Patents by Inventor Venkatraman Rajagopalan
Venkatraman Rajagopalan 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).
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Publication number: 20240163833Abstract: Disclosed are techniques for wireless communication. In an aspect, a wireless communications device detects a trigger to communicate via non-terrestrial network (NTN) connectivity, determines whether one or more obstructions are estimated to be blocking a subset of NTN space vehicles of a set of NTN space vehicles expected to be in view of the wireless communications device at a current location of the wireless communications device, and transmits, in response to a determination that the one or more obstructions are estimated to be blocking the subset of NTN space vehicles, at least one message towards at least one NTN space vehicle of the set of NTN space vehicles other than the subset of NTN space vehicles.Type: ApplicationFiled: September 29, 2023Publication date: May 16, 2024Inventors: Junsheng HAN, Kannan MUTHURAMAN, Francesco GRILLI, Carl HARDIN, Venkatraman RAJAGOPALAN
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Publication number: 20240064679Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may obtain updated location information, and determine a time difference between a previous communication with a network and a scheduled uplink transmission. Based on the determined time difference, the UE may determine a timing advance (TA) component of a TA value to apply for the uplink transmission, and transmit an uplink message in the uplink transmission according to the determined TA value and the location information. In some examples, the time difference may be based on a first duration between the uplink transmission and a previous uplink transmission, a second duration between the uplink transmission and a previous TA command received from the network, or both. In some examples, the determined TA value may be based on additional parameters, such as an autonomous adjustment step, an aggregate adjustment rate, a scaling factor, or any combination thereof.Type: ApplicationFiled: August 22, 2022Publication date: February 22, 2024Inventors: Lianghai Ji, Changhwan Park, Mehmet Izzet Gurelli, Liangping Ma, Venkatraman Rajagopalan, Mohamad Sayed Hassan, Qiang Wu, Jun Ma, Huilin Xu, Weimin Duan, Karthik Anantha Swamy, Alexander Dorosenco, Onur Senel, Nitzan OFer, Yan Wang
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Patent number: 10263691Abstract: A method and apparatus for operating a satellite access network (SAN) of a satellite communication system to schedule communications with a user terminal. In some aspects, the SAN may provision a communication frame, for the user terminal, into a number of forward-link (FL) subframes and a different number of reverse-link (RL) subframes. The SAN then transmits the FL subframes to the user terminal via a forward link of the satellite communication system, and subsequently receives the RL subframes from the user terminal via a reverse link of the satellite communication system.Type: GrantFiled: September 21, 2016Date of Patent: April 16, 2019Assignee: QUALCOMM IncorporatedInventors: Venkatraman Rajagopalan, Jelena Damnjanovic, Qiang Wu
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Publication number: 20180083694Abstract: A method and apparatus for operating a satellite access network (SAN) of a satellite communication system to schedule communications with a user terminal. In some aspects, the SAN may provision a communication frame, for the user terminal, into a number of forward-link (FL) subframes and a different number of reverse-link (RL) subframes. The SAN then transmits the FL subframes to the user terminal via a forward link of the satellite communication system, and subsequently receives the RL subframes from the user terminal via a reverse link of the satellite communication system.Type: ApplicationFiled: September 21, 2016Publication date: March 22, 2018Inventors: Venkatraman Rajagopalan, Jelena Damnjanovic, Qiang Wu
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Patent number: 9698962Abstract: Methods, systems, and devices are described for implementing timing advances in which a propagation delay may exceed a time period of a portion of a radio frame. In some examples, a transmitter may identify a timing advance indicating a time to initiate wireless uplink transmission of a subframe. Such a timing advance may compensate for a propagation delay between the transmitter and a receiver of the wireless uplink transmission. The timing advance may be applied as an integer component and a fractional component in relation to a duration of the subframe, to adjust the time to initiate the wireless uplink transmission of the subframe. The integer component may be used to adjust one or more subframe characteristics, and the fractional component that may be used to adjust the time to initiate the wireless uplink transmission of the subframe.Type: GrantFiled: May 6, 2015Date of Patent: July 4, 2017Assignee: QUALCOMM IncorporatedInventors: Venkatraman Rajagopalan, Srikant Jayaraman, Ruoheng Liu, Rajakumar Ebenezar Devairakkam
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Patent number: 9615344Abstract: Methods, systems, and devices are described for establishing a wireless communications link at an aircraft terminal (AT). An AT may determine a timing offset based on the propagation delay between the AT and a ground station, which in some cases may be more than 100 kilometers away. The AT may then transmit an initial access message to the ground station based on the determined timing offset. In some embodiments, the AT may receive an access response message from the ground station that includes a timing alignment value and adjust the timing offset based on this value. The AT may transmit a connection message to the ground station that includes AT location information. This information may be used by the ground station to facilitate beamforming.Type: GrantFiled: April 29, 2014Date of Patent: April 4, 2017Assignee: QUALCOMM IncorporatedInventors: Ruoheng Liu, June Namgoong, Hai Le, Srikant Jayaraman, Sunil Kamavaram, Rajakumar Ebenezar Devairakkam, Venkatraman Rajagopalan
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Publication number: 20150334707Abstract: Methods, systems, and devices are described for implementing timing advances in which a propagation delay may exceed a time period of a portion of a radio frame. In some examples, a transmitter may identify a timing advance indicating a time to initiate wireless uplink transmission of a subframe. Such a timing advance may compensate for a propagation delay between the transmitter and a receiver of the wireless uplink transmission. The timing advance may be applied as an integer component and a fractional component in relation to a duration of the subframe, to adjust the time to initiate the wireless uplink transmission of the subframe. The integer component may be used to adjust one or more subframe characteristics, and the fractional component that may be used to adjust the time to initiate the wireless uplink transmission of the subframe.Type: ApplicationFiled: May 6, 2015Publication date: November 19, 2015Inventors: Venkatraman Rajagopalan, Srikant Jayaraman, Ruoheng Liu, Rajakumar Ebenezar Devairakkam
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Publication number: 20150181544Abstract: Methods, systems, and devices are described for establishing a wireless communications link at an aircraft terminal (AT). An AT may determine a timing offset based on the propagation delay between the AT and a ground station, which in some cases may be more than 100 kilometers away. The AT may then transmit an initial access message to the ground station based on the determined timing offset. In some embodiments, the AT may receive an access response message from the ground station that includes a timing alignment value and adjust the timing offset based on this value. The AT may transmit a connection message to the ground station that includes AT location information. This information may be used by the ground station to facilitate beamforming.Type: ApplicationFiled: April 29, 2014Publication date: June 25, 2015Applicant: QUALCOMM IncorporatedInventors: Ruoheng Liu, June Namgoong, Hai Le, Srikant Jayaraman, Sunil Kamavaram, Rajakumar Ebenezar Devairakkam, Venkatraman Rajagopalan
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Publication number: 20150100318Abstract: A method for decoding a speech signal is described. The method includes obtaining a packet. The method also includes obtaining a previous lag value. The method further includes limiting the previous lag value if the previous lag value is greater than a maximum lag threshold. The method additionally includes disallowing an adjustment to a number of synthesized peaks if a combination of the number of synthesized peaks and an estimated number of peaks is not valid.Type: ApplicationFiled: October 4, 2013Publication date: April 9, 2015Applicant: QUALCOMM IncorporatedInventors: Venkatraman Rajagopalan, Venkatesh Krishnan, Alok K. Gupta
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Publication number: 20150085834Abstract: A method of wireless communication includes communicating with a base station using an extended special subframe. Communicating with the base station using the extended special subframe may be performed by disabling an uplink pilot time slot and an adjacent uplink subframe.Type: ApplicationFiled: December 12, 2013Publication date: March 26, 2015Applicant: QUALCOMM IncorporatedInventors: Ruoheng Liu, June Namgoong, Venkatraman Rajagopalan, Srikant Jayaraman
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Publication number: 20150085840Abstract: A method of wireless communication includes communicating with a base station using a special subframe that extends a guard period over an uplink pilot time slot and one or more disabled, adjacent uplink subframes. The method also includes associating a control information subframe with a specific downlink subframe while accounting for both cell radius extension and loss of the one or more disabled, adjacent uplink subframes used to communicate the extended special subframe.Type: ApplicationFiled: August 15, 2014Publication date: March 26, 2015Inventors: Ruoheng Liu, June Namgoong, Venkatraman Rajagopalan, Srikant Jayaraman