Patents by Inventor Sachin Vargantwar

Sachin Vargantwar 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: 8355364
    Abstract: The present invention provides a method and system for determining whether to accept an access request from an AT. In an embodiment of the invention, a base station receives an access request from an AT that is located within a sector served by the base station. In response to receiving the access request, the base station obtains the physical location of the AT within the sector. The base station then determines whether to accept the access request based on the physical location of the AT within the sector.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: January 15, 2013
    Assignee: Sprint Spectrum L.P.
    Inventors: Sachin Vargantwar, Deveshkumar Rai, Bhagwan Khanka, Sandeep Goyal, Anoop Goyal
  • Patent number: 8270969
    Abstract: Methods and systems for adjusting the access search window based on the movement of a mobile station (MS) are disclosed. The MS searches for pilot signals using a search window that has an initial size. At a first and second time, the MS determines its position. The MS then determines the distance between the position of the MS at the first time and the second time. When the distance is less than a threshold distance, the MS measures the strength of a pilot signal within the access search window and identifies one or more signal peaks within the access search window that are above a specified signal strength. Next, the MS modifies the access search window into one or more smaller access search windows. The one or more smaller access search windows collectively have a size that is smaller than the initial size.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: September 18, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Bhagwan Khanka, Sachin Vargantwar
  • Patent number: 8265660
    Abstract: Methods are described for handling an incoming call at a mobile switching center when the mobile station is currently in either an access state (in the process of making an outgoing call) or in a paging state (in the process of receiving an earlier incoming call). The mobile switching center waits until the mobile station transitions out of the access state or paging state into a traffic state. The mobile switching center sends an alert message to the mobile station alerting the user of the new incoming call. The mobile switching center handles the incoming call per a response to the alert message. One option would be to send the new incoming call to the user and drop the other incoming call (or the outgoing call). Another option would be to direct the incoming call to voice mail. In either case, the handling of the incoming call is per the user's direction, i.e., as dictated by the response message.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: September 11, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Sachin Vargantwar, Kamal Doshi, Anoop Goyal, Manoj Shetty, Siddharth Oroskar
  • Patent number: 8249611
    Abstract: Systems and methods for dynamically adjusting the size of an access search window are provided. In an embodiment a base station uses an access search window size, which is initially set to a default value, to determine whether to accept access requests from access terminals (ATs). The base station operates to accept access requests from ATs when the ATs are within the distance defined by the value of the access search window. The base station further operates to measure an amount of traffic for a sector of a wireless coverage area and change the value of the access search window size based on the amount of traffic on the sector.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: August 21, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Debasish Sarkar, Sachin Vargantwar, Siddharth T. Oroskar, Deveshkumar Rai, Bhagwan Khanka, Manoj Shetty, Sandeep Goyal, Anoop Goyal
  • Patent number: 8244255
    Abstract: Systems, methods, and computer-readable media for basing a handoff of a mobile device on its position within a coverage area of a source base transceiver station (BTS) are provided. Initially, embodiments involve recording threshold distances, associated with candidate BTSs neighboring the source BTS, and capturing pilot strength measurement messages (PSMM's) at each of the threshold distances. Upon establishing a connection to the source BTS, the position of the mobile device is monitored to detect a traversal of the threshold distances. Consequently, the mobile device reports a current PSMM for comparison against the captured PSMM's. If any messages correspond, a candidate BTS is selected for receiving the connection of the mobile device. Otherwise, the connection to the source BTS is maintained. Accordingly, the distance of the mobile device from the source BTS at which the handoff is invoked may vary based on a radial direction of the mobile device therefrom.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: August 14, 2012
    Assignee: Sprint Communications Company L.P.
    Inventors: Siddharth Oroskar, Sachin Vargantwar, Debasish Sarkar, Rajveen Narendran, Sreekar Marupaduga
  • Patent number: 8180381
    Abstract: A method and system for reducing an amount of traffic on a paging channel of a wireless communications system by holding a pending page message until a subsequent re-registration request and response cycle scheduled to occur within a threshold amount of time. A radio access network (RAN) may be configured to determine whether an amount of time to a next scheduled re-registration request and response cycle is less than a threshold amount. If the amount of time is less than the threshold amount, the RAN may delay transmission of the pending page message until the next re-registration request and response cycle. By sending the pending page message in a response to a scheduled re-registration request, or by sending the pending page as the response to a received re-registration request, the amount of traffic on the paging channel of the wireless communications system may be reduced.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: May 15, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Manoj Shetty, Sachin Vargantwar, Bhagwan Khanka, Deveshkumar Rai
  • Patent number: 8140069
    Abstract: The present invention provides a method and system for defining the mean opinion score (MOS) as a function of frame error rate (FER) and pilot signal strength. In an embodiment of the invention, an entity receives MOS scores that have been obtained using subjective tests for certain calls made within the network. Next, the entity receives FER and pilot signal strength samples that have been obtained for the calls for which MOS scores have been subjectively obtained. Finally, the entity calculates an equation for the MOS as a function of FER and pilot signal strength using a non-linear regression analysis.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: March 20, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Abhishek Lall, Ashish Bhan, Sachin Vargantwar, Robert Stedman, Mark Yarkosky
  • Patent number: 8107430
    Abstract: Disclosed herein is a method for selecting one or more capsules in which to include a traffic channel assignment message. The method may involve: (a) receiving a request from an access terminal to engage in a communication session; (b) making a determination as to whether or not the communication session is of a type that is designated for priority service; and (c) using the determination of whether or not the requested communication session is of a type that is designated for priority service as a basis for selecting one or more capsules in which to include the traffic channel assignment message. According to an exemplary embodiment, for priority communications, the TCA message is sent in all sectors identified in a route update message from the access terminal, and for non-priority communication sessions, control channel occupancy and pilot-signal strength to select sectors for the TCA message.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: January 31, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Debasish Sarkar, Manoj Shetty, Sachin Vargantwar, Siddharth Oroskar, Devesh Kumar Rai
  • Publication number: 20110230191
    Abstract: Methods and systems are provided causing a mobile station to, after experiencing a dropped call, originate a subsequent call via a coverage area different than that used for the first call. In an embodiment, a mobile station detects that, when it was engaged in the first call at a first location via a first wireless coverage area, the mobile station experienced the first call being dropped. When the mobile station subsequently attempts to originate a second call, the mobile station determines that its current location is within a threshold distance of the first location, and responsively attempts to originate the second call via a second wireless coverage area different from the first.
    Type: Application
    Filed: March 18, 2010
    Publication date: September 22, 2011
    Applicant: SPRINT SPECTRUM L.P.
    Inventors: Manoj Shetty, Sachin Vargantwar, Bhagwan Khanka, Deveshkumar Rai