Patents by Inventor Debashish Purkayastha

Debashish Purkayastha 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: 9143539
    Abstract: Techniques for inter-user equipment (UE) transfer (IUT) are disclosed. An application server receives an IUT request for transfer of a media session toward at least one UE such that a media stream is played by at least two UEs that are geographically separated after the transfer. The application server triggers inter-destination media synchronization (IDMS) for group synchronization of the media session among the UEs. The media stream may be anchored at a media server, and a media synchronization application server for the IDMS may be running at the media server. Alternatively, the media stream may be anchored at a media resource function (MRF), and a media synchronization application server for the IDMS may be running at the MRF.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: September 22, 2015
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hang Liu, Kamel M. Shaheen, Milan Patel, Xavier De Foy, Osama Lotfallah, Debashish Purkayastha
  • Publication number: 20150229465
    Abstract: A method and apparatus are described for synchronizing mobile station (i.e., wireless transmit/receive unit (WTRU)) media flows during a collaboration session. Inter-WTRU transfer request messages, flow addition request messages and session update request messages may be exchanged between a plurality of WTRUs and a session continuity control application server (SCC-AS). Each of the messages may include a session description protocol (SDP) attribute line containing time synchronization information (e.g., a presentation time offset (PTO) information element (IE), a media flow group identity (ID) and a synchronization tolerance IE). The SCC-AS may update the time synchronization information and include the updated information in messages it sends to the WTRUs, which may re-synchronize their respective media flows based on the updated time synchronization information.
    Type: Application
    Filed: April 20, 2015
    Publication date: August 13, 2015
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Xavier De Foy, Milan Patel, Kamel M. Shaheen, Debashish Purkayastha, Osama Lotfallah, Hang Liu
  • Patent number: 9014170
    Abstract: A method and apparatus are described for synchronizing mobile station (i.e., wireless transmit/receive unit (WTRU)) media flows during a collaboration session. Inter-WTRU transfer request messages, flow addition request messages and session update request messages may be exchanged between a plurality of WTRUs and a session continuity control application server (SCC-AS). Each of the messages may include a session description protocol (SDP) attribute line containing time synchronization information (e.g., a presentation time offset (PTO) information element (IE), a media flow group identity (ID) and a synchronization tolerance IE). The SCC-AS may update the time synchronization information and include the updated information in messages it sends to the WTRUs, which may re-synchronize their respective media flows based on the updated time synchronization information.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: April 21, 2015
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Xavier De Foy, Milan Patel, Kamel M. Shaheen, Debashish Purkayastha, Osama Lotfallah, Hang Liu
  • Patent number: 9008065
    Abstract: Methods and network nodes are described. A network node receives an attach request message from a wireless transmit/receive unit (WTRU) via a cellular radio access network (RAN). The attach request message includes a mobile station (MS) radio access capability information element (IE), and the MS radio access capability IE includes a field that indicates whether the WTRU is capable of receiving services from a core network via a non-cellular wireless access network. The network node provides services from the core network to the WTRU.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: April 14, 2015
    Assignee: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Kamel M. Shaheen
  • Publication number: 20150057011
    Abstract: Systems and methods for using a communication system in a spectrum are provided. For example, a random access or RACH procedure may be performed where the random access or RACH procedure may be configured to reduce secondary interference and/or to be used in a pixel-based environment. The random access or RACH procedure may include selecting a RACH preamble; sending a RACH preamble and/or format information; determining a transmission power of the RACH preamble and/or the format information; determining a random access radio network temporary identifier (RA-RNTI) and preamble ID associated with the RACH preamble; and/or selecting a physical RACH (PRACH).
    Type: Application
    Filed: February 24, 2013
    Publication date: February 26, 2015
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Rocco Di Girolamo, Martino M. Freda, Jean-Louis Gauvreau, Scott Laughlin, Debashish Purkayastha
  • Patent number: 8948151
    Abstract: Methods and network nodes are described. A network node receives an attach request message from a wireless transmit/receive unit (WTRU) via a cellular radio access network (RAN). The attach request message includes a mobile station (MS) radio access capability information element (IE), and the MS radio access capability IE includes a field that indicates whether the WTRU is capable of receiving services from a core network via a non-cellular wireless access network. The network node provides services from the core network to the WTRU.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: February 3, 2015
    Assignee: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Kamel M. Shaheen
  • Publication number: 20150023244
    Abstract: Methods and apparatus are provided for performing group-based machine-to-machine communication. Machine-type communication (MTC) wireless transmit/receive units (WTRUs) may operate in MTC groups. MTC WTRUs belonging to the same MTC group may use a group-based International Mobile Subscriber Identity (IMSI) and a group-based IP address for data transmission. Group-based network registration may be performed. A group-based IP address and radio resources may be proactively allocated for an MTC group. A master MTC may perform network registration/attachment process on behalf of the MTC group. A group of MTC WTRUs may transmit data according to staggered time windows.
    Type: Application
    Filed: October 3, 2014
    Publication date: January 22, 2015
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Kamel M. Shaheen, Debashish Purkayastha
  • Publication number: 20150018002
    Abstract: Systems, methods, and apparatus may be used to provide assistance for connection procedures in a hierarchical network where macro cells may be operating in licensed spectrum while small cells may be operating in dynamic and shared spectrums, such as TVWS. This may be done, for example, to allow an LTE system performing carrier aggregation (CA) to reconfigure itself to change from a supplementary cell (SuppCell) in one dynamic and shared spectrum channel to a SuppCell in another dynamic and shared spectrum channel.
    Type: Application
    Filed: February 22, 2013
    Publication date: January 15, 2015
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Athmane Touag, Jean-Louis Gauvreau, Rocco Di Girolamo, Martino Freda, Joseph M. Murray, Mihaela C. Beluri, Scott Laughlin, Debashish Purkayastha, Angelo A. Cuffaro
  • Patent number: 8891423
    Abstract: Methods and apparatus are provided for performing group-based machine-to-machine communication. Machine-type communication (MTC) wireless transmit/receive units (WTRUs) may operate in MTC groups. MTC WTRUs belonging to the same MTC group may use a group-based International Mobile Subscriber Identity (IMSI) and a group-based IP address for data transmission. Group-based network registration may be performed. A group-based IP address and radio resources may be proactively allocated for an MTC group. A master MTC may perform network registration/attachment process on behalf of the MTC group. A group of MTC WTRUs may transmit data according to staggered time windows.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: November 18, 2014
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Kamel M. Shaheen, Debashish Purkayastha
  • Publication number: 20140161002
    Abstract: A method and apparatus for operating supplementary cells in licensed exempt (LE) spectrum. An aggregating cell operating in a frequency division duplex (FDD) licensed spectrum is aggregated with a LE supplementary cell operating in a time sharing mode for uplink (UL) and downlink (DL) operations. The LE supplementary cell may be an FDD supplementary cell dynamically configurable between an UL only mode, a DL only mode, and a shared mode, to match requested UL and DL traffic ratios. The LE supplementary cell may be a time division duplex (TDD) supplementary cell. The TDD supplementary cell may be dynamically configurable between multiple TDD configurations. A coexistence capability for coordinating operations between the LE supplementary cell with other systems operating in the same channel is provided. Coexistence gaps are provided to measure primary/secondary user usage and permit other systems operating in the LE supplementary cell channel to access the channel.
    Type: Application
    Filed: February 7, 2012
    Publication date: June 12, 2014
    Inventors: Jean-Louis Gauvreau, Martino M. Freda, Zinan Lin, Joseph M. Murray, Chunxuan Ye, Erdem Bala, Mihaela C. Beluri, Douglas R. Castor, Amith V. Chincholi, Angelo A. Cuffaro, Yuying Dai, Alpaslan Demir, Joseph W. Gredone, Rui Yang, Liangping Ma, Rocco DiGirolamo, Debashish Purkayastha, Athmane Touag
  • Publication number: 20140119285
    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: December 30, 2013
    Publication date: May 1, 2014
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Kamel M. Shaheen, Prabhakar R. Chitrapu, Brian G. Kiernan, Debashish Purkayastha
  • Publication number: 20140115037
    Abstract: A method and apparatus for automatically discovering and retrieving content based on a content identity (ID) are disclosed. User agents and content control entities in the network interact for registering the content, discovering the content hosts and sources, and initiating and controlling the content session. A content name resolution handler (CNRH) is provided for mapping content IDs to network locations or addresses. Two or more content service provider networks may interconnect each other to discover and retrieve the content. A content request from a client device includes a content ID that uniquely identifies a content object. The content ID is resolved with a CNRH to obtain identity information of at least one content provider for serving the content request, and the content request is forwarded to the selected content provider. The content request may be routed to the selected content provider via IP multimedia subsystem (IMS) control plane entities.
    Type: Application
    Filed: January 25, 2012
    Publication date: April 24, 2014
    Inventors: Hang Liu, Xavier DeFoy, Osama Lotfallah, Debashish Purkayastha, Robert G. Gazda, Serhad Doken
  • Publication number: 20140094166
    Abstract: Methods and network nodes are described. A network node receives an attach request message from a wireless transmit/receive unit (WTRU) via a cellular radio access network (RAN). The attach request message includes a mobile station (MS) radio access capability information element (IE), and the MS radio access capability IE includes a field that indicates whether the WTRU is capable of receiving services from a core network via a non-cellular wireless access network. The network node provides services from the core network to the WTRU.
    Type: Application
    Filed: December 3, 2013
    Publication date: April 3, 2014
    Applicant: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Kamel M. Shaheen
  • Patent number: 8638769
    Abstract: Method and apparatus for enabling a wireless terminal to communicate the dual-mode capabilities and reporting the interworking capabilities of the two networks with which the wireless terminal have the added capability of obtaining services from either one of the interworking networks.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: January 28, 2014
    Assignee: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Kamel M. Shaheen
  • Patent number: 8619757
    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: April 30, 2004
    Date of Patent: December 31, 2013
    Assignee: InterDigital Technology Corporation
    Inventors: Kamel M. Shaheen, Prabhakar R. Chitrapu, Brian Gregory Kiernan, Debashish Purkayastha
  • Patent number: 8331315
    Abstract: A wireless transmit/receive unit (WTRU) may include two or more modems, each configured to link to a different network, and a media independent handover (MIH) client. An application programming interfaces (API) may provide the MIH client with mechanisms to receive information about links, control the modems for handover, discover a MIH server and IP multimedia system nodes, trigger mobile IP handover, etc. If a link has been successfully established, the MIH client may start a MIH session. When the modem indicates that a connection is going to be terminated, the MIH client may activate the second modem for handover. If the first modem indicates that a link parameter has crossed a threshold, the MIH client may send signal measurements to a MIH server. After receiving a media independent handover switch request, the MIH client may initiate handover to the second network.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: December 11, 2012
    Assignees: InterDigital Technology Corporation, SK Telecom, Co. Ltd.
    Inventors: Debashish Purkayastha, Shamim Akbar Rahman, Khalid S. Hossain, Michelle Perras, Hyun Wook Kim, Yong Sun Cho, Suan Eoh, Jean-Ian Boutin
  • Publication number: 20120307794
    Abstract: A method of Inter-User Equipment (UE) Transfer (IUT) for use in a Home enhanced-Node B (H(e)NB), the method comprising receiving a transfer command from a first IMS capable WTRU via IMS signaling, translating the transfer command to a non-IMS based message, and transmitting the translated non-IMS based message to a Service Centralization and Continuity Application Server (SCC AS).
    Type: Application
    Filed: November 5, 2010
    Publication date: December 6, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Kamel M. Shaheen, Robert G. Gazda, Xavier De Foy, Debashish Purkayastha
  • Publication number: 20120281621
    Abstract: A method and apparatus for generating a topology for wireless peer-to-peer (P2P) networks. A network architecture comprises a traffic optimization service including a traffic optimization server and an adaptor to effect bi-directional translation of a request-response protocol of the traffic optimization service and a signaling protocol of a multimedia network. The traffic optimization server stores information related to wireless communication systems comprising user/location id information including cache proxies, media gateways, and network peers of multiple access networks and cost metric information including maximum bit rate, guaranteed bit rate, storage capacity, CPU capabilities, number of clients serving, battery capabilities, reliability of path, and supported video/audio codec.
    Type: Application
    Filed: April 5, 2012
    Publication date: November 8, 2012
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Osama Lotfallah, Milan Patel, Xavier De Foy, Debashish Purkayastha, Hang Liu, Kamel M. Shaheen
  • Publication number: 20120236842
    Abstract: A method and apparatus are described for synchronizing mobile station (i.e., wireless transmit/receive unit (WTRU)) media flows during a collaboration session. Inter-WTRU transfer request messages, flow addition request messages and session update request messages may be exchanged between a plurality of WTRUs and a session continuity control application server (SCC-AS). Each of the messages may include a session description protocol (SDP) attribute line containing time synchronization information (e.g., a presentation time offset (PTO) information element (IE), a media flow group identity (ID) and a synchronization tolerance IE). The SCC-AS may update the time synchronization information and include the updated information in messages it sends to the WTRUs, which may re-synchronize their respective media flows based on the updated time synchronization information.
    Type: Application
    Filed: February 9, 2012
    Publication date: September 20, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Xavier De Foy, Milan Patel, Kamel M. Shaheen, Debashish Purkayastha, Osama Lotfallah, Hang Liu
  • Patent number: 8201216
    Abstract: An embodiment is related to a database system for protecting data privacy and efficient organization of data. An enhanced database system comprises a DBMS, a data classifier, a database of applications and a rules and policy unit. The DBMS includes a query processor for processing a query from a user. The rules and policy unit outputs a pointer to a node within the data classification tree based on several criteria. In accordance with another embodiment, a DBMS residing within a communication network organizes data related to the ID of mobile users. In accordance with another embodiment, an enhanced database system comprises a DRM user agent and a DBMS. The DRM user agent receives a CO protected by DRM. The DBMS stores the CO and controls access to the CO based on restrictions specified in an RO associated with the CO.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: June 12, 2012
    Assignee: InterDigital Technology Corporation
    Inventors: Inhyok Cha, Debashish Purkayastha, Richard D. Herschaft, Yogendra C. Shah