for wireless communications. More particularly, an access point (AP) identifies a plurality of multi-user multiple-input multiple-output (MU-MIMO) groups associated with a wireless station (STA). The AP determines a communication metric associated with each of the plurality of MU-MIMO groups. The communication metric provides an indication of the compatibility of the STAs in the MU-MIMO group. The AP prioritizes at least one of the plurality of MU-MIMO groups based at least in part on the communication metric associated with the prioritized MU-MIMO group. The AP creates a preferred group list and/or a blacklisted group list and included the prioritized MU-MIMO group in the appropriate group list.
    Type: Application
    Filed: September 17, 2015
    Publication date: November 24, 2016
    Inventors: Ahmed Ragab Elsherif, Qinghai Gao, Xiaolong Huang, Ehab Tahir, Nathaniel Houghton, Vincent Knowles Jones, IV, Srinivas Katar
  • Publication number: 20160338059
    Abstract: A system and method are disclosed that may allow a STA to selectively change frequency bands from an operating band to a candidate band based on operating conditions. In response to determining that a channel condition is within a band switch region associated with a candidate band, the STA may select the candidate band and temporarily switch to it. The STA may select an initial modulation and coding scheme for the candidate band and probe the candidate band with data to determine an estimate of candidate band goodput. If the estimate of candidate band goodput is greater than the operating band goodput, the STA may switch to the candidate band.
    Type: Application
    Filed: May 11, 2015
    Publication date: November 17, 2016
    Inventors: Xiaolong Huang, Tevfik Yucek, Srinivas Katar
  • Publication number: 20160295580
    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).
    Type: Application
    Filed: April 3, 2015
    Publication date: October 6, 2016
    Inventors: Srinivas Katar, James Simon Cho, Guido Frederiks, Qinghai Gao, Xiaolong Huang, Chao Zou, Rahul Malik
  • Patent number: 9451558
    Abstract: Network devices can be configured to implement adaptive power control functionality in a communication network. A power control requestor of a local communication network can calculate a link margin between a neighbor network device of a neighbor communication network and a local network device associated with a least preferred performance measurement. The power control requestor can transmit a power control message including the link margin to request the neighbor network device to vary the transmit power of the neighbor network device. In response to receiving a power control message, a power control responder can use a link margin indicated in the power control message to evaluate the feasibility of reducing the transmit power of the power control responder. The power control responder can transmit a power control response indicating whether it will vary the transmit power.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: September 20, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Hao Zhu, Srinivas Katar, Lawrence Winston Yonge, III
  • Patent number: 9445361
    Abstract: A first client may establish a power charging association with one of a plurality of service agents over a network. The first client transmits a first signal via a first attachment point of a powerline network, the first signal associated with requesting the power charging association. The first client broadcasts a sounding message via the first attachment point after transmitting the first signal, wherein the sounding message is receivable by one or more service agents including at least a first service agent of the powerline network. The first service agent received the sounding message with a lowest attenuation of the one or more service agents that received the sounding message. The power charging association is established between the first client and the first service agent.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: September 13, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: James Gerard Zyren, Srinivas Katar, Manjunath Anandarama Krishnam, Lawrence Winston Yonge, III
  • Patent number: 9438382
    Abstract: A Response Interframe Space (RIFS) time period may be adapted in a communication system. The RIFS time period may be based, at least in part, on channel conditions (e.g., data rate) between a first device and a second device. The RIFS may be optimized in consideration of channel conditions for a particular communications channel and/or characteristics of a particular physical layer transmission. In one embodiment, the RIFS may be dependent on characteristics of a final modulation symbol in a physical layer transmission. The final modulation symbol may include more than one PHY blocks (PBs) or portions of PBs. The RIFS may depend on a number of PBs that end in the final modulation symbol.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: September 6, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Lawrence Winston Yonge, III
  • Patent number: 9413686
    Abstract: Systems and methods for communicating and authenticating end-to-end management keys to stations to facilitate communications between stations in the network. A nonce based upon a pseudo-random number generated by the station(s) can be included with the end-to-end management key (EMK). The station(s) can compare the nonce to the generated pseudo-random number to authenticate the EMK.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: August 9, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Lawrence W. Yonge, III, Manjunath Krishnam
  • Patent number: 9413688
    Abstract: A method includes determining that a first station has been allocated a first time period to transmit over a shared medium in a network. The method includes transmitting, from the first station to a second station over the shared medium during the first time period, wherein stations other than the first station and the second station refrain from transmitting over the shared medium during the first time period. The method includes receiving, from the second station, a request message to allow the second station to transmit during the first time period and a requested amount of time to transmit. The method includes, in response to allowing the second station to transmit during the first time period, determining an authorized amount of time for the second station to transmit during the first time period, and transmitting an authorization message for the second station to transmit and the authorized amount of time.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: August 9, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Katar, Lawrence Winston Yonge, III, Manjunath Anandarama Krishnam, Bradley Robert Lynch, Ehab Tahir
  • Publication number: 20160226566
    Abstract: Methods, devices, and computer-readable media for wireless communication may involve techniques for managing multi-user (MU) operation when a device in a wireless network has coexisting radios. Such techniques may involve identifying a change in a multiple radio access technology (RAT) coexistence status of a first device, e.g., a change between a coexistence status that is not disruptive to MU communications and one that is disruptive. For a device communicating with a network using Wi-Fi, the change in the multiple RAT coexistence status may indicate a change between inactive Bluetooth (BT) communications and active BT communications concurrent with Wi-Fi communications. Based at least in part on the identified change in the multiple RAT coexistence status, a MU communications operation at a second device may be adjusted, for example, by disabling MU communication between the first and second devices over a first RAT when the first device changes to a coexistence status that may disrupt MU communications.
    Type: Application
    Filed: August 20, 2015
    Publication date: August 4, 2016
    Inventors: Olaf Josef Hirsch, Xiaolong Huang, Srinivas Katar
  • Publication number: 20160227544
    Abstract: Method, systems, and apparatuses are described for wireless communications. More particularly, a wireless station may connect to a wireless network using a first radio frequency (RF) band and detect a signal strength of the first RF band is greater than a roaming threshold. The wireless station may perform a plurality of scans for support by the wireless network of a second RF band in response to the detected signal strength. Each scan may occur when the signal strength of the first RF band is greater than the roaming threshold. The wireless station may selectively connect to the wireless network using the second RF band based at least in part on the scanning and a throughput supported by the wireless network over the second RF band. The first RF band may be a 2.4 GHz band and the second RF band may be a 5 GHz band.
    Type: Application
    Filed: January 28, 2016
    Publication date: August 4, 2016
    Inventors: Srinivas Katar, Amod Bodas, Ramaswamy Venkateshwaran, Farrukh Usmani, Ravi Gidvani, Hang Su