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).

  • Publication number: 20120143984
    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: Application
    Filed: November 17, 2011
    Publication date: June 7, 2012
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Hang Liu, Kamel M. Shaheen, Milan Patel, Xavier De Foy, Osama Lotfallah, Debashish Purkayastha
  • Patent number: 8190191
    Abstract: A multiple radio access technology (RAT) apparatus with mobility middleware provides a user with access to various RAT networks, such as a frequency division duplex (FDD) network and a wireless local area network (WLAN). In one embodiment, the apparatus is a dual mode FDD/WLAN converged wireless communication handset which includes a terminal equipment (TE) module having mobility middleware, an applications and protocols processor and a terminal interface (TI). The dual mode FDD/WLAN converged wireless communication handset further includes a user services identity module (USIM), a mobile termination (MT) module and a protocol stack which interface with the mobility middleware via a plurality of links.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: May 29, 2012
    Assignee: InterDigital Technology Corporation
    Inventors: Catherine M. Livet, Debashish Purkayastha, Shamim Akbar Rahman, Guang Lu, Alan Gerald Carlton, Narayan Parappil Menon
  • Patent number: 8149790
    Abstract: Apparatus for bi-directional handover are disclosed. An apparatus configured to perform handover from a wireless code division multiple access (WCDMA) to a wireless broadband (WiBro) network is disclosed. An apparatus configured to perform handover from a WCDMA network to a WiFi (IEEE 802.11x) network is disclosed. An apparatus configured to perform handover from a WiFi network to a WCDMA network is disclosed.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: April 3, 2012
    Assignees: InterDigital Technology Corporation, SK Telecom, Co. Ltd.
    Inventors: Debashish Purkayastha, Shamim Akbar Rahman
  • Patent number: 8134978
    Abstract: A radio interface layer media independent handover (RIL MIH) client functionality enables transparent inter-system handover of a wireless transmit/receive unit (WTRU) between different radio access technologies (RATs), without user intervention. The RIL MIH client interacts with RIL drivers and proxies, informs the RIL proxies of the handover status, then the proxies interact with a new driver in use. A WTRU is modified to add MIH functionality to a telephony server to support inter-system handover.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: March 13, 2012
    Assignees: InterDigital Technology Corporation, SK Telecom Company, Ltd.
    Inventors: Debashish Purkayastha, Michelle Perras, Shamim Akbar Rahman, Ulises Olvera-Hernandez, Alan G. Carlton, Samian Kaur
  • Publication number: 20120057582
    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: Application
    Filed: October 31, 2011
    Publication date: March 8, 2012
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Debashish Purkayastha, Kamel M. Shaheen
  • Patent number: 8102823
    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: March 17, 2005
    Date of Patent: January 24, 2012
    Assignee: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, Kamel M. Shaheen
  • Publication number: 20120004003
    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: December 22, 2010
    Publication date: January 5, 2012
    Inventors: Kamel M. Shaheen, Debashish Purkayastha
  • Publication number: 20110310876
    Abstract: An Application Server Autonomous Access (ASAA) system for providing autonomous access to a wireless infrastructure by devices employing different types of access technology. The system includes a server, having an associated data storage device, for storing at least one policy, and a plurality of subnetworks, coupled to server, for providing access to the server. The plurality of subnetworks employ at least two different types of access technology. A plurality of wireless transmit/receive units (WTRUs) are wirelessly coupled to at least one of the subnetworks. The server monitors the wireless coupling and, depending upon the at least one policy, switches the WTRUs between different ones of the subnetworks.
    Type: Application
    Filed: September 1, 2011
    Publication date: December 22, 2011
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Alan Gerald Carlton, Narayan Parappil Menon, Debashish Purkayastha
  • Patent number: 8014367
    Abstract: An Application Server Autonomous Access (ASAA) system for providing autonomous access to a wireless infrastructure by devices employing different types of access technology. The system includes a server, having an associated data storage device, for storing at least one policy, and a plurality of subnetworks, coupled to server, for providing access to the server. The plurality of subnetworks employ at least two different types of access technology. A plurality of wireless transmit/receive units (WTRUs) are wirelessly coupled to at least one of the subnetworks. The server monitors the wireless coupling and, depending upon the at least one policy, switches the WTRUs between different ones of the subnetworks.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: September 6, 2011
    Assignee: InterDigital Technology Corporation
    Inventors: Alan Gerald Carlton, Narayan Parappil Menon, Debashish Purkayastha
  • Publication number: 20110196973
    Abstract: A method and apparatus for Inter-Device Session Continuity (IDSC). IDSC may include session transfer, session duplication, peer discovery, media transport control, session retrieval, and peer device detection of media streams between wireless transmit receive units (WTRUs) in real-time via Inter-User Equipment Transfer (IUT) across any internet protocol (IP) based network. This framework allows for both collaborative and non-collaborative media sessions, media session transport and shared media session control under the same subscription or multiple subscriptions.
    Type: Application
    Filed: February 4, 2011
    Publication date: August 11, 2011
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Kamel M. Shaheen, Debashish Purkayastha, Xavier DeFoy, Michelle Perras
  • Publication number: 20110188449
    Abstract: A method and apparatus for performing session duplication are provided. A communication session between a first wireless transmit/receive unit (WTRU) and a remote device may be duplicated to add a second WTRU to the communication session without disruption of the communication session on the first WTRU or the remote device. The communication session may be duplicated by a network unit in response to a policy or a communication session duplication request. The first WTRU or the second WTRU may initiate session duplication by transmitting a communication session duplication request. Session duplication may include duplication of one or more media flows associated with the communication session. Session duplication may include transferring or sharing control of the communication session.
    Type: Application
    Filed: November 16, 2010
    Publication date: August 4, 2011
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Kamel M. Shaheen, Oscar Lopez-Torres, Debashish Purkayastha
  • Publication number: 20110145419
    Abstract: A method and apparatus for performing session release are provided. For a transferred communication session between a plurality of wireless transmit/receive units (WTRUs) and a remote device, wherein at least one of the WTRUs performs the transferred communication session in association with a first Internet Protocol Multimedia Subsystem (IMS) and at least one other of the WTRUs performs the transferred communication session in association with a second IMS, session release may include releasing the transferred communication session, a portion thereof, one or more of the WTRUs, or a collaborative session associated with the transferred communication session while maintaining service continuity. Any one of the plurality of WTRUs or the remote device may initiate the session release by transmitting a release request. Any one of the plurality of WTRUs may control the transferred communication session and may modify or reject a release request.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 16, 2011
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Kamel M. Shaheen, Milan Patel, Xavier De Foy, Debashish Purkayastha
  • Publication number: 20110138060
    Abstract: A method and apparatus for session duplication within the advanced multimedia system (AMS) framework are disclosed. The method includes duplicating a session running on a first application or device on a second application or device. A method and apparatus for sharing media is disclosed. The method includes sharing media running on a first application or device with a second application or device.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 9, 2011
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Debashish Purkayastha, Kamel M. Shaheen
  • Publication number: 20110116473
    Abstract: A method and apparatus for Inter-User Equipment Transfer (IUT) of an IP Multimedia (IM) Subsystem (IMS) session between a circuit switched (CS) wireless transmit/receive unit (WTRU) and an IMS-capable WTRU.
    Type: Application
    Filed: November 10, 2010
    Publication date: May 19, 2011
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Kamel M. Shaheen, Xavier De Foy, Debashish Purkayastha
  • Publication number: 20110116495
    Abstract: Methods and apparatus for inter-device session transfer between devices operating according to different protocols are disclosed. The session may be a multimedia session supported by. Session Initiation Protocol (SIP) and the H.323 standard. The devices may include a SIP Client or an H.323 Client. The SIP Client may be an IMS-based SIP Client. An InterWorking Function (IWF) may support a session transfer from a SIP Client to an H.323 Client or from an H.323 Client to a SIP Client. A Media Gateway Control Function (MGCF) may support a session transfer from an Internet Protocol (IP) Multimedia Subsystem (IMS)-based SIP Client to an H.323 Client or from an H.323 Client to an IMS-based SIP Client.
    Type: Application
    Filed: November 3, 2010
    Publication date: May 19, 2011
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Debashish Purkayastha, Kamel M. Shaheen, Robert G. Gazda
  • Publication number: 20100220687
    Abstract: A network management node may manage a network of base stations and wireless transmit/receive units (WTRUs) that operate using diverse radio access technologies. The network management node may communicate with other network management nodes to manage spectrum usage across their respective managed networks. The network management node may acts as a proxy for cellular-capable WTRUs that operate within the managed networks. The network management node may perform handovers of Peer-to-Peer (P2P) groups that operate within the managed networks. The WTRUs may include WTRUs that operate at Very High Frequency (VHF) or Ultra High Frequency (UHF) spectrum (“white space”) frequencies.
    Type: Application
    Filed: February 9, 2010
    Publication date: September 2, 2010
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Alexander Reznik, Debashish Purkayastha, Joseph A. Kwak, Juan Carlos Zuniga, Tianming Li
  • Patent number: 7599515
    Abstract: A method and apparatus for securing transmission of content created by a content generation device embedded in a wireless transmit/receive unit (WTRU) by determining what type of watermarks should be applied to the content and incorporating the watermarks in the content. The WTRU includes a content generation unit, a watermark incorporation unit, and a communication subsystem. The content generation unit is embedded in the WTRU and generates content, such as audio, video, image, text or a combination thereof. The watermark incorporation unit determines the type of watermarks that should be incorporated in the content and incorporates the watermarks in the content. The communication subsystem transmits the watermarked content.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: October 6, 2009
    Assignee: InterDigital Technology Corporation
    Inventors: John Thommana, Debashish Purkayastha, Alain Charles Louis Briancon
  • Publication number: 20090201879
    Abstract: A radio interface layer media independent handover (RIL MIH) client functionality enables transparent inter-system handover of a wireless transmit/receive unit (WTRU) between different radio access technologies (RATs), without user intervention. The RIL MIH client interacts with RIL drivers and proxies, informs the RIL proxies of the handover status, then the proxies interact with a new driver in use. A WTRU is modified to add MIH functionality to a telephony server to support inter-system handover.
    Type: Application
    Filed: October 28, 2008
    Publication date: August 13, 2009
    Applicants: INTERDIGITAL TECHNOLOGY CORPORATION, SK TELECOM COMPANY, LTD
    Inventors: Debashish Purkayastha, Michelle Perras, Shamim Akbar Rahman, Ulises Olvera-Hernandez, Alan G. Carlton, Samian Kaur
  • Patent number: 7574220
    Abstract: A method and apparatus for protecting sensed content and warning a target of sensing is disclosed. A first transceiver, (e.g., a network server), includes a database which defines at least one zone in which sensing a target is not permitted. A second transceiver, (e.g., a cell phone), senses a target to obtain content and temporarily stores the content in a memory, after being encrypted. The cell phone transmits information to the network server which indicates the location of the cell phone. The network server receives the location information from the cell phone and determines whether the target was sensed in a “Do Not Disturb Zone”. If so, the network server instructs the cell phone to delete the encrypted content from the memory. Otherwise, the network server indicates to the cell phone that the temporarily stored content may be decrypted, stored in a permanent memory and used as desired.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: August 11, 2009
    Assignee: InterDigital Technology Corporation
    Inventors: Debashish Purkayastha, John Thommana
  • Publication number: 20090161629
    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: Application
    Filed: September 12, 2008
    Publication date: June 25, 2009
    Applicants: 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