Patents by Inventor Darshan Purohit

Darshan Purohit 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: 12375988
    Abstract: Systems, methods, and non-transitory media are provided for low latency handovers. An example method can include receiving, by a user terminal associated with a cell served by a satellite, a schedule of communications between the user terminal and one or more satellites, wherein the one or more satellites comprises the satellite and a different satellite, and wherein the schedule of communications is obtained by the user terminal from the satellite; requesting, based on the schedule, a handover from a beam of the satellite to a different beam of one of the satellite or the different satellite; performing the handover from the beam of the satellite to the different beam of the one of the satellite or the different satellite; and after the handover, transmitting, by the user terminal, one or more packets via the different beam of the one of the satellite or the different satellite.
    Type: Grant
    Filed: August 8, 2023
    Date of Patent: July 29, 2025
    Assignee: Space Exploration Technologies Corp.
    Inventors: Chen Chen, Pavel Chikulaev, Sergii Ziuzin, David Sacks, Peter J. Worters, Darshan Purohit, Yashodhan Dandekar, Vladimir Skuratovich, Andrei Pushkin, Phillip E. Barber
  • Publication number: 20250183997
    Abstract: In an embodiment, a method includes generating an initial network entry request. The method further includes in response to the initial network entry request, finding, via a user terminal, a satellite based on a search of a sky. The search of the sky comprises sequentially changing a beam pointing direction of the user terminal. The satellite is assigned to downlink to a geographic cell associated with the user terminal. The method includes generating an uplink radio frame associated with the initial network entry request at a particular portion of the uplink radio frame for the satellite.
    Type: Application
    Filed: February 3, 2025
    Publication date: June 5, 2025
    Inventors: Chen Chen, Darshan Purohit, Yashodhan Dandekar, Pavel Chikulaev, David Sacks, Peter J. Worters, Phillip E. Barber
  • Patent number: 12218742
    Abstract: In an embodiment, a user terminal includes a communication module (CM) configured to generate an initial network entry request; an antenna assembly configured to find, in response to the initial network entry request, a satellite based on a search of a sky. The search of the sky includes sequentially changing a beam pointing direction of the antenna assembly. The satellite is assigned to downlink to a geographic cell associated with the user terminal. The user terminal includes a media access control (MAC) layer component configured to generate an uplink radio frame including a random access channel (RACH) request associated with the initial network entry request at a particular portion of the uplink radio frame for the satellite.
    Type: Grant
    Filed: August 4, 2023
    Date of Patent: February 4, 2025
    Assignee: Space Exploration Technologies Corp.
    Inventors: Chen Chen, Darshan Purohit, Yashodhan Dandekar, Pavel Chikulaev, David Sacks, Peter J. Worters, Phillip E. Barber
  • Patent number: 11949496
    Abstract: Systems, methods, and non-transitory media are provided for low latency handovers. An example method can include receiving, by a satellite, a schedule of communications between the satellite and one or more gateways; requesting, based on the schedule, a handover from a link between the satellite and a gateway to a different link between the satellite and the gateway or a different gateway; prior to a completion of the handover, processing packets bicasted over the link between the satellite and the gateway and the different link between the satellite and the gateway or the different gateway; performing the handover from the link between the satellite and the gateway to the different link between the satellite and the gateway or the different gateway; and after the handover, transmitting, by the satellite, one or more packets via the different link between the satellite and the gateway or the different gateway.
    Type: Grant
    Filed: June 2, 2021
    Date of Patent: April 2, 2024
    Assignee: Space Exploration Technologies Corp.
    Inventors: Chen Chen, Pavel Chikulaev, Sergii Ziuzin, David Sacks, Peter J. Worters, Darshan Purohit, Yashodhan Dandekar, Vladimir Skuratovich, Andrei Pushkin, Phillip E. Barber
  • Publication number: 20240031892
    Abstract: Systems, methods, and non-transitory media are provided for low latency handovers. An example method can include receiving, by a user terminal associated with a cell served by a satellite, a schedule of communications between the user terminal and one or more satellites, wherein the one or more satellites comprises the satellite and a different satellite, and wherein the schedule of communications is obtained by the user terminal from the satellite; requesting, based on the schedule, a handover from a beam of the satellite to a different beam of one of the satellite or the different satellite; performing the handover from the beam of the satellite to the different beam of the one of the satellite or the different satellite; and after the handover, transmitting, by the user terminal, one or more packets via the different beam of the one of the satellite or the different satellite.
    Type: Application
    Filed: August 8, 2023
    Publication date: January 25, 2024
    Inventors: Chen Chen, Pavel Chikulaev, Sergii Ziuzin, David Sacks, Peter J. Worters, Darshan Purohit, Yashodhan Dandekar, Vladimir Skuratovich, Andrei Pushkin, Phillip E. Barber
  • Publication number: 20230396324
    Abstract: In an embodiment, a user terminal includes a communication module (CM) configured to generate an initial network entry request; an antenna assembly configured to find, in response to the initial network entry request, a satellite based on a search of a sky. The search of the sky includes sequentially changing a beam pointing direction of the antenna assembly. The satellite is assigned to downlink to a geographic cell associated with the user terminal. The user terminal includes a media access control (MAC) layer component configured to generate an uplink radio frame including a random access channel (RACH) request associated with the initial network entry request at a particular portion of the uplink radio frame for the satellite.
    Type: Application
    Filed: August 4, 2023
    Publication date: December 7, 2023
    Inventors: Chen Chen, Darshan Purohit, Yashodhan Dandekar, Pavel Chikulaev, David Sacks, Peter J. Worters, Phillip E. Barber
  • Patent number: 11757526
    Abstract: In an embodiment, a user terminal includes a connection manager component configured to generate an initial network entry request; an antenna assembly communicatively coupled to the connection manager and configured, in response to the initial network entry request, to find a satellite based on a search of a sky, wherein the satellite comprises a satellite assigned to downlink to a geographic cell associated with the user terminal; and a media access control (MAC) layer component communicatively coupled to the connection manager, the MAC layer component configured to generate an uplink radio frame including a random access channel (RACH) request associated with the initial network entry request at a particular portion of the uplink radio frame for the satellite, wherein the particular portion is selected by the MAC layer component from among a plurality of portions of the uplink radio frame.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: September 12, 2023
    Assignee: Space Exploration Technologies Corp.
    Inventors: Chen Chen, Darshan Purohit, Yashodhan Dandekar, Pavel Chikulaev, David Sacks, Peter J. Worters, Phillip E. Barber
  • Patent number: 11729684
    Abstract: Systems, methods, and non-transitory media are provided for low latency handovers. An example method can include receiving, by a user terminal associated with a cell served by a satellite, a schedule of communications between the user terminal and one or more satellites; requesting, based on the schedule, a handover from a beam of the satellite to a different beam of one of the satellite or a different satellite; processing packets transmitted over the beam of the satellite and/or the different beam of the one of the satellite or the different satellite; performing the handover from the beam of the satellite to the different beam of the one of the satellite or the different satellite; and after the handover, transmitting, by the user terminal, one or more packets via the different beam of the one of the satellite or the different satellite.
    Type: Grant
    Filed: June 2, 2021
    Date of Patent: August 15, 2023
    Assignee: Space Exploration Technologies Corp.
    Inventors: Chen Chen, Pavel Chikulaev, Sergii Ziuzin, David Sacks, Peter J. Worters, Darshan Purohit, Yashodhan Dandekar, Vladimir Skuratovich, Andrei Pushkin, Phillip E. Barber
  • Patent number: 10728814
    Abstract: A method for upgrading an access controller that controls and coordinates a plurality of radio nodes (RNs) each associated with a cell in a cluster of cells belonging to a radio access network includes initializing a new access controller. The new access controller is to replace a current access controller currently controlling and coordinating the plurality of RNs cell in the cluster. A most lightly loaded one of the plurality of RNs is identified. All UEs currently attached to the identified RN is caused to be handed off to a neighboring cell in the cluster. After all the UEs have been handed-off from the identified RN, the identified RN is rebooted so that it is being controlled and coordinated by the new access controller. The steps of causing the UEs to be handed-off and rebooting the identified RN are repeated for a second one of the plurality of RNs.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: July 28, 2020
    Assignee: Corning Optical Communications LLC
    Inventor: Darshan Purohit
  • Publication number: 20190069206
    Abstract: A method for upgrading an access controller that controls and coordinates a plurality of radio nodes (RNs) each associated with a cell in a cluster of cells belonging to a radio access network includes initializing a new access controller. The new access controller is to replace a current access controller currently controlling and coordinating the plurality of RNs cell in the cluster. A most lightly loaded one of the plurality of RNs is identified. All UEs currently attached to the identified RN is caused to be handed off to a neighboring cell in the cluster. After all the UEs have been handed-off from the identified RN, the identified RN is rebooted so that it is being controlled and coordinated by the new access controller. The steps of causing the UEs to be handed-off and rebooting the identified RN are repeated for a second one of the plurality of RNs.
    Type: Application
    Filed: October 31, 2018
    Publication date: February 28, 2019
    Inventor: Darshan Purohit
  • Patent number: 10129805
    Abstract: A method for upgrading an access controller that controls and coordinates a plurality of radio nodes (RNs) each associated with a cell in a cluster of cells belonging to a radio access network includes initializing a new access controller. The new access controller is to replace a current access controller currently controlling and coordinating the plurality of RNs cell in the cluster. A most lightly loaded one of the plurality of RNs is identified. All UEs currently attached to the identified RN is caused to be handed off to a neighboring cell in the cluster. After all the UEs have been handed-off from the identified RN, the identified RN is rebooted so that it is being controlled and coordinated by the new access controller. The steps of causing the UEs to be handed-off and rebooting the identified RN are repeated for a second one of the plurality of RNs.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: November 13, 2018
    Assignee: Spidercloud Wireless, Inc.
    Inventor: Darshan Purohit
  • Patent number: 9642106
    Abstract: Systems and methods are provided for resolving Primary Scrambling Code (PSC) ambiguity. A radio link having the same PSC as that reported by user equipment (UE) may be created on some or all internal cells which are chosen based on radio frequency (RF) proximity to a serving cell of the UE or one or more iterations of a PSC resolution set selection process. If the UE is reporting the PSC of one of these cells, the UE and a Node Bs will be able to successfully complete a synchronization procedure to add one of the radio links to the UE's active set, while any remaining created radio links can be deleted. After a certain number of successful radio link additions, the combination of the PSC and active set may be considered to be resolved, therefore, negating a need to resolve the PSC in subsequent soft handover requests.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: May 2, 2017
    Assignee: SpiderCloud Wireless, Inc.
    Inventor: Darshan Purohit
  • Publication number: 20160269954
    Abstract: A method for upgrading an access controller that controls and coordinates a plurality of radio nodes (RNs) each associated with a cell in a cluster of cells belonging to a radio access network includes initializing a new access controller. The new access controller is to replace a current access controller currently controlling and coordinating the plurality of RNs cell in the cluster. A most lightly loaded one of the plurality of RNs is identified. All UEs currently attached to the identified RN is caused to be handed off to a neighboring cell in the cluster. After all the UEs have been handed-off from the identified RN, the identified RN is rebooted so that it is being controlled and coordinated by the new access controller. The steps of causing the UEs to be handed-off and rebooting the identified RN are repeated for a second one of the plurality of RNs.
    Type: Application
    Filed: March 14, 2016
    Publication date: September 15, 2016
    Inventor: Darshan Purohit
  • Publication number: 20140287759
    Abstract: Systems and methods are provided for resolving Primary Scrambling Code (PSC) ambiguity. A radio link having the same PSC as that reported by user equipment (UE) may be created on some or all internal cells which are chosen based on radio frequency (RF) proximity to a serving cell of the UE or one or more iterations of a PSC resolution set selection process. If the UE is reporting the PSC of one of these cells, the UE and a Node Bs will be able to successfully complete a synchronization procedure to add one of the radio links to the UE's active set, while any remaining created radio links can be deleted. After a certain number of successful radio link additions, the combination of the PSC and active set may be considered to be resolved, therefore, negating a need to resolve the PSC in subsequent soft handover requests.
    Type: Application
    Filed: March 21, 2013
    Publication date: September 25, 2014
    Applicant: SpiderCloud Wireless, Inc.
    Inventor: Darshan Purohit
  • Publication number: 20110130144
    Abstract: Methods, devices, and computer program products facilitate various handoff operations to/from a network. A self-configuring and self-optimizing topology discovery operation provides detailed information regarding the various radio nodes that are internal and external to the network. This information is utilized to construct a plurality of neighbor lists that identify multiple tiers of neighboring radio nodes of the network. The neighbor lists and the measurements obtained from the user equipment within the network provide up-to-date information that facilitates various types of handoff operations.
    Type: Application
    Filed: November 30, 2010
    Publication date: June 2, 2011
    Inventors: Brett Schein, Yashwanth Hemaraj, Murari Srinivasan, Darshan Purohit