Patents by Inventor Shankar Somasundaram

Shankar Somasundaram 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).

  • METHOD AND APPARATUS FOR RANDOM ACCESS IN MULTICARRIER WIRELESS COMMUNICATIONS
    Publication number: 20140293915
    Abstract: Methods and apparatus for random access in multicarrier wireless communications are disclosed. Methods and apparatus are provided for physical random access channel (PRACH) resource signaling, PRACH resource handling, preamble and PRACH resource selection, random access response (RAR) reception, preamble retransmission, and transmission and reception of subsequent messages. A method for maintaining an allowed multicarrier uplink (UL) random access channel (RACH) configuration set by adding an UL carrier to the allowed RACH configuration set provided that a triggering event occurs and performing a random access (RA) procedure using the allowed RACH configuration set. A method for sending data in multicarrier wireless communications by determining a set of available UL carriers and selecting an UL carrier from the set of available UL carriers.
    Type: Application
    Filed: June 5, 2014
    Publication date: October 2, 2014
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Ghyslain Pelletier, Stephen E. Terry, Paul Marinier, Guodong Zhang, Peter S. Wang, Jin Wang, Shankar Somasundaram, Jean-Louis Gauvreau, Charles A. Dennean, Erdem Bala, Afshin Haghighat
  • METHOD AND APPARATUS FOR LTE RADIO LINK FAILURE DETERMINIATION IN DRX MODE
    Publication number: 20140273872
    Abstract: A method and apparatus for detecting radio link failure (RLF) in a wireless transmit receive unit (WTRU) includes the WTRU performing a series of radio link measurements during a discontinuous reception (DRX) on-duration, comparing each of the series of radio link measurements to a threshold, and determining that the series of radio link measurements indicates an out-of-synch condition.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 18, 2014
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Joseph S. Levy, Charles A. Dennean, Stephen E. Terry, Peter S. Wang, Jean-Louis Gauvreau, Shankar Somasundaram, Ulises Olvera-Hernandez, Paul Marinier, Guodong Zhang
  • METHOD AND APPARATUS FOR HANDLING SYSTEM INFORMATION CHANGE
    Publication number: 20140254501
    Abstract: A method and apparatus for handling system information change. When the system information changes, a wireless transmit/receive unit (WTRU) may be running a procedure. Depending on the nature of the system information, the WTRU may not need to interrupt the procedure to update the system information.
    Type: Application
    Filed: June 3, 2013
    Publication date: September 11, 2014
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Shankar Somasundaram, Jean-Louis Gauvreau, Peter S. Wang, Paul Marinier, Ulises Olvera-Hernandez
  • RRC MESSAGES AND PROCEDURES
    Publication number: 20140243003
    Abstract: A method and apparatus for radio resource control (RRC) messaging. A method in a wireless communication system includes receiving, at a wireless transmit/receive unit (WTRU) an RRC change command including a plurality of commands from a Node B and receiving, at the Node B, an RRC change response from the WTRU, wherein the RRC change command includes a command for performing a measurement gap configuration procedure and a command for performing a measurement gap activation procedure.
    Type: Application
    Filed: March 28, 2014
    Publication date: August 28, 2014
    Applicant: InterDigital Technology Corporation
    Inventors: Shankar Somasundaram, Ulises Olvera-Hernandez
  • METHOD AND APPARATUS FOR MONITORING FOR A RADIO LINK FAILURE
    Publication number: 20140233396
    Abstract: Methods and apparatus are described for monitoring for a radio link failure in a long term evolution-advanced (LTE-A) system operated with carrier aggregation. The methods include criteria for determining radio link failure, recovery events, and the actions that a wireless transmit/receive unit (WTRU) may take upon the occurrence of such events.
    Type: Application
    Filed: April 25, 2014
    Publication date: August 21, 2014
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Paul Marinier, Stephen E. Terry, Jean-Louis Gauvreau, Shankar Somasundaram, Peter S. Wang, Ghyslain Pelletier, Marian Rudolf
  • Method and apparatus for LTE radio link failure determination in DRX mode
    Patent number: 8798615
    Abstract: A method and apparatus for detecting radio link failure (RLF) in a wireless transmit receive unit (WTRU) includes the WTRU performing a series of radio link measurements during a discontinuous reception (DRX) on-duration, comparing each of the series of radio link measurements to a threshold, and determining that the series of radio link measurements indicates an out-of-synch condition.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: August 5, 2014
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Joseph S. Levy, Charles A. Dennean, Stephen E. Terry, Peter S. Wang, Jean-Louis Gauvreau, Shankar Somasundaram, Ulises Olvera-Hernandez, Paul Marinier, Guodong Zhang
  • CELL RESELECTION AND HANDOVER WITH MULTIMEDIA BROADCAST/MULTICAST SERVICE
    Publication number: 20140204829
    Abstract: A method and apparatus for providing wireless communication services, (e.g., multimedia broadcast multicast services (MBMS)), are disclosed. A wireless transmit/receive unit (WTRU) detects a plurality of target cell evolved Node-Bs (eNodeBs) that neighbor a serving cell eNodeB. The WTRU evaluates cell reselection criteria and determines a neighboring target cell eNodeB to reselect. The WTRU receives and reads master information block (MIB) and system information messages of the neighboring target cell eNodeB, and confirms that the determined neighboring target cell eNodeB is not part of a multimedia broadcast single frequency network (MBSFN). The WTRU identifies the neighboring target cell eNodeB to the serving cell eNodeB.
    Type: Application
    Filed: March 20, 2014
    Publication date: July 24, 2014
    Applicant: InterDigital Technology Corporation
    Inventors: Jin Wang, Shankar Somasundaram, Mohammed Sammour, Ulises Olvera-Hernandez, Rajat P. Mukherjee, James M. Miller
  • METHOD FOR INTER-RADIO ACCESS TECHNOLOGY CELL RESELECTION
    Publication number: 20140206355
    Abstract: A method for performing cell reselection first determines a current cell selection quality value. The cell selection quality value is compared to a predetermined threshold. Measurements of neighboring cells are taken if the cell selection quality value is less than or equal to the predetermined threshold. Measurements can be taken of intra-frequency cells, inter-frequency cells, and inter-radio access technology cells. If a neighboring cell is found that is better than the current cell based on the measurements, then the better neighbor cell is reselected to.
    Type: Application
    Filed: March 24, 2014
    Publication date: July 24, 2014
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Diana Pani, Mohammed Sammour, Shankar Somasundaram, Jin Wang, Rajat P. Mukherjee
  • METHOD AND APPARATUS OF SIGNALING AND PROCEDURE TO SUPPORT UPLINK POWER LEVEL DETERMINATION
    Publication number: 20140192747
    Abstract: Method and apparatus are disclosed for determining a physical uplink power level for transmissions on a physical uplink channel. In one embodiment, a random access channel (RACH) uplink message is transmitted. The RACH uplink message includes a RACH message power level and/or a downlink pathloss figure. A downlink message including a power offset value is received. The physical uplink power level is set for transmissions on the physical uplink channel based on the power offset value. In another embodiment, a RACH uplink message is transmitted and a downlink message including a relative power offset value is received. The physical uplink power level for transmissions on the physical uplink channel is then set based on the relative power off set value.
    Type: Application
    Filed: March 12, 2014
    Publication date: July 10, 2014
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Jin Wang, Joseph S. Levy, Stephen E. Terry, Ulises Olvera-Hernandez, Shankar Somasundaram
  • APPARATUS TO ENABLE FALLBACK TO CIRCUIT SWITCHED DOMAIN FROM PACKET SWITCHED DOMAIN
    Publication number: 20140192772
    Abstract: An apparatus is used to perform a Circuit Switched (CS) fallback in wireless communications. The Non-Access Stratum (NAS) of the apparatus determines whether to perform a CS fallback based on an Internet Protocol (IP) Multimedia Subsystem (IMS) registration status, and sends a service request indicating a request to perform the CS fallback when the WTRU is attached to a CS domain. The apparatus also includes an Access Stratum (AS) that receives the CS service request from the NAS, sends an indication of the CS service request in a Radio Resource Control (RRC) message to an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN), wherein the RRC message includes CS service information, and receives a handover command in response to the CS service request.
    Type: Application
    Filed: November 1, 2013
    Publication date: July 10, 2014
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Shankar Somasundaram, Mohammed Sammour, Ulises Olvera-Hernandez, Rajat Mukherjee, Catherine Livet
  • METHOD AND APPARATUS FOR SUPPORTING UPLINK STARVATION AVOIDANCE IN A LONG TERM EVOLUTION SYSTEM
    Publication number: 20140185448
    Abstract: A method and apparatus for uplink (UL) starvation avoidance includes determining a current buffer status information. The current buffer status information is reported to an evolved Node B (eNB). A grant that includes a determination of a number of tokens a wireless transmit/receive unit (WTRU) may accumulate is received from the eNB.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 3, 2014
    Applicant: InterDigital Technology Corporation
    Inventors: Peter S. Wang, Jin Wang, Stephen E. Terry, Shankar Somasundaram, Mohammed Sammour
  • Home (e)Node-B with new functionality
    Patent number: 8769308
    Abstract: A wireless communication device is configured as an in-home node-B (H(e)NB). The H(e)NB is configured to perform a locking function to control modification of carrier and user controlled parameters, and also configured to detect a change in location.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: July 1, 2014
    Assignee: Interdigital Technology Corporation
    Inventors: Rajat P. Mukherjee, Shankar Somasundaram, Ulises Olvera-Hernandez, Yogendra C. Shah, Prabhakar R. Chitrapu, Inhyok Cha
  • Method and apparatus for random access in multicarrier wireless communications
    Patent number: 8767585
    Abstract: Methods and apparatus for random access in multicarrier wireless communications are disclosed. Methods and apparatus are provided for physical random access channel (PRACH) resource signaling, PRACH resource handling, preamble and PRACH resource selection, random access response (RAR) reception, preamble retransmission, and transmission and reception of subsequent messages. A method for maintaining an allowed multicarrier uplink (UL) random access channel (RACH) configuration set by adding an UL carrier to the allowed RACH configuration set provided that a triggering event occurs and performing a random access (RA) procedure using the allowed RACH configuration set. A method for sending data in multicarrier wireless communications by determining a set of available UL carriers and selecting an UL carrier from the set of available UL carriers.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: July 1, 2014
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Ghyslain Pelletier, Stephen E. Terry, Paul Marinier, Guodong Zhang, Peter S. Wang, Jin Wang, Shankar Somasundaram, Jean-Louis Gauvreau, Charles A. Dennean, Erdem Bala, Afshin Haghighat
  • METHOD AND APPARATUS TO IMPLEMENT SECURITY IN A LONG TERM EVOLUTION WIRELESS DEVICE
    Publication number: 20140181899
    Abstract: A wireless transmit receive unit (WTRU) is configured to receive unciphered and ciphered messages. The unciphered messages include identity requests, authentication requests, non-access stratum (NAS) security mode commands and tracking area update responses. The ciphered messages may come from the NAS and a Radio Resource Controller (RRC). The messages are ciphered using security keys.
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Rajat P. Mukherjee, Peter S. Wang, Mohammed Sammour, Shankar Somasundaram
  • CONTROL CHANNEL SIGNALING AND ACQUISITION FOR CARRIER AGGREGATION
    Publication number: 20140179328
    Abstract: A method and apparatus for handling a control channel for carrier aggregation in wireless communications. The method includes determining which component carrier to listen to, detecting the downlink control channel, processing mapping information related to downlink and uplink transmissions and operating discontinuous reception with respect to carrier aggregation. The method also includes detecting a component carrier, determining the component carrier type and locating the anchor component carrier, if necessary, where the anchor component carrier carries the carrier aggregation information.
    Type: Application
    Filed: February 26, 2014
    Publication date: June 26, 2014
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Erdem Bala, Guodong Zhang, Philip J. Pietraski, Sung-Hyuk Shin, Peter S. Wang, Marian Rudolf, Joseph S. Levy, Donald M. Grieco, Shankar Somasundaram, Kyle Pan
  • RADIO LINK CONTROL RESET USING RADIO RESOURCE CONTROL SIGNALING
    Publication number: 20140161074
    Abstract: A method and apparatus are described for implementing a reset procedure for radio link control (RLC) using radio resource control (RRC) signaling. A wireless transmit/receive unit (WTRU) receives a request for RLC reset. A processor at the WTRU comprises a RRC entity and a RLC entity. The RRC entity receives the request for a RLC reset in a radio resource control message. The RLC entity reassembles RLC service data units (SDUs) from any protocol data units (PDUs) that are received out of sequence at a receiving side of the RLC entity. The reassembled SDUs are delivered in sequence to a packet data convergence protocol entity (PDCP). At the receiving side of the RLC entity, any remaining PDUs that are not able to be reassembled are discarded. At a transmitting side of the RLC entity, all SDUs and PDUs stored in transmit buffers are discarded.
    Type: Application
    Filed: February 12, 2014
    Publication date: June 12, 2014
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Shankar Somasundaram, Rajat P. Mukherjee, Mohammed Sammour
  • Method and apparatus of signaling and procedure to support uplink power level determination
    Patent number: 8718694
    Abstract: Method and apparatus are disclosed for determining a physical uplink power level for transmissions on a physical uplink channel. In one embodiment, a random access channel (RACH) uplink message is transmitted. The RACH uplink message includes a RACH message power level and/or a downlink pathloss figure. A downlink message including a power offset value is received. The physical uplink power level is set for transmissions on the physical uplink channel based on the power offset value. In another embodiment, a RACH uplink message is transmitted and a downlink message including a relative power offset value is received. The physical uplink power level for transmissions on the physical uplink channel is then set based on the relative power off set value.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: May 6, 2014
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Jin Wang, Joseph S. Levy, Stephen E. Terry, Ulises Olvera-Hernandez, Shankar Somasundaram
  • METHODS AND APPARATUS FOR HOME NODE-B DETECTION AND MEASUREMENTS THEREOF
    Publication number: 20140119270
    Abstract: A method and apparatus for selecting or reselecting a home Node-B (HNB), (i.e., a closed subscriber group (CSG) cell), among cells having colliding physical layer signals are disclosed. Once the identity (ID) of an HNB is determined, measurements needed to support cell selection or reselection are performed. A broadcast channel that broadcasts an HNB ID is detected and synchronized to, and information obtained from the broadcast channel is forwarded to a non-access stratum (NAS). The broadcasted HNB ID is checked against an HNB white-list provided by the NAS to determine whether the HNB is suitable for a wireless transmit/receive unit (WTRU). The WTRU selects the HNB to camp on, or changes from a cell currently serving the WTRU to the HNB if it is determined to be more suitable than the current serving cell.
    Type: Application
    Filed: January 6, 2014
    Publication date: May 1, 2014
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Guodong Zhang, Shankar Somasundaram, Shahrokh Nayeb Nazar, Rajat P. Mukherjee
  • Method and apparatus for monitoring for a radio link failure
    Patent number: 8711709
    Abstract: Methods and apparatus are described for monitoring for a radio link failure in a long term evolution-advanced (LTE-A) system operated with carrier aggregation. The methods include criteria for determining radio link failure, recovery events, and the actions that a wireless transmit/receive unit (WTRU) may take upon the occurrence of such events.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: April 29, 2014
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Paul Marinier, Stephen E. Terry, Jean-Louis Gauvreau, Shankar Somasundaram, Peter S. Wang, Ghyslain Pelletier, Marian Rudolf
  • Cell reselection and handover with multimedia broadcast/multicast service
    Patent number: 8712414
    Abstract: A method and apparatus for providing wireless communication services, (e.g., multimedia broadcast multicast services (MBMS)), are disclosed. A wireless transmit/receive unit (WTRU) detects a plurality of target cell evolved Node-Bs (eNodeBs) that neighbor a serving cell eNodeB. The WTRU evaluates cell reselection criteria and determines a neighboring target cell eNodeB to reselect. The WTRU receives and reads master information block (MIB) and system information messages of the neighboring target cell eNodeB, and confirms that the determined neighboring target cell eNodeB is not part of a multimedia broadcast single frequency network (MBSFN). The WTRU identifies the neighboring target cell eNodeB to the serving cell eNodeB.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: April 29, 2014
    Assignee: InterDigital Technology Corporation
    Inventors: Shankar Somasundaram, Mohammed Sammour, Rajat P. Mukherjee, Ulises Olvera-Hernandez, Jin Wang, James M. Miller