Patents by Inventor Sandip Homchaudhuri

Sandip Homchaudhuri 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).

  • Access point-assisted positioning framework
    Patent number: 9971014
    Abstract: Methods, systems, and devices are described for a wireless positioning framework in which an access point (AP) broadcasts a message within a beacon interval that identifies a transmission schedule for a set of stations. The message may include an information element identifying the stations in the set. The set may be determined based on station clock drifts and/or a ranging accuracy sought by the AP. The AP may also provide a station identifier, and frame spacing and delay parameters, which may be used to determine a distinct backoff for each station. Using distinct backoffs allow the stations to avoid collisions when sending the transmissions. The AP may receive the transmissions according to the identified schedule and may determine a range (e.g., round-trip time) for each station in the set based at least on a time at which the respective transmission is received.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: May 15, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Xiaoxin Zhang, Sandip Homchaudhuri, Carlos Horacio Aldana
  • Methods and systems for enhanced round trip time (RTT) exchange
    Patent number: 9923792
    Abstract: Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. Such a signal round trip time measurement may be used in positioning operations.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: March 20, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Carlos Horacio Aldana, Sandip Homchaudhuri, Xin He, Xiaoxin Zhang, Ashish Kumar Shukla
  • Power management during voice calls
    Patent number: 9907023
    Abstract: Methods, systems, and devices for wireless communication are described. A station (STA) capable of supporting multiple power modes may monitor traffic on a channel. The STA may, based on the monitoring, detect an ongoing voice call between the STA and an access point (AP). Upon detection of the ongoing voice call, the STA may switch power modes from a power mode that does not support power collapse to a power mode that does support power collapse. The STA may also prompt the AP to send a downlink voice packet, if available. After a downlink transmission opportunity corresponding to the prompt occurs, the STA may enter power collapse. The STA may remain in power collapse until a subsequent uplink transmission opportunity occurs.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: February 27, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Sandip HomChaudhuri, Pradeep Kumar Yenganti
  • Sharing an antenna between LTE-U and WLAN
    Patent number: 9893758
    Abstract: In a particular aspect, a method includes receiving, at a long-term evolution (LTE) circuitry of wireless device from a wireless local area network (WLAN) circuitry of the wireless device while the LTE circuitry has control of at least one antenna of the wireless device, a request for control of the at least one antenna. Communications by the LTE circuitry using the at least one antenna corresponds to a first frequency band, communications by the WLAN circuitry using the at least one antenna correspond to a second frequency band, and the first frequency band at least partially overlaps the second frequency band. The method further includes sending a response from the LTE circuitry to the WLAN circuitry based on data included in the request.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: February 13, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Sandip HomChaudhuri, Pradeep Kumar Yenganti, Ashok Ranganath, Deepak Dhamdhere, Viral Modi, Hong Fan, Pattabiraman Subramanian, Gangadhar Burra
  • SHARING AN ANTENNA FOR WIRELESS COMMUNICATION
    Publication number: 20180026670
    Abstract: In a particular aspect, a method includes performing a first communication operation associated with a first frequency band using an antenna of a wireless device. The first communication operation is initiated by first communication circuitry of the wireless device. The first communication circuitry is associated with a first communication protocol. The method further includes, based on a duration of a second communication operation, performing the second communication operation associated with a second frequency band using the antenna of the wireless device. The second communication operation is initiated by second communication circuitry of the wireless device. The second communication circuitry is associated with a second communication protocol that is different than the first communication protocol. The first frequency band at least partially overlaps the second frequency band.
    Type: Application
    Filed: May 26, 2017
    Publication date: January 25, 2018
    Inventors: Sandip HOMCHAUDHURI, Pradeep Kumar YENGANTI, Ashok RANGANATH, Deepak DHAMDHERE, Viral MODI, Hong FAN, Pattabiraman SUBRAMANIAN, Gangadhar BURRA
  • DYNAMIC CHAIN CONFIGURATION SELECTION
    Publication number: 20170353226
    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device (e.g., an access point or a station) capable of supporting multiple chain configuration modes may monitor traffic on a wireless channel. The wireless device may, based on the monitoring, determine a series of values for a metric that is indicative of communication conditions. The metric may be a packet rate, channel congestion, or signal strength. The wireless device may dynamically select one of the supported chain configuration modes in which to operate based on the series of values for the metric. In some cases, the wireless device may compute a value for the metric based on the series of values and compare the value of the metric to a predetermined threshold. In such cases, selection of the chain configuration mode may be based on the results of the comparison. In some examples, one or metrics may be used.
    Type: Application
    Filed: June 1, 2017
    Publication date: December 7, 2017
    Inventors: Sandip HomChaudhuri, Pradeep Kumar Yenganti, Srikant Kuppa, Zhanfeng Jia, Ning Zhang, Ravi Gidvani, Subramania Sharma Thandaveswaran, Ravi Konda
  • TX SCHEDULING USING HYBRID SIGNALING TECHNIQUES
    Publication number: 20170339680
    Abstract: A system and method for managing communications between an access point (AP) and a plurality of wireless stations (STAs) over a wireless medium. The AP schedules each of the plurality of STAs to access the wireless medium during a target wake time (TWT) service period. During a first portion of the TWT service period, the AP communicates with a first subset of the plurality of STAs using a first signaling technique. During a second portion of the TWT service period, the AP communicates with a second subset of the plurality of STAs using a second signaling technique. The second subset of the plurality of STAs does not include any STAs from the first subset.
    Type: Application
    Filed: May 15, 2017
    Publication date: November 23, 2017
    Inventors: Zhanfeng Jia, Alireza Raissinia, James Cho, Sandip Homchaudhuri, Senthil Subramanian, Alfred Asterjadhi, Naveen Kumar Kakani
  • Dynamic voltage and frequency scaling in wireless modems
    Patent number: 9820229
    Abstract: Methods and apparatuses are described in which dynamic voltage and frequency scaling may be used to save power when processing packets in a wireless communications device. In some cases, inframe detection may allow the device to determine whether to transition from a first (e.g., lower) voltage level to a second (e.g., higher) voltage level to process one or more packets of a received frame. For some packet types the first voltage level may be maintained. In other cases, the device may determine a bandwidth to use from among multiple bandwidths supported by the device. The bandwidth may be determined based on channel conditions. A voltage level may be identified that corresponds to the determined bandwidth and a processing voltage may be scaled to the identified voltage level. The device may be configured to operate in wireless local area network (WLAN) and/or in a cellular network (e.g., LTE).
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: November 14, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Sandip Homchaudhuri, Joseph Duncan, Xiaoru Zhang, MeeLan Lee, Arunkumar Jayaraman, Derrick Chu Lin, Srenik Mehta
  • Polling beacon
    Patent number: 9807691
    Abstract: Beacon-poll frames are transmitted from a station (STA) to a wireless AP in an opportunistic manner. In response to receiving a beacon-poll frame, the wireless AP transmits a unicast beacon frame to the STA, thereby eliminating the need for the STA to periodically wake up to receive broadcast beacon frames from the AP. The wireless AP may transmit the unicast beacon frame at a higher speed than a conventional broadcast beacon frame. As a result, the time that the STA must be awake to receive the unicast beacon frame is significantly less than the time that the STA must be awake to receive a conventional broadcast beacon frame, thereby resulting in significant power savings within the STA. The wireless AP may aggregate downlink (DL) data packets to be transmitted to the STA with the unicast beacon frame, resulting in further power savings within the STA.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: October 31, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Zhanfeng Jia, Sandip HomChaudhuri, Alireza Raissinia
  • Adaptive control of RF low power modes in a multi-rate wireless system using MCS value
    Patent number: 9804664
    Abstract: Methods, systems, and devices are described for power conservation in a wireless communications system. In embodiments, power conservation may be achieved by adaptively controlling power modes of a wireless communication device, using a modulation and coding scheme (MCS) value as a factor for guidance. According to one aspect, the device may be in a reception mode. While in a first power mode, the device may receive control information for incoming data that is being transmitted via a transmission frame. The control information may be located in a first portion of the frame with the data following in a second portion of the frame. The control information may include or otherwise indicate an MCS value corresponding to the MCS applied to the incoming data. Based on the MCS value, the device may be adaptively switched to a second power mode for receiving the incoming data.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: October 31, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Sandip Homchaudhuri, Paul Husted, MeeLan Lee, Srenik Mehta, Kai Shi, Shahram Abdollahi-Alibeik, Zhanfeng Jia, Soraya Kasnavi, Ning Zhang, David Kuochieh Su, Subramania Sharma Thandaveswaran, Kenneth Gainey, Ian David O'Donnell
  • METHODS AND SYSTEMS FOR ENHANCED ROUND TRIP TIME (RTT) EXCHANGE
    Publication number: 20170310570
    Abstract: Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. Such a signal round trip time measurement may be used in positioning operations.
    Type: Application
    Filed: June 16, 2017
    Publication date: October 26, 2017
    Inventors: Carlos Horacio Aldana, Sandip Homchaudhuri, Xin He, Xiaoxin Zhang, Ashish Kumar Shukla
  • Adaptive control of RF low power modes in a multi-rate wireless system using device mode
    Patent number: 9781673
    Abstract: Methods, systems, and devices are described for power conservation in a wireless communications system. In embodiments, power conservation may be achieved by adaptively controlling power modes of a wireless communication device, and implementing lower power modes with various modes of the device. According to one aspect, the mode of the device may be a beacon monitoring mode or a delivery traffic indication message (DTIM) mode. In such a mode, the device may receive a portion of a beacon in a first power mode. The device may transition to a second, different (e.g., higher) power mode using information contained in the received portion of the beacon as guidance.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: October 3, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Sandip Homchaudhuri, Paul Husted, MeeLan Lee, Srenik Mehta, Kai Shi, Shahram Abdollahi-Alibeik, Zhanfeng Jia, Soraya Kasnavi, Ning Zhang, David Kuochieh Su, Subramania Sharma Thandaveswaran, Kenneth Gainey, Ian David O'Donnell
  • WIRELESS COMMUNICATION INVOLVING A WAKE TIME PERIOD FOR A STATION
    Publication number: 20170280388
    Abstract: A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, an apparatus is configured to receive information indicating a wake time period from a STA and use the received wake time period to schedule communication with the STA. The apparatus may use the received wake time period to determine a target transmission time for transmitting a trigger frame to the STA. The apparatus may transmit a beacon to the STA and then transmit the trigger frame to the STA at the target transmission time following the beacon. The apparatus may also indicate an offset from the beacon that the apparatus will use for communication with the STA based on the wake time period of the STA.
    Type: Application
    Filed: March 27, 2017
    Publication date: September 28, 2017
    Inventors: Alfred ASTERJADHI, George CHERIAN, Simone MERLIN, Sandip HOMCHAUDHURI, Zhanfeng JIA, Sumeet KUMAR, Pradeep Kumar YENGANTI
  • REQUEST-TO-SEND/CLEAR-TO-SEND ENABLED POWER SAVING AND OFF-CHANNEL OPERATIONS
    Publication number: 20170273017
    Abstract: Methods, systems, and devices for wireless communication are described. An access point (AP) may direct stations (STAs) to use a request-to-send (RTS)/clear-to-send (CTS) mode so the AP may perform power savings and off-channel operations without disrupting the communications of nearby devices. In some cases, the AP may use traffic conditions to identify a power save period and subsequently transmit an indication of an RTS/CTS mode to multiple STAs. In one example, the AP may power down at least one radio frequency (RF) chain and enter into a sleep mode. Additionally or alternatively, during the power save period the AP may receive an RTS from a STA and power up additional radio chains for MIMO communication. In some cases, the AP may identify an off-channel operations period based on traffic conditions and perform the off-channel operations after indicating the RTS/CTS mode to a set of STAs.
    Type: Application
    Filed: March 7, 2017
    Publication date: September 21, 2017
    Inventors: Ravi Gidvani, Sandip HomChaudhuri, Vikram Phogat
  • RADIO FREQUENCY SPECTRUM BAND HARMONIZATION
    Publication number: 20170265205
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be communicating on a radio frequency spectrum band of a first radio access technology (RAT) using a set of antennas. The UE may reconfigure at least one antenna of the set of antennas to perform a first scan on the radio frequency spectrum band of a second RAT. The UE may determine, based on the first scan, whether to reconfigure a remaining portion of the antennas of the set of antennas to perform a second scan on the radio frequency spectrum band of the second RAT.
    Type: Application
    Filed: August 26, 2016
    Publication date: September 14, 2017
    Inventors: Sandip HomChaudhuri, Gangadhar Burra, Eric Y. Tsou, Chintan Shirish Shah, Francis Ming-Meng Ngai, Alexei Yurievitch Gorokhov, Pattabiraman Subramanian, Ning Zhang, James Simon Cho
  • Methods and systems for enhanced round trip time (RTT) exchange
    Patent number: 9699052
    Abstract: Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. Such a signal round trip time measurement may be used in positioning operations.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: July 4, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Carlos Horacio Aldana, Sandip Homchaudhuri, Xin He, Xiaoxin Zhang, Ashish Kumar Shukla
  • Adapting blind reception duration for range and congestion
    Patent number: 9655054
    Abstract: Methods, systems, and devices are described for adapting blind reception duration for range and congestion. A wireless station may measure channel conditions (e.g., range to an access point (AP) and channel congestion), and adjust one or more sleep timers based on the conditions. The sleep timers may each be associated with a window for reception of an expected transmission. If the transmission is not received in the window, the station may enter a sleep state to conserve power. In one example, a beacon miss timer is adjusted, and the expected wireless transmission is a delivery traffic indication message (DTIM). In another example, a content after beacon (CAB) timer is adjusted and the expected wireless transmission is the CAB. In some cases, the station may measure a delay for a number of beacons and determine the adjustment based on the delays.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: May 16, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Sandip HomChaudhuri, Fnu Rajkumar Samuel, Nitin Ashok Changlani, Arunkumar Jayaraman, Pradeep Baliganapalli Nagaraju, Sumeet Kumar, Lian Chen, James Simon Cho
  • Congestion adapted active scan dwell time
    Patent number: 9629153
    Abstract: Methods, systems, and apparatuses are described for adaptive dwell time for scan procedures. An access terminal (AT) may identify a scan period associated with performing a scan procedure on a first channel. The AT may analyze a channel congestion metric during the scan period and determine based, at least in part, on the channel congestion metric whether to exit the first channel. The AT may provide a probe request for transmission on a second channel during a remaining portion of the scan period based on the determination to exit the first channel.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: April 18, 2017
    Assignee: QULCOMM Incorporated
    Inventors: Sandip HomChaudhuri, Pradeep Kumar Yenganti
  • Shared antenna loss detection and recovery
    Patent number: 9628166
    Abstract: Methods, systems, and devices are described for wireless communication at a wireless communications device. The device may use several antennas to receive a signal, one of which may be shared between two radios. During signal reception, a radio may detect when the shared antenna is abruptly taken over by the other radio. The radio may detect the loss of the antenna by measuring an impedance mismatch. Alternatively, the radio may reference an antenna switch control that is used to facilitate the switch. After detection, the radio may recover from the antenna loss by adjusting signal processing. For example, the radio may modify a maximal ratio combining (MRC) operation. In certain examples, the device may disregard the signal version from the shared antenna in the computation of MRC weights. In some cases, the device may interrupt an MRC weight computation and use MRC weights from a previous calculation.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: April 18, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Sandip HomChaudhuri, Gangadhar Burra, Alireza Raissinia
  • DYNAMIC FREQUENCY SELECTION CHANNEL SCAN OPTIMIZATIONS
    Publication number: 20170094556
    Abstract: Methods, systems, and apparatuses are described for adaptive dwell time for scan procedures. A wireless station (STA) may identify a scan period during which a passive scan procedure is performed on a first channel. The STA may analyze a channel congestion metric during at least a portion of the scan period. The STA may transition from the passive scan procedure to an active scan procedure on the first channel during the scan period based at least in part on the analyzed channel congestion metric.
    Type: Application
    Filed: September 25, 2015
    Publication date: March 30, 2017
    Inventors: Sandip HomChaudhuri, Pradeep Kumar Yenganti, Michael Richard Green, Alireza Raissinia, Srinivas Katar, Hoon Ki Lee