Patents by Inventor Prabhakar R. Chitrapu

Prabhakar R. Chitrapu 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: 20160205150
    Abstract: Method and apparatus delivering voice/data services within a piconet operating over a limited range or over a WLAN communicating with 3GPP devices by reformatting data into IP format before delivering to the WLAN. The service is short message service (SMS). Upon receipt of an SMS message, relevant routing information is retrieved. A PDGW address for the SMS message is identified and is sent to the PDGW address which identifies the WLAN user equipment (UE) for receiving the SMS and reformats the SMS message into IP format (text or encapsulation) for delivery to the UE. A protocol architecture is provided for SMS delivery over WLANs, in particular, for UMTS/CDMA based SMS over WLAN through two alternative mechanisms, i.e., SMS tunneling and SMS proxy, for protocols for the delivery of SMS across the WLAN. The invention enhances standard 802.11 in the context of UMTS and CDMA 2000; as well as other scenarios.
    Type: Application
    Filed: March 22, 2016
    Publication date: July 14, 2016
    Applicant: InterDigital Technology Corporation
    Inventors: Kamel M. Shaheen, Prabhakar R. Chitrapu, Brian G. Kiernan, Debashish Purkayastha
  • Patent number: 9386540
    Abstract: A method and apparatus for power control in a wireless communication involves establishing at least two orthogonal sub-channels within a channel for communication and controlling transmitted power in each sub-channel independently.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: July 5, 2016
    Assignee: InterDigital Technology Corporation
    Inventors: Prabhakar R. Chitrapu, Behrouz Aghili, Stephen G. Dick
  • Publication number: 20160183324
    Abstract: Systems, apparatuses and methods for bandwidth management, aggregation and internet protocol (“IP”) flow mobility (“IFOM”) across multiple-access technologies are provided. Included is a method that includes selecting, from a packet data network (“PDN”) connection formed through a plurality of access systems communicatively coupled with a wireless transmit and/or receive unit (“WTRU”), an access system over which to transport a flow of internet protocol (“IP”) traffic to and/or from the WTRU. The method may also include sending, to the WTRU, a request to associate the flow of IP traffic with the selected access system.
    Type: Application
    Filed: February 29, 2016
    Publication date: June 23, 2016
    Inventors: Prabhakar R. Chitrapu, Kushanava Laha, John L. Tomici, John Cartmell, Kenneth F. Lynch, Alexander Reznik, Oscar Lopez-Torres, Chunxuan Ye, Dale N. Seed, Michelle Perras
  • Patent number: 9357390
    Abstract: Methods and apparatus for communicating with the Internet via a gateway are disclosed. The gateway may be a Radio Access Network (RAN) gateway. The gateway may communicate data with at least one user equipment (UE). The gateway may route the data via one or more interfaces. The data may be routed by bypassing a core network.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: May 31, 2016
    Assignee: Signal Trust for Wireless Innovation
    Inventors: Prabhakar R. Chitrapu, Narayan Parappil Menon, Fatih M. Ozluturk, Brian Gregory Kiernan
  • Patent number: 9344224
    Abstract: A method and apparatus are described. A wireless transmit/receive unit (WTRU) generates data bits and piggybacked acknowledgement/non-acknowledgement (PAN) bits and generates a plurality of symbols based on the data bits and the PAN bits. Each symbol of the plurality of symbols represents a plurality of bits and has a least significant bit (LSB) position, and no PAN bits are present in the LSB position of each of the plurality of symbols. The plurality of symbols are transmitted.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: May 17, 2016
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Behrouz Aghili, Marian Rudolf, Prabhakar R. Chitrapu, Stephen G. Dick
  • Patent number: 9332415
    Abstract: Method and apparatus delivering voice/data services within a piconet operating over a limited range or over a WLAN communicating with 3GPP devices by reformatting data into IP format before delivering to the WLAN. The service is short message service (SMS). Upon receipt of an SMS message, relevant routing information is retrieved. A PDGW address for the SMS message is identified and is sent to the PDGW address which identifies the WLAN user equipment (UE) for receiving the SMS and reformats the SMS message into IP format (text or encapsulation) for delivery to the UE. A protocol architecture is provided for SMS delivery over WLANs, in particular, for UMTS/CDMA based SMS over WLAN through two alternative mechanisms, i.e., SMS tunneling and SMS proxy, for protocols for the delivery of SMS across the WLAN. The invention enhances standard 802.11 in the context of UMTS and CDMA 2000; as well as other scenarios.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: May 3, 2016
    Assignee: InterDigital Technology Corporation
    Inventors: Kamel M. Shaheen, Prabhakar R. Chitrapu, Brian G. Kiernan, Debashish Purkayastha
  • Patent number: 9313766
    Abstract: A BWM controller may be provide the capability to combine a lower speed, wide area network (WAN) that may have connectivity with an ONW that may have intermittent connectivity. This may be done, for example, to generate a multi-connection service that may provide connectivity that may take advantage of occasional high-speed ONW connection events.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: April 12, 2016
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Robert A. DiFazio, Prabhakar R. Chitrapu
  • Patent number: 9301156
    Abstract: A method and apparatus determines a physical location of a wireless infrastructure device. At least one coarse location data from an associated terminal device is determined. Additional coarse location data are stored and accumulated. The device location is considered accurate by determining that enough received coarse location data has been received.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: March 29, 2016
    Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Robert A. DiFazio, Prabhakar R. Chitrapu, John M. McNally, Narayan P. Menon, James Nolan, Fred Schreider
  • Publication number: 20160088574
    Abstract: A method and apparatus for power control in a wireless communication involves establishing at least two orthogonal sub-channels within a channel for communication and controlling transmitted power in each sub-channel independently.
    Type: Application
    Filed: December 7, 2015
    Publication date: March 24, 2016
    Applicant: InterDigital Technology Corporation
    Inventors: Prabhakar R. Chitrapu, Behrouz Aghili, Stephen G. Dick
  • Publication number: 20160081034
    Abstract: A method and apparatus for power control for distributed wireless communication is disclosed including one or more power control loops associated with a wireless transmit/receive unit (WTRU). Each power control loop may include open loop power control or closed loop power control. A multi-phase power control method is also disclosed with each phase representing a different time interval and a WTRU sends transmissions at different power levels to different set of node-Bs or relay stations during different phases to optimize communications.
    Type: Application
    Filed: November 19, 2015
    Publication date: March 17, 2016
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Zinan Lin, Alexander Reznik, Prabhakar R. Chitrapu, Mihaela C. Beluri, Eldad M. Zeira, Philip J. Pietraski, Sung-Hyuk Shin, Gregg A. Charlton
  • Patent number: 9276661
    Abstract: A method and apparatus for cooperation in wireless communications. Cooperation is considered among a number of network elements, including at least one wireless transmit-receive unit, at least one relay station, and at least one base station.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: March 1, 2016
    Assignee: InterDigital Technology Corporation
    Inventors: Sana Sfar, Alexander Reznik, Prabhakar R. Chitrapu, Zinan Lin, Mohammed Sammour, Ana Lucia A. Pinheiro, Mihaela C. Beluri, Chunxuan Ye, Yogendra C. Shah, Gregg A. Charlton, Guodong Zhang, Khushali N. Manseta, Ruiyuan Hu
  • Patent number: 9232416
    Abstract: A method and apparatus for power control for distributed wireless communication is disclosed including one or more power control loops associated with a wireless transmit/receive unit (WTRU). Each power control loop may include open loop power control or closed loop power control. A multi-phase power control method is also disclosed with each phase representing a different time interval and a WTRU sends transmissions at different power levels to different set of node-Bs or relay stations during different phases to optimize communications.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: January 5, 2016
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Zinan Lin, Alexander Reznik, Prabhakar R. Chitrapu, Mihaela C. Beluri, Eldad M. Zeira, Philip J. Pietraski, Sung-Hyuk Shin, Gregg A. Charlton
  • Patent number: 9210663
    Abstract: A method and apparatus for power control in a wireless communication involves establishing at least two orthogonal sub-channels within a channel for communication and controlling transmitted power in each sub-channel independently.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: December 8, 2015
    Assignee: InterDigital Technology Corporation
    Inventors: Prabhakar R. Chitrapu, Behrouz Aghili, Stephen G. Dick
  • Patent number: 9198021
    Abstract: The implementation of Local IP Access (LIPA), “Extended” LIPA (ELIPA), and Selected IP Traffic Offload (SIPTO) for the design of a “Converged Gateway” (CGW) are disclosed. The gateway system may provide various features such as femtocell access to local networks, public Internet, and private service provider networks.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: November 24, 2015
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: John L. Tomici, Prabhakar R. Chitrapu, John Cartmell, Rocco Di Girolamo, Jean-Louis Gauvreau, Aravind Kamarajugadda, Chunxuan Ye, Kushanava Laha, Reeteshkumar Varshney, Nicholas J. Podias, Arty Chandra, Alpaslan Y. Demir, Martino Freda, Scott C. Hergenhan, Dale N. Seed, Michael F. Starsinic, Athmane Touag, Onkarnath Upadhyay, Paul L. Russell
  • Publication number: 20150312914
    Abstract: The invention involves utilizing pieces of disjoint spectral blocks. In one embodiment, a frequency division duplex approach is used, where each spectral block is utilized solely for either uplink or downlink communications. In another embodiment, a time division duplex approach is used, where each spectral block is time divided and uplink and downlink communications are assigned to different time slots within the same spectral blocks. In another embodiment, a code division duplex approach is utilized, where uplink and downlink communications are assigned different codes/hopping patterns within a same spectral block.
    Type: Application
    Filed: July 7, 2015
    Publication date: October 29, 2015
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventor: Prabhakar R. Chitrapu
  • Publication number: 20150257024
    Abstract: Control and/or management plane interactions may be implemented between one or more wireless backhaul links and respective associated access and/or core networks. The control and/or management plane interactions may be implemented in accordance with self-optimization functionalities and may be implemented to perform radio resource management (RRM) for the one or more wireless backhaul links. Packet-based synchronization and/or delay measurement techniques may be implemented to determine estimated values for wireless backhaul induced delay. The delay estimation information may be used by one or more devices in a wireless communications network, such as a packet data network gateway (PGW), a small cell gateway (SC GW), or an access point (AP), such as a small cell access point (SC AP). Delay estimation for wireless backhaul links may be implemented in accordance with PTP message replication and/or side-channel signaling, dual synchronization with GPS and PTP signaling, and/or timestamping.
    Type: Application
    Filed: September 17, 2013
    Publication date: September 10, 2015
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Akash Baid, Prabhakar R. Chitrapu, John L. Tomici, John Cartmell
  • Patent number: 9130693
    Abstract: A method and apparatus is used for generating a perfectly random secret key between two or more transceivers in a wireless communication network. In a point-to-point system, both transceivers produce an estimate of the channel impulse response (CIR) based on the received radio signal. The CIR estimation is synchronized and may include error correction and detection. A long secret key of bits is generated from a digitized version of the CIR estimate, from which a perfectly secret encryption key is derived by privacy amplification.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: September 8, 2015
    Assignee: InterDigital Technology Corporation
    Inventors: Alexander Reznik, Akinlolu Oloruntosi Kumoluyi, Guodong Zhang, Prabhakar R. Chitrapu, Gregory S. Sternberg, Yogendra C. Shah, Alain Charles Louis Briancon, Chunxuan Ye
  • Patent number: 9083436
    Abstract: The invention involves utilizing pieces of disjoint spectral blocks. In one embodiment, a frequency division duplex approach is used, where each spectral block is utilized solely for either uplink or downlink communications. In another embodiment, a time division duplex approach is used, where each spectral block is time divided and uplink and downlink communications are assigned to different time slots within the same spectral blocks. In another embodiment, a code division duplex approach is utilized, where uplink and downlink communications are assigned different codes/hopping patterns within a same spectral block.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: July 14, 2015
    Assignee: InterDigital Technology Corporation
    Inventor: Prabhakar R. Chitrapu
  • Publication number: 20150195858
    Abstract: Systems, methods, and instrumentalities are disclosed to implement hierarchical policies for local networks. In one representative method, a first local node may establish a dedicated local IP access (LIPA) packet data network (PDN) connection for a local service provided via a local network. The method may include responsive to a request for access to the local service, the first local node receiving a quality of service (QoS) requirement for the requested local service; sending, to a second local node, a dedicated bearer request with a specified QoS level based on a global policy and network-information specific to the local network; and receiving a dedicated bearer response with the specified QoS level.
    Type: Application
    Filed: June 17, 2013
    Publication date: July 9, 2015
    Inventors: Hao Jin, John L Tomici, Prabhakar R Chitrapu, Alexander Reznik, John Cartmell, Bartosz Balazinski, Mario Hudon, Samir Ferdi
  • Publication number: 20150094028
    Abstract: Methods and apparatus for communicating with the Internet via a gateway are disclosed. The gateway may be a Radio Access Network (RAN) gateway. The gateway may communicate data with at least one user equipment (UE). The gateway may route the data via one or more interfaces. The data may be routed by bypassing a core network.
    Type: Application
    Filed: November 24, 2014
    Publication date: April 2, 2015
    Applicant: Signal Trust for Wireless Innovation
    Inventors: Prabhakar R. Chitrapu, Narayan Parappil Menon, Fatih M. Ozluturk, Brian Gregory Kiernan