Patents by Inventor Samuel Sigarto
Samuel Sigarto 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: 8059536Abstract: Reducing connection overhead in a communications network includes reusing at least one cached communication channel connecting a source and a destination. The at least one cached communication channel is cached for a variable duration.Type: GrantFiled: August 4, 2009Date of Patent: November 15, 2011Assignee: AT&T Labs, Inc.Inventors: Yetik Serbest, Haifeng Bi, Samuel Sigarto
-
Publication number: 20090296576Abstract: Reducing connection overhead in a communications network includes reusing at least one cached communication channel connecting a source and a destination. The at least one cached communication channel is cached for a variable duration.Type: ApplicationFiled: August 4, 2009Publication date: December 3, 2009Applicant: AT&T LABS, INCInventors: Yetik SERBEST, Haifeng BI, Samuel SIGARTO
-
Patent number: 7586844Abstract: Virtual circuits are dynamically established in a telecommunications network. A cache duration is adaptively determined based on at least one characteristic of the telecommunications network. A virtual circuit is established for a connection between a source and a destination. The virtual circuit is cached when the connection between the source and the destination terminates. The cached virtual circuit is reused when a new connection request occurs during the cache duration. The cached virtual circuit is released after the cache duration when no new connection request occurs during the cache duration.Type: GrantFiled: June 11, 2007Date of Patent: September 8, 2009Assignee: AT&T Labs, Inc.Inventors: Yetik Serbest, Haifeng Bi, Samuel Sigarto
-
Patent number: 7304986Abstract: A distributed network switching system includes a data network. The system also includes multiple access interworking function (A-IWF) devices each operating as a gateway that enables customer premises devices to directly interface into the data network. The system further includes a centralized control and signaling interworking function (CS-IWF) device that performs call control functions and administrative functions and is adapted to interface narrowband and broadband signaling for call processing and control within the data network.Type: GrantFiled: July 7, 2006Date of Patent: December 4, 2007Assignee: AT&T Labs, Inc.Inventors: George Coleman Allen, Jr., Steven R. Partridge, Samuel Sigarto, Tina Sigarto, Haifeng Bi, Richard Wayne Stephenson
-
Publication number: 20070230340Abstract: Virtual circuits are dynamically established in a telecommunications network. A cache duration is adaptively determined based on at least one characteristic of the telecommunications network. A virtual circuit is established for a connection between a source and a destination. The virtual circuit is cached when the connection between the source and the destination terminates. The cached virtual circuit is reused when a new connection request occurs during the cache duration. The cached virtual circuit is released after the cache duration when no new connection request occurs during the cache duration.Type: ApplicationFiled: June 11, 2007Publication date: October 4, 2007Applicant: AT&T LABS, INC.Inventors: Yetik SERBEST, Haifeng BI, Samuel SIGARTO
-
Patent number: 7248562Abstract: An adaptive SVC caching method and system are provided to offload the high processing capacity burden of ATM switches. After an SVC is established in a usual way for a call, it is not torn down after the conversation ends. Instead, the SVC is kept alive for a variable duration (i.e., delayed release) with the expectation that there will be another call request for the same terminating end office during that time. The caching duration is adaptively changed with call arrival rate and call setup delay in the ATM network in order to stay within a delay budget specified by the requirements.Type: GrantFiled: December 17, 2001Date of Patent: July 24, 2007Assignee: AT&T Labs, Inc.Inventors: Yetik Serbest, Haifeng Bi, Samuel Sigarto
-
Publication number: 20060274735Abstract: A distributed network switching system includes a data network. The system also includes multiple access interworking function (A-IWF) devices each operating as a gateway that enables customer premises devices to directly interface into the data network. The system further includes a centralized control and signaling interworking function (CS-IWF) device that performs call control functions and administrative functions and is adapted to interface narrowband and broadband signaling for call processing and control within the data network.Type: ApplicationFiled: July 7, 2006Publication date: December 7, 2006Applicant: SBC Technology Resources, Inc.Inventors: George Allen, Steven Partridge, Samuel Sigarto, Tina Sigarto, Haifeng Bi, Richard Stephenson
-
Publication number: 20060274732Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.Type: ApplicationFiled: July 7, 2006Publication date: December 7, 2006Applicant: SBC Technology Resources, Inc.Inventors: George Allen, Haifeng Bi, Steven Partridge, Samuel Sigarto, Richard Stephenson
-
Patent number: 7099311Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.Type: GrantFiled: December 21, 2001Date of Patent: August 29, 2006Assignee: SBC Technology Resources, Inc.Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
-
Patent number: 7095734Abstract: A distributed network switching system includes a data network. The system also includes multiple access interworking function (A-IWF) devices each operating as a gateway that enables customer premises devices to directly interface into the data network. The system further includes a centralized control and signaling interworking function (CS-IWF) device that performs call control functions and administrative functions and is adapted to interface narrowband and broadband signaling for call processing and control within the data network.Type: GrantFiled: June 4, 2004Date of Patent: August 22, 2006Assignee: SBC Technology Resources, Inc.Inventors: George Coleman Allen, Jr., Steven R. Partridge, Samuel Sigarto, Tina Sigarto, Haifeng Bi, Richard Wayne Stephenson
-
Publication number: 20040233909Abstract: An Asynchronous Transfer Mode (ATM)-based distributed network switching system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes multiple access interworking function (A-IWF) devices each operating as a gateway that enables customer premises devices to directly interface into the distributed ATM switching fabric. The system further includes a centralized control and signaling interworking function (CS-IWF) device that performs call control functions and administrative functions and is adapted to interface narrowband and broadband signaling for call processing and control within the ATM switching network. The CS-IWF device may be a server farm.Type: ApplicationFiled: June 4, 2004Publication date: November 25, 2004Applicant: SBC Technology Resources, Inc.Inventors: George Coleman Allen, Steven R. Partridge, Samuel Sigarto, Tina Sigarto, Haifeng Bi, Richard Wayne Stephenson
-
Patent number: 6765903Abstract: An Asynchronous Transfer Mode (ATM)-based distributed network switching system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes multiple access interworking function (A-IWF) devices each operating as a gateway that enables customer premises devices to directly interface into the distributed ATM switching fabric. The system further includes a centralized control and signaling interworking function (CS-IWF) device that performs call control functions and administrative functions and is adapted to interface narrowband and broadband signaling for call processing and control within the ATM switching network. The CS-IWF device may be a server farm.Type: GrantFiled: May 23, 2000Date of Patent: July 20, 2004Assignee: SBC Technology Resources, Inc.Inventors: George Coleman Allen, Jr., Steven R. Partridge, Samuel Sigarto, Tina Sigarto, Haifeng Bi, Richard Wayne Stephenson
-
Publication number: 20020093947Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.Type: ApplicationFiled: December 21, 2001Publication date: July 18, 2002Applicant: SBC TECHNOLOGY RESOURCES, INC.Inventors: George C. Allen, Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
-
Publication number: 20020064129Abstract: An adaptive SVC caching method and system are provided to offload the high processing capacity burden of ATM switches. After an SVC is established in a usual way for a call, it is not torn down after the conversation ends. Instead, the SVC is kept alive for a variable duration (i.e., delayed release) with the expectation that there will be another call request for the same terminating end office during that time. The caching duration is adaptively changed with call arrival rate and call setup delay in the ATM network in order to stay within a delay budget specified by the requirements.Type: ApplicationFiled: December 17, 2001Publication date: May 30, 2002Applicant: SBC TECHNOLOGY RESOURCES, Inc.Inventors: Yetik Serbest, Haifeng Bi, Samuel Sigarto
-
Patent number: 6389011Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.Type: GrantFiled: February 28, 2001Date of Patent: May 14, 2002Assignee: SBC Technology Resources, Inc.Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
-
Patent number: 6345048Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.Type: GrantFiled: September 21, 2000Date of Patent: February 5, 2002Assignee: SBC Technology Resources, Inc.Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
-
Patent number: 6343065Abstract: An adaptive SVC caching method and system are provided to offload the high processing capacity burden of ATM switches. After an SVC is established in a usual way for a call, it is not torn down after the conversation ends. Instead, the SVC is kept alive for a variable duration (i.e., delayed release) with the expectation that there will be another call request for the same terminating end office during that time. The caching duration is adaptively changed with call arrival rate and call setup delay in the ATM network in order to stay within a delay budget specified by the requirements.Type: GrantFiled: January 20, 2000Date of Patent: January 29, 2002Assignee: SBC Technology Resources, Inc.Inventors: Yetik Serbest, Haifeng Bi, Samuel Sigarto
-
Publication number: 20010017861Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.Type: ApplicationFiled: February 28, 2001Publication date: August 30, 2001Applicant: SBC TECHNOLOGY RESOURCES, INC.Inventors: George C. Allen, Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
-
Patent number: 6219348Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking finction (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.Type: GrantFiled: May 1, 2000Date of Patent: April 17, 2001Assignee: SBC Technology Resources, Inc.Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson
-
Patent number: 6169735Abstract: An Asynchronous Transfer Mode (ATM)-based distributed virtual tandem switching system is provided in which a network of ATM-based devices is combined to create a distributed virtual tandem switch. The system includes an ATM switching network that dynamically sets up individual switched virtual connections. The system also includes a trunk interworking function (T-IWF) device and a centralized control and signaling interworking function (CS-IWF) device. The trunk interworking function device converts end office voice trunks from TDM channels to ATM cells by employing a structured circuit emulation service. The centralized control and signaling interworking function device performs call control functions and interfaces narrowband signaling and broadband signaling for call processing and control within the ATM switching network. Consequently, the ATM based distributed virtual tandem switching system replaces a standard tandem switch in the PSTN.Type: GrantFiled: April 7, 1999Date of Patent: January 2, 2001Assignee: SBC Technology Resources, Inc.Inventors: George C. Allen, Jr., Haifeng Bi, Steven R. Partridge, Samuel Sigarto, Richard W. Stephenson