Patents by Inventor Haifeng Bi
Haifeng Bi 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).
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Publication number: 20090167543Abstract: A method, system, and computer program product are disclosed for providing end-of-life indicators for uninterruptible power supply (UPS) systems. User input is received regarding designated conditions for activating the end-of-life indicator. The UPS system monitors itself to determine whether monitored conditions correspond to the designating conditions. Upon the monitored conditions corresponding to the designating conditions, an audible or visible end-of-life indicator is activated. For critical systems, a user may specify conservative settings for the designated conditions. For other systems, a user may provide a designated condition (i.e., user input) that results in maximizing service life for the UPS system or associated batteries and reducing costs of ownership and operation.Type: ApplicationFiled: December 28, 2007Publication date: July 2, 2009Applicant: AT&T KNOWLEDGE VENTURES, L.P.Inventor: Haifeng Bi
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Publication number: 20080247521Abstract: A system and method for voicemail delivery is disclosed. A system that incorporates teachings of the present disclosure may include, for example, a voicemail system having a controller element to initiate a communication session with a communication device of a called party to supply one or more recorded voicemail messages. Additional embodiments are disclosed.Type: ApplicationFiled: April 6, 2007Publication date: October 9, 2008Applicant: AT&T KNOWLEDGE VENTURES, L.P.Inventors: Haifeng Bi, Xiaolian Bi
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Publication number: 20080049623Abstract: Methods and apparatus to provide service assurance for communication networks are disclosed. An example apparatus comprises a service provisioning server to initiate provisioning of a service to a user device, and a service testing server to perform a test of the service and to report a service test result to the service provisioning server, the service testing server responsive to a request from the user device to initiate the test of the service, the user device automatically generating the request in response to the service provisioning.Type: ApplicationFiled: August 22, 2006Publication date: February 28, 2008Inventors: Chaoxin Charles Qiu, Haifeng Bi, Robert Francis Dailey
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Publication number: 20070286352Abstract: An analog telephone adapter (ATA) comprises a dial tone generator, control logic and a packet generator. The dial tone generator generates a dial tone when the ATA is in an unregistered state. The control logic processes a dial-out request when the ATA is in the unregistered state. The control logic directs the packet generator to generate an invite packet for an emergency proxy to handle the dial-out request on behalf of the ATA when the ATA is in the unregistered state.Type: ApplicationFiled: June 12, 2006Publication date: December 13, 2007Applicant: SBC Knowledge Ventures, LPInventors: Mehrad Yasrebi, Haifeng Bi, Saji Varughese, Satish Jaganath Parolkar, Robert F. Dailey
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Publication number: 20070286200Abstract: A System and method for reducing and surviving failures in a voice trunking over ATM (VTOA) environment includes a CS-IWF complex having a plurality of interconnected CS-IWF units, each unit having a plurality of processors. An end office building may also be provided for interaction with the VTOA system. The end office building includes multiple T-IWFs, and a switch that distributes calls among the T-IWFs in a load sharing manner. Each T-IWF has a plurality of processors and is part of the VTOA system. A switch management system is also provided in the VTOA system. In order to reduce and survive failures, the switch management system includes a plurality of switch management system units. At least one of the switch management system units is a backup unit for a primary switch management system unit. Each switch management system unit provides application redundancy within itself.Type: ApplicationFiled: April 24, 2007Publication date: December 13, 2007Applicant: AT&T LABS, INC.Inventors: Haifeng BI, George ALLEN, Randy BEAMON, Alice CARLSON, Weijing CHEN, Janice DOERNER, Mehran ESFANDIARI, Gary GIBBONS, Paul KASCHUBE, Bruce NANCE, John PINCH, Tina SIGARTO, Barbara SMITH, Matthew STAFFORD, George YOUNG
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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
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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
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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
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Patent number: 7227837Abstract: A system and method for reducing and surviving failures in a voice trunking over ATM (VTOA) environment includes an ATM network having a plurality of interconnected ATM switches. The VTOA system also includes a CS-IWF complex having a plurality of interconnected CS-IWF units, each unit having a plurality of processors. An end office building may also be provided for interaction with the VTOA system. The end office building includes multiple T-IWFs, and a switch that distributes calls among the T-IWFs in a load sharing manner. Each T-IWF has a plurality of processors and is part of the VTOA system. A switch management system is also provided in the VTOA system. In order to reduce and survive failures, the switch management system includes a plurality of switch management system units. At least one of the switch management system units is a backup unit for at least one primary switch management system unit. Each switch management system unit provides application redundancy within itself.Type: GrantFiled: March 23, 2000Date of Patent: June 5, 2007Assignee: AT&T Labs, Inc.Inventors: Haifeng Bi, George Coleman Allen, Jr., Randy Beamon, Weijing Chen, Janice Elaine Doerner, Mehran Esfandiari, Gary Jonathan Gibbons, Paul August Kaschube, Bruce Allen Nance, John Pinch, Tina Sigarto, Barbara Engel Smith, Matthew Wayne Stafford, George Anthony Young
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Publication number: 20070064622Abstract: Troubleshooting of customer premise equipment installation includes sending information over a communications network to attempt to activate customer premise equipment. A request is received to activate an interactive voice response based troubleshooting component of the customer premise equipment. Information relating to the attempt to activate the customer premise equipment is provided using the interactive voice response based troubleshooting component of the customer premise equipment.Type: ApplicationFiled: September 16, 2005Publication date: March 22, 2007Applicant: SBC Knowledge Ventures, L.P.Inventors: Haifeng Bi, William Hurst
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Publication number: 20070064714Abstract: Troubleshooting of customer premise equipment installation includes receiving a request for troubleshooting information over a wireless link. The troubleshooting also includes providing information relating to an attempt to activate the customer premise equipment over the wireless link in response to receiving the request for troubleshooting information over the wireless link.Type: ApplicationFiled: September 16, 2005Publication date: March 22, 2007Applicant: SBC Knowledge Ventures, L.P.Inventors: Haifeng Bi, Albert Wilhelm, Tracy Zavelson, Mark Roche
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Publication number: 20070008977Abstract: Narrowband signaling from a transfer node for a call originating at an end office is received at a centralized control and signaling interworking function device in an asynchronous transfer mode switching network. The received narrowband signaling is converted to broadband signaling. The broadband signaling is provided to a plurality of trunk interworking function devices via the asynchronous transfer mode switching network, to establish a connection across the asynchronous transfer mode switching network, when the centralized control and signaling interworking function device and the plurality of trunk interworking function devices are determined to be members of a closed user group.Type: ApplicationFiled: September 14, 2006Publication date: January 11, 2007Applicant: SBC Technology Resources, Inc.Inventors: Haifeng BI, Matthew STAFFORD, Tina SIGARTO
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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
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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
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Patent number: 7136378Abstract: A method for providing secure communications through a communications network comprising ATM channels and TDM channels. The communications network includes at least one closed user group of network elements configured to communicate with only other network elements in the closed user group. The method receives a connection setup request at an ingress ATM switch, via a UNI attached to the ATM switch, in response to a call initiated through a TDM channel. The UNI interfaces a first network element of the closed user group with the ATM switch. The method further verifies that an ATM End System Address (AESA) contained in calling party information of the connection setup request is consistent with the attached UNI. Additionally, the method establishes a connection with at least a second network element of the closed user group through an egress ATM switch in the communications network when the AESA is consistent with the attached UNI.Type: GrantFiled: March 31, 2004Date of Patent: November 14, 2006Assignee: SBC Technology Resources, Inc.Inventors: Haifeng Bi, Matthew Wayne Stafford, Tina M. Sigarto
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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
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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
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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
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Publication number: 20040179531Abstract: A method for providing secure communications through a communications network comprising ATM channels and TDM channels. The communications network includes at least one closed user group of network elements configured to communicate with only other network elements in the closed user group. The method receives a connection setup request at an ingress ATM switch, via a UNI attached to the ATM switch, in response to a call initiated through a TDM channel. The UNI interfaces a first network element of the closed user group with the ATM switch. The method further verifies that an ATM End System Address (AESA) contained in calling party information of the connection setup request is consistent with the attached UNI. Additionally, the method establishes a connection with at least a second network element of the closed user group through an egress ATM switch in the communications network when the AESA is consistent with the attached UNI.Type: ApplicationFiled: March 31, 2004Publication date: September 16, 2004Applicant: SBC Technology Resources, Inc.Inventors: Haifeng Bi, Matthew Wayne Stafford, Tina M. Sigarto
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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